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| Rev | Author | Line No. | Line |
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| 14 | pmbaty | 1 | /*===---- stddef.h - Basic type definitions --------------------------------=== |
| 2 | * |
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| 3 | * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | * See https://llvm.org/LICENSE.txt for license information. |
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| 5 | * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | * |
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| 7 | *===-----------------------------------------------------------------------=== |
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| 8 | */ |
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| 9 | |||
| 10 | #if !defined(__STDDEF_H) || defined(__need_ptrdiff_t) || \ |
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| 11 | defined(__need_size_t) || defined(__need_wchar_t) || \ |
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| 12 | defined(__need_NULL) || defined(__need_wint_t) |
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| 13 | |||
| 14 | #if !defined(__need_ptrdiff_t) && !defined(__need_size_t) && \ |
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| 15 | !defined(__need_wchar_t) && !defined(__need_NULL) && \ |
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| 16 | !defined(__need_wint_t) |
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| 17 | /* Always define miscellaneous pieces when modules are available. */ |
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| 18 | #if !__has_feature(modules) |
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| 19 | #define __STDDEF_H |
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| 20 | #endif |
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| 21 | #define __need_ptrdiff_t |
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| 22 | #define __need_size_t |
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| 23 | #define __need_wchar_t |
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| 24 | #define __need_NULL |
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| 25 | #define __need_STDDEF_H_misc |
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| 26 | /* __need_wint_t is intentionally not defined here. */ |
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| 27 | #endif |
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| 28 | |||
| 29 | #if defined(__need_ptrdiff_t) |
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| 30 | #if !defined(_PTRDIFF_T) || __has_feature(modules) |
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| 31 | /* Always define ptrdiff_t when modules are available. */ |
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| 32 | #if !__has_feature(modules) |
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| 33 | #define _PTRDIFF_T |
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| 34 | #endif |
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| 35 | typedef __PTRDIFF_TYPE__ ptrdiff_t; |
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| 36 | #endif |
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| 37 | #undef __need_ptrdiff_t |
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| 38 | #endif /* defined(__need_ptrdiff_t) */ |
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| 39 | |||
| 40 | #if defined(__need_size_t) |
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| 41 | #if !defined(_SIZE_T) || __has_feature(modules) |
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| 42 | /* Always define size_t when modules are available. */ |
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| 43 | #if !__has_feature(modules) |
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| 44 | #define _SIZE_T |
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| 45 | #endif |
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| 46 | typedef __SIZE_TYPE__ size_t; |
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| 47 | #endif |
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| 48 | #undef __need_size_t |
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| 49 | #endif /*defined(__need_size_t) */ |
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| 50 | |||
| 51 | #if defined(__need_STDDEF_H_misc) |
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| 52 | /* ISO9899:2011 7.20 (C11 Annex K): Define rsize_t if __STDC_WANT_LIB_EXT1__ is |
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| 53 | * enabled. */ |
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| 54 | #if (defined(__STDC_WANT_LIB_EXT1__) && __STDC_WANT_LIB_EXT1__ >= 1 && \ |
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| 55 | !defined(_RSIZE_T)) || __has_feature(modules) |
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| 56 | /* Always define rsize_t when modules are available. */ |
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| 57 | #if !__has_feature(modules) |
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| 58 | #define _RSIZE_T |
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| 59 | #endif |
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| 60 | typedef __SIZE_TYPE__ rsize_t; |
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| 61 | #endif |
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| 62 | #endif /* defined(__need_STDDEF_H_misc) */ |
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| 63 | |||
| 64 | #if defined(__need_wchar_t) |
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| 65 | #if !defined(__cplusplus) || (defined(_MSC_VER) && !_NATIVE_WCHAR_T_DEFINED) |
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| 66 | /* Always define wchar_t when modules are available. */ |
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| 67 | #if !defined(_WCHAR_T) || __has_feature(modules) |
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| 68 | #if !__has_feature(modules) |
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| 69 | #define _WCHAR_T |
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| 70 | #if defined(_MSC_EXTENSIONS) |
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| 71 | #define _WCHAR_T_DEFINED |
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| 72 | #endif |
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| 73 | #endif |
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| 74 | typedef __WCHAR_TYPE__ wchar_t; |
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| 75 | #endif |
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| 76 | #endif |
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| 77 | #undef __need_wchar_t |
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| 78 | #endif /* defined(__need_wchar_t) */ |
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| 79 | |||
| 80 | #if defined(__need_NULL) |
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| 81 | #undef NULL |
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| 82 | #ifdef __cplusplus |
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| 83 | # if !defined(__MINGW32__) && !defined(_MSC_VER) |
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| 84 | # define NULL __null |
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| 85 | # else |
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| 86 | # define NULL 0 |
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| 87 | # endif |
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| 88 | #else |
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| 89 | # define NULL ((void*)0) |
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| 90 | #endif |
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| 91 | #ifdef __cplusplus |
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| 92 | #if defined(_MSC_EXTENSIONS) && defined(_NATIVE_NULLPTR_SUPPORTED) |
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| 93 | namespace std { typedef decltype(nullptr) nullptr_t; } |
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| 94 | using ::std::nullptr_t; |
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| 95 | #endif |
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| 96 | #endif |
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| 97 | #undef __need_NULL |
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| 98 | #endif /* defined(__need_NULL) */ |
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| 99 | |||
| 100 | /* FIXME: This is using the placeholder dates Clang produces for these macros |
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| 101 | in C2x mode; switch to the correct values once they've been published. */ |
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| 102 | #if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 202000L |
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| 103 | typedef typeof(nullptr) nullptr_t; |
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| 104 | #endif /* defined(__STDC_VERSION__) && __STDC_VERSION__ >= 202000L */ |
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| 105 | |||
| 106 | #if defined(__need_STDDEF_H_misc) |
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| 107 | #if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L) || \ |
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| 108 | (defined(__cplusplus) && __cplusplus >= 201103L) |
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| 109 | #include "__stddef_max_align_t.h" |
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| 110 | #endif |
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| 111 | #define offsetof(t, d) __builtin_offsetof(t, d) |
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| 112 | #undef __need_STDDEF_H_misc |
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| 113 | #endif /* defined(__need_STDDEF_H_misc) */ |
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| 114 | |||
| 115 | /* Some C libraries expect to see a wint_t here. Others (notably MinGW) will use |
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| 116 | __WINT_TYPE__ directly; accommodate both by requiring __need_wint_t */ |
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| 117 | #if defined(__need_wint_t) |
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| 118 | /* Always define wint_t when modules are available. */ |
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| 119 | #if !defined(_WINT_T) || __has_feature(modules) |
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| 120 | #if !__has_feature(modules) |
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| 121 | #define _WINT_T |
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| 122 | #endif |
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| 123 | typedef __WINT_TYPE__ wint_t; |
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| 124 | #endif |
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| 125 | #undef __need_wint_t |
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| 126 | #endif /* __need_wint_t */ |
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| 127 | |||
| 128 | #endif |