src/include/stddef.h

   1 #ifndef STDDEF_H
   2 #define STDDEF_H
   3
   4 FILE_LICENCE ( GPL2_ONLY );
   5
   6 /* for size_t */
   7 #include <stdint.h>
   8
   9 #undef NULL
  10 #define NULL ((void *)0)
  11
  12 #undef offsetof
  13 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
  14
  15 #undef container_of
  16 #define container_of(ptr, type, member) ({                      \
  17         const typeof( ((type *)0)->member ) *__mptr = (ptr);    \
  18         (type *)( (char *)__mptr - offsetof(type,member) );})
  19
  20 /* __WCHAR_TYPE__ is defined by gcc and will change if -fshort-wchar is used */
  21 #ifndef __WCHAR_TYPE__
  22 #define __WCHAR_TYPE__ long int
  23 #endif
  24 typedef __WCHAR_TYPE__ wchar_t;
  25
  26 #endif /* STDDEF_H */