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107 lines
3.4 KiB
107 lines
3.4 KiB
/*
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* Copyright (c) 2015, Intel Corporation
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation and/or
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* other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its contributors
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* may be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <exception>
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#include <fstream>
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#include <string>
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#include <array>
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#include <cerrno>
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#include <cstring>
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namespace parameterFramework
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{
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namespace utility
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{
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/** Create a temporary file with the given content. */
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class TmpFile
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{
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public:
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TmpFile(std::string content) : mPath(mktmp())
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{
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std::ofstream file(mPath);
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file.exceptions(std::ofstream::failbit | std::ofstream::badbit);
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file << content;
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// Close explicitly to detect errors (fstream destructor does not throw)
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file.close();
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}
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TmpFile(TmpFile &&right) : mPath(std::move(right.mPath)) { right.mPath.clear(); }
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/** Forbid copy semantic as sharing the tmp file is not needed.
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* @{ */
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TmpFile(const TmpFile &right) = delete;
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TmpFile &operator=(const TmpFile &right) = delete;
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/** @} */
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TmpFile &operator=(TmpFile &&right)
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{
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remove();
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mPath = std::move(right.mPath);
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right.mPath.clear();
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return *this;
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}
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~TmpFile() { remove(); }
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/** @return the path to the temporary file.
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* "" if the file was moved from.
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*/
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const std::string &getPath() const { return mPath; }
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private:
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/** @return a valid unique file name. */
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std::string mktmp();
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/** Throw an std::runtime_error with a message constructed from the context and std::errno.
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*
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* Call it after a c standard function failure.
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*/
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static void throwErrnoError(std::string context)
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{
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auto message = context + ": (" + std::to_string(errno) + ") " + std::strerror(errno);
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throw std::runtime_error(message);
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}
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void remove()
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{
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if (not mPath.empty()) {
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if (std::remove(mPath.c_str()) != 0) {
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throwErrnoError("Could not delete tmpfile");
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}
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}
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}
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std::string mPath;
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};
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} // namespace utility
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} // namespace parameterFramework
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