1 /****************************************************************************
2 * RRDtool 1.2.17 Copyright by Tobi Oetiker, 1997-2006
3 ****************************************************************************
4 * rrd__graph.c produce graphs from data in rrdfiles
5 ****************************************************************************/
15 #if defined(WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
28 #include "rrd_graph.h"
30 /* some constant definitions */
34 #ifndef RRD_DEFAULT_FONT
35 /* there is special code later to pick Cour.ttf when running on windows */
36 #define RRD_DEFAULT_FONT "DejaVuSansMono-Roman.ttf"
39 text_prop_t text_prop[] = {
40 { 8.0, RRD_DEFAULT_FONT }, /* default */
41 { 9.0, RRD_DEFAULT_FONT }, /* title */
42 { 7.0, RRD_DEFAULT_FONT }, /* axis */
43 { 8.0, RRD_DEFAULT_FONT }, /* unit */
44 { 8.0, RRD_DEFAULT_FONT } /* legend */
48 {0, 0, TMT_SECOND,30, TMT_MINUTE,5, TMT_MINUTE,5, 0,"%H:%M"},
49 {2, 0, TMT_MINUTE,1, TMT_MINUTE,5, TMT_MINUTE,5, 0,"%H:%M"},
50 {5, 0, TMT_MINUTE,2, TMT_MINUTE,10, TMT_MINUTE,10, 0,"%H:%M"},
51 {10, 0, TMT_MINUTE,5, TMT_MINUTE,20, TMT_MINUTE,20, 0,"%H:%M"},
52 {30, 0, TMT_MINUTE,10, TMT_HOUR,1, TMT_HOUR,1, 0,"%H:%M"},
53 {60, 0, TMT_MINUTE,30, TMT_HOUR,2, TMT_HOUR,2, 0,"%H:%M"},
54 {60, 24*3600, TMT_MINUTE,30, TMT_HOUR,2, TMT_HOUR,4, 0,"%a %H:%M"},
55 {180, 0, TMT_HOUR,1, TMT_HOUR,6, TMT_HOUR,6, 0,"%H:%M"},
56 {180, 24*3600, TMT_HOUR,1, TMT_HOUR,6, TMT_HOUR,12, 0,"%a %H:%M"},
57 /*{300, 0, TMT_HOUR,3, TMT_HOUR,12, TMT_HOUR,12, 12*3600,"%a %p"}, this looks silly*/
58 {600, 0, TMT_HOUR,6, TMT_DAY,1, TMT_DAY,1, 24*3600,"%a"},
59 {1200, 0, TMT_HOUR,6, TMT_DAY,1, TMT_DAY,1, 24*3600,"%d"},
60 {1800, 0, TMT_HOUR,12, TMT_DAY,1, TMT_DAY,2, 24*3600,"%a %d"},
61 {2400, 0, TMT_HOUR,12, TMT_DAY,1, TMT_DAY,2, 24*3600,"%a"},
62 {3600, 0, TMT_DAY,1, TMT_WEEK,1, TMT_WEEK,1, 7*24*3600,"Week %V"},
63 {3*3600, 0, TMT_WEEK,1, TMT_MONTH,1, TMT_WEEK,2, 7*24*3600,"Week %V"},
64 {6*3600, 0, TMT_MONTH,1, TMT_MONTH,1, TMT_MONTH,1, 30*24*3600,"%b"},
65 {48*3600, 0, TMT_MONTH,1, TMT_MONTH,3, TMT_MONTH,3, 30*24*3600,"%b"},
66 {315360, 0, TMT_MONTH,3, TMT_YEAR,1, TMT_YEAR,1, 365*24*3600,"%Y"},
67 {10*24*3600, 0, TMT_YEAR,1, TMT_YEAR,1, TMT_YEAR,1, 365*24*3600,"%y"},
68 {-1,0,TMT_MONTH,0,TMT_MONTH,0,TMT_MONTH,0,0,""}
71 /* sensible y label intervals ...*/
89 gfx_color_t graph_col[] = /* default colors */
90 { 0xFFFFFFFF, /* canvas */
91 0xF0F0F0FF, /* background */
92 0xD0D0D0FF, /* shade A */
93 0xA0A0A0FF, /* shade B */
94 0x90909080, /* grid */
95 0xE0505080, /* major grid */
96 0x000000FF, /* font */
97 0x802020FF, /* arrow */
98 0x202020FF, /* axis */
99 0x000000FF /* frame */
106 # define DPRINT(x) (void)(printf x, printf("\n"))
112 /* initialize with xtr(im,0); */
114 xtr(image_desc_t *im,time_t mytime){
117 pixie = (double) im->xsize / (double)(im->end - im->start);
120 return (int)((double)im->xorigin
121 + pixie * ( mytime - im->start ) );
124 /* translate data values into y coordinates */
126 ytr(image_desc_t *im, double value){
131 pixie = (double) im->ysize / (im->maxval - im->minval);
133 pixie = (double) im->ysize / (log10(im->maxval) - log10(im->minval));
135 } else if(!im->logarithmic) {
136 yval = im->yorigin - pixie * (value - im->minval);
138 if (value < im->minval) {
141 yval = im->yorigin - pixie * (log10(value) - log10(im->minval));
144 /* make sure we don't return anything too unreasonable. GD lib can
145 get terribly slow when drawing lines outside its scope. This is
146 especially problematic in connection with the rigid option */
148 /* keep yval as-is */
149 } else if (yval > im->yorigin) {
150 yval = im->yorigin +0.00001;
151 } else if (yval < im->yorigin - im->ysize){
152 yval = im->yorigin - im->ysize - 0.00001;
159 /* conversion function for symbolic entry names */
162 #define conv_if(VV,VVV) \
163 if (strcmp(#VV, string) == 0) return VVV ;
165 enum gf_en gf_conv(char *string){
167 conv_if(PRINT,GF_PRINT)
168 conv_if(GPRINT,GF_GPRINT)
169 conv_if(COMMENT,GF_COMMENT)
170 conv_if(HRULE,GF_HRULE)
171 conv_if(VRULE,GF_VRULE)
172 conv_if(LINE,GF_LINE)
173 conv_if(AREA,GF_AREA)
174 conv_if(STACK,GF_STACK)
175 conv_if(TICK,GF_TICK)
177 conv_if(CDEF,GF_CDEF)
178 conv_if(VDEF,GF_VDEF)
180 conv_if(PART,GF_PART)
182 conv_if(XPORT,GF_XPORT)
183 conv_if(SHIFT,GF_SHIFT)
188 enum gfx_if_en if_conv(char *string){
198 enum tmt_en tmt_conv(char *string){
200 conv_if(SECOND,TMT_SECOND)
201 conv_if(MINUTE,TMT_MINUTE)
202 conv_if(HOUR,TMT_HOUR)
204 conv_if(WEEK,TMT_WEEK)
205 conv_if(MONTH,TMT_MONTH)
206 conv_if(YEAR,TMT_YEAR)
210 enum grc_en grc_conv(char *string){
212 conv_if(BACK,GRC_BACK)
213 conv_if(CANVAS,GRC_CANVAS)
214 conv_if(SHADEA,GRC_SHADEA)
215 conv_if(SHADEB,GRC_SHADEB)
216 conv_if(GRID,GRC_GRID)
217 conv_if(MGRID,GRC_MGRID)
218 conv_if(FONT,GRC_FONT)
219 conv_if(ARROW,GRC_ARROW)
220 conv_if(AXIS,GRC_AXIS)
221 conv_if(FRAME,GRC_FRAME)
226 enum text_prop_en text_prop_conv(char *string){
228 conv_if(DEFAULT,TEXT_PROP_DEFAULT)
229 conv_if(TITLE,TEXT_PROP_TITLE)
230 conv_if(AXIS,TEXT_PROP_AXIS)
231 conv_if(UNIT,TEXT_PROP_UNIT)
232 conv_if(LEGEND,TEXT_PROP_LEGEND)
240 im_free(image_desc_t *im)
244 if (im == NULL) return 0;
245 for(i=0;i<(unsigned)im->gdes_c;i++){
246 if (im->gdes[i].data_first){
247 /* careful here, because a single pointer can occur several times */
248 free (im->gdes[i].data);
249 if (im->gdes[i].ds_namv){
250 for (ii=0;ii<im->gdes[i].ds_cnt;ii++)
251 free(im->gdes[i].ds_namv[ii]);
252 free(im->gdes[i].ds_namv);
255 free (im->gdes[i].p_data);
256 free (im->gdes[i].rpnp);
259 gfx_destroy(im->canvas);
263 /* find SI magnitude symbol for the given number*/
266 image_desc_t *im, /* image description */
273 char *symbol[] = {"a", /* 10e-18 Atto */
274 "f", /* 10e-15 Femto */
275 "p", /* 10e-12 Pico */
276 "n", /* 10e-9 Nano */
277 "u", /* 10e-6 Micro */
278 "m", /* 10e-3 Milli */
283 "T", /* 10e12 Tera */
284 "P", /* 10e15 Peta */
290 if (*value == 0.0 || isnan(*value) ) {
294 sindex = floor(log(fabs(*value))/log((double)im->base));
295 *magfact = pow((double)im->base, (double)sindex);
296 (*value) /= (*magfact);
298 if ( sindex <= symbcenter && sindex >= -symbcenter) {
299 (*symb_ptr) = symbol[sindex+symbcenter];
307 static char si_symbol[] = {
308 'a', /* 10e-18 Atto */
309 'f', /* 10e-15 Femto */
310 'p', /* 10e-12 Pico */
311 'n', /* 10e-9 Nano */
312 'u', /* 10e-6 Micro */
313 'm', /* 10e-3 Milli */
318 'T', /* 10e12 Tera */
319 'P', /* 10e15 Peta */
322 static const int si_symbcenter = 6;
324 /* find SI magnitude symbol for the numbers on the y-axis*/
327 image_desc_t *im /* image description */
331 double digits,viewdigits=0;
333 digits = floor( log( max( fabs(im->minval),fabs(im->maxval)))/log((double)im->base));
335 if (im->unitsexponent != 9999) {
336 /* unitsexponent = 9, 6, 3, 0, -3, -6, -9, etc */
337 viewdigits = floor(im->unitsexponent / 3);
342 im->magfact = pow((double)im->base , digits);
345 printf("digits %6.3f im->magfact %6.3f\n",digits,im->magfact);
348 im->viewfactor = im->magfact / pow((double)im->base , viewdigits);
350 if ( ((viewdigits+si_symbcenter) < sizeof(si_symbol)) &&
351 ((viewdigits+si_symbcenter) >= 0) )
352 im->symbol = si_symbol[(int)viewdigits+si_symbcenter];
357 /* move min and max values around to become sensible */
360 expand_range(image_desc_t *im)
362 double sensiblevalues[] ={1000.0,900.0,800.0,750.0,700.0,
363 600.0,500.0,400.0,300.0,250.0,
364 200.0,125.0,100.0,90.0,80.0,
365 75.0,70.0,60.0,50.0,40.0,30.0,
366 25.0,20.0,10.0,9.0,8.0,
367 7.0,6.0,5.0,4.0,3.5,3.0,
368 2.5,2.0,1.8,1.5,1.2,1.0,
369 0.8,0.7,0.6,0.5,0.4,0.3,0.2,0.1,0.0,-1};
371 double scaled_min,scaled_max;
378 printf("Min: %6.2f Max: %6.2f MagFactor: %6.2f\n",
379 im->minval,im->maxval,im->magfact);
382 if (isnan(im->ygridstep)){
383 if(im->extra_flags & ALTAUTOSCALE) {
384 /* measure the amplitude of the function. Make sure that
385 graph boundaries are slightly higher then max/min vals
386 so we can see amplitude on the graph */
389 delt = im->maxval - im->minval;
391 fact = 2.0 * pow(10.0,
392 floor(log10(max(fabs(im->minval), fabs(im->maxval))/im->magfact)) - 2);
394 adj = (fact - delt) * 0.55;
396 printf("Min: %6.2f Max: %6.2f delt: %6.2f fact: %6.2f adj: %6.2f\n", im->minval, im->maxval, delt, fact, adj);
402 else if(im->extra_flags & ALTAUTOSCALE_MAX) {
403 /* measure the amplitude of the function. Make sure that
404 graph boundaries are slightly higher than max vals
405 so we can see amplitude on the graph */
406 adj = (im->maxval - im->minval) * 0.1;
410 scaled_min = im->minval / im->magfact;
411 scaled_max = im->maxval / im->magfact;
413 for (i=1; sensiblevalues[i] > 0; i++){
414 if (sensiblevalues[i-1]>=scaled_min &&
415 sensiblevalues[i]<=scaled_min)
416 im->minval = sensiblevalues[i]*(im->magfact);
418 if (-sensiblevalues[i-1]<=scaled_min &&
419 -sensiblevalues[i]>=scaled_min)
420 im->minval = -sensiblevalues[i-1]*(im->magfact);
422 if (sensiblevalues[i-1] >= scaled_max &&
423 sensiblevalues[i] <= scaled_max)
424 im->maxval = sensiblevalues[i-1]*(im->magfact);
426 if (-sensiblevalues[i-1]<=scaled_max &&
427 -sensiblevalues[i] >=scaled_max)
428 im->maxval = -sensiblevalues[i]*(im->magfact);
432 /* adjust min and max to the grid definition if there is one */
433 im->minval = (double)im->ylabfact * im->ygridstep *
434 floor(im->minval / ((double)im->ylabfact * im->ygridstep));
435 im->maxval = (double)im->ylabfact * im->ygridstep *
436 ceil(im->maxval /( (double)im->ylabfact * im->ygridstep));
440 fprintf(stderr,"SCALED Min: %6.2f Max: %6.2f Factor: %6.2f\n",
441 im->minval,im->maxval,im->magfact);
446 apply_gridfit(image_desc_t *im)
448 if (isnan(im->minval) || isnan(im->maxval))
451 if (im->logarithmic) {
452 double ya, yb, ypix, ypixfrac;
453 double log10_range = log10(im->maxval) - log10(im->minval);
454 ya = pow((double)10, floor(log10(im->minval)));
455 while (ya < im->minval)
458 return; /* don't have y=10^x gridline */
460 if (yb <= im->maxval) {
461 /* we have at least 2 y=10^x gridlines.
462 Make sure distance between them in pixels
463 are an integer by expanding im->maxval */
464 double y_pixel_delta = ytr(im, ya) - ytr(im, yb);
465 double factor = y_pixel_delta / floor(y_pixel_delta);
466 double new_log10_range = factor * log10_range;
467 double new_ymax_log10 = log10(im->minval) + new_log10_range;
468 im->maxval = pow(10, new_ymax_log10);
469 ytr(im,DNAN); /* reset precalc */
470 log10_range = log10(im->maxval) - log10(im->minval);
472 /* make sure first y=10^x gridline is located on
473 integer pixel position by moving scale slightly
474 downwards (sub-pixel movement) */
475 ypix = ytr(im, ya) + im->ysize; /* add im->ysize so it always is positive */
476 ypixfrac = ypix - floor(ypix);
477 if (ypixfrac > 0 && ypixfrac < 1) {
478 double yfrac = ypixfrac / im->ysize;
479 im->minval = pow(10, log10(im->minval) - yfrac * log10_range);
480 im->maxval = pow(10, log10(im->maxval) - yfrac * log10_range);
481 ytr(im,DNAN); /* reset precalc */
484 /* Make sure we have an integer pixel distance between
485 each minor gridline */
486 double ypos1 = ytr(im, im->minval);
487 double ypos2 = ytr(im, im->minval + im->ygrid_scale.gridstep);
488 double y_pixel_delta = ypos1 - ypos2;
489 double factor = y_pixel_delta / floor(y_pixel_delta);
490 double new_range = factor * (im->maxval - im->minval);
491 double gridstep = im->ygrid_scale.gridstep;
492 double minor_y, minor_y_px, minor_y_px_frac;
493 im->maxval = im->minval + new_range;
494 ytr(im,DNAN); /* reset precalc */
495 /* make sure first minor gridline is on integer pixel y coord */
496 minor_y = gridstep * floor(im->minval / gridstep);
497 while (minor_y < im->minval)
499 minor_y_px = ytr(im, minor_y) + im->ysize; /* ensure > 0 by adding ysize */
500 minor_y_px_frac = minor_y_px - floor(minor_y_px);
501 if (minor_y_px_frac > 0 && minor_y_px_frac < 1) {
502 double yfrac = minor_y_px_frac / im->ysize;
503 double range = im->maxval - im->minval;
504 im->minval = im->minval - yfrac * range;
505 im->maxval = im->maxval - yfrac * range;
506 ytr(im,DNAN); /* reset precalc */
508 calc_horizontal_grid(im); /* recalc with changed im->maxval */
512 /* reduce data reimplementation by Alex */
516 enum cf_en cf, /* which consolidation function ?*/
517 unsigned long cur_step, /* step the data currently is in */
518 time_t *start, /* start, end and step as requested ... */
519 time_t *end, /* ... by the application will be ... */
520 unsigned long *step, /* ... adjusted to represent reality */
521 unsigned long *ds_cnt, /* number of data sources in file */
522 rrd_value_t **data) /* two dimensional array containing the data */
524 int i,reduce_factor = ceil((double)(*step) / (double)cur_step);
525 unsigned long col,dst_row,row_cnt,start_offset,end_offset,skiprows=0;
526 rrd_value_t *srcptr,*dstptr;
528 (*step) = cur_step*reduce_factor; /* set new step size for reduced data */
531 row_cnt = ((*end)-(*start))/cur_step;
537 printf("Reducing %lu rows with factor %i time %lu to %lu, step %lu\n",
538 row_cnt,reduce_factor,*start,*end,cur_step);
539 for (col=0;col<row_cnt;col++) {
540 printf("time %10lu: ",*start+(col+1)*cur_step);
541 for (i=0;i<*ds_cnt;i++)
542 printf(" %8.2e",srcptr[*ds_cnt*col+i]);
547 /* We have to combine [reduce_factor] rows of the source
548 ** into one row for the destination. Doing this we also
549 ** need to take care to combine the correct rows. First
550 ** alter the start and end time so that they are multiples
551 ** of the new step time. We cannot reduce the amount of
552 ** time so we have to move the end towards the future and
553 ** the start towards the past.
555 end_offset = (*end) % (*step);
556 start_offset = (*start) % (*step);
558 /* If there is a start offset (which cannot be more than
559 ** one destination row), skip the appropriate number of
560 ** source rows and one destination row. The appropriate
561 ** number is what we do know (start_offset/cur_step) of
562 ** the new interval (*step/cur_step aka reduce_factor).
565 printf("start_offset: %lu end_offset: %lu\n",start_offset,end_offset);
566 printf("row_cnt before: %lu\n",row_cnt);
569 (*start) = (*start)-start_offset;
570 skiprows=reduce_factor-start_offset/cur_step;
571 srcptr+=skiprows* *ds_cnt;
572 for (col=0;col<(*ds_cnt);col++) *dstptr++ = DNAN;
576 printf("row_cnt between: %lu\n",row_cnt);
579 /* At the end we have some rows that are not going to be
580 ** used, the amount is end_offset/cur_step
583 (*end) = (*end)-end_offset+(*step);
584 skiprows = end_offset/cur_step;
588 printf("row_cnt after: %lu\n",row_cnt);
591 /* Sanity check: row_cnt should be multiple of reduce_factor */
592 /* if this gets triggered, something is REALLY WRONG ... we die immediately */
594 if (row_cnt%reduce_factor) {
595 printf("SANITY CHECK: %lu rows cannot be reduced by %i \n",
596 row_cnt,reduce_factor);
597 printf("BUG in reduce_data()\n");
601 /* Now combine reduce_factor intervals at a time
602 ** into one interval for the destination.
605 for (dst_row=0;(long int)row_cnt>=reduce_factor;dst_row++) {
606 for (col=0;col<(*ds_cnt);col++) {
607 rrd_value_t newval=DNAN;
608 unsigned long validval=0;
610 for (i=0;i<reduce_factor;i++) {
611 if (isnan(srcptr[i*(*ds_cnt)+col])) {
615 if (isnan(newval)) newval = srcptr[i*(*ds_cnt)+col];
623 newval += srcptr[i*(*ds_cnt)+col];
626 newval = min (newval,srcptr[i*(*ds_cnt)+col]);
629 /* an interval contains a failure if any subintervals contained a failure */
631 newval = max (newval,srcptr[i*(*ds_cnt)+col]);
634 newval = srcptr[i*(*ds_cnt)+col];
639 if (validval == 0){newval = DNAN;} else{
657 srcptr+=(*ds_cnt)*reduce_factor;
658 row_cnt-=reduce_factor;
660 /* If we had to alter the endtime, we didn't have enough
661 ** source rows to fill the last row. Fill it with NaN.
663 if (end_offset) for (col=0;col<(*ds_cnt);col++) *dstptr++ = DNAN;
665 row_cnt = ((*end)-(*start))/ *step;
667 printf("Done reducing. Currently %lu rows, time %lu to %lu, step %lu\n",
668 row_cnt,*start,*end,*step);
669 for (col=0;col<row_cnt;col++) {
670 printf("time %10lu: ",*start+(col+1)*(*step));
671 for (i=0;i<*ds_cnt;i++)
672 printf(" %8.2e",srcptr[*ds_cnt*col+i]);
679 /* get the data required for the graphs from the
683 data_fetch(image_desc_t *im )
688 /* pull the data from the rrd files ... */
689 for (i=0;i< (int)im->gdes_c;i++){
690 /* only GF_DEF elements fetch data */
691 if (im->gdes[i].gf != GF_DEF)
695 /* do we have it already ?*/
696 for (ii=0;ii<i;ii++) {
697 if (im->gdes[ii].gf != GF_DEF)
699 if ((strcmp(im->gdes[i].rrd, im->gdes[ii].rrd) == 0)
700 && (im->gdes[i].cf == im->gdes[ii].cf)
701 && (im->gdes[i].cf_reduce == im->gdes[ii].cf_reduce)
702 && (im->gdes[i].start_orig == im->gdes[ii].start_orig)
703 && (im->gdes[i].end_orig == im->gdes[ii].end_orig)
704 && (im->gdes[i].step_orig == im->gdes[ii].step_orig)) {
705 /* OK, the data is already there.
706 ** Just copy the header portion
708 im->gdes[i].start = im->gdes[ii].start;
709 im->gdes[i].end = im->gdes[ii].end;
710 im->gdes[i].step = im->gdes[ii].step;
711 im->gdes[i].ds_cnt = im->gdes[ii].ds_cnt;
712 im->gdes[i].ds_namv = im->gdes[ii].ds_namv;
713 im->gdes[i].data = im->gdes[ii].data;
714 im->gdes[i].data_first = 0;
721 unsigned long ft_step = im->gdes[i].step ; /* ft_step will record what we got from fetch */
723 if((rrd_fetch_fn(im->gdes[i].rrd,
729 &im->gdes[i].ds_namv,
730 &im->gdes[i].data)) == -1){
733 im->gdes[i].data_first = 1;
735 if (ft_step < im->gdes[i].step) {
736 reduce_data(im->gdes[i].cf_reduce,
744 im->gdes[i].step = ft_step;
748 /* lets see if the required data source is really there */
749 for(ii=0;ii<(int)im->gdes[i].ds_cnt;ii++){
750 if(strcmp(im->gdes[i].ds_namv[ii],im->gdes[i].ds_nam) == 0){
753 if (im->gdes[i].ds== -1){
754 rrd_set_error("No DS called '%s' in '%s'",
755 im->gdes[i].ds_nam,im->gdes[i].rrd);
763 /* evaluate the expressions in the CDEF functions */
765 /*************************************************************
767 *************************************************************/
770 find_var_wrapper(void *arg1, char *key)
772 return find_var((image_desc_t *) arg1, key);
775 /* find gdes containing var*/
777 find_var(image_desc_t *im, char *key){
779 for(ii=0;ii<im->gdes_c-1;ii++){
780 if((im->gdes[ii].gf == GF_DEF
781 || im->gdes[ii].gf == GF_VDEF
782 || im->gdes[ii].gf == GF_CDEF)
783 && (strcmp(im->gdes[ii].vname,key) == 0)){
790 /* find the largest common denominator for all the numbers
791 in the 0 terminated num array */
796 for (i=0;num[i+1]!=0;i++){
798 rest=num[i] % num[i+1];
799 num[i]=num[i+1]; num[i+1]=rest;
803 /* return i==0?num[i]:num[i-1]; */
807 /* run the rpn calculator on all the VDEF and CDEF arguments */
809 data_calc( image_desc_t *im){
813 long *steparray, rpi;
818 rpnstack_init(&rpnstack);
820 for (gdi=0;gdi<im->gdes_c;gdi++){
821 /* Look for GF_VDEF and GF_CDEF in the same loop,
822 * so CDEFs can use VDEFs and vice versa
824 switch (im->gdes[gdi].gf) {
828 graph_desc_t *vdp = &im->gdes[im->gdes[gdi].vidx];
830 /* remove current shift */
831 vdp->start -= vdp->shift;
832 vdp->end -= vdp->shift;
835 if (im->gdes[gdi].shidx >= 0)
836 vdp->shift = im->gdes[im->gdes[gdi].shidx].vf.val;
839 vdp->shift = im->gdes[gdi].shval;
841 /* normalize shift to multiple of consolidated step */
842 vdp->shift = (vdp->shift / (long)vdp->step) * (long)vdp->step;
845 vdp->start += vdp->shift;
846 vdp->end += vdp->shift;
850 /* A VDEF has no DS. This also signals other parts
851 * of rrdtool that this is a VDEF value, not a CDEF.
853 im->gdes[gdi].ds_cnt = 0;
854 if (vdef_calc(im,gdi)) {
855 rrd_set_error("Error processing VDEF '%s'"
858 rpnstack_free(&rpnstack);
863 im->gdes[gdi].ds_cnt = 1;
864 im->gdes[gdi].ds = 0;
865 im->gdes[gdi].data_first = 1;
866 im->gdes[gdi].start = 0;
867 im->gdes[gdi].end = 0;
872 /* Find the variables in the expression.
873 * - VDEF variables are substituted by their values
874 * and the opcode is changed into OP_NUMBER.
875 * - CDEF variables are analized for their step size,
876 * the lowest common denominator of all the step
877 * sizes of the data sources involved is calculated
878 * and the resulting number is the step size for the
879 * resulting data source.
881 for(rpi=0;im->gdes[gdi].rpnp[rpi].op != OP_END;rpi++){
882 if(im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
883 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER){
884 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
885 if (im->gdes[ptr].ds_cnt == 0) { /* this is a VDEF data source */
887 printf("DEBUG: inside CDEF '%s' processing VDEF '%s'\n",
889 im->gdes[ptr].vname);
890 printf("DEBUG: value from vdef is %f\n",im->gdes[ptr].vf.val);
892 im->gdes[gdi].rpnp[rpi].val = im->gdes[ptr].vf.val;
893 im->gdes[gdi].rpnp[rpi].op = OP_NUMBER;
894 } else { /* normal variables and PREF(variables) */
896 /* add one entry to the array that keeps track of the step sizes of the
897 * data sources going into the CDEF. */
899 rrd_realloc(steparray,
900 (++stepcnt+1)*sizeof(*steparray)))==NULL){
901 rrd_set_error("realloc steparray");
902 rpnstack_free(&rpnstack);
906 steparray[stepcnt-1] = im->gdes[ptr].step;
908 /* adjust start and end of cdef (gdi) so
909 * that it runs from the latest start point
910 * to the earliest endpoint of any of the
911 * rras involved (ptr)
914 if(im->gdes[gdi].start < im->gdes[ptr].start)
915 im->gdes[gdi].start = im->gdes[ptr].start;
917 if(im->gdes[gdi].end == 0 ||
918 im->gdes[gdi].end > im->gdes[ptr].end)
919 im->gdes[gdi].end = im->gdes[ptr].end;
921 /* store pointer to the first element of
922 * the rra providing data for variable,
923 * further save step size and data source
926 im->gdes[gdi].rpnp[rpi].data = im->gdes[ptr].data + im->gdes[ptr].ds;
927 im->gdes[gdi].rpnp[rpi].step = im->gdes[ptr].step;
928 im->gdes[gdi].rpnp[rpi].ds_cnt = im->gdes[ptr].ds_cnt;
930 /* backoff the *.data ptr; this is done so
931 * rpncalc() function doesn't have to treat
932 * the first case differently
934 } /* if ds_cnt != 0 */
935 } /* if OP_VARIABLE */
936 } /* loop through all rpi */
938 /* move the data pointers to the correct period */
939 for(rpi=0;im->gdes[gdi].rpnp[rpi].op != OP_END;rpi++){
940 if(im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
941 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER){
942 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
943 long diff = im->gdes[gdi].start - im->gdes[ptr].start;
946 im->gdes[gdi].rpnp[rpi].data += (diff / im->gdes[ptr].step) * im->gdes[ptr].ds_cnt;
950 if(steparray == NULL){
951 rrd_set_error("rpn expressions without DEF"
952 " or CDEF variables are not supported");
953 rpnstack_free(&rpnstack);
956 steparray[stepcnt]=0;
957 /* Now find the resulting step. All steps in all
958 * used RRAs have to be visited
960 im->gdes[gdi].step = lcd(steparray);
962 if((im->gdes[gdi].data = malloc((
963 (im->gdes[gdi].end-im->gdes[gdi].start)
964 / im->gdes[gdi].step)
965 * sizeof(double)))==NULL){
966 rrd_set_error("malloc im->gdes[gdi].data");
967 rpnstack_free(&rpnstack);
971 /* Step through the new cdef results array and
972 * calculate the values
974 for (now = im->gdes[gdi].start + im->gdes[gdi].step;
975 now<=im->gdes[gdi].end;
976 now += im->gdes[gdi].step)
978 rpnp_t *rpnp = im -> gdes[gdi].rpnp;
980 /* 3rd arg of rpn_calc is for OP_VARIABLE lookups;
981 * in this case we are advancing by timesteps;
982 * we use the fact that time_t is a synonym for long
984 if (rpn_calc(rpnp,&rpnstack,(long) now,
985 im->gdes[gdi].data,++dataidx) == -1) {
986 /* rpn_calc sets the error string */
987 rpnstack_free(&rpnstack);
990 } /* enumerate over time steps within a CDEF */
995 } /* enumerate over CDEFs */
996 rpnstack_free(&rpnstack);
1000 /* massage data so, that we get one value for each x coordinate in the graph */
1002 data_proc( image_desc_t *im ){
1004 double pixstep = (double)(im->end-im->start)
1005 /(double)im->xsize; /* how much time
1006 passes in one pixel */
1008 double minval=DNAN,maxval=DNAN;
1010 unsigned long gr_time;
1012 /* memory for the processed data */
1013 for(i=0;i<im->gdes_c;i++) {
1014 if((im->gdes[i].gf==GF_LINE) ||
1015 (im->gdes[i].gf==GF_AREA) ||
1016 (im->gdes[i].gf==GF_TICK)) {
1017 if((im->gdes[i].p_data = malloc((im->xsize +1)
1018 * sizeof(rrd_value_t)))==NULL){
1019 rrd_set_error("malloc data_proc");
1025 for (i=0;i<im->xsize;i++) { /* for each pixel */
1027 gr_time = im->start+pixstep*i; /* time of the current step */
1030 for (ii=0;ii<im->gdes_c;ii++) {
1032 switch (im->gdes[ii].gf) {
1036 if (!im->gdes[ii].stack)
1038 value = im->gdes[ii].yrule;
1039 if (isnan(value) || (im->gdes[ii].gf == GF_TICK)) {
1040 /* The time of the data doesn't necessarily match
1041 ** the time of the graph. Beware.
1043 vidx = im->gdes[ii].vidx;
1044 if (im->gdes[vidx].gf == GF_VDEF) {
1045 value = im->gdes[vidx].vf.val;
1046 } else if (((long int)gr_time >= (long int)im->gdes[vidx].start) &&
1047 ((long int)gr_time <= (long int)im->gdes[vidx].end) ) {
1048 value = im->gdes[vidx].data[
1049 (unsigned long) floor(
1050 (double)(gr_time - im->gdes[vidx].start)
1051 / im->gdes[vidx].step)
1052 * im->gdes[vidx].ds_cnt
1060 if (! isnan(value)) {
1062 im->gdes[ii].p_data[i] = paintval;
1063 /* GF_TICK: the data values are not
1064 ** relevant for min and max
1066 if (finite(paintval) && im->gdes[ii].gf != GF_TICK ) {
1067 if ((isnan(minval) || paintval < minval ) &&
1068 ! (im->logarithmic && paintval <= 0.0))
1070 if (isnan(maxval) || paintval > maxval)
1074 im->gdes[ii].p_data[i] = DNAN;
1078 rrd_set_error("STACK should already be turned into LINE or AREA here");
1087 /* if min or max have not been asigned a value this is because
1088 there was no data in the graph ... this is not good ...
1089 lets set these to dummy values then ... */
1091 if (im->logarithmic) {
1092 if (isnan(minval)) minval = 0.2;
1093 if (isnan(maxval)) maxval = 5.1;
1096 if (isnan(minval)) minval = 0.0;
1097 if (isnan(maxval)) maxval = 1.0;
1100 /* adjust min and max values */
1101 if (isnan(im->minval)
1102 /* don't adjust low-end with log scale */ /* why not? */
1103 || ((!im->rigid) && im->minval > minval)
1105 if (im->logarithmic)
1106 im->minval = minval * 0.5;
1108 im->minval = minval;
1110 if (isnan(im->maxval)
1111 || (!im->rigid && im->maxval < maxval)
1113 if (im->logarithmic)
1114 im->maxval = maxval * 2.0;
1116 im->maxval = maxval;
1118 /* make sure min is smaller than max */
1119 if (im->minval > im->maxval) {
1120 im->minval = 0.99 * im->maxval;
1123 /* make sure min and max are not equal */
1124 if (im->minval == im->maxval) {
1126 if (! im->logarithmic) {
1129 /* make sure min and max are not both zero */
1130 if (im->maxval == 0.0) {
1139 /* identify the point where the first gridline, label ... gets placed */
1143 time_t start, /* what is the initial time */
1144 enum tmt_en baseint, /* what is the basic interval */
1145 long basestep /* how many if these do we jump a time */
1149 localtime_r(&start, &tm);
1152 tm.tm_sec -= tm.tm_sec % basestep; break;
1155 tm.tm_min -= tm.tm_min % basestep;
1160 tm.tm_hour -= tm.tm_hour % basestep; break;
1162 /* we do NOT look at the basestep for this ... */
1165 tm.tm_hour = 0; break;
1167 /* we do NOT look at the basestep for this ... */
1171 tm.tm_mday -= tm.tm_wday -1; /* -1 because we want the monday */
1172 if (tm.tm_wday==0) tm.tm_mday -= 7; /* we want the *previous* monday */
1179 tm.tm_mon -= tm.tm_mon % basestep; break;
1187 tm.tm_year -= (tm.tm_year+1900) % basestep;
1192 /* identify the point where the next gridline, label ... gets placed */
1195 time_t current, /* what is the initial time */
1196 enum tmt_en baseint, /* what is the basic interval */
1197 long basestep /* how many if these do we jump a time */
1202 localtime_r(¤t, &tm);
1206 tm.tm_sec += basestep; break;
1208 tm.tm_min += basestep; break;
1210 tm.tm_hour += basestep; break;
1212 tm.tm_mday += basestep; break;
1214 tm.tm_mday += 7*basestep; break;
1216 tm.tm_mon += basestep; break;
1218 tm.tm_year += basestep;
1220 madetime = mktime(&tm);
1221 } while (madetime == -1); /* this is necessary to skip impssible times
1222 like the daylight saving time skips */
1228 /* calculate values required for PRINT and GPRINT functions */
1231 print_calc(image_desc_t *im, char ***prdata)
1233 long i,ii,validsteps;
1236 int graphelement = 0;
1239 double magfact = -1;
1243 /* wow initializing tmvdef is quite a task :-) */
1244 time_t now = time(NULL);
1245 localtime_r(&now,&tmvdef);
1246 if (im->imginfo) prlines++;
1247 for(i=0;i<im->gdes_c;i++){
1248 switch(im->gdes[i].gf){
1251 if(((*prdata) = rrd_realloc((*prdata),prlines*sizeof(char *)))==NULL){
1252 rrd_set_error("realloc prdata");
1256 /* PRINT and GPRINT can now print VDEF generated values.
1257 * There's no need to do any calculations on them as these
1258 * calculations were already made.
1260 vidx = im->gdes[i].vidx;
1261 if (im->gdes[vidx].gf==GF_VDEF) { /* simply use vals */
1262 printval = im->gdes[vidx].vf.val;
1263 localtime_r(&im->gdes[vidx].vf.when,&tmvdef);
1264 } else { /* need to calculate max,min,avg etcetera */
1265 max_ii =((im->gdes[vidx].end
1266 - im->gdes[vidx].start)
1267 / im->gdes[vidx].step
1268 * im->gdes[vidx].ds_cnt);
1271 for( ii=im->gdes[vidx].ds;
1273 ii+=im->gdes[vidx].ds_cnt){
1274 if (! finite(im->gdes[vidx].data[ii]))
1276 if (isnan(printval)){
1277 printval = im->gdes[vidx].data[ii];
1282 switch (im->gdes[i].cf){
1285 case CF_DEVSEASONAL:
1289 printval += im->gdes[vidx].data[ii];
1292 printval = min( printval, im->gdes[vidx].data[ii]);
1296 printval = max( printval, im->gdes[vidx].data[ii]);
1299 printval = im->gdes[vidx].data[ii];
1302 if (im->gdes[i].cf==CF_AVERAGE || im->gdes[i].cf > CF_LAST) {
1303 if (validsteps > 1) {
1304 printval = (printval / validsteps);
1307 } /* prepare printval */
1309 if ((percent_s = strstr(im->gdes[i].format,"%S")) != NULL) {
1310 /* Magfact is set to -1 upon entry to print_calc. If it
1311 * is still less than 0, then we need to run auto_scale.
1312 * Otherwise, put the value into the correct units. If
1313 * the value is 0, then do not set the symbol or magnification
1314 * so next the calculation will be performed again. */
1315 if (magfact < 0.0) {
1316 auto_scale(im,&printval,&si_symb,&magfact);
1317 if (printval == 0.0)
1320 printval /= magfact;
1322 *(++percent_s) = 's';
1323 } else if (strstr(im->gdes[i].format,"%s") != NULL) {
1324 auto_scale(im,&printval,&si_symb,&magfact);
1327 if (im->gdes[i].gf == GF_PRINT){
1328 (*prdata)[prlines-2] = malloc((FMT_LEG_LEN+2)*sizeof(char));
1329 (*prdata)[prlines-1] = NULL;
1330 if (im->gdes[i].strftm){
1331 strftime((*prdata)[prlines-2],FMT_LEG_LEN,im->gdes[i].format,&tmvdef);
1333 if (bad_format(im->gdes[i].format)) {
1334 rrd_set_error("bad format for PRINT in '%s'", im->gdes[i].format);
1338 #ifdef HAVE_SNPRINTF
1339 snprintf((*prdata)[prlines-2],FMT_LEG_LEN,im->gdes[i].format,printval,si_symb);
1341 sprintf((*prdata)[prlines-2],im->gdes[i].format,printval,si_symb);
1347 if (im->gdes[i].strftm){
1348 strftime(im->gdes[i].legend,FMT_LEG_LEN,im->gdes[i].format,&tmvdef);
1350 if (bad_format(im->gdes[i].format)) {
1351 rrd_set_error("bad format for GPRINT in '%s'", im->gdes[i].format);
1354 #ifdef HAVE_SNPRINTF
1355 snprintf(im->gdes[i].legend,FMT_LEG_LEN-2,im->gdes[i].format,printval,si_symb);
1357 sprintf(im->gdes[i].legend,im->gdes[i].format,printval,si_symb);
1369 if(isnan(im->gdes[i].yrule)) { /* we must set this here or the legend printer can not decide to print the legend */
1370 im->gdes[i].yrule=im->gdes[im->gdes[i].vidx].vf.val;
1375 if(im->gdes[i].xrule == 0) { /* again ... the legend printer needs it*/
1376 im->gdes[i].xrule = im->gdes[im->gdes[i].vidx].vf.when;
1384 #ifdef WITH_PIECHART
1391 rrd_set_error("STACK should already be turned into LINE or AREA here");
1396 return graphelement;
1400 /* place legends with color spots */
1402 leg_place(image_desc_t *im)
1405 int interleg = im->text_prop[TEXT_PROP_LEGEND].size*2.0;
1406 int border = im->text_prop[TEXT_PROP_LEGEND].size*2.0;
1407 int fill=0, fill_last;
1409 int leg_x = border, leg_y = im->yimg;
1410 int leg_y_prev = im->yimg;
1414 char prt_fctn; /*special printfunctions */
1417 if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
1418 if ((legspace = malloc(im->gdes_c*sizeof(int)))==NULL){
1419 rrd_set_error("malloc for legspace");
1423 for(i=0;i<im->gdes_c;i++){
1426 /* hid legends for rules which are not displayed */
1428 if(!(im->extra_flags & FORCE_RULES_LEGEND)) {
1429 if (im->gdes[i].gf == GF_HRULE &&
1430 (im->gdes[i].yrule < im->minval || im->gdes[i].yrule > im->maxval))
1431 im->gdes[i].legend[0] = '\0';
1433 if (im->gdes[i].gf == GF_VRULE &&
1434 (im->gdes[i].xrule < im->start || im->gdes[i].xrule > im->end))
1435 im->gdes[i].legend[0] = '\0';
1438 leg_cc = strlen(im->gdes[i].legend);
1440 /* is there a controle code ant the end of the legend string ? */
1441 /* and it is not a tab \\t */
1442 if (leg_cc >= 2 && im->gdes[i].legend[leg_cc-2] == '\\' && im->gdes[i].legend[leg_cc-1] != 't') {
1443 prt_fctn = im->gdes[i].legend[leg_cc-1];
1445 im->gdes[i].legend[leg_cc] = '\0';
1449 /* only valid control codes */
1450 if (prt_fctn != 'l' &&
1451 prt_fctn != 'n' && /* a synonym for l */
1459 rrd_set_error("Unknown control code at the end of '%s\\%c'",im->gdes[i].legend,prt_fctn);
1464 /* remove exess space */
1465 if ( prt_fctn == 'n' ){
1469 while (prt_fctn=='g' &&
1471 im->gdes[i].legend[leg_cc-1]==' '){
1473 im->gdes[i].legend[leg_cc]='\0';
1476 legspace[i]=(prt_fctn=='g' ? 0 : interleg);
1479 /* no interleg space if string ends in \g */
1480 fill += legspace[i];
1482 fill += gfx_get_text_width(im->canvas, fill+border,
1483 im->text_prop[TEXT_PROP_LEGEND].font,
1484 im->text_prop[TEXT_PROP_LEGEND].size,
1486 im->gdes[i].legend, 0);
1491 /* who said there was a special tag ... ?*/
1492 if (prt_fctn=='g') {
1495 if (prt_fctn == '\0') {
1496 if (i == im->gdes_c -1 ) prt_fctn ='l';
1498 /* is it time to place the legends ? */
1499 if (fill > im->ximg - 2*border){
1514 if (prt_fctn != '\0'){
1516 if (leg_c >= 2 && prt_fctn == 'j') {
1517 glue = (im->ximg - fill - 2* border) / (leg_c-1);
1521 if (prt_fctn =='c') leg_x = (im->ximg - fill) / 2.0;
1522 if (prt_fctn =='r') leg_x = im->ximg - fill - border;
1524 for(ii=mark;ii<=i;ii++){
1525 if(im->gdes[ii].legend[0]=='\0')
1526 continue; /* skip empty legends */
1527 im->gdes[ii].leg_x = leg_x;
1528 im->gdes[ii].leg_y = leg_y;
1530 gfx_get_text_width(im->canvas, leg_x,
1531 im->text_prop[TEXT_PROP_LEGEND].font,
1532 im->text_prop[TEXT_PROP_LEGEND].size,
1534 im->gdes[ii].legend, 0)
1539 /* only add y space if there was text on the line */
1540 if (leg_x > border || prt_fctn == 's')
1541 leg_y += im->text_prop[TEXT_PROP_LEGEND].size*1.8;
1542 if (prt_fctn == 's')
1543 leg_y -= im->text_prop[TEXT_PROP_LEGEND].size;
1549 im->yimg = leg_y_prev;
1550 /* if we did place some legends we have to add vertical space */
1551 if (leg_y != im->yimg){
1552 im->yimg += im->text_prop[TEXT_PROP_LEGEND].size*1.8;
1559 /* create a grid on the graph. it determines what to do
1560 from the values of xsize, start and end */
1562 /* the xaxis labels are determined from the number of seconds per pixel
1563 in the requested graph */
1568 calc_horizontal_grid(image_desc_t *im)
1574 int decimals, fractionals;
1576 im->ygrid_scale.labfact=2;
1577 range = im->maxval - im->minval;
1578 scaledrange = range / im->magfact;
1580 /* does the scale of this graph make it impossible to put lines
1581 on it? If so, give up. */
1582 if (isnan(scaledrange)) {
1586 /* find grid spaceing */
1588 if(isnan(im->ygridstep)){
1589 if(im->extra_flags & ALTYGRID) {
1590 /* find the value with max number of digits. Get number of digits */
1591 decimals = ceil(log10(max(fabs(im->maxval), fabs(im->minval))*im->viewfactor/im->magfact));
1592 if(decimals <= 0) /* everything is small. make place for zero */
1595 im->ygrid_scale.gridstep = pow((double)10, floor(log10(range*im->viewfactor/im->magfact)))/im->viewfactor*im->magfact;
1597 if(im->ygrid_scale.gridstep == 0) /* range is one -> 0.1 is reasonable scale */
1598 im->ygrid_scale.gridstep = 0.1;
1599 /* should have at least 5 lines but no more then 15 */
1600 if(range/im->ygrid_scale.gridstep < 5)
1601 im->ygrid_scale.gridstep /= 10;
1602 if(range/im->ygrid_scale.gridstep > 15)
1603 im->ygrid_scale.gridstep *= 10;
1604 if(range/im->ygrid_scale.gridstep > 5) {
1605 im->ygrid_scale.labfact = 1;
1606 if(range/im->ygrid_scale.gridstep > 8)
1607 im->ygrid_scale.labfact = 2;
1610 im->ygrid_scale.gridstep /= 5;
1611 im->ygrid_scale.labfact = 5;
1613 fractionals = floor(log10(im->ygrid_scale.gridstep*(double)im->ygrid_scale.labfact*im->viewfactor/im->magfact));
1614 if(fractionals < 0) { /* small amplitude. */
1615 int len = decimals - fractionals + 1;
1616 if (im->unitslength < len+2) im->unitslength = len+2;
1617 sprintf(im->ygrid_scale.labfmt, "%%%d.%df%s", len, -fractionals,(im->symbol != ' ' ? " %c" : ""));
1619 int len = decimals + 1;
1620 if (im->unitslength < len+2) im->unitslength = len+2;
1621 sprintf(im->ygrid_scale.labfmt, "%%%d.0f%s", len, ( im->symbol != ' ' ? " %c" : "" ));
1625 for(i=0;ylab[i].grid > 0;i++){
1626 pixel = im->ysize / (scaledrange / ylab[i].grid);
1633 if (pixel * ylab[gridind].lfac[i] >= 2.5 * im->text_prop[TEXT_PROP_AXIS].size) {
1634 im->ygrid_scale.labfact = ylab[gridind].lfac[i];
1639 im->ygrid_scale.gridstep = ylab[gridind].grid * im->magfact;
1642 im->ygrid_scale.gridstep = im->ygridstep;
1643 im->ygrid_scale.labfact = im->ylabfact;
1648 int draw_horizontal_grid(image_desc_t *im)
1652 char graph_label[100];
1654 double X0=im->xorigin;
1655 double X1=im->xorigin+im->xsize;
1657 int sgrid = (int)( im->minval / im->ygrid_scale.gridstep - 1);
1658 int egrid = (int)( im->maxval / im->ygrid_scale.gridstep + 1);
1660 scaledstep = im->ygrid_scale.gridstep/(double)im->magfact*(double)im->viewfactor;
1661 MaxY = scaledstep*(double)egrid;
1662 for (i = sgrid; i <= egrid; i++){
1663 double Y0=ytr(im,im->ygrid_scale.gridstep*i);
1664 double YN=ytr(im,im->ygrid_scale.gridstep*(i+1));
1665 if ( Y0 >= im->yorigin-im->ysize
1666 && Y0 <= im->yorigin){
1667 /* Make sure at least 2 grid labels are shown, even if it doesn't agree
1668 with the chosen settings. Add a label if required by settings, or if
1669 there is only one label so far and the next grid line is out of bounds. */
1670 if(i % im->ygrid_scale.labfact == 0 || ( nlabels==1 && (YN < im->yorigin-im->ysize || YN > im->yorigin) )){
1671 if (im->symbol == ' ') {
1672 if(im->extra_flags & ALTYGRID) {
1673 sprintf(graph_label,im->ygrid_scale.labfmt,scaledstep*(double)i);
1676 sprintf(graph_label,"%4.1f",scaledstep*(double)i);
1678 sprintf(graph_label,"%4.0f",scaledstep*(double)i);
1682 char sisym = ( i == 0 ? ' ' : im->symbol);
1683 if(im->extra_flags & ALTYGRID) {
1684 sprintf(graph_label,im->ygrid_scale.labfmt,scaledstep*(double)i,sisym);
1687 sprintf(graph_label,"%4.1f %c",scaledstep*(double)i, sisym);
1689 sprintf(graph_label,"%4.0f %c",scaledstep*(double)i, sisym);
1695 gfx_new_text ( im->canvas,
1696 X0-im->text_prop[TEXT_PROP_AXIS].size, Y0,
1697 im->graph_col[GRC_FONT],
1698 im->text_prop[TEXT_PROP_AXIS].font,
1699 im->text_prop[TEXT_PROP_AXIS].size,
1700 im->tabwidth, 0.0, GFX_H_RIGHT, GFX_V_CENTER,
1702 gfx_new_dashed_line ( im->canvas,
1705 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1706 im->grid_dash_on, im->grid_dash_off);
1708 } else if (!(im->extra_flags & NOMINOR)) {
1709 gfx_new_dashed_line ( im->canvas,
1712 GRIDWIDTH, im->graph_col[GRC_GRID],
1713 im->grid_dash_on, im->grid_dash_off);
1721 /* this is frexp for base 10 */
1722 double frexp10(double, double *);
1723 double frexp10(double x, double *e) {
1727 iexp = floor(log(fabs(x)) / log(10));
1728 mnt = x / pow(10.0, iexp);
1731 mnt = x / pow(10.0, iexp);
1737 static int AlmostEqual2sComplement (float A, float B, int maxUlps)
1740 int aInt = *(int*)&A;
1741 int bInt = *(int*)&B;
1743 /* Make sure maxUlps is non-negative and small enough that the
1744 default NAN won't compare as equal to anything. */
1746 /* assert(maxUlps > 0 && maxUlps < 4 * 1024 * 1024); */
1748 /* Make aInt lexicographically ordered as a twos-complement int */
1751 aInt = 0x80000000l - aInt;
1753 /* Make bInt lexicographically ordered as a twos-complement int */
1756 bInt = 0x80000000l - bInt;
1758 intDiff = abs(aInt - bInt);
1760 if (intDiff <= maxUlps)
1766 /* logaritmic horizontal grid */
1768 horizontal_log_grid(image_desc_t *im)
1770 double yloglab[][10] = {
1771 {1.0, 10., 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0},
1772 {1.0, 5.0, 10., 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0},
1773 {1.0, 2.0, 5.0, 7.0, 10., 0.0, 0.0, 0.0, 0.0, 0.0},
1774 {1.0, 2.0, 4.0, 6.0, 8.0, 10., 0.0, 0.0, 0.0, 0.0},
1775 {1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.},
1776 {0,0,0,0,0, 0,0,0,0,0} /* last line */ };
1778 int i, j, val_exp, min_exp;
1779 double nex; /* number of decades in data */
1780 double logscale; /* scale in logarithmic space */
1781 int exfrac = 1; /* decade spacing */
1782 int mid = -1; /* row in yloglab for major grid */
1783 double mspac; /* smallest major grid spacing (pixels) */
1784 int flab; /* first value in yloglab to use */
1785 double value, tmp, pre_value;
1787 char graph_label[100];
1789 nex = log10(im->maxval / im->minval);
1790 logscale = im->ysize / nex;
1792 /* major spacing for data with high dynamic range */
1793 while(logscale * exfrac < 3 * im->text_prop[TEXT_PROP_LEGEND].size) {
1794 if(exfrac == 1) exfrac = 3;
1798 /* major spacing for less dynamic data */
1800 /* search best row in yloglab */
1802 for(i = 0; yloglab[mid][i + 1] < 10.0; i++);
1803 mspac = logscale * log10(10.0 / yloglab[mid][i]);
1804 } while(mspac > 2 * im->text_prop[TEXT_PROP_LEGEND].size && yloglab[mid][0] > 0);
1807 /* find first value in yloglab */
1808 for(flab = 0; yloglab[mid][flab] < 10 && frexp10(im->minval, &tmp) > yloglab[mid][flab] ; flab++);
1809 if(yloglab[mid][flab] == 10.0) {
1814 if(val_exp % exfrac) val_exp += abs(-val_exp % exfrac);
1817 X1=im->xorigin+im->xsize;
1823 value = yloglab[mid][flab] * pow(10.0, val_exp);
1824 if ( AlmostEqual2sComplement(value,pre_value,4) ) break; /* it seems we are not converging */
1828 Y0 = ytr(im, value);
1829 if(Y0 <= im->yorigin - im->ysize) break;
1831 /* major grid line */
1832 gfx_new_dashed_line ( im->canvas,
1835 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1836 im->grid_dash_on, im->grid_dash_off);
1839 if (im->extra_flags & FORCE_UNITS_SI) {
1844 scale = floor(val_exp / 3.0);
1845 if( value >= 1.0 ) pvalue = pow(10.0, val_exp % 3);
1846 else pvalue = pow(10.0, ((val_exp + 1) % 3) + 2);
1847 pvalue *= yloglab[mid][flab];
1849 if ( ((scale+si_symbcenter) < (int)sizeof(si_symbol)) &&
1850 ((scale+si_symbcenter) >= 0) )
1851 symbol = si_symbol[scale+si_symbcenter];
1855 sprintf(graph_label,"%3.0f %c", pvalue, symbol);
1857 sprintf(graph_label,"%3.0e", value);
1858 gfx_new_text ( im->canvas,
1859 X0-im->text_prop[TEXT_PROP_AXIS].size, Y0,
1860 im->graph_col[GRC_FONT],
1861 im->text_prop[TEXT_PROP_AXIS].font,
1862 im->text_prop[TEXT_PROP_AXIS].size,
1863 im->tabwidth,0.0, GFX_H_RIGHT, GFX_V_CENTER,
1867 if(mid < 4 && exfrac == 1) {
1868 /* find first and last minor line behind current major line
1869 * i is the first line and j tha last */
1871 min_exp = val_exp - 1;
1872 for(i = 1; yloglab[mid][i] < 10.0; i++);
1873 i = yloglab[mid][i - 1] + 1;
1878 i = yloglab[mid][flab - 1] + 1;
1879 j = yloglab[mid][flab];
1882 /* draw minor lines below current major line */
1885 value = i * pow(10.0, min_exp);
1886 if(value < im->minval) continue;
1888 Y0 = ytr(im, value);
1889 if(Y0 <= im->yorigin - im->ysize) break;
1892 gfx_new_dashed_line ( im->canvas,
1895 GRIDWIDTH, im->graph_col[GRC_GRID],
1896 im->grid_dash_on, im->grid_dash_off);
1899 else if(exfrac > 1) {
1900 for(i = val_exp - exfrac / 3 * 2; i < val_exp; i += exfrac / 3) {
1901 value = pow(10.0, i);
1902 if(value < im->minval) continue;
1904 Y0 = ytr(im, value);
1905 if(Y0 <= im->yorigin - im->ysize) break;
1908 gfx_new_dashed_line ( im->canvas,
1911 GRIDWIDTH, im->graph_col[GRC_GRID],
1912 im->grid_dash_on, im->grid_dash_off);
1917 if(yloglab[mid][++flab] == 10.0) {
1923 /* draw minor lines after highest major line */
1924 if(mid < 4 && exfrac == 1) {
1925 /* find first and last minor line below current major line
1926 * i is the first line and j tha last */
1928 min_exp = val_exp - 1;
1929 for(i = 1; yloglab[mid][i] < 10.0; i++);
1930 i = yloglab[mid][i - 1] + 1;
1935 i = yloglab[mid][flab - 1] + 1;
1936 j = yloglab[mid][flab];
1939 /* draw minor lines below current major line */
1942 value = i * pow(10.0, min_exp);
1943 if(value < im->minval) continue;
1945 Y0 = ytr(im, value);
1946 if(Y0 <= im->yorigin - im->ysize) break;
1949 gfx_new_dashed_line ( im->canvas,
1952 GRIDWIDTH, im->graph_col[GRC_GRID],
1953 im->grid_dash_on, im->grid_dash_off);
1956 /* fancy minor gridlines */
1957 else if(exfrac > 1) {
1958 for(i = val_exp - exfrac / 3 * 2; i < val_exp; i += exfrac / 3) {
1959 value = pow(10.0, i);
1960 if(value < im->minval) continue;
1962 Y0 = ytr(im, value);
1963 if(Y0 <= im->yorigin - im->ysize) break;
1966 gfx_new_dashed_line ( im->canvas,
1969 GRIDWIDTH, im->graph_col[GRC_GRID],
1970 im->grid_dash_on, im->grid_dash_off);
1982 int xlab_sel; /* which sort of label and grid ? */
1983 time_t ti, tilab, timajor;
1985 char graph_label[100];
1986 double X0,Y0,Y1; /* points for filled graph and more*/
1989 /* the type of time grid is determined by finding
1990 the number of seconds per pixel in the graph */
1993 if(im->xlab_user.minsec == -1){
1994 factor=(im->end - im->start)/im->xsize;
1996 while ( xlab[xlab_sel+1].minsec != -1
1997 && xlab[xlab_sel+1].minsec <= factor) { xlab_sel++; } /* pick the last one */
1998 while ( xlab[xlab_sel-1].minsec == xlab[xlab_sel].minsec
1999 && xlab[xlab_sel].length > (im->end - im->start)) { xlab_sel--; } /* go back to the smallest size */
2000 im->xlab_user.gridtm = xlab[xlab_sel].gridtm;
2001 im->xlab_user.gridst = xlab[xlab_sel].gridst;
2002 im->xlab_user.mgridtm = xlab[xlab_sel].mgridtm;
2003 im->xlab_user.mgridst = xlab[xlab_sel].mgridst;
2004 im->xlab_user.labtm = xlab[xlab_sel].labtm;
2005 im->xlab_user.labst = xlab[xlab_sel].labst;
2006 im->xlab_user.precis = xlab[xlab_sel].precis;
2007 im->xlab_user.stst = xlab[xlab_sel].stst;
2010 /* y coords are the same for every line ... */
2012 Y1 = im->yorigin-im->ysize;
2015 /* paint the minor grid */
2016 if (!(im->extra_flags & NOMINOR))
2018 for(ti = find_first_time(im->start,
2019 im->xlab_user.gridtm,
2020 im->xlab_user.gridst),
2021 timajor = find_first_time(im->start,
2022 im->xlab_user.mgridtm,
2023 im->xlab_user.mgridst);
2025 ti = find_next_time(ti,im->xlab_user.gridtm,im->xlab_user.gridst)
2027 /* are we inside the graph ? */
2028 if (ti < im->start || ti > im->end) continue;
2029 while (timajor < ti) {
2030 timajor = find_next_time(timajor,
2031 im->xlab_user.mgridtm, im->xlab_user.mgridst);
2033 if (ti == timajor) continue; /* skip as falls on major grid line */
2035 gfx_new_dashed_line(im->canvas,X0,Y0+1, X0,Y1-1,GRIDWIDTH,
2036 im->graph_col[GRC_GRID],
2037 im->grid_dash_on, im->grid_dash_off);
2042 /* paint the major grid */
2043 for(ti = find_first_time(im->start,
2044 im->xlab_user.mgridtm,
2045 im->xlab_user.mgridst);
2047 ti = find_next_time(ti,im->xlab_user.mgridtm,im->xlab_user.mgridst)
2049 /* are we inside the graph ? */
2050 if (ti < im->start || ti > im->end) continue;
2052 gfx_new_dashed_line(im->canvas,X0,Y0+3, X0,Y1-2,MGRIDWIDTH,
2053 im->graph_col[GRC_MGRID],
2054 im->grid_dash_on, im->grid_dash_off);
2057 /* paint the labels below the graph */
2058 for(ti = find_first_time(im->start - im->xlab_user.precis/2,
2059 im->xlab_user.labtm,
2060 im->xlab_user.labst);
2061 ti <= im->end - im->xlab_user.precis/2;
2062 ti = find_next_time(ti,im->xlab_user.labtm,im->xlab_user.labst)
2064 tilab= ti + im->xlab_user.precis/2; /* correct time for the label */
2065 /* are we inside the graph ? */
2066 if (tilab < im->start || tilab > im->end) continue;
2069 localtime_r(&tilab, &tm);
2070 strftime(graph_label,99,im->xlab_user.stst, &tm);
2072 # error "your libc has no strftime I guess we'll abort the exercise here."
2074 gfx_new_text ( im->canvas,
2075 xtr(im,tilab), Y0+im->text_prop[TEXT_PROP_AXIS].size*1.4+5,
2076 im->graph_col[GRC_FONT],
2077 im->text_prop[TEXT_PROP_AXIS].font,
2078 im->text_prop[TEXT_PROP_AXIS].size,
2079 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_BOTTOM,
2092 /* draw x and y axis */
2093 /* gfx_new_line ( im->canvas, im->xorigin+im->xsize,im->yorigin,
2094 im->xorigin+im->xsize,im->yorigin-im->ysize,
2095 GRIDWIDTH, im->graph_col[GRC_AXIS]);
2097 gfx_new_line ( im->canvas, im->xorigin,im->yorigin-im->ysize,
2098 im->xorigin+im->xsize,im->yorigin-im->ysize,
2099 GRIDWIDTH, im->graph_col[GRC_AXIS]); */
2101 gfx_new_line ( im->canvas, im->xorigin-4,im->yorigin,
2102 im->xorigin+im->xsize+4,im->yorigin,
2103 MGRIDWIDTH, im->graph_col[GRC_AXIS]);
2105 gfx_new_line ( im->canvas, im->xorigin,im->yorigin+4,
2106 im->xorigin,im->yorigin-im->ysize-4,
2107 MGRIDWIDTH, im->graph_col[GRC_AXIS]);
2110 /* arrow for X and Y axis direction */
2111 gfx_new_area ( im->canvas,
2112 im->xorigin+im->xsize+2, im->yorigin-2,
2113 im->xorigin+im->xsize+2, im->yorigin+3,
2114 im->xorigin+im->xsize+7, im->yorigin+0.5, /* LINEOFFSET */
2115 im->graph_col[GRC_ARROW]);
2117 gfx_new_area ( im->canvas,
2118 im->xorigin-2, im->yorigin-im->ysize-2,
2119 im->xorigin+3, im->yorigin-im->ysize-2,
2120 im->xorigin+0.5, im->yorigin-im->ysize-7, /* LINEOFFSET */
2121 im->graph_col[GRC_ARROW]);
2126 grid_paint(image_desc_t *im)
2130 double X0,Y0; /* points for filled graph and more*/
2133 /* draw 3d border */
2134 node = gfx_new_area (im->canvas, 0,im->yimg,
2136 2,2,im->graph_col[GRC_SHADEA]);
2137 gfx_add_point( node , im->ximg - 2, 2 );
2138 gfx_add_point( node , im->ximg, 0 );
2139 gfx_add_point( node , 0,0 );
2140 /* gfx_add_point( node , 0,im->yimg ); */
2142 node = gfx_new_area (im->canvas, 2,im->yimg-2,
2143 im->ximg-2,im->yimg-2,
2145 im->graph_col[GRC_SHADEB]);
2146 gfx_add_point( node , im->ximg,0);
2147 gfx_add_point( node , im->ximg,im->yimg);
2148 gfx_add_point( node , 0,im->yimg);
2149 /* gfx_add_point( node , 0,im->yimg ); */
2152 if (im->draw_x_grid == 1 )
2155 if (im->draw_y_grid == 1){
2156 if(im->logarithmic){
2157 res = horizontal_log_grid(im);
2159 res = draw_horizontal_grid(im);
2162 /* dont draw horizontal grid if there is no min and max val */
2164 char *nodata = "No Data found";
2165 gfx_new_text(im->canvas,im->ximg/2, (2*im->yorigin-im->ysize) / 2,
2166 im->graph_col[GRC_FONT],
2167 im->text_prop[TEXT_PROP_AXIS].font,
2168 im->text_prop[TEXT_PROP_AXIS].size,
2169 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_CENTER,
2174 /* yaxis unit description */
2175 gfx_new_text( im->canvas,
2176 10, (im->yorigin - im->ysize/2),
2177 im->graph_col[GRC_FONT],
2178 im->text_prop[TEXT_PROP_UNIT].font,
2179 im->text_prop[TEXT_PROP_UNIT].size, im->tabwidth,
2180 RRDGRAPH_YLEGEND_ANGLE,
2181 GFX_H_LEFT, GFX_V_CENTER,
2185 gfx_new_text( im->canvas,
2186 im->ximg/2, im->text_prop[TEXT_PROP_TITLE].size*1.3+4,
2187 im->graph_col[GRC_FONT],
2188 im->text_prop[TEXT_PROP_TITLE].font,
2189 im->text_prop[TEXT_PROP_TITLE].size, im->tabwidth, 0.0,
2190 GFX_H_CENTER, GFX_V_CENTER,
2192 /* rrdtool 'logo' */
2193 gfx_new_text( im->canvas,
2195 ( im->graph_col[GRC_FONT] & 0xffffff00 ) | 0x00000044,
2196 im->text_prop[TEXT_PROP_AXIS].font,
2197 5.5, im->tabwidth, 270,
2198 GFX_H_RIGHT, GFX_V_TOP,
2199 "RRDTOOL / TOBI OETIKER");
2201 /* graph watermark */
2202 if(im->watermark[0] != '\0') {
2203 gfx_new_text( im->canvas,
2204 im->ximg/2, im->yimg-6,
2205 ( im->graph_col[GRC_FONT] & 0xffffff00 ) | 0x00000044,
2206 im->text_prop[TEXT_PROP_AXIS].font,
2207 5.5, im->tabwidth, 0,
2208 GFX_H_CENTER, GFX_V_BOTTOM,
2213 if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
2214 for(i=0;i<im->gdes_c;i++){
2215 if(im->gdes[i].legend[0] =='\0')
2218 /* im->gdes[i].leg_y is the bottom of the legend */
2219 X0 = im->gdes[i].leg_x;
2220 Y0 = im->gdes[i].leg_y;
2221 gfx_new_text ( im->canvas, X0, Y0,
2222 im->graph_col[GRC_FONT],
2223 im->text_prop[TEXT_PROP_LEGEND].font,
2224 im->text_prop[TEXT_PROP_LEGEND].size,
2225 im->tabwidth,0.0, GFX_H_LEFT, GFX_V_BOTTOM,
2226 im->gdes[i].legend );
2227 /* The legend for GRAPH items starts with "M " to have
2228 enough space for the box */
2229 if ( im->gdes[i].gf != GF_PRINT &&
2230 im->gdes[i].gf != GF_GPRINT &&
2231 im->gdes[i].gf != GF_COMMENT) {
2234 boxH = gfx_get_text_width(im->canvas, 0,
2235 im->text_prop[TEXT_PROP_LEGEND].font,
2236 im->text_prop[TEXT_PROP_LEGEND].size,
2237 im->tabwidth,"o", 0) * 1.2;
2240 /* make sure transparent colors show up the same way as in the graph */
2241 node = gfx_new_area(im->canvas,
2245 im->graph_col[GRC_BACK]);
2246 gfx_add_point ( node, X0+boxH, Y0-boxV );
2248 node = gfx_new_area(im->canvas,
2253 gfx_add_point ( node, X0+boxH, Y0-boxV );
2254 node = gfx_new_line(im->canvas,
2257 1.0,im->graph_col[GRC_FRAME]);
2258 gfx_add_point(node,X0+boxH,Y0);
2259 gfx_add_point(node,X0+boxH,Y0-boxV);
2260 gfx_close_path(node);
2267 /*****************************************************
2268 * lazy check make sure we rely need to create this graph
2269 *****************************************************/
2271 int lazy_check(image_desc_t *im){
2274 struct stat imgstat;
2276 if (im->lazy == 0) return 0; /* no lazy option */
2277 if (stat(im->graphfile,&imgstat) != 0)
2278 return 0; /* can't stat */
2279 /* one pixel in the existing graph is more then what we would
2281 if (time(NULL) - imgstat.st_mtime >
2282 (im->end - im->start) / im->xsize)
2284 if ((fd = fopen(im->graphfile,"rb")) == NULL)
2285 return 0; /* the file does not exist */
2286 switch (im->canvas->imgformat) {
2288 size = PngSize(fd,&(im->ximg),&(im->yimg));
2297 #ifdef WITH_PIECHART
2299 pie_part(image_desc_t *im, gfx_color_t color,
2300 double PieCenterX, double PieCenterY, double Radius,
2301 double startangle, double endangle)
2305 double step=M_PI/50; /* Number of iterations for the circle;
2306 ** 10 is definitely too low, more than
2307 ** 50 seems to be overkill
2310 /* Strange but true: we have to work clockwise or else
2311 ** anti aliasing nor transparency don't work.
2313 ** This test is here to make sure we do it right, also
2314 ** this makes the for...next loop more easy to implement.
2315 ** The return will occur if the user enters a negative number
2316 ** (which shouldn't be done according to the specs) or if the
2317 ** programmers do something wrong (which, as we all know, never
2318 ** happens anyway :)
2320 if (endangle<startangle) return;
2322 /* Hidden feature: Radius decreases each full circle */
2324 while (angle>=2*M_PI) {
2329 node=gfx_new_area(im->canvas,
2330 PieCenterX+sin(startangle)*Radius,
2331 PieCenterY-cos(startangle)*Radius,
2334 PieCenterX+sin(endangle)*Radius,
2335 PieCenterY-cos(endangle)*Radius,
2337 for (angle=endangle;angle-startangle>=step;angle-=step) {
2339 PieCenterX+sin(angle)*Radius,
2340 PieCenterY-cos(angle)*Radius );
2347 graph_size_location(image_desc_t *im, int elements
2349 #ifdef WITH_PIECHART
2355 /* The actual size of the image to draw is determined from
2356 ** several sources. The size given on the command line is
2357 ** the graph area but we need more as we have to draw labels
2358 ** and other things outside the graph area
2361 /* +-+-------------------------------------------+
2362 ** |l|.................title.....................|
2363 ** |e+--+-------------------------------+--------+
2366 ** |l| l| main graph area | chart |
2369 ** |r+--+-------------------------------+--------+
2370 ** |e| | x-axis labels | |
2371 ** |v+--+-------------------------------+--------+
2372 ** | |..............legends......................|
2373 ** +-+-------------------------------------------+
2375 ** +---------------------------------------------+
2381 #ifdef WITH_PIECHART
2386 Xlegend =0, Ylegend =0,
2388 Xspacing =15, Yspacing =15,
2392 if (im->extra_flags & ONLY_GRAPH) {
2394 im->ximg = im->xsize;
2395 im->yimg = im->ysize;
2396 im->yorigin = im->ysize;
2401 if (im->ylegend[0] != '\0' ) {
2402 Xvertical = im->text_prop[TEXT_PROP_UNIT].size *2;
2406 if (im->title[0] != '\0') {
2407 /* The title is placed "inbetween" two text lines so it
2408 ** automatically has some vertical spacing. The horizontal
2409 ** spacing is added here, on each side.
2411 /* don't care for the with of the title
2412 Xtitle = gfx_get_text_width(im->canvas, 0,
2413 im->text_prop[TEXT_PROP_TITLE].font,
2414 im->text_prop[TEXT_PROP_TITLE].size,
2416 im->title, 0) + 2*Xspacing; */
2417 Ytitle = im->text_prop[TEXT_PROP_TITLE].size*2.6+10;
2423 if (im->draw_x_grid) {
2424 Yxlabel=im->text_prop[TEXT_PROP_AXIS].size *2.5;
2426 if (im->draw_y_grid) {
2427 Xylabel=gfx_get_text_width(im->canvas, 0,
2428 im->text_prop[TEXT_PROP_AXIS].font,
2429 im->text_prop[TEXT_PROP_AXIS].size,
2431 "0", 0) * im->unitslength;
2435 #ifdef WITH_PIECHART
2437 im->piesize=im->xsize<im->ysize?im->xsize:im->ysize;
2443 /* Now calculate the total size. Insert some spacing where
2444 desired. im->xorigin and im->yorigin need to correspond
2445 with the lower left corner of the main graph area or, if
2446 this one is not set, the imaginary box surrounding the
2449 /* The legend width cannot yet be determined, as a result we
2450 ** have problems adjusting the image to it. For now, we just
2451 ** forget about it at all; the legend will have to fit in the
2452 ** size already allocated.
2454 im->ximg = Xylabel + Xmain + 2 * Xspacing;
2456 #ifdef WITH_PIECHART
2460 if (Xmain) im->ximg += Xspacing;
2461 #ifdef WITH_PIECHART
2462 if (Xpie) im->ximg += Xspacing;
2465 im->xorigin = Xspacing + Xylabel;
2467 /* the length of the title should not influence with width of the graph
2468 if (Xtitle > im->ximg) im->ximg = Xtitle; */
2470 if (Xvertical) { /* unit description */
2471 im->ximg += Xvertical;
2472 im->xorigin += Xvertical;
2476 /* The vertical size is interesting... we need to compare
2477 ** the sum of {Ytitle, Ymain, Yxlabel, Ylegend, Ywatermark} with
2478 ** Yvertical however we need to know {Ytitle+Ymain+Yxlabel}
2479 ** in order to start even thinking about Ylegend or Ywatermark.
2481 ** Do it in three portions: First calculate the inner part,
2482 ** then do the legend, then adjust the total height of the img,
2483 ** adding space for a watermark if one exists;
2486 /* reserve space for main and/or pie */
2488 im->yimg = Ymain + Yxlabel;
2490 #ifdef WITH_PIECHART
2491 if (im->yimg < Ypie) im->yimg = Ypie;
2494 im->yorigin = im->yimg - Yxlabel;
2496 /* reserve space for the title *or* some padding above the graph */
2499 im->yorigin += Ytitle;
2501 im->yimg += 1.5*Yspacing;
2502 im->yorigin += 1.5*Yspacing;
2504 /* reserve space for padding below the graph */
2505 im->yimg += Yspacing;
2507 /* Determine where to place the legends onto the image.
2508 ** Adjust im->yimg to match the space requirements.
2510 if(leg_place(im)==-1)
2513 if (im->watermark[0] != '\0') {
2514 im->yimg += Ywatermark;
2518 if (Xlegend > im->ximg) {
2520 /* reposition Pie */
2524 #ifdef WITH_PIECHART
2525 /* The pie is placed in the upper right hand corner,
2526 ** just below the title (if any) and with sufficient
2530 im->pie_x = im->ximg - Xspacing - Xpie/2;
2531 im->pie_y = im->yorigin-Ymain+Ypie/2;
2533 im->pie_x = im->ximg/2;
2534 im->pie_y = im->yorigin-Ypie/2;
2542 /* from http://www.cygnus-software.com/papers/comparingfloats/comparingfloats.htm */
2543 /* yes we are loosing precision by doing tos with floats instead of doubles
2544 but it seems more stable this way. */
2547 /* draw that picture thing ... */
2549 graph_paint(image_desc_t *im, char ***calcpr)
2552 int lazy = lazy_check(im);
2553 #ifdef WITH_PIECHART
2555 double PieStart=0.0;
2560 double areazero = 0.0;
2561 graph_desc_t *lastgdes = NULL;
2563 /* if we are lazy and there is nothing to PRINT ... quit now */
2564 if (lazy && im->prt_c==0) return 0;
2566 /* pull the data from the rrd files ... */
2568 if(data_fetch(im)==-1)
2571 /* evaluate VDEF and CDEF operations ... */
2572 if(data_calc(im)==-1)
2575 #ifdef WITH_PIECHART
2576 /* check if we need to draw a piechart */
2577 for(i=0;i<im->gdes_c;i++){
2578 if (im->gdes[i].gf == GF_PART) {
2585 /* calculate and PRINT and GPRINT definitions. We have to do it at
2586 * this point because it will affect the length of the legends
2587 * if there are no graph elements we stop here ...
2588 * if we are lazy, try to quit ...
2590 i=print_calc(im,calcpr);
2593 #ifdef WITH_PIECHART
2596 ) || lazy) return 0;
2598 #ifdef WITH_PIECHART
2599 /* If there's only the pie chart to draw, signal this */
2600 if (i==0) piechart=2;
2603 /* get actual drawing data and find min and max values*/
2604 if(data_proc(im)==-1)
2607 if(!im->logarithmic){si_unit(im);} /* identify si magnitude Kilo, Mega Giga ? */
2609 if(!im->rigid && ! im->logarithmic)
2610 expand_range(im); /* make sure the upper and lower limit are
2613 if (!calc_horizontal_grid(im))
2620 /**************************************************************
2621 *** Calculating sizes and locations became a bit confusing ***
2622 *** so I moved this into a separate function. ***
2623 **************************************************************/
2624 if(graph_size_location(im,i
2625 #ifdef WITH_PIECHART
2631 /* the actual graph is created by going through the individual
2632 graph elements and then drawing them */
2634 node=gfx_new_area ( im->canvas,
2638 im->graph_col[GRC_BACK]);
2640 gfx_add_point(node,im->ximg, 0);
2642 #ifdef WITH_PIECHART
2643 if (piechart != 2) {
2645 node=gfx_new_area ( im->canvas,
2646 im->xorigin, im->yorigin,
2647 im->xorigin + im->xsize, im->yorigin,
2648 im->xorigin + im->xsize, im->yorigin-im->ysize,
2649 im->graph_col[GRC_CANVAS]);
2651 gfx_add_point(node,im->xorigin, im->yorigin - im->ysize);
2653 if (im->minval > 0.0)
2654 areazero = im->minval;
2655 if (im->maxval < 0.0)
2656 areazero = im->maxval;
2657 #ifdef WITH_PIECHART
2661 #ifdef WITH_PIECHART
2663 pie_part(im,im->graph_col[GRC_CANVAS],im->pie_x,im->pie_y,im->piesize*0.5,0,2*M_PI);
2667 for(i=0;i<im->gdes_c;i++){
2668 switch(im->gdes[i].gf){
2681 for (ii = 0; ii < im->xsize; ii++)
2683 if (!isnan(im->gdes[i].p_data[ii]) &&
2684 im->gdes[i].p_data[ii] != 0.0)
2686 if (im -> gdes[i].yrule > 0 ) {
2687 gfx_new_line(im->canvas,
2688 im -> xorigin + ii, im->yorigin,
2689 im -> xorigin + ii, im->yorigin - im -> gdes[i].yrule * im -> ysize,
2691 im -> gdes[i].col );
2692 } else if ( im -> gdes[i].yrule < 0 ) {
2693 gfx_new_line(im->canvas,
2694 im -> xorigin + ii, im->yorigin - im -> ysize,
2695 im -> xorigin + ii, im->yorigin - ( 1 - im -> gdes[i].yrule ) * im -> ysize,
2697 im -> gdes[i].col );
2705 /* fix data points at oo and -oo */
2706 for(ii=0;ii<im->xsize;ii++){
2707 if (isinf(im->gdes[i].p_data[ii])){
2708 if (im->gdes[i].p_data[ii] > 0) {
2709 im->gdes[i].p_data[ii] = im->maxval ;
2711 im->gdes[i].p_data[ii] = im->minval ;
2717 /* *******************************************************
2722 -------|--t-1--t--------------------------------
2724 if we know the value at time t was a then
2725 we draw a square from t-1 to t with the value a.
2727 ********************************************************* */
2728 if (im->gdes[i].col != 0x0){
2729 /* GF_LINE and friend */
2730 if(im->gdes[i].gf == GF_LINE ){
2733 for(ii=1;ii<im->xsize;ii++){
2734 if (isnan(im->gdes[i].p_data[ii]) || (im->slopemode==1 && isnan(im->gdes[i].p_data[ii-1]))){
2738 if ( node == NULL ) {
2739 last_y = ytr(im,im->gdes[i].p_data[ii]);
2740 if ( im->slopemode == 0 ){
2741 node = gfx_new_line(im->canvas,
2742 ii-1+im->xorigin,last_y,
2743 ii+im->xorigin,last_y,
2744 im->gdes[i].linewidth,
2747 node = gfx_new_line(im->canvas,
2748 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii-1]),
2749 ii+im->xorigin,last_y,
2750 im->gdes[i].linewidth,
2754 double new_y = ytr(im,im->gdes[i].p_data[ii]);
2755 if ( im->slopemode==0 && ! AlmostEqual2sComplement(new_y,last_y,4)){
2756 gfx_add_point(node,ii-1+im->xorigin,new_y);
2759 gfx_add_point(node,ii+im->xorigin,new_y);
2765 double *foreY=malloc(sizeof(double)*im->xsize*2);
2766 double *foreX=malloc(sizeof(double)*im->xsize*2);
2767 double *backY=malloc(sizeof(double)*im->xsize*2);
2768 double *backX=malloc(sizeof(double)*im->xsize*2);
2770 for(ii=0;ii<=im->xsize;ii++){
2772 if ( idxI > 0 && ( drawem != 0 || ii==im->xsize)){
2775 while (cntI < idxI && AlmostEqual2sComplement(foreY[lastI],foreY[cntI],4) && AlmostEqual2sComplement(foreY[lastI],foreY[cntI+1],4)){cntI++;}
2776 node = gfx_new_area(im->canvas,
2779 foreX[cntI],foreY[cntI], im->gdes[i].col);
2780 while (cntI < idxI) {
2783 while ( cntI < idxI && AlmostEqual2sComplement(foreY[lastI],foreY[cntI],4) && AlmostEqual2sComplement(foreY[lastI],foreY[cntI+1],4)){cntI++;}
2784 gfx_add_point(node,foreX[cntI],foreY[cntI]);
2786 gfx_add_point(node,backX[idxI],backY[idxI]);
2790 while ( idxI > 1 && AlmostEqual2sComplement(backY[lastI], backY[idxI],4) && AlmostEqual2sComplement(backY[lastI],backY[idxI-1],4)){idxI--;}
2791 gfx_add_point(node,backX[idxI],backY[idxI]);
2800 if (ii == im->xsize) break;
2802 /* keep things simple for now, just draw these bars
2803 do not try to build a big and complex area */
2806 if ( im->slopemode == 0 && ii==0){
2809 if ( isnan(im->gdes[i].p_data[ii]) ) {
2813 ytop = ytr(im,im->gdes[i].p_data[ii]);
2814 if ( lastgdes && im->gdes[i].stack ) {
2815 ybase = ytr(im,lastgdes->p_data[ii]);
2817 ybase = ytr(im,areazero);
2819 if ( ybase == ytop ){
2823 /* every area has to be wound clock-wise,
2824 so we have to make sur base remains base */
2826 double extra = ytop;
2830 if ( im->slopemode == 0 ){
2831 backY[++idxI] = ybase-0.2;
2832 backX[idxI] = ii+im->xorigin-1;
2833 foreY[idxI] = ytop+0.2;
2834 foreX[idxI] = ii+im->xorigin-1;
2836 backY[++idxI] = ybase-0.2;
2837 backX[idxI] = ii+im->xorigin;
2838 foreY[idxI] = ytop+0.2;
2839 foreX[idxI] = ii+im->xorigin;
2841 /* close up any remaining area */
2846 } /* else GF_LINE */
2847 } /* if color != 0x0 */
2848 /* make sure we do not run into trouble when stacking on NaN */
2849 for(ii=0;ii<im->xsize;ii++){
2850 if (isnan(im->gdes[i].p_data[ii])) {
2851 if (lastgdes && (im->gdes[i].stack)) {
2852 im->gdes[i].p_data[ii] = lastgdes->p_data[ii];
2854 im->gdes[i].p_data[ii] = areazero;
2858 lastgdes = &(im->gdes[i]);
2860 #ifdef WITH_PIECHART
2862 if(isnan(im->gdes[i].yrule)) /* fetch variable */
2863 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2865 if (finite(im->gdes[i].yrule)) { /* even the fetched var can be NaN */
2866 pie_part(im,im->gdes[i].col,
2867 im->pie_x,im->pie_y,im->piesize*0.4,
2868 M_PI*2.0*PieStart/100.0,
2869 M_PI*2.0*(PieStart+im->gdes[i].yrule)/100.0);
2870 PieStart += im->gdes[i].yrule;
2875 rrd_set_error("STACK should already be turned into LINE or AREA here");
2881 #ifdef WITH_PIECHART
2889 /* grid_paint also does the text */
2890 if( !(im->extra_flags & ONLY_GRAPH) )
2894 if( !(im->extra_flags & ONLY_GRAPH) )
2897 /* the RULES are the last thing to paint ... */
2898 for(i=0;i<im->gdes_c;i++){
2900 switch(im->gdes[i].gf){
2902 if(im->gdes[i].yrule >= im->minval
2903 && im->gdes[i].yrule <= im->maxval)
2904 gfx_new_line(im->canvas,
2905 im->xorigin,ytr(im,im->gdes[i].yrule),
2906 im->xorigin+im->xsize,ytr(im,im->gdes[i].yrule),
2907 1.0,im->gdes[i].col);
2910 if(im->gdes[i].xrule >= im->start
2911 && im->gdes[i].xrule <= im->end)
2912 gfx_new_line(im->canvas,
2913 xtr(im,im->gdes[i].xrule),im->yorigin,
2914 xtr(im,im->gdes[i].xrule),im->yorigin-im->ysize,
2915 1.0,im->gdes[i].col);
2923 if (strcmp(im->graphfile,"-")==0) {
2924 fo = im->graphhandle ? im->graphhandle : stdout;
2925 #if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
2926 /* Change translation mode for stdout to BINARY */
2927 _setmode( _fileno( fo ), O_BINARY );
2930 if ((fo = fopen(im->graphfile,"wb")) == NULL) {
2931 rrd_set_error("Opening '%s' for write: %s",im->graphfile,
2932 rrd_strerror(errno));
2936 gfx_render (im->canvas,im->ximg,im->yimg,0x00000000,fo);
2937 if (strcmp(im->graphfile,"-") != 0)
2943 /*****************************************************
2945 *****************************************************/
2948 gdes_alloc(image_desc_t *im){
2951 if ((im->gdes = (graph_desc_t *) rrd_realloc(im->gdes, (im->gdes_c)
2952 * sizeof(graph_desc_t)))==NULL){
2953 rrd_set_error("realloc graph_descs");
2958 im->gdes[im->gdes_c-1].step=im->step;
2959 im->gdes[im->gdes_c-1].step_orig=im->step;
2960 im->gdes[im->gdes_c-1].stack=0;
2961 im->gdes[im->gdes_c-1].linewidth=0;
2962 im->gdes[im->gdes_c-1].debug=0;
2963 im->gdes[im->gdes_c-1].start=im->start;
2964 im->gdes[im->gdes_c-1].start_orig=im->start;
2965 im->gdes[im->gdes_c-1].end=im->end;
2966 im->gdes[im->gdes_c-1].end_orig=im->end;
2967 im->gdes[im->gdes_c-1].vname[0]='\0';
2968 im->gdes[im->gdes_c-1].data=NULL;
2969 im->gdes[im->gdes_c-1].ds_namv=NULL;
2970 im->gdes[im->gdes_c-1].data_first=0;
2971 im->gdes[im->gdes_c-1].p_data=NULL;
2972 im->gdes[im->gdes_c-1].rpnp=NULL;
2973 im->gdes[im->gdes_c-1].shift=0;
2974 im->gdes[im->gdes_c-1].col = 0x0;
2975 im->gdes[im->gdes_c-1].legend[0]='\0';
2976 im->gdes[im->gdes_c-1].format[0]='\0';
2977 im->gdes[im->gdes_c-1].strftm=0;
2978 im->gdes[im->gdes_c-1].rrd[0]='\0';
2979 im->gdes[im->gdes_c-1].ds=-1;
2980 im->gdes[im->gdes_c-1].cf_reduce=CF_AVERAGE;
2981 im->gdes[im->gdes_c-1].cf=CF_AVERAGE;
2982 im->gdes[im->gdes_c-1].p_data=NULL;
2983 im->gdes[im->gdes_c-1].yrule=DNAN;
2984 im->gdes[im->gdes_c-1].xrule=0;
2988 /* copies input untill the first unescaped colon is found
2989 or until input ends. backslashes have to be escaped as well */
2991 scan_for_col(const char *const input, int len, char *const output)
2996 input[inp] != ':' &&
2999 if (input[inp] == '\\' &&
3000 input[inp+1] != '\0' &&
3001 (input[inp+1] == '\\' ||
3002 input[inp+1] == ':')){
3003 output[outp++] = input[++inp];
3006 output[outp++] = input[inp];
3009 output[outp] = '\0';
3012 /* Some surgery done on this function, it became ridiculously big.
3014 ** - initializing now in rrd_graph_init()
3015 ** - options parsing now in rrd_graph_options()
3016 ** - script parsing now in rrd_graph_script()
3019 rrd_graph(int argc, char **argv, char ***prdata, int *xsize, int *ysize, FILE *stream, double *ymin, double *ymax)
3022 rrd_graph_init(&im);
3023 im.graphhandle = stream;
3025 rrd_graph_options(argc,argv,&im);
3026 if (rrd_test_error()) {
3031 if (strlen(argv[optind])>=MAXPATH) {
3032 rrd_set_error("filename (including path) too long");
3036 strncpy(im.graphfile,argv[optind],MAXPATH-1);
3037 im.graphfile[MAXPATH-1]='\0';
3039 rrd_graph_script(argc,argv,&im,1);
3040 if (rrd_test_error()) {
3045 /* Everything is now read and the actual work can start */
3048 if (graph_paint(&im,prdata)==-1){
3053 /* The image is generated and needs to be output.
3054 ** Also, if needed, print a line with information about the image.
3064 /* maybe prdata is not allocated yet ... lets do it now */
3065 if ((*prdata = calloc(2,sizeof(char *)))==NULL) {
3066 rrd_set_error("malloc imginfo");
3070 if(((*prdata)[0] = malloc((strlen(im.imginfo)+200+strlen(im.graphfile))*sizeof(char)))
3072 rrd_set_error("malloc imginfo");
3075 filename=im.graphfile+strlen(im.graphfile);
3076 while(filename > im.graphfile) {
3077 if (*(filename-1)=='/' || *(filename-1)=='\\' ) break;
3081 sprintf((*prdata)[0],im.imginfo,filename,(long)(im.canvas->zoom*im.ximg),(long)(im.canvas->zoom*im.yimg));
3088 rrd_graph_init(image_desc_t *im)
3095 #ifdef HAVE_SETLOCALE
3096 setlocale(LC_TIME,"");
3097 #ifdef HAVE_MBSTOWCS
3098 setlocale(LC_CTYPE,"");
3104 im->xlab_user.minsec = -1;
3110 im->ylegend[0] = '\0';
3111 im->title[0] = '\0';
3112 im->watermark[0] = '\0';
3115 im->unitsexponent= 9999;
3118 im->viewfactor = 1.0;
3125 im->logarithmic = 0;
3126 im->ygridstep = DNAN;
3127 im->draw_x_grid = 1;
3128 im->draw_y_grid = 1;
3133 im->canvas = gfx_new_canvas();
3134 im->grid_dash_on = 1;
3135 im->grid_dash_off = 1;
3136 im->tabwidth = 40.0;
3138 for(i=0;i<DIM(graph_col);i++)
3139 im->graph_col[i]=graph_col[i];
3141 #if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
3144 char rrd_win_default_font[1000];
3145 windir = getenv("windir");
3146 /* %windir% is something like D:\windows or C:\winnt */
3147 if (windir != NULL) {
3148 strncpy(rrd_win_default_font,windir,500);
3149 rrd_win_default_font[500] = '\0';
3150 strcat(rrd_win_default_font,"\\fonts\\");
3151 strcat(rrd_win_default_font,RRD_DEFAULT_FONT);
3152 for(i=0;i<DIM(text_prop);i++){
3153 strncpy(text_prop[i].font,rrd_win_default_font,sizeof(text_prop[i].font)-1);
3154 text_prop[i].font[sizeof(text_prop[i].font)-1] = '\0';
3161 deffont = getenv("RRD_DEFAULT_FONT");
3162 if (deffont != NULL) {
3163 for(i=0;i<DIM(text_prop);i++){
3164 strncpy(text_prop[i].font,deffont,sizeof(text_prop[i].font)-1);
3165 text_prop[i].font[sizeof(text_prop[i].font)-1] = '\0';
3169 for(i=0;i<DIM(text_prop);i++){
3170 im->text_prop[i].size = text_prop[i].size;
3171 strcpy(im->text_prop[i].font,text_prop[i].font);
3176 rrd_graph_options(int argc, char *argv[],image_desc_t *im)
3179 char *parsetime_error = NULL;
3180 char scan_gtm[12],scan_mtm[12],scan_ltm[12],col_nam[12];
3181 time_t start_tmp=0,end_tmp=0;
3183 struct rrd_time_value start_tv, end_tv;
3185 optind = 0; opterr = 0; /* initialize getopt */
3187 parsetime("end-24h", &start_tv);
3188 parsetime("now", &end_tv);
3190 /* defines for long options without a short equivalent. should be bytes,
3191 and may not collide with (the ASCII value of) short options */
3192 #define LONGOPT_UNITS_SI 255
3195 static struct option long_options[] =
3197 {"start", required_argument, 0, 's'},
3198 {"end", required_argument, 0, 'e'},
3199 {"x-grid", required_argument, 0, 'x'},
3200 {"y-grid", required_argument, 0, 'y'},
3201 {"vertical-label",required_argument,0,'v'},
3202 {"width", required_argument, 0, 'w'},
3203 {"height", required_argument, 0, 'h'},
3204 {"interlaced", no_argument, 0, 'i'},
3205 {"upper-limit",required_argument, 0, 'u'},
3206 {"lower-limit",required_argument, 0, 'l'},
3207 {"rigid", no_argument, 0, 'r'},
3208 {"base", required_argument, 0, 'b'},
3209 {"logarithmic",no_argument, 0, 'o'},
3210 {"color", required_argument, 0, 'c'},
3211 {"font", required_argument, 0, 'n'},
3212 {"title", required_argument, 0, 't'},
3213 {"imginfo", required_argument, 0, 'f'},
3214 {"imgformat", required_argument, 0, 'a'},
3215 {"lazy", no_argument, 0, 'z'},
3216 {"zoom", required_argument, 0, 'm'},
3217 {"no-legend", no_argument, 0, 'g'},
3218 {"force-rules-legend",no_argument,0, 'F'},
3219 {"only-graph", no_argument, 0, 'j'},
3220 {"alt-y-grid", no_argument, 0, 'Y'},
3221 {"no-minor", no_argument, 0, 'I'},
3222 {"slope-mode", no_argument, 0, 'E'},
3223 {"alt-autoscale", no_argument, 0, 'A'},
3224 {"alt-autoscale-max", no_argument, 0, 'M'},
3225 {"no-gridfit", no_argument, 0, 'N'},
3226 {"units-exponent",required_argument, 0, 'X'},
3227 {"units-length",required_argument, 0, 'L'},
3228 {"units", required_argument, 0, LONGOPT_UNITS_SI },
3229 {"step", required_argument, 0, 'S'},
3230 {"tabwidth", required_argument, 0, 'T'},
3231 {"font-render-mode", required_argument, 0, 'R'},
3232 {"font-smoothing-threshold", required_argument, 0, 'B'},
3233 {"watermark", required_argument, 0, 'W'},
3234 {"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 */
3236 int option_index = 0;
3238 int col_start,col_end;
3240 opt = getopt_long(argc, argv,
3241 "s:e:x:y:v:w:h:iu:l:rb:oc:n:m:t:f:a:I:zgjFYAMEX:L:S:T:NR:B:W:",
3242 long_options, &option_index);
3249 im->extra_flags |= NOMINOR;
3252 im->extra_flags |= ALTYGRID;
3255 im->extra_flags |= ALTAUTOSCALE;
3258 im->extra_flags |= ALTAUTOSCALE_MAX;
3261 im->extra_flags |= ONLY_GRAPH;
3264 im->extra_flags |= NOLEGEND;
3267 im->extra_flags |= FORCE_RULES_LEGEND;
3269 case LONGOPT_UNITS_SI:
3270 if(im->extra_flags & FORCE_UNITS) {
3271 rrd_set_error("--units can only be used once!");
3274 if(strcmp(optarg,"si")==0)
3275 im->extra_flags |= FORCE_UNITS_SI;
3277 rrd_set_error("invalid argument for --units: %s", optarg );
3282 im->unitsexponent = atoi(optarg);
3285 im->unitslength = atoi(optarg);
3288 im->tabwidth = atof(optarg);
3291 im->step = atoi(optarg);
3297 if ((parsetime_error = parsetime(optarg, &start_tv))) {
3298 rrd_set_error( "start time: %s", parsetime_error );
3303 if ((parsetime_error = parsetime(optarg, &end_tv))) {
3304 rrd_set_error( "end time: %s", parsetime_error );
3309 if(strcmp(optarg,"none") == 0){
3315 "%10[A-Z]:%ld:%10[A-Z]:%ld:%10[A-Z]:%ld:%ld:%n",
3317 &im->xlab_user.gridst,
3319 &im->xlab_user.mgridst,
3321 &im->xlab_user.labst,
3322 &im->xlab_user.precis,
3323 &stroff) == 7 && stroff != 0){
3324 strncpy(im->xlab_form, optarg+stroff, sizeof(im->xlab_form) - 1);
3325 im->xlab_form[sizeof(im->xlab_form)-1] = '\0';
3326 if((int)(im->xlab_user.gridtm = tmt_conv(scan_gtm)) == -1){
3327 rrd_set_error("unknown keyword %s",scan_gtm);
3329 } else if ((int)(im->xlab_user.mgridtm = tmt_conv(scan_mtm)) == -1){
3330 rrd_set_error("unknown keyword %s",scan_mtm);
3332 } else if ((int)(im->xlab_user.labtm = tmt_conv(scan_ltm)) == -1){
3333 rrd_set_error("unknown keyword %s",scan_ltm);
3336 im->xlab_user.minsec = 1;
3337 im->xlab_user.stst = im->xlab_form;
3339 rrd_set_error("invalid x-grid format");
3345 if(strcmp(optarg,"none") == 0){
3353 &im->ylabfact) == 2) {
3354 if(im->ygridstep<=0){
3355 rrd_set_error("grid step must be > 0");
3357 } else if (im->ylabfact < 1){
3358 rrd_set_error("label factor must be > 0");
3362 rrd_set_error("invalid y-grid format");
3367 strncpy(im->ylegend,optarg,150);
3368 im->ylegend[150]='\0';
3371 im->maxval = atof(optarg);
3374 im->minval = atof(optarg);
3377 im->base = atol(optarg);
3378 if(im->base != 1024 && im->base != 1000 ){
3379 rrd_set_error("the only sensible value for base apart from 1000 is 1024");
3384 long_tmp = atol(optarg);
3385 if (long_tmp < 10) {
3386 rrd_set_error("width below 10 pixels");
3389 im->xsize = long_tmp;
3392 long_tmp = atol(optarg);
3393 if (long_tmp < 10) {
3394 rrd_set_error("height below 10 pixels");
3397 im->ysize = long_tmp;
3400 im->canvas->interlaced = 1;
3406 im->imginfo = optarg;
3409 if((int)(im->canvas->imgformat = if_conv(optarg)) == -1) {
3410 rrd_set_error("unsupported graphics format '%s'",optarg);
3422 im->logarithmic = 1;
3426 "%10[A-Z]#%n%8lx%n",
3427 col_nam,&col_start,&color,&col_end) == 2){
3429 int col_len = col_end - col_start;
3433 ((color & 0xF00) * 0x110000) |
3434 ((color & 0x0F0) * 0x011000) |
3435 ((color & 0x00F) * 0x001100) |
3441 ((color & 0xF000) * 0x11000) |
3442 ((color & 0x0F00) * 0x01100) |
3443 ((color & 0x00F0) * 0x00110) |
3444 ((color & 0x000F) * 0x00011)
3448 color = (color << 8) + 0xff /* shift left by 8 */;
3453 rrd_set_error("the color format is #RRGGBB[AA]");
3456 if((ci=grc_conv(col_nam)) != -1){
3457 im->graph_col[ci]=color;
3459 rrd_set_error("invalid color name '%s'",col_nam);
3463 rrd_set_error("invalid color def format");
3470 char font[1024] = "";
3473 "%10[A-Z]:%lf:%1000s",
3474 prop,&size,font) >= 2){
3476 if((sindex=text_prop_conv(prop)) != -1){
3477 for (propidx=sindex;propidx<TEXT_PROP_LAST;propidx++){
3479 im->text_prop[propidx].size=size;
3481 if (strlen(font) > 0){
3482 strcpy(im->text_prop[propidx].font,font);
3484 if (propidx==sindex && sindex != 0) break;
3487 rrd_set_error("invalid fonttag '%s'",prop);
3491 rrd_set_error("invalid text property format");
3497 im->canvas->zoom = atof(optarg);
3498 if (im->canvas->zoom <= 0.0) {
3499 rrd_set_error("zoom factor must be > 0");
3504 strncpy(im->title,optarg,150);
3505 im->title[150]='\0';
3509 if ( strcmp( optarg, "normal" ) == 0 )
3510 im->canvas->aa_type = AA_NORMAL;
3511 else if ( strcmp( optarg, "light" ) == 0 )
3512 im->canvas->aa_type = AA_LIGHT;
3513 else if ( strcmp( optarg, "mono" ) == 0 )
3514 im->canvas->aa_type = AA_NONE;
3517 rrd_set_error("unknown font-render-mode '%s'", optarg );
3523 im->canvas->font_aa_threshold = atof(optarg);
3527 strncpy(im->watermark,optarg,100);
3528 im->watermark[99]='\0';
3533 rrd_set_error("unknown option '%c'", optopt);
3535 rrd_set_error("unknown option '%s'",argv[optind-1]);
3540 if (optind >= argc) {
3541 rrd_set_error("missing filename");
3545 if (im->logarithmic == 1 && im->minval <= 0){
3546 rrd_set_error("for a logarithmic yaxis you must specify a lower-limit > 0");
3550 if (proc_start_end(&start_tv,&end_tv,&start_tmp,&end_tmp) == -1){
3551 /* error string is set in parsetime.c */
3555 if (start_tmp < 3600*24*365*10){
3556 rrd_set_error("the first entry to fetch should be after 1980 (%ld)",start_tmp);
3560 if (end_tmp < start_tmp) {
3561 rrd_set_error("start (%ld) should be less than end (%ld)",
3562 start_tmp, end_tmp);
3566 im->start = start_tmp;
3568 im->step = max((long)im->step, (im->end-im->start)/im->xsize);
3572 rrd_graph_check_vname(image_desc_t *im, char *varname, char *err)
3574 if ((im->gdes[im->gdes_c-1].vidx=find_var(im,varname))==-1) {
3575 rrd_set_error("Unknown variable '%s' in %s",varname,err);
3581 rrd_graph_color(image_desc_t *im, char *var, char *err, int optional)
3584 graph_desc_t *gdp=&im->gdes[im->gdes_c-1];
3586 color=strstr(var,"#");
3589 rrd_set_error("Found no color in %s",err);
3598 rest=strstr(color,":");
3606 sscanf(color,"#%6lx%n",&col,&n);
3607 col = (col << 8) + 0xff /* shift left by 8 */;
3608 if (n!=7) rrd_set_error("Color problem in %s",err);
3611 sscanf(color,"#%8lx%n",&col,&n);
3614 rrd_set_error("Color problem in %s",err);
3616 if (rrd_test_error()) return 0;
3623 int bad_format(char *fmt) {
3627 while (*ptr != '\0')
3628 if (*ptr++ == '%') {
3630 /* line cannot end with percent char */
3631 if (*ptr == '\0') return 1;
3633 /* '%s', '%S' and '%%' are allowed */
3634 if (*ptr == 's' || *ptr == 'S' || *ptr == '%') ptr++;
3636 /* %c is allowed (but use only with vdef!) */
3637 else if (*ptr == 'c') {
3642 /* or else '% 6.2lf' and such are allowed */
3644 /* optional padding character */
3645 if (*ptr == ' ' || *ptr == '+' || *ptr == '-') ptr++;
3647 /* This should take care of 'm.n' with all three optional */
3648 while (*ptr >= '0' && *ptr <= '9') ptr++;
3649 if (*ptr == '.') ptr++;
3650 while (*ptr >= '0' && *ptr <= '9') ptr++;
3652 /* Either 'le', 'lf' or 'lg' must follow here */
3653 if (*ptr++ != 'l') return 1;
3654 if (*ptr == 'e' || *ptr == 'f' || *ptr == 'g') ptr++;
3665 vdef_parse(gdes,str)
3666 struct graph_desc_t *gdes;
3667 const char *const str;
3669 /* A VDEF currently is either "func" or "param,func"
3670 * so the parsing is rather simple. Change if needed.
3677 sscanf(str,"%le,%29[A-Z]%n",¶m,func,&n);
3678 if (n== (int)strlen(str)) { /* matched */
3682 sscanf(str,"%29[A-Z]%n",func,&n);
3683 if (n== (int)strlen(str)) { /* matched */
3686 rrd_set_error("Unknown function string '%s' in VDEF '%s'"
3693 if (!strcmp("PERCENT",func)) gdes->vf.op = VDEF_PERCENT;
3694 else if (!strcmp("MAXIMUM",func)) gdes->vf.op = VDEF_MAXIMUM;
3695 else if (!strcmp("AVERAGE",func)) gdes->vf.op = VDEF_AVERAGE;
3696 else if (!strcmp("MINIMUM",func)) gdes->vf.op = VDEF_MINIMUM;
3697 else if (!strcmp("TOTAL", func)) gdes->vf.op = VDEF_TOTAL;
3698 else if (!strcmp("FIRST", func)) gdes->vf.op = VDEF_FIRST;
3699 else if (!strcmp("LAST", func)) gdes->vf.op = VDEF_LAST;
3700 else if (!strcmp("LSLSLOPE", func)) gdes->vf.op = VDEF_LSLSLOPE;
3701 else if (!strcmp("LSLINT", func)) gdes->vf.op = VDEF_LSLINT;
3702 else if (!strcmp("LSLCORREL",func)) gdes->vf.op = VDEF_LSLCORREL;
3704 rrd_set_error("Unknown function '%s' in VDEF '%s'\n"
3711 switch (gdes->vf.op) {
3713 if (isnan(param)) { /* no parameter given */
3714 rrd_set_error("Function '%s' needs parameter in VDEF '%s'\n"
3720 if (param>=0.0 && param<=100.0) {
3721 gdes->vf.param = param;
3722 gdes->vf.val = DNAN; /* undefined */
3723 gdes->vf.when = 0; /* undefined */
3725 rrd_set_error("Parameter '%f' out of range in VDEF '%s'\n"
3740 case VDEF_LSLCORREL:
3742 gdes->vf.param = DNAN;
3743 gdes->vf.val = DNAN;
3746 rrd_set_error("Function '%s' needs no parameter in VDEF '%s'\n"
3763 graph_desc_t *src,*dst;
3767 dst = &im->gdes[gdi];
3768 src = &im->gdes[dst->vidx];
3769 data = src->data + src->ds;
3770 steps = (src->end - src->start) / src->step;
3773 printf("DEBUG: start == %lu, end == %lu, %lu steps\n"
3780 switch (dst->vf.op) {
3781 case VDEF_PERCENT: {
3782 rrd_value_t * array;
3786 if ((array = malloc(steps*sizeof(double)))==NULL) {
3787 rrd_set_error("malloc VDEV_PERCENT");
3790 for (step=0;step < steps; step++) {
3791 array[step]=data[step*src->ds_cnt];
3793 qsort(array,step,sizeof(double),vdef_percent_compar);
3795 field = (steps-1)*dst->vf.param/100;
3796 dst->vf.val = array[field];
3797 dst->vf.when = 0; /* no time component */
3800 for(step=0;step<steps;step++)
3801 printf("DEBUG: %3li:%10.2f %c\n",step,array[step],step==field?'*':' ');
3807 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3808 if (step == steps) {
3812 dst->vf.val = data[step*src->ds_cnt];
3813 dst->vf.when = src->start + (step+1)*src->step;
3815 while (step != steps) {
3816 if (finite(data[step*src->ds_cnt])) {
3817 if (data[step*src->ds_cnt] > dst->vf.val) {
3818 dst->vf.val = data[step*src->ds_cnt];
3819 dst->vf.when = src->start + (step+1)*src->step;
3826 case VDEF_AVERAGE: {
3829 for (step=0;step<steps;step++) {
3830 if (finite(data[step*src->ds_cnt])) {
3831 sum += data[step*src->ds_cnt];
3836 if (dst->vf.op == VDEF_TOTAL) {
3837 dst->vf.val = sum*src->step;
3838 dst->vf.when = 0; /* no time component */
3840 dst->vf.val = sum/cnt;
3841 dst->vf.when = 0; /* no time component */
3851 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3852 if (step == steps) {
3856 dst->vf.val = data[step*src->ds_cnt];
3857 dst->vf.when = src->start + (step+1)*src->step;
3859 while (step != steps) {
3860 if (finite(data[step*src->ds_cnt])) {
3861 if (data[step*src->ds_cnt] < dst->vf.val) {
3862 dst->vf.val = data[step*src->ds_cnt];
3863 dst->vf.when = src->start + (step+1)*src->step;
3870 /* The time value returned here is one step before the
3871 * actual time value. This is the start of the first
3875 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3876 if (step == steps) { /* all entries were NaN */
3880 dst->vf.val = data[step*src->ds_cnt];
3881 dst->vf.when = src->start + step*src->step;
3885 /* The time value returned here is the
3886 * actual time value. This is the end of the last
3890 while (step >= 0 && isnan(data[step*src->ds_cnt])) step--;
3891 if (step < 0) { /* all entries were NaN */
3895 dst->vf.val = data[step*src->ds_cnt];
3896 dst->vf.when = src->start + (step+1)*src->step;
3901 case VDEF_LSLCORREL:{
3902 /* Bestfit line by linear least squares method */
3905 double SUMx, SUMy, SUMxy, SUMxx, SUMyy, slope, y_intercept, correl ;
3906 SUMx = 0; SUMy = 0; SUMxy = 0; SUMxx = 0; SUMyy = 0;
3908 for (step=0;step<steps;step++) {
3909 if (finite(data[step*src->ds_cnt])) {
3912 SUMxx += step * step;
3913 SUMxy += step * data[step*src->ds_cnt];
3914 SUMy += data[step*src->ds_cnt];
3915 SUMyy += data[step*src->ds_cnt]*data[step*src->ds_cnt];
3919 slope = ( SUMx*SUMy - cnt*SUMxy ) / ( SUMx*SUMx - cnt*SUMxx );
3920 y_intercept = ( SUMy - slope*SUMx ) / cnt;
3921 correl = (SUMxy - (SUMx*SUMy)/cnt) / sqrt((SUMxx - (SUMx*SUMx)/cnt)*(SUMyy - (SUMy*SUMy)/cnt));
3924 if (dst->vf.op == VDEF_LSLSLOPE) {
3925 dst->vf.val = slope;
3927 } else if (dst->vf.op == VDEF_LSLINT) {
3928 dst->vf.val = y_intercept;
3930 } else if (dst->vf.op == VDEF_LSLCORREL) {
3931 dst->vf.val = correl;
3945 /* NaN < -INF < finite_values < INF */
3947 vdef_percent_compar(a,b)
3950 /* Equality is not returned; this doesn't hurt except
3951 * (maybe) for a little performance.
3954 /* First catch NaN values. They are smallest */
3955 if (isnan( *(double *)a )) return -1;
3956 if (isnan( *(double *)b )) return 1;
3958 /* NaN doesn't reach this part so INF and -INF are extremes.
3959 * The sign from isinf() is compatible with the sign we return
3961 if (isinf( *(double *)a )) return isinf( *(double *)a );
3962 if (isinf( *(double *)b )) return isinf( *(double *)b );
3964 /* If we reach this, both values must be finite */
3965 if ( *(double *)a < *(double *)b ) return -1; else return 1;