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 #ifndef _PTRDIFF_T 30 #define _PTRDIFF_T 31 typedef __PTRDIFF_TYPE__ ptrdiff_t; 32 #endif 33 #ifndef _SIZE_T 34 #define _SIZE_T 35 typedef __SIZE_TYPE__ size_t; 36 #endif 37 #ifndef __cplusplus 38 #ifndef _WCHAR_T 39 #define _WCHAR_T 40 typedef __WCHAR_TYPE__ wchar_t; 41 #endif 42 #endif 43 44 #undef NULL 45 #ifdef __cplusplus 46 # if !defined(__MINGW32__) && !defined(_MSC_VER) 47 # define NULL __null 48 # else 49 # define NULL 0 50 # endif 51 #else 52 # define NULL ((void*)0) 53 #endif 54 55 #ifdef __cplusplus 56 #if defined(_MSC_EXTENSIONS) && defined(_NATIVE_NULLPTR_SUPPORTED) 57 namespace std { typedef decltype(nullptr) nullptr_t; } 58 using ::std::nullptr_t; 59 #endif 60 #endif 61 62 #define offsetof(t, d) __builtin_offsetof(t, d) 63 64 #endif /* __STDDEF_H */ 65 66 /* Some C libraries expect to see a wint_t here. Others (notably MinGW) will use 67 __WINT_TYPE__ directly; accommodate both by requiring __need_wint_t */ 68 #if defined(__need_wint_t) 69 #if !defined(_WINT_T) 70 #define _WINT_T 71 typedef __WINT_TYPE__ wint_t; 72 #endif /* _WINT_T */ 73 #undef __need_wint_t 74 #endif /* __need_wint_t */ 75
