31 lines
743 B
C
31 lines
743 B
C
/* The <stddef.h> header defines certain commonly used macros. */
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#ifndef _STDDEF_H
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#define _STDDEF_H
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#include <sys/null.h>
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/* The following is not portable, but the compiler accepts it. */
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#ifdef __GNUC__
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#define offsetof(type, ident) __builtin_offsetof (type, ident)
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#else
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#define offsetof(type, ident) ((size_t) (unsigned long) &((type *)0)->ident)
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#endif
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#if _EM_PSIZE == _EM_WSIZE
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typedef int ptrdiff_t; /* result of subtracting two pointers */
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#else /* _EM_PSIZE == _EM_LSIZE */
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typedef long ptrdiff_t;
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#endif
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#ifndef _SIZE_T
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#define _SIZE_T
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typedef unsigned int size_t; /* type returned by sizeof */
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#endif
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#ifndef _WCHAR_T
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#define _WCHAR_T
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typedef char wchar_t; /* type expanded character set */
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#endif
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#endif /* _STDDEF_H */
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