| | 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 | #undef NULL |
| | 30 | #ifdef __cplusplus |
| | 31 | #if __cplusplus >= 201103L |
| | 32 | #define NULL nullptr |
| | 33 | #else |
| | 34 | #undef __null // VC++ hack. |
| | 35 | #define NULL __null |
| | 36 | #endif |
| | 37 | #else |
| | 38 | #define NULL ((void*)0) |
| | 39 | #endif |
| | 40 | |
| | 41 | #ifndef _PTRDIFF_T |
| | 42 | #define _PTRDIFF_T |
| | 43 | typedef __typeof__(((int*)NULL)-((int*)NULL)) ptrdiff_t; |
| | 44 | #endif |
| | 45 | #ifndef _SIZE_T |
| | 46 | #define _SIZE_T |
| | 47 | typedef __typeof__(sizeof(int)) size_t; |
| | 48 | #endif |
| | 49 | #ifndef __cplusplus |
| | 50 | #ifndef _WCHAR_T |
| | 51 | #define _WCHAR_T |
| | 52 | typedef __WCHAR_TYPE__ wchar_t; |
| | 53 | #endif |
| | 54 | #endif |
| | 55 | |
| | 56 | #ifndef offsetof |
| | 57 | #define offsetof(t, d) __builtin_offsetof(t, d) |
| | 58 | #endif |
| | 59 | |
| | 60 | #endif /* __STDDEF_H */ |
| | 61 | |
| | 62 | /* Some C libraries expect to see a wint_t here. Others (notably MinGW) will use |
| | 63 | __WINT_TYPE__ directly; accommodate both by requiring __need_wint_t */ |
| | 64 | #if defined(__need_wint_t) |
| | 65 | #if !defined(_WINT_T) |
| | 66 | #define _WINT_T |
| | 67 | typedef __WINT_TYPE__ wint_t; |
| | 68 | #endif /* _WINT_T */ |
| | 69 | #undef __need_wint_t |
| | 70 | #endif /* __need_wint_t */ |
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