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| 1 | /* The <stddef.h> header defines certain commonly used macros. */
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| 2 |
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| 3 | #ifndef _STDDEF_H
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| 4 | #define _STDDEF_H
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| 5 |
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| 6 | #define NULL ((void *)0)
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| 7 |
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| 8 | /* The following is not portable, but the compiler accepts it. */
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| 9 | #define offsetof(type, ident) ((size_t) (unsigned long) &((type *)0)->ident)
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| 10 |
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| 11 | #if _EM_PSIZE == _EM_WSIZE
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| 12 | typedef int ptrdiff_t; /* result of subtracting two pointers */
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| 13 | #else /* _EM_PSIZE == _EM_LSIZE */
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| 14 | typedef long ptrdiff_t;
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| 15 | #endif
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| 16 |
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| 17 | #ifndef _SIZE_T
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| 18 | #define _SIZE_T
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| 19 | typedef unsigned int size_t; /* type returned by sizeof */
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| 20 | #endif
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| 21 |
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| 22 | #ifndef _WCHAR_T
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| 23 | #define _WCHAR_T
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| 24 | typedef char wchar_t; /* type expanded character set */
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| 25 | #endif
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| 26 |
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| 27 | #endif /* _STDDEF_H */
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