Minix1.5/include/stddef.h

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/* The <stddef.h> header defines certain commonly used macros. */

#ifndef _STDDEF_H
#define _STDDEF_H

#define NULL   ((void *)0)

/* The following is not portable, but the compiler accepts it. */
#define offsetof(type, ident)		((size_t) &(((type *)0)->ident))

typedef int ptrdiff_t;		/* result of subtracting two pointers */

#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 */