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Fix for Integer Format Check in Python SID Adapter #1632

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Apr 12, 2021
Merged

Fix for Integer Format Check in Python SID Adapter #1632

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18 changes: 16 additions & 2 deletions include/gridtools/storage/adapter/python_sid_adapter.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,7 @@
#include <array>
#include <cassert>
#include <cstdlib>
#include <cstring>
#include <memory>
#include <stdexcept>
#include <string>
Expand Down Expand Up @@ -85,10 +86,23 @@ namespace gridtools {
if (info.itemsize != sizeof(T))
throw std::domain_error("buffer has incorrect itemsize: " + std::to_string(info.itemsize) +
"; expected " + std::to_string(sizeof(T)));

using format_desc_t = pybind11::format_descriptor<std::remove_const_t<T>>;
if (info.format != format_desc_t::format())
auto expected_format = format_desc_t::format();
assert(info.format.size() == 1 && expected_format.size() == 1);
const char *int_formats = "bBhHiIlLqQnN";
const char *int_char = std::strchr(int_formats, info.format[0]);
const char *expected_int_char = std::strchr(int_formats, expected_format[0]);
if (int_char && expected_int_char) {
// just check upper/lower case for integer formats which indicates signedness (itemsize already checked)
// direct format comparison in not enough, for details see
// https://github.com/pybind/pybind11/issues/1806 and https://github.com/pybind/pybind11/issues/1908
if (std::islower(*int_char) != std::islower(*expected_int_char))
throw std::domain_error("incompatible integer formats: " + info.format + " and " + expected_format);
} else if (info.format != expected_format) {
throw std::domain_error(
"buffer has incorrect format: " + info.format + "; expected " + format_desc_t::format());
"buffer has incorrect format: " + info.format + "; expected " + expected_format);
}
return {std::move(info)};
}

Expand Down