1// Copyright (C) 2000, 2002, 2004, 2005 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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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@redhat.com>
29
30#include <locale>
31
32_GLIBCXX_BEGIN_NAMESPACE(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 _GLIBCXX_USE_WCHAR_T
38  locale::id codecvt<wchar_t, char, mbstate_t>::id;
39#endif
40
41  codecvt<char, char, mbstate_t>::
42  codecvt(size_t __refs)
43  : __codecvt_abstract_base<char, char, mbstate_t>(__refs),
44  _M_c_locale_codecvt(_S_get_c_locale())
45  { }
46
47  codecvt<char, char, mbstate_t>::
48  codecvt(__c_locale __cloc, size_t __refs)
49  : __codecvt_abstract_base<char, char, mbstate_t>(__refs),
50  _M_c_locale_codecvt(_S_clone_c_locale(__cloc))
51  { }
52
53  codecvt<char, char, mbstate_t>::
54  ~codecvt()
55  { _S_destroy_c_locale(_M_c_locale_codecvt); }
56
57  codecvt_base::result
58  codecvt<char, char, mbstate_t>::
59  do_out(state_type&, const intern_type* __from,
60	 const intern_type*, const intern_type*& __from_next,
61	 extern_type* __to, extern_type*,
62	 extern_type*& __to_next) const
63  {
64    // _GLIBCXX_RESOLVE_LIB_DEFECTS
65    // According to the resolution of DR19, "If returns noconv [...]
66    // there are no changes to the values in [to, to_limit)."
67    __from_next = __from;
68    __to_next = __to;
69    return noconv;
70  }
71
72  codecvt_base::result
73  codecvt<char, char, mbstate_t>::
74  do_unshift(state_type&, extern_type* __to,
75             extern_type*, extern_type*& __to_next) const
76  {
77    __to_next = __to;
78    return noconv;
79  }
80
81  codecvt_base::result
82  codecvt<char, char, mbstate_t>::
83  do_in(state_type&, const extern_type* __from,
84	const extern_type*, const extern_type*& __from_next,
85	intern_type* __to, intern_type*, intern_type*& __to_next) const
86  {
87    // _GLIBCXX_RESOLVE_LIB_DEFECTS
88    // According to the resolution of DR19, "If returns noconv [...]
89    // there are no changes to the values in [to, to_limit)."
90    __from_next = __from;
91    __to_next = __to;
92    return noconv;
93  }
94
95  int
96  codecvt<char, char, mbstate_t>::
97  do_encoding() const throw()
98  { return 1; }
99
100  bool
101  codecvt<char, char, mbstate_t>::
102  do_always_noconv() const throw()
103  { return true; }
104
105  int
106  codecvt<char, char, mbstate_t>::
107  do_length (state_type&, const extern_type* __from,
108	     const extern_type* __end, size_t __max) const
109  {
110    size_t __d = static_cast<size_t>(__end - __from);
111    return std::min(__max, __d);
112  }
113
114  int
115  codecvt<char, char, mbstate_t>::
116  do_max_length() const throw()
117  { return 1; }
118
119#ifdef _GLIBCXX_USE_WCHAR_T
120  // codecvt<wchar_t, char, mbstate_t> required specialization
121  codecvt<wchar_t, char, mbstate_t>::
122  codecvt(size_t __refs)
123  : __codecvt_abstract_base<wchar_t, char, mbstate_t>(__refs),
124  _M_c_locale_codecvt(_S_get_c_locale())
125  { }
126
127  codecvt<wchar_t, char, mbstate_t>::
128  codecvt(__c_locale __cloc, size_t __refs)
129  : __codecvt_abstract_base<wchar_t, char, mbstate_t>(__refs),
130  _M_c_locale_codecvt(_S_clone_c_locale(__cloc))
131  { }
132
133  codecvt<wchar_t, char, mbstate_t>::
134  ~codecvt()
135  { _S_destroy_c_locale(_M_c_locale_codecvt); }
136
137  codecvt_base::result
138  codecvt<wchar_t, char, mbstate_t>::
139  do_unshift(state_type&, extern_type* __to,
140	     extern_type*, extern_type*& __to_next) const
141  {
142    // XXX Probably wrong for stateful encodings
143    __to_next = __to;
144    return noconv;
145  }
146
147  bool
148  codecvt<wchar_t, char, mbstate_t>::
149  do_always_noconv() const throw()
150  { return false; }
151#endif //  _GLIBCXX_USE_WCHAR_T
152
153_GLIBCXX_END_NAMESPACE
154