1 /****************************************************************************
2 * RRDtool 1.2.11 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 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))/im->magfact)) - 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);
435 /* adjust min and max to the grid definition if there is one */
436 im->minval = (double)im->ylabfact * im->ygridstep *
437 floor(im->minval / ((double)im->ylabfact * im->ygridstep));
438 im->maxval = (double)im->ylabfact * im->ygridstep *
439 ceil(im->maxval /( (double)im->ylabfact * im->ygridstep));
443 fprintf(stderr,"SCALED Min: %6.2f Max: %6.2f Factor: %6.2f\n",
444 im->minval,im->maxval,im->magfact);
449 apply_gridfit(image_desc_t *im)
451 if (isnan(im->minval) || isnan(im->maxval))
454 if (im->logarithmic) {
455 double ya, yb, ypix, ypixfrac;
456 double log10_range = log10(im->maxval) - log10(im->minval);
457 ya = pow((double)10, floor(log10(im->minval)));
458 while (ya < im->minval)
461 return; /* don't have y=10^x gridline */
463 if (yb <= im->maxval) {
464 /* we have at least 2 y=10^x gridlines.
465 Make sure distance between them in pixels
466 are an integer by expanding im->maxval */
467 double y_pixel_delta = ytr(im, ya) - ytr(im, yb);
468 double factor = y_pixel_delta / floor(y_pixel_delta);
469 double new_log10_range = factor * log10_range;
470 double new_ymax_log10 = log10(im->minval) + new_log10_range;
471 im->maxval = pow(10, new_ymax_log10);
472 ytr(im,DNAN); /* reset precalc */
473 log10_range = log10(im->maxval) - log10(im->minval);
475 /* make sure first y=10^x gridline is located on
476 integer pixel position by moving scale slightly
477 downwards (sub-pixel movement) */
478 ypix = ytr(im, ya) + im->ysize; /* add im->ysize so it always is positive */
479 ypixfrac = ypix - floor(ypix);
480 if (ypixfrac > 0 && ypixfrac < 1) {
481 double yfrac = ypixfrac / im->ysize;
482 im->minval = pow(10, log10(im->minval) - yfrac * log10_range);
483 im->maxval = pow(10, log10(im->maxval) - yfrac * log10_range);
484 ytr(im,DNAN); /* reset precalc */
487 /* Make sure we have an integer pixel distance between
488 each minor gridline */
489 double ypos1 = ytr(im, im->minval);
490 double ypos2 = ytr(im, im->minval + im->ygrid_scale.gridstep);
491 double y_pixel_delta = ypos1 - ypos2;
492 double factor = y_pixel_delta / floor(y_pixel_delta);
493 double new_range = factor * (im->maxval - im->minval);
494 double gridstep = im->ygrid_scale.gridstep;
495 double minor_y, minor_y_px, minor_y_px_frac;
496 im->maxval = im->minval + new_range;
497 ytr(im,DNAN); /* reset precalc */
498 /* make sure first minor gridline is on integer pixel y coord */
499 minor_y = gridstep * floor(im->minval / gridstep);
500 while (minor_y < im->minval)
502 minor_y_px = ytr(im, minor_y) + im->ysize; /* ensure > 0 by adding ysize */
503 minor_y_px_frac = minor_y_px - floor(minor_y_px);
504 if (minor_y_px_frac > 0 && minor_y_px_frac < 1) {
505 double yfrac = minor_y_px_frac / im->ysize;
506 double range = im->maxval - im->minval;
507 im->minval = im->minval - yfrac * range;
508 im->maxval = im->maxval - yfrac * range;
509 ytr(im,DNAN); /* reset precalc */
511 calc_horizontal_grid(im); /* recalc with changed im->maxval */
515 /* reduce data reimplementation by Alex */
519 enum cf_en cf, /* which consolidation function ?*/
520 unsigned long cur_step, /* step the data currently is in */
521 time_t *start, /* start, end and step as requested ... */
522 time_t *end, /* ... by the application will be ... */
523 unsigned long *step, /* ... adjusted to represent reality */
524 unsigned long *ds_cnt, /* number of data sources in file */
525 rrd_value_t **data) /* two dimensional array containing the data */
527 int i,reduce_factor = ceil((double)(*step) / (double)cur_step);
528 unsigned long col,dst_row,row_cnt,start_offset,end_offset,skiprows=0;
529 rrd_value_t *srcptr,*dstptr;
531 (*step) = cur_step*reduce_factor; /* set new step size for reduced data */
534 row_cnt = ((*end)-(*start))/cur_step;
540 printf("Reducing %lu rows with factor %i time %lu to %lu, step %lu\n",
541 row_cnt,reduce_factor,*start,*end,cur_step);
542 for (col=0;col<row_cnt;col++) {
543 printf("time %10lu: ",*start+(col+1)*cur_step);
544 for (i=0;i<*ds_cnt;i++)
545 printf(" %8.2e",srcptr[*ds_cnt*col+i]);
550 /* We have to combine [reduce_factor] rows of the source
551 ** into one row for the destination. Doing this we also
552 ** need to take care to combine the correct rows. First
553 ** alter the start and end time so that they are multiples
554 ** of the new step time. We cannot reduce the amount of
555 ** time so we have to move the end towards the future and
556 ** the start towards the past.
558 end_offset = (*end) % (*step);
559 start_offset = (*start) % (*step);
561 /* If there is a start offset (which cannot be more than
562 ** one destination row), skip the appropriate number of
563 ** source rows and one destination row. The appropriate
564 ** number is what we do know (start_offset/cur_step) of
565 ** the new interval (*step/cur_step aka reduce_factor).
568 printf("start_offset: %lu end_offset: %lu\n",start_offset,end_offset);
569 printf("row_cnt before: %lu\n",row_cnt);
572 (*start) = (*start)-start_offset;
573 skiprows=reduce_factor-start_offset/cur_step;
574 srcptr+=skiprows* *ds_cnt;
575 for (col=0;col<(*ds_cnt);col++) *dstptr++ = DNAN;
579 printf("row_cnt between: %lu\n",row_cnt);
582 /* At the end we have some rows that are not going to be
583 ** used, the amount is end_offset/cur_step
586 (*end) = (*end)-end_offset+(*step);
587 skiprows = end_offset/cur_step;
591 printf("row_cnt after: %lu\n",row_cnt);
594 /* Sanity check: row_cnt should be multiple of reduce_factor */
595 /* if this gets triggered, something is REALLY WRONG ... we die immediately */
597 if (row_cnt%reduce_factor) {
598 printf("SANITY CHECK: %lu rows cannot be reduced by %i \n",
599 row_cnt,reduce_factor);
600 printf("BUG in reduce_data()\n");
604 /* Now combine reduce_factor intervals at a time
605 ** into one interval for the destination.
608 for (dst_row=0;(long int)row_cnt>=reduce_factor;dst_row++) {
609 for (col=0;col<(*ds_cnt);col++) {
610 rrd_value_t newval=DNAN;
611 unsigned long validval=0;
613 for (i=0;i<reduce_factor;i++) {
614 if (isnan(srcptr[i*(*ds_cnt)+col])) {
618 if (isnan(newval)) newval = srcptr[i*(*ds_cnt)+col];
626 newval += srcptr[i*(*ds_cnt)+col];
629 newval = min (newval,srcptr[i*(*ds_cnt)+col]);
632 /* an interval contains a failure if any subintervals contained a failure */
634 newval = max (newval,srcptr[i*(*ds_cnt)+col]);
637 newval = srcptr[i*(*ds_cnt)+col];
642 if (validval == 0){newval = DNAN;} else{
660 srcptr+=(*ds_cnt)*reduce_factor;
661 row_cnt-=reduce_factor;
663 /* If we had to alter the endtime, we didn't have enough
664 ** source rows to fill the last row. Fill it with NaN.
666 if (end_offset) for (col=0;col<(*ds_cnt);col++) *dstptr++ = DNAN;
668 row_cnt = ((*end)-(*start))/ *step;
670 printf("Done reducing. Currently %lu rows, time %lu to %lu, step %lu\n",
671 row_cnt,*start,*end,*step);
672 for (col=0;col<row_cnt;col++) {
673 printf("time %10lu: ",*start+(col+1)*(*step));
674 for (i=0;i<*ds_cnt;i++)
675 printf(" %8.2e",srcptr[*ds_cnt*col+i]);
682 /* get the data required for the graphs from the
686 data_fetch(image_desc_t *im )
691 /* pull the data from the log files ... */
692 for (i=0;i< (int)im->gdes_c;i++){
693 /* only GF_DEF elements fetch data */
694 if (im->gdes[i].gf != GF_DEF)
698 /* do we have it already ?*/
699 for (ii=0;ii<i;ii++) {
700 if (im->gdes[ii].gf != GF_DEF)
702 if ((strcmp(im->gdes[i].rrd, im->gdes[ii].rrd) == 0)
703 && (im->gdes[i].cf == im->gdes[ii].cf)
704 && (im->gdes[i].cf_reduce == im->gdes[ii].cf_reduce)
705 && (im->gdes[i].start == im->gdes[ii].start)
706 && (im->gdes[i].end == im->gdes[ii].end)
707 && (im->gdes[i].step == im->gdes[ii].step)) {
708 /* OK, the data is already there.
709 ** Just copy the header portion
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 im->gdes[i].ds_cnt = im->gdes[ii].ds_cnt;
715 im->gdes[i].ds_namv = im->gdes[ii].ds_namv;
716 im->gdes[i].data = im->gdes[ii].data;
717 im->gdes[i].data_first = 0;
724 unsigned long ft_step = im->gdes[i].step ;
726 if((rrd_fetch_fn(im->gdes[i].rrd,
732 &im->gdes[i].ds_namv,
733 &im->gdes[i].data)) == -1){
736 im->gdes[i].data_first = 1;
737 im->gdes[i].step = im->step;
739 if (ft_step < im->gdes[i].step) {
740 reduce_data(im->gdes[i].cf_reduce,
748 im->gdes[i].step = ft_step;
752 /* lets see if the required data source is really there */
753 for(ii=0;ii<(int)im->gdes[i].ds_cnt;ii++){
754 if(strcmp(im->gdes[i].ds_namv[ii],im->gdes[i].ds_nam) == 0){
757 if (im->gdes[i].ds== -1){
758 rrd_set_error("No DS called '%s' in '%s'",
759 im->gdes[i].ds_nam,im->gdes[i].rrd);
767 /* evaluate the expressions in the CDEF functions */
769 /*************************************************************
771 *************************************************************/
774 find_var_wrapper(void *arg1, char *key)
776 return find_var((image_desc_t *) arg1, key);
779 /* find gdes containing var*/
781 find_var(image_desc_t *im, char *key){
783 for(ii=0;ii<im->gdes_c-1;ii++){
784 if((im->gdes[ii].gf == GF_DEF
785 || im->gdes[ii].gf == GF_VDEF
786 || im->gdes[ii].gf == GF_CDEF)
787 && (strcmp(im->gdes[ii].vname,key) == 0)){
794 /* find the largest common denominator for all the numbers
795 in the 0 terminated num array */
800 for (i=0;num[i+1]!=0;i++){
802 rest=num[i] % num[i+1];
803 num[i]=num[i+1]; num[i+1]=rest;
807 /* return i==0?num[i]:num[i-1]; */
811 /* run the rpn calculator on all the VDEF and CDEF arguments */
813 data_calc( image_desc_t *im){
817 long *steparray, rpi;
822 rpnstack_init(&rpnstack);
824 for (gdi=0;gdi<im->gdes_c;gdi++){
825 /* Look for GF_VDEF and GF_CDEF in the same loop,
826 * so CDEFs can use VDEFs and vice versa
828 switch (im->gdes[gdi].gf) {
832 graph_desc_t *vdp = &im->gdes[im->gdes[gdi].vidx];
834 /* remove current shift */
835 vdp->start -= vdp->shift;
836 vdp->end -= vdp->shift;
839 if (im->gdes[gdi].shidx >= 0)
840 vdp->shift = im->gdes[im->gdes[gdi].shidx].vf.val;
843 vdp->shift = im->gdes[gdi].shval;
845 /* normalize shift to multiple of consolidated step */
846 vdp->shift = (vdp->shift / (long)vdp->step) * (long)vdp->step;
849 vdp->start += vdp->shift;
850 vdp->end += vdp->shift;
854 /* A VDEF has no DS. This also signals other parts
855 * of rrdtool that this is a VDEF value, not a CDEF.
857 im->gdes[gdi].ds_cnt = 0;
858 if (vdef_calc(im,gdi)) {
859 rrd_set_error("Error processing VDEF '%s'"
862 rpnstack_free(&rpnstack);
867 im->gdes[gdi].ds_cnt = 1;
868 im->gdes[gdi].ds = 0;
869 im->gdes[gdi].data_first = 1;
870 im->gdes[gdi].start = 0;
871 im->gdes[gdi].end = 0;
876 /* Find the variables in the expression.
877 * - VDEF variables are substituted by their values
878 * and the opcode is changed into OP_NUMBER.
879 * - CDEF variables are analized for their step size,
880 * the lowest common denominator of all the step
881 * sizes of the data sources involved is calculated
882 * and the resulting number is the step size for the
883 * resulting data source.
885 for(rpi=0;im->gdes[gdi].rpnp[rpi].op != OP_END;rpi++){
886 if(im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
887 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER){
888 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
889 if (im->gdes[ptr].ds_cnt == 0) { /* this is a VDEF data source */
891 printf("DEBUG: inside CDEF '%s' processing VDEF '%s'\n",
893 im->gdes[ptr].vname);
894 printf("DEBUG: value from vdef is %f\n",im->gdes[ptr].vf.val);
896 im->gdes[gdi].rpnp[rpi].val = im->gdes[ptr].vf.val;
897 im->gdes[gdi].rpnp[rpi].op = OP_NUMBER;
898 } else { /* normal variables and PREF(variables) */
900 /* add one entry to the array that keeps track of the step sizes of the
901 * data sources going into the CDEF. */
903 rrd_realloc(steparray,
904 (++stepcnt+1)*sizeof(*steparray)))==NULL){
905 rrd_set_error("realloc steparray");
906 rpnstack_free(&rpnstack);
910 steparray[stepcnt-1] = im->gdes[ptr].step;
912 /* adjust start and end of cdef (gdi) so
913 * that it runs from the latest start point
914 * to the earliest endpoint of any of the
915 * rras involved (ptr)
918 if(im->gdes[gdi].start < im->gdes[ptr].start)
919 im->gdes[gdi].start = im->gdes[ptr].start;
921 if(im->gdes[gdi].end == 0 ||
922 im->gdes[gdi].end > im->gdes[ptr].end)
923 im->gdes[gdi].end = im->gdes[ptr].end;
925 /* store pointer to the first element of
926 * the rra providing data for variable,
927 * further save step size and data source
930 im->gdes[gdi].rpnp[rpi].data = im->gdes[ptr].data + im->gdes[ptr].ds;
931 im->gdes[gdi].rpnp[rpi].step = im->gdes[ptr].step;
932 im->gdes[gdi].rpnp[rpi].ds_cnt = im->gdes[ptr].ds_cnt;
934 /* backoff the *.data ptr; this is done so
935 * rpncalc() function doesn't have to treat
936 * the first case differently
938 } /* if ds_cnt != 0 */
939 } /* if OP_VARIABLE */
940 } /* loop through all rpi */
942 /* move the data pointers to the correct period */
943 for(rpi=0;im->gdes[gdi].rpnp[rpi].op != OP_END;rpi++){
944 if(im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
945 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER){
946 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
947 long diff = im->gdes[gdi].start - im->gdes[ptr].start;
950 im->gdes[gdi].rpnp[rpi].data += (diff / im->gdes[ptr].step) * im->gdes[ptr].ds_cnt;
954 if(steparray == NULL){
955 rrd_set_error("rpn expressions without DEF"
956 " or CDEF variables are not supported");
957 rpnstack_free(&rpnstack);
960 steparray[stepcnt]=0;
961 /* Now find the resulting step. All steps in all
962 * used RRAs have to be visited
964 im->gdes[gdi].step = lcd(steparray);
966 if((im->gdes[gdi].data = malloc((
967 (im->gdes[gdi].end-im->gdes[gdi].start)
968 / im->gdes[gdi].step)
969 * sizeof(double)))==NULL){
970 rrd_set_error("malloc im->gdes[gdi].data");
971 rpnstack_free(&rpnstack);
975 /* Step through the new cdef results array and
976 * calculate the values
978 for (now = im->gdes[gdi].start + im->gdes[gdi].step;
979 now<=im->gdes[gdi].end;
980 now += im->gdes[gdi].step)
982 rpnp_t *rpnp = im -> gdes[gdi].rpnp;
984 /* 3rd arg of rpn_calc is for OP_VARIABLE lookups;
985 * in this case we are advancing by timesteps;
986 * we use the fact that time_t is a synonym for long
988 if (rpn_calc(rpnp,&rpnstack,(long) now,
989 im->gdes[gdi].data,++dataidx) == -1) {
990 /* rpn_calc sets the error string */
991 rpnstack_free(&rpnstack);
994 } /* enumerate over time steps within a CDEF */
999 } /* enumerate over CDEFs */
1000 rpnstack_free(&rpnstack);
1004 /* massage data so, that we get one value for each x coordinate in the graph */
1006 data_proc( image_desc_t *im ){
1008 double pixstep = (double)(im->end-im->start)
1009 /(double)im->xsize; /* how much time
1010 passes in one pixel */
1012 double minval=DNAN,maxval=DNAN;
1014 unsigned long gr_time;
1016 /* memory for the processed data */
1017 for(i=0;i<im->gdes_c;i++) {
1018 if((im->gdes[i].gf==GF_LINE) ||
1019 (im->gdes[i].gf==GF_AREA) ||
1020 (im->gdes[i].gf==GF_TICK) ||
1021 (im->gdes[i].gf==GF_STACK)) {
1022 if((im->gdes[i].p_data = malloc((im->xsize +1)
1023 * sizeof(rrd_value_t)))==NULL){
1024 rrd_set_error("malloc data_proc");
1030 for (i=0;i<im->xsize;i++) { /* for each pixel */
1032 gr_time = im->start+pixstep*i; /* time of the current step */
1035 for (ii=0;ii<im->gdes_c;ii++) {
1037 switch (im->gdes[ii].gf) {
1041 if (!im->gdes[ii].stack)
1044 value = im->gdes[ii].yrule;
1045 if (isnan(value) || (im->gdes[ii].gf == GF_TICK)) {
1046 /* The time of the data doesn't necessarily match
1047 ** the time of the graph. Beware.
1049 vidx = im->gdes[ii].vidx;
1050 if (im->gdes[vidx].gf == GF_VDEF) {
1051 value = im->gdes[vidx].vf.val;
1052 } else if (((long int)gr_time >= (long int)im->gdes[vidx].start) &&
1053 ((long int)gr_time <= (long int)im->gdes[vidx].end) ) {
1054 value = im->gdes[vidx].data[
1055 (unsigned long) floor(
1056 (double)(gr_time - im->gdes[vidx].start)
1057 / im->gdes[vidx].step)
1058 * im->gdes[vidx].ds_cnt
1066 if (! isnan(value)) {
1068 im->gdes[ii].p_data[i] = paintval;
1069 /* GF_TICK: the data values are not
1070 ** relevant for min and max
1072 if (finite(paintval) && im->gdes[ii].gf != GF_TICK ) {
1073 if (isnan(minval) || paintval < minval)
1075 if (isnan(maxval) || paintval > maxval)
1079 im->gdes[ii].p_data[i] = DNAN;
1088 /* if min or max have not been asigned a value this is because
1089 there was no data in the graph ... this is not good ...
1090 lets set these to dummy values then ... */
1092 if (isnan(minval)) minval = 0.0;
1093 if (isnan(maxval)) maxval = 1.0;
1095 /* adjust min and max values */
1096 if (isnan(im->minval)
1097 /* don't adjust low-end with log scale */
1098 || ((!im->logarithmic && !im->rigid) && im->minval > minval)
1100 im->minval = minval;
1101 if (isnan(im->maxval)
1102 || (!im->rigid && im->maxval < maxval)
1104 if (im->logarithmic)
1105 im->maxval = maxval * 1.1;
1107 im->maxval = maxval;
1109 /* make sure min is smaller than max */
1110 if (im->minval > im->maxval) {
1111 im->minval = 0.99 * im->maxval;
1114 /* make sure min and max are not equal */
1115 if (im->minval == im->maxval) {
1117 if (! im->logarithmic) {
1120 /* make sure min and max are not both zero */
1121 if (im->maxval == 0.0) {
1130 /* identify the point where the first gridline, label ... gets placed */
1134 time_t start, /* what is the initial time */
1135 enum tmt_en baseint, /* what is the basic interval */
1136 long basestep /* how many if these do we jump a time */
1140 localtime_r(&start, &tm);
1143 tm.tm_sec -= tm.tm_sec % basestep; break;
1146 tm.tm_min -= tm.tm_min % basestep;
1151 tm.tm_hour -= tm.tm_hour % basestep; break;
1153 /* we do NOT look at the basestep for this ... */
1156 tm.tm_hour = 0; break;
1158 /* we do NOT look at the basestep for this ... */
1162 tm.tm_mday -= tm.tm_wday -1; /* -1 because we want the monday */
1163 if (tm.tm_wday==0) tm.tm_mday -= 7; /* we want the *previous* monday */
1170 tm.tm_mon -= tm.tm_mon % basestep; break;
1178 tm.tm_year -= (tm.tm_year+1900) % basestep;
1183 /* identify the point where the next gridline, label ... gets placed */
1186 time_t current, /* what is the initial time */
1187 enum tmt_en baseint, /* what is the basic interval */
1188 long basestep /* how many if these do we jump a time */
1193 localtime_r(¤t, &tm);
1197 tm.tm_sec += basestep; break;
1199 tm.tm_min += basestep; break;
1201 tm.tm_hour += basestep; break;
1203 tm.tm_mday += basestep; break;
1205 tm.tm_mday += 7*basestep; break;
1207 tm.tm_mon += basestep; break;
1209 tm.tm_year += basestep;
1211 madetime = mktime(&tm);
1212 } while (madetime == -1); /* this is necessary to skip impssible times
1213 like the daylight saving time skips */
1219 /* calculate values required for PRINT and GPRINT functions */
1222 print_calc(image_desc_t *im, char ***prdata)
1224 long i,ii,validsteps;
1227 int graphelement = 0;
1230 double magfact = -1;
1234 if (im->imginfo) prlines++;
1235 for(i=0;i<im->gdes_c;i++){
1236 switch(im->gdes[i].gf){
1239 if(((*prdata) = rrd_realloc((*prdata),prlines*sizeof(char *)))==NULL){
1240 rrd_set_error("realloc prdata");
1244 /* PRINT and GPRINT can now print VDEF generated values.
1245 * There's no need to do any calculations on them as these
1246 * calculations were already made.
1248 vidx = im->gdes[i].vidx;
1249 if (im->gdes[vidx].gf==GF_VDEF) { /* simply use vals */
1250 printval = im->gdes[vidx].vf.val;
1251 printtime = im->gdes[vidx].vf.when;
1252 } else { /* need to calculate max,min,avg etcetera */
1253 max_ii =((im->gdes[vidx].end
1254 - im->gdes[vidx].start)
1255 / im->gdes[vidx].step
1256 * im->gdes[vidx].ds_cnt);
1259 for( ii=im->gdes[vidx].ds;
1261 ii+=im->gdes[vidx].ds_cnt){
1262 if (! finite(im->gdes[vidx].data[ii]))
1264 if (isnan(printval)){
1265 printval = im->gdes[vidx].data[ii];
1270 switch (im->gdes[i].cf){
1273 case CF_DEVSEASONAL:
1277 printval += im->gdes[vidx].data[ii];
1280 printval = min( printval, im->gdes[vidx].data[ii]);
1284 printval = max( printval, im->gdes[vidx].data[ii]);
1287 printval = im->gdes[vidx].data[ii];
1290 if (im->gdes[i].cf==CF_AVERAGE || im->gdes[i].cf > CF_LAST) {
1291 if (validsteps > 1) {
1292 printval = (printval / validsteps);
1295 } /* prepare printval */
1297 if (!strcmp(im->gdes[i].format,"%c")) { /* VDEF time print */
1298 char ctime_buf[128]; /* PS: for ctime_r, must be >= 26 chars */
1300 ctime_r(&printtime,ctime_buf);
1301 while(isprint(ctime_buf[iii])){iii++;}
1302 ctime_buf[iii]='\0';
1303 if (im->gdes[i].gf == GF_PRINT){
1304 (*prdata)[prlines-2] = malloc((FMT_LEG_LEN+2)*sizeof(char));
1305 sprintf((*prdata)[prlines-2],"%s (%lu)",ctime_buf,printtime);
1306 (*prdata)[prlines-1] = NULL;
1308 sprintf(im->gdes[i].legend,"%s (%lu)",ctime_buf,printtime);
1312 if ((percent_s = strstr(im->gdes[i].format,"%S")) != NULL) {
1313 /* Magfact is set to -1 upon entry to print_calc. If it
1314 * is still less than 0, then we need to run auto_scale.
1315 * Otherwise, put the value into the correct units. If
1316 * the value is 0, then do not set the symbol or magnification
1317 * so next the calculation will be performed again. */
1318 if (magfact < 0.0) {
1319 auto_scale(im,&printval,&si_symb,&magfact);
1320 if (printval == 0.0)
1323 printval /= magfact;
1325 *(++percent_s) = 's';
1326 } else if (strstr(im->gdes[i].format,"%s") != NULL) {
1327 auto_scale(im,&printval,&si_symb,&magfact);
1330 if (im->gdes[i].gf == GF_PRINT){
1331 (*prdata)[prlines-2] = malloc((FMT_LEG_LEN+2)*sizeof(char));
1332 (*prdata)[prlines-1] = NULL;
1333 if (bad_format(im->gdes[i].format)) {
1334 rrd_set_error("bad format for PRINT in '%s'", im->gdes[i].format);
1337 #ifdef HAVE_SNPRINTF
1338 snprintf((*prdata)[prlines-2],FMT_LEG_LEN,im->gdes[i].format,printval,si_symb);
1340 sprintf((*prdata)[prlines-2],im->gdes[i].format,printval,si_symb);
1345 if (bad_format(im->gdes[i].format)) {
1346 rrd_set_error("bad format for GPRINT in '%s'", im->gdes[i].format);
1349 #ifdef HAVE_SNPRINTF
1350 snprintf(im->gdes[i].legend,FMT_LEG_LEN-2,im->gdes[i].format,printval,si_symb);
1352 sprintf(im->gdes[i].legend,im->gdes[i].format,printval,si_symb);
1370 #ifdef WITH_PIECHART
1378 return graphelement;
1382 /* place legends with color spots */
1384 leg_place(image_desc_t *im)
1387 int interleg = im->text_prop[TEXT_PROP_LEGEND].size*2.0;
1388 int border = im->text_prop[TEXT_PROP_LEGEND].size*2.0;
1389 int fill=0, fill_last;
1391 int leg_x = border, leg_y = im->yimg;
1395 char prt_fctn; /*special printfunctions */
1398 if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
1399 if ((legspace = malloc(im->gdes_c*sizeof(int)))==NULL){
1400 rrd_set_error("malloc for legspace");
1404 for(i=0;i<im->gdes_c;i++){
1407 /* hid legends for rules which are not displayed */
1409 if(!(im->extra_flags & FORCE_RULES_LEGEND)) {
1410 if (im->gdes[i].gf == GF_HRULE &&
1411 (im->gdes[i].yrule < im->minval || im->gdes[i].yrule > im->maxval))
1412 im->gdes[i].legend[0] = '\0';
1414 if (im->gdes[i].gf == GF_VRULE &&
1415 (im->gdes[i].xrule < im->start || im->gdes[i].xrule > im->end))
1416 im->gdes[i].legend[0] = '\0';
1419 leg_cc = strlen(im->gdes[i].legend);
1421 /* is there a controle code ant the end of the legend string ? */
1422 /* and it is not a tab \\t */
1423 if (leg_cc >= 2 && im->gdes[i].legend[leg_cc-2] == '\\' && im->gdes[i].legend[leg_cc-1] != 't') {
1424 prt_fctn = im->gdes[i].legend[leg_cc-1];
1426 im->gdes[i].legend[leg_cc] = '\0';
1430 /* remove exess space */
1431 while (prt_fctn=='g' &&
1433 im->gdes[i].legend[leg_cc-1]==' '){
1435 im->gdes[i].legend[leg_cc]='\0';
1438 legspace[i]=(prt_fctn=='g' ? 0 : interleg);
1441 /* no interleg space if string ends in \g */
1442 fill += legspace[i];
1444 fill += gfx_get_text_width(im->canvas, fill+border,
1445 im->text_prop[TEXT_PROP_LEGEND].font,
1446 im->text_prop[TEXT_PROP_LEGEND].size,
1448 im->gdes[i].legend, 0);
1453 /* who said there was a special tag ... ?*/
1454 if (prt_fctn=='g') {
1457 if (prt_fctn == '\0') {
1458 if (i == im->gdes_c -1 ) prt_fctn ='l';
1460 /* is it time to place the legends ? */
1461 if (fill > im->ximg - 2*border){
1476 if (prt_fctn != '\0'){
1478 if (leg_c >= 2 && prt_fctn == 'j') {
1479 glue = (im->ximg - fill - 2* border) / (leg_c-1);
1483 if (prt_fctn =='c') leg_x = (im->ximg - fill) / 2.0;
1484 if (prt_fctn =='r') leg_x = im->ximg - fill - border;
1486 for(ii=mark;ii<=i;ii++){
1487 if(im->gdes[ii].legend[0]=='\0')
1488 continue; /* skip empty legends */
1489 im->gdes[ii].leg_x = leg_x;
1490 im->gdes[ii].leg_y = leg_y;
1492 gfx_get_text_width(im->canvas, leg_x,
1493 im->text_prop[TEXT_PROP_LEGEND].font,
1494 im->text_prop[TEXT_PROP_LEGEND].size,
1496 im->gdes[ii].legend, 0)
1500 leg_y += im->text_prop[TEXT_PROP_LEGEND].size*1.8;
1501 if (prt_fctn == 's') leg_y -= im->text_prop[TEXT_PROP_LEGEND].size;
1513 /* create a grid on the graph. it determines what to do
1514 from the values of xsize, start and end */
1516 /* the xaxis labels are determined from the number of seconds per pixel
1517 in the requested graph */
1522 calc_horizontal_grid(image_desc_t *im)
1528 int decimals, fractionals;
1530 im->ygrid_scale.labfact=2;
1532 range = im->maxval - im->minval;
1533 scaledrange = range / im->magfact;
1535 /* does the scale of this graph make it impossible to put lines
1536 on it? If so, give up. */
1537 if (isnan(scaledrange)) {
1541 /* find grid spaceing */
1543 if(isnan(im->ygridstep)){
1544 if(im->extra_flags & ALTYGRID) {
1545 /* find the value with max number of digits. Get number of digits */
1546 decimals = ceil(log10(max(fabs(im->maxval), fabs(im->minval))*im->viewfactor/im->magfact));
1547 if(decimals <= 0) /* everything is small. make place for zero */
1550 im->ygrid_scale.gridstep = pow((double)10, floor(log10(range*im->viewfactor/im->magfact)))/im->viewfactor*im->magfact;
1552 if(im->ygrid_scale.gridstep == 0) /* range is one -> 0.1 is reasonable scale */
1553 im->ygrid_scale.gridstep = 0.1;
1554 /* should have at least 5 lines but no more then 15 */
1555 if(range/im->ygrid_scale.gridstep < 5)
1556 im->ygrid_scale.gridstep /= 10;
1557 if(range/im->ygrid_scale.gridstep > 15)
1558 im->ygrid_scale.gridstep *= 10;
1559 if(range/im->ygrid_scale.gridstep > 5) {
1560 im->ygrid_scale.labfact = 1;
1561 if(range/im->ygrid_scale.gridstep > 8)
1562 im->ygrid_scale.labfact = 2;
1565 im->ygrid_scale.gridstep /= 5;
1566 im->ygrid_scale.labfact = 5;
1568 fractionals = floor(log10(im->ygrid_scale.gridstep*(double)im->ygrid_scale.labfact*im->viewfactor/im->magfact));
1569 if(fractionals < 0) { /* small amplitude. */
1570 int len = decimals - fractionals + 1;
1571 if (im->unitslength < len+2) im->unitslength = len+2;
1572 sprintf(im->ygrid_scale.labfmt, "%%%d.%df%s", len, -fractionals,(im->symbol != ' ' ? " %c" : ""));
1574 int len = decimals + 1;
1575 if (im->unitslength < len+2) im->unitslength = len+2;
1576 sprintf(im->ygrid_scale.labfmt, "%%%d.0f%s", len, ( im->symbol != ' ' ? " %c" : "" ));
1580 for(i=0;ylab[i].grid > 0;i++){
1581 pixel = im->ysize / (scaledrange / ylab[i].grid);
1589 if (pixel * ylab[gridind].lfac[i] >= 2.5 * im->text_prop[TEXT_PROP_AXIS].size) {
1590 im->ygrid_scale.labfact = ylab[gridind].lfac[i];
1595 im->ygrid_scale.gridstep = ylab[gridind].grid * im->magfact;
1598 im->ygrid_scale.gridstep = im->ygridstep;
1599 im->ygrid_scale.labfact = im->ylabfact;
1604 int draw_horizontal_grid(image_desc_t *im)
1608 char graph_label[100];
1609 double X0=im->xorigin;
1610 double X1=im->xorigin+im->xsize;
1612 int sgrid = (int)( im->minval / im->ygrid_scale.gridstep - 1);
1613 int egrid = (int)( im->maxval / im->ygrid_scale.gridstep + 1);
1615 scaledstep = im->ygrid_scale.gridstep/(double)im->magfact*(double)im->viewfactor;
1616 MaxY = scaledstep*(double)egrid;
1617 for (i = sgrid; i <= egrid; i++){
1618 double Y0=ytr(im,im->ygrid_scale.gridstep*i);
1619 if ( Y0 >= im->yorigin-im->ysize
1620 && Y0 <= im->yorigin){
1621 if(i % im->ygrid_scale.labfact == 0){
1622 if (im->symbol == ' ') {
1623 if(im->extra_flags & ALTYGRID) {
1624 sprintf(graph_label,im->ygrid_scale.labfmt,scaledstep*(double)i);
1627 sprintf(graph_label,"%4.1f",scaledstep*(double)i);
1629 sprintf(graph_label,"%4.0f",scaledstep*(double)i);
1633 char sisym = ( i == 0 ? ' ' : im->symbol);
1634 if(im->extra_flags & ALTYGRID) {
1635 sprintf(graph_label,im->ygrid_scale.labfmt,scaledstep*(double)i,sisym);
1638 sprintf(graph_label,"%4.1f %c",scaledstep*(double)i, sisym);
1640 sprintf(graph_label,"%4.0f %c",scaledstep*(double)i, sisym);
1645 gfx_new_text ( im->canvas,
1646 X0-im->text_prop[TEXT_PROP_AXIS].size, Y0,
1647 im->graph_col[GRC_FONT],
1648 im->text_prop[TEXT_PROP_AXIS].font,
1649 im->text_prop[TEXT_PROP_AXIS].size,
1650 im->tabwidth, 0.0, GFX_H_RIGHT, GFX_V_CENTER,
1652 gfx_new_dashed_line ( im->canvas,
1655 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1656 im->grid_dash_on, im->grid_dash_off);
1658 } else if (!(im->extra_flags & NOMINOR)) {
1659 gfx_new_dashed_line ( im->canvas,
1662 GRIDWIDTH, im->graph_col[GRC_GRID],
1663 im->grid_dash_on, im->grid_dash_off);
1671 /* logaritmic horizontal grid */
1673 horizontal_log_grid(image_desc_t *im)
1677 int minoridx=0, majoridx=0;
1678 char graph_label[100];
1680 double value, pixperstep, minstep;
1682 /* find grid spaceing */
1683 pixpex= (double)im->ysize / (log10(im->maxval) - log10(im->minval));
1685 if (isnan(pixpex)) {
1689 for(i=0;yloglab[i][0] > 0;i++){
1690 minstep = log10(yloglab[i][0]);
1691 for(ii=1;yloglab[i][ii+1] > 0;ii++){
1692 if(yloglab[i][ii+2]==0){
1693 minstep = log10(yloglab[i][ii+1])-log10(yloglab[i][ii]);
1697 pixperstep = pixpex * minstep;
1698 if(pixperstep > 5){minoridx = i;}
1699 if(pixperstep > 2 * im->text_prop[TEXT_PROP_LEGEND].size){majoridx = i;}
1703 X1=im->xorigin+im->xsize;
1704 /* paint minor grid */
1705 for (value = pow((double)10, log10(im->minval)
1706 - fmod(log10(im->minval),log10(yloglab[minoridx][0])));
1707 value <= im->maxval;
1708 value *= yloglab[minoridx][0]){
1709 if (value < im->minval) continue;
1711 while(yloglab[minoridx][++i] > 0){
1712 Y0 = ytr(im,value * yloglab[minoridx][i]);
1713 if (Y0 <= im->yorigin - im->ysize) break;
1714 gfx_new_dashed_line ( im->canvas,
1717 GRIDWIDTH, im->graph_col[GRC_GRID],
1718 im->grid_dash_on, im->grid_dash_off);
1722 /* paint major grid and labels*/
1723 for (value = pow((double)10, log10(im->minval)
1724 - fmod(log10(im->minval),log10(yloglab[majoridx][0])));
1725 value <= im->maxval;
1726 value *= yloglab[majoridx][0]){
1727 if (value < im->minval) continue;
1729 while(yloglab[majoridx][++i] > 0){
1730 Y0 = ytr(im,value * yloglab[majoridx][i]);
1731 if (Y0 <= im->yorigin - im->ysize) break;
1732 gfx_new_dashed_line ( im->canvas,
1735 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1736 im->grid_dash_on, im->grid_dash_off);
1738 sprintf(graph_label,"%3.0e",value * yloglab[majoridx][i]);
1739 gfx_new_text ( im->canvas,
1740 X0-im->text_prop[TEXT_PROP_AXIS].size, Y0,
1741 im->graph_col[GRC_FONT],
1742 im->text_prop[TEXT_PROP_AXIS].font,
1743 im->text_prop[TEXT_PROP_AXIS].size,
1744 im->tabwidth,0.0, GFX_H_RIGHT, GFX_V_CENTER,
1756 int xlab_sel; /* which sort of label and grid ? */
1757 time_t ti, tilab, timajor;
1759 char graph_label[100];
1760 double X0,Y0,Y1; /* points for filled graph and more*/
1763 /* the type of time grid is determined by finding
1764 the number of seconds per pixel in the graph */
1767 if(im->xlab_user.minsec == -1){
1768 factor=(im->end - im->start)/im->xsize;
1770 while ( xlab[xlab_sel+1].minsec != -1
1771 && xlab[xlab_sel+1].minsec <= factor){ xlab_sel++; }
1772 im->xlab_user.gridtm = xlab[xlab_sel].gridtm;
1773 im->xlab_user.gridst = xlab[xlab_sel].gridst;
1774 im->xlab_user.mgridtm = xlab[xlab_sel].mgridtm;
1775 im->xlab_user.mgridst = xlab[xlab_sel].mgridst;
1776 im->xlab_user.labtm = xlab[xlab_sel].labtm;
1777 im->xlab_user.labst = xlab[xlab_sel].labst;
1778 im->xlab_user.precis = xlab[xlab_sel].precis;
1779 im->xlab_user.stst = xlab[xlab_sel].stst;
1782 /* y coords are the same for every line ... */
1784 Y1 = im->yorigin-im->ysize;
1787 /* paint the minor grid */
1788 if (!(im->extra_flags & NOMINOR))
1790 for(ti = find_first_time(im->start,
1791 im->xlab_user.gridtm,
1792 im->xlab_user.gridst),
1793 timajor = find_first_time(im->start,
1794 im->xlab_user.mgridtm,
1795 im->xlab_user.mgridst);
1797 ti = find_next_time(ti,im->xlab_user.gridtm,im->xlab_user.gridst)
1799 /* are we inside the graph ? */
1800 if (ti < im->start || ti > im->end) continue;
1801 while (timajor < ti) {
1802 timajor = find_next_time(timajor,
1803 im->xlab_user.mgridtm, im->xlab_user.mgridst);
1805 if (ti == timajor) continue; /* skip as falls on major grid line */
1807 gfx_new_dashed_line(im->canvas,X0,Y0+1, X0,Y1-1,GRIDWIDTH,
1808 im->graph_col[GRC_GRID],
1809 im->grid_dash_on, im->grid_dash_off);
1814 /* paint the major grid */
1815 for(ti = find_first_time(im->start,
1816 im->xlab_user.mgridtm,
1817 im->xlab_user.mgridst);
1819 ti = find_next_time(ti,im->xlab_user.mgridtm,im->xlab_user.mgridst)
1821 /* are we inside the graph ? */
1822 if (ti < im->start || ti > im->end) continue;
1824 gfx_new_dashed_line(im->canvas,X0,Y0+3, X0,Y1-2,MGRIDWIDTH,
1825 im->graph_col[GRC_MGRID],
1826 im->grid_dash_on, im->grid_dash_off);
1829 /* paint the labels below the graph */
1830 for(ti = find_first_time(im->start - im->xlab_user.precis/2,
1831 im->xlab_user.labtm,
1832 im->xlab_user.labst);
1833 ti <= im->end - im->xlab_user.precis/2;
1834 ti = find_next_time(ti,im->xlab_user.labtm,im->xlab_user.labst)
1836 tilab= ti + im->xlab_user.precis/2; /* correct time for the label */
1837 /* are we inside the graph ? */
1838 if (tilab < im->start || tilab > im->end) continue;
1841 localtime_r(&tilab, &tm);
1842 strftime(graph_label,99,im->xlab_user.stst, &tm);
1844 # error "your libc has no strftime I guess we'll abort the exercise here."
1846 gfx_new_text ( im->canvas,
1847 xtr(im,tilab), Y0+im->text_prop[TEXT_PROP_AXIS].size*1.4+5,
1848 im->graph_col[GRC_FONT],
1849 im->text_prop[TEXT_PROP_AXIS].font,
1850 im->text_prop[TEXT_PROP_AXIS].size,
1851 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_BOTTOM,
1864 /* draw x and y axis */
1865 /* gfx_new_line ( im->canvas, im->xorigin+im->xsize,im->yorigin,
1866 im->xorigin+im->xsize,im->yorigin-im->ysize,
1867 GRIDWIDTH, im->graph_col[GRC_AXIS]);
1869 gfx_new_line ( im->canvas, im->xorigin,im->yorigin-im->ysize,
1870 im->xorigin+im->xsize,im->yorigin-im->ysize,
1871 GRIDWIDTH, im->graph_col[GRC_AXIS]); */
1873 gfx_new_line ( im->canvas, im->xorigin-4,im->yorigin,
1874 im->xorigin+im->xsize+4,im->yorigin,
1875 MGRIDWIDTH, im->graph_col[GRC_AXIS]);
1877 gfx_new_line ( im->canvas, im->xorigin,im->yorigin+4,
1878 im->xorigin,im->yorigin-im->ysize-4,
1879 MGRIDWIDTH, im->graph_col[GRC_AXIS]);
1882 /* arrow for X and Y axis direction */
1883 gfx_new_area ( im->canvas,
1884 im->xorigin+im->xsize+2, im->yorigin-2,
1885 im->xorigin+im->xsize+2, im->yorigin+3,
1886 im->xorigin+im->xsize+7, im->yorigin+0.5, /* LINEOFFSET */
1887 im->graph_col[GRC_ARROW]);
1889 gfx_new_area ( im->canvas,
1890 im->xorigin-2, im->yorigin-im->ysize-2,
1891 im->xorigin+3, im->yorigin-im->ysize-2,
1892 im->xorigin+0.5, im->yorigin-im->ysize-7, /* LINEOFFSET */
1893 im->graph_col[GRC_ARROW]);
1898 grid_paint(image_desc_t *im)
1902 double X0,Y0; /* points for filled graph and more*/
1905 /* draw 3d border */
1906 node = gfx_new_area (im->canvas, 0,im->yimg,
1908 2,2,im->graph_col[GRC_SHADEA]);
1909 gfx_add_point( node , im->ximg - 2, 2 );
1910 gfx_add_point( node , im->ximg, 0 );
1911 gfx_add_point( node , 0,0 );
1912 /* gfx_add_point( node , 0,im->yimg ); */
1914 node = gfx_new_area (im->canvas, 2,im->yimg-2,
1915 im->ximg-2,im->yimg-2,
1917 im->graph_col[GRC_SHADEB]);
1918 gfx_add_point( node , im->ximg,0);
1919 gfx_add_point( node , im->ximg,im->yimg);
1920 gfx_add_point( node , 0,im->yimg);
1921 /* gfx_add_point( node , 0,im->yimg ); */
1924 if (im->draw_x_grid == 1 )
1927 if (im->draw_y_grid == 1){
1928 if(im->logarithmic){
1929 res = horizontal_log_grid(im);
1931 res = draw_horizontal_grid(im);
1934 /* dont draw horizontal grid if there is no min and max val */
1936 char *nodata = "No Data found";
1937 gfx_new_text(im->canvas,im->ximg/2, (2*im->yorigin-im->ysize) / 2,
1938 im->graph_col[GRC_FONT],
1939 im->text_prop[TEXT_PROP_AXIS].font,
1940 im->text_prop[TEXT_PROP_AXIS].size,
1941 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_CENTER,
1946 /* yaxis unit description */
1947 gfx_new_text( im->canvas,
1948 10, (im->yorigin - im->ysize/2),
1949 im->graph_col[GRC_FONT],
1950 im->text_prop[TEXT_PROP_UNIT].font,
1951 im->text_prop[TEXT_PROP_UNIT].size, im->tabwidth,
1952 RRDGRAPH_YLEGEND_ANGLE,
1953 GFX_H_LEFT, GFX_V_CENTER,
1957 gfx_new_text( im->canvas,
1958 im->ximg/2, im->text_prop[TEXT_PROP_TITLE].size*1.3+4,
1959 im->graph_col[GRC_FONT],
1960 im->text_prop[TEXT_PROP_TITLE].font,
1961 im->text_prop[TEXT_PROP_TITLE].size, im->tabwidth, 0.0,
1962 GFX_H_CENTER, GFX_V_CENTER,
1964 /* rrdtool 'logo' */
1965 gfx_new_text( im->canvas,
1967 ( im->graph_col[GRC_FONT] & 0xffffff00 ) | 0x00000044,
1968 im->text_prop[TEXT_PROP_AXIS].font,
1969 5.5, im->tabwidth, 270,
1970 GFX_H_RIGHT, GFX_V_TOP,
1971 "RRDTOOL / TOBI OETIKER");
1974 if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
1975 for(i=0;i<im->gdes_c;i++){
1976 if(im->gdes[i].legend[0] =='\0')
1979 /* im->gdes[i].leg_y is the bottom of the legend */
1980 X0 = im->gdes[i].leg_x;
1981 Y0 = im->gdes[i].leg_y;
1982 gfx_new_text ( im->canvas, X0, Y0,
1983 im->graph_col[GRC_FONT],
1984 im->text_prop[TEXT_PROP_LEGEND].font,
1985 im->text_prop[TEXT_PROP_LEGEND].size,
1986 im->tabwidth,0.0, GFX_H_LEFT, GFX_V_BOTTOM,
1987 im->gdes[i].legend );
1988 /* The legend for GRAPH items starts with "M " to have
1989 enough space for the box */
1990 if ( im->gdes[i].gf != GF_PRINT &&
1991 im->gdes[i].gf != GF_GPRINT &&
1992 im->gdes[i].gf != GF_COMMENT) {
1995 boxH = gfx_get_text_width(im->canvas, 0,
1996 im->text_prop[TEXT_PROP_LEGEND].font,
1997 im->text_prop[TEXT_PROP_LEGEND].size,
1998 im->tabwidth,"o", 0) * 1.2;
2001 /* make sure transparent colors show up the same way as in the graph */
2002 node = gfx_new_area(im->canvas,
2006 im->graph_col[GRC_BACK]);
2007 gfx_add_point ( node, X0+boxH, Y0-boxV );
2009 node = gfx_new_area(im->canvas,
2014 gfx_add_point ( node, X0+boxH, Y0-boxV );
2015 node = gfx_new_line(im->canvas,
2018 1.0,im->graph_col[GRC_FRAME]);
2019 gfx_add_point(node,X0+boxH,Y0);
2020 gfx_add_point(node,X0+boxH,Y0-boxV);
2021 gfx_close_path(node);
2028 /*****************************************************
2029 * lazy check make sure we rely need to create this graph
2030 *****************************************************/
2032 int lazy_check(image_desc_t *im){
2035 struct stat imgstat;
2037 if (im->lazy == 0) return 0; /* no lazy option */
2038 if (stat(im->graphfile,&imgstat) != 0)
2039 return 0; /* can't stat */
2040 /* one pixel in the existing graph is more then what we would
2042 if (time(NULL) - imgstat.st_mtime >
2043 (im->end - im->start) / im->xsize)
2045 if ((fd = fopen(im->graphfile,"rb")) == NULL)
2046 return 0; /* the file does not exist */
2047 switch (im->canvas->imgformat) {
2049 size = PngSize(fd,&(im->ximg),&(im->yimg));
2058 #ifdef WITH_PIECHART
2060 pie_part(image_desc_t *im, gfx_color_t color,
2061 double PieCenterX, double PieCenterY, double Radius,
2062 double startangle, double endangle)
2066 double step=M_PI/50; /* Number of iterations for the circle;
2067 ** 10 is definitely too low, more than
2068 ** 50 seems to be overkill
2071 /* Strange but true: we have to work clockwise or else
2072 ** anti aliasing nor transparency don't work.
2074 ** This test is here to make sure we do it right, also
2075 ** this makes the for...next loop more easy to implement.
2076 ** The return will occur if the user enters a negative number
2077 ** (which shouldn't be done according to the specs) or if the
2078 ** programmers do something wrong (which, as we all know, never
2079 ** happens anyway :)
2081 if (endangle<startangle) return;
2083 /* Hidden feature: Radius decreases each full circle */
2085 while (angle>=2*M_PI) {
2090 node=gfx_new_area(im->canvas,
2091 PieCenterX+sin(startangle)*Radius,
2092 PieCenterY-cos(startangle)*Radius,
2095 PieCenterX+sin(endangle)*Radius,
2096 PieCenterY-cos(endangle)*Radius,
2098 for (angle=endangle;angle-startangle>=step;angle-=step) {
2100 PieCenterX+sin(angle)*Radius,
2101 PieCenterY-cos(angle)*Radius );
2108 graph_size_location(image_desc_t *im, int elements
2110 #ifdef WITH_PIECHART
2116 /* The actual size of the image to draw is determined from
2117 ** several sources. The size given on the command line is
2118 ** the graph area but we need more as we have to draw labels
2119 ** and other things outside the graph area
2122 /* +-+-------------------------------------------+
2123 ** |l|.................title.....................|
2124 ** |e+--+-------------------------------+--------+
2127 ** |l| l| main graph area | chart |
2130 ** |r+--+-------------------------------+--------+
2131 ** |e| | x-axis labels | |
2132 ** |v+--+-------------------------------+--------+
2133 ** | |..............legends......................|
2134 ** +-+-------------------------------------------+
2140 #ifdef WITH_PIECHART
2145 Xlegend =0, Ylegend =0,
2147 Xspacing =15, Yspacing =15;
2149 if (im->extra_flags & ONLY_GRAPH) {
2151 im->ximg = im->xsize;
2152 im->yimg = im->ysize;
2153 im->yorigin = im->ysize;
2158 if (im->ylegend[0] != '\0' ) {
2159 Xvertical = im->text_prop[TEXT_PROP_UNIT].size *2;
2163 if (im->title[0] != '\0') {
2164 /* The title is placed "inbetween" two text lines so it
2165 ** automatically has some vertical spacing. The horizontal
2166 ** spacing is added here, on each side.
2168 /* don't care for the with of the title
2169 Xtitle = gfx_get_text_width(im->canvas, 0,
2170 im->text_prop[TEXT_PROP_TITLE].font,
2171 im->text_prop[TEXT_PROP_TITLE].size,
2173 im->title, 0) + 2*Xspacing; */
2174 Ytitle = im->text_prop[TEXT_PROP_TITLE].size*2.6+10;
2180 if (im->draw_x_grid) {
2181 Yxlabel=im->text_prop[TEXT_PROP_AXIS].size *2.5;
2183 if (im->draw_y_grid) {
2184 Xylabel=gfx_get_text_width(im->canvas, 0,
2185 im->text_prop[TEXT_PROP_AXIS].font,
2186 im->text_prop[TEXT_PROP_AXIS].size,
2188 "0", 0) * im->unitslength;
2192 #ifdef WITH_PIECHART
2194 im->piesize=im->xsize<im->ysize?im->xsize:im->ysize;
2200 /* Now calculate the total size. Insert some spacing where
2201 desired. im->xorigin and im->yorigin need to correspond
2202 with the lower left corner of the main graph area or, if
2203 this one is not set, the imaginary box surrounding the
2206 /* The legend width cannot yet be determined, as a result we
2207 ** have problems adjusting the image to it. For now, we just
2208 ** forget about it at all; the legend will have to fit in the
2209 ** size already allocated.
2211 im->ximg = Xylabel + Xmain + 2 * Xspacing;
2213 #ifdef WITH_PIECHART
2217 if (Xmain) im->ximg += Xspacing;
2218 #ifdef WITH_PIECHART
2219 if (Xpie) im->ximg += Xspacing;
2222 im->xorigin = Xspacing + Xylabel;
2224 /* the length of the title should not influence with width of the graph
2225 if (Xtitle > im->ximg) im->ximg = Xtitle; */
2227 if (Xvertical) { /* unit description */
2228 im->ximg += Xvertical;
2229 im->xorigin += Xvertical;
2233 /* The vertical size is interesting... we need to compare
2234 ** the sum of {Ytitle, Ymain, Yxlabel, Ylegend} with Yvertical
2235 ** however we need to know {Ytitle+Ymain+Yxlabel} in order to
2236 ** start even thinking about Ylegend.
2238 ** Do it in three portions: First calculate the inner part,
2239 ** then do the legend, then adjust the total height of the img.
2242 /* reserve space for main and/or pie */
2244 im->yimg = Ymain + Yxlabel;
2246 #ifdef WITH_PIECHART
2247 if (im->yimg < Ypie) im->yimg = Ypie;
2250 im->yorigin = im->yimg - Yxlabel;
2252 /* reserve space for the title *or* some padding above the graph */
2255 im->yorigin += Ytitle;
2257 im->yimg += 1.5*Yspacing;
2258 im->yorigin += 1.5*Yspacing;
2260 /* reserve space for padding below the graph */
2261 im->yimg += Yspacing;
2263 /* Determine where to place the legends onto the image.
2264 ** Adjust im->yimg to match the space requirements.
2266 if(leg_place(im)==-1)
2271 if (Xlegend > im->ximg) {
2273 /* reposition Pie */
2277 #ifdef WITH_PIECHART
2278 /* The pie is placed in the upper right hand corner,
2279 ** just below the title (if any) and with sufficient
2283 im->pie_x = im->ximg - Xspacing - Xpie/2;
2284 im->pie_y = im->yorigin-Ymain+Ypie/2;
2286 im->pie_x = im->ximg/2;
2287 im->pie_y = im->yorigin-Ypie/2;
2295 /* draw that picture thing ... */
2297 graph_paint(image_desc_t *im, char ***calcpr)
2300 int lazy = lazy_check(im);
2301 #ifdef WITH_PIECHART
2303 double PieStart=0.0;
2308 double areazero = 0.0;
2309 enum gf_en stack_gf = GF_PRINT;
2310 graph_desc_t *lastgdes = NULL;
2312 /* if we are lazy and there is nothing to PRINT ... quit now */
2313 if (lazy && im->prt_c==0) return 0;
2315 /* pull the data from the rrd files ... */
2317 if(data_fetch(im)==-1)
2320 /* evaluate VDEF and CDEF operations ... */
2321 if(data_calc(im)==-1)
2324 #ifdef WITH_PIECHART
2325 /* check if we need to draw a piechart */
2326 for(i=0;i<im->gdes_c;i++){
2327 if (im->gdes[i].gf == GF_PART) {
2334 /* calculate and PRINT and GPRINT definitions. We have to do it at
2335 * this point because it will affect the length of the legends
2336 * if there are no graph elements we stop here ...
2337 * if we are lazy, try to quit ...
2339 i=print_calc(im,calcpr);
2342 #ifdef WITH_PIECHART
2345 ) || lazy) return 0;
2347 #ifdef WITH_PIECHART
2348 /* If there's only the pie chart to draw, signal this */
2349 if (i==0) piechart=2;
2352 /* get actual drawing data and find min and max values*/
2353 if(data_proc(im)==-1)
2356 if(!im->logarithmic){si_unit(im);} /* identify si magnitude Kilo, Mega Giga ? */
2358 if(!im->rigid && ! im->logarithmic)
2359 expand_range(im); /* make sure the upper and lower limit are
2362 if (!calc_horizontal_grid(im))
2369 /**************************************************************
2370 *** Calculating sizes and locations became a bit confusing ***
2371 *** so I moved this into a separate function. ***
2372 **************************************************************/
2373 if(graph_size_location(im,i
2374 #ifdef WITH_PIECHART
2380 /* the actual graph is created by going through the individual
2381 graph elements and then drawing them */
2383 node=gfx_new_area ( im->canvas,
2387 im->graph_col[GRC_BACK]);
2389 gfx_add_point(node,im->ximg, 0);
2391 #ifdef WITH_PIECHART
2392 if (piechart != 2) {
2394 node=gfx_new_area ( im->canvas,
2395 im->xorigin, im->yorigin,
2396 im->xorigin + im->xsize, im->yorigin,
2397 im->xorigin + im->xsize, im->yorigin-im->ysize,
2398 im->graph_col[GRC_CANVAS]);
2400 gfx_add_point(node,im->xorigin, im->yorigin - im->ysize);
2402 if (im->minval > 0.0)
2403 areazero = im->minval;
2404 if (im->maxval < 0.0)
2405 areazero = im->maxval;
2406 #ifdef WITH_PIECHART
2410 #ifdef WITH_PIECHART
2412 pie_part(im,im->graph_col[GRC_CANVAS],im->pie_x,im->pie_y,im->piesize*0.5,0,2*M_PI);
2416 for(i=0;i<im->gdes_c;i++){
2417 switch(im->gdes[i].gf){
2430 for (ii = 0; ii < im->xsize; ii++)
2432 if (!isnan(im->gdes[i].p_data[ii]) &&
2433 im->gdes[i].p_data[ii] > 0.0)
2435 /* generate a tick */
2436 gfx_new_line(im->canvas, im -> xorigin + ii,
2437 im -> yorigin - (im -> gdes[i].yrule * im -> ysize),
2441 im -> gdes[i].col );
2447 stack_gf = im->gdes[i].gf;
2449 /* fix data points at oo and -oo */
2450 for(ii=0;ii<im->xsize;ii++){
2451 if (isinf(im->gdes[i].p_data[ii])){
2452 if (im->gdes[i].p_data[ii] > 0) {
2453 im->gdes[i].p_data[ii] = im->maxval ;
2455 im->gdes[i].p_data[ii] = im->minval ;
2461 /* *******************************************************
2466 -------|--t-1--t--------------------------------
2468 if we know the value at time t was a then
2469 we draw a square from t-1 to t with the value a.
2471 ********************************************************* */
2472 if (im->gdes[i].col != 0x0){
2473 /* GF_LINE and friend */
2474 if(stack_gf == GF_LINE ){
2477 for(ii=1;ii<im->xsize;ii++){
2478 if (isnan(im->gdes[i].p_data[ii]) || (im->slopemode==1 && isnan(im->gdes[i].p_data[ii-1]))){
2482 if ( node == NULL ) {
2483 last_y = ytr(im,im->gdes[i].p_data[ii]);
2484 if ( im->slopemode == 0 ){
2485 node = gfx_new_line(im->canvas,
2486 ii-1+im->xorigin,last_y,
2487 ii+im->xorigin,last_y,
2488 im->gdes[i].linewidth,
2491 node = gfx_new_line(im->canvas,
2492 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii-1]),
2493 ii+im->xorigin,last_y,
2494 im->gdes[i].linewidth,
2498 double new_y = ytr(im,im->gdes[i].p_data[ii]);
2499 if ( im->slopemode==0 && new_y != last_y){
2500 gfx_add_point(node,ii-1+im->xorigin,new_y);
2503 gfx_add_point(node,ii+im->xorigin,new_y);
2509 double *foreY=malloc(sizeof(double)*im->xsize*2);
2510 double *foreX=malloc(sizeof(double)*im->xsize*2);
2511 double *backY=malloc(sizeof(double)*im->xsize*2);
2512 double *backX=malloc(sizeof(double)*im->xsize*2);
2514 for(ii=0;ii<=im->xsize;ii++){
2516 if ( idxI > 0 && ( drawem != 0 || ii==im->xsize)){
2519 while (cntI < idxI && foreY[lastI] == foreY[cntI] && foreY[lastI] == foreY[cntI+1]){cntI++;}
2520 node = gfx_new_area(im->canvas,
2523 foreX[cntI],foreY[cntI], im->gdes[i].col);
2524 while (cntI < idxI) {
2527 while ( cntI < idxI && foreY[lastI] == foreY[cntI] && foreY[lastI] == foreY[cntI+1]){cntI++;}
2528 gfx_add_point(node,foreX[cntI],foreY[cntI]);
2530 gfx_add_point(node,backX[idxI],backY[idxI]);
2534 while ( idxI > 1 && backY[lastI] == backY[idxI] && backY[lastI] == backY[idxI-1]){idxI--;}
2535 gfx_add_point(node,backX[idxI],backY[idxI]);
2544 if (ii == im->xsize) break;
2546 /* keep things simple for now, just draw these bars
2547 do not try to build a big and complex area */
2550 if ( im->slopemode == 0 && ii==0){
2553 if ( isnan(im->gdes[i].p_data[ii]) ) {
2557 ytop = ytr(im,im->gdes[i].p_data[ii]);
2558 if ( lastgdes && im->gdes[i].stack ) {
2559 ybase = ytr(im,lastgdes->p_data[ii]);
2561 ybase = ytr(im,areazero);
2563 if ( ybase == ytop ){
2567 /* every area has to be wound clock-wise,
2568 so we have to make sur base remains base */
2570 double extra = ytop;
2574 if ( im->slopemode == 0 ){
2575 backY[++idxI] = ybase-0.2;
2576 backX[idxI] = ii+im->xorigin-1;
2577 foreY[idxI] = ytop+0.2;
2578 foreX[idxI] = ii+im->xorigin-1;
2580 backY[++idxI] = ybase-0.2;
2581 backX[idxI] = ii+im->xorigin;
2582 foreY[idxI] = ytop+0.2;
2583 foreX[idxI] = ii+im->xorigin;
2585 /* close up any remaining area */
2590 } /* else GF_LINE */
2591 } /* if color != 0x0 */
2592 /* make sure we do not run into trouble when stacking on NaN */
2593 for(ii=0;ii<im->xsize;ii++){
2594 if (isnan(im->gdes[i].p_data[ii])) {
2595 if (lastgdes && (im->gdes[i].stack)) {
2596 im->gdes[i].p_data[ii] = lastgdes->p_data[ii];
2598 im->gdes[i].p_data[ii] = areazero;
2602 lastgdes = &(im->gdes[i]);
2604 #ifdef WITH_PIECHART
2606 if(isnan(im->gdes[i].yrule)) /* fetch variable */
2607 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2609 if (finite(im->gdes[i].yrule)) { /* even the fetched var can be NaN */
2610 pie_part(im,im->gdes[i].col,
2611 im->pie_x,im->pie_y,im->piesize*0.4,
2612 M_PI*2.0*PieStart/100.0,
2613 M_PI*2.0*(PieStart+im->gdes[i].yrule)/100.0);
2614 PieStart += im->gdes[i].yrule;
2621 #ifdef WITH_PIECHART
2629 /* grid_paint also does the text */
2630 if( !(im->extra_flags & ONLY_GRAPH) )
2634 if( !(im->extra_flags & ONLY_GRAPH) )
2637 /* the RULES are the last thing to paint ... */
2638 for(i=0;i<im->gdes_c;i++){
2640 switch(im->gdes[i].gf){
2642 if(isnan(im->gdes[i].yrule)) { /* fetch variable */
2643 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2645 if(im->gdes[i].yrule >= im->minval
2646 && im->gdes[i].yrule <= im->maxval)
2647 gfx_new_line(im->canvas,
2648 im->xorigin,ytr(im,im->gdes[i].yrule),
2649 im->xorigin+im->xsize,ytr(im,im->gdes[i].yrule),
2650 1.0,im->gdes[i].col);
2653 if(im->gdes[i].xrule == 0) { /* fetch variable */
2654 im->gdes[i].xrule = im->gdes[im->gdes[i].vidx].vf.when;
2656 if(im->gdes[i].xrule >= im->start
2657 && im->gdes[i].xrule <= im->end)
2658 gfx_new_line(im->canvas,
2659 xtr(im,im->gdes[i].xrule),im->yorigin,
2660 xtr(im,im->gdes[i].xrule),im->yorigin-im->ysize,
2661 1.0,im->gdes[i].col);
2669 if (strcmp(im->graphfile,"-")==0) {
2670 fo = im->graphhandle ? im->graphhandle : stdout;
2671 #if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
2672 /* Change translation mode for stdout to BINARY */
2673 _setmode( _fileno( fo ), O_BINARY );
2676 if ((fo = fopen(im->graphfile,"wb")) == NULL) {
2677 rrd_set_error("Opening '%s' for write: %s",im->graphfile,
2678 rrd_strerror(errno));
2682 gfx_render (im->canvas,im->ximg,im->yimg,0x00000000,fo);
2683 if (strcmp(im->graphfile,"-") != 0)
2689 /*****************************************************
2691 *****************************************************/
2694 gdes_alloc(image_desc_t *im){
2697 if ((im->gdes = (graph_desc_t *) rrd_realloc(im->gdes, (im->gdes_c)
2698 * sizeof(graph_desc_t)))==NULL){
2699 rrd_set_error("realloc graph_descs");
2704 im->gdes[im->gdes_c-1].step=im->step;
2705 im->gdes[im->gdes_c-1].stack=0;
2706 im->gdes[im->gdes_c-1].debug=0;
2707 im->gdes[im->gdes_c-1].start=im->start;
2708 im->gdes[im->gdes_c-1].end=im->end;
2709 im->gdes[im->gdes_c-1].vname[0]='\0';
2710 im->gdes[im->gdes_c-1].data=NULL;
2711 im->gdes[im->gdes_c-1].ds_namv=NULL;
2712 im->gdes[im->gdes_c-1].data_first=0;
2713 im->gdes[im->gdes_c-1].p_data=NULL;
2714 im->gdes[im->gdes_c-1].rpnp=NULL;
2715 im->gdes[im->gdes_c-1].shift=0;
2716 im->gdes[im->gdes_c-1].col = 0x0;
2717 im->gdes[im->gdes_c-1].legend[0]='\0';
2718 im->gdes[im->gdes_c-1].format[0]='\0';
2719 im->gdes[im->gdes_c-1].rrd[0]='\0';
2720 im->gdes[im->gdes_c-1].ds=-1;
2721 im->gdes[im->gdes_c-1].p_data=NULL;
2722 im->gdes[im->gdes_c-1].yrule=DNAN;
2723 im->gdes[im->gdes_c-1].xrule=0;
2727 /* copies input untill the first unescaped colon is found
2728 or until input ends. backslashes have to be escaped as well */
2730 scan_for_col(char *input, int len, char *output)
2735 input[inp] != ':' &&
2738 if (input[inp] == '\\' &&
2739 input[inp+1] != '\0' &&
2740 (input[inp+1] == '\\' ||
2741 input[inp+1] == ':')){
2742 output[outp++] = input[++inp];
2745 output[outp++] = input[inp];
2748 output[outp] = '\0';
2751 /* Some surgery done on this function, it became ridiculously big.
2753 ** - initializing now in rrd_graph_init()
2754 ** - options parsing now in rrd_graph_options()
2755 ** - script parsing now in rrd_graph_script()
2758 rrd_graph(int argc, char **argv, char ***prdata, int *xsize, int *ysize, FILE *stream, double *ymin, double *ymax)
2761 rrd_graph_init(&im);
2762 im.graphhandle = stream;
2764 rrd_graph_options(argc,argv,&im);
2765 if (rrd_test_error()) {
2770 if (strlen(argv[optind])>=MAXPATH) {
2771 rrd_set_error("filename (including path) too long");
2775 strncpy(im.graphfile,argv[optind],MAXPATH-1);
2776 im.graphfile[MAXPATH-1]='\0';
2778 rrd_graph_script(argc,argv,&im,1);
2779 if (rrd_test_error()) {
2784 /* Everything is now read and the actual work can start */
2787 if (graph_paint(&im,prdata)==-1){
2792 /* The image is generated and needs to be output.
2793 ** Also, if needed, print a line with information about the image.
2803 /* maybe prdata is not allocated yet ... lets do it now */
2804 if ((*prdata = calloc(2,sizeof(char *)))==NULL) {
2805 rrd_set_error("malloc imginfo");
2809 if(((*prdata)[0] = malloc((strlen(im.imginfo)+200+strlen(im.graphfile))*sizeof(char)))
2811 rrd_set_error("malloc imginfo");
2814 filename=im.graphfile+strlen(im.graphfile);
2815 while(filename > im.graphfile) {
2816 if (*(filename-1)=='/' || *(filename-1)=='\\' ) break;
2820 sprintf((*prdata)[0],im.imginfo,filename,(long)(im.canvas->zoom*im.ximg),(long)(im.canvas->zoom*im.yimg));
2827 rrd_graph_init(image_desc_t *im)
2834 #ifdef HAVE_SETLOCALE
2835 setlocale(LC_TIME,"");
2840 im->xlab_user.minsec = -1;
2846 im->ylegend[0] = '\0';
2847 im->title[0] = '\0';
2850 im->unitsexponent= 9999;
2853 im->viewfactor = 1.0;
2860 im->logarithmic = 0;
2861 im->ygridstep = DNAN;
2862 im->draw_x_grid = 1;
2863 im->draw_y_grid = 1;
2868 im->canvas = gfx_new_canvas();
2869 im->grid_dash_on = 1;
2870 im->grid_dash_off = 1;
2871 im->tabwidth = 40.0;
2873 for(i=0;i<DIM(graph_col);i++)
2874 im->graph_col[i]=graph_col[i];
2876 #if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
2879 char rrd_win_default_font[1000];
2880 windir = getenv("windir");
2881 /* %windir% is something like D:\windows or C:\winnt */
2882 if (windir != NULL) {
2883 strncpy(rrd_win_default_font,windir,999);
2884 rrd_win_default_font[999] = '\0';
2885 strcat(rrd_win_default_font,"\\fonts\\");
2886 strcat(rrd_win_default_font,RRD_DEFAULT_FONT);
2887 for(i=0;i<DIM(text_prop);i++){
2888 strncpy(text_prop[i].font,rrd_win_default_font,sizeof(text_prop[i].font)-1);
2889 text_prop[i].font[sizeof(text_prop[i].font)-1] = '\0';
2896 deffont = getenv("RRD_DEFAULT_FONT");
2897 if (deffont != NULL) {
2898 for(i=0;i<DIM(text_prop);i++){
2899 strncpy(text_prop[i].font,deffont,sizeof(text_prop[i].font)-1);
2900 text_prop[i].font[sizeof(text_prop[i].font)-1] = '\0';
2904 for(i=0;i<DIM(text_prop);i++){
2905 im->text_prop[i].size = text_prop[i].size;
2906 strcpy(im->text_prop[i].font,text_prop[i].font);
2911 rrd_graph_options(int argc, char *argv[],image_desc_t *im)
2914 char *parsetime_error = NULL;
2915 char scan_gtm[12],scan_mtm[12],scan_ltm[12],col_nam[12];
2916 time_t start_tmp=0,end_tmp=0;
2918 struct rrd_time_value start_tv, end_tv;
2920 optind = 0; opterr = 0; /* initialize getopt */
2922 parsetime("end-24h", &start_tv);
2923 parsetime("now", &end_tv);
2926 static struct option long_options[] =
2928 {"start", required_argument, 0, 's'},
2929 {"end", required_argument, 0, 'e'},
2930 {"x-grid", required_argument, 0, 'x'},
2931 {"y-grid", required_argument, 0, 'y'},
2932 {"vertical-label",required_argument,0,'v'},
2933 {"width", required_argument, 0, 'w'},
2934 {"height", required_argument, 0, 'h'},
2935 {"interlaced", no_argument, 0, 'i'},
2936 {"upper-limit",required_argument, 0, 'u'},
2937 {"lower-limit",required_argument, 0, 'l'},
2938 {"rigid", no_argument, 0, 'r'},
2939 {"base", required_argument, 0, 'b'},
2940 {"logarithmic",no_argument, 0, 'o'},
2941 {"color", required_argument, 0, 'c'},
2942 {"font", required_argument, 0, 'n'},
2943 {"title", required_argument, 0, 't'},
2944 {"imginfo", required_argument, 0, 'f'},
2945 {"imgformat", required_argument, 0, 'a'},
2946 {"lazy", no_argument, 0, 'z'},
2947 {"zoom", required_argument, 0, 'm'},
2948 {"no-legend", no_argument, 0, 'g'},
2949 {"force-rules-legend",no_argument,0, 'F'},
2950 {"only-graph", no_argument, 0, 'j'},
2951 {"alt-y-grid", no_argument, 0, 'Y'},
2952 {"no-minor", no_argument, 0, 'I'},
2953 {"slope-mode", no_argument, 0, 'E'},
2954 {"alt-autoscale", no_argument, 0, 'A'},
2955 {"alt-autoscale-max", no_argument, 0, 'M'},
2956 {"no-gridfit", no_argument, 0, 'N'},
2957 {"units-exponent",required_argument, 0, 'X'},
2958 {"units-length",required_argument, 0, 'L'},
2959 {"step", required_argument, 0, 'S'},
2960 {"tabwidth", required_argument, 0, 'T'},
2961 {"font-render-mode", required_argument, 0, 'R'},
2962 {"font-smoothing-threshold", required_argument, 0, 'B'},
2963 {"alt-y-mrtg", no_argument, 0, 1000}, /* this has no effect it is just here to save old apps from crashing when they use it */
2965 int option_index = 0;
2967 int col_start,col_end;
2969 opt = getopt_long(argc, argv,
2970 "s:e:x:y:v:w:h:iu:l:rb:oc:n:m:t:f:a:I:zgjFYAMEX:L:S:T:NR:B:",
2971 long_options, &option_index);
2978 im->extra_flags |= NOMINOR;
2981 im->extra_flags |= ALTYGRID;
2984 im->extra_flags |= ALTAUTOSCALE;
2987 im->extra_flags |= ALTAUTOSCALE_MAX;
2990 im->extra_flags |= ONLY_GRAPH;
2993 im->extra_flags |= NOLEGEND;
2996 im->extra_flags |= FORCE_RULES_LEGEND;
2999 im->unitsexponent = atoi(optarg);
3002 im->unitslength = atoi(optarg);
3005 im->tabwidth = atof(optarg);
3008 im->step = atoi(optarg);
3014 if ((parsetime_error = parsetime(optarg, &start_tv))) {
3015 rrd_set_error( "start time: %s", parsetime_error );
3020 if ((parsetime_error = parsetime(optarg, &end_tv))) {
3021 rrd_set_error( "end time: %s", parsetime_error );
3026 if(strcmp(optarg,"none") == 0){
3032 "%10[A-Z]:%ld:%10[A-Z]:%ld:%10[A-Z]:%ld:%ld:%n",
3034 &im->xlab_user.gridst,
3036 &im->xlab_user.mgridst,
3038 &im->xlab_user.labst,
3039 &im->xlab_user.precis,
3040 &stroff) == 7 && stroff != 0){
3041 strncpy(im->xlab_form, optarg+stroff, sizeof(im->xlab_form) - 1);
3042 im->xlab_form[sizeof(im->xlab_form)-1] = '\0';
3043 if((int)(im->xlab_user.gridtm = tmt_conv(scan_gtm)) == -1){
3044 rrd_set_error("unknown keyword %s",scan_gtm);
3046 } else if ((int)(im->xlab_user.mgridtm = tmt_conv(scan_mtm)) == -1){
3047 rrd_set_error("unknown keyword %s",scan_mtm);
3049 } else if ((int)(im->xlab_user.labtm = tmt_conv(scan_ltm)) == -1){
3050 rrd_set_error("unknown keyword %s",scan_ltm);
3053 im->xlab_user.minsec = 1;
3054 im->xlab_user.stst = im->xlab_form;
3056 rrd_set_error("invalid x-grid format");
3062 if(strcmp(optarg,"none") == 0){
3070 &im->ylabfact) == 2) {
3071 if(im->ygridstep<=0){
3072 rrd_set_error("grid step must be > 0");
3074 } else if (im->ylabfact < 1){
3075 rrd_set_error("label factor must be > 0");
3079 rrd_set_error("invalid y-grid format");
3084 strncpy(im->ylegend,optarg,150);
3085 im->ylegend[150]='\0';
3088 im->maxval = atof(optarg);
3091 im->minval = atof(optarg);
3094 im->base = atol(optarg);
3095 if(im->base != 1024 && im->base != 1000 ){
3096 rrd_set_error("the only sensible value for base apart from 1000 is 1024");
3101 long_tmp = atol(optarg);
3102 if (long_tmp < 10) {
3103 rrd_set_error("width below 10 pixels");
3106 im->xsize = long_tmp;
3109 long_tmp = atol(optarg);
3110 if (long_tmp < 10) {
3111 rrd_set_error("height below 10 pixels");
3114 im->ysize = long_tmp;
3117 im->canvas->interlaced = 1;
3123 im->imginfo = optarg;
3126 if((int)(im->canvas->imgformat = if_conv(optarg)) == -1) {
3127 rrd_set_error("unsupported graphics format '%s'",optarg);
3139 im->logarithmic = 1;
3140 if (isnan(im->minval))
3145 "%10[A-Z]#%n%8lx%n",
3146 col_nam,&col_start,&color,&col_end) == 2){
3148 int col_len = col_end - col_start;
3152 ((color & 0xF00) * 0x110000) |
3153 ((color & 0x0F0) * 0x011000) |
3154 ((color & 0x00F) * 0x001100) |
3160 ((color & 0xF000) * 0x11000) |
3161 ((color & 0x0F00) * 0x01100) |
3162 ((color & 0x00F0) * 0x00110) |
3163 ((color & 0x000F) * 0x00011)
3167 color = (color << 8) + 0xff /* shift left by 8 */;
3172 rrd_set_error("the color format is #RRGGBB[AA]");
3175 if((ci=grc_conv(col_nam)) != -1){
3176 im->graph_col[ci]=color;
3178 rrd_set_error("invalid color name '%s'",col_nam);
3182 rrd_set_error("invalid color def format");
3189 char font[1024] = "";
3192 "%10[A-Z]:%lf:%1000s",
3193 prop,&size,font) >= 2){
3195 if((sindex=text_prop_conv(prop)) != -1){
3196 for (propidx=sindex;propidx<TEXT_PROP_LAST;propidx++){
3198 im->text_prop[propidx].size=size;
3200 if (strlen(font) > 0){
3201 strcpy(im->text_prop[propidx].font,font);
3203 if (propidx==sindex && sindex != 0) break;
3206 rrd_set_error("invalid fonttag '%s'",prop);
3210 rrd_set_error("invalid text property format");
3216 im->canvas->zoom = atof(optarg);
3217 if (im->canvas->zoom <= 0.0) {
3218 rrd_set_error("zoom factor must be > 0");
3223 strncpy(im->title,optarg,150);
3224 im->title[150]='\0';
3228 if ( strcmp( optarg, "normal" ) == 0 )
3229 im->canvas->aa_type = AA_NORMAL;
3230 else if ( strcmp( optarg, "light" ) == 0 )
3231 im->canvas->aa_type = AA_LIGHT;
3232 else if ( strcmp( optarg, "mono" ) == 0 )
3233 im->canvas->aa_type = AA_NONE;
3236 rrd_set_error("unknown font-render-mode '%s'", optarg );
3242 im->canvas->font_aa_threshold = atof(optarg);
3247 rrd_set_error("unknown option '%c'", optopt);
3249 rrd_set_error("unknown option '%s'",argv[optind-1]);
3254 if (optind >= argc) {
3255 rrd_set_error("missing filename");
3259 if (im->logarithmic == 1 && (im->minval <= 0 || isnan(im->minval))){
3260 rrd_set_error("for a logarithmic yaxis you must specify a lower-limit > 0");
3264 if (proc_start_end(&start_tv,&end_tv,&start_tmp,&end_tmp) == -1){
3265 /* error string is set in parsetime.c */
3269 if (start_tmp < 3600*24*365*10){
3270 rrd_set_error("the first entry to fetch should be after 1980 (%ld)",start_tmp);
3274 if (end_tmp < start_tmp) {
3275 rrd_set_error("start (%ld) should be less than end (%ld)",
3276 start_tmp, end_tmp);
3280 im->start = start_tmp;
3282 im->step = max((long)im->step, (im->end-im->start)/im->xsize);
3286 rrd_graph_check_vname(image_desc_t *im, char *varname, char *err)
3288 if ((im->gdes[im->gdes_c-1].vidx=find_var(im,varname))==-1) {
3289 rrd_set_error("Unknown variable '%s' in %s",varname,err);
3295 rrd_graph_color(image_desc_t *im, char *var, char *err, int optional)
3298 graph_desc_t *gdp=&im->gdes[im->gdes_c-1];
3300 color=strstr(var,"#");
3303 rrd_set_error("Found no color in %s",err);
3312 rest=strstr(color,":");
3320 sscanf(color,"#%6lx%n",&col,&n);
3321 col = (col << 8) + 0xff /* shift left by 8 */;
3322 if (n!=7) rrd_set_error("Color problem in %s",err);
3325 sscanf(color,"#%8lx%n",&col,&n);
3328 rrd_set_error("Color problem in %s",err);
3330 if (rrd_test_error()) return 0;
3337 int bad_format(char *fmt) {
3341 while (*ptr != '\0')
3342 if (*ptr++ == '%') {
3344 /* line cannot end with percent char */
3345 if (*ptr == '\0') return 1;
3347 /* '%s', '%S' and '%%' are allowed */
3348 if (*ptr == 's' || *ptr == 'S' || *ptr == '%') ptr++;
3350 /* or else '% 6.2lf' and such are allowed */
3353 /* optional padding character */
3354 if (*ptr == ' ' || *ptr == '+' || *ptr == '-') ptr++;
3356 /* This should take care of 'm.n' with all three optional */
3357 while (*ptr >= '0' && *ptr <= '9') ptr++;
3358 if (*ptr == '.') ptr++;
3359 while (*ptr >= '0' && *ptr <= '9') ptr++;
3361 /* Either 'le', 'lf' or 'lg' must follow here */
3362 if (*ptr++ != 'l') return 1;
3363 if (*ptr == 'e' || *ptr == 'f' || *ptr == 'g') ptr++;
3374 vdef_parse(gdes,str)
3375 struct graph_desc_t *gdes;
3378 /* A VDEF currently is either "func" or "param,func"
3379 * so the parsing is rather simple. Change if needed.
3386 sscanf(str,"%le,%29[A-Z]%n",¶m,func,&n);
3387 if (n== (int)strlen(str)) { /* matched */
3391 sscanf(str,"%29[A-Z]%n",func,&n);
3392 if (n== (int)strlen(str)) { /* matched */
3395 rrd_set_error("Unknown function string '%s' in VDEF '%s'"
3402 if (!strcmp("PERCENT",func)) gdes->vf.op = VDEF_PERCENT;
3403 else if (!strcmp("MAXIMUM",func)) gdes->vf.op = VDEF_MAXIMUM;
3404 else if (!strcmp("AVERAGE",func)) gdes->vf.op = VDEF_AVERAGE;
3405 else if (!strcmp("MINIMUM",func)) gdes->vf.op = VDEF_MINIMUM;
3406 else if (!strcmp("TOTAL", func)) gdes->vf.op = VDEF_TOTAL;
3407 else if (!strcmp("FIRST", func)) gdes->vf.op = VDEF_FIRST;
3408 else if (!strcmp("LAST", func)) gdes->vf.op = VDEF_LAST;
3409 else if (!strcmp("LSLSLOPE", func)) gdes->vf.op = VDEF_LSLSLOPE;
3410 else if (!strcmp("LSLINT", func)) gdes->vf.op = VDEF_LSLINT;
3411 else if (!strcmp("LSLCORREL",func)) gdes->vf.op = VDEF_LSLCORREL;
3413 rrd_set_error("Unknown function '%s' in VDEF '%s'\n"
3420 switch (gdes->vf.op) {
3422 if (isnan(param)) { /* no parameter given */
3423 rrd_set_error("Function '%s' needs parameter in VDEF '%s'\n"
3429 if (param>=0.0 && param<=100.0) {
3430 gdes->vf.param = param;
3431 gdes->vf.val = DNAN; /* undefined */
3432 gdes->vf.when = 0; /* undefined */
3434 rrd_set_error("Parameter '%f' out of range in VDEF '%s'\n"
3449 case VDEF_LSLCORREL:
3451 gdes->vf.param = DNAN;
3452 gdes->vf.val = DNAN;
3455 rrd_set_error("Function '%s' needs no parameter in VDEF '%s'\n"
3472 graph_desc_t *src,*dst;
3476 dst = &im->gdes[gdi];
3477 src = &im->gdes[dst->vidx];
3478 data = src->data + src->ds;
3479 steps = (src->end - src->start) / src->step;
3482 printf("DEBUG: start == %lu, end == %lu, %lu steps\n"
3489 switch (dst->vf.op) {
3490 case VDEF_PERCENT: {
3491 rrd_value_t * array;
3495 if ((array = malloc(steps*sizeof(double)))==NULL) {
3496 rrd_set_error("malloc VDEV_PERCENT");
3499 for (step=0;step < steps; step++) {
3500 array[step]=data[step*src->ds_cnt];
3502 qsort(array,step,sizeof(double),vdef_percent_compar);
3504 field = (steps-1)*dst->vf.param/100;
3505 dst->vf.val = array[field];
3506 dst->vf.when = 0; /* no time component */
3509 for(step=0;step<steps;step++)
3510 printf("DEBUG: %3li:%10.2f %c\n",step,array[step],step==field?'*':' ');
3516 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3517 if (step == steps) {
3521 dst->vf.val = data[step*src->ds_cnt];
3522 dst->vf.when = src->start + (step+1)*src->step;
3524 while (step != steps) {
3525 if (finite(data[step*src->ds_cnt])) {
3526 if (data[step*src->ds_cnt] > dst->vf.val) {
3527 dst->vf.val = data[step*src->ds_cnt];
3528 dst->vf.when = src->start + (step+1)*src->step;
3535 case VDEF_AVERAGE: {
3538 for (step=0;step<steps;step++) {
3539 if (finite(data[step*src->ds_cnt])) {
3540 sum += data[step*src->ds_cnt];
3545 if (dst->vf.op == VDEF_TOTAL) {
3546 dst->vf.val = sum*src->step;
3547 dst->vf.when = cnt*src->step; /* not really "when" */
3549 dst->vf.val = sum/cnt;
3550 dst->vf.when = 0; /* no time component */
3560 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3561 if (step == steps) {
3565 dst->vf.val = data[step*src->ds_cnt];
3566 dst->vf.when = src->start + (step+1)*src->step;
3568 while (step != steps) {
3569 if (finite(data[step*src->ds_cnt])) {
3570 if (data[step*src->ds_cnt] < dst->vf.val) {
3571 dst->vf.val = data[step*src->ds_cnt];
3572 dst->vf.when = src->start + (step+1)*src->step;
3579 /* The time value returned here is one step before the
3580 * actual time value. This is the start of the first
3584 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3585 if (step == steps) { /* all entries were NaN */
3589 dst->vf.val = data[step*src->ds_cnt];
3590 dst->vf.when = src->start + step*src->step;
3594 /* The time value returned here is the
3595 * actual time value. This is the end of the last
3599 while (step >= 0 && isnan(data[step*src->ds_cnt])) step--;
3600 if (step < 0) { /* all entries were NaN */
3604 dst->vf.val = data[step*src->ds_cnt];
3605 dst->vf.when = src->start + (step+1)*src->step;
3610 case VDEF_LSLCORREL:{
3611 /* Bestfit line by linear least squares method */
3614 double SUMx, SUMy, SUMxy, SUMxx, SUMyy, slope, y_intercept, correl ;
3615 SUMx = 0; SUMy = 0; SUMxy = 0; SUMxx = 0; SUMyy = 0;
3617 for (step=0;step<steps;step++) {
3618 if (finite(data[step*src->ds_cnt])) {
3621 SUMxx += step * step;
3622 SUMxy += step * data[step*src->ds_cnt];
3623 SUMy += data[step*src->ds_cnt];
3624 SUMyy += data[step*src->ds_cnt]*data[step*src->ds_cnt];
3628 slope = ( SUMx*SUMy - cnt*SUMxy ) / ( SUMx*SUMx - cnt*SUMxx );
3629 y_intercept = ( SUMy - slope*SUMx ) / cnt;
3630 correl = (SUMxy - (SUMx*SUMy)/cnt) / sqrt((SUMxx - (SUMx*SUMx)/cnt)*(SUMyy - (SUMy*SUMy)/cnt));
3633 if (dst->vf.op == VDEF_LSLSLOPE) {
3634 dst->vf.val = slope;
3635 dst->vf.when = cnt*src->step;
3636 } else if (dst->vf.op == VDEF_LSLINT) {
3637 dst->vf.val = y_intercept;
3638 dst->vf.when = cnt*src->step;
3639 } else if (dst->vf.op == VDEF_LSLCORREL) {
3640 dst->vf.val = correl;
3641 dst->vf.when = cnt*src->step;
3654 /* NaN < -INF < finite_values < INF */
3656 vdef_percent_compar(a,b)
3659 /* Equality is not returned; this doesn't hurt except
3660 * (maybe) for a little performance.
3663 /* First catch NaN values. They are smallest */
3664 if (isnan( *(double *)a )) return -1;
3665 if (isnan( *(double *)b )) return 1;
3667 /* NaN doesn't reach this part so INF and -INF are extremes.
3668 * The sign from isinf() is compatible with the sign we return
3670 if (isinf( *(double *)a )) return isinf( *(double *)a );
3671 if (isinf( *(double *)b )) return isinf( *(double *)b );
3673 /* If we reach this, both values must be finite */
3674 if ( *(double *)a < *(double *)b ) return -1; else return 1;