stddef.h revision 251662
1193326Sed/*===---- stddef.h - Basic type definitions --------------------------------=== 2193326Sed * 3193326Sed * Copyright (c) 2008 Eli Friedman 4193326Sed * 5193326Sed * Permission is hereby granted, free of charge, to any person obtaining a copy 6193326Sed * of this software and associated documentation files (the "Software"), to deal 7193326Sed * in the Software without restriction, including without limitation the rights 8193326Sed * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9193326Sed * copies of the Software, and to permit persons to whom the Software is 10193326Sed * furnished to do so, subject to the following conditions: 11193326Sed * 12193326Sed * The above copyright notice and this permission notice shall be included in 13193326Sed * all copies or substantial portions of the Software. 14193326Sed * 15193326Sed * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16193326Sed * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17193326Sed * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 18193326Sed * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19193326Sed * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20193326Sed * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 21193326Sed * THE SOFTWARE. 22193326Sed * 23193326Sed *===-----------------------------------------------------------------------=== 24193326Sed */ 25193326Sed 26193326Sed#ifndef __STDDEF_H 27193326Sed#define __STDDEF_H 28193326Sed 29249423Sdim#if !defined(_PTRDIFF_T) || __has_feature(modules) 30249423Sdim/* Always define ptrdiff_t when modules are available. */ 31249423Sdim#if !__has_feature(modules) 32221345Sdim#define _PTRDIFF_T 33221345Sdim#endif 34249423Sdimtypedef __PTRDIFF_TYPE__ ptrdiff_t; 35249423Sdim#endif 36249423Sdim 37249423Sdim#if !defined(_SIZE_T) || __has_feature(modules) 38249423Sdim/* Always define size_t when modules are available. */ 39249423Sdim#if !__has_feature(modules) 40204962Srdivacky#define _SIZE_T 41204962Srdivacky#endif 42249423Sdimtypedef __SIZE_TYPE__ size_t; 43249423Sdim#endif 44249423Sdim 45251662Sdim/* ISO9899:2011 7.20 (C11 Annex K): Define rsize_t if __STDC_WANT_LIB_EXT1__ is 46251662Sdim * enabled. */ 47251662Sdim#if (defined(__STDC_WANT_LIB_EXT1__) && __STDC_WANT_LIB_EXT1__ >= 1 && \ 48251662Sdim !defined(_RSIZE_T)) || __has_feature(modules) 49251662Sdim/* Always define rsize_t when modules are available. */ 50251662Sdim#if !__has_feature(modules) 51251662Sdim#define _RSIZE_T 52251662Sdim#endif 53251662Sdimtypedef __SIZE_TYPE__ rsize_t; 54251662Sdim#endif 55251662Sdim 56193326Sed#ifndef __cplusplus 57249423Sdim/* Always define wchar_t when modules are available. */ 58249423Sdim#if !defined(_WCHAR_T) || __has_feature(modules) 59249423Sdim#if !__has_feature(modules) 60204962Srdivacky#define _WCHAR_T 61251662Sdim#if defined(_MSC_EXTENSIONS) 62251662Sdim#define _WCHAR_T_DEFINED 63249423Sdim#endif 64251662Sdim#endif 65212904Sdimtypedef __WCHAR_TYPE__ wchar_t; 66193326Sed#endif 67204962Srdivacky#endif 68193326Sed 69204962Srdivacky#undef NULL 70193326Sed#ifdef __cplusplus 71239462Sdim# if !defined(__MINGW32__) && !defined(_MSC_VER) 72239462Sdim# define NULL __null 73239462Sdim# else 74239462Sdim# define NULL 0 75239462Sdim# endif 76193326Sed#else 77239462Sdim# define NULL ((void*)0) 78193326Sed#endif 79193326Sed 80239462Sdim#ifdef __cplusplus 81239462Sdim#if defined(_MSC_EXTENSIONS) && defined(_NATIVE_NULLPTR_SUPPORTED) 82239462Sdimnamespace std { typedef decltype(nullptr) nullptr_t; } 83239462Sdimusing ::std::nullptr_t; 84239462Sdim#endif 85239462Sdim#endif 86239462Sdim 87193326Sed#define offsetof(t, d) __builtin_offsetof(t, d) 88193326Sed 89193326Sed#endif /* __STDDEF_H */ 90218893Sdim 91218893Sdim/* Some C libraries expect to see a wint_t here. Others (notably MinGW) will use 92221345Sdim__WINT_TYPE__ directly; accommodate both by requiring __need_wint_t */ 93218893Sdim#if defined(__need_wint_t) 94249423Sdim/* Always define wint_t when modules are available. */ 95249423Sdim#if !defined(_WINT_T) || __has_feature(modules) 96249423Sdim#if !__has_feature(modules) 97218893Sdim#define _WINT_T 98249423Sdim#endif 99218893Sdimtypedef __WINT_TYPE__ wint_t; 100249423Sdim#endif 101218893Sdim#undef __need_wint_t 102218893Sdim#endif /* __need_wint_t */ 103