1// <codecvt> -*- C++ -*-
2
3// Copyright (C) 2015-2021 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