+++ /dev/null
-// File based streams -*- C++ -*-
-
-// Copyright (C) 1997, 1998, 1999, 2000, 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: 27.8 File-based streams
-//
-
-#include <fstream>
-
-namespace std
-{
- template<>
- basic_filebuf<char>::int_type
- basic_filebuf<char>::_M_underflow_common(bool __bump)
- {
- int_type __ret = traits_type::eof();
- bool __testin = _M_mode & ios_base::in;
- bool __testout = _M_mode & ios_base::out;
-
- if (__testin)
- {
- // Check for pback madness, and if so swich back to the
- // normal buffers and jet outta here before expensive
- // fileops happen...
- if (_M_pback_init)
- {
- _M_pback_destroy();
- if (_M_in_cur < _M_in_end)
- return traits_type::to_int_type(*_M_in_cur);
- }
-
- // Sync internal and external buffers.
- // NB: __testget -> __testput as _M_buf_unified here.
- bool __testget = _M_in_cur && _M_in_beg < _M_in_cur;
- bool __testinit = _M_is_indeterminate();
- if (__testget)
- {
- if (__testout)
- _M_really_overflow();
- else if (_M_in_cur != _M_filepos)
- _M_file.seekoff(_M_in_cur - _M_filepos,
- ios_base::cur, ios_base::in);
- }
-
- if (__testinit || __testget)
- {
- streamsize __elen = 0;
- streamsize __ilen = 0;
- __elen = _M_file.xsgetn(reinterpret_cast<char*>(_M_in_beg),
- _M_buf_size);
- __ilen = __elen;
-
- if (0 < __ilen)
- {
- _M_set_determinate(__ilen);
- if (__testout)
- _M_out_cur = _M_in_cur;
- __ret = traits_type::to_int_type(*_M_in_cur);
- if (__bump)
- _M_in_cur_move(1);
- else if (_M_buf_size == 1)
- {
- // If we are synced with stdio, we have to unget the
- // character we just read so that the file pointer
- // doesn't move.
- _M_file.sys_ungetc(traits_type::to_int_type(*_M_in_cur));
- _M_set_indeterminate();
- }
- }
- }
- }
- _M_last_overflowed = false;
- return __ret;
- }
-
-#ifdef _GLIBCPP_USE_WCHAR_T
- template<>
- basic_filebuf<wchar_t>::int_type
- basic_filebuf<wchar_t>::_M_underflow_common(bool __bump)
- {
- int_type __ret = traits_type::eof();
- bool __testin = _M_mode & ios_base::in;
- bool __testout = _M_mode & ios_base::out;
-
- if (__testin)
- {
- // Check for pback madness, and if so swich back to the
- // normal buffers and jet outta here before expensive
- // fileops happen...
- if (_M_pback_init)
- {
- _M_pback_destroy();
- if (_M_in_cur < _M_in_end)
- return traits_type::to_int_type(*_M_in_cur);
- }
-
- // Sync internal and external buffers.
- // NB: __testget -> __testput as _M_buf_unified here.
- bool __testget = _M_in_cur && _M_in_beg < _M_in_cur;
- bool __testinit = _M_is_indeterminate();
- if (__testget)
- {
- if (__testout)
- _M_really_overflow();
- else if (_M_in_cur != _M_filepos)
- _M_file.seekoff(_M_in_cur - _M_filepos,
- ios_base::cur, ios_base::in);
- }
-
- if (__testinit || __testget)
- {
- const locale __loc = this->getloc();
- const __codecvt_type& __cvt = use_facet<__codecvt_type>(__loc);
-
- streamsize __elen = 0;
- streamsize __ilen = 0;
- if (__cvt.always_noconv())
- {
- __elen = _M_file.xsgetn(reinterpret_cast<char*>(_M_in_beg),
- _M_buf_size);
- __ilen = __elen;
- }
- else
- {
- char* __buf = static_cast<char*>(__builtin_alloca(_M_buf_size));
- __elen = _M_file.xsgetn(__buf, _M_buf_size);
-
- const char* __eend;
- char_type* __iend;
- __res_type __r = __cvt.in(_M_state_cur, __buf,
- __buf + __elen, __eend, _M_in_beg,
- _M_in_beg + _M_buf_size, __iend);
- if (__r == codecvt_base::ok)
- __ilen = __iend - _M_in_beg;
- else
- {
- // Unwind.
- __ilen = 0;
- _M_file.seekoff(-__elen, ios_base::cur, ios_base::in);
- }
- }
-
- if (0 < __ilen)
- {
- _M_set_determinate(__ilen);
- if (__testout)
- _M_out_cur = _M_in_cur;
- __ret = traits_type::to_int_type(*_M_in_cur);
- if (__bump)
- _M_in_cur_move(1);
- else if (_M_buf_size == 1)
- {
- // If we are synced with stdio, we have to unget the
- // character we just read so that the file pointer
- // doesn't move.
- _M_file.sys_ungetc(traits_type::to_int_type(*_M_in_cur));
- _M_set_indeterminate();
- }
- }
- }
- }
- _M_last_overflowed = false;
- return __ret;
- }
-#endif
-} // namespace std
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