charmapcodec.h
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1 /*
2  * Copyright (C) 2015 by Tommi Maekitalo
3  *
4  * This library is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * As a special exception, you may use this file as part of a free
10  * software library without restriction. Specifically, if other files
11  * instantiate templates or use macros or inline functions from this
12  * file, or you compile this file and link it with other files to
13  * produce an executable, this file does not by itself cause the
14  * resulting executable to be covered by the GNU General Public
15  * License. This exception does not however invalidate any other
16  * reasons why the executable file might be covered by the GNU Library
17  * General Public License.
18  *
19  * This library is distributed in the hope that it will be useful,
20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
22  * Lesser General Public License for more details.
23  *
24  * You should have received a copy of the GNU Lesser General Public
25  * License along with this library; if not, write to the Free Software
26  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
27  */
28 #ifndef CXXTOOLS_CHARMAPCODEC_H
29 #define CXXTOOLS_CHARMAPCODEC_H
30 
31 #include <cxxtools/char.h>
32 #include <cxxtools/textcodec.h>
33 #include <cxxtools/string.h>
34 
35 namespace cxxtools
36 {
37 
42 class CharMapCodec : public TextCodec<Char, char>
43 {
44  typedef Char::value_type CharMap[256];
45  const CharMap& _charMap;
46 
47  public:
48  explicit CharMapCodec(const CharMap& charMap, size_t ref = 0)
49  : TextCodec<Char, char>(ref),
50  _charMap(charMap)
51  {}
52 
53  virtual ~CharMapCodec()
54  {}
55 
56  protected:
57  virtual result do_in(MBState& s, const char* fromBegin,
58  const char* fromEnd, const char*& fromNext,
59  Char* toBegin, Char* toEnd, Char*& toNext) const;
60  virtual result do_out(MBState& s, const Char* fromBegin,
61  const Char* fromEnd, const Char*& fromNext,
62  char* toBegin, char* toEnd, char*& toNext) const;
63 
64  std::codecvt_base::result do_unshift(cxxtools::MBState&, char*, char*, char*&) const
65  { return std::codecvt_base::noconv; }
66 
67  bool do_always_noconv() const throw();
68 
69  int do_length(MBState& s, const char* fromBegin,
70  const char* fromEnd, size_t max) const;
71 
72  int do_encoding() const throw()
73  { return 0; }
74 
75  int do_max_length() const throw();
76 };
77 
78 
79 }
80 
81 #endif