fix border condition in rra selection of rrd_fetch

-- Stanislav Sinyagin <ssinyagin@yahoo.com>

git-svn-id: svn://svn.oetiker.ch/rrdtool/trunk/program@172 a5681a0c-68f1-0310-ab6d-d61299d08faa

diff --git a/src/rrd_fetch.c b/src/rrd_fetch.c
index 3260904ea30502e59856d627e5a214db4f7ec7a7..d5c5709450a1febd6e3c7522a0d4f2e0e3de5260 100644 (file)
--- a/src/rrd_fetch.c
+++ b/src/rrd_fetch.c
@@ -5,6 +5,10 @@
  *****************************************************************************
  * $Id$
  * $Log$
+ * Revision 1.6  2003/01/16 23:27:54  oetiker
+ * fix border condition in rra selection of rrd_fetch
+ * -- Stanislav Sinyagin <ssinyagin@yahoo.com>
+ *
  * Revision 1.5  2002/06/23 22:29:40  alex
  * Added "step=1800" and such to "DEF"
  * Cleaned some of the signed vs. unsigned problems
@@ -222,11 +226,12 @@ fprintf(stderr,"Considering: start %10lu end %10lu step %5lu ",
                                                        cal_start,cal_end,
                        rrd.stat_head->pdp_step * rrd.rra_def[i].pdp_cnt);
 #endif
+           /* we need step difference in either full or partial case */
+           tmp_step_diff = labs(*step - (rrd.stat_head->pdp_step
+                                          * rrd.rra_def[i].pdp_cnt));
            /* best full match */
            if(cal_end >= *end 
               && cal_start <= *start){
-               tmp_step_diff = labs(*step - (rrd.stat_head->pdp_step
-                                        * rrd.rra_def[i].pdp_cnt));
                if (first_full || (tmp_step_diff < best_step_diff)){
                    first_full=0;
                    best_step_diff = tmp_step_diff;
@@ -247,12 +252,16 @@ fprintf(stderr,"full match, not best\n");
                    tmp_match -= (cal_start-*start);
                if (cal_end<*end)
                    tmp_match -= (*end-cal_end);                
-               if (first_part || best_match < tmp_match){
+               if (first_part ||
+                    (best_match < tmp_match) ||
+                    (best_match == tmp_match && 
+                     tmp_step_diff < best_step_diff)){ 
 #ifdef DEBUG
 fprintf(stderr,"best partial so far\n");
 #endif
                    first_part=0;
                    best_match = tmp_match;
+                   best_step_diff = tmp_step_diff;
                    best_part_rra =i;
                } else {
 #ifdef DEBUG