62 lines
2.3 KiB
C++
62 lines
2.3 KiB
C++
// __enc_traits layer for filebuf -*- C++ -*-
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// Copyright (C) 2002 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 2, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING. If not, write to the Free
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// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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// USA.
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// As a special exception, you may use this file as part of a free software
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// library without restriction. Specifically, if other files instantiate
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// templates or use macros or inline functions from this file, or you compile
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// this file and link it with other files to produce an executable, this
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// file does not by itself cause the resulting executable to be covered by
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// the GNU General Public License. This exception does not however
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// invalidate any other reasons why the executable file might be covered by
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// the GNU General Public License.
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#include <fstream>
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#include <locale>
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namespace __gnu_cxx
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{
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// Custom traits type with __enc_traits for state type, all other bits
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// equivalent to the required char_traits instantiations.
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template<typename _CharT>
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struct enc_char_traits: public std::char_traits<_CharT>
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{
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typedef std::__enc_traits state_type;
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};
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template<typename _CharT>
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class enc_filebuf
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: public std::basic_filebuf<_CharT, enc_char_traits<_CharT> >
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{
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public:
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typedef typename enc_char_traits<_CharT>::state_type state_type;
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enc_filebuf(state_type& __state)
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: std::basic_filebuf<_CharT, enc_char_traits<_CharT> >()
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{
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// Set state type to something useful.
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// Something more than copyconstructible is needed here, so
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// require copyconstructible + assignment operator.
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__glibcpp_class_requires(state_type, _SGIAssignableConcept);
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_M_state_cur = __state;
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_M_state_cur._M_init();
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};
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};
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} // namespace __gnu_cxx
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