1 /****************************************************************************
2 * RRDtool 1.2.11 Copyright by Tobi Oetiker, 1997-2005
3 ****************************************************************************
4 * rrd__graph.c produce graphs from data in rrdfiles
5 ****************************************************************************/
12 #if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
25 #include "rrd_graph.h"
27 /* some constant definitions */
31 #ifndef RRD_DEFAULT_FONT
32 /* there is special code later to pick Cour.ttf when running on windows */
33 #define RRD_DEFAULT_FONT "DejaVuSansMono-Roman.ttf"
36 text_prop_t text_prop[] = {
37 { 8.0, RRD_DEFAULT_FONT }, /* default */
38 { 9.0, RRD_DEFAULT_FONT }, /* title */
39 { 7.0, RRD_DEFAULT_FONT }, /* axis */
40 { 8.0, RRD_DEFAULT_FONT }, /* unit */
41 { 8.0, RRD_DEFAULT_FONT } /* legend */
45 {0, 0, TMT_SECOND,30, TMT_MINUTE,5, TMT_MINUTE,5, 0,"%H:%M"},
46 {2, 0, TMT_MINUTE,1, TMT_MINUTE,5, TMT_MINUTE,5, 0,"%H:%M"},
47 {5, 0, TMT_MINUTE,2, TMT_MINUTE,10, TMT_MINUTE,10, 0,"%H:%M"},
48 {10, 0, TMT_MINUTE,5, TMT_MINUTE,20, TMT_MINUTE,20, 0,"%H:%M"},
49 {30, 0, TMT_MINUTE,10, TMT_HOUR,1, TMT_HOUR,1, 0,"%H:%M"},
50 {60, 0, TMT_MINUTE,30, TMT_HOUR,2, TMT_HOUR,2, 0,"%H:%M"},
51 {180, 0, TMT_HOUR,1, TMT_HOUR,6, TMT_HOUR,6, 0,"%H:%M"},
52 {180, 1*24*3600, TMT_HOUR,1, TMT_HOUR,6, TMT_HOUR,6, 0,"%a %H:%M"},
53 /*{300, 0, TMT_HOUR,3, TMT_HOUR,12, TMT_HOUR,12, 12*3600,"%a %p"}, this looks silly*/
54 {600, 0, TMT_HOUR,6, TMT_DAY,1, TMT_DAY,1, 24*3600,"%a"},
55 {600, 1*24*3600, TMT_HOUR,6, TMT_DAY,1, TMT_DAY,1, 24*3600,"%a %d"},
56 {1800, 0, TMT_HOUR,12, TMT_DAY,1, TMT_DAY,2, 24*3600,"%a"},
57 {1800, 1*24*3600, TMT_HOUR,12, TMT_DAY,1, TMT_DAY,2, 24*3600,"%a %d"},
58 {3600, 0, TMT_DAY,1, TMT_WEEK,1, TMT_WEEK,1, 7*24*3600,"Week %V"},
59 {3*3600, 0, TMT_WEEK,1, TMT_MONTH,1, TMT_WEEK,2, 7*24*3600,"Week %V"},
60 {6*3600, 0, TMT_MONTH,1, TMT_MONTH,1, TMT_MONTH,1, 30*24*3600,"%b"},
61 {48*3600, 0, TMT_MONTH,1, TMT_MONTH,3, TMT_MONTH,3, 30*24*3600,"%b"},
62 {10*24*3600, 0, TMT_YEAR,1, TMT_YEAR,1, TMT_YEAR,1, 365*24*3600,"%y"},
63 {-1,0,TMT_MONTH,0,TMT_MONTH,0,TMT_MONTH,0,0,""}
66 /* sensible logarithmic y label intervals ...
67 the first element of each row defines the possible starting points on the
68 y axis ... the other specify the */
70 double yloglab[][12]= {{ 1e9, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
71 { 1e3, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
72 { 1e1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
73 /* { 1e1, 1, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, */
74 { 1e1, 1, 2.5, 5, 7.5, 0, 0, 0, 0, 0, 0, 0 },
75 { 1e1, 1, 2, 4, 6, 8, 0, 0, 0, 0, 0, 0 },
76 { 1e1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0 },
77 { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }};
79 /* sensible y label intervals ...*/
97 gfx_color_t graph_col[] = /* default colors */
98 { 0xFFFFFFFF, /* canvas */
99 0xF0F0F0FF, /* background */
100 0xD0D0D0FF, /* shade A */
101 0xA0A0A0FF, /* shade B */
102 0x90909080, /* grid */
103 0xE0505080, /* major grid */
104 0x000000FF, /* font */
105 0x802020FF, /* arrow */
106 0x202020FF, /* axis */
107 0x000000FF /* frame */
114 # define DPRINT(x) (void)(printf x, printf("\n"))
120 /* initialize with xtr(im,0); */
122 xtr(image_desc_t *im,time_t mytime){
125 pixie = (double) im->xsize / (double)(im->end - im->start);
128 return (int)((double)im->xorigin
129 + pixie * ( mytime - im->start ) );
132 /* translate data values into y coordinates */
134 ytr(image_desc_t *im, double value){
139 pixie = (double) im->ysize / (im->maxval - im->minval);
141 pixie = (double) im->ysize / (log10(im->maxval) - log10(im->minval));
143 } else if(!im->logarithmic) {
144 yval = im->yorigin - pixie * (value - im->minval);
146 if (value < im->minval) {
149 yval = im->yorigin - pixie * (log10(value) - log10(im->minval));
152 /* make sure we don't return anything too unreasonable. GD lib can
153 get terribly slow when drawing lines outside its scope. This is
154 especially problematic in connection with the rigid option */
156 /* keep yval as-is */
157 } else if (yval > im->yorigin) {
158 yval = im->yorigin +0.00001;
159 } else if (yval < im->yorigin - im->ysize){
160 yval = im->yorigin - im->ysize - 0.00001;
167 /* conversion function for symbolic entry names */
170 #define conv_if(VV,VVV) \
171 if (strcmp(#VV, string) == 0) return VVV ;
173 enum gf_en gf_conv(char *string){
175 conv_if(PRINT,GF_PRINT)
176 conv_if(GPRINT,GF_GPRINT)
177 conv_if(COMMENT,GF_COMMENT)
178 conv_if(HRULE,GF_HRULE)
179 conv_if(VRULE,GF_VRULE)
180 conv_if(LINE,GF_LINE)
181 conv_if(AREA,GF_AREA)
182 conv_if(STACK,GF_STACK)
183 conv_if(TICK,GF_TICK)
185 conv_if(CDEF,GF_CDEF)
186 conv_if(VDEF,GF_VDEF)
188 conv_if(PART,GF_PART)
190 conv_if(XPORT,GF_XPORT)
191 conv_if(SHIFT,GF_SHIFT)
196 enum gfx_if_en if_conv(char *string){
206 enum tmt_en tmt_conv(char *string){
208 conv_if(SECOND,TMT_SECOND)
209 conv_if(MINUTE,TMT_MINUTE)
210 conv_if(HOUR,TMT_HOUR)
212 conv_if(WEEK,TMT_WEEK)
213 conv_if(MONTH,TMT_MONTH)
214 conv_if(YEAR,TMT_YEAR)
218 enum grc_en grc_conv(char *string){
220 conv_if(BACK,GRC_BACK)
221 conv_if(CANVAS,GRC_CANVAS)
222 conv_if(SHADEA,GRC_SHADEA)
223 conv_if(SHADEB,GRC_SHADEB)
224 conv_if(GRID,GRC_GRID)
225 conv_if(MGRID,GRC_MGRID)
226 conv_if(FONT,GRC_FONT)
227 conv_if(ARROW,GRC_ARROW)
228 conv_if(AXIS,GRC_AXIS)
229 conv_if(FRAME,GRC_FRAME)
234 enum text_prop_en text_prop_conv(char *string){
236 conv_if(DEFAULT,TEXT_PROP_DEFAULT)
237 conv_if(TITLE,TEXT_PROP_TITLE)
238 conv_if(AXIS,TEXT_PROP_AXIS)
239 conv_if(UNIT,TEXT_PROP_UNIT)
240 conv_if(LEGEND,TEXT_PROP_LEGEND)
248 im_free(image_desc_t *im)
252 if (im == NULL) return 0;
253 for(i=0;i<(unsigned)im->gdes_c;i++){
254 if (im->gdes[i].data_first){
255 /* careful here, because a single pointer can occur several times */
256 free (im->gdes[i].data);
257 if (im->gdes[i].ds_namv){
258 for (ii=0;ii<im->gdes[i].ds_cnt;ii++)
259 free(im->gdes[i].ds_namv[ii]);
260 free(im->gdes[i].ds_namv);
263 free (im->gdes[i].p_data);
264 free (im->gdes[i].rpnp);
267 gfx_destroy(im->canvas);
271 /* find SI magnitude symbol for the given number*/
274 image_desc_t *im, /* image description */
281 char *symbol[] = {"a", /* 10e-18 Atto */
282 "f", /* 10e-15 Femto */
283 "p", /* 10e-12 Pico */
284 "n", /* 10e-9 Nano */
285 "u", /* 10e-6 Micro */
286 "m", /* 10e-3 Milli */
291 "T", /* 10e12 Tera */
292 "P", /* 10e15 Peta */
298 if (*value == 0.0 || isnan(*value) ) {
302 sindex = floor(log(fabs(*value))/log((double)im->base));
303 *magfact = pow((double)im->base, (double)sindex);
304 (*value) /= (*magfact);
306 if ( sindex <= symbcenter && sindex >= -symbcenter) {
307 (*symb_ptr) = symbol[sindex+symbcenter];
315 /* find SI magnitude symbol for the numbers on the y-axis*/
318 image_desc_t *im /* image description */
322 char symbol[] = {'a', /* 10e-18 Atto */
323 'f', /* 10e-15 Femto */
324 'p', /* 10e-12 Pico */
325 'n', /* 10e-9 Nano */
326 'u', /* 10e-6 Micro */
327 'm', /* 10e-3 Milli */
332 'T', /* 10e12 Tera */
333 'P', /* 10e15 Peta */
337 double digits,viewdigits=0;
339 digits = floor( log( max( fabs(im->minval),fabs(im->maxval)))/log((double)im->base));
341 if (im->unitsexponent != 9999) {
342 /* unitsexponent = 9, 6, 3, 0, -3, -6, -9, etc */
343 viewdigits = floor(im->unitsexponent / 3);
348 im->magfact = pow((double)im->base , digits);
351 printf("digits %6.3f im->magfact %6.3f\n",digits,im->magfact);
354 im->viewfactor = im->magfact / pow((double)im->base , viewdigits);
356 if ( ((viewdigits+symbcenter) < sizeof(symbol)) &&
357 ((viewdigits+symbcenter) >= 0) )
358 im->symbol = symbol[(int)viewdigits+symbcenter];
363 /* move min and max values around to become sensible */
366 expand_range(image_desc_t *im)
368 double sensiblevalues[] ={1000.0,900.0,800.0,750.0,700.0,
369 600.0,500.0,400.0,300.0,250.0,
370 200.0,125.0,100.0,90.0,80.0,
371 75.0,70.0,60.0,50.0,40.0,30.0,
372 25.0,20.0,10.0,9.0,8.0,
373 7.0,6.0,5.0,4.0,3.5,3.0,
374 2.5,2.0,1.8,1.5,1.2,1.0,
375 0.8,0.7,0.6,0.5,0.4,0.3,0.2,0.1,0.0,-1};
377 double scaled_min,scaled_max;
384 printf("Min: %6.2f Max: %6.2f MagFactor: %6.2f\n",
385 im->minval,im->maxval,im->magfact);
388 if (isnan(im->ygridstep)){
389 if(im->extra_flags & ALTAUTOSCALE) {
390 /* measure the amplitude of the function. Make sure that
391 graph boundaries are slightly higher then max/min vals
392 so we can see amplitude on the graph */
395 delt = im->maxval - im->minval;
397 fact = 2.0 * pow(10.0,
398 floor(log10(max(fabs(im->minval), fabs(im->maxval))/im->magfact)) - 2);
400 adj = (fact - delt) * 0.55;
402 printf("Min: %6.2f Max: %6.2f delt: %6.2f fact: %6.2f adj: %6.2f\n", im->minval, im->maxval, delt, fact, adj);
408 else if(im->extra_flags & ALTAUTOSCALE_MAX) {
409 /* measure the amplitude of the function. Make sure that
410 graph boundaries are slightly higher than max vals
411 so we can see amplitude on the graph */
412 adj = (im->maxval - im->minval) * 0.1;
416 scaled_min = im->minval / im->magfact;
417 scaled_max = im->maxval / im->magfact;
419 for (i=1; sensiblevalues[i] > 0; i++){
420 if (sensiblevalues[i-1]>=scaled_min &&
421 sensiblevalues[i]<=scaled_min)
422 im->minval = sensiblevalues[i]*(im->magfact);
424 if (-sensiblevalues[i-1]<=scaled_min &&
425 -sensiblevalues[i]>=scaled_min)
426 im->minval = -sensiblevalues[i-1]*(im->magfact);
428 if (sensiblevalues[i-1] >= scaled_max &&
429 sensiblevalues[i] <= scaled_max)
430 im->maxval = sensiblevalues[i-1]*(im->magfact);
432 if (-sensiblevalues[i-1]<=scaled_max &&
433 -sensiblevalues[i] >=scaled_max)
434 im->maxval = -sensiblevalues[i]*(im->magfact);
438 /* adjust min and max to the grid definition if there is one */
439 im->minval = (double)im->ylabfact * im->ygridstep *
440 floor(im->minval / ((double)im->ylabfact * im->ygridstep));
441 im->maxval = (double)im->ylabfact * im->ygridstep *
442 ceil(im->maxval /( (double)im->ylabfact * im->ygridstep));
446 fprintf(stderr,"SCALED Min: %6.2f Max: %6.2f Factor: %6.2f\n",
447 im->minval,im->maxval,im->magfact);
452 apply_gridfit(image_desc_t *im)
454 if (isnan(im->minval) || isnan(im->maxval))
457 if (im->logarithmic) {
458 double ya, yb, ypix, ypixfrac;
459 double log10_range = log10(im->maxval) - log10(im->minval);
460 ya = pow((double)10, floor(log10(im->minval)));
461 while (ya < im->minval)
464 return; /* don't have y=10^x gridline */
466 if (yb <= im->maxval) {
467 /* we have at least 2 y=10^x gridlines.
468 Make sure distance between them in pixels
469 are an integer by expanding im->maxval */
470 double y_pixel_delta = ytr(im, ya) - ytr(im, yb);
471 double factor = y_pixel_delta / floor(y_pixel_delta);
472 double new_log10_range = factor * log10_range;
473 double new_ymax_log10 = log10(im->minval) + new_log10_range;
474 im->maxval = pow(10, new_ymax_log10);
475 ytr(im,DNAN); /* reset precalc */
476 log10_range = log10(im->maxval) - log10(im->minval);
478 /* make sure first y=10^x gridline is located on
479 integer pixel position by moving scale slightly
480 downwards (sub-pixel movement) */
481 ypix = ytr(im, ya) + im->ysize; /* add im->ysize so it always is positive */
482 ypixfrac = ypix - floor(ypix);
483 if (ypixfrac > 0 && ypixfrac < 1) {
484 double yfrac = ypixfrac / im->ysize;
485 im->minval = pow(10, log10(im->minval) - yfrac * log10_range);
486 im->maxval = pow(10, log10(im->maxval) - yfrac * log10_range);
487 ytr(im,DNAN); /* reset precalc */
490 /* Make sure we have an integer pixel distance between
491 each minor gridline */
492 double ypos1 = ytr(im, im->minval);
493 double ypos2 = ytr(im, im->minval + im->ygrid_scale.gridstep);
494 double y_pixel_delta = ypos1 - ypos2;
495 double factor = y_pixel_delta / floor(y_pixel_delta);
496 double new_range = factor * (im->maxval - im->minval);
497 double gridstep = im->ygrid_scale.gridstep;
498 double minor_y, minor_y_px, minor_y_px_frac;
499 im->maxval = im->minval + new_range;
500 ytr(im,DNAN); /* reset precalc */
501 /* make sure first minor gridline is on integer pixel y coord */
502 minor_y = gridstep * floor(im->minval / gridstep);
503 while (minor_y < im->minval)
505 minor_y_px = ytr(im, minor_y) + im->ysize; /* ensure > 0 by adding ysize */
506 minor_y_px_frac = minor_y_px - floor(minor_y_px);
507 if (minor_y_px_frac > 0 && minor_y_px_frac < 1) {
508 double yfrac = minor_y_px_frac / im->ysize;
509 double range = im->maxval - im->minval;
510 im->minval = im->minval - yfrac * range;
511 im->maxval = im->maxval - yfrac * range;
512 ytr(im,DNAN); /* reset precalc */
514 calc_horizontal_grid(im); /* recalc with changed im->maxval */
518 /* reduce data reimplementation by Alex */
522 enum cf_en cf, /* which consolidation function ?*/
523 unsigned long cur_step, /* step the data currently is in */
524 time_t *start, /* start, end and step as requested ... */
525 time_t *end, /* ... by the application will be ... */
526 unsigned long *step, /* ... adjusted to represent reality */
527 unsigned long *ds_cnt, /* number of data sources in file */
528 rrd_value_t **data) /* two dimensional array containing the data */
530 int i,reduce_factor = ceil((double)(*step) / (double)cur_step);
531 unsigned long col,dst_row,row_cnt,start_offset,end_offset,skiprows=0;
532 rrd_value_t *srcptr,*dstptr;
534 (*step) = cur_step*reduce_factor; /* set new step size for reduced data */
537 row_cnt = ((*end)-(*start))/cur_step;
543 printf("Reducing %lu rows with factor %i time %lu to %lu, step %lu\n",
544 row_cnt,reduce_factor,*start,*end,cur_step);
545 for (col=0;col<row_cnt;col++) {
546 printf("time %10lu: ",*start+(col+1)*cur_step);
547 for (i=0;i<*ds_cnt;i++)
548 printf(" %8.2e",srcptr[*ds_cnt*col+i]);
553 /* We have to combine [reduce_factor] rows of the source
554 ** into one row for the destination. Doing this we also
555 ** need to take care to combine the correct rows. First
556 ** alter the start and end time so that they are multiples
557 ** of the new step time. We cannot reduce the amount of
558 ** time so we have to move the end towards the future and
559 ** the start towards the past.
561 end_offset = (*end) % (*step);
562 start_offset = (*start) % (*step);
564 /* If there is a start offset (which cannot be more than
565 ** one destination row), skip the appropriate number of
566 ** source rows and one destination row. The appropriate
567 ** number is what we do know (start_offset/cur_step) of
568 ** the new interval (*step/cur_step aka reduce_factor).
571 printf("start_offset: %lu end_offset: %lu\n",start_offset,end_offset);
572 printf("row_cnt before: %lu\n",row_cnt);
575 (*start) = (*start)-start_offset;
576 skiprows=reduce_factor-start_offset/cur_step;
577 srcptr+=skiprows* *ds_cnt;
578 for (col=0;col<(*ds_cnt);col++) *dstptr++ = DNAN;
582 printf("row_cnt between: %lu\n",row_cnt);
585 /* At the end we have some rows that are not going to be
586 ** used, the amount is end_offset/cur_step
589 (*end) = (*end)-end_offset+(*step);
590 skiprows = end_offset/cur_step;
594 printf("row_cnt after: %lu\n",row_cnt);
597 /* Sanity check: row_cnt should be multiple of reduce_factor */
598 /* if this gets triggered, something is REALLY WRONG ... we die immediately */
600 if (row_cnt%reduce_factor) {
601 printf("SANITY CHECK: %lu rows cannot be reduced by %i \n",
602 row_cnt,reduce_factor);
603 printf("BUG in reduce_data()\n");
607 /* Now combine reduce_factor intervals at a time
608 ** into one interval for the destination.
611 for (dst_row=0;(long int)row_cnt>=reduce_factor;dst_row++) {
612 for (col=0;col<(*ds_cnt);col++) {
613 rrd_value_t newval=DNAN;
614 unsigned long validval=0;
616 for (i=0;i<reduce_factor;i++) {
617 if (isnan(srcptr[i*(*ds_cnt)+col])) {
621 if (isnan(newval)) newval = srcptr[i*(*ds_cnt)+col];
629 newval += srcptr[i*(*ds_cnt)+col];
632 newval = min (newval,srcptr[i*(*ds_cnt)+col]);
635 /* an interval contains a failure if any subintervals contained a failure */
637 newval = max (newval,srcptr[i*(*ds_cnt)+col]);
640 newval = srcptr[i*(*ds_cnt)+col];
645 if (validval == 0){newval = DNAN;} else{
663 srcptr+=(*ds_cnt)*reduce_factor;
664 row_cnt-=reduce_factor;
666 /* If we had to alter the endtime, we didn't have enough
667 ** source rows to fill the last row. Fill it with NaN.
669 if (end_offset) for (col=0;col<(*ds_cnt);col++) *dstptr++ = DNAN;
671 row_cnt = ((*end)-(*start))/ *step;
673 printf("Done reducing. Currently %lu rows, time %lu to %lu, step %lu\n",
674 row_cnt,*start,*end,*step);
675 for (col=0;col<row_cnt;col++) {
676 printf("time %10lu: ",*start+(col+1)*(*step));
677 for (i=0;i<*ds_cnt;i++)
678 printf(" %8.2e",srcptr[*ds_cnt*col+i]);
685 /* get the data required for the graphs from the
689 data_fetch(image_desc_t *im )
694 /* pull the data from the rrd files ... */
695 for (i=0;i< (int)im->gdes_c;i++){
696 /* only GF_DEF elements fetch data */
697 if (im->gdes[i].gf != GF_DEF)
701 /* do we have it already ?*/
702 for (ii=0;ii<i;ii++) {
703 if (im->gdes[ii].gf != GF_DEF)
705 if ((strcmp(im->gdes[i].rrd, im->gdes[ii].rrd) == 0)
706 && (im->gdes[i].cf == im->gdes[ii].cf)
707 && (im->gdes[i].cf_reduce == im->gdes[ii].cf_reduce)
708 && (im->gdes[i].start_orig == im->gdes[ii].start_orig)
709 && (im->gdes[i].end_orig == im->gdes[ii].end_orig)
710 && (im->gdes[i].step_orig == im->gdes[ii].step_orig)) {
711 /* OK, the data is already there.
712 ** Just copy the header portion
714 im->gdes[i].start = im->gdes[ii].start;
715 im->gdes[i].end = im->gdes[ii].end;
716 im->gdes[i].step = im->gdes[ii].step;
717 im->gdes[i].ds_cnt = im->gdes[ii].ds_cnt;
718 im->gdes[i].ds_namv = im->gdes[ii].ds_namv;
719 im->gdes[i].data = im->gdes[ii].data;
720 im->gdes[i].data_first = 0;
727 unsigned long ft_step = im->gdes[i].step ;
729 if((rrd_fetch_fn(im->gdes[i].rrd,
735 &im->gdes[i].ds_namv,
736 &im->gdes[i].data)) == -1){
739 im->gdes[i].data_first = 1;
740 im->gdes[i].step = im->step;
742 if (ft_step < im->gdes[i].step) {
743 reduce_data(im->gdes[i].cf_reduce,
751 im->gdes[i].step = ft_step;
755 /* lets see if the required data source is really there */
756 for(ii=0;ii<(int)im->gdes[i].ds_cnt;ii++){
757 if(strcmp(im->gdes[i].ds_namv[ii],im->gdes[i].ds_nam) == 0){
760 if (im->gdes[i].ds== -1){
761 rrd_set_error("No DS called '%s' in '%s'",
762 im->gdes[i].ds_nam,im->gdes[i].rrd);
770 /* evaluate the expressions in the CDEF functions */
772 /*************************************************************
774 *************************************************************/
777 find_var_wrapper(void *arg1, char *key)
779 return find_var((image_desc_t *) arg1, key);
782 /* find gdes containing var*/
784 find_var(image_desc_t *im, char *key){
786 for(ii=0;ii<im->gdes_c-1;ii++){
787 if((im->gdes[ii].gf == GF_DEF
788 || im->gdes[ii].gf == GF_VDEF
789 || im->gdes[ii].gf == GF_CDEF)
790 && (strcmp(im->gdes[ii].vname,key) == 0)){
797 /* find the largest common denominator for all the numbers
798 in the 0 terminated num array */
803 for (i=0;num[i+1]!=0;i++){
805 rest=num[i] % num[i+1];
806 num[i]=num[i+1]; num[i+1]=rest;
810 /* return i==0?num[i]:num[i-1]; */
814 /* run the rpn calculator on all the VDEF and CDEF arguments */
816 data_calc( image_desc_t *im){
820 long *steparray, rpi;
825 rpnstack_init(&rpnstack);
827 for (gdi=0;gdi<im->gdes_c;gdi++){
828 /* Look for GF_VDEF and GF_CDEF in the same loop,
829 * so CDEFs can use VDEFs and vice versa
831 switch (im->gdes[gdi].gf) {
835 graph_desc_t *vdp = &im->gdes[im->gdes[gdi].vidx];
837 /* remove current shift */
838 vdp->start -= vdp->shift;
839 vdp->end -= vdp->shift;
842 if (im->gdes[gdi].shidx >= 0)
843 vdp->shift = im->gdes[im->gdes[gdi].shidx].vf.val;
846 vdp->shift = im->gdes[gdi].shval;
848 /* normalize shift to multiple of consolidated step */
849 vdp->shift = (vdp->shift / (long)vdp->step) * (long)vdp->step;
852 vdp->start += vdp->shift;
853 vdp->end += vdp->shift;
857 /* A VDEF has no DS. This also signals other parts
858 * of rrdtool that this is a VDEF value, not a CDEF.
860 im->gdes[gdi].ds_cnt = 0;
861 if (vdef_calc(im,gdi)) {
862 rrd_set_error("Error processing VDEF '%s'"
865 rpnstack_free(&rpnstack);
870 im->gdes[gdi].ds_cnt = 1;
871 im->gdes[gdi].ds = 0;
872 im->gdes[gdi].data_first = 1;
873 im->gdes[gdi].start = 0;
874 im->gdes[gdi].end = 0;
879 /* Find the variables in the expression.
880 * - VDEF variables are substituted by their values
881 * and the opcode is changed into OP_NUMBER.
882 * - CDEF variables are analized for their step size,
883 * the lowest common denominator of all the step
884 * sizes of the data sources involved is calculated
885 * and the resulting number is the step size for the
886 * resulting data source.
888 for(rpi=0;im->gdes[gdi].rpnp[rpi].op != OP_END;rpi++){
889 if(im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
890 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER){
891 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
892 if (im->gdes[ptr].ds_cnt == 0) { /* this is a VDEF data source */
894 printf("DEBUG: inside CDEF '%s' processing VDEF '%s'\n",
896 im->gdes[ptr].vname);
897 printf("DEBUG: value from vdef is %f\n",im->gdes[ptr].vf.val);
899 im->gdes[gdi].rpnp[rpi].val = im->gdes[ptr].vf.val;
900 im->gdes[gdi].rpnp[rpi].op = OP_NUMBER;
901 } else { /* normal variables and PREF(variables) */
903 /* add one entry to the array that keeps track of the step sizes of the
904 * data sources going into the CDEF. */
906 rrd_realloc(steparray,
907 (++stepcnt+1)*sizeof(*steparray)))==NULL){
908 rrd_set_error("realloc steparray");
909 rpnstack_free(&rpnstack);
913 steparray[stepcnt-1] = im->gdes[ptr].step;
915 /* adjust start and end of cdef (gdi) so
916 * that it runs from the latest start point
917 * to the earliest endpoint of any of the
918 * rras involved (ptr)
921 if(im->gdes[gdi].start < im->gdes[ptr].start)
922 im->gdes[gdi].start = im->gdes[ptr].start;
924 if(im->gdes[gdi].end == 0 ||
925 im->gdes[gdi].end > im->gdes[ptr].end)
926 im->gdes[gdi].end = im->gdes[ptr].end;
928 /* store pointer to the first element of
929 * the rra providing data for variable,
930 * further save step size and data source
933 im->gdes[gdi].rpnp[rpi].data = im->gdes[ptr].data + im->gdes[ptr].ds;
934 im->gdes[gdi].rpnp[rpi].step = im->gdes[ptr].step;
935 im->gdes[gdi].rpnp[rpi].ds_cnt = im->gdes[ptr].ds_cnt;
937 /* backoff the *.data ptr; this is done so
938 * rpncalc() function doesn't have to treat
939 * the first case differently
941 } /* if ds_cnt != 0 */
942 } /* if OP_VARIABLE */
943 } /* loop through all rpi */
945 /* move the data pointers to the correct period */
946 for(rpi=0;im->gdes[gdi].rpnp[rpi].op != OP_END;rpi++){
947 if(im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
948 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER){
949 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
950 long diff = im->gdes[gdi].start - im->gdes[ptr].start;
953 im->gdes[gdi].rpnp[rpi].data += (diff / im->gdes[ptr].step) * im->gdes[ptr].ds_cnt;
957 if(steparray == NULL){
958 rrd_set_error("rpn expressions without DEF"
959 " or CDEF variables are not supported");
960 rpnstack_free(&rpnstack);
963 steparray[stepcnt]=0;
964 /* Now find the resulting step. All steps in all
965 * used RRAs have to be visited
967 im->gdes[gdi].step = lcd(steparray);
969 if((im->gdes[gdi].data = malloc((
970 (im->gdes[gdi].end-im->gdes[gdi].start)
971 / im->gdes[gdi].step)
972 * sizeof(double)))==NULL){
973 rrd_set_error("malloc im->gdes[gdi].data");
974 rpnstack_free(&rpnstack);
978 /* Step through the new cdef results array and
979 * calculate the values
981 for (now = im->gdes[gdi].start + im->gdes[gdi].step;
982 now<=im->gdes[gdi].end;
983 now += im->gdes[gdi].step)
985 rpnp_t *rpnp = im -> gdes[gdi].rpnp;
987 /* 3rd arg of rpn_calc is for OP_VARIABLE lookups;
988 * in this case we are advancing by timesteps;
989 * we use the fact that time_t is a synonym for long
991 if (rpn_calc(rpnp,&rpnstack,(long) now,
992 im->gdes[gdi].data,++dataidx) == -1) {
993 /* rpn_calc sets the error string */
994 rpnstack_free(&rpnstack);
997 } /* enumerate over time steps within a CDEF */
1002 } /* enumerate over CDEFs */
1003 rpnstack_free(&rpnstack);
1007 /* massage data so, that we get one value for each x coordinate in the graph */
1009 data_proc( image_desc_t *im ){
1011 double pixstep = (double)(im->end-im->start)
1012 /(double)im->xsize; /* how much time
1013 passes in one pixel */
1015 double minval=DNAN,maxval=DNAN;
1017 unsigned long gr_time;
1019 /* memory for the processed data */
1020 for(i=0;i<im->gdes_c;i++) {
1021 if((im->gdes[i].gf==GF_LINE) ||
1022 (im->gdes[i].gf==GF_AREA) ||
1023 (im->gdes[i].gf==GF_TICK) ||
1024 (im->gdes[i].gf==GF_STACK)) {
1025 if((im->gdes[i].p_data = malloc((im->xsize +1)
1026 * sizeof(rrd_value_t)))==NULL){
1027 rrd_set_error("malloc data_proc");
1033 for (i=0;i<im->xsize;i++) { /* for each pixel */
1035 gr_time = im->start+pixstep*i; /* time of the current step */
1038 for (ii=0;ii<im->gdes_c;ii++) {
1040 switch (im->gdes[ii].gf) {
1044 if (!im->gdes[ii].stack)
1047 value = im->gdes[ii].yrule;
1048 if (isnan(value) || (im->gdes[ii].gf == GF_TICK)) {
1049 /* The time of the data doesn't necessarily match
1050 ** the time of the graph. Beware.
1052 vidx = im->gdes[ii].vidx;
1053 if (im->gdes[vidx].gf == GF_VDEF) {
1054 value = im->gdes[vidx].vf.val;
1055 } else if (((long int)gr_time >= (long int)im->gdes[vidx].start) &&
1056 ((long int)gr_time <= (long int)im->gdes[vidx].end) ) {
1057 value = im->gdes[vidx].data[
1058 (unsigned long) floor(
1059 (double)(gr_time - im->gdes[vidx].start)
1060 / im->gdes[vidx].step)
1061 * im->gdes[vidx].ds_cnt
1069 if (! isnan(value)) {
1071 im->gdes[ii].p_data[i] = paintval;
1072 /* GF_TICK: the data values are not
1073 ** relevant for min and max
1075 if (finite(paintval) && im->gdes[ii].gf != GF_TICK ) {
1076 if (isnan(minval) || paintval < minval)
1078 if (isnan(maxval) || paintval > maxval)
1082 im->gdes[ii].p_data[i] = DNAN;
1091 /* if min or max have not been asigned a value this is because
1092 there was no data in the graph ... this is not good ...
1093 lets set these to dummy values then ... */
1095 if (isnan(minval)) minval = 0.0;
1096 if (isnan(maxval)) maxval = 1.0;
1098 /* adjust min and max values */
1099 if (isnan(im->minval)
1100 /* don't adjust low-end with log scale */
1101 || ((!im->logarithmic && !im->rigid) && im->minval > minval)
1103 im->minval = minval;
1104 if (isnan(im->maxval)
1105 || (!im->rigid && im->maxval < maxval)
1107 if (im->logarithmic)
1108 im->maxval = maxval * 1.1;
1110 im->maxval = maxval;
1112 /* make sure min is smaller than max */
1113 if (im->minval > im->maxval) {
1114 im->minval = 0.99 * im->maxval;
1117 /* make sure min and max are not equal */
1118 if (im->minval == im->maxval) {
1120 if (! im->logarithmic) {
1123 /* make sure min and max are not both zero */
1124 if (im->maxval == 0.0) {
1133 /* identify the point where the first gridline, label ... gets placed */
1137 time_t start, /* what is the initial time */
1138 enum tmt_en baseint, /* what is the basic interval */
1139 long basestep /* how many if these do we jump a time */
1143 localtime_r(&start, &tm);
1146 tm.tm_sec -= tm.tm_sec % basestep; break;
1149 tm.tm_min -= tm.tm_min % basestep;
1154 tm.tm_hour -= tm.tm_hour % basestep; break;
1156 /* we do NOT look at the basestep for this ... */
1159 tm.tm_hour = 0; break;
1161 /* we do NOT look at the basestep for this ... */
1165 tm.tm_mday -= tm.tm_wday -1; /* -1 because we want the monday */
1166 if (tm.tm_wday==0) tm.tm_mday -= 7; /* we want the *previous* monday */
1173 tm.tm_mon -= tm.tm_mon % basestep; break;
1181 tm.tm_year -= (tm.tm_year+1900) % basestep;
1186 /* identify the point where the next gridline, label ... gets placed */
1189 time_t current, /* what is the initial time */
1190 enum tmt_en baseint, /* what is the basic interval */
1191 long basestep /* how many if these do we jump a time */
1196 localtime_r(¤t, &tm);
1200 tm.tm_sec += basestep; break;
1202 tm.tm_min += basestep; break;
1204 tm.tm_hour += basestep; break;
1206 tm.tm_mday += basestep; break;
1208 tm.tm_mday += 7*basestep; break;
1210 tm.tm_mon += basestep; break;
1212 tm.tm_year += basestep;
1214 madetime = mktime(&tm);
1215 } while (madetime == -1); /* this is necessary to skip impssible times
1216 like the daylight saving time skips */
1222 /* calculate values required for PRINT and GPRINT functions */
1225 print_calc(image_desc_t *im, char ***prdata)
1227 long i,ii,validsteps;
1230 int graphelement = 0;
1233 double magfact = -1;
1237 if (im->imginfo) prlines++;
1238 for(i=0;i<im->gdes_c;i++){
1239 switch(im->gdes[i].gf){
1242 if(((*prdata) = rrd_realloc((*prdata),prlines*sizeof(char *)))==NULL){
1243 rrd_set_error("realloc prdata");
1247 /* PRINT and GPRINT can now print VDEF generated values.
1248 * There's no need to do any calculations on them as these
1249 * calculations were already made.
1251 vidx = im->gdes[i].vidx;
1252 if (im->gdes[vidx].gf==GF_VDEF) { /* simply use vals */
1253 printval = im->gdes[vidx].vf.val;
1254 printtime = im->gdes[vidx].vf.when;
1255 } else { /* need to calculate max,min,avg etcetera */
1256 max_ii =((im->gdes[vidx].end
1257 - im->gdes[vidx].start)
1258 / im->gdes[vidx].step
1259 * im->gdes[vidx].ds_cnt);
1262 for( ii=im->gdes[vidx].ds;
1264 ii+=im->gdes[vidx].ds_cnt){
1265 if (! finite(im->gdes[vidx].data[ii]))
1267 if (isnan(printval)){
1268 printval = im->gdes[vidx].data[ii];
1273 switch (im->gdes[i].cf){
1276 case CF_DEVSEASONAL:
1280 printval += im->gdes[vidx].data[ii];
1283 printval = min( printval, im->gdes[vidx].data[ii]);
1287 printval = max( printval, im->gdes[vidx].data[ii]);
1290 printval = im->gdes[vidx].data[ii];
1293 if (im->gdes[i].cf==CF_AVERAGE || im->gdes[i].cf > CF_LAST) {
1294 if (validsteps > 1) {
1295 printval = (printval / validsteps);
1298 } /* prepare printval */
1300 if (!strcmp(im->gdes[i].format,"%c")) { /* VDEF time print */
1301 char ctime_buf[128]; /* PS: for ctime_r, must be >= 26 chars */
1303 ctime_r(&printtime,ctime_buf);
1304 while(isprint(ctime_buf[iii])){iii++;}
1305 ctime_buf[iii]='\0';
1306 if (im->gdes[i].gf == GF_PRINT){
1307 (*prdata)[prlines-2] = malloc((FMT_LEG_LEN+2)*sizeof(char));
1308 sprintf((*prdata)[prlines-2],"%s (%lu)",ctime_buf,printtime);
1309 (*prdata)[prlines-1] = NULL;
1311 sprintf(im->gdes[i].legend,"%s (%lu)",ctime_buf,printtime);
1315 if ((percent_s = strstr(im->gdes[i].format,"%S")) != NULL) {
1316 /* Magfact is set to -1 upon entry to print_calc. If it
1317 * is still less than 0, then we need to run auto_scale.
1318 * Otherwise, put the value into the correct units. If
1319 * the value is 0, then do not set the symbol or magnification
1320 * so next the calculation will be performed again. */
1321 if (magfact < 0.0) {
1322 auto_scale(im,&printval,&si_symb,&magfact);
1323 if (printval == 0.0)
1326 printval /= magfact;
1328 *(++percent_s) = 's';
1329 } else if (strstr(im->gdes[i].format,"%s") != NULL) {
1330 auto_scale(im,&printval,&si_symb,&magfact);
1333 if (im->gdes[i].gf == GF_PRINT){
1334 (*prdata)[prlines-2] = malloc((FMT_LEG_LEN+2)*sizeof(char));
1335 (*prdata)[prlines-1] = NULL;
1336 if (bad_format(im->gdes[i].format)) {
1337 rrd_set_error("bad format for PRINT in '%s'", im->gdes[i].format);
1340 #ifdef HAVE_SNPRINTF
1341 snprintf((*prdata)[prlines-2],FMT_LEG_LEN,im->gdes[i].format,printval,si_symb);
1343 sprintf((*prdata)[prlines-2],im->gdes[i].format,printval,si_symb);
1348 if (bad_format(im->gdes[i].format)) {
1349 rrd_set_error("bad format for GPRINT in '%s'", im->gdes[i].format);
1352 #ifdef HAVE_SNPRINTF
1353 snprintf(im->gdes[i].legend,FMT_LEG_LEN-2,im->gdes[i].format,printval,si_symb);
1355 sprintf(im->gdes[i].legend,im->gdes[i].format,printval,si_symb);
1373 #ifdef WITH_PIECHART
1381 return graphelement;
1385 /* place legends with color spots */
1387 leg_place(image_desc_t *im)
1390 int interleg = im->text_prop[TEXT_PROP_LEGEND].size*2.0;
1391 int border = im->text_prop[TEXT_PROP_LEGEND].size*2.0;
1392 int fill=0, fill_last;
1394 int leg_x = border, leg_y = im->yimg;
1398 char prt_fctn; /*special printfunctions */
1401 if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
1402 if ((legspace = malloc(im->gdes_c*sizeof(int)))==NULL){
1403 rrd_set_error("malloc for legspace");
1407 for(i=0;i<im->gdes_c;i++){
1410 /* hid legends for rules which are not displayed */
1412 if(!(im->extra_flags & FORCE_RULES_LEGEND)) {
1413 if (im->gdes[i].gf == GF_HRULE &&
1414 (im->gdes[i].yrule < im->minval || im->gdes[i].yrule > im->maxval))
1415 im->gdes[i].legend[0] = '\0';
1417 if (im->gdes[i].gf == GF_VRULE &&
1418 (im->gdes[i].xrule < im->start || im->gdes[i].xrule > im->end))
1419 im->gdes[i].legend[0] = '\0';
1422 leg_cc = strlen(im->gdes[i].legend);
1424 /* is there a controle code ant the end of the legend string ? */
1425 /* and it is not a tab \\t */
1426 if (leg_cc >= 2 && im->gdes[i].legend[leg_cc-2] == '\\' && im->gdes[i].legend[leg_cc-1] != 't') {
1427 prt_fctn = im->gdes[i].legend[leg_cc-1];
1429 im->gdes[i].legend[leg_cc] = '\0';
1433 /* remove exess space */
1434 while (prt_fctn=='g' &&
1436 im->gdes[i].legend[leg_cc-1]==' '){
1438 im->gdes[i].legend[leg_cc]='\0';
1441 legspace[i]=(prt_fctn=='g' ? 0 : interleg);
1444 /* no interleg space if string ends in \g */
1445 fill += legspace[i];
1447 fill += gfx_get_text_width(im->canvas, fill+border,
1448 im->text_prop[TEXT_PROP_LEGEND].font,
1449 im->text_prop[TEXT_PROP_LEGEND].size,
1451 im->gdes[i].legend, 0);
1456 /* who said there was a special tag ... ?*/
1457 if (prt_fctn=='g') {
1460 if (prt_fctn == '\0') {
1461 if (i == im->gdes_c -1 ) prt_fctn ='l';
1463 /* is it time to place the legends ? */
1464 if (fill > im->ximg - 2*border){
1479 if (prt_fctn != '\0'){
1481 if (leg_c >= 2 && prt_fctn == 'j') {
1482 glue = (im->ximg - fill - 2* border) / (leg_c-1);
1486 if (prt_fctn =='c') leg_x = (im->ximg - fill) / 2.0;
1487 if (prt_fctn =='r') leg_x = im->ximg - fill - border;
1489 for(ii=mark;ii<=i;ii++){
1490 if(im->gdes[ii].legend[0]=='\0')
1491 continue; /* skip empty legends */
1492 im->gdes[ii].leg_x = leg_x;
1493 im->gdes[ii].leg_y = leg_y;
1495 gfx_get_text_width(im->canvas, leg_x,
1496 im->text_prop[TEXT_PROP_LEGEND].font,
1497 im->text_prop[TEXT_PROP_LEGEND].size,
1499 im->gdes[ii].legend, 0)
1503 leg_y += im->text_prop[TEXT_PROP_LEGEND].size*1.8;
1504 if (prt_fctn == 's') leg_y -= im->text_prop[TEXT_PROP_LEGEND].size;
1516 /* create a grid on the graph. it determines what to do
1517 from the values of xsize, start and end */
1519 /* the xaxis labels are determined from the number of seconds per pixel
1520 in the requested graph */
1525 calc_horizontal_grid(image_desc_t *im)
1531 int decimals, fractionals;
1533 im->ygrid_scale.labfact=2;
1535 range = im->maxval - im->minval;
1536 scaledrange = range / im->magfact;
1538 /* does the scale of this graph make it impossible to put lines
1539 on it? If so, give up. */
1540 if (isnan(scaledrange)) {
1544 /* find grid spaceing */
1546 if(isnan(im->ygridstep)){
1547 if(im->extra_flags & ALTYGRID) {
1548 /* find the value with max number of digits. Get number of digits */
1549 decimals = ceil(log10(max(fabs(im->maxval), fabs(im->minval))*im->viewfactor/im->magfact));
1550 if(decimals <= 0) /* everything is small. make place for zero */
1553 im->ygrid_scale.gridstep = pow((double)10, floor(log10(range*im->viewfactor/im->magfact)))/im->viewfactor*im->magfact;
1555 if(im->ygrid_scale.gridstep == 0) /* range is one -> 0.1 is reasonable scale */
1556 im->ygrid_scale.gridstep = 0.1;
1557 /* should have at least 5 lines but no more then 15 */
1558 if(range/im->ygrid_scale.gridstep < 5)
1559 im->ygrid_scale.gridstep /= 10;
1560 if(range/im->ygrid_scale.gridstep > 15)
1561 im->ygrid_scale.gridstep *= 10;
1562 if(range/im->ygrid_scale.gridstep > 5) {
1563 im->ygrid_scale.labfact = 1;
1564 if(range/im->ygrid_scale.gridstep > 8)
1565 im->ygrid_scale.labfact = 2;
1568 im->ygrid_scale.gridstep /= 5;
1569 im->ygrid_scale.labfact = 5;
1571 fractionals = floor(log10(im->ygrid_scale.gridstep*(double)im->ygrid_scale.labfact*im->viewfactor/im->magfact));
1572 if(fractionals < 0) { /* small amplitude. */
1573 int len = decimals - fractionals + 1;
1574 if (im->unitslength < len+2) im->unitslength = len+2;
1575 sprintf(im->ygrid_scale.labfmt, "%%%d.%df%s", len, -fractionals,(im->symbol != ' ' ? " %c" : ""));
1577 int len = decimals + 1;
1578 if (im->unitslength < len+2) im->unitslength = len+2;
1579 sprintf(im->ygrid_scale.labfmt, "%%%d.0f%s", len, ( im->symbol != ' ' ? " %c" : "" ));
1583 for(i=0;ylab[i].grid > 0;i++){
1584 pixel = im->ysize / (scaledrange / ylab[i].grid);
1592 if (pixel * ylab[gridind].lfac[i] >= 2.5 * im->text_prop[TEXT_PROP_AXIS].size) {
1593 im->ygrid_scale.labfact = ylab[gridind].lfac[i];
1598 im->ygrid_scale.gridstep = ylab[gridind].grid * im->magfact;
1601 im->ygrid_scale.gridstep = im->ygridstep;
1602 im->ygrid_scale.labfact = im->ylabfact;
1607 int draw_horizontal_grid(image_desc_t *im)
1611 char graph_label[100];
1612 double X0=im->xorigin;
1613 double X1=im->xorigin+im->xsize;
1615 int sgrid = (int)( im->minval / im->ygrid_scale.gridstep - 1);
1616 int egrid = (int)( im->maxval / im->ygrid_scale.gridstep + 1);
1618 scaledstep = im->ygrid_scale.gridstep/(double)im->magfact*(double)im->viewfactor;
1619 MaxY = scaledstep*(double)egrid;
1620 for (i = sgrid; i <= egrid; i++){
1621 double Y0=ytr(im,im->ygrid_scale.gridstep*i);
1622 if ( Y0 >= im->yorigin-im->ysize
1623 && Y0 <= im->yorigin){
1624 if(i % im->ygrid_scale.labfact == 0){
1625 if (im->symbol == ' ') {
1626 if(im->extra_flags & ALTYGRID) {
1627 sprintf(graph_label,im->ygrid_scale.labfmt,scaledstep*(double)i);
1630 sprintf(graph_label,"%4.1f",scaledstep*(double)i);
1632 sprintf(graph_label,"%4.0f",scaledstep*(double)i);
1636 char sisym = ( i == 0 ? ' ' : im->symbol);
1637 if(im->extra_flags & ALTYGRID) {
1638 sprintf(graph_label,im->ygrid_scale.labfmt,scaledstep*(double)i,sisym);
1641 sprintf(graph_label,"%4.1f %c",scaledstep*(double)i, sisym);
1643 sprintf(graph_label,"%4.0f %c",scaledstep*(double)i, sisym);
1648 gfx_new_text ( im->canvas,
1649 X0-im->text_prop[TEXT_PROP_AXIS].size, Y0,
1650 im->graph_col[GRC_FONT],
1651 im->text_prop[TEXT_PROP_AXIS].font,
1652 im->text_prop[TEXT_PROP_AXIS].size,
1653 im->tabwidth, 0.0, GFX_H_RIGHT, GFX_V_CENTER,
1655 gfx_new_dashed_line ( im->canvas,
1658 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1659 im->grid_dash_on, im->grid_dash_off);
1661 } else if (!(im->extra_flags & NOMINOR)) {
1662 gfx_new_dashed_line ( im->canvas,
1665 GRIDWIDTH, im->graph_col[GRC_GRID],
1666 im->grid_dash_on, im->grid_dash_off);
1674 /* logaritmic horizontal grid */
1676 horizontal_log_grid(image_desc_t *im)
1680 int minoridx=0, majoridx=0;
1681 char graph_label[100];
1683 double value, pixperstep, minstep;
1685 /* find grid spaceing */
1686 pixpex= (double)im->ysize / (log10(im->maxval) - log10(im->minval));
1688 if (isnan(pixpex)) {
1692 for(i=0;yloglab[i][0] > 0;i++){
1693 minstep = log10(yloglab[i][0]);
1694 for(ii=1;yloglab[i][ii+1] > 0;ii++){
1695 if(yloglab[i][ii+2]==0){
1696 minstep = log10(yloglab[i][ii+1])-log10(yloglab[i][ii]);
1700 pixperstep = pixpex * minstep;
1701 if(pixperstep > 5){minoridx = i;}
1702 if(pixperstep > 2 * im->text_prop[TEXT_PROP_LEGEND].size){majoridx = i;}
1706 X1=im->xorigin+im->xsize;
1707 /* paint minor grid */
1708 for (value = pow((double)10, log10(im->minval)
1709 - fmod(log10(im->minval),log10(yloglab[minoridx][0])));
1710 value <= im->maxval;
1711 value *= yloglab[minoridx][0]){
1712 if (value < im->minval) continue;
1714 while(yloglab[minoridx][++i] > 0){
1715 Y0 = ytr(im,value * yloglab[minoridx][i]);
1716 if (Y0 <= im->yorigin - im->ysize) break;
1717 gfx_new_dashed_line ( im->canvas,
1720 GRIDWIDTH, im->graph_col[GRC_GRID],
1721 im->grid_dash_on, im->grid_dash_off);
1725 /* paint major grid and labels*/
1726 for (value = pow((double)10, log10(im->minval)
1727 - fmod(log10(im->minval),log10(yloglab[majoridx][0])));
1728 value <= im->maxval;
1729 value *= yloglab[majoridx][0]){
1730 if (value < im->minval) continue;
1732 while(yloglab[majoridx][++i] > 0){
1733 Y0 = ytr(im,value * yloglab[majoridx][i]);
1734 if (Y0 <= im->yorigin - im->ysize) break;
1735 gfx_new_dashed_line ( im->canvas,
1738 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1739 im->grid_dash_on, im->grid_dash_off);
1741 sprintf(graph_label,"%3.0e",value * yloglab[majoridx][i]);
1742 gfx_new_text ( im->canvas,
1743 X0-im->text_prop[TEXT_PROP_AXIS].size, Y0,
1744 im->graph_col[GRC_FONT],
1745 im->text_prop[TEXT_PROP_AXIS].font,
1746 im->text_prop[TEXT_PROP_AXIS].size,
1747 im->tabwidth,0.0, GFX_H_RIGHT, GFX_V_CENTER,
1759 int xlab_sel; /* which sort of label and grid ? */
1760 time_t ti, tilab, timajor;
1762 char graph_label[100];
1763 double X0,Y0,Y1; /* points for filled graph and more*/
1766 /* the type of time grid is determined by finding
1767 the number of seconds per pixel in the graph */
1770 if(im->xlab_user.minsec == -1){
1771 factor=(im->end - im->start)/im->xsize;
1773 while ( xlab[xlab_sel+1].minsec != -1
1774 && xlab[xlab_sel+1].minsec <= factor) { xlab_sel++; } /* pick the last one */
1775 while ( xlab[xlab_sel-1].minsec == xlab[xlab_sel].minsec
1776 && xlab[xlab_sel].length > (im->end - im->start)) { xlab_sel--; } /* go back to the smallest size */
1777 im->xlab_user.gridtm = xlab[xlab_sel].gridtm;
1778 im->xlab_user.gridst = xlab[xlab_sel].gridst;
1779 im->xlab_user.mgridtm = xlab[xlab_sel].mgridtm;
1780 im->xlab_user.mgridst = xlab[xlab_sel].mgridst;
1781 im->xlab_user.labtm = xlab[xlab_sel].labtm;
1782 im->xlab_user.labst = xlab[xlab_sel].labst;
1783 im->xlab_user.precis = xlab[xlab_sel].precis;
1784 im->xlab_user.stst = xlab[xlab_sel].stst;
1787 /* y coords are the same for every line ... */
1789 Y1 = im->yorigin-im->ysize;
1792 /* paint the minor grid */
1793 if (!(im->extra_flags & NOMINOR))
1795 for(ti = find_first_time(im->start,
1796 im->xlab_user.gridtm,
1797 im->xlab_user.gridst),
1798 timajor = find_first_time(im->start,
1799 im->xlab_user.mgridtm,
1800 im->xlab_user.mgridst);
1802 ti = find_next_time(ti,im->xlab_user.gridtm,im->xlab_user.gridst)
1804 /* are we inside the graph ? */
1805 if (ti < im->start || ti > im->end) continue;
1806 while (timajor < ti) {
1807 timajor = find_next_time(timajor,
1808 im->xlab_user.mgridtm, im->xlab_user.mgridst);
1810 if (ti == timajor) continue; /* skip as falls on major grid line */
1812 gfx_new_dashed_line(im->canvas,X0,Y0+1, X0,Y1-1,GRIDWIDTH,
1813 im->graph_col[GRC_GRID],
1814 im->grid_dash_on, im->grid_dash_off);
1819 /* paint the major grid */
1820 for(ti = find_first_time(im->start,
1821 im->xlab_user.mgridtm,
1822 im->xlab_user.mgridst);
1824 ti = find_next_time(ti,im->xlab_user.mgridtm,im->xlab_user.mgridst)
1826 /* are we inside the graph ? */
1827 if (ti < im->start || ti > im->end) continue;
1829 gfx_new_dashed_line(im->canvas,X0,Y0+3, X0,Y1-2,MGRIDWIDTH,
1830 im->graph_col[GRC_MGRID],
1831 im->grid_dash_on, im->grid_dash_off);
1834 /* paint the labels below the graph */
1835 for(ti = find_first_time(im->start - im->xlab_user.precis/2,
1836 im->xlab_user.labtm,
1837 im->xlab_user.labst);
1838 ti <= im->end - im->xlab_user.precis/2;
1839 ti = find_next_time(ti,im->xlab_user.labtm,im->xlab_user.labst)
1841 tilab= ti + im->xlab_user.precis/2; /* correct time for the label */
1842 /* are we inside the graph ? */
1843 if (tilab < im->start || tilab > im->end) continue;
1846 localtime_r(&tilab, &tm);
1847 strftime(graph_label,99,im->xlab_user.stst, &tm);
1849 # error "your libc has no strftime I guess we'll abort the exercise here."
1851 gfx_new_text ( im->canvas,
1852 xtr(im,tilab), Y0+im->text_prop[TEXT_PROP_AXIS].size*1.4+5,
1853 im->graph_col[GRC_FONT],
1854 im->text_prop[TEXT_PROP_AXIS].font,
1855 im->text_prop[TEXT_PROP_AXIS].size,
1856 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_BOTTOM,
1869 /* draw x and y axis */
1870 /* gfx_new_line ( im->canvas, im->xorigin+im->xsize,im->yorigin,
1871 im->xorigin+im->xsize,im->yorigin-im->ysize,
1872 GRIDWIDTH, im->graph_col[GRC_AXIS]);
1874 gfx_new_line ( im->canvas, im->xorigin,im->yorigin-im->ysize,
1875 im->xorigin+im->xsize,im->yorigin-im->ysize,
1876 GRIDWIDTH, im->graph_col[GRC_AXIS]); */
1878 gfx_new_line ( im->canvas, im->xorigin-4,im->yorigin,
1879 im->xorigin+im->xsize+4,im->yorigin,
1880 MGRIDWIDTH, im->graph_col[GRC_AXIS]);
1882 gfx_new_line ( im->canvas, im->xorigin,im->yorigin+4,
1883 im->xorigin,im->yorigin-im->ysize-4,
1884 MGRIDWIDTH, im->graph_col[GRC_AXIS]);
1887 /* arrow for X and Y axis direction */
1888 gfx_new_area ( im->canvas,
1889 im->xorigin+im->xsize+2, im->yorigin-2,
1890 im->xorigin+im->xsize+2, im->yorigin+3,
1891 im->xorigin+im->xsize+7, im->yorigin+0.5, /* LINEOFFSET */
1892 im->graph_col[GRC_ARROW]);
1894 gfx_new_area ( im->canvas,
1895 im->xorigin-2, im->yorigin-im->ysize-2,
1896 im->xorigin+3, im->yorigin-im->ysize-2,
1897 im->xorigin+0.5, im->yorigin-im->ysize-7, /* LINEOFFSET */
1898 im->graph_col[GRC_ARROW]);
1903 grid_paint(image_desc_t *im)
1907 double X0,Y0; /* points for filled graph and more*/
1910 /* draw 3d border */
1911 node = gfx_new_area (im->canvas, 0,im->yimg,
1913 2,2,im->graph_col[GRC_SHADEA]);
1914 gfx_add_point( node , im->ximg - 2, 2 );
1915 gfx_add_point( node , im->ximg, 0 );
1916 gfx_add_point( node , 0,0 );
1917 /* gfx_add_point( node , 0,im->yimg ); */
1919 node = gfx_new_area (im->canvas, 2,im->yimg-2,
1920 im->ximg-2,im->yimg-2,
1922 im->graph_col[GRC_SHADEB]);
1923 gfx_add_point( node , im->ximg,0);
1924 gfx_add_point( node , im->ximg,im->yimg);
1925 gfx_add_point( node , 0,im->yimg);
1926 /* gfx_add_point( node , 0,im->yimg ); */
1929 if (im->draw_x_grid == 1 )
1932 if (im->draw_y_grid == 1){
1933 if(im->logarithmic){
1934 res = horizontal_log_grid(im);
1936 res = draw_horizontal_grid(im);
1939 /* dont draw horizontal grid if there is no min and max val */
1941 char *nodata = "No Data found";
1942 gfx_new_text(im->canvas,im->ximg/2, (2*im->yorigin-im->ysize) / 2,
1943 im->graph_col[GRC_FONT],
1944 im->text_prop[TEXT_PROP_AXIS].font,
1945 im->text_prop[TEXT_PROP_AXIS].size,
1946 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_CENTER,
1951 /* yaxis unit description */
1952 gfx_new_text( im->canvas,
1953 10, (im->yorigin - im->ysize/2),
1954 im->graph_col[GRC_FONT],
1955 im->text_prop[TEXT_PROP_UNIT].font,
1956 im->text_prop[TEXT_PROP_UNIT].size, im->tabwidth,
1957 RRDGRAPH_YLEGEND_ANGLE,
1958 GFX_H_LEFT, GFX_V_CENTER,
1962 gfx_new_text( im->canvas,
1963 im->ximg/2, im->text_prop[TEXT_PROP_TITLE].size*1.3+4,
1964 im->graph_col[GRC_FONT],
1965 im->text_prop[TEXT_PROP_TITLE].font,
1966 im->text_prop[TEXT_PROP_TITLE].size, im->tabwidth, 0.0,
1967 GFX_H_CENTER, GFX_V_CENTER,
1969 /* rrdtool 'logo' */
1970 gfx_new_text( im->canvas,
1972 ( im->graph_col[GRC_FONT] & 0xffffff00 ) | 0x00000044,
1973 im->text_prop[TEXT_PROP_AXIS].font,
1974 5.5, im->tabwidth, 270,
1975 GFX_H_RIGHT, GFX_V_TOP,
1976 "RRDTOOL / TOBI OETIKER");
1979 if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
1980 for(i=0;i<im->gdes_c;i++){
1981 if(im->gdes[i].legend[0] =='\0')
1984 /* im->gdes[i].leg_y is the bottom of the legend */
1985 X0 = im->gdes[i].leg_x;
1986 Y0 = im->gdes[i].leg_y;
1987 gfx_new_text ( im->canvas, X0, Y0,
1988 im->graph_col[GRC_FONT],
1989 im->text_prop[TEXT_PROP_LEGEND].font,
1990 im->text_prop[TEXT_PROP_LEGEND].size,
1991 im->tabwidth,0.0, GFX_H_LEFT, GFX_V_BOTTOM,
1992 im->gdes[i].legend );
1993 /* The legend for GRAPH items starts with "M " to have
1994 enough space for the box */
1995 if ( im->gdes[i].gf != GF_PRINT &&
1996 im->gdes[i].gf != GF_GPRINT &&
1997 im->gdes[i].gf != GF_COMMENT) {
2000 boxH = gfx_get_text_width(im->canvas, 0,
2001 im->text_prop[TEXT_PROP_LEGEND].font,
2002 im->text_prop[TEXT_PROP_LEGEND].size,
2003 im->tabwidth,"o", 0) * 1.2;
2006 /* make sure transparent colors show up the same way as in the graph */
2007 node = gfx_new_area(im->canvas,
2011 im->graph_col[GRC_BACK]);
2012 gfx_add_point ( node, X0+boxH, Y0-boxV );
2014 node = gfx_new_area(im->canvas,
2019 gfx_add_point ( node, X0+boxH, Y0-boxV );
2020 node = gfx_new_line(im->canvas,
2023 1.0,im->graph_col[GRC_FRAME]);
2024 gfx_add_point(node,X0+boxH,Y0);
2025 gfx_add_point(node,X0+boxH,Y0-boxV);
2026 gfx_close_path(node);
2033 /*****************************************************
2034 * lazy check make sure we rely need to create this graph
2035 *****************************************************/
2037 int lazy_check(image_desc_t *im){
2040 struct stat imgstat;
2042 if (im->lazy == 0) return 0; /* no lazy option */
2043 if (stat(im->graphfile,&imgstat) != 0)
2044 return 0; /* can't stat */
2045 /* one pixel in the existing graph is more then what we would
2047 if (time(NULL) - imgstat.st_mtime >
2048 (im->end - im->start) / im->xsize)
2050 if ((fd = fopen(im->graphfile,"rb")) == NULL)
2051 return 0; /* the file does not exist */
2052 switch (im->canvas->imgformat) {
2054 size = PngSize(fd,&(im->ximg),&(im->yimg));
2063 #ifdef WITH_PIECHART
2065 pie_part(image_desc_t *im, gfx_color_t color,
2066 double PieCenterX, double PieCenterY, double Radius,
2067 double startangle, double endangle)
2071 double step=M_PI/50; /* Number of iterations for the circle;
2072 ** 10 is definitely too low, more than
2073 ** 50 seems to be overkill
2076 /* Strange but true: we have to work clockwise or else
2077 ** anti aliasing nor transparency don't work.
2079 ** This test is here to make sure we do it right, also
2080 ** this makes the for...next loop more easy to implement.
2081 ** The return will occur if the user enters a negative number
2082 ** (which shouldn't be done according to the specs) or if the
2083 ** programmers do something wrong (which, as we all know, never
2084 ** happens anyway :)
2086 if (endangle<startangle) return;
2088 /* Hidden feature: Radius decreases each full circle */
2090 while (angle>=2*M_PI) {
2095 node=gfx_new_area(im->canvas,
2096 PieCenterX+sin(startangle)*Radius,
2097 PieCenterY-cos(startangle)*Radius,
2100 PieCenterX+sin(endangle)*Radius,
2101 PieCenterY-cos(endangle)*Radius,
2103 for (angle=endangle;angle-startangle>=step;angle-=step) {
2105 PieCenterX+sin(angle)*Radius,
2106 PieCenterY-cos(angle)*Radius );
2113 graph_size_location(image_desc_t *im, int elements
2115 #ifdef WITH_PIECHART
2121 /* The actual size of the image to draw is determined from
2122 ** several sources. The size given on the command line is
2123 ** the graph area but we need more as we have to draw labels
2124 ** and other things outside the graph area
2127 /* +-+-------------------------------------------+
2128 ** |l|.................title.....................|
2129 ** |e+--+-------------------------------+--------+
2132 ** |l| l| main graph area | chart |
2135 ** |r+--+-------------------------------+--------+
2136 ** |e| | x-axis labels | |
2137 ** |v+--+-------------------------------+--------+
2138 ** | |..............legends......................|
2139 ** +-+-------------------------------------------+
2145 #ifdef WITH_PIECHART
2150 Xlegend =0, Ylegend =0,
2152 Xspacing =15, Yspacing =15;
2154 if (im->extra_flags & ONLY_GRAPH) {
2156 im->ximg = im->xsize;
2157 im->yimg = im->ysize;
2158 im->yorigin = im->ysize;
2163 if (im->ylegend[0] != '\0' ) {
2164 Xvertical = im->text_prop[TEXT_PROP_UNIT].size *2;
2168 if (im->title[0] != '\0') {
2169 /* The title is placed "inbetween" two text lines so it
2170 ** automatically has some vertical spacing. The horizontal
2171 ** spacing is added here, on each side.
2173 /* don't care for the with of the title
2174 Xtitle = gfx_get_text_width(im->canvas, 0,
2175 im->text_prop[TEXT_PROP_TITLE].font,
2176 im->text_prop[TEXT_PROP_TITLE].size,
2178 im->title, 0) + 2*Xspacing; */
2179 Ytitle = im->text_prop[TEXT_PROP_TITLE].size*2.6+10;
2185 if (im->draw_x_grid) {
2186 Yxlabel=im->text_prop[TEXT_PROP_AXIS].size *2.5;
2188 if (im->draw_y_grid) {
2189 Xylabel=gfx_get_text_width(im->canvas, 0,
2190 im->text_prop[TEXT_PROP_AXIS].font,
2191 im->text_prop[TEXT_PROP_AXIS].size,
2193 "0", 0) * im->unitslength;
2197 #ifdef WITH_PIECHART
2199 im->piesize=im->xsize<im->ysize?im->xsize:im->ysize;
2205 /* Now calculate the total size. Insert some spacing where
2206 desired. im->xorigin and im->yorigin need to correspond
2207 with the lower left corner of the main graph area or, if
2208 this one is not set, the imaginary box surrounding the
2211 /* The legend width cannot yet be determined, as a result we
2212 ** have problems adjusting the image to it. For now, we just
2213 ** forget about it at all; the legend will have to fit in the
2214 ** size already allocated.
2216 im->ximg = Xylabel + Xmain + 2 * Xspacing;
2218 #ifdef WITH_PIECHART
2222 if (Xmain) im->ximg += Xspacing;
2223 #ifdef WITH_PIECHART
2224 if (Xpie) im->ximg += Xspacing;
2227 im->xorigin = Xspacing + Xylabel;
2229 /* the length of the title should not influence with width of the graph
2230 if (Xtitle > im->ximg) im->ximg = Xtitle; */
2232 if (Xvertical) { /* unit description */
2233 im->ximg += Xvertical;
2234 im->xorigin += Xvertical;
2238 /* The vertical size is interesting... we need to compare
2239 ** the sum of {Ytitle, Ymain, Yxlabel, Ylegend} with Yvertical
2240 ** however we need to know {Ytitle+Ymain+Yxlabel} in order to
2241 ** start even thinking about Ylegend.
2243 ** Do it in three portions: First calculate the inner part,
2244 ** then do the legend, then adjust the total height of the img.
2247 /* reserve space for main and/or pie */
2249 im->yimg = Ymain + Yxlabel;
2251 #ifdef WITH_PIECHART
2252 if (im->yimg < Ypie) im->yimg = Ypie;
2255 im->yorigin = im->yimg - Yxlabel;
2257 /* reserve space for the title *or* some padding above the graph */
2260 im->yorigin += Ytitle;
2262 im->yimg += 1.5*Yspacing;
2263 im->yorigin += 1.5*Yspacing;
2265 /* reserve space for padding below the graph */
2266 im->yimg += Yspacing;
2268 /* Determine where to place the legends onto the image.
2269 ** Adjust im->yimg to match the space requirements.
2271 if(leg_place(im)==-1)
2276 if (Xlegend > im->ximg) {
2278 /* reposition Pie */
2282 #ifdef WITH_PIECHART
2283 /* The pie is placed in the upper right hand corner,
2284 ** just below the title (if any) and with sufficient
2288 im->pie_x = im->ximg - Xspacing - Xpie/2;
2289 im->pie_y = im->yorigin-Ymain+Ypie/2;
2291 im->pie_x = im->ximg/2;
2292 im->pie_y = im->yorigin-Ypie/2;
2300 /* from http://www.cygnus-software.com/papers/comparingfloats/comparingfloats.htm */
2301 /* yes we are loosing precision by doing tos with floats instead of doubles
2302 but it seems more stable this way. */
2304 static int AlmostEqual2sComplement (float A, float B, int maxUlps)
2307 int aInt = *(int*)&A;
2308 int bInt = *(int*)&B;
2310 /* Make sure maxUlps is non-negative and small enough that the
2311 default NAN won't compare as equal to anything. */
2313 /* assert(maxUlps > 0 && maxUlps < 4 * 1024 * 1024); */
2315 /* Make aInt lexicographically ordered as a twos-complement int */
2318 aInt = 0x80000000l - aInt;
2320 /* Make bInt lexicographically ordered as a twos-complement int */
2323 bInt = 0x80000000l - bInt;
2325 intDiff = abs(aInt - bInt);
2327 if (intDiff <= maxUlps)
2333 /* draw that picture thing ... */
2335 graph_paint(image_desc_t *im, char ***calcpr)
2338 int lazy = lazy_check(im);
2339 #ifdef WITH_PIECHART
2341 double PieStart=0.0;
2346 double areazero = 0.0;
2347 enum gf_en stack_gf = GF_PRINT;
2348 graph_desc_t *lastgdes = NULL;
2350 /* if we are lazy and there is nothing to PRINT ... quit now */
2351 if (lazy && im->prt_c==0) return 0;
2353 /* pull the data from the rrd files ... */
2355 if(data_fetch(im)==-1)
2358 /* evaluate VDEF and CDEF operations ... */
2359 if(data_calc(im)==-1)
2362 #ifdef WITH_PIECHART
2363 /* check if we need to draw a piechart */
2364 for(i=0;i<im->gdes_c;i++){
2365 if (im->gdes[i].gf == GF_PART) {
2372 /* calculate and PRINT and GPRINT definitions. We have to do it at
2373 * this point because it will affect the length of the legends
2374 * if there are no graph elements we stop here ...
2375 * if we are lazy, try to quit ...
2377 i=print_calc(im,calcpr);
2380 #ifdef WITH_PIECHART
2383 ) || lazy) return 0;
2385 #ifdef WITH_PIECHART
2386 /* If there's only the pie chart to draw, signal this */
2387 if (i==0) piechart=2;
2390 /* get actual drawing data and find min and max values*/
2391 if(data_proc(im)==-1)
2394 if(!im->logarithmic){si_unit(im);} /* identify si magnitude Kilo, Mega Giga ? */
2396 if(!im->rigid && ! im->logarithmic)
2397 expand_range(im); /* make sure the upper and lower limit are
2400 if (!calc_horizontal_grid(im))
2407 /**************************************************************
2408 *** Calculating sizes and locations became a bit confusing ***
2409 *** so I moved this into a separate function. ***
2410 **************************************************************/
2411 if(graph_size_location(im,i
2412 #ifdef WITH_PIECHART
2418 /* the actual graph is created by going through the individual
2419 graph elements and then drawing them */
2421 node=gfx_new_area ( im->canvas,
2425 im->graph_col[GRC_BACK]);
2427 gfx_add_point(node,im->ximg, 0);
2429 #ifdef WITH_PIECHART
2430 if (piechart != 2) {
2432 node=gfx_new_area ( im->canvas,
2433 im->xorigin, im->yorigin,
2434 im->xorigin + im->xsize, im->yorigin,
2435 im->xorigin + im->xsize, im->yorigin-im->ysize,
2436 im->graph_col[GRC_CANVAS]);
2438 gfx_add_point(node,im->xorigin, im->yorigin - im->ysize);
2440 if (im->minval > 0.0)
2441 areazero = im->minval;
2442 if (im->maxval < 0.0)
2443 areazero = im->maxval;
2444 #ifdef WITH_PIECHART
2448 #ifdef WITH_PIECHART
2450 pie_part(im,im->graph_col[GRC_CANVAS],im->pie_x,im->pie_y,im->piesize*0.5,0,2*M_PI);
2454 for(i=0;i<im->gdes_c;i++){
2455 switch(im->gdes[i].gf){
2468 for (ii = 0; ii < im->xsize; ii++)
2470 if (!isnan(im->gdes[i].p_data[ii]) &&
2471 im->gdes[i].p_data[ii] > 0.0)
2473 /* generate a tick */
2474 gfx_new_line(im->canvas, im -> xorigin + ii,
2475 im -> yorigin - (im -> gdes[i].yrule * im -> ysize),
2479 im -> gdes[i].col );
2485 stack_gf = im->gdes[i].gf;
2487 /* fix data points at oo and -oo */
2488 for(ii=0;ii<im->xsize;ii++){
2489 if (isinf(im->gdes[i].p_data[ii])){
2490 if (im->gdes[i].p_data[ii] > 0) {
2491 im->gdes[i].p_data[ii] = im->maxval ;
2493 im->gdes[i].p_data[ii] = im->minval ;
2499 /* *******************************************************
2504 -------|--t-1--t--------------------------------
2506 if we know the value at time t was a then
2507 we draw a square from t-1 to t with the value a.
2509 ********************************************************* */
2510 if (im->gdes[i].col != 0x0){
2511 /* GF_LINE and friend */
2512 if(stack_gf == GF_LINE ){
2515 for(ii=1;ii<im->xsize;ii++){
2516 if (isnan(im->gdes[i].p_data[ii]) || (im->slopemode==1 && isnan(im->gdes[i].p_data[ii-1]))){
2520 if ( node == NULL ) {
2521 last_y = ytr(im,im->gdes[i].p_data[ii]);
2522 if ( im->slopemode == 0 ){
2523 node = gfx_new_line(im->canvas,
2524 ii-1+im->xorigin,last_y,
2525 ii+im->xorigin,last_y,
2526 im->gdes[i].linewidth,
2529 node = gfx_new_line(im->canvas,
2530 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii-1]),
2531 ii+im->xorigin,last_y,
2532 im->gdes[i].linewidth,
2536 double new_y = ytr(im,im->gdes[i].p_data[ii]);
2537 if ( im->slopemode==0 && ! AlmostEqual2sComplement(new_y,last_y,4)){
2538 gfx_add_point(node,ii-1+im->xorigin,new_y);
2541 gfx_add_point(node,ii+im->xorigin,new_y);
2547 double *foreY=malloc(sizeof(double)*im->xsize*2);
2548 double *foreX=malloc(sizeof(double)*im->xsize*2);
2549 double *backY=malloc(sizeof(double)*im->xsize*2);
2550 double *backX=malloc(sizeof(double)*im->xsize*2);
2552 for(ii=0;ii<=im->xsize;ii++){
2554 if ( idxI > 0 && ( drawem != 0 || ii==im->xsize)){
2557 while (cntI < idxI && AlmostEqual2sComplement(foreY[lastI],foreY[cntI],4) && AlmostEqual2sComplement(foreY[lastI],foreY[cntI+1],4)){cntI++;}
2558 node = gfx_new_area(im->canvas,
2561 foreX[cntI],foreY[cntI], im->gdes[i].col);
2562 while (cntI < idxI) {
2565 while ( cntI < idxI && AlmostEqual2sComplement(foreY[lastI],foreY[cntI],4) && AlmostEqual2sComplement(foreY[lastI],foreY[cntI+1],4)){cntI++;}
2566 gfx_add_point(node,foreX[cntI],foreY[cntI]);
2568 gfx_add_point(node,backX[idxI],backY[idxI]);
2572 while ( idxI > 1 && AlmostEqual2sComplement(backY[lastI], backY[idxI],4) && AlmostEqual2sComplement(backY[lastI],backY[idxI-1],4)){idxI--;}
2573 gfx_add_point(node,backX[idxI],backY[idxI]);
2582 if (ii == im->xsize) break;
2584 /* keep things simple for now, just draw these bars
2585 do not try to build a big and complex area */
2588 if ( im->slopemode == 0 && ii==0){
2591 if ( isnan(im->gdes[i].p_data[ii]) ) {
2595 ytop = ytr(im,im->gdes[i].p_data[ii]);
2596 if ( lastgdes && im->gdes[i].stack ) {
2597 ybase = ytr(im,lastgdes->p_data[ii]);
2599 ybase = ytr(im,areazero);
2601 if ( ybase == ytop ){
2605 /* every area has to be wound clock-wise,
2606 so we have to make sur base remains base */
2608 double extra = ytop;
2612 if ( im->slopemode == 0 ){
2613 backY[++idxI] = ybase-0.2;
2614 backX[idxI] = ii+im->xorigin-1;
2615 foreY[idxI] = ytop+0.2;
2616 foreX[idxI] = ii+im->xorigin-1;
2618 backY[++idxI] = ybase-0.2;
2619 backX[idxI] = ii+im->xorigin;
2620 foreY[idxI] = ytop+0.2;
2621 foreX[idxI] = ii+im->xorigin;
2623 /* close up any remaining area */
2628 } /* else GF_LINE */
2629 } /* if color != 0x0 */
2630 /* make sure we do not run into trouble when stacking on NaN */
2631 for(ii=0;ii<im->xsize;ii++){
2632 if (isnan(im->gdes[i].p_data[ii])) {
2633 if (lastgdes && (im->gdes[i].stack)) {
2634 im->gdes[i].p_data[ii] = lastgdes->p_data[ii];
2636 im->gdes[i].p_data[ii] = areazero;
2640 lastgdes = &(im->gdes[i]);
2642 #ifdef WITH_PIECHART
2644 if(isnan(im->gdes[i].yrule)) /* fetch variable */
2645 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2647 if (finite(im->gdes[i].yrule)) { /* even the fetched var can be NaN */
2648 pie_part(im,im->gdes[i].col,
2649 im->pie_x,im->pie_y,im->piesize*0.4,
2650 M_PI*2.0*PieStart/100.0,
2651 M_PI*2.0*(PieStart+im->gdes[i].yrule)/100.0);
2652 PieStart += im->gdes[i].yrule;
2659 #ifdef WITH_PIECHART
2667 /* grid_paint also does the text */
2668 if( !(im->extra_flags & ONLY_GRAPH) )
2672 if( !(im->extra_flags & ONLY_GRAPH) )
2675 /* the RULES are the last thing to paint ... */
2676 for(i=0;i<im->gdes_c;i++){
2678 switch(im->gdes[i].gf){
2680 if(isnan(im->gdes[i].yrule)) { /* fetch variable */
2681 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2683 if(im->gdes[i].yrule >= im->minval
2684 && im->gdes[i].yrule <= im->maxval)
2685 gfx_new_line(im->canvas,
2686 im->xorigin,ytr(im,im->gdes[i].yrule),
2687 im->xorigin+im->xsize,ytr(im,im->gdes[i].yrule),
2688 1.0,im->gdes[i].col);
2691 if(im->gdes[i].xrule == 0) { /* fetch variable */
2692 im->gdes[i].xrule = im->gdes[im->gdes[i].vidx].vf.when;
2694 if(im->gdes[i].xrule >= im->start
2695 && im->gdes[i].xrule <= im->end)
2696 gfx_new_line(im->canvas,
2697 xtr(im,im->gdes[i].xrule),im->yorigin,
2698 xtr(im,im->gdes[i].xrule),im->yorigin-im->ysize,
2699 1.0,im->gdes[i].col);
2707 if (strcmp(im->graphfile,"-")==0) {
2708 fo = im->graphhandle ? im->graphhandle : stdout;
2709 #if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
2710 /* Change translation mode for stdout to BINARY */
2711 _setmode( _fileno( fo ), O_BINARY );
2714 if ((fo = fopen(im->graphfile,"wb")) == NULL) {
2715 rrd_set_error("Opening '%s' for write: %s",im->graphfile,
2716 rrd_strerror(errno));
2720 gfx_render (im->canvas,im->ximg,im->yimg,0x00000000,fo);
2721 if (strcmp(im->graphfile,"-") != 0)
2727 /*****************************************************
2729 *****************************************************/
2732 gdes_alloc(image_desc_t *im){
2735 if ((im->gdes = (graph_desc_t *) rrd_realloc(im->gdes, (im->gdes_c)
2736 * sizeof(graph_desc_t)))==NULL){
2737 rrd_set_error("realloc graph_descs");
2742 im->gdes[im->gdes_c-1].step=im->step;
2743 im->gdes[im->gdes_c-1].step_orig=im->step;
2744 im->gdes[im->gdes_c-1].stack=0;
2745 im->gdes[im->gdes_c-1].debug=0;
2746 im->gdes[im->gdes_c-1].start=im->start;
2747 im->gdes[im->gdes_c-1].end=im->end;
2748 im->gdes[im->gdes_c-1].vname[0]='\0';
2749 im->gdes[im->gdes_c-1].data=NULL;
2750 im->gdes[im->gdes_c-1].ds_namv=NULL;
2751 im->gdes[im->gdes_c-1].data_first=0;
2752 im->gdes[im->gdes_c-1].p_data=NULL;
2753 im->gdes[im->gdes_c-1].rpnp=NULL;
2754 im->gdes[im->gdes_c-1].shift=0;
2755 im->gdes[im->gdes_c-1].col = 0x0;
2756 im->gdes[im->gdes_c-1].legend[0]='\0';
2757 im->gdes[im->gdes_c-1].format[0]='\0';
2758 im->gdes[im->gdes_c-1].rrd[0]='\0';
2759 im->gdes[im->gdes_c-1].ds=-1;
2760 im->gdes[im->gdes_c-1].p_data=NULL;
2761 im->gdes[im->gdes_c-1].yrule=DNAN;
2762 im->gdes[im->gdes_c-1].xrule=0;
2766 /* copies input untill the first unescaped colon is found
2767 or until input ends. backslashes have to be escaped as well */
2769 scan_for_col(const char *const input, int len, char *const output)
2774 input[inp] != ':' &&
2777 if (input[inp] == '\\' &&
2778 input[inp+1] != '\0' &&
2779 (input[inp+1] == '\\' ||
2780 input[inp+1] == ':')){
2781 output[outp++] = input[++inp];
2784 output[outp++] = input[inp];
2787 output[outp] = '\0';
2790 /* Some surgery done on this function, it became ridiculously big.
2792 ** - initializing now in rrd_graph_init()
2793 ** - options parsing now in rrd_graph_options()
2794 ** - script parsing now in rrd_graph_script()
2797 rrd_graph(int argc, char **argv, char ***prdata, int *xsize, int *ysize, FILE *stream, double *ymin, double *ymax)
2800 rrd_graph_init(&im);
2801 im.graphhandle = stream;
2803 rrd_graph_options(argc,argv,&im);
2804 if (rrd_test_error()) {
2809 if (strlen(argv[optind])>=MAXPATH) {
2810 rrd_set_error("filename (including path) too long");
2814 strncpy(im.graphfile,argv[optind],MAXPATH-1);
2815 im.graphfile[MAXPATH-1]='\0';
2817 rrd_graph_script(argc,argv,&im,1);
2818 if (rrd_test_error()) {
2823 /* Everything is now read and the actual work can start */
2826 if (graph_paint(&im,prdata)==-1){
2831 /* The image is generated and needs to be output.
2832 ** Also, if needed, print a line with information about the image.
2842 /* maybe prdata is not allocated yet ... lets do it now */
2843 if ((*prdata = calloc(2,sizeof(char *)))==NULL) {
2844 rrd_set_error("malloc imginfo");
2848 if(((*prdata)[0] = malloc((strlen(im.imginfo)+200+strlen(im.graphfile))*sizeof(char)))
2850 rrd_set_error("malloc imginfo");
2853 filename=im.graphfile+strlen(im.graphfile);
2854 while(filename > im.graphfile) {
2855 if (*(filename-1)=='/' || *(filename-1)=='\\' ) break;
2859 sprintf((*prdata)[0],im.imginfo,filename,(long)(im.canvas->zoom*im.ximg),(long)(im.canvas->zoom*im.yimg));
2866 rrd_graph_init(image_desc_t *im)
2873 #ifdef HAVE_SETLOCALE
2874 setlocale(LC_TIME,"");
2879 im->xlab_user.minsec = -1;
2885 im->ylegend[0] = '\0';
2886 im->title[0] = '\0';
2889 im->unitsexponent= 9999;
2892 im->viewfactor = 1.0;
2899 im->logarithmic = 0;
2900 im->ygridstep = DNAN;
2901 im->draw_x_grid = 1;
2902 im->draw_y_grid = 1;
2907 im->canvas = gfx_new_canvas();
2908 im->grid_dash_on = 1;
2909 im->grid_dash_off = 1;
2910 im->tabwidth = 40.0;
2912 for(i=0;i<DIM(graph_col);i++)
2913 im->graph_col[i]=graph_col[i];
2915 #if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
2918 char rrd_win_default_font[1000];
2919 windir = getenv("windir");
2920 /* %windir% is something like D:\windows or C:\winnt */
2921 if (windir != NULL) {
2922 strncpy(rrd_win_default_font,windir,999);
2923 rrd_win_default_font[999] = '\0';
2924 strcat(rrd_win_default_font,"\\fonts\\");
2925 strcat(rrd_win_default_font,RRD_DEFAULT_FONT);
2926 for(i=0;i<DIM(text_prop);i++){
2927 strncpy(text_prop[i].font,rrd_win_default_font,sizeof(text_prop[i].font)-1);
2928 text_prop[i].font[sizeof(text_prop[i].font)-1] = '\0';
2935 deffont = getenv("RRD_DEFAULT_FONT");
2936 if (deffont != NULL) {
2937 for(i=0;i<DIM(text_prop);i++){
2938 strncpy(text_prop[i].font,deffont,sizeof(text_prop[i].font)-1);
2939 text_prop[i].font[sizeof(text_prop[i].font)-1] = '\0';
2943 for(i=0;i<DIM(text_prop);i++){
2944 im->text_prop[i].size = text_prop[i].size;
2945 strcpy(im->text_prop[i].font,text_prop[i].font);
2950 rrd_graph_options(int argc, char *argv[],image_desc_t *im)
2953 char *parsetime_error = NULL;
2954 char scan_gtm[12],scan_mtm[12],scan_ltm[12],col_nam[12];
2955 time_t start_tmp=0,end_tmp=0;
2957 struct rrd_time_value start_tv, end_tv;
2959 optind = 0; opterr = 0; /* initialize getopt */
2961 parsetime("end-24h", &start_tv);
2962 parsetime("now", &end_tv);
2965 static struct option long_options[] =
2967 {"start", required_argument, 0, 's'},
2968 {"end", required_argument, 0, 'e'},
2969 {"x-grid", required_argument, 0, 'x'},
2970 {"y-grid", required_argument, 0, 'y'},
2971 {"vertical-label",required_argument,0,'v'},
2972 {"width", required_argument, 0, 'w'},
2973 {"height", required_argument, 0, 'h'},
2974 {"interlaced", no_argument, 0, 'i'},
2975 {"upper-limit",required_argument, 0, 'u'},
2976 {"lower-limit",required_argument, 0, 'l'},
2977 {"rigid", no_argument, 0, 'r'},
2978 {"base", required_argument, 0, 'b'},
2979 {"logarithmic",no_argument, 0, 'o'},
2980 {"color", required_argument, 0, 'c'},
2981 {"font", required_argument, 0, 'n'},
2982 {"title", required_argument, 0, 't'},
2983 {"imginfo", required_argument, 0, 'f'},
2984 {"imgformat", required_argument, 0, 'a'},
2985 {"lazy", no_argument, 0, 'z'},
2986 {"zoom", required_argument, 0, 'm'},
2987 {"no-legend", no_argument, 0, 'g'},
2988 {"force-rules-legend",no_argument,0, 'F'},
2989 {"only-graph", no_argument, 0, 'j'},
2990 {"alt-y-grid", no_argument, 0, 'Y'},
2991 {"no-minor", no_argument, 0, 'I'},
2992 {"slope-mode", no_argument, 0, 'E'},
2993 {"alt-autoscale", no_argument, 0, 'A'},
2994 {"alt-autoscale-max", no_argument, 0, 'M'},
2995 {"no-gridfit", no_argument, 0, 'N'},
2996 {"units-exponent",required_argument, 0, 'X'},
2997 {"units-length",required_argument, 0, 'L'},
2998 {"step", required_argument, 0, 'S'},
2999 {"tabwidth", required_argument, 0, 'T'},
3000 {"font-render-mode", required_argument, 0, 'R'},
3001 {"font-smoothing-threshold", required_argument, 0, 'B'},
3002 {"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 */
3004 int option_index = 0;
3006 int col_start,col_end;
3008 opt = getopt_long(argc, argv,
3009 "s:e:x:y:v:w:h:iu:l:rb:oc:n:m:t:f:a:I:zgjFYAMEX:L:S:T:NR:B:",
3010 long_options, &option_index);
3017 im->extra_flags |= NOMINOR;
3020 im->extra_flags |= ALTYGRID;
3023 im->extra_flags |= ALTAUTOSCALE;
3026 im->extra_flags |= ALTAUTOSCALE_MAX;
3029 im->extra_flags |= ONLY_GRAPH;
3032 im->extra_flags |= NOLEGEND;
3035 im->extra_flags |= FORCE_RULES_LEGEND;
3038 im->unitsexponent = atoi(optarg);
3041 im->unitslength = atoi(optarg);
3044 im->tabwidth = atof(optarg);
3047 im->step = atoi(optarg);
3053 if ((parsetime_error = parsetime(optarg, &start_tv))) {
3054 rrd_set_error( "start time: %s", parsetime_error );
3059 if ((parsetime_error = parsetime(optarg, &end_tv))) {
3060 rrd_set_error( "end time: %s", parsetime_error );
3065 if(strcmp(optarg,"none") == 0){
3071 "%10[A-Z]:%ld:%10[A-Z]:%ld:%10[A-Z]:%ld:%ld:%n",
3073 &im->xlab_user.gridst,
3075 &im->xlab_user.mgridst,
3077 &im->xlab_user.labst,
3078 &im->xlab_user.precis,
3079 &stroff) == 7 && stroff != 0){
3080 strncpy(im->xlab_form, optarg+stroff, sizeof(im->xlab_form) - 1);
3081 im->xlab_form[sizeof(im->xlab_form)-1] = '\0';
3082 if((int)(im->xlab_user.gridtm = tmt_conv(scan_gtm)) == -1){
3083 rrd_set_error("unknown keyword %s",scan_gtm);
3085 } else if ((int)(im->xlab_user.mgridtm = tmt_conv(scan_mtm)) == -1){
3086 rrd_set_error("unknown keyword %s",scan_mtm);
3088 } else if ((int)(im->xlab_user.labtm = tmt_conv(scan_ltm)) == -1){
3089 rrd_set_error("unknown keyword %s",scan_ltm);
3092 im->xlab_user.minsec = 1;
3093 im->xlab_user.stst = im->xlab_form;
3095 rrd_set_error("invalid x-grid format");
3101 if(strcmp(optarg,"none") == 0){
3109 &im->ylabfact) == 2) {
3110 if(im->ygridstep<=0){
3111 rrd_set_error("grid step must be > 0");
3113 } else if (im->ylabfact < 1){
3114 rrd_set_error("label factor must be > 0");
3118 rrd_set_error("invalid y-grid format");
3123 strncpy(im->ylegend,optarg,150);
3124 im->ylegend[150]='\0';
3127 im->maxval = atof(optarg);
3130 im->minval = atof(optarg);
3133 im->base = atol(optarg);
3134 if(im->base != 1024 && im->base != 1000 ){
3135 rrd_set_error("the only sensible value for base apart from 1000 is 1024");
3140 long_tmp = atol(optarg);
3141 if (long_tmp < 10) {
3142 rrd_set_error("width below 10 pixels");
3145 im->xsize = long_tmp;
3148 long_tmp = atol(optarg);
3149 if (long_tmp < 10) {
3150 rrd_set_error("height below 10 pixels");
3153 im->ysize = long_tmp;
3156 im->canvas->interlaced = 1;
3162 im->imginfo = optarg;
3165 if((int)(im->canvas->imgformat = if_conv(optarg)) == -1) {
3166 rrd_set_error("unsupported graphics format '%s'",optarg);
3178 im->logarithmic = 1;
3179 if (isnan(im->minval))
3184 "%10[A-Z]#%n%8lx%n",
3185 col_nam,&col_start,&color,&col_end) == 2){
3187 int col_len = col_end - col_start;
3191 ((color & 0xF00) * 0x110000) |
3192 ((color & 0x0F0) * 0x011000) |
3193 ((color & 0x00F) * 0x001100) |
3199 ((color & 0xF000) * 0x11000) |
3200 ((color & 0x0F00) * 0x01100) |
3201 ((color & 0x00F0) * 0x00110) |
3202 ((color & 0x000F) * 0x00011)
3206 color = (color << 8) + 0xff /* shift left by 8 */;
3211 rrd_set_error("the color format is #RRGGBB[AA]");
3214 if((ci=grc_conv(col_nam)) != -1){
3215 im->graph_col[ci]=color;
3217 rrd_set_error("invalid color name '%s'",col_nam);
3221 rrd_set_error("invalid color def format");
3228 char font[1024] = "";
3231 "%10[A-Z]:%lf:%1000s",
3232 prop,&size,font) >= 2){
3234 if((sindex=text_prop_conv(prop)) != -1){
3235 for (propidx=sindex;propidx<TEXT_PROP_LAST;propidx++){
3237 im->text_prop[propidx].size=size;
3239 if (strlen(font) > 0){
3240 strcpy(im->text_prop[propidx].font,font);
3242 if (propidx==sindex && sindex != 0) break;
3245 rrd_set_error("invalid fonttag '%s'",prop);
3249 rrd_set_error("invalid text property format");
3255 im->canvas->zoom = atof(optarg);
3256 if (im->canvas->zoom <= 0.0) {
3257 rrd_set_error("zoom factor must be > 0");
3262 strncpy(im->title,optarg,150);
3263 im->title[150]='\0';
3267 if ( strcmp( optarg, "normal" ) == 0 )
3268 im->canvas->aa_type = AA_NORMAL;
3269 else if ( strcmp( optarg, "light" ) == 0 )
3270 im->canvas->aa_type = AA_LIGHT;
3271 else if ( strcmp( optarg, "mono" ) == 0 )
3272 im->canvas->aa_type = AA_NONE;
3275 rrd_set_error("unknown font-render-mode '%s'", optarg );
3281 im->canvas->font_aa_threshold = atof(optarg);
3286 rrd_set_error("unknown option '%c'", optopt);
3288 rrd_set_error("unknown option '%s'",argv[optind-1]);
3293 if (optind >= argc) {
3294 rrd_set_error("missing filename");
3298 if (im->logarithmic == 1 && (im->minval <= 0 || isnan(im->minval))){
3299 rrd_set_error("for a logarithmic yaxis you must specify a lower-limit > 0");
3303 if (proc_start_end(&start_tv,&end_tv,&start_tmp,&end_tmp) == -1){
3304 /* error string is set in parsetime.c */
3308 if (start_tmp < 3600*24*365*10){
3309 rrd_set_error("the first entry to fetch should be after 1980 (%ld)",start_tmp);
3313 if (end_tmp < start_tmp) {
3314 rrd_set_error("start (%ld) should be less than end (%ld)",
3315 start_tmp, end_tmp);
3319 im->start = start_tmp;
3321 im->step = max((long)im->step, (im->end-im->start)/im->xsize);
3325 rrd_graph_check_vname(image_desc_t *im, char *varname, char *err)
3327 if ((im->gdes[im->gdes_c-1].vidx=find_var(im,varname))==-1) {
3328 rrd_set_error("Unknown variable '%s' in %s",varname,err);
3334 rrd_graph_color(image_desc_t *im, char *var, char *err, int optional)
3337 graph_desc_t *gdp=&im->gdes[im->gdes_c-1];
3339 color=strstr(var,"#");
3342 rrd_set_error("Found no color in %s",err);
3351 rest=strstr(color,":");
3359 sscanf(color,"#%6lx%n",&col,&n);
3360 col = (col << 8) + 0xff /* shift left by 8 */;
3361 if (n!=7) rrd_set_error("Color problem in %s",err);
3364 sscanf(color,"#%8lx%n",&col,&n);
3367 rrd_set_error("Color problem in %s",err);
3369 if (rrd_test_error()) return 0;
3376 int bad_format(char *fmt) {
3380 while (*ptr != '\0')
3381 if (*ptr++ == '%') {
3383 /* line cannot end with percent char */
3384 if (*ptr == '\0') return 1;
3386 /* '%s', '%S' and '%%' are allowed */
3387 if (*ptr == 's' || *ptr == 'S' || *ptr == '%') ptr++;
3389 /* %c is allowed (but use only with vdef!) */
3390 else if (*ptr == 'c') {
3395 /* or else '% 6.2lf' and such are allowed */
3397 /* optional padding character */
3398 if (*ptr == ' ' || *ptr == '+' || *ptr == '-') ptr++;
3400 /* This should take care of 'm.n' with all three optional */
3401 while (*ptr >= '0' && *ptr <= '9') ptr++;
3402 if (*ptr == '.') ptr++;
3403 while (*ptr >= '0' && *ptr <= '9') ptr++;
3405 /* Either 'le', 'lf' or 'lg' must follow here */
3406 if (*ptr++ != 'l') return 1;
3407 if (*ptr == 'e' || *ptr == 'f' || *ptr == 'g') ptr++;
3418 vdef_parse(gdes,str)
3419 struct graph_desc_t *gdes;
3420 const char *const str;
3422 /* A VDEF currently is either "func" or "param,func"
3423 * so the parsing is rather simple. Change if needed.
3430 sscanf(str,"%le,%29[A-Z]%n",¶m,func,&n);
3431 if (n== (int)strlen(str)) { /* matched */
3435 sscanf(str,"%29[A-Z]%n",func,&n);
3436 if (n== (int)strlen(str)) { /* matched */
3439 rrd_set_error("Unknown function string '%s' in VDEF '%s'"
3446 if (!strcmp("PERCENT",func)) gdes->vf.op = VDEF_PERCENT;
3447 else if (!strcmp("MAXIMUM",func)) gdes->vf.op = VDEF_MAXIMUM;
3448 else if (!strcmp("AVERAGE",func)) gdes->vf.op = VDEF_AVERAGE;
3449 else if (!strcmp("MINIMUM",func)) gdes->vf.op = VDEF_MINIMUM;
3450 else if (!strcmp("TOTAL", func)) gdes->vf.op = VDEF_TOTAL;
3451 else if (!strcmp("FIRST", func)) gdes->vf.op = VDEF_FIRST;
3452 else if (!strcmp("LAST", func)) gdes->vf.op = VDEF_LAST;
3453 else if (!strcmp("LSLSLOPE", func)) gdes->vf.op = VDEF_LSLSLOPE;
3454 else if (!strcmp("LSLINT", func)) gdes->vf.op = VDEF_LSLINT;
3455 else if (!strcmp("LSLCORREL",func)) gdes->vf.op = VDEF_LSLCORREL;
3457 rrd_set_error("Unknown function '%s' in VDEF '%s'\n"
3464 switch (gdes->vf.op) {
3466 if (isnan(param)) { /* no parameter given */
3467 rrd_set_error("Function '%s' needs parameter in VDEF '%s'\n"
3473 if (param>=0.0 && param<=100.0) {
3474 gdes->vf.param = param;
3475 gdes->vf.val = DNAN; /* undefined */
3476 gdes->vf.when = 0; /* undefined */
3478 rrd_set_error("Parameter '%f' out of range in VDEF '%s'\n"
3493 case VDEF_LSLCORREL:
3495 gdes->vf.param = DNAN;
3496 gdes->vf.val = DNAN;
3499 rrd_set_error("Function '%s' needs no parameter in VDEF '%s'\n"
3516 graph_desc_t *src,*dst;
3520 dst = &im->gdes[gdi];
3521 src = &im->gdes[dst->vidx];
3522 data = src->data + src->ds;
3523 steps = (src->end - src->start) / src->step;
3526 printf("DEBUG: start == %lu, end == %lu, %lu steps\n"
3533 switch (dst->vf.op) {
3534 case VDEF_PERCENT: {
3535 rrd_value_t * array;
3539 if ((array = malloc(steps*sizeof(double)))==NULL) {
3540 rrd_set_error("malloc VDEV_PERCENT");
3543 for (step=0;step < steps; step++) {
3544 array[step]=data[step*src->ds_cnt];
3546 qsort(array,step,sizeof(double),vdef_percent_compar);
3548 field = (steps-1)*dst->vf.param/100;
3549 dst->vf.val = array[field];
3550 dst->vf.when = 0; /* no time component */
3553 for(step=0;step<steps;step++)
3554 printf("DEBUG: %3li:%10.2f %c\n",step,array[step],step==field?'*':' ');
3560 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3561 if (step == steps) {
3565 dst->vf.val = data[step*src->ds_cnt];
3566 dst->vf.when = src->start + (step+1)*src->step;
3568 while (step != steps) {
3569 if (finite(data[step*src->ds_cnt])) {
3570 if (data[step*src->ds_cnt] > dst->vf.val) {
3571 dst->vf.val = data[step*src->ds_cnt];
3572 dst->vf.when = src->start + (step+1)*src->step;
3579 case VDEF_AVERAGE: {
3582 for (step=0;step<steps;step++) {
3583 if (finite(data[step*src->ds_cnt])) {
3584 sum += data[step*src->ds_cnt];
3589 if (dst->vf.op == VDEF_TOTAL) {
3590 dst->vf.val = sum*src->step;
3591 dst->vf.when = cnt*src->step; /* not really "when" */
3593 dst->vf.val = sum/cnt;
3594 dst->vf.when = 0; /* no time component */
3604 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3605 if (step == steps) {
3609 dst->vf.val = data[step*src->ds_cnt];
3610 dst->vf.when = src->start + (step+1)*src->step;
3612 while (step != steps) {
3613 if (finite(data[step*src->ds_cnt])) {
3614 if (data[step*src->ds_cnt] < dst->vf.val) {
3615 dst->vf.val = data[step*src->ds_cnt];
3616 dst->vf.when = src->start + (step+1)*src->step;
3623 /* The time value returned here is one step before the
3624 * actual time value. This is the start of the first
3628 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3629 if (step == steps) { /* all entries were NaN */
3633 dst->vf.val = data[step*src->ds_cnt];
3634 dst->vf.when = src->start + step*src->step;
3638 /* The time value returned here is the
3639 * actual time value. This is the end of the last
3643 while (step >= 0 && isnan(data[step*src->ds_cnt])) step--;
3644 if (step < 0) { /* all entries were NaN */
3648 dst->vf.val = data[step*src->ds_cnt];
3649 dst->vf.when = src->start + (step+1)*src->step;
3654 case VDEF_LSLCORREL:{
3655 /* Bestfit line by linear least squares method */
3658 double SUMx, SUMy, SUMxy, SUMxx, SUMyy, slope, y_intercept, correl ;
3659 SUMx = 0; SUMy = 0; SUMxy = 0; SUMxx = 0; SUMyy = 0;
3661 for (step=0;step<steps;step++) {
3662 if (finite(data[step*src->ds_cnt])) {
3665 SUMxx += step * step;
3666 SUMxy += step * data[step*src->ds_cnt];
3667 SUMy += data[step*src->ds_cnt];
3668 SUMyy += data[step*src->ds_cnt]*data[step*src->ds_cnt];
3672 slope = ( SUMx*SUMy - cnt*SUMxy ) / ( SUMx*SUMx - cnt*SUMxx );
3673 y_intercept = ( SUMy - slope*SUMx ) / cnt;
3674 correl = (SUMxy - (SUMx*SUMy)/cnt) / sqrt((SUMxx - (SUMx*SUMx)/cnt)*(SUMyy - (SUMy*SUMy)/cnt));
3677 if (dst->vf.op == VDEF_LSLSLOPE) {
3678 dst->vf.val = slope;
3679 dst->vf.when = cnt*src->step;
3680 } else if (dst->vf.op == VDEF_LSLINT) {
3681 dst->vf.val = y_intercept;
3682 dst->vf.when = cnt*src->step;
3683 } else if (dst->vf.op == VDEF_LSLCORREL) {
3684 dst->vf.val = correl;
3685 dst->vf.when = cnt*src->step;
3698 /* NaN < -INF < finite_values < INF */
3700 vdef_percent_compar(a,b)
3703 /* Equality is not returned; this doesn't hurt except
3704 * (maybe) for a little performance.
3707 /* First catch NaN values. They are smallest */
3708 if (isnan( *(double *)a )) return -1;
3709 if (isnan( *(double *)b )) return 1;
3711 /* NaN doesn't reach this part so INF and -INF are extremes.
3712 * The sign from isinf() is compatible with the sign we return
3714 if (isinf( *(double *)a )) return isinf( *(double *)a );
3715 if (isinf( *(double *)b )) return isinf( *(double *)b );
3717 /* If we reach this, both values must be finite */
3718 if ( *(double *)a < *(double *)b ) return -1; else return 1;