// 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
//
-#ifndef _CPP_BITS_SSTREAM_TCC
-#define _CPP_BITS_SSTREAM_TCC 1
+#ifndef _SSTREAM_TCC
+#define _SSTREAM_TCC 1
#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
+ typename basic_stringbuf<_CharT, _Traits, _Alloc>::int_type
basic_stringbuf<_CharT, _Traits, _Alloc>::
pbackfail(int_type __c)
{
int_type __ret = traits_type::eof();
- bool __testeof = traits_type::eq_int_type(__c, traits_type::eof());
- bool __testpos = this->_M_in_cur && this->_M_in_beg < this->_M_in_cur;
-
- // Try to put back __c into input sequence in one of three ways.
- // Order these tests done in is unspecified by the standard.
- if (__testpos)
+ if (this->eback() < this->gptr())
{
- if (traits_type::eq(traits_type::to_char_type(__c), this->gptr()[-1])
- && !__testeof)
- {
- --this->_M_in_cur;
- __ret = __c;
- }
- else if (!__testeof)
+ // Try to put back __c into input sequence in one of three ways.
+ // Order these tests done in is unspecified by the standard.
+ const bool __testeof = traits_type::eq_int_type(__c, __ret);
+ if (!__testeof)
{
- --this->_M_in_cur;
- *this->_M_in_cur = traits_type::to_char_type(__c);
- __ret = __c;
+ 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 if (__testeof)
+ else
{
- --this->_M_in_cur;
+ this->gbump(-1);
__ret = traits_type::not_eof(__c);
}
}
return __ret;
}
-
+
template <class _CharT, class _Traits, class _Alloc>
- typename basic_stringbuf<_CharT, _Traits, _Alloc>::int_type
+ typename basic_stringbuf<_CharT, _Traits, _Alloc>::int_type
basic_stringbuf<_CharT, _Traits, _Alloc>::
overflow(int_type __c)
{
- bool __testout = this->_M_mode & ios_base::out;
+ const bool __testout = this->_M_mode & ios_base::out;
if (__builtin_expect(!__testout, false))
return traits_type::eof();
- bool __testeof = traits_type::eq_int_type(__c, traits_type::eof());
+ const bool __testeof = traits_type::eq_int_type(__c, traits_type::eof());
if (__builtin_expect(__testeof, false))
return traits_type::not_eof(__c);
- // 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
- // suit particular needs.
- __size_type __len = std::max(__size_type(_M_string.capacity() + 1),
- __size_type(512));
- bool __testput = this->_M_out_cur < this->_M_out_end;
- if (__builtin_expect(!__testput && __len > _M_string.max_size(), false))
+ const __size_type __capacity = _M_string.capacity();
+ const __size_type __max_size = _M_string.max_size();
+ const bool __testput = this->pptr() < this->epptr();
+ if (__builtin_expect(!__testput && __capacity == __max_size, false))
return traits_type::eof();
// 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)
{
- // Force-allocate, re-sync.
- _M_string = this->str();
- // In virtue of DR 169 (TC) we are allowed to grow more than
- // one char. That's easy to implement thanks to the exponential
- // growth policy builtin into basic_string.
- _M_string.reserve(__len);
- _M_really_sync(const_cast<char_type*>(_M_string.data()),
- this->_M_in_cur - this->_M_in_beg,
- this->_M_out_cur - this->_M_out_beg);
+ // 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
+ // suit particular needs.
+ //
+ // _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);
+ 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>
+ typename basic_stringbuf<_CharT, _Traits, _Alloc>::int_type
+ basic_stringbuf<_CharT, _Traits, _Alloc>::
+ underflow()
+ {
+ int_type __ret = traits_type::eof();
+ const bool __testin = this->_M_mode & ios_base::in;
+ if (__testin)
+ {
+ // Update egptr() to match the actual string end.
+ _M_update_egptr();
+
+ if (this->gptr() < this->egptr())
+ __ret = traits_type::to_int_type(*this->gptr());
+ }
+ return __ret;
}
template <class _CharT, class _Traits, class _Alloc>
basic_stringbuf<_CharT, _Traits, _Alloc>::
seekoff(off_type __off, ios_base::seekdir __way, ios_base::openmode __mode)
{
- pos_type __ret = pos_type(off_type(-1));
+ pos_type __ret = pos_type(off_type(-1));
bool __testin = (ios_base::in & this->_M_mode & __mode) != 0;
bool __testout = (ios_base::out & this->_M_mode & __mode) != 0;
- bool __testboth = __testin && __testout && __way != ios_base::cur;
+ const bool __testboth = __testin && __testout && __way != ios_base::cur;
__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 = this->_M_buf;
- char_type* __curi = NULL;
- char_type* __curo = NULL;
- char_type* __endi = NULL;
- char_type* __endo = NULL;
-
- if (__testin || __testboth)
- {
- __curi = this->gptr();
- __endi = this->egptr();
- }
- if (__testout || __testboth)
- {
- __curo = this->pptr();
- // Due to the resolution of DR169, ios_base::end
- // is this->_M_out_lim, not epptr().
- __endo = this->_M_out_lim;
- }
+ _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 = __curi - __beg;
- __newoffo = __curo - __beg;
+ __newoffi += this->gptr() - __beg;
+ __newoffo += this->pptr() - __beg;
}
else if (__way == ios_base::end)
- {
- __newoffi = __endi - __beg;
- __newoffo = __endo - __beg;
- }
+ __newoffo = __newoffi += this->egptr() - __beg;
if ((__testin || __testboth)
- && __newoffi + __off >= 0 && __endi - __beg >= __newoffi + __off)
+ && __newoffi >= 0
+ && this->egptr() - __beg >= __newoffi)
{
- this->_M_in_cur = __beg + __newoffi + __off;
+ this->gbump((__beg + __newoffi) - this->gptr());
__ret = pos_type(__newoffi);
}
if ((__testout || __testboth)
- && __newoffo + __off >= 0 && __endo - __beg >= __newoffo + __off)
+ && __newoffo >= 0
+ && this->egptr() - __beg >= __newoffo)
{
- _M_out_cur_move(__newoffo + __off - (this->_M_out_cur - __beg));
+ this->pbump((__beg + __newoffo) - this->pptr());
__ret = pos_type(__newoffo);
}
}
basic_stringbuf<_CharT, _Traits, _Alloc>::
seekpos(pos_type __sp, ios_base::openmode __mode)
{
- pos_type __ret = pos_type(off_type(-1));
-
- if (_M_string.capacity())
+ pos_type __ret = pos_type(off_type(-1));
+ 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))
{
- off_type __pos = __sp; // Use streamoff operator to do conversion.
- char_type* __beg = NULL;
- char_type* __end = NULL;
- bool __testin = (ios_base::in & this->_M_mode & __mode) != 0;
- bool __testout = (ios_base::out & this->_M_mode & __mode) != 0;
-
- // NB: Ordered.
- bool __testposi = false;
- bool __testposo = false;
- if (__testin)
- {
- __beg = this->eback();
- __end = this->egptr();
- if (0 <= __pos && __pos <= __end - __beg)
- __testposi = true;
- }
- if (__testout)
- {
- __beg = this->pbase();
- __end = this->epptr();
- if (0 <= __pos && __pos <= __end - __beg)
- __testposo = true;
- }
- if (__testposi || __testposo)
+ _M_update_egptr();
+
+ const off_type __pos(__sp);
+ const bool __testpos = (0 <= __pos
+ && __pos <= this->egptr() - __beg);
+ if (__testpos)
{
- if (__testposi)
- this->_M_in_cur = this->_M_in_beg + __pos;
- if (__testposo)
- _M_out_cur_move((__pos) - (this->_M_out_cur - __beg));
- __ret = pos_type(off_type(__pos));
+ if (__testin)
+ this->gbump((__beg + __pos) - this->gptr());
+ if (__testout)
+ this->pbump((__beg + __pos) - this->pptr());
+ __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.
+ // which are defined via explicit instantiations elsewhere.
// NB: This syntax is a GNU extension.
+#if _GLIBCXX_EXTERN_TEMPLATE
extern template class basic_stringbuf<char>;
extern template class basic_istringstream<char>;
extern template class basic_ostringstream<char>;
extern template class basic_stringstream<char>;
-#ifdef _GLIBCPP_USE_WCHAR_T
+#ifdef _GLIBCXX_USE_WCHAR_T
extern template class basic_stringbuf<wchar_t>;
extern template class basic_istringstream<wchar_t>;
extern template class basic_ostringstream<wchar_t>;
extern template class basic_stringstream<wchar_t>;
#endif
-} // namespace std
+#endif
+
+_GLIBCXX_END_NAMESPACE
#endif
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