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(__has_include) && __has_include(<__xnu_libcxx_sentinel.h>) && !defined(XNU_LIBCXX_SDKROOT))
27
28#if !__has_include_next(<stddef.h>)
29#error Do not build with -nostdinc (use GCC_USE_STANDARD_INCLUDE_SEARCHING=NO)
30#endif /* __has_include_next */
31
32#include_next <stddef.h>
33
34#else /* (defined(__has_include) && __has_include(<__xnu_libcxx_sentinel.h>) && !defined(XNU_LIBCXX_SDKROOT)) */
35
36#ifndef __STDDEF_H
37#define __STDDEF_H
38
39#undef NULL
40#ifdef __cplusplus
41#if __cplusplus >= 201103L
42#define NULL nullptr
43#else
44#undef __null // VC++ hack.
45#define NULL __null
46#endif
47#else
48#define NULL ((void*)0)
49#endif
50
51#ifndef _PTRDIFF_T
52#define _PTRDIFF_T
53typedef __typeof__(((int*)NULL) - ((int*)NULL)) ptrdiff_t;
54#endif
55#ifndef _SIZE_T
56#define _SIZE_T
57typedef __typeof__(sizeof(int)) size_t;
58#endif
59#ifndef __cplusplus
60#ifndef _WCHAR_T
61#define _WCHAR_T
62typedef __WCHAR_TYPE__ wchar_t;
63#endif
64#endif
65
66#ifndef offsetof
67#define offsetof(t, d) __builtin_offsetof(t, d)
68#endif
69
70#endif /* __STDDEF_H */
71
72/* Some C libraries expect to see a wint_t here. Others (notably MinGW) will
73 * use __WINT_TYPE__ directly; accommodate both by requiring __need_wint_t
74 */
75#if defined(__need_wint_t)
76#if !defined(_WINT_T)
77#define _WINT_T
78typedef __WINT_TYPE__ wint_t;
79#endif /* _WINT_T */
80#undef __need_wint_t
81#endif /* __need_wint_t */
82
83#endif
84