55 lines
1.5 KiB
C
55 lines
1.5 KiB
C
#ifndef VLIBC_STDDEF_H
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#define VLIBC_STDDEF_H
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/*
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* vlibc — <stddef.h>.
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*
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* Self-contained definitions of the common C types and macros (C23). Every
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* definition here is derived from compiler builtins, so this header never
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* borrows from a system header.
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*
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* The compatibility profile is exposed by include/vlibc/features.h; it is
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* included here so consumers always see the configured VLIBC_LEVEL.
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*/
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#include <vlibc/features.h>
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/* Integer type of the result of the sizeof operator. */
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typedef __SIZE_TYPE__ size_t;
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/* Signed integer type of the difference of two pointers. */
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typedef __PTRDIFF_TYPE__ ptrdiff_t;
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/* Wide character type; a C++ keyword there, so no redefinition. */
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#ifndef __cplusplus
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typedef __WCHAR_TYPE__ wchar_t;
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#endif
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/* Type of the null pointer constant nullptr (C23); a C++ keyword there. */
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#if !defined(__cplusplus) && defined(__STDC_VERSION__) && __STDC_VERSION__ >= 202311L
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typedef typeof(nullptr) nullptr_t;
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#endif
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/* Null pointer constant. */
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#define NULL ((void *)0)
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/* Offset in bytes of a member from the start of its enclosing object. */
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#define offsetof(type, m) __builtin_offsetof(type, m)
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/* Mark the following point of the program as unreachable (C23). */
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#if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 202311L
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#define unreachable() __builtin_unreachable()
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#endif
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/*
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* An object type whose alignment is as great as that of any supported
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* fundamental type; suitable as the storage type for aligned allocation.
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*/
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typedef struct
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{
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long long vll;
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long double vld;
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} max_align_t;
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#endif /* VLIBC_STDDEF_H */
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