fmt/test/gtest-extra.cc
Elias Kosunen 691a7a91a1 Add more compilers to CI and increase FMT_PEDANTIC warning levels (#736)
* Add a _lot_ more warnings to FMT_PEDANTIC
Fix these warnings

* Add more compilers to CI
Fix (some) of the compiler errors with them

* Enable -Werror on CI
Increase warning level on MSVC when compiling with FMT_PEDANTIC

* Add VS 2013 and 2015 to Appveyor

* Fix Appveyor tests
Formatting

* Implement requested changes
Fix some of the MSVC warnings
Implement C++11 integer_sequence

* Reintroduce appveyor-build.py

* Remove ranges-test from tests

* Remove (some) explicit warning suppressions
Fix C++ standard setting in CI

* Remove (some) explicit warning suppressions
Fix C++ standard setting in CI

* Fix test builds with C++11

* Enable pedantic warnings on tests

* Fix warnings from edits to master

* Cleanups

* Add C++11 support to ranges.h
Re-enable ranges-test
Fix a Visual Studio error about function not returning a value in printf.h
Fix a bug in .travis.yml
2018-06-06 15:57:59 +02:00

91 lines
2.2 KiB
C++

// Formatting library for C++ - custom Google Test assertions
//
// Copyright (c) 2012 - present, Victor Zverovich
// All rights reserved.
//
// For the license information refer to format.h.
#include "gtest-extra.h"
#if FMT_USE_FILE_DESCRIPTORS
using fmt::file;
void OutputRedirect::flush() {
#if EOF != -1
# error "FMT_RETRY assumes return value of -1 indicating failure"
#endif
int result = 0;
FMT_RETRY(result, fflush(file_));
if (result != 0)
throw fmt::system_error(errno, "cannot flush stream");
}
void OutputRedirect::restore() {
if (original_.descriptor() == -1)
return; // Already restored.
flush();
// Restore the original file.
original_.dup2(FMT_POSIX(fileno(file_)));
original_.close();
}
OutputRedirect::OutputRedirect(FILE *f) : file_(f) {
flush();
int fd = FMT_POSIX(fileno(f));
// Create a file object referring to the original file.
original_ = file::dup(fd);
// Create a pipe.
file write_end;
file::pipe(read_end_, write_end);
// Connect the passed FILE object to the write end of the pipe.
write_end.dup2(fd);
}
OutputRedirect::~OutputRedirect() FMT_NOEXCEPT {
try {
restore();
} catch (const std::exception &e) {
std::fputs(e.what(), stderr);
}
}
std::string OutputRedirect::restore_and_read() {
// Restore output.
restore();
// Read everything from the pipe.
std::string content;
if (read_end_.descriptor() == -1)
return content; // Already read.
enum { BUFFER_SIZE = 4096 };
char buffer[BUFFER_SIZE];
std::size_t count = 0;
do {
count = read_end_.read(buffer, BUFFER_SIZE);
content.append(buffer, count);
} while (count != 0);
read_end_.close();
return content;
}
std::string read(file &f, std::size_t count) {
std::string buffer(count, '\0');
std::size_t n = 0, offset = 0;
do {
n = f.read(&buffer[offset], count - offset);
// We can't read more than size_t bytes since count has type size_t.
offset += n;
} while (offset < count && n != 0);
buffer.resize(offset);
return buffer;
}
#endif // FMT_USE_FILE_DESCRIPTORS
std::string format_system_error(int error_code, fmt::string_view message) {
fmt::memory_buffer out;
format_system_error(out, error_code, message);
return to_string(out);
}