1// <codecvt> -*- C++ -*-
2
3// Copyright (C) 2015 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
45namespace 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 */
182