1 /****************************************************************************
2 * RRDtool 1.2.6 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 */
104 0x000000FF /* frame */
111 # define DPRINT(x) (void)(printf x, printf("\n"))
117 /* initialize with xtr(im,0); */
119 xtr(image_desc_t *im,time_t mytime){
122 pixie = (double) im->xsize / (double)(im->end - im->start);
125 return (int)((double)im->xorigin
126 + pixie * ( mytime - im->start ) );
129 /* translate data values into y coordinates */
131 ytr(image_desc_t *im, double value){
136 pixie = (double) im->ysize / (im->maxval - im->minval);
138 pixie = (double) im->ysize / (log10(im->maxval) - log10(im->minval));
140 } else if(!im->logarithmic) {
141 yval = im->yorigin - pixie * (value - im->minval);
143 if (value < im->minval) {
146 yval = im->yorigin - pixie * (log10(value) - log10(im->minval));
149 /* make sure we don't return anything too unreasonable. GD lib can
150 get terribly slow when drawing lines outside its scope. This is
151 especially problematic in connection with the rigid option */
153 /* keep yval as-is */
154 } else if (yval > im->yorigin) {
155 yval = im->yorigin +0.00001;
156 } else if (yval < im->yorigin - im->ysize){
157 yval = im->yorigin - im->ysize - 0.00001;
164 /* conversion function for symbolic entry names */
167 #define conv_if(VV,VVV) \
168 if (strcmp(#VV, string) == 0) return VVV ;
170 enum gf_en gf_conv(char *string){
172 conv_if(PRINT,GF_PRINT)
173 conv_if(GPRINT,GF_GPRINT)
174 conv_if(COMMENT,GF_COMMENT)
175 conv_if(HRULE,GF_HRULE)
176 conv_if(VRULE,GF_VRULE)
177 conv_if(LINE,GF_LINE)
178 conv_if(AREA,GF_AREA)
179 conv_if(STACK,GF_STACK)
180 conv_if(TICK,GF_TICK)
182 conv_if(CDEF,GF_CDEF)
183 conv_if(VDEF,GF_VDEF)
185 conv_if(PART,GF_PART)
187 conv_if(XPORT,GF_XPORT)
188 conv_if(SHIFT,GF_SHIFT)
193 enum gfx_if_en if_conv(char *string){
203 enum tmt_en tmt_conv(char *string){
205 conv_if(SECOND,TMT_SECOND)
206 conv_if(MINUTE,TMT_MINUTE)
207 conv_if(HOUR,TMT_HOUR)
209 conv_if(WEEK,TMT_WEEK)
210 conv_if(MONTH,TMT_MONTH)
211 conv_if(YEAR,TMT_YEAR)
215 enum grc_en grc_conv(char *string){
217 conv_if(BACK,GRC_BACK)
218 conv_if(CANVAS,GRC_CANVAS)
219 conv_if(SHADEA,GRC_SHADEA)
220 conv_if(SHADEB,GRC_SHADEB)
221 conv_if(GRID,GRC_GRID)
222 conv_if(MGRID,GRC_MGRID)
223 conv_if(FONT,GRC_FONT)
224 conv_if(ARROW,GRC_ARROW)
225 conv_if(AXIS,GRC_AXIS)
226 conv_if(FRAME,GRC_FRAME)
231 enum text_prop_en text_prop_conv(char *string){
233 conv_if(DEFAULT,TEXT_PROP_DEFAULT)
234 conv_if(TITLE,TEXT_PROP_TITLE)
235 conv_if(AXIS,TEXT_PROP_AXIS)
236 conv_if(UNIT,TEXT_PROP_UNIT)
237 conv_if(LEGEND,TEXT_PROP_LEGEND)
245 im_free(image_desc_t *im)
249 if (im == NULL) return 0;
250 for(i=0;i<(unsigned)im->gdes_c;i++){
251 if (im->gdes[i].data_first){
252 /* careful here, because a single pointer can occur several times */
253 free (im->gdes[i].data);
254 if (im->gdes[i].ds_namv){
255 for (ii=0;ii<im->gdes[i].ds_cnt;ii++)
256 free(im->gdes[i].ds_namv[ii]);
257 free(im->gdes[i].ds_namv);
260 free (im->gdes[i].p_data);
261 free (im->gdes[i].rpnp);
264 gfx_destroy(im->canvas);
268 /* find SI magnitude symbol for the given number*/
271 image_desc_t *im, /* image description */
278 char *symbol[] = {"a", /* 10e-18 Atto */
279 "f", /* 10e-15 Femto */
280 "p", /* 10e-12 Pico */
281 "n", /* 10e-9 Nano */
282 "u", /* 10e-6 Micro */
283 "m", /* 10e-3 Milli */
288 "T", /* 10e12 Tera */
289 "P", /* 10e15 Peta */
295 if (*value == 0.0 || isnan(*value) ) {
299 sindex = floor(log(fabs(*value))/log((double)im->base));
300 *magfact = pow((double)im->base, (double)sindex);
301 (*value) /= (*magfact);
303 if ( sindex <= symbcenter && sindex >= -symbcenter) {
304 (*symb_ptr) = symbol[sindex+symbcenter];
312 /* find SI magnitude symbol for the numbers on the y-axis*/
315 image_desc_t *im /* image description */
319 char symbol[] = {'a', /* 10e-18 Atto */
320 'f', /* 10e-15 Femto */
321 'p', /* 10e-12 Pico */
322 'n', /* 10e-9 Nano */
323 'u', /* 10e-6 Micro */
324 'm', /* 10e-3 Milli */
329 'T', /* 10e12 Tera */
330 'P', /* 10e15 Peta */
334 double digits,viewdigits=0;
336 digits = floor( log( max( fabs(im->minval),fabs(im->maxval)))/log((double)im->base));
338 if (im->unitsexponent != 9999) {
339 /* unitsexponent = 9, 6, 3, 0, -3, -6, -9, etc */
340 viewdigits = floor(im->unitsexponent / 3);
345 im->magfact = pow((double)im->base , digits);
348 printf("digits %6.3f im->magfact %6.3f\n",digits,im->magfact);
351 im->viewfactor = im->magfact / pow((double)im->base , viewdigits);
353 pow((double)im->base , viewdigits);
355 if ( ((viewdigits+symbcenter) < sizeof(symbol)) &&
356 ((viewdigits+symbcenter) >= 0) )
357 im->symbol = symbol[(int)viewdigits+symbcenter];
362 /* move min and max values around to become sensible */
365 expand_range(image_desc_t *im)
367 double sensiblevalues[] ={1000.0,900.0,800.0,750.0,700.0,
368 600.0,500.0,400.0,300.0,250.0,
369 200.0,125.0,100.0,90.0,80.0,
370 75.0,70.0,60.0,50.0,40.0,30.0,
371 25.0,20.0,10.0,9.0,8.0,
372 7.0,6.0,5.0,4.0,3.5,3.0,
373 2.5,2.0,1.8,1.5,1.2,1.0,
374 0.8,0.7,0.6,0.5,0.4,0.3,0.2,0.1,0.0,-1};
376 double scaled_min,scaled_max;
383 printf("Min: %6.2f Max: %6.2f MagFactor: %6.2f\n",
384 im->minval,im->maxval,im->magfact);
387 if (isnan(im->ygridstep)){
388 if(im->extra_flags & ALTAUTOSCALE) {
389 /* measure the amplitude of the function. Make sure that
390 graph boundaries are slightly higher then max/min vals
391 so we can see amplitude on the graph */
394 delt = im->maxval - im->minval;
396 fact = 2.0 * pow(10.0,
397 floor(log10(max(fabs(im->minval), fabs(im->maxval)))) - 2);
399 adj = (fact - delt) * 0.55;
401 printf("Min: %6.2f Max: %6.2f delt: %6.2f fact: %6.2f adj: %6.2f\n", im->minval, im->maxval, delt, fact, adj);
407 else if(im->extra_flags & ALTAUTOSCALE_MAX) {
408 /* measure the amplitude of the function. Make sure that
409 graph boundaries are slightly higher than max vals
410 so we can see amplitude on the graph */
411 adj = (im->maxval - im->minval) * 0.1;
415 scaled_min = im->minval / im->magfact;
416 scaled_max = im->maxval / im->magfact;
418 for (i=1; sensiblevalues[i] > 0; i++){
419 if (sensiblevalues[i-1]>=scaled_min &&
420 sensiblevalues[i]<=scaled_min)
421 im->minval = sensiblevalues[i]*(im->magfact);
423 if (-sensiblevalues[i-1]<=scaled_min &&
424 -sensiblevalues[i]>=scaled_min)
425 im->minval = -sensiblevalues[i-1]*(im->magfact);
427 if (sensiblevalues[i-1] >= scaled_max &&
428 sensiblevalues[i] <= scaled_max)
429 im->maxval = sensiblevalues[i-1]*(im->magfact);
431 if (-sensiblevalues[i-1]<=scaled_max &&
432 -sensiblevalues[i] >=scaled_max)
433 im->maxval = -sensiblevalues[i]*(im->magfact);
435 /* no sensiblevalues found. we switch to ALTYGRID mode */
436 if (sensiblevalues[i] == 0){
437 im->extra_flags |= ALTYGRID;
441 /* adjust min and max to the grid definition if there is one */
442 im->minval = (double)im->ylabfact * im->ygridstep *
443 floor(im->minval / ((double)im->ylabfact * im->ygridstep));
444 im->maxval = (double)im->ylabfact * im->ygridstep *
445 ceil(im->maxval /( (double)im->ylabfact * im->ygridstep));
449 fprintf(stderr,"SCALED Min: %6.2f Max: %6.2f Factor: %6.2f\n",
450 im->minval,im->maxval,im->magfact);
455 apply_gridfit(image_desc_t *im)
457 if (isnan(im->minval) || isnan(im->maxval))
460 if (im->logarithmic) {
461 double ya, yb, ypix, ypixfrac;
462 double log10_range = log10(im->maxval) - log10(im->minval);
463 ya = pow((double)10, floor(log10(im->minval)));
464 while (ya < im->minval)
467 return; /* don't have y=10^x gridline */
469 if (yb <= im->maxval) {
470 /* we have at least 2 y=10^x gridlines.
471 Make sure distance between them in pixels
472 are an integer by expanding im->maxval */
473 double y_pixel_delta = ytr(im, ya) - ytr(im, yb);
474 double factor = y_pixel_delta / floor(y_pixel_delta);
475 double new_log10_range = factor * log10_range;
476 double new_ymax_log10 = log10(im->minval) + new_log10_range;
477 im->maxval = pow(10, new_ymax_log10);
478 ytr(im, DNAN); /* reset precalc */
479 log10_range = log10(im->maxval) - log10(im->minval);
481 /* make sure first y=10^x gridline is located on
482 integer pixel position by moving scale slightly
483 downwards (sub-pixel movement) */
484 ypix = ytr(im, ya) + im->ysize; /* add im->ysize so it always is positive */
485 ypixfrac = ypix - floor(ypix);
486 if (ypixfrac > 0 && ypixfrac < 1) {
487 double yfrac = ypixfrac / im->ysize;
488 im->minval = pow(10, log10(im->minval) - yfrac * log10_range);
489 im->maxval = pow(10, log10(im->maxval) - yfrac * log10_range);
490 ytr(im, DNAN); /* reset precalc */
493 /* Make sure we have an integer pixel distance between
494 each minor gridline */
495 double ypos1 = ytr(im, im->minval);
496 double ypos2 = ytr(im, im->minval + im->ygrid_scale.gridstep);
497 double y_pixel_delta = ypos1 - ypos2;
498 double factor = y_pixel_delta / floor(y_pixel_delta);
499 double new_range = factor * (im->maxval - im->minval);
500 double gridstep = im->ygrid_scale.gridstep;
501 double minor_y, minor_y_px, minor_y_px_frac;
502 im->maxval = im->minval + new_range;
503 ytr(im, DNAN); /* reset precalc */
504 /* make sure first minor gridline is on integer pixel y coord */
505 minor_y = gridstep * floor(im->minval / gridstep);
506 while (minor_y < im->minval)
508 minor_y_px = ytr(im, minor_y) + im->ysize; /* ensure > 0 by adding ysize */
509 minor_y_px_frac = minor_y_px - floor(minor_y_px);
510 if (minor_y_px_frac > 0 && minor_y_px_frac < 1) {
511 double yfrac = minor_y_px_frac / im->ysize;
512 double range = im->maxval - im->minval;
513 im->minval = im->minval - yfrac * range;
514 im->maxval = im->maxval - yfrac * range;
515 ytr(im, DNAN); /* reset precalc */
517 calc_horizontal_grid(im); /* recalc with changed im->maxval */
521 /* reduce data reimplementation by Alex */
525 enum cf_en cf, /* which consolidation function ?*/
526 unsigned long cur_step, /* step the data currently is in */
527 time_t *start, /* start, end and step as requested ... */
528 time_t *end, /* ... by the application will be ... */
529 unsigned long *step, /* ... adjusted to represent reality */
530 unsigned long *ds_cnt, /* number of data sources in file */
531 rrd_value_t **data) /* two dimensional array containing the data */
533 int i,reduce_factor = ceil((double)(*step) / (double)cur_step);
534 unsigned long col,dst_row,row_cnt,start_offset,end_offset,skiprows=0;
535 rrd_value_t *srcptr,*dstptr;
537 (*step) = cur_step*reduce_factor; /* set new step size for reduced data */
540 row_cnt = ((*end)-(*start))/cur_step;
546 printf("Reducing %lu rows with factor %i time %lu to %lu, step %lu\n",
547 row_cnt,reduce_factor,*start,*end,cur_step);
548 for (col=0;col<row_cnt;col++) {
549 printf("time %10lu: ",*start+(col+1)*cur_step);
550 for (i=0;i<*ds_cnt;i++)
551 printf(" %8.2e",srcptr[*ds_cnt*col+i]);
556 /* We have to combine [reduce_factor] rows of the source
557 ** into one row for the destination. Doing this we also
558 ** need to take care to combine the correct rows. First
559 ** alter the start and end time so that they are multiples
560 ** of the new step time. We cannot reduce the amount of
561 ** time so we have to move the end towards the future and
562 ** the start towards the past.
564 end_offset = (*end) % (*step);
565 start_offset = (*start) % (*step);
567 /* If there is a start offset (which cannot be more than
568 ** one destination row), skip the appropriate number of
569 ** source rows and one destination row. The appropriate
570 ** number is what we do know (start_offset/cur_step) of
571 ** the new interval (*step/cur_step aka reduce_factor).
574 printf("start_offset: %lu end_offset: %lu\n",start_offset,end_offset);
575 printf("row_cnt before: %lu\n",row_cnt);
578 (*start) = (*start)-start_offset;
579 skiprows=reduce_factor-start_offset/cur_step;
580 srcptr+=skiprows* *ds_cnt;
581 for (col=0;col<(*ds_cnt);col++) *dstptr++ = DNAN;
585 printf("row_cnt between: %lu\n",row_cnt);
588 /* At the end we have some rows that are not going to be
589 ** used, the amount is end_offset/cur_step
592 (*end) = (*end)-end_offset+(*step);
593 skiprows = end_offset/cur_step;
597 printf("row_cnt after: %lu\n",row_cnt);
600 /* Sanity check: row_cnt should be multiple of reduce_factor */
601 /* if this gets triggered, something is REALLY WRONG ... we die immediately */
603 if (row_cnt%reduce_factor) {
604 printf("SANITY CHECK: %lu rows cannot be reduced by %i \n",
605 row_cnt,reduce_factor);
606 printf("BUG in reduce_data()\n");
610 /* Now combine reduce_factor intervals at a time
611 ** into one interval for the destination.
614 for (dst_row=0;(long int)row_cnt>=reduce_factor;dst_row++) {
615 for (col=0;col<(*ds_cnt);col++) {
616 rrd_value_t newval=DNAN;
617 unsigned long validval=0;
619 for (i=0;i<reduce_factor;i++) {
620 if (isnan(srcptr[i*(*ds_cnt)+col])) {
624 if (isnan(newval)) newval = srcptr[i*(*ds_cnt)+col];
632 newval += srcptr[i*(*ds_cnt)+col];
635 newval = min (newval,srcptr[i*(*ds_cnt)+col]);
638 /* an interval contains a failure if any subintervals contained a failure */
640 newval = max (newval,srcptr[i*(*ds_cnt)+col]);
643 newval = srcptr[i*(*ds_cnt)+col];
648 if (validval == 0){newval = DNAN;} else{
666 srcptr+=(*ds_cnt)*reduce_factor;
667 row_cnt-=reduce_factor;
669 /* If we had to alter the endtime, we didn't have enough
670 ** source rows to fill the last row. Fill it with NaN.
672 if (end_offset) for (col=0;col<(*ds_cnt);col++) *dstptr++ = DNAN;
674 row_cnt = ((*end)-(*start))/ *step;
676 printf("Done reducing. Currently %lu rows, time %lu to %lu, step %lu\n",
677 row_cnt,*start,*end,*step);
678 for (col=0;col<row_cnt;col++) {
679 printf("time %10lu: ",*start+(col+1)*(*step));
680 for (i=0;i<*ds_cnt;i++)
681 printf(" %8.2e",srcptr[*ds_cnt*col+i]);
688 /* get the data required for the graphs from the
692 data_fetch(image_desc_t *im )
697 /* pull the data from the log files ... */
698 for (i=0;i< (int)im->gdes_c;i++){
699 /* only GF_DEF elements fetch data */
700 if (im->gdes[i].gf != GF_DEF)
704 /* do we have it already ?*/
705 for (ii=0;ii<i;ii++) {
706 if (im->gdes[ii].gf != GF_DEF)
708 if ((strcmp(im->gdes[i].rrd, im->gdes[ii].rrd) == 0)
709 && (im->gdes[i].cf == im->gdes[ii].cf)
710 && (im->gdes[i].cf_reduce == im->gdes[ii].cf_reduce)
711 && (im->gdes[i].start == im->gdes[ii].start)
712 && (im->gdes[i].end == im->gdes[ii].end)
713 && (im->gdes[i].step == im->gdes[ii].step)) {
714 /* OK, the data is already there.
715 ** Just copy the header portion
717 im->gdes[i].start = im->gdes[ii].start;
718 im->gdes[i].end = im->gdes[ii].end;
719 im->gdes[i].step = im->gdes[ii].step;
720 im->gdes[i].ds_cnt = im->gdes[ii].ds_cnt;
721 im->gdes[i].ds_namv = im->gdes[ii].ds_namv;
722 im->gdes[i].data = im->gdes[ii].data;
723 im->gdes[i].data_first = 0;
730 unsigned long ft_step = im->gdes[i].step ;
732 if((rrd_fetch_fn(im->gdes[i].rrd,
738 &im->gdes[i].ds_namv,
739 &im->gdes[i].data)) == -1){
742 im->gdes[i].data_first = 1;
743 im->gdes[i].step = im->step;
745 if (ft_step < im->gdes[i].step) {
746 reduce_data(im->gdes[i].cf_reduce,
754 im->gdes[i].step = ft_step;
758 /* lets see if the required data source is really there */
759 for(ii=0;ii<(int)im->gdes[i].ds_cnt;ii++){
760 if(strcmp(im->gdes[i].ds_namv[ii],im->gdes[i].ds_nam) == 0){
763 if (im->gdes[i].ds== -1){
764 rrd_set_error("No DS called '%s' in '%s'",
765 im->gdes[i].ds_nam,im->gdes[i].rrd);
773 /* evaluate the expressions in the CDEF functions */
775 /*************************************************************
777 *************************************************************/
780 find_var_wrapper(void *arg1, char *key)
782 return find_var((image_desc_t *) arg1, key);
785 /* find gdes containing var*/
787 find_var(image_desc_t *im, char *key){
789 for(ii=0;ii<im->gdes_c-1;ii++){
790 if((im->gdes[ii].gf == GF_DEF
791 || im->gdes[ii].gf == GF_VDEF
792 || im->gdes[ii].gf == GF_CDEF)
793 && (strcmp(im->gdes[ii].vname,key) == 0)){
800 /* find the largest common denominator for all the numbers
801 in the 0 terminated num array */
806 for (i=0;num[i+1]!=0;i++){
808 rest=num[i] % num[i+1];
809 num[i]=num[i+1]; num[i+1]=rest;
813 /* return i==0?num[i]:num[i-1]; */
817 /* run the rpn calculator on all the VDEF and CDEF arguments */
819 data_calc( image_desc_t *im){
823 long *steparray, rpi;
828 rpnstack_init(&rpnstack);
830 for (gdi=0;gdi<im->gdes_c;gdi++){
831 /* Look for GF_VDEF and GF_CDEF in the same loop,
832 * so CDEFs can use VDEFs and vice versa
834 switch (im->gdes[gdi].gf) {
838 graph_desc_t *vdp = &im->gdes[im->gdes[gdi].vidx];
840 /* remove current shift */
841 vdp->start -= vdp->shift;
842 vdp->end -= vdp->shift;
845 if (im->gdes[gdi].shidx >= 0)
846 vdp->shift = im->gdes[im->gdes[gdi].shidx].vf.val;
849 vdp->shift = im->gdes[gdi].shval;
851 /* normalize shift to multiple of consolidated step */
852 vdp->shift = (vdp->shift / (long)vdp->step) * (long)vdp->step;
855 vdp->start += vdp->shift;
856 vdp->end += vdp->shift;
860 /* A VDEF has no DS. This also signals other parts
861 * of rrdtool that this is a VDEF value, not a CDEF.
863 im->gdes[gdi].ds_cnt = 0;
864 if (vdef_calc(im,gdi)) {
865 rrd_set_error("Error processing VDEF '%s'"
868 rpnstack_free(&rpnstack);
873 im->gdes[gdi].ds_cnt = 1;
874 im->gdes[gdi].ds = 0;
875 im->gdes[gdi].data_first = 1;
876 im->gdes[gdi].start = 0;
877 im->gdes[gdi].end = 0;
882 /* Find the variables in the expression.
883 * - VDEF variables are substituted by their values
884 * and the opcode is changed into OP_NUMBER.
885 * - CDEF variables are analized for their step size,
886 * the lowest common denominator of all the step
887 * sizes of the data sources involved is calculated
888 * and the resulting number is the step size for the
889 * resulting data source.
891 for(rpi=0;im->gdes[gdi].rpnp[rpi].op != OP_END;rpi++){
892 if(im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
893 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER){
894 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
895 if (im->gdes[ptr].ds_cnt == 0) { /* this is a VDEF data source */
897 printf("DEBUG: inside CDEF '%s' processing VDEF '%s'\n",
899 im->gdes[ptr].vname);
900 printf("DEBUG: value from vdef is %f\n",im->gdes[ptr].vf.val);
902 im->gdes[gdi].rpnp[rpi].val = im->gdes[ptr].vf.val;
903 im->gdes[gdi].rpnp[rpi].op = OP_NUMBER;
904 } else { /* normal variables and PREF(variables) */
906 /* add one entry to the array that keeps track of the step sizes of the
907 * data sources going into the CDEF. */
909 rrd_realloc(steparray,
910 (++stepcnt+1)*sizeof(*steparray)))==NULL){
911 rrd_set_error("realloc steparray");
912 rpnstack_free(&rpnstack);
916 steparray[stepcnt-1] = im->gdes[ptr].step;
918 /* adjust start and end of cdef (gdi) so
919 * that it runs from the latest start point
920 * to the earliest endpoint of any of the
921 * rras involved (ptr)
924 if(im->gdes[gdi].start < im->gdes[ptr].start)
925 im->gdes[gdi].start = im->gdes[ptr].start;
927 if(im->gdes[gdi].end == 0 ||
928 im->gdes[gdi].end > im->gdes[ptr].end)
929 im->gdes[gdi].end = im->gdes[ptr].end;
931 /* store pointer to the first element of
932 * the rra providing data for variable,
933 * further save step size and data source
936 im->gdes[gdi].rpnp[rpi].data = im->gdes[ptr].data + im->gdes[ptr].ds;
937 im->gdes[gdi].rpnp[rpi].step = im->gdes[ptr].step;
938 im->gdes[gdi].rpnp[rpi].ds_cnt = im->gdes[ptr].ds_cnt;
940 /* backoff the *.data ptr; this is done so
941 * rpncalc() function doesn't have to treat
942 * the first case differently
944 } /* if ds_cnt != 0 */
945 } /* if OP_VARIABLE */
946 } /* loop through all rpi */
948 /* move the data pointers to the correct period */
949 for(rpi=0;im->gdes[gdi].rpnp[rpi].op != OP_END;rpi++){
950 if(im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
951 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER){
952 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
953 long diff = im->gdes[gdi].start - im->gdes[ptr].start;
956 im->gdes[gdi].rpnp[rpi].data += (diff / im->gdes[ptr].step) * im->gdes[ptr].ds_cnt;
960 if(steparray == NULL){
961 rrd_set_error("rpn expressions without DEF"
962 " or CDEF variables are not supported");
963 rpnstack_free(&rpnstack);
966 steparray[stepcnt]=0;
967 /* Now find the resulting step. All steps in all
968 * used RRAs have to be visited
970 im->gdes[gdi].step = lcd(steparray);
972 if((im->gdes[gdi].data = malloc((
973 (im->gdes[gdi].end-im->gdes[gdi].start)
974 / im->gdes[gdi].step)
975 * sizeof(double)))==NULL){
976 rrd_set_error("malloc im->gdes[gdi].data");
977 rpnstack_free(&rpnstack);
981 /* Step through the new cdef results array and
982 * calculate the values
984 for (now = im->gdes[gdi].start + im->gdes[gdi].step;
985 now<=im->gdes[gdi].end;
986 now += im->gdes[gdi].step)
988 rpnp_t *rpnp = im -> gdes[gdi].rpnp;
990 /* 3rd arg of rpn_calc is for OP_VARIABLE lookups;
991 * in this case we are advancing by timesteps;
992 * we use the fact that time_t is a synonym for long
994 if (rpn_calc(rpnp,&rpnstack,(long) now,
995 im->gdes[gdi].data,++dataidx) == -1) {
996 /* rpn_calc sets the error string */
997 rpnstack_free(&rpnstack);
1000 } /* enumerate over time steps within a CDEF */
1005 } /* enumerate over CDEFs */
1006 rpnstack_free(&rpnstack);
1010 /* massage data so, that we get one value for each x coordinate in the graph */
1012 data_proc( image_desc_t *im ){
1014 double pixstep = (double)(im->end-im->start)
1015 /(double)im->xsize; /* how much time
1016 passes in one pixel */
1018 double minval=DNAN,maxval=DNAN;
1020 unsigned long gr_time;
1022 /* memory for the processed data */
1023 for(i=0;i<im->gdes_c;i++) {
1024 if((im->gdes[i].gf==GF_LINE) ||
1025 (im->gdes[i].gf==GF_AREA) ||
1026 (im->gdes[i].gf==GF_TICK) ||
1027 (im->gdes[i].gf==GF_STACK)) {
1028 if((im->gdes[i].p_data = malloc((im->xsize +1)
1029 * sizeof(rrd_value_t)))==NULL){
1030 rrd_set_error("malloc data_proc");
1036 for (i=0;i<im->xsize;i++) { /* for each pixel */
1038 gr_time = im->start+pixstep*i; /* time of the current step */
1041 for (ii=0;ii<im->gdes_c;ii++) {
1043 switch (im->gdes[ii].gf) {
1047 if (!im->gdes[ii].stack)
1050 value = im->gdes[ii].yrule;
1051 if (isnan(value) || (im->gdes[ii].gf == GF_TICK)) {
1052 /* The time of the data doesn't necessarily match
1053 ** the time of the graph. Beware.
1055 vidx = im->gdes[ii].vidx;
1056 if (im->gdes[vidx].gf == GF_VDEF) {
1057 value = im->gdes[vidx].vf.val;
1058 } else if (((long int)gr_time >= (long int)im->gdes[vidx].start) &&
1059 ((long int)gr_time <= (long int)im->gdes[vidx].end) ) {
1060 value = im->gdes[vidx].data[
1061 (unsigned long) floor(
1062 (double)(gr_time - im->gdes[vidx].start)
1063 / im->gdes[vidx].step)
1064 * im->gdes[vidx].ds_cnt
1072 if (! isnan(value)) {
1074 im->gdes[ii].p_data[i] = paintval;
1075 /* GF_TICK: the data values are not
1076 ** relevant for min and max
1078 if (finite(paintval) && im->gdes[ii].gf != GF_TICK ) {
1079 if (isnan(minval) || paintval < minval)
1081 if (isnan(maxval) || paintval > maxval)
1085 im->gdes[ii].p_data[i] = DNAN;
1094 /* if min or max have not been asigned a value this is because
1095 there was no data in the graph ... this is not good ...
1096 lets set these to dummy values then ... */
1098 if (isnan(minval)) minval = 0.0;
1099 if (isnan(maxval)) maxval = 1.0;
1101 /* adjust min and max values */
1102 if (isnan(im->minval)
1103 /* don't adjust low-end with log scale */
1104 || ((!im->logarithmic && !im->rigid) && im->minval > minval)
1106 im->minval = minval;
1107 if (isnan(im->maxval)
1108 || (!im->rigid && im->maxval < maxval)
1110 if (im->logarithmic)
1111 im->maxval = maxval * 1.1;
1113 im->maxval = maxval;
1115 /* make sure min is smaller than max */
1116 if (im->minval > im->maxval) {
1117 im->minval = 0.99 * im->maxval;
1120 /* make sure min and max are not equal */
1121 if (im->minval == im->maxval) {
1123 if (! im->logarithmic) {
1126 /* make sure min and max are not both zero */
1127 if (im->maxval == 0.0) {
1136 /* identify the point where the first gridline, label ... gets placed */
1140 time_t start, /* what is the initial time */
1141 enum tmt_en baseint, /* what is the basic interval */
1142 long basestep /* how many if these do we jump a time */
1146 localtime_r(&start, &tm);
1149 tm.tm_sec -= tm.tm_sec % basestep; break;
1152 tm.tm_min -= tm.tm_min % basestep;
1157 tm.tm_hour -= tm.tm_hour % basestep; break;
1159 /* we do NOT look at the basestep for this ... */
1162 tm.tm_hour = 0; break;
1164 /* we do NOT look at the basestep for this ... */
1168 tm.tm_mday -= tm.tm_wday -1; /* -1 because we want the monday */
1169 if (tm.tm_wday==0) tm.tm_mday -= 7; /* we want the *previous* monday */
1176 tm.tm_mon -= tm.tm_mon % basestep; break;
1184 tm.tm_year -= (tm.tm_year+1900) % basestep;
1189 /* identify the point where the next gridline, label ... gets placed */
1192 time_t current, /* what is the initial time */
1193 enum tmt_en baseint, /* what is the basic interval */
1194 long basestep /* how many if these do we jump a time */
1199 localtime_r(¤t, &tm);
1203 tm.tm_sec += basestep; break;
1205 tm.tm_min += basestep; break;
1207 tm.tm_hour += basestep; break;
1209 tm.tm_mday += basestep; break;
1211 tm.tm_mday += 7*basestep; break;
1213 tm.tm_mon += basestep; break;
1215 tm.tm_year += basestep;
1217 madetime = mktime(&tm);
1218 } while (madetime == -1); /* this is necessary to skip impssible times
1219 like the daylight saving time skips */
1225 /* calculate values required for PRINT and GPRINT functions */
1228 print_calc(image_desc_t *im, char ***prdata)
1230 long i,ii,validsteps;
1233 int graphelement = 0;
1236 double magfact = -1;
1240 if (im->imginfo) prlines++;
1241 for(i=0;i<im->gdes_c;i++){
1242 switch(im->gdes[i].gf){
1245 if(((*prdata) = rrd_realloc((*prdata),prlines*sizeof(char *)))==NULL){
1246 rrd_set_error("realloc prdata");
1250 /* PRINT and GPRINT can now print VDEF generated values.
1251 * There's no need to do any calculations on them as these
1252 * calculations were already made.
1254 vidx = im->gdes[i].vidx;
1255 if (im->gdes[vidx].gf==GF_VDEF) { /* simply use vals */
1256 printval = im->gdes[vidx].vf.val;
1257 printtime = im->gdes[vidx].vf.when;
1258 } else { /* need to calculate max,min,avg etcetera */
1259 max_ii =((im->gdes[vidx].end
1260 - im->gdes[vidx].start)
1261 / im->gdes[vidx].step
1262 * im->gdes[vidx].ds_cnt);
1265 for( ii=im->gdes[vidx].ds;
1267 ii+=im->gdes[vidx].ds_cnt){
1268 if (! finite(im->gdes[vidx].data[ii]))
1270 if (isnan(printval)){
1271 printval = im->gdes[vidx].data[ii];
1276 switch (im->gdes[i].cf){
1279 case CF_DEVSEASONAL:
1283 printval += im->gdes[vidx].data[ii];
1286 printval = min( printval, im->gdes[vidx].data[ii]);
1290 printval = max( printval, im->gdes[vidx].data[ii]);
1293 printval = im->gdes[vidx].data[ii];
1296 if (im->gdes[i].cf==CF_AVERAGE || im->gdes[i].cf > CF_LAST) {
1297 if (validsteps > 1) {
1298 printval = (printval / validsteps);
1301 } /* prepare printval */
1303 if (!strcmp(im->gdes[i].format,"%c")) { /* VDEF time print */
1304 char ctime_buf[128]; /* PS: for ctime_r, must be >= 26 chars */
1306 ctime_r(&printtime,ctime_buf);
1307 while(isprint(ctime_buf[iii])){iii++;}
1308 ctime_buf[iii]='\0';
1309 if (im->gdes[i].gf == GF_PRINT){
1310 (*prdata)[prlines-2] = malloc((FMT_LEG_LEN+2)*sizeof(char));
1311 sprintf((*prdata)[prlines-2],"%s (%lu)",ctime_buf,printtime);
1312 (*prdata)[prlines-1] = NULL;
1314 sprintf(im->gdes[i].legend,"%s (%lu)",ctime_buf,printtime);
1318 if ((percent_s = strstr(im->gdes[i].format,"%S")) != NULL) {
1319 /* Magfact is set to -1 upon entry to print_calc. If it
1320 * is still less than 0, then we need to run auto_scale.
1321 * Otherwise, put the value into the correct units. If
1322 * the value is 0, then do not set the symbol or magnification
1323 * so next the calculation will be performed again. */
1324 if (magfact < 0.0) {
1325 auto_scale(im,&printval,&si_symb,&magfact);
1326 if (printval == 0.0)
1329 printval /= magfact;
1331 *(++percent_s) = 's';
1332 } else if (strstr(im->gdes[i].format,"%s") != NULL) {
1333 auto_scale(im,&printval,&si_symb,&magfact);
1336 if (im->gdes[i].gf == GF_PRINT){
1337 (*prdata)[prlines-2] = malloc((FMT_LEG_LEN+2)*sizeof(char));
1338 (*prdata)[prlines-1] = NULL;
1339 if (bad_format(im->gdes[i].format)) {
1340 rrd_set_error("bad format for PRINT in '%s'", im->gdes[i].format);
1343 #ifdef HAVE_SNPRINTF
1344 snprintf((*prdata)[prlines-2],FMT_LEG_LEN,im->gdes[i].format,printval,si_symb);
1346 sprintf((*prdata)[prlines-2],im->gdes[i].format,printval,si_symb);
1351 if (bad_format(im->gdes[i].format)) {
1352 rrd_set_error("bad format for GPRINT in '%s'", im->gdes[i].format);
1355 #ifdef HAVE_SNPRINTF
1356 snprintf(im->gdes[i].legend,FMT_LEG_LEN-2,im->gdes[i].format,printval,si_symb);
1358 sprintf(im->gdes[i].legend,im->gdes[i].format,printval,si_symb);
1376 #ifdef WITH_PIECHART
1384 return graphelement;
1388 /* place legends with color spots */
1390 leg_place(image_desc_t *im)
1393 int interleg = im->text_prop[TEXT_PROP_LEGEND].size*2.0;
1394 int border = im->text_prop[TEXT_PROP_LEGEND].size*2.0;
1395 int fill=0, fill_last;
1397 int leg_x = border, leg_y = im->yimg;
1401 char prt_fctn; /*special printfunctions */
1404 if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
1405 if ((legspace = malloc(im->gdes_c*sizeof(int)))==NULL){
1406 rrd_set_error("malloc for legspace");
1410 for(i=0;i<im->gdes_c;i++){
1413 /* hid legends for rules which are not displayed */
1415 if(!(im->extra_flags & FORCE_RULES_LEGEND)) {
1416 if (im->gdes[i].gf == GF_HRULE &&
1417 (im->gdes[i].yrule < im->minval || im->gdes[i].yrule > im->maxval))
1418 im->gdes[i].legend[0] = '\0';
1420 if (im->gdes[i].gf == GF_VRULE &&
1421 (im->gdes[i].xrule < im->start || im->gdes[i].xrule > im->end))
1422 im->gdes[i].legend[0] = '\0';
1425 leg_cc = strlen(im->gdes[i].legend);
1427 /* is there a controle code ant the end of the legend string ? */
1428 /* and it is not a tab \\t */
1429 if (leg_cc >= 2 && im->gdes[i].legend[leg_cc-2] == '\\' && im->gdes[i].legend[leg_cc-1] != 't') {
1430 prt_fctn = im->gdes[i].legend[leg_cc-1];
1432 im->gdes[i].legend[leg_cc] = '\0';
1436 /* remove exess space */
1437 while (prt_fctn=='g' &&
1439 im->gdes[i].legend[leg_cc-1]==' '){
1441 im->gdes[i].legend[leg_cc]='\0';
1444 legspace[i]=(prt_fctn=='g' ? 0 : interleg);
1447 /* no interleg space if string ends in \g */
1448 fill += legspace[i];
1450 fill += gfx_get_text_width(im->canvas, fill+border,
1451 im->text_prop[TEXT_PROP_LEGEND].font,
1452 im->text_prop[TEXT_PROP_LEGEND].size,
1454 im->gdes[i].legend, 0);
1459 /* who said there was a special tag ... ?*/
1460 if (prt_fctn=='g') {
1463 if (prt_fctn == '\0') {
1464 if (i == im->gdes_c -1 ) prt_fctn ='l';
1466 /* is it time to place the legends ? */
1467 if (fill > im->ximg - 2*border){
1482 if (prt_fctn != '\0'){
1484 if (leg_c >= 2 && prt_fctn == 'j') {
1485 glue = (im->ximg - fill - 2* border) / (leg_c-1);
1489 if (prt_fctn =='c') leg_x = (im->ximg - fill) / 2.0;
1490 if (prt_fctn =='r') leg_x = im->ximg - fill - border;
1492 for(ii=mark;ii<=i;ii++){
1493 if(im->gdes[ii].legend[0]=='\0')
1494 continue; /* skip empty legends */
1495 im->gdes[ii].leg_x = leg_x;
1496 im->gdes[ii].leg_y = leg_y;
1498 gfx_get_text_width(im->canvas, leg_x,
1499 im->text_prop[TEXT_PROP_LEGEND].font,
1500 im->text_prop[TEXT_PROP_LEGEND].size,
1502 im->gdes[ii].legend, 0)
1506 leg_y += im->text_prop[TEXT_PROP_LEGEND].size*1.8;
1507 if (prt_fctn == 's') leg_y -= im->text_prop[TEXT_PROP_LEGEND].size;
1519 /* create a grid on the graph. it determines what to do
1520 from the values of xsize, start and end */
1522 /* the xaxis labels are determined from the number of seconds per pixel
1523 in the requested graph */
1528 calc_horizontal_grid(image_desc_t *im)
1534 int decimals, fractionals;
1536 im->ygrid_scale.labfact=2;
1538 range = im->maxval - im->minval;
1539 scaledrange = range / im->magfact;
1541 /* does the scale of this graph make it impossible to put lines
1542 on it? If so, give up. */
1543 if (isnan(scaledrange)) {
1547 /* find grid spaceing */
1549 if(isnan(im->ygridstep)){
1550 if(im->extra_flags & ALTYGRID) {
1551 /* find the value with max number of digits. Get number of digits */
1552 decimals = ceil(log10(max(fabs(im->maxval), fabs(im->minval))));
1553 if(decimals <= 0) /* everything is small. make place for zero */
1556 fractionals = floor(log10(range));
1557 if(fractionals < 0) { /* small amplitude. */
1558 int len = decimals - fractionals + 1;
1559 if (im->unitslength < len) im->unitslength = len;
1560 sprintf(im->ygrid_scale.labfmt, "%%%d.%df", len, -fractionals + 1);
1562 int len = decimals + 1;
1563 if (im->unitslength < len) im->unitslength = len;
1564 sprintf(im->ygrid_scale.labfmt, "%%%d.1f", len);
1566 im->ygrid_scale.gridstep = pow((double)10, (double)fractionals);
1567 if(im->ygrid_scale.gridstep == 0) /* range is one -> 0.1 is reasonable scale */
1568 im->ygrid_scale.gridstep = 0.1;
1569 /* should have at least 5 lines but no more then 15 */
1570 if(range/im->ygrid_scale.gridstep < 5)
1571 im->ygrid_scale.gridstep /= 10;
1572 if(range/im->ygrid_scale.gridstep > 15)
1573 im->ygrid_scale.gridstep *= 10;
1574 if(range/im->ygrid_scale.gridstep > 5) {
1575 im->ygrid_scale.labfact = 1;
1576 if(range/im->ygrid_scale.gridstep > 8)
1577 im->ygrid_scale.labfact = 2;
1580 im->ygrid_scale.gridstep /= 5;
1581 im->ygrid_scale.labfact = 5;
1585 for(i=0;ylab[i].grid > 0;i++){
1586 pixel = im->ysize / (scaledrange / ylab[i].grid);
1594 if (pixel * ylab[gridind].lfac[i] >= 2.5 * im->text_prop[TEXT_PROP_AXIS].size) {
1595 im->ygrid_scale.labfact = ylab[gridind].lfac[i];
1600 im->ygrid_scale.gridstep = ylab[gridind].grid * im->magfact;
1603 im->ygrid_scale.gridstep = im->ygridstep;
1604 im->ygrid_scale.labfact = im->ylabfact;
1609 int draw_horizontal_grid(image_desc_t *im)
1613 char graph_label[100];
1614 double X0=im->xorigin;
1615 double X1=im->xorigin+im->xsize;
1617 int sgrid = (int)( im->minval / im->ygrid_scale.gridstep - 1);
1618 int egrid = (int)( im->maxval / im->ygrid_scale.gridstep + 1);
1620 scaledstep = im->ygrid_scale.gridstep/im->magfact;
1621 MaxY = scaledstep*(double)im->viewfactor*(double)egrid;
1622 for (i = sgrid; i <= egrid; i++){
1623 double Y0=ytr(im,im->ygrid_scale.gridstep*i);
1624 if ( Y0 >= im->yorigin-im->ysize
1625 && Y0 <= im->yorigin){
1626 if(i % im->ygrid_scale.labfact == 0){
1627 if (i==0 || im->symbol == ' ') {
1629 if(im->extra_flags & ALTYGRID) {
1630 sprintf(graph_label,im->ygrid_scale.labfmt,scaledstep*im->viewfactor*i);
1633 sprintf(graph_label,"%4.1f",scaledstep*im->viewfactor*i);
1636 sprintf(graph_label,"%4.0f",scaledstep*im->viewfactor*i);
1640 sprintf(graph_label,"%4.1f %c",scaledstep*im->viewfactor*i, im->symbol);
1642 sprintf(graph_label,"%4.0f %c",scaledstep*im->viewfactor*i, im->symbol);
1646 gfx_new_text ( im->canvas,
1647 X0-im->text_prop[TEXT_PROP_AXIS].size, Y0,
1648 im->graph_col[GRC_FONT],
1649 im->text_prop[TEXT_PROP_AXIS].font,
1650 im->text_prop[TEXT_PROP_AXIS].size,
1651 im->tabwidth, 0.0, GFX_H_RIGHT, GFX_V_CENTER,
1653 gfx_new_dashed_line ( im->canvas,
1656 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1657 im->grid_dash_on, im->grid_dash_off);
1659 } else if (!(im->extra_flags & NOMINOR)) {
1660 gfx_new_dashed_line ( im->canvas,
1663 GRIDWIDTH, im->graph_col[GRC_GRID],
1664 im->grid_dash_on, im->grid_dash_off);
1672 /* logaritmic horizontal grid */
1674 horizontal_log_grid(image_desc_t *im)
1678 int minoridx=0, majoridx=0;
1679 char graph_label[100];
1681 double value, pixperstep, minstep;
1683 /* find grid spaceing */
1684 pixpex= (double)im->ysize / (log10(im->maxval) - log10(im->minval));
1686 if (isnan(pixpex)) {
1690 for(i=0;yloglab[i][0] > 0;i++){
1691 minstep = log10(yloglab[i][0]);
1692 for(ii=1;yloglab[i][ii+1] > 0;ii++){
1693 if(yloglab[i][ii+2]==0){
1694 minstep = log10(yloglab[i][ii+1])-log10(yloglab[i][ii]);
1698 pixperstep = pixpex * minstep;
1699 if(pixperstep > 5){minoridx = i;}
1700 if(pixperstep > 2 * im->text_prop[TEXT_PROP_LEGEND].size){majoridx = i;}
1704 X1=im->xorigin+im->xsize;
1705 /* paint minor grid */
1706 for (value = pow((double)10, log10(im->minval)
1707 - fmod(log10(im->minval),log10(yloglab[minoridx][0])));
1708 value <= im->maxval;
1709 value *= yloglab[minoridx][0]){
1710 if (value < im->minval) continue;
1712 while(yloglab[minoridx][++i] > 0){
1713 Y0 = ytr(im,value * yloglab[minoridx][i]);
1714 if (Y0 <= im->yorigin - im->ysize) break;
1715 gfx_new_dashed_line ( im->canvas,
1718 GRIDWIDTH, im->graph_col[GRC_GRID],
1719 im->grid_dash_on, im->grid_dash_off);
1723 /* paint major grid and labels*/
1724 for (value = pow((double)10, log10(im->minval)
1725 - fmod(log10(im->minval),log10(yloglab[majoridx][0])));
1726 value <= im->maxval;
1727 value *= yloglab[majoridx][0]){
1728 if (value < im->minval) continue;
1730 while(yloglab[majoridx][++i] > 0){
1731 Y0 = ytr(im,value * yloglab[majoridx][i]);
1732 if (Y0 <= im->yorigin - im->ysize) break;
1733 gfx_new_dashed_line ( im->canvas,
1736 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1737 im->grid_dash_on, im->grid_dash_off);
1739 sprintf(graph_label,"%3.0e",value * yloglab[majoridx][i]);
1740 gfx_new_text ( im->canvas,
1741 X0-im->text_prop[TEXT_PROP_AXIS].size, Y0,
1742 im->graph_col[GRC_FONT],
1743 im->text_prop[TEXT_PROP_AXIS].font,
1744 im->text_prop[TEXT_PROP_AXIS].size,
1745 im->tabwidth,0.0, GFX_H_RIGHT, GFX_V_CENTER,
1757 int xlab_sel; /* which sort of label and grid ? */
1758 time_t ti, tilab, timajor;
1760 char graph_label[100];
1761 double X0,Y0,Y1; /* points for filled graph and more*/
1764 /* the type of time grid is determined by finding
1765 the number of seconds per pixel in the graph */
1768 if(im->xlab_user.minsec == -1){
1769 factor=(im->end - im->start)/im->xsize;
1771 while ( xlab[xlab_sel+1].minsec != -1
1772 && xlab[xlab_sel+1].minsec <= factor){ xlab_sel++; }
1773 im->xlab_user.gridtm = xlab[xlab_sel].gridtm;
1774 im->xlab_user.gridst = xlab[xlab_sel].gridst;
1775 im->xlab_user.mgridtm = xlab[xlab_sel].mgridtm;
1776 im->xlab_user.mgridst = xlab[xlab_sel].mgridst;
1777 im->xlab_user.labtm = xlab[xlab_sel].labtm;
1778 im->xlab_user.labst = xlab[xlab_sel].labst;
1779 im->xlab_user.precis = xlab[xlab_sel].precis;
1780 im->xlab_user.stst = xlab[xlab_sel].stst;
1783 /* y coords are the same for every line ... */
1785 Y1 = im->yorigin-im->ysize;
1788 /* paint the minor grid */
1789 if (!(im->extra_flags & NOMINOR))
1791 for(ti = find_first_time(im->start,
1792 im->xlab_user.gridtm,
1793 im->xlab_user.gridst),
1794 timajor = find_first_time(im->start,
1795 im->xlab_user.mgridtm,
1796 im->xlab_user.mgridst);
1798 ti = find_next_time(ti,im->xlab_user.gridtm,im->xlab_user.gridst)
1800 /* are we inside the graph ? */
1801 if (ti < im->start || ti > im->end) continue;
1802 while (timajor < ti) {
1803 timajor = find_next_time(timajor,
1804 im->xlab_user.mgridtm, im->xlab_user.mgridst);
1806 if (ti == timajor) continue; /* skip as falls on major grid line */
1808 gfx_new_dashed_line(im->canvas,X0,Y0+1, X0,Y1-1,GRIDWIDTH,
1809 im->graph_col[GRC_GRID],
1810 im->grid_dash_on, im->grid_dash_off);
1815 /* paint the major grid */
1816 for(ti = find_first_time(im->start,
1817 im->xlab_user.mgridtm,
1818 im->xlab_user.mgridst);
1820 ti = find_next_time(ti,im->xlab_user.mgridtm,im->xlab_user.mgridst)
1822 /* are we inside the graph ? */
1823 if (ti < im->start || ti > im->end) continue;
1825 gfx_new_dashed_line(im->canvas,X0,Y0+3, X0,Y1-2,MGRIDWIDTH,
1826 im->graph_col[GRC_MGRID],
1827 im->grid_dash_on, im->grid_dash_off);
1830 /* paint the labels below the graph */
1831 for(ti = find_first_time(im->start - im->xlab_user.precis/2,
1832 im->xlab_user.labtm,
1833 im->xlab_user.labst);
1834 ti <= im->end - im->xlab_user.precis/2;
1835 ti = find_next_time(ti,im->xlab_user.labtm,im->xlab_user.labst)
1837 tilab= ti + im->xlab_user.precis/2; /* correct time for the label */
1838 /* are we inside the graph ? */
1839 if (tilab < im->start || tilab > im->end) continue;
1842 localtime_r(&tilab, &tm);
1843 strftime(graph_label,99,im->xlab_user.stst, &tm);
1845 # error "your libc has no strftime I guess we'll abort the exercise here."
1847 gfx_new_text ( im->canvas,
1848 xtr(im,tilab), Y0+im->text_prop[TEXT_PROP_AXIS].size,
1849 im->graph_col[GRC_FONT],
1850 im->text_prop[TEXT_PROP_AXIS].font,
1851 im->text_prop[TEXT_PROP_AXIS].size,
1852 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_TOP,
1865 /* draw x and y axis */
1866 /* gfx_new_line ( im->canvas, im->xorigin+im->xsize,im->yorigin,
1867 im->xorigin+im->xsize,im->yorigin-im->ysize,
1868 GRIDWIDTH, im->graph_col[GRC_AXIS]);
1870 gfx_new_line ( im->canvas, im->xorigin,im->yorigin-im->ysize,
1871 im->xorigin+im->xsize,im->yorigin-im->ysize,
1872 GRIDWIDTH, im->graph_col[GRC_AXIS]); */
1874 gfx_new_line ( im->canvas, im->xorigin-4,im->yorigin,
1875 im->xorigin+im->xsize+4,im->yorigin,
1876 MGRIDWIDTH, im->graph_col[GRC_AXIS]);
1878 gfx_new_line ( im->canvas, im->xorigin,im->yorigin+4,
1879 im->xorigin,im->yorigin-im->ysize-4,
1880 MGRIDWIDTH, im->graph_col[GRC_AXIS]);
1883 /* arrow for X and Y axis direction */
1884 gfx_new_area ( im->canvas,
1885 im->xorigin+im->xsize+2, im->yorigin-2,
1886 im->xorigin+im->xsize+2, im->yorigin+3,
1887 im->xorigin+im->xsize+7, im->yorigin+0.5, /* LINEOFFSET */
1888 im->graph_col[GRC_ARROW]);
1890 gfx_new_area ( im->canvas,
1891 im->xorigin-2, im->yorigin-im->ysize-2,
1892 im->xorigin+3, im->yorigin-im->ysize-2,
1893 im->xorigin+0.5, im->yorigin-im->ysize-7, /* LINEOFFSET */
1894 im->graph_col[GRC_ARROW]);
1899 grid_paint(image_desc_t *im)
1903 double X0,Y0; /* points for filled graph and more*/
1906 /* draw 3d border */
1907 node = gfx_new_area (im->canvas, 0,im->yimg,
1909 2,2,im->graph_col[GRC_SHADEA]);
1910 gfx_add_point( node , im->ximg - 2, 2 );
1911 gfx_add_point( node , im->ximg, 0 );
1912 gfx_add_point( node , 0,0 );
1913 /* gfx_add_point( node , 0,im->yimg ); */
1915 node = gfx_new_area (im->canvas, 2,im->yimg-2,
1916 im->ximg-2,im->yimg-2,
1918 im->graph_col[GRC_SHADEB]);
1919 gfx_add_point( node , im->ximg,0);
1920 gfx_add_point( node , im->ximg,im->yimg);
1921 gfx_add_point( node , 0,im->yimg);
1922 /* gfx_add_point( node , 0,im->yimg ); */
1925 if (im->draw_x_grid == 1 )
1928 if (im->draw_y_grid == 1){
1929 if(im->logarithmic){
1930 res = horizontal_log_grid(im);
1932 res = draw_horizontal_grid(im);
1935 /* dont draw horizontal grid if there is no min and max val */
1937 char *nodata = "No Data found";
1938 gfx_new_text(im->canvas,im->ximg/2, (2*im->yorigin-im->ysize) / 2,
1939 im->graph_col[GRC_FONT],
1940 im->text_prop[TEXT_PROP_AXIS].font,
1941 im->text_prop[TEXT_PROP_AXIS].size,
1942 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_CENTER,
1947 /* yaxis unit description */
1948 gfx_new_text( im->canvas,
1949 10, (im->yorigin - im->ysize/2),
1950 im->graph_col[GRC_FONT],
1951 im->text_prop[TEXT_PROP_UNIT].font,
1952 im->text_prop[TEXT_PROP_UNIT].size, im->tabwidth,
1953 RRDGRAPH_YLEGEND_ANGLE,
1954 GFX_H_LEFT, GFX_V_CENTER,
1958 gfx_new_text( im->canvas,
1959 im->ximg/2, im->text_prop[TEXT_PROP_TITLE].size*1.3+4,
1960 im->graph_col[GRC_FONT],
1961 im->text_prop[TEXT_PROP_TITLE].font,
1962 im->text_prop[TEXT_PROP_TITLE].size, im->tabwidth, 0.0,
1963 GFX_H_CENTER, GFX_V_CENTER,
1965 /* rrdtool 'logo' */
1966 gfx_new_text( im->canvas,
1968 ( im->graph_col[GRC_FONT] & 0xffffff00 ) | 0x00000044,
1969 im->text_prop[TEXT_PROP_AXIS].font,
1970 5.5, im->tabwidth, 270,
1971 GFX_H_RIGHT, GFX_V_TOP,
1972 "RRDTOOL / TOBI OETIKER");
1975 if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
1976 for(i=0;i<im->gdes_c;i++){
1977 if(im->gdes[i].legend[0] =='\0')
1980 /* im->gdes[i].leg_y is the bottom of the legend */
1981 X0 = im->gdes[i].leg_x;
1982 Y0 = im->gdes[i].leg_y;
1983 gfx_new_text ( im->canvas, X0, Y0,
1984 im->graph_col[GRC_FONT],
1985 im->text_prop[TEXT_PROP_LEGEND].font,
1986 im->text_prop[TEXT_PROP_LEGEND].size,
1987 im->tabwidth,0.0, GFX_H_LEFT, GFX_V_BOTTOM,
1988 im->gdes[i].legend );
1989 /* The legend for GRAPH items starts with "M " to have
1990 enough space for the box */
1991 if ( im->gdes[i].gf != GF_PRINT &&
1992 im->gdes[i].gf != GF_GPRINT &&
1993 im->gdes[i].gf != GF_COMMENT) {
1994 int boxL, boxH, boxV;
1996 boxL = gfx_get_text_width(im->canvas, 0,
1997 im->text_prop[TEXT_PROP_LEGEND].font,
1998 im->text_prop[TEXT_PROP_LEGEND].size,
1999 im->tabwidth,"oo", 0);
2003 /* make sure transparent colors show up all the same */
2004 node = gfx_new_area(im->canvas,
2008 im->graph_col[GRC_BACK]);
2009 gfx_add_point ( node, X0+boxL+0.5, Y0-boxV );
2010 node = gfx_new_area(im->canvas,
2014 im->graph_col[GRC_CANVAS]);
2015 gfx_add_point ( node, X0+boxH, Y0-boxV );
2017 node = gfx_new_area(im->canvas,
2022 gfx_add_point ( node, X0+boxH, Y0-boxV );
2023 node = gfx_new_line(im->canvas,
2026 1,im->graph_col[GRC_FRAME]);
2027 gfx_add_point(node,X0+boxH,Y0);
2028 gfx_add_point(node,X0+boxH,Y0-boxV);
2029 gfx_close_path(node);
2036 /*****************************************************
2037 * lazy check make sure we rely need to create this graph
2038 *****************************************************/
2040 int lazy_check(image_desc_t *im){
2043 struct stat imgstat;
2045 if (im->lazy == 0) return 0; /* no lazy option */
2046 if (stat(im->graphfile,&imgstat) != 0)
2047 return 0; /* can't stat */
2048 /* one pixel in the existing graph is more then what we would
2050 if (time(NULL) - imgstat.st_mtime >
2051 (im->end - im->start) / im->xsize)
2053 if ((fd = fopen(im->graphfile,"rb")) == NULL)
2054 return 0; /* the file does not exist */
2055 switch (im->canvas->imgformat) {
2057 size = PngSize(fd,&(im->ximg),&(im->yimg));
2066 #ifdef WITH_PIECHART
2068 pie_part(image_desc_t *im, gfx_color_t color,
2069 double PieCenterX, double PieCenterY, double Radius,
2070 double startangle, double endangle)
2074 double step=M_PI/50; /* Number of iterations for the circle;
2075 ** 10 is definitely too low, more than
2076 ** 50 seems to be overkill
2079 /* Strange but true: we have to work clockwise or else
2080 ** anti aliasing nor transparency don't work.
2082 ** This test is here to make sure we do it right, also
2083 ** this makes the for...next loop more easy to implement.
2084 ** The return will occur if the user enters a negative number
2085 ** (which shouldn't be done according to the specs) or if the
2086 ** programmers do something wrong (which, as we all know, never
2087 ** happens anyway :)
2089 if (endangle<startangle) return;
2091 /* Hidden feature: Radius decreases each full circle */
2093 while (angle>=2*M_PI) {
2098 node=gfx_new_area(im->canvas,
2099 PieCenterX+sin(startangle)*Radius,
2100 PieCenterY-cos(startangle)*Radius,
2103 PieCenterX+sin(endangle)*Radius,
2104 PieCenterY-cos(endangle)*Radius,
2106 for (angle=endangle;angle-startangle>=step;angle-=step) {
2108 PieCenterX+sin(angle)*Radius,
2109 PieCenterY-cos(angle)*Radius );
2116 graph_size_location(image_desc_t *im, int elements
2118 #ifdef WITH_PIECHART
2124 /* The actual size of the image to draw is determined from
2125 ** several sources. The size given on the command line is
2126 ** the graph area but we need more as we have to draw labels
2127 ** and other things outside the graph area
2130 /* +-+-------------------------------------------+
2131 ** |l|.................title.....................|
2132 ** |e+--+-------------------------------+--------+
2135 ** |l| l| main graph area | chart |
2138 ** |r+--+-------------------------------+--------+
2139 ** |e| | x-axis labels | |
2140 ** |v+--+-------------------------------+--------+
2141 ** | |..............legends......................|
2142 ** +-+-------------------------------------------+
2148 #ifdef WITH_PIECHART
2153 Xlegend =0, Ylegend =0,
2155 Xspacing =15, Yspacing =15;
2157 if (im->extra_flags & ONLY_GRAPH) {
2159 im->ximg = im->xsize;
2160 im->yimg = im->ysize;
2161 im->yorigin = im->ysize;
2165 if (im->ylegend[0] != '\0' ) {
2166 Xvertical = im->text_prop[TEXT_PROP_UNIT].size *2;
2170 if (im->title[0] != '\0') {
2171 /* The title is placed "inbetween" two text lines so it
2172 ** automatically has some vertical spacing. The horizontal
2173 ** spacing is added here, on each side.
2175 /* don't care for the with of the title
2176 Xtitle = gfx_get_text_width(im->canvas, 0,
2177 im->text_prop[TEXT_PROP_TITLE].font,
2178 im->text_prop[TEXT_PROP_TITLE].size,
2180 im->title, 0) + 2*Xspacing; */
2181 Ytitle = im->text_prop[TEXT_PROP_TITLE].size*2.6+10;
2187 if (im->draw_x_grid) {
2188 Yxlabel=im->text_prop[TEXT_PROP_AXIS].size *2.5;
2190 if (im->draw_y_grid) {
2191 Xylabel=gfx_get_text_width(im->canvas, 0,
2192 im->text_prop[TEXT_PROP_AXIS].font,
2193 im->text_prop[TEXT_PROP_AXIS].size,
2195 "0", 0) * im->unitslength;
2199 #ifdef WITH_PIECHART
2201 im->piesize=im->xsize<im->ysize?im->xsize:im->ysize;
2207 /* Now calculate the total size. Insert some spacing where
2208 desired. im->xorigin and im->yorigin need to correspond
2209 with the lower left corner of the main graph area or, if
2210 this one is not set, the imaginary box surrounding the
2213 /* The legend width cannot yet be determined, as a result we
2214 ** have problems adjusting the image to it. For now, we just
2215 ** forget about it at all; the legend will have to fit in the
2216 ** size already allocated.
2218 im->ximg = Xylabel + Xmain + 2 * Xspacing;
2220 #ifdef WITH_PIECHART
2224 if (Xmain) im->ximg += Xspacing;
2225 #ifdef WITH_PIECHART
2226 if (Xpie) im->ximg += Xspacing;
2229 im->xorigin = Xspacing + Xylabel;
2231 /* the length of the title should not influence with width of the graph
2232 if (Xtitle > im->ximg) im->ximg = Xtitle; */
2234 if (Xvertical) { /* unit description */
2235 im->ximg += Xvertical;
2236 im->xorigin += Xvertical;
2240 /* The vertical size is interesting... we need to compare
2241 ** the sum of {Ytitle, Ymain, Yxlabel, Ylegend} with Yvertical
2242 ** however we need to know {Ytitle+Ymain+Yxlabel} in order to
2243 ** start even thinking about Ylegend.
2245 ** Do it in three portions: First calculate the inner part,
2246 ** then do the legend, then adjust the total height of the img.
2249 /* reserve space for main and/or pie */
2251 im->yimg = Ymain + Yxlabel;
2253 #ifdef WITH_PIECHART
2254 if (im->yimg < Ypie) im->yimg = Ypie;
2257 im->yorigin = im->yimg - Yxlabel;
2259 /* reserve space for the title *or* some padding above the graph */
2262 im->yorigin += Ytitle;
2264 im->yimg += 1.5*Yspacing;
2265 im->yorigin += 1.5*Yspacing;
2267 /* reserve space for padding below the graph */
2268 im->yimg += Yspacing;
2271 /* Determine where to place the legends onto the image.
2272 ** Adjust im->yimg to match the space requirements.
2274 if(leg_place(im)==-1)
2279 if (Xlegend > im->ximg) {
2281 /* reposition Pie */
2285 #ifdef WITH_PIECHART
2286 /* The pie is placed in the upper right hand corner,
2287 ** just below the title (if any) and with sufficient
2291 im->pie_x = im->ximg - Xspacing - Xpie/2;
2292 im->pie_y = im->yorigin-Ymain+Ypie/2;
2294 im->pie_x = im->ximg/2;
2295 im->pie_y = im->yorigin-Ypie/2;
2302 /* draw that picture thing ... */
2304 graph_paint(image_desc_t *im, char ***calcpr)
2307 int lazy = lazy_check(im);
2308 #ifdef WITH_PIECHART
2310 double PieStart=0.0;
2315 double areazero = 0.0;
2316 enum gf_en stack_gf = GF_PRINT;
2317 graph_desc_t *lastgdes = NULL;
2319 /* if we are lazy and there is nothing to PRINT ... quit now */
2320 if (lazy && im->prt_c==0) return 0;
2322 /* pull the data from the rrd files ... */
2324 if(data_fetch(im)==-1)
2327 /* evaluate VDEF and CDEF operations ... */
2328 if(data_calc(im)==-1)
2331 #ifdef WITH_PIECHART
2332 /* check if we need to draw a piechart */
2333 for(i=0;i<im->gdes_c;i++){
2334 if (im->gdes[i].gf == GF_PART) {
2341 /* calculate and PRINT and GPRINT definitions. We have to do it at
2342 * this point because it will affect the length of the legends
2343 * if there are no graph elements we stop here ...
2344 * if we are lazy, try to quit ...
2346 i=print_calc(im,calcpr);
2349 #ifdef WITH_PIECHART
2352 ) || lazy) return 0;
2354 #ifdef WITH_PIECHART
2355 /* If there's only the pie chart to draw, signal this */
2356 if (i==0) piechart=2;
2359 /* get actual drawing data and find min and max values*/
2360 if(data_proc(im)==-1)
2363 if(!im->logarithmic){si_unit(im);} /* identify si magnitude Kilo, Mega Giga ? */
2365 if(!im->rigid && ! im->logarithmic)
2366 expand_range(im); /* make sure the upper and lower limit are
2369 if (!calc_horizontal_grid(im))
2376 /**************************************************************
2377 *** Calculating sizes and locations became a bit confusing ***
2378 *** so I moved this into a separate function. ***
2379 **************************************************************/
2380 if(graph_size_location(im,i
2381 #ifdef WITH_PIECHART
2387 /* the actual graph is created by going through the individual
2388 graph elements and then drawing them */
2390 node=gfx_new_area ( im->canvas,
2394 im->graph_col[GRC_BACK]);
2396 gfx_add_point(node,im->ximg, 0);
2398 #ifdef WITH_PIECHART
2399 if (piechart != 2) {
2401 node=gfx_new_area ( im->canvas,
2402 im->xorigin, im->yorigin,
2403 im->xorigin + im->xsize, im->yorigin,
2404 im->xorigin + im->xsize, im->yorigin-im->ysize,
2405 im->graph_col[GRC_CANVAS]);
2407 gfx_add_point(node,im->xorigin, im->yorigin - im->ysize);
2409 if (im->minval > 0.0)
2410 areazero = im->minval;
2411 if (im->maxval < 0.0)
2412 areazero = im->maxval;
2413 #ifdef WITH_PIECHART
2417 #ifdef WITH_PIECHART
2419 pie_part(im,im->graph_col[GRC_CANVAS],im->pie_x,im->pie_y,im->piesize*0.5,0,2*M_PI);
2423 for(i=0;i<im->gdes_c;i++){
2424 switch(im->gdes[i].gf){
2437 for (ii = 0; ii < im->xsize; ii++)
2439 if (!isnan(im->gdes[i].p_data[ii]) &&
2440 im->gdes[i].p_data[ii] > 0.0)
2442 /* generate a tick */
2443 gfx_new_line(im->canvas, im -> xorigin + ii,
2444 im -> yorigin - (im -> gdes[i].yrule * im -> ysize),
2448 im -> gdes[i].col );
2454 stack_gf = im->gdes[i].gf;
2456 /* fix data points at oo and -oo */
2457 for(ii=0;ii<im->xsize;ii++){
2458 if (isinf(im->gdes[i].p_data[ii])){
2459 if (im->gdes[i].p_data[ii] > 0) {
2460 im->gdes[i].p_data[ii] = im->maxval ;
2462 im->gdes[i].p_data[ii] = im->minval ;
2468 /* *******************************************************
2473 -------|--t-1--t--------------------------------
2475 if we know the value at time t was a then
2476 we draw a square from t-1 to t with the value a.
2478 ********************************************************* */
2479 if (im->gdes[i].col != 0x0){
2480 /* GF_LINE and friend */
2481 if(stack_gf == GF_LINE ){
2483 for(ii=1;ii<im->xsize;ii++){
2484 if (isnan(im->gdes[i].p_data[ii]) || (im->slopemode==1 && isnan(im->gdes[i].p_data[ii-1]))){
2488 if ( node == NULL ) {
2489 if ( im->slopemode == 0 ){
2490 node = gfx_new_line(im->canvas,
2491 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii]),
2492 ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]),
2493 im->gdes[i].linewidth,
2496 node = gfx_new_line(im->canvas,
2497 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii-1]),
2498 ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]),
2499 im->gdes[i].linewidth,
2503 if ( im->slopemode==0 ){
2504 gfx_add_point(node,ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii]));
2506 gfx_add_point(node,ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]));
2511 double ybase0 = DNAN,ytop0=DNAN;
2512 for(ii=0;ii<im->xsize;ii++){
2513 /* keep things simple for now, just draw these bars
2514 do not try to build a big and complex area */
2516 if ( im->slopemode == 0 && ii==0){
2519 if ( isnan(im->gdes[i].p_data[ii]) ) {
2523 ytop = ytr(im,im->gdes[i].p_data[ii]);
2524 if ( lastgdes && im->gdes[i].stack ) {
2525 ybase = ytr(im,lastgdes->p_data[ii]);
2527 ybase = ytr(im,areazero);
2529 if ( ybase == ytop ){
2533 /* every area has to be wound clock-wise,
2534 so we have to make sur base remains base */
2536 double extra = ytop;
2540 if ( im->slopemode == 0){
2544 if ( !isnan(ybase0) ){
2545 node = gfx_new_area(im->canvas,
2546 (double)ii-1.2+(double)im->xorigin,ybase0-0.2,
2547 (double)ii-1.2+(double)im->xorigin,ytop0+0.2,
2548 (double)ii+0.2+(double)im->xorigin,ytop+0.2,
2552 (double)ii+0.02+im->xorigin,ybase-0.2
2558 } /* else GF_LINE */
2559 } /* if color != 0x0 */
2560 /* make sure we do not run into trouble when stacking on NaN */
2561 for(ii=0;ii<im->xsize;ii++){
2562 if (isnan(im->gdes[i].p_data[ii])) {
2563 if (lastgdes && (im->gdes[i].stack)) {
2564 im->gdes[i].p_data[ii] = lastgdes->p_data[ii];
2566 im->gdes[i].p_data[ii] = ytr(im,areazero);
2570 lastgdes = &(im->gdes[i]);
2572 #ifdef WITH_PIECHART
2574 if(isnan(im->gdes[i].yrule)) /* fetch variable */
2575 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2577 if (finite(im->gdes[i].yrule)) { /* even the fetched var can be NaN */
2578 pie_part(im,im->gdes[i].col,
2579 im->pie_x,im->pie_y,im->piesize*0.4,
2580 M_PI*2.0*PieStart/100.0,
2581 M_PI*2.0*(PieStart+im->gdes[i].yrule)/100.0);
2582 PieStart += im->gdes[i].yrule;
2589 #ifdef WITH_PIECHART
2597 /* grid_paint also does the text */
2598 if( !(im->extra_flags & ONLY_GRAPH) )
2602 if( !(im->extra_flags & ONLY_GRAPH) )
2605 /* the RULES are the last thing to paint ... */
2606 for(i=0;i<im->gdes_c;i++){
2608 switch(im->gdes[i].gf){
2610 if(isnan(im->gdes[i].yrule)) { /* fetch variable */
2611 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2613 if(im->gdes[i].yrule >= im->minval
2614 && im->gdes[i].yrule <= im->maxval)
2615 gfx_new_line(im->canvas,
2616 im->xorigin,ytr(im,im->gdes[i].yrule),
2617 im->xorigin+im->xsize,ytr(im,im->gdes[i].yrule),
2618 1.0,im->gdes[i].col);
2621 if(im->gdes[i].xrule == 0) { /* fetch variable */
2622 im->gdes[i].xrule = im->gdes[im->gdes[i].vidx].vf.when;
2624 if(im->gdes[i].xrule >= im->start
2625 && im->gdes[i].xrule <= im->end)
2626 gfx_new_line(im->canvas,
2627 xtr(im,im->gdes[i].xrule),im->yorigin,
2628 xtr(im,im->gdes[i].xrule),im->yorigin-im->ysize,
2629 1.0,im->gdes[i].col);
2637 if (strcmp(im->graphfile,"-")==0) {
2638 fo = im->graphhandle ? im->graphhandle : stdout;
2639 #if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
2640 /* Change translation mode for stdout to BINARY */
2641 _setmode( _fileno( fo ), O_BINARY );
2644 if ((fo = fopen(im->graphfile,"wb")) == NULL) {
2645 rrd_set_error("Opening '%s' for write: %s",im->graphfile,
2646 rrd_strerror(errno));
2650 gfx_render (im->canvas,im->ximg,im->yimg,0x00000000,fo);
2651 if (strcmp(im->graphfile,"-") != 0)
2657 /*****************************************************
2659 *****************************************************/
2662 gdes_alloc(image_desc_t *im){
2665 if ((im->gdes = (graph_desc_t *) rrd_realloc(im->gdes, (im->gdes_c)
2666 * sizeof(graph_desc_t)))==NULL){
2667 rrd_set_error("realloc graph_descs");
2672 im->gdes[im->gdes_c-1].step=im->step;
2673 im->gdes[im->gdes_c-1].stack=0;
2674 im->gdes[im->gdes_c-1].debug=0;
2675 im->gdes[im->gdes_c-1].start=im->start;
2676 im->gdes[im->gdes_c-1].end=im->end;
2677 im->gdes[im->gdes_c-1].vname[0]='\0';
2678 im->gdes[im->gdes_c-1].data=NULL;
2679 im->gdes[im->gdes_c-1].ds_namv=NULL;
2680 im->gdes[im->gdes_c-1].data_first=0;
2681 im->gdes[im->gdes_c-1].p_data=NULL;
2682 im->gdes[im->gdes_c-1].rpnp=NULL;
2683 im->gdes[im->gdes_c-1].shift=0;
2684 im->gdes[im->gdes_c-1].col = 0x0;
2685 im->gdes[im->gdes_c-1].legend[0]='\0';
2686 im->gdes[im->gdes_c-1].format[0]='\0';
2687 im->gdes[im->gdes_c-1].rrd[0]='\0';
2688 im->gdes[im->gdes_c-1].ds=-1;
2689 im->gdes[im->gdes_c-1].p_data=NULL;
2690 im->gdes[im->gdes_c-1].yrule=DNAN;
2691 im->gdes[im->gdes_c-1].xrule=0;
2695 /* copies input untill the first unescaped colon is found
2696 or until input ends. backslashes have to be escaped as well */
2698 scan_for_col(char *input, int len, char *output)
2703 input[inp] != ':' &&
2706 if (input[inp] == '\\' &&
2707 input[inp+1] != '\0' &&
2708 (input[inp+1] == '\\' ||
2709 input[inp+1] == ':')){
2710 output[outp++] = input[++inp];
2713 output[outp++] = input[inp];
2716 output[outp] = '\0';
2719 /* Some surgery done on this function, it became ridiculously big.
2721 ** - initializing now in rrd_graph_init()
2722 ** - options parsing now in rrd_graph_options()
2723 ** - script parsing now in rrd_graph_script()
2726 rrd_graph(int argc, char **argv, char ***prdata, int *xsize, int *ysize, FILE *stream, double *ymin, double *ymax)
2729 rrd_graph_init(&im);
2730 im.graphhandle = stream;
2732 rrd_graph_options(argc,argv,&im);
2733 if (rrd_test_error()) {
2738 if (strlen(argv[optind])>=MAXPATH) {
2739 rrd_set_error("filename (including path) too long");
2743 strncpy(im.graphfile,argv[optind],MAXPATH-1);
2744 im.graphfile[MAXPATH-1]='\0';
2746 rrd_graph_script(argc,argv,&im,1);
2747 if (rrd_test_error()) {
2752 /* Everything is now read and the actual work can start */
2755 if (graph_paint(&im,prdata)==-1){
2760 /* The image is generated and needs to be output.
2761 ** Also, if needed, print a line with information about the image.
2771 /* maybe prdata is not allocated yet ... lets do it now */
2772 if ((*prdata = calloc(2,sizeof(char *)))==NULL) {
2773 rrd_set_error("malloc imginfo");
2777 if(((*prdata)[0] = malloc((strlen(im.imginfo)+200+strlen(im.graphfile))*sizeof(char)))
2779 rrd_set_error("malloc imginfo");
2782 filename=im.graphfile+strlen(im.graphfile);
2783 while(filename > im.graphfile) {
2784 if (*(filename-1)=='/' || *(filename-1)=='\\' ) break;
2788 sprintf((*prdata)[0],im.imginfo,filename,(long)(im.canvas->zoom*im.ximg),(long)(im.canvas->zoom*im.yimg));
2795 rrd_graph_init(image_desc_t *im)
2802 #ifdef HAVE_SETLOCALE
2803 setlocale(LC_TIME,"");
2808 im->xlab_user.minsec = -1;
2814 im->ylegend[0] = '\0';
2815 im->title[0] = '\0';
2818 im->unitsexponent= 9999;
2821 im->viewfactor = 1.0;
2828 im->logarithmic = 0;
2829 im->ygridstep = DNAN;
2830 im->draw_x_grid = 1;
2831 im->draw_y_grid = 1;
2836 im->canvas = gfx_new_canvas();
2837 im->grid_dash_on = 1;
2838 im->grid_dash_off = 1;
2839 im->tabwidth = 40.0;
2841 for(i=0;i<DIM(graph_col);i++)
2842 im->graph_col[i]=graph_col[i];
2844 #if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
2847 char rrd_win_default_font[1000];
2848 windir = getenv("windir");
2849 /* %windir% is something like D:\windows or C:\winnt */
2850 if (windir != NULL) {
2851 strncpy(rrd_win_default_font,windir,999);
2852 rrd_win_default_font[999] = '\0';
2853 strcat(rrd_win_default_font,"\\fonts\\");
2854 strcat(rrd_win_default_font,RRD_DEFAULT_FONT);
2855 for(i=0;i<DIM(text_prop);i++){
2856 strncpy(text_prop[i].font,rrd_win_default_font,sizeof(text_prop[i].font)-1);
2857 text_prop[i].font[sizeof(text_prop[i].font)-1] = '\0';
2864 deffont = getenv("RRD_DEFAULT_FONT");
2865 if (deffont != NULL) {
2866 for(i=0;i<DIM(text_prop);i++){
2867 strncpy(text_prop[i].font,deffont,sizeof(text_prop[i].font)-1);
2868 text_prop[i].font[sizeof(text_prop[i].font)-1] = '\0';
2872 for(i=0;i<DIM(text_prop);i++){
2873 im->text_prop[i].size = text_prop[i].size;
2874 strcpy(im->text_prop[i].font,text_prop[i].font);
2879 rrd_graph_options(int argc, char *argv[],image_desc_t *im)
2882 char *parsetime_error = NULL;
2883 char scan_gtm[12],scan_mtm[12],scan_ltm[12],col_nam[12];
2884 time_t start_tmp=0,end_tmp=0;
2886 struct rrd_time_value start_tv, end_tv;
2888 optind = 0; opterr = 0; /* initialize getopt */
2890 parsetime("end-24h", &start_tv);
2891 parsetime("now", &end_tv);
2894 static struct option long_options[] =
2896 {"start", required_argument, 0, 's'},
2897 {"end", required_argument, 0, 'e'},
2898 {"x-grid", required_argument, 0, 'x'},
2899 {"y-grid", required_argument, 0, 'y'},
2900 {"vertical-label",required_argument,0,'v'},
2901 {"width", required_argument, 0, 'w'},
2902 {"height", required_argument, 0, 'h'},
2903 {"interlaced", no_argument, 0, 'i'},
2904 {"upper-limit",required_argument, 0, 'u'},
2905 {"lower-limit",required_argument, 0, 'l'},
2906 {"rigid", no_argument, 0, 'r'},
2907 {"base", required_argument, 0, 'b'},
2908 {"logarithmic",no_argument, 0, 'o'},
2909 {"color", required_argument, 0, 'c'},
2910 {"font", required_argument, 0, 'n'},
2911 {"title", required_argument, 0, 't'},
2912 {"imginfo", required_argument, 0, 'f'},
2913 {"imgformat", required_argument, 0, 'a'},
2914 {"lazy", no_argument, 0, 'z'},
2915 {"zoom", required_argument, 0, 'm'},
2916 {"no-legend", no_argument, 0, 'g'},
2917 {"force-rules-legend",no_argument,0, 'F'},
2918 {"only-graph", no_argument, 0, 'j'},
2919 {"alt-y-grid", no_argument, 0, 'Y'},
2920 {"no-minor", no_argument, 0, 'I'},
2921 {"slope-mode", no_argument, 0, 'E'},
2922 {"alt-autoscale", no_argument, 0, 'A'},
2923 {"alt-autoscale-max", no_argument, 0, 'M'},
2924 {"no-gridfit", no_argument, 0, 'N'},
2925 {"units-exponent",required_argument, 0, 'X'},
2926 {"units-length",required_argument, 0, 'L'},
2927 {"step", required_argument, 0, 'S'},
2928 {"tabwidth", required_argument, 0, 'T'},
2929 {"font-render-mode", required_argument, 0, 'R'},
2930 {"font-smoothing-threshold", required_argument, 0, 'B'},
2932 int option_index = 0;
2934 int col_start,col_end;
2936 opt = getopt_long(argc, argv,
2937 "s:e:x:y:v:w:h:iu:l:rb:oc:n:m:t:f:a:I:zgjFYAMEX:L:S:T:NR:B:",
2938 long_options, &option_index);
2945 im->extra_flags |= NOMINOR;
2948 im->extra_flags |= ALTYGRID;
2951 im->extra_flags |= ALTAUTOSCALE;
2954 im->extra_flags |= ALTAUTOSCALE_MAX;
2957 im->extra_flags |= ONLY_GRAPH;
2960 im->extra_flags |= NOLEGEND;
2963 im->extra_flags |= FORCE_RULES_LEGEND;
2966 im->unitsexponent = atoi(optarg);
2969 im->unitslength = atoi(optarg);
2972 im->tabwidth = atof(optarg);
2975 im->step = atoi(optarg);
2981 if ((parsetime_error = parsetime(optarg, &start_tv))) {
2982 rrd_set_error( "start time: %s", parsetime_error );
2987 if ((parsetime_error = parsetime(optarg, &end_tv))) {
2988 rrd_set_error( "end time: %s", parsetime_error );
2993 if(strcmp(optarg,"none") == 0){
2999 "%10[A-Z]:%ld:%10[A-Z]:%ld:%10[A-Z]:%ld:%ld:%n",
3001 &im->xlab_user.gridst,
3003 &im->xlab_user.mgridst,
3005 &im->xlab_user.labst,
3006 &im->xlab_user.precis,
3007 &stroff) == 7 && stroff != 0){
3008 strncpy(im->xlab_form, optarg+stroff, sizeof(im->xlab_form) - 1);
3009 im->xlab_form[sizeof(im->xlab_form)-1] = '\0';
3010 if((int)(im->xlab_user.gridtm = tmt_conv(scan_gtm)) == -1){
3011 rrd_set_error("unknown keyword %s",scan_gtm);
3013 } else if ((int)(im->xlab_user.mgridtm = tmt_conv(scan_mtm)) == -1){
3014 rrd_set_error("unknown keyword %s",scan_mtm);
3016 } else if ((int)(im->xlab_user.labtm = tmt_conv(scan_ltm)) == -1){
3017 rrd_set_error("unknown keyword %s",scan_ltm);
3020 im->xlab_user.minsec = 1;
3021 im->xlab_user.stst = im->xlab_form;
3023 rrd_set_error("invalid x-grid format");
3029 if(strcmp(optarg,"none") == 0){
3037 &im->ylabfact) == 2) {
3038 if(im->ygridstep<=0){
3039 rrd_set_error("grid step must be > 0");
3041 } else if (im->ylabfact < 1){
3042 rrd_set_error("label factor must be > 0");
3046 rrd_set_error("invalid y-grid format");
3051 strncpy(im->ylegend,optarg,150);
3052 im->ylegend[150]='\0';
3055 im->maxval = atof(optarg);
3058 im->minval = atof(optarg);
3061 im->base = atol(optarg);
3062 if(im->base != 1024 && im->base != 1000 ){
3063 rrd_set_error("the only sensible value for base apart from 1000 is 1024");
3068 long_tmp = atol(optarg);
3069 if (long_tmp < 10) {
3070 rrd_set_error("width below 10 pixels");
3073 im->xsize = long_tmp;
3076 long_tmp = atol(optarg);
3077 if (long_tmp < 10) {
3078 rrd_set_error("height below 10 pixels");
3081 im->ysize = long_tmp;
3084 im->canvas->interlaced = 1;
3090 im->imginfo = optarg;
3093 if((int)(im->canvas->imgformat = if_conv(optarg)) == -1) {
3094 rrd_set_error("unsupported graphics format '%s'",optarg);
3106 im->logarithmic = 1;
3107 if (isnan(im->minval))
3112 "%10[A-Z]#%n%8lx%n",
3113 col_nam,&col_start,&color,&col_end) == 2){
3115 int col_len = col_end - col_start;
3119 ((color & 0xF00) * 0x110000) |
3120 ((color & 0x0F0) * 0x011000) |
3121 ((color & 0x00F) * 0x001100) |
3127 ((color & 0xF000) * 0x11000) |
3128 ((color & 0x0F00) * 0x01100) |
3129 ((color & 0x00F0) * 0x00110) |
3130 ((color & 0x000F) * 0x00011)
3134 color = (color << 8) + 0xff /* shift left by 8 */;
3139 rrd_set_error("the color format is #RRGGBB[AA]");
3142 if((ci=grc_conv(col_nam)) != -1){
3143 im->graph_col[ci]=color;
3145 rrd_set_error("invalid color name '%s'",col_nam);
3149 rrd_set_error("invalid color def format");
3159 "%10[A-Z]:%lf:%1000s",
3160 prop,&size,font) == 3){
3162 if((sindex=text_prop_conv(prop)) != -1){
3163 im->text_prop[sindex].size=size;
3164 strcpy(im->text_prop[sindex].font,font);
3165 if (sindex==0) { /* the default */
3166 im->text_prop[TEXT_PROP_TITLE].size=size;
3167 strcpy(im->text_prop[TEXT_PROP_TITLE].font,font);
3168 im->text_prop[TEXT_PROP_AXIS].size=size;
3169 strcpy(im->text_prop[TEXT_PROP_AXIS].font,font);
3170 im->text_prop[TEXT_PROP_UNIT].size=size;
3171 strcpy(im->text_prop[TEXT_PROP_UNIT].font,font);
3172 im->text_prop[TEXT_PROP_LEGEND].size=size;
3173 strcpy(im->text_prop[TEXT_PROP_LEGEND].font,font);
3176 rrd_set_error("invalid fonttag '%s'",prop);
3180 rrd_set_error("invalid text property format");
3186 im->canvas->zoom = atof(optarg);
3187 if (im->canvas->zoom <= 0.0) {
3188 rrd_set_error("zoom factor must be > 0");
3193 strncpy(im->title,optarg,150);
3194 im->title[150]='\0';
3198 if ( strcmp( optarg, "normal" ) == 0 )
3199 im->canvas->aa_type = AA_NORMAL;
3200 else if ( strcmp( optarg, "light" ) == 0 )
3201 im->canvas->aa_type = AA_LIGHT;
3202 else if ( strcmp( optarg, "mono" ) == 0 )
3203 im->canvas->aa_type = AA_NONE;
3206 rrd_set_error("unknown font-render-mode '%s'", optarg );
3212 im->canvas->font_aa_threshold = atof(optarg);
3217 rrd_set_error("unknown option '%c'", optopt);
3219 rrd_set_error("unknown option '%s'",argv[optind-1]);
3224 if (optind >= argc) {
3225 rrd_set_error("missing filename");
3229 if (im->logarithmic == 1 && (im->minval <= 0 || isnan(im->minval))){
3230 rrd_set_error("for a logarithmic yaxis you must specify a lower-limit > 0");
3234 if (proc_start_end(&start_tv,&end_tv,&start_tmp,&end_tmp) == -1){
3235 /* error string is set in parsetime.c */
3239 if (start_tmp < 3600*24*365*10){
3240 rrd_set_error("the first entry to fetch should be after 1980 (%ld)",start_tmp);
3244 if (end_tmp < start_tmp) {
3245 rrd_set_error("start (%ld) should be less than end (%ld)",
3246 start_tmp, end_tmp);
3250 im->start = start_tmp;
3252 im->step = max((long)im->step, (im->end-im->start)/im->xsize);
3256 rrd_graph_check_vname(image_desc_t *im, char *varname, char *err)
3258 if ((im->gdes[im->gdes_c-1].vidx=find_var(im,varname))==-1) {
3259 rrd_set_error("Unknown variable '%s' in %s",varname,err);
3265 rrd_graph_color(image_desc_t *im, char *var, char *err, int optional)
3268 graph_desc_t *gdp=&im->gdes[im->gdes_c-1];
3270 color=strstr(var,"#");
3273 rrd_set_error("Found no color in %s",err);
3282 rest=strstr(color,":");
3290 sscanf(color,"#%6lx%n",&col,&n);
3291 col = (col << 8) + 0xff /* shift left by 8 */;
3292 if (n!=7) rrd_set_error("Color problem in %s",err);
3295 sscanf(color,"#%8lx%n",&col,&n);
3298 rrd_set_error("Color problem in %s",err);
3300 if (rrd_test_error()) return 0;
3307 int bad_format(char *fmt) {
3311 while (*ptr != '\0')
3312 if (*ptr++ == '%') {
3314 /* line cannot end with percent char */
3315 if (*ptr == '\0') return 1;
3317 /* '%s', '%S' and '%%' are allowed */
3318 if (*ptr == 's' || *ptr == 'S' || *ptr == '%') ptr++;
3320 /* or else '% 6.2lf' and such are allowed */
3323 /* optional padding character */
3324 if (*ptr == ' ' || *ptr == '+' || *ptr == '-') ptr++;
3326 /* This should take care of 'm.n' with all three optional */
3327 while (*ptr >= '0' && *ptr <= '9') ptr++;
3328 if (*ptr == '.') ptr++;
3329 while (*ptr >= '0' && *ptr <= '9') ptr++;
3331 /* Either 'le', 'lf' or 'lg' must follow here */
3332 if (*ptr++ != 'l') return 1;
3333 if (*ptr == 'e' || *ptr == 'f' || *ptr == 'g') ptr++;
3344 vdef_parse(gdes,str)
3345 struct graph_desc_t *gdes;
3348 /* A VDEF currently is either "func" or "param,func"
3349 * so the parsing is rather simple. Change if needed.
3356 sscanf(str,"%le,%29[A-Z]%n",¶m,func,&n);
3357 if (n== (int)strlen(str)) { /* matched */
3361 sscanf(str,"%29[A-Z]%n",func,&n);
3362 if (n== (int)strlen(str)) { /* matched */
3365 rrd_set_error("Unknown function string '%s' in VDEF '%s'"
3372 if (!strcmp("PERCENT",func)) gdes->vf.op = VDEF_PERCENT;
3373 else if (!strcmp("MAXIMUM",func)) gdes->vf.op = VDEF_MAXIMUM;
3374 else if (!strcmp("AVERAGE",func)) gdes->vf.op = VDEF_AVERAGE;
3375 else if (!strcmp("MINIMUM",func)) gdes->vf.op = VDEF_MINIMUM;
3376 else if (!strcmp("TOTAL", func)) gdes->vf.op = VDEF_TOTAL;
3377 else if (!strcmp("FIRST", func)) gdes->vf.op = VDEF_FIRST;
3378 else if (!strcmp("LAST", func)) gdes->vf.op = VDEF_LAST;
3380 rrd_set_error("Unknown function '%s' in VDEF '%s'\n"
3387 switch (gdes->vf.op) {
3389 if (isnan(param)) { /* no parameter given */
3390 rrd_set_error("Function '%s' needs parameter in VDEF '%s'\n"
3396 if (param>=0.0 && param<=100.0) {
3397 gdes->vf.param = param;
3398 gdes->vf.val = DNAN; /* undefined */
3399 gdes->vf.when = 0; /* undefined */
3401 rrd_set_error("Parameter '%f' out of range in VDEF '%s'\n"
3415 gdes->vf.param = DNAN;
3416 gdes->vf.val = DNAN;
3419 rrd_set_error("Function '%s' needs no parameter in VDEF '%s'\n"
3436 graph_desc_t *src,*dst;
3440 dst = &im->gdes[gdi];
3441 src = &im->gdes[dst->vidx];
3442 data = src->data + src->ds;
3443 steps = (src->end - src->start) / src->step;
3446 printf("DEBUG: start == %lu, end == %lu, %lu steps\n"
3453 switch (dst->vf.op) {
3454 case VDEF_PERCENT: {
3455 rrd_value_t * array;
3459 if ((array = malloc(steps*sizeof(double)))==NULL) {
3460 rrd_set_error("malloc VDEV_PERCENT");
3463 for (step=0;step < steps; step++) {
3464 array[step]=data[step*src->ds_cnt];
3466 qsort(array,step,sizeof(double),vdef_percent_compar);
3468 field = (steps-1)*dst->vf.param/100;
3469 dst->vf.val = array[field];
3470 dst->vf.when = 0; /* no time component */
3473 for(step=0;step<steps;step++)
3474 printf("DEBUG: %3li:%10.2f %c\n",step,array[step],step==field?'*':' ');
3480 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3481 if (step == steps) {
3485 dst->vf.val = data[step*src->ds_cnt];
3486 dst->vf.when = src->start + (step+1)*src->step;
3488 while (step != steps) {
3489 if (finite(data[step*src->ds_cnt])) {
3490 if (data[step*src->ds_cnt] > dst->vf.val) {
3491 dst->vf.val = data[step*src->ds_cnt];
3492 dst->vf.when = src->start + (step+1)*src->step;
3499 case VDEF_AVERAGE: {
3502 for (step=0;step<steps;step++) {
3503 if (finite(data[step*src->ds_cnt])) {
3504 sum += data[step*src->ds_cnt];
3509 if (dst->vf.op == VDEF_TOTAL) {
3510 dst->vf.val = sum*src->step;
3511 dst->vf.when = cnt*src->step; /* not really "when" */
3513 dst->vf.val = sum/cnt;
3514 dst->vf.when = 0; /* no time component */
3524 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3525 if (step == steps) {
3529 dst->vf.val = data[step*src->ds_cnt];
3530 dst->vf.when = src->start + (step+1)*src->step;
3532 while (step != steps) {
3533 if (finite(data[step*src->ds_cnt])) {
3534 if (data[step*src->ds_cnt] < dst->vf.val) {
3535 dst->vf.val = data[step*src->ds_cnt];
3536 dst->vf.when = src->start + (step+1)*src->step;
3543 /* The time value returned here is one step before the
3544 * actual time value. This is the start of the first
3548 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3549 if (step == steps) { /* all entries were NaN */
3553 dst->vf.val = data[step*src->ds_cnt];
3554 dst->vf.when = src->start + step*src->step;
3558 /* The time value returned here is the
3559 * actual time value. This is the end of the last
3563 while (step >= 0 && isnan(data[step*src->ds_cnt])) step--;
3564 if (step < 0) { /* all entries were NaN */
3568 dst->vf.val = data[step*src->ds_cnt];
3569 dst->vf.when = src->start + (step+1)*src->step;
3576 /* NaN < -INF < finite_values < INF */
3578 vdef_percent_compar(a,b)
3581 /* Equality is not returned; this doesn't hurt except
3582 * (maybe) for a little performance.
3585 /* First catch NaN values. They are smallest */
3586 if (isnan( *(double *)a )) return -1;
3587 if (isnan( *(double *)b )) return 1;
3589 /* NaN doesn't reach this part so INF and -INF are extremes.
3590 * The sign from isinf() is compatible with the sign we return
3592 if (isinf( *(double *)a )) return isinf( *(double *)a );
3593 if (isinf( *(double *)b )) return isinf( *(double *)b );
3595 /* If we reach this, both values must be finite */
3596 if ( *(double *)a < *(double *)b ) return -1; else return 1;