1 /****************************************************************************
2 * RRDtool 1.2.9 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, TMT_SECOND,30, TMT_MINUTE,5, TMT_MINUTE,5, 0,"%H:%M"},
46 {2, TMT_MINUTE,1, TMT_MINUTE,5, TMT_MINUTE,5, 0,"%H:%M"},
47 {5, TMT_MINUTE,2, TMT_MINUTE,10, TMT_MINUTE,10, 0,"%H:%M"},
48 {10, TMT_MINUTE,5, TMT_MINUTE,20, TMT_MINUTE,20, 0,"%H:%M"},
49 {30, TMT_MINUTE,10, TMT_HOUR,1, TMT_HOUR,1, 0,"%H:%M"},
50 {60, TMT_MINUTE,30, TMT_HOUR,2, TMT_HOUR,2, 0,"%H:%M"},
51 {180, TMT_HOUR,1, TMT_HOUR,6, TMT_HOUR,6, 0,"%H:%M"},
52 /*{300, TMT_HOUR,3, TMT_HOUR,12, TMT_HOUR,12, 12*3600,"%a %p"}, this looks silly*/
53 {600, TMT_HOUR,6, TMT_DAY,1, TMT_DAY,1, 24*3600,"%a"},
54 {1800, TMT_HOUR,12, TMT_DAY,1, TMT_DAY,2, 24*3600,"%a"},
55 {3600, TMT_DAY,1, TMT_WEEK,1, TMT_WEEK,1, 7*24*3600,"Week %V"},
56 {3*3600, TMT_WEEK,1, TMT_MONTH,1, TMT_WEEK,2, 7*24*3600,"Week %V"},
57 {6*3600, TMT_MONTH,1, TMT_MONTH,1, TMT_MONTH,1, 30*24*3600,"%b"},
58 {48*3600, TMT_MONTH,1, TMT_MONTH,3, TMT_MONTH,3, 30*24*3600,"%b"},
59 {10*24*3600, TMT_YEAR,1, TMT_YEAR,1, TMT_YEAR,1, 365*24*3600,"%y"},
60 {-1,TMT_MONTH,0,TMT_MONTH,0,TMT_MONTH,0,0,""}
63 /* sensible logarithmic y label intervals ...
64 the first element of each row defines the possible starting points on the
65 y axis ... the other specify the */
67 double yloglab[][12]= {{ 1e9, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
68 { 1e3, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
69 { 1e1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
70 /* { 1e1, 1, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, */
71 { 1e1, 1, 2.5, 5, 7.5, 0, 0, 0, 0, 0, 0, 0 },
72 { 1e1, 1, 2, 4, 6, 8, 0, 0, 0, 0, 0, 0 },
73 { 1e1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0 },
74 { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }};
76 /* sensible y label intervals ...*/
94 gfx_color_t graph_col[] = /* default colors */
95 { 0xFFFFFFFF, /* canvas */
96 0xF0F0F0FF, /* background */
97 0xD0D0D0FF, /* shade A */
98 0xA0A0A0FF, /* shade B */
99 0x90909080, /* grid */
100 0xE0505080, /* major grid */
101 0x000000FF, /* font */
102 0x802020FF, /* arrow */
103 0x202020FF, /* axis */
104 0x000000FF /* frame */
111 # define DPRINT(x) (void)(printf x, printf("\n"))
117 /* initialize with xtr(im,0); */
119 xtr(image_desc_t *im,time_t mytime){
122 pixie = (double) im->xsize / (double)(im->end - im->start);
125 return (int)((double)im->xorigin
126 + pixie * ( mytime - im->start ) );
129 /* translate data values into y coordinates */
131 ytr(image_desc_t *im, double value){
136 pixie = (double) im->ysize / (im->maxval - im->minval);
138 pixie = (double) im->ysize / (log10(im->maxval) - log10(im->minval));
140 } else if(!im->logarithmic) {
141 yval = im->yorigin - pixie * (value - im->minval);
143 if (value < im->minval) {
146 yval = im->yorigin - pixie * (log10(value) - log10(im->minval));
149 /* make sure we don't return anything too unreasonable. GD lib can
150 get terribly slow when drawing lines outside its scope. This is
151 especially problematic in connection with the rigid option */
153 /* keep yval as-is */
154 } else if (yval > im->yorigin) {
155 yval = im->yorigin +0.00001;
156 } else if (yval < im->yorigin - im->ysize){
157 yval = im->yorigin - im->ysize - 0.00001;
164 /* conversion function for symbolic entry names */
167 #define conv_if(VV,VVV) \
168 if (strcmp(#VV, string) == 0) return VVV ;
170 enum gf_en gf_conv(char *string){
172 conv_if(PRINT,GF_PRINT)
173 conv_if(GPRINT,GF_GPRINT)
174 conv_if(COMMENT,GF_COMMENT)
175 conv_if(HRULE,GF_HRULE)
176 conv_if(VRULE,GF_VRULE)
177 conv_if(LINE,GF_LINE)
178 conv_if(AREA,GF_AREA)
179 conv_if(STACK,GF_STACK)
180 conv_if(TICK,GF_TICK)
182 conv_if(CDEF,GF_CDEF)
183 conv_if(VDEF,GF_VDEF)
185 conv_if(PART,GF_PART)
187 conv_if(XPORT,GF_XPORT)
188 conv_if(SHIFT,GF_SHIFT)
193 enum gfx_if_en if_conv(char *string){
203 enum tmt_en tmt_conv(char *string){
205 conv_if(SECOND,TMT_SECOND)
206 conv_if(MINUTE,TMT_MINUTE)
207 conv_if(HOUR,TMT_HOUR)
209 conv_if(WEEK,TMT_WEEK)
210 conv_if(MONTH,TMT_MONTH)
211 conv_if(YEAR,TMT_YEAR)
215 enum grc_en grc_conv(char *string){
217 conv_if(BACK,GRC_BACK)
218 conv_if(CANVAS,GRC_CANVAS)
219 conv_if(SHADEA,GRC_SHADEA)
220 conv_if(SHADEB,GRC_SHADEB)
221 conv_if(GRID,GRC_GRID)
222 conv_if(MGRID,GRC_MGRID)
223 conv_if(FONT,GRC_FONT)
224 conv_if(ARROW,GRC_ARROW)
225 conv_if(AXIS,GRC_AXIS)
226 conv_if(FRAME,GRC_FRAME)
231 enum text_prop_en text_prop_conv(char *string){
233 conv_if(DEFAULT,TEXT_PROP_DEFAULT)
234 conv_if(TITLE,TEXT_PROP_TITLE)
235 conv_if(AXIS,TEXT_PROP_AXIS)
236 conv_if(UNIT,TEXT_PROP_UNIT)
237 conv_if(LEGEND,TEXT_PROP_LEGEND)
245 im_free(image_desc_t *im)
249 if (im == NULL) return 0;
250 for(i=0;i<(unsigned)im->gdes_c;i++){
251 if (im->gdes[i].data_first){
252 /* careful here, because a single pointer can occur several times */
253 free (im->gdes[i].data);
254 if (im->gdes[i].ds_namv){
255 for (ii=0;ii<im->gdes[i].ds_cnt;ii++)
256 free(im->gdes[i].ds_namv[ii]);
257 free(im->gdes[i].ds_namv);
260 free (im->gdes[i].p_data);
261 free (im->gdes[i].rpnp);
264 gfx_destroy(im->canvas);
268 /* find SI magnitude symbol for the given number*/
271 image_desc_t *im, /* image description */
278 char *symbol[] = {"a", /* 10e-18 Atto */
279 "f", /* 10e-15 Femto */
280 "p", /* 10e-12 Pico */
281 "n", /* 10e-9 Nano */
282 "u", /* 10e-6 Micro */
283 "m", /* 10e-3 Milli */
288 "T", /* 10e12 Tera */
289 "P", /* 10e15 Peta */
295 if (*value == 0.0 || isnan(*value) ) {
299 sindex = floor(log(fabs(*value))/log((double)im->base));
300 *magfact = pow((double)im->base, (double)sindex);
301 (*value) /= (*magfact);
303 if ( sindex <= symbcenter && sindex >= -symbcenter) {
304 (*symb_ptr) = symbol[sindex+symbcenter];
312 /* find SI magnitude symbol for the numbers on the y-axis*/
315 image_desc_t *im /* image description */
319 char symbol[] = {'a', /* 10e-18 Atto */
320 'f', /* 10e-15 Femto */
321 'p', /* 10e-12 Pico */
322 'n', /* 10e-9 Nano */
323 'u', /* 10e-6 Micro */
324 'm', /* 10e-3 Milli */
329 'T', /* 10e12 Tera */
330 'P', /* 10e15 Peta */
334 double digits,viewdigits=0;
336 digits = floor( log( max( fabs(im->minval),fabs(im->maxval)))/log((double)im->base));
338 if (im->unitsexponent != 9999) {
339 /* unitsexponent = 9, 6, 3, 0, -3, -6, -9, etc */
340 viewdigits = floor(im->unitsexponent / 3);
345 im->magfact = pow((double)im->base , digits);
348 printf("digits %6.3f im->magfact %6.3f\n",digits,im->magfact);
351 im->viewfactor = im->magfact / pow((double)im->base , viewdigits);
353 pow((double)im->base , viewdigits);
355 if ( ((viewdigits+symbcenter) < sizeof(symbol)) &&
356 ((viewdigits+symbcenter) >= 0) )
357 im->symbol = symbol[(int)viewdigits+symbcenter];
362 /* move min and max values around to become sensible */
365 expand_range(image_desc_t *im)
367 double sensiblevalues[] ={1000.0,900.0,800.0,750.0,700.0,
368 600.0,500.0,400.0,300.0,250.0,
369 200.0,125.0,100.0,90.0,80.0,
370 75.0,70.0,60.0,50.0,40.0,30.0,
371 25.0,20.0,10.0,9.0,8.0,
372 7.0,6.0,5.0,4.0,3.5,3.0,
373 2.5,2.0,1.8,1.5,1.2,1.0,
374 0.8,0.7,0.6,0.5,0.4,0.3,0.2,0.1,0.0,-1};
376 double scaled_min,scaled_max;
383 printf("Min: %6.2f Max: %6.2f MagFactor: %6.2f\n",
384 im->minval,im->maxval,im->magfact);
387 if (isnan(im->ygridstep)){
388 if(im->extra_flags & ALTAUTOSCALE) {
389 /* measure the amplitude of the function. Make sure that
390 graph boundaries are slightly higher then max/min vals
391 so we can see amplitude on the graph */
394 delt = im->maxval - im->minval;
396 fact = 2.0 * pow(10.0,
397 floor(log10(max(fabs(im->minval), fabs(im->maxval))/im->magfact)) - 2);
399 adj = (fact - delt) * 0.55;
401 printf("Min: %6.2f Max: %6.2f delt: %6.2f fact: %6.2f adj: %6.2f\n", im->minval, im->maxval, delt, fact, adj);
407 else if(im->extra_flags & ALTAUTOSCALE_MAX) {
408 /* measure the amplitude of the function. Make sure that
409 graph boundaries are slightly higher than max vals
410 so we can see amplitude on the graph */
411 adj = (im->maxval - im->minval) * 0.1;
415 scaled_min = im->minval / im->magfact;
416 scaled_max = im->maxval / im->magfact;
418 for (i=1; sensiblevalues[i] > 0; i++){
419 if (sensiblevalues[i-1]>=scaled_min &&
420 sensiblevalues[i]<=scaled_min)
421 im->minval = sensiblevalues[i]*(im->magfact);
423 if (-sensiblevalues[i-1]<=scaled_min &&
424 -sensiblevalues[i]>=scaled_min)
425 im->minval = -sensiblevalues[i-1]*(im->magfact);
427 if (sensiblevalues[i-1] >= scaled_max &&
428 sensiblevalues[i] <= scaled_max)
429 im->maxval = sensiblevalues[i-1]*(im->magfact);
431 if (-sensiblevalues[i-1]<=scaled_max &&
432 -sensiblevalues[i] >=scaled_max)
433 im->maxval = -sensiblevalues[i]*(im->magfact);
437 /* adjust min and max to the grid definition if there is one */
438 im->minval = (double)im->ylabfact * im->ygridstep *
439 floor(im->minval / ((double)im->ylabfact * im->ygridstep));
440 im->maxval = (double)im->ylabfact * im->ygridstep *
441 ceil(im->maxval /( (double)im->ylabfact * im->ygridstep));
445 fprintf(stderr,"SCALED Min: %6.2f Max: %6.2f Factor: %6.2f\n",
446 im->minval,im->maxval,im->magfact);
451 apply_gridfit(image_desc_t *im)
453 if (isnan(im->minval) || isnan(im->maxval))
456 if (im->logarithmic) {
457 double ya, yb, ypix, ypixfrac;
458 double log10_range = log10(im->maxval) - log10(im->minval);
459 ya = pow((double)10, floor(log10(im->minval)));
460 while (ya < im->minval)
463 return; /* don't have y=10^x gridline */
465 if (yb <= im->maxval) {
466 /* we have at least 2 y=10^x gridlines.
467 Make sure distance between them in pixels
468 are an integer by expanding im->maxval */
469 double y_pixel_delta = ytr(im, ya) - ytr(im, yb);
470 double factor = y_pixel_delta / floor(y_pixel_delta);
471 double new_log10_range = factor * log10_range;
472 double new_ymax_log10 = log10(im->minval) + new_log10_range;
473 im->maxval = pow(10, new_ymax_log10);
474 ytr(im, DNAN); /* reset precalc */
475 log10_range = log10(im->maxval) - log10(im->minval);
477 /* make sure first y=10^x gridline is located on
478 integer pixel position by moving scale slightly
479 downwards (sub-pixel movement) */
480 ypix = ytr(im, ya) + im->ysize; /* add im->ysize so it always is positive */
481 ypixfrac = ypix - floor(ypix);
482 if (ypixfrac > 0 && ypixfrac < 1) {
483 double yfrac = ypixfrac / im->ysize;
484 im->minval = pow(10, log10(im->minval) - yfrac * log10_range);
485 im->maxval = pow(10, log10(im->maxval) - yfrac * log10_range);
486 ytr(im, DNAN); /* reset precalc */
489 /* Make sure we have an integer pixel distance between
490 each minor gridline */
491 double ypos1 = ytr(im, im->minval);
492 double ypos2 = ytr(im, im->minval + im->ygrid_scale.gridstep);
493 double y_pixel_delta = ypos1 - ypos2;
494 double factor = y_pixel_delta / floor(y_pixel_delta);
495 double new_range = factor * (im->maxval - im->minval);
496 double gridstep = im->ygrid_scale.gridstep;
497 double minor_y, minor_y_px, minor_y_px_frac;
498 im->maxval = im->minval + new_range;
499 ytr(im, DNAN); /* reset precalc */
500 /* make sure first minor gridline is on integer pixel y coord */
501 minor_y = gridstep * floor(im->minval / gridstep);
502 while (minor_y < im->minval)
504 minor_y_px = ytr(im, minor_y) + im->ysize; /* ensure > 0 by adding ysize */
505 minor_y_px_frac = minor_y_px - floor(minor_y_px);
506 if (minor_y_px_frac > 0 && minor_y_px_frac < 1) {
507 double yfrac = minor_y_px_frac / im->ysize;
508 double range = im->maxval - im->minval;
509 im->minval = im->minval - yfrac * range;
510 im->maxval = im->maxval - yfrac * range;
511 ytr(im, DNAN); /* reset precalc */
513 calc_horizontal_grid(im); /* recalc with changed im->maxval */
517 /* reduce data reimplementation by Alex */
521 enum cf_en cf, /* which consolidation function ?*/
522 unsigned long cur_step, /* step the data currently is in */
523 time_t *start, /* start, end and step as requested ... */
524 time_t *end, /* ... by the application will be ... */
525 unsigned long *step, /* ... adjusted to represent reality */
526 unsigned long *ds_cnt, /* number of data sources in file */
527 rrd_value_t **data) /* two dimensional array containing the data */
529 int i,reduce_factor = ceil((double)(*step) / (double)cur_step);
530 unsigned long col,dst_row,row_cnt,start_offset,end_offset,skiprows=0;
531 rrd_value_t *srcptr,*dstptr;
533 (*step) = cur_step*reduce_factor; /* set new step size for reduced data */
536 row_cnt = ((*end)-(*start))/cur_step;
542 printf("Reducing %lu rows with factor %i time %lu to %lu, step %lu\n",
543 row_cnt,reduce_factor,*start,*end,cur_step);
544 for (col=0;col<row_cnt;col++) {
545 printf("time %10lu: ",*start+(col+1)*cur_step);
546 for (i=0;i<*ds_cnt;i++)
547 printf(" %8.2e",srcptr[*ds_cnt*col+i]);
552 /* We have to combine [reduce_factor] rows of the source
553 ** into one row for the destination. Doing this we also
554 ** need to take care to combine the correct rows. First
555 ** alter the start and end time so that they are multiples
556 ** of the new step time. We cannot reduce the amount of
557 ** time so we have to move the end towards the future and
558 ** the start towards the past.
560 end_offset = (*end) % (*step);
561 start_offset = (*start) % (*step);
563 /* If there is a start offset (which cannot be more than
564 ** one destination row), skip the appropriate number of
565 ** source rows and one destination row. The appropriate
566 ** number is what we do know (start_offset/cur_step) of
567 ** the new interval (*step/cur_step aka reduce_factor).
570 printf("start_offset: %lu end_offset: %lu\n",start_offset,end_offset);
571 printf("row_cnt before: %lu\n",row_cnt);
574 (*start) = (*start)-start_offset;
575 skiprows=reduce_factor-start_offset/cur_step;
576 srcptr+=skiprows* *ds_cnt;
577 for (col=0;col<(*ds_cnt);col++) *dstptr++ = DNAN;
581 printf("row_cnt between: %lu\n",row_cnt);
584 /* At the end we have some rows that are not going to be
585 ** used, the amount is end_offset/cur_step
588 (*end) = (*end)-end_offset+(*step);
589 skiprows = end_offset/cur_step;
593 printf("row_cnt after: %lu\n",row_cnt);
596 /* Sanity check: row_cnt should be multiple of reduce_factor */
597 /* if this gets triggered, something is REALLY WRONG ... we die immediately */
599 if (row_cnt%reduce_factor) {
600 printf("SANITY CHECK: %lu rows cannot be reduced by %i \n",
601 row_cnt,reduce_factor);
602 printf("BUG in reduce_data()\n");
606 /* Now combine reduce_factor intervals at a time
607 ** into one interval for the destination.
610 for (dst_row=0;(long int)row_cnt>=reduce_factor;dst_row++) {
611 for (col=0;col<(*ds_cnt);col++) {
612 rrd_value_t newval=DNAN;
613 unsigned long validval=0;
615 for (i=0;i<reduce_factor;i++) {
616 if (isnan(srcptr[i*(*ds_cnt)+col])) {
620 if (isnan(newval)) newval = srcptr[i*(*ds_cnt)+col];
628 newval += srcptr[i*(*ds_cnt)+col];
631 newval = min (newval,srcptr[i*(*ds_cnt)+col]);
634 /* an interval contains a failure if any subintervals contained a failure */
636 newval = max (newval,srcptr[i*(*ds_cnt)+col]);
639 newval = srcptr[i*(*ds_cnt)+col];
644 if (validval == 0){newval = DNAN;} else{
662 srcptr+=(*ds_cnt)*reduce_factor;
663 row_cnt-=reduce_factor;
665 /* If we had to alter the endtime, we didn't have enough
666 ** source rows to fill the last row. Fill it with NaN.
668 if (end_offset) for (col=0;col<(*ds_cnt);col++) *dstptr++ = DNAN;
670 row_cnt = ((*end)-(*start))/ *step;
672 printf("Done reducing. Currently %lu rows, time %lu to %lu, step %lu\n",
673 row_cnt,*start,*end,*step);
674 for (col=0;col<row_cnt;col++) {
675 printf("time %10lu: ",*start+(col+1)*(*step));
676 for (i=0;i<*ds_cnt;i++)
677 printf(" %8.2e",srcptr[*ds_cnt*col+i]);
684 /* get the data required for the graphs from the
688 data_fetch(image_desc_t *im )
693 /* pull the data from the log files ... */
694 for (i=0;i< (int)im->gdes_c;i++){
695 /* only GF_DEF elements fetch data */
696 if (im->gdes[i].gf != GF_DEF)
700 /* do we have it already ?*/
701 for (ii=0;ii<i;ii++) {
702 if (im->gdes[ii].gf != GF_DEF)
704 if ((strcmp(im->gdes[i].rrd, im->gdes[ii].rrd) == 0)
705 && (im->gdes[i].cf == im->gdes[ii].cf)
706 && (im->gdes[i].cf_reduce == im->gdes[ii].cf_reduce)
707 && (im->gdes[i].start == im->gdes[ii].start)
708 && (im->gdes[i].end == im->gdes[ii].end)
709 && (im->gdes[i].step == im->gdes[ii].step)) {
710 /* OK, the data is already there.
711 ** Just copy the header portion
713 im->gdes[i].start = im->gdes[ii].start;
714 im->gdes[i].end = im->gdes[ii].end;
715 im->gdes[i].step = im->gdes[ii].step;
716 im->gdes[i].ds_cnt = im->gdes[ii].ds_cnt;
717 im->gdes[i].ds_namv = im->gdes[ii].ds_namv;
718 im->gdes[i].data = im->gdes[ii].data;
719 im->gdes[i].data_first = 0;
726 unsigned long ft_step = im->gdes[i].step ;
728 if((rrd_fetch_fn(im->gdes[i].rrd,
734 &im->gdes[i].ds_namv,
735 &im->gdes[i].data)) == -1){
738 im->gdes[i].data_first = 1;
739 im->gdes[i].step = im->step;
741 if (ft_step < im->gdes[i].step) {
742 reduce_data(im->gdes[i].cf_reduce,
750 im->gdes[i].step = ft_step;
754 /* lets see if the required data source is really there */
755 for(ii=0;ii<(int)im->gdes[i].ds_cnt;ii++){
756 if(strcmp(im->gdes[i].ds_namv[ii],im->gdes[i].ds_nam) == 0){
759 if (im->gdes[i].ds== -1){
760 rrd_set_error("No DS called '%s' in '%s'",
761 im->gdes[i].ds_nam,im->gdes[i].rrd);
769 /* evaluate the expressions in the CDEF functions */
771 /*************************************************************
773 *************************************************************/
776 find_var_wrapper(void *arg1, char *key)
778 return find_var((image_desc_t *) arg1, key);
781 /* find gdes containing var*/
783 find_var(image_desc_t *im, char *key){
785 for(ii=0;ii<im->gdes_c-1;ii++){
786 if((im->gdes[ii].gf == GF_DEF
787 || im->gdes[ii].gf == GF_VDEF
788 || im->gdes[ii].gf == GF_CDEF)
789 && (strcmp(im->gdes[ii].vname,key) == 0)){
796 /* find the largest common denominator for all the numbers
797 in the 0 terminated num array */
802 for (i=0;num[i+1]!=0;i++){
804 rest=num[i] % num[i+1];
805 num[i]=num[i+1]; num[i+1]=rest;
809 /* return i==0?num[i]:num[i-1]; */
813 /* run the rpn calculator on all the VDEF and CDEF arguments */
815 data_calc( image_desc_t *im){
819 long *steparray, rpi;
824 rpnstack_init(&rpnstack);
826 for (gdi=0;gdi<im->gdes_c;gdi++){
827 /* Look for GF_VDEF and GF_CDEF in the same loop,
828 * so CDEFs can use VDEFs and vice versa
830 switch (im->gdes[gdi].gf) {
834 graph_desc_t *vdp = &im->gdes[im->gdes[gdi].vidx];
836 /* remove current shift */
837 vdp->start -= vdp->shift;
838 vdp->end -= vdp->shift;
841 if (im->gdes[gdi].shidx >= 0)
842 vdp->shift = im->gdes[im->gdes[gdi].shidx].vf.val;
845 vdp->shift = im->gdes[gdi].shval;
847 /* normalize shift to multiple of consolidated step */
848 vdp->shift = (vdp->shift / (long)vdp->step) * (long)vdp->step;
851 vdp->start += vdp->shift;
852 vdp->end += vdp->shift;
856 /* A VDEF has no DS. This also signals other parts
857 * of rrdtool that this is a VDEF value, not a CDEF.
859 im->gdes[gdi].ds_cnt = 0;
860 if (vdef_calc(im,gdi)) {
861 rrd_set_error("Error processing VDEF '%s'"
864 rpnstack_free(&rpnstack);
869 im->gdes[gdi].ds_cnt = 1;
870 im->gdes[gdi].ds = 0;
871 im->gdes[gdi].data_first = 1;
872 im->gdes[gdi].start = 0;
873 im->gdes[gdi].end = 0;
878 /* Find the variables in the expression.
879 * - VDEF variables are substituted by their values
880 * and the opcode is changed into OP_NUMBER.
881 * - CDEF variables are analized for their step size,
882 * the lowest common denominator of all the step
883 * sizes of the data sources involved is calculated
884 * and the resulting number is the step size for the
885 * resulting data source.
887 for(rpi=0;im->gdes[gdi].rpnp[rpi].op != OP_END;rpi++){
888 if(im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
889 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER){
890 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
891 if (im->gdes[ptr].ds_cnt == 0) { /* this is a VDEF data source */
893 printf("DEBUG: inside CDEF '%s' processing VDEF '%s'\n",
895 im->gdes[ptr].vname);
896 printf("DEBUG: value from vdef is %f\n",im->gdes[ptr].vf.val);
898 im->gdes[gdi].rpnp[rpi].val = im->gdes[ptr].vf.val;
899 im->gdes[gdi].rpnp[rpi].op = OP_NUMBER;
900 } else { /* normal variables and PREF(variables) */
902 /* add one entry to the array that keeps track of the step sizes of the
903 * data sources going into the CDEF. */
905 rrd_realloc(steparray,
906 (++stepcnt+1)*sizeof(*steparray)))==NULL){
907 rrd_set_error("realloc steparray");
908 rpnstack_free(&rpnstack);
912 steparray[stepcnt-1] = im->gdes[ptr].step;
914 /* adjust start and end of cdef (gdi) so
915 * that it runs from the latest start point
916 * to the earliest endpoint of any of the
917 * rras involved (ptr)
920 if(im->gdes[gdi].start < im->gdes[ptr].start)
921 im->gdes[gdi].start = im->gdes[ptr].start;
923 if(im->gdes[gdi].end == 0 ||
924 im->gdes[gdi].end > im->gdes[ptr].end)
925 im->gdes[gdi].end = im->gdes[ptr].end;
927 /* store pointer to the first element of
928 * the rra providing data for variable,
929 * further save step size and data source
932 im->gdes[gdi].rpnp[rpi].data = im->gdes[ptr].data + im->gdes[ptr].ds;
933 im->gdes[gdi].rpnp[rpi].step = im->gdes[ptr].step;
934 im->gdes[gdi].rpnp[rpi].ds_cnt = im->gdes[ptr].ds_cnt;
936 /* backoff the *.data ptr; this is done so
937 * rpncalc() function doesn't have to treat
938 * the first case differently
940 } /* if ds_cnt != 0 */
941 } /* if OP_VARIABLE */
942 } /* loop through all rpi */
944 /* move the data pointers to the correct period */
945 for(rpi=0;im->gdes[gdi].rpnp[rpi].op != OP_END;rpi++){
946 if(im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
947 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER){
948 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
949 long diff = im->gdes[gdi].start - im->gdes[ptr].start;
952 im->gdes[gdi].rpnp[rpi].data += (diff / im->gdes[ptr].step) * im->gdes[ptr].ds_cnt;
956 if(steparray == NULL){
957 rrd_set_error("rpn expressions without DEF"
958 " or CDEF variables are not supported");
959 rpnstack_free(&rpnstack);
962 steparray[stepcnt]=0;
963 /* Now find the resulting step. All steps in all
964 * used RRAs have to be visited
966 im->gdes[gdi].step = lcd(steparray);
968 if((im->gdes[gdi].data = malloc((
969 (im->gdes[gdi].end-im->gdes[gdi].start)
970 / im->gdes[gdi].step)
971 * sizeof(double)))==NULL){
972 rrd_set_error("malloc im->gdes[gdi].data");
973 rpnstack_free(&rpnstack);
977 /* Step through the new cdef results array and
978 * calculate the values
980 for (now = im->gdes[gdi].start + im->gdes[gdi].step;
981 now<=im->gdes[gdi].end;
982 now += im->gdes[gdi].step)
984 rpnp_t *rpnp = im -> gdes[gdi].rpnp;
986 /* 3rd arg of rpn_calc is for OP_VARIABLE lookups;
987 * in this case we are advancing by timesteps;
988 * we use the fact that time_t is a synonym for long
990 if (rpn_calc(rpnp,&rpnstack,(long) now,
991 im->gdes[gdi].data,++dataidx) == -1) {
992 /* rpn_calc sets the error string */
993 rpnstack_free(&rpnstack);
996 } /* enumerate over time steps within a CDEF */
1001 } /* enumerate over CDEFs */
1002 rpnstack_free(&rpnstack);
1006 /* massage data so, that we get one value for each x coordinate in the graph */
1008 data_proc( image_desc_t *im ){
1010 double pixstep = (double)(im->end-im->start)
1011 /(double)im->xsize; /* how much time
1012 passes in one pixel */
1014 double minval=DNAN,maxval=DNAN;
1016 unsigned long gr_time;
1018 /* memory for the processed data */
1019 for(i=0;i<im->gdes_c;i++) {
1020 if((im->gdes[i].gf==GF_LINE) ||
1021 (im->gdes[i].gf==GF_AREA) ||
1022 (im->gdes[i].gf==GF_TICK) ||
1023 (im->gdes[i].gf==GF_STACK)) {
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)
1046 value = im->gdes[ii].yrule;
1047 if (isnan(value) || (im->gdes[ii].gf == GF_TICK)) {
1048 /* The time of the data doesn't necessarily match
1049 ** the time of the graph. Beware.
1051 vidx = im->gdes[ii].vidx;
1052 if (im->gdes[vidx].gf == GF_VDEF) {
1053 value = im->gdes[vidx].vf.val;
1054 } else if (((long int)gr_time >= (long int)im->gdes[vidx].start) &&
1055 ((long int)gr_time <= (long int)im->gdes[vidx].end) ) {
1056 value = im->gdes[vidx].data[
1057 (unsigned long) floor(
1058 (double)(gr_time - im->gdes[vidx].start)
1059 / im->gdes[vidx].step)
1060 * im->gdes[vidx].ds_cnt
1068 if (! isnan(value)) {
1070 im->gdes[ii].p_data[i] = paintval;
1071 /* GF_TICK: the data values are not
1072 ** relevant for min and max
1074 if (finite(paintval) && im->gdes[ii].gf != GF_TICK ) {
1075 if (isnan(minval) || paintval < minval)
1077 if (isnan(maxval) || paintval > maxval)
1081 im->gdes[ii].p_data[i] = DNAN;
1090 /* if min or max have not been asigned a value this is because
1091 there was no data in the graph ... this is not good ...
1092 lets set these to dummy values then ... */
1094 if (isnan(minval)) minval = 0.0;
1095 if (isnan(maxval)) maxval = 1.0;
1097 /* adjust min and max values */
1098 if (isnan(im->minval)
1099 /* don't adjust low-end with log scale */
1100 || ((!im->logarithmic && !im->rigid) && im->minval > minval)
1102 im->minval = minval;
1103 if (isnan(im->maxval)
1104 || (!im->rigid && im->maxval < maxval)
1106 if (im->logarithmic)
1107 im->maxval = maxval * 1.1;
1109 im->maxval = maxval;
1111 /* make sure min is smaller than max */
1112 if (im->minval > im->maxval) {
1113 im->minval = 0.99 * im->maxval;
1116 /* make sure min and max are not equal */
1117 if (im->minval == im->maxval) {
1119 if (! im->logarithmic) {
1122 /* make sure min and max are not both zero */
1123 if (im->maxval == 0.0) {
1132 /* identify the point where the first gridline, label ... gets placed */
1136 time_t start, /* what is the initial time */
1137 enum tmt_en baseint, /* what is the basic interval */
1138 long basestep /* how many if these do we jump a time */
1142 localtime_r(&start, &tm);
1145 tm.tm_sec -= tm.tm_sec % basestep; break;
1148 tm.tm_min -= tm.tm_min % basestep;
1153 tm.tm_hour -= tm.tm_hour % basestep; break;
1155 /* we do NOT look at the basestep for this ... */
1158 tm.tm_hour = 0; break;
1160 /* we do NOT look at the basestep for this ... */
1164 tm.tm_mday -= tm.tm_wday -1; /* -1 because we want the monday */
1165 if (tm.tm_wday==0) tm.tm_mday -= 7; /* we want the *previous* monday */
1172 tm.tm_mon -= tm.tm_mon % basestep; break;
1180 tm.tm_year -= (tm.tm_year+1900) % basestep;
1185 /* identify the point where the next gridline, label ... gets placed */
1188 time_t current, /* what is the initial time */
1189 enum tmt_en baseint, /* what is the basic interval */
1190 long basestep /* how many if these do we jump a time */
1195 localtime_r(¤t, &tm);
1199 tm.tm_sec += basestep; break;
1201 tm.tm_min += basestep; break;
1203 tm.tm_hour += basestep; break;
1205 tm.tm_mday += basestep; break;
1207 tm.tm_mday += 7*basestep; break;
1209 tm.tm_mon += basestep; break;
1211 tm.tm_year += basestep;
1213 madetime = mktime(&tm);
1214 } while (madetime == -1); /* this is necessary to skip impssible times
1215 like the daylight saving time skips */
1221 /* calculate values required for PRINT and GPRINT functions */
1224 print_calc(image_desc_t *im, char ***prdata)
1226 long i,ii,validsteps;
1229 int graphelement = 0;
1232 double magfact = -1;
1236 if (im->imginfo) prlines++;
1237 for(i=0;i<im->gdes_c;i++){
1238 switch(im->gdes[i].gf){
1241 if(((*prdata) = rrd_realloc((*prdata),prlines*sizeof(char *)))==NULL){
1242 rrd_set_error("realloc prdata");
1246 /* PRINT and GPRINT can now print VDEF generated values.
1247 * There's no need to do any calculations on them as these
1248 * calculations were already made.
1250 vidx = im->gdes[i].vidx;
1251 if (im->gdes[vidx].gf==GF_VDEF) { /* simply use vals */
1252 printval = im->gdes[vidx].vf.val;
1253 printtime = im->gdes[vidx].vf.when;
1254 } else { /* need to calculate max,min,avg etcetera */
1255 max_ii =((im->gdes[vidx].end
1256 - im->gdes[vidx].start)
1257 / im->gdes[vidx].step
1258 * im->gdes[vidx].ds_cnt);
1261 for( ii=im->gdes[vidx].ds;
1263 ii+=im->gdes[vidx].ds_cnt){
1264 if (! finite(im->gdes[vidx].data[ii]))
1266 if (isnan(printval)){
1267 printval = im->gdes[vidx].data[ii];
1272 switch (im->gdes[i].cf){
1275 case CF_DEVSEASONAL:
1279 printval += im->gdes[vidx].data[ii];
1282 printval = min( printval, im->gdes[vidx].data[ii]);
1286 printval = max( printval, im->gdes[vidx].data[ii]);
1289 printval = im->gdes[vidx].data[ii];
1292 if (im->gdes[i].cf==CF_AVERAGE || im->gdes[i].cf > CF_LAST) {
1293 if (validsteps > 1) {
1294 printval = (printval / validsteps);
1297 } /* prepare printval */
1299 if (!strcmp(im->gdes[i].format,"%c")) { /* VDEF time print */
1300 char ctime_buf[128]; /* PS: for ctime_r, must be >= 26 chars */
1302 ctime_r(&printtime,ctime_buf);
1303 while(isprint(ctime_buf[iii])){iii++;}
1304 ctime_buf[iii]='\0';
1305 if (im->gdes[i].gf == GF_PRINT){
1306 (*prdata)[prlines-2] = malloc((FMT_LEG_LEN+2)*sizeof(char));
1307 sprintf((*prdata)[prlines-2],"%s (%lu)",ctime_buf,printtime);
1308 (*prdata)[prlines-1] = NULL;
1310 sprintf(im->gdes[i].legend,"%s (%lu)",ctime_buf,printtime);
1314 if ((percent_s = strstr(im->gdes[i].format,"%S")) != NULL) {
1315 /* Magfact is set to -1 upon entry to print_calc. If it
1316 * is still less than 0, then we need to run auto_scale.
1317 * Otherwise, put the value into the correct units. If
1318 * the value is 0, then do not set the symbol or magnification
1319 * so next the calculation will be performed again. */
1320 if (magfact < 0.0) {
1321 auto_scale(im,&printval,&si_symb,&magfact);
1322 if (printval == 0.0)
1325 printval /= magfact;
1327 *(++percent_s) = 's';
1328 } else if (strstr(im->gdes[i].format,"%s") != NULL) {
1329 auto_scale(im,&printval,&si_symb,&magfact);
1332 if (im->gdes[i].gf == GF_PRINT){
1333 (*prdata)[prlines-2] = malloc((FMT_LEG_LEN+2)*sizeof(char));
1334 (*prdata)[prlines-1] = NULL;
1335 if (bad_format(im->gdes[i].format)) {
1336 rrd_set_error("bad format for PRINT in '%s'", im->gdes[i].format);
1339 #ifdef HAVE_SNPRINTF
1340 snprintf((*prdata)[prlines-2],FMT_LEG_LEN,im->gdes[i].format,printval,si_symb);
1342 sprintf((*prdata)[prlines-2],im->gdes[i].format,printval,si_symb);
1347 if (bad_format(im->gdes[i].format)) {
1348 rrd_set_error("bad format for GPRINT in '%s'", im->gdes[i].format);
1351 #ifdef HAVE_SNPRINTF
1352 snprintf(im->gdes[i].legend,FMT_LEG_LEN-2,im->gdes[i].format,printval,si_symb);
1354 sprintf(im->gdes[i].legend,im->gdes[i].format,printval,si_symb);
1372 #ifdef WITH_PIECHART
1380 return graphelement;
1384 /* place legends with color spots */
1386 leg_place(image_desc_t *im)
1389 int interleg = im->text_prop[TEXT_PROP_LEGEND].size*2.0;
1390 int border = im->text_prop[TEXT_PROP_LEGEND].size*2.0;
1391 int fill=0, fill_last;
1393 int leg_x = border, leg_y = im->yimg;
1397 char prt_fctn; /*special printfunctions */
1400 if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
1401 if ((legspace = malloc(im->gdes_c*sizeof(int)))==NULL){
1402 rrd_set_error("malloc for legspace");
1406 for(i=0;i<im->gdes_c;i++){
1409 /* hid legends for rules which are not displayed */
1411 if(!(im->extra_flags & FORCE_RULES_LEGEND)) {
1412 if (im->gdes[i].gf == GF_HRULE &&
1413 (im->gdes[i].yrule < im->minval || im->gdes[i].yrule > im->maxval))
1414 im->gdes[i].legend[0] = '\0';
1416 if (im->gdes[i].gf == GF_VRULE &&
1417 (im->gdes[i].xrule < im->start || im->gdes[i].xrule > im->end))
1418 im->gdes[i].legend[0] = '\0';
1421 leg_cc = strlen(im->gdes[i].legend);
1423 /* is there a controle code ant the end of the legend string ? */
1424 /* and it is not a tab \\t */
1425 if (leg_cc >= 2 && im->gdes[i].legend[leg_cc-2] == '\\' && im->gdes[i].legend[leg_cc-1] != 't') {
1426 prt_fctn = im->gdes[i].legend[leg_cc-1];
1428 im->gdes[i].legend[leg_cc] = '\0';
1432 /* remove exess space */
1433 while (prt_fctn=='g' &&
1435 im->gdes[i].legend[leg_cc-1]==' '){
1437 im->gdes[i].legend[leg_cc]='\0';
1440 legspace[i]=(prt_fctn=='g' ? 0 : interleg);
1443 /* no interleg space if string ends in \g */
1444 fill += legspace[i];
1446 fill += gfx_get_text_width(im->canvas, fill+border,
1447 im->text_prop[TEXT_PROP_LEGEND].font,
1448 im->text_prop[TEXT_PROP_LEGEND].size,
1450 im->gdes[i].legend, 0);
1455 /* who said there was a special tag ... ?*/
1456 if (prt_fctn=='g') {
1459 if (prt_fctn == '\0') {
1460 if (i == im->gdes_c -1 ) prt_fctn ='l';
1462 /* is it time to place the legends ? */
1463 if (fill > im->ximg - 2*border){
1478 if (prt_fctn != '\0'){
1480 if (leg_c >= 2 && prt_fctn == 'j') {
1481 glue = (im->ximg - fill - 2* border) / (leg_c-1);
1485 if (prt_fctn =='c') leg_x = (im->ximg - fill) / 2.0;
1486 if (prt_fctn =='r') leg_x = im->ximg - fill - border;
1488 for(ii=mark;ii<=i;ii++){
1489 if(im->gdes[ii].legend[0]=='\0')
1490 continue; /* skip empty legends */
1491 im->gdes[ii].leg_x = leg_x;
1492 im->gdes[ii].leg_y = leg_y;
1494 gfx_get_text_width(im->canvas, leg_x,
1495 im->text_prop[TEXT_PROP_LEGEND].font,
1496 im->text_prop[TEXT_PROP_LEGEND].size,
1498 im->gdes[ii].legend, 0)
1502 leg_y += im->text_prop[TEXT_PROP_LEGEND].size*1.8;
1503 if (prt_fctn == 's') leg_y -= im->text_prop[TEXT_PROP_LEGEND].size;
1515 /* create a grid on the graph. it determines what to do
1516 from the values of xsize, start and end */
1518 /* the xaxis labels are determined from the number of seconds per pixel
1519 in the requested graph */
1524 calc_horizontal_grid(image_desc_t *im)
1530 int decimals, fractionals;
1532 im->ygrid_scale.labfact=2;
1534 range = im->maxval - im->minval;
1535 scaledrange = range / im->magfact;
1537 /* does the scale of this graph make it impossible to put lines
1538 on it? If so, give up. */
1539 if (isnan(scaledrange)) {
1543 /* find grid spaceing */
1545 if(isnan(im->ygridstep)){
1546 if(im->extra_flags & ALTYGRID) {
1547 /* find the value with max number of digits. Get number of digits */
1548 decimals = ceil(log10(max(fabs(im->maxval), fabs(im->minval))*im->viewfactor/im->magfact));
1549 if(decimals <= 0) /* everything is small. make place for zero */
1552 im->ygrid_scale.gridstep = pow((double)10, floor(log10(range)));
1554 if(im->ygrid_scale.gridstep == 0) /* range is one -> 0.1 is reasonable scale */
1555 im->ygrid_scale.gridstep = 0.1;
1556 /* should have at least 5 lines but no more then 15 */
1557 if(range/im->ygrid_scale.gridstep < 5)
1558 im->ygrid_scale.gridstep /= 10;
1559 if(range/im->ygrid_scale.gridstep > 15)
1560 im->ygrid_scale.gridstep *= 10;
1561 if(range/im->ygrid_scale.gridstep > 5) {
1562 im->ygrid_scale.labfact = 1;
1563 if(range/im->ygrid_scale.gridstep > 8)
1564 im->ygrid_scale.labfact = 2;
1567 im->ygrid_scale.gridstep /= 5;
1568 im->ygrid_scale.labfact = 5;
1570 fractionals = floor(log10(im->ygrid_scale.gridstep*(double)im->ygrid_scale.labfact*im->viewfactor/im->magfact));
1571 if(fractionals < 0) { /* small amplitude. */
1572 int len = decimals - fractionals + 1;
1573 if (im->unitslength < len+2) im->unitslength = len+2;
1574 sprintf(im->ygrid_scale.labfmt, "%%%d.%df%s", len, -fractionals,(im->symbol != ' ' ? " %c" : ""));
1576 int len = decimals + 1;
1577 if (im->unitslength < len+2) im->unitslength = len+2;
1578 sprintf(im->ygrid_scale.labfmt, "%%%d.1f%s", len, ( im->symbol != ' ' ? " %c" : "" ));
1582 for(i=0;ylab[i].grid > 0;i++){
1583 pixel = im->ysize / (scaledrange / ylab[i].grid);
1591 if (pixel * ylab[gridind].lfac[i] >= 2.5 * im->text_prop[TEXT_PROP_AXIS].size) {
1592 im->ygrid_scale.labfact = ylab[gridind].lfac[i];
1597 im->ygrid_scale.gridstep = ylab[gridind].grid * im->magfact;
1600 im->ygrid_scale.gridstep = im->ygridstep;
1601 im->ygrid_scale.labfact = im->ylabfact;
1606 int draw_horizontal_grid(image_desc_t *im)
1610 char graph_label[100];
1611 double X0=im->xorigin;
1612 double X1=im->xorigin+im->xsize;
1614 int sgrid = (int)( im->minval / im->ygrid_scale.gridstep - 1);
1615 int egrid = (int)( im->maxval / im->ygrid_scale.gridstep + 1);
1617 scaledstep = im->ygrid_scale.gridstep/im->magfact;
1618 MaxY = scaledstep*(double)im->viewfactor*(double)egrid;
1619 for (i = sgrid; i <= egrid; i++){
1620 double Y0=ytr(im,im->ygrid_scale.gridstep*i);
1621 if ( Y0 >= im->yorigin-im->ysize
1622 && Y0 <= im->yorigin){
1623 if(i % im->ygrid_scale.labfact == 0){
1624 if (im->symbol == ' ') {
1625 if(im->extra_flags & ALTYGRID) {
1626 sprintf(graph_label,im->ygrid_scale.labfmt,scaledstep*im->viewfactor*i);
1629 sprintf(graph_label,"%4.1f",scaledstep*im->viewfactor*i);
1631 sprintf(graph_label,"%4.0f",scaledstep*im->viewfactor*i);
1635 char sisym = ( i == 0 ? ' ' : im->symbol);
1636 if(im->extra_flags & ALTYGRID) {
1637 sprintf(graph_label,im->ygrid_scale.labfmt,scaledstep*im->viewfactor*i,sisym);
1640 sprintf(graph_label,"%4.1f %c",scaledstep*im->viewfactor*i, sisym);
1642 sprintf(graph_label,"%4.0f %c",scaledstep*im->viewfactor*i, sisym);
1647 gfx_new_text ( im->canvas,
1648 X0-im->text_prop[TEXT_PROP_AXIS].size, Y0,
1649 im->graph_col[GRC_FONT],
1650 im->text_prop[TEXT_PROP_AXIS].font,
1651 im->text_prop[TEXT_PROP_AXIS].size,
1652 im->tabwidth, 0.0, GFX_H_RIGHT, GFX_V_CENTER,
1654 gfx_new_dashed_line ( im->canvas,
1657 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1658 im->grid_dash_on, im->grid_dash_off);
1660 } else if (!(im->extra_flags & NOMINOR)) {
1661 gfx_new_dashed_line ( im->canvas,
1664 GRIDWIDTH, im->graph_col[GRC_GRID],
1665 im->grid_dash_on, im->grid_dash_off);
1673 /* logaritmic horizontal grid */
1675 horizontal_log_grid(image_desc_t *im)
1679 int minoridx=0, majoridx=0;
1680 char graph_label[100];
1682 double value, pixperstep, minstep;
1684 /* find grid spaceing */
1685 pixpex= (double)im->ysize / (log10(im->maxval) - log10(im->minval));
1687 if (isnan(pixpex)) {
1691 for(i=0;yloglab[i][0] > 0;i++){
1692 minstep = log10(yloglab[i][0]);
1693 for(ii=1;yloglab[i][ii+1] > 0;ii++){
1694 if(yloglab[i][ii+2]==0){
1695 minstep = log10(yloglab[i][ii+1])-log10(yloglab[i][ii]);
1699 pixperstep = pixpex * minstep;
1700 if(pixperstep > 5){minoridx = i;}
1701 if(pixperstep > 2 * im->text_prop[TEXT_PROP_LEGEND].size){majoridx = i;}
1705 X1=im->xorigin+im->xsize;
1706 /* paint minor grid */
1707 for (value = pow((double)10, log10(im->minval)
1708 - fmod(log10(im->minval),log10(yloglab[minoridx][0])));
1709 value <= im->maxval;
1710 value *= yloglab[minoridx][0]){
1711 if (value < im->minval) continue;
1713 while(yloglab[minoridx][++i] > 0){
1714 Y0 = ytr(im,value * yloglab[minoridx][i]);
1715 if (Y0 <= im->yorigin - im->ysize) break;
1716 gfx_new_dashed_line ( im->canvas,
1719 GRIDWIDTH, im->graph_col[GRC_GRID],
1720 im->grid_dash_on, im->grid_dash_off);
1724 /* paint major grid and labels*/
1725 for (value = pow((double)10, log10(im->minval)
1726 - fmod(log10(im->minval),log10(yloglab[majoridx][0])));
1727 value <= im->maxval;
1728 value *= yloglab[majoridx][0]){
1729 if (value < im->minval) continue;
1731 while(yloglab[majoridx][++i] > 0){
1732 Y0 = ytr(im,value * yloglab[majoridx][i]);
1733 if (Y0 <= im->yorigin - im->ysize) break;
1734 gfx_new_dashed_line ( im->canvas,
1737 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1738 im->grid_dash_on, im->grid_dash_off);
1740 sprintf(graph_label,"%3.0e",value * yloglab[majoridx][i]);
1741 gfx_new_text ( im->canvas,
1742 X0-im->text_prop[TEXT_PROP_AXIS].size, Y0,
1743 im->graph_col[GRC_FONT],
1744 im->text_prop[TEXT_PROP_AXIS].font,
1745 im->text_prop[TEXT_PROP_AXIS].size,
1746 im->tabwidth,0.0, GFX_H_RIGHT, GFX_V_CENTER,
1758 int xlab_sel; /* which sort of label and grid ? */
1759 time_t ti, tilab, timajor;
1761 char graph_label[100];
1762 double X0,Y0,Y1; /* points for filled graph and more*/
1765 /* the type of time grid is determined by finding
1766 the number of seconds per pixel in the graph */
1769 if(im->xlab_user.minsec == -1){
1770 factor=(im->end - im->start)/im->xsize;
1772 while ( xlab[xlab_sel+1].minsec != -1
1773 && xlab[xlab_sel+1].minsec <= factor){ xlab_sel++; }
1774 im->xlab_user.gridtm = xlab[xlab_sel].gridtm;
1775 im->xlab_user.gridst = xlab[xlab_sel].gridst;
1776 im->xlab_user.mgridtm = xlab[xlab_sel].mgridtm;
1777 im->xlab_user.mgridst = xlab[xlab_sel].mgridst;
1778 im->xlab_user.labtm = xlab[xlab_sel].labtm;
1779 im->xlab_user.labst = xlab[xlab_sel].labst;
1780 im->xlab_user.precis = xlab[xlab_sel].precis;
1781 im->xlab_user.stst = xlab[xlab_sel].stst;
1784 /* y coords are the same for every line ... */
1786 Y1 = im->yorigin-im->ysize;
1789 /* paint the minor grid */
1790 if (!(im->extra_flags & NOMINOR))
1792 for(ti = find_first_time(im->start,
1793 im->xlab_user.gridtm,
1794 im->xlab_user.gridst),
1795 timajor = find_first_time(im->start,
1796 im->xlab_user.mgridtm,
1797 im->xlab_user.mgridst);
1799 ti = find_next_time(ti,im->xlab_user.gridtm,im->xlab_user.gridst)
1801 /* are we inside the graph ? */
1802 if (ti < im->start || ti > im->end) continue;
1803 while (timajor < ti) {
1804 timajor = find_next_time(timajor,
1805 im->xlab_user.mgridtm, im->xlab_user.mgridst);
1807 if (ti == timajor) continue; /* skip as falls on major grid line */
1809 gfx_new_dashed_line(im->canvas,X0,Y0+1, X0,Y1-1,GRIDWIDTH,
1810 im->graph_col[GRC_GRID],
1811 im->grid_dash_on, im->grid_dash_off);
1816 /* paint the major grid */
1817 for(ti = find_first_time(im->start,
1818 im->xlab_user.mgridtm,
1819 im->xlab_user.mgridst);
1821 ti = find_next_time(ti,im->xlab_user.mgridtm,im->xlab_user.mgridst)
1823 /* are we inside the graph ? */
1824 if (ti < im->start || ti > im->end) continue;
1826 gfx_new_dashed_line(im->canvas,X0,Y0+3, X0,Y1-2,MGRIDWIDTH,
1827 im->graph_col[GRC_MGRID],
1828 im->grid_dash_on, im->grid_dash_off);
1831 /* paint the labels below the graph */
1832 for(ti = find_first_time(im->start - im->xlab_user.precis/2,
1833 im->xlab_user.labtm,
1834 im->xlab_user.labst);
1835 ti <= im->end - im->xlab_user.precis/2;
1836 ti = find_next_time(ti,im->xlab_user.labtm,im->xlab_user.labst)
1838 tilab= ti + im->xlab_user.precis/2; /* correct time for the label */
1839 /* are we inside the graph ? */
1840 if (tilab < im->start || tilab > im->end) continue;
1843 localtime_r(&tilab, &tm);
1844 strftime(graph_label,99,im->xlab_user.stst, &tm);
1846 # error "your libc has no strftime I guess we'll abort the exercise here."
1848 gfx_new_text ( im->canvas,
1849 xtr(im,tilab), Y0+im->text_prop[TEXT_PROP_AXIS].size,
1850 im->graph_col[GRC_FONT],
1851 im->text_prop[TEXT_PROP_AXIS].font,
1852 im->text_prop[TEXT_PROP_AXIS].size,
1853 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_TOP,
1866 /* draw x and y axis */
1867 /* gfx_new_line ( im->canvas, im->xorigin+im->xsize,im->yorigin,
1868 im->xorigin+im->xsize,im->yorigin-im->ysize,
1869 GRIDWIDTH, im->graph_col[GRC_AXIS]);
1871 gfx_new_line ( im->canvas, im->xorigin,im->yorigin-im->ysize,
1872 im->xorigin+im->xsize,im->yorigin-im->ysize,
1873 GRIDWIDTH, im->graph_col[GRC_AXIS]); */
1875 gfx_new_line ( im->canvas, im->xorigin-4,im->yorigin,
1876 im->xorigin+im->xsize+4,im->yorigin,
1877 MGRIDWIDTH, im->graph_col[GRC_AXIS]);
1879 gfx_new_line ( im->canvas, im->xorigin,im->yorigin+4,
1880 im->xorigin,im->yorigin-im->ysize-4,
1881 MGRIDWIDTH, im->graph_col[GRC_AXIS]);
1884 /* arrow for X and Y axis direction */
1885 gfx_new_area ( im->canvas,
1886 im->xorigin+im->xsize+2, im->yorigin-2,
1887 im->xorigin+im->xsize+2, im->yorigin+3,
1888 im->xorigin+im->xsize+7, im->yorigin+0.5, /* LINEOFFSET */
1889 im->graph_col[GRC_ARROW]);
1891 gfx_new_area ( im->canvas,
1892 im->xorigin-2, im->yorigin-im->ysize-2,
1893 im->xorigin+3, im->yorigin-im->ysize-2,
1894 im->xorigin+0.5, im->yorigin-im->ysize-7, /* LINEOFFSET */
1895 im->graph_col[GRC_ARROW]);
1900 grid_paint(image_desc_t *im)
1904 double X0,Y0; /* points for filled graph and more*/
1907 /* draw 3d border */
1908 node = gfx_new_area (im->canvas, 0,im->yimg,
1910 2,2,im->graph_col[GRC_SHADEA]);
1911 gfx_add_point( node , im->ximg - 2, 2 );
1912 gfx_add_point( node , im->ximg, 0 );
1913 gfx_add_point( node , 0,0 );
1914 /* gfx_add_point( node , 0,im->yimg ); */
1916 node = gfx_new_area (im->canvas, 2,im->yimg-2,
1917 im->ximg-2,im->yimg-2,
1919 im->graph_col[GRC_SHADEB]);
1920 gfx_add_point( node , im->ximg,0);
1921 gfx_add_point( node , im->ximg,im->yimg);
1922 gfx_add_point( node , 0,im->yimg);
1923 /* gfx_add_point( node , 0,im->yimg ); */
1926 if (im->draw_x_grid == 1 )
1929 if (im->draw_y_grid == 1){
1930 if(im->logarithmic){
1931 res = horizontal_log_grid(im);
1933 res = draw_horizontal_grid(im);
1936 /* dont draw horizontal grid if there is no min and max val */
1938 char *nodata = "No Data found";
1939 gfx_new_text(im->canvas,im->ximg/2, (2*im->yorigin-im->ysize) / 2,
1940 im->graph_col[GRC_FONT],
1941 im->text_prop[TEXT_PROP_AXIS].font,
1942 im->text_prop[TEXT_PROP_AXIS].size,
1943 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_CENTER,
1948 /* yaxis unit description */
1949 gfx_new_text( im->canvas,
1950 10, (im->yorigin - im->ysize/2),
1951 im->graph_col[GRC_FONT],
1952 im->text_prop[TEXT_PROP_UNIT].font,
1953 im->text_prop[TEXT_PROP_UNIT].size, im->tabwidth,
1954 RRDGRAPH_YLEGEND_ANGLE,
1955 GFX_H_LEFT, GFX_V_CENTER,
1959 gfx_new_text( im->canvas,
1960 im->ximg/2, im->text_prop[TEXT_PROP_TITLE].size*1.3+4,
1961 im->graph_col[GRC_FONT],
1962 im->text_prop[TEXT_PROP_TITLE].font,
1963 im->text_prop[TEXT_PROP_TITLE].size, im->tabwidth, 0.0,
1964 GFX_H_CENTER, GFX_V_CENTER,
1966 /* rrdtool 'logo' */
1967 gfx_new_text( im->canvas,
1969 ( im->graph_col[GRC_FONT] & 0xffffff00 ) | 0x00000044,
1970 im->text_prop[TEXT_PROP_AXIS].font,
1971 5.5, im->tabwidth, 270,
1972 GFX_H_RIGHT, GFX_V_TOP,
1973 "RRDTOOL / TOBI OETIKER");
1976 if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
1977 for(i=0;i<im->gdes_c;i++){
1978 if(im->gdes[i].legend[0] =='\0')
1981 /* im->gdes[i].leg_y is the bottom of the legend */
1982 X0 = im->gdes[i].leg_x;
1983 Y0 = im->gdes[i].leg_y;
1984 gfx_new_text ( im->canvas, X0, Y0,
1985 im->graph_col[GRC_FONT],
1986 im->text_prop[TEXT_PROP_LEGEND].font,
1987 im->text_prop[TEXT_PROP_LEGEND].size,
1988 im->tabwidth,0.0, GFX_H_LEFT, GFX_V_BOTTOM,
1989 im->gdes[i].legend );
1990 /* The legend for GRAPH items starts with "M " to have
1991 enough space for the box */
1992 if ( im->gdes[i].gf != GF_PRINT &&
1993 im->gdes[i].gf != GF_GPRINT &&
1994 im->gdes[i].gf != GF_COMMENT) {
1997 boxH = gfx_get_text_width(im->canvas, 0,
1998 im->text_prop[TEXT_PROP_LEGEND].font,
1999 im->text_prop[TEXT_PROP_LEGEND].size,
2000 im->tabwidth,"o", 0) * 1.2;
2003 /* make sure transparent colors show up the same way as in the graph */
2004 node = gfx_new_area(im->canvas,
2008 im->graph_col[GRC_BACK]);
2009 gfx_add_point ( node, X0+boxH, Y0-boxV );
2011 node = gfx_new_area(im->canvas,
2016 gfx_add_point ( node, X0+boxH, Y0-boxV );
2017 node = gfx_new_line(im->canvas,
2020 1.0,im->graph_col[GRC_FRAME]);
2021 gfx_add_point(node,X0+boxH,Y0);
2022 gfx_add_point(node,X0+boxH,Y0-boxV);
2023 gfx_close_path(node);
2030 /*****************************************************
2031 * lazy check make sure we rely need to create this graph
2032 *****************************************************/
2034 int lazy_check(image_desc_t *im){
2037 struct stat imgstat;
2039 if (im->lazy == 0) return 0; /* no lazy option */
2040 if (stat(im->graphfile,&imgstat) != 0)
2041 return 0; /* can't stat */
2042 /* one pixel in the existing graph is more then what we would
2044 if (time(NULL) - imgstat.st_mtime >
2045 (im->end - im->start) / im->xsize)
2047 if ((fd = fopen(im->graphfile,"rb")) == NULL)
2048 return 0; /* the file does not exist */
2049 switch (im->canvas->imgformat) {
2051 size = PngSize(fd,&(im->ximg),&(im->yimg));
2060 #ifdef WITH_PIECHART
2062 pie_part(image_desc_t *im, gfx_color_t color,
2063 double PieCenterX, double PieCenterY, double Radius,
2064 double startangle, double endangle)
2068 double step=M_PI/50; /* Number of iterations for the circle;
2069 ** 10 is definitely too low, more than
2070 ** 50 seems to be overkill
2073 /* Strange but true: we have to work clockwise or else
2074 ** anti aliasing nor transparency don't work.
2076 ** This test is here to make sure we do it right, also
2077 ** this makes the for...next loop more easy to implement.
2078 ** The return will occur if the user enters a negative number
2079 ** (which shouldn't be done according to the specs) or if the
2080 ** programmers do something wrong (which, as we all know, never
2081 ** happens anyway :)
2083 if (endangle<startangle) return;
2085 /* Hidden feature: Radius decreases each full circle */
2087 while (angle>=2*M_PI) {
2092 node=gfx_new_area(im->canvas,
2093 PieCenterX+sin(startangle)*Radius,
2094 PieCenterY-cos(startangle)*Radius,
2097 PieCenterX+sin(endangle)*Radius,
2098 PieCenterY-cos(endangle)*Radius,
2100 for (angle=endangle;angle-startangle>=step;angle-=step) {
2102 PieCenterX+sin(angle)*Radius,
2103 PieCenterY-cos(angle)*Radius );
2110 graph_size_location(image_desc_t *im, int elements
2112 #ifdef WITH_PIECHART
2118 /* The actual size of the image to draw is determined from
2119 ** several sources. The size given on the command line is
2120 ** the graph area but we need more as we have to draw labels
2121 ** and other things outside the graph area
2124 /* +-+-------------------------------------------+
2125 ** |l|.................title.....................|
2126 ** |e+--+-------------------------------+--------+
2129 ** |l| l| main graph area | chart |
2132 ** |r+--+-------------------------------+--------+
2133 ** |e| | x-axis labels | |
2134 ** |v+--+-------------------------------+--------+
2135 ** | |..............legends......................|
2136 ** +-+-------------------------------------------+
2142 #ifdef WITH_PIECHART
2147 Xlegend =0, Ylegend =0,
2149 Xspacing =15, Yspacing =15;
2151 if (im->extra_flags & ONLY_GRAPH) {
2153 im->ximg = im->xsize;
2154 im->yimg = im->ysize;
2155 im->yorigin = im->ysize;
2159 if (im->ylegend[0] != '\0' ) {
2160 Xvertical = im->text_prop[TEXT_PROP_UNIT].size *2;
2164 if (im->title[0] != '\0') {
2165 /* The title is placed "inbetween" two text lines so it
2166 ** automatically has some vertical spacing. The horizontal
2167 ** spacing is added here, on each side.
2169 /* don't care for the with of the title
2170 Xtitle = gfx_get_text_width(im->canvas, 0,
2171 im->text_prop[TEXT_PROP_TITLE].font,
2172 im->text_prop[TEXT_PROP_TITLE].size,
2174 im->title, 0) + 2*Xspacing; */
2175 Ytitle = im->text_prop[TEXT_PROP_TITLE].size*2.6+10;
2181 if (im->draw_x_grid) {
2182 Yxlabel=im->text_prop[TEXT_PROP_AXIS].size *2.5;
2184 if (im->draw_y_grid) {
2185 Xylabel=gfx_get_text_width(im->canvas, 0,
2186 im->text_prop[TEXT_PROP_AXIS].font,
2187 im->text_prop[TEXT_PROP_AXIS].size,
2189 "0", 0) * im->unitslength;
2193 #ifdef WITH_PIECHART
2195 im->piesize=im->xsize<im->ysize?im->xsize:im->ysize;
2201 /* Now calculate the total size. Insert some spacing where
2202 desired. im->xorigin and im->yorigin need to correspond
2203 with the lower left corner of the main graph area or, if
2204 this one is not set, the imaginary box surrounding the
2207 /* The legend width cannot yet be determined, as a result we
2208 ** have problems adjusting the image to it. For now, we just
2209 ** forget about it at all; the legend will have to fit in the
2210 ** size already allocated.
2212 im->ximg = Xylabel + Xmain + 2 * Xspacing;
2214 #ifdef WITH_PIECHART
2218 if (Xmain) im->ximg += Xspacing;
2219 #ifdef WITH_PIECHART
2220 if (Xpie) im->ximg += Xspacing;
2223 im->xorigin = Xspacing + Xylabel;
2225 /* the length of the title should not influence with width of the graph
2226 if (Xtitle > im->ximg) im->ximg = Xtitle; */
2228 if (Xvertical) { /* unit description */
2229 im->ximg += Xvertical;
2230 im->xorigin += Xvertical;
2234 /* The vertical size is interesting... we need to compare
2235 ** the sum of {Ytitle, Ymain, Yxlabel, Ylegend} with Yvertical
2236 ** however we need to know {Ytitle+Ymain+Yxlabel} in order to
2237 ** start even thinking about Ylegend.
2239 ** Do it in three portions: First calculate the inner part,
2240 ** then do the legend, then adjust the total height of the img.
2243 /* reserve space for main and/or pie */
2245 im->yimg = Ymain + Yxlabel;
2247 #ifdef WITH_PIECHART
2248 if (im->yimg < Ypie) im->yimg = Ypie;
2251 im->yorigin = im->yimg - Yxlabel;
2253 /* reserve space for the title *or* some padding above the graph */
2256 im->yorigin += Ytitle;
2258 im->yimg += 1.5*Yspacing;
2259 im->yorigin += 1.5*Yspacing;
2261 /* reserve space for padding below the graph */
2262 im->yimg += Yspacing;
2265 /* Determine where to place the legends onto the image.
2266 ** Adjust im->yimg to match the space requirements.
2268 if(leg_place(im)==-1)
2273 if (Xlegend > im->ximg) {
2275 /* reposition Pie */
2279 #ifdef WITH_PIECHART
2280 /* The pie is placed in the upper right hand corner,
2281 ** just below the title (if any) and with sufficient
2285 im->pie_x = im->ximg - Xspacing - Xpie/2;
2286 im->pie_y = im->yorigin-Ymain+Ypie/2;
2288 im->pie_x = im->ximg/2;
2289 im->pie_y = im->yorigin-Ypie/2;
2296 /* draw that picture thing ... */
2298 graph_paint(image_desc_t *im, char ***calcpr)
2301 int lazy = lazy_check(im);
2302 #ifdef WITH_PIECHART
2304 double PieStart=0.0;
2309 double areazero = 0.0;
2310 enum gf_en stack_gf = GF_PRINT;
2311 graph_desc_t *lastgdes = NULL;
2313 /* if we are lazy and there is nothing to PRINT ... quit now */
2314 if (lazy && im->prt_c==0) return 0;
2316 /* pull the data from the rrd files ... */
2318 if(data_fetch(im)==-1)
2321 /* evaluate VDEF and CDEF operations ... */
2322 if(data_calc(im)==-1)
2325 #ifdef WITH_PIECHART
2326 /* check if we need to draw a piechart */
2327 for(i=0;i<im->gdes_c;i++){
2328 if (im->gdes[i].gf == GF_PART) {
2335 /* calculate and PRINT and GPRINT definitions. We have to do it at
2336 * this point because it will affect the length of the legends
2337 * if there are no graph elements we stop here ...
2338 * if we are lazy, try to quit ...
2340 i=print_calc(im,calcpr);
2343 #ifdef WITH_PIECHART
2346 ) || lazy) return 0;
2348 #ifdef WITH_PIECHART
2349 /* If there's only the pie chart to draw, signal this */
2350 if (i==0) piechart=2;
2353 /* get actual drawing data and find min and max values*/
2354 if(data_proc(im)==-1)
2357 if(!im->logarithmic){si_unit(im);} /* identify si magnitude Kilo, Mega Giga ? */
2359 if(!im->rigid && ! im->logarithmic)
2360 expand_range(im); /* make sure the upper and lower limit are
2363 if (!calc_horizontal_grid(im))
2370 /**************************************************************
2371 *** Calculating sizes and locations became a bit confusing ***
2372 *** so I moved this into a separate function. ***
2373 **************************************************************/
2374 if(graph_size_location(im,i
2375 #ifdef WITH_PIECHART
2381 /* the actual graph is created by going through the individual
2382 graph elements and then drawing them */
2384 node=gfx_new_area ( im->canvas,
2388 im->graph_col[GRC_BACK]);
2390 gfx_add_point(node,im->ximg, 0);
2392 #ifdef WITH_PIECHART
2393 if (piechart != 2) {
2395 node=gfx_new_area ( im->canvas,
2396 im->xorigin, im->yorigin,
2397 im->xorigin + im->xsize, im->yorigin,
2398 im->xorigin + im->xsize, im->yorigin-im->ysize,
2399 im->graph_col[GRC_CANVAS]);
2401 gfx_add_point(node,im->xorigin, im->yorigin - im->ysize);
2403 if (im->minval > 0.0)
2404 areazero = im->minval;
2405 if (im->maxval < 0.0)
2406 areazero = im->maxval;
2407 #ifdef WITH_PIECHART
2411 #ifdef WITH_PIECHART
2413 pie_part(im,im->graph_col[GRC_CANVAS],im->pie_x,im->pie_y,im->piesize*0.5,0,2*M_PI);
2417 for(i=0;i<im->gdes_c;i++){
2418 switch(im->gdes[i].gf){
2431 for (ii = 0; ii < im->xsize; ii++)
2433 if (!isnan(im->gdes[i].p_data[ii]) &&
2434 im->gdes[i].p_data[ii] > 0.0)
2436 /* generate a tick */
2437 gfx_new_line(im->canvas, im -> xorigin + ii,
2438 im -> yorigin - (im -> gdes[i].yrule * im -> ysize),
2442 im -> gdes[i].col );
2448 stack_gf = im->gdes[i].gf;
2450 /* fix data points at oo and -oo */
2451 for(ii=0;ii<im->xsize;ii++){
2452 if (isinf(im->gdes[i].p_data[ii])){
2453 if (im->gdes[i].p_data[ii] > 0) {
2454 im->gdes[i].p_data[ii] = im->maxval ;
2456 im->gdes[i].p_data[ii] = im->minval ;
2462 /* *******************************************************
2467 -------|--t-1--t--------------------------------
2469 if we know the value at time t was a then
2470 we draw a square from t-1 to t with the value a.
2472 ********************************************************* */
2473 if (im->gdes[i].col != 0x0){
2474 /* GF_LINE and friend */
2475 if(stack_gf == GF_LINE ){
2477 for(ii=1;ii<im->xsize;ii++){
2478 if (isnan(im->gdes[i].p_data[ii]) || (im->slopemode==1 && isnan(im->gdes[i].p_data[ii-1]))){
2482 if ( node == NULL ) {
2483 if ( im->slopemode == 0 ){
2484 node = gfx_new_line(im->canvas,
2485 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii]),
2486 ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]),
2487 im->gdes[i].linewidth,
2490 node = gfx_new_line(im->canvas,
2491 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii-1]),
2492 ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]),
2493 im->gdes[i].linewidth,
2497 if ( im->slopemode==0 ){
2498 gfx_add_point(node,ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii]));
2500 gfx_add_point(node,ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]));
2505 double ybase0 = DNAN,ytop0=DNAN;
2506 for(ii=0;ii<im->xsize;ii++){
2507 /* keep things simple for now, just draw these bars
2508 do not try to build a big and complex area */
2510 if ( im->slopemode == 0 && ii==0){
2513 if ( isnan(im->gdes[i].p_data[ii]) ) {
2517 ytop = ytr(im,im->gdes[i].p_data[ii]);
2518 if ( lastgdes && im->gdes[i].stack ) {
2519 ybase = ytr(im,lastgdes->p_data[ii]);
2521 ybase = ytr(im,areazero);
2523 if ( ybase == ytop ){
2527 /* every area has to be wound clock-wise,
2528 so we have to make sur base remains base */
2530 double extra = ytop;
2534 if ( im->slopemode == 0){
2538 if ( !isnan(ybase0) ){
2539 node = gfx_new_area(im->canvas,
2540 (double)ii-1.2+(double)im->xorigin,ybase0-0.2,
2541 (double)ii-1.2+(double)im->xorigin,ytop0+0.2,
2542 (double)ii+0.2+(double)im->xorigin,ytop+0.2,
2546 (double)ii+0.02+im->xorigin,ybase-0.2
2552 } /* else GF_LINE */
2553 } /* if color != 0x0 */
2554 /* make sure we do not run into trouble when stacking on NaN */
2555 for(ii=0;ii<im->xsize;ii++){
2556 if (isnan(im->gdes[i].p_data[ii])) {
2557 if (lastgdes && (im->gdes[i].stack)) {
2558 im->gdes[i].p_data[ii] = lastgdes->p_data[ii];
2560 im->gdes[i].p_data[ii] = ytr(im,areazero);
2564 lastgdes = &(im->gdes[i]);
2566 #ifdef WITH_PIECHART
2568 if(isnan(im->gdes[i].yrule)) /* fetch variable */
2569 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2571 if (finite(im->gdes[i].yrule)) { /* even the fetched var can be NaN */
2572 pie_part(im,im->gdes[i].col,
2573 im->pie_x,im->pie_y,im->piesize*0.4,
2574 M_PI*2.0*PieStart/100.0,
2575 M_PI*2.0*(PieStart+im->gdes[i].yrule)/100.0);
2576 PieStart += im->gdes[i].yrule;
2583 #ifdef WITH_PIECHART
2591 /* grid_paint also does the text */
2592 if( !(im->extra_flags & ONLY_GRAPH) )
2596 if( !(im->extra_flags & ONLY_GRAPH) )
2599 /* the RULES are the last thing to paint ... */
2600 for(i=0;i<im->gdes_c;i++){
2602 switch(im->gdes[i].gf){
2604 if(isnan(im->gdes[i].yrule)) { /* fetch variable */
2605 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2607 if(im->gdes[i].yrule >= im->minval
2608 && im->gdes[i].yrule <= im->maxval)
2609 gfx_new_line(im->canvas,
2610 im->xorigin,ytr(im,im->gdes[i].yrule),
2611 im->xorigin+im->xsize,ytr(im,im->gdes[i].yrule),
2612 1.0,im->gdes[i].col);
2615 if(im->gdes[i].xrule == 0) { /* fetch variable */
2616 im->gdes[i].xrule = im->gdes[im->gdes[i].vidx].vf.when;
2618 if(im->gdes[i].xrule >= im->start
2619 && im->gdes[i].xrule <= im->end)
2620 gfx_new_line(im->canvas,
2621 xtr(im,im->gdes[i].xrule),im->yorigin,
2622 xtr(im,im->gdes[i].xrule),im->yorigin-im->ysize,
2623 1.0,im->gdes[i].col);
2631 if (strcmp(im->graphfile,"-")==0) {
2632 fo = im->graphhandle ? im->graphhandle : stdout;
2633 #if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
2634 /* Change translation mode for stdout to BINARY */
2635 _setmode( _fileno( fo ), O_BINARY );
2638 if ((fo = fopen(im->graphfile,"wb")) == NULL) {
2639 rrd_set_error("Opening '%s' for write: %s",im->graphfile,
2640 rrd_strerror(errno));
2644 gfx_render (im->canvas,im->ximg,im->yimg,0x00000000,fo);
2645 if (strcmp(im->graphfile,"-") != 0)
2651 /*****************************************************
2653 *****************************************************/
2656 gdes_alloc(image_desc_t *im){
2659 if ((im->gdes = (graph_desc_t *) rrd_realloc(im->gdes, (im->gdes_c)
2660 * sizeof(graph_desc_t)))==NULL){
2661 rrd_set_error("realloc graph_descs");
2666 im->gdes[im->gdes_c-1].step=im->step;
2667 im->gdes[im->gdes_c-1].stack=0;
2668 im->gdes[im->gdes_c-1].debug=0;
2669 im->gdes[im->gdes_c-1].start=im->start;
2670 im->gdes[im->gdes_c-1].end=im->end;
2671 im->gdes[im->gdes_c-1].vname[0]='\0';
2672 im->gdes[im->gdes_c-1].data=NULL;
2673 im->gdes[im->gdes_c-1].ds_namv=NULL;
2674 im->gdes[im->gdes_c-1].data_first=0;
2675 im->gdes[im->gdes_c-1].p_data=NULL;
2676 im->gdes[im->gdes_c-1].rpnp=NULL;
2677 im->gdes[im->gdes_c-1].shift=0;
2678 im->gdes[im->gdes_c-1].col = 0x0;
2679 im->gdes[im->gdes_c-1].legend[0]='\0';
2680 im->gdes[im->gdes_c-1].format[0]='\0';
2681 im->gdes[im->gdes_c-1].rrd[0]='\0';
2682 im->gdes[im->gdes_c-1].ds=-1;
2683 im->gdes[im->gdes_c-1].p_data=NULL;
2684 im->gdes[im->gdes_c-1].yrule=DNAN;
2685 im->gdes[im->gdes_c-1].xrule=0;
2689 /* copies input untill the first unescaped colon is found
2690 or until input ends. backslashes have to be escaped as well */
2692 scan_for_col(char *input, int len, char *output)
2697 input[inp] != ':' &&
2700 if (input[inp] == '\\' &&
2701 input[inp+1] != '\0' &&
2702 (input[inp+1] == '\\' ||
2703 input[inp+1] == ':')){
2704 output[outp++] = input[++inp];
2707 output[outp++] = input[inp];
2710 output[outp] = '\0';
2713 /* Some surgery done on this function, it became ridiculously big.
2715 ** - initializing now in rrd_graph_init()
2716 ** - options parsing now in rrd_graph_options()
2717 ** - script parsing now in rrd_graph_script()
2720 rrd_graph(int argc, char **argv, char ***prdata, int *xsize, int *ysize, FILE *stream, double *ymin, double *ymax)
2723 rrd_graph_init(&im);
2724 im.graphhandle = stream;
2726 rrd_graph_options(argc,argv,&im);
2727 if (rrd_test_error()) {
2732 if (strlen(argv[optind])>=MAXPATH) {
2733 rrd_set_error("filename (including path) too long");
2737 strncpy(im.graphfile,argv[optind],MAXPATH-1);
2738 im.graphfile[MAXPATH-1]='\0';
2740 rrd_graph_script(argc,argv,&im,1);
2741 if (rrd_test_error()) {
2746 /* Everything is now read and the actual work can start */
2749 if (graph_paint(&im,prdata)==-1){
2754 /* The image is generated and needs to be output.
2755 ** Also, if needed, print a line with information about the image.
2765 /* maybe prdata is not allocated yet ... lets do it now */
2766 if ((*prdata = calloc(2,sizeof(char *)))==NULL) {
2767 rrd_set_error("malloc imginfo");
2771 if(((*prdata)[0] = malloc((strlen(im.imginfo)+200+strlen(im.graphfile))*sizeof(char)))
2773 rrd_set_error("malloc imginfo");
2776 filename=im.graphfile+strlen(im.graphfile);
2777 while(filename > im.graphfile) {
2778 if (*(filename-1)=='/' || *(filename-1)=='\\' ) break;
2782 sprintf((*prdata)[0],im.imginfo,filename,(long)(im.canvas->zoom*im.ximg),(long)(im.canvas->zoom*im.yimg));
2789 rrd_graph_init(image_desc_t *im)
2796 #ifdef HAVE_SETLOCALE
2797 setlocale(LC_TIME,"");
2802 im->xlab_user.minsec = -1;
2808 im->ylegend[0] = '\0';
2809 im->title[0] = '\0';
2812 im->unitsexponent= 9999;
2815 im->viewfactor = 1.0;
2822 im->logarithmic = 0;
2823 im->ygridstep = DNAN;
2824 im->draw_x_grid = 1;
2825 im->draw_y_grid = 1;
2830 im->canvas = gfx_new_canvas();
2831 im->grid_dash_on = 1;
2832 im->grid_dash_off = 1;
2833 im->tabwidth = 40.0;
2835 for(i=0;i<DIM(graph_col);i++)
2836 im->graph_col[i]=graph_col[i];
2838 #if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
2841 char rrd_win_default_font[1000];
2842 windir = getenv("windir");
2843 /* %windir% is something like D:\windows or C:\winnt */
2844 if (windir != NULL) {
2845 strncpy(rrd_win_default_font,windir,999);
2846 rrd_win_default_font[999] = '\0';
2847 strcat(rrd_win_default_font,"\\fonts\\");
2848 strcat(rrd_win_default_font,RRD_DEFAULT_FONT);
2849 for(i=0;i<DIM(text_prop);i++){
2850 strncpy(text_prop[i].font,rrd_win_default_font,sizeof(text_prop[i].font)-1);
2851 text_prop[i].font[sizeof(text_prop[i].font)-1] = '\0';
2858 deffont = getenv("RRD_DEFAULT_FONT");
2859 if (deffont != NULL) {
2860 for(i=0;i<DIM(text_prop);i++){
2861 strncpy(text_prop[i].font,deffont,sizeof(text_prop[i].font)-1);
2862 text_prop[i].font[sizeof(text_prop[i].font)-1] = '\0';
2866 for(i=0;i<DIM(text_prop);i++){
2867 im->text_prop[i].size = text_prop[i].size;
2868 strcpy(im->text_prop[i].font,text_prop[i].font);
2873 rrd_graph_options(int argc, char *argv[],image_desc_t *im)
2876 char *parsetime_error = NULL;
2877 char scan_gtm[12],scan_mtm[12],scan_ltm[12],col_nam[12];
2878 time_t start_tmp=0,end_tmp=0;
2880 struct rrd_time_value start_tv, end_tv;
2882 optind = 0; opterr = 0; /* initialize getopt */
2884 parsetime("end-24h", &start_tv);
2885 parsetime("now", &end_tv);
2888 static struct option long_options[] =
2890 {"start", required_argument, 0, 's'},
2891 {"end", required_argument, 0, 'e'},
2892 {"x-grid", required_argument, 0, 'x'},
2893 {"y-grid", required_argument, 0, 'y'},
2894 {"vertical-label",required_argument,0,'v'},
2895 {"width", required_argument, 0, 'w'},
2896 {"height", required_argument, 0, 'h'},
2897 {"interlaced", no_argument, 0, 'i'},
2898 {"upper-limit",required_argument, 0, 'u'},
2899 {"lower-limit",required_argument, 0, 'l'},
2900 {"rigid", no_argument, 0, 'r'},
2901 {"base", required_argument, 0, 'b'},
2902 {"logarithmic",no_argument, 0, 'o'},
2903 {"color", required_argument, 0, 'c'},
2904 {"font", required_argument, 0, 'n'},
2905 {"title", required_argument, 0, 't'},
2906 {"imginfo", required_argument, 0, 'f'},
2907 {"imgformat", required_argument, 0, 'a'},
2908 {"lazy", no_argument, 0, 'z'},
2909 {"zoom", required_argument, 0, 'm'},
2910 {"no-legend", no_argument, 0, 'g'},
2911 {"force-rules-legend",no_argument,0, 'F'},
2912 {"only-graph", no_argument, 0, 'j'},
2913 {"alt-y-grid", no_argument, 0, 'Y'},
2914 {"no-minor", no_argument, 0, 'I'},
2915 {"slope-mode", no_argument, 0, 'E'},
2916 {"alt-autoscale", no_argument, 0, 'A'},
2917 {"alt-autoscale-max", no_argument, 0, 'M'},
2918 {"no-gridfit", no_argument, 0, 'N'},
2919 {"units-exponent",required_argument, 0, 'X'},
2920 {"units-length",required_argument, 0, 'L'},
2921 {"step", required_argument, 0, 'S'},
2922 {"tabwidth", required_argument, 0, 'T'},
2923 {"font-render-mode", required_argument, 0, 'R'},
2924 {"font-smoothing-threshold", required_argument, 0, 'B'},
2925 {"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 */
2927 int option_index = 0;
2929 int col_start,col_end;
2931 opt = getopt_long(argc, argv,
2932 "s:e:x:y:v:w:h:iu:l:rb:oc:n:m:t:f:a:I:zgjFYAMEX:L:S:T:NR:B:",
2933 long_options, &option_index);
2940 im->extra_flags |= NOMINOR;
2943 im->extra_flags |= ALTYGRID;
2946 im->extra_flags |= ALTAUTOSCALE;
2949 im->extra_flags |= ALTAUTOSCALE_MAX;
2952 im->extra_flags |= ONLY_GRAPH;
2955 im->extra_flags |= NOLEGEND;
2958 im->extra_flags |= FORCE_RULES_LEGEND;
2961 im->unitsexponent = atoi(optarg);
2964 im->unitslength = atoi(optarg);
2967 im->tabwidth = atof(optarg);
2970 im->step = atoi(optarg);
2976 if ((parsetime_error = parsetime(optarg, &start_tv))) {
2977 rrd_set_error( "start time: %s", parsetime_error );
2982 if ((parsetime_error = parsetime(optarg, &end_tv))) {
2983 rrd_set_error( "end time: %s", parsetime_error );
2988 if(strcmp(optarg,"none") == 0){
2994 "%10[A-Z]:%ld:%10[A-Z]:%ld:%10[A-Z]:%ld:%ld:%n",
2996 &im->xlab_user.gridst,
2998 &im->xlab_user.mgridst,
3000 &im->xlab_user.labst,
3001 &im->xlab_user.precis,
3002 &stroff) == 7 && stroff != 0){
3003 strncpy(im->xlab_form, optarg+stroff, sizeof(im->xlab_form) - 1);
3004 im->xlab_form[sizeof(im->xlab_form)-1] = '\0';
3005 if((int)(im->xlab_user.gridtm = tmt_conv(scan_gtm)) == -1){
3006 rrd_set_error("unknown keyword %s",scan_gtm);
3008 } else if ((int)(im->xlab_user.mgridtm = tmt_conv(scan_mtm)) == -1){
3009 rrd_set_error("unknown keyword %s",scan_mtm);
3011 } else if ((int)(im->xlab_user.labtm = tmt_conv(scan_ltm)) == -1){
3012 rrd_set_error("unknown keyword %s",scan_ltm);
3015 im->xlab_user.minsec = 1;
3016 im->xlab_user.stst = im->xlab_form;
3018 rrd_set_error("invalid x-grid format");
3024 if(strcmp(optarg,"none") == 0){
3032 &im->ylabfact) == 2) {
3033 if(im->ygridstep<=0){
3034 rrd_set_error("grid step must be > 0");
3036 } else if (im->ylabfact < 1){
3037 rrd_set_error("label factor must be > 0");
3041 rrd_set_error("invalid y-grid format");
3046 strncpy(im->ylegend,optarg,150);
3047 im->ylegend[150]='\0';
3050 im->maxval = atof(optarg);
3053 im->minval = atof(optarg);
3056 im->base = atol(optarg);
3057 if(im->base != 1024 && im->base != 1000 ){
3058 rrd_set_error("the only sensible value for base apart from 1000 is 1024");
3063 long_tmp = atol(optarg);
3064 if (long_tmp < 10) {
3065 rrd_set_error("width below 10 pixels");
3068 im->xsize = long_tmp;
3071 long_tmp = atol(optarg);
3072 if (long_tmp < 10) {
3073 rrd_set_error("height below 10 pixels");
3076 im->ysize = long_tmp;
3079 im->canvas->interlaced = 1;
3085 im->imginfo = optarg;
3088 if((int)(im->canvas->imgformat = if_conv(optarg)) == -1) {
3089 rrd_set_error("unsupported graphics format '%s'",optarg);
3101 im->logarithmic = 1;
3102 if (isnan(im->minval))
3107 "%10[A-Z]#%n%8lx%n",
3108 col_nam,&col_start,&color,&col_end) == 2){
3110 int col_len = col_end - col_start;
3114 ((color & 0xF00) * 0x110000) |
3115 ((color & 0x0F0) * 0x011000) |
3116 ((color & 0x00F) * 0x001100) |
3122 ((color & 0xF000) * 0x11000) |
3123 ((color & 0x0F00) * 0x01100) |
3124 ((color & 0x00F0) * 0x00110) |
3125 ((color & 0x000F) * 0x00011)
3129 color = (color << 8) + 0xff /* shift left by 8 */;
3134 rrd_set_error("the color format is #RRGGBB[AA]");
3137 if((ci=grc_conv(col_nam)) != -1){
3138 im->graph_col[ci]=color;
3140 rrd_set_error("invalid color name '%s'",col_nam);
3144 rrd_set_error("invalid color def format");
3154 "%10[A-Z]:%lf:%1000s",
3155 prop,&size,font) == 3){
3157 if((sindex=text_prop_conv(prop)) != -1){
3158 for (propidx=sindex;propidx<TEXT_PROP_LAST;propidx++){
3160 im->text_prop[propidx].size=size;
3162 if (strlen(font) > 0){
3163 strcpy(im->text_prop[propidx].font,font);
3165 if (propidx==sindex && sindex != 0) break;
3168 rrd_set_error("invalid fonttag '%s'",prop);
3172 rrd_set_error("invalid text property format");
3178 im->canvas->zoom = atof(optarg);
3179 if (im->canvas->zoom <= 0.0) {
3180 rrd_set_error("zoom factor must be > 0");
3185 strncpy(im->title,optarg,150);
3186 im->title[150]='\0';
3190 if ( strcmp( optarg, "normal" ) == 0 )
3191 im->canvas->aa_type = AA_NORMAL;
3192 else if ( strcmp( optarg, "light" ) == 0 )
3193 im->canvas->aa_type = AA_LIGHT;
3194 else if ( strcmp( optarg, "mono" ) == 0 )
3195 im->canvas->aa_type = AA_NONE;
3198 rrd_set_error("unknown font-render-mode '%s'", optarg );
3204 im->canvas->font_aa_threshold = atof(optarg);
3209 rrd_set_error("unknown option '%c'", optopt);
3211 rrd_set_error("unknown option '%s'",argv[optind-1]);
3216 if (optind >= argc) {
3217 rrd_set_error("missing filename");
3221 if (im->logarithmic == 1 && (im->minval <= 0 || isnan(im->minval))){
3222 rrd_set_error("for a logarithmic yaxis you must specify a lower-limit > 0");
3226 if (proc_start_end(&start_tv,&end_tv,&start_tmp,&end_tmp) == -1){
3227 /* error string is set in parsetime.c */
3231 if (start_tmp < 3600*24*365*10){
3232 rrd_set_error("the first entry to fetch should be after 1980 (%ld)",start_tmp);
3236 if (end_tmp < start_tmp) {
3237 rrd_set_error("start (%ld) should be less than end (%ld)",
3238 start_tmp, end_tmp);
3242 im->start = start_tmp;
3244 im->step = max((long)im->step, (im->end-im->start)/im->xsize);
3248 rrd_graph_check_vname(image_desc_t *im, char *varname, char *err)
3250 if ((im->gdes[im->gdes_c-1].vidx=find_var(im,varname))==-1) {
3251 rrd_set_error("Unknown variable '%s' in %s",varname,err);
3257 rrd_graph_color(image_desc_t *im, char *var, char *err, int optional)
3260 graph_desc_t *gdp=&im->gdes[im->gdes_c-1];
3262 color=strstr(var,"#");
3265 rrd_set_error("Found no color in %s",err);
3274 rest=strstr(color,":");
3282 sscanf(color,"#%6lx%n",&col,&n);
3283 col = (col << 8) + 0xff /* shift left by 8 */;
3284 if (n!=7) rrd_set_error("Color problem in %s",err);
3287 sscanf(color,"#%8lx%n",&col,&n);
3290 rrd_set_error("Color problem in %s",err);
3292 if (rrd_test_error()) return 0;
3299 int bad_format(char *fmt) {
3303 while (*ptr != '\0')
3304 if (*ptr++ == '%') {
3306 /* line cannot end with percent char */
3307 if (*ptr == '\0') return 1;
3309 /* '%s', '%S' and '%%' are allowed */
3310 if (*ptr == 's' || *ptr == 'S' || *ptr == '%') ptr++;
3312 /* or else '% 6.2lf' and such are allowed */
3315 /* optional padding character */
3316 if (*ptr == ' ' || *ptr == '+' || *ptr == '-') ptr++;
3318 /* This should take care of 'm.n' with all three optional */
3319 while (*ptr >= '0' && *ptr <= '9') ptr++;
3320 if (*ptr == '.') ptr++;
3321 while (*ptr >= '0' && *ptr <= '9') ptr++;
3323 /* Either 'le', 'lf' or 'lg' must follow here */
3324 if (*ptr++ != 'l') return 1;
3325 if (*ptr == 'e' || *ptr == 'f' || *ptr == 'g') ptr++;
3336 vdef_parse(gdes,str)
3337 struct graph_desc_t *gdes;
3340 /* A VDEF currently is either "func" or "param,func"
3341 * so the parsing is rather simple. Change if needed.
3348 sscanf(str,"%le,%29[A-Z]%n",¶m,func,&n);
3349 if (n== (int)strlen(str)) { /* matched */
3353 sscanf(str,"%29[A-Z]%n",func,&n);
3354 if (n== (int)strlen(str)) { /* matched */
3357 rrd_set_error("Unknown function string '%s' in VDEF '%s'"
3364 if (!strcmp("PERCENT",func)) gdes->vf.op = VDEF_PERCENT;
3365 else if (!strcmp("MAXIMUM",func)) gdes->vf.op = VDEF_MAXIMUM;
3366 else if (!strcmp("AVERAGE",func)) gdes->vf.op = VDEF_AVERAGE;
3367 else if (!strcmp("MINIMUM",func)) gdes->vf.op = VDEF_MINIMUM;
3368 else if (!strcmp("TOTAL", func)) gdes->vf.op = VDEF_TOTAL;
3369 else if (!strcmp("FIRST", func)) gdes->vf.op = VDEF_FIRST;
3370 else if (!strcmp("LAST", func)) gdes->vf.op = VDEF_LAST;
3372 rrd_set_error("Unknown function '%s' in VDEF '%s'\n"
3379 switch (gdes->vf.op) {
3381 if (isnan(param)) { /* no parameter given */
3382 rrd_set_error("Function '%s' needs parameter in VDEF '%s'\n"
3388 if (param>=0.0 && param<=100.0) {
3389 gdes->vf.param = param;
3390 gdes->vf.val = DNAN; /* undefined */
3391 gdes->vf.when = 0; /* undefined */
3393 rrd_set_error("Parameter '%f' out of range in VDEF '%s'\n"
3407 gdes->vf.param = DNAN;
3408 gdes->vf.val = DNAN;
3411 rrd_set_error("Function '%s' needs no parameter in VDEF '%s'\n"
3428 graph_desc_t *src,*dst;
3432 dst = &im->gdes[gdi];
3433 src = &im->gdes[dst->vidx];
3434 data = src->data + src->ds;
3435 steps = (src->end - src->start) / src->step;
3438 printf("DEBUG: start == %lu, end == %lu, %lu steps\n"
3445 switch (dst->vf.op) {
3446 case VDEF_PERCENT: {
3447 rrd_value_t * array;
3451 if ((array = malloc(steps*sizeof(double)))==NULL) {
3452 rrd_set_error("malloc VDEV_PERCENT");
3455 for (step=0;step < steps; step++) {
3456 array[step]=data[step*src->ds_cnt];
3458 qsort(array,step,sizeof(double),vdef_percent_compar);
3460 field = (steps-1)*dst->vf.param/100;
3461 dst->vf.val = array[field];
3462 dst->vf.when = 0; /* no time component */
3465 for(step=0;step<steps;step++)
3466 printf("DEBUG: %3li:%10.2f %c\n",step,array[step],step==field?'*':' ');
3472 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3473 if (step == steps) {
3477 dst->vf.val = data[step*src->ds_cnt];
3478 dst->vf.when = src->start + (step+1)*src->step;
3480 while (step != steps) {
3481 if (finite(data[step*src->ds_cnt])) {
3482 if (data[step*src->ds_cnt] > dst->vf.val) {
3483 dst->vf.val = data[step*src->ds_cnt];
3484 dst->vf.when = src->start + (step+1)*src->step;
3491 case VDEF_AVERAGE: {
3494 for (step=0;step<steps;step++) {
3495 if (finite(data[step*src->ds_cnt])) {
3496 sum += data[step*src->ds_cnt];
3501 if (dst->vf.op == VDEF_TOTAL) {
3502 dst->vf.val = sum*src->step;
3503 dst->vf.when = cnt*src->step; /* not really "when" */
3505 dst->vf.val = sum/cnt;
3506 dst->vf.when = 0; /* no time component */
3516 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3517 if (step == steps) {
3521 dst->vf.val = data[step*src->ds_cnt];
3522 dst->vf.when = src->start + (step+1)*src->step;
3524 while (step != steps) {
3525 if (finite(data[step*src->ds_cnt])) {
3526 if (data[step*src->ds_cnt] < dst->vf.val) {
3527 dst->vf.val = data[step*src->ds_cnt];
3528 dst->vf.when = src->start + (step+1)*src->step;
3535 /* The time value returned here is one step before the
3536 * actual time value. This is the start of the first
3540 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3541 if (step == steps) { /* all entries were NaN */
3545 dst->vf.val = data[step*src->ds_cnt];
3546 dst->vf.when = src->start + step*src->step;
3550 /* The time value returned here is the
3551 * actual time value. This is the end of the last
3555 while (step >= 0 && isnan(data[step*src->ds_cnt])) step--;
3556 if (step < 0) { /* all entries were NaN */
3560 dst->vf.val = data[step*src->ds_cnt];
3561 dst->vf.when = src->start + (step+1)*src->step;
3568 /* NaN < -INF < finite_values < INF */
3570 vdef_percent_compar(a,b)
3573 /* Equality is not returned; this doesn't hurt except
3574 * (maybe) for a little performance.
3577 /* First catch NaN values. They are smallest */
3578 if (isnan( *(double *)a )) return -1;
3579 if (isnan( *(double *)b )) return 1;
3581 /* NaN doesn't reach this part so INF and -INF are extremes.
3582 * The sign from isinf() is compatible with the sign we return
3584 if (isinf( *(double *)a )) return isinf( *(double *)a );
3585 if (isinf( *(double *)b )) return isinf( *(double *)b );
3587 /* If we reach this, both values must be finite */
3588 if ( *(double *)a < *(double *)b ) return -1; else return 1;