1// <codecvt> -*- C++ -*- 
2 
3// Copyright (C) 2015-2019 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 
43namespace std _GLIBCXX_VISIBILITY(default) 
44{ 
45_GLIBCXX_BEGIN_NAMESPACE_VERSION 
46 
47 enum codecvt_mode 
48 { 
49 consume_header = 4, 
50 generate_header = 2, 
51 little_endian = 1 
52 }; 
53 
54 template<typename _Elem, unsigned long _Maxcode = 0x10ffff, 
55 codecvt_mode _Mode = (codecvt_mode)0> 
56 class codecvt_utf8 : public codecvt<_Elem, char, mbstate_t> 
57 { 
58 public: 
59 explicit 
60 codecvt_utf8(size_t __refs = 0); 
61 
62 ~codecvt_utf8(); 
63 }; 
64 
65 template<typename _Elem, unsigned long _Maxcode = 0x10ffff, 
66 codecvt_mode _Mode = (codecvt_mode)0> 
67 class codecvt_utf16 : public codecvt<_Elem, char, mbstate_t> 
68 { 
69 public: 
70 explicit 
71 codecvt_utf16(size_t __refs = 0); 
72 
73 ~codecvt_utf16(); 
74 }; 
75 
76 template<typename _Elem, unsigned long _Maxcode = 0x10ffff, 
77 codecvt_mode _Mode = (codecvt_mode)0> 
78 class codecvt_utf8_utf16 : public codecvt<_Elem, char, mbstate_t> 
79 { 
80 public: 
81 explicit 
82 codecvt_utf8_utf16(size_t __refs = 0); 
83 
84 ~codecvt_utf8_utf16(); 
85 }; 
86 
87#define _GLIBCXX_CODECVT_SPECIALIZATION2(_NAME, _ELEM) \ 
88 template<> \ 
89 class _NAME<_ELEM> \ 
90 : public codecvt<_ELEM, char, mbstate_t> \ 
91 { \ 
92 public: \ 
93 typedef _ELEM intern_type; \ 
94 typedef char extern_type; \ 
95 typedef mbstate_t state_type; \ 
96 \ 
97 protected: \ 
98 _NAME(unsigned long __maxcode, codecvt_mode __mode, size_t __refs) \ 
99 : codecvt(__refs), _M_maxcode(__maxcode), _M_mode(__mode) { } \ 
100 \ 
101 virtual \ 
102 ~_NAME(); \ 
103 \ 
104 virtual result \ 
105 do_out(state_type& __state, const intern_type* __from, \ 
106 const intern_type* __from_end, const intern_type*& __from_next, \ 
107 extern_type* __to, extern_type* __to_end, \ 
108 extern_type*& __to_next) const; \ 
109 \ 
110 virtual result \ 
111 do_unshift(state_type& __state, \ 
112 extern_type* __to, extern_type* __to_end, \ 
113 extern_type*& __to_next) const; \ 
114 \ 
115 virtual result \ 
116 do_in(state_type& __state, \ 
117 const extern_type* __from, const extern_type* __from_end, \ 
118 const extern_type*& __from_next, \ 
119 intern_type* __to, intern_type* __to_end, \ 
120 intern_type*& __to_next) const; \ 
121 \ 
122 virtual \ 
123 int do_encoding() const throw(); \ 
124 \ 
125 virtual \ 
126 bool do_always_noconv() const throw(); \ 
127 \ 
128 virtual \ 
129 int do_length(state_type&, const extern_type* __from, \ 
130 const extern_type* __end, size_t __max) const; \ 
131 \ 
132 virtual int \ 
133 do_max_length() const throw(); \ 
134 \ 
135 private: \ 
136 unsigned long _M_maxcode; \ 
137 codecvt_mode _M_mode; \ 
138 } 
139 
140#define _GLIBCXX_CODECVT_SPECIALIZATION(_NAME, _ELEM) \ 
141 _GLIBCXX_CODECVT_SPECIALIZATION2(__ ## _NAME ## _base, _ELEM); \ 
142 template<unsigned long _Maxcode, codecvt_mode _Mode> \ 
143 class _NAME<_ELEM, _Maxcode, _Mode> \ 
144 : public __ ## _NAME ## _base<_ELEM> \ 
145 { \ 
146 public: \ 
147 explicit \ 
148 _NAME(size_t __refs = 0) \ 
149 : __ ## _NAME ## _base<_ELEM>(std::min(_Maxcode, 0x10fffful), \ 
150 _Mode, __refs) \ 
151 { } \ 
152 } 
153 
154 template<typename _Elem> class __codecvt_utf8_base; 
155 template<typename _Elem> class __codecvt_utf16_base; 
156 template<typename _Elem> class __codecvt_utf8_utf16_base; 
157 
158 _GLIBCXX_CODECVT_SPECIALIZATION(codecvt_utf8, char16_t); 
159 _GLIBCXX_CODECVT_SPECIALIZATION(codecvt_utf16, char16_t); 
160 _GLIBCXX_CODECVT_SPECIALIZATION(codecvt_utf8_utf16, char16_t); 
161 
162 _GLIBCXX_CODECVT_SPECIALIZATION(codecvt_utf8, char32_t); 
163 _GLIBCXX_CODECVT_SPECIALIZATION(codecvt_utf16, char32_t); 
164 _GLIBCXX_CODECVT_SPECIALIZATION(codecvt_utf8_utf16, char32_t); 
165 
166#ifdef _GLIBCXX_USE_WCHAR_T 
167 _GLIBCXX_CODECVT_SPECIALIZATION(codecvt_utf8, wchar_t); 
168 _GLIBCXX_CODECVT_SPECIALIZATION(codecvt_utf16, wchar_t); 
169 _GLIBCXX_CODECVT_SPECIALIZATION(codecvt_utf8_utf16, wchar_t); 
170#endif 
171 
172_GLIBCXX_END_NAMESPACE_VERSION 
173} // namespace 
174 
175#endif // C++11 
176 
177#endif /* _GLIBCXX_CODECVT */ 
178