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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// <fstream>
// basic_filebuf<charT,traits>* close();
#include <fstream>
#include <cassert>
#if defined(__unix__)
#include <fcntl.h>
#include <unistd.h>
#endif
#include "test_macros.h"
#include "platform_support.h"
int main(int, char**)
{
std::string temp = get_temp_file_name();
{
std::filebuf f;
assert(!f.is_open());
assert(f.open(temp.c_str(), std::ios_base::out) != 0);
assert(f.is_open());
assert(f.close() != nullptr);
assert(!f.is_open());
assert(f.close() == nullptr);
assert(!f.is_open());
}
#if defined(__unix__)
{
std::filebuf f;
assert(!f.is_open());
// Use open directly to get the file descriptor.
int fd = open(temp.c_str(), O_RDWR);
assert(fd >= 0);
// Use the internal method to create filebuf from the file descriptor.
assert(f.__open(fd, std::ios_base::out) != 0);
assert(f.is_open());
// Close the file descriptor directly to force filebuf::close to fail.
assert(close(fd) == 0);
// Ensure that filebuf::close handles the failure.
assert(f.close() == nullptr);
assert(!f.is_open());
assert(f.close() == nullptr);
}
#endif
std::remove(temp.c_str());
return 0;
}
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