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f9c9d254cf
This patch fixes test failures that occur on Windows because the tests attempt to generate two distinct temp file names but get the same name both time. The fix for this is to create the first temp file before requesting a second temporary file name. This ensures that the second name will be unique. git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@302382 91177308-0d34-0410-b5e6-96231b3b80d8
94 lines
2.7 KiB
C++
94 lines
2.7 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <fstream>
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// template <class charT, class traits = char_traits<charT> >
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// class basic_fstream
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// template <class charT, class traits>
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// void swap(basic_fstream<charT, traits>& x, basic_fstream<charT, traits>& y);
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#include <fstream>
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#include <utility>
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#include <cassert>
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#include "platform_support.h"
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std::pair<std::string, std::string> get_temp_file_names() {
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std::pair<std::string, std::string> names;
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names.first = get_temp_file_name();
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// Create the file so the next call to `get_temp_file_name()` doesn't
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// return the same file.
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std::FILE *fd1 = std::fopen(names.first.c_str(), "w");
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names.second = get_temp_file_name();
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assert(names.first != names.second);
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std::fclose(fd1);
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std::remove(names.first.c_str());
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return names;
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}
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int main()
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{
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std::pair<std::string, std::string> temp_files = get_temp_file_names();
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std::string& temp1 = temp_files.first;
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std::string& temp2 = temp_files.second;
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assert(temp1 != temp2);
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{
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std::fstream fs1(temp1.c_str(), std::ios_base::in | std::ios_base::out
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| std::ios_base::trunc);
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std::fstream fs2(temp2.c_str(), std::ios_base::in | std::ios_base::out
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| std::ios_base::trunc);
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fs1 << 1 << ' ' << 2;
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fs2 << 2 << ' ' << 1;
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fs1.seekg(0);
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swap(fs1, fs2);
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fs1.seekg(0);
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int i;
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fs1 >> i;
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assert(i == 2);
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fs1 >> i;
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assert(i == 1);
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i = 0;
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fs2 >> i;
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assert(i == 1);
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fs2 >> i;
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assert(i == 2);
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}
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std::remove(temp1.c_str());
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std::remove(temp2.c_str());
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{
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std::wfstream fs1(temp1.c_str(), std::ios_base::in | std::ios_base::out
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| std::ios_base::trunc);
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std::wfstream fs2(temp2.c_str(), std::ios_base::in | std::ios_base::out
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| std::ios_base::trunc);
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fs1 << 1 << ' ' << 2;
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fs2 << 2 << ' ' << 1;
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fs1.seekg(0);
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swap(fs1, fs2);
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fs1.seekg(0);
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int i;
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fs1 >> i;
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assert(i == 2);
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fs1 >> i;
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assert(i == 1);
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i = 0;
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fs2 >> i;
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assert(i == 1);
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fs2 >> i;
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assert(i == 2);
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}
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std::remove(temp1.c_str());
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std::remove(temp2.c_str());
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}
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