/****************************************************************************
- * RRDtool 1.2.99907080300 Copyright by Tobi Oetiker, 1997-2007
+ * RRDtool 1.3rc3 Copyright by Tobi Oetiker, 1997-2008
****************************************************************************
* rrd__graph.c produce graphs from data in rrdfiles
****************************************************************************/
lets set these to dummy values then ... */
if (im->logarithmic) {
- if (isnan(minval))
- minval = 0.2;
- if (isnan(maxval))
+ if (isnan(minval) || isnan(maxval) || maxval <= 0) {
+ minval = 0.0; /* catching this right away below */
maxval = 5.1;
+ }
+ /* in logarithm mode, where minval is smaller or equal
+ to 0 make the beast just way smaller than maxval */
+ if (minval <= 0) {
+ minval = maxval / 10e8;
+ }
} else {
- if (isnan(minval))
+ if (isnan(minval) || isnan(maxval)) {
minval = 0.0;
- if (isnan(maxval))
maxval = 1.0;
+ }
}
- /* adjust min and max values */
+ /* adjust min and max values given by the user*/
/* for logscale we add something on top */
if (isnan(im->minval)
|| ((!im->rigid) && im->minval > minval)
) {
if (im->logarithmic)
- im->minval = minval * 0.5;
+ im->minval = minval / 2.0;
else
im->minval = minval;
}
[GRC_FRAME].
blue, im->graph_col[GRC_FRAME].alpha);
if (im->gdes[i].dash) {
- // make box borders in legend dashed if the graph is dashed
+ /* make box borders in legend dashed if the graph is dashed */
double dashes[] = {
3.0
};
*ymin = walker->value.u_val;
} else if (strcmp(walker->key, "value_max") == 0) {
*ymax = walker->value.u_val;
- } else if (strncmp(walker->key, "print", 6) == 0) { /* keys are prdate[0..] */
+ } else if (strncmp(walker->key, "print", 5) == 0) { /* keys are prdate[0..] */
prlines++;
if (((*prdata) =
rrd_realloc((*prdata),
}
}
- if (im->logarithmic == 1 && im->minval <= 0) {
+ if (im->logarithmic && im->minval <= 0) {
rrd_set_error
("for a logarithmic yaxis you must specify a lower-limit > 0");
return;