1/*===---- stddef.h - Basic type definitions --------------------------------===
2 *
3 * Copyright (c) 2008 Eli Friedman
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a copy
6 * of this software and associated documentation files (the "Software"), to deal
7 * in the Software without restriction, including without limitation the rights
8 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
9 * copies of the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
21 * THE SOFTWARE.
22 *
23 *===-----------------------------------------------------------------------===
24 */
25
26#if !defined(__STDDEF_H) || defined(__need_ptrdiff_t) ||                       \
27    defined(__need_size_t) || defined(__need_wchar_t) ||                       \
28    defined(__need_NULL) || defined(__need_wint_t)
29
30#if !defined(__need_ptrdiff_t) && !defined(__need_size_t) &&                   \
31    !defined(__need_wchar_t) && !defined(__need_NULL) &&                       \
32    !defined(__need_wint_t)
33/* Always define miscellaneous pieces when modules are available. */
34#if !__has_feature(modules)
35#define __STDDEF_H
36#endif
37#define __need_ptrdiff_t
38#define __need_size_t
39#define __need_wchar_t
40#define __need_NULL
41#define __need_STDDEF_H_misc
42/* __need_wint_t is intentionally not defined here. */
43#endif
44
45#if defined(__need_ptrdiff_t)
46#if !defined(_PTRDIFF_T) || __has_feature(modules)
47/* Always define ptrdiff_t when modules are available. */
48#if !__has_feature(modules)
49#define _PTRDIFF_T
50#endif
51typedef __PTRDIFF_TYPE__ ptrdiff_t;
52#endif
53#undef __need_ptrdiff_t
54#endif /* defined(__need_ptrdiff_t) */
55
56#if defined(__need_size_t)
57#if !defined(_SIZE_T) || __has_feature(modules)
58/* Always define size_t when modules are available. */
59#if !__has_feature(modules)
60#define _SIZE_T
61#endif
62typedef __SIZE_TYPE__ size_t;
63#endif
64#undef __need_size_t
65#endif /*defined(__need_size_t) */
66
67#if defined(__need_STDDEF_H_misc)
68/* ISO9899:2011 7.20 (C11 Annex K): Define rsize_t if __STDC_WANT_LIB_EXT1__ is
69 * enabled. */
70#if (defined(__STDC_WANT_LIB_EXT1__) && __STDC_WANT_LIB_EXT1__ >= 1 && \
71     !defined(_RSIZE_T)) || __has_feature(modules)
72/* Always define rsize_t when modules are available. */
73#if !__has_feature(modules)
74#define _RSIZE_T
75#endif
76typedef __SIZE_TYPE__ rsize_t;
77#endif
78#endif /* defined(__need_STDDEF_H_misc) */
79
80#if defined(__need_wchar_t)
81#ifndef __cplusplus
82/* Always define wchar_t when modules are available. */
83#if !defined(_WCHAR_T) || __has_feature(modules)
84#if !__has_feature(modules)
85#define _WCHAR_T
86#if defined(_MSC_EXTENSIONS)
87#define _WCHAR_T_DEFINED
88#endif
89#endif
90typedef __WCHAR_TYPE__ wchar_t;
91#endif
92#endif
93#undef __need_wchar_t
94#endif /* defined(__need_wchar_t) */
95
96#if defined(__need_NULL)
97#undef NULL
98#ifdef __cplusplus
99#  if !defined(__MINGW32__) && !defined(_MSC_VER)
100#    define NULL __null
101#  else
102#    define NULL 0
103#  endif
104#else
105#  define NULL ((void*)0)
106#endif
107#ifdef __cplusplus
108#if defined(_MSC_EXTENSIONS) && defined(_NATIVE_NULLPTR_SUPPORTED)
109namespace std { typedef decltype(nullptr) nullptr_t; }
110using ::std::nullptr_t;
111#endif
112#endif
113#undef __need_NULL
114#endif /* defined(__need_NULL) */
115
116#if defined(__need_STDDEF_H_misc)
117#if __STDC_VERSION__ >= 201112L || __cplusplus >= 201103L
118#include "__stddef_max_align_t.h"
119#endif
120#define offsetof(t, d) __builtin_offsetof(t, d)
121#undef __need_STDDEF_H_misc
122#endif  /* defined(__need_STDDEF_H_misc) */
123
124/* Some C libraries expect to see a wint_t here. Others (notably MinGW) will use
125__WINT_TYPE__ directly; accommodate both by requiring __need_wint_t */
126#if defined(__need_wint_t)
127/* Always define wint_t when modules are available. */
128#if !defined(_WINT_T) || __has_feature(modules)
129#if !__has_feature(modules)
130#define _WINT_T
131#endif
132typedef __WINT_TYPE__ wint_t;
133#endif
134#undef __need_wint_t
135#endif /* __need_wint_t */
136
137#endif
138