// String based streams -*- C++ -*-
-// Copyright (C) 1997, 1998, 1999, 2001, 2002, 2003
+// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
+// 2006, 2007, 2009
// 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)
+// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// 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.
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
-// As a special exception, you may use this file as part of a free software
-// library without restriction. Specifically, if other files instantiate
-// templates or use macros or inline functions from this file, or you compile
-// this file and link it with other files to produce an executable, this
-// file does not by itself cause the resulting executable to be covered by
-// the GNU General Public License. This exception does not however
-// invalidate any other reasons why the executable file might be covered by
-// the GNU General Public License.
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+// <http://www.gnu.org/licenses/>.
+
+/** @file sstream.tcc
+ * This is an internal header file, included by other library headers.
+ * You should not attempt to use it directly.
+ */
//
// ISO C++ 14882: 27.7 String-based streams
#pragma GCC system_header
-#include <sstream>
+_GLIBCXX_BEGIN_NAMESPACE(std)
-namespace std
-{
template <class _CharT, class _Traits, class _Alloc>
typename basic_stringbuf<_CharT, _Traits, _Alloc>::int_type
basic_stringbuf<_CharT, _Traits, _Alloc>::
pbackfail(int_type __c)
{
int_type __ret = traits_type::eof();
- const bool __testeof = traits_type::eq_int_type(__c, __ret);
-
if (this->eback() < this->gptr())
{
- const bool __testeq = traits_type::eq(traits_type::to_char_type(__c),
- this->gptr()[-1]);
- this->gbump(-1);
-
// Try to put back __c into input sequence in one of three ways.
// Order these tests done in is unspecified by the standard.
- if (!__testeof && __testeq)
- __ret = __c;
- else if (__testeof)
- __ret = traits_type::not_eof(__c);
+ const bool __testeof = traits_type::eq_int_type(__c, __ret);
+ if (!__testeof)
+ {
+ const bool __testeq = traits_type::eq(traits_type::
+ to_char_type(__c),
+ this->gptr()[-1]);
+ const bool __testout = this->_M_mode & ios_base::out;
+ if (__testeq || __testout)
+ {
+ this->gbump(-1);
+ if (!__testeq)
+ *this->gptr() = traits_type::to_char_type(__c);
+ __ret = __c;
+ }
+ }
else
{
- *this->gptr() = traits_type::to_char_type(__c);
- __ret = __c;
+ this->gbump(-1);
+ __ret = traits_type::not_eof(__c);
}
}
return __ret;
// Try to append __c into output sequence in one of two ways.
// Order these tests done in is unspecified by the standard.
+ const char_type __conv = traits_type::to_char_type(__c);
if (!__testput)
{
- // NB: Start ostringstream buffers at 512 chars. This is an
+ // NB: Start ostringstream buffers at 512 chars. This is an
// experimental value (pronounced "arbitrary" in some of the
- // hipper english-speaking countries), and can be changed to
+ // hipper English-speaking countries), and can be changed to
// suit particular needs.
- // Then, in virtue of DR 169 (TC) we are allowed to grow more
- // than one char.
+ //
+ // _GLIBCXX_RESOLVE_LIB_DEFECTS
+ // 169. Bad efficiency of overflow() mandated
+ // 432. stringbuf::overflow() makes only one write position
+ // available
const __size_type __opt_len = std::max(__size_type(2 * __capacity),
__size_type(512));
const __size_type __len = std::min(__opt_len, __max_size);
__string_type __tmp;
__tmp.reserve(__len);
- __tmp.assign(_M_string.data(), this->epptr() - this->pbase());
+ if (this->pbase())
+ __tmp.assign(this->pbase(), this->epptr() - this->pbase());
+ __tmp.push_back(__conv);
_M_string.swap(__tmp);
_M_sync(const_cast<char_type*>(_M_string.data()),
this->gptr() - this->eback(), this->pptr() - this->pbase());
}
- return this->sputc(traits_type::to_char_type(__c));
+ else
+ *this->pptr() = __conv;
+ this->pbump(1);
+ return __c;
}
template <class _CharT, class _Traits, class _Alloc>
{
// Update egptr() to match the actual string end.
_M_update_egptr();
+
if (this->gptr() < this->egptr())
__ret = traits_type::to_int_type(*this->gptr());
}
__testin &= !(__mode & ios_base::out);
__testout &= !(__mode & ios_base::in);
- if (_M_string.capacity() && (__testin || __testout || __testboth))
+ // _GLIBCXX_RESOLVE_LIB_DEFECTS
+ // 453. basic_stringbuf::seekoff need not always fail for an empty stream.
+ const char_type* __beg = __testin ? this->eback() : this->pbase();
+ if ((__beg || !__off) && (__testin || __testout || __testboth))
{
- char_type* __beg = __testin ? this->eback() : this->pbase();
-
_M_update_egptr();
- off_type __newoffi = 0;
- off_type __newoffo = 0;
+ off_type __newoffi = __off;
+ off_type __newoffo = __newoffi;
if (__way == ios_base::cur)
{
- __newoffi = this->gptr() - __beg;
- __newoffo = this->pptr() - __beg;
+ __newoffi += this->gptr() - __beg;
+ __newoffo += this->pptr() - __beg;
}
else if (__way == ios_base::end)
- __newoffo = __newoffi = this->egptr() - __beg;
+ __newoffo = __newoffi += this->egptr() - __beg;
if ((__testin || __testboth)
- && __newoffi + __off >= 0
- && this->egptr() - __beg >= __newoffi + __off)
+ && __newoffi >= 0
+ && this->egptr() - __beg >= __newoffi)
{
- this->gbump((__beg + __newoffi + __off) - this->gptr());
+ this->gbump((__beg + __newoffi) - this->gptr());
__ret = pos_type(__newoffi);
}
if ((__testout || __testboth)
- && __newoffo + __off >= 0
- && this->egptr() - __beg >= __newoffo + __off)
+ && __newoffo >= 0
+ && this->egptr() - __beg >= __newoffo)
{
- this->pbump((__beg + __newoffo + __off) - this->pptr());
+ this->pbump((__beg + __newoffo) - this->pptr());
__ret = pos_type(__newoffo);
}
}
seekpos(pos_type __sp, ios_base::openmode __mode)
{
pos_type __ret = pos_type(off_type(-1));
- if (_M_string.capacity())
- {
- off_type __pos (__sp);
- const bool __testin = (ios_base::in & this->_M_mode & __mode) != 0;
- const bool __testout = (ios_base::out & this->_M_mode & __mode) != 0;
- char_type* __beg = __testin ? this->eback() : this->pbase();
+ const bool __testin = (ios_base::in & this->_M_mode & __mode) != 0;
+ const bool __testout = (ios_base::out & this->_M_mode & __mode) != 0;
+ const char_type* __beg = __testin ? this->eback() : this->pbase();
+ if ((__beg || !off_type(__sp)) && (__testin || __testout))
+ {
_M_update_egptr();
- const bool __testpos = 0 <= __pos
- && __pos <= this->egptr() - __beg;
- if ((__testin || __testout) && __testpos)
+ const off_type __pos(__sp);
+ const bool __testpos = (0 <= __pos
+ && __pos <= this->egptr() - __beg);
+ if (__testpos)
{
if (__testin)
this->gbump((__beg + __pos) - this->gptr());
if (__testout)
this->pbump((__beg + __pos) - this->pptr());
- __ret = pos_type(off_type(__pos));
+ __ret = __sp;
}
}
return __ret;
}
+ template <class _CharT, class _Traits, class _Alloc>
+ void
+ basic_stringbuf<_CharT, _Traits, _Alloc>::
+ _M_sync(char_type* __base, __size_type __i, __size_type __o)
+ {
+ const bool __testin = _M_mode & ios_base::in;
+ const bool __testout = _M_mode & ios_base::out;
+ char_type* __endg = __base + _M_string.size();
+ char_type* __endp = __base + _M_string.capacity();
+
+ if (__base != _M_string.data())
+ {
+ // setbuf: __i == size of buffer area (_M_string.size() == 0).
+ __endg += __i;
+ __i = 0;
+ __endp = __endg;
+ }
+
+ if (__testin)
+ this->setg(__base, __base + __i, __endg);
+ if (__testout)
+ {
+ this->setp(__base, __endp);
+ this->pbump(__o);
+ // egptr() always tracks the string end. When !__testin,
+ // for the correct functioning of the streambuf inlines
+ // the other get area pointers are identical.
+ if (!__testin)
+ this->setg(__endg, __endg, __endg);
+ }
+ }
+
// Inhibit implicit instantiations for required instantiations,
// which are defined via explicit instantiations elsewhere.
// NB: This syntax is a GNU extension.
extern template class basic_stringstream<wchar_t>;
#endif
#endif
-} // namespace std
+
+_GLIBCXX_END_NAMESPACE
#endif
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