1991-03-29 00:28:29 +08:00
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#ifndef _STDDEF_H
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#define _STDDEF_H
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/* Signed type of difference of two pointers. */
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typedef long ptrdiff_t;
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/* Unsigned type of `sizeof' something. */
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1991-04-20 12:25:09 +09:00
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/* in case <sys/types.h> has defined it. */
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/* DECstation uses _SIZE_T_. */
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#if !defined (_SIZE_T) && !defined (_SIZE_T_)
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1991-03-29 00:28:29 +08:00
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#define _SIZE_T
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typedef unsigned long size_t;
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#endif /* _SIZE_T */
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/* A null pointer constant. */
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#undef NULL /* in case <stdio.h> has defined it. */
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#define NULL 0
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/* Offset of member MEMBER in a struct of type TYPE. */
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#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
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#endif /* _STDDEF_H */
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