1// Copyright (C) 2000, 2001 Free Software Foundation, Inc. 2// 3// This file is part of the GNU ISO C++ Library. This library is free 4// software; you can redistribute it and/or modify it under the 5// terms of the GNU General Public License as published by the 6// Free Software Foundation; either version 2, or (at your option) 7// any later version. 8 9// This library is distributed in the hope that it will be useful, 10// but WITHOUT ANY WARRANTY; without even the implied warranty of 11// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12// GNU General Public License for more details. 13 14// You should have received a copy of the GNU General Public License along 15// with this library; see the file COPYING. If not, write to the Free 16// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, 17// USA. 18 19// 27.8.1.10 ofstream member functions 20// @require@ %-*.tst 21// @diff@ %-*.tst %-*.txt 22 23#include <ostream> 24#include <fstream> 25#include <testsuite_hooks.h> 26 27const char name_01[] = "ofstream_members-1.tst"; 28const char name_02[] = "ofstream_members-1.txt"; 29 30// http://gcc.gnu.org/ml/libstdc++/2000-06/msg00136.html 31bool test00() 32{ 33 bool test = true; 34 std::ofstream ofs1; 35 ofs1.close(); 36 37 // false as expected: 38 VERIFY( !ofs1.is_open() ); 39 // this is now true: 40 VERIFY( !(ofs1) ); 41 42 ofs1.open(name_02); 43 VERIFY( ofs1.is_open() ); 44 // fail bit still true 45 VERIFY( !(ofs1) ); 46 VERIFY( ofs1.rdstate() == std::ios_base::failbit ); 47 48 ofs1.close(); 49 50#ifdef DEBUG_ASSERT 51 assert(test); 52#endif 53 54 return test; 55} 56 57 58// http://gcc.gnu.org/ml/libstdc++/2000-07/msg00004.html 59bool test01() 60{ 61 bool test = true; 62 const int more_than_max_open_files = 8200; 63 64 for(int i = 0; ++i < more_than_max_open_files;) 65 { 66 std::ofstream ifs(name_02); 67 VERIFY( static_cast<bool>(ifs) ); 68 } 69 70#ifdef DEBUG_ASSERT 71 assert(test); 72#endif 73 74 return test; 75} 76 77void 78redirect_buffer(std::ios& stream, std::streambuf* new_buf) 79{ stream.rdbuf(new_buf); } 80 81std::streambuf* 82active_buffer(std::ios& stream) 83{ return stream.rdbuf(); } 84 85// libstdc++/2832 86void test02() 87{ 88 bool test = true; 89 const char* strlit01 = "fuck war"; 90 const char* strlit02 = "two less cars abstract riot crew, critical mass/SF"; 91 const std::string str00; 92 const std::string str01(strlit01); 93 std::string str02; 94 std::filebuf fbuf; 95 std::streambuf* pbasebuf0 = &fbuf; 96 97 std::ofstream sstrm1; 98 // derived rdbuf() always returns original streambuf, even though 99 // it's no longer associated with the stream. 100 std::filebuf* const buf1 = sstrm1.rdbuf(); 101 // base rdbuf() returns the currently associated streambuf 102 std::streambuf* pbasebuf1 = active_buffer(sstrm1); 103 redirect_buffer(sstrm1, &fbuf); 104 std::filebuf* const buf2 = sstrm1.rdbuf(); 105 std::streambuf* pbasebuf2 = active_buffer(sstrm1); 106 VERIFY( buf1 == buf2 ); 107 VERIFY( pbasebuf1 != pbasebuf2 ); 108 VERIFY( pbasebuf2 == pbasebuf0 ); 109 110 // How confusing and non-intuitive is this? 111 // These semantics are a joke, a serious defect, and incredibly lame. 112} 113 114int main() 115{ 116 test00(); 117 test01(); 118 119 test02(); 120 return 0; 121} 122 123 124 125