fix rounding issues that prevented UNKNOWN to work as soon as subsecond resolution...

git-svn-id: svn://svn.oetiker.ch/rrdtool/branches/1.2@668 a5681a0c-68f1-0310-ab6d-d61299d08faa

diff --git a/program/src/rrd_update.c b/program/src/rrd_update.c
index a776b7d519a3cf860fbb0f7fc62dad831bc16269..1b0cd9aa32d4fc8880873536df503f8b19bdf238 100644 (file)
--- a/program/src/rrd_update.c
+++ b/program/src/rrd_update.c
@@ -526,13 +526,15 @@ _rrd_update(char *filename, char *template, int argc, char **argv,
            double tmp;
            tmp = strtod(updvals[0], 0);
            current_time = floor(tmp);
-           current_time_usec = (long)((tmp - current_time) * 1000000L);
+           current_time_usec = (long)((tmp-(double)current_time) * 1000000.0);
        }
        /* dont do any correction for old version RRDs */
        if(version < 3) 
            current_time_usec = 0;
        
-       if(current_time <= rrd.live_head->last_up){
+       if(current_time < rrd.live_head->last_up || 
+         (current_time == rrd.live_head->last_up && 
+          (long)current_time_usec <= (long)rrd.live_head->last_up_usec)) {
            rrd_set_error("illegal attempt to update using time %ld when "
                          "last update time is %ld (minimum one second step)",
                          current_time, rrd.live_head->last_up);
@@ -561,12 +563,14 @@ _rrd_update(char *filename, char *template, int argc, char **argv,
        /* when did the last pdp_st occur */
        occu_pdp_age = current_time % rrd.stat_head->pdp_step;
        occu_pdp_st = current_time - occu_pdp_age;
+
        /* interval = current_time - rrd.live_head->last_up; */
-       interval    = current_time + ((double)current_time_usec - (double)rrd.live_head->last_up_usec)/1000000.0 - rrd.live_head->last_up;
-    
+       interval    = (double)(current_time - rrd.live_head->last_up) 
+                   + (double)((long)current_time_usec - (long)rrd.live_head->last_up_usec)/1000000.0;
+
        if (occu_pdp_st > proc_pdp_st){
            /* OK we passed the pdp_st moment*/
-           pre_int =  occu_pdp_st - rrd.live_head->last_up; /* how much of the input data
+           pre_int =  (long)occu_pdp_st - rrd.live_head->last_up; /* how much of the input data
                                                              * occurred before the latest
                                                              * pdp_st moment*/
            pre_int -= ((double)rrd.live_head->last_up_usec)/1000000.0; /* adjust usecs */
@@ -725,7 +729,7 @@ _rrd_update(char *filename, char *template, int argc, char **argv,
 
            for(i=0;i<rrd.stat_head->ds_cnt;i++){
                if(isnan(pdp_new[i]))
-                   rrd.pdp_prep[i].scratch[PDP_unkn_sec_cnt].u_cnt += interval;
+                   rrd.pdp_prep[i].scratch[PDP_unkn_sec_cnt].u_cnt += floor(interval-0.5);
                else
                    rrd.pdp_prep[i].scratch[PDP_val].u_val+= pdp_new[i];
 #ifdef DEBUG
@@ -749,10 +753,10 @@ _rrd_update(char *filename, char *template, int argc, char **argv,
            for(i=0;i<rrd.stat_head->ds_cnt;i++){
                /* update pdp_prep to the current pdp_st */
                if(isnan(pdp_new[i]))
-                   rrd.pdp_prep[i].scratch[PDP_unkn_sec_cnt].u_cnt += pre_int;
+                   rrd.pdp_prep[i].scratch[PDP_unkn_sec_cnt].u_cnt += floor(pre_int+0.5);
                else
                    rrd.pdp_prep[i].scratch[PDP_val].u_val += 
-                       pdp_new[i]/(double)interval*(double)pre_int;
+                       pdp_new[i]/interval*pre_int;
 
                /* if too much of the pdp_prep is unknown we dump it */
                if ((rrd.pdp_prep[i].scratch[PDP_unkn_sec_cnt].u_cnt 
@@ -763,8 +767,8 @@ _rrd_update(char *filename, char *template, int argc, char **argv,
                } else {
                    pdp_temp[i] = rrd.pdp_prep[i].scratch[PDP_val].u_val
                        / (double)( occu_pdp_st
-                                  - proc_pdp_st
-                                  - rrd.pdp_prep[i].scratch[PDP_unkn_sec_cnt].u_cnt);
+                                   - proc_pdp_st
+                                   - rrd.pdp_prep[i].scratch[PDP_unkn_sec_cnt].u_cnt);
                }
 
                /* process CDEF data sources; remember each CDEF DS can
@@ -789,12 +793,12 @@ _rrd_update(char *filename, char *template, int argc, char **argv,
         
                /* make pdp_prep ready for the next run */
                if(isnan(pdp_new[i])){
-                   rrd.pdp_prep[i].scratch[PDP_unkn_sec_cnt].u_cnt = post_int;
+                   rrd.pdp_prep[i].scratch[PDP_unkn_sec_cnt].u_cnt = floor(post_int + 0.5);
                    rrd.pdp_prep[i].scratch[PDP_val].u_val = 0.0;
                } else {
                    rrd.pdp_prep[i].scratch[PDP_unkn_sec_cnt].u_cnt = 0;
                    rrd.pdp_prep[i].scratch[PDP_val].u_val = 
-                       pdp_new[i]/(double)interval*(double)post_int;
+                       pdp_new[i]/interval*post_int;
                }
 
 #ifdef DEBUG