libstdc++
codecvt
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1 // <codecvt> -*- C++ -*-
2 
3 // Copyright (C) 2015-2017 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 // ISO C++ 14882: 22.5 Standard code conversion facets
26 
27 /** @file include/codecvt
28  * This is a Standard C++ Library header.
29  */
30 
31 #ifndef _GLIBCXX_CODECVT
32 #define _GLIBCXX_CODECVT 1
33 
34 #pragma GCC system_header
35 
36 #if __cplusplus < 201103L
37 # include <bits/c++0x_warning.h>
38 #else
39 
40 #include <bits/locale_classes.h>
41 #include <bits/codecvt.h>
42 
43 #ifdef _GLIBCXX_USE_C99_STDINT_TR1
44 
45 namespace std _GLIBCXX_VISIBILITY(default)
46 {
47 _GLIBCXX_BEGIN_NAMESPACE_VERSION
48 
49  enum codecvt_mode
50  {
51  consume_header = 4,
52  generate_header = 2,
53  little_endian = 1
54  };
55 
56  template<typename _Elem, unsigned long _Maxcode = 0x10ffff,
57  codecvt_mode _Mode = (codecvt_mode)0>
58  class codecvt_utf8 : public codecvt<_Elem, char, mbstate_t>
59  {
60  public:
61  explicit
62  codecvt_utf8(size_t __refs = 0);
63 
64  ~codecvt_utf8();
65  };
66 
67  template<typename _Elem, unsigned long _Maxcode = 0x10ffff,
68  codecvt_mode _Mode = (codecvt_mode)0>
69  class codecvt_utf16 : public codecvt<_Elem, char, mbstate_t>
70  {
71  public:
72  explicit
73  codecvt_utf16(size_t __refs = 0);
74 
75  ~codecvt_utf16();
76  };
77 
78  template<typename _Elem, unsigned long _Maxcode = 0x10ffff,
79  codecvt_mode _Mode = (codecvt_mode)0>
80  class codecvt_utf8_utf16 : public codecvt<_Elem, char, mbstate_t>
81  {
82  public:
83  explicit
84  codecvt_utf8_utf16(size_t __refs = 0);
85 
86  ~codecvt_utf8_utf16();
87  };
88 
89 #define _GLIBCXX_CODECVT_SPECIALIZATION2(_NAME, _ELEM) \
90  template<> \
91  class _NAME<_ELEM> \
92  : public codecvt<_ELEM, char, mbstate_t> \
93  { \
94  public: \
95  typedef _ELEM intern_type; \
96  typedef char extern_type; \
97  typedef mbstate_t state_type; \
98  \
99  protected: \
100  _NAME(unsigned long __maxcode, codecvt_mode __mode, size_t __refs) \
101  : codecvt(__refs), _M_maxcode(__maxcode), _M_mode(__mode) { } \
102  \
103  virtual \
104  ~_NAME(); \
105  \
106  virtual result \
107  do_out(state_type& __state, const intern_type* __from, \
108  const intern_type* __from_end, const intern_type*& __from_next, \
109  extern_type* __to, extern_type* __to_end, \
110  extern_type*& __to_next) const; \
111  \
112  virtual result \
113  do_unshift(state_type& __state, \
114  extern_type* __to, extern_type* __to_end, \
115  extern_type*& __to_next) const; \
116  \
117  virtual result \
118  do_in(state_type& __state, \
119  const extern_type* __from, const extern_type* __from_end, \
120  const extern_type*& __from_next, \
121  intern_type* __to, intern_type* __to_end, \
122  intern_type*& __to_next) const; \
123  \
124  virtual \
125  int do_encoding() const throw(); \
126  \
127  virtual \
128  bool do_always_noconv() const throw(); \
129  \
130  virtual \
131  int do_length(state_type&, const extern_type* __from, \
132  const extern_type* __end, size_t __max) const; \
133  \
134  virtual int \
135  do_max_length() const throw(); \
136  \
137  private: \
138  unsigned long _M_maxcode; \
139  codecvt_mode _M_mode; \
140  }
141 
142 #define _GLIBCXX_CODECVT_SPECIALIZATION(_NAME, _ELEM) \
143  _GLIBCXX_CODECVT_SPECIALIZATION2(__ ## _NAME ## _base, _ELEM); \
144  template<unsigned long _Maxcode, codecvt_mode _Mode> \
145  class _NAME<_ELEM, _Maxcode, _Mode> \
146  : public __ ## _NAME ## _base<_ELEM> \
147  { \
148  public: \
149  explicit \
150  _NAME(size_t __refs = 0) \
151  : __ ## _NAME ## _base<_ELEM>(std::min(_Maxcode, 0x10fffful), \
152  _Mode, __refs) \
153  { } \
154  }
155 
156  template<typename _Elem> class __codecvt_utf8_base;
157  template<typename _Elem> class __codecvt_utf16_base;
158  template<typename _Elem> class __codecvt_utf8_utf16_base;
159 
160  _GLIBCXX_CODECVT_SPECIALIZATION(codecvt_utf8, char16_t);
161  _GLIBCXX_CODECVT_SPECIALIZATION(codecvt_utf16, char16_t);
162  _GLIBCXX_CODECVT_SPECIALIZATION(codecvt_utf8_utf16, char16_t);
163 
164  _GLIBCXX_CODECVT_SPECIALIZATION(codecvt_utf8, char32_t);
165  _GLIBCXX_CODECVT_SPECIALIZATION(codecvt_utf16, char32_t);
166  _GLIBCXX_CODECVT_SPECIALIZATION(codecvt_utf8_utf16, char32_t);
167 
168 #ifdef _GLIBCXX_USE_WCHAR_T
169  _GLIBCXX_CODECVT_SPECIALIZATION(codecvt_utf8, wchar_t);
170  _GLIBCXX_CODECVT_SPECIALIZATION(codecvt_utf16, wchar_t);
171  _GLIBCXX_CODECVT_SPECIALIZATION(codecvt_utf8_utf16, wchar_t);
172 #endif
173 
174 _GLIBCXX_END_NAMESPACE_VERSION
175 } // namespace
176 
177 #endif // _GLIBCXX_USE_C99_STDINT_TR1
178 
179 #endif
180 
181 #endif /* _GLIBCXX_CODECVT */
ISO C++ entities toplevel namespace is std.