1/*===---- stddef.h - Basic type definitions --------------------------------===
2 *
3 * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 * See https://llvm.org/LICENSE.txt for license information.
5 * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 *
7 *===-----------------------------------------------------------------------===
8 */
9
10#if !defined(__STDDEF_H) || defined(__need_ptrdiff_t) ||                       \
11    defined(__need_size_t) || defined(__need_wchar_t) ||                       \
12    defined(__need_NULL) || defined(__need_wint_t)
13
14#if !defined(__need_ptrdiff_t) && !defined(__need_size_t) &&                   \
15    !defined(__need_wchar_t) && !defined(__need_NULL) &&                       \
16    !defined(__need_wint_t)
17/* Always define miscellaneous pieces when modules are available. */
18#if !__has_feature(modules)
19#define __STDDEF_H
20#endif
21#define __need_ptrdiff_t
22#define __need_size_t
23#define __need_wchar_t
24#define __need_NULL
25#define __need_STDDEF_H_misc
26/* __need_wint_t is intentionally not defined here. */
27#endif
28
29#if defined(__need_ptrdiff_t)
30#if !defined(_PTRDIFF_T) || __has_feature(modules)
31/* Always define ptrdiff_t when modules are available. */
32#if !__has_feature(modules)
33#define _PTRDIFF_T
34#endif
35typedef __PTRDIFF_TYPE__ ptrdiff_t;
36#endif
37#undef __need_ptrdiff_t
38#endif /* defined(__need_ptrdiff_t) */
39
40#if defined(__need_size_t)
41#if !defined(_SIZE_T) || __has_feature(modules)
42/* Always define size_t when modules are available. */
43#if !__has_feature(modules)
44#define _SIZE_T
45#endif
46typedef __SIZE_TYPE__ size_t;
47#endif
48#undef __need_size_t
49#endif /*defined(__need_size_t) */
50
51#if defined(__need_STDDEF_H_misc)
52/* ISO9899:2011 7.20 (C11 Annex K): Define rsize_t if __STDC_WANT_LIB_EXT1__ is
53 * enabled. */
54#if (defined(__STDC_WANT_LIB_EXT1__) && __STDC_WANT_LIB_EXT1__ >= 1 && \
55     !defined(_RSIZE_T)) || __has_feature(modules)
56/* Always define rsize_t when modules are available. */
57#if !__has_feature(modules)
58#define _RSIZE_T
59#endif
60typedef __SIZE_TYPE__ rsize_t;
61#endif
62#endif /* defined(__need_STDDEF_H_misc) */
63
64#if defined(__need_wchar_t)
65#ifndef __cplusplus
66/* Always define wchar_t when modules are available. */
67#if !defined(_WCHAR_T) || __has_feature(modules)
68#if !__has_feature(modules)
69#define _WCHAR_T
70#if defined(_MSC_EXTENSIONS)
71#define _WCHAR_T_DEFINED
72#endif
73#endif
74typedef __WCHAR_TYPE__ wchar_t;
75#endif
76#endif
77#undef __need_wchar_t
78#endif /* defined(__need_wchar_t) */
79
80#if defined(__need_NULL)
81#undef NULL
82#ifdef __cplusplus
83#  if !defined(__MINGW32__) && !defined(_MSC_VER)
84#    define NULL __null
85#  else
86#    define NULL 0
87#  endif
88#else
89#  define NULL ((void*)0)
90#endif
91#ifdef __cplusplus
92#if defined(_MSC_EXTENSIONS) && defined(_NATIVE_NULLPTR_SUPPORTED)
93namespace std { typedef decltype(nullptr) nullptr_t; }
94using ::std::nullptr_t;
95#endif
96#endif
97#undef __need_NULL
98#endif /* defined(__need_NULL) */
99
100#if defined(__need_STDDEF_H_misc)
101#if __STDC_VERSION__ >= 201112L || __cplusplus >= 201103L
102#include "__stddef_max_align_t.h"
103#endif
104#define offsetof(t, d) __builtin_offsetof(t, d)
105#undef __need_STDDEF_H_misc
106#endif  /* defined(__need_STDDEF_H_misc) */
107
108/* Some C libraries expect to see a wint_t here. Others (notably MinGW) will use
109__WINT_TYPE__ directly; accommodate both by requiring __need_wint_t */
110#if defined(__need_wint_t)
111/* Always define wint_t when modules are available. */
112#if !defined(_WINT_T) || __has_feature(modules)
113#if !__has_feature(modules)
114#define _WINT_T
115#endif
116typedef __WINT_TYPE__ wint_t;
117#endif
118#undef __need_wint_t
119#endif /* __need_wint_t */
120
121#endif
122