void compute_subject_downtime_times(time_t start_time, time_t end_time, avail_subject *subject, archived_state *sd) {
	archived_state *temp_as;
	time_t part_start_time;
	time_t part_subject_state;
	
	int save_status=0;
	int saved_status=0;
	int saved_stamp=0;
	int calc_temp=0;
	int count=0;
	archived_state *temp_before;
	archived_state *last;

#ifdef DEBUG2
	printf("<P><b>ENTERING COMPUTE_SUBJECT_DOWNTIME_TIMES: start=%lu, end=%lu, t1=%lu, t2=%lu </b></P>",start_time,end_time,t1,t2);
	/* OPSERVICES */
#endif
	//printf("<P><b>ENTERING COMPUTE_SUBJECT_DOWNTIME_TIMES: start=%lu, end=%lu, t1=%lu, t2=%lu </b></P>",start_time,end_time,t1,t2);

	/* times are weird, so bail out... */
	if(start_time>end_time)
		return;
	if(start_time<t1 || end_time>t2)
		return;
		
	/* find starting point in archived state list */
	if(sd==NULL) { 
#ifdef DEBUG2
		printf("<P>TEMP_AS=SUBJECT->AS_LIST </P>");
#endif
		temp_as=subject->as_list;
	}
	else if(sd->misc_ptr==NULL) {
#ifdef DEBUG2
		printf("<P>TEMP_AS=SUBJECT->AS_LIST</P>");
#endif
		temp_as=subject->as_list;
	}
	else if(sd->misc_ptr->next==NULL) {
#ifdef DEBUG2
		printf("<P>TEMP_AS=SD->MISC_PTR</P>");
#endif
		temp_as=sd->misc_ptr;
	}
	else {
#ifdef DEBUG2
		printf("<P>TEMP_AS=SD->MISC_PTR->NEXT</P>");
#endif
		temp_as=sd->misc_ptr->next;
	}

	/* initialize values */
	part_start_time=start_time;
	if(temp_as==NULL)
		part_subject_state=AS_NO_DATA;
	else if(temp_as->processed_state==AS_PROGRAM_START || temp_as->processed_state==AS_PROGRAM_END || temp_as->processed_state==AS_NO_DATA){
#ifdef DEBUG2
		printf("<P>ENTRY TYPE #1: %d</P>",temp_as->entry_type);
#endif
		part_subject_state=AS_NO_DATA;
	        }
	else{
#ifdef DEBUG2
		printf("<P>ENTRY TYPE #2: %d</P>",temp_as->entry_type);
#endif
		part_subject_state=temp_as->processed_state;
	        }

#ifdef DEBUG2
	printf("<P>TEMP_AS=%s</P>",(temp_as==NULL)?"NULL":"Not NULL");
	printf("<P>SD=%s</P>",(sd==NULL)?"NULL":"Not NULL");
#endif

	temp_before=NULL;
	saved_status=0;
	saved_stamp=0;
	count=0;
	//printf("<P> 0 <%ld> <%ld> <%ld> <%ld> <P>",count, start_time,end_time,part_subject_state);
	/* temp_as now points to first event to possibly "break" this chunk */
	//time_t start_time, time_t end_time
	for(;temp_as!=NULL;temp_as=temp_as->next) {
		count++;
		//if ( (temp_as->entry_type==AS_PROGRAM_END) || (temp_as->entry_type==AS_PROGRAM_START) ) {
		//	last=temp_as;
		//	continue;
		//}
		last=temp_as;
		if (temp_before==NULL) {
			if (last->time_stamp>start_time) {
				if (last->time_stamp>end_time) {
					//printf("<P> 1 <%ld> <%ld> <%ld> <%ld> <P>",count, start_time,last->time_stamp,part_subject_state);
					compute_subject_downtime_part_times(start_time,end_time,part_subject_state,subject);
				}
				else {
					//printf("<P> 1.1 <%ld> <%ld> <%ld> <%ld> <P>",count, start_time,last->time_stamp,part_subject_state);
					compute_subject_downtime_part_times(start_time,last->time_stamp,part_subject_state,subject);
				}
			}
			temp_before=temp_as;
			saved_status=temp_as->entry_type;
			saved_stamp=temp_as->time_stamp;
			/* Check if first time is before schedule downtime */
			if (saved_stamp<start_time) {
				saved_stamp=start_time;
			}
			continue;
		}
		/* is status changed, we hace to calculate */
		if (saved_status!=temp_as->entry_type) {
			if(temp_as->time_stamp>end_time) { // is outside schedule time, use end schdule downtime
				if (saved_stamp<start_time) {
					//printf(" <P> 2  <%ld> <%ld> <%ld> <%ld> <P>",count, saved_stamp,end_time,saved_status);
					compute_subject_downtime_part_times(start_time,end_time,saved_status,subject);
				}
				else {
					compute_subject_downtime_part_times(saved_stamp,end_time,saved_status,subject);
				}
			}
			else {
				if (saved_stamp<start_time) {
					//printf("<P> 3 <%ld> <%ld> <%ld> <%ld> <P>",count, saved_stamp,end_time,saved_status);
					compute_subject_downtime_part_times(start_time,temp_as->time_stamp,saved_status,subject);
				}
				else {
					compute_subject_downtime_part_times(saved_stamp,temp_as->time_stamp,saved_status,subject);
				}
			}
			saved_status=temp_as->entry_type;
			saved_stamp=temp_as->time_stamp;			
		}
	}
	if (count==0) { // just one entry inside the schdule downtime
		//printf("<P> 4 <%ld> <%ld> <%ld> <%ld> <P>",count, saved_stamp,end_time,saved_status);
		compute_subject_downtime_part_times(start_time,end_time,part_subject_state,subject);
	}
	else {
		if(last->time_stamp>end_time) { // is outside schedule time, use end schdule downtime
			//printf("<P> 5 <%ld> <%ld> <%ld> <%ld> <P>",count, saved_stamp,end_time,saved_status);
			compute_subject_downtime_part_times(saved_stamp,end_time,saved_status,subject);
		}
		else {
			//printf("<P> 6 <%ld> <%ld> <%ld> <%ld> <P>",count, saved_stamp,end_time,saved_status);
			compute_subject_downtime_part_times(saved_stamp,last->time_stamp,saved_status,subject);
		}
	}
	return;
}