minix/include/stddef.h

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