mirror of
https://github.com/fmtlib/fmt.git
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99 lines
3.1 KiB
C++
99 lines
3.1 KiB
C++
/*
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Custom Google Test assertions.
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Copyright (c) 2012-2014, Victor Zverovich
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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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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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
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and/or other materials provided with the distribution.
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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 OWNER 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
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ON 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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#include "gtest-extra.h"
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#if FMT_USE_FILE_DESCRIPTORS
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using fmt::File;
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void OutputRedirect::flush() {
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#if EOF != -1
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# error "FMT_RETRY assumes return value of -1 indicating failure"
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#endif
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int result = 0;
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FMT_RETRY(result, fflush(file_));
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if (result != 0)
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throw fmt::SystemError(errno, "cannot flush stream");
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}
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void OutputRedirect::restore() {
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if (original_.descriptor() == -1)
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return; // Already restored.
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flush();
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// Restore the original file.
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original_.dup2(FMT_POSIX(fileno(file_)));
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original_.close();
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}
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OutputRedirect::OutputRedirect(FILE *file) : file_(file) {
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flush();
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int fd = FMT_POSIX(fileno(file));
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// Create a File object referring to the original file.
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original_ = File::dup(fd);
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// Create a pipe.
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File write_end;
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File::pipe(read_end_, write_end);
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// Connect the passed FILE object to the write end of the pipe.
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write_end.dup2(fd);
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}
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OutputRedirect::~OutputRedirect() FMT_NOEXCEPT {
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try {
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restore();
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} catch (const std::exception &e) {
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std::fputs(e.what(), stderr);
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}
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}
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std::string OutputRedirect::restore_and_read() {
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// Restore output.
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restore();
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// Read everything from the pipe.
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std::string content;
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if (read_end_.descriptor() == -1)
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return content; // Already read.
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enum { BUFFER_SIZE = 4096 };
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char buffer[BUFFER_SIZE];
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std::streamsize count = 0;
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do {
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count = read_end_.read(buffer, BUFFER_SIZE);
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content.append(buffer, static_cast<std::size_t>(count));
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} while (count != 0);
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read_end_.close();
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return content;
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}
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#endif // FMT_USE_FILE_DESCRIPTORS
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std::string format_system_error(int error_code, fmt::StringRef message) {
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fmt::MemoryWriter out;
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fmt::internal::format_system_error(out, error_code, message);
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return out.str();
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}
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