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// filebuf with encoding state type -*- C++ -*-

// Copyright (C) 2002, 2003, 2004, 2007, 2009 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 3, 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.

// Under Section 7 of GPL version 3, you are granted additional

// permissions described in the GCC Runtime Library Exception, version

// 3.1, as published by the Free Software Foundation.

// You should have received a copy of the GNU General Public License and

// a copy of the GCC Runtime Library Exception along with this program;

// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see

// <http://www.gnu.org/licenses/>.

/** @file ext/enc_filebuf.h

 *  This file is a GNU extension to the Standard C++ Library.

 */

#ifndef _EXT_ENC_FILEBUF_H

#define _EXT_ENC_FILEBUF_H 1

#include <fstream>

#include <locale>

#include <ext/codecvt_specializations.h>

_GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)

  /// class enc_filebuf.

  template<typename _CharT>

    class enc_filebuf

    : public std::basic_filebuf<_CharT, encoding_char_traits<_CharT> >

    {

    public:

      typedef encoding_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, encoding_char_traits<_CharT> >()

      { this->_M_state_beg = __state; }

    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)

    };

_GLIBCXX_END_NAMESPACE

#endif