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 #ifndef __STDDEF_H 27 #define __STDDEF_H 28 29 #if !defined(_PTRDIFF_T) || __has_feature(modules) 30 /* Always define ptrdiff_t when modules are available. */ 31 #if !__has_feature(modules) 32 #define _PTRDIFF_T 33 #endif 34 typedef __PTRDIFF_TYPE__ ptrdiff_t; 35 #endif 36 37 #if !defined(_SIZE_T) || __has_feature(modules) 38 /* Always define size_t when modules are available. */ 39 #if !__has_feature(modules) 40 #define _SIZE_T 41 #endif 42 typedef __SIZE_TYPE__ size_t; 43 #endif 44 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 53 typedef __SIZE_TYPE__ rsize_t; 54 #endif 55 56 #ifndef __cplusplus 57 /* Always define wchar_t when modules are available. */ 58 #if !defined(_WCHAR_T) || __has_feature(modules) 59 #if !__has_feature(modules) 60 #define _WCHAR_T 61 #if defined(_MSC_EXTENSIONS) 62 #define _WCHAR_T_DEFINED 63 #endif 64 #endif 65 typedef __WCHAR_TYPE__ wchar_t; 66 #endif 67 #endif 68 69 #undef NULL 70 #ifdef __cplusplus 71 # if !defined(__MINGW32__) && !defined(_MSC_VER) 72 # define NULL __null 73 # else 74 # define NULL 0 75 # endif 76 #else 77 # define NULL ((void*)0) 78 #endif 79 80 #ifdef __cplusplus 81 #if defined(_MSC_EXTENSIONS) && defined(_NATIVE_NULLPTR_SUPPORTED) 82 namespace std { typedef decltype(nullptr) nullptr_t; } 83 using ::std::nullptr_t; 84 #endif 85 #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) 94 /* Always define wint_t when modules are available. */ 95 #if !defined(_WINT_T) || __has_feature(modules) 96 #if !__has_feature(modules) 97 #define _WINT_T 98 #endif 99 typedef __WINT_TYPE__ wint_t; 100 #endif 101 #undef __need_wint_t 102 #endif /* __need_wint_t */ 103
