include/stddef.h

   1 #ifndef _STDDEF_H
   2 #define _STDDEF_H
   3
   4 #if __cplusplus >= 201103L
   5 #define NULL nullptr
   6 #elif defined(__cplusplus)
   7 #define NULL 0L
   8 #else
   9 #define NULL ((void*)0)
  10 #endif
  11
  12 #define __NEED_ptrdiff_t
  13 #define __NEED_size_t
  14 #define __NEED_wchar_t
  15 #if __STDC_VERSION__ >= 201112L || __cplusplus >= 201103L
  16 #define __NEED_max_align_t
  17 #endif
  18
  19 #include <bits/alltypes.h>
  20
  21 #if __GNUC__ > 3
  22 #define offsetof(type, member) __builtin_offsetof(type, member)
  23 #else
  24 #define offsetof(type, member) ((size_t)( (char *)&(((type *)0)->member) - (char *)0 ))
  25 #endif
  26
  27 #endif