1 /****************************************************************************
2 * RRDtool 1.2.x Copyright Tobias Oetiker, 1997 - 2005
3 ****************************************************************************
4 * rrd__graph.c produce graphs from data in rrdfiles
5 ****************************************************************************/
25 #include "rrd_graph.h"
27 /* some constant definitions */
31 char rrd_win_default_font[80];
34 #ifndef RRD_DEFAULT_FONT
35 /* there is special code later to pick Cour.ttf when running on windows */
36 #define RRD_DEFAULT_FONT "VeraMono.ttf"
39 text_prop_t text_prop[] = {
40 { 10.0, RRD_DEFAULT_FONT }, /* default */
41 { 10.0, RRD_DEFAULT_FONT }, /* title */
42 { 8.0, RRD_DEFAULT_FONT }, /* axis */
43 { 10.0, RRD_DEFAULT_FONT }, /* unit */
44 { 10.0, RRD_DEFAULT_FONT } /* legend */
48 {0, TMT_SECOND,30, TMT_MINUTE,5, TMT_MINUTE,5, 0,"%H:%M"},
49 {2, TMT_MINUTE,1, TMT_MINUTE,5, TMT_MINUTE,5, 0,"%H:%M"},
50 {5, TMT_MINUTE,2, TMT_MINUTE,10, TMT_MINUTE,10, 0,"%H:%M"},
51 {10, TMT_MINUTE,5, TMT_MINUTE,20, TMT_MINUTE,20, 0,"%H:%M"},
52 {30, TMT_MINUTE,10, TMT_HOUR,1, TMT_HOUR,1, 0,"%H:%M"},
53 {60, TMT_MINUTE,30, TMT_HOUR,2, TMT_HOUR,2, 0,"%H:%M"},
54 {180, TMT_HOUR,1, TMT_HOUR,6, TMT_HOUR,6, 0,"%H:%M"},
55 /*{300, TMT_HOUR,3, TMT_HOUR,12, TMT_HOUR,12, 12*3600,"%a %p"}, this looks silly*/
56 {600, TMT_HOUR,6, TMT_DAY,1, TMT_DAY,1, 24*3600,"%a"},
57 {1800, TMT_HOUR,12, TMT_DAY,1, TMT_DAY,2, 24*3600,"%a"},
58 {3600, TMT_DAY,1, TMT_WEEK,1, TMT_WEEK,1, 7*24*3600,"Week %V"},
59 {3*3600, TMT_WEEK,1, TMT_MONTH,1, TMT_WEEK,2, 7*24*3600,"Week %V"},
60 {6*3600, TMT_MONTH,1, TMT_MONTH,1, TMT_MONTH,1, 30*24*3600,"%b"},
61 {48*3600, TMT_MONTH,1, TMT_MONTH,3, TMT_MONTH,3, 30*24*3600,"%b"},
62 {10*24*3600, TMT_YEAR,1, TMT_YEAR,1, TMT_YEAR,1, 365*24*3600,"%y"},
63 {-1,TMT_MONTH,0,TMT_MONTH,0,TMT_MONTH,0,0,""}
66 /* sensible logarithmic y label intervals ...
67 the first element of each row defines the possible starting points on the
68 y axis ... the other specify the */
70 double yloglab[][12]= {{ 1e9, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
71 { 1e3, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
72 { 1e1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
73 /* { 1e1, 1, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, */
74 { 1e1, 1, 2.5, 5, 7.5, 0, 0, 0, 0, 0, 0, 0 },
75 { 1e1, 1, 2, 4, 6, 8, 0, 0, 0, 0, 0, 0 },
76 { 1e1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0 },
77 { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }};
79 /* sensible y label intervals ...*/
97 gfx_color_t graph_col[] = /* default colors */
98 { 0xFFFFFFFF, /* canvas */
99 0xF0F0F0FF, /* background */
100 0xD0D0D0FF, /* shade A */
101 0xA0A0A0FF, /* shade B */
102 0x90909080, /* grid */
103 0xE0505080, /* major grid */
104 0x000000FF, /* font */
105 0xFF0000FF, /* arrow */
106 0x404040FF /* axis */
113 # define DPRINT(x) (void)(printf x, printf("\n"))
119 /* initialize with xtr(im,0); */
121 xtr(image_desc_t *im,time_t mytime){
124 pixie = (double) im->xsize / (double)(im->end - im->start);
127 return (int)((double)im->xorigin
128 + pixie * ( mytime - im->start ) );
131 /* translate data values into y coordinates */
133 ytr(image_desc_t *im, double value){
138 pixie = (double) im->ysize / (im->maxval - im->minval);
140 pixie = (double) im->ysize / (log10(im->maxval) - log10(im->minval));
142 } else if(!im->logarithmic) {
143 yval = im->yorigin - pixie * (value - im->minval);
145 if (value < im->minval) {
148 yval = im->yorigin - pixie * (log10(value) - log10(im->minval));
151 /* make sure we don't return anything too unreasonable. GD lib can
152 get terribly slow when drawing lines outside its scope. This is
153 especially problematic in connection with the rigid option */
155 /* keep yval as-is */
156 } else if (yval > im->yorigin) {
157 yval = im->yorigin+2;
158 } else if (yval < im->yorigin - im->ysize){
159 yval = im->yorigin - im->ysize - 2;
166 /* conversion function for symbolic entry names */
169 #define conv_if(VV,VVV) \
170 if (strcmp(#VV, string) == 0) return VVV ;
172 enum gf_en gf_conv(char *string){
174 conv_if(PRINT,GF_PRINT)
175 conv_if(GPRINT,GF_GPRINT)
176 conv_if(COMMENT,GF_COMMENT)
177 conv_if(HRULE,GF_HRULE)
178 conv_if(VRULE,GF_VRULE)
179 conv_if(LINE,GF_LINE)
180 conv_if(AREA,GF_AREA)
181 conv_if(STACK,GF_STACK)
182 conv_if(TICK,GF_TICK)
184 conv_if(CDEF,GF_CDEF)
185 conv_if(VDEF,GF_VDEF)
186 conv_if(PART,GF_PART)
187 conv_if(XPORT,GF_XPORT)
188 conv_if(SHIFT,GF_SHIFT)
193 enum gfx_if_en if_conv(char *string){
203 enum tmt_en tmt_conv(char *string){
205 conv_if(SECOND,TMT_SECOND)
206 conv_if(MINUTE,TMT_MINUTE)
207 conv_if(HOUR,TMT_HOUR)
209 conv_if(WEEK,TMT_WEEK)
210 conv_if(MONTH,TMT_MONTH)
211 conv_if(YEAR,TMT_YEAR)
215 enum grc_en grc_conv(char *string){
217 conv_if(BACK,GRC_BACK)
218 conv_if(CANVAS,GRC_CANVAS)
219 conv_if(SHADEA,GRC_SHADEA)
220 conv_if(SHADEB,GRC_SHADEB)
221 conv_if(GRID,GRC_GRID)
222 conv_if(MGRID,GRC_MGRID)
223 conv_if(FONT,GRC_FONT)
224 conv_if(ARROW,GRC_ARROW)
225 conv_if(AXIS,GRC_AXIS)
230 enum text_prop_en text_prop_conv(char *string){
232 conv_if(DEFAULT,TEXT_PROP_DEFAULT)
233 conv_if(TITLE,TEXT_PROP_TITLE)
234 conv_if(AXIS,TEXT_PROP_AXIS)
235 conv_if(UNIT,TEXT_PROP_UNIT)
236 conv_if(LEGEND,TEXT_PROP_LEGEND)
244 im_free(image_desc_t *im)
248 if (im == NULL) return 0;
249 for(i=0;i<(unsigned)im->gdes_c;i++){
250 if (im->gdes[i].data_first){
251 /* careful here, because a single pointer can occur several times */
252 free (im->gdes[i].data);
253 if (im->gdes[i].ds_namv){
254 for (ii=0;ii<im->gdes[i].ds_cnt;ii++)
255 free(im->gdes[i].ds_namv[ii]);
256 free(im->gdes[i].ds_namv);
259 free (im->gdes[i].p_data);
260 free (im->gdes[i].rpnp);
263 gfx_destroy(im->canvas);
267 /* find SI magnitude symbol for the given number*/
270 image_desc_t *im, /* image description */
277 char *symbol[] = {"a", /* 10e-18 Atto */
278 "f", /* 10e-15 Femto */
279 "p", /* 10e-12 Pico */
280 "n", /* 10e-9 Nano */
281 "u", /* 10e-6 Micro */
282 "m", /* 10e-3 Milli */
287 "T", /* 10e12 Tera */
288 "P", /* 10e15 Peta */
294 if (*value == 0.0 || isnan(*value) ) {
298 sindex = floor(log(fabs(*value))/log((double)im->base));
299 *magfact = pow((double)im->base, (double)sindex);
300 (*value) /= (*magfact);
302 if ( sindex <= symbcenter && sindex >= -symbcenter) {
303 (*symb_ptr) = symbol[sindex+symbcenter];
311 /* find SI magnitude symbol for the numbers on the y-axis*/
314 image_desc_t *im /* image description */
318 char symbol[] = {'a', /* 10e-18 Atto */
319 'f', /* 10e-15 Femto */
320 'p', /* 10e-12 Pico */
321 'n', /* 10e-9 Nano */
322 'u', /* 10e-6 Micro */
323 'm', /* 10e-3 Milli */
328 'T', /* 10e12 Tera */
329 'P', /* 10e15 Peta */
335 if (im->unitsexponent != 9999) {
336 /* unitsexponent = 9, 6, 3, 0, -3, -6, -9, etc */
337 digits = floor(im->unitsexponent / 3);
339 digits = floor( log( max( fabs(im->minval),fabs(im->maxval)))/log((double)im->base));
341 im->magfact = pow((double)im->base , digits);
344 printf("digits %6.3f im->magfact %6.3f\n",digits,im->magfact);
347 if ( ((digits+symbcenter) < sizeof(symbol)) &&
348 ((digits+symbcenter) >= 0) )
349 im->symbol = symbol[(int)digits+symbcenter];
354 /* move min and max values around to become sensible */
357 expand_range(image_desc_t *im)
359 double sensiblevalues[] ={1000.0,900.0,800.0,750.0,700.0,
360 600.0,500.0,400.0,300.0,250.0,
361 200.0,125.0,100.0,90.0,80.0,
362 75.0,70.0,60.0,50.0,40.0,30.0,
363 25.0,20.0,10.0,9.0,8.0,
364 7.0,6.0,5.0,4.0,3.5,3.0,
365 2.5,2.0,1.8,1.5,1.2,1.0,
366 0.8,0.7,0.6,0.5,0.4,0.3,0.2,0.1,0.0,-1};
368 double scaled_min,scaled_max;
375 printf("Min: %6.2f Max: %6.2f MagFactor: %6.2f\n",
376 im->minval,im->maxval,im->magfact);
379 if (isnan(im->ygridstep)){
380 if(im->extra_flags & ALTAUTOSCALE) {
381 /* measure the amplitude of the function. Make sure that
382 graph boundaries are slightly higher then max/min vals
383 so we can see amplitude on the graph */
386 delt = im->maxval - im->minval;
388 fact = 2.0 * pow(10.0,
389 floor(log10(max(fabs(im->minval), fabs(im->maxval)))) - 2);
391 adj = (fact - delt) * 0.55;
393 printf("Min: %6.2f Max: %6.2f delt: %6.2f fact: %6.2f adj: %6.2f\n", im->minval, im->maxval, delt, fact, adj);
399 else if(im->extra_flags & ALTAUTOSCALE_MAX) {
400 /* measure the amplitude of the function. Make sure that
401 graph boundaries are slightly higher than max vals
402 so we can see amplitude on the graph */
403 adj = (im->maxval - im->minval) * 0.1;
407 scaled_min = im->minval / im->magfact;
408 scaled_max = im->maxval / im->magfact;
410 for (i=1; sensiblevalues[i] > 0; i++){
411 if (sensiblevalues[i-1]>=scaled_min &&
412 sensiblevalues[i]<=scaled_min)
413 im->minval = sensiblevalues[i]*(im->magfact);
415 if (-sensiblevalues[i-1]<=scaled_min &&
416 -sensiblevalues[i]>=scaled_min)
417 im->minval = -sensiblevalues[i-1]*(im->magfact);
419 if (sensiblevalues[i-1] >= scaled_max &&
420 sensiblevalues[i] <= scaled_max)
421 im->maxval = sensiblevalues[i-1]*(im->magfact);
423 if (-sensiblevalues[i-1]<=scaled_max &&
424 -sensiblevalues[i] >=scaled_max)
425 im->maxval = -sensiblevalues[i]*(im->magfact);
429 /* adjust min and max to the grid definition if there is one */
430 im->minval = (double)im->ylabfact * im->ygridstep *
431 floor(im->minval / ((double)im->ylabfact * im->ygridstep));
432 im->maxval = (double)im->ylabfact * im->ygridstep *
433 ceil(im->maxval /( (double)im->ylabfact * im->ygridstep));
437 fprintf(stderr,"SCALED Min: %6.2f Max: %6.2f Factor: %6.2f\n",
438 im->minval,im->maxval,im->magfact);
443 apply_gridfit(image_desc_t *im)
445 if (isnan(im->minval) || isnan(im->maxval))
448 if (im->logarithmic) {
449 double ya, yb, ypix, ypixfrac;
450 double log10_range = log10(im->maxval) - log10(im->minval);
451 ya = pow((double)10, floor(log10(im->minval)));
452 while (ya < im->minval)
455 return; /* don't have y=10^x gridline */
457 if (yb <= im->maxval) {
458 /* we have at least 2 y=10^x gridlines.
459 Make sure distance between them in pixels
460 are an integer by expanding im->maxval */
461 double y_pixel_delta = ytr(im, ya) - ytr(im, yb);
462 double factor = y_pixel_delta / floor(y_pixel_delta);
463 double new_log10_range = factor * log10_range;
464 double new_ymax_log10 = log10(im->minval) + new_log10_range;
465 im->maxval = pow(10, new_ymax_log10);
466 ytr(im, DNAN); /* reset precalc */
467 log10_range = log10(im->maxval) - log10(im->minval);
469 /* make sure first y=10^x gridline is located on
470 integer pixel position by moving scale slightly
471 downwards (sub-pixel movement) */
472 ypix = ytr(im, ya) + im->ysize; /* add im->ysize so it always is positive */
473 ypixfrac = ypix - floor(ypix);
474 if (ypixfrac > 0 && ypixfrac < 1) {
475 double yfrac = ypixfrac / im->ysize;
476 im->minval = pow(10, log10(im->minval) - yfrac * log10_range);
477 im->maxval = pow(10, log10(im->maxval) - yfrac * log10_range);
478 ytr(im, DNAN); /* reset precalc */
481 /* Make sure we have an integer pixel distance between
482 each minor gridline */
483 double ypos1 = ytr(im, im->minval);
484 double ypos2 = ytr(im, im->minval + im->ygrid_scale.gridstep);
485 double y_pixel_delta = ypos1 - ypos2;
486 double factor = y_pixel_delta / floor(y_pixel_delta);
487 double new_range = factor * (im->maxval - im->minval);
488 double gridstep = im->ygrid_scale.gridstep;
489 double minor_y, minor_y_px, minor_y_px_frac;
490 im->maxval = im->minval + new_range;
491 ytr(im, DNAN); /* reset precalc */
492 /* make sure first minor gridline is on integer pixel y coord */
493 minor_y = gridstep * floor(im->minval / gridstep);
494 while (minor_y < im->minval)
496 minor_y_px = ytr(im, minor_y) + im->ysize; /* ensure > 0 by adding ysize */
497 minor_y_px_frac = minor_y_px - floor(minor_y_px);
498 if (minor_y_px_frac > 0 && minor_y_px_frac < 1) {
499 double yfrac = minor_y_px_frac / im->ysize;
500 double range = im->maxval - im->minval;
501 im->minval = im->minval - yfrac * range;
502 im->maxval = im->maxval - yfrac * range;
503 ytr(im, DNAN); /* reset precalc */
505 calc_horizontal_grid(im); /* recalc with changed im->maxval */
509 /* reduce data reimplementation by Alex */
513 enum cf_en cf, /* which consolidation function ?*/
514 unsigned long cur_step, /* step the data currently is in */
515 time_t *start, /* start, end and step as requested ... */
516 time_t *end, /* ... by the application will be ... */
517 unsigned long *step, /* ... adjusted to represent reality */
518 unsigned long *ds_cnt, /* number of data sources in file */
519 rrd_value_t **data) /* two dimensional array containing the data */
521 int i,reduce_factor = ceil((double)(*step) / (double)cur_step);
522 unsigned long col,dst_row,row_cnt,start_offset,end_offset,skiprows=0;
523 rrd_value_t *srcptr,*dstptr;
525 (*step) = cur_step*reduce_factor; /* set new step size for reduced data */
528 row_cnt = ((*end)-(*start))/cur_step;
534 printf("Reducing %lu rows with factor %i time %lu to %lu, step %lu\n",
535 row_cnt,reduce_factor,*start,*end,cur_step);
536 for (col=0;col<row_cnt;col++) {
537 printf("time %10lu: ",*start+(col+1)*cur_step);
538 for (i=0;i<*ds_cnt;i++)
539 printf(" %8.2e",srcptr[*ds_cnt*col+i]);
544 /* We have to combine [reduce_factor] rows of the source
545 ** into one row for the destination. Doing this we also
546 ** need to take care to combine the correct rows. First
547 ** alter the start and end time so that they are multiples
548 ** of the new step time. We cannot reduce the amount of
549 ** time so we have to move the end towards the future and
550 ** the start towards the past.
552 end_offset = (*end) % (*step);
553 start_offset = (*start) % (*step);
555 /* If there is a start offset (which cannot be more than
556 ** one destination row), skip the appropriate number of
557 ** source rows and one destination row. The appropriate
558 ** number is what we do know (start_offset/cur_step) of
559 ** the new interval (*step/cur_step aka reduce_factor).
562 printf("start_offset: %lu end_offset: %lu\n",start_offset,end_offset);
563 printf("row_cnt before: %lu\n",row_cnt);
566 (*start) = (*start)-start_offset;
567 skiprows=reduce_factor-start_offset/cur_step;
568 srcptr+=skiprows* *ds_cnt;
569 for (col=0;col<(*ds_cnt);col++) *dstptr++ = DNAN;
573 printf("row_cnt between: %lu\n",row_cnt);
576 /* At the end we have some rows that are not going to be
577 ** used, the amount is end_offset/cur_step
580 (*end) = (*end)-end_offset+(*step);
581 skiprows = end_offset/cur_step;
585 printf("row_cnt after: %lu\n",row_cnt);
588 /* Sanity check: row_cnt should be multiple of reduce_factor */
589 /* if this gets triggered, something is REALLY WRONG ... we die immediately */
591 if (row_cnt%reduce_factor) {
592 printf("SANITY CHECK: %lu rows cannot be reduced by %i \n",
593 row_cnt,reduce_factor);
594 printf("BUG in reduce_data()\n");
598 /* Now combine reduce_factor intervals at a time
599 ** into one interval for the destination.
602 for (dst_row=0;(long int)row_cnt>=reduce_factor;dst_row++) {
603 for (col=0;col<(*ds_cnt);col++) {
604 rrd_value_t newval=DNAN;
605 unsigned long validval=0;
607 for (i=0;i<reduce_factor;i++) {
608 if (isnan(srcptr[i*(*ds_cnt)+col])) {
612 if (isnan(newval)) newval = srcptr[i*(*ds_cnt)+col];
620 newval += srcptr[i*(*ds_cnt)+col];
623 newval = min (newval,srcptr[i*(*ds_cnt)+col]);
626 /* an interval contains a failure if any subintervals contained a failure */
628 newval = max (newval,srcptr[i*(*ds_cnt)+col]);
631 newval = srcptr[i*(*ds_cnt)+col];
636 if (validval == 0){newval = DNAN;} else{
654 srcptr+=(*ds_cnt)*reduce_factor;
655 row_cnt-=reduce_factor;
657 /* If we had to alter the endtime, we didn't have enough
658 ** source rows to fill the last row. Fill it with NaN.
660 if (end_offset) for (col=0;col<(*ds_cnt);col++) *dstptr++ = DNAN;
662 row_cnt = ((*end)-(*start))/ *step;
664 printf("Done reducing. Currently %lu rows, time %lu to %lu, step %lu\n",
665 row_cnt,*start,*end,*step);
666 for (col=0;col<row_cnt;col++) {
667 printf("time %10lu: ",*start+(col+1)*(*step));
668 for (i=0;i<*ds_cnt;i++)
669 printf(" %8.2e",srcptr[*ds_cnt*col+i]);
676 /* get the data required for the graphs from the
680 data_fetch(image_desc_t *im )
685 /* pull the data from the log files ... */
686 for (i=0;i< (int)im->gdes_c;i++){
687 /* only GF_DEF elements fetch data */
688 if (im->gdes[i].gf != GF_DEF)
692 /* do we have it already ?*/
693 for (ii=0;ii<i;ii++) {
694 if (im->gdes[ii].gf != GF_DEF)
696 if ((strcmp(im->gdes[i].rrd, im->gdes[ii].rrd) == 0)
697 && (im->gdes[i].cf == im->gdes[ii].cf)
698 && (im->gdes[i].cf_reduce == im->gdes[ii].cf_reduce)
699 && (im->gdes[i].start == im->gdes[ii].start)
700 && (im->gdes[i].end == im->gdes[ii].end)
701 && (im->gdes[i].step == im->gdes[ii].step)) {
702 /* OK, the data is already there.
703 ** Just copy the header portion
705 im->gdes[i].start = im->gdes[ii].start;
706 im->gdes[i].end = im->gdes[ii].end;
707 im->gdes[i].step = im->gdes[ii].step;
708 im->gdes[i].ds_cnt = im->gdes[ii].ds_cnt;
709 im->gdes[i].ds_namv = im->gdes[ii].ds_namv;
710 im->gdes[i].data = im->gdes[ii].data;
711 im->gdes[i].data_first = 0;
718 unsigned long ft_step = im->gdes[i].step ;
720 if((rrd_fetch_fn(im->gdes[i].rrd,
726 &im->gdes[i].ds_namv,
727 &im->gdes[i].data)) == -1){
730 im->gdes[i].data_first = 1;
731 im->gdes[i].step = im->step;
733 if (ft_step < im->gdes[i].step) {
734 reduce_data(im->gdes[i].cf_reduce,
742 im->gdes[i].step = ft_step;
746 /* lets see if the required data source is really there */
747 for(ii=0;ii<(int)im->gdes[i].ds_cnt;ii++){
748 if(strcmp(im->gdes[i].ds_namv[ii],im->gdes[i].ds_nam) == 0){
751 if (im->gdes[i].ds== -1){
752 rrd_set_error("No DS called '%s' in '%s'",
753 im->gdes[i].ds_nam,im->gdes[i].rrd);
761 /* evaluate the expressions in the CDEF functions */
763 /*************************************************************
765 *************************************************************/
768 find_var_wrapper(void *arg1, char *key)
770 return find_var((image_desc_t *) arg1, key);
773 /* find gdes containing var*/
775 find_var(image_desc_t *im, char *key){
777 for(ii=0;ii<im->gdes_c-1;ii++){
778 if((im->gdes[ii].gf == GF_DEF
779 || im->gdes[ii].gf == GF_VDEF
780 || im->gdes[ii].gf == GF_CDEF)
781 && (strcmp(im->gdes[ii].vname,key) == 0)){
788 /* find the largest common denominator for all the numbers
789 in the 0 terminated num array */
794 for (i=0;num[i+1]!=0;i++){
796 rest=num[i] % num[i+1];
797 num[i]=num[i+1]; num[i+1]=rest;
801 /* return i==0?num[i]:num[i-1]; */
805 /* run the rpn calculator on all the VDEF and CDEF arguments */
807 data_calc( image_desc_t *im){
811 long *steparray, rpi;
816 rpnstack_init(&rpnstack);
818 for (gdi=0;gdi<im->gdes_c;gdi++){
819 /* Look for GF_VDEF and GF_CDEF in the same loop,
820 * so CDEFs can use VDEFs and vice versa
822 switch (im->gdes[gdi].gf) {
826 graph_desc_t *vdp = &im->gdes[im->gdes[gdi].vidx];
828 /* remove current shift */
829 vdp->start -= vdp->shift;
830 vdp->end -= vdp->shift;
833 if (im->gdes[gdi].shidx >= 0)
834 vdp->shift = im->gdes[im->gdes[gdi].shidx].vf.val;
837 vdp->shift = im->gdes[gdi].shval;
839 /* normalize shift to multiple of consolidated step */
840 vdp->shift = (vdp->shift / (long)vdp->step) * (long)vdp->step;
843 vdp->start += vdp->shift;
844 vdp->end += vdp->shift;
848 /* A VDEF has no DS. This also signals other parts
849 * of rrdtool that this is a VDEF value, not a CDEF.
851 im->gdes[gdi].ds_cnt = 0;
852 if (vdef_calc(im,gdi)) {
853 rrd_set_error("Error processing VDEF '%s'"
856 rpnstack_free(&rpnstack);
861 im->gdes[gdi].ds_cnt = 1;
862 im->gdes[gdi].ds = 0;
863 im->gdes[gdi].data_first = 1;
864 im->gdes[gdi].start = 0;
865 im->gdes[gdi].end = 0;
870 /* Find the variables in the expression.
871 * - VDEF variables are substituted by their values
872 * and the opcode is changed into OP_NUMBER.
873 * - CDEF variables are analized for their step size,
874 * the lowest common denominator of all the step
875 * sizes of the data sources involved is calculated
876 * and the resulting number is the step size for the
877 * resulting data source.
879 for(rpi=0;im->gdes[gdi].rpnp[rpi].op != OP_END;rpi++){
880 if(im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
881 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER){
882 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
883 if (im->gdes[ptr].ds_cnt == 0) {
885 printf("DEBUG: inside CDEF '%s' processing VDEF '%s'\n",
887 im->gdes[ptr].vname);
888 printf("DEBUG: value from vdef is %f\n",im->gdes[ptr].vf.val);
890 im->gdes[gdi].rpnp[rpi].val = im->gdes[ptr].vf.val;
891 im->gdes[gdi].rpnp[rpi].op = OP_NUMBER;
894 rrd_realloc(steparray,
895 (++stepcnt+1)*sizeof(*steparray)))==NULL){
896 rrd_set_error("realloc steparray");
897 rpnstack_free(&rpnstack);
901 steparray[stepcnt-1] = im->gdes[ptr].step;
903 /* adjust start and end of cdef (gdi) so
904 * that it runs from the latest start point
905 * to the earliest endpoint of any of the
906 * rras involved (ptr)
908 if(im->gdes[gdi].start < im->gdes[ptr].start)
909 im->gdes[gdi].start = im->gdes[ptr].start;
911 if(im->gdes[gdi].end == 0 ||
912 im->gdes[gdi].end > im->gdes[ptr].end)
913 im->gdes[gdi].end = im->gdes[ptr].end;
915 /* store pointer to the first element of
916 * the rra providing data for variable,
917 * further save step size and data source
920 im->gdes[gdi].rpnp[rpi].data = im->gdes[ptr].data + im->gdes[ptr].ds;
921 im->gdes[gdi].rpnp[rpi].step = im->gdes[ptr].step;
922 im->gdes[gdi].rpnp[rpi].ds_cnt = im->gdes[ptr].ds_cnt;
924 /* backoff the *.data ptr; this is done so
925 * rpncalc() function doesn't have to treat
926 * the first case differently
928 } /* if ds_cnt != 0 */
929 } /* if OP_VARIABLE */
930 } /* loop through all rpi */
932 /* move the data pointers to the correct period */
933 for(rpi=0;im->gdes[gdi].rpnp[rpi].op != OP_END;rpi++){
934 if(im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
935 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER){
936 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
937 long diff = im->gdes[gdi].start - im->gdes[ptr].start;
940 im->gdes[gdi].rpnp[rpi].data += (diff / im->gdes[ptr].step) * im->gdes[ptr].ds_cnt;
944 if(steparray == NULL){
945 rrd_set_error("rpn expressions without DEF"
946 " or CDEF variables are not supported");
947 rpnstack_free(&rpnstack);
950 steparray[stepcnt]=0;
951 /* Now find the resulting step. All steps in all
952 * used RRAs have to be visited
954 im->gdes[gdi].step = lcd(steparray);
956 if((im->gdes[gdi].data = malloc((
957 (im->gdes[gdi].end-im->gdes[gdi].start)
958 / im->gdes[gdi].step)
959 * sizeof(double)))==NULL){
960 rrd_set_error("malloc im->gdes[gdi].data");
961 rpnstack_free(&rpnstack);
965 /* Step through the new cdef results array and
966 * calculate the values
968 for (now = im->gdes[gdi].start + im->gdes[gdi].step;
969 now<=im->gdes[gdi].end;
970 now += im->gdes[gdi].step)
972 rpnp_t *rpnp = im -> gdes[gdi].rpnp;
974 /* 3rd arg of rpn_calc is for OP_VARIABLE lookups;
975 * in this case we are advancing by timesteps;
976 * we use the fact that time_t is a synonym for long
978 if (rpn_calc(rpnp,&rpnstack,(long) now,
979 im->gdes[gdi].data,++dataidx) == -1) {
980 /* rpn_calc sets the error string */
981 rpnstack_free(&rpnstack);
984 } /* enumerate over time steps within a CDEF */
989 } /* enumerate over CDEFs */
990 rpnstack_free(&rpnstack);
994 /* massage data so, that we get one value for each x coordinate in the graph */
996 data_proc( image_desc_t *im ){
998 double pixstep = (double)(im->end-im->start)
999 /(double)im->xsize; /* how much time
1000 passes in one pixel */
1002 double minval=DNAN,maxval=DNAN;
1004 unsigned long gr_time;
1006 /* memory for the processed data */
1007 for(i=0;i<im->gdes_c;i++) {
1008 if((im->gdes[i].gf==GF_LINE) ||
1009 (im->gdes[i].gf==GF_AREA) ||
1010 (im->gdes[i].gf==GF_TICK) ||
1011 (im->gdes[i].gf==GF_STACK)) {
1012 if((im->gdes[i].p_data = malloc((im->xsize +1)
1013 * sizeof(rrd_value_t)))==NULL){
1014 rrd_set_error("malloc data_proc");
1020 for (i=0;i<im->xsize;i++) { /* for each pixel */
1022 gr_time = im->start+pixstep*i; /* time of the current step */
1025 for (ii=0;ii<im->gdes_c;ii++) {
1027 switch (im->gdes[ii].gf) {
1031 if (!im->gdes[ii].stack)
1034 value = im->gdes[ii].yrule;
1035 if (isnan(value) || (im->gdes[ii].gf == GF_TICK)) {
1036 /* The time of the data doesn't necessarily match
1037 ** the time of the graph. Beware.
1039 vidx = im->gdes[ii].vidx;
1040 if (im->gdes[vidx].gf == GF_VDEF) {
1041 value = im->gdes[vidx].vf.val;
1042 } else if (((long int)gr_time >= (long int)im->gdes[vidx].start) &&
1043 ((long int)gr_time <= (long int)im->gdes[vidx].end) ) {
1044 value = im->gdes[vidx].data[
1045 (unsigned long) floor(
1046 (double)(gr_time - im->gdes[vidx].start)
1047 / im->gdes[vidx].step)
1048 * im->gdes[vidx].ds_cnt
1056 if (! isnan(value)) {
1058 im->gdes[ii].p_data[i] = paintval;
1059 /* GF_TICK: the data values are not
1060 ** relevant for min and max
1062 if (finite(paintval) && im->gdes[ii].gf != GF_TICK ) {
1063 if (isnan(minval) || paintval < minval)
1065 if (isnan(maxval) || paintval > maxval)
1069 im->gdes[ii].p_data[i] = DNAN;
1078 /* if min or max have not been asigned a value this is because
1079 there was no data in the graph ... this is not good ...
1080 lets set these to dummy values then ... */
1082 if (isnan(minval)) minval = 0.0;
1083 if (isnan(maxval)) maxval = 1.0;
1085 /* adjust min and max values */
1086 if (isnan(im->minval)
1087 /* don't adjust low-end with log scale */
1088 || ((!im->logarithmic && !im->rigid) && im->minval > minval)
1090 im->minval = minval;
1091 if (isnan(im->maxval)
1092 || (!im->rigid && im->maxval < maxval)
1094 if (im->logarithmic)
1095 im->maxval = maxval * 1.1;
1097 im->maxval = maxval;
1099 /* make sure min is smaller than max */
1100 if (im->minval > im->maxval) {
1101 im->minval = 0.99 * im->maxval;
1104 /* make sure min and max are not equal */
1105 if (im->minval == im->maxval) {
1107 if (! im->logarithmic) {
1110 /* make sure min and max are not both zero */
1111 if (im->maxval == 0.0) {
1120 /* identify the point where the first gridline, label ... gets placed */
1124 time_t start, /* what is the initial time */
1125 enum tmt_en baseint, /* what is the basic interval */
1126 long basestep /* how many if these do we jump a time */
1130 localtime_r(&start, &tm);
1133 tm.tm_sec -= tm.tm_sec % basestep; break;
1136 tm.tm_min -= tm.tm_min % basestep;
1141 tm.tm_hour -= tm.tm_hour % basestep; break;
1143 /* we do NOT look at the basestep for this ... */
1146 tm.tm_hour = 0; break;
1148 /* we do NOT look at the basestep for this ... */
1152 tm.tm_mday -= tm.tm_wday -1; /* -1 because we want the monday */
1153 if (tm.tm_wday==0) tm.tm_mday -= 7; /* we want the *previous* monday */
1160 tm.tm_mon -= tm.tm_mon % basestep; break;
1168 tm.tm_year -= (tm.tm_year+1900) % basestep;
1173 /* identify the point where the next gridline, label ... gets placed */
1176 time_t current, /* what is the initial time */
1177 enum tmt_en baseint, /* what is the basic interval */
1178 long basestep /* how many if these do we jump a time */
1183 localtime_r(¤t, &tm);
1187 tm.tm_sec += basestep; break;
1189 tm.tm_min += basestep; break;
1191 tm.tm_hour += basestep; break;
1193 tm.tm_mday += basestep; break;
1195 tm.tm_mday += 7*basestep; break;
1197 tm.tm_mon += basestep; break;
1199 tm.tm_year += basestep;
1201 madetime = mktime(&tm);
1202 } while (madetime == -1); /* this is necessary to skip impssible times
1203 like the daylight saving time skips */
1209 /* calculate values required for PRINT and GPRINT functions */
1212 print_calc(image_desc_t *im, char ***prdata)
1214 long i,ii,validsteps;
1217 int graphelement = 0;
1220 double magfact = -1;
1224 if (im->imginfo) prlines++;
1225 for(i=0;i<im->gdes_c;i++){
1226 switch(im->gdes[i].gf){
1229 if(((*prdata) = rrd_realloc((*prdata),prlines*sizeof(char *)))==NULL){
1230 rrd_set_error("realloc prdata");
1234 /* PRINT and GPRINT can now print VDEF generated values.
1235 * There's no need to do any calculations on them as these
1236 * calculations were already made.
1238 vidx = im->gdes[i].vidx;
1239 if (im->gdes[vidx].gf==GF_VDEF) { /* simply use vals */
1240 printval = im->gdes[vidx].vf.val;
1241 printtime = im->gdes[vidx].vf.when;
1242 } else { /* need to calculate max,min,avg etcetera */
1243 max_ii =((im->gdes[vidx].end
1244 - im->gdes[vidx].start)
1245 / im->gdes[vidx].step
1246 * im->gdes[vidx].ds_cnt);
1249 for( ii=im->gdes[vidx].ds;
1251 ii+=im->gdes[vidx].ds_cnt){
1252 if (! finite(im->gdes[vidx].data[ii]))
1254 if (isnan(printval)){
1255 printval = im->gdes[vidx].data[ii];
1260 switch (im->gdes[i].cf){
1263 case CF_DEVSEASONAL:
1267 printval += im->gdes[vidx].data[ii];
1270 printval = min( printval, im->gdes[vidx].data[ii]);
1274 printval = max( printval, im->gdes[vidx].data[ii]);
1277 printval = im->gdes[vidx].data[ii];
1280 if (im->gdes[i].cf==CF_AVERAGE || im->gdes[i].cf > CF_LAST) {
1281 if (validsteps > 1) {
1282 printval = (printval / validsteps);
1285 } /* prepare printval */
1287 if (!strcmp(im->gdes[i].format,"%c")) { /* VDEF time print */
1288 char ctime_buf[128]; /* PS: for ctime_r, must be >= 26 chars */
1289 if (im->gdes[i].gf == GF_PRINT){
1290 (*prdata)[prlines-2] = malloc((FMT_LEG_LEN+2)*sizeof(char));
1291 sprintf((*prdata)[prlines-2],"%s (%lu)",
1292 ctime_r(&printtime,ctime_buf),printtime);
1293 (*prdata)[prlines-1] = NULL;
1295 sprintf(im->gdes[i].legend,"%s (%lu)",
1296 ctime_r(&printtime,ctime_buf),printtime);
1300 if ((percent_s = strstr(im->gdes[i].format,"%S")) != NULL) {
1301 /* Magfact is set to -1 upon entry to print_calc. If it
1302 * is still less than 0, then we need to run auto_scale.
1303 * Otherwise, put the value into the correct units. If
1304 * the value is 0, then do not set the symbol or magnification
1305 * so next the calculation will be performed again. */
1306 if (magfact < 0.0) {
1307 auto_scale(im,&printval,&si_symb,&magfact);
1308 if (printval == 0.0)
1311 printval /= magfact;
1313 *(++percent_s) = 's';
1314 } else if (strstr(im->gdes[i].format,"%s") != NULL) {
1315 auto_scale(im,&printval,&si_symb,&magfact);
1318 if (im->gdes[i].gf == GF_PRINT){
1319 (*prdata)[prlines-2] = malloc((FMT_LEG_LEN+2)*sizeof(char));
1320 (*prdata)[prlines-1] = NULL;
1321 if (bad_format(im->gdes[i].format)) {
1322 rrd_set_error("bad format for [G]PRINT in '%s'", im->gdes[i].format);
1325 #ifdef HAVE_SNPRINTF
1326 snprintf((*prdata)[prlines-2],FMT_LEG_LEN,im->gdes[i].format,printval,si_symb);
1328 sprintf((*prdata)[prlines-2],im->gdes[i].format,printval,si_symb);
1333 if (bad_format(im->gdes[i].format)) {
1334 rrd_set_error("bad format for [G]PRINT in '%s'", im->gdes[i].format);
1337 #ifdef HAVE_SNPRINTF
1338 snprintf(im->gdes[i].legend,FMT_LEG_LEN-2,im->gdes[i].format,printval,si_symb);
1340 sprintf(im->gdes[i].legend,im->gdes[i].format,printval,si_symb);
1364 return graphelement;
1368 /* place legends with color spots */
1370 leg_place(image_desc_t *im)
1373 int interleg = im->text_prop[TEXT_PROP_LEGEND].size*2.0;
1374 int border = im->text_prop[TEXT_PROP_LEGEND].size*2.0;
1375 int fill=0, fill_last;
1377 int leg_x = border, leg_y = im->yimg;
1381 char prt_fctn; /*special printfunctions */
1384 if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
1385 if ((legspace = malloc(im->gdes_c*sizeof(int)))==NULL){
1386 rrd_set_error("malloc for legspace");
1390 for(i=0;i<im->gdes_c;i++){
1393 /* hid legends for rules which are not displayed */
1395 if(!(im->extra_flags & FORCE_RULES_LEGEND)) {
1396 if (im->gdes[i].gf == GF_HRULE &&
1397 (im->gdes[i].yrule < im->minval || im->gdes[i].yrule > im->maxval))
1398 im->gdes[i].legend[0] = '\0';
1400 if (im->gdes[i].gf == GF_VRULE &&
1401 (im->gdes[i].xrule < im->start || im->gdes[i].xrule > im->end))
1402 im->gdes[i].legend[0] = '\0';
1405 leg_cc = strlen(im->gdes[i].legend);
1407 /* is there a controle code ant the end of the legend string ? */
1408 /* and it is not a tab \\t */
1409 if (leg_cc >= 2 && im->gdes[i].legend[leg_cc-2] == '\\' && im->gdes[i].legend[leg_cc-1] != 't') {
1410 prt_fctn = im->gdes[i].legend[leg_cc-1];
1412 im->gdes[i].legend[leg_cc] = '\0';
1416 /* remove exess space */
1417 while (prt_fctn=='g' &&
1419 im->gdes[i].legend[leg_cc-1]==' '){
1421 im->gdes[i].legend[leg_cc]='\0';
1424 legspace[i]=(prt_fctn=='g' ? 0 : interleg);
1427 /* no interleg space if string ends in \g */
1428 fill += legspace[i];
1430 fill += gfx_get_text_width(im->canvas, fill+border,
1431 im->text_prop[TEXT_PROP_LEGEND].font,
1432 im->text_prop[TEXT_PROP_LEGEND].size,
1434 im->gdes[i].legend, 0);
1439 /* who said there was a special tag ... ?*/
1440 if (prt_fctn=='g') {
1443 if (prt_fctn == '\0') {
1444 if (i == im->gdes_c -1 ) prt_fctn ='l';
1446 /* is it time to place the legends ? */
1447 if (fill > im->ximg - 2*border){
1462 if (prt_fctn != '\0'){
1464 if (leg_c >= 2 && prt_fctn == 'j') {
1465 glue = (im->ximg - fill - 2* border) / (leg_c-1);
1469 if (prt_fctn =='c') leg_x = (im->ximg - fill) / 2.0;
1470 if (prt_fctn =='r') leg_x = im->ximg - fill - border;
1472 for(ii=mark;ii<=i;ii++){
1473 if(im->gdes[ii].legend[0]=='\0')
1475 im->gdes[ii].leg_x = leg_x;
1476 im->gdes[ii].leg_y = leg_y;
1478 gfx_get_text_width(im->canvas, leg_x,
1479 im->text_prop[TEXT_PROP_LEGEND].font,
1480 im->text_prop[TEXT_PROP_LEGEND].size,
1482 im->gdes[ii].legend, 0)
1486 leg_y += im->text_prop[TEXT_PROP_LEGEND].size*1.7;
1487 if (prt_fctn == 's') leg_y -= im->text_prop[TEXT_PROP_LEGEND].size;
1499 /* create a grid on the graph. it determines what to do
1500 from the values of xsize, start and end */
1502 /* the xaxis labels are determined from the number of seconds per pixel
1503 in the requested graph */
1508 calc_horizontal_grid(image_desc_t *im)
1514 int decimals, fractionals;
1516 im->ygrid_scale.labfact=2;
1518 range = im->maxval - im->minval;
1519 scaledrange = range / im->magfact;
1521 /* does the scale of this graph make it impossible to put lines
1522 on it? If so, give up. */
1523 if (isnan(scaledrange)) {
1527 /* find grid spaceing */
1529 if(isnan(im->ygridstep)){
1530 if(im->extra_flags & ALTYGRID) {
1531 /* find the value with max number of digits. Get number of digits */
1532 decimals = ceil(log10(max(fabs(im->maxval), fabs(im->minval))));
1533 if(decimals <= 0) /* everything is small. make place for zero */
1536 fractionals = floor(log10(range));
1537 if(fractionals < 0) /* small amplitude. */
1538 sprintf(im->ygrid_scale.labfmt, "%%%d.%df", decimals - fractionals + 1, -fractionals + 1);
1540 sprintf(im->ygrid_scale.labfmt, "%%%d.1f", decimals + 1);
1541 im->ygrid_scale.gridstep = pow((double)10, (double)fractionals);
1542 if(im->ygrid_scale.gridstep == 0) /* range is one -> 0.1 is reasonable scale */
1543 im->ygrid_scale.gridstep = 0.1;
1544 /* should have at least 5 lines but no more then 15 */
1545 if(range/im->ygrid_scale.gridstep < 5)
1546 im->ygrid_scale.gridstep /= 10;
1547 if(range/im->ygrid_scale.gridstep > 15)
1548 im->ygrid_scale.gridstep *= 10;
1549 if(range/im->ygrid_scale.gridstep > 5) {
1550 im->ygrid_scale.labfact = 1;
1551 if(range/im->ygrid_scale.gridstep > 8)
1552 im->ygrid_scale.labfact = 2;
1555 im->ygrid_scale.gridstep /= 5;
1556 im->ygrid_scale.labfact = 5;
1560 for(i=0;ylab[i].grid > 0;i++){
1561 pixel = im->ysize / (scaledrange / ylab[i].grid);
1562 if (gridind == -1 && pixel > 5) {
1569 if (pixel * ylab[gridind].lfac[i] >= 2 * im->text_prop[TEXT_PROP_AXIS].size) {
1570 im->ygrid_scale.labfact = ylab[gridind].lfac[i];
1575 im->ygrid_scale.gridstep = ylab[gridind].grid * im->magfact;
1578 im->ygrid_scale.gridstep = im->ygridstep;
1579 im->ygrid_scale.labfact = im->ylabfact;
1584 int draw_horizontal_grid(image_desc_t *im)
1588 char graph_label[100];
1589 double X0=im->xorigin;
1590 double X1=im->xorigin+im->xsize;
1592 int sgrid = (int)( im->minval / im->ygrid_scale.gridstep - 1);
1593 int egrid = (int)( im->maxval / im->ygrid_scale.gridstep + 1);
1594 scaledstep = im->ygrid_scale.gridstep/im->magfact;
1595 for (i = sgrid; i <= egrid; i++){
1596 double Y0=ytr(im,im->ygrid_scale.gridstep*i);
1597 if ( Y0 >= im->yorigin-im->ysize
1598 && Y0 <= im->yorigin){
1599 if(i % im->ygrid_scale.labfact == 0){
1600 if (i==0 || im->symbol == ' ') {
1602 if(im->extra_flags & ALTYGRID) {
1603 sprintf(graph_label,im->ygrid_scale.labfmt,scaledstep*i);
1606 sprintf(graph_label,"%4.1f",scaledstep*i);
1609 sprintf(graph_label,"%4.0f",scaledstep*i);
1613 sprintf(graph_label,"%4.1f %c",scaledstep*i, im->symbol);
1615 sprintf(graph_label,"%4.0f %c",scaledstep*i, im->symbol);
1619 gfx_new_text ( im->canvas,
1620 X0-im->text_prop[TEXT_PROP_AXIS].size/1.5, Y0,
1621 im->graph_col[GRC_FONT],
1622 im->text_prop[TEXT_PROP_AXIS].font,
1623 im->text_prop[TEXT_PROP_AXIS].size,
1624 im->tabwidth, 0.0, GFX_H_RIGHT, GFX_V_CENTER,
1626 gfx_new_dashed_line ( im->canvas,
1629 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1630 im->grid_dash_on, im->grid_dash_off);
1632 } else if (!(im->extra_flags & NOMINOR)) {
1633 gfx_new_dashed_line ( im->canvas,
1636 GRIDWIDTH, im->graph_col[GRC_GRID],
1637 im->grid_dash_on, im->grid_dash_off);
1645 /* logaritmic horizontal grid */
1647 horizontal_log_grid(image_desc_t *im)
1651 int minoridx=0, majoridx=0;
1652 char graph_label[100];
1654 double value, pixperstep, minstep;
1656 /* find grid spaceing */
1657 pixpex= (double)im->ysize / (log10(im->maxval) - log10(im->minval));
1659 if (isnan(pixpex)) {
1663 for(i=0;yloglab[i][0] > 0;i++){
1664 minstep = log10(yloglab[i][0]);
1665 for(ii=1;yloglab[i][ii+1] > 0;ii++){
1666 if(yloglab[i][ii+2]==0){
1667 minstep = log10(yloglab[i][ii+1])-log10(yloglab[i][ii]);
1671 pixperstep = pixpex * minstep;
1672 if(pixperstep > 5){minoridx = i;}
1673 if(pixperstep > 2 * im->text_prop[TEXT_PROP_LEGEND].size){majoridx = i;}
1677 X1=im->xorigin+im->xsize;
1678 /* paint minor grid */
1679 for (value = pow((double)10, log10(im->minval)
1680 - fmod(log10(im->minval),log10(yloglab[minoridx][0])));
1681 value <= im->maxval;
1682 value *= yloglab[minoridx][0]){
1683 if (value < im->minval) continue;
1685 while(yloglab[minoridx][++i] > 0){
1686 Y0 = ytr(im,value * yloglab[minoridx][i]);
1687 if (Y0 <= im->yorigin - im->ysize) break;
1688 gfx_new_dashed_line ( im->canvas,
1691 GRIDWIDTH, im->graph_col[GRC_GRID],
1692 im->grid_dash_on, im->grid_dash_off);
1696 /* paint major grid and labels*/
1697 for (value = pow((double)10, log10(im->minval)
1698 - fmod(log10(im->minval),log10(yloglab[majoridx][0])));
1699 value <= im->maxval;
1700 value *= yloglab[majoridx][0]){
1701 if (value < im->minval) continue;
1703 while(yloglab[majoridx][++i] > 0){
1704 Y0 = ytr(im,value * yloglab[majoridx][i]);
1705 if (Y0 <= im->yorigin - im->ysize) break;
1706 gfx_new_dashed_line ( im->canvas,
1709 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1710 im->grid_dash_on, im->grid_dash_off);
1712 sprintf(graph_label,"%3.0e",value * yloglab[majoridx][i]);
1713 gfx_new_text ( im->canvas,
1714 X0-im->text_prop[TEXT_PROP_AXIS].size/1.5, Y0,
1715 im->graph_col[GRC_FONT],
1716 im->text_prop[TEXT_PROP_AXIS].font,
1717 im->text_prop[TEXT_PROP_AXIS].size,
1718 im->tabwidth,0.0, GFX_H_RIGHT, GFX_V_CENTER,
1730 int xlab_sel; /* which sort of label and grid ? */
1731 time_t ti, tilab, timajor;
1733 char graph_label[100];
1734 double X0,Y0,Y1; /* points for filled graph and more*/
1737 /* the type of time grid is determined by finding
1738 the number of seconds per pixel in the graph */
1741 if(im->xlab_user.minsec == -1){
1742 factor=(im->end - im->start)/im->xsize;
1744 while ( xlab[xlab_sel+1].minsec != -1
1745 && xlab[xlab_sel+1].minsec <= factor){ xlab_sel++; }
1746 im->xlab_user.gridtm = xlab[xlab_sel].gridtm;
1747 im->xlab_user.gridst = xlab[xlab_sel].gridst;
1748 im->xlab_user.mgridtm = xlab[xlab_sel].mgridtm;
1749 im->xlab_user.mgridst = xlab[xlab_sel].mgridst;
1750 im->xlab_user.labtm = xlab[xlab_sel].labtm;
1751 im->xlab_user.labst = xlab[xlab_sel].labst;
1752 im->xlab_user.precis = xlab[xlab_sel].precis;
1753 im->xlab_user.stst = xlab[xlab_sel].stst;
1756 /* y coords are the same for every line ... */
1758 Y1 = im->yorigin-im->ysize;
1761 /* paint the minor grid */
1762 if (!(im->extra_flags & NOMINOR))
1764 for(ti = find_first_time(im->start,
1765 im->xlab_user.gridtm,
1766 im->xlab_user.gridst),
1767 timajor = find_first_time(im->start,
1768 im->xlab_user.mgridtm,
1769 im->xlab_user.mgridst);
1771 ti = find_next_time(ti,im->xlab_user.gridtm,im->xlab_user.gridst)
1773 /* are we inside the graph ? */
1774 if (ti < im->start || ti > im->end) continue;
1775 while (timajor < ti) {
1776 timajor = find_next_time(timajor,
1777 im->xlab_user.mgridtm, im->xlab_user.mgridst);
1779 if (ti == timajor) continue; /* skip as falls on major grid line */
1781 gfx_new_dashed_line(im->canvas,X0,Y0+1, X0,Y1-1,GRIDWIDTH,
1782 im->graph_col[GRC_GRID],
1783 im->grid_dash_on, im->grid_dash_off);
1788 /* paint the major grid */
1789 for(ti = find_first_time(im->start,
1790 im->xlab_user.mgridtm,
1791 im->xlab_user.mgridst);
1793 ti = find_next_time(ti,im->xlab_user.mgridtm,im->xlab_user.mgridst)
1795 /* are we inside the graph ? */
1796 if (ti < im->start || ti > im->end) continue;
1798 gfx_new_dashed_line(im->canvas,X0,Y0+3, X0,Y1-2,MGRIDWIDTH,
1799 im->graph_col[GRC_MGRID],
1800 im->grid_dash_on, im->grid_dash_off);
1803 /* paint the labels below the graph */
1804 for(ti = find_first_time(im->start,
1805 im->xlab_user.labtm,
1806 im->xlab_user.labst);
1808 ti = find_next_time(ti,im->xlab_user.labtm,im->xlab_user.labst)
1810 tilab= ti + im->xlab_user.precis/2; /* correct time for the label */
1811 /* are we inside the graph ? */
1812 if (ti < im->start || ti > im->end) continue;
1815 localtime_r(&tilab, &tm);
1816 strftime(graph_label,99,im->xlab_user.stst, &tm);
1818 # error "your libc has no strftime I guess we'll abort the exercise here."
1820 gfx_new_text ( im->canvas,
1821 xtr(im,tilab), Y0+im->text_prop[TEXT_PROP_AXIS].size/1.5,
1822 im->graph_col[GRC_FONT],
1823 im->text_prop[TEXT_PROP_AXIS].font,
1824 im->text_prop[TEXT_PROP_AXIS].size,
1825 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_TOP,
1838 /* draw x and y axis */
1839 /* gfx_new_line ( im->canvas, im->xorigin+im->xsize,im->yorigin,
1840 im->xorigin+im->xsize,im->yorigin-im->ysize,
1841 GRIDWIDTH, im->graph_col[GRC_AXIS]);
1843 gfx_new_line ( im->canvas, im->xorigin,im->yorigin-im->ysize,
1844 im->xorigin+im->xsize,im->yorigin-im->ysize,
1845 GRIDWIDTH, im->graph_col[GRC_AXIS]); */
1847 gfx_new_line ( im->canvas, im->xorigin-4,im->yorigin,
1848 im->xorigin+im->xsize+4,im->yorigin,
1849 MGRIDWIDTH, im->graph_col[GRC_AXIS]);
1851 gfx_new_line ( im->canvas, im->xorigin,im->yorigin+4,
1852 im->xorigin,im->yorigin-im->ysize-4,
1853 MGRIDWIDTH, im->graph_col[GRC_AXIS]);
1856 /* arrow for X axis direction */
1857 gfx_new_area ( im->canvas,
1858 im->xorigin+im->xsize+3, im->yorigin-3,
1859 im->xorigin+im->xsize+3, im->yorigin+4,
1860 im->xorigin+im->xsize+8, im->yorigin+0.5, /* LINEOFFSET */
1861 im->graph_col[GRC_ARROW]);
1866 grid_paint(image_desc_t *im)
1870 double X0,Y0; /* points for filled graph and more*/
1873 /* draw 3d border */
1874 node = gfx_new_area (im->canvas, 0,im->yimg,
1876 2,2,im->graph_col[GRC_SHADEA]);
1877 gfx_add_point( node , im->ximg - 2, 2 );
1878 gfx_add_point( node , im->ximg, 0 );
1879 gfx_add_point( node , 0,0 );
1880 /* gfx_add_point( node , 0,im->yimg ); */
1882 node = gfx_new_area (im->canvas, 2,im->yimg-2,
1883 im->ximg-2,im->yimg-2,
1885 im->graph_col[GRC_SHADEB]);
1886 gfx_add_point( node , im->ximg,0);
1887 gfx_add_point( node , im->ximg,im->yimg);
1888 gfx_add_point( node , 0,im->yimg);
1889 /* gfx_add_point( node , 0,im->yimg ); */
1892 if (im->draw_x_grid == 1 )
1895 if (im->draw_y_grid == 1){
1896 if(im->logarithmic){
1897 res = horizontal_log_grid(im);
1899 res = draw_horizontal_grid(im);
1902 /* dont draw horizontal grid if there is no min and max val */
1904 char *nodata = "No Data found";
1905 gfx_new_text(im->canvas,im->ximg/2, (2*im->yorigin-im->ysize) / 2,
1906 im->graph_col[GRC_FONT],
1907 im->text_prop[TEXT_PROP_AXIS].font,
1908 im->text_prop[TEXT_PROP_AXIS].size,
1909 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_CENTER,
1914 /* yaxis description */
1915 gfx_new_text( im->canvas,
1916 7, (im->yorigin - im->ysize/2),
1917 im->graph_col[GRC_FONT],
1918 im->text_prop[TEXT_PROP_AXIS].font,
1919 im->text_prop[TEXT_PROP_AXIS].size, im->tabwidth,
1920 RRDGRAPH_YLEGEND_ANGLE,
1921 GFX_H_LEFT, GFX_V_CENTER,
1925 gfx_new_text( im->canvas,
1926 im->ximg/2, im->text_prop[TEXT_PROP_TITLE].size,
1927 im->graph_col[GRC_FONT],
1928 im->text_prop[TEXT_PROP_TITLE].font,
1929 im->text_prop[TEXT_PROP_TITLE].size, im->tabwidth, 0.0,
1930 GFX_H_CENTER, GFX_V_CENTER,
1934 if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
1935 for(i=0;i<im->gdes_c;i++){
1936 if(im->gdes[i].legend[0] =='\0')
1939 /* im->gdes[i].leg_y is the bottom of the legend */
1940 X0 = im->gdes[i].leg_x;
1941 Y0 = im->gdes[i].leg_y;
1942 gfx_new_text ( im->canvas, X0, Y0,
1943 im->graph_col[GRC_FONT],
1944 im->text_prop[TEXT_PROP_LEGEND].font,
1945 im->text_prop[TEXT_PROP_LEGEND].size,
1946 im->tabwidth,0.0, GFX_H_LEFT, GFX_V_BOTTOM,
1947 im->gdes[i].legend );
1948 /* The legend for GRAPH items starts with "M " to have
1949 enough space for the box */
1950 if ( im->gdes[i].gf != GF_GPRINT
1951 && im->gdes[i].gf != GF_COMMENT) {
1954 boxH = gfx_get_text_width(im->canvas, 0,
1955 im->text_prop[TEXT_PROP_LEGEND].font,
1956 im->text_prop[TEXT_PROP_LEGEND].size,
1957 im->tabwidth,"M", 0);
1960 node = gfx_new_area(im->canvas,
1965 gfx_add_point ( node, X0+boxH, Y0-boxV );
1966 node = gfx_new_line(im->canvas,
1969 gfx_add_point(node,X0+boxH,Y0);
1970 gfx_add_point(node,X0+boxH,Y0-boxV);
1971 gfx_close_path(node);
1978 /*****************************************************
1979 * lazy check make sure we rely need to create this graph
1980 *****************************************************/
1982 int lazy_check(image_desc_t *im){
1985 struct stat imgstat;
1987 if (im->lazy == 0) return 0; /* no lazy option */
1988 if (stat(im->graphfile,&imgstat) != 0)
1989 return 0; /* can't stat */
1990 /* one pixel in the existing graph is more then what we would
1992 if (time(NULL) - imgstat.st_mtime >
1993 (im->end - im->start) / im->xsize)
1995 if ((fd = fopen(im->graphfile,"rb")) == NULL)
1996 return 0; /* the file does not exist */
1997 switch (im->canvas->imgformat) {
1999 size = PngSize(fd,&(im->ximg),&(im->yimg));
2009 pie_part(image_desc_t *im, gfx_color_t color,
2010 double PieCenterX, double PieCenterY, double Radius,
2011 double startangle, double endangle)
2015 double step=M_PI/50; /* Number of iterations for the circle;
2016 ** 10 is definitely too low, more than
2017 ** 50 seems to be overkill
2020 /* Strange but true: we have to work clockwise or else
2021 ** anti aliasing nor transparency don't work.
2023 ** This test is here to make sure we do it right, also
2024 ** this makes the for...next loop more easy to implement.
2025 ** The return will occur if the user enters a negative number
2026 ** (which shouldn't be done according to the specs) or if the
2027 ** programmers do something wrong (which, as we all know, never
2028 ** happens anyway :)
2030 if (endangle<startangle) return;
2032 /* Hidden feature: Radius decreases each full circle */
2034 while (angle>=2*M_PI) {
2039 node=gfx_new_area(im->canvas,
2040 PieCenterX+sin(startangle)*Radius,
2041 PieCenterY-cos(startangle)*Radius,
2044 PieCenterX+sin(endangle)*Radius,
2045 PieCenterY-cos(endangle)*Radius,
2047 for (angle=endangle;angle-startangle>=step;angle-=step) {
2049 PieCenterX+sin(angle)*Radius,
2050 PieCenterY-cos(angle)*Radius );
2055 graph_size_location(image_desc_t *im, int elements, int piechart )
2057 /* The actual size of the image to draw is determined from
2058 ** several sources. The size given on the command line is
2059 ** the graph area but we need more as we have to draw labels
2060 ** and other things outside the graph area
2063 /* +-+-------------------------------------------+
2064 ** |l|.................title.....................|
2065 ** |e+--+-------------------------------+--------+
2068 ** |l| l| main graph area | chart |
2071 ** |r+--+-------------------------------+--------+
2072 ** |e| | x-axis labels | |
2073 ** |v+--+-------------------------------+--------+
2074 ** | |..............legends......................|
2075 ** +-+-------------------------------------------+
2077 int Xvertical=0, Yvertical=0,
2078 Xtitle =0, Ytitle =0,
2079 Xylabel =0, Yylabel =0,
2082 Xxlabel =0, Yxlabel =0,
2084 Xlegend =0, Ylegend =0,
2086 Xspacing =10, Yspacing =10;
2088 if (im->extra_flags & ONLY_GRAPH) {
2092 if (im->ylegend[0] != '\0') {
2093 Xvertical = im->text_prop[TEXT_PROP_LEGEND].size *2;
2094 Yvertical = im->text_prop[TEXT_PROP_LEGEND].size * (strlen(im->ylegend)+1);
2098 if (im->title[0] != '\0') {
2099 /* The title is placed "inbetween" two text lines so it
2100 ** automatically has some vertical spacing. The horizontal
2101 ** spacing is added here, on each side.
2103 Xtitle = gfx_get_text_width(im->canvas, 0,
2104 im->text_prop[TEXT_PROP_TITLE].font,
2105 im->text_prop[TEXT_PROP_TITLE].size,
2107 im->title, 0) + 2*Xspacing;
2108 Ytitle = im->text_prop[TEXT_PROP_TITLE].size*2;
2114 if (im->draw_x_grid) {
2116 Yxlabel=im->text_prop[TEXT_PROP_LEGEND].size *2;
2118 if (im->draw_y_grid) {
2119 Xylabel=im->text_prop[TEXT_PROP_LEGEND].size *6;
2125 im->piesize=im->xsize<im->ysize?im->xsize:im->ysize;
2130 /* Now calculate the total size. Insert some spacing where
2131 desired. im->xorigin and im->yorigin need to correspond
2132 with the lower left corner of the main graph area or, if
2133 this one is not set, the imaginary box surrounding the
2136 /* The legend width cannot yet be determined, as a result we
2137 ** have problems adjusting the image to it. For now, we just
2138 ** forget about it at all; the legend will have to fit in the
2139 ** size already allocated.
2143 if ( !(im->extra_flags & ONLY_GRAPH) ) {
2144 im->ximg = Xylabel + Xmain + Xpie + 2 * Xspacing;
2147 if (Xmain) im->ximg += Xspacing;
2148 if (Xpie) im->ximg += Xspacing;
2150 if (im->extra_flags & ONLY_GRAPH) {
2153 im->xorigin = Xspacing + Xylabel;
2156 if (Xtitle > im->ximg) im->ximg = Xtitle;
2158 im->ximg += Xvertical;
2159 im->xorigin += Xvertical;
2163 /* The vertical size is interesting... we need to compare
2164 ** the sum of {Ytitle, Ymain, Yxlabel, Ylegend} with Yvertical
2165 ** however we need to know {Ytitle+Ymain+Yxlabel} in order to
2166 ** start even thinking about Ylegend.
2168 ** Do it in three portions: First calculate the inner part,
2169 ** then do the legend, then adjust the total height of the img.
2172 /* reserve space for main and/or pie */
2174 if (im->extra_flags & ONLY_GRAPH) {
2177 im->yimg = Ymain + Yxlabel;
2180 if (im->yimg < Ypie) im->yimg = Ypie;
2182 if (im->extra_flags & ONLY_GRAPH) {
2183 im->yorigin = im->yimg;
2185 im->yorigin = im->yimg - Yxlabel;
2188 /* reserve space for the title *or* some padding above the graph */
2191 im->yorigin += Ytitle;
2193 im->yimg += Yspacing;
2194 im->yorigin += Yspacing;
2196 /* reserve space for padding below the graph */
2197 im->yimg += Yspacing;
2200 /* Determine where to place the legends onto the image.
2201 ** Adjust im->yimg to match the space requirements.
2203 if(leg_place(im)==-1)
2206 /* last of three steps: check total height of image */
2207 if (im->yimg < Yvertical) im->yimg = Yvertical;
2210 if (Xlegend > im->ximg) {
2212 /* reposition Pie */
2216 /* The pie is placed in the upper right hand corner,
2217 ** just below the title (if any) and with sufficient
2221 im->pie_x = im->ximg - Xspacing - Xpie/2;
2222 im->pie_y = im->yorigin-Ymain+Ypie/2;
2224 im->pie_x = im->ximg/2;
2225 im->pie_y = im->yorigin-Ypie/2;
2231 /* draw that picture thing ... */
2233 graph_paint(image_desc_t *im, char ***calcpr)
2236 int lazy = lazy_check(im);
2238 double PieStart=0.0;
2242 double areazero = 0.0;
2243 enum gf_en stack_gf = GF_PRINT;
2244 graph_desc_t *lastgdes = NULL;
2246 /* if we are lazy and there is nothing to PRINT ... quit now */
2247 if (lazy && im->prt_c==0) return 0;
2249 /* pull the data from the rrd files ... */
2251 if(data_fetch(im)==-1)
2254 /* evaluate VDEF and CDEF operations ... */
2255 if(data_calc(im)==-1)
2258 /* check if we need to draw a piechart */
2259 for(i=0;i<im->gdes_c;i++){
2260 if (im->gdes[i].gf == GF_PART) {
2266 /* calculate and PRINT and GPRINT definitions. We have to do it at
2267 * this point because it will affect the length of the legends
2268 * if there are no graph elements we stop here ...
2269 * if we are lazy, try to quit ...
2271 i=print_calc(im,calcpr);
2273 if(((i==0)&&(piechart==0)) || lazy) return 0;
2275 /* If there's only the pie chart to draw, signal this */
2276 if (i==0) piechart=2;
2278 /* get actual drawing data and find min and max values*/
2279 if(data_proc(im)==-1)
2282 if(!im->logarithmic){si_unit(im);} /* identify si magnitude Kilo, Mega Giga ? */
2284 if(!im->rigid && ! im->logarithmic)
2285 expand_range(im); /* make sure the upper and lower limit are
2288 if (!calc_horizontal_grid(im))
2295 /**************************************************************
2296 *** Calculating sizes and locations became a bit confusing ***
2297 *** so I moved this into a separate function. ***
2298 **************************************************************/
2299 if(graph_size_location(im,i,piechart)==-1)
2302 /* the actual graph is created by going through the individual
2303 graph elements and then drawing them */
2305 node=gfx_new_area ( im->canvas,
2309 im->graph_col[GRC_BACK]);
2311 gfx_add_point(node,0, im->yimg);
2313 if (piechart != 2) {
2314 node=gfx_new_area ( im->canvas,
2315 im->xorigin, im->yorigin,
2316 im->xorigin + im->xsize, im->yorigin,
2317 im->xorigin + im->xsize, im->yorigin-im->ysize,
2318 im->graph_col[GRC_CANVAS]);
2320 gfx_add_point(node,im->xorigin, im->yorigin - im->ysize);
2322 if (im->minval > 0.0)
2323 areazero = im->minval;
2324 if (im->maxval < 0.0)
2325 areazero = im->maxval;
2329 pie_part(im,im->graph_col[GRC_CANVAS],im->pie_x,im->pie_y,im->piesize*0.5,0,2*M_PI);
2332 for(i=0;i<im->gdes_c;i++){
2333 switch(im->gdes[i].gf){
2346 for (ii = 0; ii < im->xsize; ii++)
2348 if (!isnan(im->gdes[i].p_data[ii]) &&
2349 im->gdes[i].p_data[ii] > 0.0)
2351 /* generate a tick */
2352 gfx_new_line(im->canvas, im -> xorigin + ii,
2353 im -> yorigin - (im -> gdes[i].yrule * im -> ysize),
2357 im -> gdes[i].col );
2363 stack_gf = im->gdes[i].gf;
2365 /* fix data points at oo and -oo */
2366 for(ii=0;ii<im->xsize;ii++){
2367 if (isinf(im->gdes[i].p_data[ii])){
2368 if (im->gdes[i].p_data[ii] > 0) {
2369 im->gdes[i].p_data[ii] = im->maxval ;
2371 im->gdes[i].p_data[ii] = im->minval ;
2377 if (im->gdes[i].col != 0x0){
2378 /* GF_LINE and friend */
2379 if(stack_gf == GF_LINE ){
2381 for(ii=1;ii<im->xsize;ii++){
2382 if ( ! isnan(im->gdes[i].p_data[ii-1])
2383 && ! isnan(im->gdes[i].p_data[ii])){
2385 node = gfx_new_line(im->canvas,
2386 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii-1]),
2387 ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]),
2388 im->gdes[i].linewidth,
2391 gfx_add_point(node,ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]));
2400 for(ii=1;ii<im->xsize;ii++){
2402 if ( ! isnan(im->gdes[i].p_data[ii-1])
2403 && ! isnan(im->gdes[i].p_data[ii])){
2407 if (im->gdes[i].gf == GF_STACK) {
2409 if ( (im->gdes[i].gf == GF_STACK)
2410 || (im->gdes[i].stack) ) {
2412 ybase = ytr(im,lastgdes->p_data[ii-1]);
2414 ybase = ytr(im,areazero);
2417 node = gfx_new_area(im->canvas,
2418 ii-1+im->xorigin,ybase,
2419 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii-1]),
2420 ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]),
2424 gfx_add_point(node,ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]));
2428 if ( node != NULL && (ii+1==im->xsize || isnan(im->gdes[i].p_data[ii]) )){
2429 /* GF_AREA STACK type*/
2431 if (im->gdes[i].gf == GF_STACK ) {
2433 if ( (im->gdes[i].gf == GF_STACK)
2434 || (im->gdes[i].stack) ) {
2436 for (iii=ii-1;iii>area_start;iii--){
2437 gfx_add_point(node,iii+im->xorigin,ytr(im,lastgdes->p_data[iii]));
2440 gfx_add_point(node,ii+im->xorigin,ytr(im,areazero));
2445 } /* else GF_LINE */
2446 } /* if color != 0x0 */
2447 /* make sure we do not run into trouble when stacking on NaN */
2448 for(ii=0;ii<im->xsize;ii++){
2449 if (isnan(im->gdes[i].p_data[ii])) {
2450 if (lastgdes && (im->gdes[i].gf == GF_STACK)) {
2451 im->gdes[i].p_data[ii] = lastgdes->p_data[ii];
2453 im->gdes[i].p_data[ii] = ytr(im,areazero);
2457 lastgdes = &(im->gdes[i]);
2460 if(isnan(im->gdes[i].yrule)) /* fetch variable */
2461 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2463 if (finite(im->gdes[i].yrule)) { /* even the fetched var can be NaN */
2464 pie_part(im,im->gdes[i].col,
2465 im->pie_x,im->pie_y,im->piesize*0.4,
2466 M_PI*2.0*PieStart/100.0,
2467 M_PI*2.0*(PieStart+im->gdes[i].yrule)/100.0);
2468 PieStart += im->gdes[i].yrule;
2478 if( !(im->extra_flags & ONLY_GRAPH) )
2481 /* grid_paint also does the text */
2482 if( !(im->extra_flags & ONLY_GRAPH) )
2485 /* the RULES are the last thing to paint ... */
2486 for(i=0;i<im->gdes_c;i++){
2488 switch(im->gdes[i].gf){
2490 if(isnan(im->gdes[i].yrule)) { /* fetch variable */
2491 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2493 if(im->gdes[i].yrule >= im->minval
2494 && im->gdes[i].yrule <= im->maxval)
2495 gfx_new_line(im->canvas,
2496 im->xorigin,ytr(im,im->gdes[i].yrule),
2497 im->xorigin+im->xsize,ytr(im,im->gdes[i].yrule),
2498 1.0,im->gdes[i].col);
2501 if(im->gdes[i].xrule == 0) { /* fetch variable */
2502 im->gdes[i].xrule = im->gdes[im->gdes[i].vidx].vf.when;
2504 if(im->gdes[i].xrule >= im->start
2505 && im->gdes[i].xrule <= im->end)
2506 gfx_new_line(im->canvas,
2507 xtr(im,im->gdes[i].xrule),im->yorigin,
2508 xtr(im,im->gdes[i].xrule),im->yorigin-im->ysize,
2509 1.0,im->gdes[i].col);
2517 if (strcmp(im->graphfile,"-")==0) {
2518 fo = im->graphhandle ? im->graphhandle : stdout;
2520 /* Change translation mode for stdout to BINARY */
2521 _setmode( _fileno( fo ), O_BINARY );
2524 if ((fo = fopen(im->graphfile,"wb")) == NULL) {
2525 rrd_set_error("Opening '%s' for write: %s",im->graphfile,
2526 rrd_strerror(errno));
2530 gfx_render (im->canvas,im->ximg,im->yimg,0x0,fo);
2531 if (strcmp(im->graphfile,"-") != 0)
2537 /*****************************************************
2539 *****************************************************/
2542 gdes_alloc(image_desc_t *im){
2545 if ((im->gdes = (graph_desc_t *) rrd_realloc(im->gdes, (im->gdes_c)
2546 * sizeof(graph_desc_t)))==NULL){
2547 rrd_set_error("realloc graph_descs");
2552 im->gdes[im->gdes_c-1].step=im->step;
2553 im->gdes[im->gdes_c-1].stack=0;
2554 im->gdes[im->gdes_c-1].debug=0;
2555 im->gdes[im->gdes_c-1].start=im->start;
2556 im->gdes[im->gdes_c-1].end=im->end;
2557 im->gdes[im->gdes_c-1].vname[0]='\0';
2558 im->gdes[im->gdes_c-1].data=NULL;
2559 im->gdes[im->gdes_c-1].ds_namv=NULL;
2560 im->gdes[im->gdes_c-1].data_first=0;
2561 im->gdes[im->gdes_c-1].p_data=NULL;
2562 im->gdes[im->gdes_c-1].rpnp=NULL;
2563 im->gdes[im->gdes_c-1].shift=0;
2564 im->gdes[im->gdes_c-1].col = 0x0;
2565 im->gdes[im->gdes_c-1].legend[0]='\0';
2566 im->gdes[im->gdes_c-1].rrd[0]='\0';
2567 im->gdes[im->gdes_c-1].ds=-1;
2568 im->gdes[im->gdes_c-1].p_data=NULL;
2569 im->gdes[im->gdes_c-1].yrule=DNAN;
2570 im->gdes[im->gdes_c-1].xrule=0;
2574 /* copies input untill the first unescaped colon is found
2575 or until input ends. backslashes have to be escaped as well */
2577 scan_for_col(char *input, int len, char *output)
2582 input[inp] != ':' &&
2585 if (input[inp] == '\\' &&
2586 input[inp+1] != '\0' &&
2587 (input[inp+1] == '\\' ||
2588 input[inp+1] == ':')){
2589 output[outp++] = input[++inp];
2592 output[outp++] = input[inp];
2595 output[outp] = '\0';
2598 /* Some surgery done on this function, it became ridiculously big.
2600 ** - initializing now in rrd_graph_init()
2601 ** - options parsing now in rrd_graph_options()
2602 ** - script parsing now in rrd_graph_script()
2605 rrd_graph(int argc, char **argv, char ***prdata, int *xsize, int *ysize, FILE *stream, double *ymin, double *ymax)
2609 rrd_graph_init(&im);
2610 im.graphhandle = stream;
2612 rrd_graph_options(argc,argv,&im);
2613 if (rrd_test_error()) {
2618 if (strlen(argv[optind])>=MAXPATH) {
2619 rrd_set_error("filename (including path) too long");
2623 strncpy(im.graphfile,argv[optind],MAXPATH-1);
2624 im.graphfile[MAXPATH-1]='\0';
2626 rrd_graph_script(argc,argv,&im,1);
2627 if (rrd_test_error()) {
2632 /* Everything is now read and the actual work can start */
2635 if (graph_paint(&im,prdata)==-1){
2640 /* The image is generated and needs to be output.
2641 ** Also, if needed, print a line with information about the image.
2651 /* maybe prdata is not allocated yet ... lets do it now */
2652 if ((*prdata = calloc(2,sizeof(char *)))==NULL) {
2653 rrd_set_error("malloc imginfo");
2657 if(((*prdata)[0] = malloc((strlen(im.imginfo)+200+strlen(im.graphfile))*sizeof(char)))
2659 rrd_set_error("malloc imginfo");
2662 filename=im.graphfile+strlen(im.graphfile);
2663 while(filename > im.graphfile) {
2664 if (*(filename-1)=='/' || *(filename-1)=='\\' ) break;
2668 sprintf((*prdata)[0],im.imginfo,filename,(long)(im.canvas->zoom*im.ximg),(long)(im.canvas->zoom*im.yimg));
2675 rrd_graph_init(image_desc_t *im)
2682 #ifdef HAVE_SETLOCALE
2683 setlocale(LC_TIME,"");
2686 im->xlab_user.minsec = -1;
2692 im->ylegend[0] = '\0';
2693 im->title[0] = '\0';
2696 im->unitsexponent= 9999;
2702 im->logarithmic = 0;
2703 im->ygridstep = DNAN;
2704 im->draw_x_grid = 1;
2705 im->draw_y_grid = 1;
2710 im->canvas = gfx_new_canvas();
2711 im->grid_dash_on = 1;
2712 im->grid_dash_off = 1;
2713 im->tabwidth = 40.0;
2715 for(i=0;i<DIM(graph_col);i++)
2716 im->graph_col[i]=graph_col[i];
2720 windir = getenv("windir");
2721 /* %windir% is something like D:\windows or C:\winnt */
2722 if (windir != NULL) {
2723 strcpy(rrd_win_default_font,windir);
2724 strcat(rrd_win_default_font,"\\fonts\\cour.ttf");
2725 for(i=0;i<DIM(text_prop);i++)
2726 text_prop[i].font = rrd_win_default_font;
2730 for(i=0;i<DIM(text_prop);i++){
2731 im->text_prop[i].size = text_prop[i].size;
2732 im->text_prop[i].font = text_prop[i].font;
2737 rrd_graph_options(int argc, char *argv[],image_desc_t *im)
2740 char *parsetime_error = NULL;
2741 char scan_gtm[12],scan_mtm[12],scan_ltm[12],col_nam[12];
2742 time_t start_tmp=0,end_tmp=0;
2744 struct rrd_time_value start_tv, end_tv;
2747 parsetime("end-24h", &start_tv);
2748 parsetime("now", &end_tv);
2751 static struct option long_options[] =
2753 {"start", required_argument, 0, 's'},
2754 {"end", required_argument, 0, 'e'},
2755 {"x-grid", required_argument, 0, 'x'},
2756 {"y-grid", required_argument, 0, 'y'},
2757 {"vertical-label",required_argument,0,'v'},
2758 {"width", required_argument, 0, 'w'},
2759 {"height", required_argument, 0, 'h'},
2760 {"interlaced", no_argument, 0, 'i'},
2761 {"upper-limit",required_argument, 0, 'u'},
2762 {"lower-limit",required_argument, 0, 'l'},
2763 {"rigid", no_argument, 0, 'r'},
2764 {"base", required_argument, 0, 'b'},
2765 {"logarithmic",no_argument, 0, 'o'},
2766 {"color", required_argument, 0, 'c'},
2767 {"font", required_argument, 0, 'n'},
2768 {"title", required_argument, 0, 't'},
2769 {"imginfo", required_argument, 0, 'f'},
2770 {"imgformat", required_argument, 0, 'a'},
2771 {"lazy", no_argument, 0, 'z'},
2772 {"zoom", required_argument, 0, 'm'},
2773 {"no-legend", no_argument, 0, 'g'},
2774 {"force-rules-legend",no_argument,0, 'F'},
2775 {"only-graph", no_argument, 0, 'j'},
2776 {"alt-y-grid", no_argument, 0, 'Y'},
2777 {"no-minor", no_argument, 0, 'I'},
2778 {"alt-autoscale", no_argument, 0, 'A'},
2779 {"alt-autoscale-max", no_argument, 0, 'M'},
2780 {"units-exponent",required_argument, 0, 'X'},
2781 {"step", required_argument, 0, 'S'},
2782 {"tabwidth", required_argument, 0, 'T'},
2783 {"no-gridfit", no_argument, 0, 'N'},
2785 int option_index = 0;
2789 opt = getopt_long(argc, argv,
2790 "s:e:x:y:v:w:h:iu:l:rb:oc:n:m:t:f:a:I:zgjFYAMX:S:NT:",
2791 long_options, &option_index);
2798 im->extra_flags |= NOMINOR;
2801 im->extra_flags |= ALTYGRID;
2804 im->extra_flags |= ALTAUTOSCALE;
2807 im->extra_flags |= ALTAUTOSCALE_MAX;
2810 im->extra_flags |= ONLY_GRAPH;
2813 im->extra_flags |= NOLEGEND;
2816 im->extra_flags |= FORCE_RULES_LEGEND;
2819 im->unitsexponent = atoi(optarg);
2822 im->tabwidth = atof(optarg);
2825 im->step = atoi(optarg);
2831 if ((parsetime_error = parsetime(optarg, &start_tv))) {
2832 rrd_set_error( "start time: %s", parsetime_error );
2837 if ((parsetime_error = parsetime(optarg, &end_tv))) {
2838 rrd_set_error( "end time: %s", parsetime_error );
2843 if(strcmp(optarg,"none") == 0){
2849 "%10[A-Z]:%ld:%10[A-Z]:%ld:%10[A-Z]:%ld:%ld:%n",
2851 &im->xlab_user.gridst,
2853 &im->xlab_user.mgridst,
2855 &im->xlab_user.labst,
2856 &im->xlab_user.precis,
2857 &stroff) == 7 && stroff != 0){
2858 strncpy(im->xlab_form, optarg+stroff, sizeof(im->xlab_form) - 1);
2859 if((int)(im->xlab_user.gridtm = tmt_conv(scan_gtm)) == -1){
2860 rrd_set_error("unknown keyword %s",scan_gtm);
2862 } else if ((int)(im->xlab_user.mgridtm = tmt_conv(scan_mtm)) == -1){
2863 rrd_set_error("unknown keyword %s",scan_mtm);
2865 } else if ((int)(im->xlab_user.labtm = tmt_conv(scan_ltm)) == -1){
2866 rrd_set_error("unknown keyword %s",scan_ltm);
2869 im->xlab_user.minsec = 1;
2870 im->xlab_user.stst = im->xlab_form;
2872 rrd_set_error("invalid x-grid format");
2878 if(strcmp(optarg,"none") == 0){
2886 &im->ylabfact) == 2) {
2887 if(im->ygridstep<=0){
2888 rrd_set_error("grid step must be > 0");
2890 } else if (im->ylabfact < 1){
2891 rrd_set_error("label factor must be > 0");
2895 rrd_set_error("invalid y-grid format");
2900 strncpy(im->ylegend,optarg,150);
2901 im->ylegend[150]='\0';
2904 im->maxval = atof(optarg);
2907 im->minval = atof(optarg);
2910 im->base = atol(optarg);
2911 if(im->base != 1024 && im->base != 1000 ){
2912 rrd_set_error("the only sensible value for base apart from 1000 is 1024");
2917 long_tmp = atol(optarg);
2918 if (long_tmp < 10) {
2919 rrd_set_error("width below 10 pixels");
2922 im->xsize = long_tmp;
2925 long_tmp = atol(optarg);
2926 if (long_tmp < 10) {
2927 rrd_set_error("height below 10 pixels");
2930 im->ysize = long_tmp;
2933 im->canvas->interlaced = 1;
2939 im->imginfo = optarg;
2942 if((int)(im->canvas->imgformat = if_conv(optarg)) == -1) {
2943 rrd_set_error("unsupported graphics format '%s'",optarg);
2951 im->logarithmic = 1;
2952 if (isnan(im->minval))
2958 col_nam,&color) == 2){
2960 if((ci=grc_conv(col_nam)) != -1){
2961 im->graph_col[ci]=color;
2963 rrd_set_error("invalid color name '%s'",col_nam);
2966 rrd_set_error("invalid color def format");
2971 /* originally this used char *prop = "" and
2972 ** char *font = "dummy" however this results
2973 ** in a SEG fault, at least on RH7.1
2975 ** The current implementation isn't proper
2976 ** either, font is never freed and prop uses
2977 ** a fixed width string
2986 prop,&size,font) == 3){
2988 if((sindex=text_prop_conv(prop)) != -1){
2989 im->text_prop[sindex].size=size;
2990 im->text_prop[sindex].font=font;
2991 if (sindex==0) { /* the default */
2992 im->text_prop[TEXT_PROP_TITLE].size=size;
2993 im->text_prop[TEXT_PROP_TITLE].font=font;
2994 im->text_prop[TEXT_PROP_AXIS].size=size;
2995 im->text_prop[TEXT_PROP_AXIS].font=font;
2996 im->text_prop[TEXT_PROP_UNIT].size=size;
2997 im->text_prop[TEXT_PROP_UNIT].font=font;
2998 im->text_prop[TEXT_PROP_LEGEND].size=size;
2999 im->text_prop[TEXT_PROP_LEGEND].font=font;
3002 rrd_set_error("invalid fonttag '%s'",prop);
3006 rrd_set_error("invalid text property format");
3012 im->canvas->zoom = atof(optarg);
3013 if (im->canvas->zoom <= 0.0) {
3014 rrd_set_error("zoom factor must be > 0");
3019 strncpy(im->title,optarg,150);
3020 im->title[150]='\0';
3025 rrd_set_error("unknown option '%c'", optopt);
3027 rrd_set_error("unknown option '%s'",argv[optind-1]);
3032 if (optind >= argc) {
3033 rrd_set_error("missing filename");
3037 if (im->logarithmic == 1 && (im->minval <= 0 || isnan(im->minval))){
3038 rrd_set_error("for a logarithmic yaxis you must specify a lower-limit > 0");
3042 if (proc_start_end(&start_tv,&end_tv,&start_tmp,&end_tmp) == -1){
3043 /* error string is set in parsetime.c */
3047 if (start_tmp < 3600*24*365*10){
3048 rrd_set_error("the first entry to fetch should be after 1980 (%ld)",start_tmp);
3052 if (end_tmp < start_tmp) {
3053 rrd_set_error("start (%ld) should be less than end (%ld)",
3054 start_tmp, end_tmp);
3058 im->start = start_tmp;
3060 im->step = max((long)im->step, (im->end-im->start)/im->xsize);
3064 rrd_graph_check_vname(image_desc_t *im, char *varname, char *err)
3066 if ((im->gdes[im->gdes_c-1].vidx=find_var(im,varname))==-1) {
3067 rrd_set_error("Unknown variable '%s' in %s",varname,err);
3073 rrd_graph_color(image_desc_t *im, char *var, char *err, int optional)
3076 graph_desc_t *gdp=&im->gdes[im->gdes_c-1];
3078 color=strstr(var,"#");
3081 rrd_set_error("Found no color in %s",err);
3090 rest=strstr(color,":");
3098 sscanf(color,"#%6lx%n",&col,&n);
3099 col = (col << 8) + 0xff /* shift left by 8 */;
3100 if (n!=7) rrd_set_error("Color problem in %s",err);
3103 sscanf(color,"#%8lx%n",&col,&n);
3106 rrd_set_error("Color problem in %s",err);
3108 if (rrd_test_error()) return 0;
3114 rrd_graph_legend(graph_desc_t *gdp, char *line)
3118 i=scan_for_col(line,FMT_LEG_LEN,gdp->legend);
3120 return (strlen(&line[i])==0);
3124 int bad_format(char *fmt) {
3128 while (*ptr != '\0')
3129 if (*ptr++ == '%') {
3131 /* line cannot end with percent char */
3132 if (*ptr == '\0') return 1;
3134 /* '%s', '%S' and '%%' are allowed */
3135 if (*ptr == 's' || *ptr == 'S' || *ptr == '%') ptr++;
3137 /* or else '% 6.2lf' and such are allowed */
3140 /* optional padding character */
3141 if (*ptr == ' ' || *ptr == '+' || *ptr == '-') ptr++;
3143 /* This should take care of 'm.n' with all three optional */
3144 while (*ptr >= '0' && *ptr <= '9') ptr++;
3145 if (*ptr == '.') ptr++;
3146 while (*ptr >= '0' && *ptr <= '9') ptr++;
3148 /* Either 'le', 'lf' or 'lg' must follow here */
3149 if (*ptr++ != 'l') return 1;
3150 if (*ptr == 'e' || *ptr == 'f' || *ptr == 'g') ptr++;
3161 vdef_parse(gdes,str)
3162 struct graph_desc_t *gdes;
3165 /* A VDEF currently is either "func" or "param,func"
3166 * so the parsing is rather simple. Change if needed.
3173 sscanf(str,"%le,%29[A-Z]%n",¶m,func,&n);
3174 if (n== (int)strlen(str)) { /* matched */
3178 sscanf(str,"%29[A-Z]%n",func,&n);
3179 if (n== (int)strlen(str)) { /* matched */
3182 rrd_set_error("Unknown function string '%s' in VDEF '%s'"
3189 if (!strcmp("PERCENT",func)) gdes->vf.op = VDEF_PERCENT;
3190 else if (!strcmp("MAXIMUM",func)) gdes->vf.op = VDEF_MAXIMUM;
3191 else if (!strcmp("AVERAGE",func)) gdes->vf.op = VDEF_AVERAGE;
3192 else if (!strcmp("MINIMUM",func)) gdes->vf.op = VDEF_MINIMUM;
3193 else if (!strcmp("TOTAL", func)) gdes->vf.op = VDEF_TOTAL;
3194 else if (!strcmp("FIRST", func)) gdes->vf.op = VDEF_FIRST;
3195 else if (!strcmp("LAST", func)) gdes->vf.op = VDEF_LAST;
3197 rrd_set_error("Unknown function '%s' in VDEF '%s'\n"
3204 switch (gdes->vf.op) {
3206 if (isnan(param)) { /* no parameter given */
3207 rrd_set_error("Function '%s' needs parameter in VDEF '%s'\n"
3213 if (param>=0.0 && param<=100.0) {
3214 gdes->vf.param = param;
3215 gdes->vf.val = DNAN; /* undefined */
3216 gdes->vf.when = 0; /* undefined */
3218 rrd_set_error("Parameter '%f' out of range in VDEF '%s'\n"
3232 gdes->vf.param = DNAN;
3233 gdes->vf.val = DNAN;
3236 rrd_set_error("Function '%s' needs no parameter in VDEF '%s'\n"
3253 graph_desc_t *src,*dst;
3257 dst = &im->gdes[gdi];
3258 src = &im->gdes[dst->vidx];
3259 data = src->data + src->ds;
3260 steps = (src->end - src->start) / src->step;
3263 printf("DEBUG: start == %lu, end == %lu, %lu steps\n"
3270 switch (dst->vf.op) {
3271 case VDEF_PERCENT: {
3272 rrd_value_t * array;
3276 if ((array = malloc(steps*sizeof(double)))==NULL) {
3277 rrd_set_error("malloc VDEV_PERCENT");
3280 for (step=0;step < steps; step++) {
3281 array[step]=data[step*src->ds_cnt];
3283 qsort(array,step,sizeof(double),vdef_percent_compar);
3285 field = (steps-1)*dst->vf.param/100;
3286 dst->vf.val = array[field];
3287 dst->vf.when = 0; /* no time component */
3290 for(step=0;step<steps;step++)
3291 printf("DEBUG: %3li:%10.2f %c\n",step,array[step],step==field?'*':' ');
3297 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3298 if (step == steps) {
3302 dst->vf.val = data[step*src->ds_cnt];
3303 dst->vf.when = src->start + (step+1)*src->step;
3305 while (step != steps) {
3306 if (finite(data[step*src->ds_cnt])) {
3307 if (data[step*src->ds_cnt] > dst->vf.val) {
3308 dst->vf.val = data[step*src->ds_cnt];
3309 dst->vf.when = src->start + (step+1)*src->step;
3316 case VDEF_AVERAGE: {
3319 for (step=0;step<steps;step++) {
3320 if (finite(data[step*src->ds_cnt])) {
3321 sum += data[step*src->ds_cnt];
3326 if (dst->vf.op == VDEF_TOTAL) {
3327 dst->vf.val = sum*src->step;
3328 dst->vf.when = cnt*src->step; /* not really "when" */
3330 dst->vf.val = sum/cnt;
3331 dst->vf.when = 0; /* no time component */
3341 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3342 if (step == steps) {
3346 dst->vf.val = data[step*src->ds_cnt];
3347 dst->vf.when = src->start + (step+1)*src->step;
3349 while (step != steps) {
3350 if (finite(data[step*src->ds_cnt])) {
3351 if (data[step*src->ds_cnt] < dst->vf.val) {
3352 dst->vf.val = data[step*src->ds_cnt];
3353 dst->vf.when = src->start + (step+1)*src->step;
3360 /* The time value returned here is one step before the
3361 * actual time value. This is the start of the first
3365 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3366 if (step == steps) { /* all entries were NaN */
3370 dst->vf.val = data[step*src->ds_cnt];
3371 dst->vf.when = src->start + step*src->step;
3375 /* The time value returned here is the
3376 * actual time value. This is the end of the last
3380 while (step >= 0 && isnan(data[step*src->ds_cnt])) step--;
3381 if (step < 0) { /* all entries were NaN */
3385 dst->vf.val = data[step*src->ds_cnt];
3386 dst->vf.when = src->start + (step+1)*src->step;
3393 /* NaN < -INF < finite_values < INF */
3395 vdef_percent_compar(a,b)
3398 /* Equality is not returned; this doesn't hurt except
3399 * (maybe) for a little performance.
3402 /* First catch NaN values. They are smallest */
3403 if (isnan( *(double *)a )) return -1;
3404 if (isnan( *(double *)b )) return 1;
3406 /* NaN doesn't reach this part so INF and -INF are extremes.
3407 * The sign from isinf() is compatible with the sign we return
3409 if (isinf( *(double *)a )) return isinf( *(double *)a );
3410 if (isinf( *(double *)b )) return isinf( *(double *)b );
3412 /* If we reach this, both values must be finite */
3413 if ( *(double *)a < *(double *)b ) return -1; else return 1;