1// filebuf with encoding state type -*- C++ -*-
2
3// Copyright (C) 2002, 2003, 2004, 2007, 2009 Free Software Foundation, Inc.
4//
5// This file is part of the GNU ISO C++ Library.  This library is free
6// software; you can redistribute it and/or modify it under the
7// terms of the GNU General Public License as published by the
8// Free Software Foundation; either version 3, or (at your option)
9// any later version.
10
11// This library is distributed in the hope that it will be useful,
12// but WITHOUT ANY WARRANTY; without even the implied warranty of
13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14// GNU General Public License for more details.
15
16// Under Section 7 of GPL version 3, you are granted additional
17// permissions described in the GCC Runtime Library Exception, version
18// 3.1, as published by the Free Software Foundation.
19
20// You should have received a copy of the GNU General Public License and
21// a copy of the GCC Runtime Library Exception along with this program;
22// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
23// <http://www.gnu.org/licenses/>.
24
25/** @file ext/enc_filebuf.h
26 *  This file is a GNU extension to the Standard C++ Library.
27 */
28
29#ifndef _EXT_ENC_FILEBUF_H
30#define _EXT_ENC_FILEBUF_H 1
31
32#include <fstream>
33#include <locale>
34#include <ext/codecvt_specializations.h>
35
36namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
37{
38_GLIBCXX_BEGIN_NAMESPACE_VERSION
39
40  /// class enc_filebuf.
41  template<typename _CharT>
42    class enc_filebuf
43    : public std::basic_filebuf<_CharT, encoding_char_traits<_CharT> >
44    {
45    public:
46      typedef encoding_char_traits<_CharT>     	traits_type;
47      typedef typename traits_type::state_type	state_type;
48      typedef typename traits_type::pos_type	pos_type;
49
50      enc_filebuf(state_type& __state)
51      : std::basic_filebuf<_CharT, encoding_char_traits<_CharT> >()
52      { this->_M_state_beg = __state; }
53
54    private:
55      // concept requirements:
56      // Set state type to something useful.
57      // Something more than copyconstructible is needed here, so
58      // require default and copy constructible + assignment operator.
59      __glibcxx_class_requires(state_type, _SGIAssignableConcept)
60    };
61
62_GLIBCXX_END_NAMESPACE_VERSION
63} // namespace
64
65#endif
66