1 /****************************************************************************
2 * RRDtool 1.2.12 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, 0, TMT_SECOND,30, TMT_MINUTE,5, TMT_MINUTE,5, 0,"%H:%M"},
46 {2, 0, TMT_MINUTE,1, TMT_MINUTE,5, TMT_MINUTE,5, 0,"%H:%M"},
47 {5, 0, TMT_MINUTE,2, TMT_MINUTE,10, TMT_MINUTE,10, 0,"%H:%M"},
48 {10, 0, TMT_MINUTE,5, TMT_MINUTE,20, TMT_MINUTE,20, 0,"%H:%M"},
49 {30, 0, TMT_MINUTE,10, TMT_HOUR,1, TMT_HOUR,1, 0,"%H:%M"},
50 {60, 0, TMT_MINUTE,30, TMT_HOUR,2, TMT_HOUR,2, 0,"%H:%M"},
51 {180, 0, TMT_HOUR,1, TMT_HOUR,6, TMT_HOUR,6, 0,"%H:%M"},
52 {180, 1*24*3600, TMT_HOUR,1, TMT_HOUR,6, TMT_HOUR,6, 0,"%a %H:%M"},
53 /*{300, 0, TMT_HOUR,3, TMT_HOUR,12, TMT_HOUR,12, 12*3600,"%a %p"}, this looks silly*/
54 {600, 0, TMT_HOUR,6, TMT_DAY,1, TMT_DAY,1, 24*3600,"%a"},
55 {600, 1*24*3600, TMT_HOUR,6, TMT_DAY,1, TMT_DAY,1, 24*3600,"%a %d"},
56 {1800, 0, TMT_HOUR,12, TMT_DAY,1, TMT_DAY,2, 24*3600,"%a"},
57 {1800, 1*24*3600, TMT_HOUR,12, TMT_DAY,1, TMT_DAY,2, 24*3600,"%a %d"},
58 {3600, 0, TMT_DAY,1, TMT_WEEK,1, TMT_WEEK,1, 7*24*3600,"Week %V"},
59 {3*3600, 0, TMT_WEEK,1, TMT_MONTH,1, TMT_WEEK,2, 7*24*3600,"Week %V"},
60 {6*3600, 0, TMT_MONTH,1, TMT_MONTH,1, TMT_MONTH,1, 30*24*3600,"%b"},
61 {48*3600, 0, TMT_MONTH,1, TMT_MONTH,3, TMT_MONTH,3, 30*24*3600,"%b"},
62 {10*24*3600, 0, TMT_YEAR,1, TMT_YEAR,1, TMT_YEAR,1, 365*24*3600,"%y"},
63 {-1,0,TMT_MONTH,0,TMT_MONTH,0,TMT_MONTH,0,0,""}
66 /* sensible logarithmic y label intervals ...
67 the first element of each row defines the possible starting points on the
68 y axis ... the other specify the */
70 double yloglab[][12]= {{ 1e9, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
71 { 1e3, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
72 { 1e1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
73 /* { 1e1, 1, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, */
74 { 1e1, 1, 2.5, 5, 7.5, 0, 0, 0, 0, 0, 0, 0 },
75 { 1e1, 1, 2, 4, 6, 8, 0, 0, 0, 0, 0, 0 },
76 { 1e1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0 },
77 { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }};
79 /* sensible y label intervals ...*/
97 gfx_color_t graph_col[] = /* default colors */
98 { 0xFFFFFFFF, /* canvas */
99 0xF0F0F0FF, /* background */
100 0xD0D0D0FF, /* shade A */
101 0xA0A0A0FF, /* shade B */
102 0x90909080, /* grid */
103 0xE0505080, /* major grid */
104 0x000000FF, /* font */
105 0x802020FF, /* arrow */
106 0x202020FF, /* axis */
107 0x000000FF /* frame */
114 # define DPRINT(x) (void)(printf x, printf("\n"))
120 /* initialize with xtr(im,0); */
122 xtr(image_desc_t *im,time_t mytime){
125 pixie = (double) im->xsize / (double)(im->end - im->start);
128 return (int)((double)im->xorigin
129 + pixie * ( mytime - im->start ) );
132 /* translate data values into y coordinates */
134 ytr(image_desc_t *im, double value){
139 pixie = (double) im->ysize / (im->maxval - im->minval);
141 pixie = (double) im->ysize / (log10(im->maxval) - log10(im->minval));
143 } else if(!im->logarithmic) {
144 yval = im->yorigin - pixie * (value - im->minval);
146 if (value < im->minval) {
149 yval = im->yorigin - pixie * (log10(value) - log10(im->minval));
152 /* make sure we don't return anything too unreasonable. GD lib can
153 get terribly slow when drawing lines outside its scope. This is
154 especially problematic in connection with the rigid option */
156 /* keep yval as-is */
157 } else if (yval > im->yorigin) {
158 yval = im->yorigin +0.00001;
159 } else if (yval < im->yorigin - im->ysize){
160 yval = im->yorigin - im->ysize - 0.00001;
167 /* conversion function for symbolic entry names */
170 #define conv_if(VV,VVV) \
171 if (strcmp(#VV, string) == 0) return VVV ;
173 enum gf_en gf_conv(char *string){
175 conv_if(PRINT,GF_PRINT)
176 conv_if(GPRINT,GF_GPRINT)
177 conv_if(COMMENT,GF_COMMENT)
178 conv_if(HRULE,GF_HRULE)
179 conv_if(VRULE,GF_VRULE)
180 conv_if(LINE,GF_LINE)
181 conv_if(AREA,GF_AREA)
182 conv_if(STACK,GF_STACK)
183 conv_if(TICK,GF_TICK)
185 conv_if(CDEF,GF_CDEF)
186 conv_if(VDEF,GF_VDEF)
188 conv_if(PART,GF_PART)
190 conv_if(XPORT,GF_XPORT)
191 conv_if(SHIFT,GF_SHIFT)
196 enum gfx_if_en if_conv(char *string){
206 enum tmt_en tmt_conv(char *string){
208 conv_if(SECOND,TMT_SECOND)
209 conv_if(MINUTE,TMT_MINUTE)
210 conv_if(HOUR,TMT_HOUR)
212 conv_if(WEEK,TMT_WEEK)
213 conv_if(MONTH,TMT_MONTH)
214 conv_if(YEAR,TMT_YEAR)
218 enum grc_en grc_conv(char *string){
220 conv_if(BACK,GRC_BACK)
221 conv_if(CANVAS,GRC_CANVAS)
222 conv_if(SHADEA,GRC_SHADEA)
223 conv_if(SHADEB,GRC_SHADEB)
224 conv_if(GRID,GRC_GRID)
225 conv_if(MGRID,GRC_MGRID)
226 conv_if(FONT,GRC_FONT)
227 conv_if(ARROW,GRC_ARROW)
228 conv_if(AXIS,GRC_AXIS)
229 conv_if(FRAME,GRC_FRAME)
234 enum text_prop_en text_prop_conv(char *string){
236 conv_if(DEFAULT,TEXT_PROP_DEFAULT)
237 conv_if(TITLE,TEXT_PROP_TITLE)
238 conv_if(AXIS,TEXT_PROP_AXIS)
239 conv_if(UNIT,TEXT_PROP_UNIT)
240 conv_if(LEGEND,TEXT_PROP_LEGEND)
248 im_free(image_desc_t *im)
252 if (im == NULL) return 0;
253 for(i=0;i<(unsigned)im->gdes_c;i++){
254 if (im->gdes[i].data_first){
255 /* careful here, because a single pointer can occur several times */
256 free (im->gdes[i].data);
257 if (im->gdes[i].ds_namv){
258 for (ii=0;ii<im->gdes[i].ds_cnt;ii++)
259 free(im->gdes[i].ds_namv[ii]);
260 free(im->gdes[i].ds_namv);
263 free (im->gdes[i].p_data);
264 free (im->gdes[i].rpnp);
267 gfx_destroy(im->canvas);
271 /* find SI magnitude symbol for the given number*/
274 image_desc_t *im, /* image description */
281 char *symbol[] = {"a", /* 10e-18 Atto */
282 "f", /* 10e-15 Femto */
283 "p", /* 10e-12 Pico */
284 "n", /* 10e-9 Nano */
285 "u", /* 10e-6 Micro */
286 "m", /* 10e-3 Milli */
291 "T", /* 10e12 Tera */
292 "P", /* 10e15 Peta */
298 if (*value == 0.0 || isnan(*value) ) {
302 sindex = floor(log(fabs(*value))/log((double)im->base));
303 *magfact = pow((double)im->base, (double)sindex);
304 (*value) /= (*magfact);
306 if ( sindex <= symbcenter && sindex >= -symbcenter) {
307 (*symb_ptr) = symbol[sindex+symbcenter];
315 /* find SI magnitude symbol for the numbers on the y-axis*/
318 image_desc_t *im /* image description */
322 char symbol[] = {'a', /* 10e-18 Atto */
323 'f', /* 10e-15 Femto */
324 'p', /* 10e-12 Pico */
325 'n', /* 10e-9 Nano */
326 'u', /* 10e-6 Micro */
327 'm', /* 10e-3 Milli */
332 'T', /* 10e12 Tera */
333 'P', /* 10e15 Peta */
337 double digits,viewdigits=0;
339 digits = floor( log( max( fabs(im->minval),fabs(im->maxval)))/log((double)im->base));
341 if (im->unitsexponent != 9999) {
342 /* unitsexponent = 9, 6, 3, 0, -3, -6, -9, etc */
343 viewdigits = floor(im->unitsexponent / 3);
348 im->magfact = pow((double)im->base , digits);
351 printf("digits %6.3f im->magfact %6.3f\n",digits,im->magfact);
354 im->viewfactor = im->magfact / pow((double)im->base , viewdigits);
356 if ( ((viewdigits+symbcenter) < sizeof(symbol)) &&
357 ((viewdigits+symbcenter) >= 0) )
358 im->symbol = symbol[(int)viewdigits+symbcenter];
363 /* move min and max values around to become sensible */
366 expand_range(image_desc_t *im)
368 double sensiblevalues[] ={1000.0,900.0,800.0,750.0,700.0,
369 600.0,500.0,400.0,300.0,250.0,
370 200.0,125.0,100.0,90.0,80.0,
371 75.0,70.0,60.0,50.0,40.0,30.0,
372 25.0,20.0,10.0,9.0,8.0,
373 7.0,6.0,5.0,4.0,3.5,3.0,
374 2.5,2.0,1.8,1.5,1.2,1.0,
375 0.8,0.7,0.6,0.5,0.4,0.3,0.2,0.1,0.0,-1};
377 double scaled_min,scaled_max;
384 printf("Min: %6.2f Max: %6.2f MagFactor: %6.2f\n",
385 im->minval,im->maxval,im->magfact);
388 if (isnan(im->ygridstep)){
389 if(im->extra_flags & ALTAUTOSCALE) {
390 /* measure the amplitude of the function. Make sure that
391 graph boundaries are slightly higher then max/min vals
392 so we can see amplitude on the graph */
395 delt = im->maxval - im->minval;
397 fact = 2.0 * pow(10.0,
398 floor(log10(max(fabs(im->minval), fabs(im->maxval))/im->magfact)) - 2);
400 adj = (fact - delt) * 0.55;
402 printf("Min: %6.2f Max: %6.2f delt: %6.2f fact: %6.2f adj: %6.2f\n", im->minval, im->maxval, delt, fact, adj);
408 else if(im->extra_flags & ALTAUTOSCALE_MAX) {
409 /* measure the amplitude of the function. Make sure that
410 graph boundaries are slightly higher than max vals
411 so we can see amplitude on the graph */
412 adj = (im->maxval - im->minval) * 0.1;
416 scaled_min = im->minval / im->magfact;
417 scaled_max = im->maxval / im->magfact;
419 for (i=1; sensiblevalues[i] > 0; i++){
420 if (sensiblevalues[i-1]>=scaled_min &&
421 sensiblevalues[i]<=scaled_min)
422 im->minval = sensiblevalues[i]*(im->magfact);
424 if (-sensiblevalues[i-1]<=scaled_min &&
425 -sensiblevalues[i]>=scaled_min)
426 im->minval = -sensiblevalues[i-1]*(im->magfact);
428 if (sensiblevalues[i-1] >= scaled_max &&
429 sensiblevalues[i] <= scaled_max)
430 im->maxval = sensiblevalues[i-1]*(im->magfact);
432 if (-sensiblevalues[i-1]<=scaled_max &&
433 -sensiblevalues[i] >=scaled_max)
434 im->maxval = -sensiblevalues[i]*(im->magfact);
438 /* adjust min and max to the grid definition if there is one */
439 im->minval = (double)im->ylabfact * im->ygridstep *
440 floor(im->minval / ((double)im->ylabfact * im->ygridstep));
441 im->maxval = (double)im->ylabfact * im->ygridstep *
442 ceil(im->maxval /( (double)im->ylabfact * im->ygridstep));
446 fprintf(stderr,"SCALED Min: %6.2f Max: %6.2f Factor: %6.2f\n",
447 im->minval,im->maxval,im->magfact);
452 apply_gridfit(image_desc_t *im)
454 if (isnan(im->minval) || isnan(im->maxval))
457 if (im->logarithmic) {
458 double ya, yb, ypix, ypixfrac;
459 double log10_range = log10(im->maxval) - log10(im->minval);
460 ya = pow((double)10, floor(log10(im->minval)));
461 while (ya < im->minval)
464 return; /* don't have y=10^x gridline */
466 if (yb <= im->maxval) {
467 /* we have at least 2 y=10^x gridlines.
468 Make sure distance between them in pixels
469 are an integer by expanding im->maxval */
470 double y_pixel_delta = ytr(im, ya) - ytr(im, yb);
471 double factor = y_pixel_delta / floor(y_pixel_delta);
472 double new_log10_range = factor * log10_range;
473 double new_ymax_log10 = log10(im->minval) + new_log10_range;
474 im->maxval = pow(10, new_ymax_log10);
475 ytr(im,DNAN); /* reset precalc */
476 log10_range = log10(im->maxval) - log10(im->minval);
478 /* make sure first y=10^x gridline is located on
479 integer pixel position by moving scale slightly
480 downwards (sub-pixel movement) */
481 ypix = ytr(im, ya) + im->ysize; /* add im->ysize so it always is positive */
482 ypixfrac = ypix - floor(ypix);
483 if (ypixfrac > 0 && ypixfrac < 1) {
484 double yfrac = ypixfrac / im->ysize;
485 im->minval = pow(10, log10(im->minval) - yfrac * log10_range);
486 im->maxval = pow(10, log10(im->maxval) - yfrac * log10_range);
487 ytr(im,DNAN); /* reset precalc */
490 /* Make sure we have an integer pixel distance between
491 each minor gridline */
492 double ypos1 = ytr(im, im->minval);
493 double ypos2 = ytr(im, im->minval + im->ygrid_scale.gridstep);
494 double y_pixel_delta = ypos1 - ypos2;
495 double factor = y_pixel_delta / floor(y_pixel_delta);
496 double new_range = factor * (im->maxval - im->minval);
497 double gridstep = im->ygrid_scale.gridstep;
498 double minor_y, minor_y_px, minor_y_px_frac;
499 im->maxval = im->minval + new_range;
500 ytr(im,DNAN); /* reset precalc */
501 /* make sure first minor gridline is on integer pixel y coord */
502 minor_y = gridstep * floor(im->minval / gridstep);
503 while (minor_y < im->minval)
505 minor_y_px = ytr(im, minor_y) + im->ysize; /* ensure > 0 by adding ysize */
506 minor_y_px_frac = minor_y_px - floor(minor_y_px);
507 if (minor_y_px_frac > 0 && minor_y_px_frac < 1) {
508 double yfrac = minor_y_px_frac / im->ysize;
509 double range = im->maxval - im->minval;
510 im->minval = im->minval - yfrac * range;
511 im->maxval = im->maxval - yfrac * range;
512 ytr(im,DNAN); /* reset precalc */
514 calc_horizontal_grid(im); /* recalc with changed im->maxval */
518 /* reduce data reimplementation by Alex */
522 enum cf_en cf, /* which consolidation function ?*/
523 unsigned long cur_step, /* step the data currently is in */
524 time_t *start, /* start, end and step as requested ... */
525 time_t *end, /* ... by the application will be ... */
526 unsigned long *step, /* ... adjusted to represent reality */
527 unsigned long *ds_cnt, /* number of data sources in file */
528 rrd_value_t **data) /* two dimensional array containing the data */
530 int i,reduce_factor = ceil((double)(*step) / (double)cur_step);
531 unsigned long col,dst_row,row_cnt,start_offset,end_offset,skiprows=0;
532 rrd_value_t *srcptr,*dstptr;
534 (*step) = cur_step*reduce_factor; /* set new step size for reduced data */
537 row_cnt = ((*end)-(*start))/cur_step;
543 printf("Reducing %lu rows with factor %i time %lu to %lu, step %lu\n",
544 row_cnt,reduce_factor,*start,*end,cur_step);
545 for (col=0;col<row_cnt;col++) {
546 printf("time %10lu: ",*start+(col+1)*cur_step);
547 for (i=0;i<*ds_cnt;i++)
548 printf(" %8.2e",srcptr[*ds_cnt*col+i]);
553 /* We have to combine [reduce_factor] rows of the source
554 ** into one row for the destination. Doing this we also
555 ** need to take care to combine the correct rows. First
556 ** alter the start and end time so that they are multiples
557 ** of the new step time. We cannot reduce the amount of
558 ** time so we have to move the end towards the future and
559 ** the start towards the past.
561 end_offset = (*end) % (*step);
562 start_offset = (*start) % (*step);
564 /* If there is a start offset (which cannot be more than
565 ** one destination row), skip the appropriate number of
566 ** source rows and one destination row. The appropriate
567 ** number is what we do know (start_offset/cur_step) of
568 ** the new interval (*step/cur_step aka reduce_factor).
571 printf("start_offset: %lu end_offset: %lu\n",start_offset,end_offset);
572 printf("row_cnt before: %lu\n",row_cnt);
575 (*start) = (*start)-start_offset;
576 skiprows=reduce_factor-start_offset/cur_step;
577 srcptr+=skiprows* *ds_cnt;
578 for (col=0;col<(*ds_cnt);col++) *dstptr++ = DNAN;
582 printf("row_cnt between: %lu\n",row_cnt);
585 /* At the end we have some rows that are not going to be
586 ** used, the amount is end_offset/cur_step
589 (*end) = (*end)-end_offset+(*step);
590 skiprows = end_offset/cur_step;
594 printf("row_cnt after: %lu\n",row_cnt);
597 /* Sanity check: row_cnt should be multiple of reduce_factor */
598 /* if this gets triggered, something is REALLY WRONG ... we die immediately */
600 if (row_cnt%reduce_factor) {
601 printf("SANITY CHECK: %lu rows cannot be reduced by %i \n",
602 row_cnt,reduce_factor);
603 printf("BUG in reduce_data()\n");
607 /* Now combine reduce_factor intervals at a time
608 ** into one interval for the destination.
611 for (dst_row=0;(long int)row_cnt>=reduce_factor;dst_row++) {
612 for (col=0;col<(*ds_cnt);col++) {
613 rrd_value_t newval=DNAN;
614 unsigned long validval=0;
616 for (i=0;i<reduce_factor;i++) {
617 if (isnan(srcptr[i*(*ds_cnt)+col])) {
621 if (isnan(newval)) newval = srcptr[i*(*ds_cnt)+col];
629 newval += srcptr[i*(*ds_cnt)+col];
632 newval = min (newval,srcptr[i*(*ds_cnt)+col]);
635 /* an interval contains a failure if any subintervals contained a failure */
637 newval = max (newval,srcptr[i*(*ds_cnt)+col]);
640 newval = srcptr[i*(*ds_cnt)+col];
645 if (validval == 0){newval = DNAN;} else{
663 srcptr+=(*ds_cnt)*reduce_factor;
664 row_cnt-=reduce_factor;
666 /* If we had to alter the endtime, we didn't have enough
667 ** source rows to fill the last row. Fill it with NaN.
669 if (end_offset) for (col=0;col<(*ds_cnt);col++) *dstptr++ = DNAN;
671 row_cnt = ((*end)-(*start))/ *step;
673 printf("Done reducing. Currently %lu rows, time %lu to %lu, step %lu\n",
674 row_cnt,*start,*end,*step);
675 for (col=0;col<row_cnt;col++) {
676 printf("time %10lu: ",*start+(col+1)*(*step));
677 for (i=0;i<*ds_cnt;i++)
678 printf(" %8.2e",srcptr[*ds_cnt*col+i]);
685 /* get the data required for the graphs from the
689 data_fetch(image_desc_t *im )
694 /* pull the data from the rrd files ... */
695 for (i=0;i< (int)im->gdes_c;i++){
696 /* only GF_DEF elements fetch data */
697 if (im->gdes[i].gf != GF_DEF)
701 /* do we have it already ?*/
702 for (ii=0;ii<i;ii++) {
703 if (im->gdes[ii].gf != GF_DEF)
705 if ((strcmp(im->gdes[i].rrd, im->gdes[ii].rrd) == 0)
706 && (im->gdes[i].cf == im->gdes[ii].cf)
707 && (im->gdes[i].cf_reduce == im->gdes[ii].cf_reduce)
708 && (im->gdes[i].start_orig == im->gdes[ii].start_orig)
709 && (im->gdes[i].end_orig == im->gdes[ii].end_orig)
710 && (im->gdes[i].step_orig == im->gdes[ii].step_orig)) {
711 /* OK, the data is already there.
712 ** Just copy the header portion
714 im->gdes[i].start = im->gdes[ii].start;
715 im->gdes[i].end = im->gdes[ii].end;
716 im->gdes[i].step = im->gdes[ii].step;
717 im->gdes[i].ds_cnt = im->gdes[ii].ds_cnt;
718 im->gdes[i].ds_namv = im->gdes[ii].ds_namv;
719 im->gdes[i].data = im->gdes[ii].data;
720 im->gdes[i].data_first = 0;
727 unsigned long ft_step = im->gdes[i].step ;
729 if((rrd_fetch_fn(im->gdes[i].rrd,
735 &im->gdes[i].ds_namv,
736 &im->gdes[i].data)) == -1){
739 im->gdes[i].data_first = 1;
740 im->gdes[i].step = im->step;
742 if (ft_step < im->gdes[i].step) {
743 reduce_data(im->gdes[i].cf_reduce,
751 im->gdes[i].step = ft_step;
755 /* lets see if the required data source is really there */
756 for(ii=0;ii<(int)im->gdes[i].ds_cnt;ii++){
757 if(strcmp(im->gdes[i].ds_namv[ii],im->gdes[i].ds_nam) == 0){
760 if (im->gdes[i].ds== -1){
761 rrd_set_error("No DS called '%s' in '%s'",
762 im->gdes[i].ds_nam,im->gdes[i].rrd);
770 /* evaluate the expressions in the CDEF functions */
772 /*************************************************************
774 *************************************************************/
777 find_var_wrapper(void *arg1, char *key)
779 return find_var((image_desc_t *) arg1, key);
782 /* find gdes containing var*/
784 find_var(image_desc_t *im, char *key){
786 for(ii=0;ii<im->gdes_c-1;ii++){
787 if((im->gdes[ii].gf == GF_DEF
788 || im->gdes[ii].gf == GF_VDEF
789 || im->gdes[ii].gf == GF_CDEF)
790 && (strcmp(im->gdes[ii].vname,key) == 0)){
797 /* find the largest common denominator for all the numbers
798 in the 0 terminated num array */
803 for (i=0;num[i+1]!=0;i++){
805 rest=num[i] % num[i+1];
806 num[i]=num[i+1]; num[i+1]=rest;
810 /* return i==0?num[i]:num[i-1]; */
814 /* run the rpn calculator on all the VDEF and CDEF arguments */
816 data_calc( image_desc_t *im){
820 long *steparray, rpi;
825 rpnstack_init(&rpnstack);
827 for (gdi=0;gdi<im->gdes_c;gdi++){
828 /* Look for GF_VDEF and GF_CDEF in the same loop,
829 * so CDEFs can use VDEFs and vice versa
831 switch (im->gdes[gdi].gf) {
835 graph_desc_t *vdp = &im->gdes[im->gdes[gdi].vidx];
837 /* remove current shift */
838 vdp->start -= vdp->shift;
839 vdp->end -= vdp->shift;
842 if (im->gdes[gdi].shidx >= 0)
843 vdp->shift = im->gdes[im->gdes[gdi].shidx].vf.val;
846 vdp->shift = im->gdes[gdi].shval;
848 /* normalize shift to multiple of consolidated step */
849 vdp->shift = (vdp->shift / (long)vdp->step) * (long)vdp->step;
852 vdp->start += vdp->shift;
853 vdp->end += vdp->shift;
857 /* A VDEF has no DS. This also signals other parts
858 * of rrdtool that this is a VDEF value, not a CDEF.
860 im->gdes[gdi].ds_cnt = 0;
861 if (vdef_calc(im,gdi)) {
862 rrd_set_error("Error processing VDEF '%s'"
865 rpnstack_free(&rpnstack);
870 im->gdes[gdi].ds_cnt = 1;
871 im->gdes[gdi].ds = 0;
872 im->gdes[gdi].data_first = 1;
873 im->gdes[gdi].start = 0;
874 im->gdes[gdi].end = 0;
879 /* Find the variables in the expression.
880 * - VDEF variables are substituted by their values
881 * and the opcode is changed into OP_NUMBER.
882 * - CDEF variables are analized for their step size,
883 * the lowest common denominator of all the step
884 * sizes of the data sources involved is calculated
885 * and the resulting number is the step size for the
886 * resulting data source.
888 for(rpi=0;im->gdes[gdi].rpnp[rpi].op != OP_END;rpi++){
889 if(im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
890 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER){
891 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
892 if (im->gdes[ptr].ds_cnt == 0) { /* this is a VDEF data source */
894 printf("DEBUG: inside CDEF '%s' processing VDEF '%s'\n",
896 im->gdes[ptr].vname);
897 printf("DEBUG: value from vdef is %f\n",im->gdes[ptr].vf.val);
899 im->gdes[gdi].rpnp[rpi].val = im->gdes[ptr].vf.val;
900 im->gdes[gdi].rpnp[rpi].op = OP_NUMBER;
901 } else { /* normal variables and PREF(variables) */
903 /* add one entry to the array that keeps track of the step sizes of the
904 * data sources going into the CDEF. */
906 rrd_realloc(steparray,
907 (++stepcnt+1)*sizeof(*steparray)))==NULL){
908 rrd_set_error("realloc steparray");
909 rpnstack_free(&rpnstack);
913 steparray[stepcnt-1] = im->gdes[ptr].step;
915 /* adjust start and end of cdef (gdi) so
916 * that it runs from the latest start point
917 * to the earliest endpoint of any of the
918 * rras involved (ptr)
921 if(im->gdes[gdi].start < im->gdes[ptr].start)
922 im->gdes[gdi].start = im->gdes[ptr].start;
924 if(im->gdes[gdi].end == 0 ||
925 im->gdes[gdi].end > im->gdes[ptr].end)
926 im->gdes[gdi].end = im->gdes[ptr].end;
928 /* store pointer to the first element of
929 * the rra providing data for variable,
930 * further save step size and data source
933 im->gdes[gdi].rpnp[rpi].data = im->gdes[ptr].data + im->gdes[ptr].ds;
934 im->gdes[gdi].rpnp[rpi].step = im->gdes[ptr].step;
935 im->gdes[gdi].rpnp[rpi].ds_cnt = im->gdes[ptr].ds_cnt;
937 /* backoff the *.data ptr; this is done so
938 * rpncalc() function doesn't have to treat
939 * the first case differently
941 } /* if ds_cnt != 0 */
942 } /* if OP_VARIABLE */
943 } /* loop through all rpi */
945 /* move the data pointers to the correct period */
946 for(rpi=0;im->gdes[gdi].rpnp[rpi].op != OP_END;rpi++){
947 if(im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
948 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER){
949 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
950 long diff = im->gdes[gdi].start - im->gdes[ptr].start;
953 im->gdes[gdi].rpnp[rpi].data += (diff / im->gdes[ptr].step) * im->gdes[ptr].ds_cnt;
957 if(steparray == NULL){
958 rrd_set_error("rpn expressions without DEF"
959 " or CDEF variables are not supported");
960 rpnstack_free(&rpnstack);
963 steparray[stepcnt]=0;
964 /* Now find the resulting step. All steps in all
965 * used RRAs have to be visited
967 im->gdes[gdi].step = lcd(steparray);
969 if((im->gdes[gdi].data = malloc((
970 (im->gdes[gdi].end-im->gdes[gdi].start)
971 / im->gdes[gdi].step)
972 * sizeof(double)))==NULL){
973 rrd_set_error("malloc im->gdes[gdi].data");
974 rpnstack_free(&rpnstack);
978 /* Step through the new cdef results array and
979 * calculate the values
981 for (now = im->gdes[gdi].start + im->gdes[gdi].step;
982 now<=im->gdes[gdi].end;
983 now += im->gdes[gdi].step)
985 rpnp_t *rpnp = im -> gdes[gdi].rpnp;
987 /* 3rd arg of rpn_calc is for OP_VARIABLE lookups;
988 * in this case we are advancing by timesteps;
989 * we use the fact that time_t is a synonym for long
991 if (rpn_calc(rpnp,&rpnstack,(long) now,
992 im->gdes[gdi].data,++dataidx) == -1) {
993 /* rpn_calc sets the error string */
994 rpnstack_free(&rpnstack);
997 } /* enumerate over time steps within a CDEF */
1002 } /* enumerate over CDEFs */
1003 rpnstack_free(&rpnstack);
1007 /* massage data so, that we get one value for each x coordinate in the graph */
1009 data_proc( image_desc_t *im ){
1011 double pixstep = (double)(im->end-im->start)
1012 /(double)im->xsize; /* how much time
1013 passes in one pixel */
1015 double minval=DNAN,maxval=DNAN;
1017 unsigned long gr_time;
1019 /* memory for the processed data */
1020 for(i=0;i<im->gdes_c;i++) {
1021 if((im->gdes[i].gf==GF_LINE) ||
1022 (im->gdes[i].gf==GF_AREA) ||
1023 (im->gdes[i].gf==GF_TICK)) {
1024 if((im->gdes[i].p_data = malloc((im->xsize +1)
1025 * sizeof(rrd_value_t)))==NULL){
1026 rrd_set_error("malloc data_proc");
1032 for (i=0;i<im->xsize;i++) { /* for each pixel */
1034 gr_time = im->start+pixstep*i; /* time of the current step */
1037 for (ii=0;ii<im->gdes_c;ii++) {
1039 switch (im->gdes[ii].gf) {
1043 if (!im->gdes[ii].stack)
1045 value = im->gdes[ii].yrule;
1046 if (isnan(value) || (im->gdes[ii].gf == GF_TICK)) {
1047 /* The time of the data doesn't necessarily match
1048 ** the time of the graph. Beware.
1050 vidx = im->gdes[ii].vidx;
1051 if (im->gdes[vidx].gf == GF_VDEF) {
1052 value = im->gdes[vidx].vf.val;
1053 } else if (((long int)gr_time >= (long int)im->gdes[vidx].start) &&
1054 ((long int)gr_time <= (long int)im->gdes[vidx].end) ) {
1055 value = im->gdes[vidx].data[
1056 (unsigned long) floor(
1057 (double)(gr_time - im->gdes[vidx].start)
1058 / im->gdes[vidx].step)
1059 * im->gdes[vidx].ds_cnt
1067 if (! isnan(value)) {
1069 im->gdes[ii].p_data[i] = paintval;
1070 /* GF_TICK: the data values are not
1071 ** relevant for min and max
1073 if (finite(paintval) && im->gdes[ii].gf != GF_TICK ) {
1074 if (isnan(minval) || paintval < minval)
1076 if (isnan(maxval) || paintval > maxval)
1080 im->gdes[ii].p_data[i] = DNAN;
1084 rrd_set_error("STACK should already be turned into LINE or AREA here");
1093 /* if min or max have not been asigned a value this is because
1094 there was no data in the graph ... this is not good ...
1095 lets set these to dummy values then ... */
1097 if (isnan(minval)) minval = 0.0;
1098 if (isnan(maxval)) maxval = 1.0;
1100 /* adjust min and max values */
1101 if (isnan(im->minval)
1102 /* don't adjust low-end with log scale */
1103 || ((!im->logarithmic && !im->rigid) && im->minval > minval)
1105 im->minval = minval;
1106 if (isnan(im->maxval)
1107 || (!im->rigid && im->maxval < maxval)
1109 if (im->logarithmic)
1110 im->maxval = maxval * 1.1;
1112 im->maxval = maxval;
1114 /* make sure min is smaller than max */
1115 if (im->minval > im->maxval) {
1116 im->minval = 0.99 * im->maxval;
1119 /* make sure min and max are not equal */
1120 if (im->minval == im->maxval) {
1122 if (! im->logarithmic) {
1125 /* make sure min and max are not both zero */
1126 if (im->maxval == 0.0) {
1135 /* identify the point where the first gridline, label ... gets placed */
1139 time_t start, /* what is the initial time */
1140 enum tmt_en baseint, /* what is the basic interval */
1141 long basestep /* how many if these do we jump a time */
1145 localtime_r(&start, &tm);
1148 tm.tm_sec -= tm.tm_sec % basestep; break;
1151 tm.tm_min -= tm.tm_min % basestep;
1156 tm.tm_hour -= tm.tm_hour % basestep; break;
1158 /* we do NOT look at the basestep for this ... */
1161 tm.tm_hour = 0; break;
1163 /* we do NOT look at the basestep for this ... */
1167 tm.tm_mday -= tm.tm_wday -1; /* -1 because we want the monday */
1168 if (tm.tm_wday==0) tm.tm_mday -= 7; /* we want the *previous* monday */
1175 tm.tm_mon -= tm.tm_mon % basestep; break;
1183 tm.tm_year -= (tm.tm_year+1900) % basestep;
1188 /* identify the point where the next gridline, label ... gets placed */
1191 time_t current, /* what is the initial time */
1192 enum tmt_en baseint, /* what is the basic interval */
1193 long basestep /* how many if these do we jump a time */
1198 localtime_r(¤t, &tm);
1202 tm.tm_sec += basestep; break;
1204 tm.tm_min += basestep; break;
1206 tm.tm_hour += basestep; break;
1208 tm.tm_mday += basestep; break;
1210 tm.tm_mday += 7*basestep; break;
1212 tm.tm_mon += basestep; break;
1214 tm.tm_year += basestep;
1216 madetime = mktime(&tm);
1217 } while (madetime == -1); /* this is necessary to skip impssible times
1218 like the daylight saving time skips */
1224 /* calculate values required for PRINT and GPRINT functions */
1227 print_calc(image_desc_t *im, char ***prdata)
1229 long i,ii,validsteps;
1232 int graphelement = 0;
1235 double magfact = -1;
1239 if (im->imginfo) prlines++;
1240 for(i=0;i<im->gdes_c;i++){
1241 switch(im->gdes[i].gf){
1244 if(((*prdata) = rrd_realloc((*prdata),prlines*sizeof(char *)))==NULL){
1245 rrd_set_error("realloc prdata");
1249 /* PRINT and GPRINT can now print VDEF generated values.
1250 * There's no need to do any calculations on them as these
1251 * calculations were already made.
1253 vidx = im->gdes[i].vidx;
1254 if (im->gdes[vidx].gf==GF_VDEF) { /* simply use vals */
1255 printval = im->gdes[vidx].vf.val;
1256 printtime = im->gdes[vidx].vf.when;
1257 } else { /* need to calculate max,min,avg etcetera */
1258 max_ii =((im->gdes[vidx].end
1259 - im->gdes[vidx].start)
1260 / im->gdes[vidx].step
1261 * im->gdes[vidx].ds_cnt);
1264 for( ii=im->gdes[vidx].ds;
1266 ii+=im->gdes[vidx].ds_cnt){
1267 if (! finite(im->gdes[vidx].data[ii]))
1269 if (isnan(printval)){
1270 printval = im->gdes[vidx].data[ii];
1275 switch (im->gdes[i].cf){
1278 case CF_DEVSEASONAL:
1282 printval += im->gdes[vidx].data[ii];
1285 printval = min( printval, im->gdes[vidx].data[ii]);
1289 printval = max( printval, im->gdes[vidx].data[ii]);
1292 printval = im->gdes[vidx].data[ii];
1295 if (im->gdes[i].cf==CF_AVERAGE || im->gdes[i].cf > CF_LAST) {
1296 if (validsteps > 1) {
1297 printval = (printval / validsteps);
1300 } /* prepare printval */
1302 if (!strcmp(im->gdes[i].format,"%c")) { /* VDEF time print */
1303 char ctime_buf[128]; /* PS: for ctime_r, must be >= 26 chars */
1305 ctime_r(&printtime,ctime_buf);
1306 while(isprint(ctime_buf[iii])){iii++;}
1307 ctime_buf[iii]='\0';
1308 if (im->gdes[i].gf == GF_PRINT){
1309 (*prdata)[prlines-2] = malloc((FMT_LEG_LEN+2)*sizeof(char));
1310 sprintf((*prdata)[prlines-2],"%s (%lu)",ctime_buf,printtime);
1311 (*prdata)[prlines-1] = NULL;
1313 sprintf(im->gdes[i].legend,"%s (%lu)",ctime_buf,printtime);
1317 if ((percent_s = strstr(im->gdes[i].format,"%S")) != NULL) {
1318 /* Magfact is set to -1 upon entry to print_calc. If it
1319 * is still less than 0, then we need to run auto_scale.
1320 * Otherwise, put the value into the correct units. If
1321 * the value is 0, then do not set the symbol or magnification
1322 * so next the calculation will be performed again. */
1323 if (magfact < 0.0) {
1324 auto_scale(im,&printval,&si_symb,&magfact);
1325 if (printval == 0.0)
1328 printval /= magfact;
1330 *(++percent_s) = 's';
1331 } else if (strstr(im->gdes[i].format,"%s") != NULL) {
1332 auto_scale(im,&printval,&si_symb,&magfact);
1335 if (im->gdes[i].gf == GF_PRINT){
1336 (*prdata)[prlines-2] = malloc((FMT_LEG_LEN+2)*sizeof(char));
1337 (*prdata)[prlines-1] = NULL;
1338 if (bad_format(im->gdes[i].format)) {
1339 rrd_set_error("bad format for PRINT in '%s'", im->gdes[i].format);
1342 #ifdef HAVE_SNPRINTF
1343 snprintf((*prdata)[prlines-2],FMT_LEG_LEN,im->gdes[i].format,printval,si_symb);
1345 sprintf((*prdata)[prlines-2],im->gdes[i].format,printval,si_symb);
1350 if (bad_format(im->gdes[i].format)) {
1351 rrd_set_error("bad format for GPRINT in '%s'", im->gdes[i].format);
1354 #ifdef HAVE_SNPRINTF
1355 snprintf(im->gdes[i].legend,FMT_LEG_LEN-2,im->gdes[i].format,printval,si_symb);
1357 sprintf(im->gdes[i].legend,im->gdes[i].format,printval,si_symb);
1374 #ifdef WITH_PIECHART
1381 rrd_set_error("STACK should already be turned into LINE or AREA here");
1386 return graphelement;
1390 /* place legends with color spots */
1392 leg_place(image_desc_t *im)
1395 int interleg = im->text_prop[TEXT_PROP_LEGEND].size*2.0;
1396 int border = im->text_prop[TEXT_PROP_LEGEND].size*2.0;
1397 int fill=0, fill_last;
1399 int leg_x = border, leg_y = im->yimg;
1403 char prt_fctn; /*special printfunctions */
1406 if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
1407 if ((legspace = malloc(im->gdes_c*sizeof(int)))==NULL){
1408 rrd_set_error("malloc for legspace");
1412 for(i=0;i<im->gdes_c;i++){
1415 /* hid legends for rules which are not displayed */
1417 if(!(im->extra_flags & FORCE_RULES_LEGEND)) {
1418 if (im->gdes[i].gf == GF_HRULE &&
1419 (im->gdes[i].yrule < im->minval || im->gdes[i].yrule > im->maxval))
1420 im->gdes[i].legend[0] = '\0';
1422 if (im->gdes[i].gf == GF_VRULE &&
1423 (im->gdes[i].xrule < im->start || im->gdes[i].xrule > im->end))
1424 im->gdes[i].legend[0] = '\0';
1427 leg_cc = strlen(im->gdes[i].legend);
1429 /* is there a controle code ant the end of the legend string ? */
1430 /* and it is not a tab \\t */
1431 if (leg_cc >= 2 && im->gdes[i].legend[leg_cc-2] == '\\' && im->gdes[i].legend[leg_cc-1] != 't') {
1432 prt_fctn = im->gdes[i].legend[leg_cc-1];
1434 im->gdes[i].legend[leg_cc] = '\0';
1438 /* remove exess space */
1439 while (prt_fctn=='g' &&
1441 im->gdes[i].legend[leg_cc-1]==' '){
1443 im->gdes[i].legend[leg_cc]='\0';
1446 legspace[i]=(prt_fctn=='g' ? 0 : interleg);
1449 /* no interleg space if string ends in \g */
1450 fill += legspace[i];
1452 fill += gfx_get_text_width(im->canvas, fill+border,
1453 im->text_prop[TEXT_PROP_LEGEND].font,
1454 im->text_prop[TEXT_PROP_LEGEND].size,
1456 im->gdes[i].legend, 0);
1461 /* who said there was a special tag ... ?*/
1462 if (prt_fctn=='g') {
1465 if (prt_fctn == '\0') {
1466 if (i == im->gdes_c -1 ) prt_fctn ='l';
1468 /* is it time to place the legends ? */
1469 if (fill > im->ximg - 2*border){
1484 if (prt_fctn != '\0'){
1486 if (leg_c >= 2 && prt_fctn == 'j') {
1487 glue = (im->ximg - fill - 2* border) / (leg_c-1);
1491 if (prt_fctn =='c') leg_x = (im->ximg - fill) / 2.0;
1492 if (prt_fctn =='r') leg_x = im->ximg - fill - border;
1494 for(ii=mark;ii<=i;ii++){
1495 if(im->gdes[ii].legend[0]=='\0')
1496 continue; /* skip empty legends */
1497 im->gdes[ii].leg_x = leg_x;
1498 im->gdes[ii].leg_y = leg_y;
1500 gfx_get_text_width(im->canvas, leg_x,
1501 im->text_prop[TEXT_PROP_LEGEND].font,
1502 im->text_prop[TEXT_PROP_LEGEND].size,
1504 im->gdes[ii].legend, 0)
1508 leg_y += im->text_prop[TEXT_PROP_LEGEND].size*1.8;
1509 if (prt_fctn == 's') leg_y -= im->text_prop[TEXT_PROP_LEGEND].size;
1521 /* create a grid on the graph. it determines what to do
1522 from the values of xsize, start and end */
1524 /* the xaxis labels are determined from the number of seconds per pixel
1525 in the requested graph */
1530 calc_horizontal_grid(image_desc_t *im)
1536 int decimals, fractionals;
1538 im->ygrid_scale.labfact=2;
1539 range = im->maxval - im->minval;
1540 scaledrange = range / im->magfact;
1542 /* does the scale of this graph make it impossible to put lines
1543 on it? If so, give up. */
1544 if (isnan(scaledrange)) {
1548 /* find grid spaceing */
1550 if(isnan(im->ygridstep)){
1551 if(im->extra_flags & ALTYGRID) {
1552 /* find the value with max number of digits. Get number of digits */
1553 decimals = ceil(log10(max(fabs(im->maxval), fabs(im->minval))*im->viewfactor/im->magfact));
1554 if(decimals <= 0) /* everything is small. make place for zero */
1557 im->ygrid_scale.gridstep = pow((double)10, floor(log10(range*im->viewfactor/im->magfact)))/im->viewfactor*im->magfact;
1559 if(im->ygrid_scale.gridstep == 0) /* range is one -> 0.1 is reasonable scale */
1560 im->ygrid_scale.gridstep = 0.1;
1561 /* should have at least 5 lines but no more then 15 */
1562 if(range/im->ygrid_scale.gridstep < 5)
1563 im->ygrid_scale.gridstep /= 10;
1564 if(range/im->ygrid_scale.gridstep > 15)
1565 im->ygrid_scale.gridstep *= 10;
1566 if(range/im->ygrid_scale.gridstep > 5) {
1567 im->ygrid_scale.labfact = 1;
1568 if(range/im->ygrid_scale.gridstep > 8)
1569 im->ygrid_scale.labfact = 2;
1572 im->ygrid_scale.gridstep /= 5;
1573 im->ygrid_scale.labfact = 5;
1575 fractionals = floor(log10(im->ygrid_scale.gridstep*(double)im->ygrid_scale.labfact*im->viewfactor/im->magfact));
1576 if(fractionals < 0) { /* small amplitude. */
1577 int len = decimals - fractionals + 1;
1578 if (im->unitslength < len+2) im->unitslength = len+2;
1579 sprintf(im->ygrid_scale.labfmt, "%%%d.%df%s", len, -fractionals,(im->symbol != ' ' ? " %c" : ""));
1581 int len = decimals + 1;
1582 if (im->unitslength < len+2) im->unitslength = len+2;
1583 sprintf(im->ygrid_scale.labfmt, "%%%d.0f%s", len, ( im->symbol != ' ' ? " %c" : "" ));
1587 for(i=0;ylab[i].grid > 0;i++){
1588 pixel = im->ysize / (scaledrange / ylab[i].grid);
1595 if (pixel * ylab[gridind].lfac[i] >= 2.5 * im->text_prop[TEXT_PROP_AXIS].size) {
1596 im->ygrid_scale.labfact = ylab[gridind].lfac[i];
1601 im->ygrid_scale.gridstep = ylab[gridind].grid * im->magfact;
1604 im->ygrid_scale.gridstep = im->ygridstep;
1605 im->ygrid_scale.labfact = im->ylabfact;
1610 int draw_horizontal_grid(image_desc_t *im)
1614 char graph_label[100];
1615 double X0=im->xorigin;
1616 double X1=im->xorigin+im->xsize;
1618 int sgrid = (int)( im->minval / im->ygrid_scale.gridstep - 1);
1619 int egrid = (int)( im->maxval / im->ygrid_scale.gridstep + 1);
1621 scaledstep = im->ygrid_scale.gridstep/(double)im->magfact*(double)im->viewfactor;
1622 MaxY = scaledstep*(double)egrid;
1623 for (i = sgrid; i <= egrid; i++){
1624 double Y0=ytr(im,im->ygrid_scale.gridstep*i);
1625 if ( Y0 >= im->yorigin-im->ysize
1626 && Y0 <= im->yorigin){
1627 if(i % im->ygrid_scale.labfact == 0){
1628 if (im->symbol == ' ') {
1629 if(im->extra_flags & ALTYGRID) {
1630 sprintf(graph_label,im->ygrid_scale.labfmt,scaledstep*(double)i);
1633 sprintf(graph_label,"%4.1f",scaledstep*(double)i);
1635 sprintf(graph_label,"%4.0f",scaledstep*(double)i);
1639 char sisym = ( i == 0 ? ' ' : im->symbol);
1640 if(im->extra_flags & ALTYGRID) {
1641 sprintf(graph_label,im->ygrid_scale.labfmt,scaledstep*(double)i,sisym);
1644 sprintf(graph_label,"%4.1f %c",scaledstep*(double)i, sisym);
1646 sprintf(graph_label,"%4.0f %c",scaledstep*(double)i, sisym);
1651 gfx_new_text ( im->canvas,
1652 X0-im->text_prop[TEXT_PROP_AXIS].size, Y0,
1653 im->graph_col[GRC_FONT],
1654 im->text_prop[TEXT_PROP_AXIS].font,
1655 im->text_prop[TEXT_PROP_AXIS].size,
1656 im->tabwidth, 0.0, GFX_H_RIGHT, GFX_V_CENTER,
1658 gfx_new_dashed_line ( im->canvas,
1661 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1662 im->grid_dash_on, im->grid_dash_off);
1664 } else if (!(im->extra_flags & NOMINOR)) {
1665 gfx_new_dashed_line ( im->canvas,
1668 GRIDWIDTH, im->graph_col[GRC_GRID],
1669 im->grid_dash_on, im->grid_dash_off);
1677 /* logaritmic horizontal grid */
1679 horizontal_log_grid(image_desc_t *im)
1683 int minoridx=0, majoridx=0;
1684 char graph_label[100];
1686 double value, pixperstep, minstep;
1688 /* find grid spaceing */
1689 pixpex= (double)im->ysize / (log10(im->maxval) - log10(im->minval));
1691 if (isnan(pixpex)) {
1695 for(i=0;yloglab[i][0] > 0;i++){
1696 minstep = log10(yloglab[i][0]);
1697 for(ii=1;yloglab[i][ii+1] > 0;ii++){
1698 if(yloglab[i][ii+2]==0){
1699 minstep = log10(yloglab[i][ii+1])-log10(yloglab[i][ii]);
1703 pixperstep = pixpex * minstep;
1704 if(pixperstep > 5){minoridx = i;}
1705 if(pixperstep > 2 * im->text_prop[TEXT_PROP_LEGEND].size){majoridx = i;}
1709 X1=im->xorigin+im->xsize;
1710 /* paint minor grid */
1711 for (value = pow((double)10, log10(im->minval)
1712 - fmod(log10(im->minval),log10(yloglab[minoridx][0])));
1713 value <= im->maxval;
1714 value *= yloglab[minoridx][0]){
1715 if (value < im->minval) continue;
1717 while(yloglab[minoridx][++i] > 0){
1718 Y0 = ytr(im,value * yloglab[minoridx][i]);
1719 if (Y0 <= im->yorigin - im->ysize) break;
1720 gfx_new_dashed_line ( im->canvas,
1723 GRIDWIDTH, im->graph_col[GRC_GRID],
1724 im->grid_dash_on, im->grid_dash_off);
1728 /* paint major grid and labels*/
1729 for (value = pow((double)10, log10(im->minval)
1730 - fmod(log10(im->minval),log10(yloglab[majoridx][0])));
1731 value <= im->maxval;
1732 value *= yloglab[majoridx][0]){
1733 if (value < im->minval) continue;
1735 while(yloglab[majoridx][++i] > 0){
1736 Y0 = ytr(im,value * yloglab[majoridx][i]);
1737 if (Y0 <= im->yorigin - im->ysize) break;
1738 gfx_new_dashed_line ( im->canvas,
1741 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1742 im->grid_dash_on, im->grid_dash_off);
1744 sprintf(graph_label,"%3.0e",value * yloglab[majoridx][i]);
1745 gfx_new_text ( im->canvas,
1746 X0-im->text_prop[TEXT_PROP_AXIS].size, Y0,
1747 im->graph_col[GRC_FONT],
1748 im->text_prop[TEXT_PROP_AXIS].font,
1749 im->text_prop[TEXT_PROP_AXIS].size,
1750 im->tabwidth,0.0, GFX_H_RIGHT, GFX_V_CENTER,
1762 int xlab_sel; /* which sort of label and grid ? */
1763 time_t ti, tilab, timajor;
1765 char graph_label[100];
1766 double X0,Y0,Y1; /* points for filled graph and more*/
1769 /* the type of time grid is determined by finding
1770 the number of seconds per pixel in the graph */
1773 if(im->xlab_user.minsec == -1){
1774 factor=(im->end - im->start)/im->xsize;
1776 while ( xlab[xlab_sel+1].minsec != -1
1777 && xlab[xlab_sel+1].minsec <= factor) { xlab_sel++; } /* pick the last one */
1778 while ( xlab[xlab_sel-1].minsec == xlab[xlab_sel].minsec
1779 && xlab[xlab_sel].length > (im->end - im->start)) { xlab_sel--; } /* go back to the smallest size */
1780 im->xlab_user.gridtm = xlab[xlab_sel].gridtm;
1781 im->xlab_user.gridst = xlab[xlab_sel].gridst;
1782 im->xlab_user.mgridtm = xlab[xlab_sel].mgridtm;
1783 im->xlab_user.mgridst = xlab[xlab_sel].mgridst;
1784 im->xlab_user.labtm = xlab[xlab_sel].labtm;
1785 im->xlab_user.labst = xlab[xlab_sel].labst;
1786 im->xlab_user.precis = xlab[xlab_sel].precis;
1787 im->xlab_user.stst = xlab[xlab_sel].stst;
1790 /* y coords are the same for every line ... */
1792 Y1 = im->yorigin-im->ysize;
1795 /* paint the minor grid */
1796 if (!(im->extra_flags & NOMINOR))
1798 for(ti = find_first_time(im->start,
1799 im->xlab_user.gridtm,
1800 im->xlab_user.gridst),
1801 timajor = find_first_time(im->start,
1802 im->xlab_user.mgridtm,
1803 im->xlab_user.mgridst);
1805 ti = find_next_time(ti,im->xlab_user.gridtm,im->xlab_user.gridst)
1807 /* are we inside the graph ? */
1808 if (ti < im->start || ti > im->end) continue;
1809 while (timajor < ti) {
1810 timajor = find_next_time(timajor,
1811 im->xlab_user.mgridtm, im->xlab_user.mgridst);
1813 if (ti == timajor) continue; /* skip as falls on major grid line */
1815 gfx_new_dashed_line(im->canvas,X0,Y0+1, X0,Y1-1,GRIDWIDTH,
1816 im->graph_col[GRC_GRID],
1817 im->grid_dash_on, im->grid_dash_off);
1822 /* paint the major grid */
1823 for(ti = find_first_time(im->start,
1824 im->xlab_user.mgridtm,
1825 im->xlab_user.mgridst);
1827 ti = find_next_time(ti,im->xlab_user.mgridtm,im->xlab_user.mgridst)
1829 /* are we inside the graph ? */
1830 if (ti < im->start || ti > im->end) continue;
1832 gfx_new_dashed_line(im->canvas,X0,Y0+3, X0,Y1-2,MGRIDWIDTH,
1833 im->graph_col[GRC_MGRID],
1834 im->grid_dash_on, im->grid_dash_off);
1837 /* paint the labels below the graph */
1838 for(ti = find_first_time(im->start - im->xlab_user.precis/2,
1839 im->xlab_user.labtm,
1840 im->xlab_user.labst);
1841 ti <= im->end - im->xlab_user.precis/2;
1842 ti = find_next_time(ti,im->xlab_user.labtm,im->xlab_user.labst)
1844 tilab= ti + im->xlab_user.precis/2; /* correct time for the label */
1845 /* are we inside the graph ? */
1846 if (tilab < im->start || tilab > im->end) continue;
1849 localtime_r(&tilab, &tm);
1850 strftime(graph_label,99,im->xlab_user.stst, &tm);
1852 # error "your libc has no strftime I guess we'll abort the exercise here."
1854 gfx_new_text ( im->canvas,
1855 xtr(im,tilab), Y0+im->text_prop[TEXT_PROP_AXIS].size*1.4+5,
1856 im->graph_col[GRC_FONT],
1857 im->text_prop[TEXT_PROP_AXIS].font,
1858 im->text_prop[TEXT_PROP_AXIS].size,
1859 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_BOTTOM,
1872 /* draw x and y axis */
1873 /* gfx_new_line ( im->canvas, im->xorigin+im->xsize,im->yorigin,
1874 im->xorigin+im->xsize,im->yorigin-im->ysize,
1875 GRIDWIDTH, im->graph_col[GRC_AXIS]);
1877 gfx_new_line ( im->canvas, im->xorigin,im->yorigin-im->ysize,
1878 im->xorigin+im->xsize,im->yorigin-im->ysize,
1879 GRIDWIDTH, im->graph_col[GRC_AXIS]); */
1881 gfx_new_line ( im->canvas, im->xorigin-4,im->yorigin,
1882 im->xorigin+im->xsize+4,im->yorigin,
1883 MGRIDWIDTH, im->graph_col[GRC_AXIS]);
1885 gfx_new_line ( im->canvas, im->xorigin,im->yorigin+4,
1886 im->xorigin,im->yorigin-im->ysize-4,
1887 MGRIDWIDTH, im->graph_col[GRC_AXIS]);
1890 /* arrow for X and Y axis direction */
1891 gfx_new_area ( im->canvas,
1892 im->xorigin+im->xsize+2, im->yorigin-2,
1893 im->xorigin+im->xsize+2, im->yorigin+3,
1894 im->xorigin+im->xsize+7, im->yorigin+0.5, /* LINEOFFSET */
1895 im->graph_col[GRC_ARROW]);
1897 gfx_new_area ( im->canvas,
1898 im->xorigin-2, im->yorigin-im->ysize-2,
1899 im->xorigin+3, im->yorigin-im->ysize-2,
1900 im->xorigin+0.5, im->yorigin-im->ysize-7, /* LINEOFFSET */
1901 im->graph_col[GRC_ARROW]);
1906 grid_paint(image_desc_t *im)
1910 double X0,Y0; /* points for filled graph and more*/
1913 /* draw 3d border */
1914 node = gfx_new_area (im->canvas, 0,im->yimg,
1916 2,2,im->graph_col[GRC_SHADEA]);
1917 gfx_add_point( node , im->ximg - 2, 2 );
1918 gfx_add_point( node , im->ximg, 0 );
1919 gfx_add_point( node , 0,0 );
1920 /* gfx_add_point( node , 0,im->yimg ); */
1922 node = gfx_new_area (im->canvas, 2,im->yimg-2,
1923 im->ximg-2,im->yimg-2,
1925 im->graph_col[GRC_SHADEB]);
1926 gfx_add_point( node , im->ximg,0);
1927 gfx_add_point( node , im->ximg,im->yimg);
1928 gfx_add_point( node , 0,im->yimg);
1929 /* gfx_add_point( node , 0,im->yimg ); */
1932 if (im->draw_x_grid == 1 )
1935 if (im->draw_y_grid == 1){
1936 if(im->logarithmic){
1937 res = horizontal_log_grid(im);
1939 res = draw_horizontal_grid(im);
1942 /* dont draw horizontal grid if there is no min and max val */
1944 char *nodata = "No Data found";
1945 gfx_new_text(im->canvas,im->ximg/2, (2*im->yorigin-im->ysize) / 2,
1946 im->graph_col[GRC_FONT],
1947 im->text_prop[TEXT_PROP_AXIS].font,
1948 im->text_prop[TEXT_PROP_AXIS].size,
1949 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_CENTER,
1954 /* yaxis unit description */
1955 gfx_new_text( im->canvas,
1956 10, (im->yorigin - im->ysize/2),
1957 im->graph_col[GRC_FONT],
1958 im->text_prop[TEXT_PROP_UNIT].font,
1959 im->text_prop[TEXT_PROP_UNIT].size, im->tabwidth,
1960 RRDGRAPH_YLEGEND_ANGLE,
1961 GFX_H_LEFT, GFX_V_CENTER,
1965 gfx_new_text( im->canvas,
1966 im->ximg/2, im->text_prop[TEXT_PROP_TITLE].size*1.3+4,
1967 im->graph_col[GRC_FONT],
1968 im->text_prop[TEXT_PROP_TITLE].font,
1969 im->text_prop[TEXT_PROP_TITLE].size, im->tabwidth, 0.0,
1970 GFX_H_CENTER, GFX_V_CENTER,
1972 /* rrdtool 'logo' */
1973 gfx_new_text( im->canvas,
1975 ( im->graph_col[GRC_FONT] & 0xffffff00 ) | 0x00000044,
1976 im->text_prop[TEXT_PROP_AXIS].font,
1977 5.5, im->tabwidth, 270,
1978 GFX_H_RIGHT, GFX_V_TOP,
1979 "RRDTOOL / TOBI OETIKER");
1982 if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
1983 for(i=0;i<im->gdes_c;i++){
1984 if(im->gdes[i].legend[0] =='\0')
1987 /* im->gdes[i].leg_y is the bottom of the legend */
1988 X0 = im->gdes[i].leg_x;
1989 Y0 = im->gdes[i].leg_y;
1990 gfx_new_text ( im->canvas, X0, Y0,
1991 im->graph_col[GRC_FONT],
1992 im->text_prop[TEXT_PROP_LEGEND].font,
1993 im->text_prop[TEXT_PROP_LEGEND].size,
1994 im->tabwidth,0.0, GFX_H_LEFT, GFX_V_BOTTOM,
1995 im->gdes[i].legend );
1996 /* The legend for GRAPH items starts with "M " to have
1997 enough space for the box */
1998 if ( im->gdes[i].gf != GF_PRINT &&
1999 im->gdes[i].gf != GF_GPRINT &&
2000 im->gdes[i].gf != GF_COMMENT) {
2003 boxH = gfx_get_text_width(im->canvas, 0,
2004 im->text_prop[TEXT_PROP_LEGEND].font,
2005 im->text_prop[TEXT_PROP_LEGEND].size,
2006 im->tabwidth,"o", 0) * 1.2;
2009 /* make sure transparent colors show up the same way as in the graph */
2010 node = gfx_new_area(im->canvas,
2014 im->graph_col[GRC_BACK]);
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 1.0,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;
2166 if (im->ylegend[0] != '\0' ) {
2167 Xvertical = im->text_prop[TEXT_PROP_UNIT].size *2;
2171 if (im->title[0] != '\0') {
2172 /* The title is placed "inbetween" two text lines so it
2173 ** automatically has some vertical spacing. The horizontal
2174 ** spacing is added here, on each side.
2176 /* don't care for the with of the title
2177 Xtitle = gfx_get_text_width(im->canvas, 0,
2178 im->text_prop[TEXT_PROP_TITLE].font,
2179 im->text_prop[TEXT_PROP_TITLE].size,
2181 im->title, 0) + 2*Xspacing; */
2182 Ytitle = im->text_prop[TEXT_PROP_TITLE].size*2.6+10;
2188 if (im->draw_x_grid) {
2189 Yxlabel=im->text_prop[TEXT_PROP_AXIS].size *2.5;
2191 if (im->draw_y_grid) {
2192 Xylabel=gfx_get_text_width(im->canvas, 0,
2193 im->text_prop[TEXT_PROP_AXIS].font,
2194 im->text_prop[TEXT_PROP_AXIS].size,
2196 "0", 0) * im->unitslength;
2200 #ifdef WITH_PIECHART
2202 im->piesize=im->xsize<im->ysize?im->xsize:im->ysize;
2208 /* Now calculate the total size. Insert some spacing where
2209 desired. im->xorigin and im->yorigin need to correspond
2210 with the lower left corner of the main graph area or, if
2211 this one is not set, the imaginary box surrounding the
2214 /* The legend width cannot yet be determined, as a result we
2215 ** have problems adjusting the image to it. For now, we just
2216 ** forget about it at all; the legend will have to fit in the
2217 ** size already allocated.
2219 im->ximg = Xylabel + Xmain + 2 * Xspacing;
2221 #ifdef WITH_PIECHART
2225 if (Xmain) im->ximg += Xspacing;
2226 #ifdef WITH_PIECHART
2227 if (Xpie) im->ximg += Xspacing;
2230 im->xorigin = Xspacing + Xylabel;
2232 /* the length of the title should not influence with width of the graph
2233 if (Xtitle > im->ximg) im->ximg = Xtitle; */
2235 if (Xvertical) { /* unit description */
2236 im->ximg += Xvertical;
2237 im->xorigin += Xvertical;
2241 /* The vertical size is interesting... we need to compare
2242 ** the sum of {Ytitle, Ymain, Yxlabel, Ylegend} with Yvertical
2243 ** however we need to know {Ytitle+Ymain+Yxlabel} in order to
2244 ** start even thinking about Ylegend.
2246 ** Do it in three portions: First calculate the inner part,
2247 ** then do the legend, then adjust the total height of the img.
2250 /* reserve space for main and/or pie */
2252 im->yimg = Ymain + Yxlabel;
2254 #ifdef WITH_PIECHART
2255 if (im->yimg < Ypie) im->yimg = Ypie;
2258 im->yorigin = im->yimg - Yxlabel;
2260 /* reserve space for the title *or* some padding above the graph */
2263 im->yorigin += Ytitle;
2265 im->yimg += 1.5*Yspacing;
2266 im->yorigin += 1.5*Yspacing;
2268 /* reserve space for padding below the graph */
2269 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;
2303 /* from http://www.cygnus-software.com/papers/comparingfloats/comparingfloats.htm */
2304 /* yes we are loosing precision by doing tos with floats instead of doubles
2305 but it seems more stable this way. */
2307 static int AlmostEqual2sComplement (float A, float B, int maxUlps)
2310 int aInt = *(int*)&A;
2311 int bInt = *(int*)&B;
2313 /* Make sure maxUlps is non-negative and small enough that the
2314 default NAN won't compare as equal to anything. */
2316 /* assert(maxUlps > 0 && maxUlps < 4 * 1024 * 1024); */
2318 /* Make aInt lexicographically ordered as a twos-complement int */
2321 aInt = 0x80000000l - aInt;
2323 /* Make bInt lexicographically ordered as a twos-complement int */
2326 bInt = 0x80000000l - bInt;
2328 intDiff = abs(aInt - bInt);
2330 if (intDiff <= maxUlps)
2336 /* draw that picture thing ... */
2338 graph_paint(image_desc_t *im, char ***calcpr)
2341 int lazy = lazy_check(im);
2342 #ifdef WITH_PIECHART
2344 double PieStart=0.0;
2349 double areazero = 0.0;
2350 graph_desc_t *lastgdes = NULL;
2352 /* if we are lazy and there is nothing to PRINT ... quit now */
2353 if (lazy && im->prt_c==0) return 0;
2355 /* pull the data from the rrd files ... */
2357 if(data_fetch(im)==-1)
2360 /* evaluate VDEF and CDEF operations ... */
2361 if(data_calc(im)==-1)
2364 #ifdef WITH_PIECHART
2365 /* check if we need to draw a piechart */
2366 for(i=0;i<im->gdes_c;i++){
2367 if (im->gdes[i].gf == GF_PART) {
2374 /* calculate and PRINT and GPRINT definitions. We have to do it at
2375 * this point because it will affect the length of the legends
2376 * if there are no graph elements we stop here ...
2377 * if we are lazy, try to quit ...
2379 i=print_calc(im,calcpr);
2382 #ifdef WITH_PIECHART
2385 ) || lazy) return 0;
2387 #ifdef WITH_PIECHART
2388 /* If there's only the pie chart to draw, signal this */
2389 if (i==0) piechart=2;
2392 /* get actual drawing data and find min and max values*/
2393 if(data_proc(im)==-1)
2396 if(!im->logarithmic){si_unit(im);} /* identify si magnitude Kilo, Mega Giga ? */
2398 if(!im->rigid && ! im->logarithmic)
2399 expand_range(im); /* make sure the upper and lower limit are
2402 if (!calc_horizontal_grid(im))
2409 /**************************************************************
2410 *** Calculating sizes and locations became a bit confusing ***
2411 *** so I moved this into a separate function. ***
2412 **************************************************************/
2413 if(graph_size_location(im,i
2414 #ifdef WITH_PIECHART
2420 /* the actual graph is created by going through the individual
2421 graph elements and then drawing them */
2423 node=gfx_new_area ( im->canvas,
2427 im->graph_col[GRC_BACK]);
2429 gfx_add_point(node,im->ximg, 0);
2431 #ifdef WITH_PIECHART
2432 if (piechart != 2) {
2434 node=gfx_new_area ( im->canvas,
2435 im->xorigin, im->yorigin,
2436 im->xorigin + im->xsize, im->yorigin,
2437 im->xorigin + im->xsize, im->yorigin-im->ysize,
2438 im->graph_col[GRC_CANVAS]);
2440 gfx_add_point(node,im->xorigin, im->yorigin - im->ysize);
2442 if (im->minval > 0.0)
2443 areazero = im->minval;
2444 if (im->maxval < 0.0)
2445 areazero = im->maxval;
2446 #ifdef WITH_PIECHART
2450 #ifdef WITH_PIECHART
2452 pie_part(im,im->graph_col[GRC_CANVAS],im->pie_x,im->pie_y,im->piesize*0.5,0,2*M_PI);
2456 for(i=0;i<im->gdes_c;i++){
2457 switch(im->gdes[i].gf){
2470 for (ii = 0; ii < im->xsize; ii++)
2472 if (!isnan(im->gdes[i].p_data[ii]) &&
2473 im->gdes[i].p_data[ii] != 0.0)
2475 if (im -> gdes[i].yrule > 0 ) {
2476 gfx_new_line(im->canvas,
2477 im -> xorigin + ii, im->yorigin,
2478 im -> xorigin + ii, im->yorigin - im -> gdes[i].yrule * im -> ysize,
2480 im -> gdes[i].col );
2481 } else if ( im -> gdes[i].yrule < 0 ) {
2482 gfx_new_line(im->canvas,
2483 im -> xorigin + ii, im->yorigin - im -> ysize,
2484 im -> xorigin + ii, im->yorigin - ( 1 - im -> gdes[i].yrule ) * im -> ysize,
2486 im -> gdes[i].col );
2494 /* fix data points at oo and -oo */
2495 for(ii=0;ii<im->xsize;ii++){
2496 if (isinf(im->gdes[i].p_data[ii])){
2497 if (im->gdes[i].p_data[ii] > 0) {
2498 im->gdes[i].p_data[ii] = im->maxval ;
2500 im->gdes[i].p_data[ii] = im->minval ;
2506 /* *******************************************************
2511 -------|--t-1--t--------------------------------
2513 if we know the value at time t was a then
2514 we draw a square from t-1 to t with the value a.
2516 ********************************************************* */
2517 if (im->gdes[i].col != 0x0){
2518 /* GF_LINE and friend */
2519 if(im->gdes[i].gf == GF_LINE ){
2522 for(ii=1;ii<im->xsize;ii++){
2523 if (isnan(im->gdes[i].p_data[ii]) || (im->slopemode==1 && isnan(im->gdes[i].p_data[ii-1]))){
2527 if ( node == NULL ) {
2528 last_y = ytr(im,im->gdes[i].p_data[ii]);
2529 if ( im->slopemode == 0 ){
2530 node = gfx_new_line(im->canvas,
2531 ii-1+im->xorigin,last_y,
2532 ii+im->xorigin,last_y,
2533 im->gdes[i].linewidth,
2536 node = gfx_new_line(im->canvas,
2537 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii-1]),
2538 ii+im->xorigin,last_y,
2539 im->gdes[i].linewidth,
2543 double new_y = ytr(im,im->gdes[i].p_data[ii]);
2544 if ( im->slopemode==0 && ! AlmostEqual2sComplement(new_y,last_y,4)){
2545 gfx_add_point(node,ii-1+im->xorigin,new_y);
2548 gfx_add_point(node,ii+im->xorigin,new_y);
2554 double *foreY=malloc(sizeof(double)*im->xsize*2);
2555 double *foreX=malloc(sizeof(double)*im->xsize*2);
2556 double *backY=malloc(sizeof(double)*im->xsize*2);
2557 double *backX=malloc(sizeof(double)*im->xsize*2);
2559 for(ii=0;ii<=im->xsize;ii++){
2561 if ( idxI > 0 && ( drawem != 0 || ii==im->xsize)){
2564 while (cntI < idxI && AlmostEqual2sComplement(foreY[lastI],foreY[cntI],4) && AlmostEqual2sComplement(foreY[lastI],foreY[cntI+1],4)){cntI++;}
2565 node = gfx_new_area(im->canvas,
2568 foreX[cntI],foreY[cntI], im->gdes[i].col);
2569 while (cntI < idxI) {
2572 while ( cntI < idxI && AlmostEqual2sComplement(foreY[lastI],foreY[cntI],4) && AlmostEqual2sComplement(foreY[lastI],foreY[cntI+1],4)){cntI++;}
2573 gfx_add_point(node,foreX[cntI],foreY[cntI]);
2575 gfx_add_point(node,backX[idxI],backY[idxI]);
2579 while ( idxI > 1 && AlmostEqual2sComplement(backY[lastI], backY[idxI],4) && AlmostEqual2sComplement(backY[lastI],backY[idxI-1],4)){idxI--;}
2580 gfx_add_point(node,backX[idxI],backY[idxI]);
2589 if (ii == im->xsize) break;
2591 /* keep things simple for now, just draw these bars
2592 do not try to build a big and complex area */
2595 if ( im->slopemode == 0 && ii==0){
2598 if ( isnan(im->gdes[i].p_data[ii]) ) {
2602 ytop = ytr(im,im->gdes[i].p_data[ii]);
2603 if ( lastgdes && im->gdes[i].stack ) {
2604 ybase = ytr(im,lastgdes->p_data[ii]);
2606 ybase = ytr(im,areazero);
2608 if ( ybase == ytop ){
2612 /* every area has to be wound clock-wise,
2613 so we have to make sur base remains base */
2615 double extra = ytop;
2619 if ( im->slopemode == 0 ){
2620 backY[++idxI] = ybase-0.2;
2621 backX[idxI] = ii+im->xorigin-1;
2622 foreY[idxI] = ytop+0.2;
2623 foreX[idxI] = ii+im->xorigin-1;
2625 backY[++idxI] = ybase-0.2;
2626 backX[idxI] = ii+im->xorigin;
2627 foreY[idxI] = ytop+0.2;
2628 foreX[idxI] = ii+im->xorigin;
2630 /* close up any remaining area */
2635 } /* else GF_LINE */
2636 } /* if color != 0x0 */
2637 /* make sure we do not run into trouble when stacking on NaN */
2638 for(ii=0;ii<im->xsize;ii++){
2639 if (isnan(im->gdes[i].p_data[ii])) {
2640 if (lastgdes && (im->gdes[i].stack)) {
2641 im->gdes[i].p_data[ii] = lastgdes->p_data[ii];
2643 im->gdes[i].p_data[ii] = areazero;
2647 lastgdes = &(im->gdes[i]);
2649 #ifdef WITH_PIECHART
2651 if(isnan(im->gdes[i].yrule)) /* fetch variable */
2652 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2654 if (finite(im->gdes[i].yrule)) { /* even the fetched var can be NaN */
2655 pie_part(im,im->gdes[i].col,
2656 im->pie_x,im->pie_y,im->piesize*0.4,
2657 M_PI*2.0*PieStart/100.0,
2658 M_PI*2.0*(PieStart+im->gdes[i].yrule)/100.0);
2659 PieStart += im->gdes[i].yrule;
2664 rrd_set_error("STACK should already be turned into LINE or AREA here");
2670 #ifdef WITH_PIECHART
2678 /* grid_paint also does the text */
2679 if( !(im->extra_flags & ONLY_GRAPH) )
2683 if( !(im->extra_flags & ONLY_GRAPH) )
2686 /* the RULES are the last thing to paint ... */
2687 for(i=0;i<im->gdes_c;i++){
2689 switch(im->gdes[i].gf){
2691 if(isnan(im->gdes[i].yrule)) { /* fetch variable */
2692 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2694 if(im->gdes[i].yrule >= im->minval
2695 && im->gdes[i].yrule <= im->maxval)
2696 gfx_new_line(im->canvas,
2697 im->xorigin,ytr(im,im->gdes[i].yrule),
2698 im->xorigin+im->xsize,ytr(im,im->gdes[i].yrule),
2699 1.0,im->gdes[i].col);
2702 if(im->gdes[i].xrule == 0) { /* fetch variable */
2703 im->gdes[i].xrule = im->gdes[im->gdes[i].vidx].vf.when;
2705 if(im->gdes[i].xrule >= im->start
2706 && im->gdes[i].xrule <= im->end)
2707 gfx_new_line(im->canvas,
2708 xtr(im,im->gdes[i].xrule),im->yorigin,
2709 xtr(im,im->gdes[i].xrule),im->yorigin-im->ysize,
2710 1.0,im->gdes[i].col);
2718 if (strcmp(im->graphfile,"-")==0) {
2719 fo = im->graphhandle ? im->graphhandle : stdout;
2720 #if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
2721 /* Change translation mode for stdout to BINARY */
2722 _setmode( _fileno( fo ), O_BINARY );
2725 if ((fo = fopen(im->graphfile,"wb")) == NULL) {
2726 rrd_set_error("Opening '%s' for write: %s",im->graphfile,
2727 rrd_strerror(errno));
2731 gfx_render (im->canvas,im->ximg,im->yimg,0x00000000,fo);
2732 if (strcmp(im->graphfile,"-") != 0)
2738 /*****************************************************
2740 *****************************************************/
2743 gdes_alloc(image_desc_t *im){
2746 if ((im->gdes = (graph_desc_t *) rrd_realloc(im->gdes, (im->gdes_c)
2747 * sizeof(graph_desc_t)))==NULL){
2748 rrd_set_error("realloc graph_descs");
2753 im->gdes[im->gdes_c-1].step=im->step;
2754 im->gdes[im->gdes_c-1].step_orig=im->step;
2755 im->gdes[im->gdes_c-1].stack=0;
2756 im->gdes[im->gdes_c-1].linewidth=0;
2757 im->gdes[im->gdes_c-1].debug=0;
2758 im->gdes[im->gdes_c-1].start=im->start;
2759 im->gdes[im->gdes_c-1].end=im->end;
2760 im->gdes[im->gdes_c-1].vname[0]='\0';
2761 im->gdes[im->gdes_c-1].data=NULL;
2762 im->gdes[im->gdes_c-1].ds_namv=NULL;
2763 im->gdes[im->gdes_c-1].data_first=0;
2764 im->gdes[im->gdes_c-1].p_data=NULL;
2765 im->gdes[im->gdes_c-1].rpnp=NULL;
2766 im->gdes[im->gdes_c-1].shift=0;
2767 im->gdes[im->gdes_c-1].col = 0x0;
2768 im->gdes[im->gdes_c-1].legend[0]='\0';
2769 im->gdes[im->gdes_c-1].format[0]='\0';
2770 im->gdes[im->gdes_c-1].rrd[0]='\0';
2771 im->gdes[im->gdes_c-1].ds=-1;
2772 im->gdes[im->gdes_c-1].p_data=NULL;
2773 im->gdes[im->gdes_c-1].yrule=DNAN;
2774 im->gdes[im->gdes_c-1].xrule=0;
2778 /* copies input untill the first unescaped colon is found
2779 or until input ends. backslashes have to be escaped as well */
2781 scan_for_col(const char *const input, int len, char *const output)
2786 input[inp] != ':' &&
2789 if (input[inp] == '\\' &&
2790 input[inp+1] != '\0' &&
2791 (input[inp+1] == '\\' ||
2792 input[inp+1] == ':')){
2793 output[outp++] = input[++inp];
2796 output[outp++] = input[inp];
2799 output[outp] = '\0';
2802 /* Some surgery done on this function, it became ridiculously big.
2804 ** - initializing now in rrd_graph_init()
2805 ** - options parsing now in rrd_graph_options()
2806 ** - script parsing now in rrd_graph_script()
2809 rrd_graph(int argc, char **argv, char ***prdata, int *xsize, int *ysize, FILE *stream, double *ymin, double *ymax)
2812 rrd_graph_init(&im);
2813 im.graphhandle = stream;
2815 rrd_graph_options(argc,argv,&im);
2816 if (rrd_test_error()) {
2821 if (strlen(argv[optind])>=MAXPATH) {
2822 rrd_set_error("filename (including path) too long");
2826 strncpy(im.graphfile,argv[optind],MAXPATH-1);
2827 im.graphfile[MAXPATH-1]='\0';
2829 rrd_graph_script(argc,argv,&im,1);
2830 if (rrd_test_error()) {
2835 /* Everything is now read and the actual work can start */
2838 if (graph_paint(&im,prdata)==-1){
2843 /* The image is generated and needs to be output.
2844 ** Also, if needed, print a line with information about the image.
2854 /* maybe prdata is not allocated yet ... lets do it now */
2855 if ((*prdata = calloc(2,sizeof(char *)))==NULL) {
2856 rrd_set_error("malloc imginfo");
2860 if(((*prdata)[0] = malloc((strlen(im.imginfo)+200+strlen(im.graphfile))*sizeof(char)))
2862 rrd_set_error("malloc imginfo");
2865 filename=im.graphfile+strlen(im.graphfile);
2866 while(filename > im.graphfile) {
2867 if (*(filename-1)=='/' || *(filename-1)=='\\' ) break;
2871 sprintf((*prdata)[0],im.imginfo,filename,(long)(im.canvas->zoom*im.ximg),(long)(im.canvas->zoom*im.yimg));
2878 rrd_graph_init(image_desc_t *im)
2885 #ifdef HAVE_SETLOCALE
2886 setlocale(LC_TIME,"");
2887 #ifdef HAVE_MBSTOWCS
2888 setlocale(LC_CTYPE,"");
2894 im->xlab_user.minsec = -1;
2900 im->ylegend[0] = '\0';
2901 im->title[0] = '\0';
2904 im->unitsexponent= 9999;
2907 im->viewfactor = 1.0;
2914 im->logarithmic = 0;
2915 im->ygridstep = DNAN;
2916 im->draw_x_grid = 1;
2917 im->draw_y_grid = 1;
2922 im->canvas = gfx_new_canvas();
2923 im->grid_dash_on = 1;
2924 im->grid_dash_off = 1;
2925 im->tabwidth = 40.0;
2927 for(i=0;i<DIM(graph_col);i++)
2928 im->graph_col[i]=graph_col[i];
2930 #if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
2933 char rrd_win_default_font[1000];
2934 windir = getenv("windir");
2935 /* %windir% is something like D:\windows or C:\winnt */
2936 if (windir != NULL) {
2937 strncpy(rrd_win_default_font,windir,999);
2938 rrd_win_default_font[999] = '\0';
2939 strcat(rrd_win_default_font,"\\fonts\\");
2940 strcat(rrd_win_default_font,RRD_DEFAULT_FONT);
2941 for(i=0;i<DIM(text_prop);i++){
2942 strncpy(text_prop[i].font,rrd_win_default_font,sizeof(text_prop[i].font)-1);
2943 text_prop[i].font[sizeof(text_prop[i].font)-1] = '\0';
2950 deffont = getenv("RRD_DEFAULT_FONT");
2951 if (deffont != NULL) {
2952 for(i=0;i<DIM(text_prop);i++){
2953 strncpy(text_prop[i].font,deffont,sizeof(text_prop[i].font)-1);
2954 text_prop[i].font[sizeof(text_prop[i].font)-1] = '\0';
2958 for(i=0;i<DIM(text_prop);i++){
2959 im->text_prop[i].size = text_prop[i].size;
2960 strcpy(im->text_prop[i].font,text_prop[i].font);
2965 rrd_graph_options(int argc, char *argv[],image_desc_t *im)
2968 char *parsetime_error = NULL;
2969 char scan_gtm[12],scan_mtm[12],scan_ltm[12],col_nam[12];
2970 time_t start_tmp=0,end_tmp=0;
2972 struct rrd_time_value start_tv, end_tv;
2974 optind = 0; opterr = 0; /* initialize getopt */
2976 parsetime("end-24h", &start_tv);
2977 parsetime("now", &end_tv);
2980 static struct option long_options[] =
2982 {"start", required_argument, 0, 's'},
2983 {"end", required_argument, 0, 'e'},
2984 {"x-grid", required_argument, 0, 'x'},
2985 {"y-grid", required_argument, 0, 'y'},
2986 {"vertical-label",required_argument,0,'v'},
2987 {"width", required_argument, 0, 'w'},
2988 {"height", required_argument, 0, 'h'},
2989 {"interlaced", no_argument, 0, 'i'},
2990 {"upper-limit",required_argument, 0, 'u'},
2991 {"lower-limit",required_argument, 0, 'l'},
2992 {"rigid", no_argument, 0, 'r'},
2993 {"base", required_argument, 0, 'b'},
2994 {"logarithmic",no_argument, 0, 'o'},
2995 {"color", required_argument, 0, 'c'},
2996 {"font", required_argument, 0, 'n'},
2997 {"title", required_argument, 0, 't'},
2998 {"imginfo", required_argument, 0, 'f'},
2999 {"imgformat", required_argument, 0, 'a'},
3000 {"lazy", no_argument, 0, 'z'},
3001 {"zoom", required_argument, 0, 'm'},
3002 {"no-legend", no_argument, 0, 'g'},
3003 {"force-rules-legend",no_argument,0, 'F'},
3004 {"only-graph", no_argument, 0, 'j'},
3005 {"alt-y-grid", no_argument, 0, 'Y'},
3006 {"no-minor", no_argument, 0, 'I'},
3007 {"slope-mode", no_argument, 0, 'E'},
3008 {"alt-autoscale", no_argument, 0, 'A'},
3009 {"alt-autoscale-max", no_argument, 0, 'M'},
3010 {"no-gridfit", no_argument, 0, 'N'},
3011 {"units-exponent",required_argument, 0, 'X'},
3012 {"units-length",required_argument, 0, 'L'},
3013 {"step", required_argument, 0, 'S'},
3014 {"tabwidth", required_argument, 0, 'T'},
3015 {"font-render-mode", required_argument, 0, 'R'},
3016 {"font-smoothing-threshold", required_argument, 0, 'B'},
3017 {"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 */
3019 int option_index = 0;
3021 int col_start,col_end;
3023 opt = getopt_long(argc, argv,
3024 "s:e:x:y:v:w:h:iu:l:rb:oc:n:m:t:f:a:I:zgjFYAMEX:L:S:T:NR:B:",
3025 long_options, &option_index);
3032 im->extra_flags |= NOMINOR;
3035 im->extra_flags |= ALTYGRID;
3038 im->extra_flags |= ALTAUTOSCALE;
3041 im->extra_flags |= ALTAUTOSCALE_MAX;
3044 im->extra_flags |= ONLY_GRAPH;
3047 im->extra_flags |= NOLEGEND;
3050 im->extra_flags |= FORCE_RULES_LEGEND;
3053 im->unitsexponent = atoi(optarg);
3056 im->unitslength = atoi(optarg);
3059 im->tabwidth = atof(optarg);
3062 im->step = atoi(optarg);
3068 if ((parsetime_error = parsetime(optarg, &start_tv))) {
3069 rrd_set_error( "start time: %s", parsetime_error );
3074 if ((parsetime_error = parsetime(optarg, &end_tv))) {
3075 rrd_set_error( "end time: %s", parsetime_error );
3080 if(strcmp(optarg,"none") == 0){
3086 "%10[A-Z]:%ld:%10[A-Z]:%ld:%10[A-Z]:%ld:%ld:%n",
3088 &im->xlab_user.gridst,
3090 &im->xlab_user.mgridst,
3092 &im->xlab_user.labst,
3093 &im->xlab_user.precis,
3094 &stroff) == 7 && stroff != 0){
3095 strncpy(im->xlab_form, optarg+stroff, sizeof(im->xlab_form) - 1);
3096 im->xlab_form[sizeof(im->xlab_form)-1] = '\0';
3097 if((int)(im->xlab_user.gridtm = tmt_conv(scan_gtm)) == -1){
3098 rrd_set_error("unknown keyword %s",scan_gtm);
3100 } else if ((int)(im->xlab_user.mgridtm = tmt_conv(scan_mtm)) == -1){
3101 rrd_set_error("unknown keyword %s",scan_mtm);
3103 } else if ((int)(im->xlab_user.labtm = tmt_conv(scan_ltm)) == -1){
3104 rrd_set_error("unknown keyword %s",scan_ltm);
3107 im->xlab_user.minsec = 1;
3108 im->xlab_user.stst = im->xlab_form;
3110 rrd_set_error("invalid x-grid format");
3116 if(strcmp(optarg,"none") == 0){
3124 &im->ylabfact) == 2) {
3125 if(im->ygridstep<=0){
3126 rrd_set_error("grid step must be > 0");
3128 } else if (im->ylabfact < 1){
3129 rrd_set_error("label factor must be > 0");
3133 rrd_set_error("invalid y-grid format");
3138 strncpy(im->ylegend,optarg,150);
3139 im->ylegend[150]='\0';
3142 im->maxval = atof(optarg);
3145 im->minval = atof(optarg);
3148 im->base = atol(optarg);
3149 if(im->base != 1024 && im->base != 1000 ){
3150 rrd_set_error("the only sensible value for base apart from 1000 is 1024");
3155 long_tmp = atol(optarg);
3156 if (long_tmp < 10) {
3157 rrd_set_error("width below 10 pixels");
3160 im->xsize = long_tmp;
3163 long_tmp = atol(optarg);
3164 if (long_tmp < 10) {
3165 rrd_set_error("height below 10 pixels");
3168 im->ysize = long_tmp;
3171 im->canvas->interlaced = 1;
3177 im->imginfo = optarg;
3180 if((int)(im->canvas->imgformat = if_conv(optarg)) == -1) {
3181 rrd_set_error("unsupported graphics format '%s'",optarg);
3193 im->logarithmic = 1;
3194 if (isnan(im->minval))
3199 "%10[A-Z]#%n%8lx%n",
3200 col_nam,&col_start,&color,&col_end) == 2){
3202 int col_len = col_end - col_start;
3206 ((color & 0xF00) * 0x110000) |
3207 ((color & 0x0F0) * 0x011000) |
3208 ((color & 0x00F) * 0x001100) |
3214 ((color & 0xF000) * 0x11000) |
3215 ((color & 0x0F00) * 0x01100) |
3216 ((color & 0x00F0) * 0x00110) |
3217 ((color & 0x000F) * 0x00011)
3221 color = (color << 8) + 0xff /* shift left by 8 */;
3226 rrd_set_error("the color format is #RRGGBB[AA]");
3229 if((ci=grc_conv(col_nam)) != -1){
3230 im->graph_col[ci]=color;
3232 rrd_set_error("invalid color name '%s'",col_nam);
3236 rrd_set_error("invalid color def format");
3243 char font[1024] = "";
3246 "%10[A-Z]:%lf:%1000s",
3247 prop,&size,font) >= 2){
3249 if((sindex=text_prop_conv(prop)) != -1){
3250 for (propidx=sindex;propidx<TEXT_PROP_LAST;propidx++){
3252 im->text_prop[propidx].size=size;
3254 if (strlen(font) > 0){
3255 strcpy(im->text_prop[propidx].font,font);
3257 if (propidx==sindex && sindex != 0) break;
3260 rrd_set_error("invalid fonttag '%s'",prop);
3264 rrd_set_error("invalid text property format");
3270 im->canvas->zoom = atof(optarg);
3271 if (im->canvas->zoom <= 0.0) {
3272 rrd_set_error("zoom factor must be > 0");
3277 strncpy(im->title,optarg,150);
3278 im->title[150]='\0';
3282 if ( strcmp( optarg, "normal" ) == 0 )
3283 im->canvas->aa_type = AA_NORMAL;
3284 else if ( strcmp( optarg, "light" ) == 0 )
3285 im->canvas->aa_type = AA_LIGHT;
3286 else if ( strcmp( optarg, "mono" ) == 0 )
3287 im->canvas->aa_type = AA_NONE;
3290 rrd_set_error("unknown font-render-mode '%s'", optarg );
3296 im->canvas->font_aa_threshold = atof(optarg);
3301 rrd_set_error("unknown option '%c'", optopt);
3303 rrd_set_error("unknown option '%s'",argv[optind-1]);
3308 if (optind >= argc) {
3309 rrd_set_error("missing filename");
3313 if (im->logarithmic == 1 && (im->minval <= 0 || isnan(im->minval))){
3314 rrd_set_error("for a logarithmic yaxis you must specify a lower-limit > 0");
3318 if (proc_start_end(&start_tv,&end_tv,&start_tmp,&end_tmp) == -1){
3319 /* error string is set in parsetime.c */
3323 if (start_tmp < 3600*24*365*10){
3324 rrd_set_error("the first entry to fetch should be after 1980 (%ld)",start_tmp);
3328 if (end_tmp < start_tmp) {
3329 rrd_set_error("start (%ld) should be less than end (%ld)",
3330 start_tmp, end_tmp);
3334 im->start = start_tmp;
3336 im->step = max((long)im->step, (im->end-im->start)/im->xsize);
3340 rrd_graph_check_vname(image_desc_t *im, char *varname, char *err)
3342 if ((im->gdes[im->gdes_c-1].vidx=find_var(im,varname))==-1) {
3343 rrd_set_error("Unknown variable '%s' in %s",varname,err);
3349 rrd_graph_color(image_desc_t *im, char *var, char *err, int optional)
3352 graph_desc_t *gdp=&im->gdes[im->gdes_c-1];
3354 color=strstr(var,"#");
3357 rrd_set_error("Found no color in %s",err);
3366 rest=strstr(color,":");
3374 sscanf(color,"#%6lx%n",&col,&n);
3375 col = (col << 8) + 0xff /* shift left by 8 */;
3376 if (n!=7) rrd_set_error("Color problem in %s",err);
3379 sscanf(color,"#%8lx%n",&col,&n);
3382 rrd_set_error("Color problem in %s",err);
3384 if (rrd_test_error()) return 0;
3391 int bad_format(char *fmt) {
3395 while (*ptr != '\0')
3396 if (*ptr++ == '%') {
3398 /* line cannot end with percent char */
3399 if (*ptr == '\0') return 1;
3401 /* '%s', '%S' and '%%' are allowed */
3402 if (*ptr == 's' || *ptr == 'S' || *ptr == '%') ptr++;
3404 /* %c is allowed (but use only with vdef!) */
3405 else if (*ptr == 'c') {
3410 /* or else '% 6.2lf' and such are allowed */
3412 /* optional padding character */
3413 if (*ptr == ' ' || *ptr == '+' || *ptr == '-') ptr++;
3415 /* This should take care of 'm.n' with all three optional */
3416 while (*ptr >= '0' && *ptr <= '9') ptr++;
3417 if (*ptr == '.') ptr++;
3418 while (*ptr >= '0' && *ptr <= '9') ptr++;
3420 /* Either 'le', 'lf' or 'lg' must follow here */
3421 if (*ptr++ != 'l') return 1;
3422 if (*ptr == 'e' || *ptr == 'f' || *ptr == 'g') ptr++;
3433 vdef_parse(gdes,str)
3434 struct graph_desc_t *gdes;
3435 const char *const str;
3437 /* A VDEF currently is either "func" or "param,func"
3438 * so the parsing is rather simple. Change if needed.
3445 sscanf(str,"%le,%29[A-Z]%n",¶m,func,&n);
3446 if (n== (int)strlen(str)) { /* matched */
3450 sscanf(str,"%29[A-Z]%n",func,&n);
3451 if (n== (int)strlen(str)) { /* matched */
3454 rrd_set_error("Unknown function string '%s' in VDEF '%s'"
3461 if (!strcmp("PERCENT",func)) gdes->vf.op = VDEF_PERCENT;
3462 else if (!strcmp("MAXIMUM",func)) gdes->vf.op = VDEF_MAXIMUM;
3463 else if (!strcmp("AVERAGE",func)) gdes->vf.op = VDEF_AVERAGE;
3464 else if (!strcmp("MINIMUM",func)) gdes->vf.op = VDEF_MINIMUM;
3465 else if (!strcmp("TOTAL", func)) gdes->vf.op = VDEF_TOTAL;
3466 else if (!strcmp("FIRST", func)) gdes->vf.op = VDEF_FIRST;
3467 else if (!strcmp("LAST", func)) gdes->vf.op = VDEF_LAST;
3468 else if (!strcmp("LSLSLOPE", func)) gdes->vf.op = VDEF_LSLSLOPE;
3469 else if (!strcmp("LSLINT", func)) gdes->vf.op = VDEF_LSLINT;
3470 else if (!strcmp("LSLCORREL",func)) gdes->vf.op = VDEF_LSLCORREL;
3472 rrd_set_error("Unknown function '%s' in VDEF '%s'\n"
3479 switch (gdes->vf.op) {
3481 if (isnan(param)) { /* no parameter given */
3482 rrd_set_error("Function '%s' needs parameter in VDEF '%s'\n"
3488 if (param>=0.0 && param<=100.0) {
3489 gdes->vf.param = param;
3490 gdes->vf.val = DNAN; /* undefined */
3491 gdes->vf.when = 0; /* undefined */
3493 rrd_set_error("Parameter '%f' out of range in VDEF '%s'\n"
3508 case VDEF_LSLCORREL:
3510 gdes->vf.param = DNAN;
3511 gdes->vf.val = DNAN;
3514 rrd_set_error("Function '%s' needs no parameter in VDEF '%s'\n"
3531 graph_desc_t *src,*dst;
3535 dst = &im->gdes[gdi];
3536 src = &im->gdes[dst->vidx];
3537 data = src->data + src->ds;
3538 steps = (src->end - src->start) / src->step;
3541 printf("DEBUG: start == %lu, end == %lu, %lu steps\n"
3548 switch (dst->vf.op) {
3549 case VDEF_PERCENT: {
3550 rrd_value_t * array;
3554 if ((array = malloc(steps*sizeof(double)))==NULL) {
3555 rrd_set_error("malloc VDEV_PERCENT");
3558 for (step=0;step < steps; step++) {
3559 array[step]=data[step*src->ds_cnt];
3561 qsort(array,step,sizeof(double),vdef_percent_compar);
3563 field = (steps-1)*dst->vf.param/100;
3564 dst->vf.val = array[field];
3565 dst->vf.when = 0; /* no time component */
3568 for(step=0;step<steps;step++)
3569 printf("DEBUG: %3li:%10.2f %c\n",step,array[step],step==field?'*':' ');
3575 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3576 if (step == steps) {
3580 dst->vf.val = data[step*src->ds_cnt];
3581 dst->vf.when = src->start + (step+1)*src->step;
3583 while (step != steps) {
3584 if (finite(data[step*src->ds_cnt])) {
3585 if (data[step*src->ds_cnt] > dst->vf.val) {
3586 dst->vf.val = data[step*src->ds_cnt];
3587 dst->vf.when = src->start + (step+1)*src->step;
3594 case VDEF_AVERAGE: {
3597 for (step=0;step<steps;step++) {
3598 if (finite(data[step*src->ds_cnt])) {
3599 sum += data[step*src->ds_cnt];
3604 if (dst->vf.op == VDEF_TOTAL) {
3605 dst->vf.val = sum*src->step;
3606 dst->vf.when = cnt*src->step; /* not really "when" */
3608 dst->vf.val = sum/cnt;
3609 dst->vf.when = 0; /* no time component */
3619 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3620 if (step == steps) {
3624 dst->vf.val = data[step*src->ds_cnt];
3625 dst->vf.when = src->start + (step+1)*src->step;
3627 while (step != steps) {
3628 if (finite(data[step*src->ds_cnt])) {
3629 if (data[step*src->ds_cnt] < dst->vf.val) {
3630 dst->vf.val = data[step*src->ds_cnt];
3631 dst->vf.when = src->start + (step+1)*src->step;
3638 /* The time value returned here is one step before the
3639 * actual time value. This is the start of the first
3643 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3644 if (step == steps) { /* all entries were NaN */
3648 dst->vf.val = data[step*src->ds_cnt];
3649 dst->vf.when = src->start + step*src->step;
3653 /* The time value returned here is the
3654 * actual time value. This is the end of the last
3658 while (step >= 0 && isnan(data[step*src->ds_cnt])) step--;
3659 if (step < 0) { /* all entries were NaN */
3663 dst->vf.val = data[step*src->ds_cnt];
3664 dst->vf.when = src->start + (step+1)*src->step;
3669 case VDEF_LSLCORREL:{
3670 /* Bestfit line by linear least squares method */
3673 double SUMx, SUMy, SUMxy, SUMxx, SUMyy, slope, y_intercept, correl ;
3674 SUMx = 0; SUMy = 0; SUMxy = 0; SUMxx = 0; SUMyy = 0;
3676 for (step=0;step<steps;step++) {
3677 if (finite(data[step*src->ds_cnt])) {
3680 SUMxx += step * step;
3681 SUMxy += step * data[step*src->ds_cnt];
3682 SUMy += data[step*src->ds_cnt];
3683 SUMyy += data[step*src->ds_cnt]*data[step*src->ds_cnt];
3687 slope = ( SUMx*SUMy - cnt*SUMxy ) / ( SUMx*SUMx - cnt*SUMxx );
3688 y_intercept = ( SUMy - slope*SUMx ) / cnt;
3689 correl = (SUMxy - (SUMx*SUMy)/cnt) / sqrt((SUMxx - (SUMx*SUMx)/cnt)*(SUMyy - (SUMy*SUMy)/cnt));
3692 if (dst->vf.op == VDEF_LSLSLOPE) {
3693 dst->vf.val = slope;
3694 dst->vf.when = cnt*src->step;
3695 } else if (dst->vf.op == VDEF_LSLINT) {
3696 dst->vf.val = y_intercept;
3697 dst->vf.when = cnt*src->step;
3698 } else if (dst->vf.op == VDEF_LSLCORREL) {
3699 dst->vf.val = correl;
3700 dst->vf.when = cnt*src->step;
3713 /* NaN < -INF < finite_values < INF */
3715 vdef_percent_compar(a,b)
3718 /* Equality is not returned; this doesn't hurt except
3719 * (maybe) for a little performance.
3722 /* First catch NaN values. They are smallest */
3723 if (isnan( *(double *)a )) return -1;
3724 if (isnan( *(double *)b )) return 1;
3726 /* NaN doesn't reach this part so INF and -INF are extremes.
3727 * The sign from isinf() is compatible with the sign we return
3729 if (isinf( *(double *)a )) return isinf( *(double *)a );
3730 if (isinf( *(double *)b )) return isinf( *(double *)b );
3732 /* If we reach this, both values must be finite */
3733 if ( *(double *)a < *(double *)b ) return -1; else return 1;