1// -*- C++ -*- forwarding header.
2
3// Copyright (C) 1997-2020 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 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    constexpr __byte_op_t<_IntegerType>
125    operator<<(byte __b, _IntegerType __shift) noexcept
126    { return (byte)(unsigned char)((unsigned)__b << __shift); }
127
128  template<typename _IntegerType>
129    constexpr __byte_op_t<_IntegerType>
130    operator>>(byte __b, _IntegerType __shift) noexcept
131    { return (byte)(unsigned char)((unsigned)__b >> __shift); }
132
133  constexpr byte
134  operator|(byte __l, byte __r) noexcept
135  { return (byte)(unsigned char)((unsigned)__l | (unsigned)__r); }
136
137  constexpr byte
138  operator&(byte __l, byte __r) noexcept
139  { return (byte)(unsigned char)((unsigned)__l & (unsigned)__r); }
140
141  constexpr byte
142  operator^(byte __l, byte __r) noexcept
143  { return (byte)(unsigned char)((unsigned)__l ^ (unsigned)__r); }
144
145  constexpr byte
146  operator~(byte __b) noexcept
147  { return (byte)(unsigned char)~(unsigned)__b; }
148
149  template<typename _IntegerType>
150    constexpr __byte_op_t<_IntegerType>&
151    operator<<=(byte& __b, _IntegerType __shift) noexcept
152    { return __b = __b << __shift; }
153
154  template<typename _IntegerType>
155    constexpr __byte_op_t<_IntegerType>&
156    operator>>=(byte& __b, _IntegerType __shift) noexcept
157    { return __b = __b >> __shift; }
158
159  constexpr byte&
160  operator|=(byte& __l, byte __r) noexcept
161  { return __l = __l | __r; }
162
163  constexpr byte&
164  operator&=(byte& __l, byte __r) noexcept
165  { return __l = __l & __r; }
166
167  constexpr byte&
168  operator^=(byte& __l, byte __r) noexcept
169  { return __l = __l ^ __r; }
170
171  template<typename _IntegerType>
172    constexpr _IntegerType
173    to_integer(__byte_op_t<_IntegerType> __b) noexcept
174    { return _IntegerType(__b); }
175
176_GLIBCXX_END_NAMESPACE_VERSION
177} // namespace std
178#endif // C++17
179} // extern "C++"
180
181#endif // _GLIBCXX_CSTDDEF
182