* better fix for units-exponent issue ... now the whole scaling happens only at

  print time ... this is more stable -- tobi

* remove the newline from ctime (%c) in VDEF -- alex

git-svn-id: svn://svn.oetiker.ch/rrdtool/branches/1.2/program@400 a5681a0c-68f1-0310-ab6d-d61299d08faa

diff --git a/src/rrd_graph.c b/src/rrd_graph.c
index 95e3ed670628b1f91cb589fa0bad885b2481d34e..3840c2d09b7e4a8a217604a4b4bcd611a1f740fd 100644 (file)
--- a/src/rrd_graph.c
+++ b/src/rrd_graph.c
@@ -1,4 +1,4 @@
-/****************************************************************************
+/strfcmp/****************************************************************************
  * RRDtool 1.2rc7  Copyright by Tobi Oetiker, 1997-2005
  ****************************************************************************
  * rrd__graph.c  produce graphs from data in rrdfiles
@@ -329,23 +329,30 @@ si_unit(
                     'E'};/* 10e18  Exa */
 
     int   symbcenter = 6;
-    double digits;  
+    double digits,viewdigits=0;  
     
+    digits = floor( log( max( fabs(im->minval),fabs(im->maxval)))/log((double)im->base)); 
+
     if (im->unitsexponent != 9999) {
        /* unitsexponent = 9, 6, 3, 0, -3, -6, -9, etc */
-        digits = floor(im->unitsexponent / 3);
+        viewdigits = floor(im->unitsexponent / 3);
     } else {
-        digits = floor( log( max( fabs(im->minval),fabs(im->maxval)))/log((double)im->base)); 
+       viewdigits = digits;
     }
+
     im->magfact = pow((double)im->base , digits);
     
 #ifdef DEBUG
     printf("digits %6.3f  im->magfact %6.3f\n",digits,im->magfact);
 #endif
 
-    if ( ((digits+symbcenter) < sizeof(symbol)) &&
-                   ((digits+symbcenter) >= 0) )
-        im->symbol = symbol[(int)digits+symbcenter];
+    im->viewfactor = im->magfact / pow((double)im->base , viewdigits);
+
+    pow((double)im->base , viewdigits);
+
+    if ( ((viewdigits+symbcenter) < sizeof(symbol)) &&
+                   ((viewdigits+symbcenter) >= 0) )
+        im->symbol = symbol[(int)viewdigits+symbcenter];
     else
        im->symbol = '?';
  }
@@ -1289,14 +1296,16 @@ print_calc(image_desc_t *im, char ***prdata)
 
            if (!strcmp(im->gdes[i].format,"%c")) { /* VDEF time print */
                char ctime_buf[128]; /* PS: for ctime_r, must be >= 26 chars */
+               int iii=0;
+               ctime_r(&printtime,ctime_buf); 
+               while(isprint(ctime_buf[iii])){iii++};
+               ctime_buf[iii]='\0';
                if (im->gdes[i].gf == GF_PRINT){
                    (*prdata)[prlines-2] = malloc((FMT_LEG_LEN+2)*sizeof(char));
-                   sprintf((*prdata)[prlines-2],"%s (%lu)",
-                                       ctime_r(&printtime,ctime_buf),printtime);
+                   sprintf((*prdata)[prlines-2],"%s (%lu)",ctime_buf,printtime);
                    (*prdata)[prlines-1] = NULL;
                } else {
-                   sprintf(im->gdes[i].legend,"%s (%lu)",
-                                       ctime_r(&printtime,ctime_buf),printtime);
+                   sprintf(im->gdes[i].legend,"%s (%lu)",ctime_buf,printtime);
                    graphelement = 1;
                }
            } else {
@@ -1610,19 +1619,19 @@ int draw_horizontal_grid(image_desc_t *im)
                if (i==0 || im->symbol == ' ') {
                    if(scaledstep < 1){
                        if(im->extra_flags & ALTYGRID) {
-                           sprintf(graph_label,im->ygrid_scale.labfmt,scaledstep*i);
+                           sprintf(graph_label,im->ygrid_scale.labfmt,scaledstep*im->viewfactor*i);
                        }
                        else {
-                           sprintf(graph_label,"%4.1f",scaledstep*i);
+                           sprintf(graph_label,"%4.1f",scaledstep*im->viewfactor*i);
                        }
                    } else {
-                       sprintf(graph_label,"%4.0f",scaledstep*i);
+                       sprintf(graph_label,"%4.0f",scaledstep*im->viewfactor*i);
                    }
                }else {
                    if(scaledstep < 1){
-                       sprintf(graph_label,"%4.1f %c",scaledstep*i, im->symbol);
+                       sprintf(graph_label,"%4.1f %c",scaledstep*im->viewfactor*i, im->symbol);
                    } else {
-                       sprintf(graph_label,"%4.0f %c",scaledstep*i, im->symbol);
+                       sprintf(graph_label,"%4.0f %c",scaledstep*im->viewfactor*i, im->symbol);
                    }
                }
 
@@ -2754,6 +2763,8 @@ rrd_graph_init(image_desc_t *im)
     im->maxval = DNAN;    
     im->unitsexponent= 9999;
     im->unitslength= 5; 
+    im->symbol = ' ';
+    im->viewfactor = 1.0;
     im->extra_flags= 0;
     im->rigid = 0;
     im->gridfit = 1;
@@ -2789,6 +2800,7 @@ rrd_graph_init(image_desc_t *im)
                             strncpy(text_prop[i].font,rrd_win_default_font,sizeof(text_prop[i].font)-1);
                             text_prop[i].font[sizeof(text_prop[i].font)-1] = '\0';
                      }
+             }
     }
 #endif
     {

diff --git a/src/rrd_graph.h b/src/rrd_graph.h
index cf9964562a4e1c7e4fe7fc437b76efd735278d3f..58af260d532fa2f12b9006ad366058f6243faff6 100644 (file)
--- a/src/rrd_graph.h
+++ b/src/rrd_graph.h
@@ -182,6 +182,7 @@ typedef struct image_desc_t {
     double         magfact;        /* numerical magnitude*/
     long         base;            /* 1000 or 1024 depending on what we graph */
     char           symbol;         /* magnitude symbol for y-axis */
+    float          viewfactor;     /* how should the numbers on the y-axis be scaled for viewing ? */
     int            unitsexponent;    /* 10*exponent for units on y-asis */
     int            unitslength;    /* width of the yaxis labels */
     int            extra_flags;    /* flags for boolean options */