mirror of
git://gcc.gnu.org/git/gcc.git
synced 2024-12-28 00:05:41 +08:00
d422980b3f
2001-05-24 Benjamin Kosnik <bkoz@redhat.com> libstdc++/2832 * include/bits/basic_ios.tcc: Small tweak. * include/bits/std_fstream.h (ifstream): Add buffer member. Adjust ctors and dtors, and rdbuf settings. (ofstream): Same. (fstream): Same. * include/bits/std_sstream.h: Same, but for stringstream classes. * testsuite/27_io/ostringstream_members.cc: New. * testsuite/27_io/stringstream_members.cc: New. * testsuite/27_io/fstream_members.cc: New. * testsuite/27_io/ifstream_members.cc: Add test. * testsuite/27_io/istringstream_members.cc: Add test. * testsuite/27_io/ofstream_members.cc: Add test. From-SVN: r42547
106 lines
3.0 KiB
C++
106 lines
3.0 KiB
C++
// 2001-05-23 Benjamin Kosnik <bkoz@redhat.com>
|
|
|
|
// Copyright (C) 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.
|
|
|
|
// 27.7.3.2 member functions (ostringstream_members)
|
|
|
|
#include <sstream>
|
|
#include <debug_assert.h>
|
|
|
|
void test01()
|
|
{
|
|
bool test = true;
|
|
std::ostringstream os01;
|
|
const std::string str00;
|
|
const std::string str01 = "123";
|
|
std::string str02;
|
|
const int i01 = 123;
|
|
int a,b;
|
|
|
|
std::ios_base::iostate state1, state2, statefail, stateeof;
|
|
statefail = std::ios_base::failbit;
|
|
stateeof = std::ios_base::eofbit;
|
|
|
|
// string str() const
|
|
str02 = os01.str();
|
|
VERIFY( str00 == str02 );
|
|
|
|
// void str(const basic_string&)
|
|
os01.str(str01);
|
|
str02 = os01.str();
|
|
VERIFY( str01 == str02 );
|
|
|
|
#ifdef DEBUG_ASSERT
|
|
assert(test);
|
|
#endif
|
|
}
|
|
|
|
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::stringbuf sbuf(str01);
|
|
std::streambuf* pbasebuf0 = &sbuf;
|
|
|
|
std::ostringstream sstrm1;
|
|
VERIFY( sstrm1.str() == str00 );
|
|
// derived rdbuf() always returns original streambuf, even though
|
|
// it's no longer associated with the stream.
|
|
std::stringbuf* const buf1 = sstrm1.rdbuf();
|
|
// base rdbuf() returns the currently associated streambuf
|
|
std::streambuf* pbasebuf1 = active_buffer(sstrm1);
|
|
redirect_buffer(sstrm1, &sbuf);
|
|
std::stringbuf* const buf2 = sstrm1.rdbuf();
|
|
std::streambuf* pbasebuf2 = active_buffer(sstrm1);
|
|
VERIFY( buf1 == buf2 );
|
|
VERIFY( pbasebuf1 != pbasebuf2 );
|
|
VERIFY( pbasebuf2 == pbasebuf0 );
|
|
|
|
// derived rdbuf() returns the original buf, so str() doesn't change.
|
|
VERIFY( sstrm1.str() != str01 );
|
|
VERIFY( sstrm1.str() == str00 );
|
|
// however, casting the active streambuf to a stringbuf shows what's up:
|
|
std::stringbuf* psbuf = dynamic_cast<std::stringbuf*>(pbasebuf2);
|
|
str02 = psbuf->str();
|
|
VERIFY( str02 == str01 );
|
|
|
|
// How confusing and non-intuitive is this?
|
|
// These semantics are a joke, a serious defect, and incredibly lame.
|
|
}
|
|
|
|
int main()
|
|
{
|
|
test01();
|
|
test02();
|
|
return 0;
|
|
}
|