1 | // -*- C++ -*- forwarding header. |
2 | |
3 | // Copyright (C) 1997-2021 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 | /** @file cstddef |
26 | * This is a Standard C++ Library file. You should @c \#include this file |
27 | * in your programs, rather than any of the @a *.h implementation files. |
28 | * |
29 | * This is the C++ version of the Standard C Library header @c stddef.h, |
30 | * and its contents are (mostly) the same as that header, but are all |
31 | * contained in the namespace @c std (except for names which are defined |
32 | * as macros in C). |
33 | */ |
34 | |
35 | // |
36 | // ISO C++ 14882: 18.1 Types |
37 | // |
38 | |
39 | #ifndef _GLIBCXX_CSTDDEF |
40 | #define _GLIBCXX_CSTDDEF 1 |
41 | |
42 | #pragma GCC system_header |
43 | |
44 | #undef __need_wchar_t |
45 | #undef __need_ptrdiff_t |
46 | #undef __need_size_t |
47 | #undef __need_NULL |
48 | #undef __need_wint_t |
49 | #include <bits/c++config.h> |
50 | #include <stddef.h> |
51 | |
52 | extern "C++" |
53 | { |
54 | #if __cplusplus >= 201103L |
55 | namespace std |
56 | { |
57 | // We handle size_t, ptrdiff_t, and nullptr_t in c++config.h. |
58 | using ::max_align_t; |
59 | } |
60 | #endif // C++11 |
61 | |
62 | #if __cplusplus >= 201703L |
63 | namespace std |
64 | { |
65 | _GLIBCXX_BEGIN_NAMESPACE_VERSION |
66 | #define __cpp_lib_byte 201603 |
67 | |
68 | /// std::byte |
69 | enum class byte : unsigned char {}; |
70 | |
71 | template<typename _IntegerType> struct __byte_operand { }; |
72 | template<> struct __byte_operand<bool> { using __type = byte; }; |
73 | template<> struct __byte_operand<char> { using __type = byte; }; |
74 | template<> struct __byte_operand<signed char> { using __type = byte; }; |
75 | template<> struct __byte_operand<unsigned char> { using __type = byte; }; |
76 | #ifdef _GLIBCXX_USE_WCHAR_T |
77 | template<> struct __byte_operand<wchar_t> { using __type = byte; }; |
78 | #endif |
79 | #ifdef _GLIBCXX_USE_CHAR8_T |
80 | template<> struct __byte_operand<char8_t> { using __type = byte; }; |
81 | #endif |
82 | template<> struct __byte_operand<char16_t> { using __type = byte; }; |
83 | template<> struct __byte_operand<char32_t> { using __type = byte; }; |
84 | template<> struct __byte_operand<short> { using __type = byte; }; |
85 | template<> struct __byte_operand<unsigned short> { using __type = byte; }; |
86 | template<> struct __byte_operand<int> { using __type = byte; }; |
87 | template<> struct __byte_operand<unsigned int> { using __type = byte; }; |
88 | template<> struct __byte_operand<long> { using __type = byte; }; |
89 | template<> struct __byte_operand<unsigned long> { using __type = byte; }; |
90 | template<> struct __byte_operand<long long> { using __type = byte; }; |
91 | template<> struct __byte_operand<unsigned long long> { using __type = byte; }; |
92 | #if defined(__GLIBCXX_TYPE_INT_N_0) |
93 | template<> struct __byte_operand<__GLIBCXX_TYPE_INT_N_0> |
94 | { using __type = byte; }; |
95 | template<> struct __byte_operand<unsigned __GLIBCXX_TYPE_INT_N_0> |
96 | { using __type = byte; }; |
97 | #endif |
98 | #if defined(__GLIBCXX_TYPE_INT_N_1) |
99 | template<> struct __byte_operand<__GLIBCXX_TYPE_INT_N_1> |
100 | { using __type = byte; }; |
101 | template<> struct __byte_operand<unsigned __GLIBCXX_TYPE_INT_N_1> |
102 | { using __type = byte; }; |
103 | #endif |
104 | #if defined(__GLIBCXX_TYPE_INT_N_2) |
105 | template<> struct __byte_operand<__GLIBCXX_TYPE_INT_N_2> |
106 | { using __type = byte; }; |
107 | template<> struct __byte_operand<unsigned __GLIBCXX_TYPE_INT_N_2> |
108 | { using __type = byte; }; |
109 | #endif |
110 | template<typename _IntegerType> |
111 | struct __byte_operand<const _IntegerType> |
112 | : __byte_operand<_IntegerType> { }; |
113 | template<typename _IntegerType> |
114 | struct __byte_operand<volatile _IntegerType> |
115 | : __byte_operand<_IntegerType> { }; |
116 | template<typename _IntegerType> |
117 | struct __byte_operand<const volatile _IntegerType> |
118 | : __byte_operand<_IntegerType> { }; |
119 | |
120 | template<typename _IntegerType> |
121 | using __byte_op_t = typename __byte_operand<_IntegerType>::__type; |
122 | |
123 | template<typename _IntegerType> |
124 | [[__gnu__::__always_inline__]] |
125 | constexpr __byte_op_t<_IntegerType> |
126 | operator<<(byte __b, _IntegerType __shift) noexcept |
127 | { return (byte)(unsigned char)((unsigned)__b << __shift); } |
128 | |
129 | template<typename _IntegerType> |
130 | [[__gnu__::__always_inline__]] |
131 | constexpr __byte_op_t<_IntegerType> |
132 | (byte __b, _IntegerType __shift) noexcept |
133 | { return (byte)(unsigned char)((unsigned)__b >> __shift); } |
134 | |
135 | [[__gnu__::__always_inline__]] |
136 | constexpr byte |
137 | operator|(byte __l, byte __r) noexcept |
138 | { return (byte)(unsigned char)((unsigned)__l | (unsigned)__r); } |
139 | |
140 | [[__gnu__::__always_inline__]] |
141 | constexpr byte |
142 | operator&(byte __l, byte __r) noexcept |
143 | { return (byte)(unsigned char)((unsigned)__l & (unsigned)__r); } |
144 | |
145 | [[__gnu__::__always_inline__]] |
146 | constexpr byte |
147 | operator^(byte __l, byte __r) noexcept |
148 | { return (byte)(unsigned char)((unsigned)__l ^ (unsigned)__r); } |
149 | |
150 | [[__gnu__::__always_inline__]] |
151 | constexpr byte |
152 | operator~(byte __b) noexcept |
153 | { return (byte)(unsigned char)~(unsigned)__b; } |
154 | |
155 | template<typename _IntegerType> |
156 | [[__gnu__::__always_inline__]] |
157 | constexpr __byte_op_t<_IntegerType>& |
158 | operator<<=(byte& __b, _IntegerType __shift) noexcept |
159 | { return __b = __b << __shift; } |
160 | |
161 | template<typename _IntegerType> |
162 | [[__gnu__::__always_inline__]] |
163 | constexpr __byte_op_t<_IntegerType>& |
164 | operator>>=(byte& __b, _IntegerType __shift) noexcept |
165 | { return __b = __b >> __shift; } |
166 | |
167 | [[__gnu__::__always_inline__]] |
168 | constexpr byte& |
169 | operator|=(byte& __l, byte __r) noexcept |
170 | { return __l = __l | __r; } |
171 | |
172 | [[__gnu__::__always_inline__]] |
173 | constexpr byte& |
174 | operator&=(byte& __l, byte __r) noexcept |
175 | { return __l = __l & __r; } |
176 | |
177 | [[__gnu__::__always_inline__]] |
178 | constexpr byte& |
179 | operator^=(byte& __l, byte __r) noexcept |
180 | { return __l = __l ^ __r; } |
181 | |
182 | template<typename _IntegerType> |
183 | [[nodiscard,__gnu__::__always_inline__]] |
184 | constexpr _IntegerType |
185 | to_integer(__byte_op_t<_IntegerType> __b) noexcept |
186 | { return _IntegerType(__b); } |
187 | |
188 | _GLIBCXX_END_NAMESPACE_VERSION |
189 | } // namespace std |
190 | #endif // C++17 |
191 | } // extern "C++" |
192 | |
193 | #endif // _GLIBCXX_CSTDDEF |
194 | |