# enc_filebuf.h

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    00001 // filebuf with encoding state type -*- C++ -*-
    00002
    00003 // Copyright (C) 2002, 2003, 2004, 2007, 2009 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 3, 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 // Under Section 7 of GPL version 3, you are granted additional
    00017 // permissions described in the GCC Runtime Library Exception, version
    00018 // 3.1, as published by the Free Software Foundation.
    00019
    00020 // You should have received a copy of the GNU General Public License and
    00021 // a copy of the GCC Runtime Library Exception along with this program;
    00022 // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
    00023 // <http://www.gnu.org/licenses/>.
    00024
    00025 /** @file ext/enc_filebuf.h
    00026  *  This file is a GNU extension to the Standard C++ Library.
    00027  */
    00028
    00029 #ifndef _EXT_ENC_FILEBUF_H
    00030 #define _EXT_ENC_FILEBUF_H 1
    00031
    00032 #include <fstream>
    00033 #include <locale>
    00034 #include <ext/codecvt_specializations.h>
    00035
    00036 _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
    00037
    00038   /// class enc_filebuf.
    00039   template<typename _CharT>
    00040     class enc_filebuf
    00041     : public std::basic_filebuf<_CharT, encoding_char_traits<_CharT> >
    00042     {
    00043     public:
    00044       typedef encoding_char_traits<_CharT>      traits_type;
    00045       typedef typename traits_type::state_type  state_type;
    00046       typedef typename traits_type::pos_type    pos_type;
    00047
    00048       enc_filebuf(state_type& __state)
    00049       : std::basic_filebuf<_CharT, encoding_char_traits<_CharT> >()
    00050       { this->_M_state_beg = __state; }
    00051
    00052     private:
    00053       // concept requirements:
    00054       // Set state type to something useful.
    00055       // Something more than copyconstructible is needed here, so
    00056       // require default and copy constructible + assignment operator.
    00057       __glibcxx_class_requires(state_type, _SGIAssignableConcept)
    00058     };
    00059
    00060 _GLIBCXX_END_NAMESPACE
    00061
    00062 #endif