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65 lines
1.8 KiB
C++
65 lines
1.8 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// <streambuf>
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// template <class charT, class traits = char_traits<charT> >
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// class basic_streambuf;
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// streamsize xsputn(const char_type* s, streamsize n);
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// Test https://bugs.llvm.org/show_bug.cgi?id=14074. The bug is really inside
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// basic_streambuf, but I can't seem to reproduce without going through one
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// of its derived classes.
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#include <cassert>
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#include <cstddef>
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#include <cstdio>
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#include <fstream>
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#include <sstream>
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#include <string>
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#include "test_macros.h"
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#include "platform_support.h"
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// Count the number of bytes in a file -- make sure to use only functionality
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// provided by the C library to avoid relying on the C++ library, which we're
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// trying to test.
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static std::size_t count_bytes(char const* filename) {
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std::FILE* f = std::fopen(filename, "rb");
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std::size_t count = 0;
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while (std::fgetc(f) != EOF)
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++count;
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std::fclose(f);
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return count;
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}
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int main(int, char**) {
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{
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// with basic_stringbuf
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std::basic_stringbuf<char> buf;
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std::streamsize sz = buf.sputn("\xFF", 1);
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assert(sz == 1);
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assert(buf.str().size() == 1);
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}
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{
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// with basic_filebuf
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std::string temp = get_temp_file_name();
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{
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std::basic_filebuf<char> buf;
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buf.open(temp.c_str(), std::ios_base::out);
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std::streamsize sz = buf.sputn("\xFF", 1);
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assert(sz == 1);
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}
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assert(count_bytes(temp.c_str()) == 1);
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std::remove(temp.c_str());
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}
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return 0;
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}
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