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 typedef __typeof__(((int*)0)-((int*)0)) ptrdiff_t; 30 #ifndef _SIZE_T 31 #define _SIZE_T 32 typedef __typeof__(sizeof(int)) size_t; 33 #endif 34 #ifndef __cplusplus 35 #ifndef _WCHAR_T 36 #define _WCHAR_T 37 typedef __typeof__(*L"") wchar_t; 38 #endif 39 #endif 40 41 #undef NULL 42 #ifdef __cplusplus 43 #undef __null // VC++ hack. 44 #define NULL __null 45 #else 46 #define NULL ((void*)0) 47 #endif 48 49 // Some C libraries expect to see a wint_t here. Others (notably MinGW) will use 50 // __WINT_TYPE__ directly; accomodate both by requiring __need_wint_t 51 #if defined(__need_wint_t) && !defined(_WINT_T) 52 #define _WINT_T 53 typedef __WINT_TYPE__ wint_t; 54 #endif 55 56 #define offsetof(t, d) __builtin_offsetof(t, d) 57 58 #endif /* __STDDEF_H */ 59
