include/stddef.h

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