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Ying Wangb335bb02011-11-29 10:23:55 -08001/*===---- 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#ifndef __STDDEF_H
27#define __STDDEF_H
28
Stephen Hines996e4dc2013-08-13 01:04:14 -070029#if !defined(_PTRDIFF_T) || __has_feature(modules)
30/* Always define ptrdiff_t when modules are available. */
31#if !__has_feature(modules)
Ying Wangb335bb02011-11-29 10:23:55 -080032#define _PTRDIFF_T
Stephen Hines996e4dc2013-08-13 01:04:14 -070033#endif
Stephen Hinesc6ee7df2013-04-02 18:41:57 -070034typedef __PTRDIFF_TYPE__ ptrdiff_t;
Ying Wangb335bb02011-11-29 10:23:55 -080035#endif
Stephen Hines996e4dc2013-08-13 01:04:14 -070036
37#if !defined(_SIZE_T) || __has_feature(modules)
38/* Always define size_t when modules are available. */
39#if !__has_feature(modules)
Ying Wangb335bb02011-11-29 10:23:55 -080040#define _SIZE_T
Stephen Hines996e4dc2013-08-13 01:04:14 -070041#endif
Stephen Hinesc6ee7df2013-04-02 18:41:57 -070042typedef __SIZE_TYPE__ size_t;
Ying Wangb335bb02011-11-29 10:23:55 -080043#endif
Stephen Hines996e4dc2013-08-13 01:04:14 -070044
45/* ISO9899:2011 7.20 (C11 Annex K): Define rsize_t if __STDC_WANT_LIB_EXT1__ is
46 * enabled. */
47#if (defined(__STDC_WANT_LIB_EXT1__) && __STDC_WANT_LIB_EXT1__ >= 1 && \
48 !defined(_RSIZE_T)) || __has_feature(modules)
49/* Always define rsize_t when modules are available. */
50#if !__has_feature(modules)
51#define _RSIZE_T
52#endif
53typedef __SIZE_TYPE__ rsize_t;
54#endif
55
Ying Wangb335bb02011-11-29 10:23:55 -080056#ifndef __cplusplus
Stephen Hines996e4dc2013-08-13 01:04:14 -070057/* Always define wchar_t when modules are available. */
58#if !defined(_WCHAR_T) || __has_feature(modules)
59#if !__has_feature(modules)
Ying Wangb335bb02011-11-29 10:23:55 -080060#define _WCHAR_T
Stephen Hines996e4dc2013-08-13 01:04:14 -070061#if defined(_MSC_EXTENSIONS)
62#define _WCHAR_T_DEFINED
63#endif
64#endif
Ying Wangb335bb02011-11-29 10:23:55 -080065typedef __WCHAR_TYPE__ wchar_t;
66#endif
67#endif
68
69#undef NULL
70#ifdef __cplusplus
Ying Wang60999142013-01-07 13:59:36 -080071# if !defined(__MINGW32__) && !defined(_MSC_VER)
72# define NULL __null
73# else
74# define NULL 0
75# endif
Ying Wangb335bb02011-11-29 10:23:55 -080076#else
Ying Wang60999142013-01-07 13:59:36 -080077# define NULL ((void*)0)
78#endif
79
80#ifdef __cplusplus
81#if defined(_MSC_EXTENSIONS) && defined(_NATIVE_NULLPTR_SUPPORTED)
82namespace std { typedef decltype(nullptr) nullptr_t; }
83using ::std::nullptr_t;
84#endif
Ying Wangb335bb02011-11-29 10:23:55 -080085#endif
86
87#define offsetof(t, d) __builtin_offsetof(t, d)
88
89#endif /* __STDDEF_H */
90
91/* Some C libraries expect to see a wint_t here. Others (notably MinGW) will use
92__WINT_TYPE__ directly; accommodate both by requiring __need_wint_t */
93#if defined(__need_wint_t)
Stephen Hines996e4dc2013-08-13 01:04:14 -070094/* Always define wint_t when modules are available. */
95#if !defined(_WINT_T) || __has_feature(modules)
96#if !__has_feature(modules)
Ying Wangb335bb02011-11-29 10:23:55 -080097#define _WINT_T
Stephen Hines996e4dc2013-08-13 01:04:14 -070098#endif
Ying Wangb335bb02011-11-29 10:23:55 -080099typedef __WINT_TYPE__ wint_t;
Stephen Hines996e4dc2013-08-13 01:04:14 -0700100#endif
Ying Wangb335bb02011-11-29 10:23:55 -0800101#undef __need_wint_t
102#endif /* __need_wint_t */