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 (im->gdes[i].gf==GF_STACK)) {
1025 if((im->gdes[i].p_data = malloc((im->xsize +1)
1026 * sizeof(rrd_value_t)))==NULL){
1027 rrd_set_error("malloc data_proc");
1033 for (i=0;i<im->xsize;i++) { /* for each pixel */
1035 gr_time = im->start+pixstep*i; /* time of the current step */
1038 for (ii=0;ii<im->gdes_c;ii++) {
1040 switch (im->gdes[ii].gf) {
1044 if (!im->gdes[ii].stack)
1047 value = im->gdes[ii].yrule;
1048 if (isnan(value) || (im->gdes[ii].gf == GF_TICK)) {
1049 /* The time of the data doesn't necessarily match
1050 ** the time of the graph. Beware.
1052 vidx = im->gdes[ii].vidx;
1053 if (im->gdes[vidx].gf == GF_VDEF) {
1054 value = im->gdes[vidx].vf.val;
1055 } else if (((long int)gr_time >= (long int)im->gdes[vidx].start) &&
1056 ((long int)gr_time <= (long int)im->gdes[vidx].end) ) {
1057 value = im->gdes[vidx].data[
1058 (unsigned long) floor(
1059 (double)(gr_time - im->gdes[vidx].start)
1060 / im->gdes[vidx].step)
1061 * im->gdes[vidx].ds_cnt
1069 if (! isnan(value)) {
1071 im->gdes[ii].p_data[i] = paintval;
1072 /* GF_TICK: the data values are not
1073 ** relevant for min and max
1075 if (finite(paintval) && im->gdes[ii].gf != GF_TICK ) {
1076 if (isnan(minval) || paintval < minval)
1078 if (isnan(maxval) || paintval > maxval)
1082 im->gdes[ii].p_data[i] = DNAN;
1091 /* if min or max have not been asigned a value this is because
1092 there was no data in the graph ... this is not good ...
1093 lets set these to dummy values then ... */
1095 if (isnan(minval)) minval = 0.0;
1096 if (isnan(maxval)) maxval = 1.0;
1098 /* adjust min and max values */
1099 if (isnan(im->minval)
1100 /* don't adjust low-end with log scale */
1101 || ((!im->logarithmic && !im->rigid) && im->minval > minval)
1103 im->minval = minval;
1104 if (isnan(im->maxval)
1105 || (!im->rigid && im->maxval < maxval)
1107 if (im->logarithmic)
1108 im->maxval = maxval * 1.1;
1110 im->maxval = maxval;
1112 /* make sure min is smaller than max */
1113 if (im->minval > im->maxval) {
1114 im->minval = 0.99 * im->maxval;
1117 /* make sure min and max are not equal */
1118 if (im->minval == im->maxval) {
1120 if (! im->logarithmic) {
1123 /* make sure min and max are not both zero */
1124 if (im->maxval == 0.0) {
1133 /* identify the point where the first gridline, label ... gets placed */
1137 time_t start, /* what is the initial time */
1138 enum tmt_en baseint, /* what is the basic interval */
1139 long basestep /* how many if these do we jump a time */
1143 localtime_r(&start, &tm);
1146 tm.tm_sec -= tm.tm_sec % basestep; break;
1149 tm.tm_min -= tm.tm_min % basestep;
1154 tm.tm_hour -= tm.tm_hour % basestep; break;
1156 /* we do NOT look at the basestep for this ... */
1159 tm.tm_hour = 0; break;
1161 /* we do NOT look at the basestep for this ... */
1165 tm.tm_mday -= tm.tm_wday -1; /* -1 because we want the monday */
1166 if (tm.tm_wday==0) tm.tm_mday -= 7; /* we want the *previous* monday */
1173 tm.tm_mon -= tm.tm_mon % basestep; break;
1181 tm.tm_year -= (tm.tm_year+1900) % basestep;
1186 /* identify the point where the next gridline, label ... gets placed */
1189 time_t current, /* what is the initial time */
1190 enum tmt_en baseint, /* what is the basic interval */
1191 long basestep /* how many if these do we jump a time */
1196 localtime_r(¤t, &tm);
1200 tm.tm_sec += basestep; break;
1202 tm.tm_min += basestep; break;
1204 tm.tm_hour += basestep; break;
1206 tm.tm_mday += basestep; break;
1208 tm.tm_mday += 7*basestep; break;
1210 tm.tm_mon += basestep; break;
1212 tm.tm_year += basestep;
1214 madetime = mktime(&tm);
1215 } while (madetime == -1); /* this is necessary to skip impssible times
1216 like the daylight saving time skips */
1222 /* calculate values required for PRINT and GPRINT functions */
1225 print_calc(image_desc_t *im, char ***prdata)
1227 long i,ii,validsteps;
1230 int graphelement = 0;
1233 double magfact = -1;
1237 if (im->imginfo) prlines++;
1238 for(i=0;i<im->gdes_c;i++){
1239 switch(im->gdes[i].gf){
1242 if(((*prdata) = rrd_realloc((*prdata),prlines*sizeof(char *)))==NULL){
1243 rrd_set_error("realloc prdata");
1247 /* PRINT and GPRINT can now print VDEF generated values.
1248 * There's no need to do any calculations on them as these
1249 * calculations were already made.
1251 vidx = im->gdes[i].vidx;
1252 if (im->gdes[vidx].gf==GF_VDEF) { /* simply use vals */
1253 printval = im->gdes[vidx].vf.val;
1254 printtime = im->gdes[vidx].vf.when;
1255 } else { /* need to calculate max,min,avg etcetera */
1256 max_ii =((im->gdes[vidx].end
1257 - im->gdes[vidx].start)
1258 / im->gdes[vidx].step
1259 * im->gdes[vidx].ds_cnt);
1262 for( ii=im->gdes[vidx].ds;
1264 ii+=im->gdes[vidx].ds_cnt){
1265 if (! finite(im->gdes[vidx].data[ii]))
1267 if (isnan(printval)){
1268 printval = im->gdes[vidx].data[ii];
1273 switch (im->gdes[i].cf){
1276 case CF_DEVSEASONAL:
1280 printval += im->gdes[vidx].data[ii];
1283 printval = min( printval, im->gdes[vidx].data[ii]);
1287 printval = max( printval, im->gdes[vidx].data[ii]);
1290 printval = im->gdes[vidx].data[ii];
1293 if (im->gdes[i].cf==CF_AVERAGE || im->gdes[i].cf > CF_LAST) {
1294 if (validsteps > 1) {
1295 printval = (printval / validsteps);
1298 } /* prepare printval */
1300 if (!strcmp(im->gdes[i].format,"%c")) { /* VDEF time print */
1301 char ctime_buf[128]; /* PS: for ctime_r, must be >= 26 chars */
1303 ctime_r(&printtime,ctime_buf);
1304 while(isprint(ctime_buf[iii])){iii++;}
1305 ctime_buf[iii]='\0';
1306 if (im->gdes[i].gf == GF_PRINT){
1307 (*prdata)[prlines-2] = malloc((FMT_LEG_LEN+2)*sizeof(char));
1308 sprintf((*prdata)[prlines-2],"%s (%lu)",ctime_buf,printtime);
1309 (*prdata)[prlines-1] = NULL;
1311 sprintf(im->gdes[i].legend,"%s (%lu)",ctime_buf,printtime);
1315 if ((percent_s = strstr(im->gdes[i].format,"%S")) != NULL) {
1316 /* Magfact is set to -1 upon entry to print_calc. If it
1317 * is still less than 0, then we need to run auto_scale.
1318 * Otherwise, put the value into the correct units. If
1319 * the value is 0, then do not set the symbol or magnification
1320 * so next the calculation will be performed again. */
1321 if (magfact < 0.0) {
1322 auto_scale(im,&printval,&si_symb,&magfact);
1323 if (printval == 0.0)
1326 printval /= magfact;
1328 *(++percent_s) = 's';
1329 } else if (strstr(im->gdes[i].format,"%s") != NULL) {
1330 auto_scale(im,&printval,&si_symb,&magfact);
1333 if (im->gdes[i].gf == GF_PRINT){
1334 (*prdata)[prlines-2] = malloc((FMT_LEG_LEN+2)*sizeof(char));
1335 (*prdata)[prlines-1] = NULL;
1336 if (bad_format(im->gdes[i].format)) {
1337 rrd_set_error("bad format for PRINT in '%s'", im->gdes[i].format);
1340 #ifdef HAVE_SNPRINTF
1341 snprintf((*prdata)[prlines-2],FMT_LEG_LEN,im->gdes[i].format,printval,si_symb);
1343 sprintf((*prdata)[prlines-2],im->gdes[i].format,printval,si_symb);
1348 if (bad_format(im->gdes[i].format)) {
1349 rrd_set_error("bad format for GPRINT in '%s'", im->gdes[i].format);
1352 #ifdef HAVE_SNPRINTF
1353 snprintf(im->gdes[i].legend,FMT_LEG_LEN-2,im->gdes[i].format,printval,si_symb);
1355 sprintf(im->gdes[i].legend,im->gdes[i].format,printval,si_symb);
1373 #ifdef WITH_PIECHART
1381 return graphelement;
1385 /* place legends with color spots */
1387 leg_place(image_desc_t *im)
1390 int interleg = im->text_prop[TEXT_PROP_LEGEND].size*2.0;
1391 int border = im->text_prop[TEXT_PROP_LEGEND].size*2.0;
1392 int fill=0, fill_last;
1394 int leg_x = border, leg_y = im->yimg;
1398 char prt_fctn; /*special printfunctions */
1401 if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
1402 if ((legspace = malloc(im->gdes_c*sizeof(int)))==NULL){
1403 rrd_set_error("malloc for legspace");
1407 for(i=0;i<im->gdes_c;i++){
1410 /* hid legends for rules which are not displayed */
1412 if(!(im->extra_flags & FORCE_RULES_LEGEND)) {
1413 if (im->gdes[i].gf == GF_HRULE &&
1414 (im->gdes[i].yrule < im->minval || im->gdes[i].yrule > im->maxval))
1415 im->gdes[i].legend[0] = '\0';
1417 if (im->gdes[i].gf == GF_VRULE &&
1418 (im->gdes[i].xrule < im->start || im->gdes[i].xrule > im->end))
1419 im->gdes[i].legend[0] = '\0';
1422 leg_cc = strlen(im->gdes[i].legend);
1424 /* is there a controle code ant the end of the legend string ? */
1425 /* and it is not a tab \\t */
1426 if (leg_cc >= 2 && im->gdes[i].legend[leg_cc-2] == '\\' && im->gdes[i].legend[leg_cc-1] != 't') {
1427 prt_fctn = im->gdes[i].legend[leg_cc-1];
1429 im->gdes[i].legend[leg_cc] = '\0';
1433 /* remove exess space */
1434 while (prt_fctn=='g' &&
1436 im->gdes[i].legend[leg_cc-1]==' '){
1438 im->gdes[i].legend[leg_cc]='\0';
1441 legspace[i]=(prt_fctn=='g' ? 0 : interleg);
1444 /* no interleg space if string ends in \g */
1445 fill += legspace[i];
1447 fill += gfx_get_text_width(im->canvas, fill+border,
1448 im->text_prop[TEXT_PROP_LEGEND].font,
1449 im->text_prop[TEXT_PROP_LEGEND].size,
1451 im->gdes[i].legend, 0);
1456 /* who said there was a special tag ... ?*/
1457 if (prt_fctn=='g') {
1460 if (prt_fctn == '\0') {
1461 if (i == im->gdes_c -1 ) prt_fctn ='l';
1463 /* is it time to place the legends ? */
1464 if (fill > im->ximg - 2*border){
1479 if (prt_fctn != '\0'){
1481 if (leg_c >= 2 && prt_fctn == 'j') {
1482 glue = (im->ximg - fill - 2* border) / (leg_c-1);
1486 if (prt_fctn =='c') leg_x = (im->ximg - fill) / 2.0;
1487 if (prt_fctn =='r') leg_x = im->ximg - fill - border;
1489 for(ii=mark;ii<=i;ii++){
1490 if(im->gdes[ii].legend[0]=='\0')
1491 continue; /* skip empty legends */
1492 im->gdes[ii].leg_x = leg_x;
1493 im->gdes[ii].leg_y = leg_y;
1495 gfx_get_text_width(im->canvas, leg_x,
1496 im->text_prop[TEXT_PROP_LEGEND].font,
1497 im->text_prop[TEXT_PROP_LEGEND].size,
1499 im->gdes[ii].legend, 0)
1503 leg_y += im->text_prop[TEXT_PROP_LEGEND].size*1.8;
1504 if (prt_fctn == 's') leg_y -= im->text_prop[TEXT_PROP_LEGEND].size;
1516 /* create a grid on the graph. it determines what to do
1517 from the values of xsize, start and end */
1519 /* the xaxis labels are determined from the number of seconds per pixel
1520 in the requested graph */
1525 calc_horizontal_grid(image_desc_t *im)
1531 int decimals, fractionals;
1533 im->ygrid_scale.labfact=2;
1534 range = im->maxval - im->minval;
1535 scaledrange = range / im->magfact;
1537 /* does the scale of this graph make it impossible to put lines
1538 on it? If so, give up. */
1539 if (isnan(scaledrange)) {
1543 /* find grid spaceing */
1545 if(isnan(im->ygridstep)){
1546 if(im->extra_flags & ALTYGRID) {
1547 /* find the value with max number of digits. Get number of digits */
1548 decimals = ceil(log10(max(fabs(im->maxval), fabs(im->minval))*im->viewfactor/im->magfact));
1549 if(decimals <= 0) /* everything is small. make place for zero */
1552 im->ygrid_scale.gridstep = pow((double)10, floor(log10(range*im->viewfactor/im->magfact)))/im->viewfactor*im->magfact;
1554 if(im->ygrid_scale.gridstep == 0) /* range is one -> 0.1 is reasonable scale */
1555 im->ygrid_scale.gridstep = 0.1;
1556 /* should have at least 5 lines but no more then 15 */
1557 if(range/im->ygrid_scale.gridstep < 5)
1558 im->ygrid_scale.gridstep /= 10;
1559 if(range/im->ygrid_scale.gridstep > 15)
1560 im->ygrid_scale.gridstep *= 10;
1561 if(range/im->ygrid_scale.gridstep > 5) {
1562 im->ygrid_scale.labfact = 1;
1563 if(range/im->ygrid_scale.gridstep > 8)
1564 im->ygrid_scale.labfact = 2;
1567 im->ygrid_scale.gridstep /= 5;
1568 im->ygrid_scale.labfact = 5;
1570 fractionals = floor(log10(im->ygrid_scale.gridstep*(double)im->ygrid_scale.labfact*im->viewfactor/im->magfact));
1571 if(fractionals < 0) { /* small amplitude. */
1572 int len = decimals - fractionals + 1;
1573 if (im->unitslength < len+2) im->unitslength = len+2;
1574 sprintf(im->ygrid_scale.labfmt, "%%%d.%df%s", len, -fractionals,(im->symbol != ' ' ? " %c" : ""));
1576 int len = decimals + 1;
1577 if (im->unitslength < len+2) im->unitslength = len+2;
1578 sprintf(im->ygrid_scale.labfmt, "%%%d.0f%s", len, ( im->symbol != ' ' ? " %c" : "" ));
1582 for(i=0;ylab[i].grid > 0;i++){
1583 pixel = im->ysize / (scaledrange / ylab[i].grid);
1590 if (pixel * ylab[gridind].lfac[i] >= 2.5 * im->text_prop[TEXT_PROP_AXIS].size) {
1591 im->ygrid_scale.labfact = ylab[gridind].lfac[i];
1596 im->ygrid_scale.gridstep = ylab[gridind].grid * im->magfact;
1599 im->ygrid_scale.gridstep = im->ygridstep;
1600 im->ygrid_scale.labfact = im->ylabfact;
1605 int draw_horizontal_grid(image_desc_t *im)
1609 char graph_label[100];
1610 double X0=im->xorigin;
1611 double X1=im->xorigin+im->xsize;
1613 int sgrid = (int)( im->minval / im->ygrid_scale.gridstep - 1);
1614 int egrid = (int)( im->maxval / im->ygrid_scale.gridstep + 1);
1616 scaledstep = im->ygrid_scale.gridstep/(double)im->magfact*(double)im->viewfactor;
1617 MaxY = scaledstep*(double)egrid;
1618 for (i = sgrid; i <= egrid; i++){
1619 double Y0=ytr(im,im->ygrid_scale.gridstep*i);
1620 if ( Y0 >= im->yorigin-im->ysize
1621 && Y0 <= im->yorigin){
1622 if(i % im->ygrid_scale.labfact == 0){
1623 if (im->symbol == ' ') {
1624 if(im->extra_flags & ALTYGRID) {
1625 sprintf(graph_label,im->ygrid_scale.labfmt,scaledstep*(double)i);
1628 sprintf(graph_label,"%4.1f",scaledstep*(double)i);
1630 sprintf(graph_label,"%4.0f",scaledstep*(double)i);
1634 char sisym = ( i == 0 ? ' ' : im->symbol);
1635 if(im->extra_flags & ALTYGRID) {
1636 sprintf(graph_label,im->ygrid_scale.labfmt,scaledstep*(double)i,sisym);
1639 sprintf(graph_label,"%4.1f %c",scaledstep*(double)i, sisym);
1641 sprintf(graph_label,"%4.0f %c",scaledstep*(double)i, sisym);
1646 gfx_new_text ( im->canvas,
1647 X0-im->text_prop[TEXT_PROP_AXIS].size, Y0,
1648 im->graph_col[GRC_FONT],
1649 im->text_prop[TEXT_PROP_AXIS].font,
1650 im->text_prop[TEXT_PROP_AXIS].size,
1651 im->tabwidth, 0.0, GFX_H_RIGHT, GFX_V_CENTER,
1653 gfx_new_dashed_line ( im->canvas,
1656 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1657 im->grid_dash_on, im->grid_dash_off);
1659 } else if (!(im->extra_flags & NOMINOR)) {
1660 gfx_new_dashed_line ( im->canvas,
1663 GRIDWIDTH, im->graph_col[GRC_GRID],
1664 im->grid_dash_on, im->grid_dash_off);
1672 /* logaritmic horizontal grid */
1674 horizontal_log_grid(image_desc_t *im)
1678 int minoridx=0, majoridx=0;
1679 char graph_label[100];
1681 double value, pixperstep, minstep;
1683 /* find grid spaceing */
1684 pixpex= (double)im->ysize / (log10(im->maxval) - log10(im->minval));
1686 if (isnan(pixpex)) {
1690 for(i=0;yloglab[i][0] > 0;i++){
1691 minstep = log10(yloglab[i][0]);
1692 for(ii=1;yloglab[i][ii+1] > 0;ii++){
1693 if(yloglab[i][ii+2]==0){
1694 minstep = log10(yloglab[i][ii+1])-log10(yloglab[i][ii]);
1698 pixperstep = pixpex * minstep;
1699 if(pixperstep > 5){minoridx = i;}
1700 if(pixperstep > 2 * im->text_prop[TEXT_PROP_LEGEND].size){majoridx = i;}
1704 X1=im->xorigin+im->xsize;
1705 /* paint minor grid */
1706 for (value = pow((double)10, log10(im->minval)
1707 - fmod(log10(im->minval),log10(yloglab[minoridx][0])));
1708 value <= im->maxval;
1709 value *= yloglab[minoridx][0]){
1710 if (value < im->minval) continue;
1712 while(yloglab[minoridx][++i] > 0){
1713 Y0 = ytr(im,value * yloglab[minoridx][i]);
1714 if (Y0 <= im->yorigin - im->ysize) break;
1715 gfx_new_dashed_line ( im->canvas,
1718 GRIDWIDTH, im->graph_col[GRC_GRID],
1719 im->grid_dash_on, im->grid_dash_off);
1723 /* paint major grid and labels*/
1724 for (value = pow((double)10, log10(im->minval)
1725 - fmod(log10(im->minval),log10(yloglab[majoridx][0])));
1726 value <= im->maxval;
1727 value *= yloglab[majoridx][0]){
1728 if (value < im->minval) continue;
1730 while(yloglab[majoridx][++i] > 0){
1731 Y0 = ytr(im,value * yloglab[majoridx][i]);
1732 if (Y0 <= im->yorigin - im->ysize) break;
1733 gfx_new_dashed_line ( im->canvas,
1736 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1737 im->grid_dash_on, im->grid_dash_off);
1739 sprintf(graph_label,"%3.0e",value * yloglab[majoridx][i]);
1740 gfx_new_text ( im->canvas,
1741 X0-im->text_prop[TEXT_PROP_AXIS].size, Y0,
1742 im->graph_col[GRC_FONT],
1743 im->text_prop[TEXT_PROP_AXIS].font,
1744 im->text_prop[TEXT_PROP_AXIS].size,
1745 im->tabwidth,0.0, GFX_H_RIGHT, GFX_V_CENTER,
1757 int xlab_sel; /* which sort of label and grid ? */
1758 time_t ti, tilab, timajor;
1760 char graph_label[100];
1761 double X0,Y0,Y1; /* points for filled graph and more*/
1764 /* the type of time grid is determined by finding
1765 the number of seconds per pixel in the graph */
1768 if(im->xlab_user.minsec == -1){
1769 factor=(im->end - im->start)/im->xsize;
1771 while ( xlab[xlab_sel+1].minsec != -1
1772 && xlab[xlab_sel+1].minsec <= factor) { xlab_sel++; } /* pick the last one */
1773 while ( xlab[xlab_sel-1].minsec == xlab[xlab_sel].minsec
1774 && xlab[xlab_sel].length > (im->end - im->start)) { xlab_sel--; } /* go back to the smallest size */
1775 im->xlab_user.gridtm = xlab[xlab_sel].gridtm;
1776 im->xlab_user.gridst = xlab[xlab_sel].gridst;
1777 im->xlab_user.mgridtm = xlab[xlab_sel].mgridtm;
1778 im->xlab_user.mgridst = xlab[xlab_sel].mgridst;
1779 im->xlab_user.labtm = xlab[xlab_sel].labtm;
1780 im->xlab_user.labst = xlab[xlab_sel].labst;
1781 im->xlab_user.precis = xlab[xlab_sel].precis;
1782 im->xlab_user.stst = xlab[xlab_sel].stst;
1785 /* y coords are the same for every line ... */
1787 Y1 = im->yorigin-im->ysize;
1790 /* paint the minor grid */
1791 if (!(im->extra_flags & NOMINOR))
1793 for(ti = find_first_time(im->start,
1794 im->xlab_user.gridtm,
1795 im->xlab_user.gridst),
1796 timajor = find_first_time(im->start,
1797 im->xlab_user.mgridtm,
1798 im->xlab_user.mgridst);
1800 ti = find_next_time(ti,im->xlab_user.gridtm,im->xlab_user.gridst)
1802 /* are we inside the graph ? */
1803 if (ti < im->start || ti > im->end) continue;
1804 while (timajor < ti) {
1805 timajor = find_next_time(timajor,
1806 im->xlab_user.mgridtm, im->xlab_user.mgridst);
1808 if (ti == timajor) continue; /* skip as falls on major grid line */
1810 gfx_new_dashed_line(im->canvas,X0,Y0+1, X0,Y1-1,GRIDWIDTH,
1811 im->graph_col[GRC_GRID],
1812 im->grid_dash_on, im->grid_dash_off);
1817 /* paint the major grid */
1818 for(ti = find_first_time(im->start,
1819 im->xlab_user.mgridtm,
1820 im->xlab_user.mgridst);
1822 ti = find_next_time(ti,im->xlab_user.mgridtm,im->xlab_user.mgridst)
1824 /* are we inside the graph ? */
1825 if (ti < im->start || ti > im->end) continue;
1827 gfx_new_dashed_line(im->canvas,X0,Y0+3, X0,Y1-2,MGRIDWIDTH,
1828 im->graph_col[GRC_MGRID],
1829 im->grid_dash_on, im->grid_dash_off);
1832 /* paint the labels below the graph */
1833 for(ti = find_first_time(im->start - im->xlab_user.precis/2,
1834 im->xlab_user.labtm,
1835 im->xlab_user.labst);
1836 ti <= im->end - im->xlab_user.precis/2;
1837 ti = find_next_time(ti,im->xlab_user.labtm,im->xlab_user.labst)
1839 tilab= ti + im->xlab_user.precis/2; /* correct time for the label */
1840 /* are we inside the graph ? */
1841 if (tilab < im->start || tilab > im->end) continue;
1844 localtime_r(&tilab, &tm);
1845 strftime(graph_label,99,im->xlab_user.stst, &tm);
1847 # error "your libc has no strftime I guess we'll abort the exercise here."
1849 gfx_new_text ( im->canvas,
1850 xtr(im,tilab), Y0+im->text_prop[TEXT_PROP_AXIS].size*1.4+5,
1851 im->graph_col[GRC_FONT],
1852 im->text_prop[TEXT_PROP_AXIS].font,
1853 im->text_prop[TEXT_PROP_AXIS].size,
1854 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_BOTTOM,
1867 /* draw x and y axis */
1868 /* gfx_new_line ( im->canvas, im->xorigin+im->xsize,im->yorigin,
1869 im->xorigin+im->xsize,im->yorigin-im->ysize,
1870 GRIDWIDTH, im->graph_col[GRC_AXIS]);
1872 gfx_new_line ( im->canvas, im->xorigin,im->yorigin-im->ysize,
1873 im->xorigin+im->xsize,im->yorigin-im->ysize,
1874 GRIDWIDTH, im->graph_col[GRC_AXIS]); */
1876 gfx_new_line ( im->canvas, im->xorigin-4,im->yorigin,
1877 im->xorigin+im->xsize+4,im->yorigin,
1878 MGRIDWIDTH, im->graph_col[GRC_AXIS]);
1880 gfx_new_line ( im->canvas, im->xorigin,im->yorigin+4,
1881 im->xorigin,im->yorigin-im->ysize-4,
1882 MGRIDWIDTH, im->graph_col[GRC_AXIS]);
1885 /* arrow for X and Y axis direction */
1886 gfx_new_area ( im->canvas,
1887 im->xorigin+im->xsize+2, im->yorigin-2,
1888 im->xorigin+im->xsize+2, im->yorigin+3,
1889 im->xorigin+im->xsize+7, im->yorigin+0.5, /* LINEOFFSET */
1890 im->graph_col[GRC_ARROW]);
1892 gfx_new_area ( im->canvas,
1893 im->xorigin-2, im->yorigin-im->ysize-2,
1894 im->xorigin+3, im->yorigin-im->ysize-2,
1895 im->xorigin+0.5, im->yorigin-im->ysize-7, /* LINEOFFSET */
1896 im->graph_col[GRC_ARROW]);
1901 grid_paint(image_desc_t *im)
1905 double X0,Y0; /* points for filled graph and more*/
1908 /* draw 3d border */
1909 node = gfx_new_area (im->canvas, 0,im->yimg,
1911 2,2,im->graph_col[GRC_SHADEA]);
1912 gfx_add_point( node , im->ximg - 2, 2 );
1913 gfx_add_point( node , im->ximg, 0 );
1914 gfx_add_point( node , 0,0 );
1915 /* gfx_add_point( node , 0,im->yimg ); */
1917 node = gfx_new_area (im->canvas, 2,im->yimg-2,
1918 im->ximg-2,im->yimg-2,
1920 im->graph_col[GRC_SHADEB]);
1921 gfx_add_point( node , im->ximg,0);
1922 gfx_add_point( node , im->ximg,im->yimg);
1923 gfx_add_point( node , 0,im->yimg);
1924 /* gfx_add_point( node , 0,im->yimg ); */
1927 if (im->draw_x_grid == 1 )
1930 if (im->draw_y_grid == 1){
1931 if(im->logarithmic){
1932 res = horizontal_log_grid(im);
1934 res = draw_horizontal_grid(im);
1937 /* dont draw horizontal grid if there is no min and max val */
1939 char *nodata = "No Data found";
1940 gfx_new_text(im->canvas,im->ximg/2, (2*im->yorigin-im->ysize) / 2,
1941 im->graph_col[GRC_FONT],
1942 im->text_prop[TEXT_PROP_AXIS].font,
1943 im->text_prop[TEXT_PROP_AXIS].size,
1944 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_CENTER,
1949 /* yaxis unit description */
1950 gfx_new_text( im->canvas,
1951 10, (im->yorigin - im->ysize/2),
1952 im->graph_col[GRC_FONT],
1953 im->text_prop[TEXT_PROP_UNIT].font,
1954 im->text_prop[TEXT_PROP_UNIT].size, im->tabwidth,
1955 RRDGRAPH_YLEGEND_ANGLE,
1956 GFX_H_LEFT, GFX_V_CENTER,
1960 gfx_new_text( im->canvas,
1961 im->ximg/2, im->text_prop[TEXT_PROP_TITLE].size*1.3+4,
1962 im->graph_col[GRC_FONT],
1963 im->text_prop[TEXT_PROP_TITLE].font,
1964 im->text_prop[TEXT_PROP_TITLE].size, im->tabwidth, 0.0,
1965 GFX_H_CENTER, GFX_V_CENTER,
1967 /* rrdtool 'logo' */
1968 gfx_new_text( im->canvas,
1970 ( im->graph_col[GRC_FONT] & 0xffffff00 ) | 0x00000044,
1971 im->text_prop[TEXT_PROP_AXIS].font,
1972 5.5, im->tabwidth, 270,
1973 GFX_H_RIGHT, GFX_V_TOP,
1974 "RRDTOOL / TOBI OETIKER");
1977 if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
1978 for(i=0;i<im->gdes_c;i++){
1979 if(im->gdes[i].legend[0] =='\0')
1982 /* im->gdes[i].leg_y is the bottom of the legend */
1983 X0 = im->gdes[i].leg_x;
1984 Y0 = im->gdes[i].leg_y;
1985 gfx_new_text ( im->canvas, X0, Y0,
1986 im->graph_col[GRC_FONT],
1987 im->text_prop[TEXT_PROP_LEGEND].font,
1988 im->text_prop[TEXT_PROP_LEGEND].size,
1989 im->tabwidth,0.0, GFX_H_LEFT, GFX_V_BOTTOM,
1990 im->gdes[i].legend );
1991 /* The legend for GRAPH items starts with "M " to have
1992 enough space for the box */
1993 if ( im->gdes[i].gf != GF_PRINT &&
1994 im->gdes[i].gf != GF_GPRINT &&
1995 im->gdes[i].gf != GF_COMMENT) {
1998 boxH = gfx_get_text_width(im->canvas, 0,
1999 im->text_prop[TEXT_PROP_LEGEND].font,
2000 im->text_prop[TEXT_PROP_LEGEND].size,
2001 im->tabwidth,"o", 0) * 1.2;
2004 /* make sure transparent colors show up the same way as in the graph */
2005 node = gfx_new_area(im->canvas,
2009 im->graph_col[GRC_BACK]);
2010 gfx_add_point ( node, X0+boxH, Y0-boxV );
2012 node = gfx_new_area(im->canvas,
2017 gfx_add_point ( node, X0+boxH, Y0-boxV );
2018 node = gfx_new_line(im->canvas,
2021 1.0,im->graph_col[GRC_FRAME]);
2022 gfx_add_point(node,X0+boxH,Y0);
2023 gfx_add_point(node,X0+boxH,Y0-boxV);
2024 gfx_close_path(node);
2031 /*****************************************************
2032 * lazy check make sure we rely need to create this graph
2033 *****************************************************/
2035 int lazy_check(image_desc_t *im){
2038 struct stat imgstat;
2040 if (im->lazy == 0) return 0; /* no lazy option */
2041 if (stat(im->graphfile,&imgstat) != 0)
2042 return 0; /* can't stat */
2043 /* one pixel in the existing graph is more then what we would
2045 if (time(NULL) - imgstat.st_mtime >
2046 (im->end - im->start) / im->xsize)
2048 if ((fd = fopen(im->graphfile,"rb")) == NULL)
2049 return 0; /* the file does not exist */
2050 switch (im->canvas->imgformat) {
2052 size = PngSize(fd,&(im->ximg),&(im->yimg));
2061 #ifdef WITH_PIECHART
2063 pie_part(image_desc_t *im, gfx_color_t color,
2064 double PieCenterX, double PieCenterY, double Radius,
2065 double startangle, double endangle)
2069 double step=M_PI/50; /* Number of iterations for the circle;
2070 ** 10 is definitely too low, more than
2071 ** 50 seems to be overkill
2074 /* Strange but true: we have to work clockwise or else
2075 ** anti aliasing nor transparency don't work.
2077 ** This test is here to make sure we do it right, also
2078 ** this makes the for...next loop more easy to implement.
2079 ** The return will occur if the user enters a negative number
2080 ** (which shouldn't be done according to the specs) or if the
2081 ** programmers do something wrong (which, as we all know, never
2082 ** happens anyway :)
2084 if (endangle<startangle) return;
2086 /* Hidden feature: Radius decreases each full circle */
2088 while (angle>=2*M_PI) {
2093 node=gfx_new_area(im->canvas,
2094 PieCenterX+sin(startangle)*Radius,
2095 PieCenterY-cos(startangle)*Radius,
2098 PieCenterX+sin(endangle)*Radius,
2099 PieCenterY-cos(endangle)*Radius,
2101 for (angle=endangle;angle-startangle>=step;angle-=step) {
2103 PieCenterX+sin(angle)*Radius,
2104 PieCenterY-cos(angle)*Radius );
2111 graph_size_location(image_desc_t *im, int elements
2113 #ifdef WITH_PIECHART
2119 /* The actual size of the image to draw is determined from
2120 ** several sources. The size given on the command line is
2121 ** the graph area but we need more as we have to draw labels
2122 ** and other things outside the graph area
2125 /* +-+-------------------------------------------+
2126 ** |l|.................title.....................|
2127 ** |e+--+-------------------------------+--------+
2130 ** |l| l| main graph area | chart |
2133 ** |r+--+-------------------------------+--------+
2134 ** |e| | x-axis labels | |
2135 ** |v+--+-------------------------------+--------+
2136 ** | |..............legends......................|
2137 ** +-+-------------------------------------------+
2143 #ifdef WITH_PIECHART
2148 Xlegend =0, Ylegend =0,
2150 Xspacing =15, Yspacing =15;
2152 if (im->extra_flags & ONLY_GRAPH) {
2154 im->ximg = im->xsize;
2155 im->yimg = im->ysize;
2156 im->yorigin = im->ysize;
2161 if (im->ylegend[0] != '\0' ) {
2162 Xvertical = im->text_prop[TEXT_PROP_UNIT].size *2;
2166 if (im->title[0] != '\0') {
2167 /* The title is placed "inbetween" two text lines so it
2168 ** automatically has some vertical spacing. The horizontal
2169 ** spacing is added here, on each side.
2171 /* don't care for the with of the title
2172 Xtitle = gfx_get_text_width(im->canvas, 0,
2173 im->text_prop[TEXT_PROP_TITLE].font,
2174 im->text_prop[TEXT_PROP_TITLE].size,
2176 im->title, 0) + 2*Xspacing; */
2177 Ytitle = im->text_prop[TEXT_PROP_TITLE].size*2.6+10;
2183 if (im->draw_x_grid) {
2184 Yxlabel=im->text_prop[TEXT_PROP_AXIS].size *2.5;
2186 if (im->draw_y_grid) {
2187 Xylabel=gfx_get_text_width(im->canvas, 0,
2188 im->text_prop[TEXT_PROP_AXIS].font,
2189 im->text_prop[TEXT_PROP_AXIS].size,
2191 "0", 0) * im->unitslength;
2195 #ifdef WITH_PIECHART
2197 im->piesize=im->xsize<im->ysize?im->xsize:im->ysize;
2203 /* Now calculate the total size. Insert some spacing where
2204 desired. im->xorigin and im->yorigin need to correspond
2205 with the lower left corner of the main graph area or, if
2206 this one is not set, the imaginary box surrounding the
2209 /* The legend width cannot yet be determined, as a result we
2210 ** have problems adjusting the image to it. For now, we just
2211 ** forget about it at all; the legend will have to fit in the
2212 ** size already allocated.
2214 im->ximg = Xylabel + Xmain + 2 * Xspacing;
2216 #ifdef WITH_PIECHART
2220 if (Xmain) im->ximg += Xspacing;
2221 #ifdef WITH_PIECHART
2222 if (Xpie) im->ximg += Xspacing;
2225 im->xorigin = Xspacing + Xylabel;
2227 /* the length of the title should not influence with width of the graph
2228 if (Xtitle > im->ximg) im->ximg = Xtitle; */
2230 if (Xvertical) { /* unit description */
2231 im->ximg += Xvertical;
2232 im->xorigin += Xvertical;
2236 /* The vertical size is interesting... we need to compare
2237 ** the sum of {Ytitle, Ymain, Yxlabel, Ylegend} with Yvertical
2238 ** however we need to know {Ytitle+Ymain+Yxlabel} in order to
2239 ** start even thinking about Ylegend.
2241 ** Do it in three portions: First calculate the inner part,
2242 ** then do the legend, then adjust the total height of the img.
2245 /* reserve space for main and/or pie */
2247 im->yimg = Ymain + Yxlabel;
2249 #ifdef WITH_PIECHART
2250 if (im->yimg < Ypie) im->yimg = Ypie;
2253 im->yorigin = im->yimg - Yxlabel;
2255 /* reserve space for the title *or* some padding above the graph */
2258 im->yorigin += Ytitle;
2260 im->yimg += 1.5*Yspacing;
2261 im->yorigin += 1.5*Yspacing;
2263 /* reserve space for padding below the graph */
2264 im->yimg += Yspacing;
2266 /* Determine where to place the legends onto the image.
2267 ** Adjust im->yimg to match the space requirements.
2269 if(leg_place(im)==-1)
2274 if (Xlegend > im->ximg) {
2276 /* reposition Pie */
2280 #ifdef WITH_PIECHART
2281 /* The pie is placed in the upper right hand corner,
2282 ** just below the title (if any) and with sufficient
2286 im->pie_x = im->ximg - Xspacing - Xpie/2;
2287 im->pie_y = im->yorigin-Ymain+Ypie/2;
2289 im->pie_x = im->ximg/2;
2290 im->pie_y = im->yorigin-Ypie/2;
2298 /* from http://www.cygnus-software.com/papers/comparingfloats/comparingfloats.htm */
2299 /* yes we are loosing precision by doing tos with floats instead of doubles
2300 but it seems more stable this way. */
2302 static int AlmostEqual2sComplement (float A, float B, int maxUlps)
2305 int aInt = *(int*)&A;
2306 int bInt = *(int*)&B;
2308 /* Make sure maxUlps is non-negative and small enough that the
2309 default NAN won't compare as equal to anything. */
2311 /* assert(maxUlps > 0 && maxUlps < 4 * 1024 * 1024); */
2313 /* Make aInt lexicographically ordered as a twos-complement int */
2316 aInt = 0x80000000l - aInt;
2318 /* Make bInt lexicographically ordered as a twos-complement int */
2321 bInt = 0x80000000l - bInt;
2323 intDiff = abs(aInt - bInt);
2325 if (intDiff <= maxUlps)
2331 /* draw that picture thing ... */
2333 graph_paint(image_desc_t *im, char ***calcpr)
2336 int lazy = lazy_check(im);
2337 #ifdef WITH_PIECHART
2339 double PieStart=0.0;
2344 double areazero = 0.0;
2345 enum gf_en stack_gf = GF_PRINT;
2346 graph_desc_t *lastgdes = NULL;
2348 /* if we are lazy and there is nothing to PRINT ... quit now */
2349 if (lazy && im->prt_c==0) return 0;
2351 /* pull the data from the rrd files ... */
2353 if(data_fetch(im)==-1)
2356 /* evaluate VDEF and CDEF operations ... */
2357 if(data_calc(im)==-1)
2360 #ifdef WITH_PIECHART
2361 /* check if we need to draw a piechart */
2362 for(i=0;i<im->gdes_c;i++){
2363 if (im->gdes[i].gf == GF_PART) {
2370 /* calculate and PRINT and GPRINT definitions. We have to do it at
2371 * this point because it will affect the length of the legends
2372 * if there are no graph elements we stop here ...
2373 * if we are lazy, try to quit ...
2375 i=print_calc(im,calcpr);
2378 #ifdef WITH_PIECHART
2381 ) || lazy) return 0;
2383 #ifdef WITH_PIECHART
2384 /* If there's only the pie chart to draw, signal this */
2385 if (i==0) piechart=2;
2388 /* get actual drawing data and find min and max values*/
2389 if(data_proc(im)==-1)
2392 if(!im->logarithmic){si_unit(im);} /* identify si magnitude Kilo, Mega Giga ? */
2394 if(!im->rigid && ! im->logarithmic)
2395 expand_range(im); /* make sure the upper and lower limit are
2398 if (!calc_horizontal_grid(im))
2405 /**************************************************************
2406 *** Calculating sizes and locations became a bit confusing ***
2407 *** so I moved this into a separate function. ***
2408 **************************************************************/
2409 if(graph_size_location(im,i
2410 #ifdef WITH_PIECHART
2416 /* the actual graph is created by going through the individual
2417 graph elements and then drawing them */
2419 node=gfx_new_area ( im->canvas,
2423 im->graph_col[GRC_BACK]);
2425 gfx_add_point(node,im->ximg, 0);
2427 #ifdef WITH_PIECHART
2428 if (piechart != 2) {
2430 node=gfx_new_area ( im->canvas,
2431 im->xorigin, im->yorigin,
2432 im->xorigin + im->xsize, im->yorigin,
2433 im->xorigin + im->xsize, im->yorigin-im->ysize,
2434 im->graph_col[GRC_CANVAS]);
2436 gfx_add_point(node,im->xorigin, im->yorigin - im->ysize);
2438 if (im->minval > 0.0)
2439 areazero = im->minval;
2440 if (im->maxval < 0.0)
2441 areazero = im->maxval;
2442 #ifdef WITH_PIECHART
2446 #ifdef WITH_PIECHART
2448 pie_part(im,im->graph_col[GRC_CANVAS],im->pie_x,im->pie_y,im->piesize*0.5,0,2*M_PI);
2452 for(i=0;i<im->gdes_c;i++){
2453 switch(im->gdes[i].gf){
2466 for (ii = 0; ii < im->xsize; ii++)
2468 if (!isnan(im->gdes[i].p_data[ii]) &&
2469 im->gdes[i].p_data[ii] > 0.0)
2471 /* generate a tick */
2472 gfx_new_line(im->canvas, im -> xorigin + ii,
2473 im -> yorigin - (im -> gdes[i].yrule * im -> ysize),
2477 im -> gdes[i].col );
2483 stack_gf = im->gdes[i].gf;
2485 /* fix data points at oo and -oo */
2486 for(ii=0;ii<im->xsize;ii++){
2487 if (isinf(im->gdes[i].p_data[ii])){
2488 if (im->gdes[i].p_data[ii] > 0) {
2489 im->gdes[i].p_data[ii] = im->maxval ;
2491 im->gdes[i].p_data[ii] = im->minval ;
2497 /* *******************************************************
2502 -------|--t-1--t--------------------------------
2504 if we know the value at time t was a then
2505 we draw a square from t-1 to t with the value a.
2507 ********************************************************* */
2508 if (im->gdes[i].col != 0x0){
2509 /* GF_LINE and friend */
2510 if(stack_gf == GF_LINE ){
2513 for(ii=1;ii<im->xsize;ii++){
2514 if (isnan(im->gdes[i].p_data[ii]) || (im->slopemode==1 && isnan(im->gdes[i].p_data[ii-1]))){
2518 if ( node == NULL ) {
2519 last_y = ytr(im,im->gdes[i].p_data[ii]);
2520 if ( im->slopemode == 0 ){
2521 node = gfx_new_line(im->canvas,
2522 ii-1+im->xorigin,last_y,
2523 ii+im->xorigin,last_y,
2524 im->gdes[i].linewidth,
2527 node = gfx_new_line(im->canvas,
2528 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii-1]),
2529 ii+im->xorigin,last_y,
2530 im->gdes[i].linewidth,
2534 double new_y = ytr(im,im->gdes[i].p_data[ii]);
2535 if ( im->slopemode==0 && ! AlmostEqual2sComplement(new_y,last_y,4)){
2536 gfx_add_point(node,ii-1+im->xorigin,new_y);
2539 gfx_add_point(node,ii+im->xorigin,new_y);
2545 double *foreY=malloc(sizeof(double)*im->xsize*2);
2546 double *foreX=malloc(sizeof(double)*im->xsize*2);
2547 double *backY=malloc(sizeof(double)*im->xsize*2);
2548 double *backX=malloc(sizeof(double)*im->xsize*2);
2550 for(ii=0;ii<=im->xsize;ii++){
2552 if ( idxI > 0 && ( drawem != 0 || ii==im->xsize)){
2555 while (cntI < idxI && AlmostEqual2sComplement(foreY[lastI],foreY[cntI],4) && AlmostEqual2sComplement(foreY[lastI],foreY[cntI+1],4)){cntI++;}
2556 node = gfx_new_area(im->canvas,
2559 foreX[cntI],foreY[cntI], im->gdes[i].col);
2560 while (cntI < idxI) {
2563 while ( cntI < idxI && AlmostEqual2sComplement(foreY[lastI],foreY[cntI],4) && AlmostEqual2sComplement(foreY[lastI],foreY[cntI+1],4)){cntI++;}
2564 gfx_add_point(node,foreX[cntI],foreY[cntI]);
2566 gfx_add_point(node,backX[idxI],backY[idxI]);
2570 while ( idxI > 1 && AlmostEqual2sComplement(backY[lastI], backY[idxI],4) && AlmostEqual2sComplement(backY[lastI],backY[idxI-1],4)){idxI--;}
2571 gfx_add_point(node,backX[idxI],backY[idxI]);
2580 if (ii == im->xsize) break;
2582 /* keep things simple for now, just draw these bars
2583 do not try to build a big and complex area */
2586 if ( im->slopemode == 0 && ii==0){
2589 if ( isnan(im->gdes[i].p_data[ii]) ) {
2593 ytop = ytr(im,im->gdes[i].p_data[ii]);
2594 if ( lastgdes && im->gdes[i].stack ) {
2595 ybase = ytr(im,lastgdes->p_data[ii]);
2597 ybase = ytr(im,areazero);
2599 if ( ybase == ytop ){
2603 /* every area has to be wound clock-wise,
2604 so we have to make sur base remains base */
2606 double extra = ytop;
2610 if ( im->slopemode == 0 ){
2611 backY[++idxI] = ybase-0.2;
2612 backX[idxI] = ii+im->xorigin-1;
2613 foreY[idxI] = ytop+0.2;
2614 foreX[idxI] = ii+im->xorigin-1;
2616 backY[++idxI] = ybase-0.2;
2617 backX[idxI] = ii+im->xorigin;
2618 foreY[idxI] = ytop+0.2;
2619 foreX[idxI] = ii+im->xorigin;
2621 /* close up any remaining area */
2626 } /* else GF_LINE */
2627 } /* if color != 0x0 */
2628 /* make sure we do not run into trouble when stacking on NaN */
2629 for(ii=0;ii<im->xsize;ii++){
2630 if (isnan(im->gdes[i].p_data[ii])) {
2631 if (lastgdes && (im->gdes[i].stack)) {
2632 im->gdes[i].p_data[ii] = lastgdes->p_data[ii];
2634 im->gdes[i].p_data[ii] = areazero;
2638 lastgdes = &(im->gdes[i]);
2640 #ifdef WITH_PIECHART
2642 if(isnan(im->gdes[i].yrule)) /* fetch variable */
2643 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2645 if (finite(im->gdes[i].yrule)) { /* even the fetched var can be NaN */
2646 pie_part(im,im->gdes[i].col,
2647 im->pie_x,im->pie_y,im->piesize*0.4,
2648 M_PI*2.0*PieStart/100.0,
2649 M_PI*2.0*(PieStart+im->gdes[i].yrule)/100.0);
2650 PieStart += im->gdes[i].yrule;
2657 #ifdef WITH_PIECHART
2665 /* grid_paint also does the text */
2666 if( !(im->extra_flags & ONLY_GRAPH) )
2670 if( !(im->extra_flags & ONLY_GRAPH) )
2673 /* the RULES are the last thing to paint ... */
2674 for(i=0;i<im->gdes_c;i++){
2676 switch(im->gdes[i].gf){
2678 if(isnan(im->gdes[i].yrule)) { /* fetch variable */
2679 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2681 if(im->gdes[i].yrule >= im->minval
2682 && im->gdes[i].yrule <= im->maxval)
2683 gfx_new_line(im->canvas,
2684 im->xorigin,ytr(im,im->gdes[i].yrule),
2685 im->xorigin+im->xsize,ytr(im,im->gdes[i].yrule),
2686 1.0,im->gdes[i].col);
2689 if(im->gdes[i].xrule == 0) { /* fetch variable */
2690 im->gdes[i].xrule = im->gdes[im->gdes[i].vidx].vf.when;
2692 if(im->gdes[i].xrule >= im->start
2693 && im->gdes[i].xrule <= im->end)
2694 gfx_new_line(im->canvas,
2695 xtr(im,im->gdes[i].xrule),im->yorigin,
2696 xtr(im,im->gdes[i].xrule),im->yorigin-im->ysize,
2697 1.0,im->gdes[i].col);
2705 if (strcmp(im->graphfile,"-")==0) {
2706 fo = im->graphhandle ? im->graphhandle : stdout;
2707 #if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
2708 /* Change translation mode for stdout to BINARY */
2709 _setmode( _fileno( fo ), O_BINARY );
2712 if ((fo = fopen(im->graphfile,"wb")) == NULL) {
2713 rrd_set_error("Opening '%s' for write: %s",im->graphfile,
2714 rrd_strerror(errno));
2718 gfx_render (im->canvas,im->ximg,im->yimg,0x00000000,fo);
2719 if (strcmp(im->graphfile,"-") != 0)
2725 /*****************************************************
2727 *****************************************************/
2730 gdes_alloc(image_desc_t *im){
2733 if ((im->gdes = (graph_desc_t *) rrd_realloc(im->gdes, (im->gdes_c)
2734 * sizeof(graph_desc_t)))==NULL){
2735 rrd_set_error("realloc graph_descs");
2740 im->gdes[im->gdes_c-1].step=im->step;
2741 im->gdes[im->gdes_c-1].step_orig=im->step;
2742 im->gdes[im->gdes_c-1].stack=0;
2743 im->gdes[im->gdes_c-1].debug=0;
2744 im->gdes[im->gdes_c-1].start=im->start;
2745 im->gdes[im->gdes_c-1].end=im->end;
2746 im->gdes[im->gdes_c-1].vname[0]='\0';
2747 im->gdes[im->gdes_c-1].data=NULL;
2748 im->gdes[im->gdes_c-1].ds_namv=NULL;
2749 im->gdes[im->gdes_c-1].data_first=0;
2750 im->gdes[im->gdes_c-1].p_data=NULL;
2751 im->gdes[im->gdes_c-1].rpnp=NULL;
2752 im->gdes[im->gdes_c-1].shift=0;
2753 im->gdes[im->gdes_c-1].col = 0x0;
2754 im->gdes[im->gdes_c-1].legend[0]='\0';
2755 im->gdes[im->gdes_c-1].format[0]='\0';
2756 im->gdes[im->gdes_c-1].rrd[0]='\0';
2757 im->gdes[im->gdes_c-1].ds=-1;
2758 im->gdes[im->gdes_c-1].p_data=NULL;
2759 im->gdes[im->gdes_c-1].yrule=DNAN;
2760 im->gdes[im->gdes_c-1].xrule=0;
2764 /* copies input untill the first unescaped colon is found
2765 or until input ends. backslashes have to be escaped as well */
2767 scan_for_col(const char *const input, int len, char *const output)
2772 input[inp] != ':' &&
2775 if (input[inp] == '\\' &&
2776 input[inp+1] != '\0' &&
2777 (input[inp+1] == '\\' ||
2778 input[inp+1] == ':')){
2779 output[outp++] = input[++inp];
2782 output[outp++] = input[inp];
2785 output[outp] = '\0';
2788 /* Some surgery done on this function, it became ridiculously big.
2790 ** - initializing now in rrd_graph_init()
2791 ** - options parsing now in rrd_graph_options()
2792 ** - script parsing now in rrd_graph_script()
2795 rrd_graph(int argc, char **argv, char ***prdata, int *xsize, int *ysize, FILE *stream, double *ymin, double *ymax)
2798 rrd_graph_init(&im);
2799 im.graphhandle = stream;
2801 rrd_graph_options(argc,argv,&im);
2802 if (rrd_test_error()) {
2807 if (strlen(argv[optind])>=MAXPATH) {
2808 rrd_set_error("filename (including path) too long");
2812 strncpy(im.graphfile,argv[optind],MAXPATH-1);
2813 im.graphfile[MAXPATH-1]='\0';
2815 rrd_graph_script(argc,argv,&im,1);
2816 if (rrd_test_error()) {
2821 /* Everything is now read and the actual work can start */
2824 if (graph_paint(&im,prdata)==-1){
2829 /* The image is generated and needs to be output.
2830 ** Also, if needed, print a line with information about the image.
2840 /* maybe prdata is not allocated yet ... lets do it now */
2841 if ((*prdata = calloc(2,sizeof(char *)))==NULL) {
2842 rrd_set_error("malloc imginfo");
2846 if(((*prdata)[0] = malloc((strlen(im.imginfo)+200+strlen(im.graphfile))*sizeof(char)))
2848 rrd_set_error("malloc imginfo");
2851 filename=im.graphfile+strlen(im.graphfile);
2852 while(filename > im.graphfile) {
2853 if (*(filename-1)=='/' || *(filename-1)=='\\' ) break;
2857 sprintf((*prdata)[0],im.imginfo,filename,(long)(im.canvas->zoom*im.ximg),(long)(im.canvas->zoom*im.yimg));
2864 rrd_graph_init(image_desc_t *im)
2871 #ifdef HAVE_SETLOCALE
2872 setlocale(LC_TIME,"");
2877 im->xlab_user.minsec = -1;
2883 im->ylegend[0] = '\0';
2884 im->title[0] = '\0';
2887 im->unitsexponent= 9999;
2890 im->viewfactor = 1.0;
2897 im->logarithmic = 0;
2898 im->ygridstep = DNAN;
2899 im->draw_x_grid = 1;
2900 im->draw_y_grid = 1;
2905 im->canvas = gfx_new_canvas();
2906 im->grid_dash_on = 1;
2907 im->grid_dash_off = 1;
2908 im->tabwidth = 40.0;
2910 for(i=0;i<DIM(graph_col);i++)
2911 im->graph_col[i]=graph_col[i];
2913 #if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
2916 char rrd_win_default_font[1000];
2917 windir = getenv("windir");
2918 /* %windir% is something like D:\windows or C:\winnt */
2919 if (windir != NULL) {
2920 strncpy(rrd_win_default_font,windir,999);
2921 rrd_win_default_font[999] = '\0';
2922 strcat(rrd_win_default_font,"\\fonts\\");
2923 strcat(rrd_win_default_font,RRD_DEFAULT_FONT);
2924 for(i=0;i<DIM(text_prop);i++){
2925 strncpy(text_prop[i].font,rrd_win_default_font,sizeof(text_prop[i].font)-1);
2926 text_prop[i].font[sizeof(text_prop[i].font)-1] = '\0';
2933 deffont = getenv("RRD_DEFAULT_FONT");
2934 if (deffont != NULL) {
2935 for(i=0;i<DIM(text_prop);i++){
2936 strncpy(text_prop[i].font,deffont,sizeof(text_prop[i].font)-1);
2937 text_prop[i].font[sizeof(text_prop[i].font)-1] = '\0';
2941 for(i=0;i<DIM(text_prop);i++){
2942 im->text_prop[i].size = text_prop[i].size;
2943 strcpy(im->text_prop[i].font,text_prop[i].font);
2948 rrd_graph_options(int argc, char *argv[],image_desc_t *im)
2951 char *parsetime_error = NULL;
2952 char scan_gtm[12],scan_mtm[12],scan_ltm[12],col_nam[12];
2953 time_t start_tmp=0,end_tmp=0;
2955 struct rrd_time_value start_tv, end_tv;
2957 optind = 0; opterr = 0; /* initialize getopt */
2959 parsetime("end-24h", &start_tv);
2960 parsetime("now", &end_tv);
2963 static struct option long_options[] =
2965 {"start", required_argument, 0, 's'},
2966 {"end", required_argument, 0, 'e'},
2967 {"x-grid", required_argument, 0, 'x'},
2968 {"y-grid", required_argument, 0, 'y'},
2969 {"vertical-label",required_argument,0,'v'},
2970 {"width", required_argument, 0, 'w'},
2971 {"height", required_argument, 0, 'h'},
2972 {"interlaced", no_argument, 0, 'i'},
2973 {"upper-limit",required_argument, 0, 'u'},
2974 {"lower-limit",required_argument, 0, 'l'},
2975 {"rigid", no_argument, 0, 'r'},
2976 {"base", required_argument, 0, 'b'},
2977 {"logarithmic",no_argument, 0, 'o'},
2978 {"color", required_argument, 0, 'c'},
2979 {"font", required_argument, 0, 'n'},
2980 {"title", required_argument, 0, 't'},
2981 {"imginfo", required_argument, 0, 'f'},
2982 {"imgformat", required_argument, 0, 'a'},
2983 {"lazy", no_argument, 0, 'z'},
2984 {"zoom", required_argument, 0, 'm'},
2985 {"no-legend", no_argument, 0, 'g'},
2986 {"force-rules-legend",no_argument,0, 'F'},
2987 {"only-graph", no_argument, 0, 'j'},
2988 {"alt-y-grid", no_argument, 0, 'Y'},
2989 {"no-minor", no_argument, 0, 'I'},
2990 {"slope-mode", no_argument, 0, 'E'},
2991 {"alt-autoscale", no_argument, 0, 'A'},
2992 {"alt-autoscale-max", no_argument, 0, 'M'},
2993 {"no-gridfit", no_argument, 0, 'N'},
2994 {"units-exponent",required_argument, 0, 'X'},
2995 {"units-length",required_argument, 0, 'L'},
2996 {"step", required_argument, 0, 'S'},
2997 {"tabwidth", required_argument, 0, 'T'},
2998 {"font-render-mode", required_argument, 0, 'R'},
2999 {"font-smoothing-threshold", required_argument, 0, 'B'},
3000 {"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 */
3002 int option_index = 0;
3004 int col_start,col_end;
3006 opt = getopt_long(argc, argv,
3007 "s:e:x:y:v:w:h:iu:l:rb:oc:n:m:t:f:a:I:zgjFYAMEX:L:S:T:NR:B:",
3008 long_options, &option_index);
3015 im->extra_flags |= NOMINOR;
3018 im->extra_flags |= ALTYGRID;
3021 im->extra_flags |= ALTAUTOSCALE;
3024 im->extra_flags |= ALTAUTOSCALE_MAX;
3027 im->extra_flags |= ONLY_GRAPH;
3030 im->extra_flags |= NOLEGEND;
3033 im->extra_flags |= FORCE_RULES_LEGEND;
3036 im->unitsexponent = atoi(optarg);
3039 im->unitslength = atoi(optarg);
3042 im->tabwidth = atof(optarg);
3045 im->step = atoi(optarg);
3051 if ((parsetime_error = parsetime(optarg, &start_tv))) {
3052 rrd_set_error( "start time: %s", parsetime_error );
3057 if ((parsetime_error = parsetime(optarg, &end_tv))) {
3058 rrd_set_error( "end time: %s", parsetime_error );
3063 if(strcmp(optarg,"none") == 0){
3069 "%10[A-Z]:%ld:%10[A-Z]:%ld:%10[A-Z]:%ld:%ld:%n",
3071 &im->xlab_user.gridst,
3073 &im->xlab_user.mgridst,
3075 &im->xlab_user.labst,
3076 &im->xlab_user.precis,
3077 &stroff) == 7 && stroff != 0){
3078 strncpy(im->xlab_form, optarg+stroff, sizeof(im->xlab_form) - 1);
3079 im->xlab_form[sizeof(im->xlab_form)-1] = '\0';
3080 if((int)(im->xlab_user.gridtm = tmt_conv(scan_gtm)) == -1){
3081 rrd_set_error("unknown keyword %s",scan_gtm);
3083 } else if ((int)(im->xlab_user.mgridtm = tmt_conv(scan_mtm)) == -1){
3084 rrd_set_error("unknown keyword %s",scan_mtm);
3086 } else if ((int)(im->xlab_user.labtm = tmt_conv(scan_ltm)) == -1){
3087 rrd_set_error("unknown keyword %s",scan_ltm);
3090 im->xlab_user.minsec = 1;
3091 im->xlab_user.stst = im->xlab_form;
3093 rrd_set_error("invalid x-grid format");
3099 if(strcmp(optarg,"none") == 0){
3107 &im->ylabfact) == 2) {
3108 if(im->ygridstep<=0){
3109 rrd_set_error("grid step must be > 0");
3111 } else if (im->ylabfact < 1){
3112 rrd_set_error("label factor must be > 0");
3116 rrd_set_error("invalid y-grid format");
3121 strncpy(im->ylegend,optarg,150);
3122 im->ylegend[150]='\0';
3125 im->maxval = atof(optarg);
3128 im->minval = atof(optarg);
3131 im->base = atol(optarg);
3132 if(im->base != 1024 && im->base != 1000 ){
3133 rrd_set_error("the only sensible value for base apart from 1000 is 1024");
3138 long_tmp = atol(optarg);
3139 if (long_tmp < 10) {
3140 rrd_set_error("width below 10 pixels");
3143 im->xsize = long_tmp;
3146 long_tmp = atol(optarg);
3147 if (long_tmp < 10) {
3148 rrd_set_error("height below 10 pixels");
3151 im->ysize = long_tmp;
3154 im->canvas->interlaced = 1;
3160 im->imginfo = optarg;
3163 if((int)(im->canvas->imgformat = if_conv(optarg)) == -1) {
3164 rrd_set_error("unsupported graphics format '%s'",optarg);
3176 im->logarithmic = 1;
3177 if (isnan(im->minval))
3182 "%10[A-Z]#%n%8lx%n",
3183 col_nam,&col_start,&color,&col_end) == 2){
3185 int col_len = col_end - col_start;
3189 ((color & 0xF00) * 0x110000) |
3190 ((color & 0x0F0) * 0x011000) |
3191 ((color & 0x00F) * 0x001100) |
3197 ((color & 0xF000) * 0x11000) |
3198 ((color & 0x0F00) * 0x01100) |
3199 ((color & 0x00F0) * 0x00110) |
3200 ((color & 0x000F) * 0x00011)
3204 color = (color << 8) + 0xff /* shift left by 8 */;
3209 rrd_set_error("the color format is #RRGGBB[AA]");
3212 if((ci=grc_conv(col_nam)) != -1){
3213 im->graph_col[ci]=color;
3215 rrd_set_error("invalid color name '%s'",col_nam);
3219 rrd_set_error("invalid color def format");
3226 char font[1024] = "";
3229 "%10[A-Z]:%lf:%1000s",
3230 prop,&size,font) >= 2){
3232 if((sindex=text_prop_conv(prop)) != -1){
3233 for (propidx=sindex;propidx<TEXT_PROP_LAST;propidx++){
3235 im->text_prop[propidx].size=size;
3237 if (strlen(font) > 0){
3238 strcpy(im->text_prop[propidx].font,font);
3240 if (propidx==sindex && sindex != 0) break;
3243 rrd_set_error("invalid fonttag '%s'",prop);
3247 rrd_set_error("invalid text property format");
3253 im->canvas->zoom = atof(optarg);
3254 if (im->canvas->zoom <= 0.0) {
3255 rrd_set_error("zoom factor must be > 0");
3260 strncpy(im->title,optarg,150);
3261 im->title[150]='\0';
3265 if ( strcmp( optarg, "normal" ) == 0 )
3266 im->canvas->aa_type = AA_NORMAL;
3267 else if ( strcmp( optarg, "light" ) == 0 )
3268 im->canvas->aa_type = AA_LIGHT;
3269 else if ( strcmp( optarg, "mono" ) == 0 )
3270 im->canvas->aa_type = AA_NONE;
3273 rrd_set_error("unknown font-render-mode '%s'", optarg );
3279 im->canvas->font_aa_threshold = atof(optarg);
3284 rrd_set_error("unknown option '%c'", optopt);
3286 rrd_set_error("unknown option '%s'",argv[optind-1]);
3291 if (optind >= argc) {
3292 rrd_set_error("missing filename");
3296 if (im->logarithmic == 1 && (im->minval <= 0 || isnan(im->minval))){
3297 rrd_set_error("for a logarithmic yaxis you must specify a lower-limit > 0");
3301 if (proc_start_end(&start_tv,&end_tv,&start_tmp,&end_tmp) == -1){
3302 /* error string is set in parsetime.c */
3306 if (start_tmp < 3600*24*365*10){
3307 rrd_set_error("the first entry to fetch should be after 1980 (%ld)",start_tmp);
3311 if (end_tmp < start_tmp) {
3312 rrd_set_error("start (%ld) should be less than end (%ld)",
3313 start_tmp, end_tmp);
3317 im->start = start_tmp;
3319 im->step = max((long)im->step, (im->end-im->start)/im->xsize);
3323 rrd_graph_check_vname(image_desc_t *im, char *varname, char *err)
3325 if ((im->gdes[im->gdes_c-1].vidx=find_var(im,varname))==-1) {
3326 rrd_set_error("Unknown variable '%s' in %s",varname,err);
3332 rrd_graph_color(image_desc_t *im, char *var, char *err, int optional)
3335 graph_desc_t *gdp=&im->gdes[im->gdes_c-1];
3337 color=strstr(var,"#");
3340 rrd_set_error("Found no color in %s",err);
3349 rest=strstr(color,":");
3357 sscanf(color,"#%6lx%n",&col,&n);
3358 col = (col << 8) + 0xff /* shift left by 8 */;
3359 if (n!=7) rrd_set_error("Color problem in %s",err);
3362 sscanf(color,"#%8lx%n",&col,&n);
3365 rrd_set_error("Color problem in %s",err);
3367 if (rrd_test_error()) return 0;
3374 int bad_format(char *fmt) {
3378 while (*ptr != '\0')
3379 if (*ptr++ == '%') {
3381 /* line cannot end with percent char */
3382 if (*ptr == '\0') return 1;
3384 /* '%s', '%S' and '%%' are allowed */
3385 if (*ptr == 's' || *ptr == 'S' || *ptr == '%') ptr++;
3387 /* %c is allowed (but use only with vdef!) */
3388 else if (*ptr == 'c') {
3393 /* or else '% 6.2lf' and such are allowed */
3395 /* optional padding character */
3396 if (*ptr == ' ' || *ptr == '+' || *ptr == '-') ptr++;
3398 /* This should take care of 'm.n' with all three optional */
3399 while (*ptr >= '0' && *ptr <= '9') ptr++;
3400 if (*ptr == '.') ptr++;
3401 while (*ptr >= '0' && *ptr <= '9') ptr++;
3403 /* Either 'le', 'lf' or 'lg' must follow here */
3404 if (*ptr++ != 'l') return 1;
3405 if (*ptr == 'e' || *ptr == 'f' || *ptr == 'g') ptr++;
3416 vdef_parse(gdes,str)
3417 struct graph_desc_t *gdes;
3418 const char *const str;
3420 /* A VDEF currently is either "func" or "param,func"
3421 * so the parsing is rather simple. Change if needed.
3428 sscanf(str,"%le,%29[A-Z]%n",¶m,func,&n);
3429 if (n== (int)strlen(str)) { /* matched */
3433 sscanf(str,"%29[A-Z]%n",func,&n);
3434 if (n== (int)strlen(str)) { /* matched */
3437 rrd_set_error("Unknown function string '%s' in VDEF '%s'"
3444 if (!strcmp("PERCENT",func)) gdes->vf.op = VDEF_PERCENT;
3445 else if (!strcmp("MAXIMUM",func)) gdes->vf.op = VDEF_MAXIMUM;
3446 else if (!strcmp("AVERAGE",func)) gdes->vf.op = VDEF_AVERAGE;
3447 else if (!strcmp("MINIMUM",func)) gdes->vf.op = VDEF_MINIMUM;
3448 else if (!strcmp("TOTAL", func)) gdes->vf.op = VDEF_TOTAL;
3449 else if (!strcmp("FIRST", func)) gdes->vf.op = VDEF_FIRST;
3450 else if (!strcmp("LAST", func)) gdes->vf.op = VDEF_LAST;
3451 else if (!strcmp("LSLSLOPE", func)) gdes->vf.op = VDEF_LSLSLOPE;
3452 else if (!strcmp("LSLINT", func)) gdes->vf.op = VDEF_LSLINT;
3453 else if (!strcmp("LSLCORREL",func)) gdes->vf.op = VDEF_LSLCORREL;
3455 rrd_set_error("Unknown function '%s' in VDEF '%s'\n"
3462 switch (gdes->vf.op) {
3464 if (isnan(param)) { /* no parameter given */
3465 rrd_set_error("Function '%s' needs parameter in VDEF '%s'\n"
3471 if (param>=0.0 && param<=100.0) {
3472 gdes->vf.param = param;
3473 gdes->vf.val = DNAN; /* undefined */
3474 gdes->vf.when = 0; /* undefined */
3476 rrd_set_error("Parameter '%f' out of range in VDEF '%s'\n"
3491 case VDEF_LSLCORREL:
3493 gdes->vf.param = DNAN;
3494 gdes->vf.val = DNAN;
3497 rrd_set_error("Function '%s' needs no parameter in VDEF '%s'\n"
3514 graph_desc_t *src,*dst;
3518 dst = &im->gdes[gdi];
3519 src = &im->gdes[dst->vidx];
3520 data = src->data + src->ds;
3521 steps = (src->end - src->start) / src->step;
3524 printf("DEBUG: start == %lu, end == %lu, %lu steps\n"
3531 switch (dst->vf.op) {
3532 case VDEF_PERCENT: {
3533 rrd_value_t * array;
3537 if ((array = malloc(steps*sizeof(double)))==NULL) {
3538 rrd_set_error("malloc VDEV_PERCENT");
3541 for (step=0;step < steps; step++) {
3542 array[step]=data[step*src->ds_cnt];
3544 qsort(array,step,sizeof(double),vdef_percent_compar);
3546 field = (steps-1)*dst->vf.param/100;
3547 dst->vf.val = array[field];
3548 dst->vf.when = 0; /* no time component */
3551 for(step=0;step<steps;step++)
3552 printf("DEBUG: %3li:%10.2f %c\n",step,array[step],step==field?'*':' ');
3558 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3559 if (step == steps) {
3563 dst->vf.val = data[step*src->ds_cnt];
3564 dst->vf.when = src->start + (step+1)*src->step;
3566 while (step != steps) {
3567 if (finite(data[step*src->ds_cnt])) {
3568 if (data[step*src->ds_cnt] > dst->vf.val) {
3569 dst->vf.val = data[step*src->ds_cnt];
3570 dst->vf.when = src->start + (step+1)*src->step;
3577 case VDEF_AVERAGE: {
3580 for (step=0;step<steps;step++) {
3581 if (finite(data[step*src->ds_cnt])) {
3582 sum += data[step*src->ds_cnt];
3587 if (dst->vf.op == VDEF_TOTAL) {
3588 dst->vf.val = sum*src->step;
3589 dst->vf.when = cnt*src->step; /* not really "when" */
3591 dst->vf.val = sum/cnt;
3592 dst->vf.when = 0; /* no time component */
3602 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3603 if (step == steps) {
3607 dst->vf.val = data[step*src->ds_cnt];
3608 dst->vf.when = src->start + (step+1)*src->step;
3610 while (step != steps) {
3611 if (finite(data[step*src->ds_cnt])) {
3612 if (data[step*src->ds_cnt] < dst->vf.val) {
3613 dst->vf.val = data[step*src->ds_cnt];
3614 dst->vf.when = src->start + (step+1)*src->step;
3621 /* The time value returned here is one step before the
3622 * actual time value. This is the start of the first
3626 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3627 if (step == steps) { /* all entries were NaN */
3631 dst->vf.val = data[step*src->ds_cnt];
3632 dst->vf.when = src->start + step*src->step;
3636 /* The time value returned here is the
3637 * actual time value. This is the end of the last
3641 while (step >= 0 && isnan(data[step*src->ds_cnt])) step--;
3642 if (step < 0) { /* all entries were NaN */
3646 dst->vf.val = data[step*src->ds_cnt];
3647 dst->vf.when = src->start + (step+1)*src->step;
3652 case VDEF_LSLCORREL:{
3653 /* Bestfit line by linear least squares method */
3656 double SUMx, SUMy, SUMxy, SUMxx, SUMyy, slope, y_intercept, correl ;
3657 SUMx = 0; SUMy = 0; SUMxy = 0; SUMxx = 0; SUMyy = 0;
3659 for (step=0;step<steps;step++) {
3660 if (finite(data[step*src->ds_cnt])) {
3663 SUMxx += step * step;
3664 SUMxy += step * data[step*src->ds_cnt];
3665 SUMy += data[step*src->ds_cnt];
3666 SUMyy += data[step*src->ds_cnt]*data[step*src->ds_cnt];
3670 slope = ( SUMx*SUMy - cnt*SUMxy ) / ( SUMx*SUMx - cnt*SUMxx );
3671 y_intercept = ( SUMy - slope*SUMx ) / cnt;
3672 correl = (SUMxy - (SUMx*SUMy)/cnt) / sqrt((SUMxx - (SUMx*SUMx)/cnt)*(SUMyy - (SUMy*SUMy)/cnt));
3675 if (dst->vf.op == VDEF_LSLSLOPE) {
3676 dst->vf.val = slope;
3677 dst->vf.when = cnt*src->step;
3678 } else if (dst->vf.op == VDEF_LSLINT) {
3679 dst->vf.val = y_intercept;
3680 dst->vf.when = cnt*src->step;
3681 } else if (dst->vf.op == VDEF_LSLCORREL) {
3682 dst->vf.val = correl;
3683 dst->vf.when = cnt*src->step;
3696 /* NaN < -INF < finite_values < INF */
3698 vdef_percent_compar(a,b)
3701 /* Equality is not returned; this doesn't hurt except
3702 * (maybe) for a little performance.
3705 /* First catch NaN values. They are smallest */
3706 if (isnan( *(double *)a )) return -1;
3707 if (isnan( *(double *)b )) return 1;
3709 /* NaN doesn't reach this part so INF and -INF are extremes.
3710 * The sign from isinf() is compatible with the sign we return
3712 if (isinf( *(double *)a )) return isinf( *(double *)a );
3713 if (isinf( *(double *)b )) return isinf( *(double *)b );
3715 /* If we reach this, both values must be finite */
3716 if ( *(double *)a < *(double *)b ) return -1; else return 1;