125 lines
3.0 KiB
C++
125 lines
3.0 KiB
C++
// Copyright (C) 2000, 2001 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 2, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING. If not, write to the Free
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// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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// USA.
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// 27.8.1.10 ofstream member functions
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// @require@ %-*.tst
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// @diff@ %-*.tst %-*.txt
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#include <ostream>
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#include <fstream>
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#include <debug_assert.h>
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const char name_01[] = "ofstream_members-1.tst";
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const char name_02[] = "ofstream_members-1.txt";
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// http://gcc.gnu.org/ml/libstdc++/2000-06/msg00136.html
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bool test00()
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{
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bool test = true;
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std::ofstream ofs1;
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ofs1.close();
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// false as expected:
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VERIFY( !ofs1.is_open() );
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// this is now true:
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VERIFY( !(ofs1) );
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ofs1.open(name_02);
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VERIFY( ofs1.is_open() );
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// fail bit still true
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VERIFY( !(ofs1) );
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VERIFY( ofs1.rdstate() == std::ios_base::failbit );
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ofs1.close();
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#ifdef DEBUG_ASSERT
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assert(test);
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#endif
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return test;
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}
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// http://gcc.gnu.org/ml/libstdc++/2000-07/msg00004.html
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bool test01()
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{
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bool test = true;
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const int more_than_max_open_files = 8200;
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for(int i = 0; ++i < more_than_max_open_files;)
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{
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std::ofstream ifs(name_02);
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VERIFY( static_cast<bool>(ifs) );
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}
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#ifdef DEBUG_ASSERT
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assert(test);
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#endif
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return test;
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}
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void
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redirect_buffer(std::ios& stream, std::streambuf* new_buf)
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{ stream.rdbuf(new_buf); }
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std::streambuf*
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active_buffer(std::ios& stream)
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{ return stream.rdbuf(); }
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// libstdc++/2832
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void test02()
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{
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bool test = true;
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const char* strlit01 = "fuck war";
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const char* strlit02 = "two less cars abstract riot crew, critical mass/SF";
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const std::string str00;
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const std::string str01(strlit01);
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std::string str02;
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std::filebuf fbuf;
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std::streambuf* pbasebuf0 = &fbuf;
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std::ofstream sstrm1;
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// derived rdbuf() always returns original streambuf, even though
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// it's no longer associated with the stream.
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std::filebuf* const buf1 = sstrm1.rdbuf();
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// base rdbuf() returns the currently associated streambuf
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std::streambuf* pbasebuf1 = active_buffer(sstrm1);
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redirect_buffer(sstrm1, &fbuf);
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std::filebuf* const buf2 = sstrm1.rdbuf();
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std::streambuf* pbasebuf2 = active_buffer(sstrm1);
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VERIFY( buf1 == buf2 );
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VERIFY( pbasebuf1 != pbasebuf2 );
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VERIFY( pbasebuf2 == pbasebuf0 );
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// How confusing and non-intuitive is this?
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// These semantics are a joke, a serious defect, and incredibly lame.
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}
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int main()
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{
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test00();
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test01();
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test02();
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return 0;
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}
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