1 /****************************************************************************
2 * RRDtool 1.2.3 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 * 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 12, (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 ) | 0x00000066,
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) {
1992 boxH = 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,"M", 0)*1.2;
1998 /* make sure transparent colors show up all the same */
1999 node = gfx_new_area(im->canvas,
2003 im->graph_col[GRC_CANVAS]);
2004 gfx_add_point ( node, X0+boxH, Y0-boxV );
2006 node = gfx_new_area(im->canvas,
2011 gfx_add_point ( node, X0+boxH, Y0-boxV );
2012 node = gfx_new_line(im->canvas,
2014 1,im->graph_col[GRC_FONT]);
2015 gfx_add_point(node,X0+boxH,Y0);
2016 gfx_add_point(node,X0+boxH,Y0-boxV);
2017 gfx_close_path(node);
2024 /*****************************************************
2025 * lazy check make sure we rely need to create this graph
2026 *****************************************************/
2028 int lazy_check(image_desc_t *im){
2031 struct stat imgstat;
2033 if (im->lazy == 0) return 0; /* no lazy option */
2034 if (stat(im->graphfile,&imgstat) != 0)
2035 return 0; /* can't stat */
2036 /* one pixel in the existing graph is more then what we would
2038 if (time(NULL) - imgstat.st_mtime >
2039 (im->end - im->start) / im->xsize)
2041 if ((fd = fopen(im->graphfile,"rb")) == NULL)
2042 return 0; /* the file does not exist */
2043 switch (im->canvas->imgformat) {
2045 size = PngSize(fd,&(im->ximg),&(im->yimg));
2054 #ifdef WITH_PIECHART
2056 pie_part(image_desc_t *im, gfx_color_t color,
2057 double PieCenterX, double PieCenterY, double Radius,
2058 double startangle, double endangle)
2062 double step=M_PI/50; /* Number of iterations for the circle;
2063 ** 10 is definitely too low, more than
2064 ** 50 seems to be overkill
2067 /* Strange but true: we have to work clockwise or else
2068 ** anti aliasing nor transparency don't work.
2070 ** This test is here to make sure we do it right, also
2071 ** this makes the for...next loop more easy to implement.
2072 ** The return will occur if the user enters a negative number
2073 ** (which shouldn't be done according to the specs) or if the
2074 ** programmers do something wrong (which, as we all know, never
2075 ** happens anyway :)
2077 if (endangle<startangle) return;
2079 /* Hidden feature: Radius decreases each full circle */
2081 while (angle>=2*M_PI) {
2086 node=gfx_new_area(im->canvas,
2087 PieCenterX+sin(startangle)*Radius,
2088 PieCenterY-cos(startangle)*Radius,
2091 PieCenterX+sin(endangle)*Radius,
2092 PieCenterY-cos(endangle)*Radius,
2094 for (angle=endangle;angle-startangle>=step;angle-=step) {
2096 PieCenterX+sin(angle)*Radius,
2097 PieCenterY-cos(angle)*Radius );
2104 graph_size_location(image_desc_t *im, int elements
2106 #ifdef WITH_PIECHART
2112 /* The actual size of the image to draw is determined from
2113 ** several sources. The size given on the command line is
2114 ** the graph area but we need more as we have to draw labels
2115 ** and other things outside the graph area
2118 /* +-+-------------------------------------------+
2119 ** |l|.................title.....................|
2120 ** |e+--+-------------------------------+--------+
2123 ** |l| l| main graph area | chart |
2126 ** |r+--+-------------------------------+--------+
2127 ** |e| | x-axis labels | |
2128 ** |v+--+-------------------------------+--------+
2129 ** | |..............legends......................|
2130 ** +-+-------------------------------------------+
2136 #ifdef WITH_PIECHART
2141 Xlegend =0, Ylegend =0,
2143 Xspacing =15, Yspacing =15;
2145 if (im->extra_flags & ONLY_GRAPH) {
2147 im->ximg = im->xsize;
2148 im->yimg = im->ysize;
2149 im->yorigin = im->ysize;
2153 if (im->ylegend[0] != '\0' ) {
2154 Xvertical = im->text_prop[TEXT_PROP_UNIT].size *2;
2158 if (im->title[0] != '\0') {
2159 /* The title is placed "inbetween" two text lines so it
2160 ** automatically has some vertical spacing. The horizontal
2161 ** spacing is added here, on each side.
2163 /* don't care for the with of the title
2164 Xtitle = gfx_get_text_width(im->canvas, 0,
2165 im->text_prop[TEXT_PROP_TITLE].font,
2166 im->text_prop[TEXT_PROP_TITLE].size,
2168 im->title, 0) + 2*Xspacing; */
2169 Ytitle = im->text_prop[TEXT_PROP_TITLE].size*2.6+10;
2175 if (im->draw_x_grid) {
2176 Yxlabel=im->text_prop[TEXT_PROP_AXIS].size *2.5;
2178 if (im->draw_y_grid) {
2179 Xylabel=gfx_get_text_width(im->canvas, 0,
2180 im->text_prop[TEXT_PROP_AXIS].font,
2181 im->text_prop[TEXT_PROP_AXIS].size,
2183 "0", 0) * im->unitslength + Xspacing;
2187 #ifdef WITH_PIECHART
2189 im->piesize=im->xsize<im->ysize?im->xsize:im->ysize;
2195 /* Now calculate the total size. Insert some spacing where
2196 desired. im->xorigin and im->yorigin need to correspond
2197 with the lower left corner of the main graph area or, if
2198 this one is not set, the imaginary box surrounding the
2201 /* The legend width cannot yet be determined, as a result we
2202 ** have problems adjusting the image to it. For now, we just
2203 ** forget about it at all; the legend will have to fit in the
2204 ** size already allocated.
2206 im->ximg = Xylabel + Xmain + 2 * Xspacing;
2208 #ifdef WITH_PIECHART
2212 if (Xmain) im->ximg += Xspacing;
2213 #ifdef WITH_PIECHART
2214 if (Xpie) im->ximg += Xspacing;
2217 im->xorigin = Xspacing + Xylabel;
2219 /* the length of the title should not influence with width of the graph
2220 if (Xtitle > im->ximg) im->ximg = Xtitle; */
2222 if (Xvertical) { /* unit description */
2223 im->ximg += Xvertical;
2224 im->xorigin += Xvertical;
2228 /* The vertical size is interesting... we need to compare
2229 ** the sum of {Ytitle, Ymain, Yxlabel, Ylegend} with Yvertical
2230 ** however we need to know {Ytitle+Ymain+Yxlabel} in order to
2231 ** start even thinking about Ylegend.
2233 ** Do it in three portions: First calculate the inner part,
2234 ** then do the legend, then adjust the total height of the img.
2237 /* reserve space for main and/or pie */
2239 im->yimg = Ymain + Yxlabel;
2241 #ifdef WITH_PIECHART
2242 if (im->yimg < Ypie) im->yimg = Ypie;
2245 im->yorigin = im->yimg - Yxlabel;
2247 /* reserve space for the title *or* some padding above the graph */
2250 im->yorigin += Ytitle;
2252 im->yimg += 1.5*Yspacing;
2253 im->yorigin += 1.5*Yspacing;
2255 /* reserve space for padding below the graph */
2256 im->yimg += Yspacing;
2259 /* Determine where to place the legends onto the image.
2260 ** Adjust im->yimg to match the space requirements.
2262 if(leg_place(im)==-1)
2267 if (Xlegend > im->ximg) {
2269 /* reposition Pie */
2273 #ifdef WITH_PIECHART
2274 /* The pie is placed in the upper right hand corner,
2275 ** just below the title (if any) and with sufficient
2279 im->pie_x = im->ximg - Xspacing - Xpie/2;
2280 im->pie_y = im->yorigin-Ymain+Ypie/2;
2282 im->pie_x = im->ximg/2;
2283 im->pie_y = im->yorigin-Ypie/2;
2290 /* draw that picture thing ... */
2292 graph_paint(image_desc_t *im, char ***calcpr)
2295 int lazy = lazy_check(im);
2296 #ifdef WITH_PIECHART
2298 double PieStart=0.0;
2303 double areazero = 0.0;
2304 enum gf_en stack_gf = GF_PRINT;
2305 graph_desc_t *lastgdes = NULL;
2307 /* if we are lazy and there is nothing to PRINT ... quit now */
2308 if (lazy && im->prt_c==0) return 0;
2310 /* pull the data from the rrd files ... */
2312 if(data_fetch(im)==-1)
2315 /* evaluate VDEF and CDEF operations ... */
2316 if(data_calc(im)==-1)
2319 #ifdef WITH_PIECHART
2320 /* check if we need to draw a piechart */
2321 for(i=0;i<im->gdes_c;i++){
2322 if (im->gdes[i].gf == GF_PART) {
2329 /* calculate and PRINT and GPRINT definitions. We have to do it at
2330 * this point because it will affect the length of the legends
2331 * if there are no graph elements we stop here ...
2332 * if we are lazy, try to quit ...
2334 i=print_calc(im,calcpr);
2337 #ifdef WITH_PIECHART
2340 ) || lazy) return 0;
2342 #ifdef WITH_PIECHART
2343 /* If there's only the pie chart to draw, signal this */
2344 if (i==0) piechart=2;
2347 /* get actual drawing data and find min and max values*/
2348 if(data_proc(im)==-1)
2351 if(!im->logarithmic){si_unit(im);} /* identify si magnitude Kilo, Mega Giga ? */
2353 if(!im->rigid && ! im->logarithmic)
2354 expand_range(im); /* make sure the upper and lower limit are
2357 if (!calc_horizontal_grid(im))
2364 /**************************************************************
2365 *** Calculating sizes and locations became a bit confusing ***
2366 *** so I moved this into a separate function. ***
2367 **************************************************************/
2368 if(graph_size_location(im,i
2369 #ifdef WITH_PIECHART
2375 /* the actual graph is created by going through the individual
2376 graph elements and then drawing them */
2378 node=gfx_new_area ( im->canvas,
2382 im->graph_col[GRC_BACK]);
2384 gfx_add_point(node,0, im->yimg);
2386 #ifdef WITH_PIECHART
2387 if (piechart != 2) {
2389 node=gfx_new_area ( im->canvas,
2390 im->xorigin, im->yorigin,
2391 im->xorigin + im->xsize, im->yorigin,
2392 im->xorigin + im->xsize, im->yorigin-im->ysize,
2393 im->graph_col[GRC_CANVAS]);
2395 gfx_add_point(node,im->xorigin, im->yorigin - im->ysize);
2397 if (im->minval > 0.0)
2398 areazero = im->minval;
2399 if (im->maxval < 0.0)
2400 areazero = im->maxval;
2401 #ifdef WITH_PIECHART
2405 #ifdef WITH_PIECHART
2407 pie_part(im,im->graph_col[GRC_CANVAS],im->pie_x,im->pie_y,im->piesize*0.5,0,2*M_PI);
2411 for(i=0;i<im->gdes_c;i++){
2412 switch(im->gdes[i].gf){
2425 for (ii = 0; ii < im->xsize; ii++)
2427 if (!isnan(im->gdes[i].p_data[ii]) &&
2428 im->gdes[i].p_data[ii] > 0.0)
2430 /* generate a tick */
2431 gfx_new_line(im->canvas, im -> xorigin + ii,
2432 im -> yorigin - (im -> gdes[i].yrule * im -> ysize),
2436 im -> gdes[i].col );
2442 stack_gf = im->gdes[i].gf;
2444 /* fix data points at oo and -oo */
2445 for(ii=0;ii<im->xsize;ii++){
2446 if (isinf(im->gdes[i].p_data[ii])){
2447 if (im->gdes[i].p_data[ii] > 0) {
2448 im->gdes[i].p_data[ii] = im->maxval ;
2450 im->gdes[i].p_data[ii] = im->minval ;
2456 /* *******************************************************
2461 -------|--t-1--t--------------------------------
2463 if we know the value at time t was a then
2464 we draw a square from t-1 to t with the value a.
2466 ********************************************************* */
2467 if (im->gdes[i].col != 0x0){
2468 /* GF_LINE and friend */
2469 if(stack_gf == GF_LINE ){
2471 for(ii=1;ii<im->xsize;ii++){
2472 if (isnan(im->gdes[i].p_data[ii]) || (im->slopemode==1 && isnan(im->gdes[i].p_data[ii-1]))){
2476 if ( node == NULL ) {
2477 if ( im->slopemode == 0 ){
2478 node = gfx_new_line(im->canvas,
2479 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii]),
2480 ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]),
2481 im->gdes[i].linewidth,
2484 node = gfx_new_line(im->canvas,
2485 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii-1]),
2486 ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]),
2487 im->gdes[i].linewidth,
2491 if ( im->slopemode==0 ){
2492 gfx_add_point(node,ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii]));
2494 gfx_add_point(node,ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]));
2499 float ybase0 = DNAN,ytop0=DNAN;
2500 for(ii=0;ii<im->xsize;ii++){
2501 /* keep things simple for now, just draw these bars
2502 do not try to build a big and complex area */
2504 if ( im->slopemode == 0 && ii==0){
2507 if ( isnan(im->gdes[i].p_data[ii]) ) {
2511 ytop = ytr(im,im->gdes[i].p_data[ii]);
2512 if ( lastgdes && im->gdes[i].stack ) {
2513 ybase = ytr(im,lastgdes->p_data[ii]);
2515 ybase = ytr(im,areazero);
2517 if ( ybase == ytop ){
2521 /* every area has to be wound clock-wise,
2522 so we have to make sur base remains base */
2528 if ( im->slopemode == 0){
2532 if ( !isnan(ybase0) ){
2533 node = gfx_new_area(im->canvas,
2534 ii-1+im->xorigin,ybase0,
2535 ii-1+im->xorigin,ytop0,
2536 ii+im->xorigin,ytop,
2540 ii+im->xorigin,ybase
2546 } /* else GF_LINE */
2547 } /* if color != 0x0 */
2548 /* make sure we do not run into trouble when stacking on NaN */
2549 for(ii=0;ii<im->xsize;ii++){
2550 if (isnan(im->gdes[i].p_data[ii])) {
2551 if (lastgdes && (im->gdes[i].stack)) {
2552 im->gdes[i].p_data[ii] = lastgdes->p_data[ii];
2554 im->gdes[i].p_data[ii] = ytr(im,areazero);
2558 lastgdes = &(im->gdes[i]);
2560 #ifdef WITH_PIECHART
2562 if(isnan(im->gdes[i].yrule)) /* fetch variable */
2563 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2565 if (finite(im->gdes[i].yrule)) { /* even the fetched var can be NaN */
2566 pie_part(im,im->gdes[i].col,
2567 im->pie_x,im->pie_y,im->piesize*0.4,
2568 M_PI*2.0*PieStart/100.0,
2569 M_PI*2.0*(PieStart+im->gdes[i].yrule)/100.0);
2570 PieStart += im->gdes[i].yrule;
2577 #ifdef WITH_PIECHART
2585 /* grid_paint also does the text */
2586 if( !(im->extra_flags & ONLY_GRAPH) )
2590 if( !(im->extra_flags & ONLY_GRAPH) )
2593 /* the RULES are the last thing to paint ... */
2594 for(i=0;i<im->gdes_c;i++){
2596 switch(im->gdes[i].gf){
2598 if(isnan(im->gdes[i].yrule)) { /* fetch variable */
2599 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2601 if(im->gdes[i].yrule >= im->minval
2602 && im->gdes[i].yrule <= im->maxval)
2603 gfx_new_line(im->canvas,
2604 im->xorigin,ytr(im,im->gdes[i].yrule),
2605 im->xorigin+im->xsize,ytr(im,im->gdes[i].yrule),
2606 1.0,im->gdes[i].col);
2609 if(im->gdes[i].xrule == 0) { /* fetch variable */
2610 im->gdes[i].xrule = im->gdes[im->gdes[i].vidx].vf.when;
2612 if(im->gdes[i].xrule >= im->start
2613 && im->gdes[i].xrule <= im->end)
2614 gfx_new_line(im->canvas,
2615 xtr(im,im->gdes[i].xrule),im->yorigin,
2616 xtr(im,im->gdes[i].xrule),im->yorigin-im->ysize,
2617 1.0,im->gdes[i].col);
2625 if (strcmp(im->graphfile,"-")==0) {
2626 fo = im->graphhandle ? im->graphhandle : stdout;
2627 #if defined(WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
2628 /* Change translation mode for stdout to BINARY */
2629 _setmode( _fileno( fo ), O_BINARY );
2632 if ((fo = fopen(im->graphfile,"wb")) == NULL) {
2633 rrd_set_error("Opening '%s' for write: %s",im->graphfile,
2634 rrd_strerror(errno));
2638 gfx_render (im->canvas,im->ximg,im->yimg,0x0,fo);
2639 if (strcmp(im->graphfile,"-") != 0)
2645 /*****************************************************
2647 *****************************************************/
2650 gdes_alloc(image_desc_t *im){
2653 if ((im->gdes = (graph_desc_t *) rrd_realloc(im->gdes, (im->gdes_c)
2654 * sizeof(graph_desc_t)))==NULL){
2655 rrd_set_error("realloc graph_descs");
2660 im->gdes[im->gdes_c-1].step=im->step;
2661 im->gdes[im->gdes_c-1].stack=0;
2662 im->gdes[im->gdes_c-1].debug=0;
2663 im->gdes[im->gdes_c-1].start=im->start;
2664 im->gdes[im->gdes_c-1].end=im->end;
2665 im->gdes[im->gdes_c-1].vname[0]='\0';
2666 im->gdes[im->gdes_c-1].data=NULL;
2667 im->gdes[im->gdes_c-1].ds_namv=NULL;
2668 im->gdes[im->gdes_c-1].data_first=0;
2669 im->gdes[im->gdes_c-1].p_data=NULL;
2670 im->gdes[im->gdes_c-1].rpnp=NULL;
2671 im->gdes[im->gdes_c-1].shift=0;
2672 im->gdes[im->gdes_c-1].col = 0x0;
2673 im->gdes[im->gdes_c-1].legend[0]='\0';
2674 im->gdes[im->gdes_c-1].format[0]='\0';
2675 im->gdes[im->gdes_c-1].rrd[0]='\0';
2676 im->gdes[im->gdes_c-1].ds=-1;
2677 im->gdes[im->gdes_c-1].p_data=NULL;
2678 im->gdes[im->gdes_c-1].yrule=DNAN;
2679 im->gdes[im->gdes_c-1].xrule=0;
2683 /* copies input untill the first unescaped colon is found
2684 or until input ends. backslashes have to be escaped as well */
2686 scan_for_col(char *input, int len, char *output)
2691 input[inp] != ':' &&
2694 if (input[inp] == '\\' &&
2695 input[inp+1] != '\0' &&
2696 (input[inp+1] == '\\' ||
2697 input[inp+1] == ':')){
2698 output[outp++] = input[++inp];
2701 output[outp++] = input[inp];
2704 output[outp] = '\0';
2707 /* Some surgery done on this function, it became ridiculously big.
2709 ** - initializing now in rrd_graph_init()
2710 ** - options parsing now in rrd_graph_options()
2711 ** - script parsing now in rrd_graph_script()
2714 rrd_graph(int argc, char **argv, char ***prdata, int *xsize, int *ysize, FILE *stream, double *ymin, double *ymax)
2717 rrd_graph_init(&im);
2718 im.graphhandle = stream;
2720 rrd_graph_options(argc,argv,&im);
2721 if (rrd_test_error()) {
2726 if (strlen(argv[optind])>=MAXPATH) {
2727 rrd_set_error("filename (including path) too long");
2731 strncpy(im.graphfile,argv[optind],MAXPATH-1);
2732 im.graphfile[MAXPATH-1]='\0';
2734 rrd_graph_script(argc,argv,&im,1);
2735 if (rrd_test_error()) {
2740 /* Everything is now read and the actual work can start */
2743 if (graph_paint(&im,prdata)==-1){
2748 /* The image is generated and needs to be output.
2749 ** Also, if needed, print a line with information about the image.
2759 /* maybe prdata is not allocated yet ... lets do it now */
2760 if ((*prdata = calloc(2,sizeof(char *)))==NULL) {
2761 rrd_set_error("malloc imginfo");
2765 if(((*prdata)[0] = malloc((strlen(im.imginfo)+200+strlen(im.graphfile))*sizeof(char)))
2767 rrd_set_error("malloc imginfo");
2770 filename=im.graphfile+strlen(im.graphfile);
2771 while(filename > im.graphfile) {
2772 if (*(filename-1)=='/' || *(filename-1)=='\\' ) break;
2776 sprintf((*prdata)[0],im.imginfo,filename,(long)(im.canvas->zoom*im.ximg),(long)(im.canvas->zoom*im.yimg));
2783 rrd_graph_init(image_desc_t *im)
2790 #ifdef HAVE_SETLOCALE
2791 setlocale(LC_TIME,"");
2796 im->xlab_user.minsec = -1;
2802 im->ylegend[0] = '\0';
2803 im->title[0] = '\0';
2806 im->unitsexponent= 9999;
2809 im->viewfactor = 1.0;
2816 im->logarithmic = 0;
2817 im->ygridstep = DNAN;
2818 im->draw_x_grid = 1;
2819 im->draw_y_grid = 1;
2824 im->canvas = gfx_new_canvas();
2825 im->grid_dash_on = 1;
2826 im->grid_dash_off = 1;
2827 im->tabwidth = 40.0;
2829 for(i=0;i<DIM(graph_col);i++)
2830 im->graph_col[i]=graph_col[i];
2832 #if defined(WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
2835 char rrd_win_default_font[1000];
2836 windir = getenv("windir");
2837 /* %windir% is something like D:\windows or C:\winnt */
2838 if (windir != NULL) {
2839 strncpy(rrd_win_default_font,windir,999);
2840 rrd_win_default_font[999] = '\0';
2841 strcat(rrd_win_default_font,"\\fonts\\");
2842 strcat(rrd_win_default_font,RRD_DEFAULT_FONT);
2843 for(i=0;i<DIM(text_prop);i++){
2844 strncpy(text_prop[i].font,rrd_win_default_font,sizeof(text_prop[i].font)-1);
2845 text_prop[i].font[sizeof(text_prop[i].font)-1] = '\0';
2852 deffont = getenv("RRD_DEFAULT_FONT");
2853 if (deffont != NULL) {
2854 for(i=0;i<DIM(text_prop);i++){
2855 strncpy(text_prop[i].font,deffont,sizeof(text_prop[i].font)-1);
2856 text_prop[i].font[sizeof(text_prop[i].font)-1] = '\0';
2860 for(i=0;i<DIM(text_prop);i++){
2861 im->text_prop[i].size = text_prop[i].size;
2862 strcpy(im->text_prop[i].font,text_prop[i].font);
2867 rrd_graph_options(int argc, char *argv[],image_desc_t *im)
2870 char *parsetime_error = NULL;
2871 char scan_gtm[12],scan_mtm[12],scan_ltm[12],col_nam[12];
2872 time_t start_tmp=0,end_tmp=0;
2874 struct rrd_time_value start_tv, end_tv;
2876 optind = 0; opterr = 0; /* initialize getopt */
2878 parsetime("end-24h", &start_tv);
2879 parsetime("now", &end_tv);
2882 static struct option long_options[] =
2884 {"start", required_argument, 0, 's'},
2885 {"end", required_argument, 0, 'e'},
2886 {"x-grid", required_argument, 0, 'x'},
2887 {"y-grid", required_argument, 0, 'y'},
2888 {"vertical-label",required_argument,0,'v'},
2889 {"width", required_argument, 0, 'w'},
2890 {"height", required_argument, 0, 'h'},
2891 {"interlaced", no_argument, 0, 'i'},
2892 {"upper-limit",required_argument, 0, 'u'},
2893 {"lower-limit",required_argument, 0, 'l'},
2894 {"rigid", no_argument, 0, 'r'},
2895 {"base", required_argument, 0, 'b'},
2896 {"logarithmic",no_argument, 0, 'o'},
2897 {"color", required_argument, 0, 'c'},
2898 {"font", required_argument, 0, 'n'},
2899 {"title", required_argument, 0, 't'},
2900 {"imginfo", required_argument, 0, 'f'},
2901 {"imgformat", required_argument, 0, 'a'},
2902 {"lazy", no_argument, 0, 'z'},
2903 {"zoom", required_argument, 0, 'm'},
2904 {"no-legend", no_argument, 0, 'g'},
2905 {"force-rules-legend",no_argument,0, 'F'},
2906 {"only-graph", no_argument, 0, 'j'},
2907 {"alt-y-grid", no_argument, 0, 'Y'},
2908 {"no-minor", no_argument, 0, 'I'},
2909 {"slope-mode", no_argument, 0, 'E'},
2910 {"alt-autoscale", no_argument, 0, 'A'},
2911 {"alt-autoscale-max", no_argument, 0, 'M'},
2912 {"no-gridfit", no_argument, 0, 'N'},
2913 {"units-exponent",required_argument, 0, 'X'},
2914 {"units-length",required_argument, 0, 'L'},
2915 {"step", required_argument, 0, 'S'},
2916 {"tabwidth", required_argument, 0, 'T'},
2917 {"font-render-mode", required_argument, 0, 'R'},
2918 {"font-smoothing-threshold", required_argument, 0, 'B'},
2920 int option_index = 0;
2922 int col_start,col_end;
2924 opt = getopt_long(argc, argv,
2925 "s:e:x:y:v:w:h:iu:l:rb:oc:n:m:t:f:a:I:zgjFYAMEX:L:S:T:NR:B:",
2926 long_options, &option_index);
2933 im->extra_flags |= NOMINOR;
2936 im->extra_flags |= ALTYGRID;
2939 im->extra_flags |= ALTAUTOSCALE;
2942 im->extra_flags |= ALTAUTOSCALE_MAX;
2945 im->extra_flags |= ONLY_GRAPH;
2948 im->extra_flags |= NOLEGEND;
2951 im->extra_flags |= FORCE_RULES_LEGEND;
2954 im->unitsexponent = atoi(optarg);
2957 im->unitslength = atoi(optarg);
2960 im->tabwidth = atof(optarg);
2963 im->step = atoi(optarg);
2969 if ((parsetime_error = parsetime(optarg, &start_tv))) {
2970 rrd_set_error( "start time: %s", parsetime_error );
2975 if ((parsetime_error = parsetime(optarg, &end_tv))) {
2976 rrd_set_error( "end time: %s", parsetime_error );
2981 if(strcmp(optarg,"none") == 0){
2987 "%10[A-Z]:%ld:%10[A-Z]:%ld:%10[A-Z]:%ld:%ld:%n",
2989 &im->xlab_user.gridst,
2991 &im->xlab_user.mgridst,
2993 &im->xlab_user.labst,
2994 &im->xlab_user.precis,
2995 &stroff) == 7 && stroff != 0){
2996 strncpy(im->xlab_form, optarg+stroff, sizeof(im->xlab_form) - 1);
2997 im->xlab_form[sizeof(im->xlab_form)-1] = '\0';
2998 if((int)(im->xlab_user.gridtm = tmt_conv(scan_gtm)) == -1){
2999 rrd_set_error("unknown keyword %s",scan_gtm);
3001 } else if ((int)(im->xlab_user.mgridtm = tmt_conv(scan_mtm)) == -1){
3002 rrd_set_error("unknown keyword %s",scan_mtm);
3004 } else if ((int)(im->xlab_user.labtm = tmt_conv(scan_ltm)) == -1){
3005 rrd_set_error("unknown keyword %s",scan_ltm);
3008 im->xlab_user.minsec = 1;
3009 im->xlab_user.stst = im->xlab_form;
3011 rrd_set_error("invalid x-grid format");
3017 if(strcmp(optarg,"none") == 0){
3025 &im->ylabfact) == 2) {
3026 if(im->ygridstep<=0){
3027 rrd_set_error("grid step must be > 0");
3029 } else if (im->ylabfact < 1){
3030 rrd_set_error("label factor must be > 0");
3034 rrd_set_error("invalid y-grid format");
3039 strncpy(im->ylegend,optarg,150);
3040 im->ylegend[150]='\0';
3043 im->maxval = atof(optarg);
3046 im->minval = atof(optarg);
3049 im->base = atol(optarg);
3050 if(im->base != 1024 && im->base != 1000 ){
3051 rrd_set_error("the only sensible value for base apart from 1000 is 1024");
3056 long_tmp = atol(optarg);
3057 if (long_tmp < 10) {
3058 rrd_set_error("width below 10 pixels");
3061 im->xsize = long_tmp;
3064 long_tmp = atol(optarg);
3065 if (long_tmp < 10) {
3066 rrd_set_error("height below 10 pixels");
3069 im->ysize = long_tmp;
3072 im->canvas->interlaced = 1;
3078 im->imginfo = optarg;
3081 if((int)(im->canvas->imgformat = if_conv(optarg)) == -1) {
3082 rrd_set_error("unsupported graphics format '%s'",optarg);
3094 im->logarithmic = 1;
3095 if (isnan(im->minval))
3100 "%10[A-Z]#%n%8lx%n",
3101 col_nam,&col_start,&color,&col_end) == 2){
3103 int col_len = col_end - col_start;
3106 color = (color << 8) + 0xff /* shift left by 8 */;
3111 rrd_set_error("the color format is #RRGGBB[AA]");
3114 if((ci=grc_conv(col_nam)) != -1){
3115 im->graph_col[ci]=color;
3117 rrd_set_error("invalid color name '%s'",col_nam);
3121 rrd_set_error("invalid color def format");
3131 "%10[A-Z]:%lf:%1000s",
3132 prop,&size,font) == 3){
3134 if((sindex=text_prop_conv(prop)) != -1){
3135 im->text_prop[sindex].size=size;
3136 strcpy(im->text_prop[sindex].font,font);
3137 if (sindex==0) { /* the default */
3138 im->text_prop[TEXT_PROP_TITLE].size=size;
3139 strcpy(im->text_prop[TEXT_PROP_TITLE].font,font);
3140 im->text_prop[TEXT_PROP_AXIS].size=size;
3141 strcpy(im->text_prop[TEXT_PROP_AXIS].font,font);
3142 im->text_prop[TEXT_PROP_UNIT].size=size;
3143 strcpy(im->text_prop[TEXT_PROP_UNIT].font,font);
3144 im->text_prop[TEXT_PROP_LEGEND].size=size;
3145 strcpy(im->text_prop[TEXT_PROP_LEGEND].font,font);
3148 rrd_set_error("invalid fonttag '%s'",prop);
3152 rrd_set_error("invalid text property format");
3158 im->canvas->zoom = atof(optarg);
3159 if (im->canvas->zoom <= 0.0) {
3160 rrd_set_error("zoom factor must be > 0");
3165 strncpy(im->title,optarg,150);
3166 im->title[150]='\0';
3170 if ( strcmp( optarg, "normal" ) == 0 )
3171 im->canvas->aa_type = AA_NORMAL;
3172 else if ( strcmp( optarg, "light" ) == 0 )
3173 im->canvas->aa_type = AA_LIGHT;
3174 else if ( strcmp( optarg, "mono" ) == 0 )
3175 im->canvas->aa_type = AA_NONE;
3178 rrd_set_error("unknown font-render-mode '%s'", optarg );
3184 im->canvas->font_aa_threshold = atof(optarg);
3189 rrd_set_error("unknown option '%c'", optopt);
3191 rrd_set_error("unknown option '%s'",argv[optind-1]);
3196 if (optind >= argc) {
3197 rrd_set_error("missing filename");
3201 if (im->logarithmic == 1 && (im->minval <= 0 || isnan(im->minval))){
3202 rrd_set_error("for a logarithmic yaxis you must specify a lower-limit > 0");
3206 if (proc_start_end(&start_tv,&end_tv,&start_tmp,&end_tmp) == -1){
3207 /* error string is set in parsetime.c */
3211 if (start_tmp < 3600*24*365*10){
3212 rrd_set_error("the first entry to fetch should be after 1980 (%ld)",start_tmp);
3216 if (end_tmp < start_tmp) {
3217 rrd_set_error("start (%ld) should be less than end (%ld)",
3218 start_tmp, end_tmp);
3222 im->start = start_tmp;
3224 im->step = max((long)im->step, (im->end-im->start)/im->xsize);
3228 rrd_graph_check_vname(image_desc_t *im, char *varname, char *err)
3230 if ((im->gdes[im->gdes_c-1].vidx=find_var(im,varname))==-1) {
3231 rrd_set_error("Unknown variable '%s' in %s",varname,err);
3237 rrd_graph_color(image_desc_t *im, char *var, char *err, int optional)
3240 graph_desc_t *gdp=&im->gdes[im->gdes_c-1];
3242 color=strstr(var,"#");
3245 rrd_set_error("Found no color in %s",err);
3254 rest=strstr(color,":");
3262 sscanf(color,"#%6lx%n",&col,&n);
3263 col = (col << 8) + 0xff /* shift left by 8 */;
3264 if (n!=7) rrd_set_error("Color problem in %s",err);
3267 sscanf(color,"#%8lx%n",&col,&n);
3270 rrd_set_error("Color problem in %s",err);
3272 if (rrd_test_error()) return 0;
3279 int bad_format(char *fmt) {
3283 while (*ptr != '\0')
3284 if (*ptr++ == '%') {
3286 /* line cannot end with percent char */
3287 if (*ptr == '\0') return 1;
3289 /* '%s', '%S' and '%%' are allowed */
3290 if (*ptr == 's' || *ptr == 'S' || *ptr == '%') ptr++;
3292 /* or else '% 6.2lf' and such are allowed */
3295 /* optional padding character */
3296 if (*ptr == ' ' || *ptr == '+' || *ptr == '-') ptr++;
3298 /* This should take care of 'm.n' with all three optional */
3299 while (*ptr >= '0' && *ptr <= '9') ptr++;
3300 if (*ptr == '.') ptr++;
3301 while (*ptr >= '0' && *ptr <= '9') ptr++;
3303 /* Either 'le', 'lf' or 'lg' must follow here */
3304 if (*ptr++ != 'l') return 1;
3305 if (*ptr == 'e' || *ptr == 'f' || *ptr == 'g') ptr++;
3316 vdef_parse(gdes,str)
3317 struct graph_desc_t *gdes;
3320 /* A VDEF currently is either "func" or "param,func"
3321 * so the parsing is rather simple. Change if needed.
3328 sscanf(str,"%le,%29[A-Z]%n",¶m,func,&n);
3329 if (n== (int)strlen(str)) { /* matched */
3333 sscanf(str,"%29[A-Z]%n",func,&n);
3334 if (n== (int)strlen(str)) { /* matched */
3337 rrd_set_error("Unknown function string '%s' in VDEF '%s'"
3344 if (!strcmp("PERCENT",func)) gdes->vf.op = VDEF_PERCENT;
3345 else if (!strcmp("MAXIMUM",func)) gdes->vf.op = VDEF_MAXIMUM;
3346 else if (!strcmp("AVERAGE",func)) gdes->vf.op = VDEF_AVERAGE;
3347 else if (!strcmp("MINIMUM",func)) gdes->vf.op = VDEF_MINIMUM;
3348 else if (!strcmp("TOTAL", func)) gdes->vf.op = VDEF_TOTAL;
3349 else if (!strcmp("FIRST", func)) gdes->vf.op = VDEF_FIRST;
3350 else if (!strcmp("LAST", func)) gdes->vf.op = VDEF_LAST;
3352 rrd_set_error("Unknown function '%s' in VDEF '%s'\n"
3359 switch (gdes->vf.op) {
3361 if (isnan(param)) { /* no parameter given */
3362 rrd_set_error("Function '%s' needs parameter in VDEF '%s'\n"
3368 if (param>=0.0 && param<=100.0) {
3369 gdes->vf.param = param;
3370 gdes->vf.val = DNAN; /* undefined */
3371 gdes->vf.when = 0; /* undefined */
3373 rrd_set_error("Parameter '%f' out of range in VDEF '%s'\n"
3387 gdes->vf.param = DNAN;
3388 gdes->vf.val = DNAN;
3391 rrd_set_error("Function '%s' needs no parameter in VDEF '%s'\n"
3408 graph_desc_t *src,*dst;
3412 dst = &im->gdes[gdi];
3413 src = &im->gdes[dst->vidx];
3414 data = src->data + src->ds;
3415 steps = (src->end - src->start) / src->step;
3418 printf("DEBUG: start == %lu, end == %lu, %lu steps\n"
3425 switch (dst->vf.op) {
3426 case VDEF_PERCENT: {
3427 rrd_value_t * array;
3431 if ((array = malloc(steps*sizeof(double)))==NULL) {
3432 rrd_set_error("malloc VDEV_PERCENT");
3435 for (step=0;step < steps; step++) {
3436 array[step]=data[step*src->ds_cnt];
3438 qsort(array,step,sizeof(double),vdef_percent_compar);
3440 field = (steps-1)*dst->vf.param/100;
3441 dst->vf.val = array[field];
3442 dst->vf.when = 0; /* no time component */
3445 for(step=0;step<steps;step++)
3446 printf("DEBUG: %3li:%10.2f %c\n",step,array[step],step==field?'*':' ');
3452 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3453 if (step == steps) {
3457 dst->vf.val = data[step*src->ds_cnt];
3458 dst->vf.when = src->start + (step+1)*src->step;
3460 while (step != steps) {
3461 if (finite(data[step*src->ds_cnt])) {
3462 if (data[step*src->ds_cnt] > dst->vf.val) {
3463 dst->vf.val = data[step*src->ds_cnt];
3464 dst->vf.when = src->start + (step+1)*src->step;
3471 case VDEF_AVERAGE: {
3474 for (step=0;step<steps;step++) {
3475 if (finite(data[step*src->ds_cnt])) {
3476 sum += data[step*src->ds_cnt];
3481 if (dst->vf.op == VDEF_TOTAL) {
3482 dst->vf.val = sum*src->step;
3483 dst->vf.when = cnt*src->step; /* not really "when" */
3485 dst->vf.val = sum/cnt;
3486 dst->vf.when = 0; /* no time component */
3496 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3497 if (step == steps) {
3501 dst->vf.val = data[step*src->ds_cnt];
3502 dst->vf.when = src->start + (step+1)*src->step;
3504 while (step != steps) {
3505 if (finite(data[step*src->ds_cnt])) {
3506 if (data[step*src->ds_cnt] < dst->vf.val) {
3507 dst->vf.val = data[step*src->ds_cnt];
3508 dst->vf.when = src->start + (step+1)*src->step;
3515 /* The time value returned here is one step before the
3516 * actual time value. This is the start of the first
3520 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3521 if (step == steps) { /* all entries were NaN */
3525 dst->vf.val = data[step*src->ds_cnt];
3526 dst->vf.when = src->start + step*src->step;
3530 /* The time value returned here is the
3531 * actual time value. This is the end of the last
3535 while (step >= 0 && isnan(data[step*src->ds_cnt])) step--;
3536 if (step < 0) { /* all entries were NaN */
3540 dst->vf.val = data[step*src->ds_cnt];
3541 dst->vf.when = src->start + (step+1)*src->step;
3548 /* NaN < -INF < finite_values < INF */
3550 vdef_percent_compar(a,b)
3553 /* Equality is not returned; this doesn't hurt except
3554 * (maybe) for a little performance.
3557 /* First catch NaN values. They are smallest */
3558 if (isnan( *(double *)a )) return -1;
3559 if (isnan( *(double *)b )) return 1;
3561 /* NaN doesn't reach this part so INF and -INF are extremes.
3562 * The sign from isinf() is compatible with the sign we return
3564 if (isinf( *(double *)a )) return isinf( *(double *)a );
3565 if (isinf( *(double *)b )) return isinf( *(double *)b );
3567 /* If we reach this, both values must be finite */
3568 if ( *(double *)a < *(double *)b ) return -1; else return 1;