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];
1616 double X0=im->xorigin;
1617 double X1=im->xorigin+im->xsize;
1619 int sgrid = (int)( im->minval / im->ygrid_scale.gridstep - 1);
1620 int egrid = (int)( im->maxval / im->ygrid_scale.gridstep + 1);
1622 scaledstep = im->ygrid_scale.gridstep/(double)im->magfact*(double)im->viewfactor;
1623 MaxY = scaledstep*(double)egrid;
1624 for (i = sgrid; i <= egrid; i++){
1625 double Y0=ytr(im,im->ygrid_scale.gridstep*i);
1626 double YN=ytr(im,im->ygrid_scale.gridstep*(i+1));
1627 if ( Y0 >= im->yorigin-im->ysize
1628 && Y0 <= im->yorigin){
1629 /* Make sure at least 2 grid labels are shown, even if it doesn't agree
1630 with the chosen settings. Add a label if required by settings, or if
1631 there is only one label so far and the next grid line is out of bounds. */
1632 if(i % im->ygrid_scale.labfact == 0 || ( nlabels==1 && (YN < im->yorigin-im->ysize || YN > im->yorigin) )){
1633 if (im->symbol == ' ') {
1634 if(im->extra_flags & ALTYGRID) {
1635 sprintf(graph_label,im->ygrid_scale.labfmt,scaledstep*(double)i);
1638 sprintf(graph_label,"%4.1f",scaledstep*(double)i);
1640 sprintf(graph_label,"%4.0f",scaledstep*(double)i);
1644 char sisym = ( i == 0 ? ' ' : im->symbol);
1645 if(im->extra_flags & ALTYGRID) {
1646 sprintf(graph_label,im->ygrid_scale.labfmt,scaledstep*(double)i,sisym);
1649 sprintf(graph_label,"%4.1f %c",scaledstep*(double)i, sisym);
1651 sprintf(graph_label,"%4.0f %c",scaledstep*(double)i, sisym);
1657 gfx_new_text ( im->canvas,
1658 X0-im->text_prop[TEXT_PROP_AXIS].size, Y0,
1659 im->graph_col[GRC_FONT],
1660 im->text_prop[TEXT_PROP_AXIS].font,
1661 im->text_prop[TEXT_PROP_AXIS].size,
1662 im->tabwidth, 0.0, GFX_H_RIGHT, GFX_V_CENTER,
1664 gfx_new_dashed_line ( im->canvas,
1667 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1668 im->grid_dash_on, im->grid_dash_off);
1670 } else if (!(im->extra_flags & NOMINOR)) {
1671 gfx_new_dashed_line ( im->canvas,
1674 GRIDWIDTH, im->graph_col[GRC_GRID],
1675 im->grid_dash_on, im->grid_dash_off);
1683 /* logaritmic horizontal grid */
1685 horizontal_log_grid(image_desc_t *im)
1689 int minoridx=0, majoridx=0;
1690 char graph_label[100];
1692 double value, pixperstep, minstep;
1694 /* find grid spaceing */
1695 pixpex= (double)im->ysize / (log10(im->maxval) - log10(im->minval));
1697 if (isnan(pixpex)) {
1701 for(i=0;yloglab[i][0] > 0;i++){
1702 minstep = log10(yloglab[i][0]);
1703 for(ii=1;yloglab[i][ii+1] > 0;ii++){
1704 if(yloglab[i][ii+2]==0){
1705 minstep = log10(yloglab[i][ii+1])-log10(yloglab[i][ii]);
1709 pixperstep = pixpex * minstep;
1710 if(pixperstep > 5){minoridx = i;}
1711 if(pixperstep > 2 * im->text_prop[TEXT_PROP_LEGEND].size){majoridx = i;}
1715 X1=im->xorigin+im->xsize;
1716 /* paint minor grid */
1717 for (value = pow((double)10, log10(im->minval)
1718 - fmod(log10(im->minval),log10(yloglab[minoridx][0])));
1719 value <= im->maxval;
1720 value *= yloglab[minoridx][0]){
1721 if (value < im->minval) continue;
1723 while(yloglab[minoridx][++i] > 0){
1724 Y0 = ytr(im,value * yloglab[minoridx][i]);
1725 if (Y0 <= im->yorigin - im->ysize) break;
1726 gfx_new_dashed_line ( im->canvas,
1729 GRIDWIDTH, im->graph_col[GRC_GRID],
1730 im->grid_dash_on, im->grid_dash_off);
1734 /* paint major grid and labels*/
1735 for (value = pow((double)10, log10(im->minval)
1736 - fmod(log10(im->minval),log10(yloglab[majoridx][0])));
1737 value <= im->maxval;
1738 value *= yloglab[majoridx][0]){
1739 if (value < im->minval) continue;
1741 while(yloglab[majoridx][++i] > 0){
1742 Y0 = ytr(im,value * yloglab[majoridx][i]);
1743 if (Y0 <= im->yorigin - im->ysize) break;
1744 gfx_new_dashed_line ( im->canvas,
1747 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1748 im->grid_dash_on, im->grid_dash_off);
1750 sprintf(graph_label,"%3.0e",value * yloglab[majoridx][i]);
1751 gfx_new_text ( im->canvas,
1752 X0-im->text_prop[TEXT_PROP_AXIS].size, Y0,
1753 im->graph_col[GRC_FONT],
1754 im->text_prop[TEXT_PROP_AXIS].font,
1755 im->text_prop[TEXT_PROP_AXIS].size,
1756 im->tabwidth,0.0, GFX_H_RIGHT, GFX_V_CENTER,
1768 int xlab_sel; /* which sort of label and grid ? */
1769 time_t ti, tilab, timajor;
1771 char graph_label[100];
1772 double X0,Y0,Y1; /* points for filled graph and more*/
1775 /* the type of time grid is determined by finding
1776 the number of seconds per pixel in the graph */
1779 if(im->xlab_user.minsec == -1){
1780 factor=(im->end - im->start)/im->xsize;
1782 while ( xlab[xlab_sel+1].minsec != -1
1783 && xlab[xlab_sel+1].minsec <= factor) { xlab_sel++; } /* pick the last one */
1784 while ( xlab[xlab_sel-1].minsec == xlab[xlab_sel].minsec
1785 && xlab[xlab_sel].length > (im->end - im->start)) { xlab_sel--; } /* go back to the smallest size */
1786 im->xlab_user.gridtm = xlab[xlab_sel].gridtm;
1787 im->xlab_user.gridst = xlab[xlab_sel].gridst;
1788 im->xlab_user.mgridtm = xlab[xlab_sel].mgridtm;
1789 im->xlab_user.mgridst = xlab[xlab_sel].mgridst;
1790 im->xlab_user.labtm = xlab[xlab_sel].labtm;
1791 im->xlab_user.labst = xlab[xlab_sel].labst;
1792 im->xlab_user.precis = xlab[xlab_sel].precis;
1793 im->xlab_user.stst = xlab[xlab_sel].stst;
1796 /* y coords are the same for every line ... */
1798 Y1 = im->yorigin-im->ysize;
1801 /* paint the minor grid */
1802 if (!(im->extra_flags & NOMINOR))
1804 for(ti = find_first_time(im->start,
1805 im->xlab_user.gridtm,
1806 im->xlab_user.gridst),
1807 timajor = find_first_time(im->start,
1808 im->xlab_user.mgridtm,
1809 im->xlab_user.mgridst);
1811 ti = find_next_time(ti,im->xlab_user.gridtm,im->xlab_user.gridst)
1813 /* are we inside the graph ? */
1814 if (ti < im->start || ti > im->end) continue;
1815 while (timajor < ti) {
1816 timajor = find_next_time(timajor,
1817 im->xlab_user.mgridtm, im->xlab_user.mgridst);
1819 if (ti == timajor) continue; /* skip as falls on major grid line */
1821 gfx_new_dashed_line(im->canvas,X0,Y0+1, X0,Y1-1,GRIDWIDTH,
1822 im->graph_col[GRC_GRID],
1823 im->grid_dash_on, im->grid_dash_off);
1828 /* paint the major grid */
1829 for(ti = find_first_time(im->start,
1830 im->xlab_user.mgridtm,
1831 im->xlab_user.mgridst);
1833 ti = find_next_time(ti,im->xlab_user.mgridtm,im->xlab_user.mgridst)
1835 /* are we inside the graph ? */
1836 if (ti < im->start || ti > im->end) continue;
1838 gfx_new_dashed_line(im->canvas,X0,Y0+3, X0,Y1-2,MGRIDWIDTH,
1839 im->graph_col[GRC_MGRID],
1840 im->grid_dash_on, im->grid_dash_off);
1843 /* paint the labels below the graph */
1844 for(ti = find_first_time(im->start - im->xlab_user.precis/2,
1845 im->xlab_user.labtm,
1846 im->xlab_user.labst);
1847 ti <= im->end - im->xlab_user.precis/2;
1848 ti = find_next_time(ti,im->xlab_user.labtm,im->xlab_user.labst)
1850 tilab= ti + im->xlab_user.precis/2; /* correct time for the label */
1851 /* are we inside the graph ? */
1852 if (tilab < im->start || tilab > im->end) continue;
1855 localtime_r(&tilab, &tm);
1856 strftime(graph_label,99,im->xlab_user.stst, &tm);
1858 # error "your libc has no strftime I guess we'll abort the exercise here."
1860 gfx_new_text ( im->canvas,
1861 xtr(im,tilab), Y0+im->text_prop[TEXT_PROP_AXIS].size*1.4+5,
1862 im->graph_col[GRC_FONT],
1863 im->text_prop[TEXT_PROP_AXIS].font,
1864 im->text_prop[TEXT_PROP_AXIS].size,
1865 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_BOTTOM,
1878 /* draw x and y axis */
1879 /* gfx_new_line ( im->canvas, im->xorigin+im->xsize,im->yorigin,
1880 im->xorigin+im->xsize,im->yorigin-im->ysize,
1881 GRIDWIDTH, im->graph_col[GRC_AXIS]);
1883 gfx_new_line ( im->canvas, im->xorigin,im->yorigin-im->ysize,
1884 im->xorigin+im->xsize,im->yorigin-im->ysize,
1885 GRIDWIDTH, im->graph_col[GRC_AXIS]); */
1887 gfx_new_line ( im->canvas, im->xorigin-4,im->yorigin,
1888 im->xorigin+im->xsize+4,im->yorigin,
1889 MGRIDWIDTH, im->graph_col[GRC_AXIS]);
1891 gfx_new_line ( im->canvas, im->xorigin,im->yorigin+4,
1892 im->xorigin,im->yorigin-im->ysize-4,
1893 MGRIDWIDTH, im->graph_col[GRC_AXIS]);
1896 /* arrow for X and Y axis direction */
1897 gfx_new_area ( im->canvas,
1898 im->xorigin+im->xsize+2, im->yorigin-2,
1899 im->xorigin+im->xsize+2, im->yorigin+3,
1900 im->xorigin+im->xsize+7, im->yorigin+0.5, /* LINEOFFSET */
1901 im->graph_col[GRC_ARROW]);
1903 gfx_new_area ( im->canvas,
1904 im->xorigin-2, im->yorigin-im->ysize-2,
1905 im->xorigin+3, im->yorigin-im->ysize-2,
1906 im->xorigin+0.5, im->yorigin-im->ysize-7, /* LINEOFFSET */
1907 im->graph_col[GRC_ARROW]);
1912 grid_paint(image_desc_t *im)
1916 double X0,Y0; /* points for filled graph and more*/
1919 /* draw 3d border */
1920 node = gfx_new_area (im->canvas, 0,im->yimg,
1922 2,2,im->graph_col[GRC_SHADEA]);
1923 gfx_add_point( node , im->ximg - 2, 2 );
1924 gfx_add_point( node , im->ximg, 0 );
1925 gfx_add_point( node , 0,0 );
1926 /* gfx_add_point( node , 0,im->yimg ); */
1928 node = gfx_new_area (im->canvas, 2,im->yimg-2,
1929 im->ximg-2,im->yimg-2,
1931 im->graph_col[GRC_SHADEB]);
1932 gfx_add_point( node , im->ximg,0);
1933 gfx_add_point( node , im->ximg,im->yimg);
1934 gfx_add_point( node , 0,im->yimg);
1935 /* gfx_add_point( node , 0,im->yimg ); */
1938 if (im->draw_x_grid == 1 )
1941 if (im->draw_y_grid == 1){
1942 if(im->logarithmic){
1943 res = horizontal_log_grid(im);
1945 res = draw_horizontal_grid(im);
1948 /* dont draw horizontal grid if there is no min and max val */
1950 char *nodata = "No Data found";
1951 gfx_new_text(im->canvas,im->ximg/2, (2*im->yorigin-im->ysize) / 2,
1952 im->graph_col[GRC_FONT],
1953 im->text_prop[TEXT_PROP_AXIS].font,
1954 im->text_prop[TEXT_PROP_AXIS].size,
1955 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_CENTER,
1960 /* yaxis unit description */
1961 gfx_new_text( im->canvas,
1962 10, (im->yorigin - im->ysize/2),
1963 im->graph_col[GRC_FONT],
1964 im->text_prop[TEXT_PROP_UNIT].font,
1965 im->text_prop[TEXT_PROP_UNIT].size, im->tabwidth,
1966 RRDGRAPH_YLEGEND_ANGLE,
1967 GFX_H_LEFT, GFX_V_CENTER,
1971 gfx_new_text( im->canvas,
1972 im->ximg/2, im->text_prop[TEXT_PROP_TITLE].size*1.3+4,
1973 im->graph_col[GRC_FONT],
1974 im->text_prop[TEXT_PROP_TITLE].font,
1975 im->text_prop[TEXT_PROP_TITLE].size, im->tabwidth, 0.0,
1976 GFX_H_CENTER, GFX_V_CENTER,
1978 /* rrdtool 'logo' */
1979 gfx_new_text( im->canvas,
1981 ( im->graph_col[GRC_FONT] & 0xffffff00 ) | 0x00000044,
1982 im->text_prop[TEXT_PROP_AXIS].font,
1983 5.5, im->tabwidth, 270,
1984 GFX_H_RIGHT, GFX_V_TOP,
1985 "RRDTOOL / TOBI OETIKER");
1987 /* graph watermark */
1988 if(im->watermark[0] != '\0') {
1989 gfx_new_text( im->canvas,
1990 im->ximg/2, im->yimg-6,
1991 ( im->graph_col[GRC_FONT] & 0xffffff00 ) | 0x00000044,
1992 im->text_prop[TEXT_PROP_AXIS].font,
1993 5.5, im->tabwidth, 0,
1994 GFX_H_CENTER, GFX_V_BOTTOM,
1999 if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
2000 for(i=0;i<im->gdes_c;i++){
2001 if(im->gdes[i].legend[0] =='\0')
2004 /* im->gdes[i].leg_y is the bottom of the legend */
2005 X0 = im->gdes[i].leg_x;
2006 Y0 = im->gdes[i].leg_y;
2007 gfx_new_text ( im->canvas, X0, Y0,
2008 im->graph_col[GRC_FONT],
2009 im->text_prop[TEXT_PROP_LEGEND].font,
2010 im->text_prop[TEXT_PROP_LEGEND].size,
2011 im->tabwidth,0.0, GFX_H_LEFT, GFX_V_BOTTOM,
2012 im->gdes[i].legend );
2013 /* The legend for GRAPH items starts with "M " to have
2014 enough space for the box */
2015 if ( im->gdes[i].gf != GF_PRINT &&
2016 im->gdes[i].gf != GF_GPRINT &&
2017 im->gdes[i].gf != GF_COMMENT) {
2020 boxH = gfx_get_text_width(im->canvas, 0,
2021 im->text_prop[TEXT_PROP_LEGEND].font,
2022 im->text_prop[TEXT_PROP_LEGEND].size,
2023 im->tabwidth,"o", 0) * 1.2;
2026 /* make sure transparent colors show up the same way as in the graph */
2027 node = gfx_new_area(im->canvas,
2031 im->graph_col[GRC_BACK]);
2032 gfx_add_point ( node, X0+boxH, Y0-boxV );
2034 node = gfx_new_area(im->canvas,
2039 gfx_add_point ( node, X0+boxH, Y0-boxV );
2040 node = gfx_new_line(im->canvas,
2043 1.0,im->graph_col[GRC_FRAME]);
2044 gfx_add_point(node,X0+boxH,Y0);
2045 gfx_add_point(node,X0+boxH,Y0-boxV);
2046 gfx_close_path(node);
2053 /*****************************************************
2054 * lazy check make sure we rely need to create this graph
2055 *****************************************************/
2057 int lazy_check(image_desc_t *im){
2060 struct stat imgstat;
2062 if (im->lazy == 0) return 0; /* no lazy option */
2063 if (stat(im->graphfile,&imgstat) != 0)
2064 return 0; /* can't stat */
2065 /* one pixel in the existing graph is more then what we would
2067 if (time(NULL) - imgstat.st_mtime >
2068 (im->end - im->start) / im->xsize)
2070 if ((fd = fopen(im->graphfile,"rb")) == NULL)
2071 return 0; /* the file does not exist */
2072 switch (im->canvas->imgformat) {
2074 size = PngSize(fd,&(im->ximg),&(im->yimg));
2083 #ifdef WITH_PIECHART
2085 pie_part(image_desc_t *im, gfx_color_t color,
2086 double PieCenterX, double PieCenterY, double Radius,
2087 double startangle, double endangle)
2091 double step=M_PI/50; /* Number of iterations for the circle;
2092 ** 10 is definitely too low, more than
2093 ** 50 seems to be overkill
2096 /* Strange but true: we have to work clockwise or else
2097 ** anti aliasing nor transparency don't work.
2099 ** This test is here to make sure we do it right, also
2100 ** this makes the for...next loop more easy to implement.
2101 ** The return will occur if the user enters a negative number
2102 ** (which shouldn't be done according to the specs) or if the
2103 ** programmers do something wrong (which, as we all know, never
2104 ** happens anyway :)
2106 if (endangle<startangle) return;
2108 /* Hidden feature: Radius decreases each full circle */
2110 while (angle>=2*M_PI) {
2115 node=gfx_new_area(im->canvas,
2116 PieCenterX+sin(startangle)*Radius,
2117 PieCenterY-cos(startangle)*Radius,
2120 PieCenterX+sin(endangle)*Radius,
2121 PieCenterY-cos(endangle)*Radius,
2123 for (angle=endangle;angle-startangle>=step;angle-=step) {
2125 PieCenterX+sin(angle)*Radius,
2126 PieCenterY-cos(angle)*Radius );
2133 graph_size_location(image_desc_t *im, int elements
2135 #ifdef WITH_PIECHART
2141 /* The actual size of the image to draw is determined from
2142 ** several sources. The size given on the command line is
2143 ** the graph area but we need more as we have to draw labels
2144 ** and other things outside the graph area
2147 /* +-+-------------------------------------------+
2148 ** |l|.................title.....................|
2149 ** |e+--+-------------------------------+--------+
2152 ** |l| l| main graph area | chart |
2155 ** |r+--+-------------------------------+--------+
2156 ** |e| | x-axis labels | |
2157 ** |v+--+-------------------------------+--------+
2158 ** | |..............legends......................|
2159 ** +-+-------------------------------------------+
2161 ** +---------------------------------------------+
2167 #ifdef WITH_PIECHART
2172 Xlegend =0, Ylegend =0,
2174 Xspacing =15, Yspacing =15,
2178 if (im->extra_flags & ONLY_GRAPH) {
2180 im->ximg = im->xsize;
2181 im->yimg = im->ysize;
2182 im->yorigin = im->ysize;
2187 if (im->ylegend[0] != '\0' ) {
2188 Xvertical = im->text_prop[TEXT_PROP_UNIT].size *2;
2192 if (im->title[0] != '\0') {
2193 /* The title is placed "inbetween" two text lines so it
2194 ** automatically has some vertical spacing. The horizontal
2195 ** spacing is added here, on each side.
2197 /* don't care for the with of the title
2198 Xtitle = gfx_get_text_width(im->canvas, 0,
2199 im->text_prop[TEXT_PROP_TITLE].font,
2200 im->text_prop[TEXT_PROP_TITLE].size,
2202 im->title, 0) + 2*Xspacing; */
2203 Ytitle = im->text_prop[TEXT_PROP_TITLE].size*2.6+10;
2209 if (im->draw_x_grid) {
2210 Yxlabel=im->text_prop[TEXT_PROP_AXIS].size *2.5;
2212 if (im->draw_y_grid) {
2213 Xylabel=gfx_get_text_width(im->canvas, 0,
2214 im->text_prop[TEXT_PROP_AXIS].font,
2215 im->text_prop[TEXT_PROP_AXIS].size,
2217 "0", 0) * im->unitslength;
2221 #ifdef WITH_PIECHART
2223 im->piesize=im->xsize<im->ysize?im->xsize:im->ysize;
2229 /* Now calculate the total size. Insert some spacing where
2230 desired. im->xorigin and im->yorigin need to correspond
2231 with the lower left corner of the main graph area or, if
2232 this one is not set, the imaginary box surrounding the
2235 /* The legend width cannot yet be determined, as a result we
2236 ** have problems adjusting the image to it. For now, we just
2237 ** forget about it at all; the legend will have to fit in the
2238 ** size already allocated.
2240 im->ximg = Xylabel + Xmain + 2 * Xspacing;
2242 #ifdef WITH_PIECHART
2246 if (Xmain) im->ximg += Xspacing;
2247 #ifdef WITH_PIECHART
2248 if (Xpie) im->ximg += Xspacing;
2251 im->xorigin = Xspacing + Xylabel;
2253 /* the length of the title should not influence with width of the graph
2254 if (Xtitle > im->ximg) im->ximg = Xtitle; */
2256 if (Xvertical) { /* unit description */
2257 im->ximg += Xvertical;
2258 im->xorigin += Xvertical;
2262 /* The vertical size is interesting... we need to compare
2263 ** the sum of {Ytitle, Ymain, Yxlabel, Ylegend, Ywatermark} with
2264 ** Yvertical however we need to know {Ytitle+Ymain+Yxlabel}
2265 ** in order to start even thinking about Ylegend or Ywatermark.
2267 ** Do it in three portions: First calculate the inner part,
2268 ** then do the legend, then adjust the total height of the img,
2269 ** adding space for a watermark if one exists;
2272 /* reserve space for main and/or pie */
2274 im->yimg = Ymain + Yxlabel;
2276 #ifdef WITH_PIECHART
2277 if (im->yimg < Ypie) im->yimg = Ypie;
2280 im->yorigin = im->yimg - Yxlabel;
2282 /* reserve space for the title *or* some padding above the graph */
2285 im->yorigin += Ytitle;
2287 im->yimg += 1.5*Yspacing;
2288 im->yorigin += 1.5*Yspacing;
2290 /* reserve space for padding below the graph */
2291 im->yimg += Yspacing;
2293 /* Determine where to place the legends onto the image.
2294 ** Adjust im->yimg to match the space requirements.
2296 if(leg_place(im)==-1)
2299 if (im->watermark[0] != '\0') {
2300 im->yimg += Ywatermark;
2304 if (Xlegend > im->ximg) {
2306 /* reposition Pie */
2310 #ifdef WITH_PIECHART
2311 /* The pie is placed in the upper right hand corner,
2312 ** just below the title (if any) and with sufficient
2316 im->pie_x = im->ximg - Xspacing - Xpie/2;
2317 im->pie_y = im->yorigin-Ymain+Ypie/2;
2319 im->pie_x = im->ximg/2;
2320 im->pie_y = im->yorigin-Ypie/2;
2328 /* from http://www.cygnus-software.com/papers/comparingfloats/comparingfloats.htm */
2329 /* yes we are loosing precision by doing tos with floats instead of doubles
2330 but it seems more stable this way. */
2332 static int AlmostEqual2sComplement (float A, float B, int maxUlps)
2335 int aInt = *(int*)&A;
2336 int bInt = *(int*)&B;
2338 /* Make sure maxUlps is non-negative and small enough that the
2339 default NAN won't compare as equal to anything. */
2341 /* assert(maxUlps > 0 && maxUlps < 4 * 1024 * 1024); */
2343 /* Make aInt lexicographically ordered as a twos-complement int */
2346 aInt = 0x80000000l - aInt;
2348 /* Make bInt lexicographically ordered as a twos-complement int */
2351 bInt = 0x80000000l - bInt;
2353 intDiff = abs(aInt - bInt);
2355 if (intDiff <= maxUlps)
2361 /* draw that picture thing ... */
2363 graph_paint(image_desc_t *im, char ***calcpr)
2366 int lazy = lazy_check(im);
2367 #ifdef WITH_PIECHART
2369 double PieStart=0.0;
2374 double areazero = 0.0;
2375 graph_desc_t *lastgdes = NULL;
2377 /* if we are lazy and there is nothing to PRINT ... quit now */
2378 if (lazy && im->prt_c==0) return 0;
2380 /* pull the data from the rrd files ... */
2382 if(data_fetch(im)==-1)
2385 /* evaluate VDEF and CDEF operations ... */
2386 if(data_calc(im)==-1)
2389 #ifdef WITH_PIECHART
2390 /* check if we need to draw a piechart */
2391 for(i=0;i<im->gdes_c;i++){
2392 if (im->gdes[i].gf == GF_PART) {
2399 /* calculate and PRINT and GPRINT definitions. We have to do it at
2400 * this point because it will affect the length of the legends
2401 * if there are no graph elements we stop here ...
2402 * if we are lazy, try to quit ...
2404 i=print_calc(im,calcpr);
2407 #ifdef WITH_PIECHART
2410 ) || lazy) return 0;
2412 #ifdef WITH_PIECHART
2413 /* If there's only the pie chart to draw, signal this */
2414 if (i==0) piechart=2;
2417 /* get actual drawing data and find min and max values*/
2418 if(data_proc(im)==-1)
2421 if(!im->logarithmic){si_unit(im);} /* identify si magnitude Kilo, Mega Giga ? */
2423 if(!im->rigid && ! im->logarithmic)
2424 expand_range(im); /* make sure the upper and lower limit are
2427 if (!calc_horizontal_grid(im))
2434 /**************************************************************
2435 *** Calculating sizes and locations became a bit confusing ***
2436 *** so I moved this into a separate function. ***
2437 **************************************************************/
2438 if(graph_size_location(im,i
2439 #ifdef WITH_PIECHART
2445 /* the actual graph is created by going through the individual
2446 graph elements and then drawing them */
2448 node=gfx_new_area ( im->canvas,
2452 im->graph_col[GRC_BACK]);
2454 gfx_add_point(node,im->ximg, 0);
2456 #ifdef WITH_PIECHART
2457 if (piechart != 2) {
2459 node=gfx_new_area ( im->canvas,
2460 im->xorigin, im->yorigin,
2461 im->xorigin + im->xsize, im->yorigin,
2462 im->xorigin + im->xsize, im->yorigin-im->ysize,
2463 im->graph_col[GRC_CANVAS]);
2465 gfx_add_point(node,im->xorigin, im->yorigin - im->ysize);
2467 if (im->minval > 0.0)
2468 areazero = im->minval;
2469 if (im->maxval < 0.0)
2470 areazero = im->maxval;
2471 #ifdef WITH_PIECHART
2475 #ifdef WITH_PIECHART
2477 pie_part(im,im->graph_col[GRC_CANVAS],im->pie_x,im->pie_y,im->piesize*0.5,0,2*M_PI);
2481 for(i=0;i<im->gdes_c;i++){
2482 switch(im->gdes[i].gf){
2495 for (ii = 0; ii < im->xsize; ii++)
2497 if (!isnan(im->gdes[i].p_data[ii]) &&
2498 im->gdes[i].p_data[ii] != 0.0)
2500 if (im -> gdes[i].yrule > 0 ) {
2501 gfx_new_line(im->canvas,
2502 im -> xorigin + ii, im->yorigin,
2503 im -> xorigin + ii, im->yorigin - im -> gdes[i].yrule * im -> ysize,
2505 im -> gdes[i].col );
2506 } else if ( im -> gdes[i].yrule < 0 ) {
2507 gfx_new_line(im->canvas,
2508 im -> xorigin + ii, im->yorigin - im -> ysize,
2509 im -> xorigin + ii, im->yorigin - ( 1 - im -> gdes[i].yrule ) * im -> ysize,
2511 im -> gdes[i].col );
2519 /* fix data points at oo and -oo */
2520 for(ii=0;ii<im->xsize;ii++){
2521 if (isinf(im->gdes[i].p_data[ii])){
2522 if (im->gdes[i].p_data[ii] > 0) {
2523 im->gdes[i].p_data[ii] = im->maxval ;
2525 im->gdes[i].p_data[ii] = im->minval ;
2531 /* *******************************************************
2536 -------|--t-1--t--------------------------------
2538 if we know the value at time t was a then
2539 we draw a square from t-1 to t with the value a.
2541 ********************************************************* */
2542 if (im->gdes[i].col != 0x0){
2543 /* GF_LINE and friend */
2544 if(im->gdes[i].gf == GF_LINE ){
2547 for(ii=1;ii<im->xsize;ii++){
2548 if (isnan(im->gdes[i].p_data[ii]) || (im->slopemode==1 && isnan(im->gdes[i].p_data[ii-1]))){
2552 if ( node == NULL ) {
2553 last_y = ytr(im,im->gdes[i].p_data[ii]);
2554 if ( im->slopemode == 0 ){
2555 node = gfx_new_line(im->canvas,
2556 ii-1+im->xorigin,last_y,
2557 ii+im->xorigin,last_y,
2558 im->gdes[i].linewidth,
2561 node = gfx_new_line(im->canvas,
2562 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii-1]),
2563 ii+im->xorigin,last_y,
2564 im->gdes[i].linewidth,
2568 double new_y = ytr(im,im->gdes[i].p_data[ii]);
2569 if ( im->slopemode==0 && ! AlmostEqual2sComplement(new_y,last_y,4)){
2570 gfx_add_point(node,ii-1+im->xorigin,new_y);
2573 gfx_add_point(node,ii+im->xorigin,new_y);
2579 double *foreY=malloc(sizeof(double)*im->xsize*2);
2580 double *foreX=malloc(sizeof(double)*im->xsize*2);
2581 double *backY=malloc(sizeof(double)*im->xsize*2);
2582 double *backX=malloc(sizeof(double)*im->xsize*2);
2584 for(ii=0;ii<=im->xsize;ii++){
2586 if ( idxI > 0 && ( drawem != 0 || ii==im->xsize)){
2589 while (cntI < idxI && AlmostEqual2sComplement(foreY[lastI],foreY[cntI],4) && AlmostEqual2sComplement(foreY[lastI],foreY[cntI+1],4)){cntI++;}
2590 node = gfx_new_area(im->canvas,
2593 foreX[cntI],foreY[cntI], im->gdes[i].col);
2594 while (cntI < idxI) {
2597 while ( cntI < idxI && AlmostEqual2sComplement(foreY[lastI],foreY[cntI],4) && AlmostEqual2sComplement(foreY[lastI],foreY[cntI+1],4)){cntI++;}
2598 gfx_add_point(node,foreX[cntI],foreY[cntI]);
2600 gfx_add_point(node,backX[idxI],backY[idxI]);
2604 while ( idxI > 1 && AlmostEqual2sComplement(backY[lastI], backY[idxI],4) && AlmostEqual2sComplement(backY[lastI],backY[idxI-1],4)){idxI--;}
2605 gfx_add_point(node,backX[idxI],backY[idxI]);
2614 if (ii == im->xsize) break;
2616 /* keep things simple for now, just draw these bars
2617 do not try to build a big and complex area */
2620 if ( im->slopemode == 0 && ii==0){
2623 if ( isnan(im->gdes[i].p_data[ii]) ) {
2627 ytop = ytr(im,im->gdes[i].p_data[ii]);
2628 if ( lastgdes && im->gdes[i].stack ) {
2629 ybase = ytr(im,lastgdes->p_data[ii]);
2631 ybase = ytr(im,areazero);
2633 if ( ybase == ytop ){
2637 /* every area has to be wound clock-wise,
2638 so we have to make sur base remains base */
2640 double extra = ytop;
2644 if ( im->slopemode == 0 ){
2645 backY[++idxI] = ybase-0.2;
2646 backX[idxI] = ii+im->xorigin-1;
2647 foreY[idxI] = ytop+0.2;
2648 foreX[idxI] = ii+im->xorigin-1;
2650 backY[++idxI] = ybase-0.2;
2651 backX[idxI] = ii+im->xorigin;
2652 foreY[idxI] = ytop+0.2;
2653 foreX[idxI] = ii+im->xorigin;
2655 /* close up any remaining area */
2660 } /* else GF_LINE */
2661 } /* if color != 0x0 */
2662 /* make sure we do not run into trouble when stacking on NaN */
2663 for(ii=0;ii<im->xsize;ii++){
2664 if (isnan(im->gdes[i].p_data[ii])) {
2665 if (lastgdes && (im->gdes[i].stack)) {
2666 im->gdes[i].p_data[ii] = lastgdes->p_data[ii];
2668 im->gdes[i].p_data[ii] = areazero;
2672 lastgdes = &(im->gdes[i]);
2674 #ifdef WITH_PIECHART
2676 if(isnan(im->gdes[i].yrule)) /* fetch variable */
2677 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2679 if (finite(im->gdes[i].yrule)) { /* even the fetched var can be NaN */
2680 pie_part(im,im->gdes[i].col,
2681 im->pie_x,im->pie_y,im->piesize*0.4,
2682 M_PI*2.0*PieStart/100.0,
2683 M_PI*2.0*(PieStart+im->gdes[i].yrule)/100.0);
2684 PieStart += im->gdes[i].yrule;
2689 rrd_set_error("STACK should already be turned into LINE or AREA here");
2695 #ifdef WITH_PIECHART
2703 /* grid_paint also does the text */
2704 if( !(im->extra_flags & ONLY_GRAPH) )
2708 if( !(im->extra_flags & ONLY_GRAPH) )
2711 /* the RULES are the last thing to paint ... */
2712 for(i=0;i<im->gdes_c;i++){
2714 switch(im->gdes[i].gf){
2716 if(isnan(im->gdes[i].yrule)) { /* fetch variable */
2717 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2719 if(im->gdes[i].yrule >= im->minval
2720 && im->gdes[i].yrule <= im->maxval)
2721 gfx_new_line(im->canvas,
2722 im->xorigin,ytr(im,im->gdes[i].yrule),
2723 im->xorigin+im->xsize,ytr(im,im->gdes[i].yrule),
2724 1.0,im->gdes[i].col);
2727 if(im->gdes[i].xrule == 0) { /* fetch variable */
2728 im->gdes[i].xrule = im->gdes[im->gdes[i].vidx].vf.when;
2730 if(im->gdes[i].xrule >= im->start
2731 && im->gdes[i].xrule <= im->end)
2732 gfx_new_line(im->canvas,
2733 xtr(im,im->gdes[i].xrule),im->yorigin,
2734 xtr(im,im->gdes[i].xrule),im->yorigin-im->ysize,
2735 1.0,im->gdes[i].col);
2743 if (strcmp(im->graphfile,"-")==0) {
2744 fo = im->graphhandle ? im->graphhandle : stdout;
2745 #if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
2746 /* Change translation mode for stdout to BINARY */
2747 _setmode( _fileno( fo ), O_BINARY );
2750 if ((fo = fopen(im->graphfile,"wb")) == NULL) {
2751 rrd_set_error("Opening '%s' for write: %s",im->graphfile,
2752 rrd_strerror(errno));
2756 gfx_render (im->canvas,im->ximg,im->yimg,0x00000000,fo);
2757 if (strcmp(im->graphfile,"-") != 0)
2763 /*****************************************************
2765 *****************************************************/
2768 gdes_alloc(image_desc_t *im){
2771 if ((im->gdes = (graph_desc_t *) rrd_realloc(im->gdes, (im->gdes_c)
2772 * sizeof(graph_desc_t)))==NULL){
2773 rrd_set_error("realloc graph_descs");
2778 im->gdes[im->gdes_c-1].step=im->step;
2779 im->gdes[im->gdes_c-1].step_orig=im->step;
2780 im->gdes[im->gdes_c-1].stack=0;
2781 im->gdes[im->gdes_c-1].linewidth=0;
2782 im->gdes[im->gdes_c-1].debug=0;
2783 im->gdes[im->gdes_c-1].start=im->start;
2784 im->gdes[im->gdes_c-1].end=im->end;
2785 im->gdes[im->gdes_c-1].vname[0]='\0';
2786 im->gdes[im->gdes_c-1].data=NULL;
2787 im->gdes[im->gdes_c-1].ds_namv=NULL;
2788 im->gdes[im->gdes_c-1].data_first=0;
2789 im->gdes[im->gdes_c-1].p_data=NULL;
2790 im->gdes[im->gdes_c-1].rpnp=NULL;
2791 im->gdes[im->gdes_c-1].shift=0;
2792 im->gdes[im->gdes_c-1].col = 0x0;
2793 im->gdes[im->gdes_c-1].legend[0]='\0';
2794 im->gdes[im->gdes_c-1].format[0]='\0';
2795 im->gdes[im->gdes_c-1].rrd[0]='\0';
2796 im->gdes[im->gdes_c-1].ds=-1;
2797 im->gdes[im->gdes_c-1].p_data=NULL;
2798 im->gdes[im->gdes_c-1].yrule=DNAN;
2799 im->gdes[im->gdes_c-1].xrule=0;
2803 /* copies input untill the first unescaped colon is found
2804 or until input ends. backslashes have to be escaped as well */
2806 scan_for_col(const char *const input, int len, char *const output)
2811 input[inp] != ':' &&
2814 if (input[inp] == '\\' &&
2815 input[inp+1] != '\0' &&
2816 (input[inp+1] == '\\' ||
2817 input[inp+1] == ':')){
2818 output[outp++] = input[++inp];
2821 output[outp++] = input[inp];
2824 output[outp] = '\0';
2827 /* Some surgery done on this function, it became ridiculously big.
2829 ** - initializing now in rrd_graph_init()
2830 ** - options parsing now in rrd_graph_options()
2831 ** - script parsing now in rrd_graph_script()
2834 rrd_graph(int argc, char **argv, char ***prdata, int *xsize, int *ysize, FILE *stream, double *ymin, double *ymax)
2837 rrd_graph_init(&im);
2838 im.graphhandle = stream;
2840 rrd_graph_options(argc,argv,&im);
2841 if (rrd_test_error()) {
2846 if (strlen(argv[optind])>=MAXPATH) {
2847 rrd_set_error("filename (including path) too long");
2851 strncpy(im.graphfile,argv[optind],MAXPATH-1);
2852 im.graphfile[MAXPATH-1]='\0';
2854 rrd_graph_script(argc,argv,&im,1);
2855 if (rrd_test_error()) {
2860 /* Everything is now read and the actual work can start */
2863 if (graph_paint(&im,prdata)==-1){
2868 /* The image is generated and needs to be output.
2869 ** Also, if needed, print a line with information about the image.
2879 /* maybe prdata is not allocated yet ... lets do it now */
2880 if ((*prdata = calloc(2,sizeof(char *)))==NULL) {
2881 rrd_set_error("malloc imginfo");
2885 if(((*prdata)[0] = malloc((strlen(im.imginfo)+200+strlen(im.graphfile))*sizeof(char)))
2887 rrd_set_error("malloc imginfo");
2890 filename=im.graphfile+strlen(im.graphfile);
2891 while(filename > im.graphfile) {
2892 if (*(filename-1)=='/' || *(filename-1)=='\\' ) break;
2896 sprintf((*prdata)[0],im.imginfo,filename,(long)(im.canvas->zoom*im.ximg),(long)(im.canvas->zoom*im.yimg));
2903 rrd_graph_init(image_desc_t *im)
2910 #ifdef HAVE_SETLOCALE
2911 setlocale(LC_TIME,"");
2912 #ifdef HAVE_MBSTOWCS
2913 setlocale(LC_CTYPE,"");
2919 im->xlab_user.minsec = -1;
2925 im->ylegend[0] = '\0';
2926 im->title[0] = '\0';
2927 im->watermark[0] = '\0';
2930 im->unitsexponent= 9999;
2933 im->viewfactor = 1.0;
2940 im->logarithmic = 0;
2941 im->ygridstep = DNAN;
2942 im->draw_x_grid = 1;
2943 im->draw_y_grid = 1;
2948 im->canvas = gfx_new_canvas();
2949 im->grid_dash_on = 1;
2950 im->grid_dash_off = 1;
2951 im->tabwidth = 40.0;
2953 for(i=0;i<DIM(graph_col);i++)
2954 im->graph_col[i]=graph_col[i];
2956 #if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
2959 char rrd_win_default_font[1000];
2960 windir = getenv("windir");
2961 /* %windir% is something like D:\windows or C:\winnt */
2962 if (windir != NULL) {
2963 strncpy(rrd_win_default_font,windir,500);
2964 rrd_win_default_font[500] = '\0';
2965 strcat(rrd_win_default_font,"\\fonts\\");
2966 strcat(rrd_win_default_font,RRD_DEFAULT_FONT);
2967 for(i=0;i<DIM(text_prop);i++){
2968 strncpy(text_prop[i].font,rrd_win_default_font,sizeof(text_prop[i].font)-1);
2969 text_prop[i].font[sizeof(text_prop[i].font)-1] = '\0';
2976 deffont = getenv("RRD_DEFAULT_FONT");
2977 if (deffont != NULL) {
2978 for(i=0;i<DIM(text_prop);i++){
2979 strncpy(text_prop[i].font,deffont,sizeof(text_prop[i].font)-1);
2980 text_prop[i].font[sizeof(text_prop[i].font)-1] = '\0';
2984 for(i=0;i<DIM(text_prop);i++){
2985 im->text_prop[i].size = text_prop[i].size;
2986 strcpy(im->text_prop[i].font,text_prop[i].font);
2991 rrd_graph_options(int argc, char *argv[],image_desc_t *im)
2994 char *parsetime_error = NULL;
2995 char scan_gtm[12],scan_mtm[12],scan_ltm[12],col_nam[12];
2996 time_t start_tmp=0,end_tmp=0;
2998 struct rrd_time_value start_tv, end_tv;
3000 optind = 0; opterr = 0; /* initialize getopt */
3002 parsetime("end-24h", &start_tv);
3003 parsetime("now", &end_tv);
3006 static struct option long_options[] =
3008 {"start", required_argument, 0, 's'},
3009 {"end", required_argument, 0, 'e'},
3010 {"x-grid", required_argument, 0, 'x'},
3011 {"y-grid", required_argument, 0, 'y'},
3012 {"vertical-label",required_argument,0,'v'},
3013 {"width", required_argument, 0, 'w'},
3014 {"height", required_argument, 0, 'h'},
3015 {"interlaced", no_argument, 0, 'i'},
3016 {"upper-limit",required_argument, 0, 'u'},
3017 {"lower-limit",required_argument, 0, 'l'},
3018 {"rigid", no_argument, 0, 'r'},
3019 {"base", required_argument, 0, 'b'},
3020 {"logarithmic",no_argument, 0, 'o'},
3021 {"color", required_argument, 0, 'c'},
3022 {"font", required_argument, 0, 'n'},
3023 {"title", required_argument, 0, 't'},
3024 {"imginfo", required_argument, 0, 'f'},
3025 {"imgformat", required_argument, 0, 'a'},
3026 {"lazy", no_argument, 0, 'z'},
3027 {"zoom", required_argument, 0, 'm'},
3028 {"no-legend", no_argument, 0, 'g'},
3029 {"force-rules-legend",no_argument,0, 'F'},
3030 {"only-graph", no_argument, 0, 'j'},
3031 {"alt-y-grid", no_argument, 0, 'Y'},
3032 {"no-minor", no_argument, 0, 'I'},
3033 {"slope-mode", no_argument, 0, 'E'},
3034 {"alt-autoscale", no_argument, 0, 'A'},
3035 {"alt-autoscale-max", no_argument, 0, 'M'},
3036 {"no-gridfit", no_argument, 0, 'N'},
3037 {"units-exponent",required_argument, 0, 'X'},
3038 {"units-length",required_argument, 0, 'L'},
3039 {"step", required_argument, 0, 'S'},
3040 {"tabwidth", required_argument, 0, 'T'},
3041 {"font-render-mode", required_argument, 0, 'R'},
3042 {"font-smoothing-threshold", required_argument, 0, 'B'},
3043 {"watermark", required_argument, 0, 'W'},
3044 {"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 */
3046 int option_index = 0;
3048 int col_start,col_end;
3050 opt = getopt_long(argc, argv,
3051 "s:e:x:y:v:w:h:iu:l:rb:oc:n:m:t:f:a:I:zgjFYAMEX:L:S:T:NR:B:W:",
3052 long_options, &option_index);
3059 im->extra_flags |= NOMINOR;
3062 im->extra_flags |= ALTYGRID;
3065 im->extra_flags |= ALTAUTOSCALE;
3068 im->extra_flags |= ALTAUTOSCALE_MAX;
3071 im->extra_flags |= ONLY_GRAPH;
3074 im->extra_flags |= NOLEGEND;
3077 im->extra_flags |= FORCE_RULES_LEGEND;
3080 im->unitsexponent = atoi(optarg);
3083 im->unitslength = atoi(optarg);
3086 im->tabwidth = atof(optarg);
3089 im->step = atoi(optarg);
3095 if ((parsetime_error = parsetime(optarg, &start_tv))) {
3096 rrd_set_error( "start time: %s", parsetime_error );
3101 if ((parsetime_error = parsetime(optarg, &end_tv))) {
3102 rrd_set_error( "end time: %s", parsetime_error );
3107 if(strcmp(optarg,"none") == 0){
3113 "%10[A-Z]:%ld:%10[A-Z]:%ld:%10[A-Z]:%ld:%ld:%n",
3115 &im->xlab_user.gridst,
3117 &im->xlab_user.mgridst,
3119 &im->xlab_user.labst,
3120 &im->xlab_user.precis,
3121 &stroff) == 7 && stroff != 0){
3122 strncpy(im->xlab_form, optarg+stroff, sizeof(im->xlab_form) - 1);
3123 im->xlab_form[sizeof(im->xlab_form)-1] = '\0';
3124 if((int)(im->xlab_user.gridtm = tmt_conv(scan_gtm)) == -1){
3125 rrd_set_error("unknown keyword %s",scan_gtm);
3127 } else if ((int)(im->xlab_user.mgridtm = tmt_conv(scan_mtm)) == -1){
3128 rrd_set_error("unknown keyword %s",scan_mtm);
3130 } else if ((int)(im->xlab_user.labtm = tmt_conv(scan_ltm)) == -1){
3131 rrd_set_error("unknown keyword %s",scan_ltm);
3134 im->xlab_user.minsec = 1;
3135 im->xlab_user.stst = im->xlab_form;
3137 rrd_set_error("invalid x-grid format");
3143 if(strcmp(optarg,"none") == 0){
3151 &im->ylabfact) == 2) {
3152 if(im->ygridstep<=0){
3153 rrd_set_error("grid step must be > 0");
3155 } else if (im->ylabfact < 1){
3156 rrd_set_error("label factor must be > 0");
3160 rrd_set_error("invalid y-grid format");
3165 strncpy(im->ylegend,optarg,150);
3166 im->ylegend[150]='\0';
3169 im->maxval = atof(optarg);
3172 im->minval = atof(optarg);
3175 im->base = atol(optarg);
3176 if(im->base != 1024 && im->base != 1000 ){
3177 rrd_set_error("the only sensible value for base apart from 1000 is 1024");
3182 long_tmp = atol(optarg);
3183 if (long_tmp < 10) {
3184 rrd_set_error("width below 10 pixels");
3187 im->xsize = long_tmp;
3190 long_tmp = atol(optarg);
3191 if (long_tmp < 10) {
3192 rrd_set_error("height below 10 pixels");
3195 im->ysize = long_tmp;
3198 im->canvas->interlaced = 1;
3204 im->imginfo = optarg;
3207 if((int)(im->canvas->imgformat = if_conv(optarg)) == -1) {
3208 rrd_set_error("unsupported graphics format '%s'",optarg);
3220 im->logarithmic = 1;
3221 if (isnan(im->minval))
3226 "%10[A-Z]#%n%8lx%n",
3227 col_nam,&col_start,&color,&col_end) == 2){
3229 int col_len = col_end - col_start;
3233 ((color & 0xF00) * 0x110000) |
3234 ((color & 0x0F0) * 0x011000) |
3235 ((color & 0x00F) * 0x001100) |
3241 ((color & 0xF000) * 0x11000) |
3242 ((color & 0x0F00) * 0x01100) |
3243 ((color & 0x00F0) * 0x00110) |
3244 ((color & 0x000F) * 0x00011)
3248 color = (color << 8) + 0xff /* shift left by 8 */;
3253 rrd_set_error("the color format is #RRGGBB[AA]");
3256 if((ci=grc_conv(col_nam)) != -1){
3257 im->graph_col[ci]=color;
3259 rrd_set_error("invalid color name '%s'",col_nam);
3263 rrd_set_error("invalid color def format");
3270 char font[1024] = "";
3273 "%10[A-Z]:%lf:%1000s",
3274 prop,&size,font) >= 2){
3276 if((sindex=text_prop_conv(prop)) != -1){
3277 for (propidx=sindex;propidx<TEXT_PROP_LAST;propidx++){
3279 im->text_prop[propidx].size=size;
3281 if (strlen(font) > 0){
3282 strcpy(im->text_prop[propidx].font,font);
3284 if (propidx==sindex && sindex != 0) break;
3287 rrd_set_error("invalid fonttag '%s'",prop);
3291 rrd_set_error("invalid text property format");
3297 im->canvas->zoom = atof(optarg);
3298 if (im->canvas->zoom <= 0.0) {
3299 rrd_set_error("zoom factor must be > 0");
3304 strncpy(im->title,optarg,150);
3305 im->title[150]='\0';
3309 if ( strcmp( optarg, "normal" ) == 0 )
3310 im->canvas->aa_type = AA_NORMAL;
3311 else if ( strcmp( optarg, "light" ) == 0 )
3312 im->canvas->aa_type = AA_LIGHT;
3313 else if ( strcmp( optarg, "mono" ) == 0 )
3314 im->canvas->aa_type = AA_NONE;
3317 rrd_set_error("unknown font-render-mode '%s'", optarg );
3323 im->canvas->font_aa_threshold = atof(optarg);
3327 strncpy(im->watermark,optarg,100);
3328 im->watermark[99]='\0';
3333 rrd_set_error("unknown option '%c'", optopt);
3335 rrd_set_error("unknown option '%s'",argv[optind-1]);
3340 if (optind >= argc) {
3341 rrd_set_error("missing filename");
3345 if (im->logarithmic == 1 && (im->minval <= 0 || isnan(im->minval))){
3346 rrd_set_error("for a logarithmic yaxis you must specify a lower-limit > 0");
3350 if (proc_start_end(&start_tv,&end_tv,&start_tmp,&end_tmp) == -1){
3351 /* error string is set in parsetime.c */
3355 if (start_tmp < 3600*24*365*10){
3356 rrd_set_error("the first entry to fetch should be after 1980 (%ld)",start_tmp);
3360 if (end_tmp < start_tmp) {
3361 rrd_set_error("start (%ld) should be less than end (%ld)",
3362 start_tmp, end_tmp);
3366 im->start = start_tmp;
3368 im->step = max((long)im->step, (im->end-im->start)/im->xsize);
3372 rrd_graph_check_vname(image_desc_t *im, char *varname, char *err)
3374 if ((im->gdes[im->gdes_c-1].vidx=find_var(im,varname))==-1) {
3375 rrd_set_error("Unknown variable '%s' in %s",varname,err);
3381 rrd_graph_color(image_desc_t *im, char *var, char *err, int optional)
3384 graph_desc_t *gdp=&im->gdes[im->gdes_c-1];
3386 color=strstr(var,"#");
3389 rrd_set_error("Found no color in %s",err);
3398 rest=strstr(color,":");
3406 sscanf(color,"#%6lx%n",&col,&n);
3407 col = (col << 8) + 0xff /* shift left by 8 */;
3408 if (n!=7) rrd_set_error("Color problem in %s",err);
3411 sscanf(color,"#%8lx%n",&col,&n);
3414 rrd_set_error("Color problem in %s",err);
3416 if (rrd_test_error()) return 0;
3423 int bad_format(char *fmt) {
3427 while (*ptr != '\0')
3428 if (*ptr++ == '%') {
3430 /* line cannot end with percent char */
3431 if (*ptr == '\0') return 1;
3433 /* '%s', '%S' and '%%' are allowed */
3434 if (*ptr == 's' || *ptr == 'S' || *ptr == '%') ptr++;
3436 /* %c is allowed (but use only with vdef!) */
3437 else if (*ptr == 'c') {
3442 /* or else '% 6.2lf' and such are allowed */
3444 /* optional padding character */
3445 if (*ptr == ' ' || *ptr == '+' || *ptr == '-') ptr++;
3447 /* This should take care of 'm.n' with all three optional */
3448 while (*ptr >= '0' && *ptr <= '9') ptr++;
3449 if (*ptr == '.') ptr++;
3450 while (*ptr >= '0' && *ptr <= '9') ptr++;
3452 /* Either 'le', 'lf' or 'lg' must follow here */
3453 if (*ptr++ != 'l') return 1;
3454 if (*ptr == 'e' || *ptr == 'f' || *ptr == 'g') ptr++;
3465 vdef_parse(gdes,str)
3466 struct graph_desc_t *gdes;
3467 const char *const str;
3469 /* A VDEF currently is either "func" or "param,func"
3470 * so the parsing is rather simple. Change if needed.
3477 sscanf(str,"%le,%29[A-Z]%n",¶m,func,&n);
3478 if (n== (int)strlen(str)) { /* matched */
3482 sscanf(str,"%29[A-Z]%n",func,&n);
3483 if (n== (int)strlen(str)) { /* matched */
3486 rrd_set_error("Unknown function string '%s' in VDEF '%s'"
3493 if (!strcmp("PERCENT",func)) gdes->vf.op = VDEF_PERCENT;
3494 else if (!strcmp("MAXIMUM",func)) gdes->vf.op = VDEF_MAXIMUM;
3495 else if (!strcmp("AVERAGE",func)) gdes->vf.op = VDEF_AVERAGE;
3496 else if (!strcmp("MINIMUM",func)) gdes->vf.op = VDEF_MINIMUM;
3497 else if (!strcmp("TOTAL", func)) gdes->vf.op = VDEF_TOTAL;
3498 else if (!strcmp("FIRST", func)) gdes->vf.op = VDEF_FIRST;
3499 else if (!strcmp("LAST", func)) gdes->vf.op = VDEF_LAST;
3500 else if (!strcmp("LSLSLOPE", func)) gdes->vf.op = VDEF_LSLSLOPE;
3501 else if (!strcmp("LSLINT", func)) gdes->vf.op = VDEF_LSLINT;
3502 else if (!strcmp("LSLCORREL",func)) gdes->vf.op = VDEF_LSLCORREL;
3504 rrd_set_error("Unknown function '%s' in VDEF '%s'\n"
3511 switch (gdes->vf.op) {
3513 if (isnan(param)) { /* no parameter given */
3514 rrd_set_error("Function '%s' needs parameter in VDEF '%s'\n"
3520 if (param>=0.0 && param<=100.0) {
3521 gdes->vf.param = param;
3522 gdes->vf.val = DNAN; /* undefined */
3523 gdes->vf.when = 0; /* undefined */
3525 rrd_set_error("Parameter '%f' out of range in VDEF '%s'\n"
3540 case VDEF_LSLCORREL:
3542 gdes->vf.param = DNAN;
3543 gdes->vf.val = DNAN;
3546 rrd_set_error("Function '%s' needs no parameter in VDEF '%s'\n"
3563 graph_desc_t *src,*dst;
3567 dst = &im->gdes[gdi];
3568 src = &im->gdes[dst->vidx];
3569 data = src->data + src->ds;
3570 steps = (src->end - src->start) / src->step;
3573 printf("DEBUG: start == %lu, end == %lu, %lu steps\n"
3580 switch (dst->vf.op) {
3581 case VDEF_PERCENT: {
3582 rrd_value_t * array;
3586 if ((array = malloc(steps*sizeof(double)))==NULL) {
3587 rrd_set_error("malloc VDEV_PERCENT");
3590 for (step=0;step < steps; step++) {
3591 array[step]=data[step*src->ds_cnt];
3593 qsort(array,step,sizeof(double),vdef_percent_compar);
3595 field = (steps-1)*dst->vf.param/100;
3596 dst->vf.val = array[field];
3597 dst->vf.when = 0; /* no time component */
3600 for(step=0;step<steps;step++)
3601 printf("DEBUG: %3li:%10.2f %c\n",step,array[step],step==field?'*':' ');
3607 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3608 if (step == steps) {
3612 dst->vf.val = data[step*src->ds_cnt];
3613 dst->vf.when = src->start + (step+1)*src->step;
3615 while (step != steps) {
3616 if (finite(data[step*src->ds_cnt])) {
3617 if (data[step*src->ds_cnt] > dst->vf.val) {
3618 dst->vf.val = data[step*src->ds_cnt];
3619 dst->vf.when = src->start + (step+1)*src->step;
3626 case VDEF_AVERAGE: {
3629 for (step=0;step<steps;step++) {
3630 if (finite(data[step*src->ds_cnt])) {
3631 sum += data[step*src->ds_cnt];
3636 if (dst->vf.op == VDEF_TOTAL) {
3637 dst->vf.val = sum*src->step;
3638 dst->vf.when = cnt*src->step; /* not really "when" */
3640 dst->vf.val = sum/cnt;
3641 dst->vf.when = 0; /* no time component */
3651 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3652 if (step == steps) {
3656 dst->vf.val = data[step*src->ds_cnt];
3657 dst->vf.when = src->start + (step+1)*src->step;
3659 while (step != steps) {
3660 if (finite(data[step*src->ds_cnt])) {
3661 if (data[step*src->ds_cnt] < dst->vf.val) {
3662 dst->vf.val = data[step*src->ds_cnt];
3663 dst->vf.when = src->start + (step+1)*src->step;
3670 /* The time value returned here is one step before the
3671 * actual time value. This is the start of the first
3675 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3676 if (step == steps) { /* all entries were NaN */
3680 dst->vf.val = data[step*src->ds_cnt];
3681 dst->vf.when = src->start + step*src->step;
3685 /* The time value returned here is the
3686 * actual time value. This is the end of the last
3690 while (step >= 0 && isnan(data[step*src->ds_cnt])) step--;
3691 if (step < 0) { /* all entries were NaN */
3695 dst->vf.val = data[step*src->ds_cnt];
3696 dst->vf.when = src->start + (step+1)*src->step;
3701 case VDEF_LSLCORREL:{
3702 /* Bestfit line by linear least squares method */
3705 double SUMx, SUMy, SUMxy, SUMxx, SUMyy, slope, y_intercept, correl ;
3706 SUMx = 0; SUMy = 0; SUMxy = 0; SUMxx = 0; SUMyy = 0;
3708 for (step=0;step<steps;step++) {
3709 if (finite(data[step*src->ds_cnt])) {
3712 SUMxx += step * step;
3713 SUMxy += step * data[step*src->ds_cnt];
3714 SUMy += data[step*src->ds_cnt];
3715 SUMyy += data[step*src->ds_cnt]*data[step*src->ds_cnt];
3719 slope = ( SUMx*SUMy - cnt*SUMxy ) / ( SUMx*SUMx - cnt*SUMxx );
3720 y_intercept = ( SUMy - slope*SUMx ) / cnt;
3721 correl = (SUMxy - (SUMx*SUMy)/cnt) / sqrt((SUMxx - (SUMx*SUMx)/cnt)*(SUMyy - (SUMy*SUMy)/cnt));
3724 if (dst->vf.op == VDEF_LSLSLOPE) {
3725 dst->vf.val = slope;
3726 dst->vf.when = cnt*src->step;
3727 } else if (dst->vf.op == VDEF_LSLINT) {
3728 dst->vf.val = y_intercept;
3729 dst->vf.when = cnt*src->step;
3730 } else if (dst->vf.op == VDEF_LSLCORREL) {
3731 dst->vf.val = correl;
3732 dst->vf.when = cnt*src->step;
3745 /* NaN < -INF < finite_values < INF */
3747 vdef_percent_compar(a,b)
3750 /* Equality is not returned; this doesn't hurt except
3751 * (maybe) for a little performance.
3754 /* First catch NaN values. They are smallest */
3755 if (isnan( *(double *)a )) return -1;
3756 if (isnan( *(double *)b )) return 1;
3758 /* NaN doesn't reach this part so INF and -INF are extremes.
3759 * The sign from isinf() is compatible with the sign we return
3761 if (isinf( *(double *)a )) return isinf( *(double *)a );
3762 if (isinf( *(double *)b )) return isinf( *(double *)b );
3764 /* If we reach this, both values must be finite */
3765 if ( *(double *)a < *(double *)b ) return -1; else return 1;