countof
#define countof(x) (sizeof(x)/sizeof((x)[0]))
#define countof(x) (sizeof((x)) / sizeof((x)[0]))
#define countof(x) (sizeof((x)) / sizeof((x)[0]))
#define countof(x) (sizeof(x) / sizeof((x)[0]))
#define countof(x) (sizeof(x) / sizeof((x)[0]))
#define countof(x) (sizeof((x)) / sizeof((x)[0]))
#define countof(x) (sizeof(x) / sizeof((x)[0]))