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#define __STDDEF_H
34#define __need_ptrdiff_t
35#define __need_size_t
36#define __need_wchar_t
37#define __need_NULL
38/* __need_wint_t is intentionally not defined here. */
39#endif
40
41#if defined(__need_ptrdiff_t)
42#if !defined(_PTRDIFF_T) || __has_feature(modules)
43/* Always define ptrdiff_t when modules are available. */
44#if !__has_feature(modules)
45#define _PTRDIFF_T
46#endif
47typedef __PTRDIFF_TYPE__ ptrdiff_t;
48#endif
49#undef __need_ptrdiff_t
50#endif /* defined(__need_ptrdiff_t) */
51
52#if defined(__need_size_t)
53#if !defined(_SIZE_T) || __has_feature(modules)
54/* Always define size_t when modules are available. */
55#if !__has_feature(modules)
56#define _SIZE_T
57#endif
58typedef __SIZE_TYPE__ size_t;
59#endif
60#undef __need_size_t
61#endif /*defined(__need_size_t) */
62
63#if defined(__STDDEF_H)
64/* ISO9899:2011 7.20 (C11 Annex K): Define rsize_t if __STDC_WANT_LIB_EXT1__ is
65 * enabled. */
66#if (defined(__STDC_WANT_LIB_EXT1__) && __STDC_WANT_LIB_EXT1__ >= 1 && \
67     !defined(_RSIZE_T)) || __has_feature(modules)
68/* Always define rsize_t when modules are available. */
69#if !__has_feature(modules)
70#define _RSIZE_T
71#endif
72typedef __SIZE_TYPE__ rsize_t;
73#endif
74#endif /* defined(__STDDEF_H) */
75
76#if defined(__need_wchar_t)
77#ifndef __cplusplus
78/* Always define wchar_t when modules are available. */
79#if !defined(_WCHAR_T) || __has_feature(modules)
80#if !__has_feature(modules)
81#define _WCHAR_T
82#if defined(_MSC_EXTENSIONS)
83#define _WCHAR_T_DEFINED
84#endif
85#endif
86typedef __WCHAR_TYPE__ wchar_t;
87#endif
88#endif
89#undef __need_wchar_t
90#endif /* defined(__need_wchar_t) */
91
92#if defined(__need_NULL)
93#undef NULL
94#ifdef __cplusplus
95#  if !defined(__MINGW32__) && !defined(_MSC_VER)
96#    define NULL __null
97#  else
98#    define NULL 0
99#  endif
100#else
101#  define NULL ((void*)0)
102#endif
103#ifdef __cplusplus
104#if defined(_MSC_EXTENSIONS) && defined(_NATIVE_NULLPTR_SUPPORTED)
105namespace std { typedef decltype(nullptr) nullptr_t; }
106using ::std::nullptr_t;
107#endif
108#endif
109#undef __need_NULL
110#endif /* defined(__need_NULL) */
111
112#if defined(__STDDEF_H)
113
114#if __STDC_VERSION__ >= 201112L || __cplusplus >= 201103L
115#if !defined(__CLANG_MAX_ALIGN_T_DEFINED) || __has_feature(modules)
116#ifndef _MSC_VER
117typedef struct {
118  long long __clang_max_align_nonce1
119      __attribute__((__aligned__(__alignof__(long long))));
120  long double __clang_max_align_nonce2
121      __attribute__((__aligned__(__alignof__(long double))));
122} max_align_t;
123#else
124typedef double max_align_t;
125#endif
126#define __CLANG_MAX_ALIGN_T_DEFINED
127#endif
128#endif
129
130#define offsetof(t, d) __builtin_offsetof(t, d)
131#endif  /* __STDDEF_H */
132
133/* Some C libraries expect to see a wint_t here. Others (notably MinGW) will use
134__WINT_TYPE__ directly; accommodate both by requiring __need_wint_t */
135#if defined(__need_wint_t)
136/* Always define wint_t when modules are available. */
137#if !defined(_WINT_T) || __has_feature(modules)
138#if !__has_feature(modules)
139#define _WINT_T
140#endif
141typedef __WINT_TYPE__ wint_t;
142#endif
143#undef __need_wint_t
144#endif /* __need_wint_t */
145
146#endif
147