124 lines
3.0 KiB
C++
124 lines
3.0 KiB
C++
// Copyright (C) 2000, 2001 Free Software Foundation, Inc.
|
|
//
|
|
// This file is part of the GNU ISO C++ Library. This library is free
|
|
// software; you can redistribute it and/or modify it under the
|
|
// terms of the GNU General Public License as published by the
|
|
// Free Software Foundation; either version 2, or (at your option)
|
|
// any later version.
|
|
|
|
// This library is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
|
|
// You should have received a copy of the GNU General Public License along
|
|
// with this library; see the file COPYING. If not, write to the Free
|
|
// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
|
|
// USA.
|
|
|
|
// 27.8.1.7 ifstream member functions
|
|
// @require@ %-*.tst %-*.txt
|
|
// @diff@ %-*.tst %-*.txt
|
|
|
|
#include <istream>
|
|
#include <fstream>
|
|
#include <testsuite_hooks.h>
|
|
|
|
const char name_01[] = "ifstream_members-1.tst";
|
|
const char name_02[] = "ifstream_members-1.txt";
|
|
|
|
// http://gcc.gnu.org/ml/libstdc++/2000-06/msg00136.html
|
|
bool test00()
|
|
{
|
|
bool test = true;
|
|
std::ifstream ifs1;
|
|
ifs1.close();
|
|
|
|
// false as expected:
|
|
VERIFY( !ifs1.is_open() );
|
|
// this is now true:
|
|
VERIFY( !(ifs1) );
|
|
|
|
ifs1.open(name_01);
|
|
VERIFY( ifs1.is_open() );
|
|
// fail bit still true
|
|
VERIFY( !(ifs1) );
|
|
VERIFY( ifs1.rdstate() == std::ios_base::failbit );
|
|
|
|
ifs1.close();
|
|
|
|
#ifdef DEBUG_ASSERT
|
|
assert(test);
|
|
#endif
|
|
|
|
return test;
|
|
}
|
|
|
|
// http://gcc.gnu.org/ml/libstdc++/2000-07/msg00004.html
|
|
bool test01()
|
|
{
|
|
bool test = true;
|
|
const int more_than_max_open_files = 8200;
|
|
|
|
for(int i = 0; ++i < more_than_max_open_files;)
|
|
{
|
|
std::ifstream ifs(name_01);
|
|
VERIFY( static_cast<bool>(ifs) );
|
|
}
|
|
|
|
#ifdef DEBUG_ASSERT
|
|
assert(test);
|
|
#endif
|
|
|
|
return test;
|
|
}
|
|
|
|
void
|
|
redirect_buffer(std::ios& stream, std::streambuf* new_buf)
|
|
{ stream.rdbuf(new_buf); }
|
|
|
|
std::streambuf*
|
|
active_buffer(std::ios& stream)
|
|
{ return stream.rdbuf(); }
|
|
|
|
// libstdc++/2832
|
|
void test02()
|
|
{
|
|
bool test = true;
|
|
const char* strlit01 = "fuck war";
|
|
const char* strlit02 = "two less cars abstract riot crew, critical mass/SF";
|
|
const std::string str00;
|
|
const std::string str01(strlit01);
|
|
std::string str02;
|
|
std::filebuf fbuf;
|
|
std::streambuf* pbasebuf0 = &fbuf;
|
|
|
|
std::ifstream sstrm1;
|
|
// derived rdbuf() always returns original streambuf, even though
|
|
// it's no longer associated with the stream.
|
|
std::filebuf* const buf1 = sstrm1.rdbuf();
|
|
// base rdbuf() returns the currently associated streambuf
|
|
std::streambuf* pbasebuf1 = active_buffer(sstrm1);
|
|
redirect_buffer(sstrm1, &fbuf);
|
|
std::filebuf* const buf2 = sstrm1.rdbuf();
|
|
std::streambuf* pbasebuf2 = active_buffer(sstrm1);
|
|
VERIFY( buf1 == buf2 );
|
|
VERIFY( pbasebuf1 != pbasebuf2 );
|
|
VERIFY( pbasebuf2 == pbasebuf0 );
|
|
|
|
// How confusing and non-intuitive is this?
|
|
// These semantics are a joke, a serious defect, and incredibly lame.
|
|
}
|
|
|
|
int main()
|
|
{
|
|
test00();
|
|
test01();
|
|
|
|
test02();
|
|
return 0;
|
|
}
|
|
|
|
|
|
|