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");
1981 /* graph watermark */
1982 if(im->watermark[0] != '\0') {
1983 gfx_new_text( im->canvas,
1984 im->ximg/2, im->yimg-6,
1985 ( im->graph_col[GRC_FONT] & 0xffffff00 ) | 0x00000044,
1986 im->text_prop[TEXT_PROP_AXIS].font,
1987 5.5, im->tabwidth, 0,
1988 GFX_H_CENTER, GFX_V_BOTTOM,
1993 if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
1994 for(i=0;i<im->gdes_c;i++){
1995 if(im->gdes[i].legend[0] =='\0')
1998 /* im->gdes[i].leg_y is the bottom of the legend */
1999 X0 = im->gdes[i].leg_x;
2000 Y0 = im->gdes[i].leg_y;
2001 gfx_new_text ( im->canvas, X0, Y0,
2002 im->graph_col[GRC_FONT],
2003 im->text_prop[TEXT_PROP_LEGEND].font,
2004 im->text_prop[TEXT_PROP_LEGEND].size,
2005 im->tabwidth,0.0, GFX_H_LEFT, GFX_V_BOTTOM,
2006 im->gdes[i].legend );
2007 /* The legend for GRAPH items starts with "M " to have
2008 enough space for the box */
2009 if ( im->gdes[i].gf != GF_PRINT &&
2010 im->gdes[i].gf != GF_GPRINT &&
2011 im->gdes[i].gf != GF_COMMENT) {
2014 boxH = gfx_get_text_width(im->canvas, 0,
2015 im->text_prop[TEXT_PROP_LEGEND].font,
2016 im->text_prop[TEXT_PROP_LEGEND].size,
2017 im->tabwidth,"o", 0) * 1.2;
2020 /* make sure transparent colors show up the same way as in the graph */
2021 node = gfx_new_area(im->canvas,
2025 im->graph_col[GRC_BACK]);
2026 gfx_add_point ( node, X0+boxH, Y0-boxV );
2028 node = gfx_new_area(im->canvas,
2033 gfx_add_point ( node, X0+boxH, Y0-boxV );
2034 node = gfx_new_line(im->canvas,
2037 1.0,im->graph_col[GRC_FRAME]);
2038 gfx_add_point(node,X0+boxH,Y0);
2039 gfx_add_point(node,X0+boxH,Y0-boxV);
2040 gfx_close_path(node);
2047 /*****************************************************
2048 * lazy check make sure we rely need to create this graph
2049 *****************************************************/
2051 int lazy_check(image_desc_t *im){
2054 struct stat imgstat;
2056 if (im->lazy == 0) return 0; /* no lazy option */
2057 if (stat(im->graphfile,&imgstat) != 0)
2058 return 0; /* can't stat */
2059 /* one pixel in the existing graph is more then what we would
2061 if (time(NULL) - imgstat.st_mtime >
2062 (im->end - im->start) / im->xsize)
2064 if ((fd = fopen(im->graphfile,"rb")) == NULL)
2065 return 0; /* the file does not exist */
2066 switch (im->canvas->imgformat) {
2068 size = PngSize(fd,&(im->ximg),&(im->yimg));
2077 #ifdef WITH_PIECHART
2079 pie_part(image_desc_t *im, gfx_color_t color,
2080 double PieCenterX, double PieCenterY, double Radius,
2081 double startangle, double endangle)
2085 double step=M_PI/50; /* Number of iterations for the circle;
2086 ** 10 is definitely too low, more than
2087 ** 50 seems to be overkill
2090 /* Strange but true: we have to work clockwise or else
2091 ** anti aliasing nor transparency don't work.
2093 ** This test is here to make sure we do it right, also
2094 ** this makes the for...next loop more easy to implement.
2095 ** The return will occur if the user enters a negative number
2096 ** (which shouldn't be done according to the specs) or if the
2097 ** programmers do something wrong (which, as we all know, never
2098 ** happens anyway :)
2100 if (endangle<startangle) return;
2102 /* Hidden feature: Radius decreases each full circle */
2104 while (angle>=2*M_PI) {
2109 node=gfx_new_area(im->canvas,
2110 PieCenterX+sin(startangle)*Radius,
2111 PieCenterY-cos(startangle)*Radius,
2114 PieCenterX+sin(endangle)*Radius,
2115 PieCenterY-cos(endangle)*Radius,
2117 for (angle=endangle;angle-startangle>=step;angle-=step) {
2119 PieCenterX+sin(angle)*Radius,
2120 PieCenterY-cos(angle)*Radius );
2127 graph_size_location(image_desc_t *im, int elements
2129 #ifdef WITH_PIECHART
2135 /* The actual size of the image to draw is determined from
2136 ** several sources. The size given on the command line is
2137 ** the graph area but we need more as we have to draw labels
2138 ** and other things outside the graph area
2141 /* +-+-------------------------------------------+
2142 ** |l|.................title.....................|
2143 ** |e+--+-------------------------------+--------+
2146 ** |l| l| main graph area | chart |
2149 ** |r+--+-------------------------------+--------+
2150 ** |e| | x-axis labels | |
2151 ** |v+--+-------------------------------+--------+
2152 ** | |..............legends......................|
2153 ** +-+-------------------------------------------+
2155 ** +---------------------------------------------+
2161 #ifdef WITH_PIECHART
2166 Xlegend =0, Ylegend =0,
2168 Xspacing =15, Yspacing =15,
2172 if (im->extra_flags & ONLY_GRAPH) {
2174 im->ximg = im->xsize;
2175 im->yimg = im->ysize;
2176 im->yorigin = im->ysize;
2181 if (im->ylegend[0] != '\0' ) {
2182 Xvertical = im->text_prop[TEXT_PROP_UNIT].size *2;
2186 if (im->title[0] != '\0') {
2187 /* The title is placed "inbetween" two text lines so it
2188 ** automatically has some vertical spacing. The horizontal
2189 ** spacing is added here, on each side.
2191 /* don't care for the with of the title
2192 Xtitle = gfx_get_text_width(im->canvas, 0,
2193 im->text_prop[TEXT_PROP_TITLE].font,
2194 im->text_prop[TEXT_PROP_TITLE].size,
2196 im->title, 0) + 2*Xspacing; */
2197 Ytitle = im->text_prop[TEXT_PROP_TITLE].size*2.6+10;
2203 if (im->draw_x_grid) {
2204 Yxlabel=im->text_prop[TEXT_PROP_AXIS].size *2.5;
2206 if (im->draw_y_grid) {
2207 Xylabel=gfx_get_text_width(im->canvas, 0,
2208 im->text_prop[TEXT_PROP_AXIS].font,
2209 im->text_prop[TEXT_PROP_AXIS].size,
2211 "0", 0) * im->unitslength;
2215 #ifdef WITH_PIECHART
2217 im->piesize=im->xsize<im->ysize?im->xsize:im->ysize;
2223 /* Now calculate the total size. Insert some spacing where
2224 desired. im->xorigin and im->yorigin need to correspond
2225 with the lower left corner of the main graph area or, if
2226 this one is not set, the imaginary box surrounding the
2229 /* The legend width cannot yet be determined, as a result we
2230 ** have problems adjusting the image to it. For now, we just
2231 ** forget about it at all; the legend will have to fit in the
2232 ** size already allocated.
2234 im->ximg = Xylabel + Xmain + 2 * Xspacing;
2236 #ifdef WITH_PIECHART
2240 if (Xmain) im->ximg += Xspacing;
2241 #ifdef WITH_PIECHART
2242 if (Xpie) im->ximg += Xspacing;
2245 im->xorigin = Xspacing + Xylabel;
2247 /* the length of the title should not influence with width of the graph
2248 if (Xtitle > im->ximg) im->ximg = Xtitle; */
2250 if (Xvertical) { /* unit description */
2251 im->ximg += Xvertical;
2252 im->xorigin += Xvertical;
2256 /* The vertical size is interesting... we need to compare
2257 ** the sum of {Ytitle, Ymain, Yxlabel, Ylegend, Ywatermark} with
2258 ** Yvertical however we need to know {Ytitle+Ymain+Yxlabel}
2259 ** in order to start even thinking about Ylegend or Ywatermark.
2261 ** Do it in three portions: First calculate the inner part,
2262 ** then do the legend, then adjust the total height of the img,
2263 ** adding space for a watermark if one exists;
2266 /* reserve space for main and/or pie */
2268 im->yimg = Ymain + Yxlabel;
2270 #ifdef WITH_PIECHART
2271 if (im->yimg < Ypie) im->yimg = Ypie;
2274 im->yorigin = im->yimg - Yxlabel;
2276 /* reserve space for the title *or* some padding above the graph */
2279 im->yorigin += Ytitle;
2281 im->yimg += 1.5*Yspacing;
2282 im->yorigin += 1.5*Yspacing;
2284 /* reserve space for padding below the graph */
2285 im->yimg += Yspacing;
2287 /* Determine where to place the legends onto the image.
2288 ** Adjust im->yimg to match the space requirements.
2290 if(leg_place(im)==-1)
2293 if (im->watermark[0] != '\0') {
2294 im->yimg += Ywatermark;
2298 if (Xlegend > im->ximg) {
2300 /* reposition Pie */
2304 #ifdef WITH_PIECHART
2305 /* The pie is placed in the upper right hand corner,
2306 ** just below the title (if any) and with sufficient
2310 im->pie_x = im->ximg - Xspacing - Xpie/2;
2311 im->pie_y = im->yorigin-Ymain+Ypie/2;
2313 im->pie_x = im->ximg/2;
2314 im->pie_y = im->yorigin-Ypie/2;
2322 /* from http://www.cygnus-software.com/papers/comparingfloats/comparingfloats.htm */
2323 /* yes we are loosing precision by doing tos with floats instead of doubles
2324 but it seems more stable this way. */
2326 static int AlmostEqual2sComplement (float A, float B, int maxUlps)
2329 int aInt = *(int*)&A;
2330 int bInt = *(int*)&B;
2332 /* Make sure maxUlps is non-negative and small enough that the
2333 default NAN won't compare as equal to anything. */
2335 /* assert(maxUlps > 0 && maxUlps < 4 * 1024 * 1024); */
2337 /* Make aInt lexicographically ordered as a twos-complement int */
2340 aInt = 0x80000000l - aInt;
2342 /* Make bInt lexicographically ordered as a twos-complement int */
2345 bInt = 0x80000000l - bInt;
2347 intDiff = abs(aInt - bInt);
2349 if (intDiff <= maxUlps)
2355 /* draw that picture thing ... */
2357 graph_paint(image_desc_t *im, char ***calcpr)
2360 int lazy = lazy_check(im);
2361 #ifdef WITH_PIECHART
2363 double PieStart=0.0;
2368 double areazero = 0.0;
2369 graph_desc_t *lastgdes = NULL;
2371 /* if we are lazy and there is nothing to PRINT ... quit now */
2372 if (lazy && im->prt_c==0) return 0;
2374 /* pull the data from the rrd files ... */
2376 if(data_fetch(im)==-1)
2379 /* evaluate VDEF and CDEF operations ... */
2380 if(data_calc(im)==-1)
2383 #ifdef WITH_PIECHART
2384 /* check if we need to draw a piechart */
2385 for(i=0;i<im->gdes_c;i++){
2386 if (im->gdes[i].gf == GF_PART) {
2393 /* calculate and PRINT and GPRINT definitions. We have to do it at
2394 * this point because it will affect the length of the legends
2395 * if there are no graph elements we stop here ...
2396 * if we are lazy, try to quit ...
2398 i=print_calc(im,calcpr);
2401 #ifdef WITH_PIECHART
2404 ) || lazy) return 0;
2406 #ifdef WITH_PIECHART
2407 /* If there's only the pie chart to draw, signal this */
2408 if (i==0) piechart=2;
2411 /* get actual drawing data and find min and max values*/
2412 if(data_proc(im)==-1)
2415 if(!im->logarithmic){si_unit(im);} /* identify si magnitude Kilo, Mega Giga ? */
2417 if(!im->rigid && ! im->logarithmic)
2418 expand_range(im); /* make sure the upper and lower limit are
2421 if (!calc_horizontal_grid(im))
2428 /**************************************************************
2429 *** Calculating sizes and locations became a bit confusing ***
2430 *** so I moved this into a separate function. ***
2431 **************************************************************/
2432 if(graph_size_location(im,i
2433 #ifdef WITH_PIECHART
2439 /* the actual graph is created by going through the individual
2440 graph elements and then drawing them */
2442 node=gfx_new_area ( im->canvas,
2446 im->graph_col[GRC_BACK]);
2448 gfx_add_point(node,im->ximg, 0);
2450 #ifdef WITH_PIECHART
2451 if (piechart != 2) {
2453 node=gfx_new_area ( im->canvas,
2454 im->xorigin, im->yorigin,
2455 im->xorigin + im->xsize, im->yorigin,
2456 im->xorigin + im->xsize, im->yorigin-im->ysize,
2457 im->graph_col[GRC_CANVAS]);
2459 gfx_add_point(node,im->xorigin, im->yorigin - im->ysize);
2461 if (im->minval > 0.0)
2462 areazero = im->minval;
2463 if (im->maxval < 0.0)
2464 areazero = im->maxval;
2465 #ifdef WITH_PIECHART
2469 #ifdef WITH_PIECHART
2471 pie_part(im,im->graph_col[GRC_CANVAS],im->pie_x,im->pie_y,im->piesize*0.5,0,2*M_PI);
2475 for(i=0;i<im->gdes_c;i++){
2476 switch(im->gdes[i].gf){
2489 for (ii = 0; ii < im->xsize; ii++)
2491 if (!isnan(im->gdes[i].p_data[ii]) &&
2492 im->gdes[i].p_data[ii] != 0.0)
2494 if (im -> gdes[i].yrule > 0 ) {
2495 gfx_new_line(im->canvas,
2496 im -> xorigin + ii, im->yorigin,
2497 im -> xorigin + ii, im->yorigin - im -> gdes[i].yrule * im -> ysize,
2499 im -> gdes[i].col );
2500 } else if ( im -> gdes[i].yrule < 0 ) {
2501 gfx_new_line(im->canvas,
2502 im -> xorigin + ii, im->yorigin - im -> ysize,
2503 im -> xorigin + ii, im->yorigin - ( 1 - im -> gdes[i].yrule ) * im -> ysize,
2505 im -> gdes[i].col );
2513 /* fix data points at oo and -oo */
2514 for(ii=0;ii<im->xsize;ii++){
2515 if (isinf(im->gdes[i].p_data[ii])){
2516 if (im->gdes[i].p_data[ii] > 0) {
2517 im->gdes[i].p_data[ii] = im->maxval ;
2519 im->gdes[i].p_data[ii] = im->minval ;
2525 /* *******************************************************
2530 -------|--t-1--t--------------------------------
2532 if we know the value at time t was a then
2533 we draw a square from t-1 to t with the value a.
2535 ********************************************************* */
2536 if (im->gdes[i].col != 0x0){
2537 /* GF_LINE and friend */
2538 if(im->gdes[i].gf == GF_LINE ){
2541 for(ii=1;ii<im->xsize;ii++){
2542 if (isnan(im->gdes[i].p_data[ii]) || (im->slopemode==1 && isnan(im->gdes[i].p_data[ii-1]))){
2546 if ( node == NULL ) {
2547 last_y = ytr(im,im->gdes[i].p_data[ii]);
2548 if ( im->slopemode == 0 ){
2549 node = gfx_new_line(im->canvas,
2550 ii-1+im->xorigin,last_y,
2551 ii+im->xorigin,last_y,
2552 im->gdes[i].linewidth,
2555 node = gfx_new_line(im->canvas,
2556 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii-1]),
2557 ii+im->xorigin,last_y,
2558 im->gdes[i].linewidth,
2562 double new_y = ytr(im,im->gdes[i].p_data[ii]);
2563 if ( im->slopemode==0 && ! AlmostEqual2sComplement(new_y,last_y,4)){
2564 gfx_add_point(node,ii-1+im->xorigin,new_y);
2567 gfx_add_point(node,ii+im->xorigin,new_y);
2573 double *foreY=malloc(sizeof(double)*im->xsize*2);
2574 double *foreX=malloc(sizeof(double)*im->xsize*2);
2575 double *backY=malloc(sizeof(double)*im->xsize*2);
2576 double *backX=malloc(sizeof(double)*im->xsize*2);
2578 for(ii=0;ii<=im->xsize;ii++){
2580 if ( idxI > 0 && ( drawem != 0 || ii==im->xsize)){
2583 while (cntI < idxI && AlmostEqual2sComplement(foreY[lastI],foreY[cntI],4) && AlmostEqual2sComplement(foreY[lastI],foreY[cntI+1],4)){cntI++;}
2584 node = gfx_new_area(im->canvas,
2587 foreX[cntI],foreY[cntI], im->gdes[i].col);
2588 while (cntI < idxI) {
2591 while ( cntI < idxI && AlmostEqual2sComplement(foreY[lastI],foreY[cntI],4) && AlmostEqual2sComplement(foreY[lastI],foreY[cntI+1],4)){cntI++;}
2592 gfx_add_point(node,foreX[cntI],foreY[cntI]);
2594 gfx_add_point(node,backX[idxI],backY[idxI]);
2598 while ( idxI > 1 && AlmostEqual2sComplement(backY[lastI], backY[idxI],4) && AlmostEqual2sComplement(backY[lastI],backY[idxI-1],4)){idxI--;}
2599 gfx_add_point(node,backX[idxI],backY[idxI]);
2608 if (ii == im->xsize) break;
2610 /* keep things simple for now, just draw these bars
2611 do not try to build a big and complex area */
2614 if ( im->slopemode == 0 && ii==0){
2617 if ( isnan(im->gdes[i].p_data[ii]) ) {
2621 ytop = ytr(im,im->gdes[i].p_data[ii]);
2622 if ( lastgdes && im->gdes[i].stack ) {
2623 ybase = ytr(im,lastgdes->p_data[ii]);
2625 ybase = ytr(im,areazero);
2627 if ( ybase == ytop ){
2631 /* every area has to be wound clock-wise,
2632 so we have to make sur base remains base */
2634 double extra = ytop;
2638 if ( im->slopemode == 0 ){
2639 backY[++idxI] = ybase-0.2;
2640 backX[idxI] = ii+im->xorigin-1;
2641 foreY[idxI] = ytop+0.2;
2642 foreX[idxI] = ii+im->xorigin-1;
2644 backY[++idxI] = ybase-0.2;
2645 backX[idxI] = ii+im->xorigin;
2646 foreY[idxI] = ytop+0.2;
2647 foreX[idxI] = ii+im->xorigin;
2649 /* close up any remaining area */
2654 } /* else GF_LINE */
2655 } /* if color != 0x0 */
2656 /* make sure we do not run into trouble when stacking on NaN */
2657 for(ii=0;ii<im->xsize;ii++){
2658 if (isnan(im->gdes[i].p_data[ii])) {
2659 if (lastgdes && (im->gdes[i].stack)) {
2660 im->gdes[i].p_data[ii] = lastgdes->p_data[ii];
2662 im->gdes[i].p_data[ii] = areazero;
2666 lastgdes = &(im->gdes[i]);
2668 #ifdef WITH_PIECHART
2670 if(isnan(im->gdes[i].yrule)) /* fetch variable */
2671 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2673 if (finite(im->gdes[i].yrule)) { /* even the fetched var can be NaN */
2674 pie_part(im,im->gdes[i].col,
2675 im->pie_x,im->pie_y,im->piesize*0.4,
2676 M_PI*2.0*PieStart/100.0,
2677 M_PI*2.0*(PieStart+im->gdes[i].yrule)/100.0);
2678 PieStart += im->gdes[i].yrule;
2683 rrd_set_error("STACK should already be turned into LINE or AREA here");
2689 #ifdef WITH_PIECHART
2697 /* grid_paint also does the text */
2698 if( !(im->extra_flags & ONLY_GRAPH) )
2702 if( !(im->extra_flags & ONLY_GRAPH) )
2705 /* the RULES are the last thing to paint ... */
2706 for(i=0;i<im->gdes_c;i++){
2708 switch(im->gdes[i].gf){
2710 if(isnan(im->gdes[i].yrule)) { /* fetch variable */
2711 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2713 if(im->gdes[i].yrule >= im->minval
2714 && im->gdes[i].yrule <= im->maxval)
2715 gfx_new_line(im->canvas,
2716 im->xorigin,ytr(im,im->gdes[i].yrule),
2717 im->xorigin+im->xsize,ytr(im,im->gdes[i].yrule),
2718 1.0,im->gdes[i].col);
2721 if(im->gdes[i].xrule == 0) { /* fetch variable */
2722 im->gdes[i].xrule = im->gdes[im->gdes[i].vidx].vf.when;
2724 if(im->gdes[i].xrule >= im->start
2725 && im->gdes[i].xrule <= im->end)
2726 gfx_new_line(im->canvas,
2727 xtr(im,im->gdes[i].xrule),im->yorigin,
2728 xtr(im,im->gdes[i].xrule),im->yorigin-im->ysize,
2729 1.0,im->gdes[i].col);
2737 if (strcmp(im->graphfile,"-")==0) {
2738 fo = im->graphhandle ? im->graphhandle : stdout;
2739 #if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
2740 /* Change translation mode for stdout to BINARY */
2741 _setmode( _fileno( fo ), O_BINARY );
2744 if ((fo = fopen(im->graphfile,"wb")) == NULL) {
2745 rrd_set_error("Opening '%s' for write: %s",im->graphfile,
2746 rrd_strerror(errno));
2750 gfx_render (im->canvas,im->ximg,im->yimg,0x00000000,fo);
2751 if (strcmp(im->graphfile,"-") != 0)
2757 /*****************************************************
2759 *****************************************************/
2762 gdes_alloc(image_desc_t *im){
2765 if ((im->gdes = (graph_desc_t *) rrd_realloc(im->gdes, (im->gdes_c)
2766 * sizeof(graph_desc_t)))==NULL){
2767 rrd_set_error("realloc graph_descs");
2772 im->gdes[im->gdes_c-1].step=im->step;
2773 im->gdes[im->gdes_c-1].step_orig=im->step;
2774 im->gdes[im->gdes_c-1].stack=0;
2775 im->gdes[im->gdes_c-1].linewidth=0;
2776 im->gdes[im->gdes_c-1].debug=0;
2777 im->gdes[im->gdes_c-1].start=im->start;
2778 im->gdes[im->gdes_c-1].end=im->end;
2779 im->gdes[im->gdes_c-1].vname[0]='\0';
2780 im->gdes[im->gdes_c-1].data=NULL;
2781 im->gdes[im->gdes_c-1].ds_namv=NULL;
2782 im->gdes[im->gdes_c-1].data_first=0;
2783 im->gdes[im->gdes_c-1].p_data=NULL;
2784 im->gdes[im->gdes_c-1].rpnp=NULL;
2785 im->gdes[im->gdes_c-1].shift=0;
2786 im->gdes[im->gdes_c-1].col = 0x0;
2787 im->gdes[im->gdes_c-1].legend[0]='\0';
2788 im->gdes[im->gdes_c-1].format[0]='\0';
2789 im->gdes[im->gdes_c-1].rrd[0]='\0';
2790 im->gdes[im->gdes_c-1].ds=-1;
2791 im->gdes[im->gdes_c-1].p_data=NULL;
2792 im->gdes[im->gdes_c-1].yrule=DNAN;
2793 im->gdes[im->gdes_c-1].xrule=0;
2797 /* copies input untill the first unescaped colon is found
2798 or until input ends. backslashes have to be escaped as well */
2800 scan_for_col(const char *const input, int len, char *const output)
2805 input[inp] != ':' &&
2808 if (input[inp] == '\\' &&
2809 input[inp+1] != '\0' &&
2810 (input[inp+1] == '\\' ||
2811 input[inp+1] == ':')){
2812 output[outp++] = input[++inp];
2815 output[outp++] = input[inp];
2818 output[outp] = '\0';
2821 /* Some surgery done on this function, it became ridiculously big.
2823 ** - initializing now in rrd_graph_init()
2824 ** - options parsing now in rrd_graph_options()
2825 ** - script parsing now in rrd_graph_script()
2828 rrd_graph(int argc, char **argv, char ***prdata, int *xsize, int *ysize, FILE *stream, double *ymin, double *ymax)
2831 rrd_graph_init(&im);
2832 im.graphhandle = stream;
2834 rrd_graph_options(argc,argv,&im);
2835 if (rrd_test_error()) {
2840 if (strlen(argv[optind])>=MAXPATH) {
2841 rrd_set_error("filename (including path) too long");
2845 strncpy(im.graphfile,argv[optind],MAXPATH-1);
2846 im.graphfile[MAXPATH-1]='\0';
2848 rrd_graph_script(argc,argv,&im,1);
2849 if (rrd_test_error()) {
2854 /* Everything is now read and the actual work can start */
2857 if (graph_paint(&im,prdata)==-1){
2862 /* The image is generated and needs to be output.
2863 ** Also, if needed, print a line with information about the image.
2873 /* maybe prdata is not allocated yet ... lets do it now */
2874 if ((*prdata = calloc(2,sizeof(char *)))==NULL) {
2875 rrd_set_error("malloc imginfo");
2879 if(((*prdata)[0] = malloc((strlen(im.imginfo)+200+strlen(im.graphfile))*sizeof(char)))
2881 rrd_set_error("malloc imginfo");
2884 filename=im.graphfile+strlen(im.graphfile);
2885 while(filename > im.graphfile) {
2886 if (*(filename-1)=='/' || *(filename-1)=='\\' ) break;
2890 sprintf((*prdata)[0],im.imginfo,filename,(long)(im.canvas->zoom*im.ximg),(long)(im.canvas->zoom*im.yimg));
2897 rrd_graph_init(image_desc_t *im)
2904 #ifdef HAVE_SETLOCALE
2905 setlocale(LC_TIME,"");
2906 #ifdef HAVE_MBSTOWCS
2907 setlocale(LC_CTYPE,"");
2913 im->xlab_user.minsec = -1;
2919 im->ylegend[0] = '\0';
2920 im->title[0] = '\0';
2921 im->watermark[0] = '\0';
2924 im->unitsexponent= 9999;
2927 im->viewfactor = 1.0;
2934 im->logarithmic = 0;
2935 im->ygridstep = DNAN;
2936 im->draw_x_grid = 1;
2937 im->draw_y_grid = 1;
2942 im->canvas = gfx_new_canvas();
2943 im->grid_dash_on = 1;
2944 im->grid_dash_off = 1;
2945 im->tabwidth = 40.0;
2947 for(i=0;i<DIM(graph_col);i++)
2948 im->graph_col[i]=graph_col[i];
2950 #if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
2953 char rrd_win_default_font[1000];
2954 windir = getenv("windir");
2955 /* %windir% is something like D:\windows or C:\winnt */
2956 if (windir != NULL) {
2957 strncpy(rrd_win_default_font,windir,500);
2958 rrd_win_default_font[500] = '\0';
2959 strcat(rrd_win_default_font,"\\fonts\\");
2960 strcat(rrd_win_default_font,RRD_DEFAULT_FONT);
2961 for(i=0;i<DIM(text_prop);i++){
2962 strncpy(text_prop[i].font,rrd_win_default_font,sizeof(text_prop[i].font)-1);
2963 text_prop[i].font[sizeof(text_prop[i].font)-1] = '\0';
2970 deffont = getenv("RRD_DEFAULT_FONT");
2971 if (deffont != NULL) {
2972 for(i=0;i<DIM(text_prop);i++){
2973 strncpy(text_prop[i].font,deffont,sizeof(text_prop[i].font)-1);
2974 text_prop[i].font[sizeof(text_prop[i].font)-1] = '\0';
2978 for(i=0;i<DIM(text_prop);i++){
2979 im->text_prop[i].size = text_prop[i].size;
2980 strcpy(im->text_prop[i].font,text_prop[i].font);
2985 rrd_graph_options(int argc, char *argv[],image_desc_t *im)
2988 char *parsetime_error = NULL;
2989 char scan_gtm[12],scan_mtm[12],scan_ltm[12],col_nam[12];
2990 time_t start_tmp=0,end_tmp=0;
2992 struct rrd_time_value start_tv, end_tv;
2994 optind = 0; opterr = 0; /* initialize getopt */
2996 parsetime("end-24h", &start_tv);
2997 parsetime("now", &end_tv);
3000 static struct option long_options[] =
3002 {"start", required_argument, 0, 's'},
3003 {"end", required_argument, 0, 'e'},
3004 {"x-grid", required_argument, 0, 'x'},
3005 {"y-grid", required_argument, 0, 'y'},
3006 {"vertical-label",required_argument,0,'v'},
3007 {"width", required_argument, 0, 'w'},
3008 {"height", required_argument, 0, 'h'},
3009 {"interlaced", no_argument, 0, 'i'},
3010 {"upper-limit",required_argument, 0, 'u'},
3011 {"lower-limit",required_argument, 0, 'l'},
3012 {"rigid", no_argument, 0, 'r'},
3013 {"base", required_argument, 0, 'b'},
3014 {"logarithmic",no_argument, 0, 'o'},
3015 {"color", required_argument, 0, 'c'},
3016 {"font", required_argument, 0, 'n'},
3017 {"title", required_argument, 0, 't'},
3018 {"imginfo", required_argument, 0, 'f'},
3019 {"imgformat", required_argument, 0, 'a'},
3020 {"lazy", no_argument, 0, 'z'},
3021 {"zoom", required_argument, 0, 'm'},
3022 {"no-legend", no_argument, 0, 'g'},
3023 {"force-rules-legend",no_argument,0, 'F'},
3024 {"only-graph", no_argument, 0, 'j'},
3025 {"alt-y-grid", no_argument, 0, 'Y'},
3026 {"no-minor", no_argument, 0, 'I'},
3027 {"slope-mode", no_argument, 0, 'E'},
3028 {"alt-autoscale", no_argument, 0, 'A'},
3029 {"alt-autoscale-max", no_argument, 0, 'M'},
3030 {"no-gridfit", no_argument, 0, 'N'},
3031 {"units-exponent",required_argument, 0, 'X'},
3032 {"units-length",required_argument, 0, 'L'},
3033 {"step", required_argument, 0, 'S'},
3034 {"tabwidth", required_argument, 0, 'T'},
3035 {"font-render-mode", required_argument, 0, 'R'},
3036 {"font-smoothing-threshold", required_argument, 0, 'B'},
3037 {"watermark", required_argument, 0, 'W'},
3038 {"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 */
3040 int option_index = 0;
3042 int col_start,col_end;
3044 opt = getopt_long(argc, argv,
3045 "s:e:x:y:v:w:h:iu:l:rb:oc:n:m:t:f:a:I:zgjFYAMEX:L:S:T:NR:B:W:",
3046 long_options, &option_index);
3053 im->extra_flags |= NOMINOR;
3056 im->extra_flags |= ALTYGRID;
3059 im->extra_flags |= ALTAUTOSCALE;
3062 im->extra_flags |= ALTAUTOSCALE_MAX;
3065 im->extra_flags |= ONLY_GRAPH;
3068 im->extra_flags |= NOLEGEND;
3071 im->extra_flags |= FORCE_RULES_LEGEND;
3074 im->unitsexponent = atoi(optarg);
3077 im->unitslength = atoi(optarg);
3080 im->tabwidth = atof(optarg);
3083 im->step = atoi(optarg);
3089 if ((parsetime_error = parsetime(optarg, &start_tv))) {
3090 rrd_set_error( "start time: %s", parsetime_error );
3095 if ((parsetime_error = parsetime(optarg, &end_tv))) {
3096 rrd_set_error( "end time: %s", parsetime_error );
3101 if(strcmp(optarg,"none") == 0){
3107 "%10[A-Z]:%ld:%10[A-Z]:%ld:%10[A-Z]:%ld:%ld:%n",
3109 &im->xlab_user.gridst,
3111 &im->xlab_user.mgridst,
3113 &im->xlab_user.labst,
3114 &im->xlab_user.precis,
3115 &stroff) == 7 && stroff != 0){
3116 strncpy(im->xlab_form, optarg+stroff, sizeof(im->xlab_form) - 1);
3117 im->xlab_form[sizeof(im->xlab_form)-1] = '\0';
3118 if((int)(im->xlab_user.gridtm = tmt_conv(scan_gtm)) == -1){
3119 rrd_set_error("unknown keyword %s",scan_gtm);
3121 } else if ((int)(im->xlab_user.mgridtm = tmt_conv(scan_mtm)) == -1){
3122 rrd_set_error("unknown keyword %s",scan_mtm);
3124 } else if ((int)(im->xlab_user.labtm = tmt_conv(scan_ltm)) == -1){
3125 rrd_set_error("unknown keyword %s",scan_ltm);
3128 im->xlab_user.minsec = 1;
3129 im->xlab_user.stst = im->xlab_form;
3131 rrd_set_error("invalid x-grid format");
3137 if(strcmp(optarg,"none") == 0){
3145 &im->ylabfact) == 2) {
3146 if(im->ygridstep<=0){
3147 rrd_set_error("grid step must be > 0");
3149 } else if (im->ylabfact < 1){
3150 rrd_set_error("label factor must be > 0");
3154 rrd_set_error("invalid y-grid format");
3159 strncpy(im->ylegend,optarg,150);
3160 im->ylegend[150]='\0';
3163 im->maxval = atof(optarg);
3166 im->minval = atof(optarg);
3169 im->base = atol(optarg);
3170 if(im->base != 1024 && im->base != 1000 ){
3171 rrd_set_error("the only sensible value for base apart from 1000 is 1024");
3176 long_tmp = atol(optarg);
3177 if (long_tmp < 10) {
3178 rrd_set_error("width below 10 pixels");
3181 im->xsize = long_tmp;
3184 long_tmp = atol(optarg);
3185 if (long_tmp < 10) {
3186 rrd_set_error("height below 10 pixels");
3189 im->ysize = long_tmp;
3192 im->canvas->interlaced = 1;
3198 im->imginfo = optarg;
3201 if((int)(im->canvas->imgformat = if_conv(optarg)) == -1) {
3202 rrd_set_error("unsupported graphics format '%s'",optarg);
3214 im->logarithmic = 1;
3215 if (isnan(im->minval))
3220 "%10[A-Z]#%n%8lx%n",
3221 col_nam,&col_start,&color,&col_end) == 2){
3223 int col_len = col_end - col_start;
3227 ((color & 0xF00) * 0x110000) |
3228 ((color & 0x0F0) * 0x011000) |
3229 ((color & 0x00F) * 0x001100) |
3235 ((color & 0xF000) * 0x11000) |
3236 ((color & 0x0F00) * 0x01100) |
3237 ((color & 0x00F0) * 0x00110) |
3238 ((color & 0x000F) * 0x00011)
3242 color = (color << 8) + 0xff /* shift left by 8 */;
3247 rrd_set_error("the color format is #RRGGBB[AA]");
3250 if((ci=grc_conv(col_nam)) != -1){
3251 im->graph_col[ci]=color;
3253 rrd_set_error("invalid color name '%s'",col_nam);
3257 rrd_set_error("invalid color def format");
3264 char font[1024] = "";
3267 "%10[A-Z]:%lf:%1000s",
3268 prop,&size,font) >= 2){
3270 if((sindex=text_prop_conv(prop)) != -1){
3271 for (propidx=sindex;propidx<TEXT_PROP_LAST;propidx++){
3273 im->text_prop[propidx].size=size;
3275 if (strlen(font) > 0){
3276 strcpy(im->text_prop[propidx].font,font);
3278 if (propidx==sindex && sindex != 0) break;
3281 rrd_set_error("invalid fonttag '%s'",prop);
3285 rrd_set_error("invalid text property format");
3291 im->canvas->zoom = atof(optarg);
3292 if (im->canvas->zoom <= 0.0) {
3293 rrd_set_error("zoom factor must be > 0");
3298 strncpy(im->title,optarg,150);
3299 im->title[150]='\0';
3303 if ( strcmp( optarg, "normal" ) == 0 )
3304 im->canvas->aa_type = AA_NORMAL;
3305 else if ( strcmp( optarg, "light" ) == 0 )
3306 im->canvas->aa_type = AA_LIGHT;
3307 else if ( strcmp( optarg, "mono" ) == 0 )
3308 im->canvas->aa_type = AA_NONE;
3311 rrd_set_error("unknown font-render-mode '%s'", optarg );
3317 im->canvas->font_aa_threshold = atof(optarg);
3321 strncpy(im->watermark,optarg,100);
3322 im->watermark[99]='\0';
3327 rrd_set_error("unknown option '%c'", optopt);
3329 rrd_set_error("unknown option '%s'",argv[optind-1]);
3334 if (optind >= argc) {
3335 rrd_set_error("missing filename");
3339 if (im->logarithmic == 1 && (im->minval <= 0 || isnan(im->minval))){
3340 rrd_set_error("for a logarithmic yaxis you must specify a lower-limit > 0");
3344 if (proc_start_end(&start_tv,&end_tv,&start_tmp,&end_tmp) == -1){
3345 /* error string is set in parsetime.c */
3349 if (start_tmp < 3600*24*365*10){
3350 rrd_set_error("the first entry to fetch should be after 1980 (%ld)",start_tmp);
3354 if (end_tmp < start_tmp) {
3355 rrd_set_error("start (%ld) should be less than end (%ld)",
3356 start_tmp, end_tmp);
3360 im->start = start_tmp;
3362 im->step = max((long)im->step, (im->end-im->start)/im->xsize);
3366 rrd_graph_check_vname(image_desc_t *im, char *varname, char *err)
3368 if ((im->gdes[im->gdes_c-1].vidx=find_var(im,varname))==-1) {
3369 rrd_set_error("Unknown variable '%s' in %s",varname,err);
3375 rrd_graph_color(image_desc_t *im, char *var, char *err, int optional)
3378 graph_desc_t *gdp=&im->gdes[im->gdes_c-1];
3380 color=strstr(var,"#");
3383 rrd_set_error("Found no color in %s",err);
3392 rest=strstr(color,":");
3400 sscanf(color,"#%6lx%n",&col,&n);
3401 col = (col << 8) + 0xff /* shift left by 8 */;
3402 if (n!=7) rrd_set_error("Color problem in %s",err);
3405 sscanf(color,"#%8lx%n",&col,&n);
3408 rrd_set_error("Color problem in %s",err);
3410 if (rrd_test_error()) return 0;
3417 int bad_format(char *fmt) {
3421 while (*ptr != '\0')
3422 if (*ptr++ == '%') {
3424 /* line cannot end with percent char */
3425 if (*ptr == '\0') return 1;
3427 /* '%s', '%S' and '%%' are allowed */
3428 if (*ptr == 's' || *ptr == 'S' || *ptr == '%') ptr++;
3430 /* %c is allowed (but use only with vdef!) */
3431 else if (*ptr == 'c') {
3436 /* or else '% 6.2lf' and such are allowed */
3438 /* optional padding character */
3439 if (*ptr == ' ' || *ptr == '+' || *ptr == '-') ptr++;
3441 /* This should take care of 'm.n' with all three optional */
3442 while (*ptr >= '0' && *ptr <= '9') ptr++;
3443 if (*ptr == '.') ptr++;
3444 while (*ptr >= '0' && *ptr <= '9') ptr++;
3446 /* Either 'le', 'lf' or 'lg' must follow here */
3447 if (*ptr++ != 'l') return 1;
3448 if (*ptr == 'e' || *ptr == 'f' || *ptr == 'g') ptr++;
3459 vdef_parse(gdes,str)
3460 struct graph_desc_t *gdes;
3461 const char *const str;
3463 /* A VDEF currently is either "func" or "param,func"
3464 * so the parsing is rather simple. Change if needed.
3471 sscanf(str,"%le,%29[A-Z]%n",¶m,func,&n);
3472 if (n== (int)strlen(str)) { /* matched */
3476 sscanf(str,"%29[A-Z]%n",func,&n);
3477 if (n== (int)strlen(str)) { /* matched */
3480 rrd_set_error("Unknown function string '%s' in VDEF '%s'"
3487 if (!strcmp("PERCENT",func)) gdes->vf.op = VDEF_PERCENT;
3488 else if (!strcmp("MAXIMUM",func)) gdes->vf.op = VDEF_MAXIMUM;
3489 else if (!strcmp("AVERAGE",func)) gdes->vf.op = VDEF_AVERAGE;
3490 else if (!strcmp("MINIMUM",func)) gdes->vf.op = VDEF_MINIMUM;
3491 else if (!strcmp("TOTAL", func)) gdes->vf.op = VDEF_TOTAL;
3492 else if (!strcmp("FIRST", func)) gdes->vf.op = VDEF_FIRST;
3493 else if (!strcmp("LAST", func)) gdes->vf.op = VDEF_LAST;
3494 else if (!strcmp("LSLSLOPE", func)) gdes->vf.op = VDEF_LSLSLOPE;
3495 else if (!strcmp("LSLINT", func)) gdes->vf.op = VDEF_LSLINT;
3496 else if (!strcmp("LSLCORREL",func)) gdes->vf.op = VDEF_LSLCORREL;
3498 rrd_set_error("Unknown function '%s' in VDEF '%s'\n"
3505 switch (gdes->vf.op) {
3507 if (isnan(param)) { /* no parameter given */
3508 rrd_set_error("Function '%s' needs parameter in VDEF '%s'\n"
3514 if (param>=0.0 && param<=100.0) {
3515 gdes->vf.param = param;
3516 gdes->vf.val = DNAN; /* undefined */
3517 gdes->vf.when = 0; /* undefined */
3519 rrd_set_error("Parameter '%f' out of range in VDEF '%s'\n"
3534 case VDEF_LSLCORREL:
3536 gdes->vf.param = DNAN;
3537 gdes->vf.val = DNAN;
3540 rrd_set_error("Function '%s' needs no parameter in VDEF '%s'\n"
3557 graph_desc_t *src,*dst;
3561 dst = &im->gdes[gdi];
3562 src = &im->gdes[dst->vidx];
3563 data = src->data + src->ds;
3564 steps = (src->end - src->start) / src->step;
3567 printf("DEBUG: start == %lu, end == %lu, %lu steps\n"
3574 switch (dst->vf.op) {
3575 case VDEF_PERCENT: {
3576 rrd_value_t * array;
3580 if ((array = malloc(steps*sizeof(double)))==NULL) {
3581 rrd_set_error("malloc VDEV_PERCENT");
3584 for (step=0;step < steps; step++) {
3585 array[step]=data[step*src->ds_cnt];
3587 qsort(array,step,sizeof(double),vdef_percent_compar);
3589 field = (steps-1)*dst->vf.param/100;
3590 dst->vf.val = array[field];
3591 dst->vf.when = 0; /* no time component */
3594 for(step=0;step<steps;step++)
3595 printf("DEBUG: %3li:%10.2f %c\n",step,array[step],step==field?'*':' ');
3601 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3602 if (step == steps) {
3606 dst->vf.val = data[step*src->ds_cnt];
3607 dst->vf.when = src->start + (step+1)*src->step;
3609 while (step != steps) {
3610 if (finite(data[step*src->ds_cnt])) {
3611 if (data[step*src->ds_cnt] > dst->vf.val) {
3612 dst->vf.val = data[step*src->ds_cnt];
3613 dst->vf.when = src->start + (step+1)*src->step;
3620 case VDEF_AVERAGE: {
3623 for (step=0;step<steps;step++) {
3624 if (finite(data[step*src->ds_cnt])) {
3625 sum += data[step*src->ds_cnt];
3630 if (dst->vf.op == VDEF_TOTAL) {
3631 dst->vf.val = sum*src->step;
3632 dst->vf.when = cnt*src->step; /* not really "when" */
3634 dst->vf.val = sum/cnt;
3635 dst->vf.when = 0; /* no time component */
3645 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3646 if (step == steps) {
3650 dst->vf.val = data[step*src->ds_cnt];
3651 dst->vf.when = src->start + (step+1)*src->step;
3653 while (step != steps) {
3654 if (finite(data[step*src->ds_cnt])) {
3655 if (data[step*src->ds_cnt] < dst->vf.val) {
3656 dst->vf.val = data[step*src->ds_cnt];
3657 dst->vf.when = src->start + (step+1)*src->step;
3664 /* The time value returned here is one step before the
3665 * actual time value. This is the start of the first
3669 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3670 if (step == steps) { /* all entries were NaN */
3674 dst->vf.val = data[step*src->ds_cnt];
3675 dst->vf.when = src->start + step*src->step;
3679 /* The time value returned here is the
3680 * actual time value. This is the end of the last
3684 while (step >= 0 && isnan(data[step*src->ds_cnt])) step--;
3685 if (step < 0) { /* all entries were NaN */
3689 dst->vf.val = data[step*src->ds_cnt];
3690 dst->vf.when = src->start + (step+1)*src->step;
3695 case VDEF_LSLCORREL:{
3696 /* Bestfit line by linear least squares method */
3699 double SUMx, SUMy, SUMxy, SUMxx, SUMyy, slope, y_intercept, correl ;
3700 SUMx = 0; SUMy = 0; SUMxy = 0; SUMxx = 0; SUMyy = 0;
3702 for (step=0;step<steps;step++) {
3703 if (finite(data[step*src->ds_cnt])) {
3706 SUMxx += step * step;
3707 SUMxy += step * data[step*src->ds_cnt];
3708 SUMy += data[step*src->ds_cnt];
3709 SUMyy += data[step*src->ds_cnt]*data[step*src->ds_cnt];
3713 slope = ( SUMx*SUMy - cnt*SUMxy ) / ( SUMx*SUMx - cnt*SUMxx );
3714 y_intercept = ( SUMy - slope*SUMx ) / cnt;
3715 correl = (SUMxy - (SUMx*SUMy)/cnt) / sqrt((SUMxx - (SUMx*SUMx)/cnt)*(SUMyy - (SUMy*SUMy)/cnt));
3718 if (dst->vf.op == VDEF_LSLSLOPE) {
3719 dst->vf.val = slope;
3720 dst->vf.when = cnt*src->step;
3721 } else if (dst->vf.op == VDEF_LSLINT) {
3722 dst->vf.val = y_intercept;
3723 dst->vf.when = cnt*src->step;
3724 } else if (dst->vf.op == VDEF_LSLCORREL) {
3725 dst->vf.val = correl;
3726 dst->vf.when = cnt*src->step;
3739 /* NaN < -INF < finite_values < INF */
3741 vdef_percent_compar(a,b)
3744 /* Equality is not returned; this doesn't hurt except
3745 * (maybe) for a little performance.
3748 /* First catch NaN values. They are smallest */
3749 if (isnan( *(double *)a )) return -1;
3750 if (isnan( *(double *)b )) return 1;
3752 /* NaN doesn't reach this part so INF and -INF are extremes.
3753 * The sign from isinf() is compatible with the sign we return
3755 if (isinf( *(double *)a )) return isinf( *(double *)a );
3756 if (isinf( *(double *)b )) return isinf( *(double *)b );
3758 /* If we reach this, both values must be finite */
3759 if ( *(double *)a < *(double *)b ) return -1; else return 1;