stv
stv = NULL;
stv = &tv;
stv = NULL;
if ( (init && stv != NULL)
if ( (init && (stv != NULL || stz != NULL))
|| (stz != NULL && stv == NULL)
if (stv != NULL) {
stv = &tv;
if (settimeofday(stv, stz)) {
struct timeval tv, *stv;
stv(integer_size, p, value);