242 lines
7.4 KiB
C++
242 lines
7.4 KiB
C++
// String based streams -*- C++ -*-
|
|
|
|
// Copyright (C) 1997, 1998, 1999, 2001, 2002
|
|
// 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.
|
|
|
|
// 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.
|
|
|
|
//
|
|
// ISO C++ 14882: 27.7 String-based streams
|
|
//
|
|
|
|
#ifndef _CPP_BITS_SSTREAM_TCC
|
|
#define _CPP_BITS_SSTREAM_TCC 1
|
|
|
|
#pragma GCC system_header
|
|
|
|
#include <sstream>
|
|
|
|
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();
|
|
bool __testeof = traits_type::eq_int_type(__c, traits_type::eof());
|
|
bool __testpos = _M_in_cur && _M_in_beg < _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 (traits_type::eq(traits_type::to_char_type(__c), this->gptr()[-1])
|
|
&& !__testeof)
|
|
{
|
|
--_M_in_cur;
|
|
__ret = __c;
|
|
}
|
|
else if (!__testeof)
|
|
{
|
|
--_M_in_cur;
|
|
*_M_in_cur = traits_type::to_char_type(__c);
|
|
__ret = __c;
|
|
}
|
|
else if (__testeof)
|
|
{
|
|
--_M_in_cur;
|
|
__ret = traits_type::not_eof(__c);
|
|
}
|
|
}
|
|
return __ret;
|
|
}
|
|
|
|
template <class _CharT, class _Traits, class _Alloc>
|
|
typename basic_stringbuf<_CharT, _Traits, _Alloc>::int_type
|
|
basic_stringbuf<_CharT, _Traits, _Alloc>::
|
|
overflow(int_type __c)
|
|
{
|
|
int_type __ret = traits_type::eof();
|
|
bool __testeof = traits_type::eq_int_type(__c, __ret);
|
|
bool __testwrite = _M_out_cur < _M_buf + _M_buf_size;
|
|
bool __testout = _M_mode & ios_base::out;
|
|
|
|
// Try to append __c into output sequence in one of two ways.
|
|
// Order these tests done in is unspecified by the standard.
|
|
if (__testout)
|
|
{
|
|
if (!__testeof)
|
|
{
|
|
__size_type __len = std::max(_M_buf_size, _M_buf_size_opt);
|
|
__len *= 2;
|
|
|
|
if (__testwrite)
|
|
__ret = this->sputc(traits_type::to_char_type(__c));
|
|
else if (__len <= _M_string.max_size())
|
|
{
|
|
// Force-allocate, re-sync.
|
|
_M_string = this->str();
|
|
_M_string.reserve(__len);
|
|
_M_buf_size = __len;
|
|
_M_really_sync(_M_in_cur - _M_in_beg,
|
|
_M_out_cur - _M_out_beg);
|
|
*_M_out_cur = traits_type::to_char_type(__c);
|
|
_M_out_cur_move(1);
|
|
__ret = __c;
|
|
}
|
|
}
|
|
else
|
|
__ret = traits_type::not_eof(__c);
|
|
}
|
|
return __ret;
|
|
}
|
|
|
|
template <class _CharT, class _Traits, class _Alloc>
|
|
typename basic_stringbuf<_CharT, _Traits, _Alloc>::pos_type
|
|
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));
|
|
bool __testin = (ios_base::in & _M_mode & __mode) != 0;
|
|
bool __testout = (ios_base::out & _M_mode & __mode) != 0;
|
|
bool __testboth = __testin && __testout && __way != ios_base::cur;
|
|
__testin &= !(__mode & ios_base::out);
|
|
__testout &= !(__mode & ios_base::in);
|
|
|
|
if (_M_buf_size && (__testin || __testout || __testboth))
|
|
{
|
|
char_type* __beg = _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();
|
|
__endo = this->epptr();
|
|
}
|
|
|
|
off_type __newoffi = 0;
|
|
off_type __newoffo = 0;
|
|
if (__way == ios_base::cur)
|
|
{
|
|
__newoffi = __curi - __beg;
|
|
__newoffo = __curo - __beg;
|
|
}
|
|
else if (__way == ios_base::end)
|
|
{
|
|
__newoffi = __endi - __beg;
|
|
__newoffo = __endo - __beg;
|
|
}
|
|
|
|
if ((__testin || __testboth)
|
|
&& __newoffi + __off >= 0 && __endi - __beg >= __newoffi + __off)
|
|
{
|
|
_M_in_cur = __beg + __newoffi + __off;
|
|
__ret = pos_type(__newoffi);
|
|
}
|
|
if ((__testout || __testboth)
|
|
&& __newoffo + __off >= 0 && __endo - __beg >= __newoffo + __off)
|
|
{
|
|
_M_out_cur_move(__newoffo + __off - (_M_out_cur - __beg));
|
|
__ret = pos_type(__newoffo);
|
|
}
|
|
}
|
|
return __ret;
|
|
}
|
|
|
|
template <class _CharT, class _Traits, class _Alloc>
|
|
typename basic_stringbuf<_CharT, _Traits, _Alloc>::pos_type
|
|
basic_stringbuf<_CharT, _Traits, _Alloc>::
|
|
seekpos(pos_type __sp, ios_base::openmode __mode)
|
|
{
|
|
pos_type __ret = pos_type(off_type(-1));
|
|
|
|
if (_M_buf_size)
|
|
{
|
|
off_type __pos = __sp; // Use streamoff operator to do conversion.
|
|
char_type* __beg = NULL;
|
|
char_type* __end = NULL;
|
|
bool __testin = (ios_base::in & _M_mode & __mode) != 0;
|
|
bool __testout = (ios_base::out & _M_mode & __mode) != 0;
|
|
bool __testboth = __testin && __testout;
|
|
__testin &= !(__mode & ios_base::out);
|
|
__testout &= !(__mode & ios_base::in);
|
|
|
|
// NB: Ordered.
|
|
bool __testposi = false;
|
|
bool __testposo = false;
|
|
if (__testin || __testboth)
|
|
{
|
|
__beg = this->eback();
|
|
__end = this->egptr();
|
|
if (0 <= __pos && __pos <= __end - __beg)
|
|
__testposi = true;
|
|
}
|
|
if (__testout || __testboth)
|
|
{
|
|
__beg = this->pbase();
|
|
__end = _M_buf + _M_buf_size;
|
|
if (0 <= __pos && __pos <= __end - __beg)
|
|
__testposo = true;
|
|
}
|
|
if (__testposi || __testposo)
|
|
{
|
|
if (__testposi)
|
|
_M_in_cur = _M_in_beg + __pos;
|
|
if (__testposo)
|
|
_M_out_cur_move((__pos) - (_M_out_cur - __beg));
|
|
__ret = pos_type(off_type(__pos));
|
|
}
|
|
}
|
|
return __ret;
|
|
}
|
|
|
|
// Inhibit implicit instantiations for required instantiations,
|
|
// which are defined via explicit instantiations elsewhere.
|
|
// NB: This syntax is a GNU extension.
|
|
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
|
|
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
|