+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.
+
2001-05-24 Gabriel Dos Reis <gdr@merlin.codesourcery.com>
* include/bits/c++config(__NO_MATH_INLINES): Move to...
} // namespace std
-#endif /* _CPP_BITS_BASICIOS_TCC */
+#endif // _CPP_BITS_BASICIOS_TCC
typedef basic_filebuf<char_type, traits_type> __filebuf_type;
typedef basic_istream<char_type, traits_type> __istream_type;
- // Constructors/Destructors:
+ private:
+ __filebuf_type _M_filebuf;
+
+ public:
+ // Constructors/Destructors:
basic_ifstream()
- : __istream_type(new __filebuf_type())
- { }
+ : __istream_type(NULL), _M_filebuf()
+ { this->init(&_M_filebuf); }
explicit
basic_ifstream(const char* __s, ios_base::openmode __mode = ios_base::in)
- : __istream_type(new __filebuf_type())
- { this->open(__s, __mode); }
-
- ~basic_ifstream()
+ : __istream_type(NULL), _M_filebuf()
{
- delete _M_streambuf;
- _M_streambuf = NULL;
+ this->init(&_M_filebuf);
+ this->open(__s, __mode);
}
+
+ ~basic_ifstream()
+ { }
// Members:
__filebuf_type*
rdbuf() const
- { return static_cast<__filebuf_type*>(_M_streambuf); }
+ { return const_cast<__filebuf_type*>(&_M_filebuf); }
bool
- is_open(void) { return rdbuf()->is_open(); }
+ is_open(void) { return _M_filebuf.is_open(); }
void
open(const char* __s, ios_base::openmode __mode = ios_base::in)
{
- if (rdbuf()->open(__s, __mode | ios_base::in) == NULL)
+ if (_M_filebuf.open(__s, __mode | ios_base::in) == NULL)
this->setstate(ios_base::failbit);
}
void
close(void)
{
- if (!rdbuf()->close())
+ if (!_M_filebuf.close())
this->setstate(ios_base::failbit);
}
};
typedef basic_filebuf<char_type, traits_type> __filebuf_type;
typedef basic_ostream<char_type, traits_type> __ostream_type;
+ private:
+ __filebuf_type _M_filebuf;
+
+ public:
// Constructors:
basic_ofstream()
- : __ostream_type(new __filebuf_type())
- { }
+ : __ostream_type(NULL), _M_filebuf()
+ { this->init(&_M_filebuf); }
explicit
basic_ofstream(const char* __s,
ios_base::openmode __mode = ios_base::out|ios_base::trunc)
- : __ostream_type(new __filebuf_type())
- { this->open(__s, __mode); }
-
- ~basic_ofstream()
+ : __ostream_type(NULL), _M_filebuf()
{
- delete _M_streambuf;
- _M_streambuf = NULL;
+ this->init(&_M_filebuf);
+ this->open(__s, __mode);
}
+ ~basic_ofstream()
+ { }
+
// Members:
__filebuf_type*
rdbuf(void) const
- { return static_cast<__filebuf_type*>(_M_streambuf); }
+ { return const_cast<__filebuf_type*>(&_M_filebuf); }
bool
- is_open(void) { return rdbuf()->is_open(); }
+ is_open(void) { return _M_filebuf.is_open(); }
void
open(const char* __s,
ios_base::openmode __mode = ios_base::out | ios_base::trunc)
{
- if (!rdbuf()->open(__s, __mode | ios_base::out))
+ if (!_M_filebuf.open(__s, __mode | ios_base::out))
this->setstate(ios_base::failbit);
}
void
close(void)
{
- if (!rdbuf()->close())
+ if (!_M_filebuf.close())
setstate(ios_base::failbit);
}
};
typedef basic_ios<char_type, traits_type> __ios_type;
typedef basic_iostream<char_type, traits_type> __iostream_type;
+ private:
+ __filebuf_type _M_filebuf;
+
+ public:
// Constructors/destructor:
basic_fstream()
- : __iostream_type(new __filebuf_type())
- { }
+ : __iostream_type(NULL), _M_filebuf()
+ { this->init(&_M_filebuf); }
explicit
basic_fstream(const char* __s,
ios_base::openmode __mode = ios_base::in | ios_base::out)
- : __iostream_type(new __filebuf_type())
- { this->open(__s, __mode); }
-
- ~basic_fstream()
+ : __iostream_type(NULL), _M_filebuf()
{
- delete _M_streambuf;
- _M_streambuf = NULL;
+ this->init(&_M_filebuf);
+ this->open(__s, __mode);
}
+
+ ~basic_fstream()
+ { }
// Members:
__filebuf_type*
rdbuf(void) const
- { return static_cast<__filebuf_type*>(_M_streambuf); }
+ { return const_cast<__filebuf_type*>(&_M_filebuf); }
bool
- is_open(void) { return rdbuf()->is_open(); }
+ is_open(void) { return _M_filebuf.is_open(); }
void
open(const char* __s,
ios_base::openmode __mode = ios_base::in | ios_base::out)
{
- if (!rdbuf()->open(__s, __mode))
- setstate (ios_base::failbit);
+ if (!_M_filebuf.open(__s, __mode))
+ setstate(ios_base::failbit);
}
void
close(void)
{
- if (!rdbuf()->close())
- setstate (ios_base::failbit);
+ if (!_M_filebuf.close())
+ setstate(ios_base::failbit);
}
};
} // namespace std
typedef basic_stringbuf<_CharT, _Traits, _Alloc> __stringbuf_type;
typedef basic_istream<char_type, traits_type> __istream_type;
+ private:
+ __stringbuf_type _M_stringbuf;
+
+ public:
// Constructors:
explicit
basic_istringstream(ios_base::openmode __mode = ios_base::in)
- : __istream_type(new __stringbuf_type(__mode | ios_base::in))
- { }
+ : __istream_type(NULL), _M_stringbuf(__mode | ios_base::in)
+ { this->init(&_M_stringbuf); }
explicit
basic_istringstream(const __string_type& __str,
ios_base::openmode __mode = ios_base::in)
- : __istream_type(new __stringbuf_type(__str, __mode | ios_base::in))
- { }
+ : __istream_type(NULL), _M_stringbuf(__str, __mode | ios_base::in)
+ { this->init(&_M_stringbuf); }
~basic_istringstream()
- {
- delete _M_streambuf;
- _M_streambuf = NULL;
- }
+ { }
// Members:
__stringbuf_type*
rdbuf() const
- { return static_cast<__stringbuf_type*>(_M_streambuf); }
+ { return const_cast<__stringbuf_type*>(&_M_stringbuf); }
__string_type
str() const
- { return this->rdbuf()->str(); }
+ { return _M_stringbuf.str(); }
void
str(const __string_type& __s)
- { rdbuf()->str(__s); }
-
+ { _M_stringbuf.str(__s); }
};
typedef basic_stringbuf<_CharT, _Traits, _Alloc> __stringbuf_type;
typedef basic_ostream<char_type, traits_type> __ostream_type;
- // Constructors/destructor:
+ private:
+ __stringbuf_type _M_stringbuf;
+
+ public:
+ // Constructors/destructor:
explicit
basic_ostringstream(ios_base::openmode __mode = ios_base::out)
- : __ostream_type(new __stringbuf_type(__mode | ios_base::out))
- { }
+ : __ostream_type(NULL), _M_stringbuf(__mode | ios_base::out)
+ { this->init(&_M_stringbuf); }
explicit
basic_ostringstream(const __string_type __str,
ios_base::openmode __mode = ios_base::out)
- : __ostream_type(new __stringbuf_type(__str, __mode | ios_base::out))
- { }
+ : __ostream_type(NULL), _M_stringbuf(__str, __mode | ios_base::out)
+ { this->init(&_M_stringbuf); }
~basic_ostringstream()
- {
- delete _M_streambuf;
- _M_streambuf = NULL;
- }
+ { }
// Members:
__stringbuf_type*
rdbuf() const
- { return static_cast<__stringbuf_type*>(_M_streambuf); }
+ { return const_cast<__stringbuf_type*>(&_M_stringbuf); }
__string_type
str() const
- { return this->rdbuf()->str(); }
+ { return _M_stringbuf.str(); }
void
str(const __string_type& __s)
- { rdbuf()->str(__s); }
-
+ { _M_stringbuf.str(__s); }
};
typedef basic_string<_CharT, _Traits, _Alloc> __string_type;
typedef basic_stringbuf<_CharT, _Traits, _Alloc> __stringbuf_type;
typedef basic_iostream<char_type, traits_type> __iostream_type;
-
+
+ private:
+ __stringbuf_type _M_stringbuf;
+
+ public:
// Constructors/destructors
explicit
- basic_stringstream(ios_base::openmode __mode =
- ios_base::out | ios_base::in)
- : __iostream_type(new __stringbuf_type(__mode))
- { }
+ basic_stringstream(ios_base::openmode __m = ios_base::out | ios_base::in)
+ : __iostream_type(NULL), _M_stringbuf(__m)
+ { this->init(&_M_stringbuf); }
explicit
basic_stringstream(const __string_type& __str,
- ios_base::openmode __mode =
- ios_base::out | ios_base::in)
- : __iostream_type(new __stringbuf_type(__str, __mode))
- { }
+ ios_base::openmode __m = ios_base::out | ios_base::in)
+ : __iostream_type(NULL), _M_stringbuf(__str, __m)
+ { this->init(&_M_stringbuf); }
~basic_stringstream()
- {
- delete _M_streambuf;
- _M_streambuf = NULL;
- }
+ { }
// Members:
__stringbuf_type*
rdbuf() const
- { return static_cast<__stringbuf_type*>(_M_streambuf); }
+ { return const_cast<__stringbuf_type*>(&_M_stringbuf); }
__string_type
str() const
- { return rdbuf()->str(); }
+ { return _M_stringbuf.str(); }
void
str(const __string_type& __s)
- { rdbuf()->str(__s); }
+ { _M_stringbuf.str(__s); }
};
-
} // namespace std
#endif
#endif
-#endif /* _CPP_SSTREAM */
+#endif // _CPP_SSTREAM
--- /dev/null
+// 2001-05-24 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.
+
+// 27.8.1.13 member functions (fstream_members)
+
+#include <fstream>
+#include <debug_assert.h>
+
+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::fstream 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()
+{
+ test02();
+ return 0;
+}
+
+
+
-// Copyright (C) 2000 Free Software Foundation, Inc.
+// 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
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;
}
+
+
+
// 2000-01-10 bkoz
-// Copyright (C) 2000 Free Software Foundation, Inc.
+// 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
// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.
-// 27.7.2 template class basic_istringstream
// 27.7.2.2 member functions (istringstream_members)
-// stringbuf* rdbuf() const
-
#include <sstream>
#include <debug_assert.h>
-
void test01()
{
bool test = true;
std::istringstream is01;
+ const std::string str00;
const std::string str01 = "123";
std::string str02;
const int i01 = 123;
std::ios_base::iostate state1, state2, statefail, stateeof;
statefail = std::ios_base::failbit;
stateeof = std::ios_base::eofbit;
-
+
+ // string str() const
+ str02 = is01.str();
+ VERIFY( str00 == str02 );
+
// void str(const basic_string&)
is01.str(str01);
+ str02 = is01.str();
+ VERIFY( str01 == str02 );
state1 = is01.rdstate();
is01 >> a;
state2 = is01.rdstate();
VERIFY( state1 != state2 );
VERIFY( state2 == stateeof );
- // string str() const
- str02 = is01.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::istringstream 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;
}
+
+
+
-// Copyright (C) 2000 Free Software Foundation, Inc.
+// 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
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::ofstream 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;
}
+
+
+
--- /dev/null
+// 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;
+}
--- /dev/null
+// 2001-05-24 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.
+
+// 27.7.6 member functions (stringstream_members)
+
+#include <sstream>
+#include <debug_assert.h>
+
+void test01()
+{
+ bool test = true;
+ std::stringstream is01;
+ 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 = is01.str();
+ VERIFY( str00 == str02 );
+
+ // void str(const basic_string&)
+ is01.str(str01);
+ str02 = is01.str();
+ VERIFY( str01 == str02 );
+ state1 = is01.rdstate();
+ is01 >> a;
+ state2 = is01.rdstate();
+ VERIFY( a = i01 );
+ // 22.2.2.1.2 num_get virtual functions
+ // p 13
+ // in any case, if stage 2 processing was terminated by the test for
+ // in == end then err != ios_base::eofbit is performed.
+ VERIFY( state1 != state2 );
+ VERIFY( state2 == stateeof );
+
+ is01.str(str01);
+ is01 >> b;
+ VERIFY( b != a );
+ // as is01.good() is false, istream::sentry blocks extraction.
+
+ is01.clear();
+ state1 = is01.rdstate();
+ is01 >> b;
+ state2 = is01.rdstate();
+ VERIFY( b == a );
+ VERIFY( state1 != state2 );
+ VERIFY( state2 == stateeof );
+
+ #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::stringstream 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;
+}
+
+
+
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