#ifndef _STDDEF_H_
#define _STDDEF_H_

typedef int ptrdiff_t;

#ifndef _SIZE_T
#define _SIZE_T
typedef unsigned size_t;
#endif

#ifndef NULL
#define NULL    0
#endif

/* Offset of member MEMBER in a struct of type TYPE. */
#if defined(__GNUC__) && __GNUC__ > 3
#define offsetof(TYPE, MEMBER) __builtin_offsetof (TYPE, MEMBER)
#else
#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE*)0)->MEMBER)
#endif

#endif /* _STDDEF_H_ */