From ee2f02356f2e18e65d8ac276797ebcd91d3fd9b2 Mon Sep 17 00:00:00 2001 From: David Li Date: Fri, 8 Mar 2024 11:41:44 -0500 Subject: [PATCH] refactor(c/driver/sqlite): port to driver base Fixes #1141. Fixes #1355. Fixes #1602. --- CONTRIBUTING.md | 2 + LICENSE.txt | 26 + c/CMakeLists.txt | 3 + c/driver/common/utils.h | 19 - c/driver/framework/CMakeLists.txt | 44 + c/driver/framework/base.h | 696 +++ c/driver/framework/base_connection.h | 308 + c/driver/framework/base_database.h | 81 + c/driver/framework/base_statement.h | 379 ++ c/driver/framework/catalog.cc | 263 + c/driver/framework/catalog.h | 145 + c/driver/framework/objects.cc | 304 + c/driver/framework/objects.h | 39 + c/driver/framework/status.h | 253 + c/driver/framework/type_fwd.h | 24 + c/driver/postgresql/CMakeLists.txt | 2 + c/driver/postgresql/connection.cc | 37 +- c/driver/sqlite/CMakeLists.txt | 4 +- c/driver/sqlite/sqlite.cc | 1415 +++++ c/driver/sqlite/sqlite_test.cc | 9 +- c/driver_manager/adbc_driver_manager_test.cc | 6 +- c/validation/adbc_validation_connection.cc | 27 +- c/vendor/fmt/.clang-format | 8 + c/vendor/fmt/CMakeLists.txt | 453 ++ c/vendor/fmt/CONTRIBUTING.md | 20 + c/vendor/fmt/ChangeLog.md | 5533 +++++++++++++++++ c/vendor/fmt/LICENSE | 27 + c/vendor/fmt/README.md | 490 ++ c/vendor/fmt/include/fmt/args.h | 235 + c/vendor/fmt/include/fmt/chrono.h | 2240 +++++++ c/vendor/fmt/include/fmt/color.h | 643 ++ c/vendor/fmt/include/fmt/compile.h | 535 ++ c/vendor/fmt/include/fmt/core.h | 2969 +++++++++ c/vendor/fmt/include/fmt/format-inl.h | 1678 +++++ c/vendor/fmt/include/fmt/format.h | 4535 ++++++++++++++ c/vendor/fmt/include/fmt/os.h | 455 ++ c/vendor/fmt/include/fmt/ostream.h | 245 + c/vendor/fmt/include/fmt/printf.h | 675 ++ c/vendor/fmt/include/fmt/ranges.h | 738 +++ c/vendor/fmt/include/fmt/std.h | 537 ++ c/vendor/fmt/include/fmt/xchar.h | 259 + c/vendor/fmt/src/fmt.cc | 108 + c/vendor/fmt/src/format.cc | 43 + c/vendor/fmt/src/os.cc | 402 ++ c/vendor/fmt/support/cmake/FindSetEnv.cmake | 7 + c/vendor/fmt/support/cmake/JoinPaths.cmake | 26 + .../fmt/support/cmake/fmt-config.cmake.in | 7 + c/vendor/fmt/support/cmake/fmt.pc.in | 11 + c/vendor/vendor_fmt.sh | 28 + dev/release/rat_exclude_files.txt | 1 + license.tpl | 26 + 51 files changed, 26969 insertions(+), 51 deletions(-) create mode 100644 c/driver/framework/CMakeLists.txt create mode 100644 c/driver/framework/base.h create mode 100644 c/driver/framework/base_connection.h create mode 100644 c/driver/framework/base_database.h create mode 100644 c/driver/framework/base_statement.h create mode 100644 c/driver/framework/catalog.cc create mode 100644 c/driver/framework/catalog.h create mode 100644 c/driver/framework/objects.cc create mode 100644 c/driver/framework/objects.h create mode 100644 c/driver/framework/status.h create mode 100644 c/driver/framework/type_fwd.h create mode 100644 c/driver/sqlite/sqlite.cc create mode 100644 c/vendor/fmt/.clang-format create mode 100644 c/vendor/fmt/CMakeLists.txt create mode 100644 c/vendor/fmt/CONTRIBUTING.md create mode 100644 c/vendor/fmt/ChangeLog.md create mode 100644 c/vendor/fmt/LICENSE create mode 100644 c/vendor/fmt/README.md create mode 100644 c/vendor/fmt/include/fmt/args.h create mode 100644 c/vendor/fmt/include/fmt/chrono.h create mode 100644 c/vendor/fmt/include/fmt/color.h create mode 100644 c/vendor/fmt/include/fmt/compile.h create mode 100644 c/vendor/fmt/include/fmt/core.h create mode 100644 c/vendor/fmt/include/fmt/format-inl.h create mode 100644 c/vendor/fmt/include/fmt/format.h create mode 100644 c/vendor/fmt/include/fmt/os.h create mode 100644 c/vendor/fmt/include/fmt/ostream.h create mode 100644 c/vendor/fmt/include/fmt/printf.h create mode 100644 c/vendor/fmt/include/fmt/ranges.h create mode 100644 c/vendor/fmt/include/fmt/std.h create mode 100644 c/vendor/fmt/include/fmt/xchar.h create mode 100644 c/vendor/fmt/src/fmt.cc create mode 100644 c/vendor/fmt/src/format.cc create mode 100644 c/vendor/fmt/src/os.cc create mode 100644 c/vendor/fmt/support/cmake/FindSetEnv.cmake create mode 100644 c/vendor/fmt/support/cmake/JoinPaths.cmake create mode 100644 c/vendor/fmt/support/cmake/fmt-config.cmake.in create mode 100644 c/vendor/fmt/support/cmake/fmt.pc.in create mode 100755 c/vendor/vendor_fmt.sh diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md index c1cd405e5d..97277c48c9 100644 --- a/CONTRIBUTING.md +++ b/CONTRIBUTING.md @@ -406,7 +406,9 @@ $ cd go/adbc && go-licenses report ./... \ --ignore github.com/apache/arrow/go/v11 \ --ignore github.com/apache/arrow/go/v12 \ --ignore github.com/apache/arrow/go/v13 \ + --ignore github.com/apache/arrow/go/v14 \ --ignore github.com/apache/arrow/go/v15 \ + --ignore github.com/apache/arrow/go/v16 \ --template ../../license.tpl > ../../LICENSE.txt 2> /dev/null ``` diff --git a/LICENSE.txt b/LICENSE.txt index 49f8560e32..6b1a9f794b 100644 --- a/LICENSE.txt +++ b/LICENSE.txt @@ -246,6 +246,32 @@ All rights reserved. -------------------------------------------------------------------------------- +3rdparty dependency {fmt} is statically linked in certain binary +distributions, like the Python wheels. {fmt} is under the MIT license: + +Copyright (c) 2012 - present, Victor Zverovich and {fmt} contributors + +Permission is hereby granted, free of charge, to any person obtaining +a copy of this software and associated documentation files (the +"Software"), to deal in the Software without restriction, including +without limitation the rights to use, copy, modify, merge, publish, +distribute, sublicense, and/or sell copies of the Software, and to +permit persons to whom the Software is furnished to do so, subject to +the following conditions: + +The above copyright notice and this permission notice shall be +included in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE +LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION +OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION +WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + +-------------------------------------------------------------------------------- + 3rdparty dependency Go is statically linked in certain binary distributions, like the Python wheels. The Go project is under the BSD 3-clause license + PATENTS weak patent termination clause diff --git a/c/CMakeLists.txt b/c/CMakeLists.txt index 21d399eee8..06be814267 100644 --- a/c/CMakeLists.txt +++ b/c/CMakeLists.txt @@ -28,8 +28,11 @@ set(CMAKE_CXX_STANDARD_REQUIRED ON) include(CTest) +add_subdirectory(vendor/fmt EXCLUDE_FROM_ALL) +set_target_properties(fmt PROPERTIES POSITION_INDEPENDENT_CODE ON) add_subdirectory(vendor/nanoarrow) add_subdirectory(driver/common) +add_subdirectory(driver/framework) if(ADBC_BUILD_TESTS) add_subdirectory(validation) diff --git a/c/driver/common/utils.h b/c/driver/common/utils.h index ff75fa7208..cab5ddbe28 100644 --- a/c/driver/common/utils.h +++ b/c/driver/common/utils.h @@ -119,25 +119,6 @@ AdbcStatusCode BatchToArrayStream(struct ArrowArray* values, struct ArrowSchema* if (adbc_status_code != ADBC_STATUS_OK) return adbc_status_code; \ } while (0) -/// \defgroup adbc-connection-utils Connection Utilities -/// Utilities for implementing connection-related functions for drivers -/// -/// @{ -AdbcStatusCode AdbcInitConnectionGetInfoSchema(struct ArrowSchema* schema, - struct ArrowArray* array, - struct AdbcError* error); -AdbcStatusCode AdbcConnectionGetInfoAppendString(struct ArrowArray* array, - uint32_t info_code, - const char* info_value, - struct AdbcError* error); -AdbcStatusCode AdbcConnectionGetInfoAppendInt(struct ArrowArray* array, - uint32_t info_code, int64_t info_value, - struct AdbcError* error); - -AdbcStatusCode AdbcInitConnectionObjectsSchema(struct ArrowSchema* schema, - struct AdbcError* error); -/// @} - struct AdbcGetObjectsUsage { struct ArrowStringView fk_catalog; struct ArrowStringView fk_db_schema; diff --git a/c/driver/framework/CMakeLists.txt b/c/driver/framework/CMakeLists.txt new file mode 100644 index 0000000000..3bd2f94e1e --- /dev/null +++ b/c/driver/framework/CMakeLists.txt @@ -0,0 +1,44 @@ +# Licensed to the Apache Software Foundation (ASF) under one +# or more contributor license agreements. See the NOTICE file +# distributed with this work for additional information +# regarding copyright ownership. The ASF licenses this file +# to you under the Apache License, Version 2.0 (the +# "License"); you may not use this file except in compliance +# with the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, +# software distributed under the License is distributed on an +# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +# KIND, either express or implied. See the License for the +# specific language governing permissions and limitations +# under the License. + +include(FetchContent) + +add_library(adbc_driver_framework STATIC catalog.cc objects.cc) +adbc_configure_target(adbc_driver_framework) +set_target_properties(adbc_driver_framework PROPERTIES POSITION_INDEPENDENT_CODE ON) +target_include_directories(adbc_driver_framework + PRIVATE "${REPOSITORY_ROOT}" "${REPOSITORY_ROOT}/c/" + "${REPOSITORY_ROOT}/c/vendor") +target_link_libraries(adbc_driver_framework PUBLIC adbc_driver_common fmt::fmt) + +# if(ADBC_BUILD_TESTS) +# add_test_case(driver_framework_test +# PREFIX +# adbc +# EXTRA_LABELS +# driver-framework +# SOURCES +# utils_test.cc +# driver_test.cc +# EXTRA_LINK_LIBS +# adbc_driver_framework +# nanoarrow) +# target_compile_features(adbc-driver-framework-test PRIVATE cxx_std_17) +# target_include_directories(adbc-driver-framework-test +# PRIVATE "${REPOSITORY_ROOT}" "${REPOSITORY_ROOT}/c/vendor") +# adbc_configure_target(adbc-driver-framework-test) +# endif() diff --git a/c/driver/framework/base.h b/c/driver/framework/base.h new file mode 100644 index 0000000000..ecb0865c02 --- /dev/null +++ b/c/driver/framework/base.h @@ -0,0 +1,696 @@ +// Licensed to the Apache Software Foundation (ASF) under one +// or more contributor license agreements. See the NOTICE file +// distributed with this work for additional information +// regarding copyright ownership. The ASF licenses this file +// to you under the Apache License, Version 2.0 (the +// "License"); you may not use this file except in compliance +// with the License. You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, +// software distributed under the License is distributed on an +// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +// KIND, either express or implied. See the License for the +// specific language governing permissions and limitations +// under the License. + +#pragma once + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +#include "driver/common/utils.h" +#include "driver/framework/status.h" + +/// \file driver.h ADBC Driver Framework +/// +/// A base implementation of an ADBC driver that allows easier driver +/// development just by overriding functions. +namespace adbc::driver { + +/// \brief Track the state of a database/connection/statement. +enum class LifecycleState { + /// \brief New has been called but not Init. + kUninitialized, + /// \brief Init has been called. + kInitialized, +}; + +/// \brief A typed option value wrapper. It currently does not attempt +/// conversion (i.e., getting a double option as a string). +class Option { + public: + /// The option is unset. + struct NotFound {}; + // TODO: use NotFound instead of std::nullopt, and rename to Unset or something. + using Value = std::variant, std::vector, + int64_t, double>; + + Option() : value_(NotFound{}) {} + explicit Option(const char* value) + : value_(value ? std::make_optional(std::string(value)) : std::nullopt) {} + explicit Option(std::string value) : value_(std::move(value)) {} + explicit Option(std::vector value) : value_(std::move(value)) {} + explicit Option(double value) : value_(value) {} + explicit Option(int64_t value) : value_(value) {} + + const Value& value() const& { return value_; } + Value& value() && { return value_; } + + Result AsBool() const { + return std::visit( + [&](auto&& value) -> Result { + using T = std::decay_t; + if constexpr (std::is_same_v>) { + if (!value.has_value()) { + return status::InvalidArgument("Invalid boolean value (NULL)"); + } else if (*value == ADBC_OPTION_VALUE_ENABLED) { + return true; + } else if (*value == ADBC_OPTION_VALUE_DISABLED) { + return false; + } + return status::InvalidArgument("Invalid boolean value '{}'", *value); + } + return status::InvalidArgument("Value must be 'true' or 'false'"); + }, + value_); + } + + Result> AsString() const { + return std::visit( + [&](auto&& value) -> Result> { + using T = std::decay_t; + if constexpr (std::is_same_v>) { + return value; + } + return status::InvalidArgument("Value must be a string"); + }, + value_); + } + + private: + Value value_; + + // Methods used by trampolines to export option values in C below + friend class ObjectBase; + + AdbcStatusCode CGet(char* out, size_t* length) const { + // TODO: no way to return error + if (!out || !length) { + return ADBC_STATUS_INVALID_ARGUMENT; + } + return std::visit( + [&](auto&& value) { + using T = std::decay_t; + if constexpr (std::is_same_v>) { + if (!value) { + *length = 0; + return ADBC_STATUS_OK; + } + size_t value_size_with_terminator = value->size() + 1; + if (*length >= value_size_with_terminator) { + std::memcpy(out, value->data(), value->size()); + out[value->size()] = 0; + } + *length = value_size_with_terminator; + return ADBC_STATUS_OK; + } else { + return ADBC_STATUS_NOT_FOUND; + } + }, + value_); + } + + AdbcStatusCode CGet(uint8_t* out, size_t* length) const { + if (!out || !length) { + return ADBC_STATUS_INVALID_ARGUMENT; + } + return std::visit( + [&](auto&& value) { + using T = std::decay_t; + if constexpr (std::is_same_v>) { + if (!value) { + *length = 0; + return ADBC_STATUS_OK; + } + size_t value_size_with_terminator = value->size() + 1; + if (*length >= value_size_with_terminator) { + std::memcpy(out, value->data(), value->size()); + out[value->size()] = 0; + } + *length = value_size_with_terminator; + return ADBC_STATUS_OK; + } else if constexpr (std::is_same_v>) { + if (*length >= value.size()) { + std::memcpy(out, value.data(), value.size()); + } + *length = value.size(); + return ADBC_STATUS_OK; + } else { + return ADBC_STATUS_NOT_FOUND; + } + }, + value_); + } + + AdbcStatusCode CGet(int64_t* out) const { + if (!out) { + return ADBC_STATUS_INVALID_ARGUMENT; + } + return std::visit( + [&](auto&& value) { + using T = std::decay_t; + if constexpr (std::is_same_v) { + *out = value; + return ADBC_STATUS_OK; + } else { + return ADBC_STATUS_NOT_FOUND; + } + }, + value_); + } + + AdbcStatusCode CGet(double* out) const { + if (!out) { + return ADBC_STATUS_INVALID_ARGUMENT; + } + return std::visit( + [&](auto&& value) { + using T = std::decay_t; + if constexpr (std::is_same_v || std::is_same_v) { + *out = value; + return ADBC_STATUS_OK; + } else { + return ADBC_STATUS_NOT_FOUND; + } + }, + value_); + } +}; + +// Base class for private_data of AdbcDatabase, AdbcConnection, and AdbcStatement +// This class handles option setting and getting. +class ObjectBase { + public: + ObjectBase() {} + + virtual ~ObjectBase() = default; + + // Called After zero or more SetOption() calls. The parent is the + // private_data of the AdbcDatabase, or AdbcConnection when initializing a + // subclass of ConnectionObjectBase, and StatementObjectBase (respectively), + // or otherwise nullptr. For example, if you have defined + // Driver, you can + // reinterpret_cast(parent) in MyConnection::Init(). + virtual AdbcStatusCode Init(void* parent, AdbcError* error) { return ADBC_STATUS_OK; } + + // Called when the corresponding AdbcXXXRelease() function is invoked from C. + // Driver authors can override this method to return an error if the object is + // not in a valid state (e.g., if a connection has open statements) or to clean + // up resources when resource cleanup could fail. Resource cleanup that cannot fail + // (e.g., releasing memory) should generally be handled in the deleter. + virtual AdbcStatusCode Release(AdbcError* error) { return ADBC_STATUS_OK; } + + // Get an option value. + virtual Result> GetOption(std::string_view key) const { + return std::nullopt; + } + + // Driver authors can override this method to reject options that are not supported or + // that are set at a time not supported by the driver (e.g., to reject options that are + // set after Init() is called if this is not supported). + virtual AdbcStatusCode SetOption(std::string_view key, Option value, AdbcError* error) { + return ADBC_STATUS_NOT_IMPLEMENTED; + } + + private: + // Let the Driver use these to expose C callables wrapping option setters/getters + template + friend class Driver; + + template + AdbcStatusCode CSetOption(const char* key, T value, AdbcError* error) { + Option option(value); + return SetOption(key, std::move(option), error); + } + + AdbcStatusCode CSetOptionBytes(const char* key, const uint8_t* value, size_t length, + AdbcError* error) { + std::vector cppvalue(value, value + length); + Option option(std::move(cppvalue)); + return SetOption(key, std::move(option), error); + } + + template + AdbcStatusCode CGetOptionStringLike(const char* key, T* value, size_t* length, + AdbcError* error) const { + RAISE_RESULT(error, auto option, GetOption(key)); + if (option.has_value()) { + // TODO: pass error through + return option->CGet(value, length); + } else { + SetError(error, "option '%s' not found", key); + return ADBC_STATUS_NOT_FOUND; + } + } + + template + AdbcStatusCode CGetOptionNumeric(const char* key, T* value, AdbcError* error) const { + RAISE_RESULT(error, auto option, GetOption(key)); + if (option.has_value()) { + // TODO: pass error through + return option->CGet(value); + } else { + SetError(error, "option '%s' not found", key); + return ADBC_STATUS_NOT_FOUND; + } + } +}; + +/// Helper for below: given the ADBC type, pick the right driver type. +template +struct ResolveObjectTImpl {}; + +template +struct ResolveObjectTImpl { + using type = DatabaseT; +}; +template +struct ResolveObjectTImpl { + using type = ConnectionT; +}; +template +struct ResolveObjectTImpl { + using type = StatementT; +}; + +/// Helper for below: given the ADBC type, pick the right driver type. +template +using ResolveObjectT = + typename ResolveObjectTImpl::type; + +// Driver authors can declare a template specialization of the Driver class +// and use it to provide their driver init function. It is possible, but +// rarely useful, to subclass a driver. +template +class Driver { + public: + static AdbcStatusCode Init(int version, void* raw_driver, AdbcError* error) { + // TODO: support 1_0_0 + if (version != ADBC_VERSION_1_1_0) return ADBC_STATUS_NOT_IMPLEMENTED; + AdbcDriver* driver = (AdbcDriver*)raw_driver; + std::memset(driver, 0, sizeof(AdbcDriver)); + + // Driver lifecycle + driver->private_data = new Driver(); + driver->release = &CDriverRelease; + + // Driver functions + driver->ErrorGetDetailCount = &CErrorGetDetailCount; + driver->ErrorGetDetail = &CErrorGetDetail; + + // Database lifecycle + driver->DatabaseNew = &CNew; + driver->DatabaseInit = &CDatabaseInit; + driver->DatabaseRelease = &CRelease; + + // Database functions + driver->DatabaseSetOption = &CSetOption; + driver->DatabaseSetOptionBytes = &CSetOptionBytes; + driver->DatabaseSetOptionInt = &CSetOptionInt; + driver->DatabaseSetOptionDouble = &CSetOptionDouble; + driver->DatabaseGetOption = &CGetOption; + driver->DatabaseGetOptionBytes = &CGetOptionBytes; + driver->DatabaseGetOptionInt = &CGetOptionInt; + driver->DatabaseGetOptionDouble = &CGetOptionDouble; + + // Connection lifecycle + driver->ConnectionNew = &CNew; + driver->ConnectionInit = &CConnectionInit; + driver->ConnectionRelease = &CRelease; + + // Connection functions + driver->ConnectionSetOption = &CSetOption; + driver->ConnectionSetOptionBytes = &CSetOptionBytes; + driver->ConnectionSetOptionInt = &CSetOptionInt; + driver->ConnectionSetOptionDouble = &CSetOptionDouble; + driver->ConnectionGetOption = &CGetOption; + driver->ConnectionGetOptionBytes = &CGetOptionBytes; + driver->ConnectionGetOptionInt = &CGetOptionInt; + driver->ConnectionGetOptionDouble = &CGetOptionDouble; + driver->ConnectionCommit = &CConnectionCommit; + driver->ConnectionGetInfo = &CConnectionGetInfo; + driver->ConnectionGetObjects = &CConnectionGetObjects; + driver->ConnectionGetTableSchema = &CConnectionGetTableSchema; + driver->ConnectionGetTableTypes = &CConnectionGetTableTypes; + driver->ConnectionReadPartition = &CConnectionReadPartition; + driver->ConnectionRollback = &CConnectionRollback; + driver->ConnectionCancel = &CConnectionCancel; + driver->ConnectionGetStatistics = &CConnectionGetStatistics; + driver->ConnectionGetStatisticNames = &CConnectionGetStatisticNames; + + // Statement lifecycle + driver->StatementNew = &CStatementNew; + driver->StatementRelease = &CRelease; + + // Statement functions + driver->StatementSetOption = &CSetOption; + driver->StatementSetOptionBytes = &CSetOptionBytes; + driver->StatementSetOptionInt = &CSetOptionInt; + driver->StatementSetOptionDouble = &CSetOptionDouble; + driver->StatementGetOption = &CGetOption; + driver->StatementGetOptionBytes = &CGetOptionBytes; + driver->StatementGetOptionInt = &CGetOptionInt; + driver->StatementGetOptionDouble = &CGetOptionDouble; + + driver->StatementExecuteQuery = &CStatementExecuteQuery; + driver->StatementExecuteSchema = &CStatementExecuteSchema; + driver->StatementPrepare = &CStatementPrepare; + driver->StatementSetSqlQuery = &CStatementSetSqlQuery; + driver->StatementSetSubstraitPlan = &CStatementSetSubstraitPlan; + driver->StatementBind = &CStatementBind; + driver->StatementBindStream = &CStatementBindStream; + driver->StatementCancel = &CStatementCancel; + + return ADBC_STATUS_OK; + } + + // Driver trampolines + static AdbcStatusCode CDriverRelease(AdbcDriver* driver, AdbcError* error) { + auto driver_private = reinterpret_cast(driver->private_data); + delete driver_private; + driver->private_data = nullptr; + return ADBC_STATUS_OK; + } + + static int CErrorGetDetailCount(const AdbcError* error) { + if (error->vendor_code != ADBC_ERROR_VENDOR_CODE_PRIVATE_DATA) { + return 0; + } + + auto error_obj = reinterpret_cast(error->private_data); + return error_obj->CDetailCount(); + } + + static AdbcErrorDetail CErrorGetDetail(const AdbcError* error, int index) { + auto error_obj = reinterpret_cast(error->private_data); + return error_obj->CDetail(index); + } + + // Templatable trampolines + + template + static AdbcStatusCode CNew(T* obj, AdbcError* error) { + using ObjectT = ResolveObjectT; + auto private_data = new ObjectT(); + obj->private_data = private_data; + return ADBC_STATUS_OK; + } + + template + static AdbcStatusCode CRelease(T* obj, AdbcError* error) { + using ObjectT = ResolveObjectT; + if (obj == nullptr) return ADBC_STATUS_INVALID_STATE; + auto private_data = reinterpret_cast(obj->private_data); + if (private_data == nullptr) return ADBC_STATUS_INVALID_STATE; + AdbcStatusCode result = private_data->Release(error); + if (result != ADBC_STATUS_OK) { + return result; + } + + delete private_data; + obj->private_data = nullptr; + return ADBC_STATUS_OK; + } + + template + static AdbcStatusCode CSetOption(T* obj, const char* key, const char* value, + AdbcError* error) { + using ObjectT = ResolveObjectT; + auto private_data = reinterpret_cast(obj->private_data); + return private_data->template CSetOption<>(key, value, error); + } + + template + static AdbcStatusCode CSetOptionBytes(T* obj, const char* key, const uint8_t* value, + size_t length, AdbcError* error) { + using ObjectT = ResolveObjectT; + auto private_data = reinterpret_cast(obj->private_data); + return private_data->CSetOptionBytes(key, value, length, error); + } + + template + static AdbcStatusCode CSetOptionInt(T* obj, const char* key, int64_t value, + AdbcError* error) { + using ObjectT = ResolveObjectT; + auto private_data = reinterpret_cast(obj->private_data); + return private_data->template CSetOption<>(key, value, error); + } + + template + static AdbcStatusCode CSetOptionDouble(T* obj, const char* key, double value, + AdbcError* error) { + using ObjectT = ResolveObjectT; + auto private_data = reinterpret_cast(obj->private_data); + return private_data->template CSetOption<>(key, value, error); + } + + template + static AdbcStatusCode CGetOption(T* obj, const char* key, char* value, size_t* length, + AdbcError* error) { + using ObjectT = ResolveObjectT; + auto private_data = reinterpret_cast(obj->private_data); + return private_data->template CGetOptionStringLike<>(key, value, length, error); + } + + template + static AdbcStatusCode CGetOptionBytes(T* obj, const char* key, uint8_t* value, + size_t* length, AdbcError* error) { + using ObjectT = ResolveObjectT; + auto private_data = reinterpret_cast(obj->private_data); + return private_data->template CGetOptionStringLike<>(key, value, length, error); + } + + template + static AdbcStatusCode CGetOptionInt(T* obj, const char* key, int64_t* value, + AdbcError* error) { + using ObjectT = ResolveObjectT; + auto private_data = reinterpret_cast(obj->private_data); + return private_data->template CGetOptionNumeric<>(key, value, error); + } + + template + static AdbcStatusCode CGetOptionDouble(T* obj, const char* key, double* value, + AdbcError* error) { + using ObjectT = ResolveObjectT; + auto private_data = reinterpret_cast(obj->private_data); + return private_data->template CGetOptionNumeric<>(key, value, error); + } + // TODO: all trampolines need to check for database + + // Database trampolines + static AdbcStatusCode CDatabaseInit(AdbcDatabase* database, AdbcError* error) { + auto private_data = reinterpret_cast(database->private_data); + return private_data->Init(nullptr, error); + } + + // Connection trampolines + static AdbcStatusCode CConnectionInit(AdbcConnection* connection, + AdbcDatabase* database, AdbcError* error) { + auto private_data = reinterpret_cast(connection->private_data); + return private_data->Init(database->private_data, error); + } + + static AdbcStatusCode CConnectionCancel(AdbcConnection* connection, AdbcError* error) { + auto private_data = reinterpret_cast(connection->private_data); + return private_data->Cancel(error); + } + + static AdbcStatusCode CConnectionGetInfo(AdbcConnection* connection, + const uint32_t* info_codes, + size_t info_codes_length, + ArrowArrayStream* out, AdbcError* error) { + auto private_data = reinterpret_cast(connection->private_data); + return private_data->GetInfo(info_codes, info_codes_length, out, error); + } + + static AdbcStatusCode CConnectionGetObjects(AdbcConnection* connection, int depth, + const char* catalog, const char* db_schema, + const char* table_name, + const char** table_type, + const char* column_name, + ArrowArrayStream* out, AdbcError* error) { + auto private_data = reinterpret_cast(connection->private_data); + return private_data->GetObjects(depth, catalog, db_schema, table_name, table_type, + column_name, out, error); + } + + static AdbcStatusCode CConnectionGetStatistics( + AdbcConnection* connection, const char* catalog, const char* db_schema, + const char* table_name, char approximate, ArrowArrayStream* out, AdbcError* error) { + auto private_data = reinterpret_cast(connection->private_data); + return private_data->GetStatistics(catalog, db_schema, table_name, approximate, out, + error); + } + + static AdbcStatusCode CConnectionGetStatisticNames(AdbcConnection* connection, + ArrowArrayStream* out, + AdbcError* error) { + auto private_data = reinterpret_cast(connection->private_data); + return private_data->GetStatisticNames(out, error); + } + + static AdbcStatusCode CConnectionGetTableSchema(AdbcConnection* connection, + const char* catalog, + const char* db_schema, + const char* table_name, + ArrowSchema* schema, AdbcError* error) { + auto private_data = reinterpret_cast(connection->private_data); + return private_data->GetTableSchema(catalog, db_schema, table_name, schema, error); + } + + static AdbcStatusCode CConnectionGetTableTypes(AdbcConnection* connection, + ArrowArrayStream* out, + AdbcError* error) { + auto private_data = reinterpret_cast(connection->private_data); + return private_data->GetTableTypes(out, error); + } + + static AdbcStatusCode CConnectionReadPartition(AdbcConnection* connection, + const uint8_t* serialized_partition, + size_t serialized_length, + ArrowArrayStream* out, + AdbcError* error) { + auto private_data = reinterpret_cast(connection->private_data); + return private_data->ReadPartition(serialized_partition, serialized_length, out, + error); + } + + static AdbcStatusCode CConnectionCommit(AdbcConnection* connection, AdbcError* error) { + auto private_data = reinterpret_cast(connection->private_data); + return private_data->Commit(error); + } + + static AdbcStatusCode CConnectionRollback(AdbcConnection* connection, + AdbcError* error) { + auto private_data = reinterpret_cast(connection->private_data); + return private_data->Rollback(error); + } + + // Statement trampolines + static AdbcStatusCode CStatementNew(AdbcConnection* connection, + AdbcStatement* statement, AdbcError* error) { + auto private_data = new StatementT(); + AdbcStatusCode status = private_data->Init(connection->private_data, error); + if (status != ADBC_STATUS_OK) { + delete private_data; + } + + statement->private_data = private_data; + return ADBC_STATUS_OK; + } + + static AdbcStatusCode CStatementExecutePartitions(AdbcStatement* statement, + struct ArrowSchema* schema, + struct AdbcPartitions* partitions, + int64_t* rows_affected, + AdbcError* error) { + auto private_data = reinterpret_cast(statement->private_data); + return private_data->ExecutePartitions(schema, partitions, rows_affected, error); + } + + static AdbcStatusCode CStatementExecuteQuery(AdbcStatement* statement, + ArrowArrayStream* stream, + int64_t* rows_affected, AdbcError* error) { + auto private_data = reinterpret_cast(statement->private_data); + return private_data->ExecuteQuery(stream, rows_affected, error); + } + + static AdbcStatusCode CStatementExecuteSchema(AdbcStatement* statement, + ArrowSchema* schema, AdbcError* error) { + auto private_data = reinterpret_cast(statement->private_data); + return private_data->ExecuteSchema(schema, error); + } + + static AdbcStatusCode CStatementGetParameterSchema(AdbcStatement* statement, + ArrowSchema* schema, + AdbcError* error) { + auto private_data = reinterpret_cast(statement->private_data); + return private_data->GetParameterSchema(schema, error); + } + + static AdbcStatusCode CStatementPrepare(AdbcStatement* statement, AdbcError* error) { + auto private_data = reinterpret_cast(statement->private_data); + return private_data->Prepare(error); + } + + static AdbcStatusCode CStatementSetSqlQuery(AdbcStatement* statement, const char* query, + AdbcError* error) { + auto private_data = reinterpret_cast(statement->private_data); + return private_data->SetSqlQuery(query, error); + } + + static AdbcStatusCode CStatementSetSubstraitPlan(AdbcStatement* statement, + const uint8_t* plan, size_t length, + AdbcError* error) { + auto private_data = reinterpret_cast(statement->private_data); + return private_data->SetSubstraitPlan(plan, length, error); + } + + static AdbcStatusCode CStatementBind(AdbcStatement* statement, ArrowArray* values, + ArrowSchema* schema, AdbcError* error) { + auto private_data = reinterpret_cast(statement->private_data); + return private_data->Bind(values, schema, error); + } + + static AdbcStatusCode CStatementBindStream(AdbcStatement* statement, + ArrowArrayStream* stream, AdbcError* error) { + auto private_data = reinterpret_cast(statement->private_data); + return private_data->BindStream(stream, error); + } + + static AdbcStatusCode CStatementCancel(AdbcStatement* statement, AdbcError* error) { + auto private_data = reinterpret_cast(statement->private_data); + return private_data->Cancel(error); + } +}; + +} // namespace adbc::driver + +template <> +struct fmt::formatter : fmt::nested_formatter { + auto format(const adbc::driver::Option& option, fmt::format_context& ctx) { + return write_padded(ctx, [=](auto out) { + return std::visit( + [&](auto&& value) { + using T = std::decay_t; + if constexpr (std::is_same_v) { + return fmt::format_to(out, "(missing option)"); + } else if constexpr (std::is_same_v>) { + if (value) { + return fmt::format_to(out, "'{}'", *value); + } else { + return fmt::format_to(out, "(NULL)"); + } + } else if constexpr (std::is_same_v>) { + return fmt::format_to(out, "({} bytes)", value.size()); + } else { + return fmt::format_to(out, "{}", value); + } + }, + option.value()); + }); + } +}; diff --git a/c/driver/framework/base_connection.h b/c/driver/framework/base_connection.h new file mode 100644 index 0000000000..2a763eceac --- /dev/null +++ b/c/driver/framework/base_connection.h @@ -0,0 +1,308 @@ +// Licensed to the Apache Software Foundation (ASF) under one +// or more contributor license agreements. See the NOTICE file +// distributed with this work for additional information +// regarding copyright ownership. The ASF licenses this file +// to you under the Apache License, Version 2.0 (the +// "License"); you may not use this file except in compliance +// with the License. You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, +// software distributed under the License is distributed on an +// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +// KIND, either express or implied. See the License for the +// specific language governing permissions and limitations +// under the License. + +#pragma once + +#include +#include +#include +#include +#include + +#include +#include +#include + +#include "driver/common/options.h" +#include "driver/common/utils.h" +#include "driver/framework/base.h" +#include "driver/framework/catalog.h" +#include "driver/framework/objects.h" + +namespace adbc::driver { + +template +class ConnectionBase : public ObjectBase { + public: + using Base = ConnectionBase; + + enum class AutocommitState { + kAutocommit, + kTransaction, + }; + + ConnectionBase() : ObjectBase(), lifecycle_state_(LifecycleState::kUninitialized) {} + + AdbcStatusCode Init(void* parent, AdbcError* error) override { + lifecycle_state_ = LifecycleState::kInitialized; + if (auto status = impl().InitImpl(parent); !status.ok()) { + return status.ToAdbc(error); + } + return ObjectBase::Init(parent, error); + } + + AdbcStatusCode Cancel(AdbcError* error) { return ADBC_STATUS_NOT_IMPLEMENTED; } + + AdbcStatusCode Commit(AdbcError* error) { + switch (autocommit_) { + case AutocommitState::kAutocommit: + return status::InvalidState("{} No active transaction, cannot commit", + Derived::kErrorPrefix) + .ToAdbc(error); + case AutocommitState::kTransaction: + return impl().CommitImpl().ToAdbc(error); + } + assert(false); + return ADBC_STATUS_INTERNAL; + } + + AdbcStatusCode GetInfo(const uint32_t* info_codes, size_t info_codes_length, + ArrowArrayStream* out, AdbcError* error) { + std::vector codes(info_codes, info_codes + info_codes_length); + RAISE_RESULT(error, auto infos, impl().InfoImpl(codes)); + + nanoarrow::UniqueSchema schema; + nanoarrow::UniqueArray array; + RAISE_STATUS(error, AdbcInitConnectionGetInfoSchema(schema.get(), array.get())); + + for (const auto& info : infos) { + RAISE_STATUS( + error, + std::visit( + [&](auto&& value) -> Status { + using T = std::decay_t; + if constexpr (std::is_same_v) { + return AdbcConnectionGetInfoAppendString(array.get(), info.code, value); + } else if constexpr (std::is_same_v) { + return AdbcConnectionGetInfoAppendInt(array.get(), info.code, value); + } else { + static_assert(!sizeof(T), "info value type not implemented"); + } + return status::kOk; + }, + info.value)); + CHECK_NA(INTERNAL, ArrowArrayFinishElement(array.get()), error); + } + + struct ArrowError na_error = {0}; + CHECK_NA_DETAIL(INTERNAL, ArrowArrayFinishBuildingDefault(array.get(), &na_error), + &na_error, error); + return BatchToArrayStream(array.get(), schema.get(), out, error); + } + + AdbcStatusCode GetObjects(int depth, const char* catalog, const char* db_schema, + const char* table_name, const char** table_type, + const char* column_name, ArrowArrayStream* out, + AdbcError* error) { + const auto catalog_filter = + catalog ? std::make_optional(std::string_view(catalog)) : std::nullopt; + const auto schema_filter = + db_schema ? std::make_optional(std::string_view(db_schema)) : std::nullopt; + const auto table_filter = + table_name ? std::make_optional(std::string_view(table_name)) : std::nullopt; + const auto column_filter = + column_name ? std::make_optional(std::string_view(column_name)) : std::nullopt; + std::vector table_type_filter; + while (table_type && *table_type) { + if (*table_type) { + table_type_filter.push_back(std::string_view(*table_type)); + } + table_type++; + } + + RAISE_RESULT(error, auto helper, impl().GetObjectsImpl()); + // TODO: parse depth to an enum + nanoarrow::UniqueSchema schema; + nanoarrow::UniqueArray array; + RAISE_STATUS(error, BuildGetObjects(helper.get(), depth, catalog_filter, + schema_filter, table_filter, column_filter, + table_type_filter, schema.get(), array.get())); + // TODO: always call helper->Close even on error + RAISE_STATUS(error, helper->Close()); + return BatchToArrayStream(array.get(), schema.get(), out, error); + } + + Result> GetOption(std::string_view key) const override { + if (key == ADBC_CONNECTION_OPTION_AUTOCOMMIT) { + switch (autocommit_) { + case AutocommitState::kAutocommit: + return driver::Option(ADBC_OPTION_VALUE_ENABLED); + case AutocommitState::kTransaction: + return driver::Option(ADBC_OPTION_VALUE_DISABLED); + } + } else if (key == ADBC_CONNECTION_OPTION_CURRENT_CATALOG) { + // TODO: defer to impl + return driver::Option("main"); + } else if (key == ADBC_CONNECTION_OPTION_CURRENT_DB_SCHEMA) { + return driver::Option(); + } + return std::nullopt; + } + + AdbcStatusCode GetStatistics(const char* catalog, const char* db_schema, + const char* table_name, char approximate, + ArrowArrayStream* out, AdbcError* error) { + return ADBC_STATUS_NOT_IMPLEMENTED; + } + + AdbcStatusCode GetStatisticNames(ArrowArrayStream* out, AdbcError* error) { + return ADBC_STATUS_NOT_IMPLEMENTED; + } + + AdbcStatusCode GetTableSchema(const char* catalog, const char* db_schema, + const char* table_name, ArrowSchema* schema, + AdbcError* error) { + if (!table_name) { + return status::InvalidArgument("{} GetTableSchema: must provide table_name", + Derived::kErrorPrefix) + .ToAdbc(error); + } + std::memset(schema, 0, sizeof(*schema)); + std::optional catalog_param = + catalog ? std::make_optional(std::string_view(catalog)) : std::nullopt; + std::optional db_schema_param = + db_schema ? std::make_optional(std::string_view(db_schema)) : std::nullopt; + std::string_view table_name_param = table_name; + + return impl() + .GetTableSchemaImpl(catalog_param, db_schema_param, table_name_param, schema) + .ToAdbc(error); + } + + AdbcStatusCode GetTableTypes(ArrowArrayStream* out, AdbcError* error) { + RAISE_RESULT(error, std::vector table_types, impl().GetTableTypesImpl()); + + nanoarrow::UniqueArray array; + nanoarrow::UniqueSchema schema; + ArrowSchemaInit(schema.get()); + + CHECK_NA(INTERNAL, ArrowSchemaSetType(schema.get(), NANOARROW_TYPE_STRUCT), error); + CHECK_NA(INTERNAL, ArrowSchemaAllocateChildren(schema.get(), /*num_columns=*/1), + error); + ArrowSchemaInit(schema.get()->children[0]); + CHECK_NA(INTERNAL, + ArrowSchemaSetType(schema.get()->children[0], NANOARROW_TYPE_STRING), error); + CHECK_NA(INTERNAL, ArrowSchemaSetName(schema.get()->children[0], "table_type"), + error); + schema.get()->children[0]->flags &= ~ARROW_FLAG_NULLABLE; + + CHECK_NA(INTERNAL, ArrowArrayInitFromSchema(array.get(), schema.get(), NULL), error); + CHECK_NA(INTERNAL, ArrowArrayStartAppending(array.get()), error); + + for (std::string const& table_type : table_types) { + CHECK_NA( + INTERNAL, + ArrowArrayAppendString(array->children[0], ArrowCharView(table_type.c_str())), + error); + CHECK_NA(INTERNAL, ArrowArrayFinishElement(array.get()), error); + } + + CHECK_NA(INTERNAL, ArrowArrayFinishBuildingDefault(array.get(), NULL), error); + + return BatchToArrayStream(array.get(), schema.get(), out, error); + } + + AdbcStatusCode ReadPartition(const uint8_t* serialized_partition, + size_t serialized_length, ArrowArrayStream* out, + AdbcError* error) { + return ADBC_STATUS_NOT_IMPLEMENTED; + } + + AdbcStatusCode Release(AdbcError* error) override { + return impl().ReleaseImpl().ToAdbc(error); + } + + AdbcStatusCode Rollback(AdbcError* error) { + switch (autocommit_) { + case AutocommitState::kAutocommit: + return status::InvalidState("no active transaction, cannot rollback") + .ToAdbc(error); + case AutocommitState::kTransaction: + return impl().RollbackImpl().ToAdbc(error); + } + assert(false); + return ADBC_STATUS_INTERNAL; + } + + AdbcStatusCode SetOption(std::string_view key, Option value, + AdbcError* error) override { + return impl().SetOptionImpl(key, value).ToAdbc(error); + } + + Status CommitImpl() { return status::NotImplemented("Commit"); } + + Result> GetObjectsImpl() { + return std::make_unique(); + } + + Status GetTableSchemaImpl(std::optional catalog, + std::optional db_schema, + std::string_view table_name, ArrowSchema* schema) { + return status::NotImplemented("GetTableSchema"); + } + + Result> GetTableTypesImpl() { + return std::vector(); + } + + Result> InfoImpl(const std::vector& codes) { + return std::vector{}; + } + + Status InitImpl(void* parent) { return status::kOk; } + + Status ReleaseImpl() { return status::kOk; } + + Status RollbackImpl() { return status::NotImplemented("Rollback"); } + + Status SetOptionImpl(std::string_view key, Option value) { + if (key == ADBC_CONNECTION_OPTION_AUTOCOMMIT) { + UNWRAP_RESULT(auto enabled, value.AsBool()); + switch (autocommit_) { + case AutocommitState::kAutocommit: { + if (!enabled) { + UNWRAP_STATUS(impl().ToggleAutocommitImpl(false)); + autocommit_ = AutocommitState::kTransaction; + } + break; + } + case AutocommitState::kTransaction: { + if (enabled) { + UNWRAP_STATUS(impl().ToggleAutocommitImpl(true)); + autocommit_ = AutocommitState::kAutocommit; + } + break; + } + } + return status::kOk; + } + return status::NotImplemented("unknown connection option {}={}", key, value); + } + + Status ToggleAutocommitImpl(bool enable_autocommit) { + return status::NotImplemented("driver does not support changing autocommit"); + } + + protected: + AutocommitState autocommit_ = AutocommitState::kAutocommit; + LifecycleState lifecycle_state_; + + private: + Derived& impl() { return static_cast(*this); } +}; + +} // namespace adbc::driver diff --git a/c/driver/framework/base_database.h b/c/driver/framework/base_database.h new file mode 100644 index 0000000000..b29ca4e410 --- /dev/null +++ b/c/driver/framework/base_database.h @@ -0,0 +1,81 @@ +// Licensed to the Apache Software Foundation (ASF) under one +// or more contributor license agreements. See the NOTICE file +// distributed with this work for additional information +// regarding copyright ownership. The ASF licenses this file +// to you under the Apache License, Version 2.0 (the +// "License"); you may not use this file except in compliance +// with the License. You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, +// software distributed under the License is distributed on an +// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +// KIND, either express or implied. See the License for the +// specific language governing permissions and limitations +// under the License. + +#pragma once + +#include +#include + +#include + +#include "driver/framework/base.h" +#include "driver/framework/status.h" + +namespace adbc::driver { +/// \brief The CRTP base implementation of an AdbcDatabase. +/// +/// Derived should override and implement the Impl methods, but not others. +/// Overridden methods should defer to the superclass version at the end. +/// (The Base typedef is provided to make this easier.) Derived should also +/// define a constexpr static symbol called kErrorPrefix that is used to +/// construct error messages. +template +class DatabaseBase : public ObjectBase { + public: + using Base = DatabaseBase; + + DatabaseBase() : ObjectBase(), lifecycle_state_(LifecycleState::kUninitialized) {} + + /// \internal + AdbcStatusCode Init(void* parent, AdbcError* error) override { + lifecycle_state_ = LifecycleState::kInitialized; + if (auto status = impl().InitImpl(); !status.ok()) { + return status.ToAdbc(error); + } + return ObjectBase::Init(parent, error); + } + + /// \internal + AdbcStatusCode Release(AdbcError* error) override { + return impl().ReleaseImpl().ToAdbc(error); + } + + /// \internal + AdbcStatusCode SetOption(std::string_view key, Option value, + AdbcError* error) override { + return impl().SetOptionImpl(key, std::move(value)).ToAdbc(error); + } + + /// \brief Initialize the database. + virtual Status InitImpl() { return status::kOk; } + + /// \brief Release the database. + virtual Status ReleaseImpl() { return status::kOk; } + + /// \brief Set an option. May be called prior to InitImpl. + virtual Status SetOptionImpl(std::string_view key, Option value) { + return status::NotImplemented("{} Unknown database option {}={}", + Derived::kErrorPrefix, key, value); + } + + protected: + LifecycleState lifecycle_state_; + + private: + Derived& impl() { return static_cast(*this); } +}; +} // namespace adbc::driver diff --git a/c/driver/framework/base_statement.h b/c/driver/framework/base_statement.h new file mode 100644 index 0000000000..ed4331bfbd --- /dev/null +++ b/c/driver/framework/base_statement.h @@ -0,0 +1,379 @@ +// Licensed to the Apache Software Foundation (ASF) under one +// or more contributor license agreements. See the NOTICE file +// distributed with this work for additional information +// regarding copyright ownership. The ASF licenses this file +// to you under the Apache License, Version 2.0 (the +// "License"); you may not use this file except in compliance +// with the License. You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, +// software distributed under the License is distributed on an +// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +// KIND, either express or implied. See the License for the +// specific language governing permissions and limitations +// under the License. + +#pragma once + +#include +#include +#include +#include +#include +#include +#include + +#include "driver/common/options.h" +#include "driver/framework/base.h" +#include "driver/framework/status.h" + +namespace adbc::driver { + +/// One-value ArrowArrayStream used to unify the implementations of Bind +struct OneValueStream { + struct ArrowSchema schema; + struct ArrowArray array; + + static int GetSchema(struct ArrowArrayStream* self, struct ArrowSchema* out) { + OneValueStream* stream = static_cast(self->private_data); + return ArrowSchemaDeepCopy(&stream->schema, out); + } + static int GetNext(struct ArrowArrayStream* self, struct ArrowArray* out) { + OneValueStream* stream = static_cast(self->private_data); + *out = stream->array; + stream->array.release = nullptr; + return 0; + } + static const char* GetLastError(struct ArrowArrayStream* self) { return NULL; } + static void Release(struct ArrowArrayStream* self) { + OneValueStream* stream = static_cast(self->private_data); + if (stream->schema.release) { + stream->schema.release(&stream->schema); + stream->schema.release = nullptr; + } + if (stream->array.release) { + stream->array.release(&stream->array); + stream->array.release = nullptr; + } + delete stream; + self->release = nullptr; + } +}; + +/// \brief A base implementation of a statement. +template +class StatementBase : public ObjectBase { + public: + using Base = StatementBase; + + /// \brief What to do in ingestion when the table does not exist. + enum class TableDoesNotExist { + kCreate, + kFail, + }; + + /// \brief What to do in ingestion when the table already exists. + enum class TableExists { + kAppend, + kFail, + kReplace, + }; + + /// \brief Statement state: initialized with no set query. + struct EmptyState {}; + /// \brief Statement state: bulk ingestion. + struct IngestState { + std::optional target_catalog; + std::optional target_schema; + std::optional target_table; + bool temporary = false; + TableDoesNotExist table_does_not_exist_ = TableDoesNotExist::kCreate; + TableExists table_exists_ = TableExists::kFail; + }; + /// \brief Statement state: prepared statement. + struct PreparedState { + std::string query; + }; + /// \brief Statement state: ad-hoc query. + struct QueryState { + std::string query; + }; + /// \brief Statement state: one of the above. + using State = std::variant; + + StatementBase() : ObjectBase(), lifecycle_state_(LifecycleState::kUninitialized) { + std::memset(&bind_parameters_, 0, sizeof(bind_parameters_)); + } + + AdbcStatusCode Bind(ArrowArray* values, ArrowSchema* schema, AdbcError* error) { + if (!values || !values->release) { + return status::InvalidArgument("{} Bind: must provide non-NULL array", + Derived::kErrorPrefix) + .ToAdbc(error); + } else if (!schema || !schema->release) { + return status::InvalidArgument("{} Bind: must provide non-NULL stream", + Derived::kErrorPrefix) + .ToAdbc(error); + } + if (bind_parameters_.release) bind_parameters_.release(&bind_parameters_); + // Make a one-value stream + bind_parameters_.private_data = new OneValueStream{*schema, *values}; + bind_parameters_.get_schema = &OneValueStream::GetSchema; + bind_parameters_.get_next = &OneValueStream::GetNext; + bind_parameters_.get_last_error = &OneValueStream::GetLastError; + bind_parameters_.release = &OneValueStream::Release; + std::memset(values, 0, sizeof(*values)); + std::memset(schema, 0, sizeof(*schema)); + return ADBC_STATUS_OK; + } + + AdbcStatusCode BindStream(ArrowArrayStream* stream, AdbcError* error) { + if (!stream || !stream->release) { + return status::InvalidArgument("{} BindStream: must provide non-NULL stream", + Derived::kErrorPrefix) + .ToAdbc(error); + } + if (bind_parameters_.release) bind_parameters_.release(&bind_parameters_); + // Move stream + bind_parameters_ = *stream; + std::memset(stream, 0, sizeof(*stream)); + return ADBC_STATUS_OK; + } + + AdbcStatusCode Cancel(AdbcError* error) { return ADBC_STATUS_NOT_IMPLEMENTED; } + + AdbcStatusCode ExecutePartitions(struct ArrowSchema* schema, + struct AdbcPartitions* partitions, + int64_t* rows_affected, AdbcError* error) { + return ADBC_STATUS_NOT_IMPLEMENTED; + } + + AdbcStatusCode ExecuteQuery(ArrowArrayStream* stream, int64_t* rows_affected, + AdbcError* error) { + // TODO: we could introduce a state to track when we're in the middle of a + // query and prevent operations + return std::visit( + [&](auto&& state) -> AdbcStatusCode { + using T = std::decay_t; + if constexpr (std::is_same_v) { + return status::InvalidState( + "{} Cannot ExecuteQuery without setting the query", + Derived::kErrorPrefix) + .ToAdbc(error); + } else if constexpr (std::is_same_v) { + if (stream) { + return status::InvalidState("{} Cannot ingest with result set", + Derived::kErrorPrefix) + .ToAdbc(error); + } + RAISE_RESULT(error, int64_t rows, impl().ExecuteIngestImpl(state)); + if (rows_affected) { + *rows_affected = rows; + } + return ADBC_STATUS_OK; + } else if constexpr (std::is_same_v || + std::is_same_v) { + int64_t rows = 0; + if (stream) { + RAISE_RESULT(error, rows, impl().ExecuteQueryImpl(state, stream)); + } else { + RAISE_RESULT(error, rows, impl().ExecuteUpdateImpl(state)); + } + if (rows_affected) { + *rows_affected = rows; + } + return ADBC_STATUS_OK; + } else { + static_assert(!sizeof(T), "case not implemented"); + } + }, + state_); + } + + AdbcStatusCode ExecuteSchema(ArrowSchema* schema, AdbcError* error) { + return ADBC_STATUS_NOT_IMPLEMENTED; + } + + AdbcStatusCode GetParameterSchema(struct ArrowSchema* schema, struct AdbcError* error) { + return ADBC_STATUS_NOT_IMPLEMENTED; + } + + AdbcStatusCode Init(void* parent, AdbcError* error) { + lifecycle_state_ = LifecycleState::kInitialized; + if (auto status = impl().InitImpl(parent); !status.ok()) { + return status.ToAdbc(error); + } + return ObjectBase::Init(parent, error); + } + + AdbcStatusCode Prepare(AdbcError* error) { + RAISE_STATUS(error, std::visit( + [&](auto&& state) -> Status { + using T = std::decay_t; + if constexpr (std::is_same_v) { + return status::InvalidState( + "{} Cannot Prepare without setting the query", + Derived::kErrorPrefix); + } else if constexpr (std::is_same_v) { + return status::InvalidState( + "{} Cannot Prepare without setting the query", + Derived::kErrorPrefix); + } else if constexpr (std::is_same_v) { + // No-op + return status::kOk; + } else if constexpr (std::is_same_v) { + UNWRAP_STATUS(impl().PrepareImpl(state)); + state_ = PreparedState{std::move(state.query)}; + return status::kOk; + } else { + static_assert(!sizeof(T), "case not implemented"); + } + }, + state_)); + return ADBC_STATUS_OK; + } + + AdbcStatusCode Release(AdbcError* error) { + if (bind_parameters_.release) { + bind_parameters_.release(&bind_parameters_); + bind_parameters_.release = nullptr; + } + return impl().ReleaseImpl().ToAdbc(error); + } + + AdbcStatusCode SetOption(std::string_view key, Option value, AdbcError* error) { + auto ensure_ingest = [&]() -> IngestState& { + if (!std::holds_alternative(state_)) { + state_ = IngestState{}; + } + return std::get(state_); + }; + if (key == ADBC_INGEST_OPTION_MODE) { + RAISE_RESULT(error, auto mode, value.AsString()); + if (mode == ADBC_INGEST_OPTION_MODE_APPEND) { + auto& state = ensure_ingest(); + state.table_does_not_exist_ = TableDoesNotExist::kFail; + state.table_exists_ = TableExists::kAppend; + } else if (mode == ADBC_INGEST_OPTION_MODE_CREATE) { + auto& state = ensure_ingest(); + state.table_does_not_exist_ = TableDoesNotExist::kCreate; + state.table_exists_ = TableExists::kFail; + } else if (mode == ADBC_INGEST_OPTION_MODE_CREATE_APPEND) { + auto& state = ensure_ingest(); + state.table_does_not_exist_ = TableDoesNotExist::kCreate; + state.table_exists_ = TableExists::kAppend; + } else if (mode == ADBC_INGEST_OPTION_MODE_REPLACE) { + auto& state = ensure_ingest(); + state.table_does_not_exist_ = TableDoesNotExist::kCreate; + state.table_exists_ = TableExists::kReplace; + } else { + return status::InvalidArgument("{} Invalid ingest mode '{}'", + Derived::kErrorPrefix, key, value) + .ToAdbc(error); + } + return ADBC_STATUS_OK; + } else if (key == ADBC_INGEST_OPTION_TARGET_CATALOG) { + RAISE_RESULT(error, auto catalog, value.AsString()); + ensure_ingest().target_catalog = catalog; + return ADBC_STATUS_OK; + } else if (key == ADBC_INGEST_OPTION_TARGET_DB_SCHEMA) { + RAISE_RESULT(error, auto schema, value.AsString()); + ensure_ingest().target_schema = schema; + return ADBC_STATUS_OK; + } else if (key == ADBC_INGEST_OPTION_TARGET_TABLE) { + RAISE_RESULT(error, auto table, value.AsString()); + ensure_ingest().target_table = table; + return ADBC_STATUS_OK; + } else if (key == ADBC_INGEST_OPTION_TEMPORARY) { + RAISE_RESULT(error, auto temporary, value.AsBool()); + ensure_ingest().temporary = temporary; + return ADBC_STATUS_OK; + } + return impl().SetOptionImpl(key, value).ToAdbc(error); + } + + AdbcStatusCode SetSqlQuery(const char* query, AdbcError* error) { + RAISE_STATUS(error, std::visit( + [&](auto&& state) -> Status { + using T = std::decay_t; + if constexpr (std::is_same_v) { + state_ = QueryState{ + std::string(query), + }; + return status::kOk; + } else if constexpr (std::is_same_v) { + state_ = QueryState{ + std::string(query), + }; + return status::kOk; + } else if constexpr (std::is_same_v) { + state_ = QueryState{ + std::string(query), + }; + return status::kOk; + } else if constexpr (std::is_same_v) { + state.query = std::string(query); + return status::kOk; + } else { + static_assert(!sizeof(T), + "info value type not implemented"); + } + }, + state_)); + return ADBC_STATUS_OK; + } + + AdbcStatusCode SetSubstraitPlan(const uint8_t* plan, size_t length, AdbcError* error) { + return ADBC_STATUS_NOT_IMPLEMENTED; + } + + Result ExecuteIngestImpl(IngestState& state) { + return status::NotImplemented("{} Bulk ingest is not implemented", + Derived::kErrorPrefix); + } + + Result ExecuteQueryImpl(PreparedState& state, ArrowArrayStream* stream) { + return status::NotImplemented("{} ExecuteQuery is not implemented", + Derived::kErrorPrefix); + } + + Result ExecuteQueryImpl(QueryState& state, ArrowArrayStream* stream) { + return status::NotImplemented("{} ExecuteQuery is not implemented", + Derived::kErrorPrefix); + } + + Result ExecuteUpdateImpl(PreparedState& state) { + return status::NotImplemented("{} ExecuteQuery (update) is not implemented", + Derived::kErrorPrefix); + } + + Result ExecuteUpdateImpl(QueryState& state) { + return status::NotImplemented("{} ExecuteQuery (update) is not implemented", + Derived::kErrorPrefix); + } + + Status InitImpl(void* parent) { return status::kOk; } + + Status PrepareImpl(QueryState& state) { + return status::NotImplemented("{} Prepare is not implemented", Derived::kErrorPrefix); + } + + Status ReleaseImpl() { return status::kOk; } + + Status SetOptionImpl(std::string_view key, Option value) { + return status::NotImplemented("{} Unknown statement option {}={}", + Derived::kErrorPrefix, key, value); + } + + protected: + LifecycleState lifecycle_state_; + ArrowArrayStream bind_parameters_; + + private: + State state_ = State(EmptyState{}); + Derived& impl() { return static_cast(*this); } +}; + +} // namespace adbc::driver diff --git a/c/driver/framework/catalog.cc b/c/driver/framework/catalog.cc new file mode 100644 index 0000000000..5c5b791e49 --- /dev/null +++ b/c/driver/framework/catalog.cc @@ -0,0 +1,263 @@ +// Licensed to the Apache Software Foundation (ASF) under one +// or more contributor license agreements. See the NOTICE file +// distributed with this work for additional information +// regarding copyright ownership. The ASF licenses this file +// to you under the Apache License, Version 2.0 (the +// "License"); you may not use this file except in compliance +// with the License. You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, +// software distributed under the License is distributed on an +// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +// KIND, either express or implied. See the License for the +// specific language governing permissions and limitations +// under the License. + +#include "driver/framework/catalog.h" + +#include + +namespace adbc::driver { +Status AdbcInitConnectionGetInfoSchema(struct ArrowSchema* schema, + struct ArrowArray* array) { + ArrowSchemaInit(schema); + UNWRAP_ERRNO(Internal, ArrowSchemaSetTypeStruct(schema, /*num_columns=*/2)); + + UNWRAP_ERRNO(Internal, ArrowSchemaSetType(schema->children[0], NANOARROW_TYPE_UINT32)); + UNWRAP_ERRNO(Internal, ArrowSchemaSetName(schema->children[0], "info_name")); + schema->children[0]->flags &= ~ARROW_FLAG_NULLABLE; + + struct ArrowSchema* info_value = schema->children[1]; + UNWRAP_ERRNO(Internal, + ArrowSchemaSetTypeUnion(info_value, NANOARROW_TYPE_DENSE_UNION, 6)); + UNWRAP_ERRNO(Internal, ArrowSchemaSetName(info_value, "info_value")); + + UNWRAP_ERRNO(Internal, + ArrowSchemaSetType(info_value->children[0], NANOARROW_TYPE_STRING)); + UNWRAP_ERRNO(Internal, ArrowSchemaSetName(info_value->children[0], "string_value")); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetType(info_value->children[1], NANOARROW_TYPE_BOOL)); + UNWRAP_ERRNO(Internal, ArrowSchemaSetName(info_value->children[1], "bool_value")); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetType(info_value->children[2], NANOARROW_TYPE_INT64)); + UNWRAP_ERRNO(Internal, ArrowSchemaSetName(info_value->children[2], "int64_value")); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetType(info_value->children[3], NANOARROW_TYPE_INT32)); + UNWRAP_ERRNO(Internal, ArrowSchemaSetName(info_value->children[3], "int32_bitmask")); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetType(info_value->children[4], NANOARROW_TYPE_LIST)); + UNWRAP_ERRNO(Internal, ArrowSchemaSetName(info_value->children[4], "string_list")); + UNWRAP_ERRNO(Internal, ArrowSchemaSetType(info_value->children[5], NANOARROW_TYPE_MAP)); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetName(info_value->children[5], "int32_to_int32_list_map")); + + UNWRAP_ERRNO(Internal, ArrowSchemaSetType(info_value->children[4]->children[0], + NANOARROW_TYPE_STRING)); + + UNWRAP_ERRNO(Internal, + ArrowSchemaSetType(info_value->children[5]->children[0]->children[0], + NANOARROW_TYPE_INT32)); + info_value->children[5]->children[0]->children[0]->flags &= ~ARROW_FLAG_NULLABLE; + UNWRAP_ERRNO(Internal, + ArrowSchemaSetType(info_value->children[5]->children[0]->children[1], + NANOARROW_TYPE_LIST)); + UNWRAP_ERRNO( + Internal, + ArrowSchemaSetType(info_value->children[5]->children[0]->children[1]->children[0], + NANOARROW_TYPE_INT32)); + + struct ArrowError na_error = {0}; + UNWRAP_NANOARROW(na_error, Internal, + ArrowArrayInitFromSchema(array, schema, &na_error)); + UNWRAP_ERRNO(Internal, ArrowArrayStartAppending(array)); + + return status::kOk; +} + +Status AdbcConnectionGetInfoAppendString(struct ArrowArray* array, uint32_t info_code, + std::string_view info_value) { + UNWRAP_ERRNO(Internal, ArrowArrayAppendUInt(array->children[0], info_code)); + // Append to type variant + struct ArrowStringView value; + value.data = info_value.data(); + value.size_bytes = static_cast(info_value.size()); + UNWRAP_ERRNO(Internal, ArrowArrayAppendString(array->children[1]->children[0], value)); + // Append type code/offset + UNWRAP_ERRNO(Internal, ArrowArrayFinishUnionElement(array->children[1], /*type_id=*/0)); + return status::kOk; +} + +Status AdbcConnectionGetInfoAppendInt(struct ArrowArray* array, uint32_t info_code, + int64_t info_value) { + UNWRAP_ERRNO(Internal, ArrowArrayAppendUInt(array->children[0], info_code)); + // Append to type variant + UNWRAP_ERRNO(Internal, + ArrowArrayAppendInt(array->children[1]->children[2], info_value)); + // Append type code/offset + UNWRAP_ERRNO(Internal, ArrowArrayFinishUnionElement(array->children[1], /*type_id=*/2)); + return status::kOk; +} + +Status AdbcInitConnectionObjectsSchema(struct ArrowSchema* schema) { + ArrowSchemaInit(schema); + UNWRAP_ERRNO(Internal, ArrowSchemaSetTypeStruct(schema, /*num_columns=*/2)); + UNWRAP_ERRNO(Internal, ArrowSchemaSetType(schema->children[0], NANOARROW_TYPE_STRING)); + UNWRAP_ERRNO(Internal, ArrowSchemaSetName(schema->children[0], "catalog_name")); + UNWRAP_ERRNO(Internal, ArrowSchemaSetType(schema->children[1], NANOARROW_TYPE_LIST)); + UNWRAP_ERRNO(Internal, ArrowSchemaSetName(schema->children[1], "catalog_db_schemas")); + UNWRAP_ERRNO(Internal, ArrowSchemaSetTypeStruct(schema->children[1]->children[0], 2)); + + struct ArrowSchema* db_schema_schema = schema->children[1]->children[0]; + UNWRAP_ERRNO(Internal, + ArrowSchemaSetType(db_schema_schema->children[0], NANOARROW_TYPE_STRING)); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetName(db_schema_schema->children[0], "db_schema_name")); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetType(db_schema_schema->children[1], NANOARROW_TYPE_LIST)); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetName(db_schema_schema->children[1], "db_schema_tables")); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetTypeStruct(db_schema_schema->children[1]->children[0], 4)); + + struct ArrowSchema* table_schema = db_schema_schema->children[1]->children[0]; + UNWRAP_ERRNO(Internal, + ArrowSchemaSetType(table_schema->children[0], NANOARROW_TYPE_STRING)); + UNWRAP_ERRNO(Internal, ArrowSchemaSetName(table_schema->children[0], "table_name")); + table_schema->children[0]->flags &= ~ARROW_FLAG_NULLABLE; + UNWRAP_ERRNO(Internal, + ArrowSchemaSetType(table_schema->children[1], NANOARROW_TYPE_STRING)); + UNWRAP_ERRNO(Internal, ArrowSchemaSetName(table_schema->children[1], "table_type")); + table_schema->children[1]->flags &= ~ARROW_FLAG_NULLABLE; + UNWRAP_ERRNO(Internal, + ArrowSchemaSetType(table_schema->children[2], NANOARROW_TYPE_LIST)); + UNWRAP_ERRNO(Internal, ArrowSchemaSetName(table_schema->children[2], "table_columns")); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetTypeStruct(table_schema->children[2]->children[0], 19)); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetType(table_schema->children[3], NANOARROW_TYPE_LIST)); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetName(table_schema->children[3], "table_constraints")); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetTypeStruct(table_schema->children[3]->children[0], 4)); + + struct ArrowSchema* column_schema = table_schema->children[2]->children[0]; + UNWRAP_ERRNO(Internal, + ArrowSchemaSetType(column_schema->children[0], NANOARROW_TYPE_STRING)); + UNWRAP_ERRNO(Internal, ArrowSchemaSetName(column_schema->children[0], "column_name")); + column_schema->children[0]->flags &= ~ARROW_FLAG_NULLABLE; + UNWRAP_ERRNO(Internal, + ArrowSchemaSetType(column_schema->children[1], NANOARROW_TYPE_INT32)); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetName(column_schema->children[1], "ordinal_position")); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetType(column_schema->children[2], NANOARROW_TYPE_STRING)); + UNWRAP_ERRNO(Internal, ArrowSchemaSetName(column_schema->children[2], "remarks")); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetType(column_schema->children[3], NANOARROW_TYPE_INT16)); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetName(column_schema->children[3], "xdbc_data_type")); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetType(column_schema->children[4], NANOARROW_TYPE_STRING)); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetName(column_schema->children[4], "xdbc_type_name")); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetType(column_schema->children[5], NANOARROW_TYPE_INT32)); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetName(column_schema->children[5], "xdbc_column_size")); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetType(column_schema->children[6], NANOARROW_TYPE_INT16)); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetName(column_schema->children[6], "xdbc_decimal_digits")); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetType(column_schema->children[7], NANOARROW_TYPE_INT16)); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetName(column_schema->children[7], "xdbc_num_prec_radix")); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetType(column_schema->children[8], NANOARROW_TYPE_INT16)); + UNWRAP_ERRNO(Internal, ArrowSchemaSetName(column_schema->children[8], "xdbc_nullable")); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetType(column_schema->children[9], NANOARROW_TYPE_STRING)); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetName(column_schema->children[9], "xdbc_column_def")); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetType(column_schema->children[10], NANOARROW_TYPE_INT16)); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetName(column_schema->children[10], "xdbc_sql_data_type")); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetType(column_schema->children[11], NANOARROW_TYPE_INT16)); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetName(column_schema->children[11], "xdbc_datetime_sub")); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetType(column_schema->children[12], NANOARROW_TYPE_INT32)); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetName(column_schema->children[12], "xdbc_char_octet_length")); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetType(column_schema->children[13], NANOARROW_TYPE_STRING)); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetName(column_schema->children[13], "xdbc_is_nullable")); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetType(column_schema->children[14], NANOARROW_TYPE_STRING)); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetName(column_schema->children[14], "xdbc_scope_catalog")); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetType(column_schema->children[15], NANOARROW_TYPE_STRING)); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetName(column_schema->children[15], "xdbc_scope_schema")); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetType(column_schema->children[16], NANOARROW_TYPE_STRING)); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetName(column_schema->children[16], "xdbc_scope_table")); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetType(column_schema->children[17], NANOARROW_TYPE_BOOL)); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetName(column_schema->children[17], "xdbc_is_autoincrement")); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetType(column_schema->children[18], NANOARROW_TYPE_BOOL)); + UNWRAP_ERRNO(Internal, ArrowSchemaSetName(column_schema->children[18], + "xdbc_is_generatedcolumn")); + + struct ArrowSchema* constraint_schema = table_schema->children[3]->children[0]; + UNWRAP_ERRNO(Internal, + ArrowSchemaSetType(constraint_schema->children[0], NANOARROW_TYPE_STRING)); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetName(constraint_schema->children[0], "constraint_name")); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetType(constraint_schema->children[1], NANOARROW_TYPE_STRING)); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetName(constraint_schema->children[1], "constraint_type")); + constraint_schema->children[1]->flags &= ~ARROW_FLAG_NULLABLE; + UNWRAP_ERRNO(Internal, + ArrowSchemaSetType(constraint_schema->children[2], NANOARROW_TYPE_LIST)); + UNWRAP_ERRNO(Internal, ArrowSchemaSetName(constraint_schema->children[2], + "constraint_column_names")); + UNWRAP_ERRNO(Internal, ArrowSchemaSetType(constraint_schema->children[2]->children[0], + NANOARROW_TYPE_STRING)); + constraint_schema->children[2]->flags &= ~ARROW_FLAG_NULLABLE; + UNWRAP_ERRNO(Internal, + ArrowSchemaSetType(constraint_schema->children[3], NANOARROW_TYPE_LIST)); + UNWRAP_ERRNO(Internal, ArrowSchemaSetName(constraint_schema->children[3], + "constraint_column_usage")); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetTypeStruct(constraint_schema->children[3]->children[0], 4)); + + struct ArrowSchema* usage_schema = constraint_schema->children[3]->children[0]; + UNWRAP_ERRNO(Internal, + ArrowSchemaSetType(usage_schema->children[0], NANOARROW_TYPE_STRING)); + UNWRAP_ERRNO(Internal, ArrowSchemaSetName(usage_schema->children[0], "fk_catalog")); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetType(usage_schema->children[1], NANOARROW_TYPE_STRING)); + UNWRAP_ERRNO(Internal, ArrowSchemaSetName(usage_schema->children[1], "fk_db_schema")); + UNWRAP_ERRNO(Internal, + ArrowSchemaSetType(usage_schema->children[2], NANOARROW_TYPE_STRING)); + UNWRAP_ERRNO(Internal, ArrowSchemaSetName(usage_schema->children[2], "fk_table")); + usage_schema->children[2]->flags &= ~ARROW_FLAG_NULLABLE; + UNWRAP_ERRNO(Internal, + ArrowSchemaSetType(usage_schema->children[3], NANOARROW_TYPE_STRING)); + UNWRAP_ERRNO(Internal, ArrowSchemaSetName(usage_schema->children[3], "fk_column_name")); + usage_schema->children[3]->flags &= ~ARROW_FLAG_NULLABLE; + + return status::kOk; +} +} // namespace adbc::driver diff --git a/c/driver/framework/catalog.h b/c/driver/framework/catalog.h new file mode 100644 index 0000000000..be868447ae --- /dev/null +++ b/c/driver/framework/catalog.h @@ -0,0 +1,145 @@ +// Licensed to the Apache Software Foundation (ASF) under one +// or more contributor license agreements. See the NOTICE file +// distributed with this work for additional information +// regarding copyright ownership. The ASF licenses this file +// to you under the Apache License, Version 2.0 (the +// "License"); you may not use this file except in compliance +// with the License. You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, +// software distributed under the License is distributed on an +// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +// KIND, either express or implied. See the License for the +// specific language governing permissions and limitations +// under the License. + +#pragma once + +#include +#include +#include +#include +#include +#include +#include + +#include + +#include "driver/framework/status.h" + +namespace adbc::driver { + +/// \defgroup adbc-framework-catalog Catalog Utilities +/// Utilities for implementing catalog/metadata-related functions. +/// +/// @{ + +/// \brief Helper to implement GetObjects. +struct GetObjectsHelper { + virtual ~GetObjectsHelper() = default; + + struct Table { + std::string_view name; + std::string_view type; + }; + + struct ColumnXdbc { + int16_t xdbc_data_type; + std::string_view xdbc_type_name; + int32_t xdbc_column_size; + int16_t xdbc_decimal_digits; + int16_t xdbc_num_prec_radix; + int16_t xdbc_nullable; + std::string_view xdbc_column_def; + int16_t xdbc_sql_data_type; + int16_t xdbc_datetime_sub; + int32_t xdbc_char_octet_length; + std::string_view xdbc_is_nullable; + std::string_view xdbc_scope_catalog; + std::string_view xdbc_scope_schema; + std::string_view xdbc_scope_table; + bool xdbc_is_autoincrement; + bool xdbc_is_generatedcolumn; + }; + + struct Column { + std::string_view column_name; + int32_t ordinal_position; + std::optional remarks; + std::optional xdbc; + }; + + struct ConstraintUsage { + std::optional catalog; + std::optional schema; + std::string_view table; + std::string_view column; + }; + + struct Constraint { + std::optional name; + std::string_view type; + std::vector column_names; + std::vector usage; + }; + + Status Close() { return status::kOk; } + + /// \brief Fetch all metadata needed. The driver is free to delay loading + /// but this gives it a chance to load data up front. + virtual Status Load(int depth, std::optional catalog_filter, + std::optional schema_filter, + std::optional table_filter, + std::optional column_filter, + std::vector table_types) { + return status::NotImplemented("GetObjects"); + } + + virtual Status LoadCatalogs() { + return status::NotImplemented("GetObjects at depth = catalog"); + }; + + virtual Result> NextCatalog() { return std::nullopt; } + + virtual Status LoadSchemas(std::string_view catalog) { + return status::NotImplemented("GetObjects at depth = schema"); + }; + + virtual Result> NextSchema() { return std::nullopt; } + + virtual Status LoadTables(std::string_view catalog, std::string_view schema) { + return status::NotImplemented("GetObjects at depth = table"); + }; + + virtual Result> NextTable() { return std::nullopt; } + + virtual Status LoadColumns(std::string_view catalog, std::string_view schema, + std::string_view table) { + return status::NotImplemented("GetObjects at depth = column"); + }; + + virtual Result> NextColumn() { return std::nullopt; } + + virtual Result> NextConstraint() { return std::nullopt; } +}; + +struct InfoValue { + uint32_t code; + std::variant value; + + explicit InfoValue(uint32_t code, std::variant value) + : code(code), value(std::move(value)) {} +}; + +Status AdbcInitConnectionGetInfoSchema(struct ArrowSchema* schema, + struct ArrowArray* array); +Status AdbcConnectionGetInfoAppendString(struct ArrowArray* array, uint32_t info_code, + std::string_view info_value); +Status AdbcConnectionGetInfoAppendInt(struct ArrowArray* array, uint32_t info_code, + int64_t info_value); +Status AdbcInitConnectionObjectsSchema(struct ArrowSchema* schema); +/// @} + +} // namespace adbc::driver diff --git a/c/driver/framework/objects.cc b/c/driver/framework/objects.cc new file mode 100644 index 0000000000..270517cadd --- /dev/null +++ b/c/driver/framework/objects.cc @@ -0,0 +1,304 @@ +// Licensed to the Apache Software Foundation (ASF) under one +// or more contributor license agreements. See the NOTICE file +// distributed with this work for additional information +// regarding copyright ownership. The ASF licenses this file +// to you under the Apache License, Version 2.0 (the +// "License"); you may not use this file except in compliance +// with the License. You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, +// software distributed under the License is distributed on an +// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +// KIND, either express or implied. See the License for the +// specific language governing permissions and limitations +// under the License. + +#include "driver/framework/objects.h" +#include + +#include "driver/framework/catalog.h" +#include "driver/framework/status.h" + +namespace adbc::driver { + +namespace { +ArrowStringView ToStringView(std::string_view s) { + return { + s.data(), + static_cast(s.size()), + }; +} + +struct GetObjectsBuilder { + GetObjectsBuilder(GetObjectsHelper* helper, int depth, + std::optional catalog_filter, + std::optional schema_filter, + std::optional table_filter, + std::optional column_filter, + const std::vector& table_types, + struct ArrowSchema* schema, struct ArrowArray* array) + : helper(helper), + depth(depth), + catalog_filter(catalog_filter), + schema_filter(schema_filter), + table_filter(table_filter), + column_filter(column_filter), + table_types(table_types), + schema(schema), + array(array) { + na_error = {0}; + } + + Status Build() { + UNWRAP_STATUS(InitArrowArray()); + UNWRAP_STATUS(helper->Load(depth, catalog_filter, schema_filter, table_filter, + column_filter, table_types)); + + catalog_name_col = array->children[0]; + catalog_db_schemas_col = array->children[1]; + catalog_db_schemas_items = catalog_db_schemas_col->children[0]; + db_schema_name_col = catalog_db_schemas_items->children[0]; + db_schema_tables_col = catalog_db_schemas_items->children[1]; + schema_table_items = db_schema_tables_col->children[0]; + table_name_col = schema_table_items->children[0]; + table_type_col = schema_table_items->children[1]; + + table_columns_col = schema_table_items->children[2]; + table_columns_items = table_columns_col->children[0]; + column_name_col = table_columns_items->children[0]; + column_position_col = table_columns_items->children[1]; + column_remarks_col = table_columns_items->children[2]; + + table_constraints_col = schema_table_items->children[3]; + table_constraints_items = table_constraints_col->children[0]; + constraint_name_col = table_constraints_items->children[0]; + constraint_type_col = table_constraints_items->children[1]; + + constraint_column_names_col = table_constraints_items->children[2]; + constraint_column_name_col = constraint_column_names_col->children[0]; + + constraint_column_usages_col = table_constraints_items->children[3]; + constraint_column_usage_items = constraint_column_usages_col->children[0]; + fk_catalog_col = constraint_column_usage_items->children[0]; + fk_db_schema_col = constraint_column_usage_items->children[1]; + fk_table_col = constraint_column_usage_items->children[2]; + fk_column_name_col = constraint_column_usage_items->children[3]; + + UNWRAP_STATUS(AppendCatalogs()); + return FinishArrowArray(); + } + + private: + Status InitArrowArray() { + UNWRAP_STATUS(AdbcInitConnectionObjectsSchema(schema)); + UNWRAP_NANOARROW(na_error, Internal, + ArrowArrayInitFromSchema(array, schema, &na_error)); + UNWRAP_ERRNO(Internal, ArrowArrayStartAppending(array)); + return status::kOk; + } + + Status AppendCatalogs() { + UNWRAP_STATUS(helper->LoadCatalogs()); + while (true) { + UNWRAP_RESULT(auto maybe_catalog, helper->NextCatalog()); + if (!maybe_catalog.has_value()) break; + + UNWRAP_ERRNO(Internal, ArrowArrayAppendString(catalog_name_col, + ToStringView(*maybe_catalog))); + if (depth == ADBC_OBJECT_DEPTH_CATALOGS) { + UNWRAP_ERRNO(Internal, ArrowArrayAppendNull(catalog_db_schemas_col, 1)); + } else { + UNWRAP_STATUS(AppendSchemas(*maybe_catalog)); + } + UNWRAP_ERRNO(Internal, ArrowArrayFinishElement(array)); + } + return status::kOk; + } + + Status AppendSchemas(std::string_view catalog) { + UNWRAP_STATUS(helper->LoadSchemas(catalog)); + while (true) { + UNWRAP_RESULT(auto maybe_schema, helper->NextSchema()); + if (!maybe_schema.has_value()) break; + + UNWRAP_ERRNO(Internal, ArrowArrayAppendString(db_schema_name_col, + ToStringView(*maybe_schema))); + + if (depth == ADBC_OBJECT_DEPTH_DB_SCHEMAS) { + UNWRAP_ERRNO(Internal, ArrowArrayAppendNull(db_schema_tables_col, 1)); + } else { + UNWRAP_STATUS(AppendTables(catalog, *maybe_schema)); + } + UNWRAP_ERRNO(Internal, ArrowArrayFinishElement(catalog_db_schemas_items)); + } + + UNWRAP_ERRNO(Internal, ArrowArrayFinishElement(catalog_db_schemas_col)); + return status::kOk; + } + + Status AppendTables(std::string_view catalog, std::string_view schema) { + UNWRAP_STATUS(helper->LoadTables(catalog, schema)); + while (true) { + UNWRAP_RESULT(auto maybe_table, helper->NextTable()); + if (!maybe_table.has_value()) break; + + UNWRAP_ERRNO(Internal, ArrowArrayAppendString(table_name_col, + ToStringView(maybe_table->name))); + UNWRAP_ERRNO(Internal, ArrowArrayAppendString(table_type_col, + ToStringView(maybe_table->type))); + if (depth == ADBC_OBJECT_DEPTH_TABLES) { + UNWRAP_ERRNO(Internal, ArrowArrayAppendNull(table_columns_col, 1)); + UNWRAP_ERRNO(Internal, ArrowArrayAppendNull(table_constraints_col, 1)); + } else { + UNWRAP_STATUS(AppendColumns(catalog, schema, maybe_table->name)); + UNWRAP_STATUS(AppendConstraints(catalog, schema, maybe_table->name)); + } + UNWRAP_ERRNO(Internal, ArrowArrayFinishElement(schema_table_items)); + } + + UNWRAP_ERRNO(Internal, ArrowArrayFinishElement(db_schema_tables_col)); + return status::kOk; + } + + Status AppendColumns(std::string_view catalog, std::string_view schema, + std::string_view table) { + UNWRAP_STATUS(helper->LoadColumns(catalog, schema, table)); + while (true) { + UNWRAP_RESULT(auto maybe_column, helper->NextColumn()); + if (!maybe_column.has_value()) break; + const auto& column = *maybe_column; + + UNWRAP_ERRNO(Internal, ArrowArrayAppendString(column_name_col, + ToStringView(column.column_name))); + UNWRAP_ERRNO(Internal, + ArrowArrayAppendInt(column_position_col, column.ordinal_position)); + if (column.remarks) { + UNWRAP_ERRNO(Internal, ArrowArrayAppendString(column_remarks_col, + ToStringView(*column.remarks))); + } else { + UNWRAP_ERRNO(Internal, ArrowArrayAppendNull(column_remarks_col, 1)); + } + + // TODO(lidavidm): no xdbc_ values for now + for (auto i = 3; i < 19; i++) { + UNWRAP_ERRNO(Internal, ArrowArrayAppendNull(table_columns_items->children[i], 1)); + } + UNWRAP_ERRNO(Internal, ArrowArrayFinishElement(table_columns_items)); + } + + UNWRAP_ERRNO(Internal, ArrowArrayFinishElement(table_columns_col)); + return status::kOk; + } + + Status AppendConstraints(std::string_view catalog, std::string_view schema, + std::string_view table) { + while (true) { + UNWRAP_RESULT(auto maybe_constraint, helper->NextConstraint()); + if (!maybe_constraint.has_value()) break; + const auto& constraint = *maybe_constraint; + // const char* constraint_name = row[0].data; + // const char* constraint_type = row[1].data; + + if (constraint.name) { + UNWRAP_ERRNO(Internal, ArrowArrayAppendString(constraint_name_col, + ToStringView(*constraint.name))); + } else { + UNWRAP_ERRNO(Internal, ArrowArrayAppendNull(constraint_name_col, 1)); + } + + UNWRAP_ERRNO(Internal, ArrowArrayAppendString(constraint_type_col, + ToStringView(constraint.type))); + + for (const auto& constraint_column_name : constraint.column_names) { + UNWRAP_ERRNO(Internal, + ArrowArrayAppendString(constraint_column_name_col, + ToStringView(constraint_column_name))); + } + UNWRAP_ERRNO(Internal, ArrowArrayFinishElement(constraint_column_names_col)); + + for (const auto& usage : constraint.usage) { + if (usage.catalog) { + UNWRAP_ERRNO(Internal, ArrowArrayAppendString(fk_catalog_col, + ToStringView(*usage.catalog))); + } else { + UNWRAP_ERRNO(Internal, ArrowArrayAppendNull(fk_catalog_col, 1)); + } + if (usage.schema) { + UNWRAP_ERRNO(Internal, ArrowArrayAppendString(fk_db_schema_col, + ToStringView(*usage.schema))); + } else { + UNWRAP_ERRNO(Internal, ArrowArrayAppendNull(fk_db_schema_col, 1)); + } + UNWRAP_ERRNO(Internal, + ArrowArrayAppendString(fk_table_col, ToStringView(usage.table))); + UNWRAP_ERRNO(Internal, ArrowArrayAppendString(fk_column_name_col, + ToStringView(usage.column))); + + UNWRAP_ERRNO(Internal, ArrowArrayFinishElement(constraint_column_usage_items)); + } + UNWRAP_ERRNO(Internal, ArrowArrayFinishElement(constraint_column_usages_col)); + UNWRAP_ERRNO(Internal, ArrowArrayFinishElement(table_constraints_items)); + } + + UNWRAP_ERRNO(Internal, ArrowArrayFinishElement(table_constraints_col)); + return status::kOk; + } + + Status FinishArrowArray() { + UNWRAP_NANOARROW(na_error, Internal, + ArrowArrayFinishBuildingDefault(array, &na_error)); + return status::kOk; + } + + GetObjectsHelper* helper; + int depth; + std::optional catalog_filter; + std::optional schema_filter; + std::optional table_filter; + std::optional column_filter; + const std::vector& table_types; + struct ArrowSchema* schema; + struct ArrowArray* array; + struct ArrowError na_error; + struct ArrowArray* catalog_name_col; + struct ArrowArray* catalog_db_schemas_col; + struct ArrowArray* catalog_db_schemas_items; + struct ArrowArray* db_schema_name_col; + struct ArrowArray* db_schema_tables_col; + struct ArrowArray* schema_table_items; + struct ArrowArray* table_name_col; + struct ArrowArray* table_type_col; + struct ArrowArray* table_columns_col; + struct ArrowArray* table_columns_items; + struct ArrowArray* column_name_col; + struct ArrowArray* column_position_col; + struct ArrowArray* column_remarks_col; + struct ArrowArray* table_constraints_col; + struct ArrowArray* table_constraints_items; + struct ArrowArray* constraint_name_col; + struct ArrowArray* constraint_type_col; + struct ArrowArray* constraint_column_names_col; + struct ArrowArray* constraint_column_name_col; + struct ArrowArray* constraint_column_usages_col; + struct ArrowArray* constraint_column_usage_items; + struct ArrowArray* fk_catalog_col; + struct ArrowArray* fk_db_schema_col; + struct ArrowArray* fk_table_col; + struct ArrowArray* fk_column_name_col; +}; +} // namespace + +Status BuildGetObjects(GetObjectsHelper* helper, int depth, + std::optional catalog_filter, + std::optional schema_filter, + std::optional table_filter, + std::optional column_filter, + const std::vector& table_types, + struct ArrowSchema* schema, struct ArrowArray* array) { + return GetObjectsBuilder(helper, depth, catalog_filter, schema_filter, table_filter, + column_filter, table_types, schema, array) + .Build(); +} +} // namespace adbc::driver diff --git a/c/driver/framework/objects.h b/c/driver/framework/objects.h new file mode 100644 index 0000000000..d350aea64c --- /dev/null +++ b/c/driver/framework/objects.h @@ -0,0 +1,39 @@ +// Licensed to the Apache Software Foundation (ASF) under one +// or more contributor license agreements. See the NOTICE file +// distributed with this work for additional information +// regarding copyright ownership. The ASF licenses this file +// to you under the Apache License, Version 2.0 (the +// "License"); you may not use this file except in compliance +// with the License. You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, +// software distributed under the License is distributed on an +// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +// KIND, either express or implied. See the License for the +// specific language governing permissions and limitations +// under the License. + +#pragma once + +#include +#include +#include + +#include + +#include "driver/framework/status.h" +#include "driver/framework/type_fwd.h" + +namespace adbc::driver { +/// \brief A helper that implements GetObjects. +/// The schema/array/helper lifetime are caller-managed. +Status BuildGetObjects(GetObjectsHelper* helper, int depth, + std::optional catalog_filter, + std::optional schema_filter, + std::optional table_filter, + std::optional column_filter, + const std::vector& table_types, + struct ArrowSchema* schema, struct ArrowArray* array); +} // namespace adbc::driver diff --git a/c/driver/framework/status.h b/c/driver/framework/status.h new file mode 100644 index 0000000000..6097ab3d7c --- /dev/null +++ b/c/driver/framework/status.h @@ -0,0 +1,253 @@ +// Licensed to the Apache Software Foundation (ASF) under one +// or more contributor license agreements. See the NOTICE file +// distributed with this work for additional information +// regarding copyright ownership. The ASF licenses this file +// to you under the Apache License, Version 2.0 (the +// "License"); you may not use this file except in compliance +// with the License. You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, +// software distributed under the License is distributed on an +// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +// KIND, either express or implied. See the License for the +// specific language governing permissions and limitations +// under the License. + +#pragma once + +#include +#include +#include +#include +#include +#include + +#include +#include + +namespace adbc::driver { + +/// \brief A wrapper around AdbcStatusCode + AdbcError. +/// +/// Drivers should prefer to use Status, and convert at the boundaries with +/// ToAdbc. +class Status { + public: + /// \brief Construct an OK status. + Status() : code_(ADBC_STATUS_OK) {} + + /// \brief Construct a non-OK status with a message. + explicit Status(AdbcStatusCode code, std::string message) + : Status(code, std::move(message), {}) {} + + /// \brief Construct a non-OK status with a message. + explicit Status(AdbcStatusCode code, const char* message) + : Status(code, std::string(message), {}) {} + + /// \brief Construct a non-OK status with a message and details. + explicit Status(AdbcStatusCode code, std::string message, + std::vector> details) + : code_(code), message_(std::move(message)), details_(std::move(details)) { + assert(code != ADBC_STATUS_OK); + std::memset(sql_state_, 0, sizeof(sql_state_)); + } + + bool ok() const { return code_ == ADBC_STATUS_OK; } + + /// \brief Add another error detail. + void AddDetail(std::string key, std::string value) { + details_.push_back({std::move(key), std::move(value)}); + } + + /// \brief Export this status to an AdbcError. + AdbcStatusCode ToAdbc(AdbcError* adbc_error) { + if (adbc_error == nullptr || code_ == ADBC_STATUS_OK) return code_; + + if (adbc_error->release) { + adbc_error->release(adbc_error); + } + + if (adbc_error->vendor_code == ADBC_ERROR_VENDOR_CODE_PRIVATE_DATA) { + auto error_owned_by_adbc_error = + new Status(code_, std::move(message_), std::move(details_)); + adbc_error->message = + const_cast(error_owned_by_adbc_error->message_.c_str()); + adbc_error->private_data = error_owned_by_adbc_error; + } else { + // TODO: use new/delete not malloc/free + adbc_error->message = reinterpret_cast(std::malloc(message_.size() + 1)); + if (adbc_error->message != nullptr) { + std::memcpy(adbc_error->message, message_.c_str(), message_.size() + 1); + } + } + + std::memcpy(adbc_error->sqlstate, sql_state_, sizeof(sql_state_)); + adbc_error->release = &CRelease; + return code_; + } + + static Status FromAdbc(AdbcStatusCode code, AdbcError& error) { + // not really meant to be used, just something we have for now while porting + if (code == ADBC_STATUS_OK) { + if (error.release) { + error.release(&error); + } + return Status(); + } + auto status = Status(code, error.message ? error.message : "(unknown error)"); + if (error.release) { + error.release(&error); + } + return status; + } + + private: + AdbcStatusCode code_; + // TODO: could reduce size by pimpling + std::string message_; + std::vector> details_; + char sql_state_[5]; + + // Let the Driver use these to expose C callables wrapping option setters/getters + template + friend class Driver; + + int CDetailCount() const { return details_.size(); } + + AdbcErrorDetail CDetail(int index) const { + const auto& detail = details_[index]; + return {detail.first.c_str(), reinterpret_cast(detail.second.data()), + detail.second.size() + 1}; + } + + static void CRelease(AdbcError* error) { + if (error->vendor_code == ADBC_ERROR_VENDOR_CODE_PRIVATE_DATA) { + auto* error_obj = reinterpret_cast(error->private_data); + delete error_obj; + std::memset(error, 0, ADBC_ERROR_1_1_0_SIZE); + } else { + std::free(error->message); + std::memset(error, 0, ADBC_ERROR_1_0_0_SIZE); + } + } +}; + +/// \brief +template +class Result { + public: + // We could probably do better by using a library like std::expected, but + // this will suffice for now + Result(Status s) // NOLINT(runtime/explicit) + : value_(std::move(s)) { + assert(!s.ok()); + } + // TODO: taken from upstream, document/explain this + template ::value && std::is_convertible::value && + !std::is_same::type>::type, + Status>::value>::type> + Result(U&& t) : value_(std::forward(t)) {} // NOLINT(runtime/explicit) + + bool has_value() const { return !std::holds_alternative(value_); } + Status status() const { + assert(std::holds_alternative(value_)); + return std::get(value_); + } + T& value() { + assert(!std::holds_alternative(value_)); + return std::get(value_); + } + + private: + std::variant value_; +}; + +#define RAISE_RESULT_IMPL(NAME, ERROR, LHS, RHS) \ + auto&& NAME = (RHS); \ + if (!(NAME).has_value()) { \ + return (NAME).status().ToAdbc(ERROR); \ + } \ + LHS = std::move((NAME).value()); + +#define RAISE_STATUS_IMPL(NAME, ERROR, RHS) \ + auto&& NAME = (RHS); \ + if (!(NAME).ok()) { \ + return (NAME).ToAdbc(ERROR); \ + } + +#define UNWRAP_RESULT_IMPL(name, lhs, rhs) \ + auto&& name = (rhs); \ + if (!(name).has_value()) { \ + return (name).status(); \ + } \ + lhs = std::move((name).value()); + +#define UNWRAP_STATUS_IMPL(name, rhs) \ + auto&& name = (rhs); \ + if (!(name).ok()) { \ + return (name); \ + } + +#define DRIVER_CONCAT(x, y) x##y +#define UNWRAP_RESULT_NAME(x, y) DRIVER_CONCAT(x, y) + +#define RAISE_RESULT(ERROR, LHS, RHS) \ + RAISE_RESULT_IMPL(UNWRAP_RESULT_NAME(driver_raise_result, __COUNTER__), ERROR, LHS, RHS) +#define RAISE_STATUS(ERROR, RHS) \ + RAISE_STATUS_IMPL(UNWRAP_RESULT_NAME(driver_raise_status, __COUNTER__), ERROR, RHS) +#define UNWRAP_RESULT(lhs, rhs) \ + UNWRAP_RESULT_IMPL(UNWRAP_RESULT_NAME(driver_unwrap_result, __COUNTER__), lhs, rhs) +#define UNWRAP_STATUS(rhs) \ + UNWRAP_STATUS_IMPL(UNWRAP_RESULT_NAME(driver_unwrap_status, __COUNTER__), rhs) + +} // namespace adbc::driver + +namespace adbc::driver::status { + +#define STATUS_CTOR(NAME, CODE) \ + template \ + static Status NAME(std::string_view format_string, Args&&... args) { \ + auto message = fmt::vformat(format_string, fmt::make_format_args(args...)); \ + return Status(ADBC_STATUS_##CODE, std::move(message)); \ + } + +// TODO: unit tests for internal utilities +STATUS_CTOR(Internal, INTERNAL) +STATUS_CTOR(InvalidArgument, INVALID_ARGUMENT) +STATUS_CTOR(InvalidState, INVALID_STATE) +STATUS_CTOR(IO, IO) +STATUS_CTOR(NotFound, NOT_FOUND) +STATUS_CTOR(NotImplemented, NOT_IMPLEMENTED) +STATUS_CTOR(Unknown, UNKNOWN) + +#undef STATUS_CTOR + +static inline driver::Status kOk; + +#define UNWRAP_ERRNO_IMPL(NAME, CODE, RHS) \ + auto&& NAME = (RHS); \ + if (NAME != 0) { \ + return adbc::driver::status::CODE("Nanoarrow call failed: {} = ({}) {}", #RHS, NAME, \ + std::strerror(NAME)); \ + } + +#define UNWRAP_ERRNO(CODE, RHS) \ + UNWRAP_ERRNO_IMPL(UNWRAP_RESULT_NAME(driver_errno, __COUNTER__), CODE, RHS) + +#define UNWRAP_NANOARROW_IMPL(NAME, ERROR, CODE, RHS) \ + auto&& NAME = (RHS); \ + if (NAME != 0) { \ + return adbc::driver::status::CODE("Nanoarrow call failed: {} = ({}) {}. {}", #RHS, \ + NAME, std::strerror(NAME), (ERROR).message); \ + } + +#define UNWRAP_NANOARROW(ERROR, CODE, RHS) \ + UNWRAP_NANOARROW_IMPL(UNWRAP_RESULT_NAME(driver_errno_na, __COUNTER__), ERROR, CODE, \ + RHS) + +} // namespace adbc::driver::status diff --git a/c/driver/framework/type_fwd.h b/c/driver/framework/type_fwd.h new file mode 100644 index 0000000000..a7428bd285 --- /dev/null +++ b/c/driver/framework/type_fwd.h @@ -0,0 +1,24 @@ +// Licensed to the Apache Software Foundation (ASF) under one +// or more contributor license agreements. See the NOTICE file +// distributed with this work for additional information +// regarding copyright ownership. The ASF licenses this file +// to you under the Apache License, Version 2.0 (the +// "License"); you may not use this file except in compliance +// with the License. You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, +// software distributed under the License is distributed on an +// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +// KIND, either express or implied. See the License for the +// specific language governing permissions and limitations +// under the License. + +#pragma once + +#include "driver/framework/status.h" + +namespace adbc::driver { +struct GetObjectsHelper; +} diff --git a/c/driver/postgresql/CMakeLists.txt b/c/driver/postgresql/CMakeLists.txt index 18eb773d6f..e8bbeac9e9 100644 --- a/c/driver/postgresql/CMakeLists.txt +++ b/c/driver/postgresql/CMakeLists.txt @@ -44,11 +44,13 @@ add_arrow_lib(adbc_driver_postgresql ${ADBC_LINK_FLAGS} SHARED_LINK_LIBS adbc_driver_common + adbc_driver_framework nanoarrow ${LIBPQ_LINK_LIBRARIES} STATIC_LINK_LIBS ${LIBPQ_LINK_LIBRARIES} adbc_driver_common + adbc_driver_framework nanoarrow ${LIBPQ_STATIC_LIBRARIES}) diff --git a/c/driver/postgresql/connection.cc b/c/driver/postgresql/connection.cc index 63d23fb296..5a6cdf2412 100644 --- a/c/driver/postgresql/connection.cc +++ b/c/driver/postgresql/connection.cc @@ -31,8 +31,9 @@ #include #include -#include "common/utils.h" #include "database.h" +#include "driver/common/utils.h" +#include "driver/framework/catalog.h" #include "error.h" #include "result_helper.h" @@ -108,7 +109,7 @@ class PqGetObjectsHelper { private: AdbcStatusCode InitArrowArray() { - RAISE_ADBC(AdbcInitConnectionObjectsSchema(schema_, error_)); + RAISE_ADBC(adbc::driver::AdbcInitConnectionObjectsSchema(schema_).ToAdbc(error_)); CHECK_NA_DETAIL(INTERNAL, ArrowArrayInitFromSchema(array_, schema_, &na_error_), &na_error_, error_); @@ -643,13 +644,14 @@ AdbcStatusCode PostgresConnection::Commit(struct AdbcError* error) { AdbcStatusCode PostgresConnection::PostgresConnectionGetInfoImpl( const uint32_t* info_codes, size_t info_codes_length, struct ArrowSchema* schema, struct ArrowArray* array, struct AdbcError* error) { - RAISE_ADBC(AdbcInitConnectionGetInfoSchema(schema, array, error)); + RAISE_ADBC(adbc::driver::AdbcInitConnectionGetInfoSchema(schema, array).ToAdbc(error)); for (size_t i = 0; i < info_codes_length; i++) { switch (info_codes[i]) { case ADBC_INFO_VENDOR_NAME: - RAISE_ADBC( - AdbcConnectionGetInfoAppendString(array, info_codes[i], "PostgreSQL", error)); + RAISE_ADBC(adbc::driver::AdbcConnectionGetInfoAppendString(array, info_codes[i], + "PostgreSQL") + .ToAdbc(error)); break; case ADBC_INFO_VENDOR_VERSION: { const char* stmt = "SHOW server_version_num"; @@ -663,26 +665,31 @@ AdbcStatusCode PostgresConnection::PostgresConnectionGetInfoImpl( } const char* server_version_num = (*it)[0].data; - RAISE_ADBC(AdbcConnectionGetInfoAppendString(array, info_codes[i], - server_version_num, error)); + RAISE_ADBC(adbc::driver::AdbcConnectionGetInfoAppendString(array, info_codes[i], + server_version_num) + .ToAdbc(error)); break; } case ADBC_INFO_DRIVER_NAME: - RAISE_ADBC(AdbcConnectionGetInfoAppendString(array, info_codes[i], - "ADBC PostgreSQL Driver", error)); + RAISE_ADBC(adbc::driver::AdbcConnectionGetInfoAppendString( + array, info_codes[i], "ADBC PostgreSQL Driver") + .ToAdbc(error)); break; case ADBC_INFO_DRIVER_VERSION: // TODO(lidavidm): fill in driver version - RAISE_ADBC( - AdbcConnectionGetInfoAppendString(array, info_codes[i], "(unknown)", error)); + RAISE_ADBC(adbc::driver::AdbcConnectionGetInfoAppendString(array, info_codes[i], + "(unknown)") + .ToAdbc(error)); break; case ADBC_INFO_DRIVER_ARROW_VERSION: - RAISE_ADBC(AdbcConnectionGetInfoAppendString(array, info_codes[i], - NANOARROW_VERSION, error)); + RAISE_ADBC(adbc::driver::AdbcConnectionGetInfoAppendString(array, info_codes[i], + NANOARROW_VERSION) + .ToAdbc(error)); break; case ADBC_INFO_DRIVER_ADBC_VERSION: - RAISE_ADBC(AdbcConnectionGetInfoAppendInt(array, info_codes[i], - ADBC_VERSION_1_1_0, error)); + RAISE_ADBC(adbc::driver::AdbcConnectionGetInfoAppendInt(array, info_codes[i], + ADBC_VERSION_1_1_0) + .ToAdbc(error)); break; default: // Ignore diff --git a/c/driver/sqlite/CMakeLists.txt b/c/driver/sqlite/CMakeLists.txt index 1f2c9f6d17..941329c2f0 100644 --- a/c/driver/sqlite/CMakeLists.txt +++ b/c/driver/sqlite/CMakeLists.txt @@ -27,7 +27,7 @@ endif() add_arrow_lib(adbc_driver_sqlite SOURCES - sqlite.c + sqlite.cc statement_reader.c OUTPUTS ADBC_LIBRARIES @@ -40,10 +40,12 @@ add_arrow_lib(adbc_driver_sqlite SHARED_LINK_LIBS ${SQLite3_LINK_LIBRARIES} adbc_driver_common + adbc_driver_framework nanoarrow STATIC_LINK_LIBS ${SQLite3_LINK_LIBRARIES} adbc_driver_common + adbc_driver_framework nanoarrow ${LIBPQ_STATIC_LIBRARIES}) diff --git a/c/driver/sqlite/sqlite.cc b/c/driver/sqlite/sqlite.cc new file mode 100644 index 0000000000..30054c0987 --- /dev/null +++ b/c/driver/sqlite/sqlite.cc @@ -0,0 +1,1415 @@ +// Licensed to the Apache Software Foundation (ASF) under one +// or more contributor license agreements. See the NOTICE file +// distributed with this work for additional information +// regarding copyright ownership. The ASF licenses this file +// to you under the Apache License, Version 2.0 (the +// "License"); you may not use this file except in compliance +// with the License. You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, +// software distributed under the License is distributed on an +// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +// KIND, either express or implied. See the License for the +// specific language governing permissions and limitations +// under the License. + +#include + +#include +#include +#include +#include + +#include "driver/common/options.h" +#include "driver/common/utils.h" +#include "driver/framework/base.h" +#include "driver/framework/base_connection.h" +#include "driver/framework/base_database.h" +#include "driver/framework/base_statement.h" +#include "driver/framework/status.h" +#include "driver/sqlite/statement_reader.h" +#include "driver/sqlite/types.h" + +namespace adbc::sqlite { + +using driver::Result; +using driver::Status; +namespace status = adbc::driver::status; + +namespace { +constexpr std::string_view kDefaultUri = + "file:adbc_driver_sqlite?mode=memory&cache=shared"; +constexpr std::string_view kConnectionOptionEnableLoadExtension = + "adbc.sqlite.load_extension.enabled"; +constexpr std::string_view kConnectionOptionLoadExtensionPath = + "adbc.sqlite.load_extension.path"; +constexpr std::string_view kConnectionOptionLoadExtensionEntrypoint = + "adbc.sqlite.load_extension.entrypoint"; +/// The batch size for query results (and for initial type inference) +// TODO: this needs a unit test +constexpr std::string_view kStatementOptionBatchRows = "adbc.sqlite.query.batch_rows"; + +std::string_view GetColumnText(sqlite3_stmt* stmt, int index) { + return { + reinterpret_cast(sqlite3_column_text(stmt, index)), + static_cast(sqlite3_column_bytes(stmt, index)), + }; +} + +class SqliteMutexGuard { + public: + explicit SqliteMutexGuard(sqlite3* conn) : conn_(conn) { + sqlite3_mutex_enter(sqlite3_db_mutex(conn_)); + } + ~SqliteMutexGuard() { + if (conn_) { + sqlite3_mutex_leave(sqlite3_db_mutex(conn_)); + } + conn_ = nullptr; + } + + private: + sqlite3* conn_; +}; + +class SqliteStringBuilder { + public: + SqliteStringBuilder() : str_(sqlite3_str_new(nullptr)) {} + + ~SqliteStringBuilder() { + // sqlite3_free is no-op on nullptr + sqlite3_free(result_); + result_ = nullptr; + if (str_) { + sqlite3_free(sqlite3_str_finish(str_)); + str_ = nullptr; + } + } + + void Reset() { + std::ignore = GetString(); + sqlite3_free(result_); + result_ = nullptr; + str_ = sqlite3_str_new(nullptr); + } + + void Append(std::string_view fmt, ...) { + if (str_) { + va_list args; + va_start(args, fmt); + sqlite3_str_vappendf(str_, fmt.data(), args); + va_end(args); + } + } + + Result GetString() { + int len = 0; + if (!result_) { + if (int rc = sqlite3_str_errcode(str_); rc == SQLITE_NOMEM) { + return status::Internal("out of memory building query"); + } else if (rc == SQLITE_TOOBIG) { + return status::Internal("query too long"); + } else if (rc != SQLITE_OK) { + return status::Internal("unknown SQLite error ({})", rc); + } + len = sqlite3_str_length(str_); + result_ = sqlite3_str_finish(str_); + str_ = nullptr; + } + return std::string_view(result_, len); + } + + private: + sqlite3_str* str_ = nullptr; + char* result_ = nullptr; +}; + +class SqliteQuery { + public: + explicit SqliteQuery(sqlite3* conn, std::string_view query) + : conn_(conn), query_(query) {} + + Status Init() { + int rc = sqlite3_prepare_v2(conn_, query_.data(), static_cast(query_.size()), + &stmt_, /*pzTail=*/nullptr); + if (rc != SQLITE_OK) { + return Close(rc); + } + return status::kOk; + } + + Result Next() { + if (!stmt_) { + return status::Internal( + "query already finished or never initialized\nquery was: {}", query_); + } + int rc = sqlite3_step(stmt_); + if (rc == SQLITE_ROW) { + return true; + } else if (rc == SQLITE_DONE) { + return false; + } + return Close(rc); + } + + Status Close(int rc) { + if (stmt_) { + int rc = sqlite3_finalize(stmt_); + stmt_ = nullptr; + if (rc != SQLITE_OK && rc != SQLITE_DONE) { + return status::Internal("failed to execute: {}\nquery was: {}", + sqlite3_errmsg(conn_), query_); + } + } else if (rc != SQLITE_OK) { + return status::Internal("failed to execute: {}\nquery was: {}", + sqlite3_errmsg(conn_), query_); + } + return status::kOk; + } + + Status Close() { return Close(SQLITE_OK); } + + sqlite3_stmt* stmt() const { return stmt_; } + + static Status Execute(sqlite3* conn, std::string_view query) { + SqliteQuery q(conn, query); + UNWRAP_STATUS(q.Init()); + while (true) { + UNWRAP_RESULT(bool has_row, q.Next()); + if (!has_row) break; + } + return q.Close(); + } + + template + static Status Scan(sqlite3* conn, std::string_view query, BindFunc&& bind_func, + RowFunc&& row_func) { + SqliteQuery q(conn, query); + UNWRAP_STATUS(q.Init()); + + int rc = std::forward(bind_func)(q.stmt_); + if (rc != SQLITE_OK) return q.Close(); + + while (true) { + UNWRAP_RESULT(bool has_row, q.Next()); + if (!has_row) break; + + int rc = std::forward(row_func)(q.stmt_); + if (rc != SQLITE_OK) break; + } + return q.Close(); + } + + private: + sqlite3* conn_ = nullptr; + std::string_view query_; + sqlite3_stmt* stmt_ = nullptr; +}; + +constexpr std::string_view kNoFilter = "%"; + +struct SqliteGetObjectsHelper : public driver::GetObjectsHelper { + explicit SqliteGetObjectsHelper(sqlite3* conn) : conn(conn) {} + + Status Load(int depth, std::optional catalog_filter, + std::optional schema_filter, + std::optional table_filter, + std::optional column_filter, + // TODO: const ref + std::vector table_types) override { + std::string query = + "SELECT DISTINCT name FROM pragma_database_list() WHERE name LIKE ?"; + + this->table_filter = table_filter; + this->column_filter = column_filter; + this->table_types = table_types; + + UNWRAP_STATUS(SqliteQuery::Scan( + conn, query, + [&](sqlite3_stmt* stmt) { + auto filter = catalog_filter.value_or(kNoFilter); + return sqlite3_bind_text(stmt, 1, filter.data(), + static_cast(filter.size()), SQLITE_STATIC); + }, + [&](sqlite3_stmt* stmt) { + catalogs.emplace_back(GetColumnText(stmt, 0)); + return SQLITE_OK; + })); + + // SQLite doesn't have schemas, so we assume each catalog has a single + // unnamed schema. + if (!schema_filter.has_value() || schema_filter->empty()) { + schemas = {""}; + } else { + schemas = {}; + } + + return status::kOk; + } + + Status LoadCatalogs() override { return status::kOk; }; + + Result> NextCatalog() override { + if (next_catalog >= catalogs.size()) return std::nullopt; + return catalogs[next_catalog++]; + } + + Status LoadSchemas(std::string_view catalog) override { + next_schema = 0; + return status::kOk; + }; + + Result> NextSchema() override { + if (next_schema >= schemas.size()) return std::nullopt; + return schemas[next_schema++]; + } + + Status LoadTables(std::string_view catalog, std::string_view schema) override { + next_table = 0; + tables.clear(); + if (!schema.empty()) return status::kOk; + + SqliteStringBuilder builder; + builder.Append(R"(SELECT name, type FROM "%w" . sqlite_master WHERE name LIKE ?)", + catalog.data()); + for (const auto& table_type : table_types) { + builder.Append(" AND type LIKE %Q", table_type.data()); + } + UNWRAP_RESULT(auto query, builder.GetString()); + + return SqliteQuery::Scan( + conn, query, + [&](sqlite3_stmt* stmt) { + auto filter = table_filter.value_or(kNoFilter); + return sqlite3_bind_text(stmt, 1, filter.data(), + static_cast(filter.size()), SQLITE_STATIC); + }, + [&](sqlite3_stmt* stmt) { + tables.emplace_back(GetColumnText(stmt, 0), GetColumnText(stmt, 1)); + return SQLITE_OK; + }); + }; + + Result> NextTable() override { + if (next_table >= tables.size()) return std::nullopt; + const auto& table = tables[next_table++]; + return Table{table.first, table.second}; + } + + Status LoadColumns(std::string_view catalog, std::string_view schema, + std::string_view table) override { + // XXX: pragma_table_info doesn't appear to work with bind parameters + // XXX: because we're saving the SqliteQuery, we also need to save the string builder + columns_query.Reset(); + columns_query.Append( + R"(SELECT cid, name FROM pragma_table_info("%w" , "%w") WHERE NAME LIKE ?)", + table.data(), catalog.data()); + UNWRAP_RESULT(auto query, columns_query.GetString()); + assert(!query.empty()); + + columns.emplace(conn, query); + UNWRAP_STATUS(columns->Init()); + + auto filter = column_filter.value_or(kNoFilter); + int rc = sqlite3_bind_text(columns->stmt(), 1, filter.data(), + static_cast(filter.size()), SQLITE_STATIC); + if (rc != SQLITE_OK) { + return columns->Close(rc); + } + + // As with columns, we could return constraints iteratively instead of + // reading them all up front, but that complicates the state management + + // We can get primary keys and foreign keys, but not unique constraints + // (unless we parse the SQL table definition) + + // XXX: n + 1 query pattern. You can join on a pragma so we could avoid + // this in principle but it complicates the unpacking code here quite a + // bit, so ignore for now. Also, we already have to issue a query per table. + constraints.clear(); + next_constraint = 0; + + // Get the primary key + { + SqliteStringBuilder builder; + builder.Append( + R"(SELECT name FROM pragma_table_info("%w" , "%w") WHERE pk > 0 ORDER BY pk ASC)", + table.data(), catalog.data()); + UNWRAP_RESULT(auto pk_query, builder.GetString()); + std::vector pk; + UNWRAP_STATUS(SqliteQuery::Scan( + conn, pk_query, [](sqlite3_stmt*) { return SQLITE_OK; }, + [&](sqlite3_stmt* stmt) { + pk.emplace_back(std::string(GetColumnText(stmt, 0))); + return SQLITE_OK; + })); + if (!pk.empty()) { + // it would be nice to have C++20 designated initializers... + constraints.emplace_back(OwnedConstraint{ + std::nullopt, + "PRIMARY KEY", + std::move(pk), + {}, + }); + } + } + + // Get any foreign keys + if (catalog == "main") { + // XXX: it appears experimentally that pragma_foreign_key_list won't let + // you specify the database, making the result ambiguous. We'll only + // query for the main catalog, but it appears if there's a table with + // the same name in a different database, SQLite will still happily + // return it here. + constexpr std::string_view kForeignKeyQuery = + R"(SELECT id, seq, "table", "from", "to" + FROM pragma_foreign_key_list(?) + ORDER BY id, seq ASC)"; + int prev_id = -1; + UNWRAP_STATUS(SqliteQuery::Scan( + conn, kForeignKeyQuery, + [&](sqlite3_stmt* stmt) { + return sqlite3_bind_text(stmt, 1, table.data(), + static_cast(table.size()), SQLITE_STATIC); + }, + [&](sqlite3_stmt* stmt) { + int fk_id = sqlite3_column_int(stmt, 0); + auto to_table = GetColumnText(stmt, 2); + auto from_col = GetColumnText(stmt, 3); + auto to_col = GetColumnText(stmt, 4); + + if (fk_id != prev_id) { + prev_id = fk_id; + constraints.emplace_back(OwnedConstraint{ + std::nullopt, + "FOREIGN KEY", + {}, + {}, + }); + } + constraints.back().column_names.emplace_back(from_col); + constraints.back().usage.emplace_back(OwnedConstraintUsage{ + "main", + "", + std::string(to_table), + std::string(to_col), + }); + + return SQLITE_OK; + })); + } + + return status::kOk; + }; + + Result> NextColumn() override { + if (!columns) return std::nullopt; + UNWRAP_RESULT(auto has_next, columns->Next()); + if (!has_next) { + auto query = std::move(*columns); + columns.reset(); + UNWRAP_STATUS(query.Close()); + return std::nullopt; + } + + return Column{ + reinterpret_cast(sqlite3_column_text(columns->stmt(), 1)), + sqlite3_column_int(columns->stmt(), 0) + 1, + std::nullopt, + // TODO: we can fill in xdbc_column_def and xdbc_nullable + std::nullopt, + }; + } + + Result> NextConstraint() override { + if (next_constraint >= constraints.size()) return std::nullopt; + return constraints[next_constraint++].ToDriver(); + } + + struct OwnedConstraintUsage { + std::optional catalog; + std::optional schema; + std::string table; + std::string column; + + ConstraintUsage ToDriver() const { + auto catalog = this->catalog ? std::make_optional(std::string_view(*this->catalog)) + : std::nullopt; + auto schema = this->schema ? std::make_optional(std::string_view(*this->schema)) + : std::nullopt; + return {catalog, schema, table, column}; + } + }; + + struct OwnedConstraint { + std::optional name; + std::string type; + std::vector column_names; + std::vector usage; + + Constraint ToDriver() const { + auto name = + this->name ? std::make_optional(std::string_view(*this->name)) : std::nullopt; + std::vector column_names; + std::vector usages; + for (const auto& column_name : this->column_names) { + column_names.emplace_back(column_name); + } + for (const auto& usage : this->usage) { + usages.emplace_back(usage.ToDriver()); + } + return {name, type, std::move(column_names), std::move(usages)}; + } + }; + + sqlite3* conn = nullptr; + std::optional table_filter; + std::optional column_filter; + std::vector table_types; + std::vector catalogs; + std::vector schemas; + std::vector> tables; + std::vector constraints; + SqliteStringBuilder columns_query; + std::optional columns; + size_t next_catalog = 0; + size_t next_schema = 0; + size_t next_table = 0; + size_t next_constraint = 0; +}; + +class SqliteDatabase : public driver::DatabaseBase { + public: + [[maybe_unused]] constexpr static std::string_view kErrorPrefix = "[SQLite]"; + + Result OpenConnection() { + sqlite3* conn; + int rc = sqlite3_open_v2(uri_.c_str(), &conn, + SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE | SQLITE_OPEN_URI, + /*zVfs=*/nullptr); + if (rc != SQLITE_OK) { + Status status; + if (conn_) { + status = status::IO("failed to open '{}': {}", uri_, sqlite3_errmsg(conn)); + } else { + status = status::IO("failed to open '{}': failed to allocate memory", uri_); + } + (void)sqlite3_close(conn); + return status; + } + return conn; + } + + Status InitImpl() override { + UNWRAP_RESULT(conn_, OpenConnection()); + return status::kOk; + } + + Status ReleaseImpl() override { + if (conn_) { + int rc = sqlite3_close_v2(conn_); + if (rc != SQLITE_OK) { + return status::IO("failed to close connection: ({}) {}", rc, + sqlite3_errmsg(conn_)); + } + conn_ = nullptr; + } + return Base::ReleaseImpl(); + } + + Status SetOptionImpl(std::string_view key, driver::Option value) override { + if (key == "uri") { + if (lifecycle_state_ != driver::LifecycleState::kUninitialized) { + return status::InvalidState("cannot set uri after AdbcDatabaseInit"); + } + UNWRAP_RESULT(auto uri, value.AsString()); + if (!uri.has_value()) { + return status::InvalidArgument("uri must not be NULL"); + } + uri_ = std::move(*uri); + return status::kOk; + } + return Base::SetOptionImpl(key, value); + } + + private: + std::string uri_{kDefaultUri}; + sqlite3* conn_ = nullptr; +}; + +class SqliteConnection : public driver::ConnectionBase { + public: + [[maybe_unused]] constexpr static std::string_view kErrorPrefix = "[SQLite]"; + + sqlite3* conn() const { return conn_; } + + Status CommitImpl() { + UNWRAP_STATUS(CheckOpen()); + UNWRAP_STATUS(SqliteQuery::Execute(conn_, "COMMIT")); + // begin another transaction, since we're not in autocommit + return SqliteQuery::Execute(conn_, "BEGIN"); + } + + Result> GetObjectsImpl() { + return std::make_unique(conn_); + } + + Status GetTableSchemaImpl(std::optional catalog, + std::optional db_schema, + std::string_view table_name, ArrowSchema* schema) { + if (db_schema.has_value() && !db_schema->empty()) { + return status::NotImplemented("SQLite does not support schemas"); + } + + SqliteStringBuilder builder; + builder.Append(R"(SELECT * FROM "%w" . "%w")", catalog.value_or("main").data(), + table_name.data()); + UNWRAP_RESULT(std::string_view query, builder.GetString()); + + sqlite3_stmt* stmt = nullptr; + int rc = + sqlite3_prepare_v2(conn_, query.data(), static_cast(query.size()), &stmt, + /*pzTail=*/nullptr); + if (rc != SQLITE_OK) { + return status::NotFound("GetTableSchema: %s", sqlite3_errmsg(conn_)); + } + + nanoarrow::UniqueArrayStream stream; + struct AdbcError error = ADBC_ERROR_INIT; + AdbcStatusCode status = + AdbcSqliteExportReader(conn_, stmt, /*binder=*/NULL, + /*batch_size=*/64, stream.get(), &error); + if (status == ADBC_STATUS_OK) { + int code = stream->get_schema(stream.get(), schema); + if (code != 0) { + // TODO: RAII sqlite statement + (void)sqlite3_finalize(stmt); + return status::IO("failed to get schema: (%d) %s", code, std::strerror(code)); + } + } + (void)sqlite3_finalize(stmt); + return Status::FromAdbc(status, error); + } + + Result> GetTableTypesImpl() { + return std::vector{"table", "view"}; + } + + Result> InfoImpl(const std::vector& codes) { + static std::vector kDefaultCodes{ + ADBC_INFO_VENDOR_NAME, ADBC_INFO_VENDOR_VERSION, ADBC_INFO_DRIVER_NAME, + ADBC_INFO_DRIVER_VERSION, ADBC_INFO_DRIVER_ARROW_VERSION, + }; + std::reference_wrapper> codes_ref(codes); + if (codes.empty()) { + codes_ref = kDefaultCodes; + } + + std::vector result; + for (const auto code : codes_ref.get()) { + switch (code) { + case ADBC_INFO_VENDOR_NAME: + result.emplace_back(code, "SQLite"); + break; + case ADBC_INFO_VENDOR_VERSION: + result.emplace_back(code, sqlite3_libversion()); + break; + case ADBC_INFO_DRIVER_NAME: + result.emplace_back(code, "ADBC SQLite Driver"); + break; + case ADBC_INFO_DRIVER_VERSION: + // TODO(lidavidm): fill in driver version + result.emplace_back(code, "(unknown)"); + break; + case ADBC_INFO_DRIVER_ARROW_VERSION: + result.emplace_back(code, NANOARROW_VERSION); + break; + default: + // Ignore + continue; + } + } + + return result; + } + + Status InitImpl(void* parent) { + auto& db = *reinterpret_cast(parent); + UNWRAP_RESULT(conn_, db.OpenConnection()); + return status::kOk; + } + + Status ReleaseImpl() { + if (conn_) { + int rc = sqlite3_close_v2(conn_); + if (rc != SQLITE_OK) { + return status::IO("failed to close connection: ({}) {}", rc, + sqlite3_errmsg(conn_)); + } + conn_ = nullptr; + } + return ConnectionBase::ReleaseImpl(); + } + + Status RollbackImpl() { + UNWRAP_STATUS(CheckOpen()); + UNWRAP_STATUS(SqliteQuery::Execute(conn_, "ROLLBACK")); + return SqliteQuery::Execute(conn_, "BEGIN"); + } + + Status SetOptionImpl(std::string_view key, driver::Option value) { + if (key == kConnectionOptionEnableLoadExtension) { + if (!conn_ || lifecycle_state_ != driver::LifecycleState::kInitialized) { + return status::InvalidState( + "cannot enable extension loading before AdbcConnectionInit"); + } + UNWRAP_RESULT(const bool enabled, value.AsBool()); + int rc = sqlite3_db_config(conn_, SQLITE_DBCONFIG_ENABLE_LOAD_EXTENSION, + enabled ? 1 : 0, nullptr); + if (rc != SQLITE_OK) { + return status::IO("cannot enable extension loading: {}", sqlite3_errmsg(conn_)); + } + return status::kOk; + } else if (key == kConnectionOptionLoadExtensionPath) { + if (!conn_ || lifecycle_state_ != driver::LifecycleState::kInitialized) { + return status::InvalidState("cannot load extension before AdbcConnectionInit"); + } + + UNWRAP_RESULT(auto path, value.AsString()); + if (!path) { + return status::InvalidArgument("extension path must not be NULL"); + } + extension_path_ = std::move(*path); + return status::kOk; + } else if (key == kConnectionOptionLoadExtensionEntrypoint) { +#if !defined(ADBC_SQLITE_WITH_NO_LOAD_EXTENSION) + if (extension_path_.empty()) { + return status::InvalidState("{} can only be set after {}", + kConnectionOptionLoadExtensionEntrypoint, + kConnectionOptionLoadExtensionPath); + } + UNWRAP_RESULT(auto maybe_entrypoint, value.AsString()); + const char* extension_entrypoint = + maybe_entrypoint ? maybe_entrypoint->c_str() : nullptr; + + char* message = NULL; + int rc = sqlite3_load_extension(conn_, extension_path_.c_str(), + extension_entrypoint, &message); + if (rc != SQLITE_OK) { + auto status = status::Unknown( + "failed to load extension {} (entrypoint {}): {}", extension_path_, + extension_entrypoint ? extension_entrypoint : "(NULL)", + message ? message : "(unknown error)"); + if (message) sqlite3_free(message); + return status; + } + extension_path_.clear(); + return status::kOk; +#else + return status::NotImplemented( + "this driver build does not support extension loading"); +#endif + } + return Base::SetOptionImpl(key, value); + } + + Status ToggleAutocommitImpl(bool enable_autocommit) { + UNWRAP_STATUS(CheckOpen()); + if (enable_autocommit) { + // that means we have an open transaction, just commit + return SqliteQuery::Execute(conn_, "COMMIT"); + } + // that means we have no open transaction, just begin + return SqliteQuery::Execute(conn_, "BEGIN"); + } + + private: + Status CheckOpen() const { + if (!conn_) { + return status::InvalidState("connection is not open"); + } + return status::kOk; + } + + sqlite3* conn_ = nullptr; + // Temporarily hold the extension path (since the path and entrypoint need + // to be set separately) + std::string extension_path_; +}; + +class SqliteStatement : public driver::StatementBase { + public: + [[maybe_unused]] constexpr static std::string_view kErrorPrefix = "[SQLite]"; + + Status BindImpl() { + if (bind_parameters_.release) { + struct AdbcError error = ADBC_ERROR_INIT; + if (AdbcStatusCode code = + AdbcSqliteBinderSetArrayStream(&binder_, &bind_parameters_, &error); + code != ADBC_STATUS_OK) { + return Status::FromAdbc(code, error); + } + } + return status::kOk; + } + + Result ExecuteIngestImpl(IngestState& state) { + UNWRAP_STATUS(BindImpl()); + if (!binder_.schema.release) { + return status::InvalidState("must Bind() before bulk ingestion"); + } + + // Parameter validation + + if (state.target_catalog && state.temporary) { + return status::InvalidState("cannot set both {} and {}", + ADBC_INGEST_OPTION_TARGET_CATALOG, + ADBC_INGEST_OPTION_TEMPORARY); + } else if (state.target_schema) { + // TODO: override SetOption to get this earlier + } else if (!state.target_table) { + return status::InvalidState("must set {}", ADBC_INGEST_OPTION_TARGET_TABLE); + } + + // Create statements for creating the table, inserting a row, and the table name + + SqliteStringBuilder create_query, drop_query, insert_query, table_builder; + if (state.target_catalog) { + table_builder.Append(R"("%w" . "%w")", state.target_catalog->c_str(), + state.target_table->c_str()); + } else if (state.temporary) { + // OK to be redundant (CREATE TEMP TABLE temp.foo) + table_builder.Append(R"(temp . "%w")", state.target_table->c_str()); + } else { + // If not temporary, explicitly target the main database + table_builder.Append(R"(main . "%w")", state.target_table->c_str()); + } + + UNWRAP_RESULT(std::string_view table, table_builder.GetString()); + + switch (state.table_exists_) { + case Base::TableExists::kAppend: + if (state.temporary) { + create_query.Append("CREATE TEMPORARY TABLE IF NOT EXISTS %s (", table.data()); + } else { + create_query.Append("CREATE TABLE IF NOT EXISTS %s (", table.data()); + } + break; + case Base::TableExists::kFail: + case Base::TableExists::kReplace: + if (state.temporary) { + create_query.Append("CREATE TEMPORARY TABLE %s (", table.data()); + } else { + create_query.Append("CREATE TABLE %s (", table.data()); + } + drop_query.Append("DROP TABLE IF EXISTS %s", table.data()); + break; + } + + insert_query.Append("INSERT INTO %s (", table.data()); + + struct ArrowError arrow_error = {0}; + struct ArrowSchemaView view; + std::memset(&view, 0, sizeof(view)); + for (int i = 0; i < binder_.schema.n_children; i++) { + if (i > 0) { + create_query.Append(", "); + insert_query.Append(", "); + } + + create_query.Append(R"("%w")", binder_.schema.children[i]->name); + insert_query.Append(R"("%w")", binder_.schema.children[i]->name); + + int status = ArrowSchemaViewInit(&view, binder_.schema.children[i], &arrow_error); + if (status != 0) { + return status::Internal("failed to parse schema for column {}: {} ({}): {}", i, + std::strerror(status), status, arrow_error.message); + } + + switch (view.type) { + case NANOARROW_TYPE_BOOL: + case NANOARROW_TYPE_UINT8: + case NANOARROW_TYPE_UINT16: + case NANOARROW_TYPE_UINT32: + case NANOARROW_TYPE_UINT64: + case NANOARROW_TYPE_INT8: + case NANOARROW_TYPE_INT16: + case NANOARROW_TYPE_INT32: + case NANOARROW_TYPE_INT64: + create_query.Append(" INTEGER"); + break; + case NANOARROW_TYPE_FLOAT: + case NANOARROW_TYPE_DOUBLE: + create_query.Append(" REAL"); + break; + case NANOARROW_TYPE_STRING: + case NANOARROW_TYPE_LARGE_STRING: + case NANOARROW_TYPE_DATE32: + create_query.Append(" TEXT"); + break; + case NANOARROW_TYPE_BINARY: + create_query.Append(" BLOB"); + break; + default: + break; + } + } + + create_query.Append(")"); + insert_query.Append(") VALUES ("); + for (int i = 0; i < binder_.schema.n_children; i++) { + insert_query.Append("%s?", (i > 0 ? ", " : "")); + } + insert_query.Append(")"); + + UNWRAP_RESULT(std::string_view create, create_query.GetString()); + UNWRAP_RESULT(std::string_view drop, drop_query.GetString()); + UNWRAP_RESULT(std::string_view insert, insert_query.GetString()); + + // Drop/create tables as needed + + switch (state.table_exists_) { + case Base::TableExists::kAppend: + case Base::TableExists::kFail: + // Do nothing + break; + case Base::TableExists::kReplace: { + UNWRAP_STATUS(::adbc::sqlite::SqliteQuery::Execute(conn_, drop)); + break; + } + } + switch (state.table_does_not_exist_) { + case Base::TableDoesNotExist::kCreate: { + UNWRAP_STATUS(::adbc::sqlite::SqliteQuery::Execute(conn_, create)); + break; + } + case Base::TableDoesNotExist::kFail: + // Do nothing + break; + } + + // Insert + int64_t row_count = 0; + const int is_autocommit = sqlite3_get_autocommit(conn_); + if (is_autocommit) { + UNWRAP_STATUS(::adbc::sqlite::SqliteQuery::Execute(conn_, "BEGIN")); + } + + assert(!insert.empty()); + sqlite3_stmt* stmt = nullptr; + { + int rc = sqlite3_prepare_v2(conn_, insert.data(), static_cast(insert.size()), + &stmt, /*pzTail=*/nullptr); + if (rc != SQLITE_OK) { + std::ignore = sqlite3_finalize(stmt); + return status::Internal("failed to prepare: {}\nquery was: {}", + sqlite3_errmsg(conn_), insert); + } + } + assert(stmt != nullptr); + + AdbcStatusCode status = ADBC_STATUS_OK; + struct AdbcError error = ADBC_ERROR_INIT; + while (true) { + char finished = 0; + status = AdbcSqliteBinderBindNext(&binder_, conn_, stmt, &finished, &error); + if (status != ADBC_STATUS_OK || finished) break; + + int rc = 0; + do { + rc = sqlite3_step(stmt); + } while (rc == SQLITE_ROW); + if (rc != SQLITE_DONE) { + SetError(&error, "failed to execute: %s\nquery was: %s", sqlite3_errmsg(conn_), + insert.data()); + status = ADBC_STATUS_INTERNAL; + break; + } + row_count++; + } + std::ignore = sqlite3_finalize(stmt); + + if (is_autocommit) { + if (status == ADBC_STATUS_OK) { + UNWRAP_STATUS(::adbc::sqlite::SqliteQuery::Execute(conn_, "COMMIT")); + } else { + UNWRAP_STATUS(::adbc::sqlite::SqliteQuery::Execute(conn_, "ROLLBACK")); + } + } + + if (status != ADBC_STATUS_OK) { + return Status::FromAdbc(status, error); + } + return row_count; + } + + Result ExecuteQueryImpl(ArrowArrayStream* stream) { + struct AdbcError error = ADBC_ERROR_INIT; + // TODO: batch size + UNWRAP_STATUS(BindImpl()); + + const int64_t expected = sqlite3_bind_parameter_count(stmt_); + const int64_t actual = binder_.schema.n_children; + if (actual != expected) { + return status::InvalidState("parameter count mismatch: expected {} but found {}", + expected, actual); + } + + auto status = AdbcSqliteExportReader( + conn_, stmt_, binder_.schema.release ? &binder_ : nullptr, 64, stream, &error); + if (status != ADBC_STATUS_OK) { + return Status::FromAdbc(status, error); + } + return -1; + } + + Result ExecuteQueryImpl(PreparedState& state, ArrowArrayStream* stream) { + return ExecuteQueryImpl(stream); + } + + Result ExecuteQueryImpl(QueryState& state, ArrowArrayStream* stream) { + UNWRAP_STATUS(PrepareImpl(state)); + return ExecuteQueryImpl(stream); + } + + Result ExecuteUpdateImpl() { + UNWRAP_STATUS(BindImpl()); + + const int64_t expected = sqlite3_bind_parameter_count(stmt_); + const int64_t actual = binder_.schema.n_children; + if (actual != expected) { + return status::InvalidState("parameter count mismatch: expected {} but found {}", + expected, actual); + } + + int64_t rows = 0; + + SqliteMutexGuard guard(conn_); + + while (true) { + if (binder_.schema.release) { + char finished = 0; + struct AdbcError error = ADBC_ERROR_INIT; + if (AdbcStatusCode code = + AdbcSqliteBinderBindNext(&binder_, conn_, stmt_, &finished, &error); + code != ADBC_STATUS_OK) { + AdbcSqliteBinderRelease(&binder_); + return Status::FromAdbc(code, error); + } else if (finished != 0) { + break; + } + } + + while (sqlite3_step(stmt_) == SQLITE_ROW) { + rows++; + } + + if (!binder_.schema.release) break; + } + AdbcSqliteBinderRelease(&binder_); + + if (sqlite3_reset(stmt_) != SQLITE_OK) { + const char* msg = sqlite3_errmsg(conn_); + return status::IO("failed to execute query: {}", msg ? msg : "(unknown error)"); + } + + if (sqlite3_column_count(stmt_) == 0) { + rows = sqlite3_changes(conn_); + } + return rows; + } + + Result ExecuteUpdateImpl(PreparedState& state) { return ExecuteUpdateImpl(); } + + Result ExecuteUpdateImpl(QueryState& state) { + UNWRAP_STATUS(PrepareImpl(state)); + return ExecuteUpdateImpl(); + } + + Status InitImpl(void* parent) { + conn_ = reinterpret_cast(parent)->conn(); + return StatementBase::InitImpl(parent); + } + + Status PrepareImpl(QueryState& state) { + if (stmt_) { + int rc = sqlite3_finalize(stmt_); + stmt_ = nullptr; + if (rc != SQLITE_OK) { + return status::IO("failed to finalize previous statement: ({}) {}", rc, + sqlite3_errmsg(conn_)); + } + } + + int rc = sqlite3_prepare_v2(conn_, state.query.c_str(), + static_cast(state.query.size()), &stmt_, + /*pzTail=*/nullptr); + if (rc != SQLITE_OK) { + std::string msg = sqlite3_errmsg(conn_); + std::ignore = sqlite3_finalize(stmt_); + stmt_ = NULL; + return status::InvalidArgument("failed to prepare query: {}\nquery: {}", msg, + state.query); + } + return status::kOk; + } + + Status ReleaseImpl() { + if (stmt_) { + int rc = sqlite3_finalize(stmt_); + stmt_ = nullptr; + if (rc != SQLITE_OK) { + return status::IO("failed to finalize statement: ({}) {}", rc, + sqlite3_errmsg(conn_)); + } + } + AdbcSqliteBinderRelease(&binder_); + return StatementBase::ReleaseImpl(); + } + + AdbcSqliteBinder binder_; + sqlite3* conn_ = nullptr; + sqlite3_stmt* stmt_ = nullptr; +}; + +using SqliteDriver = + adbc::driver::Driver; +} // namespace +} // namespace adbc::sqlite + +// Public names + +// TODO: this should be templated out via macro + +AdbcStatusCode AdbcDatabaseGetOption(struct AdbcDatabase* database, const char* key, + char* value, size_t* length, + struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CGetOption<>(database, key, value, length, error); +} + +AdbcStatusCode AdbcDatabaseGetOptionBytes(struct AdbcDatabase* database, const char* key, + uint8_t* value, size_t* length, + struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CGetOptionBytes<>(database, key, value, length, + error); +} + +AdbcStatusCode AdbcDatabaseGetOptionInt(struct AdbcDatabase* database, const char* key, + int64_t* value, struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CGetOptionInt<>(database, key, value, error); +} + +AdbcStatusCode AdbcDatabaseGetOptionDouble(struct AdbcDatabase* database, const char* key, + double* value, struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CGetOptionDouble<>(database, key, value, error); +} + +AdbcStatusCode AdbcDatabaseInit(struct AdbcDatabase* database, struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CDatabaseInit(database, error); +} + +AdbcStatusCode AdbcDatabaseNew(struct AdbcDatabase* database, struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CNew<>(database, error); +} + +AdbcStatusCode AdbcDatabaseRelease(struct AdbcDatabase* database, + struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CRelease<>(database, error); +} + +AdbcStatusCode AdbcDatabaseSetOption(struct AdbcDatabase* database, const char* key, + const char* value, struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CSetOption<>(database, key, value, error); +} + +AdbcStatusCode AdbcDatabaseSetOptionBytes(struct AdbcDatabase* database, const char* key, + const uint8_t* value, size_t length, + struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CSetOptionBytes<>(database, key, value, length, + error); +} + +AdbcStatusCode AdbcDatabaseSetOptionInt(struct AdbcDatabase* database, const char* key, + int64_t value, struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CSetOptionInt<>(database, key, value, error); +} + +AdbcStatusCode AdbcDatabaseSetOptionDouble(struct AdbcDatabase* database, const char* key, + double value, struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CSetOptionDouble<>(database, key, value, error); +} + +AdbcStatusCode AdbcConnectionCancel(struct AdbcConnection* connection, + struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CConnectionCancel(connection, error); +} + +AdbcStatusCode AdbcConnectionGetOption(struct AdbcConnection* connection, const char* key, + char* value, size_t* length, + struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CGetOption<>(connection, key, value, length, error); +} + +AdbcStatusCode AdbcConnectionGetOptionBytes(struct AdbcConnection* connection, + const char* key, uint8_t* value, + size_t* length, struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CGetOptionBytes<>(connection, key, value, length, + error); +} + +AdbcStatusCode AdbcConnectionGetOptionInt(struct AdbcConnection* connection, + const char* key, int64_t* value, + struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CGetOptionInt<>(connection, key, value, error); +} + +AdbcStatusCode AdbcConnectionGetOptionDouble(struct AdbcConnection* connection, + const char* key, double* value, + struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CGetOptionDouble<>(connection, key, value, error); +} + +AdbcStatusCode AdbcConnectionNew(struct AdbcConnection* connection, + struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CNew<>(connection, error); +} + +AdbcStatusCode AdbcConnectionSetOption(struct AdbcConnection* connection, const char* key, + const char* value, struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CSetOption<>(connection, key, value, error); +} + +AdbcStatusCode AdbcConnectionSetOptionBytes(struct AdbcConnection* connection, + const char* key, const uint8_t* value, + size_t length, struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CSetOptionBytes<>(connection, key, value, length, + error); +} + +AdbcStatusCode AdbcConnectionSetOptionInt(struct AdbcConnection* connection, + const char* key, int64_t value, + struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CSetOptionInt<>(connection, key, value, error); +} + +AdbcStatusCode AdbcConnectionSetOptionDouble(struct AdbcConnection* connection, + const char* key, double value, + struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CSetOptionDouble<>(connection, key, value, error); +} + +AdbcStatusCode AdbcConnectionInit(struct AdbcConnection* connection, + struct AdbcDatabase* database, + struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CConnectionInit(connection, database, error); +} + +AdbcStatusCode AdbcConnectionRelease(struct AdbcConnection* connection, + struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CRelease<>(connection, error); +} + +AdbcStatusCode AdbcConnectionGetInfo(struct AdbcConnection* connection, + const uint32_t* info_codes, size_t info_codes_length, + struct ArrowArrayStream* out, + struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CConnectionGetInfo(connection, info_codes, + info_codes_length, out, error); +} + +AdbcStatusCode AdbcConnectionGetObjects(struct AdbcConnection* connection, int depth, + const char* catalog, const char* db_schema, + const char* table_name, const char** table_type, + const char* column_name, + struct ArrowArrayStream* out, + struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CConnectionGetObjects( + connection, depth, catalog, db_schema, table_name, table_type, column_name, out, + error); +} + +AdbcStatusCode AdbcConnectionGetStatistics(struct AdbcConnection* connection, + const char* catalog, const char* db_schema, + const char* table_name, char approximate, + struct ArrowArrayStream* out, + struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CConnectionGetStatistics( + connection, catalog, db_schema, table_name, approximate, out, error); +} + +AdbcStatusCode AdbcConnectionGetStatisticNames(struct AdbcConnection* connection, + struct ArrowArrayStream* out, + struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CConnectionGetStatisticNames(connection, out, error); +} + +AdbcStatusCode AdbcConnectionGetTableSchema(struct AdbcConnection* connection, + const char* catalog, const char* db_schema, + const char* table_name, + struct ArrowSchema* schema, + struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CConnectionGetTableSchema( + connection, catalog, db_schema, table_name, schema, error); +} + +AdbcStatusCode AdbcConnectionGetTableTypes(struct AdbcConnection* connection, + struct ArrowArrayStream* out, + struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CConnectionGetTableTypes(connection, out, error); +} + +AdbcStatusCode AdbcConnectionReadPartition(struct AdbcConnection* connection, + const uint8_t* serialized_partition, + size_t serialized_length, + struct ArrowArrayStream* out, + struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CConnectionReadPartition( + connection, serialized_partition, serialized_length, out, error); +} + +AdbcStatusCode AdbcConnectionCommit(struct AdbcConnection* connection, + struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CConnectionCommit(connection, error); +} + +AdbcStatusCode AdbcConnectionRollback(struct AdbcConnection* connection, + struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CConnectionRollback(connection, error); +} + +AdbcStatusCode AdbcStatementCancel(struct AdbcStatement* statement, + struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CStatementCancel(statement, error); +} + +AdbcStatusCode AdbcStatementNew(struct AdbcConnection* connection, + struct AdbcStatement* statement, + struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CStatementNew(connection, statement, error); +} + +AdbcStatusCode AdbcStatementRelease(struct AdbcStatement* statement, + struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CRelease<>(statement, error); +} + +AdbcStatusCode AdbcStatementExecuteQuery(struct AdbcStatement* statement, + struct ArrowArrayStream* out, + int64_t* rows_affected, + struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CStatementExecuteQuery(statement, out, rows_affected, + error); +} + +AdbcStatusCode AdbcStatementExecuteSchema(struct AdbcStatement* statement, + struct ArrowSchema* schema, + struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CStatementExecuteSchema(statement, schema, error); +} + +AdbcStatusCode AdbcStatementPrepare(struct AdbcStatement* statement, + struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CStatementPrepare(statement, error); +} + +AdbcStatusCode AdbcStatementSetSqlQuery(struct AdbcStatement* statement, + const char* query, struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CStatementSetSqlQuery(statement, query, error); +} + +AdbcStatusCode AdbcStatementSetSubstraitPlan(struct AdbcStatement* statement, + const uint8_t* plan, size_t length, + struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CStatementSetSubstraitPlan(statement, plan, length, + error); +} + +AdbcStatusCode AdbcStatementBind(struct AdbcStatement* statement, + struct ArrowArray* values, struct ArrowSchema* schema, + struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CStatementBind(statement, values, schema, error); +} + +AdbcStatusCode AdbcStatementBindStream(struct AdbcStatement* statement, + struct ArrowArrayStream* stream, + struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CStatementBindStream(statement, stream, error); +} + +AdbcStatusCode AdbcStatementGetOption(struct AdbcStatement* statement, const char* key, + char* value, size_t* length, + struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CGetOption<>(statement, key, value, length, error); +} + +AdbcStatusCode AdbcStatementGetOptionBytes(struct AdbcStatement* statement, + const char* key, uint8_t* value, + size_t* length, struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CGetOptionBytes<>(statement, key, value, length, + error); +} + +AdbcStatusCode AdbcStatementGetOptionInt(struct AdbcStatement* statement, const char* key, + int64_t* value, struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CGetOptionInt<>(statement, key, value, error); +} + +AdbcStatusCode AdbcStatementGetOptionDouble(struct AdbcStatement* statement, + const char* key, double* value, + struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CGetOptionDouble<>(statement, key, value, error); +} + +AdbcStatusCode AdbcStatementGetParameterSchema(struct AdbcStatement* statement, + struct ArrowSchema* schema, + struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CStatementGetParameterSchema(statement, schema, + error); +} + +AdbcStatusCode AdbcStatementSetOption(struct AdbcStatement* statement, const char* key, + const char* value, struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CSetOption<>(statement, key, value, error); +} + +AdbcStatusCode AdbcStatementSetOptionBytes(struct AdbcStatement* statement, + const char* key, const uint8_t* value, + size_t length, struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CSetOptionBytes<>(statement, key, value, length, + error); +} + +AdbcStatusCode AdbcStatementSetOptionInt(struct AdbcStatement* statement, const char* key, + int64_t value, struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CSetOptionInt<>(statement, key, value, error); +} + +AdbcStatusCode AdbcStatementSetOptionDouble(struct AdbcStatement* statement, + const char* key, double value, + struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CSetOptionDouble<>(statement, key, value, error); +} + +AdbcStatusCode AdbcStatementExecutePartitions(struct AdbcStatement* statement, + struct ArrowSchema* schema, + struct AdbcPartitions* partitions, + int64_t* rows_affected, + struct AdbcError* error) { + return adbc::sqlite::SqliteDriver::CStatementExecutePartitions( + statement, schema, partitions, rows_affected, error); +} + +extern "C" { +[[maybe_unused]] ADBC_EXPORT AdbcStatusCode AdbcDriverSqliteInit(int version, + void* raw_driver, + AdbcError* error) { + return adbc::sqlite::SqliteDriver::Init(version, raw_driver, error); +} + +[[maybe_unused]] ADBC_EXPORT AdbcStatusCode AdbcDriverInit(int version, void* raw_driver, + AdbcError* error) { + return adbc::sqlite::SqliteDriver::Init(version, raw_driver, error); +} +} diff --git a/c/driver/sqlite/sqlite_test.cc b/c/driver/sqlite/sqlite_test.cc index 70a1ad6708..72fe0d1501 100644 --- a/c/driver/sqlite/sqlite_test.cc +++ b/c/driver/sqlite/sqlite_test.cc @@ -132,14 +132,13 @@ class SqliteQuirks : public adbc_validation::DriverQuirks { return ddl; } - bool supports_bulk_ingest(const char* mode) const override { - return std::strcmp(mode, ADBC_INGEST_OPTION_MODE_APPEND) == 0 || - std::strcmp(mode, ADBC_INGEST_OPTION_MODE_CREATE) == 0; - } + bool supports_bulk_ingest(const char* mode) const override { return true; } bool supports_bulk_ingest_catalog() const override { return true; } bool supports_bulk_ingest_temporary() const override { return true; } bool supports_concurrent_statements() const override { return true; } - bool supports_get_option() const override { return false; } + bool supports_metadata_current_catalog() const override { return true; } + bool supports_metadata_current_db_schema() const override { return false; } + bool supports_get_option() const override { return true; } std::optional supports_get_sql_info( uint32_t info_code) const override { switch (info_code) { diff --git a/c/driver_manager/adbc_driver_manager_test.cc b/c/driver_manager/adbc_driver_manager_test.cc index 18e0a87dce..fa594ed5d3 100644 --- a/c/driver_manager/adbc_driver_manager_test.cc +++ b/c/driver_manager/adbc_driver_manager_test.cc @@ -105,7 +105,7 @@ TEST_F(DriverManager, ConnectionOptions) { IsOkStatus(&error)); ASSERT_EQ(ADBC_STATUS_NOT_IMPLEMENTED, AdbcConnectionInit(&connection, &database, &error)); - ASSERT_THAT(error.message, ::testing::HasSubstr("Unknown connection option foo=bar")); + ASSERT_THAT(error.message, ::testing::HasSubstr("unknown connection option foo='bar'")); ASSERT_THAT(AdbcConnectionRelease(&connection, &error), IsOkStatus(&error)); ASSERT_THAT(AdbcDatabaseRelease(&database, &error), IsOkStatus(&error)); @@ -144,7 +144,7 @@ TEST_F(DriverManager, MultiDriverTest) { ASSERT_THAT(AdbcDatabaseSetOption(&sqlite_db.value, "unknown", "foo", &error.value), IsStatus(ADBC_STATUS_NOT_IMPLEMENTED, &error.value)); ASSERT_THAT(error->message, - ::testing::HasSubstr("[SQLite] Unknown database option unknown=foo")); + ::testing::HasSubstr("Unknown database option unknown='foo'")); error->release(&error.value); ASSERT_THAT(AdbcConnectionNew(&sqlite_conn.value, &error.value), @@ -218,6 +218,8 @@ class SqliteQuirks : public adbc_validation::DriverQuirks { return std::nullopt; } } + bool supports_metadata_current_catalog() const override { return true; } + std::string catalog() const override { return "main"; } }; class SqliteDatabaseTest : public ::testing::Test, public adbc_validation::DatabaseTest { diff --git a/c/validation/adbc_validation_connection.cc b/c/validation/adbc_validation_connection.cc index 4ed1d0e098..dc726ccf15 100644 --- a/c/validation/adbc_validation_connection.cc +++ b/c/validation/adbc_validation_connection.cc @@ -105,8 +105,10 @@ void ConnectionTest::TestAutocommitDefault() { // or rollback ASSERT_THAT(AdbcConnectionCommit(&connection, &error), IsStatus(ADBC_STATUS_INVALID_STATE, &error)); + if (error.release) error.release(&error); ASSERT_THAT(AdbcConnectionRollback(&connection, &error), IsStatus(ADBC_STATUS_INVALID_STATE, &error)); + if (error.release) error.release(&error); // Invalid option value ASSERT_THAT(AdbcConnectionSetOption(&connection, ADBC_CONNECTION_OPTION_AUTOCOMMIT, @@ -531,7 +533,7 @@ void ConnectionTest::TestMetadataGetObjectsDbSchemas() { << ") should have nonempty catalog_db_schemas "; ASSERT_FALSE(ArrowArrayViewIsNull(catalog_db_schemas_list, row)); for (int64_t list_index = start_offset; list_index < end_offset; list_index++) { - ASSERT_TRUE(ArrowArrayViewIsNull(db_schema_tables_list, row + list_index)) + EXPECT_TRUE(ArrowArrayViewIsNull(db_schema_tables_list, list_index)) << "Row " << row << " should have null db_schema_tables"; } } @@ -617,18 +619,24 @@ void ConnectionTest::TestMetadataGetObjectsTables() { ASSERT_FALSE(ArrowArrayViewIsNull(catalog_db_schemas_list, row)) << "Row " << row << " should have non-null catalog_db_schemas"; - for (int64_t db_schemas_index = - ArrowArrayViewListChildOffset(catalog_db_schemas_list, row); - db_schemas_index < - ArrowArrayViewListChildOffset(catalog_db_schemas_list, row + 1); + int64_t schema_start = + ArrowArrayViewListChildOffset(catalog_db_schemas_list, row); + int64_t schema_end = + ArrowArrayViewListChildOffset(catalog_db_schemas_list, row + 1); + ASSERT_LE(schema_start, schema_end); + for (int64_t db_schemas_index = schema_start; db_schemas_index < schema_end; db_schemas_index++) { ASSERT_FALSE(ArrowArrayViewIsNull(db_schema_tables_list, db_schemas_index)) << "Row " << row << " should have non-null db_schema_tables"; - for (int64_t tables_index = - ArrowArrayViewListChildOffset(db_schema_tables_list, db_schemas_index); - tables_index < - ArrowArrayViewListChildOffset(db_schema_tables_list, db_schemas_index + 1); + int64_t table_start = + ArrowArrayViewListChildOffset(db_schema_tables_list, db_schemas_index); + int64_t table_end = + ArrowArrayViewListChildOffset(db_schema_tables_list, db_schemas_index + 1); + if (expected.second) { + ASSERT_LT(table_start, table_end); + } + for (int64_t tables_index = table_start; tables_index < table_end; tables_index++) { ArrowStringView table_name = ArrowArrayViewGetStringUnsafe( db_schema_tables->children[0], tables_index); @@ -816,6 +824,7 @@ void ConnectionTest::TestMetadataGetObjectsColumns() { "bulk_ingest") && iequals(std::string(db_schema_name.data, db_schema_name.size_bytes), quirks()->db_schema())) { + ASSERT_FALSE(found_expected_table); found_expected_table = true; for (int64_t columns_index = diff --git a/c/vendor/fmt/.clang-format b/c/vendor/fmt/.clang-format new file mode 100644 index 0000000000..df55d340f0 --- /dev/null +++ b/c/vendor/fmt/.clang-format @@ -0,0 +1,8 @@ +# Run manually to reformat a file: +# clang-format -i --style=file +Language: Cpp +BasedOnStyle: Google +IndentPPDirectives: AfterHash +IndentCaseLabels: false +AlwaysBreakTemplateDeclarations: false +DerivePointerAlignment: false diff --git a/c/vendor/fmt/CMakeLists.txt b/c/vendor/fmt/CMakeLists.txt new file mode 100644 index 0000000000..4b928ae35c --- /dev/null +++ b/c/vendor/fmt/CMakeLists.txt @@ -0,0 +1,453 @@ +cmake_minimum_required(VERSION 3.8...3.26) + +# Fallback for using newer policies on CMake <3.12. +if (${CMAKE_VERSION} VERSION_LESS 3.12) + cmake_policy(VERSION ${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION}) +endif () + +# Determine if fmt is built as a subproject (using add_subdirectory) +# or if it is the master project. +if (NOT DEFINED FMT_MASTER_PROJECT) + set(FMT_MASTER_PROJECT OFF) + if (CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR) + set(FMT_MASTER_PROJECT ON) + message(STATUS "CMake version: ${CMAKE_VERSION}") + endif () +endif () + +# Joins arguments and places the results in ${result_var}. +function(join result_var) + set(result "") + foreach (arg ${ARGN}) + set(result "${result}${arg}") + endforeach () + set(${result_var} "${result}" PARENT_SCOPE) +endfunction() + +# DEPRECATED! Should be merged into add_module_library. +function(enable_module target) + if (MSVC) + set(BMI ${CMAKE_CURRENT_BINARY_DIR}/${target}.ifc) + target_compile_options(${target} + PRIVATE /interface /ifcOutput ${BMI} + INTERFACE /reference fmt=${BMI}) + set_target_properties(${target} PROPERTIES ADDITIONAL_CLEAN_FILES ${BMI}) + set_source_files_properties(${BMI} PROPERTIES GENERATED ON) + endif () +endfunction() + +# Adds a library compiled with C++20 module support. +# `enabled` is a CMake variables that specifies if modules are enabled. +# If modules are disabled `add_module_library` falls back to creating a +# non-modular library. +# +# Usage: +# add_module_library( [sources...] FALLBACK [sources...] [IF enabled]) +function(add_module_library name) + cmake_parse_arguments(AML "" "IF" "FALLBACK" ${ARGN}) + set(sources ${AML_UNPARSED_ARGUMENTS}) + + add_library(${name}) + set_target_properties(${name} PROPERTIES LINKER_LANGUAGE CXX) + + if (NOT ${${AML_IF}}) + # Create a non-modular library. + target_sources(${name} PRIVATE ${AML_FALLBACK}) + return() + endif () + + # Modules require C++20. + target_compile_features(${name} PUBLIC cxx_std_20) + if (CMAKE_COMPILER_IS_GNUCXX) + target_compile_options(${name} PUBLIC -fmodules-ts) + endif () + + # `std` is affected by CMake options and may be higher than C++20. + get_target_property(std ${name} CXX_STANDARD) + + if (CMAKE_CXX_COMPILER_ID MATCHES "Clang") + set(pcms) + foreach (src ${sources}) + get_filename_component(pcm ${src} NAME_WE) + set(pcm ${pcm}.pcm) + + # Propagate -fmodule-file=*.pcm to targets that link with this library. + target_compile_options( + ${name} PUBLIC -fmodule-file=${CMAKE_CURRENT_BINARY_DIR}/${pcm}) + + # Use an absolute path to prevent target_link_libraries prepending -l + # to it. + set(pcms ${pcms} ${CMAKE_CURRENT_BINARY_DIR}/${pcm}) + add_custom_command( + OUTPUT ${pcm} + COMMAND ${CMAKE_CXX_COMPILER} + -std=c++${std} -x c++-module --precompile -c + -o ${pcm} ${CMAKE_CURRENT_SOURCE_DIR}/${src} + "-I$,;-I>" + # Required by the -I generator expression above. + COMMAND_EXPAND_LISTS + DEPENDS ${src}) + endforeach () + + # Add .pcm files as sources to make sure they are built before the library. + set(sources) + foreach (pcm ${pcms}) + get_filename_component(pcm_we ${pcm} NAME_WE) + set(obj ${pcm_we}.o) + # Use an absolute path to prevent target_link_libraries prepending -l. + set(sources ${sources} ${pcm} ${CMAKE_CURRENT_BINARY_DIR}/${obj}) + add_custom_command( + OUTPUT ${obj} + COMMAND ${CMAKE_CXX_COMPILER} $ + -c -o ${obj} ${pcm} + DEPENDS ${pcm}) + endforeach () + endif () + target_sources(${name} PRIVATE ${sources}) +endfunction() + +include(CMakeParseArguments) + +# Sets a cache variable with a docstring joined from multiple arguments: +# set( ... CACHE ...) +# This allows splitting a long docstring for readability. +function(set_verbose) + # cmake_parse_arguments is broken in CMake 3.4 (cannot parse CACHE) so use + # list instead. + list(GET ARGN 0 var) + list(REMOVE_AT ARGN 0) + list(GET ARGN 0 val) + list(REMOVE_AT ARGN 0) + list(REMOVE_AT ARGN 0) + list(GET ARGN 0 type) + list(REMOVE_AT ARGN 0) + join(doc ${ARGN}) + set(${var} ${val} CACHE ${type} ${doc}) +endfunction() + +# Set the default CMAKE_BUILD_TYPE to Release. +# This should be done before the project command since the latter can set +# CMAKE_BUILD_TYPE itself (it does so for nmake). +if (FMT_MASTER_PROJECT AND NOT CMAKE_BUILD_TYPE) + set_verbose(CMAKE_BUILD_TYPE Release CACHE STRING + "Choose the type of build, options are: None(CMAKE_CXX_FLAGS or " + "CMAKE_C_FLAGS used) Debug Release RelWithDebInfo MinSizeRel.") +endif () + +project(FMT CXX) +include(GNUInstallDirs) +set_verbose(FMT_INC_DIR ${CMAKE_INSTALL_INCLUDEDIR} CACHE STRING + "Installation directory for include files, a relative path that " + "will be joined with ${CMAKE_INSTALL_PREFIX} or an absolute path.") + +option(FMT_PEDANTIC "Enable extra warnings and expensive tests." OFF) +option(FMT_WERROR "Halt the compilation with an error on compiler warnings." + OFF) + +# Options that control generation of various targets. +option(FMT_DOC "Generate the doc target." ${FMT_MASTER_PROJECT}) +option(FMT_INSTALL "Generate the install target." ON) +option(FMT_TEST "Generate the test target." ${FMT_MASTER_PROJECT}) +option(FMT_FUZZ "Generate the fuzz target." OFF) +option(FMT_CUDA_TEST "Generate the cuda-test target." OFF) +option(FMT_OS "Include core requiring OS (Windows/Posix) " ON) +option(FMT_MODULE "Build a module instead of a traditional library." OFF) +option(FMT_SYSTEM_HEADERS "Expose headers with marking them as system." OFF) + +if (FMT_TEST AND FMT_MODULE) + # The tests require {fmt} to be compiled as traditional library + message(STATUS "Testing is incompatible with build mode 'module'.") +endif () +set(FMT_SYSTEM_HEADERS_ATTRIBUTE "") +if (FMT_SYSTEM_HEADERS) + set(FMT_SYSTEM_HEADERS_ATTRIBUTE SYSTEM) +endif () +if (CMAKE_SYSTEM_NAME STREQUAL "MSDOS") + set(FMT_TEST OFF) + message(STATUS "MSDOS is incompatible with gtest") +endif () + +# Get version from core.h +file(READ include/fmt/core.h core_h) +if (NOT core_h MATCHES "FMT_VERSION ([0-9]+)([0-9][0-9])([0-9][0-9])") + message(FATAL_ERROR "Cannot get FMT_VERSION from core.h.") +endif () +# Use math to skip leading zeros if any. +math(EXPR CPACK_PACKAGE_VERSION_MAJOR ${CMAKE_MATCH_1}) +math(EXPR CPACK_PACKAGE_VERSION_MINOR ${CMAKE_MATCH_2}) +math(EXPR CPACK_PACKAGE_VERSION_PATCH ${CMAKE_MATCH_3}) +join(FMT_VERSION ${CPACK_PACKAGE_VERSION_MAJOR}.${CPACK_PACKAGE_VERSION_MINOR}. + ${CPACK_PACKAGE_VERSION_PATCH}) +message(STATUS "Version: ${FMT_VERSION}") + +message(STATUS "Build type: ${CMAKE_BUILD_TYPE}") + +if (NOT CMAKE_RUNTIME_OUTPUT_DIRECTORY) + set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/bin) +endif () + +set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} + "${CMAKE_CURRENT_SOURCE_DIR}/support/cmake") + +include(CheckCXXCompilerFlag) +include(JoinPaths) + +if (FMT_MASTER_PROJECT AND NOT DEFINED CMAKE_CXX_VISIBILITY_PRESET) + set_verbose(CMAKE_CXX_VISIBILITY_PRESET hidden CACHE STRING + "Preset for the export of private symbols") + set_property(CACHE CMAKE_CXX_VISIBILITY_PRESET PROPERTY STRINGS + hidden default) +endif () + +if (FMT_MASTER_PROJECT AND NOT DEFINED CMAKE_VISIBILITY_INLINES_HIDDEN) + set_verbose(CMAKE_VISIBILITY_INLINES_HIDDEN ON CACHE BOOL + "Whether to add a compile flag to hide symbols of inline functions") +endif () + +if (CMAKE_CXX_COMPILER_ID MATCHES "GNU") + set(PEDANTIC_COMPILE_FLAGS -pedantic-errors -Wall -Wextra -pedantic + -Wold-style-cast -Wundef + -Wredundant-decls -Wwrite-strings -Wpointer-arith + -Wcast-qual -Wformat=2 -Wmissing-include-dirs + -Wcast-align + -Wctor-dtor-privacy -Wdisabled-optimization + -Winvalid-pch -Woverloaded-virtual + -Wconversion -Wundef + -Wno-ctor-dtor-privacy -Wno-format-nonliteral) + if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.6) + set(PEDANTIC_COMPILE_FLAGS ${PEDANTIC_COMPILE_FLAGS} + -Wno-dangling-else -Wno-unused-local-typedefs) + endif () + if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5.0) + set(PEDANTIC_COMPILE_FLAGS ${PEDANTIC_COMPILE_FLAGS} -Wdouble-promotion + -Wtrampolines -Wzero-as-null-pointer-constant -Wuseless-cast + -Wvector-operation-performance -Wsized-deallocation -Wshadow) + endif () + if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 6.0) + set(PEDANTIC_COMPILE_FLAGS ${PEDANTIC_COMPILE_FLAGS} -Wshift-overflow=2 + -Wnull-dereference -Wduplicated-cond) + endif () + set(WERROR_FLAG -Werror) +endif () + +if (CMAKE_CXX_COMPILER_ID MATCHES "Clang") + set(PEDANTIC_COMPILE_FLAGS -Wall -Wextra -pedantic -Wconversion -Wundef + -Wdeprecated -Wweak-vtables -Wshadow + -Wno-gnu-zero-variadic-macro-arguments) + check_cxx_compiler_flag(-Wzero-as-null-pointer-constant HAS_NULLPTR_WARNING) + if (HAS_NULLPTR_WARNING) + set(PEDANTIC_COMPILE_FLAGS ${PEDANTIC_COMPILE_FLAGS} + -Wzero-as-null-pointer-constant) + endif () + set(WERROR_FLAG -Werror) +endif () + +if (MSVC) + set(PEDANTIC_COMPILE_FLAGS /W3) + set(WERROR_FLAG /WX) +endif () + +if (FMT_MASTER_PROJECT AND CMAKE_GENERATOR MATCHES "Visual Studio") + # If Microsoft SDK is installed create script run-msbuild.bat that + # calls SetEnv.cmd to set up build environment and runs msbuild. + # It is useful when building Visual Studio projects with the SDK + # toolchain rather than Visual Studio. + include(FindSetEnv) + if (WINSDK_SETENV) + set(MSBUILD_SETUP "call \"${WINSDK_SETENV}\"") + endif () + # Set FrameworkPathOverride to get rid of MSB3644 warnings. + join(netfxpath + "C:\\Program Files\\Reference Assemblies\\Microsoft\\Framework\\" + ".NETFramework\\v4.0") + file(WRITE run-msbuild.bat " + ${MSBUILD_SETUP} + ${CMAKE_MAKE_PROGRAM} -p:FrameworkPathOverride=\"${netfxpath}\" %*") +endif () + +function(add_headers VAR) + set(headers ${${VAR}}) + foreach (header ${ARGN}) + set(headers ${headers} include/fmt/${header}) + endforeach() + set(${VAR} ${headers} PARENT_SCOPE) +endfunction() + +# Define the fmt library, its includes and the needed defines. +add_headers(FMT_HEADERS args.h chrono.h color.h compile.h core.h format.h + format-inl.h os.h ostream.h printf.h ranges.h std.h + xchar.h) +set(FMT_SOURCES src/format.cc) +if (FMT_OS) + set(FMT_SOURCES ${FMT_SOURCES} src/os.cc) +endif () + +add_module_library(fmt src/fmt.cc FALLBACK + ${FMT_SOURCES} ${FMT_HEADERS} README.md ChangeLog.md + IF FMT_MODULE) +add_library(fmt::fmt ALIAS fmt) +if (FMT_MODULE) + enable_module(fmt) +endif () + +if (FMT_WERROR) + target_compile_options(fmt PRIVATE ${WERROR_FLAG}) +endif () +if (FMT_PEDANTIC) + target_compile_options(fmt PRIVATE ${PEDANTIC_COMPILE_FLAGS}) +endif () + +if (cxx_std_11 IN_LIST CMAKE_CXX_COMPILE_FEATURES) + target_compile_features(fmt PUBLIC cxx_std_11) +else () + message(WARNING "Feature cxx_std_11 is unknown for the CXX compiler") +endif () + +target_include_directories(fmt ${FMT_SYSTEM_HEADERS_ATTRIBUTE} PUBLIC + $ + $) + +set(FMT_DEBUG_POSTFIX d CACHE STRING "Debug library postfix.") + +set_target_properties(fmt PROPERTIES + VERSION ${FMT_VERSION} SOVERSION ${CPACK_PACKAGE_VERSION_MAJOR} + PUBLIC_HEADER "${FMT_HEADERS}" + DEBUG_POSTFIX "${FMT_DEBUG_POSTFIX}" + + # Workaround for Visual Studio 2017: + # Ensure the .pdb is created with the same name and in the same directory + # as the .lib. Newer VS versions already do this by default, but there is no + # harm in setting it for those too. Ignored by other generators. + COMPILE_PDB_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}" + COMPILE_PDB_NAME "fmt" + COMPILE_PDB_NAME_DEBUG "fmt${FMT_DEBUG_POSTFIX}") + +# Set FMT_LIB_NAME for pkg-config fmt.pc. We cannot use the OUTPUT_NAME target +# property because it's not set by default. +set(FMT_LIB_NAME fmt) +if (CMAKE_BUILD_TYPE STREQUAL "Debug") + set(FMT_LIB_NAME ${FMT_LIB_NAME}${FMT_DEBUG_POSTFIX}) +endif () + +if (BUILD_SHARED_LIBS) + target_compile_definitions(fmt PRIVATE FMT_LIB_EXPORT INTERFACE FMT_SHARED) +endif () +if (FMT_SAFE_DURATION_CAST) + target_compile_definitions(fmt PUBLIC FMT_SAFE_DURATION_CAST) +endif () + +add_library(fmt-header-only INTERFACE) +add_library(fmt::fmt-header-only ALIAS fmt-header-only) + +target_compile_definitions(fmt-header-only INTERFACE FMT_HEADER_ONLY=1) +target_compile_features(fmt-header-only INTERFACE cxx_std_11) + +target_include_directories(fmt-header-only + ${FMT_SYSTEM_HEADERS_ATTRIBUTE} INTERFACE + $ + $) + +# Install targets. +if (FMT_INSTALL) + include(CMakePackageConfigHelpers) + set_verbose(FMT_CMAKE_DIR ${CMAKE_INSTALL_LIBDIR}/cmake/fmt CACHE STRING + "Installation directory for cmake files, a relative path that " + "will be joined with ${CMAKE_INSTALL_PREFIX} or an absolute " + "path.") + set(version_config ${PROJECT_BINARY_DIR}/fmt-config-version.cmake) + set(project_config ${PROJECT_BINARY_DIR}/fmt-config.cmake) + set(pkgconfig ${PROJECT_BINARY_DIR}/fmt.pc) + set(targets_export_name fmt-targets) + + set_verbose(FMT_LIB_DIR ${CMAKE_INSTALL_LIBDIR} CACHE STRING + "Installation directory for libraries, a relative path that " + "will be joined to ${CMAKE_INSTALL_PREFIX} or an absolute path.") + + set_verbose(FMT_PKGCONFIG_DIR ${CMAKE_INSTALL_LIBDIR}/pkgconfig CACHE STRING + "Installation directory for pkgconfig (.pc) files, a relative " + "path that will be joined with ${CMAKE_INSTALL_PREFIX} or an " + "absolute path.") + + # Generate the version, config and target files into the build directory. + write_basic_package_version_file( + ${version_config} + VERSION ${FMT_VERSION} + COMPATIBILITY AnyNewerVersion) + + join_paths(libdir_for_pc_file "\${exec_prefix}" "${FMT_LIB_DIR}") + join_paths(includedir_for_pc_file "\${prefix}" "${FMT_INC_DIR}") + + configure_file( + "${PROJECT_SOURCE_DIR}/support/cmake/fmt.pc.in" + "${pkgconfig}" + @ONLY) + configure_package_config_file( + ${PROJECT_SOURCE_DIR}/support/cmake/fmt-config.cmake.in + ${project_config} + INSTALL_DESTINATION ${FMT_CMAKE_DIR}) + + set(INSTALL_TARGETS fmt fmt-header-only) + + # Install the library and headers. + install(TARGETS ${INSTALL_TARGETS} EXPORT ${targets_export_name} + LIBRARY DESTINATION ${FMT_LIB_DIR} + ARCHIVE DESTINATION ${FMT_LIB_DIR} + PUBLIC_HEADER DESTINATION "${FMT_INC_DIR}/fmt" + RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}) + + # Use a namespace because CMake provides better diagnostics for namespaced + # imported targets. + export(TARGETS ${INSTALL_TARGETS} NAMESPACE fmt:: + FILE ${PROJECT_BINARY_DIR}/${targets_export_name}.cmake) + + # Install version, config and target files. + install( + FILES ${project_config} ${version_config} + DESTINATION ${FMT_CMAKE_DIR}) + install(EXPORT ${targets_export_name} DESTINATION ${FMT_CMAKE_DIR} + NAMESPACE fmt::) + + install(FILES "${pkgconfig}" DESTINATION "${FMT_PKGCONFIG_DIR}") +endif () + +if (FMT_DOC) + add_subdirectory(doc) +endif () + +if (FMT_TEST) + enable_testing() + add_subdirectory(test) +endif () + +# Control fuzzing independent of the unit tests. +if (FMT_FUZZ) + add_subdirectory(test/fuzzing) + + # The FMT_FUZZ macro is used to prevent resource exhaustion in fuzzing + # mode and make fuzzing practically possible. It is similar to + # FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION but uses a different name to + # avoid interfering with fuzzing of projects that use {fmt}. + # See also https://llvm.org/docs/LibFuzzer.html#fuzzer-friendly-build-mode. + target_compile_definitions(fmt PUBLIC FMT_FUZZ) +endif () + +set(gitignore ${PROJECT_SOURCE_DIR}/.gitignore) +if (FMT_MASTER_PROJECT AND EXISTS ${gitignore}) + # Get the list of ignored files from .gitignore. + file (STRINGS ${gitignore} lines) + list(REMOVE_ITEM lines /doc/html) + foreach (line ${lines}) + string(REPLACE "." "[.]" line "${line}") + string(REPLACE "*" ".*" line "${line}") + set(ignored_files ${ignored_files} "${line}$" "${line}/") + endforeach () + set(ignored_files ${ignored_files} + /.git /breathe /format-benchmark sphinx/ .buildinfo .doctrees) + + set(CPACK_SOURCE_GENERATOR ZIP) + set(CPACK_SOURCE_IGNORE_FILES ${ignored_files}) + set(CPACK_SOURCE_PACKAGE_FILE_NAME fmt-${FMT_VERSION}) + set(CPACK_PACKAGE_NAME fmt) + set(CPACK_RESOURCE_FILE_README ${PROJECT_SOURCE_DIR}/README.md) + include(CPack) +endif () diff --git a/c/vendor/fmt/CONTRIBUTING.md b/c/vendor/fmt/CONTRIBUTING.md new file mode 100644 index 0000000000..b82f145069 --- /dev/null +++ b/c/vendor/fmt/CONTRIBUTING.md @@ -0,0 +1,20 @@ +Contributing to {fmt} +===================== + +By submitting a pull request or a patch, you represent that you have the right +to license your contribution to the {fmt} project owners and the community, +agree that your contributions are licensed under the {fmt} license, and agree +to future changes to the licensing. + +All C++ code must adhere to [Google C++ Style Guide]( +https://google.github.io/styleguide/cppguide.html) with the following +exceptions: + +* Exceptions are permitted +* snake_case should be used instead of UpperCamelCase for function and type + names + +All documentation must adhere to the [Google Developer Documentation Style +Guide](https://developers.google.com/style). + +Thanks for contributing! diff --git a/c/vendor/fmt/ChangeLog.md b/c/vendor/fmt/ChangeLog.md new file mode 100644 index 0000000000..515f9fdc1d --- /dev/null +++ b/c/vendor/fmt/ChangeLog.md @@ -0,0 +1,5533 @@ +# 10.2.1 - 2024-01-03 + +- Fixed ABI compatibility with earlier 10.x versions + (https://github.com/fmtlib/fmt/pull/3786). Thanks @saraedum. + +# 10.2.0 - 2024-01-01 + +- Added support for the `%j` specifier (the number of days) for + `std::chrono::duration` (https://github.com/fmtlib/fmt/issues/3643, + https://github.com/fmtlib/fmt/pull/3732). Thanks @intelfx. + +- Added support for the chrono suffix for days and changed + the suffix for minutes from "m" to the correct "min" + (https://github.com/fmtlib/fmt/issues/3662, + https://github.com/fmtlib/fmt/pull/3664). + For example ([godbolt](https://godbolt.org/z/9KhMnq9ba)): + + ```c++ + #include + + int main() { + fmt::print("{}\n", std::chrono::days(42)); // prints "42d" + } + ``` + + Thanks @Richardk2n. + +- Fixed an overflow in `std::chrono::time_point` formatting with large dates + (https://github.com/fmtlib/fmt/issues/3725, + https://github.com/fmtlib/fmt/pull/3727). Thanks @cschreib. + +- Added a formatter for `std::source_location` + (https://github.com/fmtlib/fmt/pull/3730). + For example ([godbolt](https://godbolt.org/z/YajfKjhhr)): + + ```c++ + #include + #include + + int main() { + fmt::print("{}\n", std::source_location::current()); + } + ``` + + prints + + ``` + /app/example.cpp:5:51: int main() + ``` + + Thanks @felix642. + +- Added a formatter for `std::bitset` + (https://github.com/fmtlib/fmt/pull/3660). + For example ([godbolt](https://godbolt.org/z/bdEaGeYxe)): + + ```c++ + #include + #include + + int main() { + fmt::print("{}\n", std::bitset<6>(42)); // prints "101010" + } + ``` + + Thanks @muggenhor. + +- Added an experimental `nested_formatter` that provides an easy way of + applying a formatter to one or more subobjects while automatically handling + width, fill and alignment. For example: + + ```c++ + #include + + struct point { + double x, y; + }; + + template <> + struct fmt::formatter : nested_formatter { + auto format(point p, format_context& ctx) const { + return write_padded(ctx, [=](auto out) { + return format_to(out, "({}, {})", nested(p.x), nested(p.y)); + }); + } + }; + + int main() { + fmt::print("[{:>20.2f}]", point{1, 2}); + } + ``` + + prints + + ``` + [ (1.00, 2.00)] + ``` + +- Added the generic representation (`g`) to `std::filesystem::path` + (https://github.com/fmtlib/fmt/issues/3715, + https://github.com/fmtlib/fmt/pull/3729). For example: + + ```c++ + #include + #include + + int main() { + fmt::print("{:g}\n", std::filesystem::path("C:\\foo")); + } + ``` + + prints `"C:/foo"` on Windows. + + Thanks @js324. + +- Made `format_as` work with references + (https://github.com/fmtlib/fmt/pull/3739). Thanks @tchaikov. + +- Fixed formatting of invalid UTF-8 with precision + (https://github.com/fmtlib/fmt/issues/3284). + +- Fixed an inconsistency between `fmt::to_string` and `fmt::format` + (https://github.com/fmtlib/fmt/issues/3684). + +- Disallowed unsafe uses of `fmt::styled` + (https://github.com/fmtlib/fmt/issues/3625): + + ```c++ + auto s = fmt::styled(std::string("dangle"), fmt::emphasis::bold); + fmt::print("{}\n", s); // compile error + ``` + + Pass `fmt::styled(...)` as a parameter instead. + +- Added a null check when formatting a C string with the `s` specifier + (https://github.com/fmtlib/fmt/issues/3706). + +- Disallowed the `c` specifier for `bool` + (https://github.com/fmtlib/fmt/issues/3726, + https://github.com/fmtlib/fmt/pull/3734). Thanks @js324. + +- Made the default formatting unlocalized in `fmt::ostream_formatter` for + consistency with the rest of the library + (https://github.com/fmtlib/fmt/issues/3460). + +- Fixed localized formatting in bases other than decimal + (https://github.com/fmtlib/fmt/issues/3693, + https://github.com/fmtlib/fmt/pull/3750). Thanks @js324. + +- Fixed a performance regression in experimental `fmt::ostream::print` + (https://github.com/fmtlib/fmt/issues/3674). + +- Added synchronization with the underlying output stream when writing to + the Windows console + (https://github.com/fmtlib/fmt/pull/3668, + https://github.com/fmtlib/fmt/issues/3688, + https://github.com/fmtlib/fmt/pull/3689). + Thanks @Roman-Koshelev and @dimztimz. + +- Changed to only export `format_error` when {fmt} is built as a shared + library (https://github.com/fmtlib/fmt/issues/3626, + https://github.com/fmtlib/fmt/pull/3627). Thanks @phprus. + +- Made `fmt::streamed` `constexpr`. + (https://github.com/fmtlib/fmt/pull/3650). Thanks @muggenhor. + +- Enabled `consteval` on older versions of MSVC + (https://github.com/fmtlib/fmt/pull/3757). Thanks @phprus. + +- Added an option to build without `wchar_t` support on Windows + (https://github.com/fmtlib/fmt/issues/3631, + https://github.com/fmtlib/fmt/pull/3636). Thanks @glebm. + +- Improved build and CI configuration + (https://github.com/fmtlib/fmt/pull/3679, + https://github.com/fmtlib/fmt/issues/3701, + https://github.com/fmtlib/fmt/pull/3702, + https://github.com/fmtlib/fmt/pull/3749). + Thanks @jcar87, @pklima and @tchaikov. + +- Fixed various warnings, compilation and test issues + (https://github.com/fmtlib/fmt/issues/3607, + https://github.com/fmtlib/fmt/pull/3610, + https://github.com/fmtlib/fmt/pull/3624, + https://github.com/fmtlib/fmt/pull/3630, + https://github.com/fmtlib/fmt/pull/3634, + https://github.com/fmtlib/fmt/pull/3638, + https://github.com/fmtlib/fmt/issues/3645, + https://github.com/fmtlib/fmt/issues/3646, + https://github.com/fmtlib/fmt/pull/3647, + https://github.com/fmtlib/fmt/pull/3652, + https://github.com/fmtlib/fmt/issues/3654, + https://github.com/fmtlib/fmt/pull/3663, + https://github.com/fmtlib/fmt/issues/3670, + https://github.com/fmtlib/fmt/pull/3680, + https://github.com/fmtlib/fmt/issues/3694, + https://github.com/fmtlib/fmt/pull/3695, + https://github.com/fmtlib/fmt/pull/3699, + https://github.com/fmtlib/fmt/issues/3705, + https://github.com/fmtlib/fmt/issues/3710, + https://github.com/fmtlib/fmt/issues/3712, + https://github.com/fmtlib/fmt/pull/3713, + https://github.com/fmtlib/fmt/issues/3714, + https://github.com/fmtlib/fmt/pull/3716, + https://github.com/fmtlib/fmt/pull/3723, + https://github.com/fmtlib/fmt/issues/3738, + https://github.com/fmtlib/fmt/issues/3740, + https://github.com/fmtlib/fmt/pull/3741, + https://github.com/fmtlib/fmt/pull/3743, + https://github.com/fmtlib/fmt/issues/3745, + https://github.com/fmtlib/fmt/pull/3747, + https://github.com/fmtlib/fmt/pull/3748, + https://github.com/fmtlib/fmt/pull/3751, + https://github.com/fmtlib/fmt/pull/3754, + https://github.com/fmtlib/fmt/pull/3755, + https://github.com/fmtlib/fmt/issues/3760, + https://github.com/fmtlib/fmt/pull/3762, + https://github.com/fmtlib/fmt/issues/3763, + https://github.com/fmtlib/fmt/pull/3764, + https://github.com/fmtlib/fmt/issues/3774, + https://github.com/fmtlib/fmt/pull/3779). + Thanks @danakj, @vinayyadav3016, @cyyever, @phprus, @qimiko, @saschasc, + @gsjaardema, @lazka, @Zhaojun-Liu, @carlsmedstad, @hotwatermorning, + @cptFracassa, @kuguma, @PeterJohnson, @H1X4Dev, @asantoni, @eltociear, + @msimberg, @tchaikov, @waywardmonkeys. + +- Improved documentation and README + (https://github.com/fmtlib/fmt/issues/2086, + https://github.com/fmtlib/fmt/issues/3637, + https://github.com/fmtlib/fmt/pull/3642, + https://github.com/fmtlib/fmt/pull/3653, + https://github.com/fmtlib/fmt/pull/3655, + https://github.com/fmtlib/fmt/pull/3661, + https://github.com/fmtlib/fmt/issues/3673, + https://github.com/fmtlib/fmt/pull/3677, + https://github.com/fmtlib/fmt/pull/3737, + https://github.com/fmtlib/fmt/issues/3742, + https://github.com/fmtlib/fmt/pull/3744). + Thanks @idzm, @perlun, @joycebrum, @fennewald, @reinhardt1053, @GeorgeLS. + +- Updated CI dependencies + (https://github.com/fmtlib/fmt/pull/3615, + https://github.com/fmtlib/fmt/pull/3622, + https://github.com/fmtlib/fmt/pull/3623, + https://github.com/fmtlib/fmt/pull/3666, + https://github.com/fmtlib/fmt/pull/3696, + https://github.com/fmtlib/fmt/pull/3697, + https://github.com/fmtlib/fmt/pull/3759, + https://github.com/fmtlib/fmt/pull/3782). + +# 10.1.1 - 2023-08-28 + +- Added formatters for `std::atomic` and `atomic_flag` + (https://github.com/fmtlib/fmt/pull/3574, + https://github.com/fmtlib/fmt/pull/3594). + Thanks @wangzw and @AlexGuteniev. +- Fixed an error about partial specialization of `formatter` + after instantiation when compiled with gcc and C++20 + (https://github.com/fmtlib/fmt/issues/3584). +- Fixed compilation as a C++20 module with gcc and clang + (https://github.com/fmtlib/fmt/issues/3587, + https://github.com/fmtlib/fmt/pull/3597, + https://github.com/fmtlib/fmt/pull/3605). + Thanks @MathewBensonCode. +- Made `fmt::to_string` work with types that have `format_as` + overloads (https://github.com/fmtlib/fmt/pull/3575). Thanks @phprus. +- Made `formatted_size` work with integral format specifiers at + compile time (https://github.com/fmtlib/fmt/pull/3591). + Thanks @elbeno. +- Fixed a warning about the `no_unique_address` attribute on clang-cl + (https://github.com/fmtlib/fmt/pull/3599). Thanks @lukester1975. +- Improved compatibility with the legacy GBK encoding + (https://github.com/fmtlib/fmt/issues/3598, + https://github.com/fmtlib/fmt/pull/3599). Thanks @YuHuanTin. +- Added OpenSSF Scorecard analysis + (https://github.com/fmtlib/fmt/issues/3530, + https://github.com/fmtlib/fmt/pull/3571). Thanks @joycebrum. +- Updated CI dependencies + (https://github.com/fmtlib/fmt/pull/3591, + https://github.com/fmtlib/fmt/pull/3592, + https://github.com/fmtlib/fmt/pull/3593, + https://github.com/fmtlib/fmt/pull/3602). + +# 10.1.0 - 2023-08-12 + +- Optimized format string compilation resulting in up to 40% speed up + in compiled `format_to` and \~4x speed up in compiled `format_to_n` + on a concatenation benchmark + (https://github.com/fmtlib/fmt/issues/3133, + https://github.com/fmtlib/fmt/issues/3484). + + {fmt} 10.0: + + --------------------------------------------------------- + Benchmark Time CPU Iterations + --------------------------------------------------------- + BM_format_to 78.9 ns 78.9 ns 8881746 + BM_format_to_n 568 ns 568 ns 1232089 + + {fmt} 10.1: + + --------------------------------------------------------- + Benchmark Time CPU Iterations + --------------------------------------------------------- + BM_format_to 54.9 ns 54.9 ns 12727944 + BM_format_to_n 133 ns 133 ns 5257795 + +- Optimized storage of an empty allocator in `basic_memory_buffer` + (https://github.com/fmtlib/fmt/pull/3485). Thanks @Minty-Meeo. + +- Added formatters for proxy references to elements of + `std::vector` and `std::bitset` + (https://github.com/fmtlib/fmt/issues/3567, + https://github.com/fmtlib/fmt/pull/3570). For example + ([godbolt](https://godbolt.org/z/zYb79Pvn8)): + + ```c++ + #include + #include + + int main() { + auto v = std::vector{true}; + fmt::print("{}", v[0]); + } + ``` + + Thanks @phprus and @felix642. + +- Fixed an ambiguous formatter specialization for containers that look + like container adaptors such as `boost::flat_set` + (https://github.com/fmtlib/fmt/issues/3556, + https://github.com/fmtlib/fmt/pull/3561). Thanks @5chmidti. + +- Fixed compilation when formatting durations not convertible from + `std::chrono::seconds` + (https://github.com/fmtlib/fmt/pull/3430). Thanks @patlkli. + +- Made the `formatter` specialization for `char*` const-correct + (https://github.com/fmtlib/fmt/pull/3432). Thanks @timsong-cpp. + +- Made `{}` and `{:}` handled consistently during compile-time checks + (https://github.com/fmtlib/fmt/issues/3526). + +- Disallowed passing temporaries to `make_format_args` to improve API + safety by preventing dangling references. + +- Improved the compile-time error for unformattable types + (https://github.com/fmtlib/fmt/pull/3478). Thanks @BRevzin. + +- Improved the floating-point formatter + (https://github.com/fmtlib/fmt/pull/3448, + https://github.com/fmtlib/fmt/pull/3450). + Thanks @florimond-collette. + +- Fixed handling of precision for `long double` larger than 64 bits. + (https://github.com/fmtlib/fmt/issues/3539, + https://github.com/fmtlib/fmt/issues/3564). + +- Made floating-point and chrono tests less platform-dependent + (https://github.com/fmtlib/fmt/issues/3337, + https://github.com/fmtlib/fmt/issues/3433, + https://github.com/fmtlib/fmt/pull/3434). Thanks @phprus. + +- Removed the remnants of the Grisu floating-point formatter that has + been replaced by Dragonbox in earlier versions. + +- Added `throw_format_error` to the public API + (https://github.com/fmtlib/fmt/pull/3551). Thanks @mjerabek. + +- Made `FMT_THROW` assert even if assertions are disabled when + compiling with exceptions disabled + (https://github.com/fmtlib/fmt/issues/3418, + https://github.com/fmtlib/fmt/pull/3439). Thanks @BRevzin. + +- Made `format_as` and `std::filesystem::path` formatter work with + exotic code unit types. + (https://github.com/fmtlib/fmt/pull/3457, + https://github.com/fmtlib/fmt/pull/3476). Thanks @gix and @hmbj. + +- Added support for the `?` format specifier to + `std::filesystem::path` and made the default unescaped for + consistency with strings. + +- Deprecated the wide stream overload of `printf`. + +- Removed unused `basic_printf_parse_context`. + +- Improved RTTI detection used when formatting exceptions + (https://github.com/fmtlib/fmt/pull/3468). Thanks @danakj. + +- Improved compatibility with VxWorks7 + (https://github.com/fmtlib/fmt/pull/3467). Thanks @wenshan1. + +- Improved documentation + (https://github.com/fmtlib/fmt/issues/3174, + https://github.com/fmtlib/fmt/issues/3423, + https://github.com/fmtlib/fmt/pull/3454, + https://github.com/fmtlib/fmt/issues/3458, + https://github.com/fmtlib/fmt/pull/3461, + https://github.com/fmtlib/fmt/issues/3487, + https://github.com/fmtlib/fmt/pull/3515). + Thanks @zencatalyst, @rlalik and @mikecrowe. + +- Improved build and CI configurations + (https://github.com/fmtlib/fmt/issues/3449, + https://github.com/fmtlib/fmt/pull/3451, + https://github.com/fmtlib/fmt/pull/3452, + https://github.com/fmtlib/fmt/pull/3453, + https://github.com/fmtlib/fmt/pull/3459, + https://github.com/fmtlib/fmt/issues/3481, + https://github.com/fmtlib/fmt/pull/3486, + https://github.com/fmtlib/fmt/issues/3489, + https://github.com/fmtlib/fmt/pull/3496, + https://github.com/fmtlib/fmt/issues/3517, + https://github.com/fmtlib/fmt/pull/3523, + https://github.com/fmtlib/fmt/pull/3563). + Thanks @joycebrum, @glebm, @phprus, @petrmanek, @setoye and @abouvier. + +- Fixed various warnings and compilation issues + (https://github.com/fmtlib/fmt/issues/3408, + https://github.com/fmtlib/fmt/issues/3424, + https://github.com/fmtlib/fmt/issues/3444, + https://github.com/fmtlib/fmt/pull/3446, + https://github.com/fmtlib/fmt/pull/3475, + https://github.com/fmtlib/fmt/pull/3482, + https://github.com/fmtlib/fmt/issues/3492, + https://github.com/fmtlib/fmt/pull/3493, + https://github.com/fmtlib/fmt/pull/3508, + https://github.com/fmtlib/fmt/issues/3509, + https://github.com/fmtlib/fmt/issues/3533, + https://github.com/fmtlib/fmt/pull/3542, + https://github.com/fmtlib/fmt/issues/3543, + https://github.com/fmtlib/fmt/issues/3540, + https://github.com/fmtlib/fmt/pull/3544, + https://github.com/fmtlib/fmt/issues/3548, + https://github.com/fmtlib/fmt/pull/3549, + https://github.com/fmtlib/fmt/pull/3550, + https://github.com/fmtlib/fmt/pull/3552). + Thanks @adesitter, @hmbj, @Minty-Meeo, @phprus, @TobiSchluter, + @kieranclancy, @alexeedm, @jurihock, @Ozomahtli and @razaqq. + +# 10.0.0 - 2023-05-09 + +- Replaced Grisu with a new floating-point formatting algorithm for + given precision (https://github.com/fmtlib/fmt/issues/3262, + https://github.com/fmtlib/fmt/issues/2750, + https://github.com/fmtlib/fmt/pull/3269, + https://github.com/fmtlib/fmt/pull/3276). The new algorithm + is based on Dragonbox already used for the shortest representation + and gives substantial performance improvement: + + ![](https://user-images.githubusercontent.com/33922675/211956670-84891a09-6867-47d9-82fc-3230da7abe0f.png) + + - Red: new algorithm + - Green: new algorithm with `FMT_USE_FULL_CACHE_DRAGONBOX` defined + to 1 + - Blue: old algorithm + + Thanks @jk-jeon. + +- Replaced `snprintf`-based hex float formatter with an internal + implementation (https://github.com/fmtlib/fmt/pull/3179, + https://github.com/fmtlib/fmt/pull/3203). This removes the + last usage of `s(n)printf` in {fmt}. Thanks @phprus. + +- Fixed alignment of floating-point numbers with localization + (https://github.com/fmtlib/fmt/issues/3263, + https://github.com/fmtlib/fmt/pull/3272). Thanks @ShawnZhong. + +- Made handling of `#` consistent with `std::format`. + +- Improved C++20 module support + (https://github.com/fmtlib/fmt/pull/3134, + https://github.com/fmtlib/fmt/pull/3254, + https://github.com/fmtlib/fmt/pull/3386, + https://github.com/fmtlib/fmt/pull/3387, + https://github.com/fmtlib/fmt/pull/3388, + https://github.com/fmtlib/fmt/pull/3392, + https://github.com/fmtlib/fmt/pull/3397, + https://github.com/fmtlib/fmt/pull/3399, + https://github.com/fmtlib/fmt/pull/3400). + Thanks @laitingsheng, @Orvid and @DanielaE. + +- Switched to the [modules CMake library](https://github.com/vitaut/modules) + which allows building {fmt} as a C++20 module with clang: + + CXX=clang++ cmake -DFMT_MODULE=ON . + make + +- Made `format_as` work with any user-defined type and not just enums. + For example ([godbolt](https://godbolt.org/z/b7rqhq5Kh)): + + ```c++ + #include + + struct floaty_mc_floatface { + double value; + }; + + auto format_as(floaty_mc_floatface f) { return f.value; } + + int main() { + fmt::print("{:8}\n", floaty_mc_floatface{0.42}); // prints " 0.42" + } + ``` + +- Removed deprecated implicit conversions for enums and conversions to + primitive types for compatibility with `std::format` and to prevent + potential ODR violations. Use `format_as` instead. + +- Added support for fill, align and width to the time point formatter + (https://github.com/fmtlib/fmt/issues/3237, + https://github.com/fmtlib/fmt/pull/3260, + https://github.com/fmtlib/fmt/pull/3275). For example + ([godbolt](https://godbolt.org/z/rKP6MGz6c)): + + ```c++ + #include + + int main() { + // prints " 2023" + fmt::print("{:>8%Y}\n", std::chrono::system_clock::now()); + } + ``` + + Thanks @ShawnZhong. + +- Implemented formatting of subseconds + (https://github.com/fmtlib/fmt/issues/2207, + https://github.com/fmtlib/fmt/issues/3117, + https://github.com/fmtlib/fmt/pull/3115, + https://github.com/fmtlib/fmt/pull/3143, + https://github.com/fmtlib/fmt/pull/3144, + https://github.com/fmtlib/fmt/pull/3349). For example + ([godbolt](https://godbolt.org/z/45738oGEo)): + + ```c++ + #include + + int main() { + // prints 01.234567 + fmt::print("{:%S}\n", std::chrono::microseconds(1234567)); + } + ``` + + Thanks @patrickroocks @phprus and @BRevzin. + +- Added precision support to `%S` + (https://github.com/fmtlib/fmt/pull/3148). Thanks @SappyJoy + +- Added support for `std::utc_time` + (https://github.com/fmtlib/fmt/issues/3098, + https://github.com/fmtlib/fmt/pull/3110). Thanks @patrickroocks. + +- Switched formatting of `std::chrono::system_clock` from local time + to UTC for compatibility with the standard + (https://github.com/fmtlib/fmt/issues/3199, + https://github.com/fmtlib/fmt/pull/3230). Thanks @ned14. + +- Added support for `%Ez` and `%Oz` to chrono formatters. + (https://github.com/fmtlib/fmt/issues/3220, + https://github.com/fmtlib/fmt/pull/3222). Thanks @phprus. + +- Improved validation of format specifiers for `std::chrono::duration` + (https://github.com/fmtlib/fmt/issues/3219, + https://github.com/fmtlib/fmt/pull/3232). Thanks @ShawnZhong. + +- Fixed formatting of time points before the epoch + (https://github.com/fmtlib/fmt/issues/3117, + https://github.com/fmtlib/fmt/pull/3261). For example + ([godbolt](https://godbolt.org/z/f7bcznb3W)): + + ```c++ + #include + + int main() { + auto t = std::chrono::system_clock::from_time_t(0) - + std::chrono::milliseconds(250); + fmt::print("{:%S}\n", t); // prints 59.750000000 + } + ``` + + Thanks @ShawnZhong. + +- Experimental: implemented glibc extension for padding seconds, + minutes and hours + (https://github.com/fmtlib/fmt/issues/2959, + https://github.com/fmtlib/fmt/pull/3271). Thanks @ShawnZhong. + +- Added a formatter for `std::exception` + (https://github.com/fmtlib/fmt/issues/2977, + https://github.com/fmtlib/fmt/issues/3012, + https://github.com/fmtlib/fmt/pull/3062, + https://github.com/fmtlib/fmt/pull/3076, + https://github.com/fmtlib/fmt/pull/3119). For example + ([godbolt](https://godbolt.org/z/8xoWGs9e4)): + + ```c++ + #include + #include + + int main() { + try { + std::vector().at(0); + } catch(const std::exception& e) { + fmt::print("{}", e); + } + } + ``` + + prints: + + vector::_M_range_check: __n (which is 0) >= this->size() (which is 0) + + on libstdc++. Thanks @zach2good and @phprus. + +- Moved `std::error_code` formatter from `fmt/os.h` to `fmt/std.h`. + (https://github.com/fmtlib/fmt/pull/3125). Thanks @phprus. + +- Added formatters for standard container adapters: + `std::priority_queue`, `std::queue` and `std::stack` + (https://github.com/fmtlib/fmt/issues/3215, + https://github.com/fmtlib/fmt/pull/3279). For example + ([godbolt](https://godbolt.org/z/74h1xY9qK)): + + ```c++ + #include + #include + #include + + int main() { + auto s = std::stack>(); + for (auto b: {true, false, true}) s.push(b); + fmt::print("{}\n", s); // prints [true, false, true] + } + ``` + + Thanks @ShawnZhong. + +- Added a formatter for `std::optional` to `fmt/std.h` + (https://github.com/fmtlib/fmt/issues/1367, + https://github.com/fmtlib/fmt/pull/3303). + Thanks @tom-huntington. + +- Fixed formatting of valueless by exception variants + (https://github.com/fmtlib/fmt/pull/3347). Thanks @TheOmegaCarrot. + +- Made `fmt::ptr` accept `unique_ptr` with a custom deleter + (https://github.com/fmtlib/fmt/pull/3177). Thanks @hmbj. + +- Fixed formatting of noncopyable ranges and nested ranges of chars + (https://github.com/fmtlib/fmt/pull/3158 + https://github.com/fmtlib/fmt/issues/3286, + https://github.com/fmtlib/fmt/pull/3290). Thanks @BRevzin. + +- Fixed issues with formatting of paths and ranges of paths + (https://github.com/fmtlib/fmt/issues/3319, + https://github.com/fmtlib/fmt/pull/3321 + https://github.com/fmtlib/fmt/issues/3322). Thanks @phprus. + +- Improved handling of invalid Unicode in paths. + +- Enabled compile-time checks on Apple clang 14 and later + (https://github.com/fmtlib/fmt/pull/3331). Thanks @cloyce. + +- Improved compile-time checks of named arguments + (https://github.com/fmtlib/fmt/issues/3105, + https://github.com/fmtlib/fmt/pull/3214). Thanks @rbrich. + +- Fixed formatting when both alignment and `0` are given + (https://github.com/fmtlib/fmt/issues/3236, + https://github.com/fmtlib/fmt/pull/3248). Thanks @ShawnZhong. + +- Improved Unicode support in the experimental file API on Windows + (https://github.com/fmtlib/fmt/issues/3234, + https://github.com/fmtlib/fmt/pull/3293). Thanks @Fros1er. + +- Unified UTF transcoding + (https://github.com/fmtlib/fmt/pull/3416). Thanks @phprus. + +- Added support for UTF-8 digit separators via an experimental locale + facet (https://github.com/fmtlib/fmt/issues/1861). For + example ([godbolt](https://godbolt.org/z/f7bcznb3W)): + + ```c++ + auto loc = std::locale( + std::locale(), new fmt::format_facet("’")); + auto s = fmt::format(loc, "{:L}", 1000); + ``` + + where `’` is U+2019 used as a digit separator in the de_CH locale. + +- Added an overload of `formatted_size` that takes a locale + (https://github.com/fmtlib/fmt/issues/3084, + https://github.com/fmtlib/fmt/pull/3087). Thanks @gerboengels. + +- Removed the deprecated `FMT_DEPRECATED_OSTREAM`. + +- Fixed a UB when using a null `std::string_view` with + `fmt::to_string` or format string compilation + (https://github.com/fmtlib/fmt/issues/3241, + https://github.com/fmtlib/fmt/pull/3244). Thanks @phprus. + +- Added `starts_with` to the fallback `string_view` implementation + (https://github.com/fmtlib/fmt/pull/3080). Thanks @phprus. + +- Added `fmt::basic_format_string::get()` for compatibility with + `basic_format_string` + (https://github.com/fmtlib/fmt/pull/3111). Thanks @huangqinjin. + +- Added `println` for compatibility with C++23 + (https://github.com/fmtlib/fmt/pull/3267). Thanks @ShawnZhong. + +- Renamed the `FMT_EXPORT` macro for shared library usage to + `FMT_LIB_EXPORT`. + +- Improved documentation + (https://github.com/fmtlib/fmt/issues/3108, + https://github.com/fmtlib/fmt/issues/3169, + https://github.com/fmtlib/fmt/pull/3243). + https://github.com/fmtlib/fmt/pull/3404). + Thanks @Cleroth and @Vertexwahn. + +- Improved build configuration and tests + (https://github.com/fmtlib/fmt/pull/3118, + https://github.com/fmtlib/fmt/pull/3120, + https://github.com/fmtlib/fmt/pull/3188, + https://github.com/fmtlib/fmt/issues/3189, + https://github.com/fmtlib/fmt/pull/3198, + https://github.com/fmtlib/fmt/pull/3205, + https://github.com/fmtlib/fmt/pull/3207, + https://github.com/fmtlib/fmt/pull/3210, + https://github.com/fmtlib/fmt/pull/3240, + https://github.com/fmtlib/fmt/pull/3256, + https://github.com/fmtlib/fmt/pull/3264, + https://github.com/fmtlib/fmt/issues/3299, + https://github.com/fmtlib/fmt/pull/3302, + https://github.com/fmtlib/fmt/pull/3312, + https://github.com/fmtlib/fmt/issues/3317, + https://github.com/fmtlib/fmt/pull/3328, + https://github.com/fmtlib/fmt/pull/3333, + https://github.com/fmtlib/fmt/pull/3369, + https://github.com/fmtlib/fmt/issues/3373, + https://github.com/fmtlib/fmt/pull/3395, + https://github.com/fmtlib/fmt/pull/3406, + https://github.com/fmtlib/fmt/pull/3411). + Thanks @dimztimz, @phprus, @DavidKorczynski, @ChrisThrasher, + @FrancoisCarouge, @kennyweiss, @luzpaz, @codeinred, @Mixaill, @joycebrum, + @kevinhwang and @Vertexwahn. + +- Fixed a regression in handling empty format specifiers after a colon + (`{:}`) (https://github.com/fmtlib/fmt/pull/3086). Thanks @oxidase. + +- Worked around a broken implementation of + `std::is_constant_evaluated` in some versions of libstdc++ on clang + (https://github.com/fmtlib/fmt/issues/3247, + https://github.com/fmtlib/fmt/pull/3281). Thanks @phprus. + +- Fixed formatting of volatile variables + (https://github.com/fmtlib/fmt/pull/3068). + +- Fixed various warnings and compilation issues + (https://github.com/fmtlib/fmt/pull/3057, + https://github.com/fmtlib/fmt/pull/3066, + https://github.com/fmtlib/fmt/pull/3072, + https://github.com/fmtlib/fmt/pull/3082, + https://github.com/fmtlib/fmt/pull/3091, + https://github.com/fmtlib/fmt/issues/3092, + https://github.com/fmtlib/fmt/pull/3093, + https://github.com/fmtlib/fmt/pull/3095, + https://github.com/fmtlib/fmt/issues/3096, + https://github.com/fmtlib/fmt/pull/3097, + https://github.com/fmtlib/fmt/issues/3128, + https://github.com/fmtlib/fmt/pull/3129, + https://github.com/fmtlib/fmt/pull/3137, + https://github.com/fmtlib/fmt/pull/3139, + https://github.com/fmtlib/fmt/issues/3140, + https://github.com/fmtlib/fmt/pull/3142, + https://github.com/fmtlib/fmt/issues/3149, + https://github.com/fmtlib/fmt/pull/3150, + https://github.com/fmtlib/fmt/issues/3154, + https://github.com/fmtlib/fmt/issues/3163, + https://github.com/fmtlib/fmt/issues/3178, + https://github.com/fmtlib/fmt/pull/3184, + https://github.com/fmtlib/fmt/pull/3196, + https://github.com/fmtlib/fmt/issues/3204, + https://github.com/fmtlib/fmt/pull/3206, + https://github.com/fmtlib/fmt/pull/3208, + https://github.com/fmtlib/fmt/issues/3213, + https://github.com/fmtlib/fmt/pull/3216, + https://github.com/fmtlib/fmt/issues/3224, + https://github.com/fmtlib/fmt/issues/3226, + https://github.com/fmtlib/fmt/issues/3228, + https://github.com/fmtlib/fmt/pull/3229, + https://github.com/fmtlib/fmt/pull/3259, + https://github.com/fmtlib/fmt/issues/3274, + https://github.com/fmtlib/fmt/issues/3287, + https://github.com/fmtlib/fmt/pull/3288, + https://github.com/fmtlib/fmt/issues/3292, + https://github.com/fmtlib/fmt/pull/3295, + https://github.com/fmtlib/fmt/pull/3296, + https://github.com/fmtlib/fmt/issues/3298, + https://github.com/fmtlib/fmt/issues/3325, + https://github.com/fmtlib/fmt/pull/3326, + https://github.com/fmtlib/fmt/issues/3334, + https://github.com/fmtlib/fmt/issues/3342, + https://github.com/fmtlib/fmt/pull/3343, + https://github.com/fmtlib/fmt/issues/3351, + https://github.com/fmtlib/fmt/pull/3352, + https://github.com/fmtlib/fmt/pull/3362, + https://github.com/fmtlib/fmt/issues/3365, + https://github.com/fmtlib/fmt/pull/3366, + https://github.com/fmtlib/fmt/pull/3374, + https://github.com/fmtlib/fmt/issues/3377, + https://github.com/fmtlib/fmt/pull/3378, + https://github.com/fmtlib/fmt/issues/3381, + https://github.com/fmtlib/fmt/pull/3398, + https://github.com/fmtlib/fmt/pull/3413, + https://github.com/fmtlib/fmt/issues/3415). + Thanks @phprus, @gsjaardema, @NewbieOrange, @EngineLessCC, @asmaloney, + @HazardyKnusperkeks, @sergiud, @Youw, @thesmurph, @czudziakm, + @Roman-Koshelev, @chronoxor, @ShawnZhong, @russelltg, @glebm, @tmartin-gh, + @Zhaojun-Liu, @louiswins and @mogemimi. + +# 9.1.0 - 2022-08-27 + +- `fmt::formatted_size` now works at compile time + (https://github.com/fmtlib/fmt/pull/3026). For example + ([godbolt](https://godbolt.org/z/1MW5rMdf8)): + + ```c++ + #include + + int main() { + using namespace fmt::literals; + constexpr size_t n = fmt::formatted_size("{}"_cf, 42); + fmt::print("{}\n", n); // prints 2 + } + ``` + + Thanks @marksantaniello. + +- Fixed handling of invalid UTF-8 + (https://github.com/fmtlib/fmt/pull/3038, + https://github.com/fmtlib/fmt/pull/3044, + https://github.com/fmtlib/fmt/pull/3056). + Thanks @phprus and @skeeto. + +- Improved Unicode support in `ostream` overloads of `print` + (https://github.com/fmtlib/fmt/pull/2994, + https://github.com/fmtlib/fmt/pull/3001, + https://github.com/fmtlib/fmt/pull/3025). Thanks @dimztimz. + +- Fixed handling of the sign specifier in localized formatting on + systems with 32-bit `wchar_t` + (https://github.com/fmtlib/fmt/issues/3041). + +- Added support for wide streams to `fmt::streamed` + (https://github.com/fmtlib/fmt/pull/2994). Thanks @phprus. + +- Added the `n` specifier that disables the output of delimiters when + formatting ranges (https://github.com/fmtlib/fmt/pull/2981, + https://github.com/fmtlib/fmt/pull/2983). For example + ([godbolt](https://godbolt.org/z/roKqGdj8c)): + + ```c++ + #include + #include + + int main() { + auto v = std::vector{1, 2, 3}; + fmt::print("{:n}\n", v); // prints 1, 2, 3 + } + ``` + + Thanks @BRevzin. + +- Worked around problematic `std::string_view` constructors introduced + in C++23 (https://github.com/fmtlib/fmt/issues/3030, + https://github.com/fmtlib/fmt/issues/3050). Thanks @strega-nil-ms. + +- Improve handling (exclusion) of recursive ranges + (https://github.com/fmtlib/fmt/issues/2968, + https://github.com/fmtlib/fmt/pull/2974). Thanks @Dani-Hub. + +- Improved error reporting in format string compilation + (https://github.com/fmtlib/fmt/issues/3055). + +- Improved the implementation of + [Dragonbox](https://github.com/jk-jeon/dragonbox), the algorithm + used for the default floating-point formatting + (https://github.com/fmtlib/fmt/pull/2984). Thanks @jk-jeon. + +- Fixed issues with floating-point formatting on exotic platforms. + +- Improved the implementation of chrono formatting + (https://github.com/fmtlib/fmt/pull/3010). Thanks @phprus. + +- Improved documentation + (https://github.com/fmtlib/fmt/pull/2966, + https://github.com/fmtlib/fmt/pull/3009, + https://github.com/fmtlib/fmt/issues/3020, + https://github.com/fmtlib/fmt/pull/3037). + Thanks @mwinterb, @jcelerier and @remiburtin. + +- Improved build configuration + (https://github.com/fmtlib/fmt/pull/2991, + https://github.com/fmtlib/fmt/pull/2995, + https://github.com/fmtlib/fmt/issues/3004, + https://github.com/fmtlib/fmt/pull/3007, + https://github.com/fmtlib/fmt/pull/3040). + Thanks @dimztimz and @hwhsu1231. + +- Fixed various warnings and compilation issues + (https://github.com/fmtlib/fmt/issues/2969, + https://github.com/fmtlib/fmt/pull/2971, + https://github.com/fmtlib/fmt/issues/2975, + https://github.com/fmtlib/fmt/pull/2982, + https://github.com/fmtlib/fmt/pull/2985, + https://github.com/fmtlib/fmt/issues/2988, + https://github.com/fmtlib/fmt/issues/2989, + https://github.com/fmtlib/fmt/issues/3000, + https://github.com/fmtlib/fmt/issues/3006, + https://github.com/fmtlib/fmt/issues/3014, + https://github.com/fmtlib/fmt/issues/3015, + https://github.com/fmtlib/fmt/pull/3021, + https://github.com/fmtlib/fmt/issues/3023, + https://github.com/fmtlib/fmt/pull/3024, + https://github.com/fmtlib/fmt/pull/3029, + https://github.com/fmtlib/fmt/pull/3043, + https://github.com/fmtlib/fmt/issues/3052, + https://github.com/fmtlib/fmt/pull/3053, + https://github.com/fmtlib/fmt/pull/3054). + Thanks @h-friederich, @dimztimz, @olupton, @bernhardmgruber and @phprus. + +# 9.0.0 - 2022-07-04 + +- Switched to the internal floating point formatter for all decimal + presentation formats. In particular this results in consistent + rounding on all platforms and removing the `s[n]printf` fallback for + decimal FP formatting. + +- Compile-time floating point formatting no longer requires the + header-only mode. For example + ([godbolt](https://godbolt.org/z/G37PTeG3b)): + + ```c++ + #include + #include + + consteval auto compile_time_dtoa(double value) -> std::array { + auto result = std::array(); + fmt::format_to(result.data(), FMT_COMPILE("{}"), value); + return result; + } + + constexpr auto answer = compile_time_dtoa(0.42); + ``` + + works with the default settings. + +- Improved the implementation of + [Dragonbox](https://github.com/jk-jeon/dragonbox), the algorithm + used for the default floating-point formatting + (https://github.com/fmtlib/fmt/pull/2713, + https://github.com/fmtlib/fmt/pull/2750). Thanks @jk-jeon. + +- Made `fmt::to_string` work with `__float128`. This uses the internal + FP formatter and works even on system without `__float128` support + in `[s]printf`. + +- Disabled automatic `std::ostream` insertion operator (`operator<<`) + discovery when `fmt/ostream.h` is included to prevent ODR + violations. You can get the old behavior by defining + `FMT_DEPRECATED_OSTREAM` but this will be removed in the next major + release. Use `fmt::streamed` or `fmt::ostream_formatter` to enable + formatting via `std::ostream` instead. + +- Added `fmt::ostream_formatter` that can be used to write `formatter` + specializations that perform formatting via `std::ostream`. For + example ([godbolt](https://godbolt.org/z/5sEc5qMsf)): + + ```c++ + #include + + struct date { + int year, month, day; + + friend std::ostream& operator<<(std::ostream& os, const date& d) { + return os << d.year << '-' << d.month << '-' << d.day; + } + }; + + template <> struct fmt::formatter : ostream_formatter {}; + + std::string s = fmt::format("The date is {}", date{2012, 12, 9}); + // s == "The date is 2012-12-9" + ``` + +- Added the `fmt::streamed` function that takes an object and formats + it via `std::ostream`. For example + ([godbolt](https://godbolt.org/z/5G3346G1f)): + + ```c++ + #include + #include + + int main() { + fmt::print("Current thread id: {}\n", + fmt::streamed(std::this_thread::get_id())); + } + ``` + + Note that `fmt/std.h` provides a `formatter` specialization for + `std::thread::id` so you don\'t need to format it via + `std::ostream`. + +- Deprecated implicit conversions of unscoped enums to integers for + consistency with scoped enums. + +- Added an argument-dependent lookup based `format_as` extension API + to simplify formatting of enums. + +- Added experimental `std::variant` formatting support + (https://github.com/fmtlib/fmt/pull/2941). For example + ([godbolt](https://godbolt.org/z/KG9z6cq68)): + + ```c++ + #include + #include + + int main() { + auto v = std::variant(42); + fmt::print("{}\n", v); + } + ``` + + prints: + + variant(42) + + Thanks @jehelset. + +- Added experimental `std::filesystem::path` formatting support + (https://github.com/fmtlib/fmt/issues/2865, + https://github.com/fmtlib/fmt/pull/2902, + https://github.com/fmtlib/fmt/issues/2917, + https://github.com/fmtlib/fmt/pull/2918). For example + ([godbolt](https://godbolt.org/z/o44dMexEb)): + + ```c++ + #include + #include + + int main() { + fmt::print("There is no place like {}.", std::filesystem::path("/home")); + } + ``` + + prints: + + There is no place like "/home". + + Thanks @phprus. + +- Added a `std::thread::id` formatter to `fmt/std.h`. For example + ([godbolt](https://godbolt.org/z/j1azbYf3E)): + + ```c++ + #include + #include + + int main() { + fmt::print("Current thread id: {}\n", std::this_thread::get_id()); + } + ``` + +- Added `fmt::styled` that applies a text style to an individual + argument (https://github.com/fmtlib/fmt/pull/2793). For + example ([godbolt](https://godbolt.org/z/vWGW7v5M6)): + + ```c++ + #include + #include + + int main() { + auto now = std::chrono::system_clock::now(); + fmt::print( + "[{}] {}: {}\n", + fmt::styled(now, fmt::emphasis::bold), + fmt::styled("error", fg(fmt::color::red)), + "something went wrong"); + } + ``` + + prints + + ![](https://user-images.githubusercontent.com/576385/175071215-12809244-dab0-4005-96d8-7cd911c964d5.png) + + Thanks @rbrugo. + +- Made `fmt::print` overload for text styles correctly handle UTF-8 + (https://github.com/fmtlib/fmt/issues/2681, + https://github.com/fmtlib/fmt/pull/2701). Thanks @AlexGuteniev. + +- Fixed Unicode handling when writing to an ostream. + +- Added support for nested specifiers to range formatting + (https://github.com/fmtlib/fmt/pull/2673). For example + ([godbolt](https://godbolt.org/z/xd3Gj38cf)): + + ```c++ + #include + #include + + int main() { + fmt::print("{::#x}\n", std::vector{10, 20, 30}); + } + ``` + + prints `[0xa, 0x14, 0x1e]`. + + Thanks @BRevzin. + +- Implemented escaping of wide strings in ranges + (https://github.com/fmtlib/fmt/pull/2904). Thanks @phprus. + +- Added support for ranges with `begin` / `end` found via the + argument-dependent lookup + (https://github.com/fmtlib/fmt/pull/2807). Thanks @rbrugo. + +- Fixed formatting of certain kinds of ranges of ranges + (https://github.com/fmtlib/fmt/pull/2787). Thanks @BRevzin. + +- Fixed handling of maps with element types other than `std::pair` + (https://github.com/fmtlib/fmt/pull/2944). Thanks @BrukerJWD. + +- Made tuple formatter enabled only if elements are formattable + (https://github.com/fmtlib/fmt/issues/2939, + https://github.com/fmtlib/fmt/pull/2940). Thanks @jehelset. + +- Made `fmt::join` compatible with format string compilation + (https://github.com/fmtlib/fmt/issues/2719, + https://github.com/fmtlib/fmt/pull/2720). Thanks @phprus. + +- Made compile-time checks work with named arguments of custom types + and `std::ostream` `print` overloads + (https://github.com/fmtlib/fmt/issues/2816, + https://github.com/fmtlib/fmt/issues/2817, + https://github.com/fmtlib/fmt/pull/2819). Thanks @timsong-cpp. + +- Removed `make_args_checked` because it is no longer needed for + compile-time checks + (https://github.com/fmtlib/fmt/pull/2760). Thanks @phprus. + +- Removed the following deprecated APIs: `_format`, `arg_join`, the + `format_to` overload that takes a memory buffer, `[v]fprintf` that + takes an `ostream`. + +- Removed the deprecated implicit conversion of `[const] signed char*` + and `[const] unsigned char*` to C strings. + +- Removed the deprecated `fmt/locale.h`. + +- Replaced the deprecated `fileno()` with `descriptor()` in + `buffered_file`. + +- Moved `to_string_view` to the `detail` namespace since it\'s an + implementation detail. + +- Made access mode of a created file consistent with `fopen` by + setting `S_IWGRP` and `S_IWOTH` + (https://github.com/fmtlib/fmt/pull/2733). Thanks @arogge. + +- Removed a redundant buffer resize when formatting to `std::ostream` + (https://github.com/fmtlib/fmt/issues/2842, + https://github.com/fmtlib/fmt/pull/2843). Thanks @jcelerier. + +- Made precision computation for strings consistent with width + (https://github.com/fmtlib/fmt/issues/2888). + +- Fixed handling of locale separators in floating point formatting + (https://github.com/fmtlib/fmt/issues/2830). + +- Made sign specifiers work with `__int128_t` + (https://github.com/fmtlib/fmt/issues/2773). + +- Improved support for systems such as CHERI with extra data stored in + pointers (https://github.com/fmtlib/fmt/pull/2932). + Thanks @davidchisnall. + +- Improved documentation + (https://github.com/fmtlib/fmt/pull/2706, + https://github.com/fmtlib/fmt/pull/2712, + https://github.com/fmtlib/fmt/pull/2789, + https://github.com/fmtlib/fmt/pull/2803, + https://github.com/fmtlib/fmt/pull/2805, + https://github.com/fmtlib/fmt/pull/2815, + https://github.com/fmtlib/fmt/pull/2924). + Thanks @BRevzin, @Pokechu22, @setoye, @rtobar, @rbrugo, @anoonD and + @leha-bot. + +- Improved build configuration + (https://github.com/fmtlib/fmt/pull/2766, + https://github.com/fmtlib/fmt/pull/2772, + https://github.com/fmtlib/fmt/pull/2836, + https://github.com/fmtlib/fmt/pull/2852, + https://github.com/fmtlib/fmt/pull/2907, + https://github.com/fmtlib/fmt/pull/2913, + https://github.com/fmtlib/fmt/pull/2914). + Thanks @kambala-decapitator, @mattiasljungstrom, @kieselnb, @nathannaveen + and @Vertexwahn. + +- Fixed various warnings and compilation issues + (https://github.com/fmtlib/fmt/issues/2408, + https://github.com/fmtlib/fmt/issues/2507, + https://github.com/fmtlib/fmt/issues/2697, + https://github.com/fmtlib/fmt/issues/2715, + https://github.com/fmtlib/fmt/issues/2717, + https://github.com/fmtlib/fmt/pull/2722, + https://github.com/fmtlib/fmt/pull/2724, + https://github.com/fmtlib/fmt/pull/2725, + https://github.com/fmtlib/fmt/issues/2726, + https://github.com/fmtlib/fmt/pull/2728, + https://github.com/fmtlib/fmt/pull/2732, + https://github.com/fmtlib/fmt/issues/2738, + https://github.com/fmtlib/fmt/pull/2742, + https://github.com/fmtlib/fmt/issues/2744, + https://github.com/fmtlib/fmt/issues/2745, + https://github.com/fmtlib/fmt/issues/2746, + https://github.com/fmtlib/fmt/issues/2754, + https://github.com/fmtlib/fmt/pull/2755, + https://github.com/fmtlib/fmt/issues/2757, + https://github.com/fmtlib/fmt/pull/2758, + https://github.com/fmtlib/fmt/issues/2761, + https://github.com/fmtlib/fmt/pull/2762, + https://github.com/fmtlib/fmt/issues/2763, + https://github.com/fmtlib/fmt/pull/2765, + https://github.com/fmtlib/fmt/issues/2769, + https://github.com/fmtlib/fmt/pull/2770, + https://github.com/fmtlib/fmt/issues/2771, + https://github.com/fmtlib/fmt/issues/2777, + https://github.com/fmtlib/fmt/pull/2779, + https://github.com/fmtlib/fmt/pull/2782, + https://github.com/fmtlib/fmt/pull/2783, + https://github.com/fmtlib/fmt/issues/2794, + https://github.com/fmtlib/fmt/issues/2796, + https://github.com/fmtlib/fmt/pull/2797, + https://github.com/fmtlib/fmt/pull/2801, + https://github.com/fmtlib/fmt/pull/2802, + https://github.com/fmtlib/fmt/issues/2808, + https://github.com/fmtlib/fmt/issues/2818, + https://github.com/fmtlib/fmt/pull/2819, + https://github.com/fmtlib/fmt/issues/2829, + https://github.com/fmtlib/fmt/issues/2835, + https://github.com/fmtlib/fmt/issues/2848, + https://github.com/fmtlib/fmt/issues/2860, + https://github.com/fmtlib/fmt/pull/2861, + https://github.com/fmtlib/fmt/pull/2882, + https://github.com/fmtlib/fmt/issues/2886, + https://github.com/fmtlib/fmt/issues/2891, + https://github.com/fmtlib/fmt/pull/2892, + https://github.com/fmtlib/fmt/issues/2895, + https://github.com/fmtlib/fmt/issues/2896, + https://github.com/fmtlib/fmt/pull/2903, + https://github.com/fmtlib/fmt/issues/2906, + https://github.com/fmtlib/fmt/issues/2908, + https://github.com/fmtlib/fmt/pull/2909, + https://github.com/fmtlib/fmt/issues/2920, + https://github.com/fmtlib/fmt/pull/2922, + https://github.com/fmtlib/fmt/pull/2927, + https://github.com/fmtlib/fmt/pull/2929, + https://github.com/fmtlib/fmt/issues/2936, + https://github.com/fmtlib/fmt/pull/2937, + https://github.com/fmtlib/fmt/pull/2938, + https://github.com/fmtlib/fmt/pull/2951, + https://github.com/fmtlib/fmt/issues/2954, + https://github.com/fmtlib/fmt/pull/2957, + https://github.com/fmtlib/fmt/issues/2958, + https://github.com/fmtlib/fmt/pull/2960). + Thanks @matrackif @Tobi823, @ivan-volnov, @VasiliPupkin256, + @federico-busato, @barcharcraz, @jk-jeon, @HazardyKnusperkeks, @dalboris, + @seanm, @gsjaardema, @timsong-cpp, @seanm, @frithrah, @chronoxor, @Agga, + @madmaxoft, @JurajX, @phprus and @Dani-Hub. + +# 8.1.1 - 2022-01-06 + +- Restored ABI compatibility with version 8.0.x + (https://github.com/fmtlib/fmt/issues/2695, + https://github.com/fmtlib/fmt/pull/2696). Thanks @saraedum. +- Fixed chrono formatting on big endian systems + (https://github.com/fmtlib/fmt/issues/2698, + https://github.com/fmtlib/fmt/pull/2699). + Thanks @phprus and @xvitaly. +- Fixed a linkage error with mingw + (https://github.com/fmtlib/fmt/issues/2691, + https://github.com/fmtlib/fmt/pull/2692). Thanks @rbberger. + +# 8.1.0 - 2022-01-02 + +- Optimized chrono formatting + (https://github.com/fmtlib/fmt/pull/2500, + https://github.com/fmtlib/fmt/pull/2537, + https://github.com/fmtlib/fmt/issues/2541, + https://github.com/fmtlib/fmt/pull/2544, + https://github.com/fmtlib/fmt/pull/2550, + https://github.com/fmtlib/fmt/pull/2551, + https://github.com/fmtlib/fmt/pull/2576, + https://github.com/fmtlib/fmt/issues/2577, + https://github.com/fmtlib/fmt/pull/2586, + https://github.com/fmtlib/fmt/pull/2591, + https://github.com/fmtlib/fmt/pull/2594, + https://github.com/fmtlib/fmt/pull/2602, + https://github.com/fmtlib/fmt/pull/2617, + https://github.com/fmtlib/fmt/issues/2628, + https://github.com/fmtlib/fmt/pull/2633, + https://github.com/fmtlib/fmt/issues/2670, + https://github.com/fmtlib/fmt/pull/2671). + + Processing of some specifiers such as `%z` and `%Y` is now up to + 10-20 times faster, for example on GCC 11 with libstdc++: + + ---------------------------------------------------------------------------- + Benchmark Before After + ---------------------------------------------------------------------------- + FMTFormatter_z 261 ns 26.3 ns + FMTFormatterCompile_z 246 ns 11.6 ns + FMTFormatter_Y 263 ns 26.1 ns + FMTFormatterCompile_Y 244 ns 10.5 ns + ---------------------------------------------------------------------------- + + Thanks @phprus and @toughengineer. + +- Implemented subsecond formatting for chrono durations + (https://github.com/fmtlib/fmt/pull/2623). For example + ([godbolt](https://godbolt.org/z/es7vWTETe)): + + ```c++ + #include + + int main() { + fmt::print("{:%S}", std::chrono::milliseconds(1234)); + } + ``` + + prints \"01.234\". + + Thanks @matrackif. + +- Fixed handling of precision 0 when formatting chrono durations + (https://github.com/fmtlib/fmt/issues/2587, + https://github.com/fmtlib/fmt/pull/2588). Thanks @lukester1975. + +- Fixed an overflow on invalid inputs in the `tm` formatter + (https://github.com/fmtlib/fmt/pull/2564). Thanks @phprus. + +- Added `fmt::group_digits` that formats integers with a non-localized + digit separator (comma) for groups of three digits. For example + ([godbolt](https://godbolt.org/z/TxGxG9Poq)): + + ```c++ + #include + + int main() { + fmt::print("{} dollars", fmt::group_digits(1000000)); + } + ``` + + prints \"1,000,000 dollars\". + +- Added support for faint, conceal, reverse and blink text styles + (https://github.com/fmtlib/fmt/pull/2394): + + + + Thanks @benit8 and @data-man. + +- Added experimental support for compile-time floating point + formatting (https://github.com/fmtlib/fmt/pull/2426, + https://github.com/fmtlib/fmt/pull/2470). It is currently + limited to the header-only mode. Thanks @alexezeder. + +- Added UDL-based named argument support to compile-time format string + checks (https://github.com/fmtlib/fmt/issues/2640, + https://github.com/fmtlib/fmt/pull/2649). For example + ([godbolt](https://godbolt.org/z/ohGbbvonv)): + + ```c++ + #include + + int main() { + using namespace fmt::literals; + fmt::print("{answer:s}", "answer"_a=42); + } + ``` + + gives a compile-time error on compilers with C++20 `consteval` and + non-type template parameter support (gcc 10+) because `s` is not a + valid format specifier for an integer. + + Thanks @alexezeder. + +- Implemented escaping of string range elements. For example + ([godbolt](https://godbolt.org/z/rKvM1vKf3)): + + ```c++ + #include + #include + + int main() { + fmt::print("{}", std::vector{"\naan"}); + } + ``` + + is now printed as: + + ["\naan"] + + instead of: + + [" + aan"] + +- Added an experimental `?` specifier for escaping strings. + (https://github.com/fmtlib/fmt/pull/2674). Thanks @BRevzin. + +- Switched to JSON-like representation of maps and sets for + consistency with Python\'s `str.format`. For example + ([godbolt](https://godbolt.org/z/seKjoY9W5)): + + ```c++ + #include + #include + + int main() { + fmt::print("{}", std::map{{"answer", 42}}); + } + ``` + + is now printed as: + + {"answer": 42} + +- Extended `fmt::join` to support C++20-only ranges + (https://github.com/fmtlib/fmt/pull/2549). Thanks @BRevzin. + +- Optimized handling of non-const-iterable ranges and implemented + initial support for non-const-formattable types. + +- Disabled implicit conversions of scoped enums to integers that was + accidentally introduced in earlier versions + (https://github.com/fmtlib/fmt/pull/1841). + +- Deprecated implicit conversion of `[const] signed char*` and + `[const] unsigned char*` to C strings. + +- Deprecated `_format`, a legacy UDL-based format API + (https://github.com/fmtlib/fmt/pull/2646). Thanks @alexezeder. + +- Marked `format`, `formatted_size` and `to_string` as `[[nodiscard]]` + (https://github.com/fmtlib/fmt/pull/2612). @0x8000-0000. + +- Added missing diagnostic when trying to format function and member + pointers as well as objects convertible to pointers which is + explicitly disallowed + (https://github.com/fmtlib/fmt/issues/2598, + https://github.com/fmtlib/fmt/pull/2609, + https://github.com/fmtlib/fmt/pull/2610). Thanks @AlexGuteniev. + +- Optimized writing to a contiguous buffer with `format_to_n` + (https://github.com/fmtlib/fmt/pull/2489). Thanks @Roman-Koshelev. + +- Optimized writing to non-`char` buffers + (https://github.com/fmtlib/fmt/pull/2477). Thanks @Roman-Koshelev. + +- Decimal point is now localized when using the `L` specifier. + +- Improved floating point formatter implementation + (https://github.com/fmtlib/fmt/pull/2498, + https://github.com/fmtlib/fmt/pull/2499). Thanks @Roman-Koshelev. + +- Fixed handling of very large precision in fixed format + (https://github.com/fmtlib/fmt/pull/2616). + +- Made a table of cached powers used in FP formatting static + (https://github.com/fmtlib/fmt/pull/2509). Thanks @jk-jeon. + +- Resolved a lookup ambiguity with C++20 format-related functions due + to ADL (https://github.com/fmtlib/fmt/issues/2639, + https://github.com/fmtlib/fmt/pull/2641). Thanks @mkurdej. + +- Removed unnecessary inline namespace qualification + (https://github.com/fmtlib/fmt/issues/2642, + https://github.com/fmtlib/fmt/pull/2643). Thanks @mkurdej. + +- Implemented argument forwarding in `format_to_n` + (https://github.com/fmtlib/fmt/issues/2462, + https://github.com/fmtlib/fmt/pull/2463). Thanks @owent. + +- Fixed handling of implicit conversions in `fmt::to_string` and + format string compilation + (https://github.com/fmtlib/fmt/issues/2565). + +- Changed the default access mode of files created by + `fmt::output_file` to `-rw-r--r--` for consistency with `fopen` + (https://github.com/fmtlib/fmt/issues/2530). + +- Make `fmt::ostream::flush` public + (https://github.com/fmtlib/fmt/issues/2435). + +- Improved C++14/17 attribute detection + (https://github.com/fmtlib/fmt/pull/2615). Thanks @AlexGuteniev. + +- Improved `consteval` detection for MSVC + (https://github.com/fmtlib/fmt/pull/2559). Thanks @DanielaE. + +- Improved documentation + (https://github.com/fmtlib/fmt/issues/2406, + https://github.com/fmtlib/fmt/pull/2446, + https://github.com/fmtlib/fmt/issues/2493, + https://github.com/fmtlib/fmt/issues/2513, + https://github.com/fmtlib/fmt/pull/2515, + https://github.com/fmtlib/fmt/issues/2522, + https://github.com/fmtlib/fmt/pull/2562, + https://github.com/fmtlib/fmt/pull/2575, + https://github.com/fmtlib/fmt/pull/2606, + https://github.com/fmtlib/fmt/pull/2620, + https://github.com/fmtlib/fmt/issues/2676). + Thanks @sobolevn, @UnePierre, @zhsj, @phprus, @ericcurtin and @Lounarok. + +- Improved fuzzers and added a fuzzer for chrono timepoint formatting + (https://github.com/fmtlib/fmt/pull/2461, + https://github.com/fmtlib/fmt/pull/2469). @pauldreik, + +- Added the `FMT_SYSTEM_HEADERS` CMake option setting which marks + {fmt}\'s headers as system. It can be used to suppress warnings + (https://github.com/fmtlib/fmt/issues/2644, + https://github.com/fmtlib/fmt/pull/2651). Thanks @alexezeder. + +- Added the Bazel build system support + (https://github.com/fmtlib/fmt/pull/2505, + https://github.com/fmtlib/fmt/pull/2516). Thanks @Vertexwahn. + +- Improved build configuration and tests + (https://github.com/fmtlib/fmt/issues/2437, + https://github.com/fmtlib/fmt/pull/2558, + https://github.com/fmtlib/fmt/pull/2648, + https://github.com/fmtlib/fmt/pull/2650, + https://github.com/fmtlib/fmt/pull/2663, + https://github.com/fmtlib/fmt/pull/2677). + Thanks @DanielaE, @alexezeder and @phprus. + +- Fixed various warnings and compilation issues + (https://github.com/fmtlib/fmt/pull/2353, + https://github.com/fmtlib/fmt/pull/2356, + https://github.com/fmtlib/fmt/pull/2399, + https://github.com/fmtlib/fmt/issues/2408, + https://github.com/fmtlib/fmt/pull/2414, + https://github.com/fmtlib/fmt/pull/2427, + https://github.com/fmtlib/fmt/pull/2432, + https://github.com/fmtlib/fmt/pull/2442, + https://github.com/fmtlib/fmt/pull/2434, + https://github.com/fmtlib/fmt/issues/2439, + https://github.com/fmtlib/fmt/pull/2447, + https://github.com/fmtlib/fmt/pull/2450, + https://github.com/fmtlib/fmt/issues/2455, + https://github.com/fmtlib/fmt/issues/2465, + https://github.com/fmtlib/fmt/issues/2472, + https://github.com/fmtlib/fmt/issues/2474, + https://github.com/fmtlib/fmt/pull/2476, + https://github.com/fmtlib/fmt/issues/2478, + https://github.com/fmtlib/fmt/issues/2479, + https://github.com/fmtlib/fmt/issues/2481, + https://github.com/fmtlib/fmt/pull/2482, + https://github.com/fmtlib/fmt/pull/2483, + https://github.com/fmtlib/fmt/issues/2490, + https://github.com/fmtlib/fmt/pull/2491, + https://github.com/fmtlib/fmt/pull/2510, + https://github.com/fmtlib/fmt/pull/2518, + https://github.com/fmtlib/fmt/issues/2528, + https://github.com/fmtlib/fmt/pull/2529, + https://github.com/fmtlib/fmt/pull/2539, + https://github.com/fmtlib/fmt/issues/2540, + https://github.com/fmtlib/fmt/pull/2545, + https://github.com/fmtlib/fmt/pull/2555, + https://github.com/fmtlib/fmt/issues/2557, + https://github.com/fmtlib/fmt/issues/2570, + https://github.com/fmtlib/fmt/pull/2573, + https://github.com/fmtlib/fmt/pull/2582, + https://github.com/fmtlib/fmt/issues/2605, + https://github.com/fmtlib/fmt/pull/2611, + https://github.com/fmtlib/fmt/pull/2647, + https://github.com/fmtlib/fmt/issues/2627, + https://github.com/fmtlib/fmt/pull/2630, + https://github.com/fmtlib/fmt/issues/2635, + https://github.com/fmtlib/fmt/issues/2638, + https://github.com/fmtlib/fmt/issues/2653, + https://github.com/fmtlib/fmt/issues/2654, + https://github.com/fmtlib/fmt/issues/2661, + https://github.com/fmtlib/fmt/pull/2664, + https://github.com/fmtlib/fmt/pull/2684). + Thanks @DanielaE, @mwinterb, @cdacamar, @TrebledJ, @bodomartin, @cquammen, + @white238, @mmarkeloff, @palacaze, @jcelerier, @mborn-adi, @BrukerJWD, + @spyridon97, @phprus, @oliverlee, @joshessman-llnl, @akohlmey, @timkalu, + @olupton, @Acretock, @alexezeder, @andrewcorrigan, @lucpelletier and + @HazardyKnusperkeks. + +# 8.0.1 - 2021-07-02 + +- Fixed the version number in the inline namespace + (https://github.com/fmtlib/fmt/issues/2374). +- Added a missing presentation type check for `std::string` + (https://github.com/fmtlib/fmt/issues/2402). +- Fixed a linkage error when mixing code built with clang and gcc + (https://github.com/fmtlib/fmt/issues/2377). +- Fixed documentation issues + (https://github.com/fmtlib/fmt/pull/2396, + https://github.com/fmtlib/fmt/issues/2403, + https://github.com/fmtlib/fmt/issues/2406). Thanks @mkurdej. +- Removed dead code in FP formatter ( + https://github.com/fmtlib/fmt/pull/2398). Thanks @javierhonduco. +- Fixed various warnings and compilation issues + (https://github.com/fmtlib/fmt/issues/2351, + https://github.com/fmtlib/fmt/issues/2359, + https://github.com/fmtlib/fmt/pull/2365, + https://github.com/fmtlib/fmt/issues/2368, + https://github.com/fmtlib/fmt/pull/2370, + https://github.com/fmtlib/fmt/pull/2376, + https://github.com/fmtlib/fmt/pull/2381, + https://github.com/fmtlib/fmt/pull/2382, + https://github.com/fmtlib/fmt/issues/2386, + https://github.com/fmtlib/fmt/pull/2389, + https://github.com/fmtlib/fmt/pull/2395, + https://github.com/fmtlib/fmt/pull/2397, + https://github.com/fmtlib/fmt/issues/2400, + https://github.com/fmtlib/fmt/issues/2401, + https://github.com/fmtlib/fmt/pull/2407). + Thanks @zx2c4, @AidanSun05, @mattiasljungstrom, @joemmett, @erengy, + @patlkli, @gsjaardema and @phprus. + +# 8.0.0 - 2021-06-21 + +- Enabled compile-time format string checks by default. For example + ([godbolt](https://godbolt.org/z/sMxcohGjz)): + + ```c++ + #include + + int main() { + fmt::print("{:d}", "I am not a number"); + } + ``` + + gives a compile-time error on compilers with C++20 `consteval` + support (gcc 10+, clang 11+) because `d` is not a valid format + specifier for a string. + + To pass a runtime string wrap it in `fmt::runtime`: + + ```c++ + fmt::print(fmt::runtime("{:d}"), "I am not a number"); + ``` + +- Added compile-time formatting + (https://github.com/fmtlib/fmt/pull/2019, + https://github.com/fmtlib/fmt/pull/2044, + https://github.com/fmtlib/fmt/pull/2056, + https://github.com/fmtlib/fmt/pull/2072, + https://github.com/fmtlib/fmt/pull/2075, + https://github.com/fmtlib/fmt/issues/2078, + https://github.com/fmtlib/fmt/pull/2129, + https://github.com/fmtlib/fmt/pull/2326). For example + ([godbolt](https://godbolt.org/z/Mxx9d89jM)): + + ```c++ + #include + + consteval auto compile_time_itoa(int value) -> std::array { + auto result = std::array(); + fmt::format_to(result.data(), FMT_COMPILE("{}"), value); + return result; + } + + constexpr auto answer = compile_time_itoa(42); + ``` + + Most of the formatting functionality is available at compile time + with a notable exception of floating-point numbers and pointers. + Thanks @alexezeder. + +- Optimized handling of format specifiers during format string + compilation. For example, hexadecimal formatting (`"{:x}"`) is now + 3-7x faster than before when using `format_to` with format string + compilation and a stack-allocated buffer + (https://github.com/fmtlib/fmt/issues/1944). + + Before (7.1.3): + + ---------------------------------------------------------------------------- + Benchmark Time CPU Iterations + ---------------------------------------------------------------------------- + FMTCompileOld/0 15.5 ns 15.5 ns 43302898 + FMTCompileOld/42 16.6 ns 16.6 ns 43278267 + FMTCompileOld/273123 18.7 ns 18.6 ns 37035861 + FMTCompileOld/9223372036854775807 19.4 ns 19.4 ns 35243000 + ---------------------------------------------------------------------------- + + After (8.x): + + ---------------------------------------------------------------------------- + Benchmark Time CPU Iterations + ---------------------------------------------------------------------------- + FMTCompileNew/0 1.99 ns 1.99 ns 360523686 + FMTCompileNew/42 2.33 ns 2.33 ns 279865664 + FMTCompileNew/273123 3.72 ns 3.71 ns 190230315 + FMTCompileNew/9223372036854775807 5.28 ns 5.26 ns 130711631 + ---------------------------------------------------------------------------- + + It is even faster than `std::to_chars` from libc++ compiled with + clang on macOS: + + ---------------------------------------------------------------------------- + Benchmark Time CPU Iterations + ---------------------------------------------------------------------------- + ToChars/0 4.42 ns 4.41 ns 160196630 + ToChars/42 5.00 ns 4.98 ns 140735201 + ToChars/273123 7.26 ns 7.24 ns 95784130 + ToChars/9223372036854775807 8.77 ns 8.75 ns 75872534 + ---------------------------------------------------------------------------- + + In other cases, especially involving `std::string` construction, the + speed up is usually lower because handling format specifiers takes a + smaller fraction of the total time. + +- Added the `_cf` user-defined literal to represent a compiled format + string. It can be used instead of the `FMT_COMPILE` macro + (https://github.com/fmtlib/fmt/pull/2043, + https://github.com/fmtlib/fmt/pull/2242): + + ```c++ + #include + + using namespace fmt::literals; + auto s = fmt::format(FMT_COMPILE("{}"), 42); // 🙁 not modern + auto s = fmt::format("{}"_cf, 42); // 🙂 modern as hell + ``` + + It requires compiler support for class types in non-type template + parameters (a C++20 feature) which is available in GCC 9.3+. + Thanks @alexezeder. + +- Format string compilation now requires `format` functions of + `formatter` specializations for user-defined types to be `const`: + + ```c++ + template <> struct fmt::formatter: formatter { + template + auto format(my_type obj, FormatContext& ctx) const { // Note const here. + // ... + } + }; + ``` + +- Added UDL-based named argument support to format string compilation + (https://github.com/fmtlib/fmt/pull/2243, + https://github.com/fmtlib/fmt/pull/2281). For example: + + ```c++ + #include + + using namespace fmt::literals; + auto s = fmt::format(FMT_COMPILE("{answer}"), "answer"_a = 42); + ``` + + Here the argument named \"answer\" is resolved at compile time with + no runtime overhead. Thanks @alexezeder. + +- Added format string compilation support to `fmt::print` + (https://github.com/fmtlib/fmt/issues/2280, + https://github.com/fmtlib/fmt/pull/2304). Thanks @alexezeder. + +- Added initial support for compiling {fmt} as a C++20 module + (https://github.com/fmtlib/fmt/pull/2235, + https://github.com/fmtlib/fmt/pull/2240, + https://github.com/fmtlib/fmt/pull/2260, + https://github.com/fmtlib/fmt/pull/2282, + https://github.com/fmtlib/fmt/pull/2283, + https://github.com/fmtlib/fmt/pull/2288, + https://github.com/fmtlib/fmt/pull/2298, + https://github.com/fmtlib/fmt/pull/2306, + https://github.com/fmtlib/fmt/pull/2307, + https://github.com/fmtlib/fmt/pull/2309, + https://github.com/fmtlib/fmt/pull/2318, + https://github.com/fmtlib/fmt/pull/2324, + https://github.com/fmtlib/fmt/pull/2332, + https://github.com/fmtlib/fmt/pull/2340). Thanks @DanielaE. + +- Made symbols private by default reducing shared library size + (https://github.com/fmtlib/fmt/pull/2301). For example + there was a \~15% reported reduction on one platform. Thanks @sergiud. + +- Optimized includes making the result of preprocessing `fmt/format.h` + \~20% smaller with libstdc++/C++20 and slightly improving build + times (https://github.com/fmtlib/fmt/issues/1998). + +- Added support of ranges with non-const `begin` / `end` + (https://github.com/fmtlib/fmt/pull/1953). Thanks @kitegi. + +- Added support of `std::byte` and other formattable types to + `fmt::join` (https://github.com/fmtlib/fmt/issues/1981, + https://github.com/fmtlib/fmt/issues/2040, + https://github.com/fmtlib/fmt/pull/2050, + https://github.com/fmtlib/fmt/issues/2262). For example: + + ```c++ + #include + #include + #include + + int main() { + auto bytes = std::vector{std::byte(4), std::byte(2)}; + fmt::print("{}", fmt::join(bytes, "")); + } + ``` + + prints \"42\". + + Thanks @kamibo. + +- Implemented the default format for `std::chrono::system_clock` + (https://github.com/fmtlib/fmt/issues/2319, + https://github.com/fmtlib/fmt/pull/2345). For example: + + ```c++ + #include + + int main() { + fmt::print("{}", std::chrono::system_clock::now()); + } + ``` + + prints \"2021-06-18 15:22:00\" (the output depends on the current + date and time). Thanks @sunmy2019. + +- Made more chrono specifiers locale independent by default. Use the + `'L'` specifier to get localized formatting. For example: + + ```c++ + #include + + int main() { + std::locale::global(std::locale("ru_RU.UTF-8")); + auto monday = std::chrono::weekday(1); + fmt::print("{}\n", monday); // prints "Mon" + fmt::print("{:L}\n", monday); // prints "пн" + } + ``` + +- Improved locale handling in chrono formatting + (https://github.com/fmtlib/fmt/issues/2337, + https://github.com/fmtlib/fmt/pull/2349, + https://github.com/fmtlib/fmt/pull/2350). Thanks @phprus. + +- Deprecated `fmt/locale.h` moving the formatting functions that take + a locale to `fmt/format.h` (`char`) and `fmt/xchar` (other + overloads). This doesn\'t introduce a dependency on `` so + there is virtually no compile time effect. + +- Deprecated an undocumented `format_to` overload that takes + `basic_memory_buffer`. + +- Made parameter order in `vformat_to` consistent with `format_to` + (https://github.com/fmtlib/fmt/issues/2327). + +- Added support for time points with arbitrary durations + (https://github.com/fmtlib/fmt/issues/2208). For example: + + ```c++ + #include + + int main() { + using tp = std::chrono::time_point< + std::chrono::system_clock, std::chrono::seconds>; + fmt::print("{:%S}", tp(std::chrono::seconds(42))); + } + ``` + + prints \"42\". + +- Formatting floating-point numbers no longer produces trailing zeros + by default for consistency with `std::format`. For example: + + ```c++ + #include + + int main() { + fmt::print("{0:.3}", 1.1); + } + ``` + + prints \"1.1\". Use the `'#'` specifier to keep trailing zeros. + +- Dropped a limit on the number of elements in a range and replaced + `{}` with `[]` as range delimiters for consistency with Python\'s + `str.format`. + +- The `'L'` specifier for locale-specific numeric formatting can now + be combined with presentation specifiers as in `std::format`. For + example: + + ```c++ + #include + #include + + int main() { + std::locale::global(std::locale("fr_FR.UTF-8")); + fmt::print("{0:.2Lf}", 0.42); + } + ``` + + prints \"0,42\". The deprecated `'n'` specifier has been removed. + +- Made the `0` specifier ignored for infinity and NaN + (https://github.com/fmtlib/fmt/issues/2305, + https://github.com/fmtlib/fmt/pull/2310). Thanks @Liedtke. + +- Made the hexfloat formatting use the right alignment by default + (https://github.com/fmtlib/fmt/issues/2308, + https://github.com/fmtlib/fmt/pull/2317). Thanks @Liedtke. + +- Removed the deprecated numeric alignment (`'='`). Use the `'0'` + specifier instead. + +- Removed the deprecated `fmt/posix.h` header that has been replaced + with `fmt/os.h`. + +- Removed the deprecated `format_to_n_context`, `format_to_n_args` and + `make_format_to_n_args`. They have been replaced with + `format_context`, `` format_args` and ``make_format_args\`\` + respectively. + +- Moved `wchar_t`-specific functions and types to `fmt/xchar.h`. You + can define `FMT_DEPRECATED_INCLUDE_XCHAR` to automatically include + `fmt/xchar.h` from `fmt/format.h` but this will be disabled in the + next major release. + +- Fixed handling of the `'+'` specifier in localized formatting + (https://github.com/fmtlib/fmt/issues/2133). + +- Added support for the `'s'` format specifier that gives textual + representation of `bool` + (https://github.com/fmtlib/fmt/issues/2094, + https://github.com/fmtlib/fmt/pull/2109). For example: + + ```c++ + #include + + int main() { + fmt::print("{:s}", true); + } + ``` + + prints \"true\". Thanks @powercoderlol. + +- Made `fmt::ptr` work with function pointers + (https://github.com/fmtlib/fmt/pull/2131). For example: + + ```c++ + #include + + int main() { + fmt::print("My main: {}\n", fmt::ptr(main)); + } + ``` + + Thanks @mikecrowe. + +- The undocumented support for specializing `formatter` for pointer + types has been removed. + +- Fixed `fmt::formatted_size` with format string compilation + (https://github.com/fmtlib/fmt/pull/2141, + https://github.com/fmtlib/fmt/pull/2161). Thanks @alexezeder. + +- Fixed handling of empty format strings during format string + compilation (https://github.com/fmtlib/fmt/issues/2042): + + ```c++ + auto s = fmt::format(FMT_COMPILE("")); + ``` + + Thanks @alexezeder. + +- Fixed handling of enums in `fmt::to_string` + (https://github.com/fmtlib/fmt/issues/2036). + +- Improved width computation + (https://github.com/fmtlib/fmt/issues/2033, + https://github.com/fmtlib/fmt/issues/2091). For example: + + ```c++ + #include + + int main() { + fmt::print("{:-<10}{}\n", "你好", "世界"); + fmt::print("{:-<10}{}\n", "hello", "world"); + } + ``` + + prints + + ![](https://user-images.githubusercontent.com/576385/119840373-cea3ca80-beb9-11eb-91e0-54266c48e181.png) + + on a modern terminal. + +- The experimental fast output stream (`fmt::ostream`) is now + truncated by default for consistency with `fopen` + (https://github.com/fmtlib/fmt/issues/2018). For example: + + ```c++ + #include + + int main() { + fmt::ostream out1 = fmt::output_file("guide"); + out1.print("Zaphod"); + out1.close(); + fmt::ostream out2 = fmt::output_file("guide"); + out2.print("Ford"); + } + ``` + + writes \"Ford\" to the file \"guide\". To preserve the old file + content if any pass `fmt::file::WRONLY | fmt::file::CREATE` flags to + `fmt::output_file`. + +- Fixed moving of `fmt::ostream` that holds buffered data + (https://github.com/fmtlib/fmt/issues/2197, + https://github.com/fmtlib/fmt/pull/2198). Thanks @vtta. + +- Replaced the `fmt::system_error` exception with a function of the + same name that constructs `std::system_error` + (https://github.com/fmtlib/fmt/issues/2266). + +- Replaced the `fmt::windows_error` exception with a function of the + same name that constructs `std::system_error` with the category + returned by `fmt::system_category()` + (https://github.com/fmtlib/fmt/issues/2274, + https://github.com/fmtlib/fmt/pull/2275). The latter is + similar to `std::sytem_category` but correctly handles UTF-8. + Thanks @phprus. + +- Replaced `fmt::error_code` with `std::error_code` and made it + formattable (https://github.com/fmtlib/fmt/issues/2269, + https://github.com/fmtlib/fmt/pull/2270, + https://github.com/fmtlib/fmt/pull/2273). Thanks @phprus. + +- Added speech synthesis support + (https://github.com/fmtlib/fmt/pull/2206). + +- Made `format_to` work with a memory buffer that has a custom + allocator (https://github.com/fmtlib/fmt/pull/2300). + Thanks @voxmea. + +- Added `Allocator::max_size` support to `basic_memory_buffer`. + (https://github.com/fmtlib/fmt/pull/1960). Thanks @phprus. + +- Added wide string support to `fmt::join` + (https://github.com/fmtlib/fmt/pull/2236). Thanks @crbrz. + +- Made iterators passed to `formatter` specializations via a format + context satisfy C++20 `std::output_iterator` requirements + (https://github.com/fmtlib/fmt/issues/2156, + https://github.com/fmtlib/fmt/pull/2158, + https://github.com/fmtlib/fmt/issues/2195, + https://github.com/fmtlib/fmt/pull/2204). Thanks @randomnetcat. + +- Optimized the `printf` implementation + (https://github.com/fmtlib/fmt/pull/1982, + https://github.com/fmtlib/fmt/pull/1984, + https://github.com/fmtlib/fmt/pull/2016, + https://github.com/fmtlib/fmt/pull/2164). + Thanks @rimathia and @moiwi. + +- Improved detection of `constexpr` `char_traits` + (https://github.com/fmtlib/fmt/pull/2246, + https://github.com/fmtlib/fmt/pull/2257). Thanks @phprus. + +- Fixed writing to `stdout` when it is redirected to `NUL` on Windows + (https://github.com/fmtlib/fmt/issues/2080). + +- Fixed exception propagation from iterators + (https://github.com/fmtlib/fmt/issues/2097). + +- Improved `strftime` error handling + (https://github.com/fmtlib/fmt/issues/2238, + https://github.com/fmtlib/fmt/pull/2244). Thanks @yumeyao. + +- Stopped using deprecated GCC UDL template extension. + +- Added `fmt/args.h` to the install target + (https://github.com/fmtlib/fmt/issues/2096). + +- Error messages are now passed to assert when exceptions are disabled + (https://github.com/fmtlib/fmt/pull/2145). Thanks @NobodyXu. + +- Added the `FMT_MASTER_PROJECT` CMake option to control build and + install targets when {fmt} is included via `add_subdirectory` + (https://github.com/fmtlib/fmt/issues/2098, + https://github.com/fmtlib/fmt/pull/2100). + Thanks @randomizedthinking. + +- Improved build configuration + (https://github.com/fmtlib/fmt/pull/2026, + https://github.com/fmtlib/fmt/pull/2122). + Thanks @luncliff and @ibaned. + +- Fixed various warnings and compilation issues + (https://github.com/fmtlib/fmt/issues/1947, + https://github.com/fmtlib/fmt/pull/1959, + https://github.com/fmtlib/fmt/pull/1963, + https://github.com/fmtlib/fmt/pull/1965, + https://github.com/fmtlib/fmt/issues/1966, + https://github.com/fmtlib/fmt/pull/1974, + https://github.com/fmtlib/fmt/pull/1975, + https://github.com/fmtlib/fmt/pull/1990, + https://github.com/fmtlib/fmt/issues/2000, + https://github.com/fmtlib/fmt/pull/2001, + https://github.com/fmtlib/fmt/issues/2002, + https://github.com/fmtlib/fmt/issues/2004, + https://github.com/fmtlib/fmt/pull/2006, + https://github.com/fmtlib/fmt/pull/2009, + https://github.com/fmtlib/fmt/pull/2010, + https://github.com/fmtlib/fmt/issues/2038, + https://github.com/fmtlib/fmt/issues/2039, + https://github.com/fmtlib/fmt/issues/2047, + https://github.com/fmtlib/fmt/pull/2053, + https://github.com/fmtlib/fmt/issues/2059, + https://github.com/fmtlib/fmt/pull/2065, + https://github.com/fmtlib/fmt/pull/2067, + https://github.com/fmtlib/fmt/pull/2068, + https://github.com/fmtlib/fmt/pull/2073, + https://github.com/fmtlib/fmt/issues/2103, + https://github.com/fmtlib/fmt/issues/2105, + https://github.com/fmtlib/fmt/pull/2106, + https://github.com/fmtlib/fmt/pull/2107, + https://github.com/fmtlib/fmt/issues/2116, + https://github.com/fmtlib/fmt/pull/2117, + https://github.com/fmtlib/fmt/issues/2118, + https://github.com/fmtlib/fmt/pull/2119, + https://github.com/fmtlib/fmt/issues/2127, + https://github.com/fmtlib/fmt/pull/2128, + https://github.com/fmtlib/fmt/issues/2140, + https://github.com/fmtlib/fmt/issues/2142, + https://github.com/fmtlib/fmt/pull/2143, + https://github.com/fmtlib/fmt/pull/2144, + https://github.com/fmtlib/fmt/issues/2147, + https://github.com/fmtlib/fmt/issues/2148, + https://github.com/fmtlib/fmt/issues/2149, + https://github.com/fmtlib/fmt/pull/2152, + https://github.com/fmtlib/fmt/pull/2160, + https://github.com/fmtlib/fmt/issues/2170, + https://github.com/fmtlib/fmt/issues/2175, + https://github.com/fmtlib/fmt/issues/2176, + https://github.com/fmtlib/fmt/pull/2177, + https://github.com/fmtlib/fmt/issues/2178, + https://github.com/fmtlib/fmt/pull/2179, + https://github.com/fmtlib/fmt/issues/2180, + https://github.com/fmtlib/fmt/issues/2181, + https://github.com/fmtlib/fmt/pull/2183, + https://github.com/fmtlib/fmt/issues/2184, + https://github.com/fmtlib/fmt/issues/2185, + https://github.com/fmtlib/fmt/pull/2186, + https://github.com/fmtlib/fmt/pull/2187, + https://github.com/fmtlib/fmt/pull/2190, + https://github.com/fmtlib/fmt/pull/2192, + https://github.com/fmtlib/fmt/pull/2194, + https://github.com/fmtlib/fmt/pull/2205, + https://github.com/fmtlib/fmt/issues/2210, + https://github.com/fmtlib/fmt/pull/2211, + https://github.com/fmtlib/fmt/pull/2215, + https://github.com/fmtlib/fmt/pull/2216, + https://github.com/fmtlib/fmt/pull/2218, + https://github.com/fmtlib/fmt/pull/2220, + https://github.com/fmtlib/fmt/issues/2228, + https://github.com/fmtlib/fmt/pull/2229, + https://github.com/fmtlib/fmt/pull/2230, + https://github.com/fmtlib/fmt/issues/2233, + https://github.com/fmtlib/fmt/pull/2239, + https://github.com/fmtlib/fmt/issues/2248, + https://github.com/fmtlib/fmt/issues/2252, + https://github.com/fmtlib/fmt/pull/2253, + https://github.com/fmtlib/fmt/pull/2255, + https://github.com/fmtlib/fmt/issues/2261, + https://github.com/fmtlib/fmt/issues/2278, + https://github.com/fmtlib/fmt/issues/2284, + https://github.com/fmtlib/fmt/pull/2287, + https://github.com/fmtlib/fmt/pull/2289, + https://github.com/fmtlib/fmt/pull/2290, + https://github.com/fmtlib/fmt/pull/2293, + https://github.com/fmtlib/fmt/issues/2295, + https://github.com/fmtlib/fmt/pull/2296, + https://github.com/fmtlib/fmt/pull/2297, + https://github.com/fmtlib/fmt/issues/2311, + https://github.com/fmtlib/fmt/pull/2313, + https://github.com/fmtlib/fmt/pull/2315, + https://github.com/fmtlib/fmt/issues/2320, + https://github.com/fmtlib/fmt/pull/2321, + https://github.com/fmtlib/fmt/pull/2323, + https://github.com/fmtlib/fmt/issues/2328, + https://github.com/fmtlib/fmt/pull/2329, + https://github.com/fmtlib/fmt/pull/2333, + https://github.com/fmtlib/fmt/pull/2338, + https://github.com/fmtlib/fmt/pull/2341). + Thanks @darklukee, @fagg, @killerbot242, @jgopel, @yeswalrus, @Finkman, + @HazardyKnusperkeks, @dkavolis, @concatime, @chronoxor, @summivox, @yNeo, + @Apache-HB, @alexezeder, @toojays, @Brainy0207, @vadz, @imsherlock, @phprus, + @white238, @yafshar, @BillyDonahue, @jstaahl, @denchat, @DanielaE, + @ilyakurdyukov, @ilmai, @JessyDL, @sergiud, @mwinterb, @sven-herrmann, + @jmelas, @twoixter, @crbrz and @upsj. + +- Improved documentation + (https://github.com/fmtlib/fmt/issues/1986, + https://github.com/fmtlib/fmt/pull/2051, + https://github.com/fmtlib/fmt/issues/2057, + https://github.com/fmtlib/fmt/pull/2081, + https://github.com/fmtlib/fmt/issues/2084, + https://github.com/fmtlib/fmt/pull/2312). + Thanks @imba-tjd, @0x416c69 and @mordante. + +- Continuous integration and test improvements + (https://github.com/fmtlib/fmt/issues/1969, + https://github.com/fmtlib/fmt/pull/1991, + https://github.com/fmtlib/fmt/pull/2020, + https://github.com/fmtlib/fmt/pull/2110, + https://github.com/fmtlib/fmt/pull/2114, + https://github.com/fmtlib/fmt/issues/2196, + https://github.com/fmtlib/fmt/pull/2217, + https://github.com/fmtlib/fmt/pull/2247, + https://github.com/fmtlib/fmt/pull/2256, + https://github.com/fmtlib/fmt/pull/2336, + https://github.com/fmtlib/fmt/pull/2346). + Thanks @jgopel, @alexezeder and @DanielaE. + +# 7.1.3 - 2020-11-24 + +- Fixed handling of buffer boundaries in `format_to_n` + (https://github.com/fmtlib/fmt/issues/1996, + https://github.com/fmtlib/fmt/issues/2029). +- Fixed linkage errors when linking with a shared library + (https://github.com/fmtlib/fmt/issues/2011). +- Reintroduced ostream support to range formatters + (https://github.com/fmtlib/fmt/issues/2014). +- Worked around an issue with mixing std versions in gcc + (https://github.com/fmtlib/fmt/issues/2017). + +# 7.1.2 - 2020-11-04 + +- Fixed floating point formatting with large precision + (https://github.com/fmtlib/fmt/issues/1976). + +# 7.1.1 - 2020-11-01 + +- Fixed ABI compatibility with 7.0.x + (https://github.com/fmtlib/fmt/issues/1961). +- Added the `FMT_ARM_ABI_COMPATIBILITY` macro to work around ABI + incompatibility between GCC and Clang on ARM + (https://github.com/fmtlib/fmt/issues/1919). +- Worked around a SFINAE bug in GCC 8 + (https://github.com/fmtlib/fmt/issues/1957). +- Fixed linkage errors when building with GCC\'s LTO + (https://github.com/fmtlib/fmt/issues/1955). +- Fixed a compilation error when building without `__builtin_clz` or + equivalent (https://github.com/fmtlib/fmt/pull/1968). + Thanks @tohammer. +- Fixed a sign conversion warning + (https://github.com/fmtlib/fmt/pull/1964). Thanks @OptoCloud. + +# 7.1.0 - 2020-10-25 + +- Switched from + [Grisu3](https://www.cs.tufts.edu/~nr/cs257/archive/florian-loitsch/printf.pdf) + to [Dragonbox](https://github.com/jk-jeon/dragonbox) for the default + floating-point formatting which gives the shortest decimal + representation with round-trip guarantee and correct rounding + (https://github.com/fmtlib/fmt/pull/1882, + https://github.com/fmtlib/fmt/pull/1887, + https://github.com/fmtlib/fmt/pull/1894). This makes {fmt} + up to 20-30x faster than common implementations of + `std::ostringstream` and `sprintf` on + [dtoa-benchmark](https://github.com/fmtlib/dtoa-benchmark) and + faster than double-conversion and Ryū: + + ![](https://user-images.githubusercontent.com/576385/95684665-11719600-0ba8-11eb-8e5b-972ff4e49428.png) + + It is possible to get even better performance at the cost of larger + binary size by compiling with the `FMT_USE_FULL_CACHE_DRAGONBOX` + macro set to 1. + + Thanks @jk-jeon. + +- Added an experimental unsynchronized file output API which, together + with [format string + compilation](https://fmt.dev/latest/api.html#compile-api), can give + [5-9 times speed up compared to + fprintf](https://www.zverovich.net/2020/08/04/optimal-file-buffer-size.html) + on common platforms ([godbolt](https://godbolt.org/z/nsTcG8)): + + ```c++ + #include + + int main() { + auto f = fmt::output_file("guide"); + f.print("The answer is {}.", 42); + } + ``` + +- Added a formatter for `std::chrono::time_point` + (https://github.com/fmtlib/fmt/issues/1819, + https://github.com/fmtlib/fmt/pull/1837). For example + ([godbolt](https://godbolt.org/z/c4M6fh)): + + ```c++ + #include + + int main() { + auto now = std::chrono::system_clock::now(); + fmt::print("The time is {:%H:%M:%S}.\n", now); + } + ``` + + Thanks @adamburgess. + +- Added support for ranges with non-const `begin`/`end` to `fmt::join` + (https://github.com/fmtlib/fmt/issues/1784, + https://github.com/fmtlib/fmt/pull/1786). For example + ([godbolt](https://godbolt.org/z/jP63Tv)): + + ```c++ + #include + #include + + int main() { + using std::literals::string_literals::operator""s; + auto strs = std::array{"a"s, "bb"s, "ccc"s}; + auto range = strs | ranges::views::filter( + [] (const std::string &x) { return x.size() != 2; } + ); + fmt::print("{}\n", fmt::join(range, "")); + } + ``` + + prints \"accc\". + + Thanks @tonyelewis. + +- Added a `memory_buffer::append` overload that takes a range + (https://github.com/fmtlib/fmt/pull/1806). Thanks @BRevzin. + +- Improved handling of single code units in `FMT_COMPILE`. For + example: + + ```c++ + #include + + char* f(char* buf) { + return fmt::format_to(buf, FMT_COMPILE("x{}"), 42); + } + ``` + + compiles to just ([godbolt](https://godbolt.org/z/5vncz3)): + + ```asm + _Z1fPc: + movb $120, (%rdi) + xorl %edx, %edx + cmpl $42, _ZN3fmt2v76detail10basic_dataIvE23zero_or_powers_of_10_32E+8(%rip) + movl $3, %eax + seta %dl + subl %edx, %eax + movzwl _ZN3fmt2v76detail10basic_dataIvE6digitsE+84(%rip), %edx + cltq + addq %rdi, %rax + movw %dx, -2(%rax) + ret + ``` + + Here a single `mov` instruction writes `'x'` (`$120`) to the output + buffer. + +- Added dynamic width support to format string compilation + (https://github.com/fmtlib/fmt/issues/1809). + +- Improved error reporting for unformattable types: now you\'ll get + the type name directly in the error message instead of the note: + + ```c++ + #include + + struct how_about_no {}; + + int main() { + fmt::print("{}", how_about_no()); + } + ``` + + Error ([godbolt](https://godbolt.org/z/GoxM4e)): + + `fmt/core.h:1438:3: error: static_assert failed due to requirement 'fmt::v7::formattable()' "Cannot format an argument. To make type T formattable provide a formatter specialization: https://fmt.dev/latest/api.html#udt" ...` + +- Added the + [make_args_checked](https://fmt.dev/7.1.0/api.html#argument-lists) + function template that allows you to write formatting functions with + compile-time format string checks and avoid binary code bloat + ([godbolt](https://godbolt.org/z/PEf9qr)): + + ```c++ + void vlog(const char* file, int line, fmt::string_view format, + fmt::format_args args) { + fmt::print("{}: {}: ", file, line); + fmt::vprint(format, args); + } + + template + void log(const char* file, int line, const S& format, Args&&... args) { + vlog(file, line, format, + fmt::make_args_checked(format, args...)); + } + + #define MY_LOG(format, ...) \ + log(__FILE__, __LINE__, FMT_STRING(format), __VA_ARGS__) + + MY_LOG("invalid squishiness: {}", 42); + ``` + +- Replaced `snprintf` fallback with a faster internal IEEE 754 `float` + and `double` formatter for arbitrary precision. For example + ([godbolt](https://godbolt.org/z/dPhWvj)): + + ```c++ + #include + + int main() { + fmt::print("{:.500}\n", 4.9406564584124654E-324); + } + ``` + + prints + + `4.9406564584124654417656879286822137236505980261432476442558568250067550727020875186529983636163599237979656469544571773092665671035593979639877479601078187812630071319031140452784581716784898210368871863605699873072305000638740915356498438731247339727316961514003171538539807412623856559117102665855668676818703956031062493194527159149245532930545654440112748012970999954193198940908041656332452475714786901472678015935523861155013480352649347201937902681071074917033322268447533357208324319360923829e-324`. + +- Made `format_to_n` and `formatted_size` part of the [core + API](https://fmt.dev/latest/api.html#core-api) + ([godbolt](https://godbolt.org/z/sPjY1K)): + + ```c++ + #include + + int main() { + char buffer[10]; + auto result = fmt::format_to_n(buffer, sizeof(buffer), "{}", 42); + } + ``` + +- Added `fmt::format_to_n` overload with format string compilation + (https://github.com/fmtlib/fmt/issues/1764, + https://github.com/fmtlib/fmt/pull/1767, + https://github.com/fmtlib/fmt/pull/1869). For example + ([godbolt](https://godbolt.org/z/93h86q)): + + ```c++ + #include + + int main() { + char buffer[8]; + fmt::format_to_n(buffer, sizeof(buffer), FMT_COMPILE("{}"), 42); + } + ``` + + Thanks @Kurkin and @alexezeder. + +- Added `fmt::format_to` overload that take `text_style` + (https://github.com/fmtlib/fmt/issues/1593, + https://github.com/fmtlib/fmt/issues/1842, + https://github.com/fmtlib/fmt/pull/1843). For example + ([godbolt](https://godbolt.org/z/91153r)): + + ```c++ + #include + + int main() { + std::string out; + fmt::format_to(std::back_inserter(out), + fmt::emphasis::bold | fg(fmt::color::red), + "The answer is {}.", 42); + } + ``` + + Thanks @Naios. + +- Made the `'#'` specifier emit trailing zeros in addition to the + decimal point (https://github.com/fmtlib/fmt/issues/1797). + For example ([godbolt](https://godbolt.org/z/bhdcW9)): + + ```c++ + #include + + int main() { + fmt::print("{:#.2g}", 0.5); + } + ``` + + prints `0.50`. + +- Changed the default floating point format to not include `.0` for + consistency with `std::format` and `std::to_chars` + (https://github.com/fmtlib/fmt/issues/1893, + https://github.com/fmtlib/fmt/issues/1943). It is possible + to get the decimal point and trailing zero with the `#` specifier. + +- Fixed an issue with floating-point formatting that could result in + addition of a non-significant trailing zero in rare cases e.g. + `1.00e-34` instead of `1.0e-34` + (https://github.com/fmtlib/fmt/issues/1873, + https://github.com/fmtlib/fmt/issues/1917). + +- Made `fmt::to_string` fallback on `ostream` insertion operator if + the `formatter` specialization is not provided + (https://github.com/fmtlib/fmt/issues/1815, + https://github.com/fmtlib/fmt/pull/1829). Thanks @alexezeder. + +- Added support for the append mode to the experimental file API and + improved `fcntl.h` detection. + (https://github.com/fmtlib/fmt/pull/1847, + https://github.com/fmtlib/fmt/pull/1848). Thanks @t-wiser. + +- Fixed handling of types that have both an implicit conversion + operator and an overloaded `ostream` insertion operator + (https://github.com/fmtlib/fmt/issues/1766). + +- Fixed a slicing issue in an internal iterator type + (https://github.com/fmtlib/fmt/pull/1822). Thanks @BRevzin. + +- Fixed an issue in locale-specific integer formatting + (https://github.com/fmtlib/fmt/issues/1927). + +- Fixed handling of exotic code unit types + (https://github.com/fmtlib/fmt/issues/1870, + https://github.com/fmtlib/fmt/issues/1932). + +- Improved `FMT_ALWAYS_INLINE` + (https://github.com/fmtlib/fmt/pull/1878). Thanks @jk-jeon. + +- Removed dependency on `windows.h` + (https://github.com/fmtlib/fmt/pull/1900). Thanks @bernd5. + +- Optimized counting of decimal digits on MSVC + (https://github.com/fmtlib/fmt/pull/1890). Thanks @mwinterb. + +- Improved documentation + (https://github.com/fmtlib/fmt/issues/1772, + https://github.com/fmtlib/fmt/pull/1775, + https://github.com/fmtlib/fmt/pull/1792, + https://github.com/fmtlib/fmt/pull/1838, + https://github.com/fmtlib/fmt/pull/1888, + https://github.com/fmtlib/fmt/pull/1918, + https://github.com/fmtlib/fmt/pull/1939). + Thanks @leolchat, @pepsiman, @Klaim, @ravijanjam, @francesco-st and @udnaan. + +- Added the `FMT_REDUCE_INT_INSTANTIATIONS` CMake option that reduces + the binary code size at the cost of some integer formatting + performance. This can be useful for extremely memory-constrained + embedded systems + (https://github.com/fmtlib/fmt/issues/1778, + https://github.com/fmtlib/fmt/pull/1781). Thanks @kammce. + +- Added the `FMT_USE_INLINE_NAMESPACES` macro to control usage of + inline namespaces + (https://github.com/fmtlib/fmt/pull/1945). Thanks @darklukee. + +- Improved build configuration + (https://github.com/fmtlib/fmt/pull/1760, + https://github.com/fmtlib/fmt/pull/1770, + https://github.com/fmtlib/fmt/issues/1779, + https://github.com/fmtlib/fmt/pull/1783, + https://github.com/fmtlib/fmt/pull/1823). + Thanks @dvetutnev, @xvitaly, @tambry, @medithe and @martinwuehrer. + +- Fixed various warnings and compilation issues + (https://github.com/fmtlib/fmt/pull/1790, + https://github.com/fmtlib/fmt/pull/1802, + https://github.com/fmtlib/fmt/pull/1808, + https://github.com/fmtlib/fmt/issues/1810, + https://github.com/fmtlib/fmt/issues/1811, + https://github.com/fmtlib/fmt/pull/1812, + https://github.com/fmtlib/fmt/pull/1814, + https://github.com/fmtlib/fmt/pull/1816, + https://github.com/fmtlib/fmt/pull/1817, + https://github.com/fmtlib/fmt/pull/1818, + https://github.com/fmtlib/fmt/issues/1825, + https://github.com/fmtlib/fmt/pull/1836, + https://github.com/fmtlib/fmt/pull/1855, + https://github.com/fmtlib/fmt/pull/1856, + https://github.com/fmtlib/fmt/pull/1860, + https://github.com/fmtlib/fmt/pull/1877, + https://github.com/fmtlib/fmt/pull/1879, + https://github.com/fmtlib/fmt/pull/1880, + https://github.com/fmtlib/fmt/issues/1896, + https://github.com/fmtlib/fmt/pull/1897, + https://github.com/fmtlib/fmt/pull/1898, + https://github.com/fmtlib/fmt/issues/1904, + https://github.com/fmtlib/fmt/pull/1908, + https://github.com/fmtlib/fmt/issues/1911, + https://github.com/fmtlib/fmt/issues/1912, + https://github.com/fmtlib/fmt/issues/1928, + https://github.com/fmtlib/fmt/pull/1929, + https://github.com/fmtlib/fmt/issues/1935, + https://github.com/fmtlib/fmt/pull/1937, + https://github.com/fmtlib/fmt/pull/1942, + https://github.com/fmtlib/fmt/issues/1949). + Thanks @TheQwertiest, @medithe, @martinwuehrer, @n16h7hunt3r, @Othereum, + @gsjaardema, @AlexanderLanin, @gcerretani, @chronoxor, @noizefloor, + @akohlmey, @jk-jeon, @rimathia, @rglarix, @moiwi, @heckad, @MarcDirven. + @BartSiwek and @darklukee. + +# 7.0.3 - 2020-08-06 + +- Worked around broken `numeric_limits` for 128-bit integers + (https://github.com/fmtlib/fmt/issues/1787). +- Added error reporting on missing named arguments + (https://github.com/fmtlib/fmt/issues/1796). +- Stopped using 128-bit integers with clang-cl + (https://github.com/fmtlib/fmt/pull/1800). Thanks @Kingcom. +- Fixed issues in locale-specific integer formatting + (https://github.com/fmtlib/fmt/issues/1782, + https://github.com/fmtlib/fmt/issues/1801). + +# 7.0.2 - 2020-07-29 + +- Worked around broken `numeric_limits` for 128-bit integers + (https://github.com/fmtlib/fmt/issues/1725). +- Fixed compatibility with CMake 3.4 + (https://github.com/fmtlib/fmt/issues/1779). +- Fixed handling of digit separators in locale-specific formatting + (https://github.com/fmtlib/fmt/issues/1782). + +# 7.0.1 - 2020-07-07 + +- Updated the inline version namespace name. +- Worked around a gcc bug in mangling of alias templates + (https://github.com/fmtlib/fmt/issues/1753). +- Fixed a linkage error on Windows + (https://github.com/fmtlib/fmt/issues/1757). Thanks @Kurkin. +- Fixed minor issues with the documentation. + +# 7.0.0 - 2020-07-05 + +- Reduced the library size. For example, on macOS a stripped test + binary statically linked with {fmt} [shrank from \~368k to less than + 100k](http://www.zverovich.net/2020/05/21/reducing-library-size.html). + +- Added a simpler and more efficient [format string compilation + API](https://fmt.dev/7.0.0/api.html#compile-api): + + ```c++ + #include + + // Converts 42 into std::string using the most efficient method and no + // runtime format string processing. + std::string s = fmt::format(FMT_COMPILE("{}"), 42); + ``` + + The old `fmt::compile` API is now deprecated. + +- Optimized integer formatting: `format_to` with format string + compilation and a stack-allocated buffer is now [faster than + to_chars on both libc++ and + libstdc++](http://www.zverovich.net/2020/06/13/fast-int-to-string-revisited.html). + +- Optimized handling of small format strings. For example, + + ```c++ + fmt::format("Result: {}: ({},{},{},{})", str1, str2, str3, str4, str5) + ``` + + is now \~40% faster + (https://github.com/fmtlib/fmt/issues/1685). + +- Applied extern templates to improve compile times when using the + core API and `fmt/format.h` + (https://github.com/fmtlib/fmt/issues/1452). For example, + on macOS with clang the compile time of a test translation unit + dropped from 2.3s to 0.3s with `-O2` and from 0.6s to 0.3s with the + default settings (`-O0`). + + Before (`-O2`): + + % time c++ -c test.cc -I include -std=c++17 -O2 + c++ -c test.cc -I include -std=c++17 -O2 2.22s user 0.08s system 99% cpu 2.311 total + + After (`-O2`): + + % time c++ -c test.cc -I include -std=c++17 -O2 + c++ -c test.cc -I include -std=c++17 -O2 0.26s user 0.04s system 98% cpu 0.303 total + + Before (default): + + % time c++ -c test.cc -I include -std=c++17 + c++ -c test.cc -I include -std=c++17 0.53s user 0.06s system 98% cpu 0.601 total + + After (default): + + % time c++ -c test.cc -I include -std=c++17 + c++ -c test.cc -I include -std=c++17 0.24s user 0.06s system 98% cpu 0.301 total + + It is still recommended to use `fmt/core.h` instead of + `fmt/format.h` but the compile time difference is now smaller. + Thanks @alex3d for the suggestion. + +- Named arguments are now stored on stack (no dynamic memory + allocations) and the compiled code is more compact and efficient. + For example + + ```c++ + #include + + int main() { + fmt::print("The answer is {answer}\n", fmt::arg("answer", 42)); + } + ``` + + compiles to just ([godbolt](https://godbolt.org/z/NcfEp_)) + + ```asm + .LC0: + .string "answer" + .LC1: + .string "The answer is {answer}\n" + main: + sub rsp, 56 + mov edi, OFFSET FLAT:.LC1 + mov esi, 23 + movabs rdx, 4611686018427387905 + lea rax, [rsp+32] + lea rcx, [rsp+16] + mov QWORD PTR [rsp+8], 1 + mov QWORD PTR [rsp], rax + mov DWORD PTR [rsp+16], 42 + mov QWORD PTR [rsp+32], OFFSET FLAT:.LC0 + mov DWORD PTR [rsp+40], 0 + call fmt::v6::vprint(fmt::v6::basic_string_view, + fmt::v6::format_args) + xor eax, eax + add rsp, 56 + ret + + .L.str.1: + .asciz "answer" + ``` + +- Implemented compile-time checks for dynamic width and precision + (https://github.com/fmtlib/fmt/issues/1614): + + ```c++ + #include + + int main() { + fmt::print(FMT_STRING("{0:{1}}"), 42); + } + ``` + + now gives a compilation error because argument 1 doesn\'t exist: + + In file included from test.cc:1: + include/fmt/format.h:2726:27: error: constexpr variable 'invalid_format' must be + initialized by a constant expression + FMT_CONSTEXPR_DECL bool invalid_format = + ^ + ... + include/fmt/core.h:569:26: note: in call to + '&checker(s, {}).context_->on_error(&"argument not found"[0])' + if (id >= num_args_) on_error("argument not found"); + ^ + +- Added sentinel support to `fmt::join` + (https://github.com/fmtlib/fmt/pull/1689) + + ```c++ + struct zstring_sentinel {}; + bool operator==(const char* p, zstring_sentinel) { return *p == '\0'; } + bool operator!=(const char* p, zstring_sentinel) { return *p != '\0'; } + + struct zstring { + const char* p; + const char* begin() const { return p; } + zstring_sentinel end() const { return {}; } + }; + + auto s = fmt::format("{}", fmt::join(zstring{"hello"}, "_")); + // s == "h_e_l_l_o" + ``` + + Thanks @BRevzin. + +- Added support for named arguments, `clear` and `reserve` to + `dynamic_format_arg_store` + (https://github.com/fmtlib/fmt/issues/1655, + https://github.com/fmtlib/fmt/pull/1663, + https://github.com/fmtlib/fmt/pull/1674, + https://github.com/fmtlib/fmt/pull/1677). Thanks @vsolontsov-ll. + +- Added support for the `'c'` format specifier to integral types for + compatibility with `std::format` + (https://github.com/fmtlib/fmt/issues/1652). + +- Replaced the `'n'` format specifier with `'L'` for compatibility + with `std::format` + (https://github.com/fmtlib/fmt/issues/1624). The `'n'` + specifier can be enabled via the `FMT_DEPRECATED_N_SPECIFIER` macro. + +- The `'='` format specifier is now disabled by default for + compatibility with `std::format`. It can be enabled via the + `FMT_DEPRECATED_NUMERIC_ALIGN` macro. + +- Removed the following deprecated APIs: + + - `FMT_STRING_ALIAS` and `fmt` macros - replaced by `FMT_STRING` + - `fmt::basic_string_view::char_type` - replaced by + `fmt::basic_string_view::value_type` + - `convert_to_int` + - `format_arg_store::types` + - `*parse_context` - replaced by `*format_parse_context` + - `FMT_DEPRECATED_INCLUDE_OS` + - `FMT_DEPRECATED_PERCENT` - incompatible with `std::format` + - `*writer` - replaced by compiled format API + +- Renamed the `internal` namespace to `detail` + (https://github.com/fmtlib/fmt/issues/1538). The former is + still provided as an alias if the `FMT_USE_INTERNAL` macro is + defined. + +- Improved compatibility between `fmt::printf` with the standard specs + (https://github.com/fmtlib/fmt/issues/1595, + https://github.com/fmtlib/fmt/pull/1682, + https://github.com/fmtlib/fmt/pull/1683, + https://github.com/fmtlib/fmt/pull/1687, + https://github.com/fmtlib/fmt/pull/1699). Thanks @rimathia. + +- Fixed handling of `operator<<` overloads that use `copyfmt` + (https://github.com/fmtlib/fmt/issues/1666). + +- Added the `FMT_OS` CMake option to control inclusion of OS-specific + APIs in the fmt target. This can be useful for embedded platforms + (https://github.com/fmtlib/fmt/issues/1654, + https://github.com/fmtlib/fmt/pull/1656). Thanks @kwesolowski. + +- Replaced `FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION` with the + `FMT_FUZZ` macro to prevent interfering with fuzzing of projects + using {fmt} (https://github.com/fmtlib/fmt/pull/1650). + Thanks @asraa. + +- Fixed compatibility with emscripten + (https://github.com/fmtlib/fmt/issues/1636, + https://github.com/fmtlib/fmt/pull/1637). Thanks @ArthurSonzogni. + +- Improved documentation + (https://github.com/fmtlib/fmt/issues/704, + https://github.com/fmtlib/fmt/pull/1643, + https://github.com/fmtlib/fmt/pull/1660, + https://github.com/fmtlib/fmt/pull/1681, + https://github.com/fmtlib/fmt/pull/1691, + https://github.com/fmtlib/fmt/pull/1706, + https://github.com/fmtlib/fmt/pull/1714, + https://github.com/fmtlib/fmt/pull/1721, + https://github.com/fmtlib/fmt/pull/1739, + https://github.com/fmtlib/fmt/pull/1740, + https://github.com/fmtlib/fmt/pull/1741, + https://github.com/fmtlib/fmt/pull/1751). + Thanks @senior7515, @lsr0, @puetzk, @fpelliccioni, Alexey Kuzmenko, @jelly, + @claremacrae, @jiapengwen, @gsjaardema and @alexey-milovidov. + +- Implemented various build configuration fixes and improvements + (https://github.com/fmtlib/fmt/pull/1603, + https://github.com/fmtlib/fmt/pull/1657, + https://github.com/fmtlib/fmt/pull/1702, + https://github.com/fmtlib/fmt/pull/1728). + Thanks @scramsby, @jtojnar, @orivej and @flagarde. + +- Fixed various warnings and compilation issues + (https://github.com/fmtlib/fmt/pull/1616, + https://github.com/fmtlib/fmt/issues/1620, + https://github.com/fmtlib/fmt/issues/1622, + https://github.com/fmtlib/fmt/issues/1625, + https://github.com/fmtlib/fmt/pull/1627, + https://github.com/fmtlib/fmt/issues/1628, + https://github.com/fmtlib/fmt/pull/1629, + https://github.com/fmtlib/fmt/issues/1631, + https://github.com/fmtlib/fmt/pull/1633, + https://github.com/fmtlib/fmt/pull/1649, + https://github.com/fmtlib/fmt/issues/1658, + https://github.com/fmtlib/fmt/pull/1661, + https://github.com/fmtlib/fmt/pull/1667, + https://github.com/fmtlib/fmt/issues/1668, + https://github.com/fmtlib/fmt/pull/1669, + https://github.com/fmtlib/fmt/issues/1692, + https://github.com/fmtlib/fmt/pull/1696, + https://github.com/fmtlib/fmt/pull/1697, + https://github.com/fmtlib/fmt/issues/1707, + https://github.com/fmtlib/fmt/pull/1712, + https://github.com/fmtlib/fmt/pull/1716, + https://github.com/fmtlib/fmt/pull/1722, + https://github.com/fmtlib/fmt/issues/1724, + https://github.com/fmtlib/fmt/pull/1729, + https://github.com/fmtlib/fmt/pull/1738, + https://github.com/fmtlib/fmt/issues/1742, + https://github.com/fmtlib/fmt/issues/1743, + https://github.com/fmtlib/fmt/pull/1744, + https://github.com/fmtlib/fmt/issues/1747, + https://github.com/fmtlib/fmt/pull/1750). + Thanks @gsjaardema, @gabime, @johnor, @Kurkin, @invexed, @peterbell10, + @daixtrose, @petrutlucian94, @Neargye, @ambitslix, @gabime, @erthink, + @tohammer and @0x8000-0000. + +# 6.2.1 - 2020-05-09 + +- Fixed ostream support in `sprintf` + (https://github.com/fmtlib/fmt/issues/1631). +- Fixed type detection when using implicit conversion to `string_view` + and ostream `operator<<` inconsistently + (https://github.com/fmtlib/fmt/issues/1662). + +# 6.2.0 - 2020-04-05 + +- Improved error reporting when trying to format an object of a + non-formattable type: + + ```c++ + fmt::format("{}", S()); + ``` + + now gives: + + include/fmt/core.h:1015:5: error: static_assert failed due to requirement + 'formattable' "Cannot format argument. To make type T formattable provide a + formatter specialization: + https://fmt.dev/latest/api.html#formatting-user-defined-types" + static_assert( + ^ + ... + note: in instantiation of function template specialization + 'fmt::v6::format' requested here + fmt::format("{}", S()); + ^ + + if `S` is not formattable. + +- Reduced the library size by \~10%. + +- Always print decimal point if `#` is specified + (https://github.com/fmtlib/fmt/issues/1476, + https://github.com/fmtlib/fmt/issues/1498): + + ```c++ + fmt::print("{:#.0f}", 42.0); + ``` + + now prints `42.` + +- Implemented the `'L'` specifier for locale-specific numeric + formatting to improve compatibility with `std::format`. The `'n'` + specifier is now deprecated and will be removed in the next major + release. + +- Moved OS-specific APIs such as `windows_error` from `fmt/format.h` + to `fmt/os.h`. You can define `FMT_DEPRECATED_INCLUDE_OS` to + automatically include `fmt/os.h` from `fmt/format.h` for + compatibility but this will be disabled in the next major release. + +- Added precision overflow detection in floating-point formatting. + +- Implemented detection of invalid use of `fmt::arg`. + +- Used `type_identity` to block unnecessary template argument + deduction. Thanks Tim Song. + +- Improved UTF-8 handling + (https://github.com/fmtlib/fmt/issues/1109): + + ```c++ + fmt::print("┌{0:─^{2}}┐\n" + "│{1: ^{2}}│\n" + "└{0:─^{2}}┘\n", "", "Привет, мир!", 20); + ``` + + now prints: + + ┌────────────────────┐ + │ Привет, мир! │ + └────────────────────┘ + + on systems that support Unicode. + +- Added experimental dynamic argument storage + (https://github.com/fmtlib/fmt/issues/1170, + https://github.com/fmtlib/fmt/pull/1584): + + ```c++ + fmt::dynamic_format_arg_store store; + store.push_back("answer"); + store.push_back(42); + fmt::vprint("The {} is {}.\n", store); + ``` + + prints: + + The answer is 42. + + Thanks @vsolontsov-ll. + +- Made `fmt::join` accept `initializer_list` + (https://github.com/fmtlib/fmt/pull/1591). Thanks @Rapotkinnik. + +- Fixed handling of empty tuples + (https://github.com/fmtlib/fmt/issues/1588). + +- Fixed handling of output iterators in `format_to_n` + (https://github.com/fmtlib/fmt/issues/1506). + +- Fixed formatting of `std::chrono::duration` types to wide output + (https://github.com/fmtlib/fmt/pull/1533). Thanks @zeffy. + +- Added const `begin` and `end` overload to buffers + (https://github.com/fmtlib/fmt/pull/1553). Thanks @dominicpoeschko. + +- Added the ability to disable floating-point formatting via + `FMT_USE_FLOAT`, `FMT_USE_DOUBLE` and `FMT_USE_LONG_DOUBLE` macros + for extremely memory-constrained embedded system + (https://github.com/fmtlib/fmt/pull/1590). Thanks @albaguirre. + +- Made `FMT_STRING` work with `constexpr` `string_view` + (https://github.com/fmtlib/fmt/pull/1589). Thanks @scramsby. + +- Implemented a minor optimization in the format string parser + (https://github.com/fmtlib/fmt/pull/1560). Thanks @IkarusDeveloper. + +- Improved attribute detection + (https://github.com/fmtlib/fmt/pull/1469, + https://github.com/fmtlib/fmt/pull/1475, + https://github.com/fmtlib/fmt/pull/1576). + Thanks @federico-busato, @chronoxor and @refnum. + +- Improved documentation + (https://github.com/fmtlib/fmt/pull/1481, + https://github.com/fmtlib/fmt/pull/1523). + Thanks @JackBoosY and @imba-tjd. + +- Fixed symbol visibility on Linux when compiling with + `-fvisibility=hidden` + (https://github.com/fmtlib/fmt/pull/1535). Thanks @milianw. + +- Implemented various build configuration fixes and improvements + (https://github.com/fmtlib/fmt/issues/1264, + https://github.com/fmtlib/fmt/issues/1460, + https://github.com/fmtlib/fmt/pull/1534, + https://github.com/fmtlib/fmt/issues/1536, + https://github.com/fmtlib/fmt/issues/1545, + https://github.com/fmtlib/fmt/pull/1546, + https://github.com/fmtlib/fmt/issues/1566, + https://github.com/fmtlib/fmt/pull/1582, + https://github.com/fmtlib/fmt/issues/1597, + https://github.com/fmtlib/fmt/pull/1598). + Thanks @ambitslix, @jwillikers and @stac47. + +- Fixed various warnings and compilation issues + (https://github.com/fmtlib/fmt/pull/1433, + https://github.com/fmtlib/fmt/issues/1461, + https://github.com/fmtlib/fmt/pull/1470, + https://github.com/fmtlib/fmt/pull/1480, + https://github.com/fmtlib/fmt/pull/1485, + https://github.com/fmtlib/fmt/pull/1492, + https://github.com/fmtlib/fmt/issues/1493, + https://github.com/fmtlib/fmt/issues/1504, + https://github.com/fmtlib/fmt/pull/1505, + https://github.com/fmtlib/fmt/pull/1512, + https://github.com/fmtlib/fmt/issues/1515, + https://github.com/fmtlib/fmt/pull/1516, + https://github.com/fmtlib/fmt/pull/1518, + https://github.com/fmtlib/fmt/pull/1519, + https://github.com/fmtlib/fmt/pull/1520, + https://github.com/fmtlib/fmt/pull/1521, + https://github.com/fmtlib/fmt/pull/1522, + https://github.com/fmtlib/fmt/issues/1524, + https://github.com/fmtlib/fmt/pull/1530, + https://github.com/fmtlib/fmt/issues/1531, + https://github.com/fmtlib/fmt/pull/1532, + https://github.com/fmtlib/fmt/issues/1539, + https://github.com/fmtlib/fmt/issues/1547, + https://github.com/fmtlib/fmt/issues/1548, + https://github.com/fmtlib/fmt/pull/1554, + https://github.com/fmtlib/fmt/issues/1567, + https://github.com/fmtlib/fmt/pull/1568, + https://github.com/fmtlib/fmt/pull/1569, + https://github.com/fmtlib/fmt/pull/1571, + https://github.com/fmtlib/fmt/pull/1573, + https://github.com/fmtlib/fmt/pull/1575, + https://github.com/fmtlib/fmt/pull/1581, + https://github.com/fmtlib/fmt/issues/1583, + https://github.com/fmtlib/fmt/issues/1586, + https://github.com/fmtlib/fmt/issues/1587, + https://github.com/fmtlib/fmt/issues/1594, + https://github.com/fmtlib/fmt/pull/1596, + https://github.com/fmtlib/fmt/issues/1604, + https://github.com/fmtlib/fmt/pull/1606, + https://github.com/fmtlib/fmt/issues/1607, + https://github.com/fmtlib/fmt/issues/1609). + Thanks @marti4d, @iPherian, @parkertomatoes, @gsjaardema, @chronoxor, + @DanielaE, @torsten48, @tohammer, @lefticus, @ryusakki, @adnsv, @fghzxm, + @refnum, @pramodk, @Spirrwell and @scramsby. + +# 6.1.2 - 2019-12-11 + +- Fixed ABI compatibility with `libfmt.so.6.0.0` + (https://github.com/fmtlib/fmt/issues/1471). +- Fixed handling types convertible to `std::string_view` + (https://github.com/fmtlib/fmt/pull/1451). Thanks @denizevrenci. +- Made CUDA test an opt-in enabled via the `FMT_CUDA_TEST` CMake + option. +- Fixed sign conversion warnings + (https://github.com/fmtlib/fmt/pull/1440). Thanks @0x8000-0000. + +# 6.1.1 - 2019-12-04 + +- Fixed shared library build on Windows + (https://github.com/fmtlib/fmt/pull/1443, + https://github.com/fmtlib/fmt/issues/1445, + https://github.com/fmtlib/fmt/pull/1446, + https://github.com/fmtlib/fmt/issues/1450). + Thanks @egorpugin and @bbolli. +- Added a missing decimal point in exponent notation with trailing + zeros. +- Removed deprecated `format_arg_store::TYPES`. + +# 6.1.0 - 2019-12-01 + +- {fmt} now formats IEEE 754 `float` and `double` using the shortest + decimal representation with correct rounding by default: + + ```c++ + #include + #include + + int main() { + fmt::print("{}", M_PI); + } + ``` + + prints `3.141592653589793`. + +- Made the fast binary to decimal floating-point formatter the + default, simplified it and improved performance. {fmt} is now 15 + times faster than libc++\'s `std::ostringstream`, 11 times faster + than `printf` and 10% faster than double-conversion on + [dtoa-benchmark](https://github.com/fmtlib/dtoa-benchmark): + + | Function | Time (ns) | Speedup | + | ------------- | --------: | ------: | + | ostringstream | 1,346.30 | 1.00x | + | ostrstream | 1,195.74 | 1.13x | + | sprintf | 995.08 | 1.35x | + | doubleconv | 99.10 | 13.59x | + | fmt | 88.34 | 15.24x | + + ![](https://user-images.githubusercontent.com/576385/69767160-cdaca400-112f-11ea-9fc5-347c9f83caad.png) + +- {fmt} no longer converts `float` arguments to `double`. In + particular this improves the default (shortest) representation of + floats and makes `fmt::format` consistent with `std::format` specs + (https://github.com/fmtlib/fmt/issues/1336, + https://github.com/fmtlib/fmt/issues/1353, + https://github.com/fmtlib/fmt/pull/1360, + https://github.com/fmtlib/fmt/pull/1361): + + ```c++ + fmt::print("{}", 0.1f); + ``` + + prints `0.1` instead of `0.10000000149011612`. + + Thanks @orivej. + +- Made floating-point formatting output consistent with + `printf`/iostreams + (https://github.com/fmtlib/fmt/issues/1376, + https://github.com/fmtlib/fmt/issues/1417). + +- Added support for 128-bit integers + (https://github.com/fmtlib/fmt/pull/1287): + + ```c++ + fmt::print("{}", std::numeric_limits<__int128_t>::max()); + ``` + + prints `170141183460469231731687303715884105727`. + + Thanks @denizevrenci. + +- The overload of `print` that takes `text_style` is now atomic, i.e. + the output from different threads doesn\'t interleave + (https://github.com/fmtlib/fmt/pull/1351). Thanks @tankiJong. + +- Made compile time in the header-only mode \~20% faster by reducing + the number of template instantiations. `wchar_t` overload of + `vprint` was moved from `fmt/core.h` to `fmt/format.h`. + +- Added an overload of `fmt::join` that works with tuples + (https://github.com/fmtlib/fmt/issues/1322, + https://github.com/fmtlib/fmt/pull/1330): + + ```c++ + #include + #include + + int main() { + std::tuple t{'a', 1, 2.0f}; + fmt::print("{}", t); + } + ``` + + prints `('a', 1, 2.0)`. + + Thanks @jeremyong. + +- Changed formatting of octal zero with prefix from \"00\" to \"0\": + + ```c++ + fmt::print("{:#o}", 0); + ``` + + prints `0`. + +- The locale is now passed to ostream insertion (`<<`) operators + (https://github.com/fmtlib/fmt/pull/1406): + + ```c++ + #include + #include + + struct S { + double value; + }; + + std::ostream& operator<<(std::ostream& os, S s) { + return os << s.value; + } + + int main() { + auto s = fmt::format(std::locale("fr_FR.UTF-8"), "{}", S{0.42}); + // s == "0,42" + } + ``` + + Thanks @dlaugt. + +- Locale-specific number formatting now uses grouping + (https://github.com/fmtlib/fmt/issues/1393, + https://github.com/fmtlib/fmt/pull/1394). Thanks @skrdaniel. + +- Fixed handling of types with deleted implicit rvalue conversion to + `const char**` (https://github.com/fmtlib/fmt/issues/1421): + + ```c++ + struct mystring { + operator const char*() const&; + operator const char*() &; + operator const char*() const&& = delete; + operator const char*() && = delete; + }; + mystring str; + fmt::print("{}", str); // now compiles + ``` + +- Enums are now mapped to correct underlying types instead of `int` + (https://github.com/fmtlib/fmt/pull/1286). Thanks @agmt. + +- Enum classes are no longer implicitly converted to `int` + (https://github.com/fmtlib/fmt/issues/1424). + +- Added `basic_format_parse_context` for consistency with C++20 + `std::format` and deprecated `basic_parse_context`. + +- Fixed handling of UTF-8 in precision + (https://github.com/fmtlib/fmt/issues/1389, + https://github.com/fmtlib/fmt/pull/1390). Thanks @tajtiattila. + +- {fmt} can now be installed on Linux, macOS and Windows with + [Conda](https://docs.conda.io/en/latest/) using its + [conda-forge](https://conda-forge.org) + [package](https://github.com/conda-forge/fmt-feedstock) + (https://github.com/fmtlib/fmt/pull/1410): + + conda install -c conda-forge fmt + + Thanks @tdegeus. + +- Added a CUDA test (https://github.com/fmtlib/fmt/pull/1285, + https://github.com/fmtlib/fmt/pull/1317). + Thanks @luncliff and @risa2000. + +- Improved documentation + (https://github.com/fmtlib/fmt/pull/1276, + https://github.com/fmtlib/fmt/issues/1291, + https://github.com/fmtlib/fmt/issues/1296, + https://github.com/fmtlib/fmt/pull/1315, + https://github.com/fmtlib/fmt/pull/1332, + https://github.com/fmtlib/fmt/pull/1337, + https://github.com/fmtlib/fmt/issues/1395 + https://github.com/fmtlib/fmt/pull/1418). + Thanks @waywardmonkeys, @pauldreik and @jackoalan. + +- Various code improvements + (https://github.com/fmtlib/fmt/pull/1358, + https://github.com/fmtlib/fmt/pull/1407). + Thanks @orivej and @dpacbach. + +- Fixed compile-time format string checks for user-defined types + (https://github.com/fmtlib/fmt/issues/1292). + +- Worked around a false positive in `unsigned-integer-overflow` sanitizer + (https://github.com/fmtlib/fmt/issues/1377). + +- Fixed various warnings and compilation issues + (https://github.com/fmtlib/fmt/issues/1273, + https://github.com/fmtlib/fmt/pull/1278, + https://github.com/fmtlib/fmt/pull/1280, + https://github.com/fmtlib/fmt/issues/1281, + https://github.com/fmtlib/fmt/issues/1288, + https://github.com/fmtlib/fmt/pull/1290, + https://github.com/fmtlib/fmt/pull/1301, + https://github.com/fmtlib/fmt/issues/1305, + https://github.com/fmtlib/fmt/issues/1306, + https://github.com/fmtlib/fmt/issues/1309, + https://github.com/fmtlib/fmt/pull/1312, + https://github.com/fmtlib/fmt/issues/1313, + https://github.com/fmtlib/fmt/issues/1316, + https://github.com/fmtlib/fmt/issues/1319, + https://github.com/fmtlib/fmt/pull/1320, + https://github.com/fmtlib/fmt/pull/1326, + https://github.com/fmtlib/fmt/pull/1328, + https://github.com/fmtlib/fmt/issues/1344, + https://github.com/fmtlib/fmt/pull/1345, + https://github.com/fmtlib/fmt/pull/1347, + https://github.com/fmtlib/fmt/pull/1349, + https://github.com/fmtlib/fmt/issues/1354, + https://github.com/fmtlib/fmt/issues/1362, + https://github.com/fmtlib/fmt/issues/1366, + https://github.com/fmtlib/fmt/pull/1364, + https://github.com/fmtlib/fmt/pull/1370, + https://github.com/fmtlib/fmt/pull/1371, + https://github.com/fmtlib/fmt/issues/1385, + https://github.com/fmtlib/fmt/issues/1388, + https://github.com/fmtlib/fmt/pull/1397, + https://github.com/fmtlib/fmt/pull/1414, + https://github.com/fmtlib/fmt/pull/1416, + https://github.com/fmtlib/fmt/issues/1422 + https://github.com/fmtlib/fmt/pull/1427, + https://github.com/fmtlib/fmt/issues/1431, + https://github.com/fmtlib/fmt/pull/1433). + Thanks @hhb, @gsjaardema, @gabime, @neheb, @vedranmiletic, @dkavolis, + @mwinterb, @orivej, @denizevrenci, @leonklingele, @chronoxor, @kent-tri, + @0x8000-0000 and @marti4d. + +# 6.0.0 - 2019-08-26 + +- Switched to the [MIT license]( + https://github.com/fmtlib/fmt/blob/5a4b24613ba16cc689977c3b5bd8274a3ba1dd1f/LICENSE.rst) + with an optional exception that allows distributing binary code + without attribution. + +- Floating-point formatting is now locale-independent by default: + + ```c++ + #include + #include + + int main() { + std::locale::global(std::locale("ru_RU.UTF-8")); + fmt::print("value = {}", 4.2); + } + ``` + + prints \"value = 4.2\" regardless of the locale. + + For locale-specific formatting use the `n` specifier: + + ```c++ + std::locale::global(std::locale("ru_RU.UTF-8")); + fmt::print("value = {:n}", 4.2); + ``` + + prints \"value = 4,2\". + +- Added an experimental Grisu floating-point formatting algorithm + implementation (disabled by default). To enable it compile with the + `FMT_USE_GRISU` macro defined to 1: + + ```c++ + #define FMT_USE_GRISU 1 + #include + + auto s = fmt::format("{}", 4.2); // formats 4.2 using Grisu + ``` + + With Grisu enabled, {fmt} is 13x faster than `std::ostringstream` + (libc++) and 10x faster than `sprintf` on + [dtoa-benchmark](https://github.com/fmtlib/dtoa-benchmark) ([full + results](https://fmt.dev/unknown_mac64_clang10.0.html)): + + ![](https://user-images.githubusercontent.com/576385/54883977-9fe8c000-4e28-11e9-8bde-272d122e7c52.jpg) + +- Separated formatting and parsing contexts for consistency with + [C++20 std::format](http://eel.is/c++draft/format), removing the + undocumented `basic_format_context::parse_context()` function. + +- Added [oss-fuzz](https://github.com/google/oss-fuzz) support + (https://github.com/fmtlib/fmt/pull/1199). Thanks @pauldreik. + +- `formatter` specializations now always take precedence over + `operator<<` (https://github.com/fmtlib/fmt/issues/952): + + ```c++ + #include + #include + + struct S {}; + + std::ostream& operator<<(std::ostream& os, S) { + return os << 1; + } + + template <> + struct fmt::formatter : fmt::formatter { + auto format(S, format_context& ctx) { + return formatter::format(2, ctx); + } + }; + + int main() { + std::cout << S() << "\n"; // prints 1 using operator<< + fmt::print("{}\n", S()); // prints 2 using formatter + } + ``` + +- Introduced the experimental `fmt::compile` function that does format + string compilation + (https://github.com/fmtlib/fmt/issues/618, + https://github.com/fmtlib/fmt/issues/1169, + https://github.com/fmtlib/fmt/pull/1171): + + ```c++ + #include + + auto f = fmt::compile("{}"); + std::string s = fmt::format(f, 42); // can be called multiple times to + // format different values + // s == "42" + ``` + + It moves the cost of parsing a format string outside of the format + function which can be beneficial when identically formatting many + objects of the same types. Thanks @stryku. + +- Added experimental `%` format specifier that formats floating-point + values as percentages + (https://github.com/fmtlib/fmt/pull/1060, + https://github.com/fmtlib/fmt/pull/1069, + https://github.com/fmtlib/fmt/pull/1071): + + ```c++ + auto s = fmt::format("{:.1%}", 0.42); // s == "42.0%" + ``` + + Thanks @gawain-bolton. + +- Implemented precision for floating-point durations + (https://github.com/fmtlib/fmt/issues/1004, + https://github.com/fmtlib/fmt/pull/1012): + + ```c++ + auto s = fmt::format("{:.1}", std::chrono::duration(1.234)); + // s == 1.2s + ``` + + Thanks @DanielaE. + +- Implemented `chrono` format specifiers `%Q` and `%q` that give the + value and the unit respectively + (https://github.com/fmtlib/fmt/pull/1019): + + ```c++ + auto value = fmt::format("{:%Q}", 42s); // value == "42" + auto unit = fmt::format("{:%q}", 42s); // unit == "s" + ``` + + Thanks @DanielaE. + +- Fixed handling of dynamic width in chrono formatter: + + ```c++ + auto s = fmt::format("{0:{1}%H:%M:%S}", std::chrono::seconds(12345), 12); + // ^ width argument index ^ width + // s == "03:25:45 " + ``` + + Thanks Howard Hinnant. + +- Removed deprecated `fmt/time.h`. Use `fmt/chrono.h` instead. + +- Added `fmt::format` and `fmt::vformat` overloads that take + `text_style` (https://github.com/fmtlib/fmt/issues/993, + https://github.com/fmtlib/fmt/pull/994): + + ```c++ + #include + + std::string message = fmt::format(fmt::emphasis::bold | fg(fmt::color::red), + "The answer is {}.", 42); + ``` + + Thanks @Naios. + +- Removed the deprecated color API (`print_colored`). Use the new API, + namely `print` overloads that take `text_style` instead. + +- Made `std::unique_ptr` and `std::shared_ptr` formattable as pointers + via `fmt::ptr` (https://github.com/fmtlib/fmt/pull/1121): + + ```c++ + std::unique_ptr p = ...; + fmt::print("{}", fmt::ptr(p)); // prints p as a pointer + ``` + + Thanks @sighingnow. + +- Made `print` and `vprint` report I/O errors + (https://github.com/fmtlib/fmt/issues/1098, + https://github.com/fmtlib/fmt/pull/1099). Thanks @BillyDonahue. + +- Marked deprecated APIs with the `[[deprecated]]` attribute and + removed internal uses of deprecated APIs + (https://github.com/fmtlib/fmt/pull/1022). Thanks @eliaskosunen. + +- Modernized the codebase using more C++11 features and removing + workarounds. Most importantly, `buffer_context` is now an alias + template, so use `buffer_context` instead of + `buffer_context::type`. These features require GCC 4.8 or later. + +- `formatter` specializations now always take precedence over implicit + conversions to `int` and the undocumented `convert_to_int` trait is + now deprecated. + +- Moved the undocumented `basic_writer`, `writer`, and `wwriter` types + to the `internal` namespace. + +- Removed deprecated `basic_format_context::begin()`. Use `out()` + instead. + +- Disallowed passing the result of `join` as an lvalue to prevent + misuse. + +- Refactored the undocumented structs that represent parsed format + specifiers to simplify the API and allow multibyte fill. + +- Moved SFINAE to template parameters to reduce symbol sizes. + +- Switched to `fputws` for writing wide strings so that it\'s no + longer required to call `_setmode` on Windows + (https://github.com/fmtlib/fmt/issues/1229, + https://github.com/fmtlib/fmt/pull/1243). Thanks @jackoalan. + +- Improved literal-based API + (https://github.com/fmtlib/fmt/pull/1254). Thanks @sylveon. + +- Added support for exotic platforms without `uintptr_t` such as IBM i + (AS/400) which has 128-bit pointers and only 64-bit integers + (https://github.com/fmtlib/fmt/issues/1059). + +- Added [Sublime Text syntax highlighting config]( + https://github.com/fmtlib/fmt/blob/master/support/C%2B%2B.sublime-syntax) + (https://github.com/fmtlib/fmt/issues/1037). Thanks @Kronuz. + +- Added the `FMT_ENFORCE_COMPILE_STRING` macro to enforce the use of + compile-time format strings + (https://github.com/fmtlib/fmt/pull/1231). Thanks @jackoalan. + +- Stopped setting `CMAKE_BUILD_TYPE` if {fmt} is a subproject + (https://github.com/fmtlib/fmt/issues/1081). + +- Various build improvements + (https://github.com/fmtlib/fmt/pull/1039, + https://github.com/fmtlib/fmt/pull/1078, + https://github.com/fmtlib/fmt/pull/1091, + https://github.com/fmtlib/fmt/pull/1103, + https://github.com/fmtlib/fmt/pull/1177). + Thanks @luncliff, @jasonszang, @olafhering, @Lecetem and @pauldreik. + +- Improved documentation + (https://github.com/fmtlib/fmt/issues/1049, + https://github.com/fmtlib/fmt/pull/1051, + https://github.com/fmtlib/fmt/pull/1083, + https://github.com/fmtlib/fmt/pull/1113, + https://github.com/fmtlib/fmt/pull/1114, + https://github.com/fmtlib/fmt/issues/1146, + https://github.com/fmtlib/fmt/issues/1180, + https://github.com/fmtlib/fmt/pull/1250, + https://github.com/fmtlib/fmt/pull/1252, + https://github.com/fmtlib/fmt/pull/1265). + Thanks @mikelui, @foonathan, @BillyDonahue, @jwakely, @kaisbe and + @sdebionne. + +- Fixed ambiguous formatter specialization in `fmt/ranges.h` + (https://github.com/fmtlib/fmt/issues/1123). + +- Fixed formatting of a non-empty `std::filesystem::path` which is an + infinitely deep range of its components + (https://github.com/fmtlib/fmt/issues/1268). + +- Fixed handling of general output iterators when formatting + characters (https://github.com/fmtlib/fmt/issues/1056, + https://github.com/fmtlib/fmt/pull/1058). Thanks @abolz. + +- Fixed handling of output iterators in `formatter` specialization for + ranges (https://github.com/fmtlib/fmt/issues/1064). + +- Fixed handling of exotic character types + (https://github.com/fmtlib/fmt/issues/1188). + +- Made chrono formatting work with exceptions disabled + (https://github.com/fmtlib/fmt/issues/1062). + +- Fixed DLL visibility issues + (https://github.com/fmtlib/fmt/pull/1134, + https://github.com/fmtlib/fmt/pull/1147). Thanks @denchat. + +- Disabled the use of UDL template extension on GCC 9 + (https://github.com/fmtlib/fmt/issues/1148). + +- Removed misplaced `format` compile-time checks from `printf` + (https://github.com/fmtlib/fmt/issues/1173). + +- Fixed issues in the experimental floating-point formatter + (https://github.com/fmtlib/fmt/issues/1072, + https://github.com/fmtlib/fmt/issues/1129, + https://github.com/fmtlib/fmt/issues/1153, + https://github.com/fmtlib/fmt/pull/1155, + https://github.com/fmtlib/fmt/issues/1210, + https://github.com/fmtlib/fmt/issues/1222). Thanks @alabuzhev. + +- Fixed bugs discovered by fuzzing or during fuzzing integration + (https://github.com/fmtlib/fmt/issues/1124, + https://github.com/fmtlib/fmt/issues/1127, + https://github.com/fmtlib/fmt/issues/1132, + https://github.com/fmtlib/fmt/pull/1135, + https://github.com/fmtlib/fmt/issues/1136, + https://github.com/fmtlib/fmt/issues/1141, + https://github.com/fmtlib/fmt/issues/1142, + https://github.com/fmtlib/fmt/issues/1178, + https://github.com/fmtlib/fmt/issues/1179, + https://github.com/fmtlib/fmt/issues/1194). Thanks @pauldreik. + +- Fixed building tests on FreeBSD and Hurd + (https://github.com/fmtlib/fmt/issues/1043). Thanks @jackyf. + +- Fixed various warnings and compilation issues + (https://github.com/fmtlib/fmt/pull/998, + https://github.com/fmtlib/fmt/pull/1006, + https://github.com/fmtlib/fmt/issues/1008, + https://github.com/fmtlib/fmt/issues/1011, + https://github.com/fmtlib/fmt/issues/1025, + https://github.com/fmtlib/fmt/pull/1027, + https://github.com/fmtlib/fmt/pull/1028, + https://github.com/fmtlib/fmt/pull/1029, + https://github.com/fmtlib/fmt/pull/1030, + https://github.com/fmtlib/fmt/pull/1031, + https://github.com/fmtlib/fmt/pull/1054, + https://github.com/fmtlib/fmt/issues/1063, + https://github.com/fmtlib/fmt/pull/1068, + https://github.com/fmtlib/fmt/pull/1074, + https://github.com/fmtlib/fmt/pull/1075, + https://github.com/fmtlib/fmt/pull/1079, + https://github.com/fmtlib/fmt/pull/1086, + https://github.com/fmtlib/fmt/issues/1088, + https://github.com/fmtlib/fmt/pull/1089, + https://github.com/fmtlib/fmt/pull/1094, + https://github.com/fmtlib/fmt/issues/1101, + https://github.com/fmtlib/fmt/pull/1102, + https://github.com/fmtlib/fmt/issues/1105, + https://github.com/fmtlib/fmt/pull/1107, + https://github.com/fmtlib/fmt/issues/1115, + https://github.com/fmtlib/fmt/issues/1117, + https://github.com/fmtlib/fmt/issues/1118, + https://github.com/fmtlib/fmt/issues/1120, + https://github.com/fmtlib/fmt/issues/1123, + https://github.com/fmtlib/fmt/pull/1139, + https://github.com/fmtlib/fmt/issues/1140, + https://github.com/fmtlib/fmt/issues/1143, + https://github.com/fmtlib/fmt/pull/1144, + https://github.com/fmtlib/fmt/pull/1150, + https://github.com/fmtlib/fmt/pull/1151, + https://github.com/fmtlib/fmt/issues/1152, + https://github.com/fmtlib/fmt/issues/1154, + https://github.com/fmtlib/fmt/issues/1156, + https://github.com/fmtlib/fmt/pull/1159, + https://github.com/fmtlib/fmt/issues/1175, + https://github.com/fmtlib/fmt/issues/1181, + https://github.com/fmtlib/fmt/issues/1186, + https://github.com/fmtlib/fmt/pull/1187, + https://github.com/fmtlib/fmt/pull/1191, + https://github.com/fmtlib/fmt/issues/1197, + https://github.com/fmtlib/fmt/issues/1200, + https://github.com/fmtlib/fmt/issues/1203, + https://github.com/fmtlib/fmt/issues/1205, + https://github.com/fmtlib/fmt/pull/1206, + https://github.com/fmtlib/fmt/issues/1213, + https://github.com/fmtlib/fmt/issues/1214, + https://github.com/fmtlib/fmt/pull/1217, + https://github.com/fmtlib/fmt/issues/1228, + https://github.com/fmtlib/fmt/pull/1230, + https://github.com/fmtlib/fmt/issues/1232, + https://github.com/fmtlib/fmt/pull/1235, + https://github.com/fmtlib/fmt/pull/1236, + https://github.com/fmtlib/fmt/issues/1240). + Thanks @DanielaE, @mwinterb, @eliaskosunen, @morinmorin, @ricco19, + @waywardmonkeys, @chronoxor, @remyabel, @pauldreik, @gsjaardema, @rcane, + @mocabe, @denchat, @cjdb, @HazardyKnusperkeks, @vedranmiletic, @jackoalan, + @DaanDeMeyer and @starkmapper. + +# 5.3.0 - 2018-12-28 + +- Introduced experimental chrono formatting support: + + ```c++ + #include + + int main() { + using namespace std::literals::chrono_literals; + fmt::print("Default format: {} {}\n", 42s, 100ms); + fmt::print("strftime-like format: {:%H:%M:%S}\n", 3h + 15min + 30s); + } + ``` + + prints: + + Default format: 42s 100ms + strftime-like format: 03:15:30 + +- Added experimental support for emphasis (bold, italic, underline, + strikethrough), colored output to a file stream, and improved + colored formatting API + (https://github.com/fmtlib/fmt/pull/961, + https://github.com/fmtlib/fmt/pull/967, + https://github.com/fmtlib/fmt/pull/973): + + ```c++ + #include + + int main() { + print(fg(fmt::color::crimson) | fmt::emphasis::bold, + "Hello, {}!\n", "world"); + print(fg(fmt::color::floral_white) | bg(fmt::color::slate_gray) | + fmt::emphasis::underline, "Hello, {}!\n", "мир"); + print(fg(fmt::color::steel_blue) | fmt::emphasis::italic, + "Hello, {}!\n", "世界"); + } + ``` + + prints the following on modern terminals with RGB color support: + + ![](https://user-images.githubusercontent.com/576385/50405788-b66e7500-076e-11e9-9592-7324d1f951d8.png) + + Thanks @Rakete1111. + +- Added support for 4-bit terminal colors + (https://github.com/fmtlib/fmt/issues/968, + https://github.com/fmtlib/fmt/pull/974) + + ```c++ + #include + + int main() { + print(fg(fmt::terminal_color::red), "stop\n"); + } + ``` + + Note that these colors vary by terminal: + + ![](https://user-images.githubusercontent.com/576385/50405925-dbfc7e00-0770-11e9-9b85-333fab0af9ac.png) + + Thanks @Rakete1111. + +- Parameterized formatting functions on the type of the format string + (https://github.com/fmtlib/fmt/issues/880, + https://github.com/fmtlib/fmt/pull/881, + https://github.com/fmtlib/fmt/pull/883, + https://github.com/fmtlib/fmt/pull/885, + https://github.com/fmtlib/fmt/pull/897, + https://github.com/fmtlib/fmt/issues/920). Any object of + type `S` that has an overloaded `to_string_view(const S&)` returning + `fmt::string_view` can be used as a format string: + + ```c++ + namespace my_ns { + inline string_view to_string_view(const my_string& s) { + return {s.data(), s.length()}; + } + } + + std::string message = fmt::format(my_string("The answer is {}."), 42); + ``` + + Thanks @DanielaE. + +- Made `std::string_view` work as a format string + (https://github.com/fmtlib/fmt/pull/898): + + ```c++ + auto message = fmt::format(std::string_view("The answer is {}."), 42); + ``` + + Thanks @DanielaE. + +- Added wide string support to compile-time format string checks + (https://github.com/fmtlib/fmt/pull/924): + + ```c++ + print(fmt(L"{:f}"), 42); // compile-time error: invalid type specifier + ``` + + Thanks @XZiar. + +- Made colored print functions work with wide strings + (https://github.com/fmtlib/fmt/pull/867): + + ```c++ + #include + + int main() { + print(fg(fmt::color::red), L"{}\n", 42); + } + ``` + + Thanks @DanielaE. + +- Introduced experimental Unicode support + (https://github.com/fmtlib/fmt/issues/628, + https://github.com/fmtlib/fmt/pull/891): + + ```c++ + using namespace fmt::literals; + auto s = fmt::format("{:*^5}"_u, "🤡"_u); // s == "**🤡**"_u + ``` + +- Improved locale support: + + ```c++ + #include + + struct numpunct : std::numpunct { + protected: + char do_thousands_sep() const override { return '~'; } + }; + + std::locale loc; + auto s = fmt::format(std::locale(loc, new numpunct()), "{:n}", 1234567); + // s == "1~234~567" + ``` + +- Constrained formatting functions on proper iterator types + (https://github.com/fmtlib/fmt/pull/921). Thanks @DanielaE. + +- Added `make_printf_args` and `make_wprintf_args` functions + (https://github.com/fmtlib/fmt/pull/934). Thanks @tnovotny. + +- Deprecated `fmt::visit`, `parse_context`, and `wparse_context`. Use + `fmt::visit_format_arg`, `format_parse_context`, and + `wformat_parse_context` instead. + +- Removed undocumented `basic_fixed_buffer` which has been superseded + by the iterator-based API + (https://github.com/fmtlib/fmt/issues/873, + https://github.com/fmtlib/fmt/pull/902). Thanks @superfunc. + +- Disallowed repeated leading zeros in an argument ID: + + ```c++ + fmt::print("{000}", 42); // error + ``` + +- Reintroduced support for gcc 4.4. + +- Fixed compilation on platforms with exotic `double` + (https://github.com/fmtlib/fmt/issues/878). + +- Improved documentation + (https://github.com/fmtlib/fmt/issues/164, + https://github.com/fmtlib/fmt/issues/877, + https://github.com/fmtlib/fmt/pull/901, + https://github.com/fmtlib/fmt/pull/906, + https://github.com/fmtlib/fmt/pull/979). + Thanks @kookjr, @DarkDimius and @HecticSerenity. + +- Added pkgconfig support which makes it easier to consume the library + from meson and other build systems + (https://github.com/fmtlib/fmt/pull/916). Thanks @colemickens. + +- Various build improvements + (https://github.com/fmtlib/fmt/pull/909, + https://github.com/fmtlib/fmt/pull/926, + https://github.com/fmtlib/fmt/pull/937, + https://github.com/fmtlib/fmt/pull/953, + https://github.com/fmtlib/fmt/pull/959). + Thanks @tchaikov, @luncliff, @AndreasSchoenle, @hotwatermorning and @Zefz. + +- Improved `string_view` construction performance + (https://github.com/fmtlib/fmt/pull/914). Thanks @gabime. + +- Fixed non-matching char types + (https://github.com/fmtlib/fmt/pull/895). Thanks @DanielaE. + +- Fixed `format_to_n` with `std::back_insert_iterator` + (https://github.com/fmtlib/fmt/pull/913). Thanks @DanielaE. + +- Fixed locale-dependent formatting + (https://github.com/fmtlib/fmt/issues/905). + +- Fixed various compiler warnings and errors + (https://github.com/fmtlib/fmt/pull/882, + https://github.com/fmtlib/fmt/pull/886, + https://github.com/fmtlib/fmt/pull/933, + https://github.com/fmtlib/fmt/pull/941, + https://github.com/fmtlib/fmt/issues/931, + https://github.com/fmtlib/fmt/pull/943, + https://github.com/fmtlib/fmt/pull/954, + https://github.com/fmtlib/fmt/pull/956, + https://github.com/fmtlib/fmt/pull/962, + https://github.com/fmtlib/fmt/issues/965, + https://github.com/fmtlib/fmt/issues/977, + https://github.com/fmtlib/fmt/pull/983, + https://github.com/fmtlib/fmt/pull/989). + Thanks @Luthaf, @stevenhoving, @christinaa, @lgritz, @DanielaE, + @0x8000-0000 and @liuping1997. + +# 5.2.1 - 2018-09-21 + +- Fixed `visit` lookup issues on gcc 7 & 8 + (https://github.com/fmtlib/fmt/pull/870). Thanks @medithe. +- Fixed linkage errors on older gcc. +- Prevented `fmt/range.h` from specializing `fmt::basic_string_view` + (https://github.com/fmtlib/fmt/issues/865, + https://github.com/fmtlib/fmt/pull/868). Thanks @hhggit. +- Improved error message when formatting unknown types + (https://github.com/fmtlib/fmt/pull/872). Thanks @foonathan. +- Disabled templated user-defined literals when compiled under nvcc + (https://github.com/fmtlib/fmt/pull/875). Thanks @CandyGumdrop. +- Fixed `format_to` formatting to `wmemory_buffer` + (https://github.com/fmtlib/fmt/issues/874). + +# 5.2.0 - 2018-09-13 + +- Optimized format string parsing and argument processing which + resulted in up to 5x speed up on long format strings and significant + performance boost on various benchmarks. For example, version 5.2 is + 2.22x faster than 5.1 on decimal integer formatting with `format_to` + (macOS, clang-902.0.39.2): + + | Method | Time, s | Speedup | + | -------------------------- | --------------: | ------: | + | fmt::format 5.1 | 0.58 | | + | fmt::format 5.2 | 0.35 | 1.66x | + | fmt::format_to 5.1 | 0.51 | | + | fmt::format_to 5.2 | 0.23 | 2.22x | + | sprintf | 0.71 | | + | std::to_string | 1.01 | | + | std::stringstream | 1.73 | | + +- Changed the `fmt` macro from opt-out to opt-in to prevent name + collisions. To enable it define the `FMT_STRING_ALIAS` macro to 1 + before including `fmt/format.h`: + + ```c++ + #define FMT_STRING_ALIAS 1 + #include + std::string answer = format(fmt("{}"), 42); + ``` + +- Added compile-time format string checks to `format_to` overload that + takes `fmt::memory_buffer` + (https://github.com/fmtlib/fmt/issues/783): + + ```c++ + fmt::memory_buffer buf; + // Compile-time error: invalid type specifier. + fmt::format_to(buf, fmt("{:d}"), "foo"); + ``` + +- Moved experimental color support to `fmt/color.h` and enabled the + new API by default. The old API can be enabled by defining the + `FMT_DEPRECATED_COLORS` macro. + +- Added formatting support for types explicitly convertible to + `fmt::string_view`: + + ```c++ + struct foo { + explicit operator fmt::string_view() const { return "foo"; } + }; + auto s = format("{}", foo()); + ``` + + In particular, this makes formatting function work with + `folly::StringPiece`. + +- Implemented preliminary support for `char*_t` by replacing the + `format` function overloads with a single function template + parameterized on the string type. + +- Added support for dynamic argument lists + (https://github.com/fmtlib/fmt/issues/814, + https://github.com/fmtlib/fmt/pull/819). Thanks @MikePopoloski. + +- Reduced executable size overhead for embedded targets using newlib + nano by making locale dependency optional + (https://github.com/fmtlib/fmt/pull/839). Thanks @teajay-fr. + +- Keep `noexcept` specifier when exceptions are disabled + (https://github.com/fmtlib/fmt/issues/801, + https://github.com/fmtlib/fmt/pull/810). Thanks @qis. + +- Fixed formatting of user-defined types providing `operator<<` with + `format_to_n` (https://github.com/fmtlib/fmt/pull/806). + Thanks @mkurdej. + +- Fixed dynamic linkage of new symbols + (https://github.com/fmtlib/fmt/issues/808). + +- Fixed global initialization issue + (https://github.com/fmtlib/fmt/issues/807): + + ```c++ + // This works on compilers with constexpr support. + static const std::string answer = fmt::format("{}", 42); + ``` + +- Fixed various compiler warnings and errors + (https://github.com/fmtlib/fmt/pull/804, + https://github.com/fmtlib/fmt/issues/809, + https://github.com/fmtlib/fmt/pull/811, + https://github.com/fmtlib/fmt/issues/822, + https://github.com/fmtlib/fmt/pull/827, + https://github.com/fmtlib/fmt/issues/830, + https://github.com/fmtlib/fmt/pull/838, + https://github.com/fmtlib/fmt/issues/843, + https://github.com/fmtlib/fmt/pull/844, + https://github.com/fmtlib/fmt/issues/851, + https://github.com/fmtlib/fmt/pull/852, + https://github.com/fmtlib/fmt/pull/854). + Thanks @henryiii, @medithe, and @eliasdaler. + +# 5.1.0 - 2018-07-05 + +- Added experimental support for RGB color output enabled with the + `FMT_EXTENDED_COLORS` macro: + + ```c++ + #define FMT_EXTENDED_COLORS + #define FMT_HEADER_ONLY // or compile fmt with FMT_EXTENDED_COLORS defined + #include + + fmt::print(fmt::color::steel_blue, "Some beautiful text"); + ``` + + The old API (the `print_colored` and `vprint_colored` functions and + the `color` enum) is now deprecated. + (https://github.com/fmtlib/fmt/issues/762 + https://github.com/fmtlib/fmt/pull/767). thanks @Remotion. + +- Added quotes to strings in ranges and tuples + (https://github.com/fmtlib/fmt/pull/766). Thanks @Remotion. + +- Made `format_to` work with `basic_memory_buffer` + (https://github.com/fmtlib/fmt/issues/776). + +- Added `vformat_to_n` and `wchar_t` overload of `format_to_n` + (https://github.com/fmtlib/fmt/issues/764, + https://github.com/fmtlib/fmt/issues/769). + +- Made `is_range` and `is_tuple_like` part of public (experimental) + API to allow specialization for user-defined types + (https://github.com/fmtlib/fmt/issues/751, + https://github.com/fmtlib/fmt/pull/759). Thanks @drrlvn. + +- Added more compilers to continuous integration and increased + `FMT_PEDANTIC` warning levels + (https://github.com/fmtlib/fmt/pull/736). Thanks @eliaskosunen. + +- Fixed compilation with MSVC 2013. + +- Fixed handling of user-defined types in `format_to` + (https://github.com/fmtlib/fmt/issues/793). + +- Forced linking of inline `vformat` functions into the library + (https://github.com/fmtlib/fmt/issues/795). + +- Fixed incorrect call to on_align in `'{:}='` + (https://github.com/fmtlib/fmt/issues/750). + +- Fixed floating-point formatting to a non-back_insert_iterator with + sign & numeric alignment specified + (https://github.com/fmtlib/fmt/issues/756). + +- Fixed formatting to an array with `format_to_n` + (https://github.com/fmtlib/fmt/issues/778). + +- Fixed formatting of more than 15 named arguments + (https://github.com/fmtlib/fmt/issues/754). + +- Fixed handling of compile-time strings when including + `fmt/ostream.h`. (https://github.com/fmtlib/fmt/issues/768). + +- Fixed various compiler warnings and errors + (https://github.com/fmtlib/fmt/issues/742, + https://github.com/fmtlib/fmt/issues/748, + https://github.com/fmtlib/fmt/issues/752, + https://github.com/fmtlib/fmt/issues/770, + https://github.com/fmtlib/fmt/pull/775, + https://github.com/fmtlib/fmt/issues/779, + https://github.com/fmtlib/fmt/pull/780, + https://github.com/fmtlib/fmt/pull/790, + https://github.com/fmtlib/fmt/pull/792, + https://github.com/fmtlib/fmt/pull/800). + Thanks @Remotion, @gabime, @foonathan, @Dark-Passenger and @0x8000-0000. + +# 5.0.0 - 2018-05-21 + +- Added a requirement for partial C++11 support, most importantly + variadic templates and type traits, and dropped `FMT_VARIADIC_*` + emulation macros. Variadic templates are available since GCC 4.4, + Clang 2.9 and MSVC 18.0 (2013). For older compilers use {fmt} + [version 4.x](https://github.com/fmtlib/fmt/releases/tag/4.1.0) + which continues to be maintained and works with C++98 compilers. + +- Renamed symbols to follow standard C++ naming conventions and + proposed a subset of the library for standardization in [P0645R2 + Text Formatting](https://wg21.link/P0645). + +- Implemented `constexpr` parsing of format strings and [compile-time + format string + checks](https://fmt.dev/latest/api.html#compile-time-format-string-checks). + For example + + ```c++ + #include + + std::string s = format(fmt("{:d}"), "foo"); + ``` + + gives a compile-time error because `d` is an invalid specifier for + strings ([godbolt](https://godbolt.org/g/rnCy9Q)): + + ... + :4:19: note: in instantiation of function template specialization 'fmt::v5::format' requested here + std::string s = format(fmt("{:d}"), "foo"); + ^ + format.h:1337:13: note: non-constexpr function 'on_error' cannot be used in a constant expression + handler.on_error("invalid type specifier"); + + Compile-time checks require relaxed `constexpr` (C++14 feature) + support. If the latter is not available, checks will be performed at + runtime. + +- Separated format string parsing and formatting in the extension API + to enable compile-time format string processing. For example + + ```c++ + struct Answer {}; + + namespace fmt { + template <> + struct formatter { + constexpr auto parse(parse_context& ctx) { + auto it = ctx.begin(); + spec = *it; + if (spec != 'd' && spec != 's') + throw format_error("invalid specifier"); + return ++it; + } + + template + auto format(Answer, FormatContext& ctx) { + return spec == 's' ? + format_to(ctx.begin(), "{}", "fourty-two") : + format_to(ctx.begin(), "{}", 42); + } + + char spec = 0; + }; + } + + std::string s = format(fmt("{:x}"), Answer()); + ``` + + gives a compile-time error due to invalid format specifier + ([godbolt](https://godbolt.org/g/2jQ1Dv)): + + ... + :12:45: error: expression '' is not a constant expression + throw format_error("invalid specifier"); + +- Added [iterator + support](https://fmt.dev/latest/api.html#output-iterator-support): + + ```c++ + #include + #include + + std::vector out; + fmt::format_to(std::back_inserter(out), "{}", 42); + ``` + +- Added the + [format_to_n](https://fmt.dev/latest/api.html#_CPPv2N3fmt11format_to_nE8OutputItNSt6size_tE11string_viewDpRK4Args) + function that restricts the output to the specified number of + characters (https://github.com/fmtlib/fmt/issues/298): + + ```c++ + char out[4]; + fmt::format_to_n(out, sizeof(out), "{}", 12345); + // out == "1234" (without terminating '\0') + ``` + +- Added the [formatted_size]( + https://fmt.dev/latest/api.html#_CPPv2N3fmt14formatted_sizeE11string_viewDpRK4Args) + function for computing the output size: + + ```c++ + #include + + auto size = fmt::formatted_size("{}", 12345); // size == 5 + ``` + +- Improved compile times by reducing dependencies on standard headers + and providing a lightweight [core + API](https://fmt.dev/latest/api.html#core-api): + + ```c++ + #include + + fmt::print("The answer is {}.", 42); + ``` + + See [Compile time and code + bloat](https://github.com/fmtlib/fmt#compile-time-and-code-bloat). + +- Added the [make_format_args]( + https://fmt.dev/latest/api.html#_CPPv2N3fmt16make_format_argsEDpRK4Args) + function for capturing formatting arguments: + + ```c++ + // Prints formatted error message. + void vreport_error(const char *format, fmt::format_args args) { + fmt::print("Error: "); + fmt::vprint(format, args); + } + template + void report_error(const char *format, const Args & ... args) { + vreport_error(format, fmt::make_format_args(args...)); + } + ``` + +- Added the `make_printf_args` function for capturing `printf` + arguments (https://github.com/fmtlib/fmt/issues/687, + https://github.com/fmtlib/fmt/pull/694). Thanks @Kronuz. + +- Added prefix `v` to non-variadic functions taking `format_args` to + distinguish them from variadic ones: + + ```c++ + std::string vformat(string_view format_str, format_args args); + + template + std::string format(string_view format_str, const Args & ... args); + ``` + +- Added experimental support for formatting ranges, containers and + tuple-like types in `fmt/ranges.h` + (https://github.com/fmtlib/fmt/pull/735): + + ```c++ + #include + + std::vector v = {1, 2, 3}; + fmt::print("{}", v); // prints {1, 2, 3} + ``` + + Thanks @Remotion. + +- Implemented `wchar_t` date and time formatting + (https://github.com/fmtlib/fmt/pull/712): + + ```c++ + #include + + std::time_t t = std::time(nullptr); + auto s = fmt::format(L"The date is {:%Y-%m-%d}.", *std::localtime(&t)); + ``` + + Thanks @DanielaE. + +- Provided more wide string overloads + (https://github.com/fmtlib/fmt/pull/724). Thanks @DanielaE. + +- Switched from a custom null-terminated string view class to + `string_view` in the format API and provided `fmt::string_view` + which implements a subset of `std::string_view` API for pre-C++17 + systems. + +- Added support for `std::experimental::string_view` + (https://github.com/fmtlib/fmt/pull/607): + + ```c++ + #include + #include + + fmt::print("{}", std::experimental::string_view("foo")); + ``` + + Thanks @virgiliofornazin. + +- Allowed mixing named and automatic arguments: + + ```c++ + fmt::format("{} {two}", 1, fmt::arg("two", 2)); + ``` + +- Removed the write API in favor of the [format + API](https://fmt.dev/latest/api.html#format-api) with compile-time + handling of format strings. + +- Disallowed formatting of multibyte strings into a wide character + target (https://github.com/fmtlib/fmt/pull/606). + +- Improved documentation + (https://github.com/fmtlib/fmt/pull/515, + https://github.com/fmtlib/fmt/issues/614, + https://github.com/fmtlib/fmt/pull/617, + https://github.com/fmtlib/fmt/pull/661, + https://github.com/fmtlib/fmt/pull/680). + Thanks @ibell, @mihaitodor and @johnthagen. + +- Implemented more efficient handling of large number of format + arguments. + +- Introduced an inline namespace for symbol versioning. + +- Added debug postfix `d` to the `fmt` library name + (https://github.com/fmtlib/fmt/issues/636). + +- Removed unnecessary `fmt/` prefix in includes + (https://github.com/fmtlib/fmt/pull/397). Thanks @chronoxor. + +- Moved `fmt/*.h` to `include/fmt/*.h` to prevent irrelevant files and + directories appearing on the include search paths when fmt is used + as a subproject and moved source files to the `src` directory. + +- Added qmake project file `support/fmt.pro` + (https://github.com/fmtlib/fmt/pull/641). Thanks @cowo78. + +- Added Gradle build file `support/build.gradle` + (https://github.com/fmtlib/fmt/pull/649). Thanks @luncliff. + +- Removed `FMT_CPPFORMAT` CMake option. + +- Fixed a name conflict with the macro `CHAR_WIDTH` in glibc + (https://github.com/fmtlib/fmt/pull/616). Thanks @aroig. + +- Fixed handling of nested braces in `fmt::join` + (https://github.com/fmtlib/fmt/issues/638). + +- Added `SOURCELINK_SUFFIX` for compatibility with Sphinx 1.5 + (https://github.com/fmtlib/fmt/pull/497). Thanks @ginggs. + +- Added a missing `inline` in the header-only mode + (https://github.com/fmtlib/fmt/pull/626). Thanks @aroig. + +- Fixed various compiler warnings + (https://github.com/fmtlib/fmt/pull/640, + https://github.com/fmtlib/fmt/pull/656, + https://github.com/fmtlib/fmt/pull/679, + https://github.com/fmtlib/fmt/pull/681, + https://github.com/fmtlib/fmt/pull/705, + https://github.com/fmtlib/fmt/issues/715, + https://github.com/fmtlib/fmt/pull/717, + https://github.com/fmtlib/fmt/pull/720, + https://github.com/fmtlib/fmt/pull/723, + https://github.com/fmtlib/fmt/pull/726, + https://github.com/fmtlib/fmt/pull/730, + https://github.com/fmtlib/fmt/pull/739). + Thanks @peterbell10, @LarsGullik, @foonathan, @eliaskosunen, + @christianparpart, @DanielaE and @mwinterb. + +- Worked around an MSVC bug and fixed several warnings + (https://github.com/fmtlib/fmt/pull/653). Thanks @alabuzhev. + +- Worked around GCC bug 67371 + (https://github.com/fmtlib/fmt/issues/682). + +- Fixed compilation with `-fno-exceptions` + (https://github.com/fmtlib/fmt/pull/655). Thanks @chenxiaolong. + +- Made `constexpr remove_prefix` gcc version check tighter + (https://github.com/fmtlib/fmt/issues/648). + +- Renamed internal type enum constants to prevent collision with + poorly written C libraries + (https://github.com/fmtlib/fmt/issues/644). + +- Added detection of `wostream operator<<` + (https://github.com/fmtlib/fmt/issues/650). + +- Fixed compilation on OpenBSD + (https://github.com/fmtlib/fmt/pull/660). Thanks @hubslave. + +- Fixed compilation on FreeBSD 12 + (https://github.com/fmtlib/fmt/pull/732). Thanks @dankm. + +- Fixed compilation when there is a mismatch between `-std` options + between the library and user code + (https://github.com/fmtlib/fmt/issues/664). + +- Fixed compilation with GCC 7 and `-std=c++11` + (https://github.com/fmtlib/fmt/issues/734). + +- Improved generated binary code on GCC 7 and older + (https://github.com/fmtlib/fmt/issues/668). + +- Fixed handling of numeric alignment with no width + (https://github.com/fmtlib/fmt/issues/675). + +- Fixed handling of empty strings in UTF8/16 converters + (https://github.com/fmtlib/fmt/pull/676). Thanks @vgalka-sl. + +- Fixed formatting of an empty `string_view` + (https://github.com/fmtlib/fmt/issues/689). + +- Fixed detection of `string_view` on libc++ + (https://github.com/fmtlib/fmt/issues/686). + +- Fixed DLL issues (https://github.com/fmtlib/fmt/pull/696). + Thanks @sebkoenig. + +- Fixed compile checks for mixing narrow and wide strings + (https://github.com/fmtlib/fmt/issues/690). + +- Disabled unsafe implicit conversion to `std::string` + (https://github.com/fmtlib/fmt/issues/729). + +- Fixed handling of reused format specs (as in `fmt::join`) for + pointers (https://github.com/fmtlib/fmt/pull/725). Thanks @mwinterb. + +- Fixed installation of `fmt/ranges.h` + (https://github.com/fmtlib/fmt/pull/738). Thanks @sv1990. + +# 4.1.0 - 2017-12-20 + +- Added `fmt::to_wstring()` in addition to `fmt::to_string()` + (https://github.com/fmtlib/fmt/pull/559). Thanks @alabuzhev. +- Added support for C++17 `std::string_view` + (https://github.com/fmtlib/fmt/pull/571 and + https://github.com/fmtlib/fmt/pull/578). + Thanks @thelostt and @mwinterb. +- Enabled stream exceptions to catch errors + (https://github.com/fmtlib/fmt/issues/581). Thanks @crusader-mike. +- Allowed formatting of class hierarchies with `fmt::format_arg()` + (https://github.com/fmtlib/fmt/pull/547). Thanks @rollbear. +- Removed limitations on character types + (https://github.com/fmtlib/fmt/pull/563). Thanks @Yelnats321. +- Conditionally enabled use of `std::allocator_traits` + (https://github.com/fmtlib/fmt/pull/583). Thanks @mwinterb. +- Added support for `const` variadic member function emulation with + `FMT_VARIADIC_CONST` + (https://github.com/fmtlib/fmt/pull/591). Thanks @ludekvodicka. +- Various bugfixes: bad overflow check, unsupported implicit type + conversion when determining formatting function, test segfaults + (https://github.com/fmtlib/fmt/issues/551), ill-formed + macros (https://github.com/fmtlib/fmt/pull/542) and + ambiguous overloads + (https://github.com/fmtlib/fmt/issues/580). Thanks @xylosper. +- Prevented warnings on MSVC + (https://github.com/fmtlib/fmt/pull/605, + https://github.com/fmtlib/fmt/pull/602, and + https://github.com/fmtlib/fmt/pull/545), clang + (https://github.com/fmtlib/fmt/pull/582), GCC + (https://github.com/fmtlib/fmt/issues/573), various + conversion warnings (https://github.com/fmtlib/fmt/pull/609, + https://github.com/fmtlib/fmt/pull/567, + https://github.com/fmtlib/fmt/pull/553 and + https://github.com/fmtlib/fmt/pull/553), and added + `override` and `[[noreturn]]` + (https://github.com/fmtlib/fmt/pull/549 and + https://github.com/fmtlib/fmt/issues/555). + Thanks @alabuzhev, @virgiliofornazin, @alexanderbock, @yumetodo, @VaderY, + @jpcima, @thelostt and @Manu343726. +- Improved CMake: Used `GNUInstallDirs` to set installation location + (https://github.com/fmtlib/fmt/pull/610) and fixed warnings + (https://github.com/fmtlib/fmt/pull/536 and + https://github.com/fmtlib/fmt/pull/556). + Thanks @mikecrowe, @evgen231 and @henryiii. + +# 4.0.0 - 2017-06-27 + +- Removed old compatibility headers `cppformat/*.h` and CMake options + (https://github.com/fmtlib/fmt/pull/527). Thanks @maddinat0r. + +- Added `string.h` containing `fmt::to_string()` as alternative to + `std::to_string()` as well as other string writer functionality + (https://github.com/fmtlib/fmt/issues/326 and + https://github.com/fmtlib/fmt/pull/441): + + ```c++ + #include "fmt/string.h" + + std::string answer = fmt::to_string(42); + ``` + + Thanks @glebov-andrey. + +- Moved `fmt::printf()` to new `printf.h` header and allowed `%s` as + generic specifier (https://github.com/fmtlib/fmt/pull/453), + made `%.f` more conformant to regular `printf()` + (https://github.com/fmtlib/fmt/pull/490), added custom + writer support (https://github.com/fmtlib/fmt/issues/476) + and implemented missing custom argument formatting + (https://github.com/fmtlib/fmt/pull/339 and + https://github.com/fmtlib/fmt/pull/340): + + ```c++ + #include "fmt/printf.h" + + // %s format specifier can be used with any argument type. + fmt::printf("%s", 42); + ``` + + Thanks @mojoBrendan, @manylegged and @spacemoose. + See also https://github.com/fmtlib/fmt/issues/360, + https://github.com/fmtlib/fmt/issues/335 and + https://github.com/fmtlib/fmt/issues/331. + +- Added `container.h` containing a `BasicContainerWriter` to write to + containers like `std::vector` + (https://github.com/fmtlib/fmt/pull/450). Thanks @polyvertex. + +- Added `fmt::join()` function that takes a range and formats its + elements separated by a given string + (https://github.com/fmtlib/fmt/pull/466): + + ```c++ + #include "fmt/format.h" + + std::vector v = {1.2, 3.4, 5.6}; + // Prints "(+01.20, +03.40, +05.60)". + fmt::print("({:+06.2f})", fmt::join(v.begin(), v.end(), ", ")); + ``` + + Thanks @olivier80. + +- Added support for custom formatting specifications to simplify + customization of built-in formatting + (https://github.com/fmtlib/fmt/pull/444). Thanks @polyvertex. + See also https://github.com/fmtlib/fmt/issues/439. + +- Added `fmt::format_system_error()` for error code formatting + (https://github.com/fmtlib/fmt/issues/323 and + https://github.com/fmtlib/fmt/pull/526). Thanks @maddinat0r. + +- Added thread-safe `fmt::localtime()` and `fmt::gmtime()` as + replacement for the standard version to `time.h` + (https://github.com/fmtlib/fmt/pull/396). Thanks @codicodi. + +- Internal improvements to `NamedArg` and `ArgLists` + (https://github.com/fmtlib/fmt/pull/389 and + https://github.com/fmtlib/fmt/pull/390). Thanks @chronoxor. + +- Fixed crash due to bug in `FormatBuf` + (https://github.com/fmtlib/fmt/pull/493). Thanks @effzeh. See also + https://github.com/fmtlib/fmt/issues/480 and + https://github.com/fmtlib/fmt/issues/491. + +- Fixed handling of wide strings in `fmt::StringWriter`. + +- Improved compiler error messages + (https://github.com/fmtlib/fmt/issues/357). + +- Fixed various warnings and issues with various compilers + (https://github.com/fmtlib/fmt/pull/494, + https://github.com/fmtlib/fmt/pull/499, + https://github.com/fmtlib/fmt/pull/483, + https://github.com/fmtlib/fmt/pull/485, + https://github.com/fmtlib/fmt/pull/482, + https://github.com/fmtlib/fmt/pull/475, + https://github.com/fmtlib/fmt/pull/473 and + https://github.com/fmtlib/fmt/pull/414). + Thanks @chronoxor, @zhaohuaxishi, @pkestene, @dschmidt and @0x414c. + +- Improved CMake: targets are now namespaced + (https://github.com/fmtlib/fmt/pull/511 and + https://github.com/fmtlib/fmt/pull/513), supported + header-only `printf.h` + (https://github.com/fmtlib/fmt/pull/354), fixed issue with + minimal supported library subset + (https://github.com/fmtlib/fmt/issues/418, + https://github.com/fmtlib/fmt/pull/419 and + https://github.com/fmtlib/fmt/pull/420). + Thanks @bjoernthiel, @niosHD, @LogicalKnight and @alabuzhev. + +- Improved documentation (https://github.com/fmtlib/fmt/pull/393). + Thanks @pwm1234. + +# 3.0.2 - 2017-06-14 + +- Added `FMT_VERSION` macro + (https://github.com/fmtlib/fmt/issues/411). +- Used `FMT_NULL` instead of literal `0` + (https://github.com/fmtlib/fmt/pull/409). Thanks @alabuzhev. +- Added extern templates for `format_float` + (https://github.com/fmtlib/fmt/issues/413). +- Fixed implicit conversion issue + (https://github.com/fmtlib/fmt/issues/507). +- Fixed signbit detection + (https://github.com/fmtlib/fmt/issues/423). +- Fixed naming collision + (https://github.com/fmtlib/fmt/issues/425). +- Fixed missing intrinsic for C++/CLI + (https://github.com/fmtlib/fmt/pull/457). Thanks @calumr. +- Fixed Android detection + (https://github.com/fmtlib/fmt/pull/458). Thanks @Gachapen. +- Use lean `windows.h` if not in header-only mode + (https://github.com/fmtlib/fmt/pull/503). Thanks @Quentin01. +- Fixed issue with CMake exporting C++11 flag + (https://github.com/fmtlib/fmt/pull/455). Thanks @EricWF. +- Fixed issue with nvcc and MSVC compiler bug and MinGW + (https://github.com/fmtlib/fmt/issues/505). +- Fixed DLL issues (https://github.com/fmtlib/fmt/pull/469 and + https://github.com/fmtlib/fmt/pull/502). + Thanks @richardeakin and @AndreasSchoenle. +- Fixed test compilation under FreeBSD + (https://github.com/fmtlib/fmt/issues/433). +- Fixed various warnings + (https://github.com/fmtlib/fmt/pull/403, + https://github.com/fmtlib/fmt/pull/410 and + https://github.com/fmtlib/fmt/pull/510). + Thanks @Lecetem, @chenhayat and @trozen. +- Worked around a broken `__builtin_clz` in clang with MS codegen + (https://github.com/fmtlib/fmt/issues/519). +- Removed redundant include + (https://github.com/fmtlib/fmt/issues/479). +- Fixed documentation issues. + +# 3.0.1 - 2016-11-01 + +- Fixed handling of thousands separator + (https://github.com/fmtlib/fmt/issues/353). +- Fixed handling of `unsigned char` strings + (https://github.com/fmtlib/fmt/issues/373). +- Corrected buffer growth when formatting time + (https://github.com/fmtlib/fmt/issues/367). +- Removed warnings under MSVC and clang + (https://github.com/fmtlib/fmt/issues/318, + https://github.com/fmtlib/fmt/issues/250, also merged + https://github.com/fmtlib/fmt/pull/385 and + https://github.com/fmtlib/fmt/pull/361). + Thanks @jcelerier and @nmoehrle. +- Fixed compilation issues under Android + (https://github.com/fmtlib/fmt/pull/327, + https://github.com/fmtlib/fmt/issues/345 and + https://github.com/fmtlib/fmt/pull/381), FreeBSD + (https://github.com/fmtlib/fmt/pull/358), Cygwin + (https://github.com/fmtlib/fmt/issues/388), MinGW + (https://github.com/fmtlib/fmt/issues/355) as well as other + issues (https://github.com/fmtlib/fmt/issues/350, + https://github.com/fmtlib/fmt/issues/355, + https://github.com/fmtlib/fmt/pull/348, + https://github.com/fmtlib/fmt/pull/402, + https://github.com/fmtlib/fmt/pull/405). + Thanks @dpantele, @hghwng, @arvedarved, @LogicalKnight and @JanHellwig. +- Fixed some documentation issues and extended specification + (https://github.com/fmtlib/fmt/issues/320, + https://github.com/fmtlib/fmt/pull/333, + https://github.com/fmtlib/fmt/issues/347, + https://github.com/fmtlib/fmt/pull/362). Thanks @smellman. + +# 3.0.0 - 2016-05-07 + +- The project has been renamed from C++ Format (cppformat) to fmt for + consistency with the used namespace and macro prefix + (https://github.com/fmtlib/fmt/issues/307). Library headers + are now located in the `fmt` directory: + + ```c++ + #include "fmt/format.h" + ``` + + Including `format.h` from the `cppformat` directory is deprecated + but works via a proxy header which will be removed in the next major + version. + + The documentation is now available at . + +- Added support for + [strftime](http://en.cppreference.com/w/cpp/chrono/c/strftime)-like + [date and time + formatting](https://fmt.dev/3.0.0/api.html#date-and-time-formatting) + (https://github.com/fmtlib/fmt/issues/283): + + ```c++ + #include "fmt/time.h" + + std::time_t t = std::time(nullptr); + // Prints "The date is 2016-04-29." (with the current date) + fmt::print("The date is {:%Y-%m-%d}.", *std::localtime(&t)); + ``` + +- `std::ostream` support including formatting of user-defined types + that provide overloaded `operator<<` has been moved to + `fmt/ostream.h`: + + ```c++ + #include "fmt/ostream.h" + + class Date { + int year_, month_, day_; + public: + Date(int year, int month, int day) : year_(year), month_(month), day_(day) {} + + friend std::ostream &operator<<(std::ostream &os, const Date &d) { + return os << d.year_ << '-' << d.month_ << '-' << d.day_; + } + }; + + std::string s = fmt::format("The date is {}", Date(2012, 12, 9)); + // s == "The date is 2012-12-9" + ``` + +- Added support for [custom argument + formatters](https://fmt.dev/3.0.0/api.html#argument-formatters) + (https://github.com/fmtlib/fmt/issues/235). + +- Added support for locale-specific integer formatting with the `n` + specifier (https://github.com/fmtlib/fmt/issues/305): + + ```c++ + std::setlocale(LC_ALL, "en_US.utf8"); + fmt::print("cppformat: {:n}\n", 1234567); // prints 1,234,567 + ``` + +- Sign is now preserved when formatting an integer with an incorrect + `printf` format specifier + (https://github.com/fmtlib/fmt/issues/265): + + ```c++ + fmt::printf("%lld", -42); // prints -42 + ``` + + Note that it would be an undefined behavior in `std::printf`. + +- Length modifiers such as `ll` are now optional in printf formatting + functions and the correct type is determined automatically + (https://github.com/fmtlib/fmt/issues/255): + + ```c++ + fmt::printf("%d", std::numeric_limits::max()); + ``` + + Note that it would be an undefined behavior in `std::printf`. + +- Added initial support for custom formatters + (https://github.com/fmtlib/fmt/issues/231). + +- Fixed detection of user-defined literal support on Intel C++ + compiler (https://github.com/fmtlib/fmt/issues/311, + https://github.com/fmtlib/fmt/pull/312). + Thanks @dean0x7d and @speth. + +- Reduced compile time + (https://github.com/fmtlib/fmt/pull/243, + https://github.com/fmtlib/fmt/pull/249, + https://github.com/fmtlib/fmt/issues/317): + + ![](https://cloud.githubusercontent.com/assets/4831417/11614060/b9e826d2-9c36-11e5-8666-d4131bf503ef.png) + + ![](https://cloud.githubusercontent.com/assets/4831417/11614080/6ac903cc-9c37-11e5-8165-26df6efae364.png) + + Thanks @dean0x7d. + +- Compile test fixes (https://github.com/fmtlib/fmt/pull/313). + Thanks @dean0x7d. + +- Documentation fixes (https://github.com/fmtlib/fmt/pull/239, + https://github.com/fmtlib/fmt/issues/248, + https://github.com/fmtlib/fmt/issues/252, + https://github.com/fmtlib/fmt/pull/258, + https://github.com/fmtlib/fmt/issues/260, + https://github.com/fmtlib/fmt/issues/301, + https://github.com/fmtlib/fmt/pull/309). + Thanks @ReadmeCritic @Gachapen and @jwilk. + +- Fixed compiler and sanitizer warnings + (https://github.com/fmtlib/fmt/issues/244, + https://github.com/fmtlib/fmt/pull/256, + https://github.com/fmtlib/fmt/pull/259, + https://github.com/fmtlib/fmt/issues/263, + https://github.com/fmtlib/fmt/issues/274, + https://github.com/fmtlib/fmt/pull/277, + https://github.com/fmtlib/fmt/pull/286, + https://github.com/fmtlib/fmt/issues/291, + https://github.com/fmtlib/fmt/issues/296, + https://github.com/fmtlib/fmt/issues/308). + Thanks @mwinterb, @pweiskircher and @Naios. + +- Improved compatibility with Windows Store apps + (https://github.com/fmtlib/fmt/issues/280, + https://github.com/fmtlib/fmt/pull/285) Thanks @mwinterb. + +- Added tests of compatibility with older C++ standards + (https://github.com/fmtlib/fmt/pull/273). Thanks @niosHD. + +- Fixed Android build + (https://github.com/fmtlib/fmt/pull/271). Thanks @newnon. + +- Changed `ArgMap` to be backed by a vector instead of a map. + (https://github.com/fmtlib/fmt/issues/261, + https://github.com/fmtlib/fmt/pull/262). Thanks @mwinterb. + +- Added `fprintf` overload that writes to a `std::ostream` + (https://github.com/fmtlib/fmt/pull/251). + Thanks @nickhutchinson. + +- Export symbols when building a Windows DLL + (https://github.com/fmtlib/fmt/pull/245). + Thanks @macdems. + +- Fixed compilation on Cygwin + (https://github.com/fmtlib/fmt/issues/304). + +- Implemented a workaround for a bug in Apple LLVM version 4.2 of + clang (https://github.com/fmtlib/fmt/issues/276). + +- Implemented a workaround for Google Test bug + https://github.com/google/googletest/issues/705 on gcc 6 + (https://github.com/fmtlib/fmt/issues/268). Thanks @octoploid. + +- Removed Biicode support because the latter has been discontinued. + +# 2.1.1 - 2016-04-11 + +- The install location for generated CMake files is now configurable + via the `FMT_CMAKE_DIR` CMake variable + (https://github.com/fmtlib/fmt/pull/299). Thanks @niosHD. +- Documentation fixes + (https://github.com/fmtlib/fmt/issues/252). + +# 2.1.0 - 2016-03-21 + +- Project layout and build system improvements + (https://github.com/fmtlib/fmt/pull/267): + + - The code have been moved to the `cppformat` directory. Including + `format.h` from the top-level directory is deprecated but works + via a proxy header which will be removed in the next major + version. + - C++ Format CMake targets now have proper interface definitions. + - Installed version of the library now supports the header-only + configuration. + - Targets `doc`, `install`, and `test` are now disabled if C++ + Format is included as a CMake subproject. They can be enabled by + setting `FMT_DOC`, `FMT_INSTALL`, and `FMT_TEST` in the parent + project. + + Thanks @niosHD. + +# 2.0.1 - 2016-03-13 + +- Improved CMake find and package support + (https://github.com/fmtlib/fmt/issues/264). Thanks @niosHD. +- Fix compile error with Android NDK and mingw32 + (https://github.com/fmtlib/fmt/issues/241). Thanks @Gachapen. +- Documentation fixes + (https://github.com/fmtlib/fmt/issues/248, + https://github.com/fmtlib/fmt/issues/260). + +# 2.0.0 - 2015-12-01 + +## General + +- \[Breaking\] Named arguments + (https://github.com/fmtlib/fmt/pull/169, + https://github.com/fmtlib/fmt/pull/173, + https://github.com/fmtlib/fmt/pull/174): + + ```c++ + fmt::print("The answer is {answer}.", fmt::arg("answer", 42)); + ``` + + Thanks @jamboree. + +- \[Experimental\] User-defined literals for format and named + arguments (https://github.com/fmtlib/fmt/pull/204, + https://github.com/fmtlib/fmt/pull/206, + https://github.com/fmtlib/fmt/pull/207): + + ```c++ + using namespace fmt::literals; + fmt::print("The answer is {answer}.", "answer"_a=42); + ``` + + Thanks @dean0x7d. + +- \[Breaking\] Formatting of more than 16 arguments is now supported + when using variadic templates + (https://github.com/fmtlib/fmt/issues/141). Thanks @Shauren. + +- Runtime width specification + (https://github.com/fmtlib/fmt/pull/168): + + ```c++ + fmt::format("{0:{1}}", 42, 5); // gives " 42" + ``` + + Thanks @jamboree. + +- \[Breaking\] Enums are now formatted with an overloaded + `std::ostream` insertion operator (`operator<<`) if available + (https://github.com/fmtlib/fmt/issues/232). + +- \[Breaking\] Changed default `bool` format to textual, \"true\" or + \"false\" (https://github.com/fmtlib/fmt/issues/170): + + ```c++ + fmt::print("{}", true); // prints "true" + ``` + + To print `bool` as a number use numeric format specifier such as + `d`: + + ```c++ + fmt::print("{:d}", true); // prints "1" + ``` + +- `fmt::printf` and `fmt::sprintf` now support formatting of `bool` + with the `%s` specifier giving textual output, \"true\" or \"false\" + (https://github.com/fmtlib/fmt/pull/223): + + ```c++ + fmt::printf("%s", true); // prints "true" + ``` + + Thanks @LarsGullik. + +- \[Breaking\] `signed char` and `unsigned char` are now formatted as + integers by default + (https://github.com/fmtlib/fmt/pull/217). + +- \[Breaking\] Pointers to C strings can now be formatted with the `p` + specifier (https://github.com/fmtlib/fmt/pull/223): + + ```c++ + fmt::print("{:p}", "test"); // prints pointer value + ``` + + Thanks @LarsGullik. + +- \[Breaking\] `fmt::printf` and `fmt::sprintf` now print null + pointers as `(nil)` and null strings as `(null)` for consistency + with glibc (https://github.com/fmtlib/fmt/pull/226). + Thanks @LarsGullik. + +- \[Breaking\] `fmt::(s)printf` now supports formatting of objects of + user-defined types that provide an overloaded `std::ostream` + insertion operator (`operator<<`) + (https://github.com/fmtlib/fmt/issues/201): + + ```c++ + fmt::printf("The date is %s", Date(2012, 12, 9)); + ``` + +- \[Breaking\] The `Buffer` template is now part of the public API and + can be used to implement custom memory buffers + (https://github.com/fmtlib/fmt/issues/140). Thanks @polyvertex. + +- \[Breaking\] Improved compatibility between `BasicStringRef` and + [std::experimental::basic_string_view]( + http://en.cppreference.com/w/cpp/experimental/basic_string_view) + (https://github.com/fmtlib/fmt/issues/100, + https://github.com/fmtlib/fmt/issues/159, + https://github.com/fmtlib/fmt/issues/183): + + - Comparison operators now compare string content, not pointers + - `BasicStringRef::c_str` replaced by `BasicStringRef::data` + - `BasicStringRef` is no longer assumed to be null-terminated + + References to null-terminated strings are now represented by a new + class, `BasicCStringRef`. + +- Dependency on pthreads introduced by Google Test is now optional + (https://github.com/fmtlib/fmt/issues/185). + +- New CMake options `FMT_DOC`, `FMT_INSTALL` and `FMT_TEST` to control + generation of `doc`, `install` and `test` targets respectively, on + by default (https://github.com/fmtlib/fmt/issues/197, + https://github.com/fmtlib/fmt/issues/198, + https://github.com/fmtlib/fmt/issues/200). Thanks @maddinat0r. + +- `noexcept` is now used when compiling with MSVC2015 + (https://github.com/fmtlib/fmt/pull/215). Thanks @dmkrepo. + +- Added an option to disable use of `windows.h` when + `FMT_USE_WINDOWS_H` is defined as 0 before including `format.h` + (https://github.com/fmtlib/fmt/issues/171). Thanks @alfps. + +- \[Breaking\] `windows.h` is now included with `NOMINMAX` unless + `FMT_WIN_MINMAX` is defined. This is done to prevent breaking code + using `std::min` and `std::max` and only affects the header-only + configuration (https://github.com/fmtlib/fmt/issues/152, + https://github.com/fmtlib/fmt/pull/153, + https://github.com/fmtlib/fmt/pull/154). Thanks @DevO2012. + +- Improved support for custom character types + (https://github.com/fmtlib/fmt/issues/171). Thanks @alfps. + +- Added an option to disable use of IOStreams when `FMT_USE_IOSTREAMS` + is defined as 0 before including `format.h` + (https://github.com/fmtlib/fmt/issues/205, + https://github.com/fmtlib/fmt/pull/208). Thanks @JodiTheTigger. + +- Improved detection of `isnan`, `isinf` and `signbit`. + +## Optimization + +- Made formatting of user-defined types more efficient with a custom + stream buffer (https://github.com/fmtlib/fmt/issues/92, + https://github.com/fmtlib/fmt/pull/230). Thanks @NotImplemented. +- Further improved performance of `fmt::Writer` on integer formatting + and fixed a minor regression. Now it is \~7% faster than + `karma::generate` on Karma\'s benchmark + (https://github.com/fmtlib/fmt/issues/186). +- \[Breaking\] Reduced [compiled code + size](https://github.com/fmtlib/fmt#compile-time-and-code-bloat) + (https://github.com/fmtlib/fmt/issues/143, + https://github.com/fmtlib/fmt/pull/149). + +## Distribution + +- \[Breaking\] Headers are now installed in + `${CMAKE_INSTALL_PREFIX}/include/cppformat` + (https://github.com/fmtlib/fmt/issues/178). Thanks @jackyf. + +- \[Breaking\] Changed the library name from `format` to `cppformat` + for consistency with the project name and to avoid potential + conflicts (https://github.com/fmtlib/fmt/issues/178). + Thanks @jackyf. + +- C++ Format is now available in [Debian](https://www.debian.org/) + GNU/Linux + ([stretch](https://packages.debian.org/source/stretch/cppformat), + [sid](https://packages.debian.org/source/sid/cppformat)) and derived + distributions such as + [Ubuntu](https://launchpad.net/ubuntu/+source/cppformat) 15.10 and + later (https://github.com/fmtlib/fmt/issues/155): + + $ sudo apt-get install libcppformat1-dev + + Thanks @jackyf. + +- [Packages for Fedora and + RHEL](https://admin.fedoraproject.org/pkgdb/package/cppformat/) are + now available. Thanks Dave Johansen. + +- C++ Format can now be installed via [Homebrew](http://brew.sh/) on + OS X (https://github.com/fmtlib/fmt/issues/157): + + $ brew install cppformat + + Thanks @ortho and Anatoliy Bulukin. + +## Documentation + +- Migrated from ReadTheDocs to GitHub Pages for better responsiveness + and reliability (https://github.com/fmtlib/fmt/issues/128). + New documentation address is . +- Added [Building thedocumentation]( + https://fmt.dev/2.0.0/usage.html#building-the-documentation) + section to the documentation. +- Documentation build script is now compatible with Python 3 and newer + pip versions. (https://github.com/fmtlib/fmt/pull/189, + https://github.com/fmtlib/fmt/issues/209). + Thanks @JodiTheTigger and @xentec. +- Documentation fixes and improvements + (https://github.com/fmtlib/fmt/issues/36, + https://github.com/fmtlib/fmt/issues/75, + https://github.com/fmtlib/fmt/issues/125, + https://github.com/fmtlib/fmt/pull/160, + https://github.com/fmtlib/fmt/pull/161, + https://github.com/fmtlib/fmt/issues/162, + https://github.com/fmtlib/fmt/issues/165, + https://github.com/fmtlib/fmt/issues/210). + Thanks @syohex. +- Fixed out-of-tree documentation build + (https://github.com/fmtlib/fmt/issues/177). Thanks @jackyf. + +## Fixes + +- Fixed `initializer_list` detection + (https://github.com/fmtlib/fmt/issues/136). Thanks @Gachapen. + +- \[Breaking\] Fixed formatting of enums with numeric format + specifiers in `fmt::(s)printf` + (https://github.com/fmtlib/fmt/issues/131, + https://github.com/fmtlib/fmt/issues/139): + + ```c++ + enum { ANSWER = 42 }; + fmt::printf("%d", ANSWER); + ``` + + Thanks @Naios. + +- Improved compatibility with old versions of MinGW + (https://github.com/fmtlib/fmt/issues/129, + https://github.com/fmtlib/fmt/pull/130, + https://github.com/fmtlib/fmt/issues/132). Thanks @cstamford. + +- Fixed a compile error on MSVC with disabled exceptions + (https://github.com/fmtlib/fmt/issues/144). + +- Added a workaround for broken implementation of variadic templates + in MSVC2012 (https://github.com/fmtlib/fmt/issues/148). + +- Placed the anonymous namespace within `fmt` namespace for the + header-only configuration (https://github.com/fmtlib/fmt/issues/171). + Thanks @alfps. + +- Fixed issues reported by Coverity Scan + (https://github.com/fmtlib/fmt/issues/187, + https://github.com/fmtlib/fmt/issues/192). + +- Implemented a workaround for a name lookup bug in MSVC2010 + (https://github.com/fmtlib/fmt/issues/188). + +- Fixed compiler warnings + (https://github.com/fmtlib/fmt/issues/95, + https://github.com/fmtlib/fmt/issues/96, + https://github.com/fmtlib/fmt/pull/114, + https://github.com/fmtlib/fmt/issues/135, + https://github.com/fmtlib/fmt/issues/142, + https://github.com/fmtlib/fmt/issues/145, + https://github.com/fmtlib/fmt/issues/146, + https://github.com/fmtlib/fmt/issues/158, + https://github.com/fmtlib/fmt/issues/163, + https://github.com/fmtlib/fmt/issues/175, + https://github.com/fmtlib/fmt/issues/190, + https://github.com/fmtlib/fmt/pull/191, + https://github.com/fmtlib/fmt/issues/194, + https://github.com/fmtlib/fmt/pull/196, + https://github.com/fmtlib/fmt/issues/216, + https://github.com/fmtlib/fmt/pull/218, + https://github.com/fmtlib/fmt/pull/220, + https://github.com/fmtlib/fmt/pull/229, + https://github.com/fmtlib/fmt/issues/233, + https://github.com/fmtlib/fmt/issues/234, + https://github.com/fmtlib/fmt/pull/236, + https://github.com/fmtlib/fmt/issues/281, + https://github.com/fmtlib/fmt/issues/289). + Thanks @seanmiddleditch, @dixlorenz, @CarterLi, @Naios, @fmatthew5876, + @LevskiWeng, @rpopescu, @gabime, @cubicool, @jkflying, @LogicalKnight, + @inguin and @Jopie64. + +- Fixed portability issues (mostly causing test failures) on ARM, + ppc64, ppc64le, s390x and SunOS 5.11 i386 + (https://github.com/fmtlib/fmt/issues/138, + https://github.com/fmtlib/fmt/issues/179, + https://github.com/fmtlib/fmt/issues/180, + https://github.com/fmtlib/fmt/issues/202, + https://github.com/fmtlib/fmt/issues/225, [Red Hat Bugzilla + Bug 1260297](https://bugzilla.redhat.com/show_bug.cgi?id=1260297)). + Thanks @Naios, @jackyf and Dave Johansen. + +- Fixed a name conflict with macro `free` defined in `crtdbg.h` when + `_CRTDBG_MAP_ALLOC` is set (https://github.com/fmtlib/fmt/issues/211). + +- Fixed shared library build on OS X + (https://github.com/fmtlib/fmt/pull/212). Thanks @dean0x7d. + +- Fixed an overload conflict on MSVC when `/Zc:wchar_t-` option is + specified (https://github.com/fmtlib/fmt/pull/214). + Thanks @slavanap. + +- Improved compatibility with MSVC 2008 + (https://github.com/fmtlib/fmt/pull/236). Thanks @Jopie64. + +- Improved compatibility with bcc32 + (https://github.com/fmtlib/fmt/issues/227). + +- Fixed `static_assert` detection on Clang + (https://github.com/fmtlib/fmt/pull/228). Thanks @dean0x7d. + +# 1.1.0 - 2015-03-06 + +- Added `BasicArrayWriter`, a class template that provides operations + for formatting and writing data into a fixed-size array + (https://github.com/fmtlib/fmt/issues/105 and + https://github.com/fmtlib/fmt/issues/122): + + ```c++ + char buffer[100]; + fmt::ArrayWriter w(buffer); + w.write("The answer is {}", 42); + ``` + +- Added [0 A.D.](http://play0ad.com/) and [PenUltima Online + (POL)](http://www.polserver.com/) to the list of notable projects + using C++ Format. + +- C++ Format now uses MSVC intrinsics for better formatting performance + (https://github.com/fmtlib/fmt/pull/115, + https://github.com/fmtlib/fmt/pull/116, + https://github.com/fmtlib/fmt/pull/118 and + https://github.com/fmtlib/fmt/pull/121). Previously these + optimizations where only used on GCC and Clang. + Thanks @CarterLi and @objectx. + +- CMake install target + (https://github.com/fmtlib/fmt/pull/119). Thanks @TrentHouliston. + + You can now install C++ Format with `make install` command. + +- Improved [Biicode](http://www.biicode.com/) support + (https://github.com/fmtlib/fmt/pull/98 and + https://github.com/fmtlib/fmt/pull/104). + Thanks @MariadeAnton and @franramirez688. + +- Improved support for building with [Android NDK]( + https://developer.android.com/tools/sdk/ndk/index.html) + (https://github.com/fmtlib/fmt/pull/107). Thanks @newnon. + + The [android-ndk-example](https://github.com/fmtlib/android-ndk-example) + repository provides and example of using C++ Format with Android NDK: + + ![](https://raw.githubusercontent.com/fmtlib/android-ndk-example/master/screenshot.png) + +- Improved documentation of `SystemError` and `WindowsError` + (https://github.com/fmtlib/fmt/issues/54). + +- Various code improvements + (https://github.com/fmtlib/fmt/pull/110, + https://github.com/fmtlib/fmt/pull/111 + https://github.com/fmtlib/fmt/pull/112). Thanks @CarterLi. + +- Improved compile-time errors when formatting wide into narrow + strings (https://github.com/fmtlib/fmt/issues/117). + +- Fixed `BasicWriter::write` without formatting arguments when C++11 + support is disabled + (https://github.com/fmtlib/fmt/issues/109). + +- Fixed header-only build on OS X with GCC 4.9 + (https://github.com/fmtlib/fmt/issues/124). + +- Fixed packaging issues (https://github.com/fmtlib/fmt/issues/94). + +- Added [changelog](https://github.com/fmtlib/fmt/blob/master/ChangeLog.md) + (https://github.com/fmtlib/fmt/issues/103). + +# 1.0.0 - 2015-02-05 + +- Add support for a header-only configuration when `FMT_HEADER_ONLY` + is defined before including `format.h`: + + ```c++ + #define FMT_HEADER_ONLY + #include "format.h" + ``` + +- Compute string length in the constructor of `BasicStringRef` instead + of the `size` method + (https://github.com/fmtlib/fmt/issues/79). This eliminates + size computation for string literals on reasonable optimizing + compilers. + +- Fix formatting of types with overloaded `operator <<` for + `std::wostream` (https://github.com/fmtlib/fmt/issues/86): + + ```c++ + fmt::format(L"The date is {0}", Date(2012, 12, 9)); + ``` + +- Fix linkage of tests on Arch Linux + (https://github.com/fmtlib/fmt/issues/89). + +- Allow precision specifier for non-float arguments + (https://github.com/fmtlib/fmt/issues/90): + + ```c++ + fmt::print("{:.3}\n", "Carpet"); // prints "Car" + ``` + +- Fix build on Android NDK (https://github.com/fmtlib/fmt/issues/93). + +- Improvements to documentation build procedure. + +- Remove `FMT_SHARED` CMake variable in favor of standard [BUILD_SHARED_LIBS]( + http://www.cmake.org/cmake/help/v3.0/variable/BUILD_SHARED_LIBS.html). + +- Fix error handling in `fmt::fprintf`. + +- Fix a number of warnings. + +# 0.12.0 - 2014-10-25 + +- \[Breaking\] Improved separation between formatting and buffer + management. `Writer` is now a base class that cannot be instantiated + directly. The new `MemoryWriter` class implements the default buffer + management with small allocations done on stack. So `fmt::Writer` + should be replaced with `fmt::MemoryWriter` in variable + declarations. + + Old code: + + ```c++ + fmt::Writer w; + ``` + + New code: + + ```c++ + fmt::MemoryWriter w; + ``` + + If you pass `fmt::Writer` by reference, you can continue to do so: + + ```c++ + void f(fmt::Writer &w); + ``` + + This doesn\'t affect the formatting API. + +- Support for custom memory allocators + (https://github.com/fmtlib/fmt/issues/69) + +- Formatting functions now accept [signed char]{.title-ref} and + [unsigned char]{.title-ref} strings as arguments + (https://github.com/fmtlib/fmt/issues/73): + + ```c++ + auto s = format("GLSL version: {}", glGetString(GL_VERSION)); + ``` + +- Reduced code bloat. According to the new [benchmark + results](https://github.com/fmtlib/fmt#compile-time-and-code-bloat), + cppformat is close to `printf` and by the order of magnitude better + than Boost Format in terms of compiled code size. + +- Improved appearance of the documentation on mobile by using the + [Sphinx Bootstrap + theme](http://ryan-roemer.github.io/sphinx-bootstrap-theme/): + + | Old | New | + | --- | --- | + | ![](https://cloud.githubusercontent.com/assets/576385/4792130/cd256436-5de3-11e4-9a62-c077d0c2b003.png) | ![](https://cloud.githubusercontent.com/assets/576385/4792131/cd29896c-5de3-11e4-8f59-cac952942bf0.png) | + +# 0.11.0 - 2014-08-21 + +- Safe printf implementation with a POSIX extension for positional + arguments: + + ```c++ + fmt::printf("Elapsed time: %.2f seconds", 1.23); + fmt::printf("%1$s, %3$d %2$s", weekday, month, day); + ``` + +- Arguments of `char` type can now be formatted as integers (Issue + https://github.com/fmtlib/fmt/issues/55): + + ```c++ + fmt::format("0x{0:02X}", 'a'); + ``` + +- Deprecated parts of the API removed. + +- The library is now built and tested on MinGW with Appveyor in + addition to existing test platforms Linux/GCC, OS X/Clang, + Windows/MSVC. + +# 0.10.0 - 2014-07-01 + +**Improved API** + +- All formatting methods are now implemented as variadic functions + instead of using `operator<<` for feeding arbitrary arguments into a + temporary formatter object. This works both with C++11 where + variadic templates are used and with older standards where variadic + functions are emulated by providing lightweight wrapper functions + defined with the `FMT_VARIADIC` macro. You can use this macro for + defining your own portable variadic functions: + + ```c++ + void report_error(const char *format, const fmt::ArgList &args) { + fmt::print("Error: {}"); + fmt::print(format, args); + } + FMT_VARIADIC(void, report_error, const char *) + + report_error("file not found: {}", path); + ``` + + Apart from a more natural syntax, this also improves performance as + there is no need to construct temporary formatter objects and + control arguments\' lifetimes. Because the wrapper functions are + very lightweight, this doesn\'t cause code bloat even in pre-C++11 + mode. + +- Simplified common case of formatting an `std::string`. Now it + requires a single function call: + + ```c++ + std::string s = format("The answer is {}.", 42); + ``` + + Previously it required 2 function calls: + + ```c++ + std::string s = str(Format("The answer is {}.") << 42); + ``` + + Instead of unsafe `c_str` function, `fmt::Writer` should be used + directly to bypass creation of `std::string`: + + ```c++ + fmt::Writer w; + w.write("The answer is {}.", 42); + w.c_str(); // returns a C string + ``` + + This doesn\'t do dynamic memory allocation for small strings and is + less error prone as the lifetime of the string is the same as for + `std::string::c_str` which is well understood (hopefully). + +- Improved consistency in naming functions that are a part of the + public API. Now all public functions are lowercase following the + standard library conventions. Previously it was a combination of + lowercase and CapitalizedWords. Issue + https://github.com/fmtlib/fmt/issues/50. + +- Old functions are marked as deprecated and will be removed in the + next release. + +**Other Changes** + +- Experimental support for printf format specifications (work in + progress): + + ```c++ + fmt::printf("The answer is %d.", 42); + std::string s = fmt::sprintf("Look, a %s!", "string"); + ``` + +- Support for hexadecimal floating point format specifiers `a` and + `A`: + + ```c++ + print("{:a}", -42.0); // Prints -0x1.5p+5 + print("{:A}", -42.0); // Prints -0X1.5P+5 + ``` + +- CMake option `FMT_SHARED` that specifies whether to build format as + a shared library (off by default). + +# 0.9.0 - 2014-05-13 + +- More efficient implementation of variadic formatting functions. + +- `Writer::Format` now has a variadic overload: + + ```c++ + Writer out; + out.Format("Look, I'm {}!", "variadic"); + ``` + +- For efficiency and consistency with other overloads, variadic + overload of the `Format` function now returns `Writer` instead of + `std::string`. Use the `str` function to convert it to + `std::string`: + + ```c++ + std::string s = str(Format("Look, I'm {}!", "variadic")); + ``` + +- Replaced formatter actions with output sinks: `NoAction` -\> + `NullSink`, `Write` -\> `FileSink`, `ColorWriter` -\> + `ANSITerminalSink`. This improves naming consistency and shouldn\'t + affect client code unless these classes are used directly which + should be rarely needed. + +- Added `ThrowSystemError` function that formats a message and throws + `SystemError` containing the formatted message and system-specific + error description. For example, the following code + + ```c++ + FILE *f = fopen(filename, "r"); + if (!f) + ThrowSystemError(errno, "Failed to open file '{}'") << filename; + ``` + + will throw `SystemError` exception with description \"Failed to open + file \'\\': No such file or directory\" if file doesn\'t + exist. + +- Support for AppVeyor continuous integration platform. + +- `Format` now throws `SystemError` in case of I/O errors. + +- Improve test infrastructure. Print functions are now tested by + redirecting the output to a pipe. + +# 0.8.0 - 2014-04-14 + +- Initial release diff --git a/c/vendor/fmt/LICENSE b/c/vendor/fmt/LICENSE new file mode 100644 index 0000000000..1cd1ef9269 --- /dev/null +++ b/c/vendor/fmt/LICENSE @@ -0,0 +1,27 @@ +Copyright (c) 2012 - present, Victor Zverovich and {fmt} contributors + +Permission is hereby granted, free of charge, to any person obtaining +a copy of this software and associated documentation files (the +"Software"), to deal in the Software without restriction, including +without limitation the rights to use, copy, modify, merge, publish, +distribute, sublicense, and/or sell copies of the Software, and to +permit persons to whom the Software is furnished to do so, subject to +the following conditions: + +The above copyright notice and this permission notice shall be +included in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE +LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION +OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION +WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + +--- Optional exception to the license --- + +As an exception, if, as a result of your compiling your source code, portions +of this Software are embedded into a machine-executable object form of such +source code, you may redistribute such embedded portions in such object form +without including the above copyright and permission notices. diff --git a/c/vendor/fmt/README.md b/c/vendor/fmt/README.md new file mode 100644 index 0000000000..dcfb16ec22 --- /dev/null +++ b/c/vendor/fmt/README.md @@ -0,0 +1,490 @@ +{fmt} + +[![image](https://github.com/fmtlib/fmt/workflows/linux/badge.svg)](https://github.com/fmtlib/fmt/actions?query=workflow%3Alinux) +[![image](https://github.com/fmtlib/fmt/workflows/macos/badge.svg)](https://github.com/fmtlib/fmt/actions?query=workflow%3Amacos) +[![image](https://github.com/fmtlib/fmt/workflows/windows/badge.svg)](https://github.com/fmtlib/fmt/actions?query=workflow%3Awindows) +[![fmt is continuously fuzzed at oss-fuzz](https://oss-fuzz-build-logs.storage.googleapis.com/badges/fmt.svg)](https://bugs.chromium.org/p/oss-fuzz/issues/list?\%0Acolspec=ID%20Type%20Component%20Status%20Proj%20Reported%20Owner%20\%0ASummary&q=proj%3Dfmt&can=1) +[![Ask questions at StackOverflow with the tag fmt](https://img.shields.io/badge/stackoverflow-fmt-blue.svg)](https://stackoverflow.com/questions/tagged/fmt) +[![image](https://api.securityscorecards.dev/projects/github.com/fmtlib/fmt/badge)](https://securityscorecards.dev/viewer/?uri=github.com/fmtlib/fmt) + +**{fmt}** is an open-source formatting library providing a fast and safe +alternative to C stdio and C++ iostreams. + +If you like this project, please consider donating to one of the funds +that help victims of the war in Ukraine: . + +[Documentation](https://fmt.dev) + +[Cheat Sheets](https://hackingcpp.com/cpp/libs/fmt.html) + +Q&A: ask questions on [StackOverflow with the tag +fmt](https://stackoverflow.com/questions/tagged/fmt). + +Try {fmt} in [Compiler Explorer](https://godbolt.org/z/Eq5763). + +# Features + +- Simple [format API](https://fmt.dev/latest/api.html) with positional + arguments for localization +- Implementation of [C++20 + std::format](https://en.cppreference.com/w/cpp/utility/format) and + [C++23 std::print](https://en.cppreference.com/w/cpp/io/print) +- [Format string syntax](https://fmt.dev/latest/syntax.html) similar + to Python\'s + [format](https://docs.python.org/3/library/stdtypes.html#str.format) +- Fast IEEE 754 floating-point formatter with correct rounding, + shortness and round-trip guarantees using the + [Dragonbox](https://github.com/jk-jeon/dragonbox) algorithm +- Portable Unicode support +- Safe [printf + implementation](https://fmt.dev/latest/api.html#printf-formatting) + including the POSIX extension for positional arguments +- Extensibility: [support for user-defined + types](https://fmt.dev/latest/api.html#formatting-user-defined-types) +- High performance: faster than common standard library + implementations of `(s)printf`, iostreams, `to_string` and + `to_chars`, see [Speed tests](#speed-tests) and [Converting a + hundred million integers to strings per + second](http://www.zverovich.net/2020/06/13/fast-int-to-string-revisited.html) +- Small code size both in terms of source code with the minimum + configuration consisting of just three files, `core.h`, `format.h` + and `format-inl.h`, and compiled code; see [Compile time and code + bloat](#compile-time-and-code-bloat) +- Reliability: the library has an extensive set of + [tests](https://github.com/fmtlib/fmt/tree/master/test) and is + [continuously fuzzed](https://bugs.chromium.org/p/oss-fuzz/issues/list?colspec=ID%20Type%20Component%20Status%20Proj%20Reported%20Owner%20Summary&q=proj%3Dfmt&can=1) +- Safety: the library is fully type-safe, errors in format strings can + be reported at compile time, automatic memory management prevents + buffer overflow errors +- Ease of use: small self-contained code base, no external + dependencies, permissive MIT + [license](https://github.com/fmtlib/fmt/blob/master/LICENSE.rst) +- [Portability](https://fmt.dev/latest/index.html#portability) with + consistent output across platforms and support for older compilers +- Clean warning-free codebase even on high warning levels such as + `-Wall -Wextra -pedantic` +- Locale independence by default +- Optional header-only configuration enabled with the + `FMT_HEADER_ONLY` macro + +See the [documentation](https://fmt.dev) for more details. + +# Examples + +**Print to stdout** ([run](https://godbolt.org/z/Tevcjh)) + +``` c++ +#include + +int main() { + fmt::print("Hello, world!\n"); +} +``` + +**Format a string** ([run](https://godbolt.org/z/oK8h33)) + +``` c++ +std::string s = fmt::format("The answer is {}.", 42); +// s == "The answer is 42." +``` + +**Format a string using positional arguments** +([run](https://godbolt.org/z/Yn7Txe)) + +``` c++ +std::string s = fmt::format("I'd rather be {1} than {0}.", "right", "happy"); +// s == "I'd rather be happy than right." +``` + +**Print dates and times** ([run](https://godbolt.org/z/c31ExdY3W)) + +``` c++ +#include + +int main() { + auto now = std::chrono::system_clock::now(); + fmt::print("Date and time: {}\n", now); + fmt::print("Time: {:%H:%M}\n", now); +} +``` + +Output: + + Date and time: 2023-12-26 19:10:31.557195597 + Time: 19:10 + +**Print a container** ([run](https://godbolt.org/z/MxM1YqjE7)) + +``` c++ +#include +#include + +int main() { + std::vector v = {1, 2, 3}; + fmt::print("{}\n", v); +} +``` + +Output: + + [1, 2, 3] + +**Check a format string at compile time** + +``` c++ +std::string s = fmt::format("{:d}", "I am not a number"); +``` + +This gives a compile-time error in C++20 because `d` is an invalid +format specifier for a string. + +**Write a file from a single thread** + +``` c++ +#include + +int main() { + auto out = fmt::output_file("guide.txt"); + out.print("Don't {}", "Panic"); +} +``` + +This can be [5 to 9 times faster than +fprintf](http://www.zverovich.net/2020/08/04/optimal-file-buffer-size.html). + +**Print with colors and text styles** + +``` c++ +#include + +int main() { + fmt::print(fg(fmt::color::crimson) | fmt::emphasis::bold, + "Hello, {}!\n", "world"); + fmt::print(fg(fmt::color::floral_white) | bg(fmt::color::slate_gray) | + fmt::emphasis::underline, "Olá, {}!\n", "Mundo"); + fmt::print(fg(fmt::color::steel_blue) | fmt::emphasis::italic, + "你好{}！\n", "世界"); +} +``` + +Output on a modern terminal with Unicode support: + +![image](https://github.com/fmtlib/fmt/assets/%0A576385/2a93c904-d6fa-4aa6-b453-2618e1c327d7) + +# Benchmarks + +## Speed tests + +| Library | Method | Run Time, s | +|-------------------|---------------|-------------| +| libc | printf | 0.91 | +| libc++ | std::ostream | 2.49 | +| {fmt} 9.1 | fmt::print | 0.74 | +| Boost Format 1.80 | boost::format | 6.26 | +| Folly Format | folly::format | 1.87 | + +{fmt} is the fastest of the benchmarked methods, \~20% faster than +`printf`. + +The above results were generated by building `tinyformat_test.cpp` on +macOS 12.6.1 with `clang++ -O3 -DNDEBUG -DSPEED_TEST -DHAVE_FORMAT`, and +taking the best of three runs. In the test, the format string +`"%0.10f:%04d:%+g:%s:%p:%c:%%\n"` or equivalent is filled 2,000,000 +times with output sent to `/dev/null`; for further details refer to the +[source](https://github.com/fmtlib/format-benchmark/blob/master/src/tinyformat-test.cc). + +{fmt} is up to 20-30x faster than `std::ostringstream` and `sprintf` on +IEEE754 `float` and `double` formatting +([dtoa-benchmark](https://github.com/fmtlib/dtoa-benchmark)) and faster +than [double-conversion](https://github.com/google/double-conversion) +and [ryu](https://github.com/ulfjack/ryu): + +[![image](https://user-images.githubusercontent.com/576385/95684665-11719600-0ba8-11eb-8e5b-972ff4e49428.png)](https://fmt.dev/unknown_mac64_clang12.0.html) + +## Compile time and code bloat + +The script +[bloat-test.py](https://github.com/fmtlib/format-benchmark/blob/master/bloat-test.py) +from [format-benchmark](https://github.com/fmtlib/format-benchmark) +tests compile time and code bloat for nontrivial projects. It generates +100 translation units and uses `printf()` or its alternative five times +in each to simulate a medium-sized project. The resulting executable +size and compile time (Apple LLVM version 8.1.0 (clang-802.0.42), macOS +Sierra, best of three) is shown in the following tables. + +**Optimized build (-O3)** + +| Method | Compile Time, s | Executable size, KiB | Stripped size, KiB | +|---------------|-----------------|----------------------|--------------------| +| printf | 2.6 | 29 | 26 | +| printf+string | 16.4 | 29 | 26 | +| iostreams | 31.1 | 59 | 55 | +| {fmt} | 19.0 | 37 | 34 | +| Boost Format | 91.9 | 226 | 203 | +| Folly Format | 115.7 | 101 | 88 | + +As you can see, {fmt} has 60% less overhead in terms of resulting binary +code size compared to iostreams and comes pretty close to `printf`. +Boost Format and Folly Format have the largest overheads. + +`printf+string` is the same as `printf` but with an extra `` +include to measure the overhead of the latter. + +**Non-optimized build** + +| Method | Compile Time, s | Executable size, KiB | Stripped size, KiB | +|---------------|-----------------|----------------------|--------------------| +| printf | 2.2 | 33 | 30 | +| printf+string | 16.0 | 33 | 30 | +| iostreams | 28.3 | 56 | 52 | +| {fmt} | 18.2 | 59 | 50 | +| Boost Format | 54.1 | 365 | 303 | +| Folly Format | 79.9 | 445 | 430 | + +`libc`, `lib(std)c++`, and `libfmt` are all linked as shared libraries +to compare formatting function overhead only. Boost Format is a +header-only library so it doesn\'t provide any linkage options. + +## Running the tests + +Please refer to [Building the +library](https://fmt.dev/latest/usage.html#building-the-library) for +instructions on how to build the library and run the unit tests. + +Benchmarks reside in a separate repository, +[format-benchmarks](https://github.com/fmtlib/format-benchmark), so to +run the benchmarks you first need to clone this repository and generate +Makefiles with CMake: + + $ git clone --recursive https://github.com/fmtlib/format-benchmark.git + $ cd format-benchmark + $ cmake . + +Then you can run the speed test: + + $ make speed-test + +or the bloat test: + + $ make bloat-test + +# Migrating code + +[clang-tidy](https://clang.llvm.org/extra/clang-tidy/) v17 (not yet +released) provides the +[modernize-use-std-print](https://clang.llvm.org/extra/clang-tidy/checks/modernize/use-std-print.html) +check that is capable of converting occurrences of `printf` and +`fprintf` to `fmt::print` if configured to do so. (By default it +converts to `std::print`.) + +# Notable projects using this library + +- [0 A.D.](https://play0ad.com/): a free, open-source, cross-platform + real-time strategy game +- [AMPL/MP](https://github.com/ampl/mp): an open-source library for + mathematical programming +- [Apple's FoundationDB](https://github.com/apple/foundationdb): an open-source, + distributed, transactional key-value store +- [Aseprite](https://github.com/aseprite/aseprite): animated sprite + editor & pixel art tool +- [AvioBook](https://www.aviobook.aero/en): a comprehensive aircraft + operations suite +- [Blizzard Battle.net](https://battle.net/): an online gaming + platform +- [Celestia](https://celestia.space/): real-time 3D visualization of + space +- [Ceph](https://ceph.com/): a scalable distributed storage system +- [ccache](https://ccache.dev/): a compiler cache +- [ClickHouse](https://github.com/ClickHouse/ClickHouse): an + analytical database management system +- [Contour](https://github.com/contour-terminal/contour/): a modern + terminal emulator +- [CUAUV](https://cuauv.org/): Cornell University\'s autonomous + underwater vehicle +- [Drake](https://drake.mit.edu/): a planning, control, and analysis + toolbox for nonlinear dynamical systems (MIT) +- [Envoy](https://lyft.github.io/envoy/): C++ L7 proxy and + communication bus (Lyft) +- [FiveM](https://fivem.net/): a modification framework for GTA V +- [fmtlog](https://github.com/MengRao/fmtlog): a performant + fmtlib-style logging library with latency in nanoseconds +- [Folly](https://github.com/facebook/folly): Facebook open-source + library +- [GemRB](https://gemrb.org/): a portable open-source implementation + of Bioware's Infinity Engine +- [Grand Mountain + Adventure](https://store.steampowered.com/app/1247360/Grand_Mountain_Adventure/): + a beautiful open-world ski & snowboarding game +- [HarpyWar/pvpgn](https://github.com/pvpgn/pvpgn-server): Player vs + Player Gaming Network with tweaks +- [KBEngine](https://github.com/kbengine/kbengine): an open-source + MMOG server engine +- [Keypirinha](https://keypirinha.com/): a semantic launcher for + Windows +- [Kodi](https://kodi.tv/) (formerly xbmc): home theater software +- [Knuth](https://kth.cash/): high-performance Bitcoin full-node +- [libunicode](https://github.com/contour-terminal/libunicode/): a + modern C++17 Unicode library +- [MariaDB](https://mariadb.org/): relational database management + system +- [Microsoft Verona](https://github.com/microsoft/verona): research + programming language for concurrent ownership +- [MongoDB](https://mongodb.com/): distributed document database +- [MongoDB Smasher](https://github.com/duckie/mongo_smasher): a small + tool to generate randomized datasets +- [OpenSpace](https://openspaceproject.com/): an open-source + astrovisualization framework +- [PenUltima Online (POL)](https://www.polserver.com/): an MMO server, + compatible with most Ultima Online clients +- [PyTorch](https://github.com/pytorch/pytorch): an open-source + machine learning library +- [quasardb](https://www.quasardb.net/): a distributed, + high-performance, associative database +- [Quill](https://github.com/odygrd/quill): asynchronous low-latency + logging library +- [QKW](https://github.com/ravijanjam/qkw): generalizing aliasing to + simplify navigation, and executing complex multi-line terminal + command sequences +- [redis-cerberus](https://github.com/HunanTV/redis-cerberus): a Redis + cluster proxy +- [redpanda](https://vectorized.io/redpanda): a 10x faster Kafka® + replacement for mission-critical systems written in C++ +- [rpclib](http://rpclib.net/): a modern C++ msgpack-RPC server and + client library +- [Salesforce Analytics + Cloud](https://www.salesforce.com/analytics-cloud/overview/): + business intelligence software +- [Scylla](https://www.scylladb.com/): a Cassandra-compatible NoSQL + data store that can handle 1 million transactions per second on a + single server +- [Seastar](http://www.seastar-project.org/): an advanced, open-source + C++ framework for high-performance server applications on modern + hardware +- [spdlog](https://github.com/gabime/spdlog): super fast C++ logging + library +- [Stellar](https://www.stellar.org/): financial platform +- [Touch Surgery](https://www.touchsurgery.com/): surgery simulator +- [TrinityCore](https://github.com/TrinityCore/TrinityCore): + open-source MMORPG framework +- [🐙 userver framework](https://userver.tech/): open-source + asynchronous framework with a rich set of abstractions and database + drivers +- [Windows Terminal](https://github.com/microsoft/terminal): the new + Windows terminal + +[More\...](https://github.com/search?q=fmtlib&type=Code) + +If you are aware of other projects using this library, please let me +know by [email](mailto:victor.zverovich@gmail.com) or by submitting an +[issue](https://github.com/fmtlib/fmt/issues). + +# Motivation + +So why yet another formatting library? + +There are plenty of methods for doing this task, from standard ones like +the printf family of function and iostreams to Boost Format and +FastFormat libraries. The reason for creating a new library is that +every existing solution that I found either had serious issues or +didn\'t provide all the features I needed. + +## printf + +The good thing about `printf` is that it is pretty fast and readily +available being a part of the C standard library. The main drawback is +that it doesn\'t support user-defined types. `printf` also has safety +issues although they are somewhat mitigated with [\_\_attribute\_\_ +((format (printf, +\...))](https://gcc.gnu.org/onlinedocs/gcc/Function-Attributes.html) in +GCC. There is a POSIX extension that adds positional arguments required +for +[i18n](https://en.wikipedia.org/wiki/Internationalization_and_localization) +to `printf` but it is not a part of C99 and may not be available on some +platforms. + +## iostreams + +The main issue with iostreams is best illustrated with an example: + +``` c++ +std::cout << std::setprecision(2) << std::fixed << 1.23456 << "\n"; +``` + +which is a lot of typing compared to printf: + +``` c++ +printf("%.2f\n", 1.23456); +``` + +Matthew Wilson, the author of FastFormat, called this \"chevron hell\". +iostreams don\'t support positional arguments by design. + +The good part is that iostreams support user-defined types and are safe +although error handling is awkward. + +## Boost Format + +This is a very powerful library that supports both `printf`-like format +strings and positional arguments. Its main drawback is performance. +According to various benchmarks, it is much slower than other methods +considered here. Boost Format also has excessive build times and severe +code bloat issues (see [Benchmarks](#benchmarks)). + +## FastFormat + +This is an interesting library that is fast, safe, and has positional +arguments. However, it has significant limitations, citing its author: + +> Three features that have no hope of being accommodated within the +> current design are: +> +> - Leading zeros (or any other non-space padding) +> - Octal/hexadecimal encoding +> - Runtime width/alignment specification + +It is also quite big and has a heavy dependency, STLSoft, which might be +too restrictive for using it in some projects. + +## Boost Spirit.Karma + +This is not a formatting library but I decided to include it here for +completeness. As iostreams, it suffers from the problem of mixing +verbatim text with arguments. The library is pretty fast, but slower on +integer formatting than `fmt::format_to` with format string compilation +on Karma\'s own benchmark, see [Converting a hundred million integers to +strings per +second](http://www.zverovich.net/2020/06/13/fast-int-to-string-revisited.html). + +# License + +{fmt} is distributed under the MIT +[license](https://github.com/fmtlib/fmt/blob/master/LICENSE). + +# Documentation License + +The [Format String Syntax](https://fmt.dev/latest/syntax.html) section +in the documentation is based on the one from Python [string module +documentation](https://docs.python.org/3/library/string.html#module-string). +For this reason, the documentation is distributed under the Python +Software Foundation license available in +[doc/python-license.txt](https://raw.github.com/fmtlib/fmt/master/doc/python-license.txt). +It only applies if you distribute the documentation of {fmt}. + +# Maintainers + +The {fmt} library is maintained by Victor Zverovich +([vitaut](https://github.com/vitaut)) with contributions from many other +people. See +[Contributors](https://github.com/fmtlib/fmt/graphs/contributors) and +[Releases](https://github.com/fmtlib/fmt/releases) for some of the +names. Let us know if your contribution is not listed or mentioned +incorrectly and we\'ll make it right. + +# Security Policy + +To report a security issue, please disclose it at [security +advisory](https://github.com/fmtlib/fmt/security/advisories/new). + +This project is maintained by a team of volunteers on a +reasonable-effort basis. As such, please give us at least 90 days to +work on a fix before public exposure. diff --git a/c/vendor/fmt/include/fmt/args.h b/c/vendor/fmt/include/fmt/args.h new file mode 100644 index 0000000000..ad1654bbb6 --- /dev/null +++ b/c/vendor/fmt/include/fmt/args.h @@ -0,0 +1,235 @@ +// Formatting library for C++ - dynamic argument lists +// +// Copyright (c) 2012 - present, Victor Zverovich +// All rights reserved. +// +// For the license information refer to format.h. + +#ifndef FMT_ARGS_H_ +#define FMT_ARGS_H_ + +#include // std::reference_wrapper +#include // std::unique_ptr +#include + +#include "core.h" + +FMT_BEGIN_NAMESPACE + +namespace detail { + +template struct is_reference_wrapper : std::false_type {}; +template +struct is_reference_wrapper> : std::true_type {}; + +template auto unwrap(const T& v) -> const T& { return v; } +template +auto unwrap(const std::reference_wrapper& v) -> const T& { + return static_cast(v); +} + +class dynamic_arg_list { + // Workaround for clang's -Wweak-vtables. Unlike for regular classes, for + // templates it doesn't complain about inability to deduce single translation + // unit for placing vtable. So storage_node_base is made a fake template. + template struct node { + virtual ~node() = default; + std::unique_ptr> next; + }; + + template struct typed_node : node<> { + T value; + + template + FMT_CONSTEXPR typed_node(const Arg& arg) : value(arg) {} + + template + FMT_CONSTEXPR typed_node(const basic_string_view& arg) + : value(arg.data(), arg.size()) {} + }; + + std::unique_ptr> head_; + + public: + template auto push(const Arg& arg) -> const T& { + auto new_node = std::unique_ptr>(new typed_node(arg)); + auto& value = new_node->value; + new_node->next = std::move(head_); + head_ = std::move(new_node); + return value; + } +}; +} // namespace detail + +/** + \rst + A dynamic version of `fmt::format_arg_store`. + It's equipped with a storage to potentially temporary objects which lifetimes + could be shorter than the format arguments object. + + It can be implicitly converted into `~fmt::basic_format_args` for passing + into type-erased formatting functions such as `~fmt::vformat`. + \endrst + */ +template +class dynamic_format_arg_store +#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409 + // Workaround a GCC template argument substitution bug. + : public basic_format_args +#endif +{ + private: + using char_type = typename Context::char_type; + + template struct need_copy { + static constexpr detail::type mapped_type = + detail::mapped_type_constant::value; + + enum { + value = !(detail::is_reference_wrapper::value || + std::is_same>::value || + std::is_same>::value || + (mapped_type != detail::type::cstring_type && + mapped_type != detail::type::string_type && + mapped_type != detail::type::custom_type)) + }; + }; + + template + using stored_type = conditional_t< + std::is_convertible>::value && + !detail::is_reference_wrapper::value, + std::basic_string, T>; + + // Storage of basic_format_arg must be contiguous. + std::vector> data_; + std::vector> named_info_; + + // Storage of arguments not fitting into basic_format_arg must grow + // without relocation because items in data_ refer to it. + detail::dynamic_arg_list dynamic_args_; + + friend class basic_format_args; + + auto get_types() const -> unsigned long long { + return detail::is_unpacked_bit | data_.size() | + (named_info_.empty() + ? 0ULL + : static_cast(detail::has_named_args_bit)); + } + + auto data() const -> const basic_format_arg* { + return named_info_.empty() ? data_.data() : data_.data() + 1; + } + + template void emplace_arg(const T& arg) { + data_.emplace_back(detail::make_arg(arg)); + } + + template + void emplace_arg(const detail::named_arg& arg) { + if (named_info_.empty()) { + constexpr const detail::named_arg_info* zero_ptr{nullptr}; + data_.insert(data_.begin(), {zero_ptr, 0}); + } + data_.emplace_back(detail::make_arg(detail::unwrap(arg.value))); + auto pop_one = [](std::vector>* data) { + data->pop_back(); + }; + std::unique_ptr>, decltype(pop_one)> + guard{&data_, pop_one}; + named_info_.push_back({arg.name, static_cast(data_.size() - 2u)}); + data_[0].value_.named_args = {named_info_.data(), named_info_.size()}; + guard.release(); + } + + public: + constexpr dynamic_format_arg_store() = default; + + /** + \rst + Adds an argument into the dynamic store for later passing to a formatting + function. + + Note that custom types and string types (but not string views) are copied + into the store dynamically allocating memory if necessary. + + **Example**:: + + fmt::dynamic_format_arg_store store; + store.push_back(42); + store.push_back("abc"); + store.push_back(1.5f); + std::string result = fmt::vformat("{} and {} and {}", store); + \endrst + */ + template void push_back(const T& arg) { + if (detail::const_check(need_copy::value)) + emplace_arg(dynamic_args_.push>(arg)); + else + emplace_arg(detail::unwrap(arg)); + } + + /** + \rst + Adds a reference to the argument into the dynamic store for later passing to + a formatting function. + + **Example**:: + + fmt::dynamic_format_arg_store store; + char band[] = "Rolling Stones"; + store.push_back(std::cref(band)); + band[9] = 'c'; // Changing str affects the output. + std::string result = fmt::vformat("{}", store); + // result == "Rolling Scones" + \endrst + */ + template void push_back(std::reference_wrapper arg) { + static_assert( + need_copy::value, + "objects of built-in types and string views are always copied"); + emplace_arg(arg.get()); + } + + /** + Adds named argument into the dynamic store for later passing to a formatting + function. ``std::reference_wrapper`` is supported to avoid copying of the + argument. The name is always copied into the store. + */ + template + void push_back(const detail::named_arg& arg) { + const char_type* arg_name = + dynamic_args_.push>(arg.name).c_str(); + if (detail::const_check(need_copy::value)) { + emplace_arg( + fmt::arg(arg_name, dynamic_args_.push>(arg.value))); + } else { + emplace_arg(fmt::arg(arg_name, arg.value)); + } + } + + /** Erase all elements from the store */ + void clear() { + data_.clear(); + named_info_.clear(); + dynamic_args_ = detail::dynamic_arg_list(); + } + + /** + \rst + Reserves space to store at least *new_cap* arguments including + *new_cap_named* named arguments. + \endrst + */ + void reserve(size_t new_cap, size_t new_cap_named) { + FMT_ASSERT(new_cap >= new_cap_named, + "Set of arguments includes set of named arguments"); + data_.reserve(new_cap); + named_info_.reserve(new_cap_named); + } +}; + +FMT_END_NAMESPACE + +#endif // FMT_ARGS_H_ diff --git a/c/vendor/fmt/include/fmt/chrono.h b/c/vendor/fmt/include/fmt/chrono.h new file mode 100644 index 0000000000..9d54574e16 --- /dev/null +++ b/c/vendor/fmt/include/fmt/chrono.h @@ -0,0 +1,2240 @@ +// Formatting library for C++ - chrono support +// +// Copyright (c) 2012 - present, Victor Zverovich +// All rights reserved. +// +// For the license information refer to format.h. + +#ifndef FMT_CHRONO_H_ +#define FMT_CHRONO_H_ + +#include +#include +#include // std::isfinite +#include // std::memcpy +#include +#include +#include +#include +#include + +#include "ostream.h" // formatbuf + +FMT_BEGIN_NAMESPACE + +// Check if std::chrono::local_t is available. +#ifndef FMT_USE_LOCAL_TIME +# ifdef __cpp_lib_chrono +# define FMT_USE_LOCAL_TIME (__cpp_lib_chrono >= 201907L) +# else +# define FMT_USE_LOCAL_TIME 0 +# endif +#endif + +// Check if std::chrono::utc_timestamp is available. +#ifndef FMT_USE_UTC_TIME +# ifdef __cpp_lib_chrono +# define FMT_USE_UTC_TIME (__cpp_lib_chrono >= 201907L) +# else +# define FMT_USE_UTC_TIME 0 +# endif +#endif + +// Enable tzset. +#ifndef FMT_USE_TZSET +// UWP doesn't provide _tzset. +# if FMT_HAS_INCLUDE("winapifamily.h") +# include +# endif +# if defined(_WIN32) && (!defined(WINAPI_FAMILY) || \ + (WINAPI_FAMILY == WINAPI_FAMILY_DESKTOP_APP)) +# define FMT_USE_TZSET 1 +# else +# define FMT_USE_TZSET 0 +# endif +#endif + +// Enable safe chrono durations, unless explicitly disabled. +#ifndef FMT_SAFE_DURATION_CAST +# define FMT_SAFE_DURATION_CAST 1 +#endif +#if FMT_SAFE_DURATION_CAST + +// For conversion between std::chrono::durations without undefined +// behaviour or erroneous results. +// This is a stripped down version of duration_cast, for inclusion in fmt. +// See https://github.com/pauldreik/safe_duration_cast +// +// Copyright Paul Dreik 2019 +namespace safe_duration_cast { + +template ::value && + std::numeric_limits::is_signed == + std::numeric_limits::is_signed)> +FMT_CONSTEXPR auto lossless_integral_conversion(const From from, int& ec) + -> To { + ec = 0; + using F = std::numeric_limits; + using T = std::numeric_limits; + static_assert(F::is_integer, "From must be integral"); + static_assert(T::is_integer, "To must be integral"); + + // A and B are both signed, or both unsigned. + if (detail::const_check(F::digits <= T::digits)) { + // From fits in To without any problem. + } else { + // From does not always fit in To, resort to a dynamic check. + if (from < (T::min)() || from > (T::max)()) { + // outside range. + ec = 1; + return {}; + } + } + return static_cast(from); +} + +/** + * converts From to To, without loss. If the dynamic value of from + * can't be converted to To without loss, ec is set. + */ +template ::value && + std::numeric_limits::is_signed != + std::numeric_limits::is_signed)> +FMT_CONSTEXPR auto lossless_integral_conversion(const From from, int& ec) + -> To { + ec = 0; + using F = std::numeric_limits; + using T = std::numeric_limits; + static_assert(F::is_integer, "From must be integral"); + static_assert(T::is_integer, "To must be integral"); + + if (detail::const_check(F::is_signed && !T::is_signed)) { + // From may be negative, not allowed! + if (fmt::detail::is_negative(from)) { + ec = 1; + return {}; + } + // From is positive. Can it always fit in To? + if (detail::const_check(F::digits > T::digits) && + from > static_cast(detail::max_value())) { + ec = 1; + return {}; + } + } + + if (detail::const_check(!F::is_signed && T::is_signed && + F::digits >= T::digits) && + from > static_cast(detail::max_value())) { + ec = 1; + return {}; + } + return static_cast(from); // Lossless conversion. +} + +template ::value)> +FMT_CONSTEXPR auto lossless_integral_conversion(const From from, int& ec) + -> To { + ec = 0; + return from; +} // function + +// clang-format off +/** + * converts From to To if possible, otherwise ec is set. + * + * input | output + * ---------------------------------|--------------- + * NaN | NaN + * Inf | Inf + * normal, fits in output | converted (possibly lossy) + * normal, does not fit in output | ec is set + * subnormal | best effort + * -Inf | -Inf + */ +// clang-format on +template ::value)> +FMT_CONSTEXPR auto safe_float_conversion(const From from, int& ec) -> To { + ec = 0; + using T = std::numeric_limits; + static_assert(std::is_floating_point::value, "From must be floating"); + static_assert(std::is_floating_point::value, "To must be floating"); + + // catch the only happy case + if (std::isfinite(from)) { + if (from >= T::lowest() && from <= (T::max)()) { + return static_cast(from); + } + // not within range. + ec = 1; + return {}; + } + + // nan and inf will be preserved + return static_cast(from); +} // function + +template ::value)> +FMT_CONSTEXPR auto safe_float_conversion(const From from, int& ec) -> To { + ec = 0; + static_assert(std::is_floating_point::value, "From must be floating"); + return from; +} + +/** + * safe duration cast between integral durations + */ +template ::value), + FMT_ENABLE_IF(std::is_integral::value)> +auto safe_duration_cast(std::chrono::duration from, + int& ec) -> To { + using From = std::chrono::duration; + ec = 0; + // the basic idea is that we need to convert from count() in the from type + // to count() in the To type, by multiplying it with this: + struct Factor + : std::ratio_divide {}; + + static_assert(Factor::num > 0, "num must be positive"); + static_assert(Factor::den > 0, "den must be positive"); + + // the conversion is like this: multiply from.count() with Factor::num + // /Factor::den and convert it to To::rep, all this without + // overflow/underflow. let's start by finding a suitable type that can hold + // both To, From and Factor::num + using IntermediateRep = + typename std::common_type::type; + + // safe conversion to IntermediateRep + IntermediateRep count = + lossless_integral_conversion(from.count(), ec); + if (ec) return {}; + // multiply with Factor::num without overflow or underflow + if (detail::const_check(Factor::num != 1)) { + const auto max1 = detail::max_value() / Factor::num; + if (count > max1) { + ec = 1; + return {}; + } + const auto min1 = + (std::numeric_limits::min)() / Factor::num; + if (detail::const_check(!std::is_unsigned::value) && + count < min1) { + ec = 1; + return {}; + } + count *= Factor::num; + } + + if (detail::const_check(Factor::den != 1)) count /= Factor::den; + auto tocount = lossless_integral_conversion(count, ec); + return ec ? To() : To(tocount); +} + +/** + * safe duration_cast between floating point durations + */ +template ::value), + FMT_ENABLE_IF(std::is_floating_point::value)> +auto safe_duration_cast(std::chrono::duration from, + int& ec) -> To { + using From = std::chrono::duration; + ec = 0; + if (std::isnan(from.count())) { + // nan in, gives nan out. easy. + return To{std::numeric_limits::quiet_NaN()}; + } + // maybe we should also check if from is denormal, and decide what to do about + // it. + + // +-inf should be preserved. + if (std::isinf(from.count())) { + return To{from.count()}; + } + + // the basic idea is that we need to convert from count() in the from type + // to count() in the To type, by multiplying it with this: + struct Factor + : std::ratio_divide {}; + + static_assert(Factor::num > 0, "num must be positive"); + static_assert(Factor::den > 0, "den must be positive"); + + // the conversion is like this: multiply from.count() with Factor::num + // /Factor::den and convert it to To::rep, all this without + // overflow/underflow. let's start by finding a suitable type that can hold + // both To, From and Factor::num + using IntermediateRep = + typename std::common_type::type; + + // force conversion of From::rep -> IntermediateRep to be safe, + // even if it will never happen be narrowing in this context. + IntermediateRep count = + safe_float_conversion(from.count(), ec); + if (ec) { + return {}; + } + + // multiply with Factor::num without overflow or underflow + if (detail::const_check(Factor::num != 1)) { + constexpr auto max1 = detail::max_value() / + static_cast(Factor::num); + if (count > max1) { + ec = 1; + return {}; + } + constexpr auto min1 = std::numeric_limits::lowest() / + static_cast(Factor::num); + if (count < min1) { + ec = 1; + return {}; + } + count *= static_cast(Factor::num); + } + + // this can't go wrong, right? den>0 is checked earlier. + if (detail::const_check(Factor::den != 1)) { + using common_t = typename std::common_type::type; + count /= static_cast(Factor::den); + } + + // convert to the to type, safely + using ToRep = typename To::rep; + + const ToRep tocount = safe_float_conversion(count, ec); + if (ec) { + return {}; + } + return To{tocount}; +} +} // namespace safe_duration_cast +#endif + +// Prevents expansion of a preceding token as a function-style macro. +// Usage: f FMT_NOMACRO() +#define FMT_NOMACRO + +namespace detail { +template struct null {}; +inline auto localtime_r FMT_NOMACRO(...) -> null<> { return null<>(); } +inline auto localtime_s(...) -> null<> { return null<>(); } +inline auto gmtime_r(...) -> null<> { return null<>(); } +inline auto gmtime_s(...) -> null<> { return null<>(); } + +inline auto get_classic_locale() -> const std::locale& { + static const auto& locale = std::locale::classic(); + return locale; +} + +template struct codecvt_result { + static constexpr const size_t max_size = 32; + CodeUnit buf[max_size]; + CodeUnit* end; +}; + +template +void write_codecvt(codecvt_result& out, string_view in_buf, + const std::locale& loc) { +#if FMT_CLANG_VERSION +# pragma clang diagnostic push +# pragma clang diagnostic ignored "-Wdeprecated" + auto& f = std::use_facet>(loc); +# pragma clang diagnostic pop +#else + auto& f = std::use_facet>(loc); +#endif + auto mb = std::mbstate_t(); + const char* from_next = nullptr; + auto result = f.in(mb, in_buf.begin(), in_buf.end(), from_next, + std::begin(out.buf), std::end(out.buf), out.end); + if (result != std::codecvt_base::ok) + FMT_THROW(format_error("failed to format time")); +} + +template +auto write_encoded_tm_str(OutputIt out, string_view in, const std::locale& loc) + -> OutputIt { + if (detail::is_utf8() && loc != get_classic_locale()) { + // char16_t and char32_t codecvts are broken in MSVC (linkage errors) and + // gcc-4. +#if FMT_MSC_VERSION != 0 || \ + (defined(__GLIBCXX__) && !defined(_GLIBCXX_USE_DUAL_ABI)) + // The _GLIBCXX_USE_DUAL_ABI macro is always defined in libstdc++ from gcc-5 + // and newer. + using code_unit = wchar_t; +#else + using code_unit = char32_t; +#endif + + using unit_t = codecvt_result; + unit_t unit; + write_codecvt(unit, in, loc); + // In UTF-8 is used one to four one-byte code units. + auto u = + to_utf8>(); + if (!u.convert({unit.buf, to_unsigned(unit.end - unit.buf)})) + FMT_THROW(format_error("failed to format time")); + return copy_str(u.c_str(), u.c_str() + u.size(), out); + } + return copy_str(in.data(), in.data() + in.size(), out); +} + +template ::value)> +auto write_tm_str(OutputIt out, string_view sv, const std::locale& loc) + -> OutputIt { + codecvt_result unit; + write_codecvt(unit, sv, loc); + return copy_str(unit.buf, unit.end, out); +} + +template ::value)> +auto write_tm_str(OutputIt out, string_view sv, const std::locale& loc) + -> OutputIt { + return write_encoded_tm_str(out, sv, loc); +} + +template +inline void do_write(buffer& buf, const std::tm& time, + const std::locale& loc, char format, char modifier) { + auto&& format_buf = formatbuf>(buf); + auto&& os = std::basic_ostream(&format_buf); + os.imbue(loc); + const auto& facet = std::use_facet>(loc); + auto end = facet.put(os, os, Char(' '), &time, format, modifier); + if (end.failed()) FMT_THROW(format_error("failed to format time")); +} + +template ::value)> +auto write(OutputIt out, const std::tm& time, const std::locale& loc, + char format, char modifier = 0) -> OutputIt { + auto&& buf = get_buffer(out); + do_write(buf, time, loc, format, modifier); + return get_iterator(buf, out); +} + +template ::value)> +auto write(OutputIt out, const std::tm& time, const std::locale& loc, + char format, char modifier = 0) -> OutputIt { + auto&& buf = basic_memory_buffer(); + do_write(buf, time, loc, format, modifier); + return write_encoded_tm_str(out, string_view(buf.data(), buf.size()), loc); +} + +template +struct is_same_arithmetic_type + : public std::integral_constant::value && + std::is_integral::value) || + (std::is_floating_point::value && + std::is_floating_point::value)> { +}; + +template < + typename To, typename FromRep, typename FromPeriod, + FMT_ENABLE_IF(is_same_arithmetic_type::value)> +auto fmt_duration_cast(std::chrono::duration from) -> To { +#if FMT_SAFE_DURATION_CAST + // Throwing version of safe_duration_cast is only available for + // integer to integer or float to float casts. + int ec; + To to = safe_duration_cast::safe_duration_cast(from, ec); + if (ec) FMT_THROW(format_error("cannot format duration")); + return to; +#else + // Standard duration cast, may overflow. + return std::chrono::duration_cast(from); +#endif +} + +template < + typename To, typename FromRep, typename FromPeriod, + FMT_ENABLE_IF(!is_same_arithmetic_type::value)> +auto fmt_duration_cast(std::chrono::duration from) -> To { + // Mixed integer <-> float cast is not supported by safe_duration_cast. + return std::chrono::duration_cast(from); +} + +template +auto to_time_t( + std::chrono::time_point time_point) + -> std::time_t { + // Cannot use std::chrono::system_clock::to_time_t since this would first + // require a cast to std::chrono::system_clock::time_point, which could + // overflow. + return fmt_duration_cast>( + time_point.time_since_epoch()) + .count(); +} +} // namespace detail + +FMT_BEGIN_EXPORT + +/** + Converts given time since epoch as ``std::time_t`` value into calendar time, + expressed in local time. Unlike ``std::localtime``, this function is + thread-safe on most platforms. + */ +inline auto localtime(std::time_t time) -> std::tm { + struct dispatcher { + std::time_t time_; + std::tm tm_; + + dispatcher(std::time_t t) : time_(t) {} + + auto run() -> bool { + using namespace fmt::detail; + return handle(localtime_r(&time_, &tm_)); + } + + auto handle(std::tm* tm) -> bool { return tm != nullptr; } + + auto handle(detail::null<>) -> bool { + using namespace fmt::detail; + return fallback(localtime_s(&tm_, &time_)); + } + + auto fallback(int res) -> bool { return res == 0; } + +#if !FMT_MSC_VERSION + auto fallback(detail::null<>) -> bool { + using namespace fmt::detail; + std::tm* tm = std::localtime(&time_); + if (tm) tm_ = *tm; + return tm != nullptr; + } +#endif + }; + dispatcher lt(time); + // Too big time values may be unsupported. + if (!lt.run()) FMT_THROW(format_error("time_t value out of range")); + return lt.tm_; +} + +#if FMT_USE_LOCAL_TIME +template +inline auto localtime(std::chrono::local_time time) -> std::tm { + return localtime( + detail::to_time_t(std::chrono::current_zone()->to_sys(time))); +} +#endif + +/** + Converts given time since epoch as ``std::time_t`` value into calendar time, + expressed in Coordinated Universal Time (UTC). Unlike ``std::gmtime``, this + function is thread-safe on most platforms. + */ +inline auto gmtime(std::time_t time) -> std::tm { + struct dispatcher { + std::time_t time_; + std::tm tm_; + + dispatcher(std::time_t t) : time_(t) {} + + auto run() -> bool { + using namespace fmt::detail; + return handle(gmtime_r(&time_, &tm_)); + } + + auto handle(std::tm* tm) -> bool { return tm != nullptr; } + + auto handle(detail::null<>) -> bool { + using namespace fmt::detail; + return fallback(gmtime_s(&tm_, &time_)); + } + + auto fallback(int res) -> bool { return res == 0; } + +#if !FMT_MSC_VERSION + auto fallback(detail::null<>) -> bool { + std::tm* tm = std::gmtime(&time_); + if (tm) tm_ = *tm; + return tm != nullptr; + } +#endif + }; + auto gt = dispatcher(time); + // Too big time values may be unsupported. + if (!gt.run()) FMT_THROW(format_error("time_t value out of range")); + return gt.tm_; +} + +template +inline auto gmtime( + std::chrono::time_point time_point) + -> std::tm { + return gmtime(detail::to_time_t(time_point)); +} + +namespace detail { + +// Writes two-digit numbers a, b and c separated by sep to buf. +// The method by Pavel Novikov based on +// https://johnnylee-sde.github.io/Fast-unsigned-integer-to-time-string/. +inline void write_digit2_separated(char* buf, unsigned a, unsigned b, + unsigned c, char sep) { + unsigned long long digits = + a | (b << 24) | (static_cast(c) << 48); + // Convert each value to BCD. + // We have x = a * 10 + b and we want to convert it to BCD y = a * 16 + b. + // The difference is + // y - x = a * 6 + // a can be found from x: + // a = floor(x / 10) + // then + // y = x + a * 6 = x + floor(x / 10) * 6 + // floor(x / 10) is (x * 205) >> 11 (needs 16 bits). + digits += (((digits * 205) >> 11) & 0x000f00000f00000f) * 6; + // Put low nibbles to high bytes and high nibbles to low bytes. + digits = ((digits & 0x00f00000f00000f0) >> 4) | + ((digits & 0x000f00000f00000f) << 8); + auto usep = static_cast(sep); + // Add ASCII '0' to each digit byte and insert separators. + digits |= 0x3030003030003030 | (usep << 16) | (usep << 40); + + constexpr const size_t len = 8; + if (const_check(is_big_endian())) { + char tmp[len]; + std::memcpy(tmp, &digits, len); + std::reverse_copy(tmp, tmp + len, buf); + } else { + std::memcpy(buf, &digits, len); + } +} + +template +FMT_CONSTEXPR inline auto get_units() -> const char* { + if (std::is_same::value) return "as"; + if (std::is_same::value) return "fs"; + if (std::is_same::value) return "ps"; + if (std::is_same::value) return "ns"; + if (std::is_same::value) return "µs"; + if (std::is_same::value) return "ms"; + if (std::is_same::value) return "cs"; + if (std::is_same::value) return "ds"; + if (std::is_same>::value) return "s"; + if (std::is_same::value) return "das"; + if (std::is_same::value) return "hs"; + if (std::is_same::value) return "ks"; + if (std::is_same::value) return "Ms"; + if (std::is_same::value) return "Gs"; + if (std::is_same::value) return "Ts"; + if (std::is_same::value) return "Ps"; + if (std::is_same::value) return "Es"; + if (std::is_same>::value) return "min"; + if (std::is_same>::value) return "h"; + if (std::is_same>::value) return "d"; + return nullptr; +} + +enum class numeric_system { + standard, + // Alternative numeric system, e.g. 十二 instead of 12 in ja_JP locale. + alternative +}; + +// Glibc extensions for formatting numeric values. +enum class pad_type { + unspecified, + // Do not pad a numeric result string. + none, + // Pad a numeric result string with zeros even if the conversion specifier + // character uses space-padding by default. + zero, + // Pad a numeric result string with spaces. + space, +}; + +template +auto write_padding(OutputIt out, pad_type pad, int width) -> OutputIt { + if (pad == pad_type::none) return out; + return std::fill_n(out, width, pad == pad_type::space ? ' ' : '0'); +} + +template +auto write_padding(OutputIt out, pad_type pad) -> OutputIt { + if (pad != pad_type::none) *out++ = pad == pad_type::space ? ' ' : '0'; + return out; +} + +// Parses a put_time-like format string and invokes handler actions. +template +FMT_CONSTEXPR auto parse_chrono_format(const Char* begin, const Char* end, + Handler&& handler) -> const Char* { + if (begin == end || *begin == '}') return begin; + if (*begin != '%') FMT_THROW(format_error("invalid format")); + auto ptr = begin; + pad_type pad = pad_type::unspecified; + while (ptr != end) { + auto c = *ptr; + if (c == '}') break; + if (c != '%') { + ++ptr; + continue; + } + if (begin != ptr) handler.on_text(begin, ptr); + ++ptr; // consume '%' + if (ptr == end) FMT_THROW(format_error("invalid format")); + c = *ptr; + switch (c) { + case '_': + pad = pad_type::space; + ++ptr; + break; + case '-': + pad = pad_type::none; + ++ptr; + break; + case '0': + pad = pad_type::zero; + ++ptr; + break; + } + if (ptr == end) FMT_THROW(format_error("invalid format")); + c = *ptr++; + switch (c) { + case '%': + handler.on_text(ptr - 1, ptr); + break; + case 'n': { + const Char newline[] = {'\n'}; + handler.on_text(newline, newline + 1); + break; + } + case 't': { + const Char tab[] = {'\t'}; + handler.on_text(tab, tab + 1); + break; + } + // Year: + case 'Y': + handler.on_year(numeric_system::standard); + break; + case 'y': + handler.on_short_year(numeric_system::standard); + break; + case 'C': + handler.on_century(numeric_system::standard); + break; + case 'G': + handler.on_iso_week_based_year(); + break; + case 'g': + handler.on_iso_week_based_short_year(); + break; + // Day of the week: + case 'a': + handler.on_abbr_weekday(); + break; + case 'A': + handler.on_full_weekday(); + break; + case 'w': + handler.on_dec0_weekday(numeric_system::standard); + break; + case 'u': + handler.on_dec1_weekday(numeric_system::standard); + break; + // Month: + case 'b': + case 'h': + handler.on_abbr_month(); + break; + case 'B': + handler.on_full_month(); + break; + case 'm': + handler.on_dec_month(numeric_system::standard); + break; + // Day of the year/month: + case 'U': + handler.on_dec0_week_of_year(numeric_system::standard); + break; + case 'W': + handler.on_dec1_week_of_year(numeric_system::standard); + break; + case 'V': + handler.on_iso_week_of_year(numeric_system::standard); + break; + case 'j': + handler.on_day_of_year(); + break; + case 'd': + handler.on_day_of_month(numeric_system::standard); + break; + case 'e': + handler.on_day_of_month_space(numeric_system::standard); + break; + // Hour, minute, second: + case 'H': + handler.on_24_hour(numeric_system::standard, pad); + break; + case 'I': + handler.on_12_hour(numeric_system::standard, pad); + break; + case 'M': + handler.on_minute(numeric_system::standard, pad); + break; + case 'S': + handler.on_second(numeric_system::standard, pad); + break; + // Other: + case 'c': + handler.on_datetime(numeric_system::standard); + break; + case 'x': + handler.on_loc_date(numeric_system::standard); + break; + case 'X': + handler.on_loc_time(numeric_system::standard); + break; + case 'D': + handler.on_us_date(); + break; + case 'F': + handler.on_iso_date(); + break; + case 'r': + handler.on_12_hour_time(); + break; + case 'R': + handler.on_24_hour_time(); + break; + case 'T': + handler.on_iso_time(); + break; + case 'p': + handler.on_am_pm(); + break; + case 'Q': + handler.on_duration_value(); + break; + case 'q': + handler.on_duration_unit(); + break; + case 'z': + handler.on_utc_offset(numeric_system::standard); + break; + case 'Z': + handler.on_tz_name(); + break; + // Alternative representation: + case 'E': { + if (ptr == end) FMT_THROW(format_error("invalid format")); + c = *ptr++; + switch (c) { + case 'Y': + handler.on_year(numeric_system::alternative); + break; + case 'y': + handler.on_offset_year(); + break; + case 'C': + handler.on_century(numeric_system::alternative); + break; + case 'c': + handler.on_datetime(numeric_system::alternative); + break; + case 'x': + handler.on_loc_date(numeric_system::alternative); + break; + case 'X': + handler.on_loc_time(numeric_system::alternative); + break; + case 'z': + handler.on_utc_offset(numeric_system::alternative); + break; + default: + FMT_THROW(format_error("invalid format")); + } + break; + } + case 'O': + if (ptr == end) FMT_THROW(format_error("invalid format")); + c = *ptr++; + switch (c) { + case 'y': + handler.on_short_year(numeric_system::alternative); + break; + case 'm': + handler.on_dec_month(numeric_system::alternative); + break; + case 'U': + handler.on_dec0_week_of_year(numeric_system::alternative); + break; + case 'W': + handler.on_dec1_week_of_year(numeric_system::alternative); + break; + case 'V': + handler.on_iso_week_of_year(numeric_system::alternative); + break; + case 'd': + handler.on_day_of_month(numeric_system::alternative); + break; + case 'e': + handler.on_day_of_month_space(numeric_system::alternative); + break; + case 'w': + handler.on_dec0_weekday(numeric_system::alternative); + break; + case 'u': + handler.on_dec1_weekday(numeric_system::alternative); + break; + case 'H': + handler.on_24_hour(numeric_system::alternative, pad); + break; + case 'I': + handler.on_12_hour(numeric_system::alternative, pad); + break; + case 'M': + handler.on_minute(numeric_system::alternative, pad); + break; + case 'S': + handler.on_second(numeric_system::alternative, pad); + break; + case 'z': + handler.on_utc_offset(numeric_system::alternative); + break; + default: + FMT_THROW(format_error("invalid format")); + } + break; + default: + FMT_THROW(format_error("invalid format")); + } + begin = ptr; + } + if (begin != ptr) handler.on_text(begin, ptr); + return ptr; +} + +template struct null_chrono_spec_handler { + FMT_CONSTEXPR void unsupported() { + static_cast(this)->unsupported(); + } + FMT_CONSTEXPR void on_year(numeric_system) { unsupported(); } + FMT_CONSTEXPR void on_short_year(numeric_system) { unsupported(); } + FMT_CONSTEXPR void on_offset_year() { unsupported(); } + FMT_CONSTEXPR void on_century(numeric_system) { unsupported(); } + FMT_CONSTEXPR void on_iso_week_based_year() { unsupported(); } + FMT_CONSTEXPR void on_iso_week_based_short_year() { unsupported(); } + FMT_CONSTEXPR void on_abbr_weekday() { unsupported(); } + FMT_CONSTEXPR void on_full_weekday() { unsupported(); } + FMT_CONSTEXPR void on_dec0_weekday(numeric_system) { unsupported(); } + FMT_CONSTEXPR void on_dec1_weekday(numeric_system) { unsupported(); } + FMT_CONSTEXPR void on_abbr_month() { unsupported(); } + FMT_CONSTEXPR void on_full_month() { unsupported(); } + FMT_CONSTEXPR void on_dec_month(numeric_system) { unsupported(); } + FMT_CONSTEXPR void on_dec0_week_of_year(numeric_system) { unsupported(); } + FMT_CONSTEXPR void on_dec1_week_of_year(numeric_system) { unsupported(); } + FMT_CONSTEXPR void on_iso_week_of_year(numeric_system) { unsupported(); } + FMT_CONSTEXPR void on_day_of_year() { unsupported(); } + FMT_CONSTEXPR void on_day_of_month(numeric_system) { unsupported(); } + FMT_CONSTEXPR void on_day_of_month_space(numeric_system) { unsupported(); } + FMT_CONSTEXPR void on_24_hour(numeric_system) { unsupported(); } + FMT_CONSTEXPR void on_12_hour(numeric_system) { unsupported(); } + FMT_CONSTEXPR void on_minute(numeric_system) { unsupported(); } + FMT_CONSTEXPR void on_second(numeric_system) { unsupported(); } + FMT_CONSTEXPR void on_datetime(numeric_system) { unsupported(); } + FMT_CONSTEXPR void on_loc_date(numeric_system) { unsupported(); } + FMT_CONSTEXPR void on_loc_time(numeric_system) { unsupported(); } + FMT_CONSTEXPR void on_us_date() { unsupported(); } + FMT_CONSTEXPR void on_iso_date() { unsupported(); } + FMT_CONSTEXPR void on_12_hour_time() { unsupported(); } + FMT_CONSTEXPR void on_24_hour_time() { unsupported(); } + FMT_CONSTEXPR void on_iso_time() { unsupported(); } + FMT_CONSTEXPR void on_am_pm() { unsupported(); } + FMT_CONSTEXPR void on_duration_value() { unsupported(); } + FMT_CONSTEXPR void on_duration_unit() { unsupported(); } + FMT_CONSTEXPR void on_utc_offset(numeric_system) { unsupported(); } + FMT_CONSTEXPR void on_tz_name() { unsupported(); } +}; + +struct tm_format_checker : null_chrono_spec_handler { + FMT_NORETURN void unsupported() { FMT_THROW(format_error("no format")); } + + template + FMT_CONSTEXPR void on_text(const Char*, const Char*) {} + FMT_CONSTEXPR void on_year(numeric_system) {} + FMT_CONSTEXPR void on_short_year(numeric_system) {} + FMT_CONSTEXPR void on_offset_year() {} + FMT_CONSTEXPR void on_century(numeric_system) {} + FMT_CONSTEXPR void on_iso_week_based_year() {} + FMT_CONSTEXPR void on_iso_week_based_short_year() {} + FMT_CONSTEXPR void on_abbr_weekday() {} + FMT_CONSTEXPR void on_full_weekday() {} + FMT_CONSTEXPR void on_dec0_weekday(numeric_system) {} + FMT_CONSTEXPR void on_dec1_weekday(numeric_system) {} + FMT_CONSTEXPR void on_abbr_month() {} + FMT_CONSTEXPR void on_full_month() {} + FMT_CONSTEXPR void on_dec_month(numeric_system) {} + FMT_CONSTEXPR void on_dec0_week_of_year(numeric_system) {} + FMT_CONSTEXPR void on_dec1_week_of_year(numeric_system) {} + FMT_CONSTEXPR void on_iso_week_of_year(numeric_system) {} + FMT_CONSTEXPR void on_day_of_year() {} + FMT_CONSTEXPR void on_day_of_month(numeric_system) {} + FMT_CONSTEXPR void on_day_of_month_space(numeric_system) {} + FMT_CONSTEXPR void on_24_hour(numeric_system, pad_type) {} + FMT_CONSTEXPR void on_12_hour(numeric_system, pad_type) {} + FMT_CONSTEXPR void on_minute(numeric_system, pad_type) {} + FMT_CONSTEXPR void on_second(numeric_system, pad_type) {} + FMT_CONSTEXPR void on_datetime(numeric_system) {} + FMT_CONSTEXPR void on_loc_date(numeric_system) {} + FMT_CONSTEXPR void on_loc_time(numeric_system) {} + FMT_CONSTEXPR void on_us_date() {} + FMT_CONSTEXPR void on_iso_date() {} + FMT_CONSTEXPR void on_12_hour_time() {} + FMT_CONSTEXPR void on_24_hour_time() {} + FMT_CONSTEXPR void on_iso_time() {} + FMT_CONSTEXPR void on_am_pm() {} + FMT_CONSTEXPR void on_utc_offset(numeric_system) {} + FMT_CONSTEXPR void on_tz_name() {} +}; + +inline auto tm_wday_full_name(int wday) -> const char* { + static constexpr const char* full_name_list[] = { + "Sunday", "Monday", "Tuesday", "Wednesday", + "Thursday", "Friday", "Saturday"}; + return wday >= 0 && wday <= 6 ? full_name_list[wday] : "?"; +} +inline auto tm_wday_short_name(int wday) -> const char* { + static constexpr const char* short_name_list[] = {"Sun", "Mon", "Tue", "Wed", + "Thu", "Fri", "Sat"}; + return wday >= 0 && wday <= 6 ? short_name_list[wday] : "???"; +} + +inline auto tm_mon_full_name(int mon) -> const char* { + static constexpr const char* full_name_list[] = { + "January", "February", "March", "April", "May", "June", + "July", "August", "September", "October", "November", "December"}; + return mon >= 0 && mon <= 11 ? full_name_list[mon] : "?"; +} +inline auto tm_mon_short_name(int mon) -> const char* { + static constexpr const char* short_name_list[] = { + "Jan", "Feb", "Mar", "Apr", "May", "Jun", + "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", + }; + return mon >= 0 && mon <= 11 ? short_name_list[mon] : "???"; +} + +template +struct has_member_data_tm_gmtoff : std::false_type {}; +template +struct has_member_data_tm_gmtoff> + : std::true_type {}; + +template +struct has_member_data_tm_zone : std::false_type {}; +template +struct has_member_data_tm_zone> + : std::true_type {}; + +#if FMT_USE_TZSET +inline void tzset_once() { + static bool init = []() -> bool { + _tzset(); + return true; + }(); + ignore_unused(init); +} +#endif + +// Converts value to Int and checks that it's in the range [0, upper). +template ::value)> +inline auto to_nonnegative_int(T value, Int upper) -> Int { + if (!std::is_unsigned::value && + (value < 0 || to_unsigned(value) > to_unsigned(upper))) { + FMT_THROW(fmt::format_error("chrono value is out of range")); + } + return static_cast(value); +} +template ::value)> +inline auto to_nonnegative_int(T value, Int upper) -> Int { + if (value < 0 || value > static_cast(upper)) + FMT_THROW(format_error("invalid value")); + return static_cast(value); +} + +constexpr auto pow10(std::uint32_t n) -> long long { + return n == 0 ? 1 : 10 * pow10(n - 1); +} + +// Counts the number of fractional digits in the range [0, 18] according to the +// C++20 spec. If more than 18 fractional digits are required then returns 6 for +// microseconds precision. +template () / 10)> +struct count_fractional_digits { + static constexpr int value = + Num % Den == 0 ? N : count_fractional_digits::value; +}; + +// Base case that doesn't instantiate any more templates +// in order to avoid overflow. +template +struct count_fractional_digits { + static constexpr int value = (Num % Den == 0) ? N : 6; +}; + +// Format subseconds which are given as an integer type with an appropriate +// number of digits. +template +void write_fractional_seconds(OutputIt& out, Duration d, int precision = -1) { + constexpr auto num_fractional_digits = + count_fractional_digits::value; + + using subsecond_precision = std::chrono::duration< + typename std::common_type::type, + std::ratio<1, detail::pow10(num_fractional_digits)>>; + + const auto fractional = d - fmt_duration_cast(d); + const auto subseconds = + std::chrono::treat_as_floating_point< + typename subsecond_precision::rep>::value + ? fractional.count() + : fmt_duration_cast(fractional).count(); + auto n = static_cast>(subseconds); + const int num_digits = detail::count_digits(n); + + int leading_zeroes = (std::max)(0, num_fractional_digits - num_digits); + if (precision < 0) { + FMT_ASSERT(!std::is_floating_point::value, ""); + if (std::ratio_less::value) { + *out++ = '.'; + out = std::fill_n(out, leading_zeroes, '0'); + out = format_decimal(out, n, num_digits).end; + } + } else { + *out++ = '.'; + leading_zeroes = (std::min)(leading_zeroes, precision); + out = std::fill_n(out, leading_zeroes, '0'); + int remaining = precision - leading_zeroes; + if (remaining != 0 && remaining < num_digits) { + n /= to_unsigned(detail::pow10(to_unsigned(num_digits - remaining))); + out = format_decimal(out, n, remaining).end; + return; + } + out = format_decimal(out, n, num_digits).end; + remaining -= num_digits; + out = std::fill_n(out, remaining, '0'); + } +} + +// Format subseconds which are given as a floating point type with an +// appropriate number of digits. We cannot pass the Duration here, as we +// explicitly need to pass the Rep value in the chrono_formatter. +template +void write_floating_seconds(memory_buffer& buf, Duration duration, + int num_fractional_digits = -1) { + using rep = typename Duration::rep; + FMT_ASSERT(std::is_floating_point::value, ""); + + auto val = duration.count(); + + if (num_fractional_digits < 0) { + // For `std::round` with fallback to `round`: + // On some toolchains `std::round` is not available (e.g. GCC 6). + using namespace std; + num_fractional_digits = + count_fractional_digits::value; + if (num_fractional_digits < 6 && static_cast(round(val)) != val) + num_fractional_digits = 6; + } + + fmt::format_to(std::back_inserter(buf), FMT_STRING("{:.{}f}"), + std::fmod(val * static_cast(Duration::period::num) / + static_cast(Duration::period::den), + static_cast(60)), + num_fractional_digits); +} + +template +class tm_writer { + private: + static constexpr int days_per_week = 7; + + const std::locale& loc_; + const bool is_classic_; + OutputIt out_; + const Duration* subsecs_; + const std::tm& tm_; + + auto tm_sec() const noexcept -> int { + FMT_ASSERT(tm_.tm_sec >= 0 && tm_.tm_sec <= 61, ""); + return tm_.tm_sec; + } + auto tm_min() const noexcept -> int { + FMT_ASSERT(tm_.tm_min >= 0 && tm_.tm_min <= 59, ""); + return tm_.tm_min; + } + auto tm_hour() const noexcept -> int { + FMT_ASSERT(tm_.tm_hour >= 0 && tm_.tm_hour <= 23, ""); + return tm_.tm_hour; + } + auto tm_mday() const noexcept -> int { + FMT_ASSERT(tm_.tm_mday >= 1 && tm_.tm_mday <= 31, ""); + return tm_.tm_mday; + } + auto tm_mon() const noexcept -> int { + FMT_ASSERT(tm_.tm_mon >= 0 && tm_.tm_mon <= 11, ""); + return tm_.tm_mon; + } + auto tm_year() const noexcept -> long long { return 1900ll + tm_.tm_year; } + auto tm_wday() const noexcept -> int { + FMT_ASSERT(tm_.tm_wday >= 0 && tm_.tm_wday <= 6, ""); + return tm_.tm_wday; + } + auto tm_yday() const noexcept -> int { + FMT_ASSERT(tm_.tm_yday >= 0 && tm_.tm_yday <= 365, ""); + return tm_.tm_yday; + } + + auto tm_hour12() const noexcept -> int { + const auto h = tm_hour(); + const auto z = h < 12 ? h : h - 12; + return z == 0 ? 12 : z; + } + + // POSIX and the C Standard are unclear or inconsistent about what %C and %y + // do if the year is negative or exceeds 9999. Use the convention that %C + // concatenated with %y yields the same output as %Y, and that %Y contains at + // least 4 characters, with more only if necessary. + auto split_year_lower(long long year) const noexcept -> int { + auto l = year % 100; + if (l < 0) l = -l; // l in [0, 99] + return static_cast(l); + } + + // Algorithm: https://en.wikipedia.org/wiki/ISO_week_date. + auto iso_year_weeks(long long curr_year) const noexcept -> int { + const auto prev_year = curr_year - 1; + const auto curr_p = + (curr_year + curr_year / 4 - curr_year / 100 + curr_year / 400) % + days_per_week; + const auto prev_p = + (prev_year + prev_year / 4 - prev_year / 100 + prev_year / 400) % + days_per_week; + return 52 + ((curr_p == 4 || prev_p == 3) ? 1 : 0); + } + auto iso_week_num(int tm_yday, int tm_wday) const noexcept -> int { + return (tm_yday + 11 - (tm_wday == 0 ? days_per_week : tm_wday)) / + days_per_week; + } + auto tm_iso_week_year() const noexcept -> long long { + const auto year = tm_year(); + const auto w = iso_week_num(tm_yday(), tm_wday()); + if (w < 1) return year - 1; + if (w > iso_year_weeks(year)) return year + 1; + return year; + } + auto tm_iso_week_of_year() const noexcept -> int { + const auto year = tm_year(); + const auto w = iso_week_num(tm_yday(), tm_wday()); + if (w < 1) return iso_year_weeks(year - 1); + if (w > iso_year_weeks(year)) return 1; + return w; + } + + void write1(int value) { + *out_++ = static_cast('0' + to_unsigned(value) % 10); + } + void write2(int value) { + const char* d = digits2(to_unsigned(value) % 100); + *out_++ = *d++; + *out_++ = *d; + } + void write2(int value, pad_type pad) { + unsigned int v = to_unsigned(value) % 100; + if (v >= 10) { + const char* d = digits2(v); + *out_++ = *d++; + *out_++ = *d; + } else { + out_ = detail::write_padding(out_, pad); + *out_++ = static_cast('0' + v); + } + } + + void write_year_extended(long long year) { + // At least 4 characters. + int width = 4; + if (year < 0) { + *out_++ = '-'; + year = 0 - year; + --width; + } + uint32_or_64_or_128_t n = to_unsigned(year); + const int num_digits = count_digits(n); + if (width > num_digits) out_ = std::fill_n(out_, width - num_digits, '0'); + out_ = format_decimal(out_, n, num_digits).end; + } + void write_year(long long year) { + if (year >= 0 && year < 10000) { + write2(static_cast(year / 100)); + write2(static_cast(year % 100)); + } else { + write_year_extended(year); + } + } + + void write_utc_offset(long offset, numeric_system ns) { + if (offset < 0) { + *out_++ = '-'; + offset = -offset; + } else { + *out_++ = '+'; + } + offset /= 60; + write2(static_cast(offset / 60)); + if (ns != numeric_system::standard) *out_++ = ':'; + write2(static_cast(offset % 60)); + } + template ::value)> + void format_utc_offset_impl(const T& tm, numeric_system ns) { + write_utc_offset(tm.tm_gmtoff, ns); + } + template ::value)> + void format_utc_offset_impl(const T& tm, numeric_system ns) { +#if defined(_WIN32) && defined(_UCRT) +# if FMT_USE_TZSET + tzset_once(); +# endif + long offset = 0; + _get_timezone(&offset); + if (tm.tm_isdst) { + long dstbias = 0; + _get_dstbias(&dstbias); + offset += dstbias; + } + write_utc_offset(-offset, ns); +#else + if (ns == numeric_system::standard) return format_localized('z'); + + // Extract timezone offset from timezone conversion functions. + std::tm gtm = tm; + std::time_t gt = std::mktime(>m); + std::tm ltm = gmtime(gt); + std::time_t lt = std::mktime(<m); + long offset = gt - lt; + write_utc_offset(offset, ns); +#endif + } + + template ::value)> + void format_tz_name_impl(const T& tm) { + if (is_classic_) + out_ = write_tm_str(out_, tm.tm_zone, loc_); + else + format_localized('Z'); + } + template ::value)> + void format_tz_name_impl(const T&) { + format_localized('Z'); + } + + void format_localized(char format, char modifier = 0) { + out_ = write(out_, tm_, loc_, format, modifier); + } + + public: + tm_writer(const std::locale& loc, OutputIt out, const std::tm& tm, + const Duration* subsecs = nullptr) + : loc_(loc), + is_classic_(loc_ == get_classic_locale()), + out_(out), + subsecs_(subsecs), + tm_(tm) {} + + auto out() const -> OutputIt { return out_; } + + FMT_CONSTEXPR void on_text(const Char* begin, const Char* end) { + out_ = copy_str(begin, end, out_); + } + + void on_abbr_weekday() { + if (is_classic_) + out_ = write(out_, tm_wday_short_name(tm_wday())); + else + format_localized('a'); + } + void on_full_weekday() { + if (is_classic_) + out_ = write(out_, tm_wday_full_name(tm_wday())); + else + format_localized('A'); + } + void on_dec0_weekday(numeric_system ns) { + if (is_classic_ || ns == numeric_system::standard) return write1(tm_wday()); + format_localized('w', 'O'); + } + void on_dec1_weekday(numeric_system ns) { + if (is_classic_ || ns == numeric_system::standard) { + auto wday = tm_wday(); + write1(wday == 0 ? days_per_week : wday); + } else { + format_localized('u', 'O'); + } + } + + void on_abbr_month() { + if (is_classic_) + out_ = write(out_, tm_mon_short_name(tm_mon())); + else + format_localized('b'); + } + void on_full_month() { + if (is_classic_) + out_ = write(out_, tm_mon_full_name(tm_mon())); + else + format_localized('B'); + } + + void on_datetime(numeric_system ns) { + if (is_classic_) { + on_abbr_weekday(); + *out_++ = ' '; + on_abbr_month(); + *out_++ = ' '; + on_day_of_month_space(numeric_system::standard); + *out_++ = ' '; + on_iso_time(); + *out_++ = ' '; + on_year(numeric_system::standard); + } else { + format_localized('c', ns == numeric_system::standard ? '\0' : 'E'); + } + } + void on_loc_date(numeric_system ns) { + if (is_classic_) + on_us_date(); + else + format_localized('x', ns == numeric_system::standard ? '\0' : 'E'); + } + void on_loc_time(numeric_system ns) { + if (is_classic_) + on_iso_time(); + else + format_localized('X', ns == numeric_system::standard ? '\0' : 'E'); + } + void on_us_date() { + char buf[8]; + write_digit2_separated(buf, to_unsigned(tm_mon() + 1), + to_unsigned(tm_mday()), + to_unsigned(split_year_lower(tm_year())), '/'); + out_ = copy_str(std::begin(buf), std::end(buf), out_); + } + void on_iso_date() { + auto year = tm_year(); + char buf[10]; + size_t offset = 0; + if (year >= 0 && year < 10000) { + copy2(buf, digits2(static_cast(year / 100))); + } else { + offset = 4; + write_year_extended(year); + year = 0; + } + write_digit2_separated(buf + 2, static_cast(year % 100), + to_unsigned(tm_mon() + 1), to_unsigned(tm_mday()), + '-'); + out_ = copy_str(std::begin(buf) + offset, std::end(buf), out_); + } + + void on_utc_offset(numeric_system ns) { format_utc_offset_impl(tm_, ns); } + void on_tz_name() { format_tz_name_impl(tm_); } + + void on_year(numeric_system ns) { + if (is_classic_ || ns == numeric_system::standard) + return write_year(tm_year()); + format_localized('Y', 'E'); + } + void on_short_year(numeric_system ns) { + if (is_classic_ || ns == numeric_system::standard) + return write2(split_year_lower(tm_year())); + format_localized('y', 'O'); + } + void on_offset_year() { + if (is_classic_) return write2(split_year_lower(tm_year())); + format_localized('y', 'E'); + } + + void on_century(numeric_system ns) { + if (is_classic_ || ns == numeric_system::standard) { + auto year = tm_year(); + auto upper = year / 100; + if (year >= -99 && year < 0) { + // Zero upper on negative year. + *out_++ = '-'; + *out_++ = '0'; + } else if (upper >= 0 && upper < 100) { + write2(static_cast(upper)); + } else { + out_ = write(out_, upper); + } + } else { + format_localized('C', 'E'); + } + } + + void on_dec_month(numeric_system ns) { + if (is_classic_ || ns == numeric_system::standard) + return write2(tm_mon() + 1); + format_localized('m', 'O'); + } + + void on_dec0_week_of_year(numeric_system ns) { + if (is_classic_ || ns == numeric_system::standard) + return write2((tm_yday() + days_per_week - tm_wday()) / days_per_week); + format_localized('U', 'O'); + } + void on_dec1_week_of_year(numeric_system ns) { + if (is_classic_ || ns == numeric_system::standard) { + auto wday = tm_wday(); + write2((tm_yday() + days_per_week - + (wday == 0 ? (days_per_week - 1) : (wday - 1))) / + days_per_week); + } else { + format_localized('W', 'O'); + } + } + void on_iso_week_of_year(numeric_system ns) { + if (is_classic_ || ns == numeric_system::standard) + return write2(tm_iso_week_of_year()); + format_localized('V', 'O'); + } + + void on_iso_week_based_year() { write_year(tm_iso_week_year()); } + void on_iso_week_based_short_year() { + write2(split_year_lower(tm_iso_week_year())); + } + + void on_day_of_year() { + auto yday = tm_yday() + 1; + write1(yday / 100); + write2(yday % 100); + } + void on_day_of_month(numeric_system ns) { + if (is_classic_ || ns == numeric_system::standard) return write2(tm_mday()); + format_localized('d', 'O'); + } + void on_day_of_month_space(numeric_system ns) { + if (is_classic_ || ns == numeric_system::standard) { + auto mday = to_unsigned(tm_mday()) % 100; + const char* d2 = digits2(mday); + *out_++ = mday < 10 ? ' ' : d2[0]; + *out_++ = d2[1]; + } else { + format_localized('e', 'O'); + } + } + + void on_24_hour(numeric_system ns, pad_type pad) { + if (is_classic_ || ns == numeric_system::standard) + return write2(tm_hour(), pad); + format_localized('H', 'O'); + } + void on_12_hour(numeric_system ns, pad_type pad) { + if (is_classic_ || ns == numeric_system::standard) + return write2(tm_hour12(), pad); + format_localized('I', 'O'); + } + void on_minute(numeric_system ns, pad_type pad) { + if (is_classic_ || ns == numeric_system::standard) + return write2(tm_min(), pad); + format_localized('M', 'O'); + } + + void on_second(numeric_system ns, pad_type pad) { + if (is_classic_ || ns == numeric_system::standard) { + write2(tm_sec(), pad); + if (subsecs_) { + if (std::is_floating_point::value) { + auto buf = memory_buffer(); + write_floating_seconds(buf, *subsecs_); + if (buf.size() > 1) { + // Remove the leading "0", write something like ".123". + out_ = std::copy(buf.begin() + 1, buf.end(), out_); + } + } else { + write_fractional_seconds(out_, *subsecs_); + } + } + } else { + // Currently no formatting of subseconds when a locale is set. + format_localized('S', 'O'); + } + } + + void on_12_hour_time() { + if (is_classic_) { + char buf[8]; + write_digit2_separated(buf, to_unsigned(tm_hour12()), + to_unsigned(tm_min()), to_unsigned(tm_sec()), ':'); + out_ = copy_str(std::begin(buf), std::end(buf), out_); + *out_++ = ' '; + on_am_pm(); + } else { + format_localized('r'); + } + } + void on_24_hour_time() { + write2(tm_hour()); + *out_++ = ':'; + write2(tm_min()); + } + void on_iso_time() { + on_24_hour_time(); + *out_++ = ':'; + on_second(numeric_system::standard, pad_type::unspecified); + } + + void on_am_pm() { + if (is_classic_) { + *out_++ = tm_hour() < 12 ? 'A' : 'P'; + *out_++ = 'M'; + } else { + format_localized('p'); + } + } + + // These apply to chrono durations but not tm. + void on_duration_value() {} + void on_duration_unit() {} +}; + +struct chrono_format_checker : null_chrono_spec_handler { + bool has_precision_integral = false; + + FMT_NORETURN void unsupported() { FMT_THROW(format_error("no date")); } + + template + FMT_CONSTEXPR void on_text(const Char*, const Char*) {} + FMT_CONSTEXPR void on_day_of_year() {} + FMT_CONSTEXPR void on_24_hour(numeric_system, pad_type) {} + FMT_CONSTEXPR void on_12_hour(numeric_system, pad_type) {} + FMT_CONSTEXPR void on_minute(numeric_system, pad_type) {} + FMT_CONSTEXPR void on_second(numeric_system, pad_type) {} + FMT_CONSTEXPR void on_12_hour_time() {} + FMT_CONSTEXPR void on_24_hour_time() {} + FMT_CONSTEXPR void on_iso_time() {} + FMT_CONSTEXPR void on_am_pm() {} + FMT_CONSTEXPR void on_duration_value() const { + if (has_precision_integral) { + FMT_THROW(format_error("precision not allowed for this argument type")); + } + } + FMT_CONSTEXPR void on_duration_unit() {} +}; + +template ::value&& has_isfinite::value)> +inline auto isfinite(T) -> bool { + return true; +} + +template ::value)> +inline auto mod(T x, int y) -> T { + return x % static_cast(y); +} +template ::value)> +inline auto mod(T x, int y) -> T { + return std::fmod(x, static_cast(y)); +} + +// If T is an integral type, maps T to its unsigned counterpart, otherwise +// leaves it unchanged (unlike std::make_unsigned). +template ::value> +struct make_unsigned_or_unchanged { + using type = T; +}; + +template struct make_unsigned_or_unchanged { + using type = typename std::make_unsigned::type; +}; + +template ::value)> +inline auto get_milliseconds(std::chrono::duration d) + -> std::chrono::duration { + // this may overflow and/or the result may not fit in the + // target type. +#if FMT_SAFE_DURATION_CAST + using CommonSecondsType = + typename std::common_type::type; + const auto d_as_common = fmt_duration_cast(d); + const auto d_as_whole_seconds = + fmt_duration_cast(d_as_common); + // this conversion should be nonproblematic + const auto diff = d_as_common - d_as_whole_seconds; + const auto ms = + fmt_duration_cast>(diff); + return ms; +#else + auto s = fmt_duration_cast(d); + return fmt_duration_cast(d - s); +#endif +} + +template ::value)> +auto format_duration_value(OutputIt out, Rep val, int) -> OutputIt { + return write(out, val); +} + +template ::value)> +auto format_duration_value(OutputIt out, Rep val, int precision) -> OutputIt { + auto specs = format_specs(); + specs.precision = precision; + specs.type = precision >= 0 ? presentation_type::fixed_lower + : presentation_type::general_lower; + return write(out, val, specs); +} + +template +auto copy_unit(string_view unit, OutputIt out, Char) -> OutputIt { + return std::copy(unit.begin(), unit.end(), out); +} + +template +auto copy_unit(string_view unit, OutputIt out, wchar_t) -> OutputIt { + // This works when wchar_t is UTF-32 because units only contain characters + // that have the same representation in UTF-16 and UTF-32. + utf8_to_utf16 u(unit); + return std::copy(u.c_str(), u.c_str() + u.size(), out); +} + +template +auto format_duration_unit(OutputIt out) -> OutputIt { + if (const char* unit = get_units()) + return copy_unit(string_view(unit), out, Char()); + *out++ = '['; + out = write(out, Period::num); + if (const_check(Period::den != 1)) { + *out++ = '/'; + out = write(out, Period::den); + } + *out++ = ']'; + *out++ = 's'; + return out; +} + +class get_locale { + private: + union { + std::locale locale_; + }; + bool has_locale_ = false; + + public: + get_locale(bool localized, locale_ref loc) : has_locale_(localized) { + if (localized) + ::new (&locale_) std::locale(loc.template get()); + } + ~get_locale() { + if (has_locale_) locale_.~locale(); + } + operator const std::locale&() const { + return has_locale_ ? locale_ : get_classic_locale(); + } +}; + +template +struct chrono_formatter { + FormatContext& context; + OutputIt out; + int precision; + bool localized = false; + // rep is unsigned to avoid overflow. + using rep = + conditional_t::value && sizeof(Rep) < sizeof(int), + unsigned, typename make_unsigned_or_unchanged::type>; + rep val; + using seconds = std::chrono::duration; + seconds s; + using milliseconds = std::chrono::duration; + bool negative; + + using char_type = typename FormatContext::char_type; + using tm_writer_type = tm_writer; + + chrono_formatter(FormatContext& ctx, OutputIt o, + std::chrono::duration d) + : context(ctx), + out(o), + val(static_cast(d.count())), + negative(false) { + if (d.count() < 0) { + val = 0 - val; + negative = true; + } + + // this may overflow and/or the result may not fit in the + // target type. + // might need checked conversion (rep!=Rep) + s = fmt_duration_cast(std::chrono::duration(val)); + } + + // returns true if nan or inf, writes to out. + auto handle_nan_inf() -> bool { + if (isfinite(val)) { + return false; + } + if (isnan(val)) { + write_nan(); + return true; + } + // must be +-inf + if (val > 0) { + write_pinf(); + } else { + write_ninf(); + } + return true; + } + + auto days() const -> Rep { return static_cast(s.count() / 86400); } + auto hour() const -> Rep { + return static_cast(mod((s.count() / 3600), 24)); + } + + auto hour12() const -> Rep { + Rep hour = static_cast(mod((s.count() / 3600), 12)); + return hour <= 0 ? 12 : hour; + } + + auto minute() const -> Rep { + return static_cast(mod((s.count() / 60), 60)); + } + auto second() const -> Rep { return static_cast(mod(s.count(), 60)); } + + auto time() const -> std::tm { + auto time = std::tm(); + time.tm_hour = to_nonnegative_int(hour(), 24); + time.tm_min = to_nonnegative_int(minute(), 60); + time.tm_sec = to_nonnegative_int(second(), 60); + return time; + } + + void write_sign() { + if (negative) { + *out++ = '-'; + negative = false; + } + } + + void write(Rep value, int width, pad_type pad = pad_type::unspecified) { + write_sign(); + if (isnan(value)) return write_nan(); + uint32_or_64_or_128_t n = + to_unsigned(to_nonnegative_int(value, max_value())); + int num_digits = detail::count_digits(n); + if (width > num_digits) { + out = detail::write_padding(out, pad, width - num_digits); + } + out = format_decimal(out, n, num_digits).end; + } + + void write_nan() { std::copy_n("nan", 3, out); } + void write_pinf() { std::copy_n("inf", 3, out); } + void write_ninf() { std::copy_n("-inf", 4, out); } + + template + void format_tm(const tm& time, Callback cb, Args... args) { + if (isnan(val)) return write_nan(); + get_locale loc(localized, context.locale()); + auto w = tm_writer_type(loc, out, time); + (w.*cb)(args...); + out = w.out(); + } + + void on_text(const char_type* begin, const char_type* end) { + std::copy(begin, end, out); + } + + // These are not implemented because durations don't have date information. + void on_abbr_weekday() {} + void on_full_weekday() {} + void on_dec0_weekday(numeric_system) {} + void on_dec1_weekday(numeric_system) {} + void on_abbr_month() {} + void on_full_month() {} + void on_datetime(numeric_system) {} + void on_loc_date(numeric_system) {} + void on_loc_time(numeric_system) {} + void on_us_date() {} + void on_iso_date() {} + void on_utc_offset(numeric_system) {} + void on_tz_name() {} + void on_year(numeric_system) {} + void on_short_year(numeric_system) {} + void on_offset_year() {} + void on_century(numeric_system) {} + void on_iso_week_based_year() {} + void on_iso_week_based_short_year() {} + void on_dec_month(numeric_system) {} + void on_dec0_week_of_year(numeric_system) {} + void on_dec1_week_of_year(numeric_system) {} + void on_iso_week_of_year(numeric_system) {} + void on_day_of_month(numeric_system) {} + void on_day_of_month_space(numeric_system) {} + + void on_day_of_year() { + if (handle_nan_inf()) return; + write(days(), 0); + } + + void on_24_hour(numeric_system ns, pad_type pad) { + if (handle_nan_inf()) return; + + if (ns == numeric_system::standard) return write(hour(), 2, pad); + auto time = tm(); + time.tm_hour = to_nonnegative_int(hour(), 24); + format_tm(time, &tm_writer_type::on_24_hour, ns, pad); + } + + void on_12_hour(numeric_system ns, pad_type pad) { + if (handle_nan_inf()) return; + + if (ns == numeric_system::standard) return write(hour12(), 2, pad); + auto time = tm(); + time.tm_hour = to_nonnegative_int(hour12(), 12); + format_tm(time, &tm_writer_type::on_12_hour, ns, pad); + } + + void on_minute(numeric_system ns, pad_type pad) { + if (handle_nan_inf()) return; + + if (ns == numeric_system::standard) return write(minute(), 2, pad); + auto time = tm(); + time.tm_min = to_nonnegative_int(minute(), 60); + format_tm(time, &tm_writer_type::on_minute, ns, pad); + } + + void on_second(numeric_system ns, pad_type pad) { + if (handle_nan_inf()) return; + + if (ns == numeric_system::standard) { + if (std::is_floating_point::value) { + auto buf = memory_buffer(); + write_floating_seconds(buf, std::chrono::duration(val), + precision); + if (negative) *out++ = '-'; + if (buf.size() < 2 || buf[1] == '.') { + out = detail::write_padding(out, pad); + } + out = std::copy(buf.begin(), buf.end(), out); + } else { + write(second(), 2, pad); + write_fractional_seconds( + out, std::chrono::duration(val), precision); + } + return; + } + auto time = tm(); + time.tm_sec = to_nonnegative_int(second(), 60); + format_tm(time, &tm_writer_type::on_second, ns, pad); + } + + void on_12_hour_time() { + if (handle_nan_inf()) return; + format_tm(time(), &tm_writer_type::on_12_hour_time); + } + + void on_24_hour_time() { + if (handle_nan_inf()) { + *out++ = ':'; + handle_nan_inf(); + return; + } + + write(hour(), 2); + *out++ = ':'; + write(minute(), 2); + } + + void on_iso_time() { + on_24_hour_time(); + *out++ = ':'; + if (handle_nan_inf()) return; + on_second(numeric_system::standard, pad_type::unspecified); + } + + void on_am_pm() { + if (handle_nan_inf()) return; + format_tm(time(), &tm_writer_type::on_am_pm); + } + + void on_duration_value() { + if (handle_nan_inf()) return; + write_sign(); + out = format_duration_value(out, val, precision); + } + + void on_duration_unit() { + out = format_duration_unit(out); + } +}; + +} // namespace detail + +#if defined(__cpp_lib_chrono) && __cpp_lib_chrono >= 201907 +using weekday = std::chrono::weekday; +#else +// A fallback version of weekday. +class weekday { + private: + unsigned char value; + + public: + weekday() = default; + explicit constexpr weekday(unsigned wd) noexcept + : value(static_cast(wd != 7 ? wd : 0)) {} + constexpr auto c_encoding() const noexcept -> unsigned { return value; } +}; + +class year_month_day {}; +#endif + +// A rudimentary weekday formatter. +template struct formatter { + private: + bool localized = false; + + public: + FMT_CONSTEXPR auto parse(basic_format_parse_context& ctx) + -> decltype(ctx.begin()) { + auto begin = ctx.begin(), end = ctx.end(); + if (begin != end && *begin == 'L') { + ++begin; + localized = true; + } + return begin; + } + + template + auto format(weekday wd, FormatContext& ctx) const -> decltype(ctx.out()) { + auto time = std::tm(); + time.tm_wday = static_cast(wd.c_encoding()); + detail::get_locale loc(localized, ctx.locale()); + auto w = detail::tm_writer(loc, ctx.out(), time); + w.on_abbr_weekday(); + return w.out(); + } +}; + +template +struct formatter, Char> { + private: + format_specs specs_; + detail::arg_ref width_ref_; + detail::arg_ref precision_ref_; + bool localized_ = false; + basic_string_view format_str_; + + public: + FMT_CONSTEXPR auto parse(basic_format_parse_context& ctx) + -> decltype(ctx.begin()) { + auto it = ctx.begin(), end = ctx.end(); + if (it == end || *it == '}') return it; + + it = detail::parse_align(it, end, specs_); + if (it == end) return it; + + it = detail::parse_dynamic_spec(it, end, specs_.width, width_ref_, ctx); + if (it == end) return it; + + auto checker = detail::chrono_format_checker(); + if (*it == '.') { + checker.has_precision_integral = !std::is_floating_point::value; + it = detail::parse_precision(it, end, specs_.precision, precision_ref_, + ctx); + } + if (it != end && *it == 'L') { + localized_ = true; + ++it; + } + end = detail::parse_chrono_format(it, end, checker); + format_str_ = {it, detail::to_unsigned(end - it)}; + return end; + } + + template + auto format(std::chrono::duration d, FormatContext& ctx) const + -> decltype(ctx.out()) { + auto specs = specs_; + auto precision = specs.precision; + specs.precision = -1; + auto begin = format_str_.begin(), end = format_str_.end(); + // As a possible future optimization, we could avoid extra copying if width + // is not specified. + auto buf = basic_memory_buffer(); + auto out = std::back_inserter(buf); + detail::handle_dynamic_spec(specs.width, width_ref_, + ctx); + detail::handle_dynamic_spec(precision, + precision_ref_, ctx); + if (begin == end || *begin == '}') { + out = detail::format_duration_value(out, d.count(), precision); + detail::format_duration_unit(out); + } else { + using chrono_formatter = + detail::chrono_formatter; + auto f = chrono_formatter(ctx, out, d); + f.precision = precision; + f.localized = localized_; + detail::parse_chrono_format(begin, end, f); + } + return detail::write( + ctx.out(), basic_string_view(buf.data(), buf.size()), specs); + } +}; + +template +struct formatter, + Char> : formatter { + FMT_CONSTEXPR formatter() { + this->format_str_ = detail::string_literal{}; + } + + template + auto format(std::chrono::time_point val, + FormatContext& ctx) const -> decltype(ctx.out()) { + using period = typename Duration::period; + if (detail::const_check( + period::num != 1 || period::den != 1 || + std::is_floating_point::value)) { + const auto epoch = val.time_since_epoch(); + auto subsecs = detail::fmt_duration_cast( + epoch - detail::fmt_duration_cast(epoch)); + + if (subsecs.count() < 0) { + auto second = + detail::fmt_duration_cast(std::chrono::seconds(1)); + if (epoch.count() < ((Duration::min)() + second).count()) + FMT_THROW(format_error("duration is too small")); + subsecs += second; + val -= second; + } + + return formatter::do_format(gmtime(val), ctx, &subsecs); + } + + return formatter::format(gmtime(val), ctx); + } +}; + +#if FMT_USE_LOCAL_TIME +template +struct formatter, Char> + : formatter { + FMT_CONSTEXPR formatter() { + this->format_str_ = detail::string_literal{}; + } + + template + auto format(std::chrono::local_time val, FormatContext& ctx) const + -> decltype(ctx.out()) { + using period = typename Duration::period; + if (period::num != 1 || period::den != 1 || + std::is_floating_point::value) { + const auto epoch = val.time_since_epoch(); + const auto subsecs = detail::fmt_duration_cast( + epoch - detail::fmt_duration_cast(epoch)); + + return formatter::do_format(localtime(val), ctx, &subsecs); + } + + return formatter::format(localtime(val), ctx); + } +}; +#endif + +#if FMT_USE_UTC_TIME +template +struct formatter, + Char> + : formatter, + Char> { + template + auto format(std::chrono::time_point val, + FormatContext& ctx) const -> decltype(ctx.out()) { + return formatter< + std::chrono::time_point, + Char>::format(std::chrono::utc_clock::to_sys(val), ctx); + } +}; +#endif + +template struct formatter { + private: + format_specs specs_; + detail::arg_ref width_ref_; + + protected: + basic_string_view format_str_; + + template + auto do_format(const std::tm& tm, FormatContext& ctx, + const Duration* subsecs) const -> decltype(ctx.out()) { + auto specs = specs_; + auto buf = basic_memory_buffer(); + auto out = std::back_inserter(buf); + detail::handle_dynamic_spec(specs.width, width_ref_, + ctx); + + auto loc_ref = ctx.locale(); + detail::get_locale loc(static_cast(loc_ref), loc_ref); + auto w = + detail::tm_writer(loc, out, tm, subsecs); + detail::parse_chrono_format(format_str_.begin(), format_str_.end(), w); + return detail::write( + ctx.out(), basic_string_view(buf.data(), buf.size()), specs); + } + + public: + FMT_CONSTEXPR auto parse(basic_format_parse_context& ctx) + -> decltype(ctx.begin()) { + auto it = ctx.begin(), end = ctx.end(); + if (it == end || *it == '}') return it; + + it = detail::parse_align(it, end, specs_); + if (it == end) return it; + + it = detail::parse_dynamic_spec(it, end, specs_.width, width_ref_, ctx); + if (it == end) return it; + + end = detail::parse_chrono_format(it, end, detail::tm_format_checker()); + // Replace the default format_str only if the new spec is not empty. + if (end != it) format_str_ = {it, detail::to_unsigned(end - it)}; + return end; + } + + template + auto format(const std::tm& tm, FormatContext& ctx) const + -> decltype(ctx.out()) { + return do_format(tm, ctx, nullptr); + } +}; + +FMT_END_EXPORT +FMT_END_NAMESPACE + +#endif // FMT_CHRONO_H_ diff --git a/c/vendor/fmt/include/fmt/color.h b/c/vendor/fmt/include/fmt/color.h new file mode 100644 index 0000000000..367849a86a --- /dev/null +++ b/c/vendor/fmt/include/fmt/color.h @@ -0,0 +1,643 @@ +// Formatting library for C++ - color support +// +// Copyright (c) 2018 - present, Victor Zverovich and fmt contributors +// All rights reserved. +// +// For the license information refer to format.h. + +#ifndef FMT_COLOR_H_ +#define FMT_COLOR_H_ + +#include "format.h" + +FMT_BEGIN_NAMESPACE +FMT_BEGIN_EXPORT + +enum class color : uint32_t { + alice_blue = 0xF0F8FF, // rgb(240,248,255) + antique_white = 0xFAEBD7, // rgb(250,235,215) + aqua = 0x00FFFF, // rgb(0,255,255) + aquamarine = 0x7FFFD4, // rgb(127,255,212) + azure = 0xF0FFFF, // rgb(240,255,255) + beige = 0xF5F5DC, // rgb(245,245,220) + bisque = 0xFFE4C4, // rgb(255,228,196) + black = 0x000000, // rgb(0,0,0) + blanched_almond = 0xFFEBCD, // rgb(255,235,205) + blue = 0x0000FF, // rgb(0,0,255) + blue_violet = 0x8A2BE2, // rgb(138,43,226) + brown = 0xA52A2A, // rgb(165,42,42) + burly_wood = 0xDEB887, // rgb(222,184,135) + cadet_blue = 0x5F9EA0, // rgb(95,158,160) + chartreuse = 0x7FFF00, // rgb(127,255,0) + chocolate = 0xD2691E, // rgb(210,105,30) + coral = 0xFF7F50, // rgb(255,127,80) + cornflower_blue = 0x6495ED, // rgb(100,149,237) + cornsilk = 0xFFF8DC, // rgb(255,248,220) + crimson = 0xDC143C, // rgb(220,20,60) + cyan = 0x00FFFF, // rgb(0,255,255) + dark_blue = 0x00008B, // rgb(0,0,139) + dark_cyan = 0x008B8B, // rgb(0,139,139) + dark_golden_rod = 0xB8860B, // rgb(184,134,11) + dark_gray = 0xA9A9A9, // rgb(169,169,169) + dark_green = 0x006400, // rgb(0,100,0) + dark_khaki = 0xBDB76B, // rgb(189,183,107) + dark_magenta = 0x8B008B, // rgb(139,0,139) + dark_olive_green = 0x556B2F, // rgb(85,107,47) + dark_orange = 0xFF8C00, // rgb(255,140,0) + dark_orchid = 0x9932CC, // rgb(153,50,204) + dark_red = 0x8B0000, // rgb(139,0,0) + dark_salmon = 0xE9967A, // rgb(233,150,122) + dark_sea_green = 0x8FBC8F, // rgb(143,188,143) + dark_slate_blue = 0x483D8B, // rgb(72,61,139) + dark_slate_gray = 0x2F4F4F, // rgb(47,79,79) + dark_turquoise = 0x00CED1, // rgb(0,206,209) + dark_violet = 0x9400D3, // rgb(148,0,211) + deep_pink = 0xFF1493, // rgb(255,20,147) + deep_sky_blue = 0x00BFFF, // rgb(0,191,255) + dim_gray = 0x696969, // rgb(105,105,105) + dodger_blue = 0x1E90FF, // rgb(30,144,255) + fire_brick = 0xB22222, // rgb(178,34,34) + floral_white = 0xFFFAF0, // rgb(255,250,240) + forest_green = 0x228B22, // rgb(34,139,34) + fuchsia = 0xFF00FF, // rgb(255,0,255) + gainsboro = 0xDCDCDC, // rgb(220,220,220) + ghost_white = 0xF8F8FF, // rgb(248,248,255) + gold = 0xFFD700, // rgb(255,215,0) + golden_rod = 0xDAA520, // rgb(218,165,32) + gray = 0x808080, // rgb(128,128,128) + green = 0x008000, // rgb(0,128,0) + green_yellow = 0xADFF2F, // rgb(173,255,47) + honey_dew = 0xF0FFF0, // rgb(240,255,240) + hot_pink = 0xFF69B4, // rgb(255,105,180) + indian_red = 0xCD5C5C, // rgb(205,92,92) + indigo = 0x4B0082, // rgb(75,0,130) + ivory = 0xFFFFF0, // rgb(255,255,240) + khaki = 0xF0E68C, // rgb(240,230,140) + lavender = 0xE6E6FA, // rgb(230,230,250) + lavender_blush = 0xFFF0F5, // rgb(255,240,245) + lawn_green = 0x7CFC00, // rgb(124,252,0) + lemon_chiffon = 0xFFFACD, // rgb(255,250,205) + light_blue = 0xADD8E6, // rgb(173,216,230) + light_coral = 0xF08080, // rgb(240,128,128) + light_cyan = 0xE0FFFF, // rgb(224,255,255) + light_golden_rod_yellow = 0xFAFAD2, // rgb(250,250,210) + light_gray = 0xD3D3D3, // rgb(211,211,211) + light_green = 0x90EE90, // rgb(144,238,144) + light_pink = 0xFFB6C1, // rgb(255,182,193) + light_salmon = 0xFFA07A, // rgb(255,160,122) + light_sea_green = 0x20B2AA, // rgb(32,178,170) + light_sky_blue = 0x87CEFA, // rgb(135,206,250) + light_slate_gray = 0x778899, // rgb(119,136,153) + light_steel_blue = 0xB0C4DE, // rgb(176,196,222) + light_yellow = 0xFFFFE0, // rgb(255,255,224) + lime = 0x00FF00, // rgb(0,255,0) + lime_green = 0x32CD32, // rgb(50,205,50) + linen = 0xFAF0E6, // rgb(250,240,230) + magenta = 0xFF00FF, // rgb(255,0,255) + maroon = 0x800000, // rgb(128,0,0) + medium_aquamarine = 0x66CDAA, // rgb(102,205,170) + medium_blue = 0x0000CD, // rgb(0,0,205) + medium_orchid = 0xBA55D3, // rgb(186,85,211) + medium_purple = 0x9370DB, // rgb(147,112,219) + medium_sea_green = 0x3CB371, // rgb(60,179,113) + medium_slate_blue = 0x7B68EE, // rgb(123,104,238) + medium_spring_green = 0x00FA9A, // rgb(0,250,154) + medium_turquoise = 0x48D1CC, // rgb(72,209,204) + medium_violet_red = 0xC71585, // rgb(199,21,133) + midnight_blue = 0x191970, // rgb(25,25,112) + mint_cream = 0xF5FFFA, // rgb(245,255,250) + misty_rose = 0xFFE4E1, // rgb(255,228,225) + moccasin = 0xFFE4B5, // rgb(255,228,181) + navajo_white = 0xFFDEAD, // rgb(255,222,173) + navy = 0x000080, // rgb(0,0,128) + old_lace = 0xFDF5E6, // rgb(253,245,230) + olive = 0x808000, // rgb(128,128,0) + olive_drab = 0x6B8E23, // rgb(107,142,35) + orange = 0xFFA500, // rgb(255,165,0) + orange_red = 0xFF4500, // rgb(255,69,0) + orchid = 0xDA70D6, // rgb(218,112,214) + pale_golden_rod = 0xEEE8AA, // rgb(238,232,170) + pale_green = 0x98FB98, // rgb(152,251,152) + pale_turquoise = 0xAFEEEE, // rgb(175,238,238) + pale_violet_red = 0xDB7093, // rgb(219,112,147) + papaya_whip = 0xFFEFD5, // rgb(255,239,213) + peach_puff = 0xFFDAB9, // rgb(255,218,185) + peru = 0xCD853F, // rgb(205,133,63) + pink = 0xFFC0CB, // rgb(255,192,203) + plum = 0xDDA0DD, // rgb(221,160,221) + powder_blue = 0xB0E0E6, // rgb(176,224,230) + purple = 0x800080, // rgb(128,0,128) + rebecca_purple = 0x663399, // rgb(102,51,153) + red = 0xFF0000, // rgb(255,0,0) + rosy_brown = 0xBC8F8F, // rgb(188,143,143) + royal_blue = 0x4169E1, // rgb(65,105,225) + saddle_brown = 0x8B4513, // rgb(139,69,19) + salmon = 0xFA8072, // rgb(250,128,114) + sandy_brown = 0xF4A460, // rgb(244,164,96) + sea_green = 0x2E8B57, // rgb(46,139,87) + sea_shell = 0xFFF5EE, // rgb(255,245,238) + sienna = 0xA0522D, // rgb(160,82,45) + silver = 0xC0C0C0, // rgb(192,192,192) + sky_blue = 0x87CEEB, // rgb(135,206,235) + slate_blue = 0x6A5ACD, // rgb(106,90,205) + slate_gray = 0x708090, // rgb(112,128,144) + snow = 0xFFFAFA, // rgb(255,250,250) + spring_green = 0x00FF7F, // rgb(0,255,127) + steel_blue = 0x4682B4, // rgb(70,130,180) + tan = 0xD2B48C, // rgb(210,180,140) + teal = 0x008080, // rgb(0,128,128) + thistle = 0xD8BFD8, // rgb(216,191,216) + tomato = 0xFF6347, // rgb(255,99,71) + turquoise = 0x40E0D0, // rgb(64,224,208) + violet = 0xEE82EE, // rgb(238,130,238) + wheat = 0xF5DEB3, // rgb(245,222,179) + white = 0xFFFFFF, // rgb(255,255,255) + white_smoke = 0xF5F5F5, // rgb(245,245,245) + yellow = 0xFFFF00, // rgb(255,255,0) + yellow_green = 0x9ACD32 // rgb(154,205,50) +}; // enum class color + +enum class terminal_color : uint8_t { + black = 30, + red, + green, + yellow, + blue, + magenta, + cyan, + white, + bright_black = 90, + bright_red, + bright_green, + bright_yellow, + bright_blue, + bright_magenta, + bright_cyan, + bright_white +}; + +enum class emphasis : uint8_t { + bold = 1, + faint = 1 << 1, + italic = 1 << 2, + underline = 1 << 3, + blink = 1 << 4, + reverse = 1 << 5, + conceal = 1 << 6, + strikethrough = 1 << 7, +}; + +// rgb is a struct for red, green and blue colors. +// Using the name "rgb" makes some editors show the color in a tooltip. +struct rgb { + FMT_CONSTEXPR rgb() : r(0), g(0), b(0) {} + FMT_CONSTEXPR rgb(uint8_t r_, uint8_t g_, uint8_t b_) : r(r_), g(g_), b(b_) {} + FMT_CONSTEXPR rgb(uint32_t hex) + : r((hex >> 16) & 0xFF), g((hex >> 8) & 0xFF), b(hex & 0xFF) {} + FMT_CONSTEXPR rgb(color hex) + : r((uint32_t(hex) >> 16) & 0xFF), + g((uint32_t(hex) >> 8) & 0xFF), + b(uint32_t(hex) & 0xFF) {} + uint8_t r; + uint8_t g; + uint8_t b; +}; + +namespace detail { + +// color is a struct of either a rgb color or a terminal color. +struct color_type { + FMT_CONSTEXPR color_type() noexcept : is_rgb(), value{} {} + FMT_CONSTEXPR color_type(color rgb_color) noexcept : is_rgb(true), value{} { + value.rgb_color = static_cast(rgb_color); + } + FMT_CONSTEXPR color_type(rgb rgb_color) noexcept : is_rgb(true), value{} { + value.rgb_color = (static_cast(rgb_color.r) << 16) | + (static_cast(rgb_color.g) << 8) | rgb_color.b; + } + FMT_CONSTEXPR color_type(terminal_color term_color) noexcept + : is_rgb(), value{} { + value.term_color = static_cast(term_color); + } + bool is_rgb; + union color_union { + uint8_t term_color; + uint32_t rgb_color; + } value; +}; +} // namespace detail + +/** A text style consisting of foreground and background colors and emphasis. */ +class text_style { + public: + FMT_CONSTEXPR text_style(emphasis em = emphasis()) noexcept + : set_foreground_color(), set_background_color(), ems(em) {} + + FMT_CONSTEXPR auto operator|=(const text_style& rhs) -> text_style& { + if (!set_foreground_color) { + set_foreground_color = rhs.set_foreground_color; + foreground_color = rhs.foreground_color; + } else if (rhs.set_foreground_color) { + if (!foreground_color.is_rgb || !rhs.foreground_color.is_rgb) + FMT_THROW(format_error("can't OR a terminal color")); + foreground_color.value.rgb_color |= rhs.foreground_color.value.rgb_color; + } + + if (!set_background_color) { + set_background_color = rhs.set_background_color; + background_color = rhs.background_color; + } else if (rhs.set_background_color) { + if (!background_color.is_rgb || !rhs.background_color.is_rgb) + FMT_THROW(format_error("can't OR a terminal color")); + background_color.value.rgb_color |= rhs.background_color.value.rgb_color; + } + + ems = static_cast(static_cast(ems) | + static_cast(rhs.ems)); + return *this; + } + + friend FMT_CONSTEXPR auto operator|(text_style lhs, const text_style& rhs) + -> text_style { + return lhs |= rhs; + } + + FMT_CONSTEXPR auto has_foreground() const noexcept -> bool { + return set_foreground_color; + } + FMT_CONSTEXPR auto has_background() const noexcept -> bool { + return set_background_color; + } + FMT_CONSTEXPR auto has_emphasis() const noexcept -> bool { + return static_cast(ems) != 0; + } + FMT_CONSTEXPR auto get_foreground() const noexcept -> detail::color_type { + FMT_ASSERT(has_foreground(), "no foreground specified for this style"); + return foreground_color; + } + FMT_CONSTEXPR auto get_background() const noexcept -> detail::color_type { + FMT_ASSERT(has_background(), "no background specified for this style"); + return background_color; + } + FMT_CONSTEXPR auto get_emphasis() const noexcept -> emphasis { + FMT_ASSERT(has_emphasis(), "no emphasis specified for this style"); + return ems; + } + + private: + FMT_CONSTEXPR text_style(bool is_foreground, + detail::color_type text_color) noexcept + : set_foreground_color(), set_background_color(), ems() { + if (is_foreground) { + foreground_color = text_color; + set_foreground_color = true; + } else { + background_color = text_color; + set_background_color = true; + } + } + + friend FMT_CONSTEXPR auto fg(detail::color_type foreground) noexcept + -> text_style; + + friend FMT_CONSTEXPR auto bg(detail::color_type background) noexcept + -> text_style; + + detail::color_type foreground_color; + detail::color_type background_color; + bool set_foreground_color; + bool set_background_color; + emphasis ems; +}; + +/** Creates a text style from the foreground (text) color. */ +FMT_CONSTEXPR inline auto fg(detail::color_type foreground) noexcept + -> text_style { + return text_style(true, foreground); +} + +/** Creates a text style from the background color. */ +FMT_CONSTEXPR inline auto bg(detail::color_type background) noexcept + -> text_style { + return text_style(false, background); +} + +FMT_CONSTEXPR inline auto operator|(emphasis lhs, emphasis rhs) noexcept + -> text_style { + return text_style(lhs) | rhs; +} + +namespace detail { + +template struct ansi_color_escape { + FMT_CONSTEXPR ansi_color_escape(detail::color_type text_color, + const char* esc) noexcept { + // If we have a terminal color, we need to output another escape code + // sequence. + if (!text_color.is_rgb) { + bool is_background = esc == string_view("\x1b[48;2;"); + uint32_t value = text_color.value.term_color; + // Background ASCII codes are the same as the foreground ones but with + // 10 more. + if (is_background) value += 10u; + + size_t index = 0; + buffer[index++] = static_cast('\x1b'); + buffer[index++] = static_cast('['); + + if (value >= 100u) { + buffer[index++] = static_cast('1'); + value %= 100u; + } + buffer[index++] = static_cast('0' + value / 10u); + buffer[index++] = static_cast('0' + value % 10u); + + buffer[index++] = static_cast('m'); + buffer[index++] = static_cast('\0'); + return; + } + + for (int i = 0; i < 7; i++) { + buffer[i] = static_cast(esc[i]); + } + rgb color(text_color.value.rgb_color); + to_esc(color.r, buffer + 7, ';'); + to_esc(color.g, buffer + 11, ';'); + to_esc(color.b, buffer + 15, 'm'); + buffer[19] = static_cast(0); + } + FMT_CONSTEXPR ansi_color_escape(emphasis em) noexcept { + uint8_t em_codes[num_emphases] = {}; + if (has_emphasis(em, emphasis::bold)) em_codes[0] = 1; + if (has_emphasis(em, emphasis::faint)) em_codes[1] = 2; + if (has_emphasis(em, emphasis::italic)) em_codes[2] = 3; + if (has_emphasis(em, emphasis::underline)) em_codes[3] = 4; + if (has_emphasis(em, emphasis::blink)) em_codes[4] = 5; + if (has_emphasis(em, emphasis::reverse)) em_codes[5] = 7; + if (has_emphasis(em, emphasis::conceal)) em_codes[6] = 8; + if (has_emphasis(em, emphasis::strikethrough)) em_codes[7] = 9; + + size_t index = 0; + for (size_t i = 0; i < num_emphases; ++i) { + if (!em_codes[i]) continue; + buffer[index++] = static_cast('\x1b'); + buffer[index++] = static_cast('['); + buffer[index++] = static_cast('0' + em_codes[i]); + buffer[index++] = static_cast('m'); + } + buffer[index++] = static_cast(0); + } + FMT_CONSTEXPR operator const Char*() const noexcept { return buffer; } + + FMT_CONSTEXPR auto begin() const noexcept -> const Char* { return buffer; } + FMT_CONSTEXPR_CHAR_TRAITS auto end() const noexcept -> const Char* { + return buffer + std::char_traits::length(buffer); + } + + private: + static constexpr size_t num_emphases = 8; + Char buffer[7u + 3u * num_emphases + 1u]; + + static FMT_CONSTEXPR void to_esc(uint8_t c, Char* out, + char delimiter) noexcept { + out[0] = static_cast('0' + c / 100); + out[1] = static_cast('0' + c / 10 % 10); + out[2] = static_cast('0' + c % 10); + out[3] = static_cast(delimiter); + } + static FMT_CONSTEXPR auto has_emphasis(emphasis em, emphasis mask) noexcept + -> bool { + return static_cast(em) & static_cast(mask); + } +}; + +template +FMT_CONSTEXPR auto make_foreground_color(detail::color_type foreground) noexcept + -> ansi_color_escape { + return ansi_color_escape(foreground, "\x1b[38;2;"); +} + +template +FMT_CONSTEXPR auto make_background_color(detail::color_type background) noexcept + -> ansi_color_escape { + return ansi_color_escape(background, "\x1b[48;2;"); +} + +template +FMT_CONSTEXPR auto make_emphasis(emphasis em) noexcept + -> ansi_color_escape { + return ansi_color_escape(em); +} + +template inline void reset_color(buffer& buffer) { + auto reset_color = string_view("\x1b[0m"); + buffer.append(reset_color.begin(), reset_color.end()); +} + +template struct styled_arg : detail::view { + const T& value; + text_style style; + styled_arg(const T& v, text_style s) : value(v), style(s) {} +}; + +template +void vformat_to(buffer& buf, const text_style& ts, + basic_string_view format_str, + basic_format_args>> args) { + bool has_style = false; + if (ts.has_emphasis()) { + has_style = true; + auto emphasis = detail::make_emphasis(ts.get_emphasis()); + buf.append(emphasis.begin(), emphasis.end()); + } + if (ts.has_foreground()) { + has_style = true; + auto foreground = detail::make_foreground_color(ts.get_foreground()); + buf.append(foreground.begin(), foreground.end()); + } + if (ts.has_background()) { + has_style = true; + auto background = detail::make_background_color(ts.get_background()); + buf.append(background.begin(), background.end()); + } + detail::vformat_to(buf, format_str, args, {}); + if (has_style) detail::reset_color(buf); +} + +} // namespace detail + +inline void vprint(std::FILE* f, const text_style& ts, string_view fmt, + format_args args) { + // Legacy wide streams are not supported. + auto buf = memory_buffer(); + detail::vformat_to(buf, ts, fmt, args); + if (detail::is_utf8()) { + detail::print(f, string_view(buf.begin(), buf.size())); + return; + } + buf.push_back('\0'); + int result = std::fputs(buf.data(), f); + if (result < 0) + FMT_THROW(system_error(errno, FMT_STRING("cannot write to file"))); +} + +/** + \rst + Formats a string and prints it to the specified file stream using ANSI + escape sequences to specify text formatting. + + **Example**:: + + fmt::print(fmt::emphasis::bold | fg(fmt::color::red), + "Elapsed time: {0:.2f} seconds", 1.23); + \endrst + */ +template ::value)> +void print(std::FILE* f, const text_style& ts, const S& format_str, + const Args&... args) { + vprint(f, ts, format_str, + fmt::make_format_args>>(args...)); +} + +/** + \rst + Formats a string and prints it to stdout using ANSI escape sequences to + specify text formatting. + + **Example**:: + + fmt::print(fmt::emphasis::bold | fg(fmt::color::red), + "Elapsed time: {0:.2f} seconds", 1.23); + \endrst + */ +template ::value)> +void print(const text_style& ts, const S& format_str, const Args&... args) { + return print(stdout, ts, format_str, args...); +} + +template > +inline auto vformat( + const text_style& ts, const S& format_str, + basic_format_args>> args) + -> std::basic_string { + basic_memory_buffer buf; + detail::vformat_to(buf, ts, detail::to_string_view(format_str), args); + return fmt::to_string(buf); +} + +/** + \rst + Formats arguments and returns the result as a string using ANSI + escape sequences to specify text formatting. + + **Example**:: + + #include + std::string message = fmt::format(fmt::emphasis::bold | fg(fmt::color::red), + "The answer is {}", 42); + \endrst +*/ +template > +inline auto format(const text_style& ts, const S& format_str, + const Args&... args) -> std::basic_string { + return fmt::vformat(ts, detail::to_string_view(format_str), + fmt::make_format_args>(args...)); +} + +/** + Formats a string with the given text_style and writes the output to ``out``. + */ +template ::value)> +auto vformat_to(OutputIt out, const text_style& ts, + basic_string_view format_str, + basic_format_args>> args) + -> OutputIt { + auto&& buf = detail::get_buffer(out); + detail::vformat_to(buf, ts, format_str, args); + return detail::get_iterator(buf, out); +} + +/** + \rst + Formats arguments with the given text_style, writes the result to the output + iterator ``out`` and returns the iterator past the end of the output range. + + **Example**:: + + std::vector out; + fmt::format_to(std::back_inserter(out), + fmt::emphasis::bold | fg(fmt::color::red), "{}", 42); + \endrst +*/ +template < + typename OutputIt, typename S, typename... Args, + bool enable = detail::is_output_iterator>::value && + detail::is_string::value> +inline auto format_to(OutputIt out, const text_style& ts, const S& format_str, + Args&&... args) -> + typename std::enable_if::type { + return vformat_to(out, ts, detail::to_string_view(format_str), + fmt::make_format_args>>(args...)); +} + +template +struct formatter, Char> : formatter { + template + auto format(const detail::styled_arg& arg, FormatContext& ctx) const + -> decltype(ctx.out()) { + const auto& ts = arg.style; + const auto& value = arg.value; + auto out = ctx.out(); + + bool has_style = false; + if (ts.has_emphasis()) { + has_style = true; + auto emphasis = detail::make_emphasis(ts.get_emphasis()); + out = std::copy(emphasis.begin(), emphasis.end(), out); + } + if (ts.has_foreground()) { + has_style = true; + auto foreground = + detail::make_foreground_color(ts.get_foreground()); + out = std::copy(foreground.begin(), foreground.end(), out); + } + if (ts.has_background()) { + has_style = true; + auto background = + detail::make_background_color(ts.get_background()); + out = std::copy(background.begin(), background.end(), out); + } + out = formatter::format(value, ctx); + if (has_style) { + auto reset_color = string_view("\x1b[0m"); + out = std::copy(reset_color.begin(), reset_color.end(), out); + } + return out; + } +}; + +/** + \rst + Returns an argument that will be formatted using ANSI escape sequences, + to be used in a formatting function. + + **Example**:: + + fmt::print("Elapsed time: {0:.2f} seconds", + fmt::styled(1.23, fmt::fg(fmt::color::green) | + fmt::bg(fmt::color::blue))); + \endrst + */ +template +FMT_CONSTEXPR auto styled(const T& value, text_style ts) + -> detail::styled_arg> { + return detail::styled_arg>{value, ts}; +} + +FMT_END_EXPORT +FMT_END_NAMESPACE + +#endif // FMT_COLOR_H_ diff --git a/c/vendor/fmt/include/fmt/compile.h b/c/vendor/fmt/include/fmt/compile.h new file mode 100644 index 0000000000..3b3f166e0c --- /dev/null +++ b/c/vendor/fmt/include/fmt/compile.h @@ -0,0 +1,535 @@ +// Formatting library for C++ - experimental format string compilation +// +// Copyright (c) 2012 - present, Victor Zverovich and fmt contributors +// All rights reserved. +// +// For the license information refer to format.h. + +#ifndef FMT_COMPILE_H_ +#define FMT_COMPILE_H_ + +#include "format.h" + +FMT_BEGIN_NAMESPACE +namespace detail { + +template +FMT_CONSTEXPR inline auto copy_str(InputIt begin, InputIt end, + counting_iterator it) -> counting_iterator { + return it + (end - begin); +} + +// A compile-time string which is compiled into fast formatting code. +class compiled_string {}; + +template +struct is_compiled_string : std::is_base_of {}; + +/** + \rst + Converts a string literal *s* into a format string that will be parsed at + compile time and converted into efficient formatting code. Requires C++17 + ``constexpr if`` compiler support. + + **Example**:: + + // Converts 42 into std::string using the most efficient method and no + // runtime format string processing. + std::string s = fmt::format(FMT_COMPILE("{}"), 42); + \endrst + */ +#if defined(__cpp_if_constexpr) && defined(__cpp_return_type_deduction) +# define FMT_COMPILE(s) \ + FMT_STRING_IMPL(s, fmt::detail::compiled_string, explicit) +#else +# define FMT_COMPILE(s) FMT_STRING(s) +#endif + +#if FMT_USE_NONTYPE_TEMPLATE_ARGS +template Str> +struct udl_compiled_string : compiled_string { + using char_type = Char; + explicit constexpr operator basic_string_view() const { + return {Str.data, N - 1}; + } +}; +#endif + +template +auto first(const T& value, const Tail&...) -> const T& { + return value; +} + +#if defined(__cpp_if_constexpr) && defined(__cpp_return_type_deduction) +template struct type_list {}; + +// Returns a reference to the argument at index N from [first, rest...]. +template +constexpr const auto& get([[maybe_unused]] const T& first, + [[maybe_unused]] const Args&... rest) { + static_assert(N < 1 + sizeof...(Args), "index is out of bounds"); + if constexpr (N == 0) + return first; + else + return detail::get(rest...); +} + +template +constexpr int get_arg_index_by_name(basic_string_view name, + type_list) { + return get_arg_index_by_name(name); +} + +template struct get_type_impl; + +template struct get_type_impl> { + using type = + remove_cvref_t(std::declval()...))>; +}; + +template +using get_type = typename get_type_impl::type; + +template struct is_compiled_format : std::false_type {}; + +template struct text { + basic_string_view data; + using char_type = Char; + + template + constexpr OutputIt format(OutputIt out, const Args&...) const { + return write(out, data); + } +}; + +template +struct is_compiled_format> : std::true_type {}; + +template +constexpr text make_text(basic_string_view s, size_t pos, + size_t size) { + return {{&s[pos], size}}; +} + +template struct code_unit { + Char value; + using char_type = Char; + + template + constexpr OutputIt format(OutputIt out, const Args&...) const { + *out++ = value; + return out; + } +}; + +// This ensures that the argument type is convertible to `const T&`. +template +constexpr const T& get_arg_checked(const Args&... args) { + const auto& arg = detail::get(args...); + if constexpr (detail::is_named_arg>()) { + return arg.value; + } else { + return arg; + } +} + +template +struct is_compiled_format> : std::true_type {}; + +// A replacement field that refers to argument N. +template struct field { + using char_type = Char; + + template + constexpr OutputIt format(OutputIt out, const Args&... args) const { + const T& arg = get_arg_checked(args...); + if constexpr (std::is_convertible_v>) { + auto s = basic_string_view(arg); + return copy_str(s.begin(), s.end(), out); + } + return write(out, arg); + } +}; + +template +struct is_compiled_format> : std::true_type {}; + +// A replacement field that refers to argument with name. +template struct runtime_named_field { + using char_type = Char; + basic_string_view name; + + template + constexpr static bool try_format_argument( + OutputIt& out, + // [[maybe_unused]] due to unused-but-set-parameter warning in GCC 7,8,9 + [[maybe_unused]] basic_string_view arg_name, const T& arg) { + if constexpr (is_named_arg::type>::value) { + if (arg_name == arg.name) { + out = write(out, arg.value); + return true; + } + } + return false; + } + + template + constexpr OutputIt format(OutputIt out, const Args&... args) const { + bool found = (try_format_argument(out, name, args) || ...); + if (!found) { + FMT_THROW(format_error("argument with specified name is not found")); + } + return out; + } +}; + +template +struct is_compiled_format> : std::true_type {}; + +// A replacement field that refers to argument N and has format specifiers. +template struct spec_field { + using char_type = Char; + formatter fmt; + + template + constexpr FMT_INLINE OutputIt format(OutputIt out, + const Args&... args) const { + const auto& vargs = + fmt::make_format_args>(args...); + basic_format_context ctx(out, vargs); + return fmt.format(get_arg_checked(args...), ctx); + } +}; + +template +struct is_compiled_format> : std::true_type {}; + +template struct concat { + L lhs; + R rhs; + using char_type = typename L::char_type; + + template + constexpr OutputIt format(OutputIt out, const Args&... args) const { + out = lhs.format(out, args...); + return rhs.format(out, args...); + } +}; + +template +struct is_compiled_format> : std::true_type {}; + +template +constexpr concat make_concat(L lhs, R rhs) { + return {lhs, rhs}; +} + +struct unknown_format {}; + +template +constexpr size_t parse_text(basic_string_view str, size_t pos) { + for (size_t size = str.size(); pos != size; ++pos) { + if (str[pos] == '{' || str[pos] == '}') break; + } + return pos; +} + +template +constexpr auto compile_format_string(S format_str); + +template +constexpr auto parse_tail(T head, S format_str) { + if constexpr (POS != + basic_string_view(format_str).size()) { + constexpr auto tail = compile_format_string(format_str); + if constexpr (std::is_same, + unknown_format>()) + return tail; + else + return make_concat(head, tail); + } else { + return head; + } +} + +template struct parse_specs_result { + formatter fmt; + size_t end; + int next_arg_id; +}; + +enum { manual_indexing_id = -1 }; + +template +constexpr parse_specs_result parse_specs(basic_string_view str, + size_t pos, int next_arg_id) { + str.remove_prefix(pos); + auto ctx = + compile_parse_context(str, max_value(), nullptr, next_arg_id); + auto f = formatter(); + auto end = f.parse(ctx); + return {f, pos + fmt::detail::to_unsigned(end - str.data()), + next_arg_id == 0 ? manual_indexing_id : ctx.next_arg_id()}; +} + +template struct arg_id_handler { + arg_ref arg_id; + + constexpr int on_auto() { + FMT_ASSERT(false, "handler cannot be used with automatic indexing"); + return 0; + } + constexpr int on_index(int id) { + arg_id = arg_ref(id); + return 0; + } + constexpr int on_name(basic_string_view id) { + arg_id = arg_ref(id); + return 0; + } +}; + +template struct parse_arg_id_result { + arg_ref arg_id; + const Char* arg_id_end; +}; + +template +constexpr auto parse_arg_id(const Char* begin, const Char* end) { + auto handler = arg_id_handler{arg_ref{}}; + auto arg_id_end = parse_arg_id(begin, end, handler); + return parse_arg_id_result{handler.arg_id, arg_id_end}; +} + +template struct field_type { + using type = remove_cvref_t; +}; + +template +struct field_type::value>> { + using type = remove_cvref_t; +}; + +template +constexpr auto parse_replacement_field_then_tail(S format_str) { + using char_type = typename S::char_type; + constexpr auto str = basic_string_view(format_str); + constexpr char_type c = END_POS != str.size() ? str[END_POS] : char_type(); + if constexpr (c == '}') { + return parse_tail( + field::type, ARG_INDEX>(), + format_str); + } else if constexpr (c != ':') { + FMT_THROW(format_error("expected ':'")); + } else { + constexpr auto result = parse_specs::type>( + str, END_POS + 1, NEXT_ID == manual_indexing_id ? 0 : NEXT_ID); + if constexpr (result.end >= str.size() || str[result.end] != '}') { + FMT_THROW(format_error("expected '}'")); + return 0; + } else { + return parse_tail( + spec_field::type, ARG_INDEX>{ + result.fmt}, + format_str); + } + } +} + +// Compiles a non-empty format string and returns the compiled representation +// or unknown_format() on unrecognized input. +template +constexpr auto compile_format_string(S format_str) { + using char_type = typename S::char_type; + constexpr auto str = basic_string_view(format_str); + if constexpr (str[POS] == '{') { + if constexpr (POS + 1 == str.size()) + FMT_THROW(format_error("unmatched '{' in format string")); + if constexpr (str[POS + 1] == '{') { + return parse_tail(make_text(str, POS, 1), format_str); + } else if constexpr (str[POS + 1] == '}' || str[POS + 1] == ':') { + static_assert(ID != manual_indexing_id, + "cannot switch from manual to automatic argument indexing"); + constexpr auto next_id = + ID != manual_indexing_id ? ID + 1 : manual_indexing_id; + return parse_replacement_field_then_tail, Args, + POS + 1, ID, next_id>( + format_str); + } else { + constexpr auto arg_id_result = + parse_arg_id(str.data() + POS + 1, str.data() + str.size()); + constexpr auto arg_id_end_pos = arg_id_result.arg_id_end - str.data(); + constexpr char_type c = + arg_id_end_pos != str.size() ? str[arg_id_end_pos] : char_type(); + static_assert(c == '}' || c == ':', "missing '}' in format string"); + if constexpr (arg_id_result.arg_id.kind == arg_id_kind::index) { + static_assert( + ID == manual_indexing_id || ID == 0, + "cannot switch from automatic to manual argument indexing"); + constexpr auto arg_index = arg_id_result.arg_id.val.index; + return parse_replacement_field_then_tail, + Args, arg_id_end_pos, + arg_index, manual_indexing_id>( + format_str); + } else if constexpr (arg_id_result.arg_id.kind == arg_id_kind::name) { + constexpr auto arg_index = + get_arg_index_by_name(arg_id_result.arg_id.val.name, Args{}); + if constexpr (arg_index >= 0) { + constexpr auto next_id = + ID != manual_indexing_id ? ID + 1 : manual_indexing_id; + return parse_replacement_field_then_tail< + decltype(get_type::value), Args, arg_id_end_pos, + arg_index, next_id>(format_str); + } else if constexpr (c == '}') { + return parse_tail( + runtime_named_field{arg_id_result.arg_id.val.name}, + format_str); + } else if constexpr (c == ':') { + return unknown_format(); // no type info for specs parsing + } + } + } + } else if constexpr (str[POS] == '}') { + if constexpr (POS + 1 == str.size()) + FMT_THROW(format_error("unmatched '}' in format string")); + return parse_tail(make_text(str, POS, 1), format_str); + } else { + constexpr auto end = parse_text(str, POS + 1); + if constexpr (end - POS > 1) { + return parse_tail(make_text(str, POS, end - POS), + format_str); + } else { + return parse_tail(code_unit{str[POS]}, + format_str); + } + } +} + +template ::value)> +constexpr auto compile(S format_str) { + constexpr auto str = basic_string_view(format_str); + if constexpr (str.size() == 0) { + return detail::make_text(str, 0, 0); + } else { + constexpr auto result = + detail::compile_format_string, 0, 0>( + format_str); + return result; + } +} +#endif // defined(__cpp_if_constexpr) && defined(__cpp_return_type_deduction) +} // namespace detail + +FMT_BEGIN_EXPORT + +#if defined(__cpp_if_constexpr) && defined(__cpp_return_type_deduction) + +template ::value)> +FMT_INLINE std::basic_string format(const CompiledFormat& cf, + const Args&... args) { + auto s = std::basic_string(); + cf.format(std::back_inserter(s), args...); + return s; +} + +template ::value)> +constexpr FMT_INLINE OutputIt format_to(OutputIt out, const CompiledFormat& cf, + const Args&... args) { + return cf.format(out, args...); +} + +template ::value)> +FMT_INLINE std::basic_string format(const S&, + Args&&... args) { + if constexpr (std::is_same::value) { + constexpr auto str = basic_string_view(S()); + if constexpr (str.size() == 2 && str[0] == '{' && str[1] == '}') { + const auto& first = detail::first(args...); + if constexpr (detail::is_named_arg< + remove_cvref_t>::value) { + return fmt::to_string(first.value); + } else { + return fmt::to_string(first); + } + } + } + constexpr auto compiled = detail::compile(S()); + if constexpr (std::is_same, + detail::unknown_format>()) { + return fmt::format( + static_cast>(S()), + std::forward(args)...); + } else { + return fmt::format(compiled, std::forward(args)...); + } +} + +template ::value)> +FMT_CONSTEXPR OutputIt format_to(OutputIt out, const S&, Args&&... args) { + constexpr auto compiled = detail::compile(S()); + if constexpr (std::is_same, + detail::unknown_format>()) { + return fmt::format_to( + out, static_cast>(S()), + std::forward(args)...); + } else { + return fmt::format_to(out, compiled, std::forward(args)...); + } +} +#endif + +template ::value)> +auto format_to_n(OutputIt out, size_t n, const S& format_str, Args&&... args) + -> format_to_n_result { + using traits = detail::fixed_buffer_traits; + auto buf = detail::iterator_buffer(out, n); + fmt::format_to(std::back_inserter(buf), format_str, + std::forward(args)...); + return {buf.out(), buf.count()}; +} + +template ::value)> +FMT_CONSTEXPR20 auto formatted_size(const S& format_str, const Args&... args) + -> size_t { + return fmt::format_to(detail::counting_iterator(), format_str, args...) + .count(); +} + +template ::value)> +void print(std::FILE* f, const S& format_str, const Args&... args) { + memory_buffer buffer; + fmt::format_to(std::back_inserter(buffer), format_str, args...); + detail::print(f, {buffer.data(), buffer.size()}); +} + +template ::value)> +void print(const S& format_str, const Args&... args) { + print(stdout, format_str, args...); +} + +#if FMT_USE_NONTYPE_TEMPLATE_ARGS +inline namespace literals { +template constexpr auto operator""_cf() { + using char_t = remove_cvref_t; + return detail::udl_compiled_string(); +} +} // namespace literals +#endif + +FMT_END_EXPORT +FMT_END_NAMESPACE + +#endif // FMT_COMPILE_H_ diff --git a/c/vendor/fmt/include/fmt/core.h b/c/vendor/fmt/include/fmt/core.h new file mode 100644 index 0000000000..b51c1406a9 --- /dev/null +++ b/c/vendor/fmt/include/fmt/core.h @@ -0,0 +1,2969 @@ +// Formatting library for C++ - the core API for char/UTF-8 +// +// Copyright (c) 2012 - present, Victor Zverovich +// All rights reserved. +// +// For the license information refer to format.h. + +#ifndef FMT_CORE_H_ +#define FMT_CORE_H_ + +#include // std::byte +#include // std::FILE +#include // std::strlen +#include +#include +#include // std::addressof +#include +#include + +// The fmt library version in the form major * 10000 + minor * 100 + patch. +#define FMT_VERSION 100201 + +#if defined(__clang__) && !defined(__ibmxl__) +# define FMT_CLANG_VERSION (__clang_major__ * 100 + __clang_minor__) +#else +# define FMT_CLANG_VERSION 0 +#endif + +#if defined(__GNUC__) && !defined(__clang__) && !defined(__INTEL_COMPILER) && \ + !defined(__NVCOMPILER) +# define FMT_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__) +#else +# define FMT_GCC_VERSION 0 +#endif + +#ifndef FMT_GCC_PRAGMA +// Workaround _Pragma bug https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59884. +# if FMT_GCC_VERSION >= 504 +# define FMT_GCC_PRAGMA(arg) _Pragma(arg) +# else +# define FMT_GCC_PRAGMA(arg) +# endif +#endif + +#ifdef __ICL +# define FMT_ICC_VERSION __ICL +#elif defined(__INTEL_COMPILER) +# define FMT_ICC_VERSION __INTEL_COMPILER +#else +# define FMT_ICC_VERSION 0 +#endif + +#ifdef _MSC_VER +# define FMT_MSC_VERSION _MSC_VER +# define FMT_MSC_WARNING(...) __pragma(warning(__VA_ARGS__)) +#else +# define FMT_MSC_VERSION 0 +# define FMT_MSC_WARNING(...) +#endif + +#ifdef _MSVC_LANG +# define FMT_CPLUSPLUS _MSVC_LANG +#else +# define FMT_CPLUSPLUS __cplusplus +#endif + +#ifdef __has_feature +# define FMT_HAS_FEATURE(x) __has_feature(x) +#else +# define FMT_HAS_FEATURE(x) 0 +#endif + +#if defined(__has_include) || FMT_ICC_VERSION >= 1600 || FMT_MSC_VERSION > 1900 +# define FMT_HAS_INCLUDE(x) __has_include(x) +#else +# define FMT_HAS_INCLUDE(x) 0 +#endif + +#ifdef __has_cpp_attribute +# define FMT_HAS_CPP_ATTRIBUTE(x) __has_cpp_attribute(x) +#else +# define FMT_HAS_CPP_ATTRIBUTE(x) 0 +#endif + +#define FMT_HAS_CPP14_ATTRIBUTE(attribute) \ + (FMT_CPLUSPLUS >= 201402L && FMT_HAS_CPP_ATTRIBUTE(attribute)) + +#define FMT_HAS_CPP17_ATTRIBUTE(attribute) \ + (FMT_CPLUSPLUS >= 201703L && FMT_HAS_CPP_ATTRIBUTE(attribute)) + +// Check if relaxed C++14 constexpr is supported. +// GCC doesn't allow throw in constexpr until version 6 (bug 67371). +#ifndef FMT_USE_CONSTEXPR +# if (FMT_HAS_FEATURE(cxx_relaxed_constexpr) || FMT_MSC_VERSION >= 1912 || \ + (FMT_GCC_VERSION >= 600 && FMT_CPLUSPLUS >= 201402L)) && \ + !FMT_ICC_VERSION && (!defined(__NVCC__) || FMT_CPLUSPLUS >= 202002L) +# define FMT_USE_CONSTEXPR 1 +# else +# define FMT_USE_CONSTEXPR 0 +# endif +#endif +#if FMT_USE_CONSTEXPR +# define FMT_CONSTEXPR constexpr +#else +# define FMT_CONSTEXPR +#endif + +#if (FMT_CPLUSPLUS >= 202002L || \ + (FMT_CPLUSPLUS >= 201709L && FMT_GCC_VERSION >= 1002)) && \ + ((!defined(_GLIBCXX_RELEASE) || _GLIBCXX_RELEASE >= 10) && \ + (!defined(_LIBCPP_VERSION) || _LIBCPP_VERSION >= 10000) && \ + (!FMT_MSC_VERSION || FMT_MSC_VERSION >= 1928)) && \ + defined(__cpp_lib_is_constant_evaluated) +# define FMT_CONSTEXPR20 constexpr +#else +# define FMT_CONSTEXPR20 +#endif + +// Check if constexpr std::char_traits<>::{compare,length} are supported. +#if defined(__GLIBCXX__) +# if FMT_CPLUSPLUS >= 201703L && defined(_GLIBCXX_RELEASE) && \ + _GLIBCXX_RELEASE >= 7 // GCC 7+ libstdc++ has _GLIBCXX_RELEASE. +# define FMT_CONSTEXPR_CHAR_TRAITS constexpr +# endif +#elif defined(_LIBCPP_VERSION) && FMT_CPLUSPLUS >= 201703L && \ + _LIBCPP_VERSION >= 4000 +# define FMT_CONSTEXPR_CHAR_TRAITS constexpr +#elif FMT_MSC_VERSION >= 1914 && FMT_CPLUSPLUS >= 201703L +# define FMT_CONSTEXPR_CHAR_TRAITS constexpr +#endif +#ifndef FMT_CONSTEXPR_CHAR_TRAITS +# define FMT_CONSTEXPR_CHAR_TRAITS +#endif + +// Check if exceptions are disabled. +#ifndef FMT_EXCEPTIONS +# if (defined(__GNUC__) && !defined(__EXCEPTIONS)) || \ + (FMT_MSC_VERSION && !_HAS_EXCEPTIONS) +# define FMT_EXCEPTIONS 0 +# else +# define FMT_EXCEPTIONS 1 +# endif +#endif + +// Disable [[noreturn]] on MSVC/NVCC because of bogus unreachable code warnings. +#if FMT_EXCEPTIONS && FMT_HAS_CPP_ATTRIBUTE(noreturn) && !FMT_MSC_VERSION && \ + !defined(__NVCC__) +# define FMT_NORETURN [[noreturn]] +#else +# define FMT_NORETURN +#endif + +#ifndef FMT_NODISCARD +# if FMT_HAS_CPP17_ATTRIBUTE(nodiscard) +# define FMT_NODISCARD [[nodiscard]] +# else +# define FMT_NODISCARD +# endif +#endif + +#ifndef FMT_INLINE +# if FMT_GCC_VERSION || FMT_CLANG_VERSION +# define FMT_INLINE inline __attribute__((always_inline)) +# else +# define FMT_INLINE inline +# endif +#endif + +#ifdef _MSC_VER +# define FMT_UNCHECKED_ITERATOR(It) \ + using _Unchecked_type = It // Mark iterator as checked. +#else +# define FMT_UNCHECKED_ITERATOR(It) using unchecked_type = It +#endif + +#ifndef FMT_BEGIN_NAMESPACE +# define FMT_BEGIN_NAMESPACE \ + namespace fmt { \ + inline namespace v10 { +# define FMT_END_NAMESPACE \ + } \ + } +#endif + +#ifndef FMT_EXPORT +# define FMT_EXPORT +# define FMT_BEGIN_EXPORT +# define FMT_END_EXPORT +#endif + +#if FMT_GCC_VERSION || FMT_CLANG_VERSION +# define FMT_VISIBILITY(value) __attribute__((visibility(value))) +#else +# define FMT_VISIBILITY(value) +#endif + +#if !defined(FMT_HEADER_ONLY) && defined(_WIN32) +# if defined(FMT_LIB_EXPORT) +# define FMT_API __declspec(dllexport) +# elif defined(FMT_SHARED) +# define FMT_API __declspec(dllimport) +# endif +#elif defined(FMT_LIB_EXPORT) || defined(FMT_SHARED) +# define FMT_API FMT_VISIBILITY("default") +#endif +#ifndef FMT_API +# define FMT_API +#endif + +// libc++ supports string_view in pre-c++17. +#if FMT_HAS_INCLUDE() && \ + (FMT_CPLUSPLUS >= 201703L || defined(_LIBCPP_VERSION)) +# include +# define FMT_USE_STRING_VIEW +#elif FMT_HAS_INCLUDE("experimental/string_view") && FMT_CPLUSPLUS >= 201402L +# include +# define FMT_USE_EXPERIMENTAL_STRING_VIEW +#endif + +#ifndef FMT_UNICODE +# define FMT_UNICODE !FMT_MSC_VERSION +#endif + +#ifndef FMT_CONSTEVAL +# if ((FMT_GCC_VERSION >= 1000 || FMT_CLANG_VERSION >= 1101) && \ + (!defined(__apple_build_version__) || \ + __apple_build_version__ >= 14000029L) && \ + FMT_CPLUSPLUS >= 202002L) || \ + (defined(__cpp_consteval) && \ + (!FMT_MSC_VERSION || FMT_MSC_VERSION >= 1929)) +// consteval is broken in MSVC before VS2019 version 16.10 and Apple clang +// before 14. +# define FMT_CONSTEVAL consteval +# define FMT_HAS_CONSTEVAL +# else +# define FMT_CONSTEVAL +# endif +#endif + +#ifndef FMT_USE_NONTYPE_TEMPLATE_ARGS +# if defined(__cpp_nontype_template_args) && \ + ((FMT_GCC_VERSION >= 903 && FMT_CPLUSPLUS >= 201709L) || \ + __cpp_nontype_template_args >= 201911L) && \ + !defined(__NVCOMPILER) && !defined(__LCC__) +# define FMT_USE_NONTYPE_TEMPLATE_ARGS 1 +# else +# define FMT_USE_NONTYPE_TEMPLATE_ARGS 0 +# endif +#endif + +// GCC < 5 requires this-> in decltype +#ifndef FMT_DECLTYPE_THIS +# if FMT_GCC_VERSION && FMT_GCC_VERSION < 500 +# define FMT_DECLTYPE_THIS this-> +# else +# define FMT_DECLTYPE_THIS +# endif +#endif + +// Enable minimal optimizations for more compact code in debug mode. +FMT_GCC_PRAGMA("GCC push_options") +#if !defined(__OPTIMIZE__) && !defined(__NVCOMPILER) && !defined(__LCC__) && \ + !defined(__CUDACC__) +FMT_GCC_PRAGMA("GCC optimize(\"Og\")") +#endif + +FMT_BEGIN_NAMESPACE + +// Implementations of enable_if_t and other metafunctions for older systems. +template +using enable_if_t = typename std::enable_if::type; +template +using conditional_t = typename std::conditional::type; +template using bool_constant = std::integral_constant; +template +using remove_reference_t = typename std::remove_reference::type; +template +using remove_const_t = typename std::remove_const::type; +template +using remove_cvref_t = typename std::remove_cv>::type; +template struct type_identity { + using type = T; +}; +template using type_identity_t = typename type_identity::type; +template +using underlying_t = typename std::underlying_type::type; + +// Checks whether T is a container with contiguous storage. +template struct is_contiguous : std::false_type {}; +template +struct is_contiguous> : std::true_type {}; + +struct monostate { + constexpr monostate() {} +}; + +// An enable_if helper to be used in template parameters which results in much +// shorter symbols: https://godbolt.org/z/sWw4vP. Extra parentheses are needed +// to workaround a bug in MSVC 2019 (see #1140 and #1186). +#ifdef FMT_DOC +# define FMT_ENABLE_IF(...) +#else +# define FMT_ENABLE_IF(...) fmt::enable_if_t<(__VA_ARGS__), int> = 0 +#endif + +// This is defined in core.h instead of format.h to avoid injecting in std. +// It is a template to avoid undesirable implicit conversions to std::byte. +#ifdef __cpp_lib_byte +template ::value)> +inline auto format_as(T b) -> unsigned char { + return static_cast(b); +} +#endif + +namespace detail { +// Suppresses "unused variable" warnings with the method described in +// https://herbsutter.com/2009/10/18/mailbag-shutting-up-compiler-warnings/. +// (void)var does not work on many Intel compilers. +template FMT_CONSTEXPR void ignore_unused(const T&...) {} + +constexpr FMT_INLINE auto is_constant_evaluated( + bool default_value = false) noexcept -> bool { +// Workaround for incompatibility between libstdc++ consteval-based +// std::is_constant_evaluated() implementation and clang-14. +// https://github.com/fmtlib/fmt/issues/3247 +#if FMT_CPLUSPLUS >= 202002L && defined(_GLIBCXX_RELEASE) && \ + _GLIBCXX_RELEASE >= 12 && \ + (FMT_CLANG_VERSION >= 1400 && FMT_CLANG_VERSION < 1500) + ignore_unused(default_value); + return __builtin_is_constant_evaluated(); +#elif defined(__cpp_lib_is_constant_evaluated) + ignore_unused(default_value); + return std::is_constant_evaluated(); +#else + return default_value; +#endif +} + +// Suppresses "conditional expression is constant" warnings. +template constexpr FMT_INLINE auto const_check(T value) -> T { + return value; +} + +FMT_NORETURN FMT_API void assert_fail(const char* file, int line, + const char* message); + +#ifndef FMT_ASSERT +# ifdef NDEBUG +// FMT_ASSERT is not empty to avoid -Wempty-body. +# define FMT_ASSERT(condition, message) \ + fmt::detail::ignore_unused((condition), (message)) +# else +# define FMT_ASSERT(condition, message) \ + ((condition) /* void() fails with -Winvalid-constexpr on clang 4.0.1 */ \ + ? (void)0 \ + : fmt::detail::assert_fail(__FILE__, __LINE__, (message))) +# endif +#endif + +#if defined(FMT_USE_STRING_VIEW) +template using std_string_view = std::basic_string_view; +#elif defined(FMT_USE_EXPERIMENTAL_STRING_VIEW) +template +using std_string_view = std::experimental::basic_string_view; +#else +template struct std_string_view {}; +#endif + +#ifdef FMT_USE_INT128 +// Do nothing. +#elif defined(__SIZEOF_INT128__) && !defined(__NVCC__) && \ + !(FMT_CLANG_VERSION && FMT_MSC_VERSION) +# define FMT_USE_INT128 1 +using int128_opt = __int128_t; // An optional native 128-bit integer. +using uint128_opt = __uint128_t; +template inline auto convert_for_visit(T value) -> T { + return value; +} +#else +# define FMT_USE_INT128 0 +#endif +#if !FMT_USE_INT128 +enum class int128_opt {}; +enum class uint128_opt {}; +// Reduce template instantiations. +template auto convert_for_visit(T) -> monostate { return {}; } +#endif + +// Casts a nonnegative integer to unsigned. +template +FMT_CONSTEXPR auto to_unsigned(Int value) -> + typename std::make_unsigned::type { + FMT_ASSERT(std::is_unsigned::value || value >= 0, "negative value"); + return static_cast::type>(value); +} + +FMT_CONSTEXPR inline auto is_utf8() -> bool { + FMT_MSC_WARNING(suppress : 4566) constexpr unsigned char section[] = "\u00A7"; + + // Avoid buggy sign extensions in MSVC's constant evaluation mode (#2297). + using uchar = unsigned char; + return FMT_UNICODE || (sizeof(section) == 3 && uchar(section[0]) == 0xC2 && + uchar(section[1]) == 0xA7); +} +} // namespace detail + +/** + An implementation of ``std::basic_string_view`` for pre-C++17. It provides a + subset of the API. ``fmt::basic_string_view`` is used for format strings even + if ``std::string_view`` is available to prevent issues when a library is + compiled with a different ``-std`` option than the client code (which is not + recommended). + */ +FMT_EXPORT +template class basic_string_view { + private: + const Char* data_; + size_t size_; + + public: + using value_type = Char; + using iterator = const Char*; + + constexpr basic_string_view() noexcept : data_(nullptr), size_(0) {} + + /** Constructs a string reference object from a C string and a size. */ + constexpr basic_string_view(const Char* s, size_t count) noexcept + : data_(s), size_(count) {} + + /** + \rst + Constructs a string reference object from a C string computing + the size with ``std::char_traits::length``. + \endrst + */ + FMT_CONSTEXPR_CHAR_TRAITS + FMT_INLINE + basic_string_view(const Char* s) + : data_(s), + size_(detail::const_check(std::is_same::value && + !detail::is_constant_evaluated(true)) + ? std::strlen(reinterpret_cast(s)) + : std::char_traits::length(s)) {} + + /** Constructs a string reference from a ``std::basic_string`` object. */ + template + FMT_CONSTEXPR basic_string_view( + const std::basic_string& s) noexcept + : data_(s.data()), size_(s.size()) {} + + template >::value)> + FMT_CONSTEXPR basic_string_view(S s) noexcept + : data_(s.data()), size_(s.size()) {} + + /** Returns a pointer to the string data. */ + constexpr auto data() const noexcept -> const Char* { return data_; } + + /** Returns the string size. */ + constexpr auto size() const noexcept -> size_t { return size_; } + + constexpr auto begin() const noexcept -> iterator { return data_; } + constexpr auto end() const noexcept -> iterator { return data_ + size_; } + + constexpr auto operator[](size_t pos) const noexcept -> const Char& { + return data_[pos]; + } + + FMT_CONSTEXPR void remove_prefix(size_t n) noexcept { + data_ += n; + size_ -= n; + } + + FMT_CONSTEXPR_CHAR_TRAITS auto starts_with( + basic_string_view sv) const noexcept -> bool { + return size_ >= sv.size_ && + std::char_traits::compare(data_, sv.data_, sv.size_) == 0; + } + FMT_CONSTEXPR_CHAR_TRAITS auto starts_with(Char c) const noexcept -> bool { + return size_ >= 1 && std::char_traits::eq(*data_, c); + } + FMT_CONSTEXPR_CHAR_TRAITS auto starts_with(const Char* s) const -> bool { + return starts_with(basic_string_view(s)); + } + + // Lexicographically compare this string reference to other. + FMT_CONSTEXPR_CHAR_TRAITS auto compare(basic_string_view other) const -> int { + size_t str_size = size_ < other.size_ ? size_ : other.size_; + int result = std::char_traits::compare(data_, other.data_, str_size); + if (result == 0) + result = size_ == other.size_ ? 0 : (size_ < other.size_ ? -1 : 1); + return result; + } + + FMT_CONSTEXPR_CHAR_TRAITS friend auto operator==(basic_string_view lhs, + basic_string_view rhs) + -> bool { + return lhs.compare(rhs) == 0; + } + friend auto operator!=(basic_string_view lhs, basic_string_view rhs) -> bool { + return lhs.compare(rhs) != 0; + } + friend auto operator<(basic_string_view lhs, basic_string_view rhs) -> bool { + return lhs.compare(rhs) < 0; + } + friend auto operator<=(basic_string_view lhs, basic_string_view rhs) -> bool { + return lhs.compare(rhs) <= 0; + } + friend auto operator>(basic_string_view lhs, basic_string_view rhs) -> bool { + return lhs.compare(rhs) > 0; + } + friend auto operator>=(basic_string_view lhs, basic_string_view rhs) -> bool { + return lhs.compare(rhs) >= 0; + } +}; + +FMT_EXPORT +using string_view = basic_string_view; + +/** Specifies if ``T`` is a character type. Can be specialized by users. */ +FMT_EXPORT +template struct is_char : std::false_type {}; +template <> struct is_char : std::true_type {}; + +namespace detail { + +// A base class for compile-time strings. +struct compile_string {}; + +template +struct is_compile_string : std::is_base_of {}; + +template ::value)> +FMT_INLINE auto to_string_view(const Char* s) -> basic_string_view { + return s; +} +template +inline auto to_string_view(const std::basic_string& s) + -> basic_string_view { + return s; +} +template +constexpr auto to_string_view(basic_string_view s) + -> basic_string_view { + return s; +} +template >::value)> +inline auto to_string_view(std_string_view s) -> basic_string_view { + return s; +} +template ::value)> +constexpr auto to_string_view(const S& s) + -> basic_string_view { + return basic_string_view(s); +} +void to_string_view(...); + +// Specifies whether S is a string type convertible to fmt::basic_string_view. +// It should be a constexpr function but MSVC 2017 fails to compile it in +// enable_if and MSVC 2015 fails to compile it as an alias template. +// ADL is intentionally disabled as to_string_view is not an extension point. +template +struct is_string + : std::is_class()))> {}; + +template struct char_t_impl {}; +template struct char_t_impl::value>> { + using result = decltype(to_string_view(std::declval())); + using type = typename result::value_type; +}; + +enum class type { + none_type, + // Integer types should go first, + int_type, + uint_type, + long_long_type, + ulong_long_type, + int128_type, + uint128_type, + bool_type, + char_type, + last_integer_type = char_type, + // followed by floating-point types. + float_type, + double_type, + long_double_type, + last_numeric_type = long_double_type, + cstring_type, + string_type, + pointer_type, + custom_type +}; + +// Maps core type T to the corresponding type enum constant. +template +struct type_constant : std::integral_constant {}; + +#define FMT_TYPE_CONSTANT(Type, constant) \ + template \ + struct type_constant \ + : std::integral_constant {} + +FMT_TYPE_CONSTANT(int, int_type); +FMT_TYPE_CONSTANT(unsigned, uint_type); +FMT_TYPE_CONSTANT(long long, long_long_type); +FMT_TYPE_CONSTANT(unsigned long long, ulong_long_type); +FMT_TYPE_CONSTANT(int128_opt, int128_type); +FMT_TYPE_CONSTANT(uint128_opt, uint128_type); +FMT_TYPE_CONSTANT(bool, bool_type); +FMT_TYPE_CONSTANT(Char, char_type); +FMT_TYPE_CONSTANT(float, float_type); +FMT_TYPE_CONSTANT(double, double_type); +FMT_TYPE_CONSTANT(long double, long_double_type); +FMT_TYPE_CONSTANT(const Char*, cstring_type); +FMT_TYPE_CONSTANT(basic_string_view, string_type); +FMT_TYPE_CONSTANT(const void*, pointer_type); + +constexpr auto is_integral_type(type t) -> bool { + return t > type::none_type && t <= type::last_integer_type; +} +constexpr auto is_arithmetic_type(type t) -> bool { + return t > type::none_type && t <= type::last_numeric_type; +} + +constexpr auto set(type rhs) -> int { return 1 << static_cast(rhs); } +constexpr auto in(type t, int set) -> bool { + return ((set >> static_cast(t)) & 1) != 0; +} + +// Bitsets of types. +enum { + sint_set = + set(type::int_type) | set(type::long_long_type) | set(type::int128_type), + uint_set = set(type::uint_type) | set(type::ulong_long_type) | + set(type::uint128_type), + bool_set = set(type::bool_type), + char_set = set(type::char_type), + float_set = set(type::float_type) | set(type::double_type) | + set(type::long_double_type), + string_set = set(type::string_type), + cstring_set = set(type::cstring_type), + pointer_set = set(type::pointer_type) +}; + +// DEPRECATED! +FMT_NORETURN FMT_API void throw_format_error(const char* message); + +struct error_handler { + constexpr error_handler() = default; + + // This function is intentionally not constexpr to give a compile-time error. + FMT_NORETURN void on_error(const char* message) { + throw_format_error(message); + } +}; +} // namespace detail + +/** Throws ``format_error`` with a given message. */ +using detail::throw_format_error; + +/** String's character type. */ +template using char_t = typename detail::char_t_impl::type; + +/** + \rst + Parsing context consisting of a format string range being parsed and an + argument counter for automatic indexing. + You can use the ``format_parse_context`` type alias for ``char`` instead. + \endrst + */ +FMT_EXPORT +template class basic_format_parse_context { + private: + basic_string_view format_str_; + int next_arg_id_; + + FMT_CONSTEXPR void do_check_arg_id(int id); + + public: + using char_type = Char; + using iterator = const Char*; + + explicit constexpr basic_format_parse_context( + basic_string_view format_str, int next_arg_id = 0) + : format_str_(format_str), next_arg_id_(next_arg_id) {} + + /** + Returns an iterator to the beginning of the format string range being + parsed. + */ + constexpr auto begin() const noexcept -> iterator { + return format_str_.begin(); + } + + /** + Returns an iterator past the end of the format string range being parsed. + */ + constexpr auto end() const noexcept -> iterator { return format_str_.end(); } + + /** Advances the begin iterator to ``it``. */ + FMT_CONSTEXPR void advance_to(iterator it) { + format_str_.remove_prefix(detail::to_unsigned(it - begin())); + } + + /** + Reports an error if using the manual argument indexing; otherwise returns + the next argument index and switches to the automatic indexing. + */ + FMT_CONSTEXPR auto next_arg_id() -> int { + if (next_arg_id_ < 0) { + detail::throw_format_error( + "cannot switch from manual to automatic argument indexing"); + return 0; + } + int id = next_arg_id_++; + do_check_arg_id(id); + return id; + } + + /** + Reports an error if using the automatic argument indexing; otherwise + switches to the manual indexing. + */ + FMT_CONSTEXPR void check_arg_id(int id) { + if (next_arg_id_ > 0) { + detail::throw_format_error( + "cannot switch from automatic to manual argument indexing"); + return; + } + next_arg_id_ = -1; + do_check_arg_id(id); + } + FMT_CONSTEXPR void check_arg_id(basic_string_view) {} + FMT_CONSTEXPR void check_dynamic_spec(int arg_id); +}; + +FMT_EXPORT +using format_parse_context = basic_format_parse_context; + +namespace detail { +// A parse context with extra data used only in compile-time checks. +template +class compile_parse_context : public basic_format_parse_context { + private: + int num_args_; + const type* types_; + using base = basic_format_parse_context; + + public: + explicit FMT_CONSTEXPR compile_parse_context( + basic_string_view format_str, int num_args, const type* types, + int next_arg_id = 0) + : base(format_str, next_arg_id), num_args_(num_args), types_(types) {} + + constexpr auto num_args() const -> int { return num_args_; } + constexpr auto arg_type(int id) const -> type { return types_[id]; } + + FMT_CONSTEXPR auto next_arg_id() -> int { + int id = base::next_arg_id(); + if (id >= num_args_) throw_format_error("argument not found"); + return id; + } + + FMT_CONSTEXPR void check_arg_id(int id) { + base::check_arg_id(id); + if (id >= num_args_) throw_format_error("argument not found"); + } + using base::check_arg_id; + + FMT_CONSTEXPR void check_dynamic_spec(int arg_id) { + detail::ignore_unused(arg_id); +#if !defined(__LCC__) + if (arg_id < num_args_ && types_ && !is_integral_type(types_[arg_id])) + throw_format_error("width/precision is not integer"); +#endif + } +}; + +// Extracts a reference to the container from back_insert_iterator. +template +inline auto get_container(std::back_insert_iterator it) + -> Container& { + using base = std::back_insert_iterator; + struct accessor : base { + accessor(base b) : base(b) {} + using base::container; + }; + return *accessor(it).container; +} + +template +FMT_CONSTEXPR auto copy_str(InputIt begin, InputIt end, OutputIt out) + -> OutputIt { + while (begin != end) *out++ = static_cast(*begin++); + return out; +} + +template , U>::value&& is_char::value)> +FMT_CONSTEXPR auto copy_str(T* begin, T* end, U* out) -> U* { + if (is_constant_evaluated()) return copy_str(begin, end, out); + auto size = to_unsigned(end - begin); + if (size > 0) memcpy(out, begin, size * sizeof(U)); + return out + size; +} + +/** + \rst + A contiguous memory buffer with an optional growing ability. It is an internal + class and shouldn't be used directly, only via `~fmt::basic_memory_buffer`. + \endrst + */ +template class buffer { + private: + T* ptr_; + size_t size_; + size_t capacity_; + + protected: + // Don't initialize ptr_ since it is not accessed to save a few cycles. + FMT_MSC_WARNING(suppress : 26495) + FMT_CONSTEXPR buffer(size_t sz) noexcept : size_(sz), capacity_(sz) {} + + FMT_CONSTEXPR20 buffer(T* p = nullptr, size_t sz = 0, size_t cap = 0) noexcept + : ptr_(p), size_(sz), capacity_(cap) {} + + FMT_CONSTEXPR20 ~buffer() = default; + buffer(buffer&&) = default; + + /** Sets the buffer data and capacity. */ + FMT_CONSTEXPR void set(T* buf_data, size_t buf_capacity) noexcept { + ptr_ = buf_data; + capacity_ = buf_capacity; + } + + /** Increases the buffer capacity to hold at least *capacity* elements. */ + // DEPRECATED! + virtual FMT_CONSTEXPR20 void grow(size_t capacity) = 0; + + public: + using value_type = T; + using const_reference = const T&; + + buffer(const buffer&) = delete; + void operator=(const buffer&) = delete; + + FMT_INLINE auto begin() noexcept -> T* { return ptr_; } + FMT_INLINE auto end() noexcept -> T* { return ptr_ + size_; } + + FMT_INLINE auto begin() const noexcept -> const T* { return ptr_; } + FMT_INLINE auto end() const noexcept -> const T* { return ptr_ + size_; } + + /** Returns the size of this buffer. */ + constexpr auto size() const noexcept -> size_t { return size_; } + + /** Returns the capacity of this buffer. */ + constexpr auto capacity() const noexcept -> size_t { return capacity_; } + + /** Returns a pointer to the buffer data (not null-terminated). */ + FMT_CONSTEXPR auto data() noexcept -> T* { return ptr_; } + FMT_CONSTEXPR auto data() const noexcept -> const T* { return ptr_; } + + /** Clears this buffer. */ + void clear() { size_ = 0; } + + // Tries resizing the buffer to contain *count* elements. If T is a POD type + // the new elements may not be initialized. + FMT_CONSTEXPR20 void try_resize(size_t count) { + try_reserve(count); + size_ = count <= capacity_ ? count : capacity_; + } + + // Tries increasing the buffer capacity to *new_capacity*. It can increase the + // capacity by a smaller amount than requested but guarantees there is space + // for at least one additional element either by increasing the capacity or by + // flushing the buffer if it is full. + FMT_CONSTEXPR20 void try_reserve(size_t new_capacity) { + if (new_capacity > capacity_) grow(new_capacity); + } + + FMT_CONSTEXPR20 void push_back(const T& value) { + try_reserve(size_ + 1); + ptr_[size_++] = value; + } + + /** Appends data to the end of the buffer. */ + template void append(const U* begin, const U* end); + + template FMT_CONSTEXPR auto operator[](Idx index) -> T& { + return ptr_[index]; + } + template + FMT_CONSTEXPR auto operator[](Idx index) const -> const T& { + return ptr_[index]; + } +}; + +struct buffer_traits { + explicit buffer_traits(size_t) {} + auto count() const -> size_t { return 0; } + auto limit(size_t size) -> size_t { return size; } +}; + +class fixed_buffer_traits { + private: + size_t count_ = 0; + size_t limit_; + + public: + explicit fixed_buffer_traits(size_t limit) : limit_(limit) {} + auto count() const -> size_t { return count_; } + auto limit(size_t size) -> size_t { + size_t n = limit_ > count_ ? limit_ - count_ : 0; + count_ += size; + return size < n ? size : n; + } +}; + +// A buffer that writes to an output iterator when flushed. +template +class iterator_buffer final : public Traits, public buffer { + private: + OutputIt out_; + enum { buffer_size = 256 }; + T data_[buffer_size]; + + protected: + FMT_CONSTEXPR20 void grow(size_t) override { + if (this->size() == buffer_size) flush(); + } + + void flush() { + auto size = this->size(); + this->clear(); + out_ = copy_str(data_, data_ + this->limit(size), out_); + } + + public: + explicit iterator_buffer(OutputIt out, size_t n = buffer_size) + : Traits(n), buffer(data_, 0, buffer_size), out_(out) {} + iterator_buffer(iterator_buffer&& other) + : Traits(other), buffer(data_, 0, buffer_size), out_(other.out_) {} + ~iterator_buffer() { flush(); } + + auto out() -> OutputIt { + flush(); + return out_; + } + auto count() const -> size_t { return Traits::count() + this->size(); } +}; + +template +class iterator_buffer final + : public fixed_buffer_traits, + public buffer { + private: + T* out_; + enum { buffer_size = 256 }; + T data_[buffer_size]; + + protected: + FMT_CONSTEXPR20 void grow(size_t) override { + if (this->size() == this->capacity()) flush(); + } + + void flush() { + size_t n = this->limit(this->size()); + if (this->data() == out_) { + out_ += n; + this->set(data_, buffer_size); + } + this->clear(); + } + + public: + explicit iterator_buffer(T* out, size_t n = buffer_size) + : fixed_buffer_traits(n), buffer(out, 0, n), out_(out) {} + iterator_buffer(iterator_buffer&& other) + : fixed_buffer_traits(other), + buffer(std::move(other)), + out_(other.out_) { + if (this->data() != out_) { + this->set(data_, buffer_size); + this->clear(); + } + } + ~iterator_buffer() { flush(); } + + auto out() -> T* { + flush(); + return out_; + } + auto count() const -> size_t { + return fixed_buffer_traits::count() + this->size(); + } +}; + +template class iterator_buffer final : public buffer { + protected: + FMT_CONSTEXPR20 void grow(size_t) override {} + + public: + explicit iterator_buffer(T* out, size_t = 0) : buffer(out, 0, ~size_t()) {} + + auto out() -> T* { return &*this->end(); } +}; + +// A buffer that writes to a container with the contiguous storage. +template +class iterator_buffer, + enable_if_t::value, + typename Container::value_type>> + final : public buffer { + private: + Container& container_; + + protected: + FMT_CONSTEXPR20 void grow(size_t capacity) override { + container_.resize(capacity); + this->set(&container_[0], capacity); + } + + public: + explicit iterator_buffer(Container& c) + : buffer(c.size()), container_(c) {} + explicit iterator_buffer(std::back_insert_iterator out, size_t = 0) + : iterator_buffer(get_container(out)) {} + + auto out() -> std::back_insert_iterator { + return std::back_inserter(container_); + } +}; + +// A buffer that counts the number of code units written discarding the output. +template class counting_buffer final : public buffer { + private: + enum { buffer_size = 256 }; + T data_[buffer_size]; + size_t count_ = 0; + + protected: + FMT_CONSTEXPR20 void grow(size_t) override { + if (this->size() != buffer_size) return; + count_ += this->size(); + this->clear(); + } + + public: + counting_buffer() : buffer(data_, 0, buffer_size) {} + + auto count() -> size_t { return count_ + this->size(); } +}; +} // namespace detail + +template +FMT_CONSTEXPR void basic_format_parse_context::do_check_arg_id(int id) { + // Argument id is only checked at compile-time during parsing because + // formatting has its own validation. + if (detail::is_constant_evaluated() && + (!FMT_GCC_VERSION || FMT_GCC_VERSION >= 1200)) { + using context = detail::compile_parse_context; + if (id >= static_cast(this)->num_args()) + detail::throw_format_error("argument not found"); + } +} + +template +FMT_CONSTEXPR void basic_format_parse_context::check_dynamic_spec( + int arg_id) { + if (detail::is_constant_evaluated() && + (!FMT_GCC_VERSION || FMT_GCC_VERSION >= 1200)) { + using context = detail::compile_parse_context; + static_cast(this)->check_dynamic_spec(arg_id); + } +} + +FMT_EXPORT template class basic_format_arg; +FMT_EXPORT template class basic_format_args; +FMT_EXPORT template class dynamic_format_arg_store; + +// A formatter for objects of type T. +FMT_EXPORT +template +struct formatter { + // A deleted default constructor indicates a disabled formatter. + formatter() = delete; +}; + +// Specifies if T has an enabled formatter specialization. A type can be +// formattable even if it doesn't have a formatter e.g. via a conversion. +template +using has_formatter = + std::is_constructible>; + +// An output iterator that appends to a buffer. +// It is used to reduce symbol sizes for the common case. +class appender : public std::back_insert_iterator> { + using base = std::back_insert_iterator>; + + public: + using std::back_insert_iterator>::back_insert_iterator; + appender(base it) noexcept : base(it) {} + FMT_UNCHECKED_ITERATOR(appender); + + auto operator++() noexcept -> appender& { return *this; } + auto operator++(int) noexcept -> appender { return *this; } +}; + +namespace detail { + +template +constexpr auto has_const_formatter_impl(T*) + -> decltype(typename Context::template formatter_type().format( + std::declval(), std::declval()), + true) { + return true; +} +template +constexpr auto has_const_formatter_impl(...) -> bool { + return false; +} +template +constexpr auto has_const_formatter() -> bool { + return has_const_formatter_impl(static_cast(nullptr)); +} + +template +using buffer_appender = conditional_t::value, appender, + std::back_insert_iterator>>; + +// Maps an output iterator to a buffer. +template +auto get_buffer(OutputIt out) -> iterator_buffer { + return iterator_buffer(out); +} +template , Buf>::value)> +auto get_buffer(std::back_insert_iterator out) -> buffer& { + return get_container(out); +} + +template +FMT_INLINE auto get_iterator(Buf& buf, OutputIt) -> decltype(buf.out()) { + return buf.out(); +} +template +auto get_iterator(buffer&, OutputIt out) -> OutputIt { + return out; +} + +struct view {}; + +template struct named_arg : view { + const Char* name; + const T& value; + named_arg(const Char* n, const T& v) : name(n), value(v) {} +}; + +template struct named_arg_info { + const Char* name; + int id; +}; + +template +struct arg_data { + // args_[0].named_args points to named_args_ to avoid bloating format_args. + // +1 to workaround a bug in gcc 7.5 that causes duplicated-branches warning. + T args_[1 + (NUM_ARGS != 0 ? NUM_ARGS : +1)]; + named_arg_info named_args_[NUM_NAMED_ARGS]; + + template + arg_data(const U&... init) : args_{T(named_args_, NUM_NAMED_ARGS), init...} {} + arg_data(const arg_data& other) = delete; + auto args() const -> const T* { return args_ + 1; } + auto named_args() -> named_arg_info* { return named_args_; } +}; + +template +struct arg_data { + // +1 to workaround a bug in gcc 7.5 that causes duplicated-branches warning. + T args_[NUM_ARGS != 0 ? NUM_ARGS : +1]; + + template + FMT_CONSTEXPR FMT_INLINE arg_data(const U&... init) : args_{init...} {} + FMT_CONSTEXPR FMT_INLINE auto args() const -> const T* { return args_; } + FMT_CONSTEXPR FMT_INLINE auto named_args() -> std::nullptr_t { + return nullptr; + } +}; + +template +inline void init_named_args(named_arg_info*, int, int) {} + +template struct is_named_arg : std::false_type {}; +template struct is_statically_named_arg : std::false_type {}; + +template +struct is_named_arg> : std::true_type {}; + +template ::value)> +void init_named_args(named_arg_info* named_args, int arg_count, + int named_arg_count, const T&, const Tail&... args) { + init_named_args(named_args, arg_count + 1, named_arg_count, args...); +} + +template ::value)> +void init_named_args(named_arg_info* named_args, int arg_count, + int named_arg_count, const T& arg, const Tail&... args) { + named_args[named_arg_count++] = {arg.name, arg_count}; + init_named_args(named_args, arg_count + 1, named_arg_count, args...); +} + +template +FMT_CONSTEXPR FMT_INLINE void init_named_args(std::nullptr_t, int, int, + const Args&...) {} + +template constexpr auto count() -> size_t { return B ? 1 : 0; } +template constexpr auto count() -> size_t { + return (B1 ? 1 : 0) + count(); +} + +template constexpr auto count_named_args() -> size_t { + return count::value...>(); +} + +template +constexpr auto count_statically_named_args() -> size_t { + return count::value...>(); +} + +struct unformattable {}; +struct unformattable_char : unformattable {}; +struct unformattable_pointer : unformattable {}; + +template struct string_value { + const Char* data; + size_t size; +}; + +template struct named_arg_value { + const named_arg_info* data; + size_t size; +}; + +template struct custom_value { + using parse_context = typename Context::parse_context_type; + void* value; + void (*format)(void* arg, parse_context& parse_ctx, Context& ctx); +}; + +// A formatting argument value. +template class value { + public: + using char_type = typename Context::char_type; + + union { + monostate no_value; + int int_value; + unsigned uint_value; + long long long_long_value; + unsigned long long ulong_long_value; + int128_opt int128_value; + uint128_opt uint128_value; + bool bool_value; + char_type char_value; + float float_value; + double double_value; + long double long_double_value; + const void* pointer; + string_value string; + custom_value custom; + named_arg_value named_args; + }; + + constexpr FMT_INLINE value() : no_value() {} + constexpr FMT_INLINE value(int val) : int_value(val) {} + constexpr FMT_INLINE value(unsigned val) : uint_value(val) {} + constexpr FMT_INLINE value(long long val) : long_long_value(val) {} + constexpr FMT_INLINE value(unsigned long long val) : ulong_long_value(val) {} + FMT_INLINE value(int128_opt val) : int128_value(val) {} + FMT_INLINE value(uint128_opt val) : uint128_value(val) {} + constexpr FMT_INLINE value(float val) : float_value(val) {} + constexpr FMT_INLINE value(double val) : double_value(val) {} + FMT_INLINE value(long double val) : long_double_value(val) {} + constexpr FMT_INLINE value(bool val) : bool_value(val) {} + constexpr FMT_INLINE value(char_type val) : char_value(val) {} + FMT_CONSTEXPR FMT_INLINE value(const char_type* val) { + string.data = val; + if (is_constant_evaluated()) string.size = {}; + } + FMT_CONSTEXPR FMT_INLINE value(basic_string_view val) { + string.data = val.data(); + string.size = val.size(); + } + FMT_INLINE value(const void* val) : pointer(val) {} + FMT_INLINE value(const named_arg_info* args, size_t size) + : named_args{args, size} {} + + template FMT_CONSTEXPR20 FMT_INLINE value(T& val) { + using value_type = remove_const_t; + custom.value = const_cast(std::addressof(val)); + // Get the formatter type through the context to allow different contexts + // have different extension points, e.g. `formatter` for `format` and + // `printf_formatter` for `printf`. + custom.format = format_custom_arg< + value_type, typename Context::template formatter_type>; + } + value(unformattable); + value(unformattable_char); + value(unformattable_pointer); + + private: + // Formats an argument of a custom type, such as a user-defined class. + template + static void format_custom_arg(void* arg, + typename Context::parse_context_type& parse_ctx, + Context& ctx) { + auto f = Formatter(); + parse_ctx.advance_to(f.parse(parse_ctx)); + using qualified_type = + conditional_t(), const T, T>; + // Calling format through a mutable reference is deprecated. + ctx.advance_to(f.format(*static_cast(arg), ctx)); + } +}; + +// To minimize the number of types we need to deal with, long is translated +// either to int or to long long depending on its size. +enum { long_short = sizeof(long) == sizeof(int) }; +using long_type = conditional_t; +using ulong_type = conditional_t; + +template struct format_as_result { + template ::value || std::is_class::value)> + static auto map(U*) -> remove_cvref_t()))>; + static auto map(...) -> void; + + using type = decltype(map(static_cast(nullptr))); +}; +template using format_as_t = typename format_as_result::type; + +template +struct has_format_as + : bool_constant, void>::value> {}; + +// Maps formatting arguments to core types. +// arg_mapper reports errors by returning unformattable instead of using +// static_assert because it's used in the is_formattable trait. +template struct arg_mapper { + using char_type = typename Context::char_type; + + FMT_CONSTEXPR FMT_INLINE auto map(signed char val) -> int { return val; } + FMT_CONSTEXPR FMT_INLINE auto map(unsigned char val) -> unsigned { + return val; + } + FMT_CONSTEXPR FMT_INLINE auto map(short val) -> int { return val; } + FMT_CONSTEXPR FMT_INLINE auto map(unsigned short val) -> unsigned { + return val; + } + FMT_CONSTEXPR FMT_INLINE auto map(int val) -> int { return val; } + FMT_CONSTEXPR FMT_INLINE auto map(unsigned val) -> unsigned { return val; } + FMT_CONSTEXPR FMT_INLINE auto map(long val) -> long_type { return val; } + FMT_CONSTEXPR FMT_INLINE auto map(unsigned long val) -> ulong_type { + return val; + } + FMT_CONSTEXPR FMT_INLINE auto map(long long val) -> long long { return val; } + FMT_CONSTEXPR FMT_INLINE auto map(unsigned long long val) + -> unsigned long long { + return val; + } + FMT_CONSTEXPR FMT_INLINE auto map(int128_opt val) -> int128_opt { + return val; + } + FMT_CONSTEXPR FMT_INLINE auto map(uint128_opt val) -> uint128_opt { + return val; + } + FMT_CONSTEXPR FMT_INLINE auto map(bool val) -> bool { return val; } + + template ::value || + std::is_same::value)> + FMT_CONSTEXPR FMT_INLINE auto map(T val) -> char_type { + return val; + } + template ::value || +#ifdef __cpp_char8_t + std::is_same::value || +#endif + std::is_same::value || + std::is_same::value) && + !std::is_same::value, + int> = 0> + FMT_CONSTEXPR FMT_INLINE auto map(T) -> unformattable_char { + return {}; + } + + FMT_CONSTEXPR FMT_INLINE auto map(float val) -> float { return val; } + FMT_CONSTEXPR FMT_INLINE auto map(double val) -> double { return val; } + FMT_CONSTEXPR FMT_INLINE auto map(long double val) -> long double { + return val; + } + + FMT_CONSTEXPR FMT_INLINE auto map(char_type* val) -> const char_type* { + return val; + } + FMT_CONSTEXPR FMT_INLINE auto map(const char_type* val) -> const char_type* { + return val; + } + template ::value && !std::is_pointer::value && + std::is_same>::value)> + FMT_CONSTEXPR FMT_INLINE auto map(const T& val) + -> basic_string_view { + return to_string_view(val); + } + template ::value && !std::is_pointer::value && + !std::is_same>::value)> + FMT_CONSTEXPR FMT_INLINE auto map(const T&) -> unformattable_char { + return {}; + } + + FMT_CONSTEXPR FMT_INLINE auto map(void* val) -> const void* { return val; } + FMT_CONSTEXPR FMT_INLINE auto map(const void* val) -> const void* { + return val; + } + FMT_CONSTEXPR FMT_INLINE auto map(std::nullptr_t val) -> const void* { + return val; + } + + // Use SFINAE instead of a const T* parameter to avoid a conflict with the + // array overload. + template < + typename T, + FMT_ENABLE_IF( + std::is_pointer::value || std::is_member_pointer::value || + std::is_function::type>::value || + (std::is_array::value && + !std::is_convertible::value))> + FMT_CONSTEXPR auto map(const T&) -> unformattable_pointer { + return {}; + } + + template ::value)> + FMT_CONSTEXPR FMT_INLINE auto map(const T (&values)[N]) -> const T (&)[N] { + return values; + } + + // Only map owning types because mapping views can be unsafe. + template , + FMT_ENABLE_IF(std::is_arithmetic::value)> + FMT_CONSTEXPR FMT_INLINE auto map(const T& val) + -> decltype(FMT_DECLTYPE_THIS map(U())) { + return map(format_as(val)); + } + + template > + struct formattable : bool_constant() || + (has_formatter::value && + !std::is_const::value)> {}; + + template ::value)> + FMT_CONSTEXPR FMT_INLINE auto do_map(T& val) -> T& { + return val; + } + template ::value)> + FMT_CONSTEXPR FMT_INLINE auto do_map(T&) -> unformattable { + return {}; + } + + template , + FMT_ENABLE_IF((std::is_class::value || std::is_enum::value || + std::is_union::value) && + !is_string::value && !is_char::value && + !is_named_arg::value && + !std::is_arithmetic>::value)> + FMT_CONSTEXPR FMT_INLINE auto map(T& val) + -> decltype(FMT_DECLTYPE_THIS do_map(val)) { + return do_map(val); + } + + template ::value)> + FMT_CONSTEXPR FMT_INLINE auto map(const T& named_arg) + -> decltype(FMT_DECLTYPE_THIS map(named_arg.value)) { + return map(named_arg.value); + } + + auto map(...) -> unformattable { return {}; } +}; + +// A type constant after applying arg_mapper. +template +using mapped_type_constant = + type_constant().map(std::declval())), + typename Context::char_type>; + +enum { packed_arg_bits = 4 }; +// Maximum number of arguments with packed types. +enum { max_packed_args = 62 / packed_arg_bits }; +enum : unsigned long long { is_unpacked_bit = 1ULL << 63 }; +enum : unsigned long long { has_named_args_bit = 1ULL << 62 }; + +template +auto copy_str(InputIt begin, InputIt end, appender out) -> appender { + get_container(out).append(begin, end); + return out; +} +template +auto copy_str(InputIt begin, InputIt end, + std::back_insert_iterator out) + -> std::back_insert_iterator { + get_container(out).append(begin, end); + return out; +} + +template +FMT_CONSTEXPR auto copy_str(R&& rng, OutputIt out) -> OutputIt { + return detail::copy_str(rng.begin(), rng.end(), out); +} + +#if FMT_GCC_VERSION && FMT_GCC_VERSION < 500 +// A workaround for gcc 4.8 to make void_t work in a SFINAE context. +template struct void_t_impl { + using type = void; +}; +template using void_t = typename void_t_impl::type; +#else +template using void_t = void; +#endif + +template +struct is_output_iterator : std::false_type {}; + +template +struct is_output_iterator< + It, T, + void_t::iterator_category, + decltype(*std::declval() = std::declval())>> + : std::true_type {}; + +template struct is_back_insert_iterator : std::false_type {}; +template +struct is_back_insert_iterator> + : std::true_type {}; + +// A type-erased reference to an std::locale to avoid a heavy include. +class locale_ref { + private: + const void* locale_; // A type-erased pointer to std::locale. + + public: + constexpr FMT_INLINE locale_ref() : locale_(nullptr) {} + template explicit locale_ref(const Locale& loc); + + explicit operator bool() const noexcept { return locale_ != nullptr; } + + template auto get() const -> Locale; +}; + +template constexpr auto encode_types() -> unsigned long long { + return 0; +} + +template +constexpr auto encode_types() -> unsigned long long { + return static_cast(mapped_type_constant::value) | + (encode_types() << packed_arg_bits); +} + +#if defined(__cpp_if_constexpr) +// This type is intentionally undefined, only used for errors +template struct type_is_unformattable_for; +#endif + +template +FMT_CONSTEXPR FMT_INLINE auto make_arg(T& val) -> value { + using arg_type = remove_cvref_t().map(val))>; + + constexpr bool formattable_char = + !std::is_same::value; + static_assert(formattable_char, "Mixing character types is disallowed."); + + // Formatting of arbitrary pointers is disallowed. If you want to format a + // pointer cast it to `void*` or `const void*`. In particular, this forbids + // formatting of `[const] volatile char*` printed as bool by iostreams. + constexpr bool formattable_pointer = + !std::is_same::value; + static_assert(formattable_pointer, + "Formatting of non-void pointers is disallowed."); + + constexpr bool formattable = !std::is_same::value; +#if defined(__cpp_if_constexpr) + if constexpr (!formattable) { + type_is_unformattable_for _; + } +#endif + static_assert( + formattable, + "Cannot format an argument. To make type T formattable provide a " + "formatter specialization: https://fmt.dev/latest/api.html#udt"); + return {arg_mapper().map(val)}; +} + +template +FMT_CONSTEXPR auto make_arg(T& val) -> basic_format_arg { + auto arg = basic_format_arg(); + arg.type_ = mapped_type_constant::value; + arg.value_ = make_arg(val); + return arg; +} + +template +FMT_CONSTEXPR inline auto make_arg(T& val) -> basic_format_arg { + return make_arg(val); +} +} // namespace detail +FMT_BEGIN_EXPORT + +// A formatting argument. Context is a template parameter for the compiled API +// where output can be unbuffered. +template class basic_format_arg { + private: + detail::value value_; + detail::type type_; + + template + friend FMT_CONSTEXPR auto detail::make_arg(T& value) + -> basic_format_arg; + + template + friend FMT_CONSTEXPR auto visit_format_arg(Visitor&& vis, + const basic_format_arg& arg) + -> decltype(vis(0)); + + friend class basic_format_args; + friend class dynamic_format_arg_store; + + using char_type = typename Context::char_type; + + template + friend struct detail::arg_data; + + basic_format_arg(const detail::named_arg_info* args, size_t size) + : value_(args, size) {} + + public: + class handle { + public: + explicit handle(detail::custom_value custom) : custom_(custom) {} + + void format(typename Context::parse_context_type& parse_ctx, + Context& ctx) const { + custom_.format(custom_.value, parse_ctx, ctx); + } + + private: + detail::custom_value custom_; + }; + + constexpr basic_format_arg() : type_(detail::type::none_type) {} + + constexpr explicit operator bool() const noexcept { + return type_ != detail::type::none_type; + } + + auto type() const -> detail::type { return type_; } + + auto is_integral() const -> bool { return detail::is_integral_type(type_); } + auto is_arithmetic() const -> bool { + return detail::is_arithmetic_type(type_); + } + + FMT_INLINE auto format_custom(const char_type* parse_begin, + typename Context::parse_context_type& parse_ctx, + Context& ctx) -> bool { + if (type_ != detail::type::custom_type) return false; + parse_ctx.advance_to(parse_begin); + value_.custom.format(value_.custom.value, parse_ctx, ctx); + return true; + } +}; + +/** + \rst + Visits an argument dispatching to the appropriate visit method based on + the argument type. For example, if the argument type is ``double`` then + ``vis(value)`` will be called with the value of type ``double``. + \endrst + */ +// DEPRECATED! +template +FMT_CONSTEXPR FMT_INLINE auto visit_format_arg( + Visitor&& vis, const basic_format_arg& arg) -> decltype(vis(0)) { + switch (arg.type_) { + case detail::type::none_type: + break; + case detail::type::int_type: + return vis(arg.value_.int_value); + case detail::type::uint_type: + return vis(arg.value_.uint_value); + case detail::type::long_long_type: + return vis(arg.value_.long_long_value); + case detail::type::ulong_long_type: + return vis(arg.value_.ulong_long_value); + case detail::type::int128_type: + return vis(detail::convert_for_visit(arg.value_.int128_value)); + case detail::type::uint128_type: + return vis(detail::convert_for_visit(arg.value_.uint128_value)); + case detail::type::bool_type: + return vis(arg.value_.bool_value); + case detail::type::char_type: + return vis(arg.value_.char_value); + case detail::type::float_type: + return vis(arg.value_.float_value); + case detail::type::double_type: + return vis(arg.value_.double_value); + case detail::type::long_double_type: + return vis(arg.value_.long_double_value); + case detail::type::cstring_type: + return vis(arg.value_.string.data); + case detail::type::string_type: + using sv = basic_string_view; + return vis(sv(arg.value_.string.data, arg.value_.string.size)); + case detail::type::pointer_type: + return vis(arg.value_.pointer); + case detail::type::custom_type: + return vis(typename basic_format_arg::handle(arg.value_.custom)); + } + return vis(monostate()); +} + +// Formatting context. +template class basic_format_context { + private: + OutputIt out_; + basic_format_args args_; + detail::locale_ref loc_; + + public: + using iterator = OutputIt; + using format_arg = basic_format_arg; + using format_args = basic_format_args; + using parse_context_type = basic_format_parse_context; + template using formatter_type = formatter; + + /** The character type for the output. */ + using char_type = Char; + + basic_format_context(basic_format_context&&) = default; + basic_format_context(const basic_format_context&) = delete; + void operator=(const basic_format_context&) = delete; + /** + Constructs a ``basic_format_context`` object. References to the arguments + are stored in the object so make sure they have appropriate lifetimes. + */ + constexpr basic_format_context(OutputIt out, format_args ctx_args, + detail::locale_ref loc = {}) + : out_(out), args_(ctx_args), loc_(loc) {} + + constexpr auto arg(int id) const -> format_arg { return args_.get(id); } + FMT_CONSTEXPR auto arg(basic_string_view name) -> format_arg { + return args_.get(name); + } + FMT_CONSTEXPR auto arg_id(basic_string_view name) -> int { + return args_.get_id(name); + } + auto args() const -> const format_args& { return args_; } + + // DEPRECATED! + FMT_CONSTEXPR auto error_handler() -> detail::error_handler { return {}; } + void on_error(const char* message) { error_handler().on_error(message); } + + // Returns an iterator to the beginning of the output range. + FMT_CONSTEXPR auto out() -> iterator { return out_; } + + // Advances the begin iterator to ``it``. + void advance_to(iterator it) { + if (!detail::is_back_insert_iterator()) out_ = it; + } + + FMT_CONSTEXPR auto locale() -> detail::locale_ref { return loc_; } +}; + +template +using buffer_context = + basic_format_context, Char>; +using format_context = buffer_context; + +template +using is_formattable = bool_constant>() + .map(std::declval()))>::value>; + +/** + \rst + An array of references to arguments. It can be implicitly converted into + `~fmt::basic_format_args` for passing into type-erased formatting functions + such as `~fmt::vformat`. + \endrst + */ +template +class format_arg_store +#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409 + // Workaround a GCC template argument substitution bug. + : public basic_format_args +#endif +{ + private: + static const size_t num_args = sizeof...(Args); + static constexpr size_t num_named_args = detail::count_named_args(); + static const bool is_packed = num_args <= detail::max_packed_args; + + using value_type = conditional_t, + basic_format_arg>; + + detail::arg_data + data_; + + friend class basic_format_args; + + static constexpr unsigned long long desc = + (is_packed ? detail::encode_types() + : detail::is_unpacked_bit | num_args) | + (num_named_args != 0 + ? static_cast(detail::has_named_args_bit) + : 0); + + public: + template + FMT_CONSTEXPR FMT_INLINE format_arg_store(T&... args) + : +#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409 + basic_format_args(*this), +#endif + data_{detail::make_arg(args)...} { + if (detail::const_check(num_named_args != 0)) + detail::init_named_args(data_.named_args(), 0, 0, args...); + } +}; + +/** + \rst + Constructs a `~fmt::format_arg_store` object that contains references to + arguments and can be implicitly converted to `~fmt::format_args`. `Context` + can be omitted in which case it defaults to `~fmt::format_context`. + See `~fmt::arg` for lifetime considerations. + \endrst + */ +// Arguments are taken by lvalue references to avoid some lifetime issues. +template +constexpr auto make_format_args(T&... args) + -> format_arg_store...> { + return {args...}; +} + +/** + \rst + Returns a named argument to be used in a formatting function. + It should only be used in a call to a formatting function or + `dynamic_format_arg_store::push_back`. + + **Example**:: + + fmt::print("Elapsed time: {s:.2f} seconds", fmt::arg("s", 1.23)); + \endrst + */ +template +inline auto arg(const Char* name, const T& arg) -> detail::named_arg { + static_assert(!detail::is_named_arg(), "nested named arguments"); + return {name, arg}; +} +FMT_END_EXPORT + +/** + \rst + A view of a collection of formatting arguments. To avoid lifetime issues it + should only be used as a parameter type in type-erased functions such as + ``vformat``:: + + void vlog(string_view format_str, format_args args); // OK + format_args args = make_format_args(); // Error: dangling reference + \endrst + */ +template class basic_format_args { + public: + using size_type = int; + using format_arg = basic_format_arg; + + private: + // A descriptor that contains information about formatting arguments. + // If the number of arguments is less or equal to max_packed_args then + // argument types are passed in the descriptor. This reduces binary code size + // per formatting function call. + unsigned long long desc_; + union { + // If is_packed() returns true then argument values are stored in values_; + // otherwise they are stored in args_. This is done to improve cache + // locality and reduce compiled code size since storing larger objects + // may require more code (at least on x86-64) even if the same amount of + // data is actually copied to stack. It saves ~10% on the bloat test. + const detail::value* values_; + const format_arg* args_; + }; + + constexpr auto is_packed() const -> bool { + return (desc_ & detail::is_unpacked_bit) == 0; + } + auto has_named_args() const -> bool { + return (desc_ & detail::has_named_args_bit) != 0; + } + + FMT_CONSTEXPR auto type(int index) const -> detail::type { + int shift = index * detail::packed_arg_bits; + unsigned int mask = (1 << detail::packed_arg_bits) - 1; + return static_cast((desc_ >> shift) & mask); + } + + constexpr FMT_INLINE basic_format_args(unsigned long long desc, + const detail::value* values) + : desc_(desc), values_(values) {} + constexpr basic_format_args(unsigned long long desc, const format_arg* args) + : desc_(desc), args_(args) {} + + public: + constexpr basic_format_args() : desc_(0), args_(nullptr) {} + + /** + \rst + Constructs a `basic_format_args` object from `~fmt::format_arg_store`. + \endrst + */ + template + constexpr FMT_INLINE basic_format_args( + const format_arg_store& store) + : basic_format_args(format_arg_store::desc, + store.data_.args()) {} + + /** + \rst + Constructs a `basic_format_args` object from + `~fmt::dynamic_format_arg_store`. + \endrst + */ + constexpr FMT_INLINE basic_format_args( + const dynamic_format_arg_store& store) + : basic_format_args(store.get_types(), store.data()) {} + + /** + \rst + Constructs a `basic_format_args` object from a dynamic set of arguments. + \endrst + */ + constexpr basic_format_args(const format_arg* args, int count) + : basic_format_args(detail::is_unpacked_bit | detail::to_unsigned(count), + args) {} + + /** Returns the argument with the specified id. */ + FMT_CONSTEXPR auto get(int id) const -> format_arg { + format_arg arg; + if (!is_packed()) { + if (id < max_size()) arg = args_[id]; + return arg; + } + if (id >= detail::max_packed_args) return arg; + arg.type_ = type(id); + if (arg.type_ == detail::type::none_type) return arg; + arg.value_ = values_[id]; + return arg; + } + + template + auto get(basic_string_view name) const -> format_arg { + int id = get_id(name); + return id >= 0 ? get(id) : format_arg(); + } + + template + auto get_id(basic_string_view name) const -> int { + if (!has_named_args()) return -1; + const auto& named_args = + (is_packed() ? values_[-1] : args_[-1].value_).named_args; + for (size_t i = 0; i < named_args.size; ++i) { + if (named_args.data[i].name == name) return named_args.data[i].id; + } + return -1; + } + + auto max_size() const -> int { + unsigned long long max_packed = detail::max_packed_args; + return static_cast(is_packed() ? max_packed + : desc_ & ~detail::is_unpacked_bit); + } +}; + +/** An alias to ``basic_format_args``. */ +// A separate type would result in shorter symbols but break ABI compatibility +// between clang and gcc on ARM (#1919). +FMT_EXPORT using format_args = basic_format_args; + +// We cannot use enum classes as bit fields because of a gcc bug, so we put them +// in namespaces instead (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61414). +// Additionally, if an underlying type is specified, older gcc incorrectly warns +// that the type is too small. Both bugs are fixed in gcc 9.3. +#if FMT_GCC_VERSION && FMT_GCC_VERSION < 903 +# define FMT_ENUM_UNDERLYING_TYPE(type) +#else +# define FMT_ENUM_UNDERLYING_TYPE(type) : type +#endif +namespace align { +enum type FMT_ENUM_UNDERLYING_TYPE(unsigned char){none, left, right, center, + numeric}; +} +using align_t = align::type; +namespace sign { +enum type FMT_ENUM_UNDERLYING_TYPE(unsigned char){none, minus, plus, space}; +} +using sign_t = sign::type; + +namespace detail { + +// Workaround an array initialization issue in gcc 4.8. +template struct fill_t { + private: + enum { max_size = 4 }; + Char data_[max_size] = {Char(' '), Char(0), Char(0), Char(0)}; + unsigned char size_ = 1; + + public: + FMT_CONSTEXPR void operator=(basic_string_view s) { + auto size = s.size(); + FMT_ASSERT(size <= max_size, "invalid fill"); + for (size_t i = 0; i < size; ++i) data_[i] = s[i]; + size_ = static_cast(size); + } + + constexpr auto size() const -> size_t { return size_; } + constexpr auto data() const -> const Char* { return data_; } + + FMT_CONSTEXPR auto operator[](size_t index) -> Char& { return data_[index]; } + FMT_CONSTEXPR auto operator[](size_t index) const -> const Char& { + return data_[index]; + } +}; +} // namespace detail + +enum class presentation_type : unsigned char { + none, + dec, // 'd' + oct, // 'o' + hex_lower, // 'x' + hex_upper, // 'X' + bin_lower, // 'b' + bin_upper, // 'B' + hexfloat_lower, // 'a' + hexfloat_upper, // 'A' + exp_lower, // 'e' + exp_upper, // 'E' + fixed_lower, // 'f' + fixed_upper, // 'F' + general_lower, // 'g' + general_upper, // 'G' + chr, // 'c' + string, // 's' + pointer, // 'p' + debug // '?' +}; + +// Format specifiers for built-in and string types. +template struct format_specs { + int width; + int precision; + presentation_type type; + align_t align : 4; + sign_t sign : 3; + bool alt : 1; // Alternate form ('#'). + bool localized : 1; + detail::fill_t fill; + + constexpr format_specs() + : width(0), + precision(-1), + type(presentation_type::none), + align(align::none), + sign(sign::none), + alt(false), + localized(false) {} +}; + +namespace detail { + +enum class arg_id_kind { none, index, name }; + +// An argument reference. +template struct arg_ref { + FMT_CONSTEXPR arg_ref() : kind(arg_id_kind::none), val() {} + + FMT_CONSTEXPR explicit arg_ref(int index) + : kind(arg_id_kind::index), val(index) {} + FMT_CONSTEXPR explicit arg_ref(basic_string_view name) + : kind(arg_id_kind::name), val(name) {} + + FMT_CONSTEXPR auto operator=(int idx) -> arg_ref& { + kind = arg_id_kind::index; + val.index = idx; + return *this; + } + + arg_id_kind kind; + union value { + FMT_CONSTEXPR value(int idx = 0) : index(idx) {} + FMT_CONSTEXPR value(basic_string_view n) : name(n) {} + + int index; + basic_string_view name; + } val; +}; + +// Format specifiers with width and precision resolved at formatting rather +// than parsing time to allow reusing the same parsed specifiers with +// different sets of arguments (precompilation of format strings). +template +struct dynamic_format_specs : format_specs { + arg_ref width_ref; + arg_ref precision_ref; +}; + +// Converts a character to ASCII. Returns '\0' on conversion failure. +template ::value)> +constexpr auto to_ascii(Char c) -> char { + return c <= 0xff ? static_cast(c) : '\0'; +} +template ::value)> +constexpr auto to_ascii(Char c) -> char { + return c <= 0xff ? static_cast(c) : '\0'; +} + +// Returns the number of code units in a code point or 1 on error. +template +FMT_CONSTEXPR auto code_point_length(const Char* begin) -> int { + if (const_check(sizeof(Char) != 1)) return 1; + auto c = static_cast(*begin); + return static_cast((0x3a55000000000000ull >> (2 * (c >> 3))) & 0x3) + 1; +} + +// Return the result via the out param to workaround gcc bug 77539. +template +FMT_CONSTEXPR auto find(Ptr first, Ptr last, T value, Ptr& out) -> bool { + for (out = first; out != last; ++out) { + if (*out == value) return true; + } + return false; +} + +template <> +inline auto find(const char* first, const char* last, char value, + const char*& out) -> bool { + out = static_cast( + std::memchr(first, value, to_unsigned(last - first))); + return out != nullptr; +} + +// Parses the range [begin, end) as an unsigned integer. This function assumes +// that the range is non-empty and the first character is a digit. +template +FMT_CONSTEXPR auto parse_nonnegative_int(const Char*& begin, const Char* end, + int error_value) noexcept -> int { + FMT_ASSERT(begin != end && '0' <= *begin && *begin <= '9', ""); + unsigned value = 0, prev = 0; + auto p = begin; + do { + prev = value; + value = value * 10 + unsigned(*p - '0'); + ++p; + } while (p != end && '0' <= *p && *p <= '9'); + auto num_digits = p - begin; + begin = p; + if (num_digits <= std::numeric_limits::digits10) + return static_cast(value); + // Check for overflow. + const unsigned max = to_unsigned((std::numeric_limits::max)()); + return num_digits == std::numeric_limits::digits10 + 1 && + prev * 10ull + unsigned(p[-1] - '0') <= max + ? static_cast(value) + : error_value; +} + +FMT_CONSTEXPR inline auto parse_align(char c) -> align_t { + switch (c) { + case '<': + return align::left; + case '>': + return align::right; + case '^': + return align::center; + } + return align::none; +} + +template constexpr auto is_name_start(Char c) -> bool { + return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || c == '_'; +} + +template +FMT_CONSTEXPR auto do_parse_arg_id(const Char* begin, const Char* end, + Handler&& handler) -> const Char* { + Char c = *begin; + if (c >= '0' && c <= '9') { + int index = 0; + constexpr int max = (std::numeric_limits::max)(); + if (c != '0') + index = parse_nonnegative_int(begin, end, max); + else + ++begin; + if (begin == end || (*begin != '}' && *begin != ':')) + throw_format_error("invalid format string"); + else + handler.on_index(index); + return begin; + } + if (!is_name_start(c)) { + throw_format_error("invalid format string"); + return begin; + } + auto it = begin; + do { + ++it; + } while (it != end && (is_name_start(*it) || ('0' <= *it && *it <= '9'))); + handler.on_name({begin, to_unsigned(it - begin)}); + return it; +} + +template +FMT_CONSTEXPR FMT_INLINE auto parse_arg_id(const Char* begin, const Char* end, + Handler&& handler) -> const Char* { + FMT_ASSERT(begin != end, ""); + Char c = *begin; + if (c != '}' && c != ':') return do_parse_arg_id(begin, end, handler); + handler.on_auto(); + return begin; +} + +template struct dynamic_spec_id_handler { + basic_format_parse_context& ctx; + arg_ref& ref; + + FMT_CONSTEXPR void on_auto() { + int id = ctx.next_arg_id(); + ref = arg_ref(id); + ctx.check_dynamic_spec(id); + } + FMT_CONSTEXPR void on_index(int id) { + ref = arg_ref(id); + ctx.check_arg_id(id); + ctx.check_dynamic_spec(id); + } + FMT_CONSTEXPR void on_name(basic_string_view id) { + ref = arg_ref(id); + ctx.check_arg_id(id); + } +}; + +// Parses [integer | "{" [arg_id] "}"]. +template +FMT_CONSTEXPR auto parse_dynamic_spec(const Char* begin, const Char* end, + int& value, arg_ref& ref, + basic_format_parse_context& ctx) + -> const Char* { + FMT_ASSERT(begin != end, ""); + if ('0' <= *begin && *begin <= '9') { + int val = parse_nonnegative_int(begin, end, -1); + if (val != -1) + value = val; + else + throw_format_error("number is too big"); + } else if (*begin == '{') { + ++begin; + auto handler = dynamic_spec_id_handler{ctx, ref}; + if (begin != end) begin = parse_arg_id(begin, end, handler); + if (begin != end && *begin == '}') return ++begin; + throw_format_error("invalid format string"); + } + return begin; +} + +template +FMT_CONSTEXPR auto parse_precision(const Char* begin, const Char* end, + int& value, arg_ref& ref, + basic_format_parse_context& ctx) + -> const Char* { + ++begin; + if (begin == end || *begin == '}') { + throw_format_error("invalid precision"); + return begin; + } + return parse_dynamic_spec(begin, end, value, ref, ctx); +} + +enum class state { start, align, sign, hash, zero, width, precision, locale }; + +// Parses standard format specifiers. +template +FMT_CONSTEXPR FMT_INLINE auto parse_format_specs( + const Char* begin, const Char* end, dynamic_format_specs& specs, + basic_format_parse_context& ctx, type arg_type) -> const Char* { + auto c = '\0'; + if (end - begin > 1) { + auto next = to_ascii(begin[1]); + c = parse_align(next) == align::none ? to_ascii(*begin) : '\0'; + } else { + if (begin == end) return begin; + c = to_ascii(*begin); + } + + struct { + state current_state = state::start; + FMT_CONSTEXPR void operator()(state s, bool valid = true) { + if (current_state >= s || !valid) + throw_format_error("invalid format specifier"); + current_state = s; + } + } enter_state; + + using pres = presentation_type; + constexpr auto integral_set = sint_set | uint_set | bool_set | char_set; + struct { + const Char*& begin; + dynamic_format_specs& specs; + type arg_type; + + FMT_CONSTEXPR auto operator()(pres pres_type, int set) -> const Char* { + if (!in(arg_type, set)) { + if (arg_type == type::none_type) return begin; + throw_format_error("invalid format specifier"); + } + specs.type = pres_type; + return begin + 1; + } + } parse_presentation_type{begin, specs, arg_type}; + + for (;;) { + switch (c) { + case '<': + case '>': + case '^': + enter_state(state::align); + specs.align = parse_align(c); + ++begin; + break; + case '+': + case '-': + case ' ': + if (arg_type == type::none_type) return begin; + enter_state(state::sign, in(arg_type, sint_set | float_set)); + switch (c) { + case '+': + specs.sign = sign::plus; + break; + case '-': + specs.sign = sign::minus; + break; + case ' ': + specs.sign = sign::space; + break; + } + ++begin; + break; + case '#': + if (arg_type == type::none_type) return begin; + enter_state(state::hash, is_arithmetic_type(arg_type)); + specs.alt = true; + ++begin; + break; + case '0': + enter_state(state::zero); + if (!is_arithmetic_type(arg_type)) { + if (arg_type == type::none_type) return begin; + throw_format_error("format specifier requires numeric argument"); + } + if (specs.align == align::none) { + // Ignore 0 if align is specified for compatibility with std::format. + specs.align = align::numeric; + specs.fill[0] = Char('0'); + } + ++begin; + break; + case '1': + case '2': + case '3': + case '4': + case '5': + case '6': + case '7': + case '8': + case '9': + case '{': + enter_state(state::width); + begin = parse_dynamic_spec(begin, end, specs.width, specs.width_ref, ctx); + break; + case '.': + if (arg_type == type::none_type) return begin; + enter_state(state::precision, + in(arg_type, float_set | string_set | cstring_set)); + begin = parse_precision(begin, end, specs.precision, specs.precision_ref, + ctx); + break; + case 'L': + if (arg_type == type::none_type) return begin; + enter_state(state::locale, is_arithmetic_type(arg_type)); + specs.localized = true; + ++begin; + break; + case 'd': + return parse_presentation_type(pres::dec, integral_set); + case 'o': + return parse_presentation_type(pres::oct, integral_set); + case 'x': + return parse_presentation_type(pres::hex_lower, integral_set); + case 'X': + return parse_presentation_type(pres::hex_upper, integral_set); + case 'b': + return parse_presentation_type(pres::bin_lower, integral_set); + case 'B': + return parse_presentation_type(pres::bin_upper, integral_set); + case 'a': + return parse_presentation_type(pres::hexfloat_lower, float_set); + case 'A': + return parse_presentation_type(pres::hexfloat_upper, float_set); + case 'e': + return parse_presentation_type(pres::exp_lower, float_set); + case 'E': + return parse_presentation_type(pres::exp_upper, float_set); + case 'f': + return parse_presentation_type(pres::fixed_lower, float_set); + case 'F': + return parse_presentation_type(pres::fixed_upper, float_set); + case 'g': + return parse_presentation_type(pres::general_lower, float_set); + case 'G': + return parse_presentation_type(pres::general_upper, float_set); + case 'c': + if (arg_type == type::bool_type) + throw_format_error("invalid format specifier"); + return parse_presentation_type(pres::chr, integral_set); + case 's': + return parse_presentation_type(pres::string, + bool_set | string_set | cstring_set); + case 'p': + return parse_presentation_type(pres::pointer, pointer_set | cstring_set); + case '?': + return parse_presentation_type(pres::debug, + char_set | string_set | cstring_set); + case '}': + return begin; + default: { + if (*begin == '}') return begin; + // Parse fill and alignment. + auto fill_end = begin + code_point_length(begin); + if (end - fill_end <= 0) { + throw_format_error("invalid format specifier"); + return begin; + } + if (*begin == '{') { + throw_format_error("invalid fill character '{'"); + return begin; + } + auto align = parse_align(to_ascii(*fill_end)); + enter_state(state::align, align != align::none); + specs.fill = {begin, to_unsigned(fill_end - begin)}; + specs.align = align; + begin = fill_end + 1; + } + } + if (begin == end) return begin; + c = to_ascii(*begin); + } +} + +template +FMT_CONSTEXPR auto parse_replacement_field(const Char* begin, const Char* end, + Handler&& handler) -> const Char* { + struct id_adapter { + Handler& handler; + int arg_id; + + FMT_CONSTEXPR void on_auto() { arg_id = handler.on_arg_id(); } + FMT_CONSTEXPR void on_index(int id) { arg_id = handler.on_arg_id(id); } + FMT_CONSTEXPR void on_name(basic_string_view id) { + arg_id = handler.on_arg_id(id); + } + }; + + ++begin; + if (begin == end) return handler.on_error("invalid format string"), end; + if (*begin == '}') { + handler.on_replacement_field(handler.on_arg_id(), begin); + } else if (*begin == '{') { + handler.on_text(begin, begin + 1); + } else { + auto adapter = id_adapter{handler, 0}; + begin = parse_arg_id(begin, end, adapter); + Char c = begin != end ? *begin : Char(); + if (c == '}') { + handler.on_replacement_field(adapter.arg_id, begin); + } else if (c == ':') { + begin = handler.on_format_specs(adapter.arg_id, begin + 1, end); + if (begin == end || *begin != '}') + return handler.on_error("unknown format specifier"), end; + } else { + return handler.on_error("missing '}' in format string"), end; + } + } + return begin + 1; +} + +template +FMT_CONSTEXPR FMT_INLINE void parse_format_string( + basic_string_view format_str, Handler&& handler) { + auto begin = format_str.data(); + auto end = begin + format_str.size(); + if (end - begin < 32) { + // Use a simple loop instead of memchr for small strings. + const Char* p = begin; + while (p != end) { + auto c = *p++; + if (c == '{') { + handler.on_text(begin, p - 1); + begin = p = parse_replacement_field(p - 1, end, handler); + } else if (c == '}') { + if (p == end || *p != '}') + return handler.on_error("unmatched '}' in format string"); + handler.on_text(begin, p); + begin = ++p; + } + } + handler.on_text(begin, end); + return; + } + struct writer { + FMT_CONSTEXPR void operator()(const Char* from, const Char* to) { + if (from == to) return; + for (;;) { + const Char* p = nullptr; + if (!find(from, to, Char('}'), p)) + return handler_.on_text(from, to); + ++p; + if (p == to || *p != '}') + return handler_.on_error("unmatched '}' in format string"); + handler_.on_text(from, p); + from = p + 1; + } + } + Handler& handler_; + } write = {handler}; + while (begin != end) { + // Doing two passes with memchr (one for '{' and another for '}') is up to + // 2.5x faster than the naive one-pass implementation on big format strings. + const Char* p = begin; + if (*begin != '{' && !find(begin + 1, end, Char('{'), p)) + return write(begin, end); + write(begin, p); + begin = parse_replacement_field(p, end, handler); + } +} + +template ::value> struct strip_named_arg { + using type = T; +}; +template struct strip_named_arg { + using type = remove_cvref_t; +}; + +template +FMT_CONSTEXPR auto parse_format_specs(ParseContext& ctx) + -> decltype(ctx.begin()) { + using char_type = typename ParseContext::char_type; + using context = buffer_context; + using mapped_type = conditional_t< + mapped_type_constant::value != type::custom_type, + decltype(arg_mapper().map(std::declval())), + typename strip_named_arg::type>; +#if defined(__cpp_if_constexpr) + if constexpr (std::is_default_constructible< + formatter>::value) { + return formatter().parse(ctx); + } else { + type_is_unformattable_for _; + return ctx.begin(); + } +#else + return formatter().parse(ctx); +#endif +} + +// Checks char specs and returns true iff the presentation type is char-like. +template +FMT_CONSTEXPR auto check_char_specs(const format_specs& specs) -> bool { + if (specs.type != presentation_type::none && + specs.type != presentation_type::chr && + specs.type != presentation_type::debug) { + return false; + } + if (specs.align == align::numeric || specs.sign != sign::none || specs.alt) + throw_format_error("invalid format specifier for char"); + return true; +} + +#if FMT_USE_NONTYPE_TEMPLATE_ARGS +template +constexpr auto get_arg_index_by_name(basic_string_view name) -> int { + if constexpr (is_statically_named_arg()) { + if (name == T::name) return N; + } + if constexpr (sizeof...(Args) > 0) + return get_arg_index_by_name(name); + (void)name; // Workaround an MSVC bug about "unused" parameter. + return -1; +} +#endif + +template +FMT_CONSTEXPR auto get_arg_index_by_name(basic_string_view name) -> int { +#if FMT_USE_NONTYPE_TEMPLATE_ARGS + if constexpr (sizeof...(Args) > 0) + return get_arg_index_by_name<0, Args...>(name); +#endif + (void)name; + return -1; +} + +template class format_string_checker { + private: + using parse_context_type = compile_parse_context; + static constexpr int num_args = sizeof...(Args); + + // Format specifier parsing function. + // In the future basic_format_parse_context will replace compile_parse_context + // here and will use is_constant_evaluated and downcasting to access the data + // needed for compile-time checks: https://godbolt.org/z/GvWzcTjh1. + using parse_func = const Char* (*)(parse_context_type&); + + type types_[num_args > 0 ? static_cast(num_args) : 1]; + parse_context_type context_; + parse_func parse_funcs_[num_args > 0 ? static_cast(num_args) : 1]; + + public: + explicit FMT_CONSTEXPR format_string_checker(basic_string_view fmt) + : types_{mapped_type_constant>::value...}, + context_(fmt, num_args, types_), + parse_funcs_{&parse_format_specs...} {} + + FMT_CONSTEXPR void on_text(const Char*, const Char*) {} + + FMT_CONSTEXPR auto on_arg_id() -> int { return context_.next_arg_id(); } + FMT_CONSTEXPR auto on_arg_id(int id) -> int { + return context_.check_arg_id(id), id; + } + FMT_CONSTEXPR auto on_arg_id(basic_string_view id) -> int { +#if FMT_USE_NONTYPE_TEMPLATE_ARGS + auto index = get_arg_index_by_name(id); + if (index < 0) on_error("named argument is not found"); + return index; +#else + (void)id; + on_error("compile-time checks for named arguments require C++20 support"); + return 0; +#endif + } + + FMT_CONSTEXPR void on_replacement_field(int id, const Char* begin) { + on_format_specs(id, begin, begin); // Call parse() on empty specs. + } + + FMT_CONSTEXPR auto on_format_specs(int id, const Char* begin, const Char*) + -> const Char* { + context_.advance_to(begin); + // id >= 0 check is a workaround for gcc 10 bug (#2065). + return id >= 0 && id < num_args ? parse_funcs_[id](context_) : begin; + } + + FMT_CONSTEXPR void on_error(const char* message) { + throw_format_error(message); + } +}; + +// Reports a compile-time error if S is not a valid format string. +template ::value)> +FMT_INLINE void check_format_string(const S&) { +#ifdef FMT_ENFORCE_COMPILE_STRING + static_assert(is_compile_string::value, + "FMT_ENFORCE_COMPILE_STRING requires all format strings to use " + "FMT_STRING."); +#endif +} +template ::value)> +void check_format_string(S format_str) { + using char_t = typename S::char_type; + FMT_CONSTEXPR auto s = basic_string_view(format_str); + using checker = format_string_checker...>; + FMT_CONSTEXPR bool error = (parse_format_string(s, checker(s)), true); + ignore_unused(error); +} + +template struct vformat_args { + using type = basic_format_args< + basic_format_context>, Char>>; +}; +template <> struct vformat_args { + using type = format_args; +}; + +// Use vformat_args and avoid type_identity to keep symbols short. +template +void vformat_to(buffer& buf, basic_string_view fmt, + typename vformat_args::type args, locale_ref loc = {}); + +FMT_API void vprint_mojibake(std::FILE*, string_view, format_args); +#ifndef _WIN32 +inline void vprint_mojibake(std::FILE*, string_view, format_args) {} +#endif +} // namespace detail + +FMT_BEGIN_EXPORT + +// A formatter specialization for natively supported types. +template +struct formatter::value != + detail::type::custom_type>> { + private: + detail::dynamic_format_specs specs_; + + public: + template + FMT_CONSTEXPR auto parse(ParseContext& ctx) -> const Char* { + auto type = detail::type_constant::value; + auto end = + detail::parse_format_specs(ctx.begin(), ctx.end(), specs_, ctx, type); + if (type == detail::type::char_type) detail::check_char_specs(specs_); + return end; + } + + template ::value, + FMT_ENABLE_IF(U == detail::type::string_type || + U == detail::type::cstring_type || + U == detail::type::char_type)> + FMT_CONSTEXPR void set_debug_format(bool set = true) { + specs_.type = set ? presentation_type::debug : presentation_type::none; + } + + template + FMT_CONSTEXPR auto format(const T& val, FormatContext& ctx) const + -> decltype(ctx.out()); +}; + +template struct runtime_format_string { + basic_string_view str; +}; + +/** A compile-time format string. */ +template class basic_format_string { + private: + basic_string_view str_; + + public: + template >::value)> + FMT_CONSTEVAL FMT_INLINE basic_format_string(const S& s) : str_(s) { + static_assert( + detail::count< + (std::is_base_of>::value && + std::is_reference::value)...>() == 0, + "passing views as lvalues is disallowed"); +#ifdef FMT_HAS_CONSTEVAL + if constexpr (detail::count_named_args() == + detail::count_statically_named_args()) { + using checker = + detail::format_string_checker...>; + detail::parse_format_string(str_, checker(s)); + } +#else + detail::check_format_string(s); +#endif + } + basic_format_string(runtime_format_string fmt) : str_(fmt.str) {} + + FMT_INLINE operator basic_string_view() const { return str_; } + FMT_INLINE auto get() const -> basic_string_view { return str_; } +}; + +#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409 +// Workaround broken conversion on older gcc. +template using format_string = string_view; +inline auto runtime(string_view s) -> string_view { return s; } +#else +template +using format_string = basic_format_string...>; +/** + \rst + Creates a runtime format string. + + **Example**:: + + // Check format string at runtime instead of compile-time. + fmt::print(fmt::runtime("{:d}"), "I am not a number"); + \endrst + */ +inline auto runtime(string_view s) -> runtime_format_string<> { return {{s}}; } +#endif + +FMT_API auto vformat(string_view fmt, format_args args) -> std::string; + +/** + \rst + Formats ``args`` according to specifications in ``fmt`` and returns the result + as a string. + + **Example**:: + + #include + std::string message = fmt::format("The answer is {}.", 42); + \endrst +*/ +template +FMT_NODISCARD FMT_INLINE auto format(format_string fmt, T&&... args) + -> std::string { + return vformat(fmt, fmt::make_format_args(args...)); +} + +/** Formats a string and writes the output to ``out``. */ +template ::value)> +auto vformat_to(OutputIt out, string_view fmt, format_args args) -> OutputIt { + auto&& buf = detail::get_buffer(out); + detail::vformat_to(buf, fmt, args, {}); + return detail::get_iterator(buf, out); +} + +/** + \rst + Formats ``args`` according to specifications in ``fmt``, writes the result to + the output iterator ``out`` and returns the iterator past the end of the output + range. `format_to` does not append a terminating null character. + + **Example**:: + + auto out = std::vector(); + fmt::format_to(std::back_inserter(out), "{}", 42); + \endrst + */ +template ::value)> +FMT_INLINE auto format_to(OutputIt out, format_string fmt, T&&... args) + -> OutputIt { + return vformat_to(out, fmt, fmt::make_format_args(args...)); +} + +template struct format_to_n_result { + /** Iterator past the end of the output range. */ + OutputIt out; + /** Total (not truncated) output size. */ + size_t size; +}; + +template ::value)> +auto vformat_to_n(OutputIt out, size_t n, string_view fmt, format_args args) + -> format_to_n_result { + using traits = detail::fixed_buffer_traits; + auto buf = detail::iterator_buffer(out, n); + detail::vformat_to(buf, fmt, args, {}); + return {buf.out(), buf.count()}; +} + +/** + \rst + Formats ``args`` according to specifications in ``fmt``, writes up to ``n`` + characters of the result to the output iterator ``out`` and returns the total + (not truncated) output size and the iterator past the end of the output range. + `format_to_n` does not append a terminating null character. + \endrst + */ +template ::value)> +FMT_INLINE auto format_to_n(OutputIt out, size_t n, format_string fmt, + T&&... args) -> format_to_n_result { + return vformat_to_n(out, n, fmt, fmt::make_format_args(args...)); +} + +/** Returns the number of chars in the output of ``format(fmt, args...)``. */ +template +FMT_NODISCARD FMT_INLINE auto formatted_size(format_string fmt, + T&&... args) -> size_t { + auto buf = detail::counting_buffer<>(); + detail::vformat_to(buf, fmt, fmt::make_format_args(args...), {}); + return buf.count(); +} + +FMT_API void vprint(string_view fmt, format_args args); +FMT_API void vprint(std::FILE* f, string_view fmt, format_args args); + +/** + \rst + Formats ``args`` according to specifications in ``fmt`` and writes the output + to ``stdout``. + + **Example**:: + + fmt::print("Elapsed time: {0:.2f} seconds", 1.23); + \endrst + */ +template +FMT_INLINE void print(format_string fmt, T&&... args) { + const auto& vargs = fmt::make_format_args(args...); + return detail::is_utf8() ? vprint(fmt, vargs) + : detail::vprint_mojibake(stdout, fmt, vargs); +} + +/** + \rst + Formats ``args`` according to specifications in ``fmt`` and writes the + output to the file ``f``. + + **Example**:: + + fmt::print(stderr, "Don't {}!", "panic"); + \endrst + */ +template +FMT_INLINE void print(std::FILE* f, format_string fmt, T&&... args) { + const auto& vargs = fmt::make_format_args(args...); + return detail::is_utf8() ? vprint(f, fmt, vargs) + : detail::vprint_mojibake(f, fmt, vargs); +} + +/** + Formats ``args`` according to specifications in ``fmt`` and writes the + output to the file ``f`` followed by a newline. + */ +template +FMT_INLINE void println(std::FILE* f, format_string fmt, T&&... args) { + return fmt::print(f, "{}\n", fmt::format(fmt, std::forward(args)...)); +} + +/** + Formats ``args`` according to specifications in ``fmt`` and writes the output + to ``stdout`` followed by a newline. + */ +template +FMT_INLINE void println(format_string fmt, T&&... args) { + return fmt::println(stdout, fmt, std::forward(args)...); +} + +FMT_END_EXPORT +FMT_GCC_PRAGMA("GCC pop_options") +FMT_END_NAMESPACE + +#ifdef FMT_HEADER_ONLY +# include "format.h" +#endif +#endif // FMT_CORE_H_ diff --git a/c/vendor/fmt/include/fmt/format-inl.h b/c/vendor/fmt/include/fmt/format-inl.h new file mode 100644 index 0000000000..efac5d1f88 --- /dev/null +++ b/c/vendor/fmt/include/fmt/format-inl.h @@ -0,0 +1,1678 @@ +// Formatting library for C++ - implementation +// +// Copyright (c) 2012 - 2016, Victor Zverovich +// All rights reserved. +// +// For the license information refer to format.h. + +#ifndef FMT_FORMAT_INL_H_ +#define FMT_FORMAT_INL_H_ + +#include +#include // errno +#include +#include +#include + +#ifndef FMT_STATIC_THOUSANDS_SEPARATOR +# include +#endif + +#if defined(_WIN32) && !defined(FMT_WINDOWS_NO_WCHAR) +# include // _isatty +#endif + +#include "format.h" + +FMT_BEGIN_NAMESPACE +namespace detail { + +FMT_FUNC void assert_fail(const char* file, int line, const char* message) { + // Use unchecked std::fprintf to avoid triggering another assertion when + // writing to stderr fails + std::fprintf(stderr, "%s:%d: assertion failed: %s", file, line, message); + // Chosen instead of std::abort to satisfy Clang in CUDA mode during device + // code pass. + std::terminate(); +} + +FMT_FUNC void throw_format_error(const char* message) { + FMT_THROW(format_error(message)); +} + +FMT_FUNC void format_error_code(detail::buffer& out, int error_code, + string_view message) noexcept { + // Report error code making sure that the output fits into + // inline_buffer_size to avoid dynamic memory allocation and potential + // bad_alloc. + out.try_resize(0); + static const char SEP[] = ": "; + static const char ERROR_STR[] = "error "; + // Subtract 2 to account for terminating null characters in SEP and ERROR_STR. + size_t error_code_size = sizeof(SEP) + sizeof(ERROR_STR) - 2; + auto abs_value = static_cast>(error_code); + if (detail::is_negative(error_code)) { + abs_value = 0 - abs_value; + ++error_code_size; + } + error_code_size += detail::to_unsigned(detail::count_digits(abs_value)); + auto it = buffer_appender(out); + if (message.size() <= inline_buffer_size - error_code_size) + fmt::format_to(it, FMT_STRING("{}{}"), message, SEP); + fmt::format_to(it, FMT_STRING("{}{}"), ERROR_STR, error_code); + FMT_ASSERT(out.size() <= inline_buffer_size, ""); +} + +FMT_FUNC void report_error(format_func func, int error_code, + const char* message) noexcept { + memory_buffer full_message; + func(full_message, error_code, message); + // Don't use fwrite_fully because the latter may throw. + if (std::fwrite(full_message.data(), full_message.size(), 1, stderr) > 0) + std::fputc('\n', stderr); +} + +// A wrapper around fwrite that throws on error. +inline void fwrite_fully(const void* ptr, size_t count, FILE* stream) { + size_t written = std::fwrite(ptr, 1, count, stream); + if (written < count) + FMT_THROW(system_error(errno, FMT_STRING("cannot write to file"))); +} + +#ifndef FMT_STATIC_THOUSANDS_SEPARATOR +template +locale_ref::locale_ref(const Locale& loc) : locale_(&loc) { + static_assert(std::is_same::value, ""); +} + +template auto locale_ref::get() const -> Locale { + static_assert(std::is_same::value, ""); + return locale_ ? *static_cast(locale_) : std::locale(); +} + +template +FMT_FUNC auto thousands_sep_impl(locale_ref loc) -> thousands_sep_result { + auto& facet = std::use_facet>(loc.get()); + auto grouping = facet.grouping(); + auto thousands_sep = grouping.empty() ? Char() : facet.thousands_sep(); + return {std::move(grouping), thousands_sep}; +} +template +FMT_FUNC auto decimal_point_impl(locale_ref loc) -> Char { + return std::use_facet>(loc.get()) + .decimal_point(); +} +#else +template +FMT_FUNC auto thousands_sep_impl(locale_ref) -> thousands_sep_result { + return {"\03", FMT_STATIC_THOUSANDS_SEPARATOR}; +} +template FMT_FUNC Char decimal_point_impl(locale_ref) { + return '.'; +} +#endif + +FMT_FUNC auto write_loc(appender out, loc_value value, + const format_specs<>& specs, locale_ref loc) -> bool { +#ifndef FMT_STATIC_THOUSANDS_SEPARATOR + auto locale = loc.get(); + // We cannot use the num_put facet because it may produce output in + // a wrong encoding. + using facet = format_facet; + if (std::has_facet(locale)) + return std::use_facet(locale).put(out, value, specs); + return facet(locale).put(out, value, specs); +#endif + return false; +} +} // namespace detail + +template typename Locale::id format_facet::id; + +#ifndef FMT_STATIC_THOUSANDS_SEPARATOR +template format_facet::format_facet(Locale& loc) { + auto& numpunct = std::use_facet>(loc); + grouping_ = numpunct.grouping(); + if (!grouping_.empty()) separator_ = std::string(1, numpunct.thousands_sep()); +} + +template <> +FMT_API FMT_FUNC auto format_facet::do_put( + appender out, loc_value val, const format_specs<>& specs) const -> bool { + return val.visit( + detail::loc_writer<>{out, specs, separator_, grouping_, decimal_point_}); +} +#endif + +FMT_FUNC auto vsystem_error(int error_code, string_view fmt, format_args args) + -> std::system_error { + auto ec = std::error_code(error_code, std::generic_category()); + return std::system_error(ec, vformat(fmt, args)); +} + +namespace detail { + +template +inline auto operator==(basic_fp x, basic_fp y) -> bool { + return x.f == y.f && x.e == y.e; +} + +// Compilers should be able to optimize this into the ror instruction. +FMT_CONSTEXPR inline auto rotr(uint32_t n, uint32_t r) noexcept -> uint32_t { + r &= 31; + return (n >> r) | (n << (32 - r)); +} +FMT_CONSTEXPR inline auto rotr(uint64_t n, uint32_t r) noexcept -> uint64_t { + r &= 63; + return (n >> r) | (n << (64 - r)); +} + +// Implementation of Dragonbox algorithm: https://github.com/jk-jeon/dragonbox. +namespace dragonbox { +// Computes upper 64 bits of multiplication of a 32-bit unsigned integer and a +// 64-bit unsigned integer. +inline auto umul96_upper64(uint32_t x, uint64_t y) noexcept -> uint64_t { + return umul128_upper64(static_cast(x) << 32, y); +} + +// Computes lower 128 bits of multiplication of a 64-bit unsigned integer and a +// 128-bit unsigned integer. +inline auto umul192_lower128(uint64_t x, uint128_fallback y) noexcept + -> uint128_fallback { + uint64_t high = x * y.high(); + uint128_fallback high_low = umul128(x, y.low()); + return {high + high_low.high(), high_low.low()}; +} + +// Computes lower 64 bits of multiplication of a 32-bit unsigned integer and a +// 64-bit unsigned integer. +inline auto umul96_lower64(uint32_t x, uint64_t y) noexcept -> uint64_t { + return x * y; +} + +// Various fast log computations. +inline auto floor_log10_pow2_minus_log10_4_over_3(int e) noexcept -> int { + FMT_ASSERT(e <= 2936 && e >= -2985, "too large exponent"); + return (e * 631305 - 261663) >> 21; +} + +FMT_INLINE_VARIABLE constexpr struct { + uint32_t divisor; + int shift_amount; +} div_small_pow10_infos[] = {{10, 16}, {100, 16}}; + +// Replaces n by floor(n / pow(10, N)) returning true if and only if n is +// divisible by pow(10, N). +// Precondition: n <= pow(10, N + 1). +template +auto check_divisibility_and_divide_by_pow10(uint32_t& n) noexcept -> bool { + // The numbers below are chosen such that: + // 1. floor(n/d) = floor(nm / 2^k) where d=10 or d=100, + // 2. nm mod 2^k < m if and only if n is divisible by d, + // where m is magic_number, k is shift_amount + // and d is divisor. + // + // Item 1 is a common technique of replacing division by a constant with + // multiplication, see e.g. "Division by Invariant Integers Using + // Multiplication" by Granlund and Montgomery (1994). magic_number (m) is set + // to ceil(2^k/d) for large enough k. + // The idea for item 2 originates from Schubfach. + constexpr auto info = div_small_pow10_infos[N - 1]; + FMT_ASSERT(n <= info.divisor * 10, "n is too large"); + constexpr uint32_t magic_number = + (1u << info.shift_amount) / info.divisor + 1; + n *= magic_number; + const uint32_t comparison_mask = (1u << info.shift_amount) - 1; + bool result = (n & comparison_mask) < magic_number; + n >>= info.shift_amount; + return result; +} + +// Computes floor(n / pow(10, N)) for small n and N. +// Precondition: n <= pow(10, N + 1). +template auto small_division_by_pow10(uint32_t n) noexcept -> uint32_t { + constexpr auto info = div_small_pow10_infos[N - 1]; + FMT_ASSERT(n <= info.divisor * 10, "n is too large"); + constexpr uint32_t magic_number = + (1u << info.shift_amount) / info.divisor + 1; + return (n * magic_number) >> info.shift_amount; +} + +// Computes floor(n / 10^(kappa + 1)) (float) +inline auto divide_by_10_to_kappa_plus_1(uint32_t n) noexcept -> uint32_t { + // 1374389535 = ceil(2^37/100) + return static_cast((static_cast(n) * 1374389535) >> 37); +} +// Computes floor(n / 10^(kappa + 1)) (double) +inline auto divide_by_10_to_kappa_plus_1(uint64_t n) noexcept -> uint64_t { + // 2361183241434822607 = ceil(2^(64+7)/1000) + return umul128_upper64(n, 2361183241434822607ull) >> 7; +} + +// Various subroutines using pow10 cache +template struct cache_accessor; + +template <> struct cache_accessor { + using carrier_uint = float_info::carrier_uint; + using cache_entry_type = uint64_t; + + static auto get_cached_power(int k) noexcept -> uint64_t { + FMT_ASSERT(k >= float_info::min_k && k <= float_info::max_k, + "k is out of range"); + static constexpr const uint64_t pow10_significands[] = { + 0x81ceb32c4b43fcf5, 0xa2425ff75e14fc32, 0xcad2f7f5359a3b3f, + 0xfd87b5f28300ca0e, 0x9e74d1b791e07e49, 0xc612062576589ddb, + 0xf79687aed3eec552, 0x9abe14cd44753b53, 0xc16d9a0095928a28, + 0xf1c90080baf72cb2, 0x971da05074da7bef, 0xbce5086492111aeb, + 0xec1e4a7db69561a6, 0x9392ee8e921d5d08, 0xb877aa3236a4b44a, + 0xe69594bec44de15c, 0x901d7cf73ab0acda, 0xb424dc35095cd810, + 0xe12e13424bb40e14, 0x8cbccc096f5088cc, 0xafebff0bcb24aaff, + 0xdbe6fecebdedd5bf, 0x89705f4136b4a598, 0xabcc77118461cefd, + 0xd6bf94d5e57a42bd, 0x8637bd05af6c69b6, 0xa7c5ac471b478424, + 0xd1b71758e219652c, 0x83126e978d4fdf3c, 0xa3d70a3d70a3d70b, + 0xcccccccccccccccd, 0x8000000000000000, 0xa000000000000000, + 0xc800000000000000, 0xfa00000000000000, 0x9c40000000000000, + 0xc350000000000000, 0xf424000000000000, 0x9896800000000000, + 0xbebc200000000000, 0xee6b280000000000, 0x9502f90000000000, + 0xba43b74000000000, 0xe8d4a51000000000, 0x9184e72a00000000, + 0xb5e620f480000000, 0xe35fa931a0000000, 0x8e1bc9bf04000000, + 0xb1a2bc2ec5000000, 0xde0b6b3a76400000, 0x8ac7230489e80000, + 0xad78ebc5ac620000, 0xd8d726b7177a8000, 0x878678326eac9000, + 0xa968163f0a57b400, 0xd3c21bcecceda100, 0x84595161401484a0, + 0xa56fa5b99019a5c8, 0xcecb8f27f4200f3a, 0x813f3978f8940985, + 0xa18f07d736b90be6, 0xc9f2c9cd04674edf, 0xfc6f7c4045812297, + 0x9dc5ada82b70b59e, 0xc5371912364ce306, 0xf684df56c3e01bc7, + 0x9a130b963a6c115d, 0xc097ce7bc90715b4, 0xf0bdc21abb48db21, + 0x96769950b50d88f5, 0xbc143fa4e250eb32, 0xeb194f8e1ae525fe, + 0x92efd1b8d0cf37bf, 0xb7abc627050305ae, 0xe596b7b0c643c71a, + 0x8f7e32ce7bea5c70, 0xb35dbf821ae4f38c, 0xe0352f62a19e306f}; + return pow10_significands[k - float_info::min_k]; + } + + struct compute_mul_result { + carrier_uint result; + bool is_integer; + }; + struct compute_mul_parity_result { + bool parity; + bool is_integer; + }; + + static auto compute_mul(carrier_uint u, + const cache_entry_type& cache) noexcept + -> compute_mul_result { + auto r = umul96_upper64(u, cache); + return {static_cast(r >> 32), + static_cast(r) == 0}; + } + + static auto compute_delta(const cache_entry_type& cache, int beta) noexcept + -> uint32_t { + return static_cast(cache >> (64 - 1 - beta)); + } + + static auto compute_mul_parity(carrier_uint two_f, + const cache_entry_type& cache, + int beta) noexcept + -> compute_mul_parity_result { + FMT_ASSERT(beta >= 1, ""); + FMT_ASSERT(beta < 64, ""); + + auto r = umul96_lower64(two_f, cache); + return {((r >> (64 - beta)) & 1) != 0, + static_cast(r >> (32 - beta)) == 0}; + } + + static auto compute_left_endpoint_for_shorter_interval_case( + const cache_entry_type& cache, int beta) noexcept -> carrier_uint { + return static_cast( + (cache - (cache >> (num_significand_bits() + 2))) >> + (64 - num_significand_bits() - 1 - beta)); + } + + static auto compute_right_endpoint_for_shorter_interval_case( + const cache_entry_type& cache, int beta) noexcept -> carrier_uint { + return static_cast( + (cache + (cache >> (num_significand_bits() + 1))) >> + (64 - num_significand_bits() - 1 - beta)); + } + + static auto compute_round_up_for_shorter_interval_case( + const cache_entry_type& cache, int beta) noexcept -> carrier_uint { + return (static_cast( + cache >> (64 - num_significand_bits() - 2 - beta)) + + 1) / + 2; + } +}; + +template <> struct cache_accessor { + using carrier_uint = float_info::carrier_uint; + using cache_entry_type = uint128_fallback; + + static auto get_cached_power(int k) noexcept -> uint128_fallback { + FMT_ASSERT(k >= float_info::min_k && k <= float_info::max_k, + "k is out of range"); + + static constexpr const uint128_fallback pow10_significands[] = { +#if FMT_USE_FULL_CACHE_DRAGONBOX + {0xff77b1fcbebcdc4f, 0x25e8e89c13bb0f7b}, + {0x9faacf3df73609b1, 0x77b191618c54e9ad}, + {0xc795830d75038c1d, 0xd59df5b9ef6a2418}, + {0xf97ae3d0d2446f25, 0x4b0573286b44ad1e}, + {0x9becce62836ac577, 0x4ee367f9430aec33}, + {0xc2e801fb244576d5, 0x229c41f793cda740}, + {0xf3a20279ed56d48a, 0x6b43527578c11110}, + {0x9845418c345644d6, 0x830a13896b78aaaa}, + {0xbe5691ef416bd60c, 0x23cc986bc656d554}, + {0xedec366b11c6cb8f, 0x2cbfbe86b7ec8aa9}, + {0x94b3a202eb1c3f39, 0x7bf7d71432f3d6aa}, + {0xb9e08a83a5e34f07, 0xdaf5ccd93fb0cc54}, + {0xe858ad248f5c22c9, 0xd1b3400f8f9cff69}, + {0x91376c36d99995be, 0x23100809b9c21fa2}, + {0xb58547448ffffb2d, 0xabd40a0c2832a78b}, + {0xe2e69915b3fff9f9, 0x16c90c8f323f516d}, + {0x8dd01fad907ffc3b, 0xae3da7d97f6792e4}, + {0xb1442798f49ffb4a, 0x99cd11cfdf41779d}, + {0xdd95317f31c7fa1d, 0x40405643d711d584}, + {0x8a7d3eef7f1cfc52, 0x482835ea666b2573}, + {0xad1c8eab5ee43b66, 0xda3243650005eed0}, + {0xd863b256369d4a40, 0x90bed43e40076a83}, + {0x873e4f75e2224e68, 0x5a7744a6e804a292}, + {0xa90de3535aaae202, 0x711515d0a205cb37}, + {0xd3515c2831559a83, 0x0d5a5b44ca873e04}, + {0x8412d9991ed58091, 0xe858790afe9486c3}, + {0xa5178fff668ae0b6, 0x626e974dbe39a873}, + {0xce5d73ff402d98e3, 0xfb0a3d212dc81290}, + {0x80fa687f881c7f8e, 0x7ce66634bc9d0b9a}, + {0xa139029f6a239f72, 0x1c1fffc1ebc44e81}, + {0xc987434744ac874e, 0xa327ffb266b56221}, + {0xfbe9141915d7a922, 0x4bf1ff9f0062baa9}, + {0x9d71ac8fada6c9b5, 0x6f773fc3603db4aa}, + {0xc4ce17b399107c22, 0xcb550fb4384d21d4}, + {0xf6019da07f549b2b, 0x7e2a53a146606a49}, + {0x99c102844f94e0fb, 0x2eda7444cbfc426e}, + {0xc0314325637a1939, 0xfa911155fefb5309}, + {0xf03d93eebc589f88, 0x793555ab7eba27cb}, + {0x96267c7535b763b5, 0x4bc1558b2f3458df}, + {0xbbb01b9283253ca2, 0x9eb1aaedfb016f17}, + {0xea9c227723ee8bcb, 0x465e15a979c1cadd}, + {0x92a1958a7675175f, 0x0bfacd89ec191eca}, + {0xb749faed14125d36, 0xcef980ec671f667c}, + {0xe51c79a85916f484, 0x82b7e12780e7401b}, + {0x8f31cc0937ae58d2, 0xd1b2ecb8b0908811}, + {0xb2fe3f0b8599ef07, 0x861fa7e6dcb4aa16}, + {0xdfbdcece67006ac9, 0x67a791e093e1d49b}, + {0x8bd6a141006042bd, 0xe0c8bb2c5c6d24e1}, + {0xaecc49914078536d, 0x58fae9f773886e19}, + {0xda7f5bf590966848, 0xaf39a475506a899f}, + {0x888f99797a5e012d, 0x6d8406c952429604}, + {0xaab37fd7d8f58178, 0xc8e5087ba6d33b84}, + {0xd5605fcdcf32e1d6, 0xfb1e4a9a90880a65}, + {0x855c3be0a17fcd26, 0x5cf2eea09a550680}, + {0xa6b34ad8c9dfc06f, 0xf42faa48c0ea481f}, + {0xd0601d8efc57b08b, 0xf13b94daf124da27}, + {0x823c12795db6ce57, 0x76c53d08d6b70859}, + {0xa2cb1717b52481ed, 0x54768c4b0c64ca6f}, + {0xcb7ddcdda26da268, 0xa9942f5dcf7dfd0a}, + {0xfe5d54150b090b02, 0xd3f93b35435d7c4d}, + {0x9efa548d26e5a6e1, 0xc47bc5014a1a6db0}, + {0xc6b8e9b0709f109a, 0x359ab6419ca1091c}, + {0xf867241c8cc6d4c0, 0xc30163d203c94b63}, + {0x9b407691d7fc44f8, 0x79e0de63425dcf1e}, + {0xc21094364dfb5636, 0x985915fc12f542e5}, + {0xf294b943e17a2bc4, 0x3e6f5b7b17b2939e}, + {0x979cf3ca6cec5b5a, 0xa705992ceecf9c43}, + {0xbd8430bd08277231, 0x50c6ff782a838354}, + {0xece53cec4a314ebd, 0xa4f8bf5635246429}, + {0x940f4613ae5ed136, 0x871b7795e136be9a}, + {0xb913179899f68584, 0x28e2557b59846e40}, + {0xe757dd7ec07426e5, 0x331aeada2fe589d0}, + {0x9096ea6f3848984f, 0x3ff0d2c85def7622}, + {0xb4bca50b065abe63, 0x0fed077a756b53aa}, + {0xe1ebce4dc7f16dfb, 0xd3e8495912c62895}, + {0x8d3360f09cf6e4bd, 0x64712dd7abbbd95d}, + {0xb080392cc4349dec, 0xbd8d794d96aacfb4}, + {0xdca04777f541c567, 0xecf0d7a0fc5583a1}, + {0x89e42caaf9491b60, 0xf41686c49db57245}, + {0xac5d37d5b79b6239, 0x311c2875c522ced6}, + {0xd77485cb25823ac7, 0x7d633293366b828c}, + {0x86a8d39ef77164bc, 0xae5dff9c02033198}, + {0xa8530886b54dbdeb, 0xd9f57f830283fdfd}, + {0xd267caa862a12d66, 0xd072df63c324fd7c}, + {0x8380dea93da4bc60, 0x4247cb9e59f71e6e}, + {0xa46116538d0deb78, 0x52d9be85f074e609}, + {0xcd795be870516656, 0x67902e276c921f8c}, + {0x806bd9714632dff6, 0x00ba1cd8a3db53b7}, + {0xa086cfcd97bf97f3, 0x80e8a40eccd228a5}, + {0xc8a883c0fdaf7df0, 0x6122cd128006b2ce}, + {0xfad2a4b13d1b5d6c, 0x796b805720085f82}, + {0x9cc3a6eec6311a63, 0xcbe3303674053bb1}, + {0xc3f490aa77bd60fc, 0xbedbfc4411068a9d}, + {0xf4f1b4d515acb93b, 0xee92fb5515482d45}, + {0x991711052d8bf3c5, 0x751bdd152d4d1c4b}, + {0xbf5cd54678eef0b6, 0xd262d45a78a0635e}, + {0xef340a98172aace4, 0x86fb897116c87c35}, + {0x9580869f0e7aac0e, 0xd45d35e6ae3d4da1}, + {0xbae0a846d2195712, 0x8974836059cca10a}, + {0xe998d258869facd7, 0x2bd1a438703fc94c}, + {0x91ff83775423cc06, 0x7b6306a34627ddd0}, + {0xb67f6455292cbf08, 0x1a3bc84c17b1d543}, + {0xe41f3d6a7377eeca, 0x20caba5f1d9e4a94}, + {0x8e938662882af53e, 0x547eb47b7282ee9d}, + {0xb23867fb2a35b28d, 0xe99e619a4f23aa44}, + {0xdec681f9f4c31f31, 0x6405fa00e2ec94d5}, + {0x8b3c113c38f9f37e, 0xde83bc408dd3dd05}, + {0xae0b158b4738705e, 0x9624ab50b148d446}, + {0xd98ddaee19068c76, 0x3badd624dd9b0958}, + {0x87f8a8d4cfa417c9, 0xe54ca5d70a80e5d7}, + {0xa9f6d30a038d1dbc, 0x5e9fcf4ccd211f4d}, + {0xd47487cc8470652b, 0x7647c32000696720}, + {0x84c8d4dfd2c63f3b, 0x29ecd9f40041e074}, + {0xa5fb0a17c777cf09, 0xf468107100525891}, + {0xcf79cc9db955c2cc, 0x7182148d4066eeb5}, + {0x81ac1fe293d599bf, 0xc6f14cd848405531}, + {0xa21727db38cb002f, 0xb8ada00e5a506a7d}, + {0xca9cf1d206fdc03b, 0xa6d90811f0e4851d}, + {0xfd442e4688bd304a, 0x908f4a166d1da664}, + {0x9e4a9cec15763e2e, 0x9a598e4e043287ff}, + {0xc5dd44271ad3cdba, 0x40eff1e1853f29fe}, + {0xf7549530e188c128, 0xd12bee59e68ef47d}, + {0x9a94dd3e8cf578b9, 0x82bb74f8301958cf}, + {0xc13a148e3032d6e7, 0xe36a52363c1faf02}, + {0xf18899b1bc3f8ca1, 0xdc44e6c3cb279ac2}, + {0x96f5600f15a7b7e5, 0x29ab103a5ef8c0ba}, + {0xbcb2b812db11a5de, 0x7415d448f6b6f0e8}, + {0xebdf661791d60f56, 0x111b495b3464ad22}, + {0x936b9fcebb25c995, 0xcab10dd900beec35}, + {0xb84687c269ef3bfb, 0x3d5d514f40eea743}, + {0xe65829b3046b0afa, 0x0cb4a5a3112a5113}, + {0x8ff71a0fe2c2e6dc, 0x47f0e785eaba72ac}, + {0xb3f4e093db73a093, 0x59ed216765690f57}, + {0xe0f218b8d25088b8, 0x306869c13ec3532d}, + {0x8c974f7383725573, 0x1e414218c73a13fc}, + {0xafbd2350644eeacf, 0xe5d1929ef90898fb}, + {0xdbac6c247d62a583, 0xdf45f746b74abf3a}, + {0x894bc396ce5da772, 0x6b8bba8c328eb784}, + {0xab9eb47c81f5114f, 0x066ea92f3f326565}, + {0xd686619ba27255a2, 0xc80a537b0efefebe}, + {0x8613fd0145877585, 0xbd06742ce95f5f37}, + {0xa798fc4196e952e7, 0x2c48113823b73705}, + {0xd17f3b51fca3a7a0, 0xf75a15862ca504c6}, + {0x82ef85133de648c4, 0x9a984d73dbe722fc}, + {0xa3ab66580d5fdaf5, 0xc13e60d0d2e0ebbb}, + {0xcc963fee10b7d1b3, 0x318df905079926a9}, + {0xffbbcfe994e5c61f, 0xfdf17746497f7053}, + {0x9fd561f1fd0f9bd3, 0xfeb6ea8bedefa634}, + {0xc7caba6e7c5382c8, 0xfe64a52ee96b8fc1}, + {0xf9bd690a1b68637b, 0x3dfdce7aa3c673b1}, + {0x9c1661a651213e2d, 0x06bea10ca65c084f}, + {0xc31bfa0fe5698db8, 0x486e494fcff30a63}, + {0xf3e2f893dec3f126, 0x5a89dba3c3efccfb}, + {0x986ddb5c6b3a76b7, 0xf89629465a75e01d}, + {0xbe89523386091465, 0xf6bbb397f1135824}, + {0xee2ba6c0678b597f, 0x746aa07ded582e2d}, + {0x94db483840b717ef, 0xa8c2a44eb4571cdd}, + {0xba121a4650e4ddeb, 0x92f34d62616ce414}, + {0xe896a0d7e51e1566, 0x77b020baf9c81d18}, + {0x915e2486ef32cd60, 0x0ace1474dc1d122f}, + {0xb5b5ada8aaff80b8, 0x0d819992132456bb}, + {0xe3231912d5bf60e6, 0x10e1fff697ed6c6a}, + {0x8df5efabc5979c8f, 0xca8d3ffa1ef463c2}, + {0xb1736b96b6fd83b3, 0xbd308ff8a6b17cb3}, + {0xddd0467c64bce4a0, 0xac7cb3f6d05ddbdf}, + {0x8aa22c0dbef60ee4, 0x6bcdf07a423aa96c}, + {0xad4ab7112eb3929d, 0x86c16c98d2c953c7}, + {0xd89d64d57a607744, 0xe871c7bf077ba8b8}, + {0x87625f056c7c4a8b, 0x11471cd764ad4973}, + {0xa93af6c6c79b5d2d, 0xd598e40d3dd89bd0}, + {0xd389b47879823479, 0x4aff1d108d4ec2c4}, + {0x843610cb4bf160cb, 0xcedf722a585139bb}, + {0xa54394fe1eedb8fe, 0xc2974eb4ee658829}, + {0xce947a3da6a9273e, 0x733d226229feea33}, + {0x811ccc668829b887, 0x0806357d5a3f5260}, + {0xa163ff802a3426a8, 0xca07c2dcb0cf26f8}, + {0xc9bcff6034c13052, 0xfc89b393dd02f0b6}, + {0xfc2c3f3841f17c67, 0xbbac2078d443ace3}, + {0x9d9ba7832936edc0, 0xd54b944b84aa4c0e}, + {0xc5029163f384a931, 0x0a9e795e65d4df12}, + {0xf64335bcf065d37d, 0x4d4617b5ff4a16d6}, + {0x99ea0196163fa42e, 0x504bced1bf8e4e46}, + {0xc06481fb9bcf8d39, 0xe45ec2862f71e1d7}, + {0xf07da27a82c37088, 0x5d767327bb4e5a4d}, + {0x964e858c91ba2655, 0x3a6a07f8d510f870}, + {0xbbe226efb628afea, 0x890489f70a55368c}, + {0xeadab0aba3b2dbe5, 0x2b45ac74ccea842f}, + {0x92c8ae6b464fc96f, 0x3b0b8bc90012929e}, + {0xb77ada0617e3bbcb, 0x09ce6ebb40173745}, + {0xe55990879ddcaabd, 0xcc420a6a101d0516}, + {0x8f57fa54c2a9eab6, 0x9fa946824a12232e}, + {0xb32df8e9f3546564, 0x47939822dc96abfa}, + {0xdff9772470297ebd, 0x59787e2b93bc56f8}, + {0x8bfbea76c619ef36, 0x57eb4edb3c55b65b}, + {0xaefae51477a06b03, 0xede622920b6b23f2}, + {0xdab99e59958885c4, 0xe95fab368e45ecee}, + {0x88b402f7fd75539b, 0x11dbcb0218ebb415}, + {0xaae103b5fcd2a881, 0xd652bdc29f26a11a}, + {0xd59944a37c0752a2, 0x4be76d3346f04960}, + {0x857fcae62d8493a5, 0x6f70a4400c562ddc}, + {0xa6dfbd9fb8e5b88e, 0xcb4ccd500f6bb953}, + {0xd097ad07a71f26b2, 0x7e2000a41346a7a8}, + {0x825ecc24c873782f, 0x8ed400668c0c28c9}, + {0xa2f67f2dfa90563b, 0x728900802f0f32fb}, + {0xcbb41ef979346bca, 0x4f2b40a03ad2ffba}, + {0xfea126b7d78186bc, 0xe2f610c84987bfa9}, + {0x9f24b832e6b0f436, 0x0dd9ca7d2df4d7ca}, + {0xc6ede63fa05d3143, 0x91503d1c79720dbc}, + {0xf8a95fcf88747d94, 0x75a44c6397ce912b}, + {0x9b69dbe1b548ce7c, 0xc986afbe3ee11abb}, + {0xc24452da229b021b, 0xfbe85badce996169}, + {0xf2d56790ab41c2a2, 0xfae27299423fb9c4}, + {0x97c560ba6b0919a5, 0xdccd879fc967d41b}, + {0xbdb6b8e905cb600f, 0x5400e987bbc1c921}, + {0xed246723473e3813, 0x290123e9aab23b69}, + {0x9436c0760c86e30b, 0xf9a0b6720aaf6522}, + {0xb94470938fa89bce, 0xf808e40e8d5b3e6a}, + {0xe7958cb87392c2c2, 0xb60b1d1230b20e05}, + {0x90bd77f3483bb9b9, 0xb1c6f22b5e6f48c3}, + {0xb4ecd5f01a4aa828, 0x1e38aeb6360b1af4}, + {0xe2280b6c20dd5232, 0x25c6da63c38de1b1}, + {0x8d590723948a535f, 0x579c487e5a38ad0f}, + {0xb0af48ec79ace837, 0x2d835a9df0c6d852}, + {0xdcdb1b2798182244, 0xf8e431456cf88e66}, + {0x8a08f0f8bf0f156b, 0x1b8e9ecb641b5900}, + {0xac8b2d36eed2dac5, 0xe272467e3d222f40}, + {0xd7adf884aa879177, 0x5b0ed81dcc6abb10}, + {0x86ccbb52ea94baea, 0x98e947129fc2b4ea}, + {0xa87fea27a539e9a5, 0x3f2398d747b36225}, + {0xd29fe4b18e88640e, 0x8eec7f0d19a03aae}, + {0x83a3eeeef9153e89, 0x1953cf68300424ad}, + {0xa48ceaaab75a8e2b, 0x5fa8c3423c052dd8}, + {0xcdb02555653131b6, 0x3792f412cb06794e}, + {0x808e17555f3ebf11, 0xe2bbd88bbee40bd1}, + {0xa0b19d2ab70e6ed6, 0x5b6aceaeae9d0ec5}, + {0xc8de047564d20a8b, 0xf245825a5a445276}, + {0xfb158592be068d2e, 0xeed6e2f0f0d56713}, + {0x9ced737bb6c4183d, 0x55464dd69685606c}, + {0xc428d05aa4751e4c, 0xaa97e14c3c26b887}, + {0xf53304714d9265df, 0xd53dd99f4b3066a9}, + {0x993fe2c6d07b7fab, 0xe546a8038efe402a}, + {0xbf8fdb78849a5f96, 0xde98520472bdd034}, + {0xef73d256a5c0f77c, 0x963e66858f6d4441}, + {0x95a8637627989aad, 0xdde7001379a44aa9}, + {0xbb127c53b17ec159, 0x5560c018580d5d53}, + {0xe9d71b689dde71af, 0xaab8f01e6e10b4a7}, + {0x9226712162ab070d, 0xcab3961304ca70e9}, + {0xb6b00d69bb55c8d1, 0x3d607b97c5fd0d23}, + {0xe45c10c42a2b3b05, 0x8cb89a7db77c506b}, + {0x8eb98a7a9a5b04e3, 0x77f3608e92adb243}, + {0xb267ed1940f1c61c, 0x55f038b237591ed4}, + {0xdf01e85f912e37a3, 0x6b6c46dec52f6689}, + {0x8b61313bbabce2c6, 0x2323ac4b3b3da016}, + {0xae397d8aa96c1b77, 0xabec975e0a0d081b}, + {0xd9c7dced53c72255, 0x96e7bd358c904a22}, + {0x881cea14545c7575, 0x7e50d64177da2e55}, + {0xaa242499697392d2, 0xdde50bd1d5d0b9ea}, + {0xd4ad2dbfc3d07787, 0x955e4ec64b44e865}, + {0x84ec3c97da624ab4, 0xbd5af13bef0b113f}, + {0xa6274bbdd0fadd61, 0xecb1ad8aeacdd58f}, + {0xcfb11ead453994ba, 0x67de18eda5814af3}, + {0x81ceb32c4b43fcf4, 0x80eacf948770ced8}, + {0xa2425ff75e14fc31, 0xa1258379a94d028e}, + {0xcad2f7f5359a3b3e, 0x096ee45813a04331}, + {0xfd87b5f28300ca0d, 0x8bca9d6e188853fd}, + {0x9e74d1b791e07e48, 0x775ea264cf55347e}, + {0xc612062576589dda, 0x95364afe032a819e}, + {0xf79687aed3eec551, 0x3a83ddbd83f52205}, + {0x9abe14cd44753b52, 0xc4926a9672793543}, + {0xc16d9a0095928a27, 0x75b7053c0f178294}, + {0xf1c90080baf72cb1, 0x5324c68b12dd6339}, + {0x971da05074da7bee, 0xd3f6fc16ebca5e04}, + {0xbce5086492111aea, 0x88f4bb1ca6bcf585}, + {0xec1e4a7db69561a5, 0x2b31e9e3d06c32e6}, + {0x9392ee8e921d5d07, 0x3aff322e62439fd0}, + {0xb877aa3236a4b449, 0x09befeb9fad487c3}, + {0xe69594bec44de15b, 0x4c2ebe687989a9b4}, + {0x901d7cf73ab0acd9, 0x0f9d37014bf60a11}, + {0xb424dc35095cd80f, 0x538484c19ef38c95}, + {0xe12e13424bb40e13, 0x2865a5f206b06fba}, + {0x8cbccc096f5088cb, 0xf93f87b7442e45d4}, + {0xafebff0bcb24aafe, 0xf78f69a51539d749}, + {0xdbe6fecebdedd5be, 0xb573440e5a884d1c}, + {0x89705f4136b4a597, 0x31680a88f8953031}, + {0xabcc77118461cefc, 0xfdc20d2b36ba7c3e}, + {0xd6bf94d5e57a42bc, 0x3d32907604691b4d}, + {0x8637bd05af6c69b5, 0xa63f9a49c2c1b110}, + {0xa7c5ac471b478423, 0x0fcf80dc33721d54}, + {0xd1b71758e219652b, 0xd3c36113404ea4a9}, + {0x83126e978d4fdf3b, 0x645a1cac083126ea}, + {0xa3d70a3d70a3d70a, 0x3d70a3d70a3d70a4}, + {0xcccccccccccccccc, 0xcccccccccccccccd}, + {0x8000000000000000, 0x0000000000000000}, + {0xa000000000000000, 0x0000000000000000}, + {0xc800000000000000, 0x0000000000000000}, + {0xfa00000000000000, 0x0000000000000000}, + {0x9c40000000000000, 0x0000000000000000}, + {0xc350000000000000, 0x0000000000000000}, + {0xf424000000000000, 0x0000000000000000}, + {0x9896800000000000, 0x0000000000000000}, + {0xbebc200000000000, 0x0000000000000000}, + {0xee6b280000000000, 0x0000000000000000}, + {0x9502f90000000000, 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0xdee033f26797b628}, + {0xfb9b7cd9a4a7443c, 0x169840ef017da3b2}, + {0x9d412e0806e88aa5, 0x8e1f289560ee864f}, + {0xc491798a08a2ad4e, 0xf1a6f2bab92a27e3}, + {0xf5b5d7ec8acb58a2, 0xae10af696774b1dc}, + {0x9991a6f3d6bf1765, 0xacca6da1e0a8ef2a}, + {0xbff610b0cc6edd3f, 0x17fd090a58d32af4}, + {0xeff394dcff8a948e, 0xddfc4b4cef07f5b1}, + {0x95f83d0a1fb69cd9, 0x4abdaf101564f98f}, + {0xbb764c4ca7a4440f, 0x9d6d1ad41abe37f2}, + {0xea53df5fd18d5513, 0x84c86189216dc5ee}, + {0x92746b9be2f8552c, 0x32fd3cf5b4e49bb5}, + {0xb7118682dbb66a77, 0x3fbc8c33221dc2a2}, + {0xe4d5e82392a40515, 0x0fabaf3feaa5334b}, + {0x8f05b1163ba6832d, 0x29cb4d87f2a7400f}, + {0xb2c71d5bca9023f8, 0x743e20e9ef511013}, + {0xdf78e4b2bd342cf6, 0x914da9246b255417}, + {0x8bab8eefb6409c1a, 0x1ad089b6c2f7548f}, + {0xae9672aba3d0c320, 0xa184ac2473b529b2}, + {0xda3c0f568cc4f3e8, 0xc9e5d72d90a2741f}, + {0x8865899617fb1871, 0x7e2fa67c7a658893}, + {0xaa7eebfb9df9de8d, 0xddbb901b98feeab8}, + {0xd51ea6fa85785631, 0x552a74227f3ea566}, + 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0xdb0b487b6423e1e9}, + {0xb049dc016abc5e5f, 0x91ce1a9a3d2cda63}, + {0xdc5c5301c56b75f7, 0x7641a140cc7810fc}, + {0x89b9b3e11b6329ba, 0xa9e904c87fcb0a9e}, + {0xac2820d9623bf429, 0x546345fa9fbdcd45}, + {0xd732290fbacaf133, 0xa97c177947ad4096}, + {0x867f59a9d4bed6c0, 0x49ed8eabcccc485e}, + {0xa81f301449ee8c70, 0x5c68f256bfff5a75}, + {0xd226fc195c6a2f8c, 0x73832eec6fff3112}, + {0x83585d8fd9c25db7, 0xc831fd53c5ff7eac}, + {0xa42e74f3d032f525, 0xba3e7ca8b77f5e56}, + {0xcd3a1230c43fb26f, 0x28ce1bd2e55f35ec}, + {0x80444b5e7aa7cf85, 0x7980d163cf5b81b4}, + {0xa0555e361951c366, 0xd7e105bcc3326220}, + {0xc86ab5c39fa63440, 0x8dd9472bf3fefaa8}, + {0xfa856334878fc150, 0xb14f98f6f0feb952}, + {0x9c935e00d4b9d8d2, 0x6ed1bf9a569f33d4}, + {0xc3b8358109e84f07, 0x0a862f80ec4700c9}, + {0xf4a642e14c6262c8, 0xcd27bb612758c0fb}, + {0x98e7e9cccfbd7dbd, 0x8038d51cb897789d}, + {0xbf21e44003acdd2c, 0xe0470a63e6bd56c4}, + {0xeeea5d5004981478, 0x1858ccfce06cac75}, + {0x95527a5202df0ccb, 0x0f37801e0c43ebc9}, + {0xbaa718e68396cffd, 0xd30560258f54e6bb}, + {0xe950df20247c83fd, 0x47c6b82ef32a206a}, + {0x91d28b7416cdd27e, 0x4cdc331d57fa5442}, + {0xb6472e511c81471d, 0xe0133fe4adf8e953}, + {0xe3d8f9e563a198e5, 0x58180fddd97723a7}, + {0x8e679c2f5e44ff8f, 0x570f09eaa7ea7649}, + {0xb201833b35d63f73, 0x2cd2cc6551e513db}, + {0xde81e40a034bcf4f, 0xf8077f7ea65e58d2}, + {0x8b112e86420f6191, 0xfb04afaf27faf783}, + {0xadd57a27d29339f6, 0x79c5db9af1f9b564}, + {0xd94ad8b1c7380874, 0x18375281ae7822bd}, + {0x87cec76f1c830548, 0x8f2293910d0b15b6}, + {0xa9c2794ae3a3c69a, 0xb2eb3875504ddb23}, + {0xd433179d9c8cb841, 0x5fa60692a46151ec}, + {0x849feec281d7f328, 0xdbc7c41ba6bcd334}, + {0xa5c7ea73224deff3, 0x12b9b522906c0801}, + {0xcf39e50feae16bef, 0xd768226b34870a01}, + {0x81842f29f2cce375, 0xe6a1158300d46641}, + {0xa1e53af46f801c53, 0x60495ae3c1097fd1}, + {0xca5e89b18b602368, 0x385bb19cb14bdfc5}, + {0xfcf62c1dee382c42, 0x46729e03dd9ed7b6}, + {0x9e19db92b4e31ba9, 0x6c07a2c26a8346d2}, + {0xc5a05277621be293, 0xc7098b7305241886}, + {0xf70867153aa2db38, 0xb8cbee4fc66d1ea8}, + {0x9a65406d44a5c903, 0x737f74f1dc043329}, + {0xc0fe908895cf3b44, 0x505f522e53053ff3}, + {0xf13e34aabb430a15, 0x647726b9e7c68ff0}, + {0x96c6e0eab509e64d, 0x5eca783430dc19f6}, + {0xbc789925624c5fe0, 0xb67d16413d132073}, + {0xeb96bf6ebadf77d8, 0xe41c5bd18c57e890}, + {0x933e37a534cbaae7, 0x8e91b962f7b6f15a}, + {0xb80dc58e81fe95a1, 0x723627bbb5a4adb1}, + {0xe61136f2227e3b09, 0xcec3b1aaa30dd91d}, + {0x8fcac257558ee4e6, 0x213a4f0aa5e8a7b2}, + {0xb3bd72ed2af29e1f, 0xa988e2cd4f62d19e}, + {0xe0accfa875af45a7, 0x93eb1b80a33b8606}, + {0x8c6c01c9498d8b88, 0xbc72f130660533c4}, + {0xaf87023b9bf0ee6a, 0xeb8fad7c7f8680b5}, + {0xdb68c2ca82ed2a05, 0xa67398db9f6820e2}, +#else + {0xff77b1fcbebcdc4f, 0x25e8e89c13bb0f7b}, + {0xce5d73ff402d98e3, 0xfb0a3d212dc81290}, + {0xa6b34ad8c9dfc06f, 0xf42faa48c0ea481f}, + {0x86a8d39ef77164bc, 0xae5dff9c02033198}, + {0xd98ddaee19068c76, 0x3badd624dd9b0958}, + {0xafbd2350644eeacf, 0xe5d1929ef90898fb}, + {0x8df5efabc5979c8f, 0xca8d3ffa1ef463c2}, + {0xe55990879ddcaabd, 0xcc420a6a101d0516}, + {0xb94470938fa89bce, 0xf808e40e8d5b3e6a}, + {0x95a8637627989aad, 0xdde7001379a44aa9}, + {0xf1c90080baf72cb1, 0x5324c68b12dd6339}, + {0xc350000000000000, 0x0000000000000000}, + {0x9dc5ada82b70b59d, 0xf020000000000000}, + {0xfee50b7025c36a08, 0x02f236d04753d5b5}, + {0xcde6fd5e09abcf26, 0xed4c0226b55e6f87}, + {0xa6539930bf6bff45, 0x84db8346b786151d}, + {0x865b86925b9bc5c2, 0x0b8a2392ba45a9b3}, + {0xd910f7ff28069da4, 0x1b2ba1518094da05}, + {0xaf58416654a6babb, 0x387ac8d1970027b3}, + {0x8da471a9de737e24, 0x5ceaecfed289e5d3}, + {0xe4d5e82392a40515, 0x0fabaf3feaa5334b}, + {0xb8da1662e7b00a17, 0x3d6a751f3b936244}, + {0x95527a5202df0ccb, 0x0f37801e0c43ebc9}, + {0xf13e34aabb430a15, 0x647726b9e7c68ff0} +#endif + }; + +#if FMT_USE_FULL_CACHE_DRAGONBOX + return pow10_significands[k - float_info::min_k]; +#else + static constexpr const uint64_t powers_of_5_64[] = { + 0x0000000000000001, 0x0000000000000005, 0x0000000000000019, + 0x000000000000007d, 0x0000000000000271, 0x0000000000000c35, + 0x0000000000003d09, 0x000000000001312d, 0x000000000005f5e1, + 0x00000000001dcd65, 0x00000000009502f9, 0x0000000002e90edd, + 0x000000000e8d4a51, 0x0000000048c27395, 0x000000016bcc41e9, + 0x000000071afd498d, 0x0000002386f26fc1, 0x000000b1a2bc2ec5, + 0x000003782dace9d9, 0x00001158e460913d, 0x000056bc75e2d631, + 0x0001b1ae4d6e2ef5, 0x000878678326eac9, 0x002a5a058fc295ed, + 0x00d3c21bcecceda1, 0x0422ca8b0a00a425, 0x14adf4b7320334b9}; + + static const int compression_ratio = 27; + + // Compute base index. + int cache_index = (k - float_info::min_k) / compression_ratio; + int kb = cache_index * compression_ratio + float_info::min_k; + int offset = k - kb; + + // Get base cache. + uint128_fallback base_cache = pow10_significands[cache_index]; + if (offset == 0) return base_cache; + + // Compute the required amount of bit-shift. + int alpha = floor_log2_pow10(kb + offset) - floor_log2_pow10(kb) - offset; + FMT_ASSERT(alpha > 0 && alpha < 64, "shifting error detected"); + + // Try to recover the real cache. + uint64_t pow5 = powers_of_5_64[offset]; + uint128_fallback recovered_cache = umul128(base_cache.high(), pow5); + uint128_fallback middle_low = umul128(base_cache.low(), pow5); + + recovered_cache += middle_low.high(); + + uint64_t high_to_middle = recovered_cache.high() << (64 - alpha); + uint64_t middle_to_low = recovered_cache.low() << (64 - alpha); + + recovered_cache = + uint128_fallback{(recovered_cache.low() >> alpha) | high_to_middle, + ((middle_low.low() >> alpha) | middle_to_low)}; + FMT_ASSERT(recovered_cache.low() + 1 != 0, ""); + return {recovered_cache.high(), recovered_cache.low() + 1}; +#endif + } + + struct compute_mul_result { + carrier_uint result; + bool is_integer; + }; + struct compute_mul_parity_result { + bool parity; + bool is_integer; + }; + + static auto compute_mul(carrier_uint u, + const cache_entry_type& cache) noexcept + -> compute_mul_result { + auto r = umul192_upper128(u, cache); + return {r.high(), r.low() == 0}; + } + + static auto compute_delta(cache_entry_type const& cache, int beta) noexcept + -> uint32_t { + return static_cast(cache.high() >> (64 - 1 - beta)); + } + + static auto compute_mul_parity(carrier_uint two_f, + const cache_entry_type& cache, + int beta) noexcept + -> compute_mul_parity_result { + FMT_ASSERT(beta >= 1, ""); + FMT_ASSERT(beta < 64, ""); + + auto r = umul192_lower128(two_f, cache); + return {((r.high() >> (64 - beta)) & 1) != 0, + ((r.high() << beta) | (r.low() >> (64 - beta))) == 0}; + } + + static auto compute_left_endpoint_for_shorter_interval_case( + const cache_entry_type& cache, int beta) noexcept -> carrier_uint { + return (cache.high() - + (cache.high() >> (num_significand_bits() + 2))) >> + (64 - num_significand_bits() - 1 - beta); + } + + static auto compute_right_endpoint_for_shorter_interval_case( + const cache_entry_type& cache, int beta) noexcept -> carrier_uint { + return (cache.high() + + (cache.high() >> (num_significand_bits() + 1))) >> + (64 - num_significand_bits() - 1 - beta); + } + + static auto compute_round_up_for_shorter_interval_case( + const cache_entry_type& cache, int beta) noexcept -> carrier_uint { + return ((cache.high() >> (64 - num_significand_bits() - 2 - beta)) + + 1) / + 2; + } +}; + +FMT_FUNC auto get_cached_power(int k) noexcept -> uint128_fallback { + return cache_accessor::get_cached_power(k); +} + +// Various integer checks +template +auto is_left_endpoint_integer_shorter_interval(int exponent) noexcept -> bool { + const int case_shorter_interval_left_endpoint_lower_threshold = 2; + const int case_shorter_interval_left_endpoint_upper_threshold = 3; + return exponent >= case_shorter_interval_left_endpoint_lower_threshold && + exponent <= case_shorter_interval_left_endpoint_upper_threshold; +} + +// Remove trailing zeros from n and return the number of zeros removed (float) +FMT_INLINE int remove_trailing_zeros(uint32_t& n, int s = 0) noexcept { + FMT_ASSERT(n != 0, ""); + // Modular inverse of 5 (mod 2^32): (mod_inv_5 * 5) mod 2^32 = 1. + constexpr uint32_t mod_inv_5 = 0xcccccccd; + constexpr uint32_t mod_inv_25 = 0xc28f5c29; // = mod_inv_5 * mod_inv_5 + + while (true) { + auto q = rotr(n * mod_inv_25, 2); + if (q > max_value() / 100) break; + n = q; + s += 2; + } + auto q = rotr(n * mod_inv_5, 1); + if (q <= max_value() / 10) { + n = q; + s |= 1; + } + return s; +} + +// Removes trailing zeros and returns the number of zeros removed (double) +FMT_INLINE int remove_trailing_zeros(uint64_t& n) noexcept { + FMT_ASSERT(n != 0, ""); + + // This magic number is ceil(2^90 / 10^8). + constexpr uint64_t magic_number = 12379400392853802749ull; + auto nm = umul128(n, magic_number); + + // Is n is divisible by 10^8? + if ((nm.high() & ((1ull << (90 - 64)) - 1)) == 0 && nm.low() < magic_number) { + // If yes, work with the quotient... + auto n32 = static_cast(nm.high() >> (90 - 64)); + // ... and use the 32 bit variant of the function + int s = remove_trailing_zeros(n32, 8); + n = n32; + return s; + } + + // If n is not divisible by 10^8, work with n itself. + constexpr uint64_t mod_inv_5 = 0xcccccccccccccccd; + constexpr uint64_t mod_inv_25 = 0x8f5c28f5c28f5c29; // mod_inv_5 * mod_inv_5 + + int s = 0; + while (true) { + auto q = rotr(n * mod_inv_25, 2); + if (q > max_value() / 100) break; + n = q; + s += 2; + } + auto q = rotr(n * mod_inv_5, 1); + if (q <= max_value() / 10) { + n = q; + s |= 1; + } + + return s; +} + +// The main algorithm for shorter interval case +template +FMT_INLINE decimal_fp shorter_interval_case(int exponent) noexcept { + decimal_fp ret_value; + // Compute k and beta + const int minus_k = floor_log10_pow2_minus_log10_4_over_3(exponent); + const int beta = exponent + floor_log2_pow10(-minus_k); + + // Compute xi and zi + using cache_entry_type = typename cache_accessor::cache_entry_type; + const cache_entry_type cache = cache_accessor::get_cached_power(-minus_k); + + auto xi = cache_accessor::compute_left_endpoint_for_shorter_interval_case( + cache, beta); + auto zi = cache_accessor::compute_right_endpoint_for_shorter_interval_case( + cache, beta); + + // If the left endpoint is not an integer, increase it + if (!is_left_endpoint_integer_shorter_interval(exponent)) ++xi; + + // Try bigger divisor + ret_value.significand = zi / 10; + + // If succeed, remove trailing zeros if necessary and return + if (ret_value.significand * 10 >= xi) { + ret_value.exponent = minus_k + 1; + ret_value.exponent += remove_trailing_zeros(ret_value.significand); + return ret_value; + } + + // Otherwise, compute the round-up of y + ret_value.significand = + cache_accessor::compute_round_up_for_shorter_interval_case(cache, + beta); + ret_value.exponent = minus_k; + + // When tie occurs, choose one of them according to the rule + if (exponent >= float_info::shorter_interval_tie_lower_threshold && + exponent <= float_info::shorter_interval_tie_upper_threshold) { + ret_value.significand = ret_value.significand % 2 == 0 + ? ret_value.significand + : ret_value.significand - 1; + } else if (ret_value.significand < xi) { + ++ret_value.significand; + } + return ret_value; +} + +template auto to_decimal(T x) noexcept -> decimal_fp { + // Step 1: integer promotion & Schubfach multiplier calculation. + + using carrier_uint = typename float_info::carrier_uint; + using cache_entry_type = typename cache_accessor::cache_entry_type; + auto br = bit_cast(x); + + // Extract significand bits and exponent bits. + const carrier_uint significand_mask = + (static_cast(1) << num_significand_bits()) - 1; + carrier_uint significand = (br & significand_mask); + int exponent = + static_cast((br & exponent_mask()) >> num_significand_bits()); + + if (exponent != 0) { // Check if normal. + exponent -= exponent_bias() + num_significand_bits(); + + // Shorter interval case; proceed like Schubfach. + // In fact, when exponent == 1 and significand == 0, the interval is + // regular. However, it can be shown that the end-results are anyway same. + if (significand == 0) return shorter_interval_case(exponent); + + significand |= (static_cast(1) << num_significand_bits()); + } else { + // Subnormal case; the interval is always regular. + if (significand == 0) return {0, 0}; + exponent = + std::numeric_limits::min_exponent - num_significand_bits() - 1; + } + + const bool include_left_endpoint = (significand % 2 == 0); + const bool include_right_endpoint = include_left_endpoint; + + // Compute k and beta. + const int minus_k = floor_log10_pow2(exponent) - float_info::kappa; + const cache_entry_type cache = cache_accessor::get_cached_power(-minus_k); + const int beta = exponent + floor_log2_pow10(-minus_k); + + // Compute zi and deltai. + // 10^kappa <= deltai < 10^(kappa + 1) + const uint32_t deltai = cache_accessor::compute_delta(cache, beta); + const carrier_uint two_fc = significand << 1; + + // For the case of binary32, the result of integer check is not correct for + // 29711844 * 2^-82 + // = 6.1442653300000000008655037797566933477355632930994033813476... * 10^-18 + // and 29711844 * 2^-81 + // = 1.2288530660000000001731007559513386695471126586198806762695... * 10^-17, + // and they are the unique counterexamples. However, since 29711844 is even, + // this does not cause any problem for the endpoints calculations; it can only + // cause a problem when we need to perform integer check for the center. + // Fortunately, with these inputs, that branch is never executed, so we are + // fine. + const typename cache_accessor::compute_mul_result z_mul = + cache_accessor::compute_mul((two_fc | 1) << beta, cache); + + // Step 2: Try larger divisor; remove trailing zeros if necessary. + + // Using an upper bound on zi, we might be able to optimize the division + // better than the compiler; we are computing zi / big_divisor here. + decimal_fp ret_value; + ret_value.significand = divide_by_10_to_kappa_plus_1(z_mul.result); + uint32_t r = static_cast(z_mul.result - float_info::big_divisor * + ret_value.significand); + + if (r < deltai) { + // Exclude the right endpoint if necessary. + if (r == 0 && (z_mul.is_integer & !include_right_endpoint)) { + --ret_value.significand; + r = float_info::big_divisor; + goto small_divisor_case_label; + } + } else if (r > deltai) { + goto small_divisor_case_label; + } else { + // r == deltai; compare fractional parts. + const typename cache_accessor::compute_mul_parity_result x_mul = + cache_accessor::compute_mul_parity(two_fc - 1, cache, beta); + + if (!(x_mul.parity | (x_mul.is_integer & include_left_endpoint))) + goto small_divisor_case_label; + } + ret_value.exponent = minus_k + float_info::kappa + 1; + + // We may need to remove trailing zeros. + ret_value.exponent += remove_trailing_zeros(ret_value.significand); + return ret_value; + + // Step 3: Find the significand with the smaller divisor. + +small_divisor_case_label: + ret_value.significand *= 10; + ret_value.exponent = minus_k + float_info::kappa; + + uint32_t dist = r - (deltai / 2) + (float_info::small_divisor / 2); + const bool approx_y_parity = + ((dist ^ (float_info::small_divisor / 2)) & 1) != 0; + + // Is dist divisible by 10^kappa? + const bool divisible_by_small_divisor = + check_divisibility_and_divide_by_pow10::kappa>(dist); + + // Add dist / 10^kappa to the significand. + ret_value.significand += dist; + + if (!divisible_by_small_divisor) return ret_value; + + // Check z^(f) >= epsilon^(f). + // We have either yi == zi - epsiloni or yi == (zi - epsiloni) - 1, + // where yi == zi - epsiloni if and only if z^(f) >= epsilon^(f). + // Since there are only 2 possibilities, we only need to care about the + // parity. Also, zi and r should have the same parity since the divisor + // is an even number. + const auto y_mul = cache_accessor::compute_mul_parity(two_fc, cache, beta); + + // If z^(f) >= epsilon^(f), we might have a tie when z^(f) == epsilon^(f), + // or equivalently, when y is an integer. + if (y_mul.parity != approx_y_parity) + --ret_value.significand; + else if (y_mul.is_integer & (ret_value.significand % 2 != 0)) + --ret_value.significand; + return ret_value; +} +} // namespace dragonbox +} // namespace detail + +template <> struct formatter { + FMT_CONSTEXPR auto parse(format_parse_context& ctx) + -> format_parse_context::iterator { + return ctx.begin(); + } + + auto format(const detail::bigint& n, format_context& ctx) const + -> format_context::iterator { + auto out = ctx.out(); + bool first = true; + for (auto i = n.bigits_.size(); i > 0; --i) { + auto value = n.bigits_[i - 1u]; + if (first) { + out = fmt::format_to(out, FMT_STRING("{:x}"), value); + first = false; + continue; + } + out = fmt::format_to(out, FMT_STRING("{:08x}"), value); + } + if (n.exp_ > 0) + out = fmt::format_to(out, FMT_STRING("p{}"), + n.exp_ * detail::bigint::bigit_bits); + return out; + } +}; + +FMT_FUNC detail::utf8_to_utf16::utf8_to_utf16(string_view s) { + for_each_codepoint(s, [this](uint32_t cp, string_view) { + if (cp == invalid_code_point) FMT_THROW(std::runtime_error("invalid utf8")); + if (cp <= 0xFFFF) { + buffer_.push_back(static_cast(cp)); + } else { + cp -= 0x10000; + buffer_.push_back(static_cast(0xD800 + (cp >> 10))); + buffer_.push_back(static_cast(0xDC00 + (cp & 0x3FF))); + } + return true; + }); + buffer_.push_back(0); +} + +FMT_FUNC void format_system_error(detail::buffer& out, int error_code, + const char* message) noexcept { + FMT_TRY { + auto ec = std::error_code(error_code, std::generic_category()); + write(std::back_inserter(out), std::system_error(ec, message).what()); + return; + } + FMT_CATCH(...) {} + format_error_code(out, error_code, message); +} + +FMT_FUNC void report_system_error(int error_code, + const char* message) noexcept { + report_error(format_system_error, error_code, message); +} + +FMT_FUNC auto vformat(string_view fmt, format_args args) -> std::string { + // Don't optimize the "{}" case to keep the binary size small and because it + // can be better optimized in fmt::format anyway. + auto buffer = memory_buffer(); + detail::vformat_to(buffer, fmt, args); + return to_string(buffer); +} + +namespace detail { +#if !defined(_WIN32) || defined(FMT_WINDOWS_NO_WCHAR) +FMT_FUNC auto write_console(int, string_view) -> bool { return false; } +FMT_FUNC auto write_console(std::FILE*, string_view) -> bool { return false; } +#else +using dword = conditional_t; +extern "C" __declspec(dllimport) int __stdcall WriteConsoleW( // + void*, const void*, dword, dword*, void*); + +FMT_FUNC bool write_console(int fd, string_view text) { + auto u16 = utf8_to_utf16(text); + return WriteConsoleW(reinterpret_cast(_get_osfhandle(fd)), u16.c_str(), + static_cast(u16.size()), nullptr, nullptr) != 0; +} + +FMT_FUNC auto write_console(std::FILE* f, string_view text) -> bool { + return write_console(_fileno(f), text); +} +#endif + +#ifdef _WIN32 +// Print assuming legacy (non-Unicode) encoding. +FMT_FUNC void vprint_mojibake(std::FILE* f, string_view fmt, format_args args) { + auto buffer = memory_buffer(); + detail::vformat_to(buffer, fmt, args); + fwrite_fully(buffer.data(), buffer.size(), f); +} +#endif + +FMT_FUNC void print(std::FILE* f, string_view text) { +#ifdef _WIN32 + int fd = _fileno(f); + if (_isatty(fd)) { + std::fflush(f); + if (write_console(fd, text)) return; + } +#endif + fwrite_fully(text.data(), text.size(), f); +} +} // namespace detail + +FMT_FUNC void vprint(std::FILE* f, string_view fmt, format_args args) { + auto buffer = memory_buffer(); + detail::vformat_to(buffer, fmt, args); + detail::print(f, {buffer.data(), buffer.size()}); +} + +FMT_FUNC void vprint(string_view fmt, format_args args) { + vprint(stdout, fmt, args); +} + +namespace detail { + +struct singleton { + unsigned char upper; + unsigned char lower_count; +}; + +inline auto is_printable(uint16_t x, const singleton* singletons, + size_t singletons_size, + const unsigned char* singleton_lowers, + const unsigned char* normal, size_t normal_size) + -> bool { + auto upper = x >> 8; + auto lower_start = 0; + for (size_t i = 0; i < singletons_size; ++i) { + auto s = singletons[i]; + auto lower_end = lower_start + s.lower_count; + if (upper < s.upper) break; + if (upper == s.upper) { + for (auto j = lower_start; j < lower_end; ++j) { + if (singleton_lowers[j] == (x & 0xff)) return false; + } + } + lower_start = lower_end; + } + + auto xsigned = static_cast(x); + auto current = true; + for (size_t i = 0; i < normal_size; ++i) { + auto v = static_cast(normal[i]); + auto len = (v & 0x80) != 0 ? (v & 0x7f) << 8 | normal[++i] : v; + xsigned -= len; + if (xsigned < 0) break; + current = !current; + } + return current; +} + +// This code is generated by support/printable.py. +FMT_FUNC auto is_printable(uint32_t cp) -> bool { + static constexpr singleton singletons0[] = { + {0x00, 1}, {0x03, 5}, {0x05, 6}, {0x06, 3}, {0x07, 6}, {0x08, 8}, + {0x09, 17}, {0x0a, 28}, {0x0b, 25}, {0x0c, 20}, {0x0d, 16}, {0x0e, 13}, + {0x0f, 4}, {0x10, 3}, {0x12, 18}, {0x13, 9}, {0x16, 1}, {0x17, 5}, + {0x18, 2}, {0x19, 3}, {0x1a, 7}, {0x1c, 2}, {0x1d, 1}, {0x1f, 22}, + {0x20, 3}, {0x2b, 3}, {0x2c, 2}, {0x2d, 11}, {0x2e, 1}, {0x30, 3}, + {0x31, 2}, {0x32, 1}, {0xa7, 2}, {0xa9, 2}, {0xaa, 4}, {0xab, 8}, + {0xfa, 2}, {0xfb, 5}, {0xfd, 4}, {0xfe, 3}, {0xff, 9}, + }; + static constexpr unsigned char singletons0_lower[] = { + 0xad, 0x78, 0x79, 0x8b, 0x8d, 0xa2, 0x30, 0x57, 0x58, 0x8b, 0x8c, 0x90, + 0x1c, 0x1d, 0xdd, 0x0e, 0x0f, 0x4b, 0x4c, 0xfb, 0xfc, 0x2e, 0x2f, 0x3f, + 0x5c, 0x5d, 0x5f, 0xb5, 0xe2, 0x84, 0x8d, 0x8e, 0x91, 0x92, 0xa9, 0xb1, + 0xba, 0xbb, 0xc5, 0xc6, 0xc9, 0xca, 0xde, 0xe4, 0xe5, 0xff, 0x00, 0x04, + 0x11, 0x12, 0x29, 0x31, 0x34, 0x37, 0x3a, 0x3b, 0x3d, 0x49, 0x4a, 0x5d, + 0x84, 0x8e, 0x92, 0xa9, 0xb1, 0xb4, 0xba, 0xbb, 0xc6, 0xca, 0xce, 0xcf, + 0xe4, 0xe5, 0x00, 0x04, 0x0d, 0x0e, 0x11, 0x12, 0x29, 0x31, 0x34, 0x3a, + 0x3b, 0x45, 0x46, 0x49, 0x4a, 0x5e, 0x64, 0x65, 0x84, 0x91, 0x9b, 0x9d, + 0xc9, 0xce, 0xcf, 0x0d, 0x11, 0x29, 0x45, 0x49, 0x57, 0x64, 0x65, 0x8d, + 0x91, 0xa9, 0xb4, 0xba, 0xbb, 0xc5, 0xc9, 0xdf, 0xe4, 0xe5, 0xf0, 0x0d, + 0x11, 0x45, 0x49, 0x64, 0x65, 0x80, 0x84, 0xb2, 0xbc, 0xbe, 0xbf, 0xd5, + 0xd7, 0xf0, 0xf1, 0x83, 0x85, 0x8b, 0xa4, 0xa6, 0xbe, 0xbf, 0xc5, 0xc7, + 0xce, 0xcf, 0xda, 0xdb, 0x48, 0x98, 0xbd, 0xcd, 0xc6, 0xce, 0xcf, 0x49, + 0x4e, 0x4f, 0x57, 0x59, 0x5e, 0x5f, 0x89, 0x8e, 0x8f, 0xb1, 0xb6, 0xb7, + 0xbf, 0xc1, 0xc6, 0xc7, 0xd7, 0x11, 0x16, 0x17, 0x5b, 0x5c, 0xf6, 0xf7, + 0xfe, 0xff, 0x80, 0x0d, 0x6d, 0x71, 0xde, 0xdf, 0x0e, 0x0f, 0x1f, 0x6e, + 0x6f, 0x1c, 0x1d, 0x5f, 0x7d, 0x7e, 0xae, 0xaf, 0xbb, 0xbc, 0xfa, 0x16, + 0x17, 0x1e, 0x1f, 0x46, 0x47, 0x4e, 0x4f, 0x58, 0x5a, 0x5c, 0x5e, 0x7e, + 0x7f, 0xb5, 0xc5, 0xd4, 0xd5, 0xdc, 0xf0, 0xf1, 0xf5, 0x72, 0x73, 0x8f, + 0x74, 0x75, 0x96, 0x2f, 0x5f, 0x26, 0x2e, 0x2f, 0xa7, 0xaf, 0xb7, 0xbf, + 0xc7, 0xcf, 0xd7, 0xdf, 0x9a, 0x40, 0x97, 0x98, 0x30, 0x8f, 0x1f, 0xc0, + 0xc1, 0xce, 0xff, 0x4e, 0x4f, 0x5a, 0x5b, 0x07, 0x08, 0x0f, 0x10, 0x27, + 0x2f, 0xee, 0xef, 0x6e, 0x6f, 0x37, 0x3d, 0x3f, 0x42, 0x45, 0x90, 0x91, + 0xfe, 0xff, 0x53, 0x67, 0x75, 0xc8, 0xc9, 0xd0, 0xd1, 0xd8, 0xd9, 0xe7, + 0xfe, 0xff, + }; + static constexpr singleton singletons1[] = { + {0x00, 6}, {0x01, 1}, {0x03, 1}, {0x04, 2}, {0x08, 8}, {0x09, 2}, + {0x0a, 5}, {0x0b, 2}, {0x0e, 4}, {0x10, 1}, {0x11, 2}, {0x12, 5}, + {0x13, 17}, {0x14, 1}, {0x15, 2}, {0x17, 2}, {0x19, 13}, {0x1c, 5}, + {0x1d, 8}, {0x24, 1}, {0x6a, 3}, {0x6b, 2}, {0xbc, 2}, {0xd1, 2}, + {0xd4, 12}, {0xd5, 9}, {0xd6, 2}, {0xd7, 2}, {0xda, 1}, {0xe0, 5}, + {0xe1, 2}, {0xe8, 2}, {0xee, 32}, {0xf0, 4}, {0xf8, 2}, {0xf9, 2}, + {0xfa, 2}, {0xfb, 1}, + }; + static constexpr unsigned char singletons1_lower[] = { + 0x0c, 0x27, 0x3b, 0x3e, 0x4e, 0x4f, 0x8f, 0x9e, 0x9e, 0x9f, 0x06, 0x07, + 0x09, 0x36, 0x3d, 0x3e, 0x56, 0xf3, 0xd0, 0xd1, 0x04, 0x14, 0x18, 0x36, + 0x37, 0x56, 0x57, 0x7f, 0xaa, 0xae, 0xaf, 0xbd, 0x35, 0xe0, 0x12, 0x87, + 0x89, 0x8e, 0x9e, 0x04, 0x0d, 0x0e, 0x11, 0x12, 0x29, 0x31, 0x34, 0x3a, + 0x45, 0x46, 0x49, 0x4a, 0x4e, 0x4f, 0x64, 0x65, 0x5c, 0xb6, 0xb7, 0x1b, + 0x1c, 0x07, 0x08, 0x0a, 0x0b, 0x14, 0x17, 0x36, 0x39, 0x3a, 0xa8, 0xa9, + 0xd8, 0xd9, 0x09, 0x37, 0x90, 0x91, 0xa8, 0x07, 0x0a, 0x3b, 0x3e, 0x66, + 0x69, 0x8f, 0x92, 0x6f, 0x5f, 0xee, 0xef, 0x5a, 0x62, 0x9a, 0x9b, 0x27, + 0x28, 0x55, 0x9d, 0xa0, 0xa1, 0xa3, 0xa4, 0xa7, 0xa8, 0xad, 0xba, 0xbc, + 0xc4, 0x06, 0x0b, 0x0c, 0x15, 0x1d, 0x3a, 0x3f, 0x45, 0x51, 0xa6, 0xa7, + 0xcc, 0xcd, 0xa0, 0x07, 0x19, 0x1a, 0x22, 0x25, 0x3e, 0x3f, 0xc5, 0xc6, + 0x04, 0x20, 0x23, 0x25, 0x26, 0x28, 0x33, 0x38, 0x3a, 0x48, 0x4a, 0x4c, + 0x50, 0x53, 0x55, 0x56, 0x58, 0x5a, 0x5c, 0x5e, 0x60, 0x63, 0x65, 0x66, + 0x6b, 0x73, 0x78, 0x7d, 0x7f, 0x8a, 0xa4, 0xaa, 0xaf, 0xb0, 0xc0, 0xd0, + 0xae, 0xaf, 0x79, 0xcc, 0x6e, 0x6f, 0x93, + }; + static constexpr unsigned char normal0[] = { + 0x00, 0x20, 0x5f, 0x22, 0x82, 0xdf, 0x04, 0x82, 0x44, 0x08, 0x1b, 0x04, + 0x06, 0x11, 0x81, 0xac, 0x0e, 0x80, 0xab, 0x35, 0x28, 0x0b, 0x80, 0xe0, + 0x03, 0x19, 0x08, 0x01, 0x04, 0x2f, 0x04, 0x34, 0x04, 0x07, 0x03, 0x01, + 0x07, 0x06, 0x07, 0x11, 0x0a, 0x50, 0x0f, 0x12, 0x07, 0x55, 0x07, 0x03, + 0x04, 0x1c, 0x0a, 0x09, 0x03, 0x08, 0x03, 0x07, 0x03, 0x02, 0x03, 0x03, + 0x03, 0x0c, 0x04, 0x05, 0x03, 0x0b, 0x06, 0x01, 0x0e, 0x15, 0x05, 0x3a, + 0x03, 0x11, 0x07, 0x06, 0x05, 0x10, 0x07, 0x57, 0x07, 0x02, 0x07, 0x15, + 0x0d, 0x50, 0x04, 0x43, 0x03, 0x2d, 0x03, 0x01, 0x04, 0x11, 0x06, 0x0f, + 0x0c, 0x3a, 0x04, 0x1d, 0x25, 0x5f, 0x20, 0x6d, 0x04, 0x6a, 0x25, 0x80, + 0xc8, 0x05, 0x82, 0xb0, 0x03, 0x1a, 0x06, 0x82, 0xfd, 0x03, 0x59, 0x07, + 0x15, 0x0b, 0x17, 0x09, 0x14, 0x0c, 0x14, 0x0c, 0x6a, 0x06, 0x0a, 0x06, + 0x1a, 0x06, 0x59, 0x07, 0x2b, 0x05, 0x46, 0x0a, 0x2c, 0x04, 0x0c, 0x04, + 0x01, 0x03, 0x31, 0x0b, 0x2c, 0x04, 0x1a, 0x06, 0x0b, 0x03, 0x80, 0xac, + 0x06, 0x0a, 0x06, 0x21, 0x3f, 0x4c, 0x04, 0x2d, 0x03, 0x74, 0x08, 0x3c, + 0x03, 0x0f, 0x03, 0x3c, 0x07, 0x38, 0x08, 0x2b, 0x05, 0x82, 0xff, 0x11, + 0x18, 0x08, 0x2f, 0x11, 0x2d, 0x03, 0x20, 0x10, 0x21, 0x0f, 0x80, 0x8c, + 0x04, 0x82, 0x97, 0x19, 0x0b, 0x15, 0x88, 0x94, 0x05, 0x2f, 0x05, 0x3b, + 0x07, 0x02, 0x0e, 0x18, 0x09, 0x80, 0xb3, 0x2d, 0x74, 0x0c, 0x80, 0xd6, + 0x1a, 0x0c, 0x05, 0x80, 0xff, 0x05, 0x80, 0xdf, 0x0c, 0xee, 0x0d, 0x03, + 0x84, 0x8d, 0x03, 0x37, 0x09, 0x81, 0x5c, 0x14, 0x80, 0xb8, 0x08, 0x80, + 0xcb, 0x2a, 0x38, 0x03, 0x0a, 0x06, 0x38, 0x08, 0x46, 0x08, 0x0c, 0x06, + 0x74, 0x0b, 0x1e, 0x03, 0x5a, 0x04, 0x59, 0x09, 0x80, 0x83, 0x18, 0x1c, + 0x0a, 0x16, 0x09, 0x4c, 0x04, 0x80, 0x8a, 0x06, 0xab, 0xa4, 0x0c, 0x17, + 0x04, 0x31, 0xa1, 0x04, 0x81, 0xda, 0x26, 0x07, 0x0c, 0x05, 0x05, 0x80, + 0xa5, 0x11, 0x81, 0x6d, 0x10, 0x78, 0x28, 0x2a, 0x06, 0x4c, 0x04, 0x80, + 0x8d, 0x04, 0x80, 0xbe, 0x03, 0x1b, 0x03, 0x0f, 0x0d, + }; + static constexpr unsigned char normal1[] = { + 0x5e, 0x22, 0x7b, 0x05, 0x03, 0x04, 0x2d, 0x03, 0x66, 0x03, 0x01, 0x2f, + 0x2e, 0x80, 0x82, 0x1d, 0x03, 0x31, 0x0f, 0x1c, 0x04, 0x24, 0x09, 0x1e, + 0x05, 0x2b, 0x05, 0x44, 0x04, 0x0e, 0x2a, 0x80, 0xaa, 0x06, 0x24, 0x04, + 0x24, 0x04, 0x28, 0x08, 0x34, 0x0b, 0x01, 0x80, 0x90, 0x81, 0x37, 0x09, + 0x16, 0x0a, 0x08, 0x80, 0x98, 0x39, 0x03, 0x63, 0x08, 0x09, 0x30, 0x16, + 0x05, 0x21, 0x03, 0x1b, 0x05, 0x01, 0x40, 0x38, 0x04, 0x4b, 0x05, 0x2f, + 0x04, 0x0a, 0x07, 0x09, 0x07, 0x40, 0x20, 0x27, 0x04, 0x0c, 0x09, 0x36, + 0x03, 0x3a, 0x05, 0x1a, 0x07, 0x04, 0x0c, 0x07, 0x50, 0x49, 0x37, 0x33, + 0x0d, 0x33, 0x07, 0x2e, 0x08, 0x0a, 0x81, 0x26, 0x52, 0x4e, 0x28, 0x08, + 0x2a, 0x56, 0x1c, 0x14, 0x17, 0x09, 0x4e, 0x04, 0x1e, 0x0f, 0x43, 0x0e, + 0x19, 0x07, 0x0a, 0x06, 0x48, 0x08, 0x27, 0x09, 0x75, 0x0b, 0x3f, 0x41, + 0x2a, 0x06, 0x3b, 0x05, 0x0a, 0x06, 0x51, 0x06, 0x01, 0x05, 0x10, 0x03, + 0x05, 0x80, 0x8b, 0x62, 0x1e, 0x48, 0x08, 0x0a, 0x80, 0xa6, 0x5e, 0x22, + 0x45, 0x0b, 0x0a, 0x06, 0x0d, 0x13, 0x39, 0x07, 0x0a, 0x36, 0x2c, 0x04, + 0x10, 0x80, 0xc0, 0x3c, 0x64, 0x53, 0x0c, 0x48, 0x09, 0x0a, 0x46, 0x45, + 0x1b, 0x48, 0x08, 0x53, 0x1d, 0x39, 0x81, 0x07, 0x46, 0x0a, 0x1d, 0x03, + 0x47, 0x49, 0x37, 0x03, 0x0e, 0x08, 0x0a, 0x06, 0x39, 0x07, 0x0a, 0x81, + 0x36, 0x19, 0x80, 0xb7, 0x01, 0x0f, 0x32, 0x0d, 0x83, 0x9b, 0x66, 0x75, + 0x0b, 0x80, 0xc4, 0x8a, 0xbc, 0x84, 0x2f, 0x8f, 0xd1, 0x82, 0x47, 0xa1, + 0xb9, 0x82, 0x39, 0x07, 0x2a, 0x04, 0x02, 0x60, 0x26, 0x0a, 0x46, 0x0a, + 0x28, 0x05, 0x13, 0x82, 0xb0, 0x5b, 0x65, 0x4b, 0x04, 0x39, 0x07, 0x11, + 0x40, 0x05, 0x0b, 0x02, 0x0e, 0x97, 0xf8, 0x08, 0x84, 0xd6, 0x2a, 0x09, + 0xa2, 0xf7, 0x81, 0x1f, 0x31, 0x03, 0x11, 0x04, 0x08, 0x81, 0x8c, 0x89, + 0x04, 0x6b, 0x05, 0x0d, 0x03, 0x09, 0x07, 0x10, 0x93, 0x60, 0x80, 0xf6, + 0x0a, 0x73, 0x08, 0x6e, 0x17, 0x46, 0x80, 0x9a, 0x14, 0x0c, 0x57, 0x09, + 0x19, 0x80, 0x87, 0x81, 0x47, 0x03, 0x85, 0x42, 0x0f, 0x15, 0x85, 0x50, + 0x2b, 0x80, 0xd5, 0x2d, 0x03, 0x1a, 0x04, 0x02, 0x81, 0x70, 0x3a, 0x05, + 0x01, 0x85, 0x00, 0x80, 0xd7, 0x29, 0x4c, 0x04, 0x0a, 0x04, 0x02, 0x83, + 0x11, 0x44, 0x4c, 0x3d, 0x80, 0xc2, 0x3c, 0x06, 0x01, 0x04, 0x55, 0x05, + 0x1b, 0x34, 0x02, 0x81, 0x0e, 0x2c, 0x04, 0x64, 0x0c, 0x56, 0x0a, 0x80, + 0xae, 0x38, 0x1d, 0x0d, 0x2c, 0x04, 0x09, 0x07, 0x02, 0x0e, 0x06, 0x80, + 0x9a, 0x83, 0xd8, 0x08, 0x0d, 0x03, 0x0d, 0x03, 0x74, 0x0c, 0x59, 0x07, + 0x0c, 0x14, 0x0c, 0x04, 0x38, 0x08, 0x0a, 0x06, 0x28, 0x08, 0x22, 0x4e, + 0x81, 0x54, 0x0c, 0x15, 0x03, 0x03, 0x05, 0x07, 0x09, 0x19, 0x07, 0x07, + 0x09, 0x03, 0x0d, 0x07, 0x29, 0x80, 0xcb, 0x25, 0x0a, 0x84, 0x06, + }; + auto lower = static_cast(cp); + if (cp < 0x10000) { + return is_printable(lower, singletons0, + sizeof(singletons0) / sizeof(*singletons0), + singletons0_lower, normal0, sizeof(normal0)); + } + if (cp < 0x20000) { + return is_printable(lower, singletons1, + sizeof(singletons1) / sizeof(*singletons1), + singletons1_lower, normal1, sizeof(normal1)); + } + if (0x2a6de <= cp && cp < 0x2a700) return false; + if (0x2b735 <= cp && cp < 0x2b740) return false; + if (0x2b81e <= cp && cp < 0x2b820) return false; + if (0x2cea2 <= cp && cp < 0x2ceb0) return false; + if (0x2ebe1 <= cp && cp < 0x2f800) return false; + if (0x2fa1e <= cp && cp < 0x30000) return false; + if (0x3134b <= cp && cp < 0xe0100) return false; + if (0xe01f0 <= cp && cp < 0x110000) return false; + return cp < 0x110000; +} + +} // namespace detail + +FMT_END_NAMESPACE + +#endif // FMT_FORMAT_INL_H_ diff --git a/c/vendor/fmt/include/fmt/format.h b/c/vendor/fmt/include/fmt/format.h new file mode 100644 index 0000000000..7637c8a0d0 --- /dev/null +++ b/c/vendor/fmt/include/fmt/format.h @@ -0,0 +1,4535 @@ +/* + Formatting library for C++ + + Copyright (c) 2012 - present, Victor Zverovich + + Permission is hereby granted, free of charge, to any person obtaining + a copy of this software and associated documentation files (the + "Software"), to deal in the Software without restriction, including + without limitation the rights to use, copy, modify, merge, publish, + distribute, sublicense, and/or sell copies of the Software, and to + permit persons to whom the Software is furnished to do so, subject to + the following conditions: + + The above copyright notice and this permission notice shall be + included in all copies or substantial portions of the Software. + + THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE + LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION + OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION + WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + + --- Optional exception to the license --- + + As an exception, if, as a result of your compiling your source code, portions + of this Software are embedded into a machine-executable object form of such + source code, you may redistribute such embedded portions in such object form + without including the above copyright and permission notices. + */ + +#ifndef FMT_FORMAT_H_ +#define FMT_FORMAT_H_ + +#include // std::signbit +#include // uint32_t +#include // std::memcpy +#include // std::initializer_list +#include // std::numeric_limits +#include // std::uninitialized_copy +#include // std::runtime_error +#include // std::system_error + +#ifdef __cpp_lib_bit_cast +# include // std::bit_cast +#endif + +#include "core.h" + +#if defined __cpp_inline_variables && __cpp_inline_variables >= 201606L +# define FMT_INLINE_VARIABLE inline +#else +# define FMT_INLINE_VARIABLE +#endif + +#if FMT_HAS_CPP17_ATTRIBUTE(fallthrough) +# define FMT_FALLTHROUGH [[fallthrough]] +#elif defined(__clang__) +# define FMT_FALLTHROUGH [[clang::fallthrough]] +#elif FMT_GCC_VERSION >= 700 && \ + (!defined(__EDG_VERSION__) || __EDG_VERSION__ >= 520) +# define FMT_FALLTHROUGH [[gnu::fallthrough]] +#else +# define FMT_FALLTHROUGH +#endif + +#ifndef FMT_DEPRECATED +# if FMT_HAS_CPP14_ATTRIBUTE(deprecated) || FMT_MSC_VERSION >= 1900 +# define FMT_DEPRECATED [[deprecated]] +# else +# if (defined(__GNUC__) && !defined(__LCC__)) || defined(__clang__) +# define FMT_DEPRECATED __attribute__((deprecated)) +# elif FMT_MSC_VERSION +# define FMT_DEPRECATED __declspec(deprecated) +# else +# define FMT_DEPRECATED /* deprecated */ +# endif +# endif +#endif + +#ifndef FMT_NO_UNIQUE_ADDRESS +# if FMT_CPLUSPLUS >= 202002L +# if FMT_HAS_CPP_ATTRIBUTE(no_unique_address) +# define FMT_NO_UNIQUE_ADDRESS [[no_unique_address]] +// VS2019 v16.10 and later except clang-cl (https://reviews.llvm.org/D110485) +# elif (FMT_MSC_VERSION >= 1929) && !FMT_CLANG_VERSION +# define FMT_NO_UNIQUE_ADDRESS [[msvc::no_unique_address]] +# endif +# endif +#endif +#ifndef FMT_NO_UNIQUE_ADDRESS +# define FMT_NO_UNIQUE_ADDRESS +#endif + +// Visibility when compiled as a shared library/object. +#if defined(FMT_LIB_EXPORT) || defined(FMT_SHARED) +# define FMT_SO_VISIBILITY(value) FMT_VISIBILITY(value) +#else +# define FMT_SO_VISIBILITY(value) +#endif + +#ifdef __has_builtin +# define FMT_HAS_BUILTIN(x) __has_builtin(x) +#else +# define FMT_HAS_BUILTIN(x) 0 +#endif + +#if FMT_GCC_VERSION || FMT_CLANG_VERSION +# define FMT_NOINLINE __attribute__((noinline)) +#else +# define FMT_NOINLINE +#endif + +#ifndef FMT_THROW +# if FMT_EXCEPTIONS +# if FMT_MSC_VERSION || defined(__NVCC__) +FMT_BEGIN_NAMESPACE +namespace detail { +template inline void do_throw(const Exception& x) { + // Silence unreachable code warnings in MSVC and NVCC because these + // are nearly impossible to fix in a generic code. + volatile bool b = true; + if (b) throw x; +} +} // namespace detail +FMT_END_NAMESPACE +# define FMT_THROW(x) detail::do_throw(x) +# else +# define FMT_THROW(x) throw x +# endif +# else +# define FMT_THROW(x) \ + ::fmt::detail::assert_fail(__FILE__, __LINE__, (x).what()) +# endif +#endif + +#if FMT_EXCEPTIONS +# define FMT_TRY try +# define FMT_CATCH(x) catch (x) +#else +# define FMT_TRY if (true) +# define FMT_CATCH(x) if (false) +#endif + +#ifndef FMT_MAYBE_UNUSED +# if FMT_HAS_CPP17_ATTRIBUTE(maybe_unused) +# define FMT_MAYBE_UNUSED [[maybe_unused]] +# else +# define FMT_MAYBE_UNUSED +# endif +#endif + +#ifndef FMT_USE_USER_DEFINED_LITERALS +// EDG based compilers (Intel, NVIDIA, Elbrus, etc), GCC and MSVC support UDLs. +// +// GCC before 4.9 requires a space in `operator"" _a` which is invalid in later +// compiler versions. +# if (FMT_HAS_FEATURE(cxx_user_literals) || FMT_GCC_VERSION >= 409 || \ + FMT_MSC_VERSION >= 1900) && \ + (!defined(__EDG_VERSION__) || __EDG_VERSION__ >= /* UDL feature */ 480) +# define FMT_USE_USER_DEFINED_LITERALS 1 +# else +# define FMT_USE_USER_DEFINED_LITERALS 0 +# endif +#endif + +// Defining FMT_REDUCE_INT_INSTANTIATIONS to 1, will reduce the number of +// integer formatter template instantiations to just one by only using the +// largest integer type. This results in a reduction in binary size but will +// cause a decrease in integer formatting performance. +#if !defined(FMT_REDUCE_INT_INSTANTIATIONS) +# define FMT_REDUCE_INT_INSTANTIATIONS 0 +#endif + +// __builtin_clz is broken in clang with Microsoft CodeGen: +// https://github.com/fmtlib/fmt/issues/519. +#if !FMT_MSC_VERSION +# if FMT_HAS_BUILTIN(__builtin_clz) || FMT_GCC_VERSION || FMT_ICC_VERSION +# define FMT_BUILTIN_CLZ(n) __builtin_clz(n) +# endif +# if FMT_HAS_BUILTIN(__builtin_clzll) || FMT_GCC_VERSION || FMT_ICC_VERSION +# define FMT_BUILTIN_CLZLL(n) __builtin_clzll(n) +# endif +#endif + +// __builtin_ctz is broken in Intel Compiler Classic on Windows: +// https://github.com/fmtlib/fmt/issues/2510. +#ifndef __ICL +# if FMT_HAS_BUILTIN(__builtin_ctz) || FMT_GCC_VERSION || FMT_ICC_VERSION || \ + defined(__NVCOMPILER) +# define FMT_BUILTIN_CTZ(n) __builtin_ctz(n) +# endif +# if FMT_HAS_BUILTIN(__builtin_ctzll) || FMT_GCC_VERSION || \ + FMT_ICC_VERSION || defined(__NVCOMPILER) +# define FMT_BUILTIN_CTZLL(n) __builtin_ctzll(n) +# endif +#endif + +#if FMT_MSC_VERSION +# include // _BitScanReverse[64], _BitScanForward[64], _umul128 +#endif + +// Some compilers masquerade as both MSVC and GCC-likes or otherwise support +// __builtin_clz and __builtin_clzll, so only define FMT_BUILTIN_CLZ using the +// MSVC intrinsics if the clz and clzll builtins are not available. +#if FMT_MSC_VERSION && !defined(FMT_BUILTIN_CLZLL) && \ + !defined(FMT_BUILTIN_CTZLL) +FMT_BEGIN_NAMESPACE +namespace detail { +// Avoid Clang with Microsoft CodeGen's -Wunknown-pragmas warning. +# if !defined(__clang__) +# pragma intrinsic(_BitScanForward) +# pragma intrinsic(_BitScanReverse) +# if defined(_WIN64) +# pragma intrinsic(_BitScanForward64) +# pragma intrinsic(_BitScanReverse64) +# endif +# endif + +inline auto clz(uint32_t x) -> int { + unsigned long r = 0; + _BitScanReverse(&r, x); + FMT_ASSERT(x != 0, ""); + // Static analysis complains about using uninitialized data + // "r", but the only way that can happen is if "x" is 0, + // which the callers guarantee to not happen. + FMT_MSC_WARNING(suppress : 6102) + return 31 ^ static_cast(r); +} +# define FMT_BUILTIN_CLZ(n) detail::clz(n) + +inline auto clzll(uint64_t x) -> int { + unsigned long r = 0; +# ifdef _WIN64 + _BitScanReverse64(&r, x); +# else + // Scan the high 32 bits. + if (_BitScanReverse(&r, static_cast(x >> 32))) + return 63 ^ static_cast(r + 32); + // Scan the low 32 bits. + _BitScanReverse(&r, static_cast(x)); +# endif + FMT_ASSERT(x != 0, ""); + FMT_MSC_WARNING(suppress : 6102) // Suppress a bogus static analysis warning. + return 63 ^ static_cast(r); +} +# define FMT_BUILTIN_CLZLL(n) detail::clzll(n) + +inline auto ctz(uint32_t x) -> int { + unsigned long r = 0; + _BitScanForward(&r, x); + FMT_ASSERT(x != 0, ""); + FMT_MSC_WARNING(suppress : 6102) // Suppress a bogus static analysis warning. + return static_cast(r); +} +# define FMT_BUILTIN_CTZ(n) detail::ctz(n) + +inline auto ctzll(uint64_t x) -> int { + unsigned long r = 0; + FMT_ASSERT(x != 0, ""); + FMT_MSC_WARNING(suppress : 6102) // Suppress a bogus static analysis warning. +# ifdef _WIN64 + _BitScanForward64(&r, x); +# else + // Scan the low 32 bits. + if (_BitScanForward(&r, static_cast(x))) return static_cast(r); + // Scan the high 32 bits. + _BitScanForward(&r, static_cast(x >> 32)); + r += 32; +# endif + return static_cast(r); +} +# define FMT_BUILTIN_CTZLL(n) detail::ctzll(n) +} // namespace detail +FMT_END_NAMESPACE +#endif + +FMT_BEGIN_NAMESPACE +namespace detail { + +FMT_CONSTEXPR inline void abort_fuzzing_if(bool condition) { + ignore_unused(condition); +#ifdef FMT_FUZZ + if (condition) throw std::runtime_error("fuzzing limit reached"); +#endif +} + +template struct string_literal { + static constexpr CharT value[sizeof...(C)] = {C...}; + constexpr operator basic_string_view() const { + return {value, sizeof...(C)}; + } +}; + +#if FMT_CPLUSPLUS < 201703L +template +constexpr CharT string_literal::value[sizeof...(C)]; +#endif + +// Implementation of std::bit_cast for pre-C++20. +template +FMT_CONSTEXPR20 auto bit_cast(const From& from) -> To { +#ifdef __cpp_lib_bit_cast + if (is_constant_evaluated()) return std::bit_cast(from); +#endif + auto to = To(); + // The cast suppresses a bogus -Wclass-memaccess on GCC. + std::memcpy(static_cast(&to), &from, sizeof(to)); + return to; +} + +inline auto is_big_endian() -> bool { +#ifdef _WIN32 + return false; +#elif defined(__BIG_ENDIAN__) + return true; +#elif defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) + return __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__; +#else + struct bytes { + char data[sizeof(int)]; + }; + return bit_cast(1).data[0] == 0; +#endif +} + +class uint128_fallback { + private: + uint64_t lo_, hi_; + + public: + constexpr uint128_fallback(uint64_t hi, uint64_t lo) : lo_(lo), hi_(hi) {} + constexpr uint128_fallback(uint64_t value = 0) : lo_(value), hi_(0) {} + + constexpr auto high() const noexcept -> uint64_t { return hi_; } + constexpr auto low() const noexcept -> uint64_t { return lo_; } + + template ::value)> + constexpr explicit operator T() const { + return static_cast(lo_); + } + + friend constexpr auto operator==(const uint128_fallback& lhs, + const uint128_fallback& rhs) -> bool { + return lhs.hi_ == rhs.hi_ && lhs.lo_ == rhs.lo_; + } + friend constexpr auto operator!=(const uint128_fallback& lhs, + const uint128_fallback& rhs) -> bool { + return !(lhs == rhs); + } + friend constexpr auto operator>(const uint128_fallback& lhs, + const uint128_fallback& rhs) -> bool { + return lhs.hi_ != rhs.hi_ ? lhs.hi_ > rhs.hi_ : lhs.lo_ > rhs.lo_; + } + friend constexpr auto operator|(const uint128_fallback& lhs, + const uint128_fallback& rhs) + -> uint128_fallback { + return {lhs.hi_ | rhs.hi_, lhs.lo_ | rhs.lo_}; + } + friend constexpr auto operator&(const uint128_fallback& lhs, + const uint128_fallback& rhs) + -> uint128_fallback { + return {lhs.hi_ & rhs.hi_, lhs.lo_ & rhs.lo_}; + } + friend constexpr auto operator~(const uint128_fallback& n) + -> uint128_fallback { + return {~n.hi_, ~n.lo_}; + } + friend auto operator+(const uint128_fallback& lhs, + const uint128_fallback& rhs) -> uint128_fallback { + auto result = uint128_fallback(lhs); + result += rhs; + return result; + } + friend auto operator*(const uint128_fallback& lhs, uint32_t rhs) + -> uint128_fallback { + FMT_ASSERT(lhs.hi_ == 0, ""); + uint64_t hi = (lhs.lo_ >> 32) * rhs; + uint64_t lo = (lhs.lo_ & ~uint32_t()) * rhs; + uint64_t new_lo = (hi << 32) + lo; + return {(hi >> 32) + (new_lo < lo ? 1 : 0), new_lo}; + } + friend auto operator-(const uint128_fallback& lhs, uint64_t rhs) + -> uint128_fallback { + return {lhs.hi_ - (lhs.lo_ < rhs ? 1 : 0), lhs.lo_ - rhs}; + } + FMT_CONSTEXPR auto operator>>(int shift) const -> uint128_fallback { + if (shift == 64) return {0, hi_}; + if (shift > 64) return uint128_fallback(0, hi_) >> (shift - 64); + return {hi_ >> shift, (hi_ << (64 - shift)) | (lo_ >> shift)}; + } + FMT_CONSTEXPR auto operator<<(int shift) const -> uint128_fallback { + if (shift == 64) return {lo_, 0}; + if (shift > 64) return uint128_fallback(lo_, 0) << (shift - 64); + return {hi_ << shift | (lo_ >> (64 - shift)), (lo_ << shift)}; + } + FMT_CONSTEXPR auto operator>>=(int shift) -> uint128_fallback& { + return *this = *this >> shift; + } + FMT_CONSTEXPR void operator+=(uint128_fallback n) { + uint64_t new_lo = lo_ + n.lo_; + uint64_t new_hi = hi_ + n.hi_ + (new_lo < lo_ ? 1 : 0); + FMT_ASSERT(new_hi >= hi_, ""); + lo_ = new_lo; + hi_ = new_hi; + } + FMT_CONSTEXPR void operator&=(uint128_fallback n) { + lo_ &= n.lo_; + hi_ &= n.hi_; + } + + FMT_CONSTEXPR20 auto operator+=(uint64_t n) noexcept -> uint128_fallback& { + if (is_constant_evaluated()) { + lo_ += n; + hi_ += (lo_ < n ? 1 : 0); + return *this; + } +#if FMT_HAS_BUILTIN(__builtin_addcll) && !defined(__ibmxl__) + unsigned long long carry; + lo_ = __builtin_addcll(lo_, n, 0, &carry); + hi_ += carry; +#elif FMT_HAS_BUILTIN(__builtin_ia32_addcarryx_u64) && !defined(__ibmxl__) + unsigned long long result; + auto carry = __builtin_ia32_addcarryx_u64(0, lo_, n, &result); + lo_ = result; + hi_ += carry; +#elif defined(_MSC_VER) && defined(_M_X64) + auto carry = _addcarry_u64(0, lo_, n, &lo_); + _addcarry_u64(carry, hi_, 0, &hi_); +#else + lo_ += n; + hi_ += (lo_ < n ? 1 : 0); +#endif + return *this; + } +}; + +using uint128_t = conditional_t; + +#ifdef UINTPTR_MAX +using uintptr_t = ::uintptr_t; +#else +using uintptr_t = uint128_t; +#endif + +// Returns the largest possible value for type T. Same as +// std::numeric_limits::max() but shorter and not affected by the max macro. +template constexpr auto max_value() -> T { + return (std::numeric_limits::max)(); +} +template constexpr auto num_bits() -> int { + return std::numeric_limits::digits; +} +// std::numeric_limits::digits may return 0 for 128-bit ints. +template <> constexpr auto num_bits() -> int { return 128; } +template <> constexpr auto num_bits() -> int { return 128; } + +// A heterogeneous bit_cast used for converting 96-bit long double to uint128_t +// and 128-bit pointers to uint128_fallback. +template sizeof(From))> +inline auto bit_cast(const From& from) -> To { + constexpr auto size = static_cast(sizeof(From) / sizeof(unsigned)); + struct data_t { + unsigned value[static_cast(size)]; + } data = bit_cast(from); + auto result = To(); + if (const_check(is_big_endian())) { + for (int i = 0; i < size; ++i) + result = (result << num_bits()) | data.value[i]; + } else { + for (int i = size - 1; i >= 0; --i) + result = (result << num_bits()) | data.value[i]; + } + return result; +} + +template +FMT_CONSTEXPR20 inline auto countl_zero_fallback(UInt n) -> int { + int lz = 0; + constexpr UInt msb_mask = static_cast(1) << (num_bits() - 1); + for (; (n & msb_mask) == 0; n <<= 1) lz++; + return lz; +} + +FMT_CONSTEXPR20 inline auto countl_zero(uint32_t n) -> int { +#ifdef FMT_BUILTIN_CLZ + if (!is_constant_evaluated()) return FMT_BUILTIN_CLZ(n); +#endif + return countl_zero_fallback(n); +} + +FMT_CONSTEXPR20 inline auto countl_zero(uint64_t n) -> int { +#ifdef FMT_BUILTIN_CLZLL + if (!is_constant_evaluated()) return FMT_BUILTIN_CLZLL(n); +#endif + return countl_zero_fallback(n); +} + +FMT_INLINE void assume(bool condition) { + (void)condition; +#if FMT_HAS_BUILTIN(__builtin_assume) && !FMT_ICC_VERSION + __builtin_assume(condition); +#elif FMT_GCC_VERSION + if (!condition) __builtin_unreachable(); +#endif +} + +// An approximation of iterator_t for pre-C++20 systems. +template +using iterator_t = decltype(std::begin(std::declval())); +template using sentinel_t = decltype(std::end(std::declval())); + +// A workaround for std::string not having mutable data() until C++17. +template +inline auto get_data(std::basic_string& s) -> Char* { + return &s[0]; +} +template +inline auto get_data(Container& c) -> typename Container::value_type* { + return c.data(); +} + +// Attempts to reserve space for n extra characters in the output range. +// Returns a pointer to the reserved range or a reference to it. +template ::value)> +#if FMT_CLANG_VERSION >= 307 && !FMT_ICC_VERSION +__attribute__((no_sanitize("undefined"))) +#endif +inline auto +reserve(std::back_insert_iterator it, size_t n) -> + typename Container::value_type* { + Container& c = get_container(it); + size_t size = c.size(); + c.resize(size + n); + return get_data(c) + size; +} + +template +inline auto reserve(buffer_appender it, size_t n) -> buffer_appender { + buffer& buf = get_container(it); + buf.try_reserve(buf.size() + n); + return it; +} + +template +constexpr auto reserve(Iterator& it, size_t) -> Iterator& { + return it; +} + +template +using reserve_iterator = + remove_reference_t(), 0))>; + +template +constexpr auto to_pointer(OutputIt, size_t) -> T* { + return nullptr; +} +template auto to_pointer(buffer_appender it, size_t n) -> T* { + buffer& buf = get_container(it); + auto size = buf.size(); + if (buf.capacity() < size + n) return nullptr; + buf.try_resize(size + n); + return buf.data() + size; +} + +template ::value)> +inline auto base_iterator(std::back_insert_iterator it, + typename Container::value_type*) + -> std::back_insert_iterator { + return it; +} + +template +constexpr auto base_iterator(Iterator, Iterator it) -> Iterator { + return it; +} + +// is spectacularly slow to compile in C++20 so use a simple fill_n +// instead (#1998). +template +FMT_CONSTEXPR auto fill_n(OutputIt out, Size count, const T& value) + -> OutputIt { + for (Size i = 0; i < count; ++i) *out++ = value; + return out; +} +template +FMT_CONSTEXPR20 auto fill_n(T* out, Size count, char value) -> T* { + if (is_constant_evaluated()) { + return fill_n(out, count, value); + } + std::memset(out, value, to_unsigned(count)); + return out + count; +} + +#ifdef __cpp_char8_t +using char8_type = char8_t; +#else +enum char8_type : unsigned char {}; +#endif + +template +FMT_CONSTEXPR FMT_NOINLINE auto copy_str_noinline(InputIt begin, InputIt end, + OutputIt out) -> OutputIt { + return copy_str(begin, end, out); +} + +// A public domain branchless UTF-8 decoder by Christopher Wellons: +// https://github.com/skeeto/branchless-utf8 +/* Decode the next character, c, from s, reporting errors in e. + * + * Since this is a branchless decoder, four bytes will be read from the + * buffer regardless of the actual length of the next character. This + * means the buffer _must_ have at least three bytes of zero padding + * following the end of the data stream. + * + * Errors are reported in e, which will be non-zero if the parsed + * character was somehow invalid: invalid byte sequence, non-canonical + * encoding, or a surrogate half. + * + * The function returns a pointer to the next character. When an error + * occurs, this pointer will be a guess that depends on the particular + * error, but it will always advance at least one byte. + */ +FMT_CONSTEXPR inline auto utf8_decode(const char* s, uint32_t* c, int* e) + -> const char* { + constexpr const int masks[] = {0x00, 0x7f, 0x1f, 0x0f, 0x07}; + constexpr const uint32_t mins[] = {4194304, 0, 128, 2048, 65536}; + constexpr const int shiftc[] = {0, 18, 12, 6, 0}; + constexpr const int shifte[] = {0, 6, 4, 2, 0}; + + int len = "\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\0\0\0\0\0\0\0\0\2\2\2\2\3\3\4" + [static_cast(*s) >> 3]; + // Compute the pointer to the next character early so that the next + // iteration can start working on the next character. Neither Clang + // nor GCC figure out this reordering on their own. + const char* next = s + len + !len; + + using uchar = unsigned char; + + // Assume a four-byte character and load four bytes. Unused bits are + // shifted out. + *c = uint32_t(uchar(s[0]) & masks[len]) << 18; + *c |= uint32_t(uchar(s[1]) & 0x3f) << 12; + *c |= uint32_t(uchar(s[2]) & 0x3f) << 6; + *c |= uint32_t(uchar(s[3]) & 0x3f) << 0; + *c >>= shiftc[len]; + + // Accumulate the various error conditions. + *e = (*c < mins[len]) << 6; // non-canonical encoding + *e |= ((*c >> 11) == 0x1b) << 7; // surrogate half? + *e |= (*c > 0x10FFFF) << 8; // out of range? + *e |= (uchar(s[1]) & 0xc0) >> 2; + *e |= (uchar(s[2]) & 0xc0) >> 4; + *e |= uchar(s[3]) >> 6; + *e ^= 0x2a; // top two bits of each tail byte correct? + *e >>= shifte[len]; + + return next; +} + +constexpr FMT_INLINE_VARIABLE uint32_t invalid_code_point = ~uint32_t(); + +// Invokes f(cp, sv) for every code point cp in s with sv being the string view +// corresponding to the code point. cp is invalid_code_point on error. +template +FMT_CONSTEXPR void for_each_codepoint(string_view s, F f) { + auto decode = [f](const char* buf_ptr, const char* ptr) { + auto cp = uint32_t(); + auto error = 0; + auto end = utf8_decode(buf_ptr, &cp, &error); + bool result = f(error ? invalid_code_point : cp, + string_view(ptr, error ? 1 : to_unsigned(end - buf_ptr))); + return result ? (error ? buf_ptr + 1 : end) : nullptr; + }; + auto p = s.data(); + const size_t block_size = 4; // utf8_decode always reads blocks of 4 chars. + if (s.size() >= block_size) { + for (auto end = p + s.size() - block_size + 1; p < end;) { + p = decode(p, p); + if (!p) return; + } + } + if (auto num_chars_left = s.data() + s.size() - p) { + char buf[2 * block_size - 1] = {}; + copy_str(p, p + num_chars_left, buf); + const char* buf_ptr = buf; + do { + auto end = decode(buf_ptr, p); + if (!end) return; + p += end - buf_ptr; + buf_ptr = end; + } while (buf_ptr - buf < num_chars_left); + } +} + +template +inline auto compute_width(basic_string_view s) -> size_t { + return s.size(); +} + +// Computes approximate display width of a UTF-8 string. +FMT_CONSTEXPR inline auto compute_width(string_view s) -> size_t { + size_t num_code_points = 0; + // It is not a lambda for compatibility with C++14. + struct count_code_points { + size_t* count; + FMT_CONSTEXPR auto operator()(uint32_t cp, string_view) const -> bool { + *count += detail::to_unsigned( + 1 + + (cp >= 0x1100 && + (cp <= 0x115f || // Hangul Jamo init. consonants + cp == 0x2329 || // LEFT-POINTING ANGLE BRACKET + cp == 0x232a || // RIGHT-POINTING ANGLE BRACKET + // CJK ... Yi except IDEOGRAPHIC HALF FILL SPACE: + (cp >= 0x2e80 && cp <= 0xa4cf && cp != 0x303f) || + (cp >= 0xac00 && cp <= 0xd7a3) || // Hangul Syllables + (cp >= 0xf900 && cp <= 0xfaff) || // CJK Compatibility Ideographs + (cp >= 0xfe10 && cp <= 0xfe19) || // Vertical Forms + (cp >= 0xfe30 && cp <= 0xfe6f) || // CJK Compatibility Forms + (cp >= 0xff00 && cp <= 0xff60) || // Fullwidth Forms + (cp >= 0xffe0 && cp <= 0xffe6) || // Fullwidth Forms + (cp >= 0x20000 && cp <= 0x2fffd) || // CJK + (cp >= 0x30000 && cp <= 0x3fffd) || + // Miscellaneous Symbols and Pictographs + Emoticons: + (cp >= 0x1f300 && cp <= 0x1f64f) || + // Supplemental Symbols and Pictographs: + (cp >= 0x1f900 && cp <= 0x1f9ff)))); + return true; + } + }; + // We could avoid branches by using utf8_decode directly. + for_each_codepoint(s, count_code_points{&num_code_points}); + return num_code_points; +} + +inline auto compute_width(basic_string_view s) -> size_t { + return compute_width( + string_view(reinterpret_cast(s.data()), s.size())); +} + +template +inline auto code_point_index(basic_string_view s, size_t n) -> size_t { + size_t size = s.size(); + return n < size ? n : size; +} + +// Calculates the index of the nth code point in a UTF-8 string. +inline auto code_point_index(string_view s, size_t n) -> size_t { + size_t result = s.size(); + const char* begin = s.begin(); + for_each_codepoint(s, [begin, &n, &result](uint32_t, string_view sv) { + if (n != 0) { + --n; + return true; + } + result = to_unsigned(sv.begin() - begin); + return false; + }); + return result; +} + +inline auto code_point_index(basic_string_view s, size_t n) + -> size_t { + return code_point_index( + string_view(reinterpret_cast(s.data()), s.size()), n); +} + +template struct is_integral : std::is_integral {}; +template <> struct is_integral : std::true_type {}; +template <> struct is_integral : std::true_type {}; + +template +using is_signed = + std::integral_constant::is_signed || + std::is_same::value>; + +template +using is_integer = + bool_constant::value && !std::is_same::value && + !std::is_same::value && + !std::is_same::value>; + +#ifndef FMT_USE_FLOAT +# define FMT_USE_FLOAT 1 +#endif +#ifndef FMT_USE_DOUBLE +# define FMT_USE_DOUBLE 1 +#endif +#ifndef FMT_USE_LONG_DOUBLE +# define FMT_USE_LONG_DOUBLE 1 +#endif + +#ifndef FMT_USE_FLOAT128 +# ifdef __clang__ +// Clang emulates GCC, so it has to appear early. +# if FMT_HAS_INCLUDE() +# define FMT_USE_FLOAT128 1 +# endif +# elif defined(__GNUC__) +// GNU C++: +# if defined(_GLIBCXX_USE_FLOAT128) && !defined(__STRICT_ANSI__) +# define FMT_USE_FLOAT128 1 +# endif +# endif +# ifndef FMT_USE_FLOAT128 +# define FMT_USE_FLOAT128 0 +# endif +#endif + +#if FMT_USE_FLOAT128 +using float128 = __float128; +#else +using float128 = void; +#endif +template using is_float128 = std::is_same; + +template +using is_floating_point = + bool_constant::value || is_float128::value>; + +template ::value> +struct is_fast_float : bool_constant::is_iec559 && + sizeof(T) <= sizeof(double)> {}; +template struct is_fast_float : std::false_type {}; + +template +using is_double_double = bool_constant::digits == 106>; + +#ifndef FMT_USE_FULL_CACHE_DRAGONBOX +# define FMT_USE_FULL_CACHE_DRAGONBOX 0 +#endif + +template +template +void buffer::append(const U* begin, const U* end) { + while (begin != end) { + auto count = to_unsigned(end - begin); + try_reserve(size_ + count); + auto free_cap = capacity_ - size_; + if (free_cap < count) count = free_cap; + std::uninitialized_copy_n(begin, count, ptr_ + size_); + size_ += count; + begin += count; + } +} + +template +struct is_locale : std::false_type {}; +template +struct is_locale> : std::true_type {}; +} // namespace detail + +FMT_BEGIN_EXPORT + +// The number of characters to store in the basic_memory_buffer object itself +// to avoid dynamic memory allocation. +enum { inline_buffer_size = 500 }; + +/** + \rst + A dynamically growing memory buffer for trivially copyable/constructible types + with the first ``SIZE`` elements stored in the object itself. + + You can use the ``memory_buffer`` type alias for ``char`` instead. + + **Example**:: + + auto out = fmt::memory_buffer(); + fmt::format_to(std::back_inserter(out), "The answer is {}.", 42); + + This will append the following output to the ``out`` object: + + .. code-block:: none + + The answer is 42. + + The output can be converted to an ``std::string`` with ``to_string(out)``. + \endrst + */ +template > +class basic_memory_buffer final : public detail::buffer { + private: + T store_[SIZE]; + + // Don't inherit from Allocator to avoid generating type_info for it. + FMT_NO_UNIQUE_ADDRESS Allocator alloc_; + + // Deallocate memory allocated by the buffer. + FMT_CONSTEXPR20 void deallocate() { + T* data = this->data(); + if (data != store_) alloc_.deallocate(data, this->capacity()); + } + + protected: + FMT_CONSTEXPR20 void grow(size_t size) override { + detail::abort_fuzzing_if(size > 5000); + const size_t max_size = std::allocator_traits::max_size(alloc_); + size_t old_capacity = this->capacity(); + size_t new_capacity = old_capacity + old_capacity / 2; + if (size > new_capacity) + new_capacity = size; + else if (new_capacity > max_size) + new_capacity = size > max_size ? size : max_size; + T* old_data = this->data(); + T* new_data = + std::allocator_traits::allocate(alloc_, new_capacity); + // Suppress a bogus -Wstringop-overflow in gcc 13.1 (#3481). + detail::assume(this->size() <= new_capacity); + // The following code doesn't throw, so the raw pointer above doesn't leak. + std::uninitialized_copy_n(old_data, this->size(), new_data); + this->set(new_data, new_capacity); + // deallocate must not throw according to the standard, but even if it does, + // the buffer already uses the new storage and will deallocate it in + // destructor. + if (old_data != store_) alloc_.deallocate(old_data, old_capacity); + } + + public: + using value_type = T; + using const_reference = const T&; + + FMT_CONSTEXPR20 explicit basic_memory_buffer( + const Allocator& alloc = Allocator()) + : alloc_(alloc) { + this->set(store_, SIZE); + if (detail::is_constant_evaluated()) detail::fill_n(store_, SIZE, T()); + } + FMT_CONSTEXPR20 ~basic_memory_buffer() { deallocate(); } + + private: + // Move data from other to this buffer. + FMT_CONSTEXPR20 void move(basic_memory_buffer& other) { + alloc_ = std::move(other.alloc_); + T* data = other.data(); + size_t size = other.size(), capacity = other.capacity(); + if (data == other.store_) { + this->set(store_, capacity); + detail::copy_str(other.store_, other.store_ + size, store_); + } else { + this->set(data, capacity); + // Set pointer to the inline array so that delete is not called + // when deallocating. + other.set(other.store_, 0); + other.clear(); + } + this->resize(size); + } + + public: + /** + \rst + Constructs a :class:`fmt::basic_memory_buffer` object moving the content + of the other object to it. + \endrst + */ + FMT_CONSTEXPR20 basic_memory_buffer(basic_memory_buffer&& other) noexcept { + move(other); + } + + /** + \rst + Moves the content of the other ``basic_memory_buffer`` object to this one. + \endrst + */ + auto operator=(basic_memory_buffer&& other) noexcept -> basic_memory_buffer& { + FMT_ASSERT(this != &other, ""); + deallocate(); + move(other); + return *this; + } + + // Returns a copy of the allocator associated with this buffer. + auto get_allocator() const -> Allocator { return alloc_; } + + /** + Resizes the buffer to contain *count* elements. If T is a POD type new + elements may not be initialized. + */ + FMT_CONSTEXPR20 void resize(size_t count) { this->try_resize(count); } + + /** Increases the buffer capacity to *new_capacity*. */ + void reserve(size_t new_capacity) { this->try_reserve(new_capacity); } + + using detail::buffer::append; + template + void append(const ContiguousRange& range) { + append(range.data(), range.data() + range.size()); + } +}; + +using memory_buffer = basic_memory_buffer; + +template +struct is_contiguous> : std::true_type { +}; + +FMT_END_EXPORT +namespace detail { +FMT_API auto write_console(int fd, string_view text) -> bool; +FMT_API auto write_console(std::FILE* f, string_view text) -> bool; +FMT_API void print(std::FILE*, string_view); +} // namespace detail + +FMT_BEGIN_EXPORT + +// Suppress a misleading warning in older versions of clang. +#if FMT_CLANG_VERSION +# pragma clang diagnostic ignored "-Wweak-vtables" +#endif + +/** An error reported from a formatting function. */ +class FMT_SO_VISIBILITY("default") format_error : public std::runtime_error { + public: + using std::runtime_error::runtime_error; +}; + +namespace detail_exported { +#if FMT_USE_NONTYPE_TEMPLATE_ARGS +template struct fixed_string { + constexpr fixed_string(const Char (&str)[N]) { + detail::copy_str(static_cast(str), + str + N, data); + } + Char data[N] = {}; +}; +#endif + +// Converts a compile-time string to basic_string_view. +template +constexpr auto compile_string_to_view(const Char (&s)[N]) + -> basic_string_view { + // Remove trailing NUL character if needed. Won't be present if this is used + // with a raw character array (i.e. not defined as a string). + return {s, N - (std::char_traits::to_int_type(s[N - 1]) == 0 ? 1 : 0)}; +} +template +constexpr auto compile_string_to_view(detail::std_string_view s) + -> basic_string_view { + return {s.data(), s.size()}; +} +} // namespace detail_exported + +class loc_value { + private: + basic_format_arg value_; + + public: + template ::value)> + loc_value(T value) : value_(detail::make_arg(value)) {} + + template ::value)> + loc_value(T) {} + + template auto visit(Visitor&& vis) -> decltype(vis(0)) { + return visit_format_arg(vis, value_); + } +}; + +// A locale facet that formats values in UTF-8. +// It is parameterized on the locale to avoid the heavy include. +template class format_facet : public Locale::facet { + private: + std::string separator_; + std::string grouping_; + std::string decimal_point_; + + protected: + virtual auto do_put(appender out, loc_value val, + const format_specs<>& specs) const -> bool; + + public: + static FMT_API typename Locale::id id; + + explicit format_facet(Locale& loc); + explicit format_facet(string_view sep = "", + std::initializer_list g = {3}, + std::string decimal_point = ".") + : separator_(sep.data(), sep.size()), + grouping_(g.begin(), g.end()), + decimal_point_(decimal_point) {} + + auto put(appender out, loc_value val, const format_specs<>& specs) const + -> bool { + return do_put(out, val, specs); + } +}; + +namespace detail { + +// Returns true if value is negative, false otherwise. +// Same as `value < 0` but doesn't produce warnings if T is an unsigned type. +template ::value)> +constexpr auto is_negative(T value) -> bool { + return value < 0; +} +template ::value)> +constexpr auto is_negative(T) -> bool { + return false; +} + +template +FMT_CONSTEXPR auto is_supported_floating_point(T) -> bool { + if (std::is_same()) return FMT_USE_FLOAT; + if (std::is_same()) return FMT_USE_DOUBLE; + if (std::is_same()) return FMT_USE_LONG_DOUBLE; + return true; +} + +// Smallest of uint32_t, uint64_t, uint128_t that is large enough to +// represent all values of an integral type T. +template +using uint32_or_64_or_128_t = + conditional_t() <= 32 && !FMT_REDUCE_INT_INSTANTIATIONS, + uint32_t, + conditional_t() <= 64, uint64_t, uint128_t>>; +template +using uint64_or_128_t = conditional_t() <= 64, uint64_t, uint128_t>; + +#define FMT_POWERS_OF_10(factor) \ + factor * 10, (factor) * 100, (factor) * 1000, (factor) * 10000, \ + (factor) * 100000, (factor) * 1000000, (factor) * 10000000, \ + (factor) * 100000000, (factor) * 1000000000 + +// Converts value in the range [0, 100) to a string. +constexpr auto digits2(size_t value) -> const char* { + // GCC generates slightly better code when value is pointer-size. + return &"0001020304050607080910111213141516171819" + "2021222324252627282930313233343536373839" + "4041424344454647484950515253545556575859" + "6061626364656667686970717273747576777879" + "8081828384858687888990919293949596979899"[value * 2]; +} + +// Sign is a template parameter to workaround a bug in gcc 4.8. +template constexpr auto sign(Sign s) -> Char { +#if !FMT_GCC_VERSION || FMT_GCC_VERSION >= 604 + static_assert(std::is_same::value, ""); +#endif + return static_cast("\0-+ "[s]); +} + +template FMT_CONSTEXPR auto count_digits_fallback(T n) -> int { + int count = 1; + for (;;) { + // Integer division is slow so do it for a group of four digits instead + // of for every digit. The idea comes from the talk by Alexandrescu + // "Three Optimization Tips for C++". See speed-test for a comparison. + if (n < 10) return count; + if (n < 100) return count + 1; + if (n < 1000) return count + 2; + if (n < 10000) return count + 3; + n /= 10000u; + count += 4; + } +} +#if FMT_USE_INT128 +FMT_CONSTEXPR inline auto count_digits(uint128_opt n) -> int { + return count_digits_fallback(n); +} +#endif + +#ifdef FMT_BUILTIN_CLZLL +// It is a separate function rather than a part of count_digits to workaround +// the lack of static constexpr in constexpr functions. +inline auto do_count_digits(uint64_t n) -> int { + // This has comparable performance to the version by Kendall Willets + // (https://github.com/fmtlib/format-benchmark/blob/master/digits10) + // but uses smaller tables. + // Maps bsr(n) to ceil(log10(pow(2, bsr(n) + 1) - 1)). + static constexpr uint8_t bsr2log10[] = { + 1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, + 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 9, 9, 9, 10, 10, 10, + 10, 11, 11, 11, 12, 12, 12, 13, 13, 13, 13, 14, 14, 14, 15, 15, + 15, 16, 16, 16, 16, 17, 17, 17, 18, 18, 18, 19, 19, 19, 19, 20}; + auto t = bsr2log10[FMT_BUILTIN_CLZLL(n | 1) ^ 63]; + static constexpr const uint64_t zero_or_powers_of_10[] = { + 0, 0, FMT_POWERS_OF_10(1U), FMT_POWERS_OF_10(1000000000ULL), + 10000000000000000000ULL}; + return t - (n < zero_or_powers_of_10[t]); +} +#endif + +// Returns the number of decimal digits in n. Leading zeros are not counted +// except for n == 0 in which case count_digits returns 1. +FMT_CONSTEXPR20 inline auto count_digits(uint64_t n) -> int { +#ifdef FMT_BUILTIN_CLZLL + if (!is_constant_evaluated()) { + return do_count_digits(n); + } +#endif + return count_digits_fallback(n); +} + +// Counts the number of digits in n. BITS = log2(radix). +template +FMT_CONSTEXPR auto count_digits(UInt n) -> int { +#ifdef FMT_BUILTIN_CLZ + if (!is_constant_evaluated() && num_bits() == 32) + return (FMT_BUILTIN_CLZ(static_cast(n) | 1) ^ 31) / BITS + 1; +#endif + // Lambda avoids unreachable code warnings from NVHPC. + return [](UInt m) { + int num_digits = 0; + do { + ++num_digits; + } while ((m >>= BITS) != 0); + return num_digits; + }(n); +} + +#ifdef FMT_BUILTIN_CLZ +// It is a separate function rather than a part of count_digits to workaround +// the lack of static constexpr in constexpr functions. +FMT_INLINE auto do_count_digits(uint32_t n) -> int { +// An optimization by Kendall Willets from https://bit.ly/3uOIQrB. +// This increments the upper 32 bits (log10(T) - 1) when >= T is added. +# define FMT_INC(T) (((sizeof(#T) - 1ull) << 32) - T) + static constexpr uint64_t table[] = { + FMT_INC(0), FMT_INC(0), FMT_INC(0), // 8 + FMT_INC(10), FMT_INC(10), FMT_INC(10), // 64 + FMT_INC(100), FMT_INC(100), FMT_INC(100), // 512 + FMT_INC(1000), FMT_INC(1000), FMT_INC(1000), // 4096 + FMT_INC(10000), FMT_INC(10000), FMT_INC(10000), // 32k + FMT_INC(100000), FMT_INC(100000), FMT_INC(100000), // 256k + FMT_INC(1000000), FMT_INC(1000000), FMT_INC(1000000), // 2048k + FMT_INC(10000000), FMT_INC(10000000), FMT_INC(10000000), // 16M + FMT_INC(100000000), FMT_INC(100000000), FMT_INC(100000000), // 128M + FMT_INC(1000000000), FMT_INC(1000000000), FMT_INC(1000000000), // 1024M + FMT_INC(1000000000), FMT_INC(1000000000) // 4B + }; + auto inc = table[FMT_BUILTIN_CLZ(n | 1) ^ 31]; + return static_cast((n + inc) >> 32); +} +#endif + +// Optional version of count_digits for better performance on 32-bit platforms. +FMT_CONSTEXPR20 inline auto count_digits(uint32_t n) -> int { +#ifdef FMT_BUILTIN_CLZ + if (!is_constant_evaluated()) { + return do_count_digits(n); + } +#endif + return count_digits_fallback(n); +} + +template constexpr auto digits10() noexcept -> int { + return std::numeric_limits::digits10; +} +template <> constexpr auto digits10() noexcept -> int { return 38; } +template <> constexpr auto digits10() noexcept -> int { return 38; } + +template struct thousands_sep_result { + std::string grouping; + Char thousands_sep; +}; + +template +FMT_API auto thousands_sep_impl(locale_ref loc) -> thousands_sep_result; +template +inline auto thousands_sep(locale_ref loc) -> thousands_sep_result { + auto result = thousands_sep_impl(loc); + return {result.grouping, Char(result.thousands_sep)}; +} +template <> +inline auto thousands_sep(locale_ref loc) -> thousands_sep_result { + return thousands_sep_impl(loc); +} + +template +FMT_API auto decimal_point_impl(locale_ref loc) -> Char; +template inline auto decimal_point(locale_ref loc) -> Char { + return Char(decimal_point_impl(loc)); +} +template <> inline auto decimal_point(locale_ref loc) -> wchar_t { + return decimal_point_impl(loc); +} + +// Compares two characters for equality. +template auto equal2(const Char* lhs, const char* rhs) -> bool { + return lhs[0] == Char(rhs[0]) && lhs[1] == Char(rhs[1]); +} +inline auto equal2(const char* lhs, const char* rhs) -> bool { + return memcmp(lhs, rhs, 2) == 0; +} + +// Copies two characters from src to dst. +template +FMT_CONSTEXPR20 FMT_INLINE void copy2(Char* dst, const char* src) { + if (!is_constant_evaluated() && sizeof(Char) == sizeof(char)) { + memcpy(dst, src, 2); + return; + } + *dst++ = static_cast(*src++); + *dst = static_cast(*src); +} + +template struct format_decimal_result { + Iterator begin; + Iterator end; +}; + +// Formats a decimal unsigned integer value writing into out pointing to a +// buffer of specified size. The caller must ensure that the buffer is large +// enough. +template +FMT_CONSTEXPR20 auto format_decimal(Char* out, UInt value, int size) + -> format_decimal_result { + FMT_ASSERT(size >= count_digits(value), "invalid digit count"); + out += size; + Char* end = out; + while (value >= 100) { + // Integer division is slow so do it for a group of two digits instead + // of for every digit. The idea comes from the talk by Alexandrescu + // "Three Optimization Tips for C++". See speed-test for a comparison. + out -= 2; + copy2(out, digits2(static_cast(value % 100))); + value /= 100; + } + if (value < 10) { + *--out = static_cast('0' + value); + return {out, end}; + } + out -= 2; + copy2(out, digits2(static_cast(value))); + return {out, end}; +} + +template >::value)> +FMT_CONSTEXPR inline auto format_decimal(Iterator out, UInt value, int size) + -> format_decimal_result { + // Buffer is large enough to hold all digits (digits10 + 1). + Char buffer[digits10() + 1] = {}; + auto end = format_decimal(buffer, value, size).end; + return {out, detail::copy_str_noinline(buffer, end, out)}; +} + +template +FMT_CONSTEXPR auto format_uint(Char* buffer, UInt value, int num_digits, + bool upper = false) -> Char* { + buffer += num_digits; + Char* end = buffer; + do { + const char* digits = upper ? "0123456789ABCDEF" : "0123456789abcdef"; + unsigned digit = static_cast(value & ((1 << BASE_BITS) - 1)); + *--buffer = static_cast(BASE_BITS < 4 ? static_cast('0' + digit) + : digits[digit]); + } while ((value >>= BASE_BITS) != 0); + return end; +} + +template +FMT_CONSTEXPR inline auto format_uint(It out, UInt value, int num_digits, + bool upper = false) -> It { + if (auto ptr = to_pointer(out, to_unsigned(num_digits))) { + format_uint(ptr, value, num_digits, upper); + return out; + } + // Buffer should be large enough to hold all digits (digits / BASE_BITS + 1). + char buffer[num_bits() / BASE_BITS + 1] = {}; + format_uint(buffer, value, num_digits, upper); + return detail::copy_str_noinline(buffer, buffer + num_digits, out); +} + +// A converter from UTF-8 to UTF-16. +class utf8_to_utf16 { + private: + basic_memory_buffer buffer_; + + public: + FMT_API explicit utf8_to_utf16(string_view s); + operator basic_string_view() const { return {&buffer_[0], size()}; } + auto size() const -> size_t { return buffer_.size() - 1; } + auto c_str() const -> const wchar_t* { return &buffer_[0]; } + auto str() const -> std::wstring { return {&buffer_[0], size()}; } +}; + +enum class to_utf8_error_policy { abort, replace }; + +// A converter from UTF-16/UTF-32 (host endian) to UTF-8. +template class to_utf8 { + private: + Buffer buffer_; + + public: + to_utf8() {} + explicit to_utf8(basic_string_view s, + to_utf8_error_policy policy = to_utf8_error_policy::abort) { + static_assert(sizeof(WChar) == 2 || sizeof(WChar) == 4, + "Expect utf16 or utf32"); + if (!convert(s, policy)) + FMT_THROW(std::runtime_error(sizeof(WChar) == 2 ? "invalid utf16" + : "invalid utf32")); + } + operator string_view() const { return string_view(&buffer_[0], size()); } + auto size() const -> size_t { return buffer_.size() - 1; } + auto c_str() const -> const char* { return &buffer_[0]; } + auto str() const -> std::string { return std::string(&buffer_[0], size()); } + + // Performs conversion returning a bool instead of throwing exception on + // conversion error. This method may still throw in case of memory allocation + // error. + auto convert(basic_string_view s, + to_utf8_error_policy policy = to_utf8_error_policy::abort) + -> bool { + if (!convert(buffer_, s, policy)) return false; + buffer_.push_back(0); + return true; + } + static auto convert(Buffer& buf, basic_string_view s, + to_utf8_error_policy policy = to_utf8_error_policy::abort) + -> bool { + for (auto p = s.begin(); p != s.end(); ++p) { + uint32_t c = static_cast(*p); + if (sizeof(WChar) == 2 && c >= 0xd800 && c <= 0xdfff) { + // Handle a surrogate pair. + ++p; + if (p == s.end() || (c & 0xfc00) != 0xd800 || (*p & 0xfc00) != 0xdc00) { + if (policy == to_utf8_error_policy::abort) return false; + buf.append(string_view("\xEF\xBF\xBD")); + --p; + } else { + c = (c << 10) + static_cast(*p) - 0x35fdc00; + } + } else if (c < 0x80) { + buf.push_back(static_cast(c)); + } else if (c < 0x800) { + buf.push_back(static_cast(0xc0 | (c >> 6))); + buf.push_back(static_cast(0x80 | (c & 0x3f))); + } else if ((c >= 0x800 && c <= 0xd7ff) || (c >= 0xe000 && c <= 0xffff)) { + buf.push_back(static_cast(0xe0 | (c >> 12))); + buf.push_back(static_cast(0x80 | ((c & 0xfff) >> 6))); + buf.push_back(static_cast(0x80 | (c & 0x3f))); + } else if (c >= 0x10000 && c <= 0x10ffff) { + buf.push_back(static_cast(0xf0 | (c >> 18))); + buf.push_back(static_cast(0x80 | ((c & 0x3ffff) >> 12))); + buf.push_back(static_cast(0x80 | ((c & 0xfff) >> 6))); + buf.push_back(static_cast(0x80 | (c & 0x3f))); + } else { + return false; + } + } + return true; + } +}; + +// Computes 128-bit result of multiplication of two 64-bit unsigned integers. +inline auto umul128(uint64_t x, uint64_t y) noexcept -> uint128_fallback { +#if FMT_USE_INT128 + auto p = static_cast(x) * static_cast(y); + return {static_cast(p >> 64), static_cast(p)}; +#elif defined(_MSC_VER) && defined(_M_X64) + auto hi = uint64_t(); + auto lo = _umul128(x, y, &hi); + return {hi, lo}; +#else + const uint64_t mask = static_cast(max_value()); + + uint64_t a = x >> 32; + uint64_t b = x & mask; + uint64_t c = y >> 32; + uint64_t d = y & mask; + + uint64_t ac = a * c; + uint64_t bc = b * c; + uint64_t ad = a * d; + uint64_t bd = b * d; + + uint64_t intermediate = (bd >> 32) + (ad & mask) + (bc & mask); + + return {ac + (intermediate >> 32) + (ad >> 32) + (bc >> 32), + (intermediate << 32) + (bd & mask)}; +#endif +} + +namespace dragonbox { +// Computes floor(log10(pow(2, e))) for e in [-2620, 2620] using the method from +// https://fmt.dev/papers/Dragonbox.pdf#page=28, section 6.1. +inline auto floor_log10_pow2(int e) noexcept -> int { + FMT_ASSERT(e <= 2620 && e >= -2620, "too large exponent"); + static_assert((-1 >> 1) == -1, "right shift is not arithmetic"); + return (e * 315653) >> 20; +} + +inline auto floor_log2_pow10(int e) noexcept -> int { + FMT_ASSERT(e <= 1233 && e >= -1233, "too large exponent"); + return (e * 1741647) >> 19; +} + +// Computes upper 64 bits of multiplication of two 64-bit unsigned integers. +inline auto umul128_upper64(uint64_t x, uint64_t y) noexcept -> uint64_t { +#if FMT_USE_INT128 + auto p = static_cast(x) * static_cast(y); + return static_cast(p >> 64); +#elif defined(_MSC_VER) && defined(_M_X64) + return __umulh(x, y); +#else + return umul128(x, y).high(); +#endif +} + +// Computes upper 128 bits of multiplication of a 64-bit unsigned integer and a +// 128-bit unsigned integer. +inline auto umul192_upper128(uint64_t x, uint128_fallback y) noexcept + -> uint128_fallback { + uint128_fallback r = umul128(x, y.high()); + r += umul128_upper64(x, y.low()); + return r; +} + +FMT_API auto get_cached_power(int k) noexcept -> uint128_fallback; + +// Type-specific information that Dragonbox uses. +template struct float_info; + +template <> struct float_info { + using carrier_uint = uint32_t; + static const int exponent_bits = 8; + static const int kappa = 1; + static const int big_divisor = 100; + static const int small_divisor = 10; + static const int min_k = -31; + static const int max_k = 46; + static const int shorter_interval_tie_lower_threshold = -35; + static const int shorter_interval_tie_upper_threshold = -35; +}; + +template <> struct float_info { + using carrier_uint = uint64_t; + static const int exponent_bits = 11; + static const int kappa = 2; + static const int big_divisor = 1000; + static const int small_divisor = 100; + static const int min_k = -292; + static const int max_k = 341; + static const int shorter_interval_tie_lower_threshold = -77; + static const int shorter_interval_tie_upper_threshold = -77; +}; + +// An 80- or 128-bit floating point number. +template +struct float_info::digits == 64 || + std::numeric_limits::digits == 113 || + is_float128::value>> { + using carrier_uint = detail::uint128_t; + static const int exponent_bits = 15; +}; + +// A double-double floating point number. +template +struct float_info::value>> { + using carrier_uint = detail::uint128_t; +}; + +template struct decimal_fp { + using significand_type = typename float_info::carrier_uint; + significand_type significand; + int exponent; +}; + +template FMT_API auto to_decimal(T x) noexcept -> decimal_fp; +} // namespace dragonbox + +// Returns true iff Float has the implicit bit which is not stored. +template constexpr auto has_implicit_bit() -> bool { + // An 80-bit FP number has a 64-bit significand an no implicit bit. + return std::numeric_limits::digits != 64; +} + +// Returns the number of significand bits stored in Float. The implicit bit is +// not counted since it is not stored. +template constexpr auto num_significand_bits() -> int { + // std::numeric_limits may not support __float128. + return is_float128() ? 112 + : (std::numeric_limits::digits - + (has_implicit_bit() ? 1 : 0)); +} + +template +constexpr auto exponent_mask() -> + typename dragonbox::float_info::carrier_uint { + using float_uint = typename dragonbox::float_info::carrier_uint; + return ((float_uint(1) << dragonbox::float_info::exponent_bits) - 1) + << num_significand_bits(); +} +template constexpr auto exponent_bias() -> int { + // std::numeric_limits may not support __float128. + return is_float128() ? 16383 + : std::numeric_limits::max_exponent - 1; +} + +// Writes the exponent exp in the form "[+-]d{2,3}" to buffer. +template +FMT_CONSTEXPR auto write_exponent(int exp, It it) -> It { + FMT_ASSERT(-10000 < exp && exp < 10000, "exponent out of range"); + if (exp < 0) { + *it++ = static_cast('-'); + exp = -exp; + } else { + *it++ = static_cast('+'); + } + if (exp >= 100) { + const char* top = digits2(to_unsigned(exp / 100)); + if (exp >= 1000) *it++ = static_cast(top[0]); + *it++ = static_cast(top[1]); + exp %= 100; + } + const char* d = digits2(to_unsigned(exp)); + *it++ = static_cast(d[0]); + *it++ = static_cast(d[1]); + return it; +} + +// A floating-point number f * pow(2, e) where F is an unsigned type. +template struct basic_fp { + F f; + int e; + + static constexpr const int num_significand_bits = + static_cast(sizeof(F) * num_bits()); + + constexpr basic_fp() : f(0), e(0) {} + constexpr basic_fp(uint64_t f_val, int e_val) : f(f_val), e(e_val) {} + + // Constructs fp from an IEEE754 floating-point number. + template FMT_CONSTEXPR basic_fp(Float n) { assign(n); } + + // Assigns n to this and return true iff predecessor is closer than successor. + template ::value)> + FMT_CONSTEXPR auto assign(Float n) -> bool { + static_assert(std::numeric_limits::digits <= 113, "unsupported FP"); + // Assume Float is in the format [sign][exponent][significand]. + using carrier_uint = typename dragonbox::float_info::carrier_uint; + const auto num_float_significand_bits = + detail::num_significand_bits(); + const auto implicit_bit = carrier_uint(1) << num_float_significand_bits; + const auto significand_mask = implicit_bit - 1; + auto u = bit_cast(n); + f = static_cast(u & significand_mask); + auto biased_e = static_cast((u & exponent_mask()) >> + num_float_significand_bits); + // The predecessor is closer if n is a normalized power of 2 (f == 0) + // other than the smallest normalized number (biased_e > 1). + auto is_predecessor_closer = f == 0 && biased_e > 1; + if (biased_e == 0) + biased_e = 1; // Subnormals use biased exponent 1 (min exponent). + else if (has_implicit_bit()) + f += static_cast(implicit_bit); + e = biased_e - exponent_bias() - num_float_significand_bits; + if (!has_implicit_bit()) ++e; + return is_predecessor_closer; + } + + template ::value)> + FMT_CONSTEXPR auto assign(Float n) -> bool { + static_assert(std::numeric_limits::is_iec559, "unsupported FP"); + return assign(static_cast(n)); + } +}; + +using fp = basic_fp; + +// Normalizes the value converted from double and multiplied by (1 << SHIFT). +template +FMT_CONSTEXPR auto normalize(basic_fp value) -> basic_fp { + // Handle subnormals. + const auto implicit_bit = F(1) << num_significand_bits(); + const auto shifted_implicit_bit = implicit_bit << SHIFT; + while ((value.f & shifted_implicit_bit) == 0) { + value.f <<= 1; + --value.e; + } + // Subtract 1 to account for hidden bit. + const auto offset = basic_fp::num_significand_bits - + num_significand_bits() - SHIFT - 1; + value.f <<= offset; + value.e -= offset; + return value; +} + +// Computes lhs * rhs / pow(2, 64) rounded to nearest with half-up tie breaking. +FMT_CONSTEXPR inline auto multiply(uint64_t lhs, uint64_t rhs) -> uint64_t { +#if FMT_USE_INT128 + auto product = static_cast<__uint128_t>(lhs) * rhs; + auto f = static_cast(product >> 64); + return (static_cast(product) & (1ULL << 63)) != 0 ? f + 1 : f; +#else + // Multiply 32-bit parts of significands. + uint64_t mask = (1ULL << 32) - 1; + uint64_t a = lhs >> 32, b = lhs & mask; + uint64_t c = rhs >> 32, d = rhs & mask; + uint64_t ac = a * c, bc = b * c, ad = a * d, bd = b * d; + // Compute mid 64-bit of result and round. + uint64_t mid = (bd >> 32) + (ad & mask) + (bc & mask) + (1U << 31); + return ac + (ad >> 32) + (bc >> 32) + (mid >> 32); +#endif +} + +FMT_CONSTEXPR inline auto operator*(fp x, fp y) -> fp { + return {multiply(x.f, y.f), x.e + y.e + 64}; +} + +template () == num_bits()> +using convert_float_result = + conditional_t::value || doublish, double, T>; + +template +constexpr auto convert_float(T value) -> convert_float_result { + return static_cast>(value); +} + +template +FMT_NOINLINE FMT_CONSTEXPR auto fill(OutputIt it, size_t n, + const fill_t& fill) -> OutputIt { + auto fill_size = fill.size(); + if (fill_size == 1) return detail::fill_n(it, n, fill[0]); + auto data = fill.data(); + for (size_t i = 0; i < n; ++i) + it = copy_str(data, data + fill_size, it); + return it; +} + +// Writes the output of f, padded according to format specifications in specs. +// size: output size in code units. +// width: output display width in (terminal) column positions. +template +FMT_CONSTEXPR auto write_padded(OutputIt out, const format_specs& specs, + size_t size, size_t width, F&& f) -> OutputIt { + static_assert(align == align::left || align == align::right, ""); + unsigned spec_width = to_unsigned(specs.width); + size_t padding = spec_width > width ? spec_width - width : 0; + // Shifts are encoded as string literals because static constexpr is not + // supported in constexpr functions. + auto* shifts = align == align::left ? "\x1f\x1f\x00\x01" : "\x00\x1f\x00\x01"; + size_t left_padding = padding >> shifts[specs.align]; + size_t right_padding = padding - left_padding; + auto it = reserve(out, size + padding * specs.fill.size()); + if (left_padding != 0) it = fill(it, left_padding, specs.fill); + it = f(it); + if (right_padding != 0) it = fill(it, right_padding, specs.fill); + return base_iterator(out, it); +} + +template +constexpr auto write_padded(OutputIt out, const format_specs& specs, + size_t size, F&& f) -> OutputIt { + return write_padded(out, specs, size, size, f); +} + +template +FMT_CONSTEXPR auto write_bytes(OutputIt out, string_view bytes, + const format_specs& specs) -> OutputIt { + return write_padded( + out, specs, bytes.size(), [bytes](reserve_iterator it) { + const char* data = bytes.data(); + return copy_str(data, data + bytes.size(), it); + }); +} + +template +auto write_ptr(OutputIt out, UIntPtr value, const format_specs* specs) + -> OutputIt { + int num_digits = count_digits<4>(value); + auto size = to_unsigned(num_digits) + size_t(2); + auto write = [=](reserve_iterator it) { + *it++ = static_cast('0'); + *it++ = static_cast('x'); + return format_uint<4, Char>(it, value, num_digits); + }; + return specs ? write_padded(out, *specs, size, write) + : base_iterator(out, write(reserve(out, size))); +} + +// Returns true iff the code point cp is printable. +FMT_API auto is_printable(uint32_t cp) -> bool; + +inline auto needs_escape(uint32_t cp) -> bool { + return cp < 0x20 || cp == 0x7f || cp == '"' || cp == '\\' || + !is_printable(cp); +} + +template struct find_escape_result { + const Char* begin; + const Char* end; + uint32_t cp; +}; + +template +using make_unsigned_char = + typename conditional_t::value, + std::make_unsigned, + type_identity>::type; + +template +auto find_escape(const Char* begin, const Char* end) + -> find_escape_result { + for (; begin != end; ++begin) { + uint32_t cp = static_cast>(*begin); + if (const_check(sizeof(Char) == 1) && cp >= 0x80) continue; + if (needs_escape(cp)) return {begin, begin + 1, cp}; + } + return {begin, nullptr, 0}; +} + +inline auto find_escape(const char* begin, const char* end) + -> find_escape_result { + if (!is_utf8()) return find_escape(begin, end); + auto result = find_escape_result{end, nullptr, 0}; + for_each_codepoint(string_view(begin, to_unsigned(end - begin)), + [&](uint32_t cp, string_view sv) { + if (needs_escape(cp)) { + result = {sv.begin(), sv.end(), cp}; + return false; + } + return true; + }); + return result; +} + +#define FMT_STRING_IMPL(s, base, explicit) \ + [] { \ + /* Use the hidden visibility as a workaround for a GCC bug (#1973). */ \ + /* Use a macro-like name to avoid shadowing warnings. */ \ + struct FMT_VISIBILITY("hidden") FMT_COMPILE_STRING : base { \ + using char_type FMT_MAYBE_UNUSED = fmt::remove_cvref_t; \ + FMT_MAYBE_UNUSED FMT_CONSTEXPR explicit \ + operator fmt::basic_string_view() const { \ + return fmt::detail_exported::compile_string_to_view(s); \ + } \ + }; \ + return FMT_COMPILE_STRING(); \ + }() + +/** + \rst + Constructs a compile-time format string from a string literal *s*. + + **Example**:: + + // A compile-time error because 'd' is an invalid specifier for strings. + std::string s = fmt::format(FMT_STRING("{:d}"), "foo"); + \endrst + */ +#define FMT_STRING(s) FMT_STRING_IMPL(s, fmt::detail::compile_string, ) + +template +auto write_codepoint(OutputIt out, char prefix, uint32_t cp) -> OutputIt { + *out++ = static_cast('\\'); + *out++ = static_cast(prefix); + Char buf[width]; + fill_n(buf, width, static_cast('0')); + format_uint<4>(buf, cp, width); + return copy_str(buf, buf + width, out); +} + +template +auto write_escaped_cp(OutputIt out, const find_escape_result& escape) + -> OutputIt { + auto c = static_cast(escape.cp); + switch (escape.cp) { + case '\n': + *out++ = static_cast('\\'); + c = static_cast('n'); + break; + case '\r': + *out++ = static_cast('\\'); + c = static_cast('r'); + break; + case '\t': + *out++ = static_cast('\\'); + c = static_cast('t'); + break; + case '"': + FMT_FALLTHROUGH; + case '\'': + FMT_FALLTHROUGH; + case '\\': + *out++ = static_cast('\\'); + break; + default: + if (escape.cp < 0x100) { + return write_codepoint<2, Char>(out, 'x', escape.cp); + } + if (escape.cp < 0x10000) { + return write_codepoint<4, Char>(out, 'u', escape.cp); + } + if (escape.cp < 0x110000) { + return write_codepoint<8, Char>(out, 'U', escape.cp); + } + for (Char escape_char : basic_string_view( + escape.begin, to_unsigned(escape.end - escape.begin))) { + out = write_codepoint<2, Char>(out, 'x', + static_cast(escape_char) & 0xFF); + } + return out; + } + *out++ = c; + return out; +} + +template +auto write_escaped_string(OutputIt out, basic_string_view str) + -> OutputIt { + *out++ = static_cast('"'); + auto begin = str.begin(), end = str.end(); + do { + auto escape = find_escape(begin, end); + out = copy_str(begin, escape.begin, out); + begin = escape.end; + if (!begin) break; + out = write_escaped_cp(out, escape); + } while (begin != end); + *out++ = static_cast('"'); + return out; +} + +template +auto write_escaped_char(OutputIt out, Char v) -> OutputIt { + Char v_array[1] = {v}; + *out++ = static_cast('\''); + if ((needs_escape(static_cast(v)) && v != static_cast('"')) || + v == static_cast('\'')) { + out = write_escaped_cp(out, + find_escape_result{v_array, v_array + 1, + static_cast(v)}); + } else { + *out++ = v; + } + *out++ = static_cast('\''); + return out; +} + +template +FMT_CONSTEXPR auto write_char(OutputIt out, Char value, + const format_specs& specs) -> OutputIt { + bool is_debug = specs.type == presentation_type::debug; + return write_padded(out, specs, 1, [=](reserve_iterator it) { + if (is_debug) return write_escaped_char(it, value); + *it++ = value; + return it; + }); +} +template +FMT_CONSTEXPR auto write(OutputIt out, Char value, + const format_specs& specs, locale_ref loc = {}) + -> OutputIt { + // char is formatted as unsigned char for consistency across platforms. + using unsigned_type = + conditional_t::value, unsigned char, unsigned>; + return check_char_specs(specs) + ? write_char(out, value, specs) + : write(out, static_cast(value), specs, loc); +} + +// Data for write_int that doesn't depend on output iterator type. It is used to +// avoid template code bloat. +template struct write_int_data { + size_t size; + size_t padding; + + FMT_CONSTEXPR write_int_data(int num_digits, unsigned prefix, + const format_specs& specs) + : size((prefix >> 24) + to_unsigned(num_digits)), padding(0) { + if (specs.align == align::numeric) { + auto width = to_unsigned(specs.width); + if (width > size) { + padding = width - size; + size = width; + } + } else if (specs.precision > num_digits) { + size = (prefix >> 24) + to_unsigned(specs.precision); + padding = to_unsigned(specs.precision - num_digits); + } + } +}; + +// Writes an integer in the format +// +// where are written by write_digits(it). +// prefix contains chars in three lower bytes and the size in the fourth byte. +template +FMT_CONSTEXPR FMT_INLINE auto write_int(OutputIt out, int num_digits, + unsigned prefix, + const format_specs& specs, + W write_digits) -> OutputIt { + // Slightly faster check for specs.width == 0 && specs.precision == -1. + if ((specs.width | (specs.precision + 1)) == 0) { + auto it = reserve(out, to_unsigned(num_digits) + (prefix >> 24)); + if (prefix != 0) { + for (unsigned p = prefix & 0xffffff; p != 0; p >>= 8) + *it++ = static_cast(p & 0xff); + } + return base_iterator(out, write_digits(it)); + } + auto data = write_int_data(num_digits, prefix, specs); + return write_padded( + out, specs, data.size, [=](reserve_iterator it) { + for (unsigned p = prefix & 0xffffff; p != 0; p >>= 8) + *it++ = static_cast(p & 0xff); + it = detail::fill_n(it, data.padding, static_cast('0')); + return write_digits(it); + }); +} + +template class digit_grouping { + private: + std::string grouping_; + std::basic_string thousands_sep_; + + struct next_state { + std::string::const_iterator group; + int pos; + }; + auto initial_state() const -> next_state { return {grouping_.begin(), 0}; } + + // Returns the next digit group separator position. + auto next(next_state& state) const -> int { + if (thousands_sep_.empty()) return max_value(); + if (state.group == grouping_.end()) return state.pos += grouping_.back(); + if (*state.group <= 0 || *state.group == max_value()) + return max_value(); + state.pos += *state.group++; + return state.pos; + } + + public: + explicit digit_grouping(locale_ref loc, bool localized = true) { + if (!localized) return; + auto sep = thousands_sep(loc); + grouping_ = sep.grouping; + if (sep.thousands_sep) thousands_sep_.assign(1, sep.thousands_sep); + } + digit_grouping(std::string grouping, std::basic_string sep) + : grouping_(std::move(grouping)), thousands_sep_(std::move(sep)) {} + + auto has_separator() const -> bool { return !thousands_sep_.empty(); } + + auto count_separators(int num_digits) const -> int { + int count = 0; + auto state = initial_state(); + while (num_digits > next(state)) ++count; + return count; + } + + // Applies grouping to digits and write the output to out. + template + auto apply(Out out, basic_string_view digits) const -> Out { + auto num_digits = static_cast(digits.size()); + auto separators = basic_memory_buffer(); + separators.push_back(0); + auto state = initial_state(); + while (int i = next(state)) { + if (i >= num_digits) break; + separators.push_back(i); + } + for (int i = 0, sep_index = static_cast(separators.size() - 1); + i < num_digits; ++i) { + if (num_digits - i == separators[sep_index]) { + out = + copy_str(thousands_sep_.data(), + thousands_sep_.data() + thousands_sep_.size(), out); + --sep_index; + } + *out++ = static_cast(digits[to_unsigned(i)]); + } + return out; + } +}; + +FMT_CONSTEXPR inline void prefix_append(unsigned& prefix, unsigned value) { + prefix |= prefix != 0 ? value << 8 : value; + prefix += (1u + (value > 0xff ? 1 : 0)) << 24; +} + +// Writes a decimal integer with digit grouping. +template +auto write_int(OutputIt out, UInt value, unsigned prefix, + const format_specs& specs, + const digit_grouping& grouping) -> OutputIt { + static_assert(std::is_same, UInt>::value, ""); + int num_digits = 0; + auto buffer = memory_buffer(); + switch (specs.type) { + case presentation_type::none: + case presentation_type::dec: { + num_digits = count_digits(value); + format_decimal(appender(buffer), value, num_digits); + break; + } + case presentation_type::hex_lower: + case presentation_type::hex_upper: { + bool upper = specs.type == presentation_type::hex_upper; + if (specs.alt) + prefix_append(prefix, unsigned(upper ? 'X' : 'x') << 8 | '0'); + num_digits = count_digits<4>(value); + format_uint<4, char>(appender(buffer), value, num_digits, upper); + break; + } + case presentation_type::bin_lower: + case presentation_type::bin_upper: { + bool upper = specs.type == presentation_type::bin_upper; + if (specs.alt) + prefix_append(prefix, unsigned(upper ? 'B' : 'b') << 8 | '0'); + num_digits = count_digits<1>(value); + format_uint<1, char>(appender(buffer), value, num_digits); + break; + } + case presentation_type::oct: { + num_digits = count_digits<3>(value); + // Octal prefix '0' is counted as a digit, so only add it if precision + // is not greater than the number of digits. + if (specs.alt && specs.precision <= num_digits && value != 0) + prefix_append(prefix, '0'); + format_uint<3, char>(appender(buffer), value, num_digits); + break; + } + case presentation_type::chr: + return write_char(out, static_cast(value), specs); + default: + throw_format_error("invalid format specifier"); + } + + unsigned size = (prefix != 0 ? prefix >> 24 : 0) + to_unsigned(num_digits) + + to_unsigned(grouping.count_separators(num_digits)); + return write_padded( + out, specs, size, size, [&](reserve_iterator it) { + for (unsigned p = prefix & 0xffffff; p != 0; p >>= 8) + *it++ = static_cast(p & 0xff); + return grouping.apply(it, string_view(buffer.data(), buffer.size())); + }); +} + +// Writes a localized value. +FMT_API auto write_loc(appender out, loc_value value, + const format_specs<>& specs, locale_ref loc) -> bool; +template +inline auto write_loc(OutputIt, loc_value, const format_specs&, + locale_ref) -> bool { + return false; +} + +template struct write_int_arg { + UInt abs_value; + unsigned prefix; +}; + +template +FMT_CONSTEXPR auto make_write_int_arg(T value, sign_t sign) + -> write_int_arg> { + auto prefix = 0u; + auto abs_value = static_cast>(value); + if (is_negative(value)) { + prefix = 0x01000000 | '-'; + abs_value = 0 - abs_value; + } else { + constexpr const unsigned prefixes[4] = {0, 0, 0x1000000u | '+', + 0x1000000u | ' '}; + prefix = prefixes[sign]; + } + return {abs_value, prefix}; +} + +template struct loc_writer { + buffer_appender out; + const format_specs& specs; + std::basic_string sep; + std::string grouping; + std::basic_string decimal_point; + + template ::value)> + auto operator()(T value) -> bool { + auto arg = make_write_int_arg(value, specs.sign); + write_int(out, static_cast>(arg.abs_value), arg.prefix, + specs, digit_grouping(grouping, sep)); + return true; + } + + template ::value)> + auto operator()(T) -> bool { + return false; + } +}; + +template +FMT_CONSTEXPR FMT_INLINE auto write_int(OutputIt out, write_int_arg arg, + const format_specs& specs, + locale_ref) -> OutputIt { + static_assert(std::is_same>::value, ""); + auto abs_value = arg.abs_value; + auto prefix = arg.prefix; + switch (specs.type) { + case presentation_type::none: + case presentation_type::dec: { + auto num_digits = count_digits(abs_value); + return write_int( + out, num_digits, prefix, specs, [=](reserve_iterator it) { + return format_decimal(it, abs_value, num_digits).end; + }); + } + case presentation_type::hex_lower: + case presentation_type::hex_upper: { + bool upper = specs.type == presentation_type::hex_upper; + if (specs.alt) + prefix_append(prefix, unsigned(upper ? 'X' : 'x') << 8 | '0'); + int num_digits = count_digits<4>(abs_value); + return write_int( + out, num_digits, prefix, specs, [=](reserve_iterator it) { + return format_uint<4, Char>(it, abs_value, num_digits, upper); + }); + } + case presentation_type::bin_lower: + case presentation_type::bin_upper: { + bool upper = specs.type == presentation_type::bin_upper; + if (specs.alt) + prefix_append(prefix, unsigned(upper ? 'B' : 'b') << 8 | '0'); + int num_digits = count_digits<1>(abs_value); + return write_int(out, num_digits, prefix, specs, + [=](reserve_iterator it) { + return format_uint<1, Char>(it, abs_value, num_digits); + }); + } + case presentation_type::oct: { + int num_digits = count_digits<3>(abs_value); + // Octal prefix '0' is counted as a digit, so only add it if precision + // is not greater than the number of digits. + if (specs.alt && specs.precision <= num_digits && abs_value != 0) + prefix_append(prefix, '0'); + return write_int(out, num_digits, prefix, specs, + [=](reserve_iterator it) { + return format_uint<3, Char>(it, abs_value, num_digits); + }); + } + case presentation_type::chr: + return write_char(out, static_cast(abs_value), specs); + default: + throw_format_error("invalid format specifier"); + } + return out; +} +template +FMT_CONSTEXPR FMT_NOINLINE auto write_int_noinline( + OutputIt out, write_int_arg arg, const format_specs& specs, + locale_ref loc) -> OutputIt { + return write_int(out, arg, specs, loc); +} +template ::value && + !std::is_same::value && + std::is_same>::value)> +FMT_CONSTEXPR FMT_INLINE auto write(OutputIt out, T value, + const format_specs& specs, + locale_ref loc) -> OutputIt { + if (specs.localized && write_loc(out, value, specs, loc)) return out; + return write_int_noinline(out, make_write_int_arg(value, specs.sign), specs, + loc); +} +// An inlined version of write used in format string compilation. +template ::value && + !std::is_same::value && + !std::is_same>::value)> +FMT_CONSTEXPR FMT_INLINE auto write(OutputIt out, T value, + const format_specs& specs, + locale_ref loc) -> OutputIt { + if (specs.localized && write_loc(out, value, specs, loc)) return out; + return write_int(out, make_write_int_arg(value, specs.sign), specs, loc); +} + +// An output iterator that counts the number of objects written to it and +// discards them. +class counting_iterator { + private: + size_t count_; + + public: + using iterator_category = std::output_iterator_tag; + using difference_type = std::ptrdiff_t; + using pointer = void; + using reference = void; + FMT_UNCHECKED_ITERATOR(counting_iterator); + + struct value_type { + template FMT_CONSTEXPR void operator=(const T&) {} + }; + + FMT_CONSTEXPR counting_iterator() : count_(0) {} + + FMT_CONSTEXPR auto count() const -> size_t { return count_; } + + FMT_CONSTEXPR auto operator++() -> counting_iterator& { + ++count_; + return *this; + } + FMT_CONSTEXPR auto operator++(int) -> counting_iterator { + auto it = *this; + ++*this; + return it; + } + + FMT_CONSTEXPR friend auto operator+(counting_iterator it, difference_type n) + -> counting_iterator { + it.count_ += static_cast(n); + return it; + } + + FMT_CONSTEXPR auto operator*() const -> value_type { return {}; } +}; + +template +FMT_CONSTEXPR auto write(OutputIt out, basic_string_view s, + const format_specs& specs) -> OutputIt { + auto data = s.data(); + auto size = s.size(); + if (specs.precision >= 0 && to_unsigned(specs.precision) < size) + size = code_point_index(s, to_unsigned(specs.precision)); + bool is_debug = specs.type == presentation_type::debug; + size_t width = 0; + if (specs.width != 0) { + if (is_debug) + width = write_escaped_string(counting_iterator{}, s).count(); + else + width = compute_width(basic_string_view(data, size)); + } + return write_padded(out, specs, size, width, + [=](reserve_iterator it) { + if (is_debug) return write_escaped_string(it, s); + return copy_str(data, data + size, it); + }); +} +template +FMT_CONSTEXPR auto write(OutputIt out, + basic_string_view> s, + const format_specs& specs, locale_ref) + -> OutputIt { + return write(out, s, specs); +} +template +FMT_CONSTEXPR auto write(OutputIt out, const Char* s, + const format_specs& specs, locale_ref) + -> OutputIt { + if (specs.type == presentation_type::pointer) + return write_ptr(out, bit_cast(s), &specs); + if (!s) throw_format_error("string pointer is null"); + return write(out, basic_string_view(s), specs, {}); +} + +template ::value && + !std::is_same::value && + !std::is_same::value)> +FMT_CONSTEXPR auto write(OutputIt out, T value) -> OutputIt { + auto abs_value = static_cast>(value); + bool negative = is_negative(value); + // Don't do -abs_value since it trips unsigned-integer-overflow sanitizer. + if (negative) abs_value = ~abs_value + 1; + int num_digits = count_digits(abs_value); + auto size = (negative ? 1 : 0) + static_cast(num_digits); + auto it = reserve(out, size); + if (auto ptr = to_pointer(it, size)) { + if (negative) *ptr++ = static_cast('-'); + format_decimal(ptr, abs_value, num_digits); + return out; + } + if (negative) *it++ = static_cast('-'); + it = format_decimal(it, abs_value, num_digits).end; + return base_iterator(out, it); +} + +// DEPRECATED! +template +FMT_CONSTEXPR auto parse_align(const Char* begin, const Char* end, + format_specs& specs) -> const Char* { + FMT_ASSERT(begin != end, ""); + auto align = align::none; + auto p = begin + code_point_length(begin); + if (end - p <= 0) p = begin; + for (;;) { + switch (to_ascii(*p)) { + case '<': + align = align::left; + break; + case '>': + align = align::right; + break; + case '^': + align = align::center; + break; + } + if (align != align::none) { + if (p != begin) { + auto c = *begin; + if (c == '}') return begin; + if (c == '{') { + throw_format_error("invalid fill character '{'"); + return begin; + } + specs.fill = {begin, to_unsigned(p - begin)}; + begin = p + 1; + } else { + ++begin; + } + break; + } else if (p == begin) { + break; + } + p = begin; + } + specs.align = align; + return begin; +} + +// A floating-point presentation format. +enum class float_format : unsigned char { + general, // General: exponent notation or fixed point based on magnitude. + exp, // Exponent notation with the default precision of 6, e.g. 1.2e-3. + fixed, // Fixed point with the default precision of 6, e.g. 0.0012. + hex +}; + +struct float_specs { + int precision; + float_format format : 8; + sign_t sign : 8; + bool upper : 1; + bool locale : 1; + bool binary32 : 1; + bool showpoint : 1; +}; + +template +FMT_CONSTEXPR auto parse_float_type_spec(const format_specs& specs) + -> float_specs { + auto result = float_specs(); + result.showpoint = specs.alt; + result.locale = specs.localized; + switch (specs.type) { + case presentation_type::none: + result.format = float_format::general; + break; + case presentation_type::general_upper: + result.upper = true; + FMT_FALLTHROUGH; + case presentation_type::general_lower: + result.format = float_format::general; + break; + case presentation_type::exp_upper: + result.upper = true; + FMT_FALLTHROUGH; + case presentation_type::exp_lower: + result.format = float_format::exp; + result.showpoint |= specs.precision != 0; + break; + case presentation_type::fixed_upper: + result.upper = true; + FMT_FALLTHROUGH; + case presentation_type::fixed_lower: + result.format = float_format::fixed; + result.showpoint |= specs.precision != 0; + break; + case presentation_type::hexfloat_upper: + result.upper = true; + FMT_FALLTHROUGH; + case presentation_type::hexfloat_lower: + result.format = float_format::hex; + break; + default: + throw_format_error("invalid format specifier"); + break; + } + return result; +} + +template +FMT_CONSTEXPR20 auto write_nonfinite(OutputIt out, bool isnan, + format_specs specs, + const float_specs& fspecs) -> OutputIt { + auto str = + isnan ? (fspecs.upper ? "NAN" : "nan") : (fspecs.upper ? "INF" : "inf"); + constexpr size_t str_size = 3; + auto sign = fspecs.sign; + auto size = str_size + (sign ? 1 : 0); + // Replace '0'-padding with space for non-finite values. + const bool is_zero_fill = + specs.fill.size() == 1 && *specs.fill.data() == static_cast('0'); + if (is_zero_fill) specs.fill[0] = static_cast(' '); + return write_padded(out, specs, size, [=](reserve_iterator it) { + if (sign) *it++ = detail::sign(sign); + return copy_str(str, str + str_size, it); + }); +} + +// A decimal floating-point number significand * pow(10, exp). +struct big_decimal_fp { + const char* significand; + int significand_size; + int exponent; +}; + +constexpr auto get_significand_size(const big_decimal_fp& f) -> int { + return f.significand_size; +} +template +inline auto get_significand_size(const dragonbox::decimal_fp& f) -> int { + return count_digits(f.significand); +} + +template +constexpr auto write_significand(OutputIt out, const char* significand, + int significand_size) -> OutputIt { + return copy_str(significand, significand + significand_size, out); +} +template +inline auto write_significand(OutputIt out, UInt significand, + int significand_size) -> OutputIt { + return format_decimal(out, significand, significand_size).end; +} +template +FMT_CONSTEXPR20 auto write_significand(OutputIt out, T significand, + int significand_size, int exponent, + const Grouping& grouping) -> OutputIt { + if (!grouping.has_separator()) { + out = write_significand(out, significand, significand_size); + return detail::fill_n(out, exponent, static_cast('0')); + } + auto buffer = memory_buffer(); + write_significand(appender(buffer), significand, significand_size); + detail::fill_n(appender(buffer), exponent, '0'); + return grouping.apply(out, string_view(buffer.data(), buffer.size())); +} + +template ::value)> +inline auto write_significand(Char* out, UInt significand, int significand_size, + int integral_size, Char decimal_point) -> Char* { + if (!decimal_point) + return format_decimal(out, significand, significand_size).end; + out += significand_size + 1; + Char* end = out; + int floating_size = significand_size - integral_size; + for (int i = floating_size / 2; i > 0; --i) { + out -= 2; + copy2(out, digits2(static_cast(significand % 100))); + significand /= 100; + } + if (floating_size % 2 != 0) { + *--out = static_cast('0' + significand % 10); + significand /= 10; + } + *--out = decimal_point; + format_decimal(out - integral_size, significand, integral_size); + return end; +} + +template >::value)> +inline auto write_significand(OutputIt out, UInt significand, + int significand_size, int integral_size, + Char decimal_point) -> OutputIt { + // Buffer is large enough to hold digits (digits10 + 1) and a decimal point. + Char buffer[digits10() + 2]; + auto end = write_significand(buffer, significand, significand_size, + integral_size, decimal_point); + return detail::copy_str_noinline(buffer, end, out); +} + +template +FMT_CONSTEXPR auto write_significand(OutputIt out, const char* significand, + int significand_size, int integral_size, + Char decimal_point) -> OutputIt { + out = detail::copy_str_noinline(significand, + significand + integral_size, out); + if (!decimal_point) return out; + *out++ = decimal_point; + return detail::copy_str_noinline(significand + integral_size, + significand + significand_size, out); +} + +template +FMT_CONSTEXPR20 auto write_significand(OutputIt out, T significand, + int significand_size, int integral_size, + Char decimal_point, + const Grouping& grouping) -> OutputIt { + if (!grouping.has_separator()) { + return write_significand(out, significand, significand_size, integral_size, + decimal_point); + } + auto buffer = basic_memory_buffer(); + write_significand(buffer_appender(buffer), significand, + significand_size, integral_size, decimal_point); + grouping.apply( + out, basic_string_view(buffer.data(), to_unsigned(integral_size))); + return detail::copy_str_noinline(buffer.data() + integral_size, + buffer.end(), out); +} + +template > +FMT_CONSTEXPR20 auto do_write_float(OutputIt out, const DecimalFP& f, + const format_specs& specs, + float_specs fspecs, locale_ref loc) + -> OutputIt { + auto significand = f.significand; + int significand_size = get_significand_size(f); + const Char zero = static_cast('0'); + auto sign = fspecs.sign; + size_t size = to_unsigned(significand_size) + (sign ? 1 : 0); + using iterator = reserve_iterator; + + Char decimal_point = + fspecs.locale ? detail::decimal_point(loc) : static_cast('.'); + + int output_exp = f.exponent + significand_size - 1; + auto use_exp_format = [=]() { + if (fspecs.format == float_format::exp) return true; + if (fspecs.format != float_format::general) return false; + // Use the fixed notation if the exponent is in [exp_lower, exp_upper), + // e.g. 0.0001 instead of 1e-04. Otherwise use the exponent notation. + const int exp_lower = -4, exp_upper = 16; + return output_exp < exp_lower || + output_exp >= (fspecs.precision > 0 ? fspecs.precision : exp_upper); + }; + if (use_exp_format()) { + int num_zeros = 0; + if (fspecs.showpoint) { + num_zeros = fspecs.precision - significand_size; + if (num_zeros < 0) num_zeros = 0; + size += to_unsigned(num_zeros); + } else if (significand_size == 1) { + decimal_point = Char(); + } + auto abs_output_exp = output_exp >= 0 ? output_exp : -output_exp; + int exp_digits = 2; + if (abs_output_exp >= 100) exp_digits = abs_output_exp >= 1000 ? 4 : 3; + + size += to_unsigned((decimal_point ? 1 : 0) + 2 + exp_digits); + char exp_char = fspecs.upper ? 'E' : 'e'; + auto write = [=](iterator it) { + if (sign) *it++ = detail::sign(sign); + // Insert a decimal point after the first digit and add an exponent. + it = write_significand(it, significand, significand_size, 1, + decimal_point); + if (num_zeros > 0) it = detail::fill_n(it, num_zeros, zero); + *it++ = static_cast(exp_char); + return write_exponent(output_exp, it); + }; + return specs.width > 0 ? write_padded(out, specs, size, write) + : base_iterator(out, write(reserve(out, size))); + } + + int exp = f.exponent + significand_size; + if (f.exponent >= 0) { + // 1234e5 -> 123400000[.0+] + size += to_unsigned(f.exponent); + int num_zeros = fspecs.precision - exp; + abort_fuzzing_if(num_zeros > 5000); + if (fspecs.showpoint) { + ++size; + if (num_zeros <= 0 && fspecs.format != float_format::fixed) num_zeros = 0; + if (num_zeros > 0) size += to_unsigned(num_zeros); + } + auto grouping = Grouping(loc, fspecs.locale); + size += to_unsigned(grouping.count_separators(exp)); + return write_padded(out, specs, size, [&](iterator it) { + if (sign) *it++ = detail::sign(sign); + it = write_significand(it, significand, significand_size, + f.exponent, grouping); + if (!fspecs.showpoint) return it; + *it++ = decimal_point; + return num_zeros > 0 ? detail::fill_n(it, num_zeros, zero) : it; + }); + } else if (exp > 0) { + // 1234e-2 -> 12.34[0+] + int num_zeros = fspecs.showpoint ? fspecs.precision - significand_size : 0; + size += 1 + to_unsigned(num_zeros > 0 ? num_zeros : 0); + auto grouping = Grouping(loc, fspecs.locale); + size += to_unsigned(grouping.count_separators(exp)); + return write_padded(out, specs, size, [&](iterator it) { + if (sign) *it++ = detail::sign(sign); + it = write_significand(it, significand, significand_size, exp, + decimal_point, grouping); + return num_zeros > 0 ? detail::fill_n(it, num_zeros, zero) : it; + }); + } + // 1234e-6 -> 0.001234 + int num_zeros = -exp; + if (significand_size == 0 && fspecs.precision >= 0 && + fspecs.precision < num_zeros) { + num_zeros = fspecs.precision; + } + bool pointy = num_zeros != 0 || significand_size != 0 || fspecs.showpoint; + size += 1 + (pointy ? 1 : 0) + to_unsigned(num_zeros); + return write_padded(out, specs, size, [&](iterator it) { + if (sign) *it++ = detail::sign(sign); + *it++ = zero; + if (!pointy) return it; + *it++ = decimal_point; + it = detail::fill_n(it, num_zeros, zero); + return write_significand(it, significand, significand_size); + }); +} + +template class fallback_digit_grouping { + public: + constexpr fallback_digit_grouping(locale_ref, bool) {} + + constexpr auto has_separator() const -> bool { return false; } + + constexpr auto count_separators(int) const -> int { return 0; } + + template + constexpr auto apply(Out out, basic_string_view) const -> Out { + return out; + } +}; + +template +FMT_CONSTEXPR20 auto write_float(OutputIt out, const DecimalFP& f, + const format_specs& specs, + float_specs fspecs, locale_ref loc) + -> OutputIt { + if (is_constant_evaluated()) { + return do_write_float>(out, f, specs, fspecs, + loc); + } else { + return do_write_float(out, f, specs, fspecs, loc); + } +} + +template constexpr auto isnan(T value) -> bool { + return !(value >= value); // std::isnan doesn't support __float128. +} + +template +struct has_isfinite : std::false_type {}; + +template +struct has_isfinite> + : std::true_type {}; + +template ::value&& + has_isfinite::value)> +FMT_CONSTEXPR20 auto isfinite(T value) -> bool { + constexpr T inf = T(std::numeric_limits::infinity()); + if (is_constant_evaluated()) + return !detail::isnan(value) && value < inf && value > -inf; + return std::isfinite(value); +} +template ::value)> +FMT_CONSTEXPR auto isfinite(T value) -> bool { + T inf = T(std::numeric_limits::infinity()); + // std::isfinite doesn't support __float128. + return !detail::isnan(value) && value < inf && value > -inf; +} + +template ::value)> +FMT_INLINE FMT_CONSTEXPR bool signbit(T value) { + if (is_constant_evaluated()) { +#ifdef __cpp_if_constexpr + if constexpr (std::numeric_limits::is_iec559) { + auto bits = detail::bit_cast(static_cast(value)); + return (bits >> (num_bits() - 1)) != 0; + } +#endif + } + return std::signbit(static_cast(value)); +} + +inline FMT_CONSTEXPR20 void adjust_precision(int& precision, int exp10) { + // Adjust fixed precision by exponent because it is relative to decimal + // point. + if (exp10 > 0 && precision > max_value() - exp10) + FMT_THROW(format_error("number is too big")); + precision += exp10; +} + +class bigint { + private: + // A bigint is stored as an array of bigits (big digits), with bigit at index + // 0 being the least significant one. + using bigit = uint32_t; + using double_bigit = uint64_t; + enum { bigits_capacity = 32 }; + basic_memory_buffer bigits_; + int exp_; + + FMT_CONSTEXPR20 auto operator[](int index) const -> bigit { + return bigits_[to_unsigned(index)]; + } + FMT_CONSTEXPR20 auto operator[](int index) -> bigit& { + return bigits_[to_unsigned(index)]; + } + + static constexpr const int bigit_bits = num_bits(); + + friend struct formatter; + + FMT_CONSTEXPR20 void subtract_bigits(int index, bigit other, bigit& borrow) { + auto result = static_cast((*this)[index]) - other - borrow; + (*this)[index] = static_cast(result); + borrow = static_cast(result >> (bigit_bits * 2 - 1)); + } + + FMT_CONSTEXPR20 void remove_leading_zeros() { + int num_bigits = static_cast(bigits_.size()) - 1; + while (num_bigits > 0 && (*this)[num_bigits] == 0) --num_bigits; + bigits_.resize(to_unsigned(num_bigits + 1)); + } + + // Computes *this -= other assuming aligned bigints and *this >= other. + FMT_CONSTEXPR20 void subtract_aligned(const bigint& other) { + FMT_ASSERT(other.exp_ >= exp_, "unaligned bigints"); + FMT_ASSERT(compare(*this, other) >= 0, ""); + bigit borrow = 0; + int i = other.exp_ - exp_; + for (size_t j = 0, n = other.bigits_.size(); j != n; ++i, ++j) + subtract_bigits(i, other.bigits_[j], borrow); + while (borrow > 0) subtract_bigits(i, 0, borrow); + remove_leading_zeros(); + } + + FMT_CONSTEXPR20 void multiply(uint32_t value) { + const double_bigit wide_value = value; + bigit carry = 0; + for (size_t i = 0, n = bigits_.size(); i < n; ++i) { + double_bigit result = bigits_[i] * wide_value + carry; + bigits_[i] = static_cast(result); + carry = static_cast(result >> bigit_bits); + } + if (carry != 0) bigits_.push_back(carry); + } + + template ::value || + std::is_same::value)> + FMT_CONSTEXPR20 void multiply(UInt value) { + using half_uint = + conditional_t::value, uint64_t, uint32_t>; + const int shift = num_bits() - bigit_bits; + const UInt lower = static_cast(value); + const UInt upper = value >> num_bits(); + UInt carry = 0; + for (size_t i = 0, n = bigits_.size(); i < n; ++i) { + UInt result = lower * bigits_[i] + static_cast(carry); + carry = (upper * bigits_[i] << shift) + (result >> bigit_bits) + + (carry >> bigit_bits); + bigits_[i] = static_cast(result); + } + while (carry != 0) { + bigits_.push_back(static_cast(carry)); + carry >>= bigit_bits; + } + } + + template ::value || + std::is_same::value)> + FMT_CONSTEXPR20 void assign(UInt n) { + size_t num_bigits = 0; + do { + bigits_[num_bigits++] = static_cast(n); + n >>= bigit_bits; + } while (n != 0); + bigits_.resize(num_bigits); + exp_ = 0; + } + + public: + FMT_CONSTEXPR20 bigint() : exp_(0) {} + explicit bigint(uint64_t n) { assign(n); } + + bigint(const bigint&) = delete; + void operator=(const bigint&) = delete; + + FMT_CONSTEXPR20 void assign(const bigint& other) { + auto size = other.bigits_.size(); + bigits_.resize(size); + auto data = other.bigits_.data(); + copy_str(data, data + size, bigits_.data()); + exp_ = other.exp_; + } + + template FMT_CONSTEXPR20 void operator=(Int n) { + FMT_ASSERT(n > 0, ""); + assign(uint64_or_128_t(n)); + } + + FMT_CONSTEXPR20 auto num_bigits() const -> int { + return static_cast(bigits_.size()) + exp_; + } + + FMT_NOINLINE FMT_CONSTEXPR20 auto operator<<=(int shift) -> bigint& { + FMT_ASSERT(shift >= 0, ""); + exp_ += shift / bigit_bits; + shift %= bigit_bits; + if (shift == 0) return *this; + bigit carry = 0; + for (size_t i = 0, n = bigits_.size(); i < n; ++i) { + bigit c = bigits_[i] >> (bigit_bits - shift); + bigits_[i] = (bigits_[i] << shift) + carry; + carry = c; + } + if (carry != 0) bigits_.push_back(carry); + return *this; + } + + template + FMT_CONSTEXPR20 auto operator*=(Int value) -> bigint& { + FMT_ASSERT(value > 0, ""); + multiply(uint32_or_64_or_128_t(value)); + return *this; + } + + friend FMT_CONSTEXPR20 auto compare(const bigint& lhs, const bigint& rhs) + -> int { + int num_lhs_bigits = lhs.num_bigits(), num_rhs_bigits = rhs.num_bigits(); + if (num_lhs_bigits != num_rhs_bigits) + return num_lhs_bigits > num_rhs_bigits ? 1 : -1; + int i = static_cast(lhs.bigits_.size()) - 1; + int j = static_cast(rhs.bigits_.size()) - 1; + int end = i - j; + if (end < 0) end = 0; + for (; i >= end; --i, --j) { + bigit lhs_bigit = lhs[i], rhs_bigit = rhs[j]; + if (lhs_bigit != rhs_bigit) return lhs_bigit > rhs_bigit ? 1 : -1; + } + if (i != j) return i > j ? 1 : -1; + return 0; + } + + // Returns compare(lhs1 + lhs2, rhs). + friend FMT_CONSTEXPR20 auto add_compare(const bigint& lhs1, + const bigint& lhs2, const bigint& rhs) + -> int { + auto minimum = [](int a, int b) { return a < b ? a : b; }; + auto maximum = [](int a, int b) { return a > b ? a : b; }; + int max_lhs_bigits = maximum(lhs1.num_bigits(), lhs2.num_bigits()); + int num_rhs_bigits = rhs.num_bigits(); + if (max_lhs_bigits + 1 < num_rhs_bigits) return -1; + if (max_lhs_bigits > num_rhs_bigits) return 1; + auto get_bigit = [](const bigint& n, int i) -> bigit { + return i >= n.exp_ && i < n.num_bigits() ? n[i - n.exp_] : 0; + }; + double_bigit borrow = 0; + int min_exp = minimum(minimum(lhs1.exp_, lhs2.exp_), rhs.exp_); + for (int i = num_rhs_bigits - 1; i >= min_exp; --i) { + double_bigit sum = + static_cast(get_bigit(lhs1, i)) + get_bigit(lhs2, i); + bigit rhs_bigit = get_bigit(rhs, i); + if (sum > rhs_bigit + borrow) return 1; + borrow = rhs_bigit + borrow - sum; + if (borrow > 1) return -1; + borrow <<= bigit_bits; + } + return borrow != 0 ? -1 : 0; + } + + // Assigns pow(10, exp) to this bigint. + FMT_CONSTEXPR20 void assign_pow10(int exp) { + FMT_ASSERT(exp >= 0, ""); + if (exp == 0) return *this = 1; + // Find the top bit. + int bitmask = 1; + while (exp >= bitmask) bitmask <<= 1; + bitmask >>= 1; + // pow(10, exp) = pow(5, exp) * pow(2, exp). First compute pow(5, exp) by + // repeated squaring and multiplication. + *this = 5; + bitmask >>= 1; + while (bitmask != 0) { + square(); + if ((exp & bitmask) != 0) *this *= 5; + bitmask >>= 1; + } + *this <<= exp; // Multiply by pow(2, exp) by shifting. + } + + FMT_CONSTEXPR20 void square() { + int num_bigits = static_cast(bigits_.size()); + int num_result_bigits = 2 * num_bigits; + basic_memory_buffer n(std::move(bigits_)); + bigits_.resize(to_unsigned(num_result_bigits)); + auto sum = uint128_t(); + for (int bigit_index = 0; bigit_index < num_bigits; ++bigit_index) { + // Compute bigit at position bigit_index of the result by adding + // cross-product terms n[i] * n[j] such that i + j == bigit_index. + for (int i = 0, j = bigit_index; j >= 0; ++i, --j) { + // Most terms are multiplied twice which can be optimized in the future. + sum += static_cast(n[i]) * n[j]; + } + (*this)[bigit_index] = static_cast(sum); + sum >>= num_bits(); // Compute the carry. + } + // Do the same for the top half. + for (int bigit_index = num_bigits; bigit_index < num_result_bigits; + ++bigit_index) { + for (int j = num_bigits - 1, i = bigit_index - j; i < num_bigits;) + sum += static_cast(n[i++]) * n[j--]; + (*this)[bigit_index] = static_cast(sum); + sum >>= num_bits(); + } + remove_leading_zeros(); + exp_ *= 2; + } + + // If this bigint has a bigger exponent than other, adds trailing zero to make + // exponents equal. This simplifies some operations such as subtraction. + FMT_CONSTEXPR20 void align(const bigint& other) { + int exp_difference = exp_ - other.exp_; + if (exp_difference <= 0) return; + int num_bigits = static_cast(bigits_.size()); + bigits_.resize(to_unsigned(num_bigits + exp_difference)); + for (int i = num_bigits - 1, j = i + exp_difference; i >= 0; --i, --j) + bigits_[j] = bigits_[i]; + std::uninitialized_fill_n(bigits_.data(), exp_difference, 0u); + exp_ -= exp_difference; + } + + // Divides this bignum by divisor, assigning the remainder to this and + // returning the quotient. + FMT_CONSTEXPR20 auto divmod_assign(const bigint& divisor) -> int { + FMT_ASSERT(this != &divisor, ""); + if (compare(*this, divisor) < 0) return 0; + FMT_ASSERT(divisor.bigits_[divisor.bigits_.size() - 1u] != 0, ""); + align(divisor); + int quotient = 0; + do { + subtract_aligned(divisor); + ++quotient; + } while (compare(*this, divisor) >= 0); + return quotient; + } +}; + +// format_dragon flags. +enum dragon { + predecessor_closer = 1, + fixup = 2, // Run fixup to correct exp10 which can be off by one. + fixed = 4, +}; + +// Formats a floating-point number using a variation of the Fixed-Precision +// Positive Floating-Point Printout ((FPP)^2) algorithm by Steele & White: +// https://fmt.dev/papers/p372-steele.pdf. +FMT_CONSTEXPR20 inline void format_dragon(basic_fp value, + unsigned flags, int num_digits, + buffer& buf, int& exp10) { + bigint numerator; // 2 * R in (FPP)^2. + bigint denominator; // 2 * S in (FPP)^2. + // lower and upper are differences between value and corresponding boundaries. + bigint lower; // (M^- in (FPP)^2). + bigint upper_store; // upper's value if different from lower. + bigint* upper = nullptr; // (M^+ in (FPP)^2). + // Shift numerator and denominator by an extra bit or two (if lower boundary + // is closer) to make lower and upper integers. This eliminates multiplication + // by 2 during later computations. + bool is_predecessor_closer = (flags & dragon::predecessor_closer) != 0; + int shift = is_predecessor_closer ? 2 : 1; + if (value.e >= 0) { + numerator = value.f; + numerator <<= value.e + shift; + lower = 1; + lower <<= value.e; + if (is_predecessor_closer) { + upper_store = 1; + upper_store <<= value.e + 1; + upper = &upper_store; + } + denominator.assign_pow10(exp10); + denominator <<= shift; + } else if (exp10 < 0) { + numerator.assign_pow10(-exp10); + lower.assign(numerator); + if (is_predecessor_closer) { + upper_store.assign(numerator); + upper_store <<= 1; + upper = &upper_store; + } + numerator *= value.f; + numerator <<= shift; + denominator = 1; + denominator <<= shift - value.e; + } else { + numerator = value.f; + numerator <<= shift; + denominator.assign_pow10(exp10); + denominator <<= shift - value.e; + lower = 1; + if (is_predecessor_closer) { + upper_store = 1ULL << 1; + upper = &upper_store; + } + } + int even = static_cast((value.f & 1) == 0); + if (!upper) upper = &lower; + bool shortest = num_digits < 0; + if ((flags & dragon::fixup) != 0) { + if (add_compare(numerator, *upper, denominator) + even <= 0) { + --exp10; + numerator *= 10; + if (num_digits < 0) { + lower *= 10; + if (upper != &lower) *upper *= 10; + } + } + if ((flags & dragon::fixed) != 0) adjust_precision(num_digits, exp10 + 1); + } + // Invariant: value == (numerator / denominator) * pow(10, exp10). + if (shortest) { + // Generate the shortest representation. + num_digits = 0; + char* data = buf.data(); + for (;;) { + int digit = numerator.divmod_assign(denominator); + bool low = compare(numerator, lower) - even < 0; // numerator <[=] lower. + // numerator + upper >[=] pow10: + bool high = add_compare(numerator, *upper, denominator) + even > 0; + data[num_digits++] = static_cast('0' + digit); + if (low || high) { + if (!low) { + ++data[num_digits - 1]; + } else if (high) { + int result = add_compare(numerator, numerator, denominator); + // Round half to even. + if (result > 0 || (result == 0 && (digit % 2) != 0)) + ++data[num_digits - 1]; + } + buf.try_resize(to_unsigned(num_digits)); + exp10 -= num_digits - 1; + return; + } + numerator *= 10; + lower *= 10; + if (upper != &lower) *upper *= 10; + } + } + // Generate the given number of digits. + exp10 -= num_digits - 1; + if (num_digits <= 0) { + denominator *= 10; + auto digit = add_compare(numerator, numerator, denominator) > 0 ? '1' : '0'; + buf.push_back(digit); + return; + } + buf.try_resize(to_unsigned(num_digits)); + for (int i = 0; i < num_digits - 1; ++i) { + int digit = numerator.divmod_assign(denominator); + buf[i] = static_cast('0' + digit); + numerator *= 10; + } + int digit = numerator.divmod_assign(denominator); + auto result = add_compare(numerator, numerator, denominator); + if (result > 0 || (result == 0 && (digit % 2) != 0)) { + if (digit == 9) { + const auto overflow = '0' + 10; + buf[num_digits - 1] = overflow; + // Propagate the carry. + for (int i = num_digits - 1; i > 0 && buf[i] == overflow; --i) { + buf[i] = '0'; + ++buf[i - 1]; + } + if (buf[0] == overflow) { + buf[0] = '1'; + if ((flags & dragon::fixed) != 0) + buf.push_back('0'); + else + ++exp10; + } + return; + } + ++digit; + } + buf[num_digits - 1] = static_cast('0' + digit); +} + +// Formats a floating-point number using the hexfloat format. +template ::value)> +FMT_CONSTEXPR20 void format_hexfloat(Float value, int precision, + float_specs specs, buffer& buf) { + // float is passed as double to reduce the number of instantiations and to + // simplify implementation. + static_assert(!std::is_same::value, ""); + + using info = dragonbox::float_info; + + // Assume Float is in the format [sign][exponent][significand]. + using carrier_uint = typename info::carrier_uint; + + constexpr auto num_float_significand_bits = + detail::num_significand_bits(); + + basic_fp f(value); + f.e += num_float_significand_bits; + if (!has_implicit_bit()) --f.e; + + constexpr auto num_fraction_bits = + num_float_significand_bits + (has_implicit_bit() ? 1 : 0); + constexpr auto num_xdigits = (num_fraction_bits + 3) / 4; + + constexpr auto leading_shift = ((num_xdigits - 1) * 4); + const auto leading_mask = carrier_uint(0xF) << leading_shift; + const auto leading_xdigit = + static_cast((f.f & leading_mask) >> leading_shift); + if (leading_xdigit > 1) f.e -= (32 - countl_zero(leading_xdigit) - 1); + + int print_xdigits = num_xdigits - 1; + if (precision >= 0 && print_xdigits > precision) { + const int shift = ((print_xdigits - precision - 1) * 4); + const auto mask = carrier_uint(0xF) << shift; + const auto v = static_cast((f.f & mask) >> shift); + + if (v >= 8) { + const auto inc = carrier_uint(1) << (shift + 4); + f.f += inc; + f.f &= ~(inc - 1); + } + + // Check long double overflow + if (!has_implicit_bit()) { + const auto implicit_bit = carrier_uint(1) << num_float_significand_bits; + if ((f.f & implicit_bit) == implicit_bit) { + f.f >>= 4; + f.e += 4; + } + } + + print_xdigits = precision; + } + + char xdigits[num_bits() / 4]; + detail::fill_n(xdigits, sizeof(xdigits), '0'); + format_uint<4>(xdigits, f.f, num_xdigits, specs.upper); + + // Remove zero tail + while (print_xdigits > 0 && xdigits[print_xdigits] == '0') --print_xdigits; + + buf.push_back('0'); + buf.push_back(specs.upper ? 'X' : 'x'); + buf.push_back(xdigits[0]); + if (specs.showpoint || print_xdigits > 0 || print_xdigits < precision) + buf.push_back('.'); + buf.append(xdigits + 1, xdigits + 1 + print_xdigits); + for (; print_xdigits < precision; ++print_xdigits) buf.push_back('0'); + + buf.push_back(specs.upper ? 'P' : 'p'); + + uint32_t abs_e; + if (f.e < 0) { + buf.push_back('-'); + abs_e = static_cast(-f.e); + } else { + buf.push_back('+'); + abs_e = static_cast(f.e); + } + format_decimal(appender(buf), abs_e, detail::count_digits(abs_e)); +} + +template ::value)> +FMT_CONSTEXPR20 void format_hexfloat(Float value, int precision, + float_specs specs, buffer& buf) { + format_hexfloat(static_cast(value), precision, specs, buf); +} + +constexpr auto fractional_part_rounding_thresholds(int index) -> uint32_t { + // For checking rounding thresholds. + // The kth entry is chosen to be the smallest integer such that the + // upper 32-bits of 10^(k+1) times it is strictly bigger than 5 * 10^k. + // It is equal to ceil(2^31 + 2^32/10^(k + 1)). + // These are stored in a string literal because we cannot have static arrays + // in constexpr functions and non-static ones are poorly optimized. + return U"\x9999999a\x828f5c29\x80418938\x80068db9\x8000a7c6\x800010c7" + U"\x800001ae\x8000002b"[index]; +} + +template +FMT_CONSTEXPR20 auto format_float(Float value, int precision, float_specs specs, + buffer& buf) -> int { + // float is passed as double to reduce the number of instantiations. + static_assert(!std::is_same::value, ""); + FMT_ASSERT(value >= 0, "value is negative"); + auto converted_value = convert_float(value); + + const bool fixed = specs.format == float_format::fixed; + if (value <= 0) { // <= instead of == to silence a warning. + if (precision <= 0 || !fixed) { + buf.push_back('0'); + return 0; + } + buf.try_resize(to_unsigned(precision)); + fill_n(buf.data(), precision, '0'); + return -precision; + } + + int exp = 0; + bool use_dragon = true; + unsigned dragon_flags = 0; + if (!is_fast_float() || is_constant_evaluated()) { + const auto inv_log2_10 = 0.3010299956639812; // 1 / log2(10) + using info = dragonbox::float_info; + const auto f = basic_fp(converted_value); + // Compute exp, an approximate power of 10, such that + // 10^(exp - 1) <= value < 10^exp or 10^exp <= value < 10^(exp + 1). + // This is based on log10(value) == log2(value) / log2(10) and approximation + // of log2(value) by e + num_fraction_bits idea from double-conversion. + auto e = (f.e + count_digits<1>(f.f) - 1) * inv_log2_10 - 1e-10; + exp = static_cast(e); + if (e > exp) ++exp; // Compute ceil. + dragon_flags = dragon::fixup; + } else if (precision < 0) { + // Use Dragonbox for the shortest format. + if (specs.binary32) { + auto dec = dragonbox::to_decimal(static_cast(value)); + write(buffer_appender(buf), dec.significand); + return dec.exponent; + } + auto dec = dragonbox::to_decimal(static_cast(value)); + write(buffer_appender(buf), dec.significand); + return dec.exponent; + } else { + // Extract significand bits and exponent bits. + using info = dragonbox::float_info; + auto br = bit_cast(static_cast(value)); + + const uint64_t significand_mask = + (static_cast(1) << num_significand_bits()) - 1; + uint64_t significand = (br & significand_mask); + int exponent = static_cast((br & exponent_mask()) >> + num_significand_bits()); + + if (exponent != 0) { // Check if normal. + exponent -= exponent_bias() + num_significand_bits(); + significand |= + (static_cast(1) << num_significand_bits()); + significand <<= 1; + } else { + // Normalize subnormal inputs. + FMT_ASSERT(significand != 0, "zeros should not appear here"); + int shift = countl_zero(significand); + FMT_ASSERT(shift >= num_bits() - num_significand_bits(), + ""); + shift -= (num_bits() - num_significand_bits() - 2); + exponent = (std::numeric_limits::min_exponent - + num_significand_bits()) - + shift; + significand <<= shift; + } + + // Compute the first several nonzero decimal significand digits. + // We call the number we get the first segment. + const int k = info::kappa - dragonbox::floor_log10_pow2(exponent); + exp = -k; + const int beta = exponent + dragonbox::floor_log2_pow10(k); + uint64_t first_segment; + bool has_more_segments; + int digits_in_the_first_segment; + { + const auto r = dragonbox::umul192_upper128( + significand << beta, dragonbox::get_cached_power(k)); + first_segment = r.high(); + has_more_segments = r.low() != 0; + + // The first segment can have 18 ~ 19 digits. + if (first_segment >= 1000000000000000000ULL) { + digits_in_the_first_segment = 19; + } else { + // When it is of 18-digits, we align it to 19-digits by adding a bogus + // zero at the end. + digits_in_the_first_segment = 18; + first_segment *= 10; + } + } + + // Compute the actual number of decimal digits to print. + if (fixed) adjust_precision(precision, exp + digits_in_the_first_segment); + + // Use Dragon4 only when there might be not enough digits in the first + // segment. + if (digits_in_the_first_segment > precision) { + use_dragon = false; + + if (precision <= 0) { + exp += digits_in_the_first_segment; + + if (precision < 0) { + // Nothing to do, since all we have are just leading zeros. + buf.try_resize(0); + } else { + // We may need to round-up. + buf.try_resize(1); + if ((first_segment | static_cast(has_more_segments)) > + 5000000000000000000ULL) { + buf[0] = '1'; + } else { + buf[0] = '0'; + } + } + } // precision <= 0 + else { + exp += digits_in_the_first_segment - precision; + + // When precision > 0, we divide the first segment into three + // subsegments, each with 9, 9, and 0 ~ 1 digits so that each fits + // in 32-bits which usually allows faster calculation than in + // 64-bits. Since some compiler (e.g. MSVC) doesn't know how to optimize + // division-by-constant for large 64-bit divisors, we do it here + // manually. The magic number 7922816251426433760 below is equal to + // ceil(2^(64+32) / 10^10). + const uint32_t first_subsegment = static_cast( + dragonbox::umul128_upper64(first_segment, 7922816251426433760ULL) >> + 32); + const uint64_t second_third_subsegments = + first_segment - first_subsegment * 10000000000ULL; + + uint64_t prod; + uint32_t digits; + bool should_round_up; + int number_of_digits_to_print = precision > 9 ? 9 : precision; + + // Print a 9-digits subsegment, either the first or the second. + auto print_subsegment = [&](uint32_t subsegment, char* buffer) { + int number_of_digits_printed = 0; + + // If we want to print an odd number of digits from the subsegment, + if ((number_of_digits_to_print & 1) != 0) { + // Convert to 64-bit fixed-point fractional form with 1-digit + // integer part. The magic number 720575941 is a good enough + // approximation of 2^(32 + 24) / 10^8; see + // https://jk-jeon.github.io/posts/2022/12/fixed-precision-formatting/#fixed-length-case + // for details. + prod = ((subsegment * static_cast(720575941)) >> 24) + 1; + digits = static_cast(prod >> 32); + *buffer = static_cast('0' + digits); + number_of_digits_printed++; + } + // If we want to print an even number of digits from the + // first_subsegment, + else { + // Convert to 64-bit fixed-point fractional form with 2-digits + // integer part. The magic number 450359963 is a good enough + // approximation of 2^(32 + 20) / 10^7; see + // https://jk-jeon.github.io/posts/2022/12/fixed-precision-formatting/#fixed-length-case + // for details. + prod = ((subsegment * static_cast(450359963)) >> 20) + 1; + digits = static_cast(prod >> 32); + copy2(buffer, digits2(digits)); + number_of_digits_printed += 2; + } + + // Print all digit pairs. + while (number_of_digits_printed < number_of_digits_to_print) { + prod = static_cast(prod) * static_cast(100); + digits = static_cast(prod >> 32); + copy2(buffer + number_of_digits_printed, digits2(digits)); + number_of_digits_printed += 2; + } + }; + + // Print first subsegment. + print_subsegment(first_subsegment, buf.data()); + + // Perform rounding if the first subsegment is the last subsegment to + // print. + if (precision <= 9) { + // Rounding inside the subsegment. + // We round-up if: + // - either the fractional part is strictly larger than 1/2, or + // - the fractional part is exactly 1/2 and the last digit is odd. + // We rely on the following observations: + // - If fractional_part >= threshold, then the fractional part is + // strictly larger than 1/2. + // - If the MSB of fractional_part is set, then the fractional part + // must be at least 1/2. + // - When the MSB of fractional_part is set, either + // second_third_subsegments being nonzero or has_more_segments + // being true means there are further digits not printed, so the + // fractional part is strictly larger than 1/2. + if (precision < 9) { + uint32_t fractional_part = static_cast(prod); + should_round_up = + fractional_part >= fractional_part_rounding_thresholds( + 8 - number_of_digits_to_print) || + ((fractional_part >> 31) & + ((digits & 1) | (second_third_subsegments != 0) | + has_more_segments)) != 0; + } + // Rounding at the subsegment boundary. + // In this case, the fractional part is at least 1/2 if and only if + // second_third_subsegments >= 5000000000ULL, and is strictly larger + // than 1/2 if we further have either second_third_subsegments > + // 5000000000ULL or has_more_segments == true. + else { + should_round_up = second_third_subsegments > 5000000000ULL || + (second_third_subsegments == 5000000000ULL && + ((digits & 1) != 0 || has_more_segments)); + } + } + // Otherwise, print the second subsegment. + else { + // Compilers are not aware of how to leverage the maximum value of + // second_third_subsegments to find out a better magic number which + // allows us to eliminate an additional shift. 1844674407370955162 = + // ceil(2^64/10) < ceil(2^64*(10^9/(10^10 - 1))). + const uint32_t second_subsegment = + static_cast(dragonbox::umul128_upper64( + second_third_subsegments, 1844674407370955162ULL)); + const uint32_t third_subsegment = + static_cast(second_third_subsegments) - + second_subsegment * 10; + + number_of_digits_to_print = precision - 9; + print_subsegment(second_subsegment, buf.data() + 9); + + // Rounding inside the subsegment. + if (precision < 18) { + // The condition third_subsegment != 0 implies that the segment was + // of 19 digits, so in this case the third segment should be + // consisting of a genuine digit from the input. + uint32_t fractional_part = static_cast(prod); + should_round_up = + fractional_part >= fractional_part_rounding_thresholds( + 8 - number_of_digits_to_print) || + ((fractional_part >> 31) & + ((digits & 1) | (third_subsegment != 0) | + has_more_segments)) != 0; + } + // Rounding at the subsegment boundary. + else { + // In this case, the segment must be of 19 digits, thus + // the third subsegment should be consisting of a genuine digit from + // the input. + should_round_up = third_subsegment > 5 || + (third_subsegment == 5 && + ((digits & 1) != 0 || has_more_segments)); + } + } + + // Round-up if necessary. + if (should_round_up) { + ++buf[precision - 1]; + for (int i = precision - 1; i > 0 && buf[i] > '9'; --i) { + buf[i] = '0'; + ++buf[i - 1]; + } + if (buf[0] > '9') { + buf[0] = '1'; + if (fixed) + buf[precision++] = '0'; + else + ++exp; + } + } + buf.try_resize(to_unsigned(precision)); + } + } // if (digits_in_the_first_segment > precision) + else { + // Adjust the exponent for its use in Dragon4. + exp += digits_in_the_first_segment - 1; + } + } + if (use_dragon) { + auto f = basic_fp(); + bool is_predecessor_closer = specs.binary32 + ? f.assign(static_cast(value)) + : f.assign(converted_value); + if (is_predecessor_closer) dragon_flags |= dragon::predecessor_closer; + if (fixed) dragon_flags |= dragon::fixed; + // Limit precision to the maximum possible number of significant digits in + // an IEEE754 double because we don't need to generate zeros. + const int max_double_digits = 767; + if (precision > max_double_digits) precision = max_double_digits; + format_dragon(f, dragon_flags, precision, buf, exp); + } + if (!fixed && !specs.showpoint) { + // Remove trailing zeros. + auto num_digits = buf.size(); + while (num_digits > 0 && buf[num_digits - 1] == '0') { + --num_digits; + ++exp; + } + buf.try_resize(num_digits); + } + return exp; +} +template +FMT_CONSTEXPR20 auto write_float(OutputIt out, T value, + format_specs specs, locale_ref loc) + -> OutputIt { + float_specs fspecs = parse_float_type_spec(specs); + fspecs.sign = specs.sign; + if (detail::signbit(value)) { // value < 0 is false for NaN so use signbit. + fspecs.sign = sign::minus; + value = -value; + } else if (fspecs.sign == sign::minus) { + fspecs.sign = sign::none; + } + + if (!detail::isfinite(value)) + return write_nonfinite(out, detail::isnan(value), specs, fspecs); + + if (specs.align == align::numeric && fspecs.sign) { + auto it = reserve(out, 1); + *it++ = detail::sign(fspecs.sign); + out = base_iterator(out, it); + fspecs.sign = sign::none; + if (specs.width != 0) --specs.width; + } + + memory_buffer buffer; + if (fspecs.format == float_format::hex) { + if (fspecs.sign) buffer.push_back(detail::sign(fspecs.sign)); + format_hexfloat(convert_float(value), specs.precision, fspecs, buffer); + return write_bytes(out, {buffer.data(), buffer.size()}, + specs); + } + int precision = specs.precision >= 0 || specs.type == presentation_type::none + ? specs.precision + : 6; + if (fspecs.format == float_format::exp) { + if (precision == max_value()) + throw_format_error("number is too big"); + else + ++precision; + } else if (fspecs.format != float_format::fixed && precision == 0) { + precision = 1; + } + if (const_check(std::is_same())) fspecs.binary32 = true; + int exp = format_float(convert_float(value), precision, fspecs, buffer); + fspecs.precision = precision; + auto f = big_decimal_fp{buffer.data(), static_cast(buffer.size()), exp}; + return write_float(out, f, specs, fspecs, loc); +} + +template ::value)> +FMT_CONSTEXPR20 auto write(OutputIt out, T value, format_specs specs, + locale_ref loc = {}) -> OutputIt { + if (const_check(!is_supported_floating_point(value))) return out; + return specs.localized && write_loc(out, value, specs, loc) + ? out + : write_float(out, value, specs, loc); +} + +template ::value)> +FMT_CONSTEXPR20 auto write(OutputIt out, T value) -> OutputIt { + if (is_constant_evaluated()) return write(out, value, format_specs()); + if (const_check(!is_supported_floating_point(value))) return out; + + auto fspecs = float_specs(); + if (detail::signbit(value)) { + fspecs.sign = sign::minus; + value = -value; + } + + constexpr auto specs = format_specs(); + using floaty = conditional_t::value, double, T>; + using floaty_uint = typename dragonbox::float_info::carrier_uint; + floaty_uint mask = exponent_mask(); + if ((bit_cast(value) & mask) == mask) + return write_nonfinite(out, std::isnan(value), specs, fspecs); + + auto dec = dragonbox::to_decimal(static_cast(value)); + return write_float(out, dec, specs, fspecs, {}); +} + +template ::value && + !is_fast_float::value)> +inline auto write(OutputIt out, T value) -> OutputIt { + return write(out, value, format_specs()); +} + +template +auto write(OutputIt out, monostate, format_specs = {}, locale_ref = {}) + -> OutputIt { + FMT_ASSERT(false, ""); + return out; +} + +template +FMT_CONSTEXPR auto write(OutputIt out, basic_string_view value) + -> OutputIt { + auto it = reserve(out, value.size()); + it = copy_str_noinline(value.begin(), value.end(), it); + return base_iterator(out, it); +} + +template ::value)> +constexpr auto write(OutputIt out, const T& value) -> OutputIt { + return write(out, to_string_view(value)); +} + +// FMT_ENABLE_IF() condition separated to workaround an MSVC bug. +template < + typename Char, typename OutputIt, typename T, + bool check = + std::is_enum::value && !std::is_same::value && + mapped_type_constant>::value != + type::custom_type, + FMT_ENABLE_IF(check)> +FMT_CONSTEXPR auto write(OutputIt out, T value) -> OutputIt { + return write(out, static_cast>(value)); +} + +template ::value)> +FMT_CONSTEXPR auto write(OutputIt out, T value, + const format_specs& specs = {}, locale_ref = {}) + -> OutputIt { + return specs.type != presentation_type::none && + specs.type != presentation_type::string + ? write(out, value ? 1 : 0, specs, {}) + : write_bytes(out, value ? "true" : "false", specs); +} + +template +FMT_CONSTEXPR auto write(OutputIt out, Char value) -> OutputIt { + auto it = reserve(out, 1); + *it++ = value; + return base_iterator(out, it); +} + +template +FMT_CONSTEXPR_CHAR_TRAITS auto write(OutputIt out, const Char* value) + -> OutputIt { + if (value) return write(out, basic_string_view(value)); + throw_format_error("string pointer is null"); + return out; +} + +template ::value)> +auto write(OutputIt out, const T* value, const format_specs& specs = {}, + locale_ref = {}) -> OutputIt { + return write_ptr(out, bit_cast(value), &specs); +} + +// A write overload that handles implicit conversions. +template > +FMT_CONSTEXPR auto write(OutputIt out, const T& value) -> enable_if_t< + std::is_class::value && !is_string::value && + !is_floating_point::value && !std::is_same::value && + !std::is_same().map( + value))>>::value, + OutputIt> { + return write(out, arg_mapper().map(value)); +} + +template > +FMT_CONSTEXPR auto write(OutputIt out, const T& value) + -> enable_if_t::value == type::custom_type, + OutputIt> { + auto formatter = typename Context::template formatter_type(); + auto parse_ctx = typename Context::parse_context_type({}); + formatter.parse(parse_ctx); + auto ctx = Context(out, {}, {}); + return formatter.format(value, ctx); +} + +// An argument visitor that formats the argument and writes it via the output +// iterator. It's a class and not a generic lambda for compatibility with C++11. +template struct default_arg_formatter { + using iterator = buffer_appender; + using context = buffer_context; + + iterator out; + basic_format_args args; + locale_ref loc; + + template auto operator()(T value) -> iterator { + return write(out, value); + } + auto operator()(typename basic_format_arg::handle h) -> iterator { + basic_format_parse_context parse_ctx({}); + context format_ctx(out, args, loc); + h.format(parse_ctx, format_ctx); + return format_ctx.out(); + } +}; + +template struct arg_formatter { + using iterator = buffer_appender; + using context = buffer_context; + + iterator out; + const format_specs& specs; + locale_ref locale; + + template + FMT_CONSTEXPR FMT_INLINE auto operator()(T value) -> iterator { + return detail::write(out, value, specs, locale); + } + auto operator()(typename basic_format_arg::handle) -> iterator { + // User-defined types are handled separately because they require access + // to the parse context. + return out; + } +}; + +struct width_checker { + template ::value)> + FMT_CONSTEXPR auto operator()(T value) -> unsigned long long { + if (is_negative(value)) throw_format_error("negative width"); + return static_cast(value); + } + + template ::value)> + FMT_CONSTEXPR auto operator()(T) -> unsigned long long { + throw_format_error("width is not integer"); + return 0; + } +}; + +struct precision_checker { + template ::value)> + FMT_CONSTEXPR auto operator()(T value) -> unsigned long long { + if (is_negative(value)) throw_format_error("negative precision"); + return static_cast(value); + } + + template ::value)> + FMT_CONSTEXPR auto operator()(T) -> unsigned long long { + throw_format_error("precision is not integer"); + return 0; + } +}; + +template +FMT_CONSTEXPR auto get_dynamic_spec(FormatArg arg) -> int { + unsigned long long value = visit_format_arg(Handler(), arg); + if (value > to_unsigned(max_value())) + throw_format_error("number is too big"); + return static_cast(value); +} + +template +FMT_CONSTEXPR auto get_arg(Context& ctx, ID id) -> decltype(ctx.arg(id)) { + auto arg = ctx.arg(id); + if (!arg) ctx.on_error("argument not found"); + return arg; +} + +template +FMT_CONSTEXPR void handle_dynamic_spec(int& value, + arg_ref ref, + Context& ctx) { + switch (ref.kind) { + case arg_id_kind::none: + break; + case arg_id_kind::index: + value = detail::get_dynamic_spec(get_arg(ctx, ref.val.index)); + break; + case arg_id_kind::name: + value = detail::get_dynamic_spec(get_arg(ctx, ref.val.name)); + break; + } +} + +#if FMT_USE_USER_DEFINED_LITERALS +# if FMT_USE_NONTYPE_TEMPLATE_ARGS +template Str> +struct statically_named_arg : view { + static constexpr auto name = Str.data; + + const T& value; + statically_named_arg(const T& v) : value(v) {} +}; + +template Str> +struct is_named_arg> : std::true_type {}; + +template Str> +struct is_statically_named_arg> + : std::true_type {}; + +template Str> +struct udl_arg { + template auto operator=(T&& value) const { + return statically_named_arg(std::forward(value)); + } +}; +# else +template struct udl_arg { + const Char* str; + + template auto operator=(T&& value) const -> named_arg { + return {str, std::forward(value)}; + } +}; +# endif +#endif // FMT_USE_USER_DEFINED_LITERALS + +template +auto vformat(const Locale& loc, basic_string_view fmt, + basic_format_args>> args) + -> std::basic_string { + auto buf = basic_memory_buffer(); + detail::vformat_to(buf, fmt, args, detail::locale_ref(loc)); + return {buf.data(), buf.size()}; +} + +using format_func = void (*)(detail::buffer&, int, const char*); + +FMT_API void format_error_code(buffer& out, int error_code, + string_view message) noexcept; + +FMT_API void report_error(format_func func, int error_code, + const char* message) noexcept; +} // namespace detail + +FMT_API auto vsystem_error(int error_code, string_view format_str, + format_args args) -> std::system_error; + +/** + \rst + Constructs :class:`std::system_error` with a message formatted with + ``fmt::format(fmt, args...)``. + *error_code* is a system error code as given by ``errno``. + + **Example**:: + + // This throws std::system_error with the description + // cannot open file 'madeup': No such file or directory + // or similar (system message may vary). + const char* filename = "madeup"; + std::FILE* file = std::fopen(filename, "r"); + if (!file) + throw fmt::system_error(errno, "cannot open file '{}'", filename); + \endrst + */ +template +auto system_error(int error_code, format_string fmt, T&&... args) + -> std::system_error { + return vsystem_error(error_code, fmt, fmt::make_format_args(args...)); +} + +/** + \rst + Formats an error message for an error returned by an operating system or a + language runtime, for example a file opening error, and writes it to *out*. + The format is the same as the one used by ``std::system_error(ec, message)`` + where ``ec`` is ``std::error_code(error_code, std::generic_category()})``. + It is implementation-defined but normally looks like: + + .. parsed-literal:: + **: ** + + where ** is the passed message and ** is the system + message corresponding to the error code. + *error_code* is a system error code as given by ``errno``. + \endrst + */ +FMT_API void format_system_error(detail::buffer& out, int error_code, + const char* message) noexcept; + +// Reports a system error without throwing an exception. +// Can be used to report errors from destructors. +FMT_API void report_system_error(int error_code, const char* message) noexcept; + +/** Fast integer formatter. */ +class format_int { + private: + // Buffer should be large enough to hold all digits (digits10 + 1), + // a sign and a null character. + enum { buffer_size = std::numeric_limits::digits10 + 3 }; + mutable char buffer_[buffer_size]; + char* str_; + + template auto format_unsigned(UInt value) -> char* { + auto n = static_cast>(value); + return detail::format_decimal(buffer_, n, buffer_size - 1).begin; + } + + template auto format_signed(Int value) -> char* { + auto abs_value = static_cast>(value); + bool negative = value < 0; + if (negative) abs_value = 0 - abs_value; + auto begin = format_unsigned(abs_value); + if (negative) *--begin = '-'; + return begin; + } + + public: + explicit format_int(int value) : str_(format_signed(value)) {} + explicit format_int(long value) : str_(format_signed(value)) {} + explicit format_int(long long value) : str_(format_signed(value)) {} + explicit format_int(unsigned value) : str_(format_unsigned(value)) {} + explicit format_int(unsigned long value) : str_(format_unsigned(value)) {} + explicit format_int(unsigned long long value) + : str_(format_unsigned(value)) {} + + /** Returns the number of characters written to the output buffer. */ + auto size() const -> size_t { + return detail::to_unsigned(buffer_ - str_ + buffer_size - 1); + } + + /** + Returns a pointer to the output buffer content. No terminating null + character is appended. + */ + auto data() const -> const char* { return str_; } + + /** + Returns a pointer to the output buffer content with terminating null + character appended. + */ + auto c_str() const -> const char* { + buffer_[buffer_size - 1] = '\0'; + return str_; + } + + /** + \rst + Returns the content of the output buffer as an ``std::string``. + \endrst + */ + auto str() const -> std::string { return std::string(str_, size()); } +}; + +template +struct formatter::value>> + : formatter, Char> { + template + auto format(const T& value, FormatContext& ctx) const -> decltype(ctx.out()) { + using base = formatter, Char>; + return base::format(format_as(value), ctx); + } +}; + +#define FMT_FORMAT_AS(Type, Base) \ + template \ + struct formatter : formatter {} + +FMT_FORMAT_AS(signed char, int); +FMT_FORMAT_AS(unsigned char, unsigned); +FMT_FORMAT_AS(short, int); +FMT_FORMAT_AS(unsigned short, unsigned); +FMT_FORMAT_AS(long, detail::long_type); +FMT_FORMAT_AS(unsigned long, detail::ulong_type); +FMT_FORMAT_AS(Char*, const Char*); +FMT_FORMAT_AS(std::basic_string, basic_string_view); +FMT_FORMAT_AS(std::nullptr_t, const void*); +FMT_FORMAT_AS(detail::std_string_view, basic_string_view); +FMT_FORMAT_AS(void*, const void*); + +template +struct formatter : formatter, Char> {}; + +/** + \rst + Converts ``p`` to ``const void*`` for pointer formatting. + + **Example**:: + + auto s = fmt::format("{}", fmt::ptr(p)); + \endrst + */ +template auto ptr(T p) -> const void* { + static_assert(std::is_pointer::value, ""); + return detail::bit_cast(p); +} +template +auto ptr(const std::unique_ptr& p) -> const void* { + return p.get(); +} +template auto ptr(const std::shared_ptr& p) -> const void* { + return p.get(); +} + +/** + \rst + Converts ``e`` to the underlying type. + + **Example**:: + + enum class color { red, green, blue }; + auto s = fmt::format("{}", fmt::underlying(color::red)); + \endrst + */ +template +constexpr auto underlying(Enum e) noexcept -> underlying_t { + return static_cast>(e); +} + +namespace enums { +template ::value)> +constexpr auto format_as(Enum e) noexcept -> underlying_t { + return static_cast>(e); +} +} // namespace enums + +class bytes { + private: + string_view data_; + friend struct formatter; + + public: + explicit bytes(string_view data) : data_(data) {} +}; + +template <> struct formatter { + private: + detail::dynamic_format_specs<> specs_; + + public: + template + FMT_CONSTEXPR auto parse(ParseContext& ctx) -> const char* { + return parse_format_specs(ctx.begin(), ctx.end(), specs_, ctx, + detail::type::string_type); + } + + template + auto format(bytes b, FormatContext& ctx) -> decltype(ctx.out()) { + detail::handle_dynamic_spec(specs_.width, + specs_.width_ref, ctx); + detail::handle_dynamic_spec( + specs_.precision, specs_.precision_ref, ctx); + return detail::write_bytes(ctx.out(), b.data_, specs_); + } +}; + +// group_digits_view is not derived from view because it copies the argument. +template struct group_digits_view { + T value; +}; + +/** + \rst + Returns a view that formats an integer value using ',' as a locale-independent + thousands separator. + + **Example**:: + + fmt::print("{}", fmt::group_digits(12345)); + // Output: "12,345" + \endrst + */ +template auto group_digits(T value) -> group_digits_view { + return {value}; +} + +template struct formatter> : formatter { + private: + detail::dynamic_format_specs<> specs_; + + public: + template + FMT_CONSTEXPR auto parse(ParseContext& ctx) -> const char* { + return parse_format_specs(ctx.begin(), ctx.end(), specs_, ctx, + detail::type::int_type); + } + + template + auto format(group_digits_view t, FormatContext& ctx) + -> decltype(ctx.out()) { + detail::handle_dynamic_spec(specs_.width, + specs_.width_ref, ctx); + detail::handle_dynamic_spec( + specs_.precision, specs_.precision_ref, ctx); + return detail::write_int( + ctx.out(), static_cast>(t.value), 0, specs_, + detail::digit_grouping("\3", ",")); + } +}; + +template struct nested_view { + const formatter* fmt; + const T* value; +}; + +template struct formatter> { + FMT_CONSTEXPR auto parse(format_parse_context& ctx) -> const char* { + return ctx.begin(); + } + auto format(nested_view view, format_context& ctx) const + -> decltype(ctx.out()) { + return view.fmt->format(*view.value, ctx); + } +}; + +template struct nested_formatter { + private: + int width_; + detail::fill_t fill_; + align_t align_ : 4; + formatter formatter_; + + public: + constexpr nested_formatter() : width_(0), align_(align_t::none) {} + + FMT_CONSTEXPR auto parse(format_parse_context& ctx) -> const char* { + auto specs = detail::dynamic_format_specs(); + auto it = parse_format_specs(ctx.begin(), ctx.end(), specs, ctx, + detail::type::none_type); + width_ = specs.width; + fill_ = specs.fill; + align_ = specs.align; + ctx.advance_to(it); + return formatter_.parse(ctx); + } + + template + auto write_padded(format_context& ctx, F write) const -> decltype(ctx.out()) { + if (width_ == 0) return write(ctx.out()); + auto buf = memory_buffer(); + write(std::back_inserter(buf)); + auto specs = format_specs<>(); + specs.width = width_; + specs.fill = fill_; + specs.align = align_; + return detail::write(ctx.out(), string_view(buf.data(), buf.size()), specs); + } + + auto nested(const T& value) const -> nested_view { + return nested_view{&formatter_, &value}; + } +}; + +// DEPRECATED! join_view will be moved to ranges.h. +template +struct join_view : detail::view { + It begin; + Sentinel end; + basic_string_view sep; + + join_view(It b, Sentinel e, basic_string_view s) + : begin(b), end(e), sep(s) {} +}; + +template +struct formatter, Char> { + private: + using value_type = +#ifdef __cpp_lib_ranges + std::iter_value_t; +#else + typename std::iterator_traits::value_type; +#endif + formatter, Char> value_formatter_; + + public: + template + FMT_CONSTEXPR auto parse(ParseContext& ctx) -> const Char* { + return value_formatter_.parse(ctx); + } + + template + auto format(const join_view& value, + FormatContext& ctx) const -> decltype(ctx.out()) { + auto it = value.begin; + auto out = ctx.out(); + if (it != value.end) { + out = value_formatter_.format(*it, ctx); + ++it; + while (it != value.end) { + out = detail::copy_str(value.sep.begin(), value.sep.end(), out); + ctx.advance_to(out); + out = value_formatter_.format(*it, ctx); + ++it; + } + } + return out; + } +}; + +/** + Returns a view that formats the iterator range `[begin, end)` with elements + separated by `sep`. + */ +template +auto join(It begin, Sentinel end, string_view sep) -> join_view { + return {begin, end, sep}; +} + +/** + \rst + Returns a view that formats `range` with elements separated by `sep`. + + **Example**:: + + std::vector v = {1, 2, 3}; + fmt::print("{}", fmt::join(v, ", ")); + // Output: "1, 2, 3" + + ``fmt::join`` applies passed format specifiers to the range elements:: + + fmt::print("{:02}", fmt::join(v, ", ")); + // Output: "01, 02, 03" + \endrst + */ +template +auto join(Range&& range, string_view sep) + -> join_view, detail::sentinel_t> { + return join(std::begin(range), std::end(range), sep); +} + +/** + \rst + Converts *value* to ``std::string`` using the default format for type *T*. + + **Example**:: + + #include + + std::string answer = fmt::to_string(42); + \endrst + */ +template ::value && + !detail::has_format_as::value)> +inline auto to_string(const T& value) -> std::string { + auto buffer = memory_buffer(); + detail::write(appender(buffer), value); + return {buffer.data(), buffer.size()}; +} + +template ::value)> +FMT_NODISCARD inline auto to_string(T value) -> std::string { + // The buffer should be large enough to store the number including the sign + // or "false" for bool. + constexpr int max_size = detail::digits10() + 2; + char buffer[max_size > 5 ? static_cast(max_size) : 5]; + char* begin = buffer; + return std::string(begin, detail::write(begin, value)); +} + +template +FMT_NODISCARD auto to_string(const basic_memory_buffer& buf) + -> std::basic_string { + auto size = buf.size(); + detail::assume(size < std::basic_string().max_size()); + return std::basic_string(buf.data(), size); +} + +template ::value && + detail::has_format_as::value)> +inline auto to_string(const T& value) -> std::string { + return to_string(format_as(value)); +} + +FMT_END_EXPORT + +namespace detail { + +template +void vformat_to(buffer& buf, basic_string_view fmt, + typename vformat_args::type args, locale_ref loc) { + auto out = buffer_appender(buf); + if (fmt.size() == 2 && equal2(fmt.data(), "{}")) { + auto arg = args.get(0); + if (!arg) throw_format_error("argument not found"); + visit_format_arg(default_arg_formatter{out, args, loc}, arg); + return; + } + + struct format_handler : error_handler { + basic_format_parse_context parse_context; + buffer_context context; + + format_handler(buffer_appender p_out, basic_string_view str, + basic_format_args> p_args, + locale_ref p_loc) + : parse_context(str), context(p_out, p_args, p_loc) {} + + void on_text(const Char* begin, const Char* end) { + auto text = basic_string_view(begin, to_unsigned(end - begin)); + context.advance_to(write(context.out(), text)); + } + + FMT_CONSTEXPR auto on_arg_id() -> int { + return parse_context.next_arg_id(); + } + FMT_CONSTEXPR auto on_arg_id(int id) -> int { + return parse_context.check_arg_id(id), id; + } + FMT_CONSTEXPR auto on_arg_id(basic_string_view id) -> int { + int arg_id = context.arg_id(id); + if (arg_id < 0) throw_format_error("argument not found"); + return arg_id; + } + + FMT_INLINE void on_replacement_field(int id, const Char*) { + auto arg = get_arg(context, id); + context.advance_to(visit_format_arg( + default_arg_formatter{context.out(), context.args(), + context.locale()}, + arg)); + } + + auto on_format_specs(int id, const Char* begin, const Char* end) + -> const Char* { + auto arg = get_arg(context, id); + // Not using a visitor for custom types gives better codegen. + if (arg.format_custom(begin, parse_context, context)) + return parse_context.begin(); + auto specs = detail::dynamic_format_specs(); + begin = parse_format_specs(begin, end, specs, parse_context, arg.type()); + detail::handle_dynamic_spec( + specs.width, specs.width_ref, context); + detail::handle_dynamic_spec( + specs.precision, specs.precision_ref, context); + if (begin == end || *begin != '}') + throw_format_error("missing '}' in format string"); + auto f = arg_formatter{context.out(), specs, context.locale()}; + context.advance_to(visit_format_arg(f, arg)); + return begin; + } + }; + detail::parse_format_string(fmt, format_handler(out, fmt, args, loc)); +} + +FMT_BEGIN_EXPORT + +#ifndef FMT_HEADER_ONLY +extern template FMT_API void vformat_to(buffer&, string_view, + typename vformat_args<>::type, + locale_ref); +extern template FMT_API auto thousands_sep_impl(locale_ref) + -> thousands_sep_result; +extern template FMT_API auto thousands_sep_impl(locale_ref) + -> thousands_sep_result; +extern template FMT_API auto decimal_point_impl(locale_ref) -> char; +extern template FMT_API auto decimal_point_impl(locale_ref) -> wchar_t; +#endif // FMT_HEADER_ONLY + +} // namespace detail + +#if FMT_USE_USER_DEFINED_LITERALS +inline namespace literals { +/** + \rst + User-defined literal equivalent of :func:`fmt::arg`. + + **Example**:: + + using namespace fmt::literals; + fmt::print("Elapsed time: {s:.2f} seconds", "s"_a=1.23); + \endrst + */ +# if FMT_USE_NONTYPE_TEMPLATE_ARGS +template constexpr auto operator""_a() { + using char_t = remove_cvref_t; + return detail::udl_arg(); +} +# else +constexpr auto operator""_a(const char* s, size_t) -> detail::udl_arg { + return {s}; +} +# endif +} // namespace literals +#endif // FMT_USE_USER_DEFINED_LITERALS + +template ::value)> +inline auto vformat(const Locale& loc, string_view fmt, format_args args) + -> std::string { + return detail::vformat(loc, fmt, args); +} + +template ::value)> +inline auto format(const Locale& loc, format_string fmt, T&&... args) + -> std::string { + return fmt::vformat(loc, string_view(fmt), fmt::make_format_args(args...)); +} + +template ::value&& + detail::is_locale::value)> +auto vformat_to(OutputIt out, const Locale& loc, string_view fmt, + format_args args) -> OutputIt { + using detail::get_buffer; + auto&& buf = get_buffer(out); + detail::vformat_to(buf, fmt, args, detail::locale_ref(loc)); + return detail::get_iterator(buf, out); +} + +template ::value&& + detail::is_locale::value)> +FMT_INLINE auto format_to(OutputIt out, const Locale& loc, + format_string fmt, T&&... args) -> OutputIt { + return vformat_to(out, loc, fmt, fmt::make_format_args(args...)); +} + +template ::value)> +FMT_NODISCARD FMT_INLINE auto formatted_size(const Locale& loc, + format_string fmt, + T&&... args) -> size_t { + auto buf = detail::counting_buffer<>(); + detail::vformat_to(buf, fmt, fmt::make_format_args(args...), + detail::locale_ref(loc)); + return buf.count(); +} + +FMT_END_EXPORT + +template +template +FMT_CONSTEXPR FMT_INLINE auto +formatter::value != + detail::type::custom_type>>::format(const T& val, + FormatContext& ctx) + const -> decltype(ctx.out()) { + if (specs_.width_ref.kind == detail::arg_id_kind::none && + specs_.precision_ref.kind == detail::arg_id_kind::none) { + return detail::write(ctx.out(), val, specs_, ctx.locale()); + } + auto specs = specs_; + detail::handle_dynamic_spec(specs.width, + specs.width_ref, ctx); + detail::handle_dynamic_spec( + specs.precision, specs.precision_ref, ctx); + return detail::write(ctx.out(), val, specs, ctx.locale()); +} + +FMT_END_NAMESPACE + +#ifdef FMT_HEADER_ONLY +# define FMT_FUNC inline +# include "format-inl.h" +#else +# define FMT_FUNC +#endif + +#endif // FMT_FORMAT_H_ diff --git a/c/vendor/fmt/include/fmt/os.h b/c/vendor/fmt/include/fmt/os.h new file mode 100644 index 0000000000..3c7b3ccb48 --- /dev/null +++ b/c/vendor/fmt/include/fmt/os.h @@ -0,0 +1,455 @@ +// Formatting library for C++ - optional OS-specific functionality +// +// Copyright (c) 2012 - present, Victor Zverovich +// All rights reserved. +// +// For the license information refer to format.h. + +#ifndef FMT_OS_H_ +#define FMT_OS_H_ + +#include +#include +#include +#include // std::system_error + +#include "format.h" + +#if defined __APPLE__ || defined(__FreeBSD__) +# if FMT_HAS_INCLUDE() +# include // for LC_NUMERIC_MASK on OS X +# endif +#endif + +#ifndef FMT_USE_FCNTL +// UWP doesn't provide _pipe. +# if FMT_HAS_INCLUDE("winapifamily.h") +# include +# endif +# if (FMT_HAS_INCLUDE() || defined(__APPLE__) || \ + defined(__linux__)) && \ + (!defined(WINAPI_FAMILY) || \ + (WINAPI_FAMILY == WINAPI_FAMILY_DESKTOP_APP)) +# include // for O_RDONLY +# define FMT_USE_FCNTL 1 +# else +# define FMT_USE_FCNTL 0 +# endif +#endif + +#ifndef FMT_POSIX +# if defined(_WIN32) && !defined(__MINGW32__) +// Fix warnings about deprecated symbols. +# define FMT_POSIX(call) _##call +# else +# define FMT_POSIX(call) call +# endif +#endif + +// Calls to system functions are wrapped in FMT_SYSTEM for testability. +#ifdef FMT_SYSTEM +# define FMT_HAS_SYSTEM +# define FMT_POSIX_CALL(call) FMT_SYSTEM(call) +#else +# define FMT_SYSTEM(call) ::call +# ifdef _WIN32 +// Fix warnings about deprecated symbols. +# define FMT_POSIX_CALL(call) ::_##call +# else +# define FMT_POSIX_CALL(call) ::call +# endif +#endif + +// Retries the expression while it evaluates to error_result and errno +// equals to EINTR. +#ifndef _WIN32 +# define FMT_RETRY_VAL(result, expression, error_result) \ + do { \ + (result) = (expression); \ + } while ((result) == (error_result) && errno == EINTR) +#else +# define FMT_RETRY_VAL(result, expression, error_result) result = (expression) +#endif + +#define FMT_RETRY(result, expression) FMT_RETRY_VAL(result, expression, -1) + +FMT_BEGIN_NAMESPACE +FMT_BEGIN_EXPORT + +/** + \rst + A reference to a null-terminated string. It can be constructed from a C + string or ``std::string``. + + You can use one of the following type aliases for common character types: + + +---------------+-----------------------------+ + | Type | Definition | + +===============+=============================+ + | cstring_view | basic_cstring_view | + +---------------+-----------------------------+ + | wcstring_view | basic_cstring_view | + +---------------+-----------------------------+ + + This class is most useful as a parameter type to allow passing + different types of strings to a function, for example:: + + template + std::string format(cstring_view format_str, const Args & ... args); + + format("{}", 42); + format(std::string("{}"), 42); + \endrst + */ +template class basic_cstring_view { + private: + const Char* data_; + + public: + /** Constructs a string reference object from a C string. */ + basic_cstring_view(const Char* s) : data_(s) {} + + /** + \rst + Constructs a string reference from an ``std::string`` object. + \endrst + */ + basic_cstring_view(const std::basic_string& s) : data_(s.c_str()) {} + + /** Returns the pointer to a C string. */ + auto c_str() const -> const Char* { return data_; } +}; + +using cstring_view = basic_cstring_view; +using wcstring_view = basic_cstring_view; + +#ifdef _WIN32 +FMT_API const std::error_category& system_category() noexcept; + +namespace detail { +FMT_API void format_windows_error(buffer& out, int error_code, + const char* message) noexcept; +} + +FMT_API std::system_error vwindows_error(int error_code, string_view format_str, + format_args args); + +/** + \rst + Constructs a :class:`std::system_error` object with the description + of the form + + .. parsed-literal:: + **: ** + + where ** is the formatted message and ** is the + system message corresponding to the error code. + *error_code* is a Windows error code as given by ``GetLastError``. + If *error_code* is not a valid error code such as -1, the system message + will look like "error -1". + + **Example**:: + + // This throws a system_error with the description + // cannot open file 'madeup': The system cannot find the file specified. + // or similar (system message may vary). + const char *filename = "madeup"; + LPOFSTRUCT of = LPOFSTRUCT(); + HFILE file = OpenFile(filename, &of, OF_READ); + if (file == HFILE_ERROR) { + throw fmt::windows_error(GetLastError(), + "cannot open file '{}'", filename); + } + \endrst +*/ +template +std::system_error windows_error(int error_code, string_view message, + const Args&... args) { + return vwindows_error(error_code, message, fmt::make_format_args(args...)); +} + +// Reports a Windows error without throwing an exception. +// Can be used to report errors from destructors. +FMT_API void report_windows_error(int error_code, const char* message) noexcept; +#else +inline auto system_category() noexcept -> const std::error_category& { + return std::system_category(); +} +#endif // _WIN32 + +// std::system is not available on some platforms such as iOS (#2248). +#ifdef __OSX__ +template > +void say(const S& format_str, Args&&... args) { + std::system(format("say \"{}\"", format(format_str, args...)).c_str()); +} +#endif + +// A buffered file. +class buffered_file { + private: + FILE* file_; + + friend class file; + + explicit buffered_file(FILE* f) : file_(f) {} + + public: + buffered_file(const buffered_file&) = delete; + void operator=(const buffered_file&) = delete; + + // Constructs a buffered_file object which doesn't represent any file. + buffered_file() noexcept : file_(nullptr) {} + + // Destroys the object closing the file it represents if any. + FMT_API ~buffered_file() noexcept; + + public: + buffered_file(buffered_file&& other) noexcept : file_(other.file_) { + other.file_ = nullptr; + } + + auto operator=(buffered_file&& other) -> buffered_file& { + close(); + file_ = other.file_; + other.file_ = nullptr; + return *this; + } + + // Opens a file. + FMT_API buffered_file(cstring_view filename, cstring_view mode); + + // Closes the file. + FMT_API void close(); + + // Returns the pointer to a FILE object representing this file. + auto get() const noexcept -> FILE* { return file_; } + + FMT_API auto descriptor() const -> int; + + void vprint(string_view format_str, format_args args) { + fmt::vprint(file_, format_str, args); + } + + template + inline void print(string_view format_str, const Args&... args) { + vprint(format_str, fmt::make_format_args(args...)); + } +}; + +#if FMT_USE_FCNTL +// A file. Closed file is represented by a file object with descriptor -1. +// Methods that are not declared with noexcept may throw +// fmt::system_error in case of failure. Note that some errors such as +// closing the file multiple times will cause a crash on Windows rather +// than an exception. You can get standard behavior by overriding the +// invalid parameter handler with _set_invalid_parameter_handler. +class FMT_API file { + private: + int fd_; // File descriptor. + + // Constructs a file object with a given descriptor. + explicit file(int fd) : fd_(fd) {} + + public: + // Possible values for the oflag argument to the constructor. + enum { + RDONLY = FMT_POSIX(O_RDONLY), // Open for reading only. + WRONLY = FMT_POSIX(O_WRONLY), // Open for writing only. + RDWR = FMT_POSIX(O_RDWR), // Open for reading and writing. + CREATE = FMT_POSIX(O_CREAT), // Create if the file doesn't exist. + APPEND = FMT_POSIX(O_APPEND), // Open in append mode. + TRUNC = FMT_POSIX(O_TRUNC) // Truncate the content of the file. + }; + + // Constructs a file object which doesn't represent any file. + file() noexcept : fd_(-1) {} + + // Opens a file and constructs a file object representing this file. + file(cstring_view path, int oflag); + + public: + file(const file&) = delete; + void operator=(const file&) = delete; + + file(file&& other) noexcept : fd_(other.fd_) { other.fd_ = -1; } + + // Move assignment is not noexcept because close may throw. + auto operator=(file&& other) -> file& { + close(); + fd_ = other.fd_; + other.fd_ = -1; + return *this; + } + + // Destroys the object closing the file it represents if any. + ~file() noexcept; + + // Returns the file descriptor. + auto descriptor() const noexcept -> int { return fd_; } + + // Closes the file. + void close(); + + // Returns the file size. The size has signed type for consistency with + // stat::st_size. + auto size() const -> long long; + + // Attempts to read count bytes from the file into the specified buffer. + auto read(void* buffer, size_t count) -> size_t; + + // Attempts to write count bytes from the specified buffer to the file. + auto write(const void* buffer, size_t count) -> size_t; + + // Duplicates a file descriptor with the dup function and returns + // the duplicate as a file object. + static auto dup(int fd) -> file; + + // Makes fd be the copy of this file descriptor, closing fd first if + // necessary. + void dup2(int fd); + + // Makes fd be the copy of this file descriptor, closing fd first if + // necessary. + void dup2(int fd, std::error_code& ec) noexcept; + + // Creates a pipe setting up read_end and write_end file objects for reading + // and writing respectively. + // DEPRECATED! Taking files as out parameters is deprecated. + static void pipe(file& read_end, file& write_end); + + // Creates a buffered_file object associated with this file and detaches + // this file object from the file. + auto fdopen(const char* mode) -> buffered_file; + +# if defined(_WIN32) && !defined(__MINGW32__) + // Opens a file and constructs a file object representing this file by + // wcstring_view filename. Windows only. + static file open_windows_file(wcstring_view path, int oflag); +# endif +}; + +// Returns the memory page size. +auto getpagesize() -> long; + +namespace detail { + +struct buffer_size { + buffer_size() = default; + size_t value = 0; + auto operator=(size_t val) const -> buffer_size { + auto bs = buffer_size(); + bs.value = val; + return bs; + } +}; + +struct ostream_params { + int oflag = file::WRONLY | file::CREATE | file::TRUNC; + size_t buffer_size = BUFSIZ > 32768 ? BUFSIZ : 32768; + + ostream_params() {} + + template + ostream_params(T... params, int new_oflag) : ostream_params(params...) { + oflag = new_oflag; + } + + template + ostream_params(T... params, detail::buffer_size bs) + : ostream_params(params...) { + this->buffer_size = bs.value; + } + +// Intel has a bug that results in failure to deduce a constructor +// for empty parameter packs. +# if defined(__INTEL_COMPILER) && __INTEL_COMPILER < 2000 + ostream_params(int new_oflag) : oflag(new_oflag) {} + ostream_params(detail::buffer_size bs) : buffer_size(bs.value) {} +# endif +}; + +class file_buffer final : public buffer { + file file_; + + FMT_API void grow(size_t) override; + + public: + FMT_API file_buffer(cstring_view path, const ostream_params& params); + FMT_API file_buffer(file_buffer&& other); + FMT_API ~file_buffer(); + + void flush() { + if (size() == 0) return; + file_.write(data(), size() * sizeof(data()[0])); + clear(); + } + + void close() { + flush(); + file_.close(); + } +}; + +} // namespace detail + +// Added {} below to work around default constructor error known to +// occur in Xcode versions 7.2.1 and 8.2.1. +constexpr detail::buffer_size buffer_size{}; + +/** A fast output stream which is not thread-safe. */ +class FMT_API ostream { + private: + FMT_MSC_WARNING(suppress : 4251) + detail::file_buffer buffer_; + + ostream(cstring_view path, const detail::ostream_params& params) + : buffer_(path, params) {} + + public: + ostream(ostream&& other) : buffer_(std::move(other.buffer_)) {} + + ~ostream(); + + void flush() { buffer_.flush(); } + + template + friend auto output_file(cstring_view path, T... params) -> ostream; + + void close() { buffer_.close(); } + + /** + Formats ``args`` according to specifications in ``fmt`` and writes the + output to the file. + */ + template void print(format_string fmt, T&&... args) { + vformat_to(std::back_inserter(buffer_), fmt, + fmt::make_format_args(args...)); + } +}; + +/** + \rst + Opens a file for writing. Supported parameters passed in *params*: + + * ````: Flags passed to `open + `_ + (``file::WRONLY | file::CREATE | file::TRUNC`` by default) + * ``buffer_size=``: Output buffer size + + **Example**:: + + auto out = fmt::output_file("guide.txt"); + out.print("Don't {}", "Panic"); + \endrst + */ +template +inline auto output_file(cstring_view path, T... params) -> ostream { + return {path, detail::ostream_params(params...)}; +} +#endif // FMT_USE_FCNTL + +FMT_END_EXPORT +FMT_END_NAMESPACE + +#endif // FMT_OS_H_ diff --git a/c/vendor/fmt/include/fmt/ostream.h b/c/vendor/fmt/include/fmt/ostream.h new file mode 100644 index 0000000000..26fb3b5ac0 --- /dev/null +++ b/c/vendor/fmt/include/fmt/ostream.h @@ -0,0 +1,245 @@ +// Formatting library for C++ - std::ostream support +// +// Copyright (c) 2012 - present, Victor Zverovich +// All rights reserved. +// +// For the license information refer to format.h. + +#ifndef FMT_OSTREAM_H_ +#define FMT_OSTREAM_H_ + +#include // std::filebuf + +#ifdef _WIN32 +# ifdef __GLIBCXX__ +# include +# include +# endif +# include +#endif + +#include "format.h" + +FMT_BEGIN_NAMESPACE +namespace detail { + +template class formatbuf : public Streambuf { + private: + using char_type = typename Streambuf::char_type; + using streamsize = decltype(std::declval().sputn(nullptr, 0)); + using int_type = typename Streambuf::int_type; + using traits_type = typename Streambuf::traits_type; + + buffer& buffer_; + + public: + explicit formatbuf(buffer& buf) : buffer_(buf) {} + + protected: + // The put area is always empty. This makes the implementation simpler and has + // the advantage that the streambuf and the buffer are always in sync and + // sputc never writes into uninitialized memory. A disadvantage is that each + // call to sputc always results in a (virtual) call to overflow. There is no + // disadvantage here for sputn since this always results in a call to xsputn. + + auto overflow(int_type ch) -> int_type override { + if (!traits_type::eq_int_type(ch, traits_type::eof())) + buffer_.push_back(static_cast(ch)); + return ch; + } + + auto xsputn(const char_type* s, streamsize count) -> streamsize override { + buffer_.append(s, s + count); + return count; + } +}; + +// Generate a unique explicit instantion in every translation unit using a tag +// type in an anonymous namespace. +namespace { +struct file_access_tag {}; +} // namespace +template +class file_access { + friend auto get_file(BufType& obj) -> FILE* { return obj.*FileMemberPtr; } +}; + +#if FMT_MSC_VERSION +template class file_access; +auto get_file(std::filebuf&) -> FILE*; +#endif + +inline auto write_ostream_unicode(std::ostream& os, fmt::string_view data) + -> bool { + FILE* f = nullptr; +#if FMT_MSC_VERSION + if (auto* buf = dynamic_cast(os.rdbuf())) + f = get_file(*buf); + else + return false; +#elif defined(_WIN32) && defined(__GLIBCXX__) + auto* rdbuf = os.rdbuf(); + if (auto* sfbuf = dynamic_cast<__gnu_cxx::stdio_sync_filebuf*>(rdbuf)) + f = sfbuf->file(); + else if (auto* fbuf = dynamic_cast<__gnu_cxx::stdio_filebuf*>(rdbuf)) + f = fbuf->file(); + else + return false; +#else + ignore_unused(os, data, f); +#endif +#ifdef _WIN32 + if (f) { + int fd = _fileno(f); + if (_isatty(fd)) { + os.flush(); + return write_console(fd, data); + } + } +#endif + return false; +} +inline auto write_ostream_unicode(std::wostream&, + fmt::basic_string_view) -> bool { + return false; +} + +// Write the content of buf to os. +// It is a separate function rather than a part of vprint to simplify testing. +template +void write_buffer(std::basic_ostream& os, buffer& buf) { + const Char* buf_data = buf.data(); + using unsigned_streamsize = std::make_unsigned::type; + unsigned_streamsize size = buf.size(); + unsigned_streamsize max_size = to_unsigned(max_value()); + do { + unsigned_streamsize n = size <= max_size ? size : max_size; + os.write(buf_data, static_cast(n)); + buf_data += n; + size -= n; + } while (size != 0); +} + +template +void format_value(buffer& buf, const T& value) { + auto&& format_buf = formatbuf>(buf); + auto&& output = std::basic_ostream(&format_buf); +#if !defined(FMT_STATIC_THOUSANDS_SEPARATOR) + output.imbue(std::locale::classic()); // The default is always unlocalized. +#endif + output << value; + output.exceptions(std::ios_base::failbit | std::ios_base::badbit); +} + +template struct streamed_view { + const T& value; +}; + +} // namespace detail + +// Formats an object of type T that has an overloaded ostream operator<<. +template +struct basic_ostream_formatter : formatter, Char> { + void set_debug_format() = delete; + + template + auto format(const T& value, basic_format_context& ctx) const + -> OutputIt { + auto buffer = basic_memory_buffer(); + detail::format_value(buffer, value); + return formatter, Char>::format( + {buffer.data(), buffer.size()}, ctx); + } +}; + +using ostream_formatter = basic_ostream_formatter; + +template +struct formatter, Char> + : basic_ostream_formatter { + template + auto format(detail::streamed_view view, + basic_format_context& ctx) const -> OutputIt { + return basic_ostream_formatter::format(view.value, ctx); + } +}; + +/** + \rst + Returns a view that formats `value` via an ostream ``operator<<``. + + **Example**:: + + fmt::print("Current thread id: {}\n", + fmt::streamed(std::this_thread::get_id())); + \endrst + */ +template +constexpr auto streamed(const T& value) -> detail::streamed_view { + return {value}; +} + +namespace detail { + +inline void vprint_directly(std::ostream& os, string_view format_str, + format_args args) { + auto buffer = memory_buffer(); + detail::vformat_to(buffer, format_str, args); + detail::write_buffer(os, buffer); +} + +} // namespace detail + +FMT_EXPORT template +void vprint(std::basic_ostream& os, + basic_string_view> format_str, + basic_format_args>> args) { + auto buffer = basic_memory_buffer(); + detail::vformat_to(buffer, format_str, args); + if (detail::write_ostream_unicode(os, {buffer.data(), buffer.size()})) return; + detail::write_buffer(os, buffer); +} + +/** + \rst + Prints formatted data to the stream *os*. + + **Example**:: + + fmt::print(cerr, "Don't {}!", "panic"); + \endrst + */ +FMT_EXPORT template +void print(std::ostream& os, format_string fmt, T&&... args) { + const auto& vargs = fmt::make_format_args(args...); + if (detail::is_utf8()) + vprint(os, fmt, vargs); + else + detail::vprint_directly(os, fmt, vargs); +} + +FMT_EXPORT +template +void print(std::wostream& os, + basic_format_string...> fmt, + Args&&... args) { + vprint(os, fmt, fmt::make_format_args>(args...)); +} + +FMT_EXPORT template +void println(std::ostream& os, format_string fmt, T&&... args) { + fmt::print(os, "{}\n", fmt::format(fmt, std::forward(args)...)); +} + +FMT_EXPORT +template +void println(std::wostream& os, + basic_format_string...> fmt, + Args&&... args) { + print(os, L"{}\n", fmt::format(fmt, std::forward(args)...)); +} + +FMT_END_NAMESPACE + +#endif // FMT_OSTREAM_H_ diff --git a/c/vendor/fmt/include/fmt/printf.h b/c/vendor/fmt/include/fmt/printf.h new file mode 100644 index 0000000000..07e81577cf --- /dev/null +++ b/c/vendor/fmt/include/fmt/printf.h @@ -0,0 +1,675 @@ +// Formatting library for C++ - legacy printf implementation +// +// Copyright (c) 2012 - 2016, Victor Zverovich +// All rights reserved. +// +// For the license information refer to format.h. + +#ifndef FMT_PRINTF_H_ +#define FMT_PRINTF_H_ + +#include // std::max +#include // std::numeric_limits + +#include "format.h" + +FMT_BEGIN_NAMESPACE +FMT_BEGIN_EXPORT + +template struct printf_formatter { + printf_formatter() = delete; +}; + +template class basic_printf_context { + private: + detail::buffer_appender out_; + basic_format_args args_; + + static_assert(std::is_same::value || + std::is_same::value, + "Unsupported code unit type."); + + public: + using char_type = Char; + using parse_context_type = basic_format_parse_context; + template using formatter_type = printf_formatter; + + /** + \rst + Constructs a ``printf_context`` object. References to the arguments are + stored in the context object so make sure they have appropriate lifetimes. + \endrst + */ + basic_printf_context(detail::buffer_appender out, + basic_format_args args) + : out_(out), args_(args) {} + + auto out() -> detail::buffer_appender { return out_; } + void advance_to(detail::buffer_appender) {} + + auto locale() -> detail::locale_ref { return {}; } + + auto arg(int id) const -> basic_format_arg { + return args_.get(id); + } + + FMT_CONSTEXPR void on_error(const char* message) { + detail::error_handler().on_error(message); + } +}; + +namespace detail { + +// Checks if a value fits in int - used to avoid warnings about comparing +// signed and unsigned integers. +template struct int_checker { + template static auto fits_in_int(T value) -> bool { + unsigned max = max_value(); + return value <= max; + } + static auto fits_in_int(bool) -> bool { return true; } +}; + +template <> struct int_checker { + template static auto fits_in_int(T value) -> bool { + return value >= (std::numeric_limits::min)() && + value <= max_value(); + } + static auto fits_in_int(int) -> bool { return true; } +}; + +struct printf_precision_handler { + template ::value)> + auto operator()(T value) -> int { + if (!int_checker::is_signed>::fits_in_int(value)) + throw_format_error("number is too big"); + return (std::max)(static_cast(value), 0); + } + + template ::value)> + auto operator()(T) -> int { + throw_format_error("precision is not integer"); + return 0; + } +}; + +// An argument visitor that returns true iff arg is a zero integer. +struct is_zero_int { + template ::value)> + auto operator()(T value) -> bool { + return value == 0; + } + + template ::value)> + auto operator()(T) -> bool { + return false; + } +}; + +template struct make_unsigned_or_bool : std::make_unsigned {}; + +template <> struct make_unsigned_or_bool { + using type = bool; +}; + +template class arg_converter { + private: + using char_type = typename Context::char_type; + + basic_format_arg& arg_; + char_type type_; + + public: + arg_converter(basic_format_arg& arg, char_type type) + : arg_(arg), type_(type) {} + + void operator()(bool value) { + if (type_ != 's') operator()(value); + } + + template ::value)> + void operator()(U value) { + bool is_signed = type_ == 'd' || type_ == 'i'; + using target_type = conditional_t::value, U, T>; + if (const_check(sizeof(target_type) <= sizeof(int))) { + // Extra casts are used to silence warnings. + if (is_signed) { + auto n = static_cast(static_cast(value)); + arg_ = detail::make_arg(n); + } else { + using unsigned_type = typename make_unsigned_or_bool::type; + auto n = static_cast(static_cast(value)); + arg_ = detail::make_arg(n); + } + } else { + if (is_signed) { + // glibc's printf doesn't sign extend arguments of smaller types: + // std::printf("%lld", -42); // prints "4294967254" + // but we don't have to do the same because it's a UB. + auto n = static_cast(value); + arg_ = detail::make_arg(n); + } else { + auto n = static_cast::type>(value); + arg_ = detail::make_arg(n); + } + } + } + + template ::value)> + void operator()(U) {} // No conversion needed for non-integral types. +}; + +// Converts an integer argument to T for printf, if T is an integral type. +// If T is void, the argument is converted to corresponding signed or unsigned +// type depending on the type specifier: 'd' and 'i' - signed, other - +// unsigned). +template +void convert_arg(basic_format_arg& arg, Char type) { + visit_format_arg(arg_converter(arg, type), arg); +} + +// Converts an integer argument to char for printf. +template class char_converter { + private: + basic_format_arg& arg_; + + public: + explicit char_converter(basic_format_arg& arg) : arg_(arg) {} + + template ::value)> + void operator()(T value) { + auto c = static_cast(value); + arg_ = detail::make_arg(c); + } + + template ::value)> + void operator()(T) {} // No conversion needed for non-integral types. +}; + +// An argument visitor that return a pointer to a C string if argument is a +// string or null otherwise. +template struct get_cstring { + template auto operator()(T) -> const Char* { return nullptr; } + auto operator()(const Char* s) -> const Char* { return s; } +}; + +// Checks if an argument is a valid printf width specifier and sets +// left alignment if it is negative. +template class printf_width_handler { + private: + format_specs& specs_; + + public: + explicit printf_width_handler(format_specs& specs) : specs_(specs) {} + + template ::value)> + auto operator()(T value) -> unsigned { + auto width = static_cast>(value); + if (detail::is_negative(value)) { + specs_.align = align::left; + width = 0 - width; + } + unsigned int_max = max_value(); + if (width > int_max) throw_format_error("number is too big"); + return static_cast(width); + } + + template ::value)> + auto operator()(T) -> unsigned { + throw_format_error("width is not integer"); + return 0; + } +}; + +// Workaround for a bug with the XL compiler when initializing +// printf_arg_formatter's base class. +template +auto make_arg_formatter(buffer_appender iter, format_specs& s) + -> arg_formatter { + return {iter, s, locale_ref()}; +} + +// The ``printf`` argument formatter. +template +class printf_arg_formatter : public arg_formatter { + private: + using base = arg_formatter; + using context_type = basic_printf_context; + + context_type& context_; + + void write_null_pointer(bool is_string = false) { + auto s = this->specs; + s.type = presentation_type::none; + write_bytes(this->out, is_string ? "(null)" : "(nil)", s); + } + + public: + printf_arg_formatter(buffer_appender iter, format_specs& s, + context_type& ctx) + : base(make_arg_formatter(iter, s)), context_(ctx) {} + + void operator()(monostate value) { base::operator()(value); } + + template ::value)> + void operator()(T value) { + // MSVC2013 fails to compile separate overloads for bool and Char so use + // std::is_same instead. + if (!std::is_same::value) { + base::operator()(value); + return; + } + format_specs fmt_specs = this->specs; + if (fmt_specs.type != presentation_type::none && + fmt_specs.type != presentation_type::chr) { + return (*this)(static_cast(value)); + } + fmt_specs.sign = sign::none; + fmt_specs.alt = false; + fmt_specs.fill[0] = ' '; // Ignore '0' flag for char types. + // align::numeric needs to be overwritten here since the '0' flag is + // ignored for non-numeric types + if (fmt_specs.align == align::none || fmt_specs.align == align::numeric) + fmt_specs.align = align::right; + write(this->out, static_cast(value), fmt_specs); + } + + template ::value)> + void operator()(T value) { + base::operator()(value); + } + + /** Formats a null-terminated C string. */ + void operator()(const char* value) { + if (value) + base::operator()(value); + else + write_null_pointer(this->specs.type != presentation_type::pointer); + } + + /** Formats a null-terminated wide C string. */ + void operator()(const wchar_t* value) { + if (value) + base::operator()(value); + else + write_null_pointer(this->specs.type != presentation_type::pointer); + } + + void operator()(basic_string_view value) { base::operator()(value); } + + /** Formats a pointer. */ + void operator()(const void* value) { + if (value) + base::operator()(value); + else + write_null_pointer(); + } + + /** Formats an argument of a custom (user-defined) type. */ + void operator()(typename basic_format_arg::handle handle) { + auto parse_ctx = basic_format_parse_context({}); + handle.format(parse_ctx, context_); + } +}; + +template +void parse_flags(format_specs& specs, const Char*& it, const Char* end) { + for (; it != end; ++it) { + switch (*it) { + case '-': + specs.align = align::left; + break; + case '+': + specs.sign = sign::plus; + break; + case '0': + specs.fill[0] = '0'; + break; + case ' ': + if (specs.sign != sign::plus) specs.sign = sign::space; + break; + case '#': + specs.alt = true; + break; + default: + return; + } + } +} + +template +auto parse_header(const Char*& it, const Char* end, format_specs& specs, + GetArg get_arg) -> int { + int arg_index = -1; + Char c = *it; + if (c >= '0' && c <= '9') { + // Parse an argument index (if followed by '$') or a width possibly + // preceded with '0' flag(s). + int value = parse_nonnegative_int(it, end, -1); + if (it != end && *it == '$') { // value is an argument index + ++it; + arg_index = value != -1 ? value : max_value(); + } else { + if (c == '0') specs.fill[0] = '0'; + if (value != 0) { + // Nonzero value means that we parsed width and don't need to + // parse it or flags again, so return now. + if (value == -1) throw_format_error("number is too big"); + specs.width = value; + return arg_index; + } + } + } + parse_flags(specs, it, end); + // Parse width. + if (it != end) { + if (*it >= '0' && *it <= '9') { + specs.width = parse_nonnegative_int(it, end, -1); + if (specs.width == -1) throw_format_error("number is too big"); + } else if (*it == '*') { + ++it; + specs.width = static_cast(visit_format_arg( + detail::printf_width_handler(specs), get_arg(-1))); + } + } + return arg_index; +} + +inline auto parse_printf_presentation_type(char c, type t) + -> presentation_type { + using pt = presentation_type; + constexpr auto integral_set = sint_set | uint_set | bool_set | char_set; + switch (c) { + case 'd': + return in(t, integral_set) ? pt::dec : pt::none; + case 'o': + return in(t, integral_set) ? pt::oct : pt::none; + case 'x': + return in(t, integral_set) ? pt::hex_lower : pt::none; + case 'X': + return in(t, integral_set) ? pt::hex_upper : pt::none; + case 'a': + return in(t, float_set) ? pt::hexfloat_lower : pt::none; + case 'A': + return in(t, float_set) ? pt::hexfloat_upper : pt::none; + case 'e': + return in(t, float_set) ? pt::exp_lower : pt::none; + case 'E': + return in(t, float_set) ? pt::exp_upper : pt::none; + case 'f': + return in(t, float_set) ? pt::fixed_lower : pt::none; + case 'F': + return in(t, float_set) ? pt::fixed_upper : pt::none; + case 'g': + return in(t, float_set) ? pt::general_lower : pt::none; + case 'G': + return in(t, float_set) ? pt::general_upper : pt::none; + case 'c': + return in(t, integral_set) ? pt::chr : pt::none; + case 's': + return in(t, string_set | cstring_set) ? pt::string : pt::none; + case 'p': + return in(t, pointer_set | cstring_set) ? pt::pointer : pt::none; + default: + return pt::none; + } +} + +template +void vprintf(buffer& buf, basic_string_view format, + basic_format_args args) { + using iterator = buffer_appender; + auto out = iterator(buf); + auto context = basic_printf_context(out, args); + auto parse_ctx = basic_format_parse_context(format); + + // Returns the argument with specified index or, if arg_index is -1, the next + // argument. + auto get_arg = [&](int arg_index) { + if (arg_index < 0) + arg_index = parse_ctx.next_arg_id(); + else + parse_ctx.check_arg_id(--arg_index); + return detail::get_arg(context, arg_index); + }; + + const Char* start = parse_ctx.begin(); + const Char* end = parse_ctx.end(); + auto it = start; + while (it != end) { + if (!find(it, end, '%', it)) { + it = end; // find leaves it == nullptr if it doesn't find '%'. + break; + } + Char c = *it++; + if (it != end && *it == c) { + write(out, basic_string_view(start, to_unsigned(it - start))); + start = ++it; + continue; + } + write(out, basic_string_view(start, to_unsigned(it - 1 - start))); + + auto specs = format_specs(); + specs.align = align::right; + + // Parse argument index, flags and width. + int arg_index = parse_header(it, end, specs, get_arg); + if (arg_index == 0) throw_format_error("argument not found"); + + // Parse precision. + if (it != end && *it == '.') { + ++it; + c = it != end ? *it : 0; + if ('0' <= c && c <= '9') { + specs.precision = parse_nonnegative_int(it, end, 0); + } else if (c == '*') { + ++it; + specs.precision = static_cast( + visit_format_arg(printf_precision_handler(), get_arg(-1))); + } else { + specs.precision = 0; + } + } + + auto arg = get_arg(arg_index); + // For d, i, o, u, x, and X conversion specifiers, if a precision is + // specified, the '0' flag is ignored + if (specs.precision >= 0 && arg.is_integral()) { + // Ignore '0' for non-numeric types or if '-' present. + specs.fill[0] = ' '; + } + if (specs.precision >= 0 && arg.type() == type::cstring_type) { + auto str = visit_format_arg(get_cstring(), arg); + auto str_end = str + specs.precision; + auto nul = std::find(str, str_end, Char()); + auto sv = basic_string_view( + str, to_unsigned(nul != str_end ? nul - str : specs.precision)); + arg = make_arg>(sv); + } + if (specs.alt && visit_format_arg(is_zero_int(), arg)) specs.alt = false; + if (specs.fill[0] == '0') { + if (arg.is_arithmetic() && specs.align != align::left) + specs.align = align::numeric; + else + specs.fill[0] = ' '; // Ignore '0' flag for non-numeric types or if '-' + // flag is also present. + } + + // Parse length and convert the argument to the required type. + c = it != end ? *it++ : 0; + Char t = it != end ? *it : 0; + switch (c) { + case 'h': + if (t == 'h') { + ++it; + t = it != end ? *it : 0; + convert_arg(arg, t); + } else { + convert_arg(arg, t); + } + break; + case 'l': + if (t == 'l') { + ++it; + t = it != end ? *it : 0; + convert_arg(arg, t); + } else { + convert_arg(arg, t); + } + break; + case 'j': + convert_arg(arg, t); + break; + case 'z': + convert_arg(arg, t); + break; + case 't': + convert_arg(arg, t); + break; + case 'L': + // printf produces garbage when 'L' is omitted for long double, no + // need to do the same. + break; + default: + --it; + convert_arg(arg, c); + } + + // Parse type. + if (it == end) throw_format_error("invalid format string"); + char type = static_cast(*it++); + if (arg.is_integral()) { + // Normalize type. + switch (type) { + case 'i': + case 'u': + type = 'd'; + break; + case 'c': + visit_format_arg(char_converter>(arg), arg); + break; + } + } + specs.type = parse_printf_presentation_type(type, arg.type()); + if (specs.type == presentation_type::none) + throw_format_error("invalid format specifier"); + + start = it; + + // Format argument. + visit_format_arg(printf_arg_formatter(out, specs, context), arg); + } + write(out, basic_string_view(start, to_unsigned(it - start))); +} +} // namespace detail + +using printf_context = basic_printf_context; +using wprintf_context = basic_printf_context; + +using printf_args = basic_format_args; +using wprintf_args = basic_format_args; + +/** + \rst + Constructs an `~fmt::format_arg_store` object that contains references to + arguments and can be implicitly converted to `~fmt::printf_args`. + \endrst + */ +template +inline auto make_printf_args(const T&... args) + -> format_arg_store { + return {args...}; +} + +// DEPRECATED! +template +inline auto make_wprintf_args(const T&... args) + -> format_arg_store { + return {args...}; +} + +template +inline auto vsprintf( + basic_string_view fmt, + basic_format_args>> args) + -> std::basic_string { + auto buf = basic_memory_buffer(); + detail::vprintf(buf, fmt, args); + return to_string(buf); +} + +/** + \rst + Formats arguments and returns the result as a string. + + **Example**:: + + std::string message = fmt::sprintf("The answer is %d", 42); + \endrst +*/ +template ::value, char_t>> +inline auto sprintf(const S& fmt, const T&... args) -> std::basic_string { + return vsprintf(detail::to_string_view(fmt), + fmt::make_format_args>(args...)); +} + +template +inline auto vfprintf( + std::FILE* f, basic_string_view fmt, + basic_format_args>> args) + -> int { + auto buf = basic_memory_buffer(); + detail::vprintf(buf, fmt, args); + size_t size = buf.size(); + return std::fwrite(buf.data(), sizeof(Char), size, f) < size + ? -1 + : static_cast(size); +} + +/** + \rst + Prints formatted data to the file *f*. + + **Example**:: + + fmt::fprintf(stderr, "Don't %s!", "panic"); + \endrst + */ +template > +inline auto fprintf(std::FILE* f, const S& fmt, const T&... args) -> int { + return vfprintf(f, detail::to_string_view(fmt), + fmt::make_format_args>(args...)); +} + +template +FMT_DEPRECATED inline auto vprintf( + basic_string_view fmt, + basic_format_args>> args) + -> int { + return vfprintf(stdout, fmt, args); +} + +/** + \rst + Prints formatted data to ``stdout``. + + **Example**:: + + fmt::printf("Elapsed time: %.2f seconds", 1.23); + \endrst + */ +template +inline auto printf(string_view fmt, const T&... args) -> int { + return vfprintf(stdout, fmt, make_printf_args(args...)); +} +template +FMT_DEPRECATED inline auto printf(basic_string_view fmt, + const T&... args) -> int { + return vfprintf(stdout, fmt, make_wprintf_args(args...)); +} + +FMT_END_EXPORT +FMT_END_NAMESPACE + +#endif // FMT_PRINTF_H_ diff --git a/c/vendor/fmt/include/fmt/ranges.h b/c/vendor/fmt/include/fmt/ranges.h new file mode 100644 index 0000000000..3638fffb83 --- /dev/null +++ b/c/vendor/fmt/include/fmt/ranges.h @@ -0,0 +1,738 @@ +// Formatting library for C++ - range and tuple support +// +// Copyright (c) 2012 - present, Victor Zverovich and {fmt} contributors +// All rights reserved. +// +// For the license information refer to format.h. + +#ifndef FMT_RANGES_H_ +#define FMT_RANGES_H_ + +#include +#include +#include + +#include "format.h" + +FMT_BEGIN_NAMESPACE + +namespace detail { + +template +auto copy(const Range& range, OutputIt out) -> OutputIt { + for (auto it = range.begin(), end = range.end(); it != end; ++it) + *out++ = *it; + return out; +} + +template +auto copy(const char* str, OutputIt out) -> OutputIt { + while (*str) *out++ = *str++; + return out; +} + +template auto copy(char ch, OutputIt out) -> OutputIt { + *out++ = ch; + return out; +} + +template auto copy(wchar_t ch, OutputIt out) -> OutputIt { + *out++ = ch; + return out; +} + +// Returns true if T has a std::string-like interface, like std::string_view. +template class is_std_string_like { + template + static auto check(U* p) + -> decltype((void)p->find('a'), p->length(), (void)p->data(), int()); + template static void check(...); + + public: + static constexpr const bool value = + is_string::value || + std::is_convertible>::value || + !std::is_void(nullptr))>::value; +}; + +template +struct is_std_string_like> : std::true_type {}; + +template class is_map { + template static auto check(U*) -> typename U::mapped_type; + template static void check(...); + + public: +#ifdef FMT_FORMAT_MAP_AS_LIST // DEPRECATED! + static constexpr const bool value = false; +#else + static constexpr const bool value = + !std::is_void(nullptr))>::value; +#endif +}; + +template class is_set { + template static auto check(U*) -> typename U::key_type; + template static void check(...); + + public: +#ifdef FMT_FORMAT_SET_AS_LIST // DEPRECATED! + static constexpr const bool value = false; +#else + static constexpr const bool value = + !std::is_void(nullptr))>::value && !is_map::value; +#endif +}; + +template struct conditional_helper {}; + +template struct is_range_ : std::false_type {}; + +#if !FMT_MSC_VERSION || FMT_MSC_VERSION > 1800 + +# define FMT_DECLTYPE_RETURN(val) \ + ->decltype(val) { return val; } \ + static_assert( \ + true, "") // This makes it so that a semicolon is required after the + // macro, which helps clang-format handle the formatting. + +// C array overload +template +auto range_begin(const T (&arr)[N]) -> const T* { + return arr; +} +template +auto range_end(const T (&arr)[N]) -> const T* { + return arr + N; +} + +template +struct has_member_fn_begin_end_t : std::false_type {}; + +template +struct has_member_fn_begin_end_t().begin()), + decltype(std::declval().end())>> + : std::true_type {}; + +// Member function overload +template +auto range_begin(T&& rng) FMT_DECLTYPE_RETURN(static_cast(rng).begin()); +template +auto range_end(T&& rng) FMT_DECLTYPE_RETURN(static_cast(rng).end()); + +// ADL overload. Only participates in overload resolution if member functions +// are not found. +template +auto range_begin(T&& rng) + -> enable_if_t::value, + decltype(begin(static_cast(rng)))> { + return begin(static_cast(rng)); +} +template +auto range_end(T&& rng) -> enable_if_t::value, + decltype(end(static_cast(rng)))> { + return end(static_cast(rng)); +} + +template +struct has_const_begin_end : std::false_type {}; +template +struct has_mutable_begin_end : std::false_type {}; + +template +struct has_const_begin_end< + T, + void_t< + decltype(detail::range_begin(std::declval&>())), + decltype(detail::range_end(std::declval&>()))>> + : std::true_type {}; + +template +struct has_mutable_begin_end< + T, void_t())), + decltype(detail::range_end(std::declval())), + // the extra int here is because older versions of MSVC don't + // SFINAE properly unless there are distinct types + int>> : std::true_type {}; + +template +struct is_range_ + : std::integral_constant::value || + has_mutable_begin_end::value)> {}; +# undef FMT_DECLTYPE_RETURN +#endif + +// tuple_size and tuple_element check. +template class is_tuple_like_ { + template + static auto check(U* p) -> decltype(std::tuple_size::value, int()); + template static void check(...); + + public: + static constexpr const bool value = + !std::is_void(nullptr))>::value; +}; + +// Check for integer_sequence +#if defined(__cpp_lib_integer_sequence) || FMT_MSC_VERSION >= 1900 +template +using integer_sequence = std::integer_sequence; +template using index_sequence = std::index_sequence; +template using make_index_sequence = std::make_index_sequence; +#else +template struct integer_sequence { + using value_type = T; + + static FMT_CONSTEXPR auto size() -> size_t { return sizeof...(N); } +}; + +template using index_sequence = integer_sequence; + +template +struct make_integer_sequence : make_integer_sequence {}; +template +struct make_integer_sequence : integer_sequence {}; + +template +using make_index_sequence = make_integer_sequence; +#endif + +template +using tuple_index_sequence = make_index_sequence::value>; + +template ::value> +class is_tuple_formattable_ { + public: + static constexpr const bool value = false; +}; +template class is_tuple_formattable_ { + template + static auto check2(index_sequence, + integer_sequence) -> std::true_type; + static auto check2(...) -> std::false_type; + template + static auto check(index_sequence) -> decltype(check2( + index_sequence{}, + integer_sequence::type, + C>::value)...>{})); + + public: + static constexpr const bool value = + decltype(check(tuple_index_sequence{}))::value; +}; + +template +FMT_CONSTEXPR void for_each(index_sequence, Tuple&& t, F&& f) { + using std::get; + // Using a free function get(Tuple) now. + const int unused[] = {0, ((void)f(get(t)), 0)...}; + ignore_unused(unused); +} + +template +FMT_CONSTEXPR void for_each(Tuple&& t, F&& f) { + for_each(tuple_index_sequence>(), + std::forward(t), std::forward(f)); +} + +template +void for_each2(index_sequence, Tuple1&& t1, Tuple2&& t2, F&& f) { + using std::get; + const int unused[] = {0, ((void)f(get(t1), get(t2)), 0)...}; + ignore_unused(unused); +} + +template +void for_each2(Tuple1&& t1, Tuple2&& t2, F&& f) { + for_each2(tuple_index_sequence>(), + std::forward(t1), std::forward(t2), + std::forward(f)); +} + +namespace tuple { +// Workaround a bug in MSVC 2019 (v140). +template +using result_t = std::tuple, Char>...>; + +using std::get; +template +auto get_formatters(index_sequence) + -> result_t(std::declval()))...>; +} // namespace tuple + +#if FMT_MSC_VERSION && FMT_MSC_VERSION < 1920 +// Older MSVC doesn't get the reference type correctly for arrays. +template struct range_reference_type_impl { + using type = decltype(*detail::range_begin(std::declval())); +}; + +template struct range_reference_type_impl { + using type = T&; +}; + +template +using range_reference_type = typename range_reference_type_impl::type; +#else +template +using range_reference_type = + decltype(*detail::range_begin(std::declval())); +#endif + +// We don't use the Range's value_type for anything, but we do need the Range's +// reference type, with cv-ref stripped. +template +using uncvref_type = remove_cvref_t>; + +template +FMT_CONSTEXPR auto maybe_set_debug_format(Formatter& f, bool set) + -> decltype(f.set_debug_format(set)) { + f.set_debug_format(set); +} +template +FMT_CONSTEXPR void maybe_set_debug_format(Formatter&, ...) {} + +// These are not generic lambdas for compatibility with C++11. +template struct parse_empty_specs { + template FMT_CONSTEXPR void operator()(Formatter& f) { + f.parse(ctx); + detail::maybe_set_debug_format(f, true); + } + ParseContext& ctx; +}; +template struct format_tuple_element { + using char_type = typename FormatContext::char_type; + + template + void operator()(const formatter& f, const T& v) { + if (i > 0) + ctx.advance_to(detail::copy_str(separator, ctx.out())); + ctx.advance_to(f.format(v, ctx)); + ++i; + } + + int i; + FormatContext& ctx; + basic_string_view separator; +}; + +} // namespace detail + +template struct is_tuple_like { + static constexpr const bool value = + detail::is_tuple_like_::value && !detail::is_range_::value; +}; + +template struct is_tuple_formattable { + static constexpr const bool value = + detail::is_tuple_formattable_::value; +}; + +template +struct formatter::value && + fmt::is_tuple_formattable::value>> { + private: + decltype(detail::tuple::get_formatters( + detail::tuple_index_sequence())) formatters_; + + basic_string_view separator_ = detail::string_literal{}; + basic_string_view opening_bracket_ = + detail::string_literal{}; + basic_string_view closing_bracket_ = + detail::string_literal{}; + + public: + FMT_CONSTEXPR formatter() {} + + FMT_CONSTEXPR void set_separator(basic_string_view sep) { + separator_ = sep; + } + + FMT_CONSTEXPR void set_brackets(basic_string_view open, + basic_string_view close) { + opening_bracket_ = open; + closing_bracket_ = close; + } + + template + FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) { + auto it = ctx.begin(); + if (it != ctx.end() && *it != '}') + FMT_THROW(format_error("invalid format specifier")); + detail::for_each(formatters_, detail::parse_empty_specs{ctx}); + return it; + } + + template + auto format(const Tuple& value, FormatContext& ctx) const + -> decltype(ctx.out()) { + ctx.advance_to(detail::copy_str(opening_bracket_, ctx.out())); + detail::for_each2( + formatters_, value, + detail::format_tuple_element{0, ctx, separator_}); + return detail::copy_str(closing_bracket_, ctx.out()); + } +}; + +template struct is_range { + static constexpr const bool value = + detail::is_range_::value && !detail::is_std_string_like::value && + !std::is_convertible>::value && + !std::is_convertible>::value; +}; + +namespace detail { +template struct range_mapper { + using mapper = arg_mapper; + + template , Context>::value)> + static auto map(T&& value) -> T&& { + return static_cast(value); + } + template , Context>::value)> + static auto map(T&& value) + -> decltype(mapper().map(static_cast(value))) { + return mapper().map(static_cast(value)); + } +}; + +template +using range_formatter_type = + formatter>{}.map( + std::declval()))>, + Char>; + +template +using maybe_const_range = + conditional_t::value, const R, R>; + +// Workaround a bug in MSVC 2015 and earlier. +#if !FMT_MSC_VERSION || FMT_MSC_VERSION >= 1910 +template +struct is_formattable_delayed + : is_formattable>, Char> {}; +#endif +} // namespace detail + +template struct conjunction : std::true_type {}; +template struct conjunction

: P {}; +template +struct conjunction + : conditional_t, P1> {}; + +template +struct range_formatter; + +template +struct range_formatter< + T, Char, + enable_if_t>, + is_formattable>::value>> { + private: + detail::range_formatter_type underlying_; + basic_string_view separator_ = detail::string_literal{}; + basic_string_view opening_bracket_ = + detail::string_literal{}; + basic_string_view closing_bracket_ = + detail::string_literal{}; + + public: + FMT_CONSTEXPR range_formatter() {} + + FMT_CONSTEXPR auto underlying() -> detail::range_formatter_type& { + return underlying_; + } + + FMT_CONSTEXPR void set_separator(basic_string_view sep) { + separator_ = sep; + } + + FMT_CONSTEXPR void set_brackets(basic_string_view open, + basic_string_view close) { + opening_bracket_ = open; + closing_bracket_ = close; + } + + template + FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) { + auto it = ctx.begin(); + auto end = ctx.end(); + + if (it != end && *it == 'n') { + set_brackets({}, {}); + ++it; + } + + if (it != end && *it != '}') { + if (*it != ':') FMT_THROW(format_error("invalid format specifier")); + ++it; + } else { + detail::maybe_set_debug_format(underlying_, true); + } + + ctx.advance_to(it); + return underlying_.parse(ctx); + } + + template + auto format(R&& range, FormatContext& ctx) const -> decltype(ctx.out()) { + detail::range_mapper> mapper; + auto out = ctx.out(); + out = detail::copy_str(opening_bracket_, out); + int i = 0; + auto it = detail::range_begin(range); + auto end = detail::range_end(range); + for (; it != end; ++it) { + if (i > 0) out = detail::copy_str(separator_, out); + ctx.advance_to(out); + auto&& item = *it; + out = underlying_.format(mapper.map(item), ctx); + ++i; + } + out = detail::copy_str(closing_bracket_, out); + return out; + } +}; + +enum class range_format { disabled, map, set, sequence, string, debug_string }; + +namespace detail { +template +struct range_format_kind_ + : std::integral_constant, T>::value + ? range_format::disabled + : is_map::value ? range_format::map + : is_set::value ? range_format::set + : range_format::sequence> {}; + +template +struct range_default_formatter; + +template +using range_format_constant = std::integral_constant; + +template +struct range_default_formatter< + K, R, Char, + enable_if_t<(K == range_format::sequence || K == range_format::map || + K == range_format::set)>> { + using range_type = detail::maybe_const_range; + range_formatter, Char> underlying_; + + FMT_CONSTEXPR range_default_formatter() { init(range_format_constant()); } + + FMT_CONSTEXPR void init(range_format_constant) { + underlying_.set_brackets(detail::string_literal{}, + detail::string_literal{}); + } + + FMT_CONSTEXPR void init(range_format_constant) { + underlying_.set_brackets(detail::string_literal{}, + detail::string_literal{}); + underlying_.underlying().set_brackets({}, {}); + underlying_.underlying().set_separator( + detail::string_literal{}); + } + + FMT_CONSTEXPR void init(range_format_constant) {} + + template + FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) { + return underlying_.parse(ctx); + } + + template + auto format(range_type& range, FormatContext& ctx) const + -> decltype(ctx.out()) { + return underlying_.format(range, ctx); + } +}; +} // namespace detail + +template +struct range_format_kind + : conditional_t< + is_range::value, detail::range_format_kind_, + std::integral_constant> {}; + +template +struct formatter< + R, Char, + enable_if_t::value != + range_format::disabled> +// Workaround a bug in MSVC 2015 and earlier. +#if !FMT_MSC_VERSION || FMT_MSC_VERSION >= 1910 + , + detail::is_formattable_delayed +#endif + >::value>> + : detail::range_default_formatter::value, R, + Char> { +}; + +template struct tuple_join_view : detail::view { + const std::tuple& tuple; + basic_string_view sep; + + tuple_join_view(const std::tuple& t, basic_string_view s) + : tuple(t), sep{s} {} +}; + +// Define FMT_TUPLE_JOIN_SPECIFIERS to enable experimental format specifiers +// support in tuple_join. It is disabled by default because of issues with +// the dynamic width and precision. +#ifndef FMT_TUPLE_JOIN_SPECIFIERS +# define FMT_TUPLE_JOIN_SPECIFIERS 0 +#endif + +template +struct formatter, Char> { + template + FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) { + return do_parse(ctx, std::integral_constant()); + } + + template + auto format(const tuple_join_view& value, + FormatContext& ctx) const -> typename FormatContext::iterator { + return do_format(value, ctx, + std::integral_constant()); + } + + private: + std::tuple::type, Char>...> formatters_; + + template + FMT_CONSTEXPR auto do_parse(ParseContext& ctx, + std::integral_constant) + -> decltype(ctx.begin()) { + return ctx.begin(); + } + + template + FMT_CONSTEXPR auto do_parse(ParseContext& ctx, + std::integral_constant) + -> decltype(ctx.begin()) { + auto end = ctx.begin(); +#if FMT_TUPLE_JOIN_SPECIFIERS + end = std::get(formatters_).parse(ctx); + if (N > 1) { + auto end1 = do_parse(ctx, std::integral_constant()); + if (end != end1) + FMT_THROW(format_error("incompatible format specs for tuple elements")); + } +#endif + return end; + } + + template + auto do_format(const tuple_join_view&, FormatContext& ctx, + std::integral_constant) const -> + typename FormatContext::iterator { + return ctx.out(); + } + + template + auto do_format(const tuple_join_view& value, FormatContext& ctx, + std::integral_constant) const -> + typename FormatContext::iterator { + auto out = std::get(formatters_) + .format(std::get(value.tuple), ctx); + if (N > 1) { + out = std::copy(value.sep.begin(), value.sep.end(), out); + ctx.advance_to(out); + return do_format(value, ctx, std::integral_constant()); + } + return out; + } +}; + +namespace detail { +// Check if T has an interface like a container adaptor (e.g. std::stack, +// std::queue, std::priority_queue). +template class is_container_adaptor_like { + template static auto check(U* p) -> typename U::container_type; + template static void check(...); + + public: + static constexpr const bool value = + !std::is_void(nullptr))>::value; +}; + +template struct all { + const Container& c; + auto begin() const -> typename Container::const_iterator { return c.begin(); } + auto end() const -> typename Container::const_iterator { return c.end(); } +}; +} // namespace detail + +template +struct formatter< + T, Char, + enable_if_t, + bool_constant::value == + range_format::disabled>>::value>> + : formatter, Char> { + using all = detail::all; + template + auto format(const T& t, FormatContext& ctx) const -> decltype(ctx.out()) { + struct getter : T { + static auto get(const T& t) -> all { + return {t.*(&getter::c)}; // Access c through the derived class. + } + }; + return formatter::format(getter::get(t), ctx); + } +}; + +FMT_BEGIN_EXPORT + +/** + \rst + Returns an object that formats `tuple` with elements separated by `sep`. + + **Example**:: + + std::tuple t = {1, 'a'}; + fmt::print("{}", fmt::join(t, ", ")); + // Output: "1, a" + \endrst + */ +template +FMT_CONSTEXPR auto join(const std::tuple& tuple, string_view sep) + -> tuple_join_view { + return {tuple, sep}; +} + +template +FMT_CONSTEXPR auto join(const std::tuple& tuple, + basic_string_view sep) + -> tuple_join_view { + return {tuple, sep}; +} + +/** + \rst + Returns an object that formats `initializer_list` with elements separated by + `sep`. + + **Example**:: + + fmt::print("{}", fmt::join({1, 2, 3}, ", ")); + // Output: "1, 2, 3" + \endrst + */ +template +auto join(std::initializer_list list, string_view sep) + -> join_view { + return join(std::begin(list), std::end(list), sep); +} + +FMT_END_EXPORT +FMT_END_NAMESPACE + +#endif // FMT_RANGES_H_ diff --git a/c/vendor/fmt/include/fmt/std.h b/c/vendor/fmt/include/fmt/std.h new file mode 100644 index 0000000000..7cff115920 --- /dev/null +++ b/c/vendor/fmt/include/fmt/std.h @@ -0,0 +1,537 @@ +// Formatting library for C++ - formatters for standard library types +// +// Copyright (c) 2012 - present, Victor Zverovich +// All rights reserved. +// +// For the license information refer to format.h. + +#ifndef FMT_STD_H_ +#define FMT_STD_H_ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "format.h" +#include "ostream.h" + +#if FMT_HAS_INCLUDE() +# include +#endif +// Checking FMT_CPLUSPLUS for warning suppression in MSVC. +#if FMT_CPLUSPLUS >= 201703L +# if FMT_HAS_INCLUDE() +# include +# endif +# if FMT_HAS_INCLUDE() +# include +# endif +# if FMT_HAS_INCLUDE() +# include +# endif +#endif + +#if FMT_CPLUSPLUS > 201703L && FMT_HAS_INCLUDE() +# include +#endif + +// GCC 4 does not support FMT_HAS_INCLUDE. +#if FMT_HAS_INCLUDE() || defined(__GLIBCXX__) +# include +// Android NDK with gabi++ library on some architectures does not implement +// abi::__cxa_demangle(). +# ifndef __GABIXX_CXXABI_H__ +# define FMT_HAS_ABI_CXA_DEMANGLE +# endif +#endif + +// Check if typeid is available. +#ifndef FMT_USE_TYPEID +// __RTTI is for EDG compilers. In MSVC typeid is available without RTTI. +# if defined(__GXX_RTTI) || FMT_HAS_FEATURE(cxx_rtti) || FMT_MSC_VERSION || \ + defined(__INTEL_RTTI__) || defined(__RTTI) +# define FMT_USE_TYPEID 1 +# else +# define FMT_USE_TYPEID 0 +# endif +#endif + +// For older Xcode versions, __cpp_lib_xxx flags are inaccurately defined. +#ifndef FMT_CPP_LIB_FILESYSTEM +# ifdef __cpp_lib_filesystem +# define FMT_CPP_LIB_FILESYSTEM __cpp_lib_filesystem +# else +# define FMT_CPP_LIB_FILESYSTEM 0 +# endif +#endif + +#ifndef FMT_CPP_LIB_VARIANT +# ifdef __cpp_lib_variant +# define FMT_CPP_LIB_VARIANT __cpp_lib_variant +# else +# define FMT_CPP_LIB_VARIANT 0 +# endif +#endif + +#if FMT_CPP_LIB_FILESYSTEM +FMT_BEGIN_NAMESPACE + +namespace detail { + +template +auto get_path_string(const std::filesystem::path& p, + const std::basic_string& native) { + if constexpr (std::is_same_v && std::is_same_v) + return to_utf8(native, to_utf8_error_policy::replace); + else + return p.string(); +} + +template +void write_escaped_path(basic_memory_buffer& quoted, + const std::filesystem::path& p, + const std::basic_string& native) { + if constexpr (std::is_same_v && + std::is_same_v) { + auto buf = basic_memory_buffer(); + write_escaped_string(std::back_inserter(buf), native); + bool valid = to_utf8::convert(quoted, {buf.data(), buf.size()}); + FMT_ASSERT(valid, "invalid utf16"); + } else if constexpr (std::is_same_v) { + write_escaped_string( + std::back_inserter(quoted), native); + } else { + write_escaped_string(std::back_inserter(quoted), p.string()); + } +} + +} // namespace detail + +FMT_EXPORT +template struct formatter { + private: + format_specs specs_; + detail::arg_ref width_ref_; + bool debug_ = false; + char path_type_ = 0; + + public: + FMT_CONSTEXPR void set_debug_format(bool set = true) { debug_ = set; } + + template FMT_CONSTEXPR auto parse(ParseContext& ctx) { + auto it = ctx.begin(), end = ctx.end(); + if (it == end) return it; + + it = detail::parse_align(it, end, specs_); + if (it == end) return it; + + it = detail::parse_dynamic_spec(it, end, specs_.width, width_ref_, ctx); + if (it != end && *it == '?') { + debug_ = true; + ++it; + } + if (it != end && (*it == 'g')) path_type_ = *it++; + return it; + } + + template + auto format(const std::filesystem::path& p, FormatContext& ctx) const { + auto specs = specs_; +# ifdef _WIN32 + auto path_string = !path_type_ ? p.native() : p.generic_wstring(); +# else + auto path_string = !path_type_ ? p.native() : p.generic_string(); +# endif + + detail::handle_dynamic_spec(specs.width, width_ref_, + ctx); + if (!debug_) { + auto s = detail::get_path_string(p, path_string); + return detail::write(ctx.out(), basic_string_view(s), specs); + } + auto quoted = basic_memory_buffer(); + detail::write_escaped_path(quoted, p, path_string); + return detail::write(ctx.out(), + basic_string_view(quoted.data(), quoted.size()), + specs); + } +}; +FMT_END_NAMESPACE +#endif // FMT_CPP_LIB_FILESYSTEM + +FMT_BEGIN_NAMESPACE +FMT_EXPORT +template +struct formatter, Char> : nested_formatter { + private: + // Functor because C++11 doesn't support generic lambdas. + struct writer { + const std::bitset& bs; + + template + FMT_CONSTEXPR auto operator()(OutputIt out) -> OutputIt { + for (auto pos = N; pos > 0; --pos) { + out = detail::write(out, bs[pos - 1] ? Char('1') : Char('0')); + } + + return out; + } + }; + + public: + template + auto format(const std::bitset& bs, FormatContext& ctx) const + -> decltype(ctx.out()) { + return write_padded(ctx, writer{bs}); + } +}; + +FMT_EXPORT +template +struct formatter : basic_ostream_formatter {}; +FMT_END_NAMESPACE + +#ifdef __cpp_lib_optional +FMT_BEGIN_NAMESPACE +FMT_EXPORT +template +struct formatter, Char, + std::enable_if_t::value>> { + private: + formatter underlying_; + static constexpr basic_string_view optional = + detail::string_literal{}; + static constexpr basic_string_view none = + detail::string_literal{}; + + template + FMT_CONSTEXPR static auto maybe_set_debug_format(U& u, bool set) + -> decltype(u.set_debug_format(set)) { + u.set_debug_format(set); + } + + template + FMT_CONSTEXPR static void maybe_set_debug_format(U&, ...) {} + + public: + template FMT_CONSTEXPR auto parse(ParseContext& ctx) { + maybe_set_debug_format(underlying_, true); + return underlying_.parse(ctx); + } + + template + auto format(const std::optional& opt, FormatContext& ctx) const + -> decltype(ctx.out()) { + if (!opt) return detail::write(ctx.out(), none); + + auto out = ctx.out(); + out = detail::write(out, optional); + ctx.advance_to(out); + out = underlying_.format(*opt, ctx); + return detail::write(out, ')'); + } +}; +FMT_END_NAMESPACE +#endif // __cpp_lib_optional + +#ifdef __cpp_lib_source_location +FMT_BEGIN_NAMESPACE +FMT_EXPORT +template <> struct formatter { + template FMT_CONSTEXPR auto parse(ParseContext& ctx) { + return ctx.begin(); + } + + template + auto format(const std::source_location& loc, FormatContext& ctx) const + -> decltype(ctx.out()) { + auto out = ctx.out(); + out = detail::write(out, loc.file_name()); + out = detail::write(out, ':'); + out = detail::write(out, loc.line()); + out = detail::write(out, ':'); + out = detail::write(out, loc.column()); + out = detail::write(out, ": "); + out = detail::write(out, loc.function_name()); + return out; + } +}; +FMT_END_NAMESPACE +#endif + +#if FMT_CPP_LIB_VARIANT +FMT_BEGIN_NAMESPACE +namespace detail { + +template +using variant_index_sequence = + std::make_index_sequence::value>; + +template struct is_variant_like_ : std::false_type {}; +template +struct is_variant_like_> : std::true_type {}; + +// formattable element check. +template class is_variant_formattable_ { + template + static std::conjunction< + is_formattable, C>...> + check(std::index_sequence); + + public: + static constexpr const bool value = + decltype(check(variant_index_sequence{}))::value; +}; + +template +auto write_variant_alternative(OutputIt out, const T& v) -> OutputIt { + if constexpr (is_string::value) + return write_escaped_string(out, detail::to_string_view(v)); + else if constexpr (std::is_same_v) + return write_escaped_char(out, v); + else + return write(out, v); +} + +} // namespace detail + +template struct is_variant_like { + static constexpr const bool value = detail::is_variant_like_::value; +}; + +template struct is_variant_formattable { + static constexpr const bool value = + detail::is_variant_formattable_::value; +}; + +FMT_EXPORT +template struct formatter { + template + FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) { + return ctx.begin(); + } + + template + auto format(const std::monostate&, FormatContext& ctx) const + -> decltype(ctx.out()) { + return detail::write(ctx.out(), "monostate"); + } +}; + +FMT_EXPORT +template +struct formatter< + Variant, Char, + std::enable_if_t, is_variant_formattable>>> { + template + FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) { + return ctx.begin(); + } + + template + auto format(const Variant& value, FormatContext& ctx) const + -> decltype(ctx.out()) { + auto out = ctx.out(); + + out = detail::write(out, "variant("); + FMT_TRY { + std::visit( + [&](const auto& v) { + out = detail::write_variant_alternative(out, v); + }, + value); + } + FMT_CATCH(const std::bad_variant_access&) { + detail::write(out, "valueless by exception"); + } + *out++ = ')'; + return out; + } +}; +FMT_END_NAMESPACE +#endif // FMT_CPP_LIB_VARIANT + +FMT_BEGIN_NAMESPACE +FMT_EXPORT +template struct formatter { + template + FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) { + return ctx.begin(); + } + + template + FMT_CONSTEXPR auto format(const std::error_code& ec, FormatContext& ctx) const + -> decltype(ctx.out()) { + auto out = ctx.out(); + out = detail::write_bytes(out, ec.category().name(), format_specs()); + out = detail::write(out, Char(':')); + out = detail::write(out, ec.value()); + return out; + } +}; + +FMT_EXPORT +template +struct formatter< + T, Char, // DEPRECATED! Mixing code unit types. + typename std::enable_if::value>::type> { + private: + bool with_typename_ = false; + + public: + FMT_CONSTEXPR auto parse(basic_format_parse_context& ctx) + -> decltype(ctx.begin()) { + auto it = ctx.begin(); + auto end = ctx.end(); + if (it == end || *it == '}') return it; + if (*it == 't') { + ++it; + with_typename_ = FMT_USE_TYPEID != 0; + } + return it; + } + + template + auto format(const std::exception& ex, + basic_format_context& ctx) const -> OutputIt { + format_specs spec; + auto out = ctx.out(); + if (!with_typename_) + return detail::write_bytes(out, string_view(ex.what()), spec); + +#if FMT_USE_TYPEID + const std::type_info& ti = typeid(ex); +# ifdef FMT_HAS_ABI_CXA_DEMANGLE + int status = 0; + std::size_t size = 0; + std::unique_ptr demangled_name_ptr( + abi::__cxa_demangle(ti.name(), nullptr, &size, &status), &std::free); + + string_view demangled_name_view; + if (demangled_name_ptr) { + demangled_name_view = demangled_name_ptr.get(); + + // Normalization of stdlib inline namespace names. + // libc++ inline namespaces. + // std::__1::* -> std::* + // std::__1::__fs::* -> std::* + // libstdc++ inline namespaces. + // std::__cxx11::* -> std::* + // std::filesystem::__cxx11::* -> std::filesystem::* + if (demangled_name_view.starts_with("std::")) { + char* begin = demangled_name_ptr.get(); + char* to = begin + 5; // std:: + for (char *from = to, *end = begin + demangled_name_view.size(); + from < end;) { + // This is safe, because demangled_name is NUL-terminated. + if (from[0] == '_' && from[1] == '_') { + char* next = from + 1; + while (next < end && *next != ':') next++; + if (next[0] == ':' && next[1] == ':') { + from = next + 2; + continue; + } + } + *to++ = *from++; + } + demangled_name_view = {begin, detail::to_unsigned(to - begin)}; + } + } else { + demangled_name_view = string_view(ti.name()); + } + out = detail::write_bytes(out, demangled_name_view, spec); +# elif FMT_MSC_VERSION + string_view demangled_name_view(ti.name()); + if (demangled_name_view.starts_with("class ")) + demangled_name_view.remove_prefix(6); + else if (demangled_name_view.starts_with("struct ")) + demangled_name_view.remove_prefix(7); + out = detail::write_bytes(out, demangled_name_view, spec); +# else + out = detail::write_bytes(out, string_view(ti.name()), spec); +# endif + *out++ = ':'; + *out++ = ' '; + return detail::write_bytes(out, string_view(ex.what()), spec); +#endif + } +}; + +namespace detail { + +template +struct has_flip : std::false_type {}; + +template +struct has_flip().flip())>> + : std::true_type {}; + +template struct is_bit_reference_like { + static constexpr const bool value = + std::is_convertible::value && + std::is_nothrow_assignable::value && has_flip::value; +}; + +#ifdef _LIBCPP_VERSION + +// Workaround for libc++ incompatibility with C++ standard. +// According to the Standard, `bitset::operator[] const` returns bool. +template +struct is_bit_reference_like> { + static constexpr const bool value = true; +}; + +#endif + +} // namespace detail + +// We can't use std::vector::reference and +// std::bitset::reference because the compiler can't deduce Allocator and N +// in partial specialization. +FMT_EXPORT +template +struct formatter::value>> + : formatter { + template + FMT_CONSTEXPR auto format(const BitRef& v, FormatContext& ctx) const + -> decltype(ctx.out()) { + return formatter::format(v, ctx); + } +}; + +FMT_EXPORT +template +struct formatter, Char, + enable_if_t::value>> + : formatter { + template + auto format(const std::atomic& v, FormatContext& ctx) const + -> decltype(ctx.out()) { + return formatter::format(v.load(), ctx); + } +}; + +#ifdef __cpp_lib_atomic_flag_test +FMT_EXPORT +template +struct formatter : formatter { + template + auto format(const std::atomic_flag& v, FormatContext& ctx) const + -> decltype(ctx.out()) { + return formatter::format(v.test(), ctx); + } +}; +#endif // __cpp_lib_atomic_flag_test + +FMT_END_NAMESPACE +#endif // FMT_STD_H_ diff --git a/c/vendor/fmt/include/fmt/xchar.h b/c/vendor/fmt/include/fmt/xchar.h new file mode 100644 index 0000000000..f609c5c41a --- /dev/null +++ b/c/vendor/fmt/include/fmt/xchar.h @@ -0,0 +1,259 @@ +// Formatting library for C++ - optional wchar_t and exotic character support +// +// Copyright (c) 2012 - present, Victor Zverovich +// All rights reserved. +// +// For the license information refer to format.h. + +#ifndef FMT_XCHAR_H_ +#define FMT_XCHAR_H_ + +#include + +#include "format.h" + +#ifndef FMT_STATIC_THOUSANDS_SEPARATOR +# include +#endif + +FMT_BEGIN_NAMESPACE +namespace detail { + +template +using is_exotic_char = bool_constant::value>; + +inline auto write_loc(std::back_insert_iterator> out, + loc_value value, const format_specs& specs, + locale_ref loc) -> bool { +#ifndef FMT_STATIC_THOUSANDS_SEPARATOR + auto& numpunct = + std::use_facet>(loc.get()); + auto separator = std::wstring(); + auto grouping = numpunct.grouping(); + if (!grouping.empty()) separator = std::wstring(1, numpunct.thousands_sep()); + return value.visit(loc_writer{out, specs, separator, grouping, {}}); +#endif + return false; +} +} // namespace detail + +FMT_BEGIN_EXPORT + +using wstring_view = basic_string_view; +using wformat_parse_context = basic_format_parse_context; +using wformat_context = buffer_context; +using wformat_args = basic_format_args; +using wmemory_buffer = basic_memory_buffer; + +#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409 +// Workaround broken conversion on older gcc. +template using wformat_string = wstring_view; +inline auto runtime(wstring_view s) -> wstring_view { return s; } +#else +template +using wformat_string = basic_format_string...>; +inline auto runtime(wstring_view s) -> runtime_format_string { + return {{s}}; +} +#endif + +template <> struct is_char : std::true_type {}; +template <> struct is_char : std::true_type {}; +template <> struct is_char : std::true_type {}; +template <> struct is_char : std::true_type {}; + +template +constexpr auto make_wformat_args(const T&... args) + -> format_arg_store { + return {args...}; +} + +inline namespace literals { +#if FMT_USE_USER_DEFINED_LITERALS && !FMT_USE_NONTYPE_TEMPLATE_ARGS +constexpr auto operator""_a(const wchar_t* s, size_t) + -> detail::udl_arg { + return {s}; +} +#endif +} // namespace literals + +template +auto join(It begin, Sentinel end, wstring_view sep) + -> join_view { + return {begin, end, sep}; +} + +template +auto join(Range&& range, wstring_view sep) + -> join_view, detail::sentinel_t, + wchar_t> { + return join(std::begin(range), std::end(range), sep); +} + +template +auto join(std::initializer_list list, wstring_view sep) + -> join_view { + return join(std::begin(list), std::end(list), sep); +} + +template ::value)> +auto vformat(basic_string_view format_str, + basic_format_args>> args) + -> std::basic_string { + auto buf = basic_memory_buffer(); + detail::vformat_to(buf, format_str, args); + return to_string(buf); +} + +template +auto format(wformat_string fmt, T&&... args) -> std::wstring { + return vformat(fmt::wstring_view(fmt), fmt::make_wformat_args(args...)); +} + +// Pass char_t as a default template parameter instead of using +// std::basic_string> to reduce the symbol size. +template , + FMT_ENABLE_IF(!std::is_same::value && + !std::is_same::value)> +auto format(const S& format_str, T&&... args) -> std::basic_string { + return vformat(detail::to_string_view(format_str), + fmt::make_format_args>(args...)); +} + +template , + FMT_ENABLE_IF(detail::is_locale::value&& + detail::is_exotic_char::value)> +inline auto vformat( + const Locale& loc, const S& format_str, + basic_format_args>> args) + -> std::basic_string { + return detail::vformat(loc, detail::to_string_view(format_str), args); +} + +template , + FMT_ENABLE_IF(detail::is_locale::value&& + detail::is_exotic_char::value)> +inline auto format(const Locale& loc, const S& format_str, T&&... args) + -> std::basic_string { + return detail::vformat(loc, detail::to_string_view(format_str), + fmt::make_format_args>(args...)); +} + +template , + FMT_ENABLE_IF(detail::is_output_iterator::value&& + detail::is_exotic_char::value)> +auto vformat_to(OutputIt out, const S& format_str, + basic_format_args>> args) + -> OutputIt { + auto&& buf = detail::get_buffer(out); + detail::vformat_to(buf, detail::to_string_view(format_str), args); + return detail::get_iterator(buf, out); +} + +template , + FMT_ENABLE_IF(detail::is_output_iterator::value&& + detail::is_exotic_char::value)> +inline auto format_to(OutputIt out, const S& fmt, T&&... args) -> OutputIt { + return vformat_to(out, detail::to_string_view(fmt), + fmt::make_format_args>(args...)); +} + +template , + FMT_ENABLE_IF(detail::is_output_iterator::value&& + detail::is_locale::value&& + detail::is_exotic_char::value)> +inline auto vformat_to( + OutputIt out, const Locale& loc, const S& format_str, + basic_format_args>> args) -> OutputIt { + auto&& buf = detail::get_buffer(out); + vformat_to(buf, detail::to_string_view(format_str), args, + detail::locale_ref(loc)); + return detail::get_iterator(buf, out); +} + +template , + bool enable = detail::is_output_iterator::value && + detail::is_locale::value && + detail::is_exotic_char::value> +inline auto format_to(OutputIt out, const Locale& loc, const S& format_str, + T&&... args) -> + typename std::enable_if::type { + return vformat_to(out, loc, detail::to_string_view(format_str), + fmt::make_format_args>(args...)); +} + +template ::value&& + detail::is_exotic_char::value)> +inline auto vformat_to_n( + OutputIt out, size_t n, basic_string_view format_str, + basic_format_args>> args) + -> format_to_n_result { + using traits = detail::fixed_buffer_traits; + auto buf = detail::iterator_buffer(out, n); + detail::vformat_to(buf, format_str, args); + return {buf.out(), buf.count()}; +} + +template , + FMT_ENABLE_IF(detail::is_output_iterator::value&& + detail::is_exotic_char::value)> +inline auto format_to_n(OutputIt out, size_t n, const S& fmt, T&&... args) + -> format_to_n_result { + return vformat_to_n(out, n, detail::to_string_view(fmt), + fmt::make_format_args>(args...)); +} + +template , + FMT_ENABLE_IF(detail::is_exotic_char::value)> +inline auto formatted_size(const S& fmt, T&&... args) -> size_t { + auto buf = detail::counting_buffer(); + detail::vformat_to(buf, detail::to_string_view(fmt), + fmt::make_format_args>(args...)); + return buf.count(); +} + +inline void vprint(std::FILE* f, wstring_view fmt, wformat_args args) { + auto buf = wmemory_buffer(); + detail::vformat_to(buf, fmt, args); + buf.push_back(L'\0'); + if (std::fputws(buf.data(), f) == -1) + FMT_THROW(system_error(errno, FMT_STRING("cannot write to file"))); +} + +inline void vprint(wstring_view fmt, wformat_args args) { + vprint(stdout, fmt, args); +} + +template +void print(std::FILE* f, wformat_string fmt, T&&... args) { + return vprint(f, wstring_view(fmt), fmt::make_wformat_args(args...)); +} + +template void print(wformat_string fmt, T&&... args) { + return vprint(wstring_view(fmt), fmt::make_wformat_args(args...)); +} + +template +void println(std::FILE* f, wformat_string fmt, T&&... args) { + return print(f, L"{}\n", fmt::format(fmt, std::forward(args)...)); +} + +template void println(wformat_string fmt, T&&... args) { + return print(L"{}\n", fmt::format(fmt, std::forward(args)...)); +} + +/** + Converts *value* to ``std::wstring`` using the default format for type *T*. + */ +template inline auto to_wstring(const T& value) -> std::wstring { + return format(FMT_STRING(L"{}"), value); +} +FMT_END_EXPORT +FMT_END_NAMESPACE + +#endif // FMT_XCHAR_H_ diff --git a/c/vendor/fmt/src/fmt.cc b/c/vendor/fmt/src/fmt.cc new file mode 100644 index 0000000000..5330463a93 --- /dev/null +++ b/c/vendor/fmt/src/fmt.cc @@ -0,0 +1,108 @@ +module; + +// Put all implementation-provided headers into the global module fragment +// to prevent attachment to this module. +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#if __has_include() +# include +#endif +#if defined(_MSC_VER) || defined(__MINGW32__) +# include +#endif +#if defined __APPLE__ || defined(__FreeBSD__) +# include +#endif +#if __has_include() +# include +#endif +#if (__has_include() || defined(__APPLE__) || \ + defined(__linux__)) && \ + (!defined(WINAPI_FAMILY) || (WINAPI_FAMILY == WINAPI_FAMILY_DESKTOP_APP)) +# include +# include +# include +# ifndef _WIN32 +# include +# else +# include +# endif +#endif +#ifdef _WIN32 +# if defined(__GLIBCXX__) +# include +# include +# endif +# define WIN32_LEAN_AND_MEAN +# include +#endif + +export module fmt; + +#define FMT_EXPORT export +#define FMT_BEGIN_EXPORT export { +#define FMT_END_EXPORT } + +// If you define FMT_ATTACH_TO_GLOBAL_MODULE +// - all declarations are detached from module 'fmt' +// - the module behaves like a traditional static library, too +// - all library symbols are mangled traditionally +// - you can mix TUs with either importing or #including the {fmt} API +#ifdef FMT_ATTACH_TO_GLOBAL_MODULE +extern "C++" { +#endif + +// All library-provided declarations and definitions must be in the module +// purview to be exported. +#include "fmt/args.h" +#include "fmt/chrono.h" +#include "fmt/color.h" +#include "fmt/compile.h" +#include "fmt/format.h" +#include "fmt/os.h" +#include "fmt/printf.h" +#include "fmt/std.h" +#include "fmt/xchar.h" + +#ifdef FMT_ATTACH_TO_GLOBAL_MODULE +} +#endif + +// gcc doesn't yet implement private module fragments +#if !FMT_GCC_VERSION +module :private; +#endif + +#include "format.cc" +#include "os.cc" diff --git a/c/vendor/fmt/src/format.cc b/c/vendor/fmt/src/format.cc new file mode 100644 index 0000000000..391d3a248c --- /dev/null +++ b/c/vendor/fmt/src/format.cc @@ -0,0 +1,43 @@ +// Formatting library for C++ +// +// Copyright (c) 2012 - 2016, Victor Zverovich +// All rights reserved. +// +// For the license information refer to format.h. + +#include "fmt/format-inl.h" + +FMT_BEGIN_NAMESPACE +namespace detail { + +template FMT_API auto dragonbox::to_decimal(float x) noexcept + -> dragonbox::decimal_fp; +template FMT_API auto dragonbox::to_decimal(double x) noexcept + -> dragonbox::decimal_fp; + +#ifndef FMT_STATIC_THOUSANDS_SEPARATOR +template FMT_API locale_ref::locale_ref(const std::locale& loc); +template FMT_API auto locale_ref::get() const -> std::locale; +#endif + +// Explicit instantiations for char. + +template FMT_API auto thousands_sep_impl(locale_ref) + -> thousands_sep_result; +template FMT_API auto decimal_point_impl(locale_ref) -> char; + +template FMT_API void buffer::append(const char*, const char*); + +template FMT_API void vformat_to(buffer&, string_view, + typename vformat_args<>::type, locale_ref); + +// Explicit instantiations for wchar_t. + +template FMT_API auto thousands_sep_impl(locale_ref) + -> thousands_sep_result; +template FMT_API auto decimal_point_impl(locale_ref) -> wchar_t; + +template FMT_API void buffer::append(const wchar_t*, const wchar_t*); + +} // namespace detail +FMT_END_NAMESPACE diff --git a/c/vendor/fmt/src/os.cc b/c/vendor/fmt/src/os.cc new file mode 100644 index 0000000000..a639e78c60 --- /dev/null +++ b/c/vendor/fmt/src/os.cc @@ -0,0 +1,402 @@ +// Formatting library for C++ - optional OS-specific functionality +// +// Copyright (c) 2012 - 2016, Victor Zverovich +// All rights reserved. +// +// For the license information refer to format.h. + +// Disable bogus MSVC warnings. +#if !defined(_CRT_SECURE_NO_WARNINGS) && defined(_MSC_VER) +# define _CRT_SECURE_NO_WARNINGS +#endif + +#include "fmt/os.h" + +#include + +#if FMT_USE_FCNTL +# include +# include + +# ifdef _WRS_KERNEL // VxWorks7 kernel +# include // getpagesize +# endif + +# ifndef _WIN32 +# include +# else +# ifndef WIN32_LEAN_AND_MEAN +# define WIN32_LEAN_AND_MEAN +# endif +# include + +# ifndef S_IRUSR +# define S_IRUSR _S_IREAD +# endif +# ifndef S_IWUSR +# define S_IWUSR _S_IWRITE +# endif +# ifndef S_IRGRP +# define S_IRGRP 0 +# endif +# ifndef S_IWGRP +# define S_IWGRP 0 +# endif +# ifndef S_IROTH +# define S_IROTH 0 +# endif +# ifndef S_IWOTH +# define S_IWOTH 0 +# endif +# endif // _WIN32 +#endif // FMT_USE_FCNTL + +#ifdef _WIN32 +# include +#endif + +namespace { +#ifdef _WIN32 +// Return type of read and write functions. +using rwresult = int; + +// On Windows the count argument to read and write is unsigned, so convert +// it from size_t preventing integer overflow. +inline unsigned convert_rwcount(std::size_t count) { + return count <= UINT_MAX ? static_cast(count) : UINT_MAX; +} +#elif FMT_USE_FCNTL +// Return type of read and write functions. +using rwresult = ssize_t; + +inline std::size_t convert_rwcount(std::size_t count) { return count; } +#endif +} // namespace + +FMT_BEGIN_NAMESPACE + +#ifdef _WIN32 +namespace detail { + +class system_message { + system_message(const system_message&) = delete; + void operator=(const system_message&) = delete; + + unsigned long result_; + wchar_t* message_; + + static bool is_whitespace(wchar_t c) noexcept { + return c == L' ' || c == L'\n' || c == L'\r' || c == L'\t' || c == L'\0'; + } + + public: + explicit system_message(unsigned long error_code) + : result_(0), message_(nullptr) { + result_ = FormatMessageW( + FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | + FORMAT_MESSAGE_IGNORE_INSERTS, + nullptr, error_code, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), + reinterpret_cast(&message_), 0, nullptr); + if (result_ != 0) { + while (result_ != 0 && is_whitespace(message_[result_ - 1])) { + --result_; + } + } + } + ~system_message() { LocalFree(message_); } + explicit operator bool() const noexcept { return result_ != 0; } + operator basic_string_view() const noexcept { + return basic_string_view(message_, result_); + } +}; + +class utf8_system_category final : public std::error_category { + public: + const char* name() const noexcept override { return "system"; } + std::string message(int error_code) const override { + auto&& msg = system_message(error_code); + if (msg) { + auto utf8_message = to_utf8(); + if (utf8_message.convert(msg)) { + return utf8_message.str(); + } + } + return "unknown error"; + } +}; + +} // namespace detail + +FMT_API const std::error_category& system_category() noexcept { + static const detail::utf8_system_category category; + return category; +} + +std::system_error vwindows_error(int err_code, string_view format_str, + format_args args) { + auto ec = std::error_code(err_code, system_category()); + return std::system_error(ec, vformat(format_str, args)); +} + +void detail::format_windows_error(detail::buffer& out, int error_code, + const char* message) noexcept { + FMT_TRY { + auto&& msg = system_message(error_code); + if (msg) { + auto utf8_message = to_utf8(); + if (utf8_message.convert(msg)) { + fmt::format_to(appender(out), FMT_STRING("{}: {}"), message, + string_view(utf8_message)); + return; + } + } + } + FMT_CATCH(...) {} + format_error_code(out, error_code, message); +} + +void report_windows_error(int error_code, const char* message) noexcept { + report_error(detail::format_windows_error, error_code, message); +} +#endif // _WIN32 + +buffered_file::~buffered_file() noexcept { + if (file_ && FMT_SYSTEM(fclose(file_)) != 0) + report_system_error(errno, "cannot close file"); +} + +buffered_file::buffered_file(cstring_view filename, cstring_view mode) { + FMT_RETRY_VAL(file_, FMT_SYSTEM(fopen(filename.c_str(), mode.c_str())), + nullptr); + if (!file_) + FMT_THROW(system_error(errno, FMT_STRING("cannot open file {}"), + filename.c_str())); +} + +void buffered_file::close() { + if (!file_) return; + int result = FMT_SYSTEM(fclose(file_)); + file_ = nullptr; + if (result != 0) + FMT_THROW(system_error(errno, FMT_STRING("cannot close file"))); +} + +int buffered_file::descriptor() const { +#if !defined(fileno) + int fd = FMT_POSIX_CALL(fileno(file_)); +#elif defined(FMT_HAS_SYSTEM) + // fileno is a macro on OpenBSD so we cannot use FMT_POSIX_CALL. +# define FMT_DISABLE_MACRO + int fd = FMT_SYSTEM(fileno FMT_DISABLE_MACRO(file_)); +#else + int fd = fileno(file_); +#endif + if (fd == -1) + FMT_THROW(system_error(errno, FMT_STRING("cannot get file descriptor"))); + return fd; +} + +#if FMT_USE_FCNTL +# ifdef _WIN32 +using mode_t = int; +# endif +constexpr mode_t default_open_mode = + S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH; + +file::file(cstring_view path, int oflag) { +# if defined(_WIN32) && !defined(__MINGW32__) + fd_ = -1; + auto converted = detail::utf8_to_utf16(string_view(path.c_str())); + *this = file::open_windows_file(converted.c_str(), oflag); +# else + FMT_RETRY(fd_, FMT_POSIX_CALL(open(path.c_str(), oflag, default_open_mode))); + if (fd_ == -1) + FMT_THROW( + system_error(errno, FMT_STRING("cannot open file {}"), path.c_str())); +# endif +} + +file::~file() noexcept { + // Don't retry close in case of EINTR! + // See http://linux.derkeiler.com/Mailing-Lists/Kernel/2005-09/3000.html + if (fd_ != -1 && FMT_POSIX_CALL(close(fd_)) != 0) + report_system_error(errno, "cannot close file"); +} + +void file::close() { + if (fd_ == -1) return; + // Don't retry close in case of EINTR! + // See http://linux.derkeiler.com/Mailing-Lists/Kernel/2005-09/3000.html + int result = FMT_POSIX_CALL(close(fd_)); + fd_ = -1; + if (result != 0) + FMT_THROW(system_error(errno, FMT_STRING("cannot close file"))); +} + +long long file::size() const { +# ifdef _WIN32 + // Use GetFileSize instead of GetFileSizeEx for the case when _WIN32_WINNT + // is less than 0x0500 as is the case with some default MinGW builds. + // Both functions support large file sizes. + DWORD size_upper = 0; + HANDLE handle = reinterpret_cast(_get_osfhandle(fd_)); + DWORD size_lower = FMT_SYSTEM(GetFileSize(handle, &size_upper)); + if (size_lower == INVALID_FILE_SIZE) { + DWORD error = GetLastError(); + if (error != NO_ERROR) + FMT_THROW(windows_error(GetLastError(), "cannot get file size")); + } + unsigned long long long_size = size_upper; + return (long_size << sizeof(DWORD) * CHAR_BIT) | size_lower; +# else + using Stat = struct stat; + Stat file_stat = Stat(); + if (FMT_POSIX_CALL(fstat(fd_, &file_stat)) == -1) + FMT_THROW(system_error(errno, FMT_STRING("cannot get file attributes"))); + static_assert(sizeof(long long) >= sizeof(file_stat.st_size), + "return type of file::size is not large enough"); + return file_stat.st_size; +# endif +} + +std::size_t file::read(void* buffer, std::size_t count) { + rwresult result = 0; + FMT_RETRY(result, FMT_POSIX_CALL(read(fd_, buffer, convert_rwcount(count)))); + if (result < 0) + FMT_THROW(system_error(errno, FMT_STRING("cannot read from file"))); + return detail::to_unsigned(result); +} + +std::size_t file::write(const void* buffer, std::size_t count) { + rwresult result = 0; + FMT_RETRY(result, FMT_POSIX_CALL(write(fd_, buffer, convert_rwcount(count)))); + if (result < 0) + FMT_THROW(system_error(errno, FMT_STRING("cannot write to file"))); + return detail::to_unsigned(result); +} + +file file::dup(int fd) { + // Don't retry as dup doesn't return EINTR. + // http://pubs.opengroup.org/onlinepubs/009695399/functions/dup.html + int new_fd = FMT_POSIX_CALL(dup(fd)); + if (new_fd == -1) + FMT_THROW(system_error( + errno, FMT_STRING("cannot duplicate file descriptor {}"), fd)); + return file(new_fd); +} + +void file::dup2(int fd) { + int result = 0; + FMT_RETRY(result, FMT_POSIX_CALL(dup2(fd_, fd))); + if (result == -1) { + FMT_THROW(system_error( + errno, FMT_STRING("cannot duplicate file descriptor {} to {}"), fd_, + fd)); + } +} + +void file::dup2(int fd, std::error_code& ec) noexcept { + int result = 0; + FMT_RETRY(result, FMT_POSIX_CALL(dup2(fd_, fd))); + if (result == -1) ec = std::error_code(errno, std::generic_category()); +} + +void file::pipe(file& read_end, file& write_end) { + // Close the descriptors first to make sure that assignments don't throw + // and there are no leaks. + read_end.close(); + write_end.close(); + int fds[2] = {}; +# ifdef _WIN32 + // Make the default pipe capacity same as on Linux 2.6.11+. + enum { DEFAULT_CAPACITY = 65536 }; + int result = FMT_POSIX_CALL(pipe(fds, DEFAULT_CAPACITY, _O_BINARY)); +# else + // Don't retry as the pipe function doesn't return EINTR. + // http://pubs.opengroup.org/onlinepubs/009696799/functions/pipe.html + int result = FMT_POSIX_CALL(pipe(fds)); +# endif + if (result != 0) + FMT_THROW(system_error(errno, FMT_STRING("cannot create pipe"))); + // The following assignments don't throw because read_fd and write_fd + // are closed. + read_end = file(fds[0]); + write_end = file(fds[1]); +} + +buffered_file file::fdopen(const char* mode) { +// Don't retry as fdopen doesn't return EINTR. +# if defined(__MINGW32__) && defined(_POSIX_) + FILE* f = ::fdopen(fd_, mode); +# else + FILE* f = FMT_POSIX_CALL(fdopen(fd_, mode)); +# endif + if (!f) { + FMT_THROW(system_error( + errno, FMT_STRING("cannot associate stream with file descriptor"))); + } + buffered_file bf(f); + fd_ = -1; + return bf; +} + +# if defined(_WIN32) && !defined(__MINGW32__) +file file::open_windows_file(wcstring_view path, int oflag) { + int fd = -1; + auto err = _wsopen_s(&fd, path.c_str(), oflag, _SH_DENYNO, default_open_mode); + if (fd == -1) { + FMT_THROW(system_error(err, FMT_STRING("cannot open file {}"), + detail::to_utf8(path.c_str()).c_str())); + } + return file(fd); +} +# endif + +# if !defined(__MSDOS__) +long getpagesize() { +# ifdef _WIN32 + SYSTEM_INFO si; + GetSystemInfo(&si); + return si.dwPageSize; +# else +# ifdef _WRS_KERNEL + long size = FMT_POSIX_CALL(getpagesize()); +# else + long size = FMT_POSIX_CALL(sysconf(_SC_PAGESIZE)); +# endif + + if (size < 0) + FMT_THROW(system_error(errno, FMT_STRING("cannot get memory page size"))); + return size; +# endif +} +# endif + +namespace detail { + +void file_buffer::grow(size_t) { + if (this->size() == this->capacity()) flush(); +} + +file_buffer::file_buffer(cstring_view path, + const detail::ostream_params& params) + : file_(path, params.oflag) { + set(new char[params.buffer_size], params.buffer_size); +} + +file_buffer::file_buffer(file_buffer&& other) + : detail::buffer(other.data(), other.size(), other.capacity()), + file_(std::move(other.file_)) { + other.clear(); + other.set(nullptr, 0); +} + +file_buffer::~file_buffer() { + flush(); + delete[] data(); +} +} // namespace detail + +ostream::~ostream() = default; +#endif // FMT_USE_FCNTL +FMT_END_NAMESPACE diff --git a/c/vendor/fmt/support/cmake/FindSetEnv.cmake b/c/vendor/fmt/support/cmake/FindSetEnv.cmake new file mode 100644 index 0000000000..4e2da5408a --- /dev/null +++ b/c/vendor/fmt/support/cmake/FindSetEnv.cmake @@ -0,0 +1,7 @@ +# A CMake script to find SetEnv.cmd. + +find_program(WINSDK_SETENV NAMES SetEnv.cmd + PATHS "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Microsoft SDKs\\Windows;CurrentInstallFolder]/bin") +if (WINSDK_SETENV AND PRINT_PATH) + execute_process(COMMAND ${CMAKE_COMMAND} -E echo "${WINSDK_SETENV}") +endif () diff --git a/c/vendor/fmt/support/cmake/JoinPaths.cmake b/c/vendor/fmt/support/cmake/JoinPaths.cmake new file mode 100644 index 0000000000..32d6d6685c --- /dev/null +++ b/c/vendor/fmt/support/cmake/JoinPaths.cmake @@ -0,0 +1,26 @@ +# This module provides function for joining paths +# known from from most languages +# +# Original license: +# SPDX-License-Identifier: (MIT OR CC0-1.0) +# Explicit permission given to distribute this module under +# the terms of the project as described in /LICENSE.rst. +# Copyright 2020 Jan Tojnar +# https://github.com/jtojnar/cmake-snips +# +# Modelled after Python’s os.path.join +# https://docs.python.org/3.7/library/os.path.html#os.path.join +# Windows not supported +function(join_paths joined_path first_path_segment) + set(temp_path "${first_path_segment}") + foreach(current_segment IN LISTS ARGN) + if(NOT ("${current_segment}" STREQUAL "")) + if(IS_ABSOLUTE "${current_segment}") + set(temp_path "${current_segment}") + else() + set(temp_path "${temp_path}/${current_segment}") + endif() + endif() + endforeach() + set(${joined_path} "${temp_path}" PARENT_SCOPE) +endfunction() diff --git a/c/vendor/fmt/support/cmake/fmt-config.cmake.in b/c/vendor/fmt/support/cmake/fmt-config.cmake.in new file mode 100644 index 0000000000..bc1684f245 --- /dev/null +++ b/c/vendor/fmt/support/cmake/fmt-config.cmake.in @@ -0,0 +1,7 @@ +@PACKAGE_INIT@ + +if (NOT TARGET fmt::fmt) + include(${CMAKE_CURRENT_LIST_DIR}/@targets_export_name@.cmake) +endif () + +check_required_components(fmt) diff --git a/c/vendor/fmt/support/cmake/fmt.pc.in b/c/vendor/fmt/support/cmake/fmt.pc.in new file mode 100644 index 0000000000..29976a8af0 --- /dev/null +++ b/c/vendor/fmt/support/cmake/fmt.pc.in @@ -0,0 +1,11 @@ +prefix=@CMAKE_INSTALL_PREFIX@ +exec_prefix=@CMAKE_INSTALL_PREFIX@ +libdir=@libdir_for_pc_file@ +includedir=@includedir_for_pc_file@ + +Name: fmt +Description: A modern formatting library +Version: @FMT_VERSION@ +Libs: -L${libdir} -l@FMT_LIB_NAME@ +Cflags: -I${includedir} + diff --git a/c/vendor/vendor_fmt.sh b/c/vendor/vendor_fmt.sh new file mode 100755 index 0000000000..e6dd22b8cd --- /dev/null +++ b/c/vendor/vendor_fmt.sh @@ -0,0 +1,28 @@ +#!/bin/bash +# Licensed to the Apache Software Foundation (ASF) under one +# or more contributor license agreements. See the NOTICE file +# distributed with this work for additional information +# regarding copyright ownership. The ASF licenses this file +# to you under the Apache License, Version 2.0 (the +# "License"); you may not use this file except in compliance +# with the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, +# software distributed under the License is distributed on an +# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +# KIND, either express or implied. See the License for the +# specific language governing permissions and limitations +# under the License. + +# Check for updates: https://fmt.dev/latest/index.html +rm -rf fmt +curl -L https://github.com/fmtlib/fmt/releases/download/10.2.1/fmt-10.2.1.zip -o fmt.zip +unzip fmt.zip -d . +rm fmt.zip +mv fmt-* fmt +rm -rf fmt/doc fmt/test +rm -rf fmt/support/bazel fmt/support/rtd +rm -rf fmt/support/C++.sublime-syntax fmt/support/README fmt/support/Vagrantfile +rm -rf fmt/support/*.gradle fmt/support/*.mk fmt/support/*.py fmt/support/*.xml diff --git a/dev/release/rat_exclude_files.txt b/dev/release/rat_exclude_files.txt index eff896ed83..3dbb682a09 100644 --- a/dev/release/rat_exclude_files.txt +++ b/dev/release/rat_exclude_files.txt @@ -1,6 +1,7 @@ *.json *.Rproj *.Rd +c/vendor/fmt/* c/vendor/sqlite3/sqlite3.c c/vendor/sqlite3/sqlite3.h c/vendor/portable-snippets/safe-math.h diff --git a/license.tpl b/license.tpl index 5f0a29efe5..b5943f23af 100644 --- a/license.tpl +++ b/license.tpl @@ -246,6 +246,32 @@ All rights reserved. -------------------------------------------------------------------------------- +3rdparty dependency {fmt} is statically linked in certain binary +distributions, like the Python wheels. {fmt} is under the MIT license: + +Copyright (c) 2012 - present, Victor Zverovich and {fmt} contributors + +Permission is hereby granted, free of charge, to any person obtaining +a copy of this software and associated documentation files (the +"Software"), to deal in the Software without restriction, including +without limitation the rights to use, copy, modify, merge, publish, +distribute, sublicense, and/or sell copies of the Software, and to +permit persons to whom the Software is furnished to do so, subject to +the following conditions: + +The above copyright notice and this permission notice shall be +included in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE +LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION +OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION +WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + +-------------------------------------------------------------------------------- + 3rdparty dependency Go is statically linked in certain binary distributions, like the Python wheels. The Go project is under the BSD 3-clause license + PATENTS weak patent termination clause