Louis Pullen-Freilich | 2d89707 | 2020-01-30 14:59:03 +0000 | [diff] [blame] | 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(__STDDEF_H) || defined(__need_ptrdiff_t) || \ |
| 27 | defined(__need_size_t) || defined(__need_wchar_t) || \ |
| 28 | defined(__need_NULL) || defined(__need_wint_t) |
| 29 | |
| 30 | #if !defined(__need_ptrdiff_t) && !defined(__need_size_t) && \ |
| 31 | !defined(__need_wchar_t) && !defined(__need_NULL) && \ |
| 32 | !defined(__need_wint_t) |
| 33 | /* Always define miscellaneous pieces when modules are available. */ |
| 34 | #if !__has_feature(modules) |
| 35 | #define __STDDEF_H |
| 36 | #endif |
| 37 | #define __need_ptrdiff_t |
| 38 | #define __need_size_t |
| 39 | #define __need_wchar_t |
| 40 | #define __need_NULL |
| 41 | #define __need_STDDEF_H_misc |
| 42 | /* __need_wint_t is intentionally not defined here. */ |
| 43 | #endif |
| 44 | |
| 45 | #if defined(__need_ptrdiff_t) |
| 46 | #if !defined(_PTRDIFF_T) || __has_feature(modules) |
| 47 | /* Always define ptrdiff_t when modules are available. */ |
| 48 | #if !__has_feature(modules) |
| 49 | #define _PTRDIFF_T |
| 50 | #endif |
| 51 | typedef __PTRDIFF_TYPE__ ptrdiff_t; |
| 52 | #endif |
| 53 | #undef __need_ptrdiff_t |
| 54 | #endif /* defined(__need_ptrdiff_t) */ |
| 55 | |
| 56 | #if defined(__need_size_t) |
| 57 | #if !defined(_SIZE_T) || __has_feature(modules) |
| 58 | /* Always define size_t when modules are available. */ |
| 59 | #if !__has_feature(modules) |
| 60 | #define _SIZE_T |
| 61 | #endif |
| 62 | typedef __SIZE_TYPE__ size_t; |
| 63 | #endif |
| 64 | #undef __need_size_t |
| 65 | #endif /*defined(__need_size_t) */ |
| 66 | |
| 67 | #if defined(__need_STDDEF_H_misc) |
| 68 | /* ISO9899:2011 7.20 (C11 Annex K): Define rsize_t if __STDC_WANT_LIB_EXT1__ is |
| 69 | * enabled. */ |
| 70 | #if (defined(__STDC_WANT_LIB_EXT1__) && __STDC_WANT_LIB_EXT1__ >= 1 && \ |
| 71 | !defined(_RSIZE_T)) || __has_feature(modules) |
| 72 | /* Always define rsize_t when modules are available. */ |
| 73 | #if !__has_feature(modules) |
| 74 | #define _RSIZE_T |
| 75 | #endif |
| 76 | typedef __SIZE_TYPE__ rsize_t; |
| 77 | #endif |
| 78 | #endif /* defined(__need_STDDEF_H_misc) */ |
| 79 | |
| 80 | #if defined(__need_wchar_t) |
| 81 | #ifndef __cplusplus |
| 82 | /* Always define wchar_t when modules are available. */ |
| 83 | #if !defined(_WCHAR_T) || __has_feature(modules) |
| 84 | #if !__has_feature(modules) |
| 85 | #define _WCHAR_T |
| 86 | #if defined(_MSC_EXTENSIONS) |
| 87 | #define _WCHAR_T_DEFINED |
| 88 | #endif |
| 89 | #endif |
| 90 | typedef __WCHAR_TYPE__ wchar_t; |
| 91 | #endif |
| 92 | #endif |
| 93 | #undef __need_wchar_t |
| 94 | #endif /* defined(__need_wchar_t) */ |
| 95 | |
| 96 | #if defined(__need_NULL) |
| 97 | #undef NULL |
| 98 | #ifdef __cplusplus |
| 99 | # if !defined(__MINGW32__) && !defined(_MSC_VER) |
| 100 | # define NULL __null |
| 101 | # else |
| 102 | # define NULL 0 |
| 103 | # endif |
| 104 | #else |
| 105 | # define NULL ((void*)0) |
| 106 | #endif |
| 107 | #ifdef __cplusplus |
| 108 | #if defined(_MSC_EXTENSIONS) && defined(_NATIVE_NULLPTR_SUPPORTED) |
| 109 | namespace std { typedef decltype(nullptr) nullptr_t; } |
| 110 | using ::std::nullptr_t; |
| 111 | #endif |
| 112 | #endif |
| 113 | #undef __need_NULL |
| 114 | #endif /* defined(__need_NULL) */ |
| 115 | |
| 116 | #if defined(__need_STDDEF_H_misc) |
| 117 | #if __STDC_VERSION__ >= 201112L || __cplusplus >= 201103L |
| 118 | #include "__stddef_max_align_t.h" |
| 119 | #endif |
| 120 | #define offsetof(t, d) __builtin_offsetof(t, d) |
| 121 | #undef __need_STDDEF_H_misc |
| 122 | #endif /* defined(__need_STDDEF_H_misc) */ |
| 123 | |
| 124 | /* Some C libraries expect to see a wint_t here. Others (notably MinGW) will use |
| 125 | __WINT_TYPE__ directly; accommodate both by requiring __need_wint_t */ |
| 126 | #if defined(__need_wint_t) |
| 127 | /* Always define wint_t when modules are available. */ |
| 128 | #if !defined(_WINT_T) || __has_feature(modules) |
| 129 | #if !__has_feature(modules) |
| 130 | #define _WINT_T |
| 131 | #endif |
| 132 | typedef __WINT_TYPE__ wint_t; |
| 133 | #endif |
| 134 | #undef __need_wint_t |
| 135 | #endif /* __need_wint_t */ |
| 136 | |
| 137 | #endif |