SECS_PER_HOUR
*out_time = posix_days * SECS_PER_DAY + hours * SECS_PER_HOUR +
*out_hours = leftover_seconds / SECS_PER_HOUR;
leftover_seconds %= SECS_PER_HOUR;
#define SECS_PER_DAY (int64_t)(24 * SECS_PER_HOUR)
} else if (in >= SECS_PER_HOUR ){
in /= SECS_PER_HOUR;