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