1 /****************************************************************************
2 * RRDtool 1.2.15 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' &&
1457 rrd_set_error("Uknown control code at the end of '%s\\%c'",im->gdes[i].legend,prt_fctn);
1461 /* remove exess space */
1462 while (prt_fctn=='g' &&
1464 im->gdes[i].legend[leg_cc-1]==' '){
1466 im->gdes[i].legend[leg_cc]='\0';
1469 legspace[i]=(prt_fctn=='g' ? 0 : interleg);
1472 /* no interleg space if string ends in \g */
1473 fill += legspace[i];
1475 fill += gfx_get_text_width(im->canvas, fill+border,
1476 im->text_prop[TEXT_PROP_LEGEND].font,
1477 im->text_prop[TEXT_PROP_LEGEND].size,
1479 im->gdes[i].legend, 0);
1484 /* who said there was a special tag ... ?*/
1485 if (prt_fctn=='g') {
1488 if (prt_fctn == '\0') {
1489 if (i == im->gdes_c -1 ) prt_fctn ='l';
1491 /* is it time to place the legends ? */
1492 if (fill > im->ximg - 2*border){
1507 if (prt_fctn != '\0'){
1509 if (leg_c >= 2 && prt_fctn == 'j') {
1510 glue = (im->ximg - fill - 2* border) / (leg_c-1);
1514 if (prt_fctn =='c') leg_x = (im->ximg - fill) / 2.0;
1515 if (prt_fctn =='r') leg_x = im->ximg - fill - border;
1517 for(ii=mark;ii<=i;ii++){
1518 if(im->gdes[ii].legend[0]=='\0')
1519 continue; /* skip empty legends */
1520 im->gdes[ii].leg_x = leg_x;
1521 im->gdes[ii].leg_y = leg_y;
1523 gfx_get_text_width(im->canvas, leg_x,
1524 im->text_prop[TEXT_PROP_LEGEND].font,
1525 im->text_prop[TEXT_PROP_LEGEND].size,
1527 im->gdes[ii].legend, 0)
1532 /* only add y space if there was text on the line */
1533 if (leg_x > border || prt_fctn == 's')
1534 leg_y += im->text_prop[TEXT_PROP_LEGEND].size*1.8;
1535 if (prt_fctn == 's')
1536 leg_y -= im->text_prop[TEXT_PROP_LEGEND].size;
1542 im->yimg = leg_y_prev;
1543 /* if we did place some legends we have to add vertical space */
1544 if (leg_y != im->yimg){
1545 im->yimg += im->text_prop[TEXT_PROP_LEGEND].size*1.8;
1552 /* create a grid on the graph. it determines what to do
1553 from the values of xsize, start and end */
1555 /* the xaxis labels are determined from the number of seconds per pixel
1556 in the requested graph */
1561 calc_horizontal_grid(image_desc_t *im)
1567 int decimals, fractionals;
1569 im->ygrid_scale.labfact=2;
1570 range = im->maxval - im->minval;
1571 scaledrange = range / im->magfact;
1573 /* does the scale of this graph make it impossible to put lines
1574 on it? If so, give up. */
1575 if (isnan(scaledrange)) {
1579 /* find grid spaceing */
1581 if(isnan(im->ygridstep)){
1582 if(im->extra_flags & ALTYGRID) {
1583 /* find the value with max number of digits. Get number of digits */
1584 decimals = ceil(log10(max(fabs(im->maxval), fabs(im->minval))*im->viewfactor/im->magfact));
1585 if(decimals <= 0) /* everything is small. make place for zero */
1588 im->ygrid_scale.gridstep = pow((double)10, floor(log10(range*im->viewfactor/im->magfact)))/im->viewfactor*im->magfact;
1590 if(im->ygrid_scale.gridstep == 0) /* range is one -> 0.1 is reasonable scale */
1591 im->ygrid_scale.gridstep = 0.1;
1592 /* should have at least 5 lines but no more then 15 */
1593 if(range/im->ygrid_scale.gridstep < 5)
1594 im->ygrid_scale.gridstep /= 10;
1595 if(range/im->ygrid_scale.gridstep > 15)
1596 im->ygrid_scale.gridstep *= 10;
1597 if(range/im->ygrid_scale.gridstep > 5) {
1598 im->ygrid_scale.labfact = 1;
1599 if(range/im->ygrid_scale.gridstep > 8)
1600 im->ygrid_scale.labfact = 2;
1603 im->ygrid_scale.gridstep /= 5;
1604 im->ygrid_scale.labfact = 5;
1606 fractionals = floor(log10(im->ygrid_scale.gridstep*(double)im->ygrid_scale.labfact*im->viewfactor/im->magfact));
1607 if(fractionals < 0) { /* small amplitude. */
1608 int len = decimals - fractionals + 1;
1609 if (im->unitslength < len+2) im->unitslength = len+2;
1610 sprintf(im->ygrid_scale.labfmt, "%%%d.%df%s", len, -fractionals,(im->symbol != ' ' ? " %c" : ""));
1612 int len = decimals + 1;
1613 if (im->unitslength < len+2) im->unitslength = len+2;
1614 sprintf(im->ygrid_scale.labfmt, "%%%d.0f%s", len, ( im->symbol != ' ' ? " %c" : "" ));
1618 for(i=0;ylab[i].grid > 0;i++){
1619 pixel = im->ysize / (scaledrange / ylab[i].grid);
1626 if (pixel * ylab[gridind].lfac[i] >= 2.5 * im->text_prop[TEXT_PROP_AXIS].size) {
1627 im->ygrid_scale.labfact = ylab[gridind].lfac[i];
1632 im->ygrid_scale.gridstep = ylab[gridind].grid * im->magfact;
1635 im->ygrid_scale.gridstep = im->ygridstep;
1636 im->ygrid_scale.labfact = im->ylabfact;
1641 int draw_horizontal_grid(image_desc_t *im)
1645 char graph_label[100];
1647 double X0=im->xorigin;
1648 double X1=im->xorigin+im->xsize;
1650 int sgrid = (int)( im->minval / im->ygrid_scale.gridstep - 1);
1651 int egrid = (int)( im->maxval / im->ygrid_scale.gridstep + 1);
1653 scaledstep = im->ygrid_scale.gridstep/(double)im->magfact*(double)im->viewfactor;
1654 MaxY = scaledstep*(double)egrid;
1655 for (i = sgrid; i <= egrid; i++){
1656 double Y0=ytr(im,im->ygrid_scale.gridstep*i);
1657 double YN=ytr(im,im->ygrid_scale.gridstep*(i+1));
1658 if ( Y0 >= im->yorigin-im->ysize
1659 && Y0 <= im->yorigin){
1660 /* Make sure at least 2 grid labels are shown, even if it doesn't agree
1661 with the chosen settings. Add a label if required by settings, or if
1662 there is only one label so far and the next grid line is out of bounds. */
1663 if(i % im->ygrid_scale.labfact == 0 || ( nlabels==1 && (YN < im->yorigin-im->ysize || YN > im->yorigin) )){
1664 if (im->symbol == ' ') {
1665 if(im->extra_flags & ALTYGRID) {
1666 sprintf(graph_label,im->ygrid_scale.labfmt,scaledstep*(double)i);
1669 sprintf(graph_label,"%4.1f",scaledstep*(double)i);
1671 sprintf(graph_label,"%4.0f",scaledstep*(double)i);
1675 char sisym = ( i == 0 ? ' ' : im->symbol);
1676 if(im->extra_flags & ALTYGRID) {
1677 sprintf(graph_label,im->ygrid_scale.labfmt,scaledstep*(double)i,sisym);
1680 sprintf(graph_label,"%4.1f %c",scaledstep*(double)i, sisym);
1682 sprintf(graph_label,"%4.0f %c",scaledstep*(double)i, sisym);
1688 gfx_new_text ( im->canvas,
1689 X0-im->text_prop[TEXT_PROP_AXIS].size, Y0,
1690 im->graph_col[GRC_FONT],
1691 im->text_prop[TEXT_PROP_AXIS].font,
1692 im->text_prop[TEXT_PROP_AXIS].size,
1693 im->tabwidth, 0.0, GFX_H_RIGHT, GFX_V_CENTER,
1695 gfx_new_dashed_line ( im->canvas,
1698 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1699 im->grid_dash_on, im->grid_dash_off);
1701 } else if (!(im->extra_flags & NOMINOR)) {
1702 gfx_new_dashed_line ( im->canvas,
1705 GRIDWIDTH, im->graph_col[GRC_GRID],
1706 im->grid_dash_on, im->grid_dash_off);
1714 /* this is frexp for base 10 */
1715 double frexp10(double, double *);
1716 double frexp10(double x, double *e) {
1720 iexp = floor(log(fabs(x)) / log(10));
1721 mnt = x / pow(10.0, iexp);
1724 mnt = x / pow(10.0, iexp);
1730 static int AlmostEqual2sComplement (float A, float B, int maxUlps)
1733 int aInt = *(int*)&A;
1734 int bInt = *(int*)&B;
1736 /* Make sure maxUlps is non-negative and small enough that the
1737 default NAN won't compare as equal to anything. */
1739 /* assert(maxUlps > 0 && maxUlps < 4 * 1024 * 1024); */
1741 /* Make aInt lexicographically ordered as a twos-complement int */
1744 aInt = 0x80000000l - aInt;
1746 /* Make bInt lexicographically ordered as a twos-complement int */
1749 bInt = 0x80000000l - bInt;
1751 intDiff = abs(aInt - bInt);
1753 if (intDiff <= maxUlps)
1759 /* logaritmic horizontal grid */
1761 horizontal_log_grid(image_desc_t *im)
1763 double yloglab[][10] = {
1764 {1.0, 10., 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0},
1765 {1.0, 5.0, 10., 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0},
1766 {1.0, 2.0, 5.0, 7.0, 10., 0.0, 0.0, 0.0, 0.0, 0.0},
1767 {1.0, 2.0, 4.0, 6.0, 8.0, 10., 0.0, 0.0, 0.0, 0.0},
1768 {1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.},
1769 {0,0,0,0,0, 0,0,0,0,0} /* last line */ };
1771 int i, j, val_exp, min_exp;
1772 double nex; /* number of decades in data */
1773 double logscale; /* scale in logarithmic space */
1774 int exfrac = 1; /* decade spacing */
1775 int mid = -1; /* row in yloglab for major grid */
1776 double mspac; /* smallest major grid spacing (pixels) */
1777 int flab; /* first value in yloglab to use */
1778 double value, tmp, pre_value;
1780 char graph_label[100];
1782 nex = log10(im->maxval / im->minval);
1783 logscale = im->ysize / nex;
1785 /* major spacing for data with high dynamic range */
1786 while(logscale * exfrac < 3 * im->text_prop[TEXT_PROP_LEGEND].size) {
1787 if(exfrac == 1) exfrac = 3;
1791 /* major spacing for less dynamic data */
1793 /* search best row in yloglab */
1795 for(i = 0; yloglab[mid][i + 1] < 10.0; i++);
1796 mspac = logscale * log10(10.0 / yloglab[mid][i]);
1797 } while(mspac > 2 * im->text_prop[TEXT_PROP_LEGEND].size && yloglab[mid][0] > 0);
1800 /* find first value in yloglab */
1801 for(flab = 0; yloglab[mid][flab] < 10 && frexp10(im->minval, &tmp) > yloglab[mid][flab] ; flab++);
1802 if(yloglab[mid][flab] == 10.0) {
1807 if(val_exp % exfrac) val_exp += abs(-val_exp % exfrac);
1810 X1=im->xorigin+im->xsize;
1816 value = yloglab[mid][flab] * pow(10.0, val_exp);
1817 if ( AlmostEqual2sComplement(value,pre_value,4) ) break; /* it seems we are not converging */
1821 Y0 = ytr(im, value);
1822 if(Y0 <= im->yorigin - im->ysize) break;
1824 /* major grid line */
1825 gfx_new_dashed_line ( im->canvas,
1828 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1829 im->grid_dash_on, im->grid_dash_off);
1832 if (im->extra_flags & FORCE_UNITS_SI) {
1837 scale = floor(val_exp / 3.0);
1838 if( value >= 1.0 ) pvalue = pow(10.0, val_exp % 3);
1839 else pvalue = pow(10.0, ((val_exp + 1) % 3) + 2);
1840 pvalue *= yloglab[mid][flab];
1842 if ( ((scale+si_symbcenter) < (int)sizeof(si_symbol)) &&
1843 ((scale+si_symbcenter) >= 0) )
1844 symbol = si_symbol[scale+si_symbcenter];
1848 sprintf(graph_label,"%3.0f %c", pvalue, symbol);
1850 sprintf(graph_label,"%3.0e", value);
1851 gfx_new_text ( im->canvas,
1852 X0-im->text_prop[TEXT_PROP_AXIS].size, Y0,
1853 im->graph_col[GRC_FONT],
1854 im->text_prop[TEXT_PROP_AXIS].font,
1855 im->text_prop[TEXT_PROP_AXIS].size,
1856 im->tabwidth,0.0, GFX_H_RIGHT, GFX_V_CENTER,
1860 if(mid < 4 && exfrac == 1) {
1861 /* find first and last minor line behind current major line
1862 * i is the first line and j tha last */
1864 min_exp = val_exp - 1;
1865 for(i = 1; yloglab[mid][i] < 10.0; i++);
1866 i = yloglab[mid][i - 1] + 1;
1871 i = yloglab[mid][flab - 1] + 1;
1872 j = yloglab[mid][flab];
1875 /* draw minor lines below current major line */
1878 value = i * pow(10.0, min_exp);
1879 if(value < im->minval) continue;
1881 Y0 = ytr(im, value);
1882 if(Y0 <= im->yorigin - im->ysize) break;
1885 gfx_new_dashed_line ( im->canvas,
1888 GRIDWIDTH, im->graph_col[GRC_GRID],
1889 im->grid_dash_on, im->grid_dash_off);
1892 else if(exfrac > 1) {
1893 for(i = val_exp - exfrac / 3 * 2; i < val_exp; i += exfrac / 3) {
1894 value = pow(10.0, i);
1895 if(value < im->minval) continue;
1897 Y0 = ytr(im, value);
1898 if(Y0 <= im->yorigin - im->ysize) break;
1901 gfx_new_dashed_line ( im->canvas,
1904 GRIDWIDTH, im->graph_col[GRC_GRID],
1905 im->grid_dash_on, im->grid_dash_off);
1910 if(yloglab[mid][++flab] == 10.0) {
1916 /* draw minor lines after highest major line */
1917 if(mid < 4 && exfrac == 1) {
1918 /* find first and last minor line below current major line
1919 * i is the first line and j tha last */
1921 min_exp = val_exp - 1;
1922 for(i = 1; yloglab[mid][i] < 10.0; i++);
1923 i = yloglab[mid][i - 1] + 1;
1928 i = yloglab[mid][flab - 1] + 1;
1929 j = yloglab[mid][flab];
1932 /* draw minor lines below current major line */
1935 value = i * pow(10.0, min_exp);
1936 if(value < im->minval) continue;
1938 Y0 = ytr(im, value);
1939 if(Y0 <= im->yorigin - im->ysize) break;
1942 gfx_new_dashed_line ( im->canvas,
1945 GRIDWIDTH, im->graph_col[GRC_GRID],
1946 im->grid_dash_on, im->grid_dash_off);
1949 /* fancy minor gridlines */
1950 else if(exfrac > 1) {
1951 for(i = val_exp - exfrac / 3 * 2; i < val_exp; i += exfrac / 3) {
1952 value = pow(10.0, i);
1953 if(value < im->minval) continue;
1955 Y0 = ytr(im, value);
1956 if(Y0 <= im->yorigin - im->ysize) break;
1959 gfx_new_dashed_line ( im->canvas,
1962 GRIDWIDTH, im->graph_col[GRC_GRID],
1963 im->grid_dash_on, im->grid_dash_off);
1975 int xlab_sel; /* which sort of label and grid ? */
1976 time_t ti, tilab, timajor;
1978 char graph_label[100];
1979 double X0,Y0,Y1; /* points for filled graph and more*/
1982 /* the type of time grid is determined by finding
1983 the number of seconds per pixel in the graph */
1986 if(im->xlab_user.minsec == -1){
1987 factor=(im->end - im->start)/im->xsize;
1989 while ( xlab[xlab_sel+1].minsec != -1
1990 && xlab[xlab_sel+1].minsec <= factor) { xlab_sel++; } /* pick the last one */
1991 while ( xlab[xlab_sel-1].minsec == xlab[xlab_sel].minsec
1992 && xlab[xlab_sel].length > (im->end - im->start)) { xlab_sel--; } /* go back to the smallest size */
1993 im->xlab_user.gridtm = xlab[xlab_sel].gridtm;
1994 im->xlab_user.gridst = xlab[xlab_sel].gridst;
1995 im->xlab_user.mgridtm = xlab[xlab_sel].mgridtm;
1996 im->xlab_user.mgridst = xlab[xlab_sel].mgridst;
1997 im->xlab_user.labtm = xlab[xlab_sel].labtm;
1998 im->xlab_user.labst = xlab[xlab_sel].labst;
1999 im->xlab_user.precis = xlab[xlab_sel].precis;
2000 im->xlab_user.stst = xlab[xlab_sel].stst;
2003 /* y coords are the same for every line ... */
2005 Y1 = im->yorigin-im->ysize;
2008 /* paint the minor grid */
2009 if (!(im->extra_flags & NOMINOR))
2011 for(ti = find_first_time(im->start,
2012 im->xlab_user.gridtm,
2013 im->xlab_user.gridst),
2014 timajor = find_first_time(im->start,
2015 im->xlab_user.mgridtm,
2016 im->xlab_user.mgridst);
2018 ti = find_next_time(ti,im->xlab_user.gridtm,im->xlab_user.gridst)
2020 /* are we inside the graph ? */
2021 if (ti < im->start || ti > im->end) continue;
2022 while (timajor < ti) {
2023 timajor = find_next_time(timajor,
2024 im->xlab_user.mgridtm, im->xlab_user.mgridst);
2026 if (ti == timajor) continue; /* skip as falls on major grid line */
2028 gfx_new_dashed_line(im->canvas,X0,Y0+1, X0,Y1-1,GRIDWIDTH,
2029 im->graph_col[GRC_GRID],
2030 im->grid_dash_on, im->grid_dash_off);
2035 /* paint the major grid */
2036 for(ti = find_first_time(im->start,
2037 im->xlab_user.mgridtm,
2038 im->xlab_user.mgridst);
2040 ti = find_next_time(ti,im->xlab_user.mgridtm,im->xlab_user.mgridst)
2042 /* are we inside the graph ? */
2043 if (ti < im->start || ti > im->end) continue;
2045 gfx_new_dashed_line(im->canvas,X0,Y0+3, X0,Y1-2,MGRIDWIDTH,
2046 im->graph_col[GRC_MGRID],
2047 im->grid_dash_on, im->grid_dash_off);
2050 /* paint the labels below the graph */
2051 for(ti = find_first_time(im->start - im->xlab_user.precis/2,
2052 im->xlab_user.labtm,
2053 im->xlab_user.labst);
2054 ti <= im->end - im->xlab_user.precis/2;
2055 ti = find_next_time(ti,im->xlab_user.labtm,im->xlab_user.labst)
2057 tilab= ti + im->xlab_user.precis/2; /* correct time for the label */
2058 /* are we inside the graph ? */
2059 if (tilab < im->start || tilab > im->end) continue;
2062 localtime_r(&tilab, &tm);
2063 strftime(graph_label,99,im->xlab_user.stst, &tm);
2065 # error "your libc has no strftime I guess we'll abort the exercise here."
2067 gfx_new_text ( im->canvas,
2068 xtr(im,tilab), Y0+im->text_prop[TEXT_PROP_AXIS].size*1.4+5,
2069 im->graph_col[GRC_FONT],
2070 im->text_prop[TEXT_PROP_AXIS].font,
2071 im->text_prop[TEXT_PROP_AXIS].size,
2072 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_BOTTOM,
2085 /* draw x and y axis */
2086 /* gfx_new_line ( im->canvas, im->xorigin+im->xsize,im->yorigin,
2087 im->xorigin+im->xsize,im->yorigin-im->ysize,
2088 GRIDWIDTH, im->graph_col[GRC_AXIS]);
2090 gfx_new_line ( im->canvas, im->xorigin,im->yorigin-im->ysize,
2091 im->xorigin+im->xsize,im->yorigin-im->ysize,
2092 GRIDWIDTH, im->graph_col[GRC_AXIS]); */
2094 gfx_new_line ( im->canvas, im->xorigin-4,im->yorigin,
2095 im->xorigin+im->xsize+4,im->yorigin,
2096 MGRIDWIDTH, im->graph_col[GRC_AXIS]);
2098 gfx_new_line ( im->canvas, im->xorigin,im->yorigin+4,
2099 im->xorigin,im->yorigin-im->ysize-4,
2100 MGRIDWIDTH, im->graph_col[GRC_AXIS]);
2103 /* arrow for X and Y axis direction */
2104 gfx_new_area ( im->canvas,
2105 im->xorigin+im->xsize+2, im->yorigin-2,
2106 im->xorigin+im->xsize+2, im->yorigin+3,
2107 im->xorigin+im->xsize+7, im->yorigin+0.5, /* LINEOFFSET */
2108 im->graph_col[GRC_ARROW]);
2110 gfx_new_area ( im->canvas,
2111 im->xorigin-2, im->yorigin-im->ysize-2,
2112 im->xorigin+3, im->yorigin-im->ysize-2,
2113 im->xorigin+0.5, im->yorigin-im->ysize-7, /* LINEOFFSET */
2114 im->graph_col[GRC_ARROW]);
2119 grid_paint(image_desc_t *im)
2123 double X0,Y0; /* points for filled graph and more*/
2126 /* draw 3d border */
2127 node = gfx_new_area (im->canvas, 0,im->yimg,
2129 2,2,im->graph_col[GRC_SHADEA]);
2130 gfx_add_point( node , im->ximg - 2, 2 );
2131 gfx_add_point( node , im->ximg, 0 );
2132 gfx_add_point( node , 0,0 );
2133 /* gfx_add_point( node , 0,im->yimg ); */
2135 node = gfx_new_area (im->canvas, 2,im->yimg-2,
2136 im->ximg-2,im->yimg-2,
2138 im->graph_col[GRC_SHADEB]);
2139 gfx_add_point( node , im->ximg,0);
2140 gfx_add_point( node , im->ximg,im->yimg);
2141 gfx_add_point( node , 0,im->yimg);
2142 /* gfx_add_point( node , 0,im->yimg ); */
2145 if (im->draw_x_grid == 1 )
2148 if (im->draw_y_grid == 1){
2149 if(im->logarithmic){
2150 res = horizontal_log_grid(im);
2152 res = draw_horizontal_grid(im);
2155 /* dont draw horizontal grid if there is no min and max val */
2157 char *nodata = "No Data found";
2158 gfx_new_text(im->canvas,im->ximg/2, (2*im->yorigin-im->ysize) / 2,
2159 im->graph_col[GRC_FONT],
2160 im->text_prop[TEXT_PROP_AXIS].font,
2161 im->text_prop[TEXT_PROP_AXIS].size,
2162 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_CENTER,
2167 /* yaxis unit description */
2168 gfx_new_text( im->canvas,
2169 10, (im->yorigin - im->ysize/2),
2170 im->graph_col[GRC_FONT],
2171 im->text_prop[TEXT_PROP_UNIT].font,
2172 im->text_prop[TEXT_PROP_UNIT].size, im->tabwidth,
2173 RRDGRAPH_YLEGEND_ANGLE,
2174 GFX_H_LEFT, GFX_V_CENTER,
2178 gfx_new_text( im->canvas,
2179 im->ximg/2, im->text_prop[TEXT_PROP_TITLE].size*1.3+4,
2180 im->graph_col[GRC_FONT],
2181 im->text_prop[TEXT_PROP_TITLE].font,
2182 im->text_prop[TEXT_PROP_TITLE].size, im->tabwidth, 0.0,
2183 GFX_H_CENTER, GFX_V_CENTER,
2185 /* rrdtool 'logo' */
2186 gfx_new_text( im->canvas,
2188 ( im->graph_col[GRC_FONT] & 0xffffff00 ) | 0x00000044,
2189 im->text_prop[TEXT_PROP_AXIS].font,
2190 5.5, im->tabwidth, 270,
2191 GFX_H_RIGHT, GFX_V_TOP,
2192 "RRDTOOL / TOBI OETIKER");
2194 /* graph watermark */
2195 if(im->watermark[0] != '\0') {
2196 gfx_new_text( im->canvas,
2197 im->ximg/2, im->yimg-6,
2198 ( im->graph_col[GRC_FONT] & 0xffffff00 ) | 0x00000044,
2199 im->text_prop[TEXT_PROP_AXIS].font,
2200 5.5, im->tabwidth, 0,
2201 GFX_H_CENTER, GFX_V_BOTTOM,
2206 if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
2207 for(i=0;i<im->gdes_c;i++){
2208 if(im->gdes[i].legend[0] =='\0')
2211 /* im->gdes[i].leg_y is the bottom of the legend */
2212 X0 = im->gdes[i].leg_x;
2213 Y0 = im->gdes[i].leg_y;
2214 gfx_new_text ( im->canvas, X0, Y0,
2215 im->graph_col[GRC_FONT],
2216 im->text_prop[TEXT_PROP_LEGEND].font,
2217 im->text_prop[TEXT_PROP_LEGEND].size,
2218 im->tabwidth,0.0, GFX_H_LEFT, GFX_V_BOTTOM,
2219 im->gdes[i].legend );
2220 /* The legend for GRAPH items starts with "M " to have
2221 enough space for the box */
2222 if ( im->gdes[i].gf != GF_PRINT &&
2223 im->gdes[i].gf != GF_GPRINT &&
2224 im->gdes[i].gf != GF_COMMENT) {
2227 boxH = gfx_get_text_width(im->canvas, 0,
2228 im->text_prop[TEXT_PROP_LEGEND].font,
2229 im->text_prop[TEXT_PROP_LEGEND].size,
2230 im->tabwidth,"o", 0) * 1.2;
2233 /* make sure transparent colors show up the same way as in the graph */
2234 node = gfx_new_area(im->canvas,
2238 im->graph_col[GRC_BACK]);
2239 gfx_add_point ( node, X0+boxH, Y0-boxV );
2241 node = gfx_new_area(im->canvas,
2246 gfx_add_point ( node, X0+boxH, Y0-boxV );
2247 node = gfx_new_line(im->canvas,
2250 1.0,im->graph_col[GRC_FRAME]);
2251 gfx_add_point(node,X0+boxH,Y0);
2252 gfx_add_point(node,X0+boxH,Y0-boxV);
2253 gfx_close_path(node);
2260 /*****************************************************
2261 * lazy check make sure we rely need to create this graph
2262 *****************************************************/
2264 int lazy_check(image_desc_t *im){
2267 struct stat imgstat;
2269 if (im->lazy == 0) return 0; /* no lazy option */
2270 if (stat(im->graphfile,&imgstat) != 0)
2271 return 0; /* can't stat */
2272 /* one pixel in the existing graph is more then what we would
2274 if (time(NULL) - imgstat.st_mtime >
2275 (im->end - im->start) / im->xsize)
2277 if ((fd = fopen(im->graphfile,"rb")) == NULL)
2278 return 0; /* the file does not exist */
2279 switch (im->canvas->imgformat) {
2281 size = PngSize(fd,&(im->ximg),&(im->yimg));
2290 #ifdef WITH_PIECHART
2292 pie_part(image_desc_t *im, gfx_color_t color,
2293 double PieCenterX, double PieCenterY, double Radius,
2294 double startangle, double endangle)
2298 double step=M_PI/50; /* Number of iterations for the circle;
2299 ** 10 is definitely too low, more than
2300 ** 50 seems to be overkill
2303 /* Strange but true: we have to work clockwise or else
2304 ** anti aliasing nor transparency don't work.
2306 ** This test is here to make sure we do it right, also
2307 ** this makes the for...next loop more easy to implement.
2308 ** The return will occur if the user enters a negative number
2309 ** (which shouldn't be done according to the specs) or if the
2310 ** programmers do something wrong (which, as we all know, never
2311 ** happens anyway :)
2313 if (endangle<startangle) return;
2315 /* Hidden feature: Radius decreases each full circle */
2317 while (angle>=2*M_PI) {
2322 node=gfx_new_area(im->canvas,
2323 PieCenterX+sin(startangle)*Radius,
2324 PieCenterY-cos(startangle)*Radius,
2327 PieCenterX+sin(endangle)*Radius,
2328 PieCenterY-cos(endangle)*Radius,
2330 for (angle=endangle;angle-startangle>=step;angle-=step) {
2332 PieCenterX+sin(angle)*Radius,
2333 PieCenterY-cos(angle)*Radius );
2340 graph_size_location(image_desc_t *im, int elements
2342 #ifdef WITH_PIECHART
2348 /* The actual size of the image to draw is determined from
2349 ** several sources. The size given on the command line is
2350 ** the graph area but we need more as we have to draw labels
2351 ** and other things outside the graph area
2354 /* +-+-------------------------------------------+
2355 ** |l|.................title.....................|
2356 ** |e+--+-------------------------------+--------+
2359 ** |l| l| main graph area | chart |
2362 ** |r+--+-------------------------------+--------+
2363 ** |e| | x-axis labels | |
2364 ** |v+--+-------------------------------+--------+
2365 ** | |..............legends......................|
2366 ** +-+-------------------------------------------+
2368 ** +---------------------------------------------+
2374 #ifdef WITH_PIECHART
2379 Xlegend =0, Ylegend =0,
2381 Xspacing =15, Yspacing =15,
2385 if (im->extra_flags & ONLY_GRAPH) {
2387 im->ximg = im->xsize;
2388 im->yimg = im->ysize;
2389 im->yorigin = im->ysize;
2394 if (im->ylegend[0] != '\0' ) {
2395 Xvertical = im->text_prop[TEXT_PROP_UNIT].size *2;
2399 if (im->title[0] != '\0') {
2400 /* The title is placed "inbetween" two text lines so it
2401 ** automatically has some vertical spacing. The horizontal
2402 ** spacing is added here, on each side.
2404 /* don't care for the with of the title
2405 Xtitle = gfx_get_text_width(im->canvas, 0,
2406 im->text_prop[TEXT_PROP_TITLE].font,
2407 im->text_prop[TEXT_PROP_TITLE].size,
2409 im->title, 0) + 2*Xspacing; */
2410 Ytitle = im->text_prop[TEXT_PROP_TITLE].size*2.6+10;
2416 if (im->draw_x_grid) {
2417 Yxlabel=im->text_prop[TEXT_PROP_AXIS].size *2.5;
2419 if (im->draw_y_grid) {
2420 Xylabel=gfx_get_text_width(im->canvas, 0,
2421 im->text_prop[TEXT_PROP_AXIS].font,
2422 im->text_prop[TEXT_PROP_AXIS].size,
2424 "0", 0) * im->unitslength;
2428 #ifdef WITH_PIECHART
2430 im->piesize=im->xsize<im->ysize?im->xsize:im->ysize;
2436 /* Now calculate the total size. Insert some spacing where
2437 desired. im->xorigin and im->yorigin need to correspond
2438 with the lower left corner of the main graph area or, if
2439 this one is not set, the imaginary box surrounding the
2442 /* The legend width cannot yet be determined, as a result we
2443 ** have problems adjusting the image to it. For now, we just
2444 ** forget about it at all; the legend will have to fit in the
2445 ** size already allocated.
2447 im->ximg = Xylabel + Xmain + 2 * Xspacing;
2449 #ifdef WITH_PIECHART
2453 if (Xmain) im->ximg += Xspacing;
2454 #ifdef WITH_PIECHART
2455 if (Xpie) im->ximg += Xspacing;
2458 im->xorigin = Xspacing + Xylabel;
2460 /* the length of the title should not influence with width of the graph
2461 if (Xtitle > im->ximg) im->ximg = Xtitle; */
2463 if (Xvertical) { /* unit description */
2464 im->ximg += Xvertical;
2465 im->xorigin += Xvertical;
2469 /* The vertical size is interesting... we need to compare
2470 ** the sum of {Ytitle, Ymain, Yxlabel, Ylegend, Ywatermark} with
2471 ** Yvertical however we need to know {Ytitle+Ymain+Yxlabel}
2472 ** in order to start even thinking about Ylegend or Ywatermark.
2474 ** Do it in three portions: First calculate the inner part,
2475 ** then do the legend, then adjust the total height of the img,
2476 ** adding space for a watermark if one exists;
2479 /* reserve space for main and/or pie */
2481 im->yimg = Ymain + Yxlabel;
2483 #ifdef WITH_PIECHART
2484 if (im->yimg < Ypie) im->yimg = Ypie;
2487 im->yorigin = im->yimg - Yxlabel;
2489 /* reserve space for the title *or* some padding above the graph */
2492 im->yorigin += Ytitle;
2494 im->yimg += 1.5*Yspacing;
2495 im->yorigin += 1.5*Yspacing;
2497 /* reserve space for padding below the graph */
2498 im->yimg += Yspacing;
2500 /* Determine where to place the legends onto the image.
2501 ** Adjust im->yimg to match the space requirements.
2503 if(leg_place(im)==-1)
2506 if (im->watermark[0] != '\0') {
2507 im->yimg += Ywatermark;
2511 if (Xlegend > im->ximg) {
2513 /* reposition Pie */
2517 #ifdef WITH_PIECHART
2518 /* The pie is placed in the upper right hand corner,
2519 ** just below the title (if any) and with sufficient
2523 im->pie_x = im->ximg - Xspacing - Xpie/2;
2524 im->pie_y = im->yorigin-Ymain+Ypie/2;
2526 im->pie_x = im->ximg/2;
2527 im->pie_y = im->yorigin-Ypie/2;
2535 /* from http://www.cygnus-software.com/papers/comparingfloats/comparingfloats.htm */
2536 /* yes we are loosing precision by doing tos with floats instead of doubles
2537 but it seems more stable this way. */
2540 /* draw that picture thing ... */
2542 graph_paint(image_desc_t *im, char ***calcpr)
2545 int lazy = lazy_check(im);
2546 #ifdef WITH_PIECHART
2548 double PieStart=0.0;
2553 double areazero = 0.0;
2554 graph_desc_t *lastgdes = NULL;
2556 /* if we are lazy and there is nothing to PRINT ... quit now */
2557 if (lazy && im->prt_c==0) return 0;
2559 /* pull the data from the rrd files ... */
2561 if(data_fetch(im)==-1)
2564 /* evaluate VDEF and CDEF operations ... */
2565 if(data_calc(im)==-1)
2568 #ifdef WITH_PIECHART
2569 /* check if we need to draw a piechart */
2570 for(i=0;i<im->gdes_c;i++){
2571 if (im->gdes[i].gf == GF_PART) {
2578 /* calculate and PRINT and GPRINT definitions. We have to do it at
2579 * this point because it will affect the length of the legends
2580 * if there are no graph elements we stop here ...
2581 * if we are lazy, try to quit ...
2583 i=print_calc(im,calcpr);
2586 #ifdef WITH_PIECHART
2589 ) || lazy) return 0;
2591 #ifdef WITH_PIECHART
2592 /* If there's only the pie chart to draw, signal this */
2593 if (i==0) piechart=2;
2596 /* get actual drawing data and find min and max values*/
2597 if(data_proc(im)==-1)
2600 if(!im->logarithmic){si_unit(im);} /* identify si magnitude Kilo, Mega Giga ? */
2602 if(!im->rigid && ! im->logarithmic)
2603 expand_range(im); /* make sure the upper and lower limit are
2606 if (!calc_horizontal_grid(im))
2613 /**************************************************************
2614 *** Calculating sizes and locations became a bit confusing ***
2615 *** so I moved this into a separate function. ***
2616 **************************************************************/
2617 if(graph_size_location(im,i
2618 #ifdef WITH_PIECHART
2624 /* the actual graph is created by going through the individual
2625 graph elements and then drawing them */
2627 node=gfx_new_area ( im->canvas,
2631 im->graph_col[GRC_BACK]);
2633 gfx_add_point(node,im->ximg, 0);
2635 #ifdef WITH_PIECHART
2636 if (piechart != 2) {
2638 node=gfx_new_area ( im->canvas,
2639 im->xorigin, im->yorigin,
2640 im->xorigin + im->xsize, im->yorigin,
2641 im->xorigin + im->xsize, im->yorigin-im->ysize,
2642 im->graph_col[GRC_CANVAS]);
2644 gfx_add_point(node,im->xorigin, im->yorigin - im->ysize);
2646 if (im->minval > 0.0)
2647 areazero = im->minval;
2648 if (im->maxval < 0.0)
2649 areazero = im->maxval;
2650 #ifdef WITH_PIECHART
2654 #ifdef WITH_PIECHART
2656 pie_part(im,im->graph_col[GRC_CANVAS],im->pie_x,im->pie_y,im->piesize*0.5,0,2*M_PI);
2660 for(i=0;i<im->gdes_c;i++){
2661 switch(im->gdes[i].gf){
2674 for (ii = 0; ii < im->xsize; ii++)
2676 if (!isnan(im->gdes[i].p_data[ii]) &&
2677 im->gdes[i].p_data[ii] != 0.0)
2679 if (im -> gdes[i].yrule > 0 ) {
2680 gfx_new_line(im->canvas,
2681 im -> xorigin + ii, im->yorigin,
2682 im -> xorigin + ii, im->yorigin - im -> gdes[i].yrule * im -> ysize,
2684 im -> gdes[i].col );
2685 } else if ( im -> gdes[i].yrule < 0 ) {
2686 gfx_new_line(im->canvas,
2687 im -> xorigin + ii, im->yorigin - im -> ysize,
2688 im -> xorigin + ii, im->yorigin - ( 1 - im -> gdes[i].yrule ) * im -> ysize,
2690 im -> gdes[i].col );
2698 /* fix data points at oo and -oo */
2699 for(ii=0;ii<im->xsize;ii++){
2700 if (isinf(im->gdes[i].p_data[ii])){
2701 if (im->gdes[i].p_data[ii] > 0) {
2702 im->gdes[i].p_data[ii] = im->maxval ;
2704 im->gdes[i].p_data[ii] = im->minval ;
2710 /* *******************************************************
2715 -------|--t-1--t--------------------------------
2717 if we know the value at time t was a then
2718 we draw a square from t-1 to t with the value a.
2720 ********************************************************* */
2721 if (im->gdes[i].col != 0x0){
2722 /* GF_LINE and friend */
2723 if(im->gdes[i].gf == GF_LINE ){
2726 for(ii=1;ii<im->xsize;ii++){
2727 if (isnan(im->gdes[i].p_data[ii]) || (im->slopemode==1 && isnan(im->gdes[i].p_data[ii-1]))){
2731 if ( node == NULL ) {
2732 last_y = ytr(im,im->gdes[i].p_data[ii]);
2733 if ( im->slopemode == 0 ){
2734 node = gfx_new_line(im->canvas,
2735 ii-1+im->xorigin,last_y,
2736 ii+im->xorigin,last_y,
2737 im->gdes[i].linewidth,
2740 node = gfx_new_line(im->canvas,
2741 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii-1]),
2742 ii+im->xorigin,last_y,
2743 im->gdes[i].linewidth,
2747 double new_y = ytr(im,im->gdes[i].p_data[ii]);
2748 if ( im->slopemode==0 && ! AlmostEqual2sComplement(new_y,last_y,4)){
2749 gfx_add_point(node,ii-1+im->xorigin,new_y);
2752 gfx_add_point(node,ii+im->xorigin,new_y);
2758 double *foreY=malloc(sizeof(double)*im->xsize*2);
2759 double *foreX=malloc(sizeof(double)*im->xsize*2);
2760 double *backY=malloc(sizeof(double)*im->xsize*2);
2761 double *backX=malloc(sizeof(double)*im->xsize*2);
2763 for(ii=0;ii<=im->xsize;ii++){
2765 if ( idxI > 0 && ( drawem != 0 || ii==im->xsize)){
2768 while (cntI < idxI && AlmostEqual2sComplement(foreY[lastI],foreY[cntI],4) && AlmostEqual2sComplement(foreY[lastI],foreY[cntI+1],4)){cntI++;}
2769 node = gfx_new_area(im->canvas,
2772 foreX[cntI],foreY[cntI], im->gdes[i].col);
2773 while (cntI < idxI) {
2776 while ( cntI < idxI && AlmostEqual2sComplement(foreY[lastI],foreY[cntI],4) && AlmostEqual2sComplement(foreY[lastI],foreY[cntI+1],4)){cntI++;}
2777 gfx_add_point(node,foreX[cntI],foreY[cntI]);
2779 gfx_add_point(node,backX[idxI],backY[idxI]);
2783 while ( idxI > 1 && AlmostEqual2sComplement(backY[lastI], backY[idxI],4) && AlmostEqual2sComplement(backY[lastI],backY[idxI-1],4)){idxI--;}
2784 gfx_add_point(node,backX[idxI],backY[idxI]);
2793 if (ii == im->xsize) break;
2795 /* keep things simple for now, just draw these bars
2796 do not try to build a big and complex area */
2799 if ( im->slopemode == 0 && ii==0){
2802 if ( isnan(im->gdes[i].p_data[ii]) ) {
2806 ytop = ytr(im,im->gdes[i].p_data[ii]);
2807 if ( lastgdes && im->gdes[i].stack ) {
2808 ybase = ytr(im,lastgdes->p_data[ii]);
2810 ybase = ytr(im,areazero);
2812 if ( ybase == ytop ){
2816 /* every area has to be wound clock-wise,
2817 so we have to make sur base remains base */
2819 double extra = ytop;
2823 if ( im->slopemode == 0 ){
2824 backY[++idxI] = ybase-0.2;
2825 backX[idxI] = ii+im->xorigin-1;
2826 foreY[idxI] = ytop+0.2;
2827 foreX[idxI] = ii+im->xorigin-1;
2829 backY[++idxI] = ybase-0.2;
2830 backX[idxI] = ii+im->xorigin;
2831 foreY[idxI] = ytop+0.2;
2832 foreX[idxI] = ii+im->xorigin;
2834 /* close up any remaining area */
2839 } /* else GF_LINE */
2840 } /* if color != 0x0 */
2841 /* make sure we do not run into trouble when stacking on NaN */
2842 for(ii=0;ii<im->xsize;ii++){
2843 if (isnan(im->gdes[i].p_data[ii])) {
2844 if (lastgdes && (im->gdes[i].stack)) {
2845 im->gdes[i].p_data[ii] = lastgdes->p_data[ii];
2847 im->gdes[i].p_data[ii] = areazero;
2851 lastgdes = &(im->gdes[i]);
2853 #ifdef WITH_PIECHART
2855 if(isnan(im->gdes[i].yrule)) /* fetch variable */
2856 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2858 if (finite(im->gdes[i].yrule)) { /* even the fetched var can be NaN */
2859 pie_part(im,im->gdes[i].col,
2860 im->pie_x,im->pie_y,im->piesize*0.4,
2861 M_PI*2.0*PieStart/100.0,
2862 M_PI*2.0*(PieStart+im->gdes[i].yrule)/100.0);
2863 PieStart += im->gdes[i].yrule;
2868 rrd_set_error("STACK should already be turned into LINE or AREA here");
2874 #ifdef WITH_PIECHART
2882 /* grid_paint also does the text */
2883 if( !(im->extra_flags & ONLY_GRAPH) )
2887 if( !(im->extra_flags & ONLY_GRAPH) )
2890 /* the RULES are the last thing to paint ... */
2891 for(i=0;i<im->gdes_c;i++){
2893 switch(im->gdes[i].gf){
2895 if(im->gdes[i].yrule >= im->minval
2896 && im->gdes[i].yrule <= im->maxval)
2897 gfx_new_line(im->canvas,
2898 im->xorigin,ytr(im,im->gdes[i].yrule),
2899 im->xorigin+im->xsize,ytr(im,im->gdes[i].yrule),
2900 1.0,im->gdes[i].col);
2903 if(im->gdes[i].xrule >= im->start
2904 && im->gdes[i].xrule <= im->end)
2905 gfx_new_line(im->canvas,
2906 xtr(im,im->gdes[i].xrule),im->yorigin,
2907 xtr(im,im->gdes[i].xrule),im->yorigin-im->ysize,
2908 1.0,im->gdes[i].col);
2916 if (strcmp(im->graphfile,"-")==0) {
2917 fo = im->graphhandle ? im->graphhandle : stdout;
2918 #if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
2919 /* Change translation mode for stdout to BINARY */
2920 _setmode( _fileno( fo ), O_BINARY );
2923 if ((fo = fopen(im->graphfile,"wb")) == NULL) {
2924 rrd_set_error("Opening '%s' for write: %s",im->graphfile,
2925 rrd_strerror(errno));
2929 gfx_render (im->canvas,im->ximg,im->yimg,0x00000000,fo);
2930 if (strcmp(im->graphfile,"-") != 0)
2936 /*****************************************************
2938 *****************************************************/
2941 gdes_alloc(image_desc_t *im){
2944 if ((im->gdes = (graph_desc_t *) rrd_realloc(im->gdes, (im->gdes_c)
2945 * sizeof(graph_desc_t)))==NULL){
2946 rrd_set_error("realloc graph_descs");
2951 im->gdes[im->gdes_c-1].step=im->step;
2952 im->gdes[im->gdes_c-1].step_orig=im->step;
2953 im->gdes[im->gdes_c-1].stack=0;
2954 im->gdes[im->gdes_c-1].linewidth=0;
2955 im->gdes[im->gdes_c-1].debug=0;
2956 im->gdes[im->gdes_c-1].start=im->start;
2957 im->gdes[im->gdes_c-1].start_orig=im->start;
2958 im->gdes[im->gdes_c-1].end=im->end;
2959 im->gdes[im->gdes_c-1].end_orig=im->end;
2960 im->gdes[im->gdes_c-1].vname[0]='\0';
2961 im->gdes[im->gdes_c-1].data=NULL;
2962 im->gdes[im->gdes_c-1].ds_namv=NULL;
2963 im->gdes[im->gdes_c-1].data_first=0;
2964 im->gdes[im->gdes_c-1].p_data=NULL;
2965 im->gdes[im->gdes_c-1].rpnp=NULL;
2966 im->gdes[im->gdes_c-1].shift=0;
2967 im->gdes[im->gdes_c-1].col = 0x0;
2968 im->gdes[im->gdes_c-1].legend[0]='\0';
2969 im->gdes[im->gdes_c-1].format[0]='\0';
2970 im->gdes[im->gdes_c-1].strftm=0;
2971 im->gdes[im->gdes_c-1].rrd[0]='\0';
2972 im->gdes[im->gdes_c-1].ds=-1;
2973 im->gdes[im->gdes_c-1].cf_reduce=CF_AVERAGE;
2974 im->gdes[im->gdes_c-1].cf=CF_AVERAGE;
2975 im->gdes[im->gdes_c-1].p_data=NULL;
2976 im->gdes[im->gdes_c-1].yrule=DNAN;
2977 im->gdes[im->gdes_c-1].xrule=0;
2981 /* copies input untill the first unescaped colon is found
2982 or until input ends. backslashes have to be escaped as well */
2984 scan_for_col(const char *const input, int len, char *const output)
2989 input[inp] != ':' &&
2992 if (input[inp] == '\\' &&
2993 input[inp+1] != '\0' &&
2994 (input[inp+1] == '\\' ||
2995 input[inp+1] == ':')){
2996 output[outp++] = input[++inp];
2999 output[outp++] = input[inp];
3002 output[outp] = '\0';
3005 /* Some surgery done on this function, it became ridiculously big.
3007 ** - initializing now in rrd_graph_init()
3008 ** - options parsing now in rrd_graph_options()
3009 ** - script parsing now in rrd_graph_script()
3012 rrd_graph(int argc, char **argv, char ***prdata, int *xsize, int *ysize, FILE *stream, double *ymin, double *ymax)
3015 rrd_graph_init(&im);
3016 im.graphhandle = stream;
3018 rrd_graph_options(argc,argv,&im);
3019 if (rrd_test_error()) {
3024 if (strlen(argv[optind])>=MAXPATH) {
3025 rrd_set_error("filename (including path) too long");
3029 strncpy(im.graphfile,argv[optind],MAXPATH-1);
3030 im.graphfile[MAXPATH-1]='\0';
3032 rrd_graph_script(argc,argv,&im,1);
3033 if (rrd_test_error()) {
3038 /* Everything is now read and the actual work can start */
3041 if (graph_paint(&im,prdata)==-1){
3046 /* The image is generated and needs to be output.
3047 ** Also, if needed, print a line with information about the image.
3057 /* maybe prdata is not allocated yet ... lets do it now */
3058 if ((*prdata = calloc(2,sizeof(char *)))==NULL) {
3059 rrd_set_error("malloc imginfo");
3063 if(((*prdata)[0] = malloc((strlen(im.imginfo)+200+strlen(im.graphfile))*sizeof(char)))
3065 rrd_set_error("malloc imginfo");
3068 filename=im.graphfile+strlen(im.graphfile);
3069 while(filename > im.graphfile) {
3070 if (*(filename-1)=='/' || *(filename-1)=='\\' ) break;
3074 sprintf((*prdata)[0],im.imginfo,filename,(long)(im.canvas->zoom*im.ximg),(long)(im.canvas->zoom*im.yimg));
3081 rrd_graph_init(image_desc_t *im)
3088 #ifdef HAVE_SETLOCALE
3089 setlocale(LC_TIME,"");
3090 #ifdef HAVE_MBSTOWCS
3091 setlocale(LC_CTYPE,"");
3097 im->xlab_user.minsec = -1;
3103 im->ylegend[0] = '\0';
3104 im->title[0] = '\0';
3105 im->watermark[0] = '\0';
3108 im->unitsexponent= 9999;
3111 im->viewfactor = 1.0;
3118 im->logarithmic = 0;
3119 im->ygridstep = DNAN;
3120 im->draw_x_grid = 1;
3121 im->draw_y_grid = 1;
3126 im->canvas = gfx_new_canvas();
3127 im->grid_dash_on = 1;
3128 im->grid_dash_off = 1;
3129 im->tabwidth = 40.0;
3131 for(i=0;i<DIM(graph_col);i++)
3132 im->graph_col[i]=graph_col[i];
3134 #if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
3137 char rrd_win_default_font[1000];
3138 windir = getenv("windir");
3139 /* %windir% is something like D:\windows or C:\winnt */
3140 if (windir != NULL) {
3141 strncpy(rrd_win_default_font,windir,500);
3142 rrd_win_default_font[500] = '\0';
3143 strcat(rrd_win_default_font,"\\fonts\\");
3144 strcat(rrd_win_default_font,RRD_DEFAULT_FONT);
3145 for(i=0;i<DIM(text_prop);i++){
3146 strncpy(text_prop[i].font,rrd_win_default_font,sizeof(text_prop[i].font)-1);
3147 text_prop[i].font[sizeof(text_prop[i].font)-1] = '\0';
3154 deffont = getenv("RRD_DEFAULT_FONT");
3155 if (deffont != NULL) {
3156 for(i=0;i<DIM(text_prop);i++){
3157 strncpy(text_prop[i].font,deffont,sizeof(text_prop[i].font)-1);
3158 text_prop[i].font[sizeof(text_prop[i].font)-1] = '\0';
3162 for(i=0;i<DIM(text_prop);i++){
3163 im->text_prop[i].size = text_prop[i].size;
3164 strcpy(im->text_prop[i].font,text_prop[i].font);
3169 rrd_graph_options(int argc, char *argv[],image_desc_t *im)
3172 char *parsetime_error = NULL;
3173 char scan_gtm[12],scan_mtm[12],scan_ltm[12],col_nam[12];
3174 time_t start_tmp=0,end_tmp=0;
3176 struct rrd_time_value start_tv, end_tv;
3178 optind = 0; opterr = 0; /* initialize getopt */
3180 parsetime("end-24h", &start_tv);
3181 parsetime("now", &end_tv);
3183 /* defines for long options without a short equivalent. should be bytes,
3184 and may not collide with (the ASCII value of) short options */
3185 #define LONGOPT_UNITS_SI 255
3188 static struct option long_options[] =
3190 {"start", required_argument, 0, 's'},
3191 {"end", required_argument, 0, 'e'},
3192 {"x-grid", required_argument, 0, 'x'},
3193 {"y-grid", required_argument, 0, 'y'},
3194 {"vertical-label",required_argument,0,'v'},
3195 {"width", required_argument, 0, 'w'},
3196 {"height", required_argument, 0, 'h'},
3197 {"interlaced", no_argument, 0, 'i'},
3198 {"upper-limit",required_argument, 0, 'u'},
3199 {"lower-limit",required_argument, 0, 'l'},
3200 {"rigid", no_argument, 0, 'r'},
3201 {"base", required_argument, 0, 'b'},
3202 {"logarithmic",no_argument, 0, 'o'},
3203 {"color", required_argument, 0, 'c'},
3204 {"font", required_argument, 0, 'n'},
3205 {"title", required_argument, 0, 't'},
3206 {"imginfo", required_argument, 0, 'f'},
3207 {"imgformat", required_argument, 0, 'a'},
3208 {"lazy", no_argument, 0, 'z'},
3209 {"zoom", required_argument, 0, 'm'},
3210 {"no-legend", no_argument, 0, 'g'},
3211 {"force-rules-legend",no_argument,0, 'F'},
3212 {"only-graph", no_argument, 0, 'j'},
3213 {"alt-y-grid", no_argument, 0, 'Y'},
3214 {"no-minor", no_argument, 0, 'I'},
3215 {"slope-mode", no_argument, 0, 'E'},
3216 {"alt-autoscale", no_argument, 0, 'A'},
3217 {"alt-autoscale-max", no_argument, 0, 'M'},
3218 {"no-gridfit", no_argument, 0, 'N'},
3219 {"units-exponent",required_argument, 0, 'X'},
3220 {"units-length",required_argument, 0, 'L'},
3221 {"units", required_argument, 0, LONGOPT_UNITS_SI },
3222 {"step", required_argument, 0, 'S'},
3223 {"tabwidth", required_argument, 0, 'T'},
3224 {"font-render-mode", required_argument, 0, 'R'},
3225 {"font-smoothing-threshold", required_argument, 0, 'B'},
3226 {"watermark", required_argument, 0, 'W'},
3227 {"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 */
3229 int option_index = 0;
3231 int col_start,col_end;
3233 opt = getopt_long(argc, argv,
3234 "s:e:x:y:v:w:h:iu:l:rb:oc:n:m:t:f:a:I:zgjFYAMEX:L:S:T:NR:B:W:",
3235 long_options, &option_index);
3242 im->extra_flags |= NOMINOR;
3245 im->extra_flags |= ALTYGRID;
3248 im->extra_flags |= ALTAUTOSCALE;
3251 im->extra_flags |= ALTAUTOSCALE_MAX;
3254 im->extra_flags |= ONLY_GRAPH;
3257 im->extra_flags |= NOLEGEND;
3260 im->extra_flags |= FORCE_RULES_LEGEND;
3262 case LONGOPT_UNITS_SI:
3263 if(im->extra_flags & FORCE_UNITS) {
3264 rrd_set_error("--units can only be used once!");
3267 if(strcmp(optarg,"si")==0)
3268 im->extra_flags |= FORCE_UNITS_SI;
3270 rrd_set_error("invalid argument for --units: %s", optarg );
3275 im->unitsexponent = atoi(optarg);
3278 im->unitslength = atoi(optarg);
3281 im->tabwidth = atof(optarg);
3284 im->step = atoi(optarg);
3290 if ((parsetime_error = parsetime(optarg, &start_tv))) {
3291 rrd_set_error( "start time: %s", parsetime_error );
3296 if ((parsetime_error = parsetime(optarg, &end_tv))) {
3297 rrd_set_error( "end time: %s", parsetime_error );
3302 if(strcmp(optarg,"none") == 0){
3308 "%10[A-Z]:%ld:%10[A-Z]:%ld:%10[A-Z]:%ld:%ld:%n",
3310 &im->xlab_user.gridst,
3312 &im->xlab_user.mgridst,
3314 &im->xlab_user.labst,
3315 &im->xlab_user.precis,
3316 &stroff) == 7 && stroff != 0){
3317 strncpy(im->xlab_form, optarg+stroff, sizeof(im->xlab_form) - 1);
3318 im->xlab_form[sizeof(im->xlab_form)-1] = '\0';
3319 if((int)(im->xlab_user.gridtm = tmt_conv(scan_gtm)) == -1){
3320 rrd_set_error("unknown keyword %s",scan_gtm);
3322 } else if ((int)(im->xlab_user.mgridtm = tmt_conv(scan_mtm)) == -1){
3323 rrd_set_error("unknown keyword %s",scan_mtm);
3325 } else if ((int)(im->xlab_user.labtm = tmt_conv(scan_ltm)) == -1){
3326 rrd_set_error("unknown keyword %s",scan_ltm);
3329 im->xlab_user.minsec = 1;
3330 im->xlab_user.stst = im->xlab_form;
3332 rrd_set_error("invalid x-grid format");
3338 if(strcmp(optarg,"none") == 0){
3346 &im->ylabfact) == 2) {
3347 if(im->ygridstep<=0){
3348 rrd_set_error("grid step must be > 0");
3350 } else if (im->ylabfact < 1){
3351 rrd_set_error("label factor must be > 0");
3355 rrd_set_error("invalid y-grid format");
3360 strncpy(im->ylegend,optarg,150);
3361 im->ylegend[150]='\0';
3364 im->maxval = atof(optarg);
3367 im->minval = atof(optarg);
3370 im->base = atol(optarg);
3371 if(im->base != 1024 && im->base != 1000 ){
3372 rrd_set_error("the only sensible value for base apart from 1000 is 1024");
3377 long_tmp = atol(optarg);
3378 if (long_tmp < 10) {
3379 rrd_set_error("width below 10 pixels");
3382 im->xsize = long_tmp;
3385 long_tmp = atol(optarg);
3386 if (long_tmp < 10) {
3387 rrd_set_error("height below 10 pixels");
3390 im->ysize = long_tmp;
3393 im->canvas->interlaced = 1;
3399 im->imginfo = optarg;
3402 if((int)(im->canvas->imgformat = if_conv(optarg)) == -1) {
3403 rrd_set_error("unsupported graphics format '%s'",optarg);
3415 im->logarithmic = 1;
3419 "%10[A-Z]#%n%8lx%n",
3420 col_nam,&col_start,&color,&col_end) == 2){
3422 int col_len = col_end - col_start;
3426 ((color & 0xF00) * 0x110000) |
3427 ((color & 0x0F0) * 0x011000) |
3428 ((color & 0x00F) * 0x001100) |
3434 ((color & 0xF000) * 0x11000) |
3435 ((color & 0x0F00) * 0x01100) |
3436 ((color & 0x00F0) * 0x00110) |
3437 ((color & 0x000F) * 0x00011)
3441 color = (color << 8) + 0xff /* shift left by 8 */;
3446 rrd_set_error("the color format is #RRGGBB[AA]");
3449 if((ci=grc_conv(col_nam)) != -1){
3450 im->graph_col[ci]=color;
3452 rrd_set_error("invalid color name '%s'",col_nam);
3456 rrd_set_error("invalid color def format");
3463 char font[1024] = "";
3466 "%10[A-Z]:%lf:%1000s",
3467 prop,&size,font) >= 2){
3469 if((sindex=text_prop_conv(prop)) != -1){
3470 for (propidx=sindex;propidx<TEXT_PROP_LAST;propidx++){
3472 im->text_prop[propidx].size=size;
3474 if (strlen(font) > 0){
3475 strcpy(im->text_prop[propidx].font,font);
3477 if (propidx==sindex && sindex != 0) break;
3480 rrd_set_error("invalid fonttag '%s'",prop);
3484 rrd_set_error("invalid text property format");
3490 im->canvas->zoom = atof(optarg);
3491 if (im->canvas->zoom <= 0.0) {
3492 rrd_set_error("zoom factor must be > 0");
3497 strncpy(im->title,optarg,150);
3498 im->title[150]='\0';
3502 if ( strcmp( optarg, "normal" ) == 0 )
3503 im->canvas->aa_type = AA_NORMAL;
3504 else if ( strcmp( optarg, "light" ) == 0 )
3505 im->canvas->aa_type = AA_LIGHT;
3506 else if ( strcmp( optarg, "mono" ) == 0 )
3507 im->canvas->aa_type = AA_NONE;
3510 rrd_set_error("unknown font-render-mode '%s'", optarg );
3516 im->canvas->font_aa_threshold = atof(optarg);
3520 strncpy(im->watermark,optarg,100);
3521 im->watermark[99]='\0';
3526 rrd_set_error("unknown option '%c'", optopt);
3528 rrd_set_error("unknown option '%s'",argv[optind-1]);
3533 if (optind >= argc) {
3534 rrd_set_error("missing filename");
3538 if (im->logarithmic == 1 && im->minval <= 0){
3539 rrd_set_error("for a logarithmic yaxis you must specify a lower-limit > 0");
3543 if (proc_start_end(&start_tv,&end_tv,&start_tmp,&end_tmp) == -1){
3544 /* error string is set in parsetime.c */
3548 if (start_tmp < 3600*24*365*10){
3549 rrd_set_error("the first entry to fetch should be after 1980 (%ld)",start_tmp);
3553 if (end_tmp < start_tmp) {
3554 rrd_set_error("start (%ld) should be less than end (%ld)",
3555 start_tmp, end_tmp);
3559 im->start = start_tmp;
3561 im->step = max((long)im->step, (im->end-im->start)/im->xsize);
3565 rrd_graph_check_vname(image_desc_t *im, char *varname, char *err)
3567 if ((im->gdes[im->gdes_c-1].vidx=find_var(im,varname))==-1) {
3568 rrd_set_error("Unknown variable '%s' in %s",varname,err);
3574 rrd_graph_color(image_desc_t *im, char *var, char *err, int optional)
3577 graph_desc_t *gdp=&im->gdes[im->gdes_c-1];
3579 color=strstr(var,"#");
3582 rrd_set_error("Found no color in %s",err);
3591 rest=strstr(color,":");
3599 sscanf(color,"#%6lx%n",&col,&n);
3600 col = (col << 8) + 0xff /* shift left by 8 */;
3601 if (n!=7) rrd_set_error("Color problem in %s",err);
3604 sscanf(color,"#%8lx%n",&col,&n);
3607 rrd_set_error("Color problem in %s",err);
3609 if (rrd_test_error()) return 0;
3616 int bad_format(char *fmt) {
3620 while (*ptr != '\0')
3621 if (*ptr++ == '%') {
3623 /* line cannot end with percent char */
3624 if (*ptr == '\0') return 1;
3626 /* '%s', '%S' and '%%' are allowed */
3627 if (*ptr == 's' || *ptr == 'S' || *ptr == '%') ptr++;
3629 /* %c is allowed (but use only with vdef!) */
3630 else if (*ptr == 'c') {
3635 /* or else '% 6.2lf' and such are allowed */
3637 /* optional padding character */
3638 if (*ptr == ' ' || *ptr == '+' || *ptr == '-') ptr++;
3640 /* This should take care of 'm.n' with all three optional */
3641 while (*ptr >= '0' && *ptr <= '9') ptr++;
3642 if (*ptr == '.') ptr++;
3643 while (*ptr >= '0' && *ptr <= '9') ptr++;
3645 /* Either 'le', 'lf' or 'lg' must follow here */
3646 if (*ptr++ != 'l') return 1;
3647 if (*ptr == 'e' || *ptr == 'f' || *ptr == 'g') ptr++;
3658 vdef_parse(gdes,str)
3659 struct graph_desc_t *gdes;
3660 const char *const str;
3662 /* A VDEF currently is either "func" or "param,func"
3663 * so the parsing is rather simple. Change if needed.
3670 sscanf(str,"%le,%29[A-Z]%n",¶m,func,&n);
3671 if (n== (int)strlen(str)) { /* matched */
3675 sscanf(str,"%29[A-Z]%n",func,&n);
3676 if (n== (int)strlen(str)) { /* matched */
3679 rrd_set_error("Unknown function string '%s' in VDEF '%s'"
3686 if (!strcmp("PERCENT",func)) gdes->vf.op = VDEF_PERCENT;
3687 else if (!strcmp("MAXIMUM",func)) gdes->vf.op = VDEF_MAXIMUM;
3688 else if (!strcmp("AVERAGE",func)) gdes->vf.op = VDEF_AVERAGE;
3689 else if (!strcmp("MINIMUM",func)) gdes->vf.op = VDEF_MINIMUM;
3690 else if (!strcmp("TOTAL", func)) gdes->vf.op = VDEF_TOTAL;
3691 else if (!strcmp("FIRST", func)) gdes->vf.op = VDEF_FIRST;
3692 else if (!strcmp("LAST", func)) gdes->vf.op = VDEF_LAST;
3693 else if (!strcmp("LSLSLOPE", func)) gdes->vf.op = VDEF_LSLSLOPE;
3694 else if (!strcmp("LSLINT", func)) gdes->vf.op = VDEF_LSLINT;
3695 else if (!strcmp("LSLCORREL",func)) gdes->vf.op = VDEF_LSLCORREL;
3697 rrd_set_error("Unknown function '%s' in VDEF '%s'\n"
3704 switch (gdes->vf.op) {
3706 if (isnan(param)) { /* no parameter given */
3707 rrd_set_error("Function '%s' needs parameter in VDEF '%s'\n"
3713 if (param>=0.0 && param<=100.0) {
3714 gdes->vf.param = param;
3715 gdes->vf.val = DNAN; /* undefined */
3716 gdes->vf.when = 0; /* undefined */
3718 rrd_set_error("Parameter '%f' out of range in VDEF '%s'\n"
3733 case VDEF_LSLCORREL:
3735 gdes->vf.param = DNAN;
3736 gdes->vf.val = DNAN;
3739 rrd_set_error("Function '%s' needs no parameter in VDEF '%s'\n"
3756 graph_desc_t *src,*dst;
3760 dst = &im->gdes[gdi];
3761 src = &im->gdes[dst->vidx];
3762 data = src->data + src->ds;
3763 steps = (src->end - src->start) / src->step;
3766 printf("DEBUG: start == %lu, end == %lu, %lu steps\n"
3773 switch (dst->vf.op) {
3774 case VDEF_PERCENT: {
3775 rrd_value_t * array;
3779 if ((array = malloc(steps*sizeof(double)))==NULL) {
3780 rrd_set_error("malloc VDEV_PERCENT");
3783 for (step=0;step < steps; step++) {
3784 array[step]=data[step*src->ds_cnt];
3786 qsort(array,step,sizeof(double),vdef_percent_compar);
3788 field = (steps-1)*dst->vf.param/100;
3789 dst->vf.val = array[field];
3790 dst->vf.when = 0; /* no time component */
3793 for(step=0;step<steps;step++)
3794 printf("DEBUG: %3li:%10.2f %c\n",step,array[step],step==field?'*':' ');
3800 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3801 if (step == steps) {
3805 dst->vf.val = data[step*src->ds_cnt];
3806 dst->vf.when = src->start + (step+1)*src->step;
3808 while (step != steps) {
3809 if (finite(data[step*src->ds_cnt])) {
3810 if (data[step*src->ds_cnt] > dst->vf.val) {
3811 dst->vf.val = data[step*src->ds_cnt];
3812 dst->vf.when = src->start + (step+1)*src->step;
3819 case VDEF_AVERAGE: {
3822 for (step=0;step<steps;step++) {
3823 if (finite(data[step*src->ds_cnt])) {
3824 sum += data[step*src->ds_cnt];
3829 if (dst->vf.op == VDEF_TOTAL) {
3830 dst->vf.val = sum*src->step;
3831 dst->vf.when = 0; /* no time component */
3833 dst->vf.val = sum/cnt;
3834 dst->vf.when = 0; /* no time component */
3844 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3845 if (step == steps) {
3849 dst->vf.val = data[step*src->ds_cnt];
3850 dst->vf.when = src->start + (step+1)*src->step;
3852 while (step != steps) {
3853 if (finite(data[step*src->ds_cnt])) {
3854 if (data[step*src->ds_cnt] < dst->vf.val) {
3855 dst->vf.val = data[step*src->ds_cnt];
3856 dst->vf.when = src->start + (step+1)*src->step;
3863 /* The time value returned here is one step before the
3864 * actual time value. This is the start of the first
3868 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3869 if (step == steps) { /* all entries were NaN */
3873 dst->vf.val = data[step*src->ds_cnt];
3874 dst->vf.when = src->start + step*src->step;
3878 /* The time value returned here is the
3879 * actual time value. This is the end of the last
3883 while (step >= 0 && isnan(data[step*src->ds_cnt])) step--;
3884 if (step < 0) { /* all entries were NaN */
3888 dst->vf.val = data[step*src->ds_cnt];
3889 dst->vf.when = src->start + (step+1)*src->step;
3894 case VDEF_LSLCORREL:{
3895 /* Bestfit line by linear least squares method */
3898 double SUMx, SUMy, SUMxy, SUMxx, SUMyy, slope, y_intercept, correl ;
3899 SUMx = 0; SUMy = 0; SUMxy = 0; SUMxx = 0; SUMyy = 0;
3901 for (step=0;step<steps;step++) {
3902 if (finite(data[step*src->ds_cnt])) {
3905 SUMxx += step * step;
3906 SUMxy += step * data[step*src->ds_cnt];
3907 SUMy += data[step*src->ds_cnt];
3908 SUMyy += data[step*src->ds_cnt]*data[step*src->ds_cnt];
3912 slope = ( SUMx*SUMy - cnt*SUMxy ) / ( SUMx*SUMx - cnt*SUMxx );
3913 y_intercept = ( SUMy - slope*SUMx ) / cnt;
3914 correl = (SUMxy - (SUMx*SUMy)/cnt) / sqrt((SUMxx - (SUMx*SUMx)/cnt)*(SUMyy - (SUMy*SUMy)/cnt));
3917 if (dst->vf.op == VDEF_LSLSLOPE) {
3918 dst->vf.val = slope;
3920 } else if (dst->vf.op == VDEF_LSLINT) {
3921 dst->vf.val = y_intercept;
3923 } else if (dst->vf.op == VDEF_LSLCORREL) {
3924 dst->vf.val = correl;
3938 /* NaN < -INF < finite_values < INF */
3940 vdef_percent_compar(a,b)
3943 /* Equality is not returned; this doesn't hurt except
3944 * (maybe) for a little performance.
3947 /* First catch NaN values. They are smallest */
3948 if (isnan( *(double *)a )) return -1;
3949 if (isnan( *(double *)b )) return 1;
3951 /* NaN doesn't reach this part so INF and -INF are extremes.
3952 * The sign from isinf() is compatible with the sign we return
3954 if (isinf( *(double *)a )) return isinf( *(double *)a );
3955 if (isinf( *(double *)b )) return isinf( *(double *)b );
3957 /* If we reach this, both values must be finite */
3958 if ( *(double *)a < *(double *)b ) return -1; else return 1;