extern void *memset(void *, int, long unsigned int);
#define BINARY(a, op, b) a op b
#define PTR_BINARY(a, op, b) ((void*)(a) op (unsigned long)(b))
#define MEMZERO(obj) memset(&obj, 0, sizeof(obj))
#define FIELDPTR(sptr, field) (&(sptr -> field))