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Merge pull request #820 from ApexAI/iox-#33-implement-uds-with-named-…
…pipes Iox #33 implement uds with named pipes
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132
iceoryx_hoofs/include/iceoryx_hoofs/internal/cxx/helplets.inl
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,132 @@ | ||
| // Copyright (c) 2021 by Apex.AI Inc. All rights reserved. | ||
| // | ||
| // Licensed 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. | ||
| // | ||
| // SPDX-License-Identifier: Apache-2.0 | ||
| #ifndef IOX_HOOFS_CXX_HELPLETS_INL | ||
| #define IOX_HOOFS_CXX_HELPLETS_INL | ||
|
|
||
| namespace iox | ||
| { | ||
| namespace cxx | ||
| { | ||
| template <uint64_t StringCapacity> | ||
| inline bool isValidFileName(const string<StringCapacity>& name) noexcept | ||
| { | ||
| if (name.empty()) | ||
| { | ||
| return false; | ||
| } | ||
|
|
||
| uint64_t nameSize = name.size(); | ||
|
|
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| const string<StringCapacity> currentDirectory("."); | ||
| const string<StringCapacity> parentDirectory(".."); | ||
|
|
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| if (name == currentDirectory || name == parentDirectory) | ||
| { | ||
| return false; | ||
| } | ||
|
|
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| // dot at the end is invalid to be compatible with windows api | ||
| const char lastCharacter = name.c_str()[nameSize - 1U]; | ||
| if (lastCharacter == '.') | ||
| { | ||
| return false; | ||
| } | ||
|
|
||
| // check if the file contains only valid characters | ||
| for (uint64_t i = 0; i < nameSize; ++i) | ||
| { | ||
| const char c = name.c_str()[i]; | ||
| if (!((internal::ASCII_A <= c && c <= internal::ASCII_Z) | ||
| || (internal::ASCII_CAPITAL_A <= c && c <= internal::ASCII_CAPITAL_Z) | ||
| || (internal::ASCII_0 <= c && c <= internal::ASCII_9) || c == internal::ASCII_MINUS | ||
| || c == internal::ASCII_DOT || c == internal::ASCII_COLON || c == internal::ASCII_UNDERSCORE)) | ||
| { | ||
| return false; | ||
| } | ||
| } | ||
|
|
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| return true; | ||
| } | ||
|
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| template <uint64_t StringCapacity> | ||
| inline bool isValidFilePath(const string<StringCapacity>& name) noexcept | ||
| { | ||
| if (name.empty()) | ||
| { | ||
| return false; | ||
| } | ||
|
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| uint64_t nameSize = name.size(); | ||
|
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| // a file path ends with the filename and not the path separator, only a | ||
| // directory can end with a path separator | ||
| auto numberOfPathSeparators = strlen(platform::IOX_PATH_SEPARATORS); | ||
| for (uint64_t i = 0; i < numberOfPathSeparators; ++i) | ||
| { | ||
| const char lastCharacter = name.c_str()[nameSize - 1U]; | ||
| if (lastCharacter == platform::IOX_PATH_SEPARATORS[i]) | ||
| { | ||
| return false; | ||
| } | ||
| } | ||
|
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| auto temp = name; | ||
|
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| const string<StringCapacity> currentDirectory("."); | ||
| const string<StringCapacity> parentDirectory(".."); | ||
|
|
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| while (!temp.empty()) | ||
| { | ||
| auto separatorPosition = temp.find_first_of(platform::IOX_PATH_SEPARATORS); | ||
|
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| // multiple slashes are explicitly allowed. the following paths | ||
| // are equivalent: | ||
| // /some/fuu/bar | ||
| // //some///fuu////bar | ||
| if (separatorPosition && *separatorPosition == 0) | ||
| { | ||
| temp = *temp.substr(*separatorPosition + 1); | ||
| continue; | ||
| } | ||
|
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| // verify if the entry between two path separators is a valid directory | ||
| // name, e.g. either it has the relative component . or .. or conforms | ||
| // with a valid file name | ||
| if (separatorPosition) | ||
| { | ||
| auto filenameToVerify = temp.substr(0, *separatorPosition); | ||
| bool isValidDirectory = isValidFileName(*filenameToVerify) || *filenameToVerify == currentDirectory | ||
| || *filenameToVerify == parentDirectory; | ||
| if (!isValidDirectory) | ||
| { | ||
| return false; | ||
| } | ||
|
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| temp = *temp.substr(*separatorPosition + 1); | ||
| } | ||
| // we reached the last entry, if its a valid file name the path is valid | ||
| else if (!separatorPosition) | ||
| { | ||
| return isValidFileName(temp); | ||
| } | ||
| } | ||
|
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| return false; | ||
| } | ||
| } // namespace cxx | ||
| } // namespace iox | ||
|
|
||
| #endif |
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