# enc_filebuf.h

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    00001 // filebuf with encoding state type -*- C++ -*-
    00002
    00003 // Copyright (C) 2002, 2003, 2004, 2007 Free Software Foundation, Inc.
    00004 //
    00005 // This file is part of the GNU ISO C++ Library.  This library is free
    00006 // software; you can redistribute it and/or modify it under the
    00007 // terms of the GNU General Public License as published by the
    00008 // Free Software Foundation; either version 2, or (at your option)
    00009 // any later version.
    00010
    00011 // This library is distributed in the hope that it will be useful,
    00012 // but WITHOUT ANY WARRANTY; without even the implied warranty of
    00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    00014 // GNU General Public License for more details.
    00015
    00016 // You should have received a copy of the GNU General Public License along
    00017 // with this library; see the file COPYING.  If not, write to the Free
    00018 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
    00019 // USA.
    00020
    00021 // As a special exception, you may use this file as part of a free software
    00022 // library without restriction.  Specifically, if other files instantiate
    00023 // templates or use macros or inline functions from this file, or you compile
    00024 // this file and link it with other files to produce an executable, this
    00025 // file does not by itself cause the resulting executable to be covered by
    00026 // the GNU General Public License.  This exception does not however
    00027 // invalidate any other reasons why the executable file might be covered by
    00028 // the GNU General Public License.
    00029
    00030 /** @file ext/enc_filebuf.h
    00031  *  This file is a GNU extension to the Standard C++ Library.
    00032  */
    00033
    00034 #ifndef _EXT_ENC_FILEBUF_H
    00035 #define _EXT_ENC_FILEBUF_H 1
    00036
    00037 #include <fstream>
    00038 #include <locale>
    00039 #include <ext/codecvt_specializations.h>
    00040
    00041 _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
    00042
    00043   /// class enc_filebuf.
    00044   template<typename _CharT>
    00045     class enc_filebuf
    00046     : public std::basic_filebuf<_CharT, encoding_char_traits<_CharT> >
    00047     {
    00048     public:
    00049       typedef encoding_char_traits<_CharT>      traits_type;
    00050       typedef typename traits_type::state_type  state_type;
    00051       typedef typename traits_type::pos_type    pos_type;
    00052
    00053       enc_filebuf(state_type& __state)
    00054       : std::basic_filebuf<_CharT, encoding_char_traits<_CharT> >()
    00055       { this->_M_state_beg = __state; }
    00056
    00057     private:
    00058       // concept requirements:
    00059       // Set state type to something useful.
    00060       // Something more than copyconstructible is needed here, so
    00061       // require default and copy constructible + assignment operator.
    00062       __glibcxx_class_requires(state_type, _SGIAssignableConcept)
    00063     };
    00064
    00065 _GLIBCXX_END_NAMESPACE
    00066
    00067 #endif