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(__has_include) && __has_include(<__xnu_libcxx_sentinel.h>) && !defined(XNU_LIBCXX_SDKROOT)) 27 28 #if !__has_include_next(<stddef.h>) 29 #error Do not build with -nostdinc (use GCC_USE_STANDARD_INCLUDE_SEARCHING=NO) 30 #endif /* __has_include_next */ 31 32 #include_next <stddef.h> 33 34 #else /* (defined(__has_include) && __has_include(<__xnu_libcxx_sentinel.h>) && !defined(XNU_LIBCXX_SDKROOT)) */ 35 36 #ifndef __STDDEF_H 37 #define __STDDEF_H 38 39 #undef NULL 40 #ifdef __cplusplus 41 #if __cplusplus >= 201103L 42 #define NULL nullptr 43 #else 44 #undef __null // VC++ hack. 45 #define NULL __null 46 #endif 47 #else 48 #define NULL ((void*)0) 49 #endif 50 51 #ifndef _PTRDIFF_T 52 #define _PTRDIFF_T 53 typedef __typeof__(((int*)NULL) - ((int*)NULL)) ptrdiff_t; 54 #endif 55 #ifndef _SIZE_T 56 #define _SIZE_T 57 typedef __typeof__(sizeof(int)) size_t; 58 #endif 59 #ifndef __cplusplus 60 #ifndef _WCHAR_T 61 #define _WCHAR_T 62 typedef __WCHAR_TYPE__ wchar_t; 63 #endif 64 #endif 65 66 #ifndef offsetof 67 #define offsetof(t, d) __builtin_offsetof(t, d) 68 #endif 69 70 #endif /* __STDDEF_H */ 71 72 /* Some C libraries expect to see a wint_t here. Others (notably MinGW) will 73 * use __WINT_TYPE__ directly; accommodate both by requiring __need_wint_t 74 */ 75 #if defined(__need_wint_t) 76 #if !defined(_WINT_T) 77 #define _WINT_T 78 typedef __WINT_TYPE__ wint_t; 79 #endif /* _WINT_T */ 80 #undef __need_wint_t 81 #endif /* __need_wint_t */ 82 83 #endif 84