1// -*- C++ -*- forwarding header.
2
3// Copyright (C) 1997-2022 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
52extern "C++"
53{
54#if __cplusplus >= 201103L
55namespace 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
63namespace std
64{
65_GLIBCXX_BEGIN_NAMESPACE_VERSION
66#define __cpp_lib_byte 201603L
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  template<> struct __byte_operand<wchar_t> { using __type = byte; };
77#ifdef _GLIBCXX_USE_CHAR8_T
78  template<> struct __byte_operand<char8_t> { using __type = byte; };
79#endif
80  template<> struct __byte_operand<char16_t> { using __type = byte; };
81  template<> struct __byte_operand<char32_t> { using __type = byte; };
82  template<> struct __byte_operand<short> { using __type = byte; };
83  template<> struct __byte_operand<unsigned short> { using __type = byte; };
84  template<> struct __byte_operand<int> { using __type = byte; };
85  template<> struct __byte_operand<unsigned int> { using __type = byte; };
86  template<> struct __byte_operand<long> { using __type = byte; };
87  template<> struct __byte_operand<unsigned long> { using __type = byte; };
88  template<> struct __byte_operand<long long> { using __type = byte; };
89  template<> struct __byte_operand<unsigned long long> { using __type = byte; };
90#if defined(__GLIBCXX_TYPE_INT_N_0)
91  template<> struct __byte_operand<__GLIBCXX_TYPE_INT_N_0>
92  { using __type = byte; };
93  template<> struct __byte_operand<unsigned __GLIBCXX_TYPE_INT_N_0>
94  { using __type = byte; };
95#endif
96#if defined(__GLIBCXX_TYPE_INT_N_1)
97  template<> struct __byte_operand<__GLIBCXX_TYPE_INT_N_1>
98  { using __type = byte; };
99  template<> struct __byte_operand<unsigned __GLIBCXX_TYPE_INT_N_1>
100  { using __type = byte; };
101#endif
102#if defined(__GLIBCXX_TYPE_INT_N_2)
103  template<> struct __byte_operand<__GLIBCXX_TYPE_INT_N_2>
104  { using __type = byte; };
105  template<> struct __byte_operand<unsigned __GLIBCXX_TYPE_INT_N_2>
106  { using __type = byte; };
107#endif
108  template<typename _IntegerType>
109    struct __byte_operand<const _IntegerType>
110    : __byte_operand<_IntegerType> { };
111  template<typename _IntegerType>
112    struct __byte_operand<volatile _IntegerType>
113    : __byte_operand<_IntegerType> { };
114  template<typename _IntegerType>
115    struct __byte_operand<const volatile _IntegerType>
116    : __byte_operand<_IntegerType> { };
117
118  template<typename _IntegerType>
119    using __byte_op_t = typename __byte_operand<_IntegerType>::__type;
120
121  template<typename _IntegerType>
122    [[__gnu__::__always_inline__]]
123    constexpr __byte_op_t<_IntegerType>
124    operator<<(byte __b, _IntegerType __shift) noexcept
125    { return (byte)(unsigned char)((unsigned)__b << __shift); }
126
127  template<typename _IntegerType>
128    [[__gnu__::__always_inline__]]
129    constexpr __byte_op_t<_IntegerType>
130    operator>>(byte __b, _IntegerType __shift) noexcept
131    { return (byte)(unsigned char)((unsigned)__b >> __shift); }
132
133  [[__gnu__::__always_inline__]]
134  constexpr byte
135  operator|(byte __l, byte __r) noexcept
136  { return (byte)(unsigned char)((unsigned)__l | (unsigned)__r); }
137
138  [[__gnu__::__always_inline__]]
139  constexpr byte
140  operator&(byte __l, byte __r) noexcept
141  { return (byte)(unsigned char)((unsigned)__l & (unsigned)__r); }
142
143  [[__gnu__::__always_inline__]]
144  constexpr byte
145  operator^(byte __l, byte __r) noexcept
146  { return (byte)(unsigned char)((unsigned)__l ^ (unsigned)__r); }
147
148  [[__gnu__::__always_inline__]]
149  constexpr byte
150  operator~(byte __b) noexcept
151  { return (byte)(unsigned char)~(unsigned)__b; }
152
153  template<typename _IntegerType>
154    [[__gnu__::__always_inline__]]
155    constexpr __byte_op_t<_IntegerType>&
156    operator<<=(byte& __b, _IntegerType __shift) noexcept
157    { return __b = __b << __shift; }
158
159  template<typename _IntegerType>
160    [[__gnu__::__always_inline__]]
161    constexpr __byte_op_t<_IntegerType>&
162    operator>>=(byte& __b, _IntegerType __shift) noexcept
163    { return __b = __b >> __shift; }
164
165  [[__gnu__::__always_inline__]]
166  constexpr byte&
167  operator|=(byte& __l, byte __r) noexcept
168  { return __l = __l | __r; }
169
170  [[__gnu__::__always_inline__]]
171  constexpr byte&
172  operator&=(byte& __l, byte __r) noexcept
173  { return __l = __l & __r; }
174
175  [[__gnu__::__always_inline__]]
176  constexpr byte&
177  operator^=(byte& __l, byte __r) noexcept
178  { return __l = __l ^ __r; }
179
180  template<typename _IntegerType>
181    [[nodiscard,__gnu__::__always_inline__]]
182    constexpr _IntegerType
183    to_integer(__byte_op_t<_IntegerType> __b) noexcept
184    { return _IntegerType(__b); }
185
186_GLIBCXX_END_NAMESPACE_VERSION
187} // namespace std
188#endif // C++17
189} // extern "C++"
190
191#endif // _GLIBCXX_CSTDDEF
192