1 /****************************************************************************
2 * RRDtool 1.2.4 Copyright by Tobi Oetiker, 1997-2005
3 ****************************************************************************
4 * rrd__graph.c produce graphs from data in rrdfiles
5 ****************************************************************************/
12 #if defined(WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
25 #include "rrd_graph.h"
27 /* some constant definitions */
31 #ifndef RRD_DEFAULT_FONT
32 /* there is special code later to pick Cour.ttf when running on windows */
33 #define RRD_DEFAULT_FONT "DejaVuSansMono-Roman.ttf"
36 text_prop_t text_prop[] = {
37 { 8.0, RRD_DEFAULT_FONT }, /* default */
38 { 9.0, RRD_DEFAULT_FONT }, /* title */
39 { 7.0, RRD_DEFAULT_FONT }, /* axis */
40 { 8.0, RRD_DEFAULT_FONT }, /* unit */
41 { 8.0, RRD_DEFAULT_FONT } /* legend */
45 {0, TMT_SECOND,30, TMT_MINUTE,5, TMT_MINUTE,5, 0,"%H:%M"},
46 {2, TMT_MINUTE,1, TMT_MINUTE,5, TMT_MINUTE,5, 0,"%H:%M"},
47 {5, TMT_MINUTE,2, TMT_MINUTE,10, TMT_MINUTE,10, 0,"%H:%M"},
48 {10, TMT_MINUTE,5, TMT_MINUTE,20, TMT_MINUTE,20, 0,"%H:%M"},
49 {30, TMT_MINUTE,10, TMT_HOUR,1, TMT_HOUR,1, 0,"%H:%M"},
50 {60, TMT_MINUTE,30, TMT_HOUR,2, TMT_HOUR,2, 0,"%H:%M"},
51 {180, TMT_HOUR,1, TMT_HOUR,6, TMT_HOUR,6, 0,"%H:%M"},
52 /*{300, TMT_HOUR,3, TMT_HOUR,12, TMT_HOUR,12, 12*3600,"%a %p"}, this looks silly*/
53 {600, TMT_HOUR,6, TMT_DAY,1, TMT_DAY,1, 24*3600,"%a"},
54 {1800, TMT_HOUR,12, TMT_DAY,1, TMT_DAY,2, 24*3600,"%a"},
55 {3600, TMT_DAY,1, TMT_WEEK,1, TMT_WEEK,1, 7*24*3600,"Week %V"},
56 {3*3600, TMT_WEEK,1, TMT_MONTH,1, TMT_WEEK,2, 7*24*3600,"Week %V"},
57 {6*3600, TMT_MONTH,1, TMT_MONTH,1, TMT_MONTH,1, 30*24*3600,"%b"},
58 {48*3600, TMT_MONTH,1, TMT_MONTH,3, TMT_MONTH,3, 30*24*3600,"%b"},
59 {10*24*3600, TMT_YEAR,1, TMT_YEAR,1, TMT_YEAR,1, 365*24*3600,"%y"},
60 {-1,TMT_MONTH,0,TMT_MONTH,0,TMT_MONTH,0,0,""}
63 /* sensible logarithmic y label intervals ...
64 the first element of each row defines the possible starting points on the
65 y axis ... the other specify the */
67 double yloglab[][12]= {{ 1e9, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
68 { 1e3, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
69 { 1e1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
70 /* { 1e1, 1, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, */
71 { 1e1, 1, 2.5, 5, 7.5, 0, 0, 0, 0, 0, 0, 0 },
72 { 1e1, 1, 2, 4, 6, 8, 0, 0, 0, 0, 0, 0 },
73 { 1e1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0 },
74 { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }};
76 /* sensible y label intervals ...*/
94 gfx_color_t graph_col[] = /* default colors */
95 { 0xFFFFFFFF, /* canvas */
96 0xF0F0F0FF, /* background */
97 0xD0D0D0FF, /* shade A */
98 0xA0A0A0FF, /* shade B */
99 0x90909080, /* grid */
100 0xE0505080, /* major grid */
101 0x000000FF, /* font */
102 0x802020FF, /* arrow */
103 0x202020FF /* axis */
110 # define DPRINT(x) (void)(printf x, printf("\n"))
116 /* initialize with xtr(im,0); */
118 xtr(image_desc_t *im,time_t mytime){
121 pixie = (double) im->xsize / (double)(im->end - im->start);
124 return (int)((double)im->xorigin
125 + pixie * ( mytime - im->start ) );
128 /* translate data values into y coordinates */
130 ytr(image_desc_t *im, double value){
135 pixie = (double) im->ysize / (im->maxval - im->minval);
137 pixie = (double) im->ysize / (log10(im->maxval) - log10(im->minval));
139 } else if(!im->logarithmic) {
140 yval = im->yorigin - pixie * (value - im->minval);
142 if (value < im->minval) {
145 yval = im->yorigin - pixie * (log10(value) - log10(im->minval));
148 /* make sure we don't return anything too unreasonable. GD lib can
149 get terribly slow when drawing lines outside its scope. This is
150 especially problematic in connection with the rigid option */
152 /* keep yval as-is */
153 } else if (yval > im->yorigin) {
155 } else if (yval < im->yorigin - im->ysize){
156 yval = im->yorigin - im->ysize;
163 /* conversion function for symbolic entry names */
166 #define conv_if(VV,VVV) \
167 if (strcmp(#VV, string) == 0) return VVV ;
169 enum gf_en gf_conv(char *string){
171 conv_if(PRINT,GF_PRINT)
172 conv_if(GPRINT,GF_GPRINT)
173 conv_if(COMMENT,GF_COMMENT)
174 conv_if(HRULE,GF_HRULE)
175 conv_if(VRULE,GF_VRULE)
176 conv_if(LINE,GF_LINE)
177 conv_if(AREA,GF_AREA)
178 conv_if(STACK,GF_STACK)
179 conv_if(TICK,GF_TICK)
181 conv_if(CDEF,GF_CDEF)
182 conv_if(VDEF,GF_VDEF)
184 conv_if(PART,GF_PART)
186 conv_if(XPORT,GF_XPORT)
187 conv_if(SHIFT,GF_SHIFT)
192 enum gfx_if_en if_conv(char *string){
202 enum tmt_en tmt_conv(char *string){
204 conv_if(SECOND,TMT_SECOND)
205 conv_if(MINUTE,TMT_MINUTE)
206 conv_if(HOUR,TMT_HOUR)
208 conv_if(WEEK,TMT_WEEK)
209 conv_if(MONTH,TMT_MONTH)
210 conv_if(YEAR,TMT_YEAR)
214 enum grc_en grc_conv(char *string){
216 conv_if(BACK,GRC_BACK)
217 conv_if(CANVAS,GRC_CANVAS)
218 conv_if(SHADEA,GRC_SHADEA)
219 conv_if(SHADEB,GRC_SHADEB)
220 conv_if(GRID,GRC_GRID)
221 conv_if(MGRID,GRC_MGRID)
222 conv_if(FONT,GRC_FONT)
223 conv_if(ARROW,GRC_ARROW)
224 conv_if(AXIS,GRC_AXIS)
229 enum text_prop_en text_prop_conv(char *string){
231 conv_if(DEFAULT,TEXT_PROP_DEFAULT)
232 conv_if(TITLE,TEXT_PROP_TITLE)
233 conv_if(AXIS,TEXT_PROP_AXIS)
234 conv_if(UNIT,TEXT_PROP_UNIT)
235 conv_if(LEGEND,TEXT_PROP_LEGEND)
243 im_free(image_desc_t *im)
247 if (im == NULL) return 0;
248 for(i=0;i<(unsigned)im->gdes_c;i++){
249 if (im->gdes[i].data_first){
250 /* careful here, because a single pointer can occur several times */
251 free (im->gdes[i].data);
252 if (im->gdes[i].ds_namv){
253 for (ii=0;ii<im->gdes[i].ds_cnt;ii++)
254 free(im->gdes[i].ds_namv[ii]);
255 free(im->gdes[i].ds_namv);
258 free (im->gdes[i].p_data);
259 free (im->gdes[i].rpnp);
262 gfx_destroy(im->canvas);
266 /* find SI magnitude symbol for the given number*/
269 image_desc_t *im, /* image description */
276 char *symbol[] = {"a", /* 10e-18 Atto */
277 "f", /* 10e-15 Femto */
278 "p", /* 10e-12 Pico */
279 "n", /* 10e-9 Nano */
280 "u", /* 10e-6 Micro */
281 "m", /* 10e-3 Milli */
286 "T", /* 10e12 Tera */
287 "P", /* 10e15 Peta */
293 if (*value == 0.0 || isnan(*value) ) {
297 sindex = floor(log(fabs(*value))/log((double)im->base));
298 *magfact = pow((double)im->base, (double)sindex);
299 (*value) /= (*magfact);
301 if ( sindex <= symbcenter && sindex >= -symbcenter) {
302 (*symb_ptr) = symbol[sindex+symbcenter];
310 /* find SI magnitude symbol for the numbers on the y-axis*/
313 image_desc_t *im /* image description */
317 char symbol[] = {'a', /* 10e-18 Atto */
318 'f', /* 10e-15 Femto */
319 'p', /* 10e-12 Pico */
320 'n', /* 10e-9 Nano */
321 'u', /* 10e-6 Micro */
322 'm', /* 10e-3 Milli */
327 'T', /* 10e12 Tera */
328 'P', /* 10e15 Peta */
332 double digits,viewdigits=0;
334 digits = floor( log( max( fabs(im->minval),fabs(im->maxval)))/log((double)im->base));
336 if (im->unitsexponent != 9999) {
337 /* unitsexponent = 9, 6, 3, 0, -3, -6, -9, etc */
338 viewdigits = floor(im->unitsexponent / 3);
343 im->magfact = pow((double)im->base , digits);
346 printf("digits %6.3f im->magfact %6.3f\n",digits,im->magfact);
349 im->viewfactor = im->magfact / pow((double)im->base , viewdigits);
351 pow((double)im->base , viewdigits);
353 if ( ((viewdigits+symbcenter) < sizeof(symbol)) &&
354 ((viewdigits+symbcenter) >= 0) )
355 im->symbol = symbol[(int)viewdigits+symbcenter];
360 /* move min and max values around to become sensible */
363 expand_range(image_desc_t *im)
365 double sensiblevalues[] ={1000.0,900.0,800.0,750.0,700.0,
366 600.0,500.0,400.0,300.0,250.0,
367 200.0,125.0,100.0,90.0,80.0,
368 75.0,70.0,60.0,50.0,40.0,30.0,
369 25.0,20.0,10.0,9.0,8.0,
370 7.0,6.0,5.0,4.0,3.5,3.0,
371 2.5,2.0,1.8,1.5,1.2,1.0,
372 0.8,0.7,0.6,0.5,0.4,0.3,0.2,0.1,0.0,-1};
374 double scaled_min,scaled_max;
381 printf("Min: %6.2f Max: %6.2f MagFactor: %6.2f\n",
382 im->minval,im->maxval,im->magfact);
385 if (isnan(im->ygridstep)){
386 if(im->extra_flags & ALTAUTOSCALE) {
387 /* measure the amplitude of the function. Make sure that
388 graph boundaries are slightly higher then max/min vals
389 so we can see amplitude on the graph */
392 delt = im->maxval - im->minval;
394 fact = 2.0 * pow(10.0,
395 floor(log10(max(fabs(im->minval), fabs(im->maxval)))) - 2);
397 adj = (fact - delt) * 0.55;
399 printf("Min: %6.2f Max: %6.2f delt: %6.2f fact: %6.2f adj: %6.2f\n", im->minval, im->maxval, delt, fact, adj);
405 else if(im->extra_flags & ALTAUTOSCALE_MAX) {
406 /* measure the amplitude of the function. Make sure that
407 graph boundaries are slightly higher than max vals
408 so we can see amplitude on the graph */
409 adj = (im->maxval - im->minval) * 0.1;
413 scaled_min = im->minval / im->magfact;
414 scaled_max = im->maxval / im->magfact;
416 for (i=1; sensiblevalues[i] > 0; i++){
417 if (sensiblevalues[i-1]>=scaled_min &&
418 sensiblevalues[i]<=scaled_min)
419 im->minval = sensiblevalues[i]*(im->magfact);
421 if (-sensiblevalues[i-1]<=scaled_min &&
422 -sensiblevalues[i]>=scaled_min)
423 im->minval = -sensiblevalues[i-1]*(im->magfact);
425 if (sensiblevalues[i-1] >= scaled_max &&
426 sensiblevalues[i] <= scaled_max)
427 im->maxval = sensiblevalues[i-1]*(im->magfact);
429 if (-sensiblevalues[i-1]<=scaled_max &&
430 -sensiblevalues[i] >=scaled_max)
431 im->maxval = -sensiblevalues[i]*(im->magfact);
433 /* no sensiblevalues found. we switch to ALTYGRID mode */
434 if (sensiblevalues[i] == 0){
435 im->extra_flags |= ALTYGRID;
439 /* adjust min and max to the grid definition if there is one */
440 im->minval = (double)im->ylabfact * im->ygridstep *
441 floor(im->minval / ((double)im->ylabfact * im->ygridstep));
442 im->maxval = (double)im->ylabfact * im->ygridstep *
443 ceil(im->maxval /( (double)im->ylabfact * im->ygridstep));
447 fprintf(stderr,"SCALED Min: %6.2f Max: %6.2f Factor: %6.2f\n",
448 im->minval,im->maxval,im->magfact);
453 apply_gridfit(image_desc_t *im)
455 if (isnan(im->minval) || isnan(im->maxval))
458 if (im->logarithmic) {
459 double ya, yb, ypix, ypixfrac;
460 double log10_range = log10(im->maxval) - log10(im->minval);
461 ya = pow((double)10, floor(log10(im->minval)));
462 while (ya < im->minval)
465 return; /* don't have y=10^x gridline */
467 if (yb <= im->maxval) {
468 /* we have at least 2 y=10^x gridlines.
469 Make sure distance between them in pixels
470 are an integer by expanding im->maxval */
471 double y_pixel_delta = ytr(im, ya) - ytr(im, yb);
472 double factor = y_pixel_delta / floor(y_pixel_delta);
473 double new_log10_range = factor * log10_range;
474 double new_ymax_log10 = log10(im->minval) + new_log10_range;
475 im->maxval = pow(10, new_ymax_log10);
476 ytr(im, DNAN); /* reset precalc */
477 log10_range = log10(im->maxval) - log10(im->minval);
479 /* make sure first y=10^x gridline is located on
480 integer pixel position by moving scale slightly
481 downwards (sub-pixel movement) */
482 ypix = ytr(im, ya) + im->ysize; /* add im->ysize so it always is positive */
483 ypixfrac = ypix - floor(ypix);
484 if (ypixfrac > 0 && ypixfrac < 1) {
485 double yfrac = ypixfrac / im->ysize;
486 im->minval = pow(10, log10(im->minval) - yfrac * log10_range);
487 im->maxval = pow(10, log10(im->maxval) - yfrac * log10_range);
488 ytr(im, DNAN); /* reset precalc */
491 /* Make sure we have an integer pixel distance between
492 each minor gridline */
493 double ypos1 = ytr(im, im->minval);
494 double ypos2 = ytr(im, im->minval + im->ygrid_scale.gridstep);
495 double y_pixel_delta = ypos1 - ypos2;
496 double factor = y_pixel_delta / floor(y_pixel_delta);
497 double new_range = factor * (im->maxval - im->minval);
498 double gridstep = im->ygrid_scale.gridstep;
499 double minor_y, minor_y_px, minor_y_px_frac;
500 im->maxval = im->minval + new_range;
501 ytr(im, DNAN); /* reset precalc */
502 /* make sure first minor gridline is on integer pixel y coord */
503 minor_y = gridstep * floor(im->minval / gridstep);
504 while (minor_y < im->minval)
506 minor_y_px = ytr(im, minor_y) + im->ysize; /* ensure > 0 by adding ysize */
507 minor_y_px_frac = minor_y_px - floor(minor_y_px);
508 if (minor_y_px_frac > 0 && minor_y_px_frac < 1) {
509 double yfrac = minor_y_px_frac / im->ysize;
510 double range = im->maxval - im->minval;
511 im->minval = im->minval - yfrac * range;
512 im->maxval = im->maxval - yfrac * range;
513 ytr(im, DNAN); /* reset precalc */
515 calc_horizontal_grid(im); /* recalc with changed im->maxval */
519 /* reduce data reimplementation by Alex */
523 enum cf_en cf, /* which consolidation function ?*/
524 unsigned long cur_step, /* step the data currently is in */
525 time_t *start, /* start, end and step as requested ... */
526 time_t *end, /* ... by the application will be ... */
527 unsigned long *step, /* ... adjusted to represent reality */
528 unsigned long *ds_cnt, /* number of data sources in file */
529 rrd_value_t **data) /* two dimensional array containing the data */
531 int i,reduce_factor = ceil((double)(*step) / (double)cur_step);
532 unsigned long col,dst_row,row_cnt,start_offset,end_offset,skiprows=0;
533 rrd_value_t *srcptr,*dstptr;
535 (*step) = cur_step*reduce_factor; /* set new step size for reduced data */
538 row_cnt = ((*end)-(*start))/cur_step;
544 printf("Reducing %lu rows with factor %i time %lu to %lu, step %lu\n",
545 row_cnt,reduce_factor,*start,*end,cur_step);
546 for (col=0;col<row_cnt;col++) {
547 printf("time %10lu: ",*start+(col+1)*cur_step);
548 for (i=0;i<*ds_cnt;i++)
549 printf(" %8.2e",srcptr[*ds_cnt*col+i]);
554 /* We have to combine [reduce_factor] rows of the source
555 ** into one row for the destination. Doing this we also
556 ** need to take care to combine the correct rows. First
557 ** alter the start and end time so that they are multiples
558 ** of the new step time. We cannot reduce the amount of
559 ** time so we have to move the end towards the future and
560 ** the start towards the past.
562 end_offset = (*end) % (*step);
563 start_offset = (*start) % (*step);
565 /* If there is a start offset (which cannot be more than
566 ** one destination row), skip the appropriate number of
567 ** source rows and one destination row. The appropriate
568 ** number is what we do know (start_offset/cur_step) of
569 ** the new interval (*step/cur_step aka reduce_factor).
572 printf("start_offset: %lu end_offset: %lu\n",start_offset,end_offset);
573 printf("row_cnt before: %lu\n",row_cnt);
576 (*start) = (*start)-start_offset;
577 skiprows=reduce_factor-start_offset/cur_step;
578 srcptr+=skiprows* *ds_cnt;
579 for (col=0;col<(*ds_cnt);col++) *dstptr++ = DNAN;
583 printf("row_cnt between: %lu\n",row_cnt);
586 /* At the end we have some rows that are not going to be
587 ** used, the amount is end_offset/cur_step
590 (*end) = (*end)-end_offset+(*step);
591 skiprows = end_offset/cur_step;
595 printf("row_cnt after: %lu\n",row_cnt);
598 /* Sanity check: row_cnt should be multiple of reduce_factor */
599 /* if this gets triggered, something is REALLY WRONG ... we die immediately */
601 if (row_cnt%reduce_factor) {
602 printf("SANITY CHECK: %lu rows cannot be reduced by %i \n",
603 row_cnt,reduce_factor);
604 printf("BUG in reduce_data()\n");
608 /* Now combine reduce_factor intervals at a time
609 ** into one interval for the destination.
612 for (dst_row=0;(long int)row_cnt>=reduce_factor;dst_row++) {
613 for (col=0;col<(*ds_cnt);col++) {
614 rrd_value_t newval=DNAN;
615 unsigned long validval=0;
617 for (i=0;i<reduce_factor;i++) {
618 if (isnan(srcptr[i*(*ds_cnt)+col])) {
622 if (isnan(newval)) newval = srcptr[i*(*ds_cnt)+col];
630 newval += srcptr[i*(*ds_cnt)+col];
633 newval = min (newval,srcptr[i*(*ds_cnt)+col]);
636 /* an interval contains a failure if any subintervals contained a failure */
638 newval = max (newval,srcptr[i*(*ds_cnt)+col]);
641 newval = srcptr[i*(*ds_cnt)+col];
646 if (validval == 0){newval = DNAN;} else{
664 srcptr+=(*ds_cnt)*reduce_factor;
665 row_cnt-=reduce_factor;
667 /* If we had to alter the endtime, we didn't have enough
668 ** source rows to fill the last row. Fill it with NaN.
670 if (end_offset) for (col=0;col<(*ds_cnt);col++) *dstptr++ = DNAN;
672 row_cnt = ((*end)-(*start))/ *step;
674 printf("Done reducing. Currently %lu rows, time %lu to %lu, step %lu\n",
675 row_cnt,*start,*end,*step);
676 for (col=0;col<row_cnt;col++) {
677 printf("time %10lu: ",*start+(col+1)*(*step));
678 for (i=0;i<*ds_cnt;i++)
679 printf(" %8.2e",srcptr[*ds_cnt*col+i]);
686 /* get the data required for the graphs from the
690 data_fetch(image_desc_t *im )
695 /* pull the data from the log files ... */
696 for (i=0;i< (int)im->gdes_c;i++){
697 /* only GF_DEF elements fetch data */
698 if (im->gdes[i].gf != GF_DEF)
702 /* do we have it already ?*/
703 for (ii=0;ii<i;ii++) {
704 if (im->gdes[ii].gf != GF_DEF)
706 if ((strcmp(im->gdes[i].rrd, im->gdes[ii].rrd) == 0)
707 && (im->gdes[i].cf == im->gdes[ii].cf)
708 && (im->gdes[i].cf_reduce == im->gdes[ii].cf_reduce)
709 && (im->gdes[i].start == im->gdes[ii].start)
710 && (im->gdes[i].end == im->gdes[ii].end)
711 && (im->gdes[i].step == im->gdes[ii].step)) {
712 /* OK, the data is already there.
713 ** Just copy the header portion
715 im->gdes[i].start = im->gdes[ii].start;
716 im->gdes[i].end = im->gdes[ii].end;
717 im->gdes[i].step = im->gdes[ii].step;
718 im->gdes[i].ds_cnt = im->gdes[ii].ds_cnt;
719 im->gdes[i].ds_namv = im->gdes[ii].ds_namv;
720 im->gdes[i].data = im->gdes[ii].data;
721 im->gdes[i].data_first = 0;
728 unsigned long ft_step = im->gdes[i].step ;
730 if((rrd_fetch_fn(im->gdes[i].rrd,
736 &im->gdes[i].ds_namv,
737 &im->gdes[i].data)) == -1){
740 im->gdes[i].data_first = 1;
741 im->gdes[i].step = im->step;
743 if (ft_step < im->gdes[i].step) {
744 reduce_data(im->gdes[i].cf_reduce,
752 im->gdes[i].step = ft_step;
756 /* lets see if the required data source is really there */
757 for(ii=0;ii<(int)im->gdes[i].ds_cnt;ii++){
758 if(strcmp(im->gdes[i].ds_namv[ii],im->gdes[i].ds_nam) == 0){
761 if (im->gdes[i].ds== -1){
762 rrd_set_error("No DS called '%s' in '%s'",
763 im->gdes[i].ds_nam,im->gdes[i].rrd);
771 /* evaluate the expressions in the CDEF functions */
773 /*************************************************************
775 *************************************************************/
778 find_var_wrapper(void *arg1, char *key)
780 return find_var((image_desc_t *) arg1, key);
783 /* find gdes containing var*/
785 find_var(image_desc_t *im, char *key){
787 for(ii=0;ii<im->gdes_c-1;ii++){
788 if((im->gdes[ii].gf == GF_DEF
789 || im->gdes[ii].gf == GF_VDEF
790 || im->gdes[ii].gf == GF_CDEF)
791 && (strcmp(im->gdes[ii].vname,key) == 0)){
798 /* find the largest common denominator for all the numbers
799 in the 0 terminated num array */
804 for (i=0;num[i+1]!=0;i++){
806 rest=num[i] % num[i+1];
807 num[i]=num[i+1]; num[i+1]=rest;
811 /* return i==0?num[i]:num[i-1]; */
815 /* run the rpn calculator on all the VDEF and CDEF arguments */
817 data_calc( image_desc_t *im){
821 long *steparray, rpi;
826 rpnstack_init(&rpnstack);
828 for (gdi=0;gdi<im->gdes_c;gdi++){
829 /* Look for GF_VDEF and GF_CDEF in the same loop,
830 * so CDEFs can use VDEFs and vice versa
832 switch (im->gdes[gdi].gf) {
836 graph_desc_t *vdp = &im->gdes[im->gdes[gdi].vidx];
838 /* remove current shift */
839 vdp->start -= vdp->shift;
840 vdp->end -= vdp->shift;
843 if (im->gdes[gdi].shidx >= 0)
844 vdp->shift = im->gdes[im->gdes[gdi].shidx].vf.val;
847 vdp->shift = im->gdes[gdi].shval;
849 /* normalize shift to multiple of consolidated step */
850 vdp->shift = (vdp->shift / (long)vdp->step) * (long)vdp->step;
853 vdp->start += vdp->shift;
854 vdp->end += vdp->shift;
858 /* A VDEF has no DS. This also signals other parts
859 * of rrdtool that this is a VDEF value, not a CDEF.
861 im->gdes[gdi].ds_cnt = 0;
862 if (vdef_calc(im,gdi)) {
863 rrd_set_error("Error processing VDEF '%s'"
866 rpnstack_free(&rpnstack);
871 im->gdes[gdi].ds_cnt = 1;
872 im->gdes[gdi].ds = 0;
873 im->gdes[gdi].data_first = 1;
874 im->gdes[gdi].start = 0;
875 im->gdes[gdi].end = 0;
880 /* Find the variables in the expression.
881 * - VDEF variables are substituted by their values
882 * and the opcode is changed into OP_NUMBER.
883 * - CDEF variables are analized for their step size,
884 * the lowest common denominator of all the step
885 * sizes of the data sources involved is calculated
886 * and the resulting number is the step size for the
887 * resulting data source.
889 for(rpi=0;im->gdes[gdi].rpnp[rpi].op != OP_END;rpi++){
890 if(im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
891 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER){
892 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
893 if (im->gdes[ptr].ds_cnt == 0) { /* this is a VDEF data source */
895 printf("DEBUG: inside CDEF '%s' processing VDEF '%s'\n",
897 im->gdes[ptr].vname);
898 printf("DEBUG: value from vdef is %f\n",im->gdes[ptr].vf.val);
900 im->gdes[gdi].rpnp[rpi].val = im->gdes[ptr].vf.val;
901 im->gdes[gdi].rpnp[rpi].op = OP_NUMBER;
902 } else { /* normal variables and PREF(variables) */
904 /* add one entry to the array that keeps track of the step sizes of the
905 * data sources going into the CDEF. */
907 rrd_realloc(steparray,
908 (++stepcnt+1)*sizeof(*steparray)))==NULL){
909 rrd_set_error("realloc steparray");
910 rpnstack_free(&rpnstack);
914 steparray[stepcnt-1] = im->gdes[ptr].step;
916 /* adjust start and end of cdef (gdi) so
917 * that it runs from the latest start point
918 * to the earliest endpoint of any of the
919 * rras involved (ptr)
922 if(im->gdes[gdi].start < im->gdes[ptr].start)
923 im->gdes[gdi].start = im->gdes[ptr].start;
925 if(im->gdes[gdi].end == 0 ||
926 im->gdes[gdi].end > im->gdes[ptr].end)
927 im->gdes[gdi].end = im->gdes[ptr].end;
929 /* store pointer to the first element of
930 * the rra providing data for variable,
931 * further save step size and data source
934 im->gdes[gdi].rpnp[rpi].data = im->gdes[ptr].data + im->gdes[ptr].ds;
935 im->gdes[gdi].rpnp[rpi].step = im->gdes[ptr].step;
936 im->gdes[gdi].rpnp[rpi].ds_cnt = im->gdes[ptr].ds_cnt;
938 /* backoff the *.data ptr; this is done so
939 * rpncalc() function doesn't have to treat
940 * the first case differently
942 } /* if ds_cnt != 0 */
943 } /* if OP_VARIABLE */
944 } /* loop through all rpi */
946 /* move the data pointers to the correct period */
947 for(rpi=0;im->gdes[gdi].rpnp[rpi].op != OP_END;rpi++){
948 if(im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
949 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER){
950 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
951 long diff = im->gdes[gdi].start - im->gdes[ptr].start;
954 im->gdes[gdi].rpnp[rpi].data += (diff / im->gdes[ptr].step) * im->gdes[ptr].ds_cnt;
958 if(steparray == NULL){
959 rrd_set_error("rpn expressions without DEF"
960 " or CDEF variables are not supported");
961 rpnstack_free(&rpnstack);
964 steparray[stepcnt]=0;
965 /* Now find the resulting step. All steps in all
966 * used RRAs have to be visited
968 im->gdes[gdi].step = lcd(steparray);
970 if((im->gdes[gdi].data = malloc((
971 (im->gdes[gdi].end-im->gdes[gdi].start)
972 / im->gdes[gdi].step)
973 * sizeof(double)))==NULL){
974 rrd_set_error("malloc im->gdes[gdi].data");
975 rpnstack_free(&rpnstack);
979 /* Step through the new cdef results array and
980 * calculate the values
982 for (now = im->gdes[gdi].start + im->gdes[gdi].step;
983 now<=im->gdes[gdi].end;
984 now += im->gdes[gdi].step)
986 rpnp_t *rpnp = im -> gdes[gdi].rpnp;
988 /* 3rd arg of rpn_calc is for OP_VARIABLE lookups;
989 * in this case we are advancing by timesteps;
990 * we use the fact that time_t is a synonym for long
992 if (rpn_calc(rpnp,&rpnstack,(long) now,
993 im->gdes[gdi].data,++dataidx) == -1) {
994 /* rpn_calc sets the error string */
995 rpnstack_free(&rpnstack);
998 } /* enumerate over time steps within a CDEF */
1003 } /* enumerate over CDEFs */
1004 rpnstack_free(&rpnstack);
1008 /* massage data so, that we get one value for each x coordinate in the graph */
1010 data_proc( image_desc_t *im ){
1012 double pixstep = (double)(im->end-im->start)
1013 /(double)im->xsize; /* how much time
1014 passes in one pixel */
1016 double minval=DNAN,maxval=DNAN;
1018 unsigned long gr_time;
1020 /* memory for the processed data */
1021 for(i=0;i<im->gdes_c;i++) {
1022 if((im->gdes[i].gf==GF_LINE) ||
1023 (im->gdes[i].gf==GF_AREA) ||
1024 (im->gdes[i].gf==GF_TICK) ||
1025 (im->gdes[i].gf==GF_STACK)) {
1026 if((im->gdes[i].p_data = malloc((im->xsize +1)
1027 * sizeof(rrd_value_t)))==NULL){
1028 rrd_set_error("malloc data_proc");
1034 for (i=0;i<im->xsize;i++) { /* for each pixel */
1036 gr_time = im->start+pixstep*i; /* time of the current step */
1039 for (ii=0;ii<im->gdes_c;ii++) {
1041 switch (im->gdes[ii].gf) {
1045 if (!im->gdes[ii].stack)
1048 value = im->gdes[ii].yrule;
1049 if (isnan(value) || (im->gdes[ii].gf == GF_TICK)) {
1050 /* The time of the data doesn't necessarily match
1051 ** the time of the graph. Beware.
1053 vidx = im->gdes[ii].vidx;
1054 if (im->gdes[vidx].gf == GF_VDEF) {
1055 value = im->gdes[vidx].vf.val;
1056 } else if (((long int)gr_time >= (long int)im->gdes[vidx].start) &&
1057 ((long int)gr_time <= (long int)im->gdes[vidx].end) ) {
1058 value = im->gdes[vidx].data[
1059 (unsigned long) floor(
1060 (double)(gr_time - im->gdes[vidx].start)
1061 / im->gdes[vidx].step)
1062 * im->gdes[vidx].ds_cnt
1070 if (! isnan(value)) {
1072 im->gdes[ii].p_data[i] = paintval;
1073 /* GF_TICK: the data values are not
1074 ** relevant for min and max
1076 if (finite(paintval) && im->gdes[ii].gf != GF_TICK ) {
1077 if (isnan(minval) || paintval < minval)
1079 if (isnan(maxval) || paintval > maxval)
1083 im->gdes[ii].p_data[i] = DNAN;
1092 /* if min or max have not been asigned a value this is because
1093 there was no data in the graph ... this is not good ...
1094 lets set these to dummy values then ... */
1096 if (isnan(minval)) minval = 0.0;
1097 if (isnan(maxval)) maxval = 1.0;
1099 /* adjust min and max values */
1100 if (isnan(im->minval)
1101 /* don't adjust low-end with log scale */
1102 || ((!im->logarithmic && !im->rigid) && im->minval > minval)
1104 im->minval = minval;
1105 if (isnan(im->maxval)
1106 || (!im->rigid && im->maxval < maxval)
1108 if (im->logarithmic)
1109 im->maxval = maxval * 1.1;
1111 im->maxval = maxval;
1113 /* make sure min is smaller than max */
1114 if (im->minval > im->maxval) {
1115 im->minval = 0.99 * im->maxval;
1118 /* make sure min and max are not equal */
1119 if (im->minval == im->maxval) {
1121 if (! im->logarithmic) {
1124 /* make sure min and max are not both zero */
1125 if (im->maxval == 0.0) {
1134 /* identify the point where the first gridline, label ... gets placed */
1138 time_t start, /* what is the initial time */
1139 enum tmt_en baseint, /* what is the basic interval */
1140 long basestep /* how many if these do we jump a time */
1144 localtime_r(&start, &tm);
1147 tm.tm_sec -= tm.tm_sec % basestep; break;
1150 tm.tm_min -= tm.tm_min % basestep;
1155 tm.tm_hour -= tm.tm_hour % basestep; break;
1157 /* we do NOT look at the basestep for this ... */
1160 tm.tm_hour = 0; break;
1162 /* we do NOT look at the basestep for this ... */
1166 tm.tm_mday -= tm.tm_wday -1; /* -1 because we want the monday */
1167 if (tm.tm_wday==0) tm.tm_mday -= 7; /* we want the *previous* monday */
1174 tm.tm_mon -= tm.tm_mon % basestep; break;
1182 tm.tm_year -= (tm.tm_year+1900) % basestep;
1187 /* identify the point where the next gridline, label ... gets placed */
1190 time_t current, /* what is the initial time */
1191 enum tmt_en baseint, /* what is the basic interval */
1192 long basestep /* how many if these do we jump a time */
1197 localtime_r(¤t, &tm);
1201 tm.tm_sec += basestep; break;
1203 tm.tm_min += basestep; break;
1205 tm.tm_hour += basestep; break;
1207 tm.tm_mday += basestep; break;
1209 tm.tm_mday += 7*basestep; break;
1211 tm.tm_mon += basestep; break;
1213 tm.tm_year += basestep;
1215 madetime = mktime(&tm);
1216 } while (madetime == -1); /* this is necessary to skip impssible times
1217 like the daylight saving time skips */
1223 /* calculate values required for PRINT and GPRINT functions */
1226 print_calc(image_desc_t *im, char ***prdata)
1228 long i,ii,validsteps;
1231 int graphelement = 0;
1234 double magfact = -1;
1238 if (im->imginfo) prlines++;
1239 for(i=0;i<im->gdes_c;i++){
1240 switch(im->gdes[i].gf){
1243 if(((*prdata) = rrd_realloc((*prdata),prlines*sizeof(char *)))==NULL){
1244 rrd_set_error("realloc prdata");
1248 /* PRINT and GPRINT can now print VDEF generated values.
1249 * There's no need to do any calculations on them as these
1250 * calculations were already made.
1252 vidx = im->gdes[i].vidx;
1253 if (im->gdes[vidx].gf==GF_VDEF) { /* simply use vals */
1254 printval = im->gdes[vidx].vf.val;
1255 printtime = im->gdes[vidx].vf.when;
1256 } else { /* need to calculate max,min,avg etcetera */
1257 max_ii =((im->gdes[vidx].end
1258 - im->gdes[vidx].start)
1259 / im->gdes[vidx].step
1260 * im->gdes[vidx].ds_cnt);
1263 for( ii=im->gdes[vidx].ds;
1265 ii+=im->gdes[vidx].ds_cnt){
1266 if (! finite(im->gdes[vidx].data[ii]))
1268 if (isnan(printval)){
1269 printval = im->gdes[vidx].data[ii];
1274 switch (im->gdes[i].cf){
1277 case CF_DEVSEASONAL:
1281 printval += im->gdes[vidx].data[ii];
1284 printval = min( printval, im->gdes[vidx].data[ii]);
1288 printval = max( printval, im->gdes[vidx].data[ii]);
1291 printval = im->gdes[vidx].data[ii];
1294 if (im->gdes[i].cf==CF_AVERAGE || im->gdes[i].cf > CF_LAST) {
1295 if (validsteps > 1) {
1296 printval = (printval / validsteps);
1299 } /* prepare printval */
1301 if (!strcmp(im->gdes[i].format,"%c")) { /* VDEF time print */
1302 char ctime_buf[128]; /* PS: for ctime_r, must be >= 26 chars */
1304 ctime_r(&printtime,ctime_buf);
1305 while(isprint(ctime_buf[iii])){iii++;}
1306 ctime_buf[iii]='\0';
1307 if (im->gdes[i].gf == GF_PRINT){
1308 (*prdata)[prlines-2] = malloc((FMT_LEG_LEN+2)*sizeof(char));
1309 sprintf((*prdata)[prlines-2],"%s (%lu)",ctime_buf,printtime);
1310 (*prdata)[prlines-1] = NULL;
1312 sprintf(im->gdes[i].legend,"%s (%lu)",ctime_buf,printtime);
1316 if ((percent_s = strstr(im->gdes[i].format,"%S")) != NULL) {
1317 /* Magfact is set to -1 upon entry to print_calc. If it
1318 * is still less than 0, then we need to run auto_scale.
1319 * Otherwise, put the value into the correct units. If
1320 * the value is 0, then do not set the symbol or magnification
1321 * so next the calculation will be performed again. */
1322 if (magfact < 0.0) {
1323 auto_scale(im,&printval,&si_symb,&magfact);
1324 if (printval == 0.0)
1327 printval /= magfact;
1329 *(++percent_s) = 's';
1330 } else if (strstr(im->gdes[i].format,"%s") != NULL) {
1331 auto_scale(im,&printval,&si_symb,&magfact);
1334 if (im->gdes[i].gf == GF_PRINT){
1335 (*prdata)[prlines-2] = malloc((FMT_LEG_LEN+2)*sizeof(char));
1336 (*prdata)[prlines-1] = NULL;
1337 if (bad_format(im->gdes[i].format)) {
1338 rrd_set_error("bad format for PRINT in '%s'", im->gdes[i].format);
1341 #ifdef HAVE_SNPRINTF
1342 snprintf((*prdata)[prlines-2],FMT_LEG_LEN,im->gdes[i].format,printval,si_symb);
1344 sprintf((*prdata)[prlines-2],im->gdes[i].format,printval,si_symb);
1349 if (bad_format(im->gdes[i].format)) {
1350 rrd_set_error("bad format for GPRINT in '%s'", im->gdes[i].format);
1353 #ifdef HAVE_SNPRINTF
1354 snprintf(im->gdes[i].legend,FMT_LEG_LEN-2,im->gdes[i].format,printval,si_symb);
1356 sprintf(im->gdes[i].legend,im->gdes[i].format,printval,si_symb);
1374 #ifdef WITH_PIECHART
1382 return graphelement;
1386 /* place legends with color spots */
1388 leg_place(image_desc_t *im)
1391 int interleg = im->text_prop[TEXT_PROP_LEGEND].size*2.0;
1392 int border = im->text_prop[TEXT_PROP_LEGEND].size*2.0;
1393 int fill=0, fill_last;
1395 int leg_x = border, leg_y = im->yimg;
1399 char prt_fctn; /*special printfunctions */
1402 if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
1403 if ((legspace = malloc(im->gdes_c*sizeof(int)))==NULL){
1404 rrd_set_error("malloc for legspace");
1408 for(i=0;i<im->gdes_c;i++){
1411 /* hid legends for rules which are not displayed */
1413 if(!(im->extra_flags & FORCE_RULES_LEGEND)) {
1414 if (im->gdes[i].gf == GF_HRULE &&
1415 (im->gdes[i].yrule < im->minval || im->gdes[i].yrule > im->maxval))
1416 im->gdes[i].legend[0] = '\0';
1418 if (im->gdes[i].gf == GF_VRULE &&
1419 (im->gdes[i].xrule < im->start || im->gdes[i].xrule > im->end))
1420 im->gdes[i].legend[0] = '\0';
1423 leg_cc = strlen(im->gdes[i].legend);
1425 /* is there a controle code ant the end of the legend string ? */
1426 /* and it is not a tab \\t */
1427 if (leg_cc >= 2 && im->gdes[i].legend[leg_cc-2] == '\\' && im->gdes[i].legend[leg_cc-1] != 't') {
1428 prt_fctn = im->gdes[i].legend[leg_cc-1];
1430 im->gdes[i].legend[leg_cc] = '\0';
1434 /* remove exess space */
1435 while (prt_fctn=='g' &&
1437 im->gdes[i].legend[leg_cc-1]==' '){
1439 im->gdes[i].legend[leg_cc]='\0';
1442 legspace[i]=(prt_fctn=='g' ? 0 : interleg);
1445 /* no interleg space if string ends in \g */
1446 fill += legspace[i];
1448 fill += gfx_get_text_width(im->canvas, fill+border,
1449 im->text_prop[TEXT_PROP_LEGEND].font,
1450 im->text_prop[TEXT_PROP_LEGEND].size,
1452 im->gdes[i].legend, 0);
1457 /* who said there was a special tag ... ?*/
1458 if (prt_fctn=='g') {
1461 if (prt_fctn == '\0') {
1462 if (i == im->gdes_c -1 ) prt_fctn ='l';
1464 /* is it time to place the legends ? */
1465 if (fill > im->ximg - 2*border){
1480 if (prt_fctn != '\0'){
1482 if (leg_c >= 2 && prt_fctn == 'j') {
1483 glue = (im->ximg - fill - 2* border) / (leg_c-1);
1487 if (prt_fctn =='c') leg_x = (im->ximg - fill) / 2.0;
1488 if (prt_fctn =='r') leg_x = im->ximg - fill - border;
1490 for(ii=mark;ii<=i;ii++){
1491 if(im->gdes[ii].legend[0]=='\0')
1492 continue; /* skip empty legends */
1493 im->gdes[ii].leg_x = leg_x;
1494 im->gdes[ii].leg_y = leg_y;
1496 gfx_get_text_width(im->canvas, leg_x,
1497 im->text_prop[TEXT_PROP_LEGEND].font,
1498 im->text_prop[TEXT_PROP_LEGEND].size,
1500 im->gdes[ii].legend, 0)
1504 leg_y += im->text_prop[TEXT_PROP_LEGEND].size*1.8;
1505 if (prt_fctn == 's') leg_y -= im->text_prop[TEXT_PROP_LEGEND].size;
1517 /* create a grid on the graph. it determines what to do
1518 from the values of xsize, start and end */
1520 /* the xaxis labels are determined from the number of seconds per pixel
1521 in the requested graph */
1526 calc_horizontal_grid(image_desc_t *im)
1532 int decimals, fractionals;
1534 im->ygrid_scale.labfact=2;
1536 range = im->maxval - im->minval;
1537 scaledrange = range / im->magfact;
1539 /* does the scale of this graph make it impossible to put lines
1540 on it? If so, give up. */
1541 if (isnan(scaledrange)) {
1545 /* find grid spaceing */
1547 if(isnan(im->ygridstep)){
1548 if(im->extra_flags & ALTYGRID) {
1549 /* find the value with max number of digits. Get number of digits */
1550 decimals = ceil(log10(max(fabs(im->maxval), fabs(im->minval))));
1551 if(decimals <= 0) /* everything is small. make place for zero */
1554 fractionals = floor(log10(range));
1555 if(fractionals < 0) { /* small amplitude. */
1556 int len = decimals - fractionals + 1;
1557 if (im->unitslength < len) im->unitslength = len;
1558 sprintf(im->ygrid_scale.labfmt, "%%%d.%df", len, -fractionals + 1);
1560 int len = decimals + 1;
1561 if (im->unitslength < len) im->unitslength = len;
1562 sprintf(im->ygrid_scale.labfmt, "%%%d.1f", len);
1564 im->ygrid_scale.gridstep = pow((double)10, (double)fractionals);
1565 if(im->ygrid_scale.gridstep == 0) /* range is one -> 0.1 is reasonable scale */
1566 im->ygrid_scale.gridstep = 0.1;
1567 /* should have at least 5 lines but no more then 15 */
1568 if(range/im->ygrid_scale.gridstep < 5)
1569 im->ygrid_scale.gridstep /= 10;
1570 if(range/im->ygrid_scale.gridstep > 15)
1571 im->ygrid_scale.gridstep *= 10;
1572 if(range/im->ygrid_scale.gridstep > 5) {
1573 im->ygrid_scale.labfact = 1;
1574 if(range/im->ygrid_scale.gridstep > 8)
1575 im->ygrid_scale.labfact = 2;
1578 im->ygrid_scale.gridstep /= 5;
1579 im->ygrid_scale.labfact = 5;
1583 for(i=0;ylab[i].grid > 0;i++){
1584 pixel = im->ysize / (scaledrange / ylab[i].grid);
1592 if (pixel * ylab[gridind].lfac[i] >= 2.5 * im->text_prop[TEXT_PROP_AXIS].size) {
1593 im->ygrid_scale.labfact = ylab[gridind].lfac[i];
1598 im->ygrid_scale.gridstep = ylab[gridind].grid * im->magfact;
1601 im->ygrid_scale.gridstep = im->ygridstep;
1602 im->ygrid_scale.labfact = im->ylabfact;
1607 int draw_horizontal_grid(image_desc_t *im)
1611 char graph_label[100];
1612 double X0=im->xorigin;
1613 double X1=im->xorigin+im->xsize;
1615 int sgrid = (int)( im->minval / im->ygrid_scale.gridstep - 1);
1616 int egrid = (int)( im->maxval / im->ygrid_scale.gridstep + 1);
1617 scaledstep = im->ygrid_scale.gridstep/im->magfact;
1618 for (i = sgrid; i <= egrid; i++){
1619 double Y0=ytr(im,im->ygrid_scale.gridstep*i);
1620 if ( Y0 >= im->yorigin-im->ysize
1621 && Y0 <= im->yorigin){
1622 if(i % im->ygrid_scale.labfact == 0){
1623 if (i==0 || im->symbol == ' ') {
1625 if(im->extra_flags & ALTYGRID) {
1626 sprintf(graph_label,im->ygrid_scale.labfmt,scaledstep*im->viewfactor*i);
1629 sprintf(graph_label,"%4.1f",scaledstep*im->viewfactor*i);
1632 sprintf(graph_label,"%4.0f",scaledstep*im->viewfactor*i);
1636 sprintf(graph_label,"%4.1f %c",scaledstep*im->viewfactor*i, im->symbol);
1638 sprintf(graph_label,"%4.0f %c",scaledstep*im->viewfactor*i, im->symbol);
1642 gfx_new_text ( im->canvas,
1643 X0-im->text_prop[TEXT_PROP_AXIS].size, Y0,
1644 im->graph_col[GRC_FONT],
1645 im->text_prop[TEXT_PROP_AXIS].font,
1646 im->text_prop[TEXT_PROP_AXIS].size,
1647 im->tabwidth, 0.0, GFX_H_RIGHT, GFX_V_CENTER,
1649 gfx_new_dashed_line ( im->canvas,
1652 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1653 im->grid_dash_on, im->grid_dash_off);
1655 } else if (!(im->extra_flags & NOMINOR)) {
1656 gfx_new_dashed_line ( im->canvas,
1659 GRIDWIDTH, im->graph_col[GRC_GRID],
1660 im->grid_dash_on, im->grid_dash_off);
1668 /* logaritmic horizontal grid */
1670 horizontal_log_grid(image_desc_t *im)
1674 int minoridx=0, majoridx=0;
1675 char graph_label[100];
1677 double value, pixperstep, minstep;
1679 /* find grid spaceing */
1680 pixpex= (double)im->ysize / (log10(im->maxval) - log10(im->minval));
1682 if (isnan(pixpex)) {
1686 for(i=0;yloglab[i][0] > 0;i++){
1687 minstep = log10(yloglab[i][0]);
1688 for(ii=1;yloglab[i][ii+1] > 0;ii++){
1689 if(yloglab[i][ii+2]==0){
1690 minstep = log10(yloglab[i][ii+1])-log10(yloglab[i][ii]);
1694 pixperstep = pixpex * minstep;
1695 if(pixperstep > 5){minoridx = i;}
1696 if(pixperstep > 2 * im->text_prop[TEXT_PROP_LEGEND].size){majoridx = i;}
1700 X1=im->xorigin+im->xsize;
1701 /* paint minor grid */
1702 for (value = pow((double)10, log10(im->minval)
1703 - fmod(log10(im->minval),log10(yloglab[minoridx][0])));
1704 value <= im->maxval;
1705 value *= yloglab[minoridx][0]){
1706 if (value < im->minval) continue;
1708 while(yloglab[minoridx][++i] > 0){
1709 Y0 = ytr(im,value * yloglab[minoridx][i]);
1710 if (Y0 <= im->yorigin - im->ysize) break;
1711 gfx_new_dashed_line ( im->canvas,
1714 GRIDWIDTH, im->graph_col[GRC_GRID],
1715 im->grid_dash_on, im->grid_dash_off);
1719 /* paint major grid and labels*/
1720 for (value = pow((double)10, log10(im->minval)
1721 - fmod(log10(im->minval),log10(yloglab[majoridx][0])));
1722 value <= im->maxval;
1723 value *= yloglab[majoridx][0]){
1724 if (value < im->minval) continue;
1726 while(yloglab[majoridx][++i] > 0){
1727 Y0 = ytr(im,value * yloglab[majoridx][i]);
1728 if (Y0 <= im->yorigin - im->ysize) break;
1729 gfx_new_dashed_line ( im->canvas,
1732 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1733 im->grid_dash_on, im->grid_dash_off);
1735 sprintf(graph_label,"%3.0e",value * yloglab[majoridx][i]);
1736 gfx_new_text ( im->canvas,
1737 X0-im->text_prop[TEXT_PROP_AXIS].size, Y0,
1738 im->graph_col[GRC_FONT],
1739 im->text_prop[TEXT_PROP_AXIS].font,
1740 im->text_prop[TEXT_PROP_AXIS].size,
1741 im->tabwidth,0.0, GFX_H_RIGHT, GFX_V_CENTER,
1753 int xlab_sel; /* which sort of label and grid ? */
1754 time_t ti, tilab, timajor;
1756 char graph_label[100];
1757 double X0,Y0,Y1; /* points for filled graph and more*/
1760 /* the type of time grid is determined by finding
1761 the number of seconds per pixel in the graph */
1764 if(im->xlab_user.minsec == -1){
1765 factor=(im->end - im->start)/im->xsize;
1767 while ( xlab[xlab_sel+1].minsec != -1
1768 && xlab[xlab_sel+1].minsec <= factor){ xlab_sel++; }
1769 im->xlab_user.gridtm = xlab[xlab_sel].gridtm;
1770 im->xlab_user.gridst = xlab[xlab_sel].gridst;
1771 im->xlab_user.mgridtm = xlab[xlab_sel].mgridtm;
1772 im->xlab_user.mgridst = xlab[xlab_sel].mgridst;
1773 im->xlab_user.labtm = xlab[xlab_sel].labtm;
1774 im->xlab_user.labst = xlab[xlab_sel].labst;
1775 im->xlab_user.precis = xlab[xlab_sel].precis;
1776 im->xlab_user.stst = xlab[xlab_sel].stst;
1779 /* y coords are the same for every line ... */
1781 Y1 = im->yorigin-im->ysize;
1784 /* paint the minor grid */
1785 if (!(im->extra_flags & NOMINOR))
1787 for(ti = find_first_time(im->start,
1788 im->xlab_user.gridtm,
1789 im->xlab_user.gridst),
1790 timajor = find_first_time(im->start,
1791 im->xlab_user.mgridtm,
1792 im->xlab_user.mgridst);
1794 ti = find_next_time(ti,im->xlab_user.gridtm,im->xlab_user.gridst)
1796 /* are we inside the graph ? */
1797 if (ti < im->start || ti > im->end) continue;
1798 while (timajor < ti) {
1799 timajor = find_next_time(timajor,
1800 im->xlab_user.mgridtm, im->xlab_user.mgridst);
1802 if (ti == timajor) continue; /* skip as falls on major grid line */
1804 gfx_new_dashed_line(im->canvas,X0,Y0+1, X0,Y1-1,GRIDWIDTH,
1805 im->graph_col[GRC_GRID],
1806 im->grid_dash_on, im->grid_dash_off);
1811 /* paint the major grid */
1812 for(ti = find_first_time(im->start,
1813 im->xlab_user.mgridtm,
1814 im->xlab_user.mgridst);
1816 ti = find_next_time(ti,im->xlab_user.mgridtm,im->xlab_user.mgridst)
1818 /* are we inside the graph ? */
1819 if (ti < im->start || ti > im->end) continue;
1821 gfx_new_dashed_line(im->canvas,X0,Y0+3, X0,Y1-2,MGRIDWIDTH,
1822 im->graph_col[GRC_MGRID],
1823 im->grid_dash_on, im->grid_dash_off);
1826 /* paint the labels below the graph */
1827 for(ti = find_first_time(im->start - im->xlab_user.precis/2,
1828 im->xlab_user.labtm,
1829 im->xlab_user.labst);
1830 ti <= im->end - im->xlab_user.precis/2;
1831 ti = find_next_time(ti,im->xlab_user.labtm,im->xlab_user.labst)
1833 tilab= ti + im->xlab_user.precis/2; /* correct time for the label */
1834 /* are we inside the graph ? */
1835 if (tilab < im->start || tilab > im->end) continue;
1838 localtime_r(&tilab, &tm);
1839 strftime(graph_label,99,im->xlab_user.stst, &tm);
1841 # error "your libc has no strftime I guess we'll abort the exercise here."
1843 gfx_new_text ( im->canvas,
1844 xtr(im,tilab), Y0+im->text_prop[TEXT_PROP_AXIS].size,
1845 im->graph_col[GRC_FONT],
1846 im->text_prop[TEXT_PROP_AXIS].font,
1847 im->text_prop[TEXT_PROP_AXIS].size,
1848 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_TOP,
1861 /* draw x and y axis */
1862 /* gfx_new_line ( im->canvas, im->xorigin+im->xsize,im->yorigin,
1863 im->xorigin+im->xsize,im->yorigin-im->ysize,
1864 GRIDWIDTH, im->graph_col[GRC_AXIS]);
1866 gfx_new_line ( im->canvas, im->xorigin,im->yorigin-im->ysize,
1867 im->xorigin+im->xsize,im->yorigin-im->ysize,
1868 GRIDWIDTH, im->graph_col[GRC_AXIS]); */
1870 gfx_new_line ( im->canvas, im->xorigin-4,im->yorigin,
1871 im->xorigin+im->xsize+4,im->yorigin,
1872 MGRIDWIDTH, im->graph_col[GRC_AXIS]);
1874 gfx_new_line ( im->canvas, im->xorigin,im->yorigin+4,
1875 im->xorigin,im->yorigin-im->ysize-4,
1876 MGRIDWIDTH, im->graph_col[GRC_AXIS]);
1879 /* arrow for X and Y axis direction */
1880 gfx_new_area ( im->canvas,
1881 im->xorigin+im->xsize+2, im->yorigin-2,
1882 im->xorigin+im->xsize+2, im->yorigin+3,
1883 im->xorigin+im->xsize+7, im->yorigin+0.5, /* LINEOFFSET */
1884 im->graph_col[GRC_ARROW]);
1886 gfx_new_area ( im->canvas,
1887 im->xorigin-2, im->yorigin-im->ysize-2,
1888 im->xorigin+3, im->yorigin-im->ysize-2,
1889 im->xorigin+0.5, im->yorigin-im->ysize-7, /* LINEOFFSET */
1890 im->graph_col[GRC_ARROW]);
1895 grid_paint(image_desc_t *im)
1899 double X0,Y0; /* points for filled graph and more*/
1902 /* draw 3d border */
1903 node = gfx_new_area (im->canvas, 0,im->yimg,
1905 2,2,im->graph_col[GRC_SHADEA]);
1906 gfx_add_point( node , im->ximg - 2, 2 );
1907 gfx_add_point( node , im->ximg, 0 );
1908 gfx_add_point( node , 0,0 );
1909 /* gfx_add_point( node , 0,im->yimg ); */
1911 node = gfx_new_area (im->canvas, 2,im->yimg-2,
1912 im->ximg-2,im->yimg-2,
1914 im->graph_col[GRC_SHADEB]);
1915 gfx_add_point( node , im->ximg,0);
1916 gfx_add_point( node , im->ximg,im->yimg);
1917 gfx_add_point( node , 0,im->yimg);
1918 /* gfx_add_point( node , 0,im->yimg ); */
1921 if (im->draw_x_grid == 1 )
1924 if (im->draw_y_grid == 1){
1925 if(im->logarithmic){
1926 res = horizontal_log_grid(im);
1928 res = draw_horizontal_grid(im);
1931 /* dont draw horizontal grid if there is no min and max val */
1933 char *nodata = "No Data found";
1934 gfx_new_text(im->canvas,im->ximg/2, (2*im->yorigin-im->ysize) / 2,
1935 im->graph_col[GRC_FONT],
1936 im->text_prop[TEXT_PROP_AXIS].font,
1937 im->text_prop[TEXT_PROP_AXIS].size,
1938 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_CENTER,
1943 /* yaxis unit description */
1944 gfx_new_text( im->canvas,
1945 10, (im->yorigin - im->ysize/2),
1946 im->graph_col[GRC_FONT],
1947 im->text_prop[TEXT_PROP_UNIT].font,
1948 im->text_prop[TEXT_PROP_UNIT].size, im->tabwidth,
1949 RRDGRAPH_YLEGEND_ANGLE,
1950 GFX_H_LEFT, GFX_V_CENTER,
1954 gfx_new_text( im->canvas,
1955 im->ximg/2, im->text_prop[TEXT_PROP_TITLE].size*1.3+4,
1956 im->graph_col[GRC_FONT],
1957 im->text_prop[TEXT_PROP_TITLE].font,
1958 im->text_prop[TEXT_PROP_TITLE].size, im->tabwidth, 0.0,
1959 GFX_H_CENTER, GFX_V_CENTER,
1961 /* rrdtool 'logo' */
1962 gfx_new_text( im->canvas,
1964 ( im->graph_col[GRC_FONT] & 0xffffff00 ) | 0x00000044,
1965 im->text_prop[TEXT_PROP_AXIS].font,
1966 5.5, im->tabwidth, 270,
1967 GFX_H_RIGHT, GFX_V_TOP,
1968 "RRDTOOL / TOBI OETIKER");
1971 if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
1972 for(i=0;i<im->gdes_c;i++){
1973 if(im->gdes[i].legend[0] =='\0')
1976 /* im->gdes[i].leg_y is the bottom of the legend */
1977 X0 = im->gdes[i].leg_x;
1978 Y0 = im->gdes[i].leg_y;
1979 gfx_new_text ( im->canvas, X0, Y0,
1980 im->graph_col[GRC_FONT],
1981 im->text_prop[TEXT_PROP_LEGEND].font,
1982 im->text_prop[TEXT_PROP_LEGEND].size,
1983 im->tabwidth,0.0, GFX_H_LEFT, GFX_V_BOTTOM,
1984 im->gdes[i].legend );
1985 /* The legend for GRAPH items starts with "M " to have
1986 enough space for the box */
1987 if ( im->gdes[i].gf != GF_PRINT &&
1988 im->gdes[i].gf != GF_GPRINT &&
1989 im->gdes[i].gf != GF_COMMENT) {
1990 int boxL, boxH, boxV;
1992 boxL = gfx_get_text_width(im->canvas, 0,
1993 im->text_prop[TEXT_PROP_LEGEND].font,
1994 im->text_prop[TEXT_PROP_LEGEND].size,
1995 im->tabwidth,"oo", 0);
1999 /* make sure transparent colors show up all the same */
2000 node = gfx_new_area(im->canvas,
2004 im->graph_col[GRC_BACK]);
2005 gfx_add_point ( node, X0+boxL+0.5, Y0-boxV );
2006 node = gfx_new_area(im->canvas,
2010 im->graph_col[GRC_CANVAS]);
2011 gfx_add_point ( node, X0+boxH, Y0-boxV );
2013 node = gfx_new_area(im->canvas,
2018 gfx_add_point ( node, X0+boxH, Y0-boxV );
2019 node = gfx_new_line(im->canvas,
2022 1,im->graph_col[GRC_FONT]);
2023 gfx_add_point(node,X0+boxH,Y0);
2024 gfx_add_point(node,X0+boxH,Y0-boxV);
2025 gfx_close_path(node);
2032 /*****************************************************
2033 * lazy check make sure we rely need to create this graph
2034 *****************************************************/
2036 int lazy_check(image_desc_t *im){
2039 struct stat imgstat;
2041 if (im->lazy == 0) return 0; /* no lazy option */
2042 if (stat(im->graphfile,&imgstat) != 0)
2043 return 0; /* can't stat */
2044 /* one pixel in the existing graph is more then what we would
2046 if (time(NULL) - imgstat.st_mtime >
2047 (im->end - im->start) / im->xsize)
2049 if ((fd = fopen(im->graphfile,"rb")) == NULL)
2050 return 0; /* the file does not exist */
2051 switch (im->canvas->imgformat) {
2053 size = PngSize(fd,&(im->ximg),&(im->yimg));
2062 #ifdef WITH_PIECHART
2064 pie_part(image_desc_t *im, gfx_color_t color,
2065 double PieCenterX, double PieCenterY, double Radius,
2066 double startangle, double endangle)
2070 double step=M_PI/50; /* Number of iterations for the circle;
2071 ** 10 is definitely too low, more than
2072 ** 50 seems to be overkill
2075 /* Strange but true: we have to work clockwise or else
2076 ** anti aliasing nor transparency don't work.
2078 ** This test is here to make sure we do it right, also
2079 ** this makes the for...next loop more easy to implement.
2080 ** The return will occur if the user enters a negative number
2081 ** (which shouldn't be done according to the specs) or if the
2082 ** programmers do something wrong (which, as we all know, never
2083 ** happens anyway :)
2085 if (endangle<startangle) return;
2087 /* Hidden feature: Radius decreases each full circle */
2089 while (angle>=2*M_PI) {
2094 node=gfx_new_area(im->canvas,
2095 PieCenterX+sin(startangle)*Radius,
2096 PieCenterY-cos(startangle)*Radius,
2099 PieCenterX+sin(endangle)*Radius,
2100 PieCenterY-cos(endangle)*Radius,
2102 for (angle=endangle;angle-startangle>=step;angle-=step) {
2104 PieCenterX+sin(angle)*Radius,
2105 PieCenterY-cos(angle)*Radius );
2112 graph_size_location(image_desc_t *im, int elements
2114 #ifdef WITH_PIECHART
2120 /* The actual size of the image to draw is determined from
2121 ** several sources. The size given on the command line is
2122 ** the graph area but we need more as we have to draw labels
2123 ** and other things outside the graph area
2126 /* +-+-------------------------------------------+
2127 ** |l|.................title.....................|
2128 ** |e+--+-------------------------------+--------+
2131 ** |l| l| main graph area | chart |
2134 ** |r+--+-------------------------------+--------+
2135 ** |e| | x-axis labels | |
2136 ** |v+--+-------------------------------+--------+
2137 ** | |..............legends......................|
2138 ** +-+-------------------------------------------+
2144 #ifdef WITH_PIECHART
2149 Xlegend =0, Ylegend =0,
2151 Xspacing =15, Yspacing =15;
2153 if (im->extra_flags & ONLY_GRAPH) {
2155 im->ximg = im->xsize;
2156 im->yimg = im->ysize;
2157 im->yorigin = im->ysize;
2161 if (im->ylegend[0] != '\0' ) {
2162 Xvertical = im->text_prop[TEXT_PROP_UNIT].size *2;
2166 if (im->title[0] != '\0') {
2167 /* The title is placed "inbetween" two text lines so it
2168 ** automatically has some vertical spacing. The horizontal
2169 ** spacing is added here, on each side.
2171 /* don't care for the with of the title
2172 Xtitle = gfx_get_text_width(im->canvas, 0,
2173 im->text_prop[TEXT_PROP_TITLE].font,
2174 im->text_prop[TEXT_PROP_TITLE].size,
2176 im->title, 0) + 2*Xspacing; */
2177 Ytitle = im->text_prop[TEXT_PROP_TITLE].size*2.6+10;
2183 if (im->draw_x_grid) {
2184 Yxlabel=im->text_prop[TEXT_PROP_AXIS].size *2.5;
2186 if (im->draw_y_grid) {
2187 Xylabel=gfx_get_text_width(im->canvas, 0,
2188 im->text_prop[TEXT_PROP_AXIS].font,
2189 im->text_prop[TEXT_PROP_AXIS].size,
2191 "0", 0) * im->unitslength;
2195 #ifdef WITH_PIECHART
2197 im->piesize=im->xsize<im->ysize?im->xsize:im->ysize;
2203 /* Now calculate the total size. Insert some spacing where
2204 desired. im->xorigin and im->yorigin need to correspond
2205 with the lower left corner of the main graph area or, if
2206 this one is not set, the imaginary box surrounding the
2209 /* The legend width cannot yet be determined, as a result we
2210 ** have problems adjusting the image to it. For now, we just
2211 ** forget about it at all; the legend will have to fit in the
2212 ** size already allocated.
2214 im->ximg = Xylabel + Xmain + 2 * Xspacing;
2216 #ifdef WITH_PIECHART
2220 if (Xmain) im->ximg += Xspacing;
2221 #ifdef WITH_PIECHART
2222 if (Xpie) im->ximg += Xspacing;
2225 im->xorigin = Xspacing + Xylabel;
2227 /* the length of the title should not influence with width of the graph
2228 if (Xtitle > im->ximg) im->ximg = Xtitle; */
2230 if (Xvertical) { /* unit description */
2231 im->ximg += Xvertical;
2232 im->xorigin += Xvertical;
2236 /* The vertical size is interesting... we need to compare
2237 ** the sum of {Ytitle, Ymain, Yxlabel, Ylegend} with Yvertical
2238 ** however we need to know {Ytitle+Ymain+Yxlabel} in order to
2239 ** start even thinking about Ylegend.
2241 ** Do it in three portions: First calculate the inner part,
2242 ** then do the legend, then adjust the total height of the img.
2245 /* reserve space for main and/or pie */
2247 im->yimg = Ymain + Yxlabel;
2249 #ifdef WITH_PIECHART
2250 if (im->yimg < Ypie) im->yimg = Ypie;
2253 im->yorigin = im->yimg - Yxlabel;
2255 /* reserve space for the title *or* some padding above the graph */
2258 im->yorigin += Ytitle;
2260 im->yimg += 1.5*Yspacing;
2261 im->yorigin += 1.5*Yspacing;
2263 /* reserve space for padding below the graph */
2264 im->yimg += Yspacing;
2267 /* Determine where to place the legends onto the image.
2268 ** Adjust im->yimg to match the space requirements.
2270 if(leg_place(im)==-1)
2275 if (Xlegend > im->ximg) {
2277 /* reposition Pie */
2281 #ifdef WITH_PIECHART
2282 /* The pie is placed in the upper right hand corner,
2283 ** just below the title (if any) and with sufficient
2287 im->pie_x = im->ximg - Xspacing - Xpie/2;
2288 im->pie_y = im->yorigin-Ymain+Ypie/2;
2290 im->pie_x = im->ximg/2;
2291 im->pie_y = im->yorigin-Ypie/2;
2298 /* draw that picture thing ... */
2300 graph_paint(image_desc_t *im, char ***calcpr)
2303 int lazy = lazy_check(im);
2304 #ifdef WITH_PIECHART
2306 double PieStart=0.0;
2311 double areazero = 0.0;
2312 enum gf_en stack_gf = GF_PRINT;
2313 graph_desc_t *lastgdes = NULL;
2315 /* if we are lazy and there is nothing to PRINT ... quit now */
2316 if (lazy && im->prt_c==0) return 0;
2318 /* pull the data from the rrd files ... */
2320 if(data_fetch(im)==-1)
2323 /* evaluate VDEF and CDEF operations ... */
2324 if(data_calc(im)==-1)
2327 #ifdef WITH_PIECHART
2328 /* check if we need to draw a piechart */
2329 for(i=0;i<im->gdes_c;i++){
2330 if (im->gdes[i].gf == GF_PART) {
2337 /* calculate and PRINT and GPRINT definitions. We have to do it at
2338 * this point because it will affect the length of the legends
2339 * if there are no graph elements we stop here ...
2340 * if we are lazy, try to quit ...
2342 i=print_calc(im,calcpr);
2345 #ifdef WITH_PIECHART
2348 ) || lazy) return 0;
2350 #ifdef WITH_PIECHART
2351 /* If there's only the pie chart to draw, signal this */
2352 if (i==0) piechart=2;
2355 /* get actual drawing data and find min and max values*/
2356 if(data_proc(im)==-1)
2359 if(!im->logarithmic){si_unit(im);} /* identify si magnitude Kilo, Mega Giga ? */
2361 if(!im->rigid && ! im->logarithmic)
2362 expand_range(im); /* make sure the upper and lower limit are
2365 if (!calc_horizontal_grid(im))
2372 /**************************************************************
2373 *** Calculating sizes and locations became a bit confusing ***
2374 *** so I moved this into a separate function. ***
2375 **************************************************************/
2376 if(graph_size_location(im,i
2377 #ifdef WITH_PIECHART
2383 /* the actual graph is created by going through the individual
2384 graph elements and then drawing them */
2386 node=gfx_new_area ( im->canvas,
2390 im->graph_col[GRC_BACK]);
2392 gfx_add_point(node,0, im->yimg);
2394 #ifdef WITH_PIECHART
2395 if (piechart != 2) {
2397 node=gfx_new_area ( im->canvas,
2398 im->xorigin, im->yorigin,
2399 im->xorigin + im->xsize, im->yorigin,
2400 im->xorigin + im->xsize, im->yorigin-im->ysize,
2401 im->graph_col[GRC_CANVAS]);
2403 gfx_add_point(node,im->xorigin, im->yorigin - im->ysize);
2405 if (im->minval > 0.0)
2406 areazero = im->minval;
2407 if (im->maxval < 0.0)
2408 areazero = im->maxval;
2409 #ifdef WITH_PIECHART
2413 #ifdef WITH_PIECHART
2415 pie_part(im,im->graph_col[GRC_CANVAS],im->pie_x,im->pie_y,im->piesize*0.5,0,2*M_PI);
2419 for(i=0;i<im->gdes_c;i++){
2420 switch(im->gdes[i].gf){
2433 for (ii = 0; ii < im->xsize; ii++)
2435 if (!isnan(im->gdes[i].p_data[ii]) &&
2436 im->gdes[i].p_data[ii] > 0.0)
2438 /* generate a tick */
2439 gfx_new_line(im->canvas, im -> xorigin + ii,
2440 im -> yorigin - (im -> gdes[i].yrule * im -> ysize),
2444 im -> gdes[i].col );
2450 stack_gf = im->gdes[i].gf;
2452 /* fix data points at oo and -oo */
2453 for(ii=0;ii<im->xsize;ii++){
2454 if (isinf(im->gdes[i].p_data[ii])){
2455 if (im->gdes[i].p_data[ii] > 0) {
2456 im->gdes[i].p_data[ii] = im->maxval ;
2458 im->gdes[i].p_data[ii] = im->minval ;
2464 /* *******************************************************
2469 -------|--t-1--t--------------------------------
2471 if we know the value at time t was a then
2472 we draw a square from t-1 to t with the value a.
2474 ********************************************************* */
2475 if (im->gdes[i].col != 0x0){
2476 /* GF_LINE and friend */
2477 if(stack_gf == GF_LINE ){
2479 for(ii=1;ii<im->xsize;ii++){
2480 if (isnan(im->gdes[i].p_data[ii]) || (im->slopemode==1 && isnan(im->gdes[i].p_data[ii-1]))){
2484 if ( node == NULL ) {
2485 if ( im->slopemode == 0 ){
2486 node = gfx_new_line(im->canvas,
2487 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii]),
2488 ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]),
2489 im->gdes[i].linewidth,
2492 node = gfx_new_line(im->canvas,
2493 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii-1]),
2494 ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]),
2495 im->gdes[i].linewidth,
2499 if ( im->slopemode==0 ){
2500 gfx_add_point(node,ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii]));
2502 gfx_add_point(node,ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]));
2507 float ybase0 = DNAN,ytop0=DNAN;
2508 for(ii=0;ii<im->xsize;ii++){
2509 /* keep things simple for now, just draw these bars
2510 do not try to build a big and complex area */
2512 if ( im->slopemode == 0 && ii==0){
2515 if ( isnan(im->gdes[i].p_data[ii]) ) {
2519 ytop = ytr(im,im->gdes[i].p_data[ii]);
2520 if ( lastgdes && im->gdes[i].stack ) {
2521 ybase = ytr(im,lastgdes->p_data[ii]);
2523 ybase = ytr(im,areazero);
2525 if ( ybase == ytop ){
2529 /* every area has to be wound clock-wise,
2530 so we have to make sur base remains base */
2536 if ( im->slopemode == 0){
2540 if ( !isnan(ybase0) ){
2541 node = gfx_new_area(im->canvas,
2542 ii-1+im->xorigin,ybase0,
2543 ii-1+im->xorigin,ytop0,
2544 ii+im->xorigin,ytop,
2548 ii+im->xorigin,ybase
2554 } /* else GF_LINE */
2555 } /* if color != 0x0 */
2556 /* make sure we do not run into trouble when stacking on NaN */
2557 for(ii=0;ii<im->xsize;ii++){
2558 if (isnan(im->gdes[i].p_data[ii])) {
2559 if (lastgdes && (im->gdes[i].stack)) {
2560 im->gdes[i].p_data[ii] = lastgdes->p_data[ii];
2562 im->gdes[i].p_data[ii] = ytr(im,areazero);
2566 lastgdes = &(im->gdes[i]);
2568 #ifdef WITH_PIECHART
2570 if(isnan(im->gdes[i].yrule)) /* fetch variable */
2571 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2573 if (finite(im->gdes[i].yrule)) { /* even the fetched var can be NaN */
2574 pie_part(im,im->gdes[i].col,
2575 im->pie_x,im->pie_y,im->piesize*0.4,
2576 M_PI*2.0*PieStart/100.0,
2577 M_PI*2.0*(PieStart+im->gdes[i].yrule)/100.0);
2578 PieStart += im->gdes[i].yrule;
2585 #ifdef WITH_PIECHART
2593 /* grid_paint also does the text */
2594 if( !(im->extra_flags & ONLY_GRAPH) )
2598 if( !(im->extra_flags & ONLY_GRAPH) )
2601 /* the RULES are the last thing to paint ... */
2602 for(i=0;i<im->gdes_c;i++){
2604 switch(im->gdes[i].gf){
2606 if(isnan(im->gdes[i].yrule)) { /* fetch variable */
2607 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2609 if(im->gdes[i].yrule >= im->minval
2610 && im->gdes[i].yrule <= im->maxval)
2611 gfx_new_line(im->canvas,
2612 im->xorigin,ytr(im,im->gdes[i].yrule),
2613 im->xorigin+im->xsize,ytr(im,im->gdes[i].yrule),
2614 1.0,im->gdes[i].col);
2617 if(im->gdes[i].xrule == 0) { /* fetch variable */
2618 im->gdes[i].xrule = im->gdes[im->gdes[i].vidx].vf.when;
2620 if(im->gdes[i].xrule >= im->start
2621 && im->gdes[i].xrule <= im->end)
2622 gfx_new_line(im->canvas,
2623 xtr(im,im->gdes[i].xrule),im->yorigin,
2624 xtr(im,im->gdes[i].xrule),im->yorigin-im->ysize,
2625 1.0,im->gdes[i].col);
2633 if (strcmp(im->graphfile,"-")==0) {
2634 fo = im->graphhandle ? im->graphhandle : stdout;
2635 #if defined(WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
2636 /* Change translation mode for stdout to BINARY */
2637 _setmode( _fileno( fo ), O_BINARY );
2640 if ((fo = fopen(im->graphfile,"wb")) == NULL) {
2641 rrd_set_error("Opening '%s' for write: %s",im->graphfile,
2642 rrd_strerror(errno));
2646 gfx_render (im->canvas,im->ximg,im->yimg,0x0,fo);
2647 if (strcmp(im->graphfile,"-") != 0)
2653 /*****************************************************
2655 *****************************************************/
2658 gdes_alloc(image_desc_t *im){
2661 if ((im->gdes = (graph_desc_t *) rrd_realloc(im->gdes, (im->gdes_c)
2662 * sizeof(graph_desc_t)))==NULL){
2663 rrd_set_error("realloc graph_descs");
2668 im->gdes[im->gdes_c-1].step=im->step;
2669 im->gdes[im->gdes_c-1].stack=0;
2670 im->gdes[im->gdes_c-1].debug=0;
2671 im->gdes[im->gdes_c-1].start=im->start;
2672 im->gdes[im->gdes_c-1].end=im->end;
2673 im->gdes[im->gdes_c-1].vname[0]='\0';
2674 im->gdes[im->gdes_c-1].data=NULL;
2675 im->gdes[im->gdes_c-1].ds_namv=NULL;
2676 im->gdes[im->gdes_c-1].data_first=0;
2677 im->gdes[im->gdes_c-1].p_data=NULL;
2678 im->gdes[im->gdes_c-1].rpnp=NULL;
2679 im->gdes[im->gdes_c-1].shift=0;
2680 im->gdes[im->gdes_c-1].col = 0x0;
2681 im->gdes[im->gdes_c-1].legend[0]='\0';
2682 im->gdes[im->gdes_c-1].format[0]='\0';
2683 im->gdes[im->gdes_c-1].rrd[0]='\0';
2684 im->gdes[im->gdes_c-1].ds=-1;
2685 im->gdes[im->gdes_c-1].p_data=NULL;
2686 im->gdes[im->gdes_c-1].yrule=DNAN;
2687 im->gdes[im->gdes_c-1].xrule=0;
2691 /* copies input untill the first unescaped colon is found
2692 or until input ends. backslashes have to be escaped as well */
2694 scan_for_col(char *input, int len, char *output)
2699 input[inp] != ':' &&
2702 if (input[inp] == '\\' &&
2703 input[inp+1] != '\0' &&
2704 (input[inp+1] == '\\' ||
2705 input[inp+1] == ':')){
2706 output[outp++] = input[++inp];
2709 output[outp++] = input[inp];
2712 output[outp] = '\0';
2715 /* Some surgery done on this function, it became ridiculously big.
2717 ** - initializing now in rrd_graph_init()
2718 ** - options parsing now in rrd_graph_options()
2719 ** - script parsing now in rrd_graph_script()
2722 rrd_graph(int argc, char **argv, char ***prdata, int *xsize, int *ysize, FILE *stream, double *ymin, double *ymax)
2725 rrd_graph_init(&im);
2726 im.graphhandle = stream;
2728 rrd_graph_options(argc,argv,&im);
2729 if (rrd_test_error()) {
2734 if (strlen(argv[optind])>=MAXPATH) {
2735 rrd_set_error("filename (including path) too long");
2739 strncpy(im.graphfile,argv[optind],MAXPATH-1);
2740 im.graphfile[MAXPATH-1]='\0';
2742 rrd_graph_script(argc,argv,&im,1);
2743 if (rrd_test_error()) {
2748 /* Everything is now read and the actual work can start */
2751 if (graph_paint(&im,prdata)==-1){
2756 /* The image is generated and needs to be output.
2757 ** Also, if needed, print a line with information about the image.
2767 /* maybe prdata is not allocated yet ... lets do it now */
2768 if ((*prdata = calloc(2,sizeof(char *)))==NULL) {
2769 rrd_set_error("malloc imginfo");
2773 if(((*prdata)[0] = malloc((strlen(im.imginfo)+200+strlen(im.graphfile))*sizeof(char)))
2775 rrd_set_error("malloc imginfo");
2778 filename=im.graphfile+strlen(im.graphfile);
2779 while(filename > im.graphfile) {
2780 if (*(filename-1)=='/' || *(filename-1)=='\\' ) break;
2784 sprintf((*prdata)[0],im.imginfo,filename,(long)(im.canvas->zoom*im.ximg),(long)(im.canvas->zoom*im.yimg));
2791 rrd_graph_init(image_desc_t *im)
2798 #ifdef HAVE_SETLOCALE
2799 setlocale(LC_TIME,"");
2804 im->xlab_user.minsec = -1;
2810 im->ylegend[0] = '\0';
2811 im->title[0] = '\0';
2814 im->unitsexponent= 9999;
2817 im->viewfactor = 1.0;
2824 im->logarithmic = 0;
2825 im->ygridstep = DNAN;
2826 im->draw_x_grid = 1;
2827 im->draw_y_grid = 1;
2832 im->canvas = gfx_new_canvas();
2833 im->grid_dash_on = 1;
2834 im->grid_dash_off = 1;
2835 im->tabwidth = 40.0;
2837 for(i=0;i<DIM(graph_col);i++)
2838 im->graph_col[i]=graph_col[i];
2840 #if defined(WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
2843 char rrd_win_default_font[1000];
2844 windir = getenv("windir");
2845 /* %windir% is something like D:\windows or C:\winnt */
2846 if (windir != NULL) {
2847 strncpy(rrd_win_default_font,windir,999);
2848 rrd_win_default_font[999] = '\0';
2849 strcat(rrd_win_default_font,"\\fonts\\");
2850 strcat(rrd_win_default_font,RRD_DEFAULT_FONT);
2851 for(i=0;i<DIM(text_prop);i++){
2852 strncpy(text_prop[i].font,rrd_win_default_font,sizeof(text_prop[i].font)-1);
2853 text_prop[i].font[sizeof(text_prop[i].font)-1] = '\0';
2860 deffont = getenv("RRD_DEFAULT_FONT");
2861 if (deffont != NULL) {
2862 for(i=0;i<DIM(text_prop);i++){
2863 strncpy(text_prop[i].font,deffont,sizeof(text_prop[i].font)-1);
2864 text_prop[i].font[sizeof(text_prop[i].font)-1] = '\0';
2868 for(i=0;i<DIM(text_prop);i++){
2869 im->text_prop[i].size = text_prop[i].size;
2870 strcpy(im->text_prop[i].font,text_prop[i].font);
2875 rrd_graph_options(int argc, char *argv[],image_desc_t *im)
2878 char *parsetime_error = NULL;
2879 char scan_gtm[12],scan_mtm[12],scan_ltm[12],col_nam[12];
2880 time_t start_tmp=0,end_tmp=0;
2882 struct rrd_time_value start_tv, end_tv;
2884 optind = 0; opterr = 0; /* initialize getopt */
2886 parsetime("end-24h", &start_tv);
2887 parsetime("now", &end_tv);
2890 static struct option long_options[] =
2892 {"start", required_argument, 0, 's'},
2893 {"end", required_argument, 0, 'e'},
2894 {"x-grid", required_argument, 0, 'x'},
2895 {"y-grid", required_argument, 0, 'y'},
2896 {"vertical-label",required_argument,0,'v'},
2897 {"width", required_argument, 0, 'w'},
2898 {"height", required_argument, 0, 'h'},
2899 {"interlaced", no_argument, 0, 'i'},
2900 {"upper-limit",required_argument, 0, 'u'},
2901 {"lower-limit",required_argument, 0, 'l'},
2902 {"rigid", no_argument, 0, 'r'},
2903 {"base", required_argument, 0, 'b'},
2904 {"logarithmic",no_argument, 0, 'o'},
2905 {"color", required_argument, 0, 'c'},
2906 {"font", required_argument, 0, 'n'},
2907 {"title", required_argument, 0, 't'},
2908 {"imginfo", required_argument, 0, 'f'},
2909 {"imgformat", required_argument, 0, 'a'},
2910 {"lazy", no_argument, 0, 'z'},
2911 {"zoom", required_argument, 0, 'm'},
2912 {"no-legend", no_argument, 0, 'g'},
2913 {"force-rules-legend",no_argument,0, 'F'},
2914 {"only-graph", no_argument, 0, 'j'},
2915 {"alt-y-grid", no_argument, 0, 'Y'},
2916 {"no-minor", no_argument, 0, 'I'},
2917 {"slope-mode", no_argument, 0, 'E'},
2918 {"alt-autoscale", no_argument, 0, 'A'},
2919 {"alt-autoscale-max", no_argument, 0, 'M'},
2920 {"no-gridfit", no_argument, 0, 'N'},
2921 {"units-exponent",required_argument, 0, 'X'},
2922 {"units-length",required_argument, 0, 'L'},
2923 {"step", required_argument, 0, 'S'},
2924 {"tabwidth", required_argument, 0, 'T'},
2925 {"font-render-mode", required_argument, 0, 'R'},
2926 {"font-smoothing-threshold", required_argument, 0, 'B'},
2928 int option_index = 0;
2930 int col_start,col_end;
2932 opt = getopt_long(argc, argv,
2933 "s:e:x:y:v:w:h:iu:l:rb:oc:n:m:t:f:a:I:zgjFYAMEX:L:S:T:NR:B:",
2934 long_options, &option_index);
2941 im->extra_flags |= NOMINOR;
2944 im->extra_flags |= ALTYGRID;
2947 im->extra_flags |= ALTAUTOSCALE;
2950 im->extra_flags |= ALTAUTOSCALE_MAX;
2953 im->extra_flags |= ONLY_GRAPH;
2956 im->extra_flags |= NOLEGEND;
2959 im->extra_flags |= FORCE_RULES_LEGEND;
2962 im->unitsexponent = atoi(optarg);
2965 im->unitslength = atoi(optarg);
2968 im->tabwidth = atof(optarg);
2971 im->step = atoi(optarg);
2977 if ((parsetime_error = parsetime(optarg, &start_tv))) {
2978 rrd_set_error( "start time: %s", parsetime_error );
2983 if ((parsetime_error = parsetime(optarg, &end_tv))) {
2984 rrd_set_error( "end time: %s", parsetime_error );
2989 if(strcmp(optarg,"none") == 0){
2995 "%10[A-Z]:%ld:%10[A-Z]:%ld:%10[A-Z]:%ld:%ld:%n",
2997 &im->xlab_user.gridst,
2999 &im->xlab_user.mgridst,
3001 &im->xlab_user.labst,
3002 &im->xlab_user.precis,
3003 &stroff) == 7 && stroff != 0){
3004 strncpy(im->xlab_form, optarg+stroff, sizeof(im->xlab_form) - 1);
3005 im->xlab_form[sizeof(im->xlab_form)-1] = '\0';
3006 if((int)(im->xlab_user.gridtm = tmt_conv(scan_gtm)) == -1){
3007 rrd_set_error("unknown keyword %s",scan_gtm);
3009 } else if ((int)(im->xlab_user.mgridtm = tmt_conv(scan_mtm)) == -1){
3010 rrd_set_error("unknown keyword %s",scan_mtm);
3012 } else if ((int)(im->xlab_user.labtm = tmt_conv(scan_ltm)) == -1){
3013 rrd_set_error("unknown keyword %s",scan_ltm);
3016 im->xlab_user.minsec = 1;
3017 im->xlab_user.stst = im->xlab_form;
3019 rrd_set_error("invalid x-grid format");
3025 if(strcmp(optarg,"none") == 0){
3033 &im->ylabfact) == 2) {
3034 if(im->ygridstep<=0){
3035 rrd_set_error("grid step must be > 0");
3037 } else if (im->ylabfact < 1){
3038 rrd_set_error("label factor must be > 0");
3042 rrd_set_error("invalid y-grid format");
3047 strncpy(im->ylegend,optarg,150);
3048 im->ylegend[150]='\0';
3051 im->maxval = atof(optarg);
3054 im->minval = atof(optarg);
3057 im->base = atol(optarg);
3058 if(im->base != 1024 && im->base != 1000 ){
3059 rrd_set_error("the only sensible value for base apart from 1000 is 1024");
3064 long_tmp = atol(optarg);
3065 if (long_tmp < 10) {
3066 rrd_set_error("width below 10 pixels");
3069 im->xsize = long_tmp;
3072 long_tmp = atol(optarg);
3073 if (long_tmp < 10) {
3074 rrd_set_error("height below 10 pixels");
3077 im->ysize = long_tmp;
3080 im->canvas->interlaced = 1;
3086 im->imginfo = optarg;
3089 if((int)(im->canvas->imgformat = if_conv(optarg)) == -1) {
3090 rrd_set_error("unsupported graphics format '%s'",optarg);
3102 im->logarithmic = 1;
3103 if (isnan(im->minval))
3108 "%10[A-Z]#%n%8lx%n",
3109 col_nam,&col_start,&color,&col_end) == 2){
3111 int col_len = col_end - col_start;
3114 color = (color << 8) + 0xff /* shift left by 8 */;
3119 rrd_set_error("the color format is #RRGGBB[AA]");
3122 if((ci=grc_conv(col_nam)) != -1){
3123 im->graph_col[ci]=color;
3125 rrd_set_error("invalid color name '%s'",col_nam);
3129 rrd_set_error("invalid color def format");
3139 "%10[A-Z]:%lf:%1000s",
3140 prop,&size,font) == 3){
3142 if((sindex=text_prop_conv(prop)) != -1){
3143 im->text_prop[sindex].size=size;
3144 strcpy(im->text_prop[sindex].font,font);
3145 if (sindex==0) { /* the default */
3146 im->text_prop[TEXT_PROP_TITLE].size=size;
3147 strcpy(im->text_prop[TEXT_PROP_TITLE].font,font);
3148 im->text_prop[TEXT_PROP_AXIS].size=size;
3149 strcpy(im->text_prop[TEXT_PROP_AXIS].font,font);
3150 im->text_prop[TEXT_PROP_UNIT].size=size;
3151 strcpy(im->text_prop[TEXT_PROP_UNIT].font,font);
3152 im->text_prop[TEXT_PROP_LEGEND].size=size;
3153 strcpy(im->text_prop[TEXT_PROP_LEGEND].font,font);
3156 rrd_set_error("invalid fonttag '%s'",prop);
3160 rrd_set_error("invalid text property format");
3166 im->canvas->zoom = atof(optarg);
3167 if (im->canvas->zoom <= 0.0) {
3168 rrd_set_error("zoom factor must be > 0");
3173 strncpy(im->title,optarg,150);
3174 im->title[150]='\0';
3178 if ( strcmp( optarg, "normal" ) == 0 )
3179 im->canvas->aa_type = AA_NORMAL;
3180 else if ( strcmp( optarg, "light" ) == 0 )
3181 im->canvas->aa_type = AA_LIGHT;
3182 else if ( strcmp( optarg, "mono" ) == 0 )
3183 im->canvas->aa_type = AA_NONE;
3186 rrd_set_error("unknown font-render-mode '%s'", optarg );
3192 im->canvas->font_aa_threshold = atof(optarg);
3197 rrd_set_error("unknown option '%c'", optopt);
3199 rrd_set_error("unknown option '%s'",argv[optind-1]);
3204 if (optind >= argc) {
3205 rrd_set_error("missing filename");
3209 if (im->logarithmic == 1 && (im->minval <= 0 || isnan(im->minval))){
3210 rrd_set_error("for a logarithmic yaxis you must specify a lower-limit > 0");
3214 if (proc_start_end(&start_tv,&end_tv,&start_tmp,&end_tmp) == -1){
3215 /* error string is set in parsetime.c */
3219 if (start_tmp < 3600*24*365*10){
3220 rrd_set_error("the first entry to fetch should be after 1980 (%ld)",start_tmp);
3224 if (end_tmp < start_tmp) {
3225 rrd_set_error("start (%ld) should be less than end (%ld)",
3226 start_tmp, end_tmp);
3230 im->start = start_tmp;
3232 im->step = max((long)im->step, (im->end-im->start)/im->xsize);
3236 rrd_graph_check_vname(image_desc_t *im, char *varname, char *err)
3238 if ((im->gdes[im->gdes_c-1].vidx=find_var(im,varname))==-1) {
3239 rrd_set_error("Unknown variable '%s' in %s",varname,err);
3245 rrd_graph_color(image_desc_t *im, char *var, char *err, int optional)
3248 graph_desc_t *gdp=&im->gdes[im->gdes_c-1];
3250 color=strstr(var,"#");
3253 rrd_set_error("Found no color in %s",err);
3262 rest=strstr(color,":");
3270 sscanf(color,"#%6lx%n",&col,&n);
3271 col = (col << 8) + 0xff /* shift left by 8 */;
3272 if (n!=7) rrd_set_error("Color problem in %s",err);
3275 sscanf(color,"#%8lx%n",&col,&n);
3278 rrd_set_error("Color problem in %s",err);
3280 if (rrd_test_error()) return 0;
3287 int bad_format(char *fmt) {
3291 while (*ptr != '\0')
3292 if (*ptr++ == '%') {
3294 /* line cannot end with percent char */
3295 if (*ptr == '\0') return 1;
3297 /* '%s', '%S' and '%%' are allowed */
3298 if (*ptr == 's' || *ptr == 'S' || *ptr == '%') ptr++;
3300 /* or else '% 6.2lf' and such are allowed */
3303 /* optional padding character */
3304 if (*ptr == ' ' || *ptr == '+' || *ptr == '-') ptr++;
3306 /* This should take care of 'm.n' with all three optional */
3307 while (*ptr >= '0' && *ptr <= '9') ptr++;
3308 if (*ptr == '.') ptr++;
3309 while (*ptr >= '0' && *ptr <= '9') ptr++;
3311 /* Either 'le', 'lf' or 'lg' must follow here */
3312 if (*ptr++ != 'l') return 1;
3313 if (*ptr == 'e' || *ptr == 'f' || *ptr == 'g') ptr++;
3324 vdef_parse(gdes,str)
3325 struct graph_desc_t *gdes;
3328 /* A VDEF currently is either "func" or "param,func"
3329 * so the parsing is rather simple. Change if needed.
3336 sscanf(str,"%le,%29[A-Z]%n",¶m,func,&n);
3337 if (n== (int)strlen(str)) { /* matched */
3341 sscanf(str,"%29[A-Z]%n",func,&n);
3342 if (n== (int)strlen(str)) { /* matched */
3345 rrd_set_error("Unknown function string '%s' in VDEF '%s'"
3352 if (!strcmp("PERCENT",func)) gdes->vf.op = VDEF_PERCENT;
3353 else if (!strcmp("MAXIMUM",func)) gdes->vf.op = VDEF_MAXIMUM;
3354 else if (!strcmp("AVERAGE",func)) gdes->vf.op = VDEF_AVERAGE;
3355 else if (!strcmp("MINIMUM",func)) gdes->vf.op = VDEF_MINIMUM;
3356 else if (!strcmp("TOTAL", func)) gdes->vf.op = VDEF_TOTAL;
3357 else if (!strcmp("FIRST", func)) gdes->vf.op = VDEF_FIRST;
3358 else if (!strcmp("LAST", func)) gdes->vf.op = VDEF_LAST;
3360 rrd_set_error("Unknown function '%s' in VDEF '%s'\n"
3367 switch (gdes->vf.op) {
3369 if (isnan(param)) { /* no parameter given */
3370 rrd_set_error("Function '%s' needs parameter in VDEF '%s'\n"
3376 if (param>=0.0 && param<=100.0) {
3377 gdes->vf.param = param;
3378 gdes->vf.val = DNAN; /* undefined */
3379 gdes->vf.when = 0; /* undefined */
3381 rrd_set_error("Parameter '%f' out of range in VDEF '%s'\n"
3395 gdes->vf.param = DNAN;
3396 gdes->vf.val = DNAN;
3399 rrd_set_error("Function '%s' needs no parameter in VDEF '%s'\n"
3416 graph_desc_t *src,*dst;
3420 dst = &im->gdes[gdi];
3421 src = &im->gdes[dst->vidx];
3422 data = src->data + src->ds;
3423 steps = (src->end - src->start) / src->step;
3426 printf("DEBUG: start == %lu, end == %lu, %lu steps\n"
3433 switch (dst->vf.op) {
3434 case VDEF_PERCENT: {
3435 rrd_value_t * array;
3439 if ((array = malloc(steps*sizeof(double)))==NULL) {
3440 rrd_set_error("malloc VDEV_PERCENT");
3443 for (step=0;step < steps; step++) {
3444 array[step]=data[step*src->ds_cnt];
3446 qsort(array,step,sizeof(double),vdef_percent_compar);
3448 field = (steps-1)*dst->vf.param/100;
3449 dst->vf.val = array[field];
3450 dst->vf.when = 0; /* no time component */
3453 for(step=0;step<steps;step++)
3454 printf("DEBUG: %3li:%10.2f %c\n",step,array[step],step==field?'*':' ');
3460 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3461 if (step == steps) {
3465 dst->vf.val = data[step*src->ds_cnt];
3466 dst->vf.when = src->start + (step+1)*src->step;
3468 while (step != steps) {
3469 if (finite(data[step*src->ds_cnt])) {
3470 if (data[step*src->ds_cnt] > dst->vf.val) {
3471 dst->vf.val = data[step*src->ds_cnt];
3472 dst->vf.when = src->start + (step+1)*src->step;
3479 case VDEF_AVERAGE: {
3482 for (step=0;step<steps;step++) {
3483 if (finite(data[step*src->ds_cnt])) {
3484 sum += data[step*src->ds_cnt];
3489 if (dst->vf.op == VDEF_TOTAL) {
3490 dst->vf.val = sum*src->step;
3491 dst->vf.when = cnt*src->step; /* not really "when" */
3493 dst->vf.val = sum/cnt;
3494 dst->vf.when = 0; /* no time component */
3504 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3505 if (step == steps) {
3509 dst->vf.val = data[step*src->ds_cnt];
3510 dst->vf.when = src->start + (step+1)*src->step;
3512 while (step != steps) {
3513 if (finite(data[step*src->ds_cnt])) {
3514 if (data[step*src->ds_cnt] < dst->vf.val) {
3515 dst->vf.val = data[step*src->ds_cnt];
3516 dst->vf.when = src->start + (step+1)*src->step;
3523 /* The time value returned here is one step before the
3524 * actual time value. This is the start of the first
3528 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3529 if (step == steps) { /* all entries were NaN */
3533 dst->vf.val = data[step*src->ds_cnt];
3534 dst->vf.when = src->start + step*src->step;
3538 /* The time value returned here is the
3539 * actual time value. This is the end of the last
3543 while (step >= 0 && isnan(data[step*src->ds_cnt])) step--;
3544 if (step < 0) { /* all entries were NaN */
3548 dst->vf.val = data[step*src->ds_cnt];
3549 dst->vf.when = src->start + (step+1)*src->step;
3556 /* NaN < -INF < finite_values < INF */
3558 vdef_percent_compar(a,b)
3561 /* Equality is not returned; this doesn't hurt except
3562 * (maybe) for a little performance.
3565 /* First catch NaN values. They are smallest */
3566 if (isnan( *(double *)a )) return -1;
3567 if (isnan( *(double *)b )) return 1;
3569 /* NaN doesn't reach this part so INF and -INF are extremes.
3570 * The sign from isinf() is compatible with the sign we return
3572 if (isinf( *(double *)a )) return isinf( *(double *)a );
3573 if (isinf( *(double *)b )) return isinf( *(double *)b );
3575 /* If we reach this, both values must be finite */
3576 if ( *(double *)a < *(double *)b ) return -1; else return 1;