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- // filebuf with __enc_traits state type -*- C++ -*-
-
- // Copyright (C) 2002, 2003 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.
-
- #include <fstream>
- #include <locale>
-
- namespace __gnu_cxx
- {
- // Custom traits type with __enc_traits for the state type, and the
- // associated fpos<__enc_traits> for the position type, all other
- // bits equivalent to the required char_traits instantiations.
- template<typename _CharT>
- struct enc_char_traits: public std::char_traits<_CharT>
- {
- typedef std::__enc_traits state_type;
- typedef typename std::fpos<state_type> pos_type;
- };
-
- template<typename _CharT>
- class enc_filebuf
- : public std::basic_filebuf<_CharT, enc_char_traits<_CharT> >
- {
- public:
- typedef enc_char_traits<_CharT> traits_type;
- typedef typename traits_type::state_type state_type;
- typedef typename traits_type::pos_type pos_type;
-
- enc_filebuf(state_type& __state)
- : std::basic_filebuf<_CharT, enc_char_traits<_CharT> >()
- {
- this->_M_state_beg = __state;
- this->_M_state_beg._M_init();
- }
-
- private:
- // concept requirements:
- // Set state type to something useful.
- // Something more than copyconstructible is needed here, so
- // require default and copy constructible + assignment operator.
- __glibcxx_class_requires(state_type, _SGIAssignableConcept)
- };
- } // namespace __gnu_cxx
-