#include <sys/time.h>

#include <stdlib.h>

uint32_t seconds_from_midnight(datetime_t *datetime){
	uint32_t r;
	datetime_t dt;
	
	if (datetime){
		dt = *datetime;
		r = dt.second + (dt.minute*60) + (dt.hour * 3600l);
	} else {
		r = unixtime() % (86400l);
	};
	
	return r;
};