codecvt.cc revision 117397 
1// Copyright (C) 2000, 2002, 2003 Free Software Foundation, Inc.
2//
3// This file is part of the GNU ISO C++ Library.  This library is free
4// software; you can redistribute it and/or modify it under the
5// terms of the GNU General Public License as published by the
6// Free Software Foundation; either version 2, or (at your option)
7// any later version.
8
9// This library is distributed in the hope that it will be useful,
10// but WITHOUT ANY WARRANTY; without even the implied warranty of
11// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12// GNU General Public License for more details.
13
14// You should have received a copy of the GNU General Public License along
15// with this library; see the file COPYING.  If not, write to the Free
16// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
17// USA.
18
19// As a special exception, you may use this file as part of a free software
20// library without restriction.  Specifically, if other files instantiate
21// templates or use macros or inline functions from this file, or you compile
22// this file and link it with other files to produce an executable, this
23// file does not by itself cause the resulting executable to be covered by
24// the GNU General Public License.  This exception does not however
25// invalidate any other reasons why the executable file might be covered by
26// the GNU General Public License.
27
28// Written by Benjamin Kosnik <bkoz@cygnus.com>
29
30#include <locale>
31
32namespace std
33{
34  // Definitions for locale::id of standard facets that are specialized.
35 locale::id codecvt<char, char, mbstate_t>::id;
36
37#ifdef _GLIBCPP_USE_WCHAR_T
38  locale::id codecvt<wchar_t, char, mbstate_t>::id;
39#endif
40
41#ifdef _GLIBCPP_USE___ENC_TRAITS
42  // Definitions for static const data members of __enc_traits.
43  const int __enc_traits::_S_max_size;
44#endif
45
46  codecvt<char, char, mbstate_t>::
47  codecvt(size_t __refs)
48  : __codecvt_abstract_base<char, char, mbstate_t>(__refs)
49  { }
50
51  codecvt<char, char, mbstate_t>::
52  ~codecvt()
53  { }
54
55  codecvt_base::result
56  codecvt<char, char, mbstate_t>::
57  do_out(state_type&, const intern_type* __from,
58	 const intern_type*, const intern_type*& __from_next,
59	 extern_type* __to, extern_type*,
60	 extern_type*& __to_next) const
61  {
62    // _GLIBCPP_RESOLVE_LIB_DEFECTS
63    // According to the resolution of DR19, "If returns noconv [...]
64    // there are no changes to the values in [to, to_limit)."
65    __from_next = __from;
66    __to_next = __to;
67    return noconv;
68  }
69
70  codecvt_base::result
71  codecvt<char, char, mbstate_t>::
72  do_unshift(state_type&, extern_type* __to,
73             extern_type*, extern_type*& __to_next) const
74  {
75    __to_next = __to;
76    return noconv;
77  }
78
79  codecvt_base::result
80  codecvt<char, char, mbstate_t>::
81  do_in(state_type&, const extern_type* __from,
82	const extern_type*, const extern_type*& __from_next,
83	intern_type* __to, intern_type*,
84	intern_type*& __to_next) const
85  {
86    // _GLIBCPP_RESOLVE_LIB_DEFECTS
87    // According to the resolution of DR19, "If returns noconv [...]
88    // there are no changes to the values in [to, to_limit)."
89    __from_next = __from;
90    __to_next = __to;
91    return noconv;
92  }
93
94  int
95  codecvt<char, char, mbstate_t>::
96  do_encoding() const throw()
97  { return 1; }
98
99  bool
100  codecvt<char, char, mbstate_t>::
101  do_always_noconv() const throw()
102  { return true; }
103
104  int
105  codecvt<char, char, mbstate_t>::
106  do_length (const state_type&, const extern_type* __from,
107	     const extern_type* __end, size_t __max) const
108  { return min(__max, static_cast<size_t>(__end - __from)); }
109
110  int
111  codecvt<char, char, mbstate_t>::
112  do_max_length() const throw()
113  { return 1; }
114
115#ifdef _GLIBCPP_USE_WCHAR_T
116  // codecvt<wchar_t, char, mbstate_t> required specialization
117  codecvt<wchar_t, char, mbstate_t>::
118  codecvt(size_t __refs)
119  : __codecvt_abstract_base<wchar_t, char, mbstate_t>(__refs)
120  { }
121
122  codecvt<wchar_t, char, mbstate_t>::
123  ~codecvt()
124  { }
125
126  codecvt_base::result
127  codecvt<wchar_t, char, mbstate_t>::
128  do_unshift(state_type&, extern_type* __to,
129	     extern_type*, extern_type*& __to_next) const
130  {
131    __to_next = __to;
132    return noconv;
133  }
134
135  int
136  codecvt<wchar_t, char, mbstate_t>::
137  do_encoding() const throw()
138  { return sizeof(wchar_t); }
139
140  bool
141  codecvt<wchar_t, char, mbstate_t>::
142  do_always_noconv() const throw()
143  { return false; }
144
145  int
146  codecvt<wchar_t, char, mbstate_t>::
147  do_length(const state_type&, const extern_type* __from,
148	    const extern_type* __end, size_t __max) const
149  { return min(__max, static_cast<size_t>(__end - __from)); }
150
151  int
152  codecvt<wchar_t, char, mbstate_t>::
153  do_max_length() const throw()
154  { return 1; }
155#endif //  _GLIBCPP_USE_WCHAR_T
156} // namespace std
157