libstdc++
enc_filebuf.h
Go to the documentation of this file.
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>
35 
36 namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
37 {
38 _GLIBCXX_BEGIN_NAMESPACE_VERSION
39 
40  /// class enc_filebuf.
41  template<typename _CharT>
43  : public std::basic_filebuf<_CharT, encoding_char_traits<_CharT> >
44  {
45  public:
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