28 lines
656 B
C
28 lines
656 B
C
|
/* 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) (unsigned long) &((type *)0)->ident)
|
||
|
|
|
||
|
|
#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 */
|