1 /****************************************************************************
2 * RRDtool 1.2.16 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' &&
1458 rrd_set_error("Unknown control code at the end of '%s\\%c'",im->gdes[i].legend,prt_fctn);
1462 /* remove exess space */
1463 while (prt_fctn=='g' &&
1465 im->gdes[i].legend[leg_cc-1]==' '){
1467 im->gdes[i].legend[leg_cc]='\0';
1470 legspace[i]=(prt_fctn=='g' ? 0 : interleg);
1473 /* no interleg space if string ends in \g */
1474 fill += legspace[i];
1476 fill += gfx_get_text_width(im->canvas, fill+border,
1477 im->text_prop[TEXT_PROP_LEGEND].font,
1478 im->text_prop[TEXT_PROP_LEGEND].size,
1480 im->gdes[i].legend, 0);
1485 /* who said there was a special tag ... ?*/
1486 if (prt_fctn=='g') {
1489 if (prt_fctn == '\0') {
1490 if (i == im->gdes_c -1 ) prt_fctn ='l';
1492 /* is it time to place the legends ? */
1493 if (fill > im->ximg - 2*border){
1508 if (prt_fctn != '\0'){
1510 if (leg_c >= 2 && prt_fctn == 'j') {
1511 glue = (im->ximg - fill - 2* border) / (leg_c-1);
1515 if (prt_fctn =='c') leg_x = (im->ximg - fill) / 2.0;
1516 if (prt_fctn =='r') leg_x = im->ximg - fill - border;
1518 for(ii=mark;ii<=i;ii++){
1519 if(im->gdes[ii].legend[0]=='\0')
1520 continue; /* skip empty legends */
1521 im->gdes[ii].leg_x = leg_x;
1522 im->gdes[ii].leg_y = leg_y;
1524 gfx_get_text_width(im->canvas, leg_x,
1525 im->text_prop[TEXT_PROP_LEGEND].font,
1526 im->text_prop[TEXT_PROP_LEGEND].size,
1528 im->gdes[ii].legend, 0)
1533 /* only add y space if there was text on the line */
1534 if (leg_x > border || prt_fctn == 's')
1535 leg_y += im->text_prop[TEXT_PROP_LEGEND].size*1.8;
1536 if (prt_fctn == 's')
1537 leg_y -= im->text_prop[TEXT_PROP_LEGEND].size;
1543 im->yimg = leg_y_prev;
1544 /* if we did place some legends we have to add vertical space */
1545 if (leg_y != im->yimg){
1546 im->yimg += im->text_prop[TEXT_PROP_LEGEND].size*1.8;
1553 /* create a grid on the graph. it determines what to do
1554 from the values of xsize, start and end */
1556 /* the xaxis labels are determined from the number of seconds per pixel
1557 in the requested graph */
1562 calc_horizontal_grid(image_desc_t *im)
1568 int decimals, fractionals;
1570 im->ygrid_scale.labfact=2;
1571 range = im->maxval - im->minval;
1572 scaledrange = range / im->magfact;
1574 /* does the scale of this graph make it impossible to put lines
1575 on it? If so, give up. */
1576 if (isnan(scaledrange)) {
1580 /* find grid spaceing */
1582 if(isnan(im->ygridstep)){
1583 if(im->extra_flags & ALTYGRID) {
1584 /* find the value with max number of digits. Get number of digits */
1585 decimals = ceil(log10(max(fabs(im->maxval), fabs(im->minval))*im->viewfactor/im->magfact));
1586 if(decimals <= 0) /* everything is small. make place for zero */
1589 im->ygrid_scale.gridstep = pow((double)10, floor(log10(range*im->viewfactor/im->magfact)))/im->viewfactor*im->magfact;
1591 if(im->ygrid_scale.gridstep == 0) /* range is one -> 0.1 is reasonable scale */
1592 im->ygrid_scale.gridstep = 0.1;
1593 /* should have at least 5 lines but no more then 15 */
1594 if(range/im->ygrid_scale.gridstep < 5)
1595 im->ygrid_scale.gridstep /= 10;
1596 if(range/im->ygrid_scale.gridstep > 15)
1597 im->ygrid_scale.gridstep *= 10;
1598 if(range/im->ygrid_scale.gridstep > 5) {
1599 im->ygrid_scale.labfact = 1;
1600 if(range/im->ygrid_scale.gridstep > 8)
1601 im->ygrid_scale.labfact = 2;
1604 im->ygrid_scale.gridstep /= 5;
1605 im->ygrid_scale.labfact = 5;
1607 fractionals = floor(log10(im->ygrid_scale.gridstep*(double)im->ygrid_scale.labfact*im->viewfactor/im->magfact));
1608 if(fractionals < 0) { /* small amplitude. */
1609 int len = decimals - fractionals + 1;
1610 if (im->unitslength < len+2) im->unitslength = len+2;
1611 sprintf(im->ygrid_scale.labfmt, "%%%d.%df%s", len, -fractionals,(im->symbol != ' ' ? " %c" : ""));
1613 int len = decimals + 1;
1614 if (im->unitslength < len+2) im->unitslength = len+2;
1615 sprintf(im->ygrid_scale.labfmt, "%%%d.0f%s", len, ( im->symbol != ' ' ? " %c" : "" ));
1619 for(i=0;ylab[i].grid > 0;i++){
1620 pixel = im->ysize / (scaledrange / ylab[i].grid);
1627 if (pixel * ylab[gridind].lfac[i] >= 2.5 * im->text_prop[TEXT_PROP_AXIS].size) {
1628 im->ygrid_scale.labfact = ylab[gridind].lfac[i];
1633 im->ygrid_scale.gridstep = ylab[gridind].grid * im->magfact;
1636 im->ygrid_scale.gridstep = im->ygridstep;
1637 im->ygrid_scale.labfact = im->ylabfact;
1642 int draw_horizontal_grid(image_desc_t *im)
1646 char graph_label[100];
1648 double X0=im->xorigin;
1649 double X1=im->xorigin+im->xsize;
1651 int sgrid = (int)( im->minval / im->ygrid_scale.gridstep - 1);
1652 int egrid = (int)( im->maxval / im->ygrid_scale.gridstep + 1);
1654 scaledstep = im->ygrid_scale.gridstep/(double)im->magfact*(double)im->viewfactor;
1655 MaxY = scaledstep*(double)egrid;
1656 for (i = sgrid; i <= egrid; i++){
1657 double Y0=ytr(im,im->ygrid_scale.gridstep*i);
1658 double YN=ytr(im,im->ygrid_scale.gridstep*(i+1));
1659 if ( Y0 >= im->yorigin-im->ysize
1660 && Y0 <= im->yorigin){
1661 /* Make sure at least 2 grid labels are shown, even if it doesn't agree
1662 with the chosen settings. Add a label if required by settings, or if
1663 there is only one label so far and the next grid line is out of bounds. */
1664 if(i % im->ygrid_scale.labfact == 0 || ( nlabels==1 && (YN < im->yorigin-im->ysize || YN > im->yorigin) )){
1665 if (im->symbol == ' ') {
1666 if(im->extra_flags & ALTYGRID) {
1667 sprintf(graph_label,im->ygrid_scale.labfmt,scaledstep*(double)i);
1670 sprintf(graph_label,"%4.1f",scaledstep*(double)i);
1672 sprintf(graph_label,"%4.0f",scaledstep*(double)i);
1676 char sisym = ( i == 0 ? ' ' : im->symbol);
1677 if(im->extra_flags & ALTYGRID) {
1678 sprintf(graph_label,im->ygrid_scale.labfmt,scaledstep*(double)i,sisym);
1681 sprintf(graph_label,"%4.1f %c",scaledstep*(double)i, sisym);
1683 sprintf(graph_label,"%4.0f %c",scaledstep*(double)i, sisym);
1689 gfx_new_text ( im->canvas,
1690 X0-im->text_prop[TEXT_PROP_AXIS].size, Y0,
1691 im->graph_col[GRC_FONT],
1692 im->text_prop[TEXT_PROP_AXIS].font,
1693 im->text_prop[TEXT_PROP_AXIS].size,
1694 im->tabwidth, 0.0, GFX_H_RIGHT, GFX_V_CENTER,
1696 gfx_new_dashed_line ( im->canvas,
1699 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1700 im->grid_dash_on, im->grid_dash_off);
1702 } else if (!(im->extra_flags & NOMINOR)) {
1703 gfx_new_dashed_line ( im->canvas,
1706 GRIDWIDTH, im->graph_col[GRC_GRID],
1707 im->grid_dash_on, im->grid_dash_off);
1715 /* this is frexp for base 10 */
1716 double frexp10(double, double *);
1717 double frexp10(double x, double *e) {
1721 iexp = floor(log(fabs(x)) / log(10));
1722 mnt = x / pow(10.0, iexp);
1725 mnt = x / pow(10.0, iexp);
1731 static int AlmostEqual2sComplement (float A, float B, int maxUlps)
1734 int aInt = *(int*)&A;
1735 int bInt = *(int*)&B;
1737 /* Make sure maxUlps is non-negative and small enough that the
1738 default NAN won't compare as equal to anything. */
1740 /* assert(maxUlps > 0 && maxUlps < 4 * 1024 * 1024); */
1742 /* Make aInt lexicographically ordered as a twos-complement int */
1745 aInt = 0x80000000l - aInt;
1747 /* Make bInt lexicographically ordered as a twos-complement int */
1750 bInt = 0x80000000l - bInt;
1752 intDiff = abs(aInt - bInt);
1754 if (intDiff <= maxUlps)
1760 /* logaritmic horizontal grid */
1762 horizontal_log_grid(image_desc_t *im)
1764 double yloglab[][10] = {
1765 {1.0, 10., 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0},
1766 {1.0, 5.0, 10., 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0},
1767 {1.0, 2.0, 5.0, 7.0, 10., 0.0, 0.0, 0.0, 0.0, 0.0},
1768 {1.0, 2.0, 4.0, 6.0, 8.0, 10., 0.0, 0.0, 0.0, 0.0},
1769 {1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.},
1770 {0,0,0,0,0, 0,0,0,0,0} /* last line */ };
1772 int i, j, val_exp, min_exp;
1773 double nex; /* number of decades in data */
1774 double logscale; /* scale in logarithmic space */
1775 int exfrac = 1; /* decade spacing */
1776 int mid = -1; /* row in yloglab for major grid */
1777 double mspac; /* smallest major grid spacing (pixels) */
1778 int flab; /* first value in yloglab to use */
1779 double value, tmp, pre_value;
1781 char graph_label[100];
1783 nex = log10(im->maxval / im->minval);
1784 logscale = im->ysize / nex;
1786 /* major spacing for data with high dynamic range */
1787 while(logscale * exfrac < 3 * im->text_prop[TEXT_PROP_LEGEND].size) {
1788 if(exfrac == 1) exfrac = 3;
1792 /* major spacing for less dynamic data */
1794 /* search best row in yloglab */
1796 for(i = 0; yloglab[mid][i + 1] < 10.0; i++);
1797 mspac = logscale * log10(10.0 / yloglab[mid][i]);
1798 } while(mspac > 2 * im->text_prop[TEXT_PROP_LEGEND].size && yloglab[mid][0] > 0);
1801 /* find first value in yloglab */
1802 for(flab = 0; yloglab[mid][flab] < 10 && frexp10(im->minval, &tmp) > yloglab[mid][flab] ; flab++);
1803 if(yloglab[mid][flab] == 10.0) {
1808 if(val_exp % exfrac) val_exp += abs(-val_exp % exfrac);
1811 X1=im->xorigin+im->xsize;
1817 value = yloglab[mid][flab] * pow(10.0, val_exp);
1818 if ( AlmostEqual2sComplement(value,pre_value,4) ) break; /* it seems we are not converging */
1822 Y0 = ytr(im, value);
1823 if(Y0 <= im->yorigin - im->ysize) break;
1825 /* major grid line */
1826 gfx_new_dashed_line ( im->canvas,
1829 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1830 im->grid_dash_on, im->grid_dash_off);
1833 if (im->extra_flags & FORCE_UNITS_SI) {
1838 scale = floor(val_exp / 3.0);
1839 if( value >= 1.0 ) pvalue = pow(10.0, val_exp % 3);
1840 else pvalue = pow(10.0, ((val_exp + 1) % 3) + 2);
1841 pvalue *= yloglab[mid][flab];
1843 if ( ((scale+si_symbcenter) < (int)sizeof(si_symbol)) &&
1844 ((scale+si_symbcenter) >= 0) )
1845 symbol = si_symbol[scale+si_symbcenter];
1849 sprintf(graph_label,"%3.0f %c", pvalue, symbol);
1851 sprintf(graph_label,"%3.0e", value);
1852 gfx_new_text ( im->canvas,
1853 X0-im->text_prop[TEXT_PROP_AXIS].size, Y0,
1854 im->graph_col[GRC_FONT],
1855 im->text_prop[TEXT_PROP_AXIS].font,
1856 im->text_prop[TEXT_PROP_AXIS].size,
1857 im->tabwidth,0.0, GFX_H_RIGHT, GFX_V_CENTER,
1861 if(mid < 4 && exfrac == 1) {
1862 /* find first and last minor line behind current major line
1863 * i is the first line and j tha last */
1865 min_exp = val_exp - 1;
1866 for(i = 1; yloglab[mid][i] < 10.0; i++);
1867 i = yloglab[mid][i - 1] + 1;
1872 i = yloglab[mid][flab - 1] + 1;
1873 j = yloglab[mid][flab];
1876 /* draw minor lines below current major line */
1879 value = i * pow(10.0, min_exp);
1880 if(value < im->minval) continue;
1882 Y0 = ytr(im, value);
1883 if(Y0 <= im->yorigin - im->ysize) break;
1886 gfx_new_dashed_line ( im->canvas,
1889 GRIDWIDTH, im->graph_col[GRC_GRID],
1890 im->grid_dash_on, im->grid_dash_off);
1893 else if(exfrac > 1) {
1894 for(i = val_exp - exfrac / 3 * 2; i < val_exp; i += exfrac / 3) {
1895 value = pow(10.0, i);
1896 if(value < im->minval) continue;
1898 Y0 = ytr(im, value);
1899 if(Y0 <= im->yorigin - im->ysize) break;
1902 gfx_new_dashed_line ( im->canvas,
1905 GRIDWIDTH, im->graph_col[GRC_GRID],
1906 im->grid_dash_on, im->grid_dash_off);
1911 if(yloglab[mid][++flab] == 10.0) {
1917 /* draw minor lines after highest major line */
1918 if(mid < 4 && exfrac == 1) {
1919 /* find first and last minor line below current major line
1920 * i is the first line and j tha last */
1922 min_exp = val_exp - 1;
1923 for(i = 1; yloglab[mid][i] < 10.0; i++);
1924 i = yloglab[mid][i - 1] + 1;
1929 i = yloglab[mid][flab - 1] + 1;
1930 j = yloglab[mid][flab];
1933 /* draw minor lines below current major line */
1936 value = i * pow(10.0, min_exp);
1937 if(value < im->minval) continue;
1939 Y0 = ytr(im, value);
1940 if(Y0 <= im->yorigin - im->ysize) break;
1943 gfx_new_dashed_line ( im->canvas,
1946 GRIDWIDTH, im->graph_col[GRC_GRID],
1947 im->grid_dash_on, im->grid_dash_off);
1950 /* fancy minor gridlines */
1951 else if(exfrac > 1) {
1952 for(i = val_exp - exfrac / 3 * 2; i < val_exp; i += exfrac / 3) {
1953 value = pow(10.0, i);
1954 if(value < im->minval) continue;
1956 Y0 = ytr(im, value);
1957 if(Y0 <= im->yorigin - im->ysize) break;
1960 gfx_new_dashed_line ( im->canvas,
1963 GRIDWIDTH, im->graph_col[GRC_GRID],
1964 im->grid_dash_on, im->grid_dash_off);
1976 int xlab_sel; /* which sort of label and grid ? */
1977 time_t ti, tilab, timajor;
1979 char graph_label[100];
1980 double X0,Y0,Y1; /* points for filled graph and more*/
1983 /* the type of time grid is determined by finding
1984 the number of seconds per pixel in the graph */
1987 if(im->xlab_user.minsec == -1){
1988 factor=(im->end - im->start)/im->xsize;
1990 while ( xlab[xlab_sel+1].minsec != -1
1991 && xlab[xlab_sel+1].minsec <= factor) { xlab_sel++; } /* pick the last one */
1992 while ( xlab[xlab_sel-1].minsec == xlab[xlab_sel].minsec
1993 && xlab[xlab_sel].length > (im->end - im->start)) { xlab_sel--; } /* go back to the smallest size */
1994 im->xlab_user.gridtm = xlab[xlab_sel].gridtm;
1995 im->xlab_user.gridst = xlab[xlab_sel].gridst;
1996 im->xlab_user.mgridtm = xlab[xlab_sel].mgridtm;
1997 im->xlab_user.mgridst = xlab[xlab_sel].mgridst;
1998 im->xlab_user.labtm = xlab[xlab_sel].labtm;
1999 im->xlab_user.labst = xlab[xlab_sel].labst;
2000 im->xlab_user.precis = xlab[xlab_sel].precis;
2001 im->xlab_user.stst = xlab[xlab_sel].stst;
2004 /* y coords are the same for every line ... */
2006 Y1 = im->yorigin-im->ysize;
2009 /* paint the minor grid */
2010 if (!(im->extra_flags & NOMINOR))
2012 for(ti = find_first_time(im->start,
2013 im->xlab_user.gridtm,
2014 im->xlab_user.gridst),
2015 timajor = find_first_time(im->start,
2016 im->xlab_user.mgridtm,
2017 im->xlab_user.mgridst);
2019 ti = find_next_time(ti,im->xlab_user.gridtm,im->xlab_user.gridst)
2021 /* are we inside the graph ? */
2022 if (ti < im->start || ti > im->end) continue;
2023 while (timajor < ti) {
2024 timajor = find_next_time(timajor,
2025 im->xlab_user.mgridtm, im->xlab_user.mgridst);
2027 if (ti == timajor) continue; /* skip as falls on major grid line */
2029 gfx_new_dashed_line(im->canvas,X0,Y0+1, X0,Y1-1,GRIDWIDTH,
2030 im->graph_col[GRC_GRID],
2031 im->grid_dash_on, im->grid_dash_off);
2036 /* paint the major grid */
2037 for(ti = find_first_time(im->start,
2038 im->xlab_user.mgridtm,
2039 im->xlab_user.mgridst);
2041 ti = find_next_time(ti,im->xlab_user.mgridtm,im->xlab_user.mgridst)
2043 /* are we inside the graph ? */
2044 if (ti < im->start || ti > im->end) continue;
2046 gfx_new_dashed_line(im->canvas,X0,Y0+3, X0,Y1-2,MGRIDWIDTH,
2047 im->graph_col[GRC_MGRID],
2048 im->grid_dash_on, im->grid_dash_off);
2051 /* paint the labels below the graph */
2052 for(ti = find_first_time(im->start - im->xlab_user.precis/2,
2053 im->xlab_user.labtm,
2054 im->xlab_user.labst);
2055 ti <= im->end - im->xlab_user.precis/2;
2056 ti = find_next_time(ti,im->xlab_user.labtm,im->xlab_user.labst)
2058 tilab= ti + im->xlab_user.precis/2; /* correct time for the label */
2059 /* are we inside the graph ? */
2060 if (tilab < im->start || tilab > im->end) continue;
2063 localtime_r(&tilab, &tm);
2064 strftime(graph_label,99,im->xlab_user.stst, &tm);
2066 # error "your libc has no strftime I guess we'll abort the exercise here."
2068 gfx_new_text ( im->canvas,
2069 xtr(im,tilab), Y0+im->text_prop[TEXT_PROP_AXIS].size*1.4+5,
2070 im->graph_col[GRC_FONT],
2071 im->text_prop[TEXT_PROP_AXIS].font,
2072 im->text_prop[TEXT_PROP_AXIS].size,
2073 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_BOTTOM,
2086 /* draw x and y axis */
2087 /* gfx_new_line ( im->canvas, im->xorigin+im->xsize,im->yorigin,
2088 im->xorigin+im->xsize,im->yorigin-im->ysize,
2089 GRIDWIDTH, im->graph_col[GRC_AXIS]);
2091 gfx_new_line ( im->canvas, im->xorigin,im->yorigin-im->ysize,
2092 im->xorigin+im->xsize,im->yorigin-im->ysize,
2093 GRIDWIDTH, im->graph_col[GRC_AXIS]); */
2095 gfx_new_line ( im->canvas, im->xorigin-4,im->yorigin,
2096 im->xorigin+im->xsize+4,im->yorigin,
2097 MGRIDWIDTH, im->graph_col[GRC_AXIS]);
2099 gfx_new_line ( im->canvas, im->xorigin,im->yorigin+4,
2100 im->xorigin,im->yorigin-im->ysize-4,
2101 MGRIDWIDTH, im->graph_col[GRC_AXIS]);
2104 /* arrow for X and Y axis direction */
2105 gfx_new_area ( im->canvas,
2106 im->xorigin+im->xsize+2, im->yorigin-2,
2107 im->xorigin+im->xsize+2, im->yorigin+3,
2108 im->xorigin+im->xsize+7, im->yorigin+0.5, /* LINEOFFSET */
2109 im->graph_col[GRC_ARROW]);
2111 gfx_new_area ( im->canvas,
2112 im->xorigin-2, im->yorigin-im->ysize-2,
2113 im->xorigin+3, im->yorigin-im->ysize-2,
2114 im->xorigin+0.5, im->yorigin-im->ysize-7, /* LINEOFFSET */
2115 im->graph_col[GRC_ARROW]);
2120 grid_paint(image_desc_t *im)
2124 double X0,Y0; /* points for filled graph and more*/
2127 /* draw 3d border */
2128 node = gfx_new_area (im->canvas, 0,im->yimg,
2130 2,2,im->graph_col[GRC_SHADEA]);
2131 gfx_add_point( node , im->ximg - 2, 2 );
2132 gfx_add_point( node , im->ximg, 0 );
2133 gfx_add_point( node , 0,0 );
2134 /* gfx_add_point( node , 0,im->yimg ); */
2136 node = gfx_new_area (im->canvas, 2,im->yimg-2,
2137 im->ximg-2,im->yimg-2,
2139 im->graph_col[GRC_SHADEB]);
2140 gfx_add_point( node , im->ximg,0);
2141 gfx_add_point( node , im->ximg,im->yimg);
2142 gfx_add_point( node , 0,im->yimg);
2143 /* gfx_add_point( node , 0,im->yimg ); */
2146 if (im->draw_x_grid == 1 )
2149 if (im->draw_y_grid == 1){
2150 if(im->logarithmic){
2151 res = horizontal_log_grid(im);
2153 res = draw_horizontal_grid(im);
2156 /* dont draw horizontal grid if there is no min and max val */
2158 char *nodata = "No Data found";
2159 gfx_new_text(im->canvas,im->ximg/2, (2*im->yorigin-im->ysize) / 2,
2160 im->graph_col[GRC_FONT],
2161 im->text_prop[TEXT_PROP_AXIS].font,
2162 im->text_prop[TEXT_PROP_AXIS].size,
2163 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_CENTER,
2168 /* yaxis unit description */
2169 gfx_new_text( im->canvas,
2170 10, (im->yorigin - im->ysize/2),
2171 im->graph_col[GRC_FONT],
2172 im->text_prop[TEXT_PROP_UNIT].font,
2173 im->text_prop[TEXT_PROP_UNIT].size, im->tabwidth,
2174 RRDGRAPH_YLEGEND_ANGLE,
2175 GFX_H_LEFT, GFX_V_CENTER,
2179 gfx_new_text( im->canvas,
2180 im->ximg/2, im->text_prop[TEXT_PROP_TITLE].size*1.3+4,
2181 im->graph_col[GRC_FONT],
2182 im->text_prop[TEXT_PROP_TITLE].font,
2183 im->text_prop[TEXT_PROP_TITLE].size, im->tabwidth, 0.0,
2184 GFX_H_CENTER, GFX_V_CENTER,
2186 /* rrdtool 'logo' */
2187 gfx_new_text( im->canvas,
2189 ( im->graph_col[GRC_FONT] & 0xffffff00 ) | 0x00000044,
2190 im->text_prop[TEXT_PROP_AXIS].font,
2191 5.5, im->tabwidth, 270,
2192 GFX_H_RIGHT, GFX_V_TOP,
2193 "RRDTOOL / TOBI OETIKER");
2195 /* graph watermark */
2196 if(im->watermark[0] != '\0') {
2197 gfx_new_text( im->canvas,
2198 im->ximg/2, im->yimg-6,
2199 ( im->graph_col[GRC_FONT] & 0xffffff00 ) | 0x00000044,
2200 im->text_prop[TEXT_PROP_AXIS].font,
2201 5.5, im->tabwidth, 0,
2202 GFX_H_CENTER, GFX_V_BOTTOM,
2207 if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
2208 for(i=0;i<im->gdes_c;i++){
2209 if(im->gdes[i].legend[0] =='\0')
2212 /* im->gdes[i].leg_y is the bottom of the legend */
2213 X0 = im->gdes[i].leg_x;
2214 Y0 = im->gdes[i].leg_y;
2215 gfx_new_text ( im->canvas, X0, Y0,
2216 im->graph_col[GRC_FONT],
2217 im->text_prop[TEXT_PROP_LEGEND].font,
2218 im->text_prop[TEXT_PROP_LEGEND].size,
2219 im->tabwidth,0.0, GFX_H_LEFT, GFX_V_BOTTOM,
2220 im->gdes[i].legend );
2221 /* The legend for GRAPH items starts with "M " to have
2222 enough space for the box */
2223 if ( im->gdes[i].gf != GF_PRINT &&
2224 im->gdes[i].gf != GF_GPRINT &&
2225 im->gdes[i].gf != GF_COMMENT) {
2228 boxH = gfx_get_text_width(im->canvas, 0,
2229 im->text_prop[TEXT_PROP_LEGEND].font,
2230 im->text_prop[TEXT_PROP_LEGEND].size,
2231 im->tabwidth,"o", 0) * 1.2;
2234 /* make sure transparent colors show up the same way as in the graph */
2235 node = gfx_new_area(im->canvas,
2239 im->graph_col[GRC_BACK]);
2240 gfx_add_point ( node, X0+boxH, Y0-boxV );
2242 node = gfx_new_area(im->canvas,
2247 gfx_add_point ( node, X0+boxH, Y0-boxV );
2248 node = gfx_new_line(im->canvas,
2251 1.0,im->graph_col[GRC_FRAME]);
2252 gfx_add_point(node,X0+boxH,Y0);
2253 gfx_add_point(node,X0+boxH,Y0-boxV);
2254 gfx_close_path(node);
2261 /*****************************************************
2262 * lazy check make sure we rely need to create this graph
2263 *****************************************************/
2265 int lazy_check(image_desc_t *im){
2268 struct stat imgstat;
2270 if (im->lazy == 0) return 0; /* no lazy option */
2271 if (stat(im->graphfile,&imgstat) != 0)
2272 return 0; /* can't stat */
2273 /* one pixel in the existing graph is more then what we would
2275 if (time(NULL) - imgstat.st_mtime >
2276 (im->end - im->start) / im->xsize)
2278 if ((fd = fopen(im->graphfile,"rb")) == NULL)
2279 return 0; /* the file does not exist */
2280 switch (im->canvas->imgformat) {
2282 size = PngSize(fd,&(im->ximg),&(im->yimg));
2291 #ifdef WITH_PIECHART
2293 pie_part(image_desc_t *im, gfx_color_t color,
2294 double PieCenterX, double PieCenterY, double Radius,
2295 double startangle, double endangle)
2299 double step=M_PI/50; /* Number of iterations for the circle;
2300 ** 10 is definitely too low, more than
2301 ** 50 seems to be overkill
2304 /* Strange but true: we have to work clockwise or else
2305 ** anti aliasing nor transparency don't work.
2307 ** This test is here to make sure we do it right, also
2308 ** this makes the for...next loop more easy to implement.
2309 ** The return will occur if the user enters a negative number
2310 ** (which shouldn't be done according to the specs) or if the
2311 ** programmers do something wrong (which, as we all know, never
2312 ** happens anyway :)
2314 if (endangle<startangle) return;
2316 /* Hidden feature: Radius decreases each full circle */
2318 while (angle>=2*M_PI) {
2323 node=gfx_new_area(im->canvas,
2324 PieCenterX+sin(startangle)*Radius,
2325 PieCenterY-cos(startangle)*Radius,
2328 PieCenterX+sin(endangle)*Radius,
2329 PieCenterY-cos(endangle)*Radius,
2331 for (angle=endangle;angle-startangle>=step;angle-=step) {
2333 PieCenterX+sin(angle)*Radius,
2334 PieCenterY-cos(angle)*Radius );
2341 graph_size_location(image_desc_t *im, int elements
2343 #ifdef WITH_PIECHART
2349 /* The actual size of the image to draw is determined from
2350 ** several sources. The size given on the command line is
2351 ** the graph area but we need more as we have to draw labels
2352 ** and other things outside the graph area
2355 /* +-+-------------------------------------------+
2356 ** |l|.................title.....................|
2357 ** |e+--+-------------------------------+--------+
2360 ** |l| l| main graph area | chart |
2363 ** |r+--+-------------------------------+--------+
2364 ** |e| | x-axis labels | |
2365 ** |v+--+-------------------------------+--------+
2366 ** | |..............legends......................|
2367 ** +-+-------------------------------------------+
2369 ** +---------------------------------------------+
2375 #ifdef WITH_PIECHART
2380 Xlegend =0, Ylegend =0,
2382 Xspacing =15, Yspacing =15,
2386 if (im->extra_flags & ONLY_GRAPH) {
2388 im->ximg = im->xsize;
2389 im->yimg = im->ysize;
2390 im->yorigin = im->ysize;
2395 if (im->ylegend[0] != '\0' ) {
2396 Xvertical = im->text_prop[TEXT_PROP_UNIT].size *2;
2400 if (im->title[0] != '\0') {
2401 /* The title is placed "inbetween" two text lines so it
2402 ** automatically has some vertical spacing. The horizontal
2403 ** spacing is added here, on each side.
2405 /* don't care for the with of the title
2406 Xtitle = gfx_get_text_width(im->canvas, 0,
2407 im->text_prop[TEXT_PROP_TITLE].font,
2408 im->text_prop[TEXT_PROP_TITLE].size,
2410 im->title, 0) + 2*Xspacing; */
2411 Ytitle = im->text_prop[TEXT_PROP_TITLE].size*2.6+10;
2417 if (im->draw_x_grid) {
2418 Yxlabel=im->text_prop[TEXT_PROP_AXIS].size *2.5;
2420 if (im->draw_y_grid) {
2421 Xylabel=gfx_get_text_width(im->canvas, 0,
2422 im->text_prop[TEXT_PROP_AXIS].font,
2423 im->text_prop[TEXT_PROP_AXIS].size,
2425 "0", 0) * im->unitslength;
2429 #ifdef WITH_PIECHART
2431 im->piesize=im->xsize<im->ysize?im->xsize:im->ysize;
2437 /* Now calculate the total size. Insert some spacing where
2438 desired. im->xorigin and im->yorigin need to correspond
2439 with the lower left corner of the main graph area or, if
2440 this one is not set, the imaginary box surrounding the
2443 /* The legend width cannot yet be determined, as a result we
2444 ** have problems adjusting the image to it. For now, we just
2445 ** forget about it at all; the legend will have to fit in the
2446 ** size already allocated.
2448 im->ximg = Xylabel + Xmain + 2 * Xspacing;
2450 #ifdef WITH_PIECHART
2454 if (Xmain) im->ximg += Xspacing;
2455 #ifdef WITH_PIECHART
2456 if (Xpie) im->ximg += Xspacing;
2459 im->xorigin = Xspacing + Xylabel;
2461 /* the length of the title should not influence with width of the graph
2462 if (Xtitle > im->ximg) im->ximg = Xtitle; */
2464 if (Xvertical) { /* unit description */
2465 im->ximg += Xvertical;
2466 im->xorigin += Xvertical;
2470 /* The vertical size is interesting... we need to compare
2471 ** the sum of {Ytitle, Ymain, Yxlabel, Ylegend, Ywatermark} with
2472 ** Yvertical however we need to know {Ytitle+Ymain+Yxlabel}
2473 ** in order to start even thinking about Ylegend or Ywatermark.
2475 ** Do it in three portions: First calculate the inner part,
2476 ** then do the legend, then adjust the total height of the img,
2477 ** adding space for a watermark if one exists;
2480 /* reserve space for main and/or pie */
2482 im->yimg = Ymain + Yxlabel;
2484 #ifdef WITH_PIECHART
2485 if (im->yimg < Ypie) im->yimg = Ypie;
2488 im->yorigin = im->yimg - Yxlabel;
2490 /* reserve space for the title *or* some padding above the graph */
2493 im->yorigin += Ytitle;
2495 im->yimg += 1.5*Yspacing;
2496 im->yorigin += 1.5*Yspacing;
2498 /* reserve space for padding below the graph */
2499 im->yimg += Yspacing;
2501 /* Determine where to place the legends onto the image.
2502 ** Adjust im->yimg to match the space requirements.
2504 if(leg_place(im)==-1)
2507 if (im->watermark[0] != '\0') {
2508 im->yimg += Ywatermark;
2512 if (Xlegend > im->ximg) {
2514 /* reposition Pie */
2518 #ifdef WITH_PIECHART
2519 /* The pie is placed in the upper right hand corner,
2520 ** just below the title (if any) and with sufficient
2524 im->pie_x = im->ximg - Xspacing - Xpie/2;
2525 im->pie_y = im->yorigin-Ymain+Ypie/2;
2527 im->pie_x = im->ximg/2;
2528 im->pie_y = im->yorigin-Ypie/2;
2536 /* from http://www.cygnus-software.com/papers/comparingfloats/comparingfloats.htm */
2537 /* yes we are loosing precision by doing tos with floats instead of doubles
2538 but it seems more stable this way. */
2541 /* draw that picture thing ... */
2543 graph_paint(image_desc_t *im, char ***calcpr)
2546 int lazy = lazy_check(im);
2547 #ifdef WITH_PIECHART
2549 double PieStart=0.0;
2554 double areazero = 0.0;
2555 graph_desc_t *lastgdes = NULL;
2557 /* if we are lazy and there is nothing to PRINT ... quit now */
2558 if (lazy && im->prt_c==0) return 0;
2560 /* pull the data from the rrd files ... */
2562 if(data_fetch(im)==-1)
2565 /* evaluate VDEF and CDEF operations ... */
2566 if(data_calc(im)==-1)
2569 #ifdef WITH_PIECHART
2570 /* check if we need to draw a piechart */
2571 for(i=0;i<im->gdes_c;i++){
2572 if (im->gdes[i].gf == GF_PART) {
2579 /* calculate and PRINT and GPRINT definitions. We have to do it at
2580 * this point because it will affect the length of the legends
2581 * if there are no graph elements we stop here ...
2582 * if we are lazy, try to quit ...
2584 i=print_calc(im,calcpr);
2587 #ifdef WITH_PIECHART
2590 ) || lazy) return 0;
2592 #ifdef WITH_PIECHART
2593 /* If there's only the pie chart to draw, signal this */
2594 if (i==0) piechart=2;
2597 /* get actual drawing data and find min and max values*/
2598 if(data_proc(im)==-1)
2601 if(!im->logarithmic){si_unit(im);} /* identify si magnitude Kilo, Mega Giga ? */
2603 if(!im->rigid && ! im->logarithmic)
2604 expand_range(im); /* make sure the upper and lower limit are
2607 if (!calc_horizontal_grid(im))
2614 /**************************************************************
2615 *** Calculating sizes and locations became a bit confusing ***
2616 *** so I moved this into a separate function. ***
2617 **************************************************************/
2618 if(graph_size_location(im,i
2619 #ifdef WITH_PIECHART
2625 /* the actual graph is created by going through the individual
2626 graph elements and then drawing them */
2628 node=gfx_new_area ( im->canvas,
2632 im->graph_col[GRC_BACK]);
2634 gfx_add_point(node,im->ximg, 0);
2636 #ifdef WITH_PIECHART
2637 if (piechart != 2) {
2639 node=gfx_new_area ( im->canvas,
2640 im->xorigin, im->yorigin,
2641 im->xorigin + im->xsize, im->yorigin,
2642 im->xorigin + im->xsize, im->yorigin-im->ysize,
2643 im->graph_col[GRC_CANVAS]);
2645 gfx_add_point(node,im->xorigin, im->yorigin - im->ysize);
2647 if (im->minval > 0.0)
2648 areazero = im->minval;
2649 if (im->maxval < 0.0)
2650 areazero = im->maxval;
2651 #ifdef WITH_PIECHART
2655 #ifdef WITH_PIECHART
2657 pie_part(im,im->graph_col[GRC_CANVAS],im->pie_x,im->pie_y,im->piesize*0.5,0,2*M_PI);
2661 for(i=0;i<im->gdes_c;i++){
2662 switch(im->gdes[i].gf){
2675 for (ii = 0; ii < im->xsize; ii++)
2677 if (!isnan(im->gdes[i].p_data[ii]) &&
2678 im->gdes[i].p_data[ii] != 0.0)
2680 if (im -> gdes[i].yrule > 0 ) {
2681 gfx_new_line(im->canvas,
2682 im -> xorigin + ii, im->yorigin,
2683 im -> xorigin + ii, im->yorigin - im -> gdes[i].yrule * im -> ysize,
2685 im -> gdes[i].col );
2686 } else if ( im -> gdes[i].yrule < 0 ) {
2687 gfx_new_line(im->canvas,
2688 im -> xorigin + ii, im->yorigin - im -> ysize,
2689 im -> xorigin + ii, im->yorigin - ( 1 - im -> gdes[i].yrule ) * im -> ysize,
2691 im -> gdes[i].col );
2699 /* fix data points at oo and -oo */
2700 for(ii=0;ii<im->xsize;ii++){
2701 if (isinf(im->gdes[i].p_data[ii])){
2702 if (im->gdes[i].p_data[ii] > 0) {
2703 im->gdes[i].p_data[ii] = im->maxval ;
2705 im->gdes[i].p_data[ii] = im->minval ;
2711 /* *******************************************************
2716 -------|--t-1--t--------------------------------
2718 if we know the value at time t was a then
2719 we draw a square from t-1 to t with the value a.
2721 ********************************************************* */
2722 if (im->gdes[i].col != 0x0){
2723 /* GF_LINE and friend */
2724 if(im->gdes[i].gf == GF_LINE ){
2727 for(ii=1;ii<im->xsize;ii++){
2728 if (isnan(im->gdes[i].p_data[ii]) || (im->slopemode==1 && isnan(im->gdes[i].p_data[ii-1]))){
2732 if ( node == NULL ) {
2733 last_y = ytr(im,im->gdes[i].p_data[ii]);
2734 if ( im->slopemode == 0 ){
2735 node = gfx_new_line(im->canvas,
2736 ii-1+im->xorigin,last_y,
2737 ii+im->xorigin,last_y,
2738 im->gdes[i].linewidth,
2741 node = gfx_new_line(im->canvas,
2742 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii-1]),
2743 ii+im->xorigin,last_y,
2744 im->gdes[i].linewidth,
2748 double new_y = ytr(im,im->gdes[i].p_data[ii]);
2749 if ( im->slopemode==0 && ! AlmostEqual2sComplement(new_y,last_y,4)){
2750 gfx_add_point(node,ii-1+im->xorigin,new_y);
2753 gfx_add_point(node,ii+im->xorigin,new_y);
2759 double *foreY=malloc(sizeof(double)*im->xsize*2);
2760 double *foreX=malloc(sizeof(double)*im->xsize*2);
2761 double *backY=malloc(sizeof(double)*im->xsize*2);
2762 double *backX=malloc(sizeof(double)*im->xsize*2);
2764 for(ii=0;ii<=im->xsize;ii++){
2766 if ( idxI > 0 && ( drawem != 0 || ii==im->xsize)){
2769 while (cntI < idxI && AlmostEqual2sComplement(foreY[lastI],foreY[cntI],4) && AlmostEqual2sComplement(foreY[lastI],foreY[cntI+1],4)){cntI++;}
2770 node = gfx_new_area(im->canvas,
2773 foreX[cntI],foreY[cntI], im->gdes[i].col);
2774 while (cntI < idxI) {
2777 while ( cntI < idxI && AlmostEqual2sComplement(foreY[lastI],foreY[cntI],4) && AlmostEqual2sComplement(foreY[lastI],foreY[cntI+1],4)){cntI++;}
2778 gfx_add_point(node,foreX[cntI],foreY[cntI]);
2780 gfx_add_point(node,backX[idxI],backY[idxI]);
2784 while ( idxI > 1 && AlmostEqual2sComplement(backY[lastI], backY[idxI],4) && AlmostEqual2sComplement(backY[lastI],backY[idxI-1],4)){idxI--;}
2785 gfx_add_point(node,backX[idxI],backY[idxI]);
2794 if (ii == im->xsize) break;
2796 /* keep things simple for now, just draw these bars
2797 do not try to build a big and complex area */
2800 if ( im->slopemode == 0 && ii==0){
2803 if ( isnan(im->gdes[i].p_data[ii]) ) {
2807 ytop = ytr(im,im->gdes[i].p_data[ii]);
2808 if ( lastgdes && im->gdes[i].stack ) {
2809 ybase = ytr(im,lastgdes->p_data[ii]);
2811 ybase = ytr(im,areazero);
2813 if ( ybase == ytop ){
2817 /* every area has to be wound clock-wise,
2818 so we have to make sur base remains base */
2820 double extra = ytop;
2824 if ( im->slopemode == 0 ){
2825 backY[++idxI] = ybase-0.2;
2826 backX[idxI] = ii+im->xorigin-1;
2827 foreY[idxI] = ytop+0.2;
2828 foreX[idxI] = ii+im->xorigin-1;
2830 backY[++idxI] = ybase-0.2;
2831 backX[idxI] = ii+im->xorigin;
2832 foreY[idxI] = ytop+0.2;
2833 foreX[idxI] = ii+im->xorigin;
2835 /* close up any remaining area */
2840 } /* else GF_LINE */
2841 } /* if color != 0x0 */
2842 /* make sure we do not run into trouble when stacking on NaN */
2843 for(ii=0;ii<im->xsize;ii++){
2844 if (isnan(im->gdes[i].p_data[ii])) {
2845 if (lastgdes && (im->gdes[i].stack)) {
2846 im->gdes[i].p_data[ii] = lastgdes->p_data[ii];
2848 im->gdes[i].p_data[ii] = areazero;
2852 lastgdes = &(im->gdes[i]);
2854 #ifdef WITH_PIECHART
2856 if(isnan(im->gdes[i].yrule)) /* fetch variable */
2857 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2859 if (finite(im->gdes[i].yrule)) { /* even the fetched var can be NaN */
2860 pie_part(im,im->gdes[i].col,
2861 im->pie_x,im->pie_y,im->piesize*0.4,
2862 M_PI*2.0*PieStart/100.0,
2863 M_PI*2.0*(PieStart+im->gdes[i].yrule)/100.0);
2864 PieStart += im->gdes[i].yrule;
2869 rrd_set_error("STACK should already be turned into LINE or AREA here");
2875 #ifdef WITH_PIECHART
2883 /* grid_paint also does the text */
2884 if( !(im->extra_flags & ONLY_GRAPH) )
2888 if( !(im->extra_flags & ONLY_GRAPH) )
2891 /* the RULES are the last thing to paint ... */
2892 for(i=0;i<im->gdes_c;i++){
2894 switch(im->gdes[i].gf){
2896 if(im->gdes[i].yrule >= im->minval
2897 && im->gdes[i].yrule <= im->maxval)
2898 gfx_new_line(im->canvas,
2899 im->xorigin,ytr(im,im->gdes[i].yrule),
2900 im->xorigin+im->xsize,ytr(im,im->gdes[i].yrule),
2901 1.0,im->gdes[i].col);
2904 if(im->gdes[i].xrule >= im->start
2905 && im->gdes[i].xrule <= im->end)
2906 gfx_new_line(im->canvas,
2907 xtr(im,im->gdes[i].xrule),im->yorigin,
2908 xtr(im,im->gdes[i].xrule),im->yorigin-im->ysize,
2909 1.0,im->gdes[i].col);
2917 if (strcmp(im->graphfile,"-")==0) {
2918 fo = im->graphhandle ? im->graphhandle : stdout;
2919 #if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
2920 /* Change translation mode for stdout to BINARY */
2921 _setmode( _fileno( fo ), O_BINARY );
2924 if ((fo = fopen(im->graphfile,"wb")) == NULL) {
2925 rrd_set_error("Opening '%s' for write: %s",im->graphfile,
2926 rrd_strerror(errno));
2930 gfx_render (im->canvas,im->ximg,im->yimg,0x00000000,fo);
2931 if (strcmp(im->graphfile,"-") != 0)
2937 /*****************************************************
2939 *****************************************************/
2942 gdes_alloc(image_desc_t *im){
2945 if ((im->gdes = (graph_desc_t *) rrd_realloc(im->gdes, (im->gdes_c)
2946 * sizeof(graph_desc_t)))==NULL){
2947 rrd_set_error("realloc graph_descs");
2952 im->gdes[im->gdes_c-1].step=im->step;
2953 im->gdes[im->gdes_c-1].step_orig=im->step;
2954 im->gdes[im->gdes_c-1].stack=0;
2955 im->gdes[im->gdes_c-1].linewidth=0;
2956 im->gdes[im->gdes_c-1].debug=0;
2957 im->gdes[im->gdes_c-1].start=im->start;
2958 im->gdes[im->gdes_c-1].start_orig=im->start;
2959 im->gdes[im->gdes_c-1].end=im->end;
2960 im->gdes[im->gdes_c-1].end_orig=im->end;
2961 im->gdes[im->gdes_c-1].vname[0]='\0';
2962 im->gdes[im->gdes_c-1].data=NULL;
2963 im->gdes[im->gdes_c-1].ds_namv=NULL;
2964 im->gdes[im->gdes_c-1].data_first=0;
2965 im->gdes[im->gdes_c-1].p_data=NULL;
2966 im->gdes[im->gdes_c-1].rpnp=NULL;
2967 im->gdes[im->gdes_c-1].shift=0;
2968 im->gdes[im->gdes_c-1].col = 0x0;
2969 im->gdes[im->gdes_c-1].legend[0]='\0';
2970 im->gdes[im->gdes_c-1].format[0]='\0';
2971 im->gdes[im->gdes_c-1].strftm=0;
2972 im->gdes[im->gdes_c-1].rrd[0]='\0';
2973 im->gdes[im->gdes_c-1].ds=-1;
2974 im->gdes[im->gdes_c-1].cf_reduce=CF_AVERAGE;
2975 im->gdes[im->gdes_c-1].cf=CF_AVERAGE;
2976 im->gdes[im->gdes_c-1].p_data=NULL;
2977 im->gdes[im->gdes_c-1].yrule=DNAN;
2978 im->gdes[im->gdes_c-1].xrule=0;
2982 /* copies input untill the first unescaped colon is found
2983 or until input ends. backslashes have to be escaped as well */
2985 scan_for_col(const char *const input, int len, char *const output)
2990 input[inp] != ':' &&
2993 if (input[inp] == '\\' &&
2994 input[inp+1] != '\0' &&
2995 (input[inp+1] == '\\' ||
2996 input[inp+1] == ':')){
2997 output[outp++] = input[++inp];
3000 output[outp++] = input[inp];
3003 output[outp] = '\0';
3006 /* Some surgery done on this function, it became ridiculously big.
3008 ** - initializing now in rrd_graph_init()
3009 ** - options parsing now in rrd_graph_options()
3010 ** - script parsing now in rrd_graph_script()
3013 rrd_graph(int argc, char **argv, char ***prdata, int *xsize, int *ysize, FILE *stream, double *ymin, double *ymax)
3016 rrd_graph_init(&im);
3017 im.graphhandle = stream;
3019 rrd_graph_options(argc,argv,&im);
3020 if (rrd_test_error()) {
3025 if (strlen(argv[optind])>=MAXPATH) {
3026 rrd_set_error("filename (including path) too long");
3030 strncpy(im.graphfile,argv[optind],MAXPATH-1);
3031 im.graphfile[MAXPATH-1]='\0';
3033 rrd_graph_script(argc,argv,&im,1);
3034 if (rrd_test_error()) {
3039 /* Everything is now read and the actual work can start */
3042 if (graph_paint(&im,prdata)==-1){
3047 /* The image is generated and needs to be output.
3048 ** Also, if needed, print a line with information about the image.
3058 /* maybe prdata is not allocated yet ... lets do it now */
3059 if ((*prdata = calloc(2,sizeof(char *)))==NULL) {
3060 rrd_set_error("malloc imginfo");
3064 if(((*prdata)[0] = malloc((strlen(im.imginfo)+200+strlen(im.graphfile))*sizeof(char)))
3066 rrd_set_error("malloc imginfo");
3069 filename=im.graphfile+strlen(im.graphfile);
3070 while(filename > im.graphfile) {
3071 if (*(filename-1)=='/' || *(filename-1)=='\\' ) break;
3075 sprintf((*prdata)[0],im.imginfo,filename,(long)(im.canvas->zoom*im.ximg),(long)(im.canvas->zoom*im.yimg));
3082 rrd_graph_init(image_desc_t *im)
3089 #ifdef HAVE_SETLOCALE
3090 setlocale(LC_TIME,"");
3091 #ifdef HAVE_MBSTOWCS
3092 setlocale(LC_CTYPE,"");
3098 im->xlab_user.minsec = -1;
3104 im->ylegend[0] = '\0';
3105 im->title[0] = '\0';
3106 im->watermark[0] = '\0';
3109 im->unitsexponent= 9999;
3112 im->viewfactor = 1.0;
3119 im->logarithmic = 0;
3120 im->ygridstep = DNAN;
3121 im->draw_x_grid = 1;
3122 im->draw_y_grid = 1;
3127 im->canvas = gfx_new_canvas();
3128 im->grid_dash_on = 1;
3129 im->grid_dash_off = 1;
3130 im->tabwidth = 40.0;
3132 for(i=0;i<DIM(graph_col);i++)
3133 im->graph_col[i]=graph_col[i];
3135 #if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
3138 char rrd_win_default_font[1000];
3139 windir = getenv("windir");
3140 /* %windir% is something like D:\windows or C:\winnt */
3141 if (windir != NULL) {
3142 strncpy(rrd_win_default_font,windir,500);
3143 rrd_win_default_font[500] = '\0';
3144 strcat(rrd_win_default_font,"\\fonts\\");
3145 strcat(rrd_win_default_font,RRD_DEFAULT_FONT);
3146 for(i=0;i<DIM(text_prop);i++){
3147 strncpy(text_prop[i].font,rrd_win_default_font,sizeof(text_prop[i].font)-1);
3148 text_prop[i].font[sizeof(text_prop[i].font)-1] = '\0';
3155 deffont = getenv("RRD_DEFAULT_FONT");
3156 if (deffont != NULL) {
3157 for(i=0;i<DIM(text_prop);i++){
3158 strncpy(text_prop[i].font,deffont,sizeof(text_prop[i].font)-1);
3159 text_prop[i].font[sizeof(text_prop[i].font)-1] = '\0';
3163 for(i=0;i<DIM(text_prop);i++){
3164 im->text_prop[i].size = text_prop[i].size;
3165 strcpy(im->text_prop[i].font,text_prop[i].font);
3170 rrd_graph_options(int argc, char *argv[],image_desc_t *im)
3173 char *parsetime_error = NULL;
3174 char scan_gtm[12],scan_mtm[12],scan_ltm[12],col_nam[12];
3175 time_t start_tmp=0,end_tmp=0;
3177 struct rrd_time_value start_tv, end_tv;
3179 optind = 0; opterr = 0; /* initialize getopt */
3181 parsetime("end-24h", &start_tv);
3182 parsetime("now", &end_tv);
3184 /* defines for long options without a short equivalent. should be bytes,
3185 and may not collide with (the ASCII value of) short options */
3186 #define LONGOPT_UNITS_SI 255
3189 static struct option long_options[] =
3191 {"start", required_argument, 0, 's'},
3192 {"end", required_argument, 0, 'e'},
3193 {"x-grid", required_argument, 0, 'x'},
3194 {"y-grid", required_argument, 0, 'y'},
3195 {"vertical-label",required_argument,0,'v'},
3196 {"width", required_argument, 0, 'w'},
3197 {"height", required_argument, 0, 'h'},
3198 {"interlaced", no_argument, 0, 'i'},
3199 {"upper-limit",required_argument, 0, 'u'},
3200 {"lower-limit",required_argument, 0, 'l'},
3201 {"rigid", no_argument, 0, 'r'},
3202 {"base", required_argument, 0, 'b'},
3203 {"logarithmic",no_argument, 0, 'o'},
3204 {"color", required_argument, 0, 'c'},
3205 {"font", required_argument, 0, 'n'},
3206 {"title", required_argument, 0, 't'},
3207 {"imginfo", required_argument, 0, 'f'},
3208 {"imgformat", required_argument, 0, 'a'},
3209 {"lazy", no_argument, 0, 'z'},
3210 {"zoom", required_argument, 0, 'm'},
3211 {"no-legend", no_argument, 0, 'g'},
3212 {"force-rules-legend",no_argument,0, 'F'},
3213 {"only-graph", no_argument, 0, 'j'},
3214 {"alt-y-grid", no_argument, 0, 'Y'},
3215 {"no-minor", no_argument, 0, 'I'},
3216 {"slope-mode", no_argument, 0, 'E'},
3217 {"alt-autoscale", no_argument, 0, 'A'},
3218 {"alt-autoscale-max", no_argument, 0, 'M'},
3219 {"no-gridfit", no_argument, 0, 'N'},
3220 {"units-exponent",required_argument, 0, 'X'},
3221 {"units-length",required_argument, 0, 'L'},
3222 {"units", required_argument, 0, LONGOPT_UNITS_SI },
3223 {"step", required_argument, 0, 'S'},
3224 {"tabwidth", required_argument, 0, 'T'},
3225 {"font-render-mode", required_argument, 0, 'R'},
3226 {"font-smoothing-threshold", required_argument, 0, 'B'},
3227 {"watermark", required_argument, 0, 'W'},
3228 {"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 */
3230 int option_index = 0;
3232 int col_start,col_end;
3234 opt = getopt_long(argc, argv,
3235 "s:e:x:y:v:w:h:iu:l:rb:oc:n:m:t:f:a:I:zgjFYAMEX:L:S:T:NR:B:W:",
3236 long_options, &option_index);
3243 im->extra_flags |= NOMINOR;
3246 im->extra_flags |= ALTYGRID;
3249 im->extra_flags |= ALTAUTOSCALE;
3252 im->extra_flags |= ALTAUTOSCALE_MAX;
3255 im->extra_flags |= ONLY_GRAPH;
3258 im->extra_flags |= NOLEGEND;
3261 im->extra_flags |= FORCE_RULES_LEGEND;
3263 case LONGOPT_UNITS_SI:
3264 if(im->extra_flags & FORCE_UNITS) {
3265 rrd_set_error("--units can only be used once!");
3268 if(strcmp(optarg,"si")==0)
3269 im->extra_flags |= FORCE_UNITS_SI;
3271 rrd_set_error("invalid argument for --units: %s", optarg );
3276 im->unitsexponent = atoi(optarg);
3279 im->unitslength = atoi(optarg);
3282 im->tabwidth = atof(optarg);
3285 im->step = atoi(optarg);
3291 if ((parsetime_error = parsetime(optarg, &start_tv))) {
3292 rrd_set_error( "start time: %s", parsetime_error );
3297 if ((parsetime_error = parsetime(optarg, &end_tv))) {
3298 rrd_set_error( "end time: %s", parsetime_error );
3303 if(strcmp(optarg,"none") == 0){
3309 "%10[A-Z]:%ld:%10[A-Z]:%ld:%10[A-Z]:%ld:%ld:%n",
3311 &im->xlab_user.gridst,
3313 &im->xlab_user.mgridst,
3315 &im->xlab_user.labst,
3316 &im->xlab_user.precis,
3317 &stroff) == 7 && stroff != 0){
3318 strncpy(im->xlab_form, optarg+stroff, sizeof(im->xlab_form) - 1);
3319 im->xlab_form[sizeof(im->xlab_form)-1] = '\0';
3320 if((int)(im->xlab_user.gridtm = tmt_conv(scan_gtm)) == -1){
3321 rrd_set_error("unknown keyword %s",scan_gtm);
3323 } else if ((int)(im->xlab_user.mgridtm = tmt_conv(scan_mtm)) == -1){
3324 rrd_set_error("unknown keyword %s",scan_mtm);
3326 } else if ((int)(im->xlab_user.labtm = tmt_conv(scan_ltm)) == -1){
3327 rrd_set_error("unknown keyword %s",scan_ltm);
3330 im->xlab_user.minsec = 1;
3331 im->xlab_user.stst = im->xlab_form;
3333 rrd_set_error("invalid x-grid format");
3339 if(strcmp(optarg,"none") == 0){
3347 &im->ylabfact) == 2) {
3348 if(im->ygridstep<=0){
3349 rrd_set_error("grid step must be > 0");
3351 } else if (im->ylabfact < 1){
3352 rrd_set_error("label factor must be > 0");
3356 rrd_set_error("invalid y-grid format");
3361 strncpy(im->ylegend,optarg,150);
3362 im->ylegend[150]='\0';
3365 im->maxval = atof(optarg);
3368 im->minval = atof(optarg);
3371 im->base = atol(optarg);
3372 if(im->base != 1024 && im->base != 1000 ){
3373 rrd_set_error("the only sensible value for base apart from 1000 is 1024");
3378 long_tmp = atol(optarg);
3379 if (long_tmp < 10) {
3380 rrd_set_error("width below 10 pixels");
3383 im->xsize = long_tmp;
3386 long_tmp = atol(optarg);
3387 if (long_tmp < 10) {
3388 rrd_set_error("height below 10 pixels");
3391 im->ysize = long_tmp;
3394 im->canvas->interlaced = 1;
3400 im->imginfo = optarg;
3403 if((int)(im->canvas->imgformat = if_conv(optarg)) == -1) {
3404 rrd_set_error("unsupported graphics format '%s'",optarg);
3416 im->logarithmic = 1;
3420 "%10[A-Z]#%n%8lx%n",
3421 col_nam,&col_start,&color,&col_end) == 2){
3423 int col_len = col_end - col_start;
3427 ((color & 0xF00) * 0x110000) |
3428 ((color & 0x0F0) * 0x011000) |
3429 ((color & 0x00F) * 0x001100) |
3435 ((color & 0xF000) * 0x11000) |
3436 ((color & 0x0F00) * 0x01100) |
3437 ((color & 0x00F0) * 0x00110) |
3438 ((color & 0x000F) * 0x00011)
3442 color = (color << 8) + 0xff /* shift left by 8 */;
3447 rrd_set_error("the color format is #RRGGBB[AA]");
3450 if((ci=grc_conv(col_nam)) != -1){
3451 im->graph_col[ci]=color;
3453 rrd_set_error("invalid color name '%s'",col_nam);
3457 rrd_set_error("invalid color def format");
3464 char font[1024] = "";
3467 "%10[A-Z]:%lf:%1000s",
3468 prop,&size,font) >= 2){
3470 if((sindex=text_prop_conv(prop)) != -1){
3471 for (propidx=sindex;propidx<TEXT_PROP_LAST;propidx++){
3473 im->text_prop[propidx].size=size;
3475 if (strlen(font) > 0){
3476 strcpy(im->text_prop[propidx].font,font);
3478 if (propidx==sindex && sindex != 0) break;
3481 rrd_set_error("invalid fonttag '%s'",prop);
3485 rrd_set_error("invalid text property format");
3491 im->canvas->zoom = atof(optarg);
3492 if (im->canvas->zoom <= 0.0) {
3493 rrd_set_error("zoom factor must be > 0");
3498 strncpy(im->title,optarg,150);
3499 im->title[150]='\0';
3503 if ( strcmp( optarg, "normal" ) == 0 )
3504 im->canvas->aa_type = AA_NORMAL;
3505 else if ( strcmp( optarg, "light" ) == 0 )
3506 im->canvas->aa_type = AA_LIGHT;
3507 else if ( strcmp( optarg, "mono" ) == 0 )
3508 im->canvas->aa_type = AA_NONE;
3511 rrd_set_error("unknown font-render-mode '%s'", optarg );
3517 im->canvas->font_aa_threshold = atof(optarg);
3521 strncpy(im->watermark,optarg,100);
3522 im->watermark[99]='\0';
3527 rrd_set_error("unknown option '%c'", optopt);
3529 rrd_set_error("unknown option '%s'",argv[optind-1]);
3534 if (optind >= argc) {
3535 rrd_set_error("missing filename");
3539 if (im->logarithmic == 1 && im->minval <= 0){
3540 rrd_set_error("for a logarithmic yaxis you must specify a lower-limit > 0");
3544 if (proc_start_end(&start_tv,&end_tv,&start_tmp,&end_tmp) == -1){
3545 /* error string is set in parsetime.c */
3549 if (start_tmp < 3600*24*365*10){
3550 rrd_set_error("the first entry to fetch should be after 1980 (%ld)",start_tmp);
3554 if (end_tmp < start_tmp) {
3555 rrd_set_error("start (%ld) should be less than end (%ld)",
3556 start_tmp, end_tmp);
3560 im->start = start_tmp;
3562 im->step = max((long)im->step, (im->end-im->start)/im->xsize);
3566 rrd_graph_check_vname(image_desc_t *im, char *varname, char *err)
3568 if ((im->gdes[im->gdes_c-1].vidx=find_var(im,varname))==-1) {
3569 rrd_set_error("Unknown variable '%s' in %s",varname,err);
3575 rrd_graph_color(image_desc_t *im, char *var, char *err, int optional)
3578 graph_desc_t *gdp=&im->gdes[im->gdes_c-1];
3580 color=strstr(var,"#");
3583 rrd_set_error("Found no color in %s",err);
3592 rest=strstr(color,":");
3600 sscanf(color,"#%6lx%n",&col,&n);
3601 col = (col << 8) + 0xff /* shift left by 8 */;
3602 if (n!=7) rrd_set_error("Color problem in %s",err);
3605 sscanf(color,"#%8lx%n",&col,&n);
3608 rrd_set_error("Color problem in %s",err);
3610 if (rrd_test_error()) return 0;
3617 int bad_format(char *fmt) {
3621 while (*ptr != '\0')
3622 if (*ptr++ == '%') {
3624 /* line cannot end with percent char */
3625 if (*ptr == '\0') return 1;
3627 /* '%s', '%S' and '%%' are allowed */
3628 if (*ptr == 's' || *ptr == 'S' || *ptr == '%') ptr++;
3630 /* %c is allowed (but use only with vdef!) */
3631 else if (*ptr == 'c') {
3636 /* or else '% 6.2lf' and such are allowed */
3638 /* optional padding character */
3639 if (*ptr == ' ' || *ptr == '+' || *ptr == '-') ptr++;
3641 /* This should take care of 'm.n' with all three optional */
3642 while (*ptr >= '0' && *ptr <= '9') ptr++;
3643 if (*ptr == '.') ptr++;
3644 while (*ptr >= '0' && *ptr <= '9') ptr++;
3646 /* Either 'le', 'lf' or 'lg' must follow here */
3647 if (*ptr++ != 'l') return 1;
3648 if (*ptr == 'e' || *ptr == 'f' || *ptr == 'g') ptr++;
3659 vdef_parse(gdes,str)
3660 struct graph_desc_t *gdes;
3661 const char *const str;
3663 /* A VDEF currently is either "func" or "param,func"
3664 * so the parsing is rather simple. Change if needed.
3671 sscanf(str,"%le,%29[A-Z]%n",¶m,func,&n);
3672 if (n== (int)strlen(str)) { /* matched */
3676 sscanf(str,"%29[A-Z]%n",func,&n);
3677 if (n== (int)strlen(str)) { /* matched */
3680 rrd_set_error("Unknown function string '%s' in VDEF '%s'"
3687 if (!strcmp("PERCENT",func)) gdes->vf.op = VDEF_PERCENT;
3688 else if (!strcmp("MAXIMUM",func)) gdes->vf.op = VDEF_MAXIMUM;
3689 else if (!strcmp("AVERAGE",func)) gdes->vf.op = VDEF_AVERAGE;
3690 else if (!strcmp("MINIMUM",func)) gdes->vf.op = VDEF_MINIMUM;
3691 else if (!strcmp("TOTAL", func)) gdes->vf.op = VDEF_TOTAL;
3692 else if (!strcmp("FIRST", func)) gdes->vf.op = VDEF_FIRST;
3693 else if (!strcmp("LAST", func)) gdes->vf.op = VDEF_LAST;
3694 else if (!strcmp("LSLSLOPE", func)) gdes->vf.op = VDEF_LSLSLOPE;
3695 else if (!strcmp("LSLINT", func)) gdes->vf.op = VDEF_LSLINT;
3696 else if (!strcmp("LSLCORREL",func)) gdes->vf.op = VDEF_LSLCORREL;
3698 rrd_set_error("Unknown function '%s' in VDEF '%s'\n"
3705 switch (gdes->vf.op) {
3707 if (isnan(param)) { /* no parameter given */
3708 rrd_set_error("Function '%s' needs parameter in VDEF '%s'\n"
3714 if (param>=0.0 && param<=100.0) {
3715 gdes->vf.param = param;
3716 gdes->vf.val = DNAN; /* undefined */
3717 gdes->vf.when = 0; /* undefined */
3719 rrd_set_error("Parameter '%f' out of range in VDEF '%s'\n"
3734 case VDEF_LSLCORREL:
3736 gdes->vf.param = DNAN;
3737 gdes->vf.val = DNAN;
3740 rrd_set_error("Function '%s' needs no parameter in VDEF '%s'\n"
3757 graph_desc_t *src,*dst;
3761 dst = &im->gdes[gdi];
3762 src = &im->gdes[dst->vidx];
3763 data = src->data + src->ds;
3764 steps = (src->end - src->start) / src->step;
3767 printf("DEBUG: start == %lu, end == %lu, %lu steps\n"
3774 switch (dst->vf.op) {
3775 case VDEF_PERCENT: {
3776 rrd_value_t * array;
3780 if ((array = malloc(steps*sizeof(double)))==NULL) {
3781 rrd_set_error("malloc VDEV_PERCENT");
3784 for (step=0;step < steps; step++) {
3785 array[step]=data[step*src->ds_cnt];
3787 qsort(array,step,sizeof(double),vdef_percent_compar);
3789 field = (steps-1)*dst->vf.param/100;
3790 dst->vf.val = array[field];
3791 dst->vf.when = 0; /* no time component */
3794 for(step=0;step<steps;step++)
3795 printf("DEBUG: %3li:%10.2f %c\n",step,array[step],step==field?'*':' ');
3801 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3802 if (step == steps) {
3806 dst->vf.val = data[step*src->ds_cnt];
3807 dst->vf.when = src->start + (step+1)*src->step;
3809 while (step != steps) {
3810 if (finite(data[step*src->ds_cnt])) {
3811 if (data[step*src->ds_cnt] > dst->vf.val) {
3812 dst->vf.val = data[step*src->ds_cnt];
3813 dst->vf.when = src->start + (step+1)*src->step;
3820 case VDEF_AVERAGE: {
3823 for (step=0;step<steps;step++) {
3824 if (finite(data[step*src->ds_cnt])) {
3825 sum += data[step*src->ds_cnt];
3830 if (dst->vf.op == VDEF_TOTAL) {
3831 dst->vf.val = sum*src->step;
3832 dst->vf.when = 0; /* no time component */
3834 dst->vf.val = sum/cnt;
3835 dst->vf.when = 0; /* no time component */
3845 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3846 if (step == steps) {
3850 dst->vf.val = data[step*src->ds_cnt];
3851 dst->vf.when = src->start + (step+1)*src->step;
3853 while (step != steps) {
3854 if (finite(data[step*src->ds_cnt])) {
3855 if (data[step*src->ds_cnt] < dst->vf.val) {
3856 dst->vf.val = data[step*src->ds_cnt];
3857 dst->vf.when = src->start + (step+1)*src->step;
3864 /* The time value returned here is one step before the
3865 * actual time value. This is the start of the first
3869 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3870 if (step == steps) { /* all entries were NaN */
3874 dst->vf.val = data[step*src->ds_cnt];
3875 dst->vf.when = src->start + step*src->step;
3879 /* The time value returned here is the
3880 * actual time value. This is the end of the last
3884 while (step >= 0 && isnan(data[step*src->ds_cnt])) step--;
3885 if (step < 0) { /* all entries were NaN */
3889 dst->vf.val = data[step*src->ds_cnt];
3890 dst->vf.when = src->start + (step+1)*src->step;
3895 case VDEF_LSLCORREL:{
3896 /* Bestfit line by linear least squares method */
3899 double SUMx, SUMy, SUMxy, SUMxx, SUMyy, slope, y_intercept, correl ;
3900 SUMx = 0; SUMy = 0; SUMxy = 0; SUMxx = 0; SUMyy = 0;
3902 for (step=0;step<steps;step++) {
3903 if (finite(data[step*src->ds_cnt])) {
3906 SUMxx += step * step;
3907 SUMxy += step * data[step*src->ds_cnt];
3908 SUMy += data[step*src->ds_cnt];
3909 SUMyy += data[step*src->ds_cnt]*data[step*src->ds_cnt];
3913 slope = ( SUMx*SUMy - cnt*SUMxy ) / ( SUMx*SUMx - cnt*SUMxx );
3914 y_intercept = ( SUMy - slope*SUMx ) / cnt;
3915 correl = (SUMxy - (SUMx*SUMy)/cnt) / sqrt((SUMxx - (SUMx*SUMx)/cnt)*(SUMyy - (SUMy*SUMy)/cnt));
3918 if (dst->vf.op == VDEF_LSLSLOPE) {
3919 dst->vf.val = slope;
3921 } else if (dst->vf.op == VDEF_LSLINT) {
3922 dst->vf.val = y_intercept;
3924 } else if (dst->vf.op == VDEF_LSLCORREL) {
3925 dst->vf.val = correl;
3939 /* NaN < -INF < finite_values < INF */
3941 vdef_percent_compar(a,b)
3944 /* Equality is not returned; this doesn't hurt except
3945 * (maybe) for a little performance.
3948 /* First catch NaN values. They are smallest */
3949 if (isnan( *(double *)a )) return -1;
3950 if (isnan( *(double *)b )) return 1;
3952 /* NaN doesn't reach this part so INF and -INF are extremes.
3953 * The sign from isinf() is compatible with the sign we return
3955 if (isinf( *(double *)a )) return isinf( *(double *)a );
3956 if (isinf( *(double *)b )) return isinf( *(double *)b );
3958 /* If we reach this, both values must be finite */
3959 if ( *(double *)a < *(double *)b ) return -1; else return 1;