1 /****************************************************************************
2 * RRDtool 1.2rc2 Copyright by Tobi 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 { 9.0, RRD_DEFAULT_FONT }, /* default */
41 { 11.0, RRD_DEFAULT_FONT }, /* title */
42 { 8.0, RRD_DEFAULT_FONT }, /* axis */
43 { 9.0, RRD_DEFAULT_FONT }, /* unit */
44 { 9.0, 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)
187 conv_if(PART,GF_PART)
189 conv_if(XPORT,GF_XPORT)
190 conv_if(SHIFT,GF_SHIFT)
195 enum gfx_if_en if_conv(char *string){
205 enum tmt_en tmt_conv(char *string){
207 conv_if(SECOND,TMT_SECOND)
208 conv_if(MINUTE,TMT_MINUTE)
209 conv_if(HOUR,TMT_HOUR)
211 conv_if(WEEK,TMT_WEEK)
212 conv_if(MONTH,TMT_MONTH)
213 conv_if(YEAR,TMT_YEAR)
217 enum grc_en grc_conv(char *string){
219 conv_if(BACK,GRC_BACK)
220 conv_if(CANVAS,GRC_CANVAS)
221 conv_if(SHADEA,GRC_SHADEA)
222 conv_if(SHADEB,GRC_SHADEB)
223 conv_if(GRID,GRC_GRID)
224 conv_if(MGRID,GRC_MGRID)
225 conv_if(FONT,GRC_FONT)
226 conv_if(ARROW,GRC_ARROW)
227 conv_if(AXIS,GRC_AXIS)
232 enum text_prop_en text_prop_conv(char *string){
234 conv_if(DEFAULT,TEXT_PROP_DEFAULT)
235 conv_if(TITLE,TEXT_PROP_TITLE)
236 conv_if(AXIS,TEXT_PROP_AXIS)
237 conv_if(UNIT,TEXT_PROP_UNIT)
238 conv_if(LEGEND,TEXT_PROP_LEGEND)
246 im_free(image_desc_t *im)
250 if (im == NULL) return 0;
251 for(i=0;i<(unsigned)im->gdes_c;i++){
252 if (im->gdes[i].data_first){
253 /* careful here, because a single pointer can occur several times */
254 free (im->gdes[i].data);
255 if (im->gdes[i].ds_namv){
256 for (ii=0;ii<im->gdes[i].ds_cnt;ii++)
257 free(im->gdes[i].ds_namv[ii]);
258 free(im->gdes[i].ds_namv);
261 free (im->gdes[i].p_data);
262 free (im->gdes[i].rpnp);
265 gfx_destroy(im->canvas);
269 /* find SI magnitude symbol for the given number*/
272 image_desc_t *im, /* image description */
279 char *symbol[] = {"a", /* 10e-18 Atto */
280 "f", /* 10e-15 Femto */
281 "p", /* 10e-12 Pico */
282 "n", /* 10e-9 Nano */
283 "u", /* 10e-6 Micro */
284 "m", /* 10e-3 Milli */
289 "T", /* 10e12 Tera */
290 "P", /* 10e15 Peta */
296 if (*value == 0.0 || isnan(*value) ) {
300 sindex = floor(log(fabs(*value))/log((double)im->base));
301 *magfact = pow((double)im->base, (double)sindex);
302 (*value) /= (*magfact);
304 if ( sindex <= symbcenter && sindex >= -symbcenter) {
305 (*symb_ptr) = symbol[sindex+symbcenter];
313 /* find SI magnitude symbol for the numbers on the y-axis*/
316 image_desc_t *im /* image description */
320 char symbol[] = {'a', /* 10e-18 Atto */
321 'f', /* 10e-15 Femto */
322 'p', /* 10e-12 Pico */
323 'n', /* 10e-9 Nano */
324 'u', /* 10e-6 Micro */
325 'm', /* 10e-3 Milli */
330 'T', /* 10e12 Tera */
331 'P', /* 10e15 Peta */
337 if (im->unitsexponent != 9999) {
338 /* unitsexponent = 9, 6, 3, 0, -3, -6, -9, etc */
339 digits = floor(im->unitsexponent / 3);
341 digits = floor( log( max( fabs(im->minval),fabs(im->maxval)))/log((double)im->base));
343 im->magfact = pow((double)im->base , digits);
346 printf("digits %6.3f im->magfact %6.3f\n",digits,im->magfact);
349 if ( ((digits+symbcenter) < sizeof(symbol)) &&
350 ((digits+symbcenter) >= 0) )
351 im->symbol = symbol[(int)digits+symbcenter];
356 /* move min and max values around to become sensible */
359 expand_range(image_desc_t *im)
361 double sensiblevalues[] ={1000.0,900.0,800.0,750.0,700.0,
362 600.0,500.0,400.0,300.0,250.0,
363 200.0,125.0,100.0,90.0,80.0,
364 75.0,70.0,60.0,50.0,40.0,30.0,
365 25.0,20.0,10.0,9.0,8.0,
366 7.0,6.0,5.0,4.0,3.5,3.0,
367 2.5,2.0,1.8,1.5,1.2,1.0,
368 0.8,0.7,0.6,0.5,0.4,0.3,0.2,0.1,0.0,-1};
370 double scaled_min,scaled_max;
377 printf("Min: %6.2f Max: %6.2f MagFactor: %6.2f\n",
378 im->minval,im->maxval,im->magfact);
381 if (isnan(im->ygridstep)){
382 if(im->extra_flags & ALTAUTOSCALE) {
383 /* measure the amplitude of the function. Make sure that
384 graph boundaries are slightly higher then max/min vals
385 so we can see amplitude on the graph */
388 delt = im->maxval - im->minval;
390 fact = 2.0 * pow(10.0,
391 floor(log10(max(fabs(im->minval), fabs(im->maxval)))) - 2);
393 adj = (fact - delt) * 0.55;
395 printf("Min: %6.2f Max: %6.2f delt: %6.2f fact: %6.2f adj: %6.2f\n", im->minval, im->maxval, delt, fact, adj);
401 else if(im->extra_flags & ALTAUTOSCALE_MAX) {
402 /* measure the amplitude of the function. Make sure that
403 graph boundaries are slightly higher than max vals
404 so we can see amplitude on the graph */
405 adj = (im->maxval - im->minval) * 0.1;
409 scaled_min = im->minval / im->magfact;
410 scaled_max = im->maxval / im->magfact;
412 for (i=1; sensiblevalues[i] > 0; i++){
413 if (sensiblevalues[i-1]>=scaled_min &&
414 sensiblevalues[i]<=scaled_min)
415 im->minval = sensiblevalues[i]*(im->magfact);
417 if (-sensiblevalues[i-1]<=scaled_min &&
418 -sensiblevalues[i]>=scaled_min)
419 im->minval = -sensiblevalues[i-1]*(im->magfact);
421 if (sensiblevalues[i-1] >= scaled_max &&
422 sensiblevalues[i] <= scaled_max)
423 im->maxval = sensiblevalues[i-1]*(im->magfact);
425 if (-sensiblevalues[i-1]<=scaled_max &&
426 -sensiblevalues[i] >=scaled_max)
427 im->maxval = -sensiblevalues[i]*(im->magfact);
431 /* adjust min and max to the grid definition if there is one */
432 im->minval = (double)im->ylabfact * im->ygridstep *
433 floor(im->minval / ((double)im->ylabfact * im->ygridstep));
434 im->maxval = (double)im->ylabfact * im->ygridstep *
435 ceil(im->maxval /( (double)im->ylabfact * im->ygridstep));
439 fprintf(stderr,"SCALED Min: %6.2f Max: %6.2f Factor: %6.2f\n",
440 im->minval,im->maxval,im->magfact);
445 apply_gridfit(image_desc_t *im)
447 if (isnan(im->minval) || isnan(im->maxval))
450 if (im->logarithmic) {
451 double ya, yb, ypix, ypixfrac;
452 double log10_range = log10(im->maxval) - log10(im->minval);
453 ya = pow((double)10, floor(log10(im->minval)));
454 while (ya < im->minval)
457 return; /* don't have y=10^x gridline */
459 if (yb <= im->maxval) {
460 /* we have at least 2 y=10^x gridlines.
461 Make sure distance between them in pixels
462 are an integer by expanding im->maxval */
463 double y_pixel_delta = ytr(im, ya) - ytr(im, yb);
464 double factor = y_pixel_delta / floor(y_pixel_delta);
465 double new_log10_range = factor * log10_range;
466 double new_ymax_log10 = log10(im->minval) + new_log10_range;
467 im->maxval = pow(10, new_ymax_log10);
468 ytr(im, DNAN); /* reset precalc */
469 log10_range = log10(im->maxval) - log10(im->minval);
471 /* make sure first y=10^x gridline is located on
472 integer pixel position by moving scale slightly
473 downwards (sub-pixel movement) */
474 ypix = ytr(im, ya) + im->ysize; /* add im->ysize so it always is positive */
475 ypixfrac = ypix - floor(ypix);
476 if (ypixfrac > 0 && ypixfrac < 1) {
477 double yfrac = ypixfrac / im->ysize;
478 im->minval = pow(10, log10(im->minval) - yfrac * log10_range);
479 im->maxval = pow(10, log10(im->maxval) - yfrac * log10_range);
480 ytr(im, DNAN); /* reset precalc */
483 /* Make sure we have an integer pixel distance between
484 each minor gridline */
485 double ypos1 = ytr(im, im->minval);
486 double ypos2 = ytr(im, im->minval + im->ygrid_scale.gridstep);
487 double y_pixel_delta = ypos1 - ypos2;
488 double factor = y_pixel_delta / floor(y_pixel_delta);
489 double new_range = factor * (im->maxval - im->minval);
490 double gridstep = im->ygrid_scale.gridstep;
491 double minor_y, minor_y_px, minor_y_px_frac;
492 im->maxval = im->minval + new_range;
493 ytr(im, DNAN); /* reset precalc */
494 /* make sure first minor gridline is on integer pixel y coord */
495 minor_y = gridstep * floor(im->minval / gridstep);
496 while (minor_y < im->minval)
498 minor_y_px = ytr(im, minor_y) + im->ysize; /* ensure > 0 by adding ysize */
499 minor_y_px_frac = minor_y_px - floor(minor_y_px);
500 if (minor_y_px_frac > 0 && minor_y_px_frac < 1) {
501 double yfrac = minor_y_px_frac / im->ysize;
502 double range = im->maxval - im->minval;
503 im->minval = im->minval - yfrac * range;
504 im->maxval = im->maxval - yfrac * range;
505 ytr(im, DNAN); /* reset precalc */
507 calc_horizontal_grid(im); /* recalc with changed im->maxval */
511 /* reduce data reimplementation by Alex */
515 enum cf_en cf, /* which consolidation function ?*/
516 unsigned long cur_step, /* step the data currently is in */
517 time_t *start, /* start, end and step as requested ... */
518 time_t *end, /* ... by the application will be ... */
519 unsigned long *step, /* ... adjusted to represent reality */
520 unsigned long *ds_cnt, /* number of data sources in file */
521 rrd_value_t **data) /* two dimensional array containing the data */
523 int i,reduce_factor = ceil((double)(*step) / (double)cur_step);
524 unsigned long col,dst_row,row_cnt,start_offset,end_offset,skiprows=0;
525 rrd_value_t *srcptr,*dstptr;
527 (*step) = cur_step*reduce_factor; /* set new step size for reduced data */
530 row_cnt = ((*end)-(*start))/cur_step;
536 printf("Reducing %lu rows with factor %i time %lu to %lu, step %lu\n",
537 row_cnt,reduce_factor,*start,*end,cur_step);
538 for (col=0;col<row_cnt;col++) {
539 printf("time %10lu: ",*start+(col+1)*cur_step);
540 for (i=0;i<*ds_cnt;i++)
541 printf(" %8.2e",srcptr[*ds_cnt*col+i]);
546 /* We have to combine [reduce_factor] rows of the source
547 ** into one row for the destination. Doing this we also
548 ** need to take care to combine the correct rows. First
549 ** alter the start and end time so that they are multiples
550 ** of the new step time. We cannot reduce the amount of
551 ** time so we have to move the end towards the future and
552 ** the start towards the past.
554 end_offset = (*end) % (*step);
555 start_offset = (*start) % (*step);
557 /* If there is a start offset (which cannot be more than
558 ** one destination row), skip the appropriate number of
559 ** source rows and one destination row. The appropriate
560 ** number is what we do know (start_offset/cur_step) of
561 ** the new interval (*step/cur_step aka reduce_factor).
564 printf("start_offset: %lu end_offset: %lu\n",start_offset,end_offset);
565 printf("row_cnt before: %lu\n",row_cnt);
568 (*start) = (*start)-start_offset;
569 skiprows=reduce_factor-start_offset/cur_step;
570 srcptr+=skiprows* *ds_cnt;
571 for (col=0;col<(*ds_cnt);col++) *dstptr++ = DNAN;
575 printf("row_cnt between: %lu\n",row_cnt);
578 /* At the end we have some rows that are not going to be
579 ** used, the amount is end_offset/cur_step
582 (*end) = (*end)-end_offset+(*step);
583 skiprows = end_offset/cur_step;
587 printf("row_cnt after: %lu\n",row_cnt);
590 /* Sanity check: row_cnt should be multiple of reduce_factor */
591 /* if this gets triggered, something is REALLY WRONG ... we die immediately */
593 if (row_cnt%reduce_factor) {
594 printf("SANITY CHECK: %lu rows cannot be reduced by %i \n",
595 row_cnt,reduce_factor);
596 printf("BUG in reduce_data()\n");
600 /* Now combine reduce_factor intervals at a time
601 ** into one interval for the destination.
604 for (dst_row=0;(long int)row_cnt>=reduce_factor;dst_row++) {
605 for (col=0;col<(*ds_cnt);col++) {
606 rrd_value_t newval=DNAN;
607 unsigned long validval=0;
609 for (i=0;i<reduce_factor;i++) {
610 if (isnan(srcptr[i*(*ds_cnt)+col])) {
614 if (isnan(newval)) newval = srcptr[i*(*ds_cnt)+col];
622 newval += srcptr[i*(*ds_cnt)+col];
625 newval = min (newval,srcptr[i*(*ds_cnt)+col]);
628 /* an interval contains a failure if any subintervals contained a failure */
630 newval = max (newval,srcptr[i*(*ds_cnt)+col]);
633 newval = srcptr[i*(*ds_cnt)+col];
638 if (validval == 0){newval = DNAN;} else{
656 srcptr+=(*ds_cnt)*reduce_factor;
657 row_cnt-=reduce_factor;
659 /* If we had to alter the endtime, we didn't have enough
660 ** source rows to fill the last row. Fill it with NaN.
662 if (end_offset) for (col=0;col<(*ds_cnt);col++) *dstptr++ = DNAN;
664 row_cnt = ((*end)-(*start))/ *step;
666 printf("Done reducing. Currently %lu rows, time %lu to %lu, step %lu\n",
667 row_cnt,*start,*end,*step);
668 for (col=0;col<row_cnt;col++) {
669 printf("time %10lu: ",*start+(col+1)*(*step));
670 for (i=0;i<*ds_cnt;i++)
671 printf(" %8.2e",srcptr[*ds_cnt*col+i]);
678 /* get the data required for the graphs from the
682 data_fetch(image_desc_t *im )
687 /* pull the data from the log files ... */
688 for (i=0;i< (int)im->gdes_c;i++){
689 /* only GF_DEF elements fetch data */
690 if (im->gdes[i].gf != GF_DEF)
694 /* do we have it already ?*/
695 for (ii=0;ii<i;ii++) {
696 if (im->gdes[ii].gf != GF_DEF)
698 if ((strcmp(im->gdes[i].rrd, im->gdes[ii].rrd) == 0)
699 && (im->gdes[i].cf == im->gdes[ii].cf)
700 && (im->gdes[i].cf_reduce == im->gdes[ii].cf_reduce)
701 && (im->gdes[i].start == im->gdes[ii].start)
702 && (im->gdes[i].end == im->gdes[ii].end)
703 && (im->gdes[i].step == im->gdes[ii].step)) {
704 /* OK, the data is already there.
705 ** Just copy the header portion
707 im->gdes[i].start = im->gdes[ii].start;
708 im->gdes[i].end = im->gdes[ii].end;
709 im->gdes[i].step = im->gdes[ii].step;
710 im->gdes[i].ds_cnt = im->gdes[ii].ds_cnt;
711 im->gdes[i].ds_namv = im->gdes[ii].ds_namv;
712 im->gdes[i].data = im->gdes[ii].data;
713 im->gdes[i].data_first = 0;
720 unsigned long ft_step = im->gdes[i].step ;
722 if((rrd_fetch_fn(im->gdes[i].rrd,
728 &im->gdes[i].ds_namv,
729 &im->gdes[i].data)) == -1){
732 im->gdes[i].data_first = 1;
733 im->gdes[i].step = im->step;
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) {
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;
896 rrd_realloc(steparray,
897 (++stepcnt+1)*sizeof(*steparray)))==NULL){
898 rrd_set_error("realloc steparray");
899 rpnstack_free(&rpnstack);
903 steparray[stepcnt-1] = im->gdes[ptr].step;
905 /* adjust start and end of cdef (gdi) so
906 * that it runs from the latest start point
907 * to the earliest endpoint of any of the
908 * rras involved (ptr)
910 if(im->gdes[gdi].start < im->gdes[ptr].start)
911 im->gdes[gdi].start = im->gdes[ptr].start;
913 if(im->gdes[gdi].end == 0 ||
914 im->gdes[gdi].end > im->gdes[ptr].end)
915 im->gdes[gdi].end = im->gdes[ptr].end;
917 /* store pointer to the first element of
918 * the rra providing data for variable,
919 * further save step size and data source
922 im->gdes[gdi].rpnp[rpi].data = im->gdes[ptr].data + im->gdes[ptr].ds;
923 im->gdes[gdi].rpnp[rpi].step = im->gdes[ptr].step;
924 im->gdes[gdi].rpnp[rpi].ds_cnt = im->gdes[ptr].ds_cnt;
926 /* backoff the *.data ptr; this is done so
927 * rpncalc() function doesn't have to treat
928 * the first case differently
930 } /* if ds_cnt != 0 */
931 } /* if OP_VARIABLE */
932 } /* loop through all rpi */
934 /* move the data pointers to the correct period */
935 for(rpi=0;im->gdes[gdi].rpnp[rpi].op != OP_END;rpi++){
936 if(im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
937 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER){
938 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
939 long diff = im->gdes[gdi].start - im->gdes[ptr].start;
942 im->gdes[gdi].rpnp[rpi].data += (diff / im->gdes[ptr].step) * im->gdes[ptr].ds_cnt;
946 if(steparray == NULL){
947 rrd_set_error("rpn expressions without DEF"
948 " or CDEF variables are not supported");
949 rpnstack_free(&rpnstack);
952 steparray[stepcnt]=0;
953 /* Now find the resulting step. All steps in all
954 * used RRAs have to be visited
956 im->gdes[gdi].step = lcd(steparray);
958 if((im->gdes[gdi].data = malloc((
959 (im->gdes[gdi].end-im->gdes[gdi].start)
960 / im->gdes[gdi].step)
961 * sizeof(double)))==NULL){
962 rrd_set_error("malloc im->gdes[gdi].data");
963 rpnstack_free(&rpnstack);
967 /* Step through the new cdef results array and
968 * calculate the values
970 for (now = im->gdes[gdi].start + im->gdes[gdi].step;
971 now<=im->gdes[gdi].end;
972 now += im->gdes[gdi].step)
974 rpnp_t *rpnp = im -> gdes[gdi].rpnp;
976 /* 3rd arg of rpn_calc is for OP_VARIABLE lookups;
977 * in this case we are advancing by timesteps;
978 * we use the fact that time_t is a synonym for long
980 if (rpn_calc(rpnp,&rpnstack,(long) now,
981 im->gdes[gdi].data,++dataidx) == -1) {
982 /* rpn_calc sets the error string */
983 rpnstack_free(&rpnstack);
986 } /* enumerate over time steps within a CDEF */
991 } /* enumerate over CDEFs */
992 rpnstack_free(&rpnstack);
996 /* massage data so, that we get one value for each x coordinate in the graph */
998 data_proc( image_desc_t *im ){
1000 double pixstep = (double)(im->end-im->start)
1001 /(double)im->xsize; /* how much time
1002 passes in one pixel */
1004 double minval=DNAN,maxval=DNAN;
1006 unsigned long gr_time;
1008 /* memory for the processed data */
1009 for(i=0;i<im->gdes_c;i++) {
1010 if((im->gdes[i].gf==GF_LINE) ||
1011 (im->gdes[i].gf==GF_AREA) ||
1012 (im->gdes[i].gf==GF_TICK) ||
1013 (im->gdes[i].gf==GF_STACK)) {
1014 if((im->gdes[i].p_data = malloc((im->xsize +1)
1015 * sizeof(rrd_value_t)))==NULL){
1016 rrd_set_error("malloc data_proc");
1022 for (i=0;i<im->xsize;i++) { /* for each pixel */
1024 gr_time = im->start+pixstep*i; /* time of the current step */
1027 for (ii=0;ii<im->gdes_c;ii++) {
1029 switch (im->gdes[ii].gf) {
1033 if (!im->gdes[ii].stack)
1036 value = im->gdes[ii].yrule;
1037 if (isnan(value) || (im->gdes[ii].gf == GF_TICK)) {
1038 /* The time of the data doesn't necessarily match
1039 ** the time of the graph. Beware.
1041 vidx = im->gdes[ii].vidx;
1042 if (im->gdes[vidx].gf == GF_VDEF) {
1043 value = im->gdes[vidx].vf.val;
1044 } else if (((long int)gr_time >= (long int)im->gdes[vidx].start) &&
1045 ((long int)gr_time <= (long int)im->gdes[vidx].end) ) {
1046 value = im->gdes[vidx].data[
1047 (unsigned long) floor(
1048 (double)(gr_time - im->gdes[vidx].start)
1049 / im->gdes[vidx].step)
1050 * im->gdes[vidx].ds_cnt
1058 if (! isnan(value)) {
1060 im->gdes[ii].p_data[i] = paintval;
1061 /* GF_TICK: the data values are not
1062 ** relevant for min and max
1064 if (finite(paintval) && im->gdes[ii].gf != GF_TICK ) {
1065 if (isnan(minval) || paintval < minval)
1067 if (isnan(maxval) || paintval > maxval)
1071 im->gdes[ii].p_data[i] = DNAN;
1080 /* if min or max have not been asigned a value this is because
1081 there was no data in the graph ... this is not good ...
1082 lets set these to dummy values then ... */
1084 if (isnan(minval)) minval = 0.0;
1085 if (isnan(maxval)) maxval = 1.0;
1087 /* adjust min and max values */
1088 if (isnan(im->minval)
1089 /* don't adjust low-end with log scale */
1090 || ((!im->logarithmic && !im->rigid) && im->minval > minval)
1092 im->minval = minval;
1093 if (isnan(im->maxval)
1094 || (!im->rigid && im->maxval < maxval)
1096 if (im->logarithmic)
1097 im->maxval = maxval * 1.1;
1099 im->maxval = maxval;
1101 /* make sure min is smaller than max */
1102 if (im->minval > im->maxval) {
1103 im->minval = 0.99 * im->maxval;
1106 /* make sure min and max are not equal */
1107 if (im->minval == im->maxval) {
1109 if (! im->logarithmic) {
1112 /* make sure min and max are not both zero */
1113 if (im->maxval == 0.0) {
1122 /* identify the point where the first gridline, label ... gets placed */
1126 time_t start, /* what is the initial time */
1127 enum tmt_en baseint, /* what is the basic interval */
1128 long basestep /* how many if these do we jump a time */
1132 localtime_r(&start, &tm);
1135 tm.tm_sec -= tm.tm_sec % basestep; break;
1138 tm.tm_min -= tm.tm_min % basestep;
1143 tm.tm_hour -= tm.tm_hour % basestep; break;
1145 /* we do NOT look at the basestep for this ... */
1148 tm.tm_hour = 0; break;
1150 /* we do NOT look at the basestep for this ... */
1154 tm.tm_mday -= tm.tm_wday -1; /* -1 because we want the monday */
1155 if (tm.tm_wday==0) tm.tm_mday -= 7; /* we want the *previous* monday */
1162 tm.tm_mon -= tm.tm_mon % basestep; break;
1170 tm.tm_year -= (tm.tm_year+1900) % basestep;
1175 /* identify the point where the next gridline, label ... gets placed */
1178 time_t current, /* what is the initial time */
1179 enum tmt_en baseint, /* what is the basic interval */
1180 long basestep /* how many if these do we jump a time */
1185 localtime_r(¤t, &tm);
1189 tm.tm_sec += basestep; break;
1191 tm.tm_min += basestep; break;
1193 tm.tm_hour += basestep; break;
1195 tm.tm_mday += basestep; break;
1197 tm.tm_mday += 7*basestep; break;
1199 tm.tm_mon += basestep; break;
1201 tm.tm_year += basestep;
1203 madetime = mktime(&tm);
1204 } while (madetime == -1); /* this is necessary to skip impssible times
1205 like the daylight saving time skips */
1211 /* calculate values required for PRINT and GPRINT functions */
1214 print_calc(image_desc_t *im, char ***prdata)
1216 long i,ii,validsteps;
1219 int graphelement = 0;
1222 double magfact = -1;
1226 if (im->imginfo) prlines++;
1227 for(i=0;i<im->gdes_c;i++){
1228 switch(im->gdes[i].gf){
1231 if(((*prdata) = rrd_realloc((*prdata),prlines*sizeof(char *)))==NULL){
1232 rrd_set_error("realloc prdata");
1236 /* PRINT and GPRINT can now print VDEF generated values.
1237 * There's no need to do any calculations on them as these
1238 * calculations were already made.
1240 vidx = im->gdes[i].vidx;
1241 if (im->gdes[vidx].gf==GF_VDEF) { /* simply use vals */
1242 printval = im->gdes[vidx].vf.val;
1243 printtime = im->gdes[vidx].vf.when;
1244 } else { /* need to calculate max,min,avg etcetera */
1245 max_ii =((im->gdes[vidx].end
1246 - im->gdes[vidx].start)
1247 / im->gdes[vidx].step
1248 * im->gdes[vidx].ds_cnt);
1251 for( ii=im->gdes[vidx].ds;
1253 ii+=im->gdes[vidx].ds_cnt){
1254 if (! finite(im->gdes[vidx].data[ii]))
1256 if (isnan(printval)){
1257 printval = im->gdes[vidx].data[ii];
1262 switch (im->gdes[i].cf){
1265 case CF_DEVSEASONAL:
1269 printval += im->gdes[vidx].data[ii];
1272 printval = min( printval, im->gdes[vidx].data[ii]);
1276 printval = max( printval, im->gdes[vidx].data[ii]);
1279 printval = im->gdes[vidx].data[ii];
1282 if (im->gdes[i].cf==CF_AVERAGE || im->gdes[i].cf > CF_LAST) {
1283 if (validsteps > 1) {
1284 printval = (printval / validsteps);
1287 } /* prepare printval */
1289 if (!strcmp(im->gdes[i].format,"%c")) { /* VDEF time print */
1290 char ctime_buf[128]; /* PS: for ctime_r, must be >= 26 chars */
1291 if (im->gdes[i].gf == GF_PRINT){
1292 (*prdata)[prlines-2] = malloc((FMT_LEG_LEN+2)*sizeof(char));
1293 sprintf((*prdata)[prlines-2],"%s (%lu)",
1294 ctime_r(&printtime,ctime_buf),printtime);
1295 (*prdata)[prlines-1] = NULL;
1297 sprintf(im->gdes[i].legend,"%s (%lu)",
1298 ctime_r(&printtime,ctime_buf),printtime);
1302 if ((percent_s = strstr(im->gdes[i].format,"%S")) != NULL) {
1303 /* Magfact is set to -1 upon entry to print_calc. If it
1304 * is still less than 0, then we need to run auto_scale.
1305 * Otherwise, put the value into the correct units. If
1306 * the value is 0, then do not set the symbol or magnification
1307 * so next the calculation will be performed again. */
1308 if (magfact < 0.0) {
1309 auto_scale(im,&printval,&si_symb,&magfact);
1310 if (printval == 0.0)
1313 printval /= magfact;
1315 *(++percent_s) = 's';
1316 } else if (strstr(im->gdes[i].format,"%s") != NULL) {
1317 auto_scale(im,&printval,&si_symb,&magfact);
1320 if (im->gdes[i].gf == GF_PRINT){
1321 (*prdata)[prlines-2] = malloc((FMT_LEG_LEN+2)*sizeof(char));
1322 (*prdata)[prlines-1] = NULL;
1323 if (bad_format(im->gdes[i].format)) {
1324 rrd_set_error("bad format for PRINT in '%s'", im->gdes[i].format);
1327 #ifdef HAVE_SNPRINTF
1328 snprintf((*prdata)[prlines-2],FMT_LEG_LEN,im->gdes[i].format,printval,si_symb);
1330 sprintf((*prdata)[prlines-2],im->gdes[i].format,printval,si_symb);
1335 if (bad_format(im->gdes[i].format)) {
1336 rrd_set_error("bad format for GPRINT in '%s'", im->gdes[i].format);
1339 #ifdef HAVE_SNPRINTF
1340 snprintf(im->gdes[i].legend,FMT_LEG_LEN-2,im->gdes[i].format,printval,si_symb);
1342 sprintf(im->gdes[i].legend,im->gdes[i].format,printval,si_symb);
1360 #ifdef WITH_PIECHART
1368 return graphelement;
1372 /* place legends with color spots */
1374 leg_place(image_desc_t *im)
1377 int interleg = im->text_prop[TEXT_PROP_LEGEND].size*2.0;
1378 int border = im->text_prop[TEXT_PROP_LEGEND].size*2.0;
1379 int fill=0, fill_last;
1381 int leg_x = border, leg_y = im->yimg;
1385 char prt_fctn; /*special printfunctions */
1388 if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
1389 if ((legspace = malloc(im->gdes_c*sizeof(int)))==NULL){
1390 rrd_set_error("malloc for legspace");
1394 for(i=0;i<im->gdes_c;i++){
1397 /* hid legends for rules which are not displayed */
1399 if(!(im->extra_flags & FORCE_RULES_LEGEND)) {
1400 if (im->gdes[i].gf == GF_HRULE &&
1401 (im->gdes[i].yrule < im->minval || im->gdes[i].yrule > im->maxval))
1402 im->gdes[i].legend[0] = '\0';
1404 if (im->gdes[i].gf == GF_VRULE &&
1405 (im->gdes[i].xrule < im->start || im->gdes[i].xrule > im->end))
1406 im->gdes[i].legend[0] = '\0';
1409 leg_cc = strlen(im->gdes[i].legend);
1411 /* is there a controle code ant the end of the legend string ? */
1412 /* and it is not a tab \\t */
1413 if (leg_cc >= 2 && im->gdes[i].legend[leg_cc-2] == '\\' && im->gdes[i].legend[leg_cc-1] != 't') {
1414 prt_fctn = im->gdes[i].legend[leg_cc-1];
1416 im->gdes[i].legend[leg_cc] = '\0';
1420 /* remove exess space */
1421 while (prt_fctn=='g' &&
1423 im->gdes[i].legend[leg_cc-1]==' '){
1425 im->gdes[i].legend[leg_cc]='\0';
1428 legspace[i]=(prt_fctn=='g' ? 0 : interleg);
1431 /* no interleg space if string ends in \g */
1432 fill += legspace[i];
1434 fill += gfx_get_text_width(im->canvas, fill+border,
1435 im->text_prop[TEXT_PROP_LEGEND].font,
1436 im->text_prop[TEXT_PROP_LEGEND].size,
1438 im->gdes[i].legend, 0);
1443 /* who said there was a special tag ... ?*/
1444 if (prt_fctn=='g') {
1447 if (prt_fctn == '\0') {
1448 if (i == im->gdes_c -1 ) prt_fctn ='l';
1450 /* is it time to place the legends ? */
1451 if (fill > im->ximg - 2*border){
1466 if (prt_fctn != '\0'){
1468 if (leg_c >= 2 && prt_fctn == 'j') {
1469 glue = (im->ximg - fill - 2* border) / (leg_c-1);
1473 if (prt_fctn =='c') leg_x = (im->ximg - fill) / 2.0;
1474 if (prt_fctn =='r') leg_x = im->ximg - fill - border;
1476 for(ii=mark;ii<=i;ii++){
1477 if(im->gdes[ii].legend[0]=='\0')
1478 continue; /* skip empty legends */
1479 im->gdes[ii].leg_x = leg_x;
1480 im->gdes[ii].leg_y = leg_y;
1482 gfx_get_text_width(im->canvas, leg_x,
1483 im->text_prop[TEXT_PROP_LEGEND].font,
1484 im->text_prop[TEXT_PROP_LEGEND].size,
1486 im->gdes[ii].legend, 0)
1490 leg_y += im->text_prop[TEXT_PROP_LEGEND].size*1.7;
1491 if (prt_fctn == 's') leg_y -= im->text_prop[TEXT_PROP_LEGEND].size;
1503 /* create a grid on the graph. it determines what to do
1504 from the values of xsize, start and end */
1506 /* the xaxis labels are determined from the number of seconds per pixel
1507 in the requested graph */
1512 calc_horizontal_grid(image_desc_t *im)
1518 int decimals, fractionals;
1520 im->ygrid_scale.labfact=2;
1522 range = im->maxval - im->minval;
1523 scaledrange = range / im->magfact;
1525 /* does the scale of this graph make it impossible to put lines
1526 on it? If so, give up. */
1527 if (isnan(scaledrange)) {
1531 /* find grid spaceing */
1533 if(isnan(im->ygridstep)){
1534 if(im->extra_flags & ALTYGRID) {
1535 /* find the value with max number of digits. Get number of digits */
1536 decimals = ceil(log10(max(fabs(im->maxval), fabs(im->minval))));
1537 if(decimals <= 0) /* everything is small. make place for zero */
1540 fractionals = floor(log10(range));
1541 if(fractionals < 0) /* small amplitude. */
1542 sprintf(im->ygrid_scale.labfmt, "%%%d.%df", decimals - fractionals + 1, -fractionals + 1);
1544 sprintf(im->ygrid_scale.labfmt, "%%%d.1f", decimals + 1);
1545 im->ygrid_scale.gridstep = pow((double)10, (double)fractionals);
1546 if(im->ygrid_scale.gridstep == 0) /* range is one -> 0.1 is reasonable scale */
1547 im->ygrid_scale.gridstep = 0.1;
1548 /* should have at least 5 lines but no more then 15 */
1549 if(range/im->ygrid_scale.gridstep < 5)
1550 im->ygrid_scale.gridstep /= 10;
1551 if(range/im->ygrid_scale.gridstep > 15)
1552 im->ygrid_scale.gridstep *= 10;
1553 if(range/im->ygrid_scale.gridstep > 5) {
1554 im->ygrid_scale.labfact = 1;
1555 if(range/im->ygrid_scale.gridstep > 8)
1556 im->ygrid_scale.labfact = 2;
1559 im->ygrid_scale.gridstep /= 5;
1560 im->ygrid_scale.labfact = 5;
1564 for(i=0;ylab[i].grid > 0;i++){
1565 pixel = im->ysize / (scaledrange / ylab[i].grid);
1566 if (gridind == -1 && pixel > 5) {
1573 if (pixel * ylab[gridind].lfac[i] >= 2 * im->text_prop[TEXT_PROP_AXIS].size) {
1574 im->ygrid_scale.labfact = ylab[gridind].lfac[i];
1579 im->ygrid_scale.gridstep = ylab[gridind].grid * im->magfact;
1582 im->ygrid_scale.gridstep = im->ygridstep;
1583 im->ygrid_scale.labfact = im->ylabfact;
1588 int draw_horizontal_grid(image_desc_t *im)
1592 char graph_label[100];
1593 double X0=im->xorigin;
1594 double X1=im->xorigin+im->xsize;
1596 int sgrid = (int)( im->minval / im->ygrid_scale.gridstep - 1);
1597 int egrid = (int)( im->maxval / im->ygrid_scale.gridstep + 1);
1598 scaledstep = im->ygrid_scale.gridstep/im->magfact;
1599 for (i = sgrid; i <= egrid; i++){
1600 double Y0=ytr(im,im->ygrid_scale.gridstep*i);
1601 if ( Y0 >= im->yorigin-im->ysize
1602 && Y0 <= im->yorigin){
1603 if(i % im->ygrid_scale.labfact == 0){
1604 if (i==0 || im->symbol == ' ') {
1606 if(im->extra_flags & ALTYGRID) {
1607 sprintf(graph_label,im->ygrid_scale.labfmt,scaledstep*i);
1610 sprintf(graph_label,"%4.1f",scaledstep*i);
1613 sprintf(graph_label,"%4.0f",scaledstep*i);
1617 sprintf(graph_label,"%4.1f %c",scaledstep*i, im->symbol);
1619 sprintf(graph_label,"%4.0f %c",scaledstep*i, im->symbol);
1623 gfx_new_text ( im->canvas,
1624 X0-im->text_prop[TEXT_PROP_AXIS].size/1.5, Y0,
1625 im->graph_col[GRC_FONT],
1626 im->text_prop[TEXT_PROP_AXIS].font,
1627 im->text_prop[TEXT_PROP_AXIS].size,
1628 im->tabwidth, 0.0, GFX_H_RIGHT, GFX_V_CENTER,
1630 gfx_new_dashed_line ( im->canvas,
1633 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1634 im->grid_dash_on, im->grid_dash_off);
1636 } else if (!(im->extra_flags & NOMINOR)) {
1637 gfx_new_dashed_line ( im->canvas,
1640 GRIDWIDTH, im->graph_col[GRC_GRID],
1641 im->grid_dash_on, im->grid_dash_off);
1649 /* logaritmic horizontal grid */
1651 horizontal_log_grid(image_desc_t *im)
1655 int minoridx=0, majoridx=0;
1656 char graph_label[100];
1658 double value, pixperstep, minstep;
1660 /* find grid spaceing */
1661 pixpex= (double)im->ysize / (log10(im->maxval) - log10(im->minval));
1663 if (isnan(pixpex)) {
1667 for(i=0;yloglab[i][0] > 0;i++){
1668 minstep = log10(yloglab[i][0]);
1669 for(ii=1;yloglab[i][ii+1] > 0;ii++){
1670 if(yloglab[i][ii+2]==0){
1671 minstep = log10(yloglab[i][ii+1])-log10(yloglab[i][ii]);
1675 pixperstep = pixpex * minstep;
1676 if(pixperstep > 5){minoridx = i;}
1677 if(pixperstep > 2 * im->text_prop[TEXT_PROP_LEGEND].size){majoridx = i;}
1681 X1=im->xorigin+im->xsize;
1682 /* paint minor grid */
1683 for (value = pow((double)10, log10(im->minval)
1684 - fmod(log10(im->minval),log10(yloglab[minoridx][0])));
1685 value <= im->maxval;
1686 value *= yloglab[minoridx][0]){
1687 if (value < im->minval) continue;
1689 while(yloglab[minoridx][++i] > 0){
1690 Y0 = ytr(im,value * yloglab[minoridx][i]);
1691 if (Y0 <= im->yorigin - im->ysize) break;
1692 gfx_new_dashed_line ( im->canvas,
1695 GRIDWIDTH, im->graph_col[GRC_GRID],
1696 im->grid_dash_on, im->grid_dash_off);
1700 /* paint major grid and labels*/
1701 for (value = pow((double)10, log10(im->minval)
1702 - fmod(log10(im->minval),log10(yloglab[majoridx][0])));
1703 value <= im->maxval;
1704 value *= yloglab[majoridx][0]){
1705 if (value < im->minval) continue;
1707 while(yloglab[majoridx][++i] > 0){
1708 Y0 = ytr(im,value * yloglab[majoridx][i]);
1709 if (Y0 <= im->yorigin - im->ysize) break;
1710 gfx_new_dashed_line ( im->canvas,
1713 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1714 im->grid_dash_on, im->grid_dash_off);
1716 sprintf(graph_label,"%3.0e",value * yloglab[majoridx][i]);
1717 gfx_new_text ( im->canvas,
1718 X0-im->text_prop[TEXT_PROP_AXIS].size/1.5, Y0,
1719 im->graph_col[GRC_FONT],
1720 im->text_prop[TEXT_PROP_AXIS].font,
1721 im->text_prop[TEXT_PROP_AXIS].size,
1722 im->tabwidth,0.0, GFX_H_RIGHT, GFX_V_CENTER,
1734 int xlab_sel; /* which sort of label and grid ? */
1735 time_t ti, tilab, timajor;
1737 char graph_label[100];
1738 double X0,Y0,Y1; /* points for filled graph and more*/
1741 /* the type of time grid is determined by finding
1742 the number of seconds per pixel in the graph */
1745 if(im->xlab_user.minsec == -1){
1746 factor=(im->end - im->start)/im->xsize;
1748 while ( xlab[xlab_sel+1].minsec != -1
1749 && xlab[xlab_sel+1].minsec <= factor){ xlab_sel++; }
1750 im->xlab_user.gridtm = xlab[xlab_sel].gridtm;
1751 im->xlab_user.gridst = xlab[xlab_sel].gridst;
1752 im->xlab_user.mgridtm = xlab[xlab_sel].mgridtm;
1753 im->xlab_user.mgridst = xlab[xlab_sel].mgridst;
1754 im->xlab_user.labtm = xlab[xlab_sel].labtm;
1755 im->xlab_user.labst = xlab[xlab_sel].labst;
1756 im->xlab_user.precis = xlab[xlab_sel].precis;
1757 im->xlab_user.stst = xlab[xlab_sel].stst;
1760 /* y coords are the same for every line ... */
1762 Y1 = im->yorigin-im->ysize;
1765 /* paint the minor grid */
1766 if (!(im->extra_flags & NOMINOR))
1768 for(ti = find_first_time(im->start,
1769 im->xlab_user.gridtm,
1770 im->xlab_user.gridst),
1771 timajor = find_first_time(im->start,
1772 im->xlab_user.mgridtm,
1773 im->xlab_user.mgridst);
1775 ti = find_next_time(ti,im->xlab_user.gridtm,im->xlab_user.gridst)
1777 /* are we inside the graph ? */
1778 if (ti < im->start || ti > im->end) continue;
1779 while (timajor < ti) {
1780 timajor = find_next_time(timajor,
1781 im->xlab_user.mgridtm, im->xlab_user.mgridst);
1783 if (ti == timajor) continue; /* skip as falls on major grid line */
1785 gfx_new_dashed_line(im->canvas,X0,Y0+1, X0,Y1-1,GRIDWIDTH,
1786 im->graph_col[GRC_GRID],
1787 im->grid_dash_on, im->grid_dash_off);
1792 /* paint the major grid */
1793 for(ti = find_first_time(im->start,
1794 im->xlab_user.mgridtm,
1795 im->xlab_user.mgridst);
1797 ti = find_next_time(ti,im->xlab_user.mgridtm,im->xlab_user.mgridst)
1799 /* are we inside the graph ? */
1800 if (ti < im->start || ti > im->end) continue;
1802 gfx_new_dashed_line(im->canvas,X0,Y0+3, X0,Y1-2,MGRIDWIDTH,
1803 im->graph_col[GRC_MGRID],
1804 im->grid_dash_on, im->grid_dash_off);
1807 /* paint the labels below the graph */
1808 for(ti = find_first_time(im->start,
1809 im->xlab_user.labtm,
1810 im->xlab_user.labst);
1812 ti = find_next_time(ti,im->xlab_user.labtm,im->xlab_user.labst)
1814 tilab= ti + im->xlab_user.precis/2; /* correct time for the label */
1815 /* are we inside the graph ? */
1816 if (ti < im->start || ti > im->end) continue;
1819 localtime_r(&tilab, &tm);
1820 strftime(graph_label,99,im->xlab_user.stst, &tm);
1822 # error "your libc has no strftime I guess we'll abort the exercise here."
1824 gfx_new_text ( im->canvas,
1825 xtr(im,tilab), Y0+im->text_prop[TEXT_PROP_AXIS].size/1.5,
1826 im->graph_col[GRC_FONT],
1827 im->text_prop[TEXT_PROP_AXIS].font,
1828 im->text_prop[TEXT_PROP_AXIS].size,
1829 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_TOP,
1842 /* draw x and y axis */
1843 /* gfx_new_line ( im->canvas, im->xorigin+im->xsize,im->yorigin,
1844 im->xorigin+im->xsize,im->yorigin-im->ysize,
1845 GRIDWIDTH, im->graph_col[GRC_AXIS]);
1847 gfx_new_line ( im->canvas, im->xorigin,im->yorigin-im->ysize,
1848 im->xorigin+im->xsize,im->yorigin-im->ysize,
1849 GRIDWIDTH, im->graph_col[GRC_AXIS]); */
1851 gfx_new_line ( im->canvas, im->xorigin-4,im->yorigin,
1852 im->xorigin+im->xsize+4,im->yorigin,
1853 MGRIDWIDTH, im->graph_col[GRC_AXIS]);
1855 gfx_new_line ( im->canvas, im->xorigin,im->yorigin+4,
1856 im->xorigin,im->yorigin-im->ysize-4,
1857 MGRIDWIDTH, im->graph_col[GRC_AXIS]);
1860 /* arrow for X axis direction */
1861 gfx_new_area ( im->canvas,
1862 im->xorigin+im->xsize+3, im->yorigin-3,
1863 im->xorigin+im->xsize+3, im->yorigin+4,
1864 im->xorigin+im->xsize+8, im->yorigin+0.5, /* LINEOFFSET */
1865 im->graph_col[GRC_ARROW]);
1870 grid_paint(image_desc_t *im)
1874 double X0,Y0; /* points for filled graph and more*/
1877 /* draw 3d border */
1878 node = gfx_new_area (im->canvas, 0,im->yimg,
1880 2,2,im->graph_col[GRC_SHADEA]);
1881 gfx_add_point( node , im->ximg - 2, 2 );
1882 gfx_add_point( node , im->ximg, 0 );
1883 gfx_add_point( node , 0,0 );
1884 /* gfx_add_point( node , 0,im->yimg ); */
1886 node = gfx_new_area (im->canvas, 2,im->yimg-2,
1887 im->ximg-2,im->yimg-2,
1889 im->graph_col[GRC_SHADEB]);
1890 gfx_add_point( node , im->ximg,0);
1891 gfx_add_point( node , im->ximg,im->yimg);
1892 gfx_add_point( node , 0,im->yimg);
1893 /* gfx_add_point( node , 0,im->yimg ); */
1896 if (im->draw_x_grid == 1 )
1899 if (im->draw_y_grid == 1){
1900 if(im->logarithmic){
1901 res = horizontal_log_grid(im);
1903 res = draw_horizontal_grid(im);
1906 /* dont draw horizontal grid if there is no min and max val */
1908 char *nodata = "No Data found";
1909 gfx_new_text(im->canvas,im->ximg/2, (2*im->yorigin-im->ysize) / 2,
1910 im->graph_col[GRC_FONT],
1911 im->text_prop[TEXT_PROP_AXIS].font,
1912 im->text_prop[TEXT_PROP_AXIS].size,
1913 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_CENTER,
1918 /* yaxis unit description */
1919 gfx_new_text( im->canvas,
1920 7, (im->yorigin - im->ysize/2),
1921 im->graph_col[GRC_FONT],
1922 im->text_prop[TEXT_PROP_UNIT].font,
1923 im->text_prop[TEXT_PROP_UNIT].size, im->tabwidth,
1924 RRDGRAPH_YLEGEND_ANGLE,
1925 GFX_H_LEFT, GFX_V_CENTER,
1929 gfx_new_text( im->canvas,
1930 im->ximg/2, im->text_prop[TEXT_PROP_TITLE].size*1.2,
1931 im->graph_col[GRC_FONT],
1932 im->text_prop[TEXT_PROP_TITLE].font,
1933 im->text_prop[TEXT_PROP_TITLE].size, im->tabwidth, 0.0,
1934 GFX_H_CENTER, GFX_V_CENTER,
1938 if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
1939 for(i=0;i<im->gdes_c;i++){
1940 if(im->gdes[i].legend[0] =='\0')
1943 /* im->gdes[i].leg_y is the bottom of the legend */
1944 X0 = im->gdes[i].leg_x;
1945 Y0 = im->gdes[i].leg_y;
1946 gfx_new_text ( im->canvas, X0, Y0,
1947 im->graph_col[GRC_FONT],
1948 im->text_prop[TEXT_PROP_LEGEND].font,
1949 im->text_prop[TEXT_PROP_LEGEND].size,
1950 im->tabwidth,0.0, GFX_H_LEFT, GFX_V_BOTTOM,
1951 im->gdes[i].legend );
1952 /* The legend for GRAPH items starts with "M " to have
1953 enough space for the box */
1954 if ( im->gdes[i].gf != GF_PRINT &&
1955 im->gdes[i].gf != GF_GPRINT &&
1956 im->gdes[i].gf != GF_COMMENT) {
1959 boxH = gfx_get_text_width(im->canvas, 0,
1960 im->text_prop[TEXT_PROP_LEGEND].font,
1961 im->text_prop[TEXT_PROP_LEGEND].size,
1962 im->tabwidth,"M", 0)*1.2;
1965 node = gfx_new_area(im->canvas,
1970 gfx_add_point ( node, X0+boxH, Y0-boxV );
1971 node = gfx_new_line(im->canvas,
1974 gfx_add_point(node,X0+boxH,Y0);
1975 gfx_add_point(node,X0+boxH,Y0-boxV);
1976 gfx_close_path(node);
1983 /*****************************************************
1984 * lazy check make sure we rely need to create this graph
1985 *****************************************************/
1987 int lazy_check(image_desc_t *im){
1990 struct stat imgstat;
1992 if (im->lazy == 0) return 0; /* no lazy option */
1993 if (stat(im->graphfile,&imgstat) != 0)
1994 return 0; /* can't stat */
1995 /* one pixel in the existing graph is more then what we would
1997 if (time(NULL) - imgstat.st_mtime >
1998 (im->end - im->start) / im->xsize)
2000 if ((fd = fopen(im->graphfile,"rb")) == NULL)
2001 return 0; /* the file does not exist */
2002 switch (im->canvas->imgformat) {
2004 size = PngSize(fd,&(im->ximg),&(im->yimg));
2013 #ifdef WITH_PIECHART
2015 pie_part(image_desc_t *im, gfx_color_t color,
2016 double PieCenterX, double PieCenterY, double Radius,
2017 double startangle, double endangle)
2021 double step=M_PI/50; /* Number of iterations for the circle;
2022 ** 10 is definitely too low, more than
2023 ** 50 seems to be overkill
2026 /* Strange but true: we have to work clockwise or else
2027 ** anti aliasing nor transparency don't work.
2029 ** This test is here to make sure we do it right, also
2030 ** this makes the for...next loop more easy to implement.
2031 ** The return will occur if the user enters a negative number
2032 ** (which shouldn't be done according to the specs) or if the
2033 ** programmers do something wrong (which, as we all know, never
2034 ** happens anyway :)
2036 if (endangle<startangle) return;
2038 /* Hidden feature: Radius decreases each full circle */
2040 while (angle>=2*M_PI) {
2045 node=gfx_new_area(im->canvas,
2046 PieCenterX+sin(startangle)*Radius,
2047 PieCenterY-cos(startangle)*Radius,
2050 PieCenterX+sin(endangle)*Radius,
2051 PieCenterY-cos(endangle)*Radius,
2053 for (angle=endangle;angle-startangle>=step;angle-=step) {
2055 PieCenterX+sin(angle)*Radius,
2056 PieCenterY-cos(angle)*Radius );
2063 graph_size_location(image_desc_t *im, int elements
2065 #ifdef WITH_PIECHART
2071 /* The actual size of the image to draw is determined from
2072 ** several sources. The size given on the command line is
2073 ** the graph area but we need more as we have to draw labels
2074 ** and other things outside the graph area
2077 /* +-+-------------------------------------------+
2078 ** |l|.................title.....................|
2079 ** |e+--+-------------------------------+--------+
2082 ** |l| l| main graph area | chart |
2085 ** |r+--+-------------------------------+--------+
2086 ** |e| | x-axis labels | |
2087 ** |v+--+-------------------------------+--------+
2088 ** | |..............legends......................|
2089 ** +-+-------------------------------------------+
2091 int Xvertical=0, Yvertical=0,
2092 Xtitle =0, Ytitle =0,
2093 Xylabel =0, Yylabel =0,
2096 Xxlabel =0, Yxlabel =0,
2098 Xlegend =0, Ylegend =0,
2100 Xspacing =10, Yspacing =10;
2102 if (im->extra_flags & ONLY_GRAPH) {
2106 if (im->ylegend[0] != '\0') {
2107 Xvertical = im->text_prop[TEXT_PROP_UNIT].size *2;
2108 Yvertical = gfx_get_text_width(im->canvas, 0,
2109 im->text_prop[TEXT_PROP_UNIT].font,
2110 im->text_prop[TEXT_PROP_UNIT].size,
2111 im->tabwidth,im->ylegend, 0);
2115 if (im->title[0] != '\0') {
2116 /* The title is placed "inbetween" two text lines so it
2117 ** automatically has some vertical spacing. The horizontal
2118 ** spacing is added here, on each side.
2120 Xtitle = gfx_get_text_width(im->canvas, 0,
2121 im->text_prop[TEXT_PROP_TITLE].font,
2122 im->text_prop[TEXT_PROP_TITLE].size,
2124 im->title, 0) + 2*Xspacing;
2125 Ytitle = im->text_prop[TEXT_PROP_TITLE].size*2.5;
2131 if (im->draw_x_grid) {
2133 Yxlabel=im->text_prop[TEXT_PROP_AXIS].size *2.5;
2135 if (im->draw_y_grid) {
2136 Xylabel=im->text_prop[TEXT_PROP_AXIS].size *6;
2141 #ifdef WITH_PIECHART
2143 im->piesize=im->xsize<im->ysize?im->xsize:im->ysize;
2149 /* Now calculate the total size. Insert some spacing where
2150 desired. im->xorigin and im->yorigin need to correspond
2151 with the lower left corner of the main graph area or, if
2152 this one is not set, the imaginary box surrounding the
2155 /* The legend width cannot yet be determined, as a result we
2156 ** have problems adjusting the image to it. For now, we just
2157 ** forget about it at all; the legend will have to fit in the
2158 ** size already allocated.
2162 if ( !(im->extra_flags & ONLY_GRAPH) ) {
2163 im->ximg = Xylabel + Xmain + Xpie + 2 * Xspacing;
2166 if (Xmain) im->ximg += Xspacing;
2167 if (Xpie) im->ximg += Xspacing;
2169 if (im->extra_flags & ONLY_GRAPH) {
2172 im->xorigin = Xspacing + Xylabel;
2175 if (Xtitle > im->ximg) im->ximg = Xtitle;
2177 im->ximg += Xvertical;
2178 im->xorigin += Xvertical;
2182 /* The vertical size is interesting... we need to compare
2183 ** the sum of {Ytitle, Ymain, Yxlabel, Ylegend} with Yvertical
2184 ** however we need to know {Ytitle+Ymain+Yxlabel} in order to
2185 ** start even thinking about Ylegend.
2187 ** Do it in three portions: First calculate the inner part,
2188 ** then do the legend, then adjust the total height of the img.
2191 /* reserve space for main and/or pie */
2193 if (im->extra_flags & ONLY_GRAPH) {
2196 im->yimg = Ymain + Yxlabel;
2199 if (im->yimg < Ypie) im->yimg = Ypie;
2201 if (im->extra_flags & ONLY_GRAPH) {
2202 im->yorigin = im->yimg;
2204 im->yorigin = im->yimg - Yxlabel;
2207 /* reserve space for the title *or* some padding above the graph */
2210 im->yorigin += Ytitle;
2212 im->yimg += Yspacing;
2213 im->yorigin += Yspacing;
2215 /* reserve space for padding below the graph */
2216 im->yimg += Yspacing;
2219 /* Determine where to place the legends onto the image.
2220 ** Adjust im->yimg to match the space requirements.
2222 if(leg_place(im)==-1)
2225 /* last of three steps: check total height of image */
2226 if (im->yimg < Yvertical) im->yimg = Yvertical;
2229 if (Xlegend > im->ximg) {
2231 /* reposition Pie */
2235 #ifdef WITH_PIECHART
2236 /* The pie is placed in the upper right hand corner,
2237 ** just below the title (if any) and with sufficient
2241 im->pie_x = im->ximg - Xspacing - Xpie/2;
2242 im->pie_y = im->yorigin-Ymain+Ypie/2;
2244 im->pie_x = im->ximg/2;
2245 im->pie_y = im->yorigin-Ypie/2;
2252 /* draw that picture thing ... */
2254 graph_paint(image_desc_t *im, char ***calcpr)
2257 int lazy = lazy_check(im);
2258 #ifdef WITH_PIECHART
2260 double PieStart=0.0;
2265 double areazero = 0.0;
2266 enum gf_en stack_gf = GF_PRINT;
2267 graph_desc_t *lastgdes = NULL;
2269 /* if we are lazy and there is nothing to PRINT ... quit now */
2270 if (lazy && im->prt_c==0) return 0;
2272 /* pull the data from the rrd files ... */
2274 if(data_fetch(im)==-1)
2277 /* evaluate VDEF and CDEF operations ... */
2278 if(data_calc(im)==-1)
2281 #ifdef WITH_PIECHART
2282 /* check if we need to draw a piechart */
2283 for(i=0;i<im->gdes_c;i++){
2284 if (im->gdes[i].gf == GF_PART) {
2291 /* calculate and PRINT and GPRINT definitions. We have to do it at
2292 * this point because it will affect the length of the legends
2293 * if there are no graph elements we stop here ...
2294 * if we are lazy, try to quit ...
2296 i=print_calc(im,calcpr);
2299 #ifdef WITH_PIECHART
2302 ) || lazy) return 0;
2304 #ifdef WITH_PIECHART
2305 /* If there's only the pie chart to draw, signal this */
2306 if (i==0) piechart=2;
2309 /* get actual drawing data and find min and max values*/
2310 if(data_proc(im)==-1)
2313 if(!im->logarithmic){si_unit(im);} /* identify si magnitude Kilo, Mega Giga ? */
2315 if(!im->rigid && ! im->logarithmic)
2316 expand_range(im); /* make sure the upper and lower limit are
2319 if (!calc_horizontal_grid(im))
2326 /**************************************************************
2327 *** Calculating sizes and locations became a bit confusing ***
2328 *** so I moved this into a separate function. ***
2329 **************************************************************/
2330 if(graph_size_location(im,i
2331 #ifdef WITH_PIECHART
2337 /* the actual graph is created by going through the individual
2338 graph elements and then drawing them */
2340 node=gfx_new_area ( im->canvas,
2344 im->graph_col[GRC_BACK]);
2346 gfx_add_point(node,0, im->yimg);
2348 #ifdef WITH_PIECHART
2349 if (piechart != 2) {
2351 node=gfx_new_area ( im->canvas,
2352 im->xorigin, im->yorigin,
2353 im->xorigin + im->xsize, im->yorigin,
2354 im->xorigin + im->xsize, im->yorigin-im->ysize,
2355 im->graph_col[GRC_CANVAS]);
2357 gfx_add_point(node,im->xorigin, im->yorigin - im->ysize);
2359 if (im->minval > 0.0)
2360 areazero = im->minval;
2361 if (im->maxval < 0.0)
2362 areazero = im->maxval;
2363 #ifdef WITH_PIECHART
2367 #ifdef WITH_PIECHART
2369 pie_part(im,im->graph_col[GRC_CANVAS],im->pie_x,im->pie_y,im->piesize*0.5,0,2*M_PI);
2373 for(i=0;i<im->gdes_c;i++){
2374 switch(im->gdes[i].gf){
2387 for (ii = 0; ii < im->xsize; ii++)
2389 if (!isnan(im->gdes[i].p_data[ii]) &&
2390 im->gdes[i].p_data[ii] > 0.0)
2392 /* generate a tick */
2393 gfx_new_line(im->canvas, im -> xorigin + ii,
2394 im -> yorigin - (im -> gdes[i].yrule * im -> ysize),
2398 im -> gdes[i].col );
2404 stack_gf = im->gdes[i].gf;
2406 /* fix data points at oo and -oo */
2407 for(ii=0;ii<im->xsize;ii++){
2408 if (isinf(im->gdes[i].p_data[ii])){
2409 if (im->gdes[i].p_data[ii] > 0) {
2410 im->gdes[i].p_data[ii] = im->maxval ;
2412 im->gdes[i].p_data[ii] = im->minval ;
2418 if (im->gdes[i].col != 0x0){
2419 /* GF_LINE and friend */
2420 if(stack_gf == GF_LINE ){
2422 for(ii=1;ii<im->xsize;ii++){
2423 if ( ! isnan(im->gdes[i].p_data[ii-1])
2424 && ! isnan(im->gdes[i].p_data[ii])){
2426 node = gfx_new_line(im->canvas,
2427 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii-1]),
2428 ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]),
2429 im->gdes[i].linewidth,
2432 gfx_add_point(node,ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]));
2441 for(ii=1;ii<im->xsize;ii++){
2443 if ( ! isnan(im->gdes[i].p_data[ii-1])
2444 && ! isnan(im->gdes[i].p_data[ii])){
2448 if (im->gdes[i].gf == GF_STACK) {
2450 if ( (im->gdes[i].gf == GF_STACK)
2451 || (im->gdes[i].stack) ) {
2453 ybase = ytr(im,lastgdes->p_data[ii-1]);
2455 ybase = ytr(im,areazero);
2458 node = gfx_new_area(im->canvas,
2459 ii-1+im->xorigin,ybase,
2460 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii-1]),
2461 ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]),
2465 gfx_add_point(node,ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]));
2469 if ( node != NULL && (ii+1==im->xsize || isnan(im->gdes[i].p_data[ii]) )){
2470 /* GF_AREA STACK type*/
2472 if (im->gdes[i].gf == GF_STACK ) {
2474 if ( (im->gdes[i].gf == GF_STACK)
2475 || (im->gdes[i].stack) ) {
2477 for (iii=ii-1;iii>area_start;iii--){
2478 gfx_add_point(node,iii+im->xorigin,ytr(im,lastgdes->p_data[iii]));
2481 gfx_add_point(node,ii+im->xorigin,ytr(im,areazero));
2486 } /* else GF_LINE */
2487 } /* if color != 0x0 */
2488 /* make sure we do not run into trouble when stacking on NaN */
2489 for(ii=0;ii<im->xsize;ii++){
2490 if (isnan(im->gdes[i].p_data[ii])) {
2491 if (lastgdes && (im->gdes[i].gf == GF_STACK)) {
2492 im->gdes[i].p_data[ii] = lastgdes->p_data[ii];
2494 im->gdes[i].p_data[ii] = ytr(im,areazero);
2498 lastgdes = &(im->gdes[i]);
2500 #ifdef WITH_PIECHART
2502 if(isnan(im->gdes[i].yrule)) /* fetch variable */
2503 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2505 if (finite(im->gdes[i].yrule)) { /* even the fetched var can be NaN */
2506 pie_part(im,im->gdes[i].col,
2507 im->pie_x,im->pie_y,im->piesize*0.4,
2508 M_PI*2.0*PieStart/100.0,
2509 M_PI*2.0*(PieStart+im->gdes[i].yrule)/100.0);
2510 PieStart += im->gdes[i].yrule;
2517 #ifdef WITH_PIECHART
2524 if( !(im->extra_flags & ONLY_GRAPH) )
2527 /* grid_paint also does the text */
2528 if( !(im->extra_flags & ONLY_GRAPH) )
2531 /* the RULES are the last thing to paint ... */
2532 for(i=0;i<im->gdes_c;i++){
2534 switch(im->gdes[i].gf){
2536 if(isnan(im->gdes[i].yrule)) { /* fetch variable */
2537 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2539 if(im->gdes[i].yrule >= im->minval
2540 && im->gdes[i].yrule <= im->maxval)
2541 gfx_new_line(im->canvas,
2542 im->xorigin,ytr(im,im->gdes[i].yrule),
2543 im->xorigin+im->xsize,ytr(im,im->gdes[i].yrule),
2544 1.0,im->gdes[i].col);
2547 if(im->gdes[i].xrule == 0) { /* fetch variable */
2548 im->gdes[i].xrule = im->gdes[im->gdes[i].vidx].vf.when;
2550 if(im->gdes[i].xrule >= im->start
2551 && im->gdes[i].xrule <= im->end)
2552 gfx_new_line(im->canvas,
2553 xtr(im,im->gdes[i].xrule),im->yorigin,
2554 xtr(im,im->gdes[i].xrule),im->yorigin-im->ysize,
2555 1.0,im->gdes[i].col);
2563 if (strcmp(im->graphfile,"-")==0) {
2564 fo = im->graphhandle ? im->graphhandle : stdout;
2566 /* Change translation mode for stdout to BINARY */
2567 _setmode( _fileno( fo ), O_BINARY );
2570 if ((fo = fopen(im->graphfile,"wb")) == NULL) {
2571 rrd_set_error("Opening '%s' for write: %s",im->graphfile,
2572 rrd_strerror(errno));
2576 gfx_render (im->canvas,im->ximg,im->yimg,0x0,fo);
2577 if (strcmp(im->graphfile,"-") != 0)
2583 /*****************************************************
2585 *****************************************************/
2588 gdes_alloc(image_desc_t *im){
2591 if ((im->gdes = (graph_desc_t *) rrd_realloc(im->gdes, (im->gdes_c)
2592 * sizeof(graph_desc_t)))==NULL){
2593 rrd_set_error("realloc graph_descs");
2598 im->gdes[im->gdes_c-1].step=im->step;
2599 im->gdes[im->gdes_c-1].stack=0;
2600 im->gdes[im->gdes_c-1].debug=0;
2601 im->gdes[im->gdes_c-1].start=im->start;
2602 im->gdes[im->gdes_c-1].end=im->end;
2603 im->gdes[im->gdes_c-1].vname[0]='\0';
2604 im->gdes[im->gdes_c-1].data=NULL;
2605 im->gdes[im->gdes_c-1].ds_namv=NULL;
2606 im->gdes[im->gdes_c-1].data_first=0;
2607 im->gdes[im->gdes_c-1].p_data=NULL;
2608 im->gdes[im->gdes_c-1].rpnp=NULL;
2609 im->gdes[im->gdes_c-1].shift=0;
2610 im->gdes[im->gdes_c-1].col = 0x0;
2611 im->gdes[im->gdes_c-1].legend[0]='\0';
2612 im->gdes[im->gdes_c-1].format[0]='\0';
2613 im->gdes[im->gdes_c-1].rrd[0]='\0';
2614 im->gdes[im->gdes_c-1].ds=-1;
2615 im->gdes[im->gdes_c-1].p_data=NULL;
2616 im->gdes[im->gdes_c-1].yrule=DNAN;
2617 im->gdes[im->gdes_c-1].xrule=0;
2621 /* copies input untill the first unescaped colon is found
2622 or until input ends. backslashes have to be escaped as well */
2624 scan_for_col(char *input, int len, char *output)
2629 input[inp] != ':' &&
2632 if (input[inp] == '\\' &&
2633 input[inp+1] != '\0' &&
2634 (input[inp+1] == '\\' ||
2635 input[inp+1] == ':')){
2636 output[outp++] = input[++inp];
2639 output[outp++] = input[inp];
2642 output[outp] = '\0';
2645 /* Some surgery done on this function, it became ridiculously big.
2647 ** - initializing now in rrd_graph_init()
2648 ** - options parsing now in rrd_graph_options()
2649 ** - script parsing now in rrd_graph_script()
2652 rrd_graph(int argc, char **argv, char ***prdata, int *xsize, int *ysize, FILE *stream, double *ymin, double *ymax)
2656 rrd_graph_init(&im);
2657 im.graphhandle = stream;
2659 rrd_graph_options(argc,argv,&im);
2660 if (rrd_test_error()) {
2665 if (strlen(argv[optind])>=MAXPATH) {
2666 rrd_set_error("filename (including path) too long");
2670 strncpy(im.graphfile,argv[optind],MAXPATH-1);
2671 im.graphfile[MAXPATH-1]='\0';
2673 rrd_graph_script(argc,argv,&im,1);
2674 if (rrd_test_error()) {
2679 /* Everything is now read and the actual work can start */
2682 if (graph_paint(&im,prdata)==-1){
2687 /* The image is generated and needs to be output.
2688 ** Also, if needed, print a line with information about the image.
2698 /* maybe prdata is not allocated yet ... lets do it now */
2699 if ((*prdata = calloc(2,sizeof(char *)))==NULL) {
2700 rrd_set_error("malloc imginfo");
2704 if(((*prdata)[0] = malloc((strlen(im.imginfo)+200+strlen(im.graphfile))*sizeof(char)))
2706 rrd_set_error("malloc imginfo");
2709 filename=im.graphfile+strlen(im.graphfile);
2710 while(filename > im.graphfile) {
2711 if (*(filename-1)=='/' || *(filename-1)=='\\' ) break;
2715 sprintf((*prdata)[0],im.imginfo,filename,(long)(im.canvas->zoom*im.ximg),(long)(im.canvas->zoom*im.yimg));
2722 rrd_graph_init(image_desc_t *im)
2729 #ifdef HAVE_SETLOCALE
2730 setlocale(LC_TIME,"");
2733 im->xlab_user.minsec = -1;
2739 im->ylegend[0] = '\0';
2740 im->title[0] = '\0';
2743 im->unitsexponent= 9999;
2749 im->logarithmic = 0;
2750 im->ygridstep = DNAN;
2751 im->draw_x_grid = 1;
2752 im->draw_y_grid = 1;
2757 im->canvas = gfx_new_canvas();
2758 im->grid_dash_on = 1;
2759 im->grid_dash_off = 1;
2760 im->tabwidth = 40.0;
2762 for(i=0;i<DIM(graph_col);i++)
2763 im->graph_col[i]=graph_col[i];
2767 windir = getenv("windir");
2768 /* %windir% is something like D:\windows or C:\winnt */
2769 if (windir != NULL) {
2770 strcpy(rrd_win_default_font,windir);
2771 strcat(rrd_win_default_font,"\\fonts\\cour.ttf");
2772 for(i=0;i<DIM(text_prop);i++)
2773 strcpy(text_prop[i].font,rrd_win_default_font);
2777 for(i=0;i<DIM(text_prop);i++){
2778 im->text_prop[i].size = text_prop[i].size;
2779 strcpy(im->text_prop[i].font,text_prop[i].font);
2784 rrd_graph_options(int argc, char *argv[],image_desc_t *im)
2787 char *parsetime_error = NULL;
2788 char scan_gtm[12],scan_mtm[12],scan_ltm[12],col_nam[12];
2789 time_t start_tmp=0,end_tmp=0;
2791 struct rrd_time_value start_tv, end_tv;
2794 parsetime("end-24h", &start_tv);
2795 parsetime("now", &end_tv);
2798 static struct option long_options[] =
2800 {"start", required_argument, 0, 's'},
2801 {"end", required_argument, 0, 'e'},
2802 {"x-grid", required_argument, 0, 'x'},
2803 {"y-grid", required_argument, 0, 'y'},
2804 {"vertical-label",required_argument,0,'v'},
2805 {"width", required_argument, 0, 'w'},
2806 {"height", required_argument, 0, 'h'},
2807 {"interlaced", no_argument, 0, 'i'},
2808 {"upper-limit",required_argument, 0, 'u'},
2809 {"lower-limit",required_argument, 0, 'l'},
2810 {"rigid", no_argument, 0, 'r'},
2811 {"base", required_argument, 0, 'b'},
2812 {"logarithmic",no_argument, 0, 'o'},
2813 {"color", required_argument, 0, 'c'},
2814 {"font", required_argument, 0, 'n'},
2815 {"title", required_argument, 0, 't'},
2816 {"imginfo", required_argument, 0, 'f'},
2817 {"imgformat", required_argument, 0, 'a'},
2818 {"lazy", no_argument, 0, 'z'},
2819 {"zoom", required_argument, 0, 'm'},
2820 {"no-legend", no_argument, 0, 'g'},
2821 {"force-rules-legend",no_argument,0, 'F'},
2822 {"only-graph", no_argument, 0, 'j'},
2823 {"alt-y-grid", no_argument, 0, 'Y'},
2824 {"no-minor", no_argument, 0, 'I'},
2825 {"alt-autoscale", no_argument, 0, 'A'},
2826 {"alt-autoscale-max", no_argument, 0, 'M'},
2827 {"units-exponent",required_argument, 0, 'X'},
2828 {"step", required_argument, 0, 'S'},
2829 {"tabwidth", required_argument, 0, 'T'},
2830 {"no-gridfit", no_argument, 0, 'N'},
2832 int option_index = 0;
2836 opt = getopt_long(argc, argv,
2837 "s:e:x:y:v:w:h:iu:l:rb:oc:n:m:t:f:a:I:zgjFYAMX:S:NT:",
2838 long_options, &option_index);
2845 im->extra_flags |= NOMINOR;
2848 im->extra_flags |= ALTYGRID;
2851 im->extra_flags |= ALTAUTOSCALE;
2854 im->extra_flags |= ALTAUTOSCALE_MAX;
2857 im->extra_flags |= ONLY_GRAPH;
2860 im->extra_flags |= NOLEGEND;
2863 im->extra_flags |= FORCE_RULES_LEGEND;
2866 im->unitsexponent = atoi(optarg);
2869 im->tabwidth = atof(optarg);
2872 im->step = atoi(optarg);
2878 if ((parsetime_error = parsetime(optarg, &start_tv))) {
2879 rrd_set_error( "start time: %s", parsetime_error );
2884 if ((parsetime_error = parsetime(optarg, &end_tv))) {
2885 rrd_set_error( "end time: %s", parsetime_error );
2890 if(strcmp(optarg,"none") == 0){
2896 "%10[A-Z]:%ld:%10[A-Z]:%ld:%10[A-Z]:%ld:%ld:%n",
2898 &im->xlab_user.gridst,
2900 &im->xlab_user.mgridst,
2902 &im->xlab_user.labst,
2903 &im->xlab_user.precis,
2904 &stroff) == 7 && stroff != 0){
2905 strncpy(im->xlab_form, optarg+stroff, sizeof(im->xlab_form) - 1);
2906 if((int)(im->xlab_user.gridtm = tmt_conv(scan_gtm)) == -1){
2907 rrd_set_error("unknown keyword %s",scan_gtm);
2909 } else if ((int)(im->xlab_user.mgridtm = tmt_conv(scan_mtm)) == -1){
2910 rrd_set_error("unknown keyword %s",scan_mtm);
2912 } else if ((int)(im->xlab_user.labtm = tmt_conv(scan_ltm)) == -1){
2913 rrd_set_error("unknown keyword %s",scan_ltm);
2916 im->xlab_user.minsec = 1;
2917 im->xlab_user.stst = im->xlab_form;
2919 rrd_set_error("invalid x-grid format");
2925 if(strcmp(optarg,"none") == 0){
2933 &im->ylabfact) == 2) {
2934 if(im->ygridstep<=0){
2935 rrd_set_error("grid step must be > 0");
2937 } else if (im->ylabfact < 1){
2938 rrd_set_error("label factor must be > 0");
2942 rrd_set_error("invalid y-grid format");
2947 strncpy(im->ylegend,optarg,150);
2948 im->ylegend[150]='\0';
2951 im->maxval = atof(optarg);
2954 im->minval = atof(optarg);
2957 im->base = atol(optarg);
2958 if(im->base != 1024 && im->base != 1000 ){
2959 rrd_set_error("the only sensible value for base apart from 1000 is 1024");
2964 long_tmp = atol(optarg);
2965 if (long_tmp < 10) {
2966 rrd_set_error("width below 10 pixels");
2969 im->xsize = long_tmp;
2972 long_tmp = atol(optarg);
2973 if (long_tmp < 10) {
2974 rrd_set_error("height below 10 pixels");
2977 im->ysize = long_tmp;
2980 im->canvas->interlaced = 1;
2986 im->imginfo = optarg;
2989 if((int)(im->canvas->imgformat = if_conv(optarg)) == -1) {
2990 rrd_set_error("unsupported graphics format '%s'",optarg);
2998 im->logarithmic = 1;
2999 if (isnan(im->minval))
3005 col_nam,&color) == 2){
3007 if((ci=grc_conv(col_nam)) != -1){
3008 im->graph_col[ci]=color;
3010 rrd_set_error("invalid color name '%s'",col_nam);
3013 rrd_set_error("invalid color def format");
3023 "%10[A-Z]:%lf:%1000s",
3024 prop,&size,font) == 3){
3026 if((sindex=text_prop_conv(prop)) != -1){
3027 im->text_prop[sindex].size=size;
3028 strcpy(im->text_prop[sindex].font,font);
3029 if (sindex==0) { /* the default */
3030 im->text_prop[TEXT_PROP_TITLE].size=size;
3031 strcpy(im->text_prop[TEXT_PROP_TITLE].font,font);
3032 im->text_prop[TEXT_PROP_AXIS].size=size;
3033 strcpy(im->text_prop[TEXT_PROP_AXIS].font,font);
3034 im->text_prop[TEXT_PROP_UNIT].size=size;
3035 strcpy(im->text_prop[TEXT_PROP_UNIT].font,font);
3036 im->text_prop[TEXT_PROP_LEGEND].size=size;
3037 strcpy(im->text_prop[TEXT_PROP_LEGEND].font,font);
3040 rrd_set_error("invalid fonttag '%s'",prop);
3044 rrd_set_error("invalid text property format");
3050 im->canvas->zoom = atof(optarg);
3051 if (im->canvas->zoom <= 0.0) {
3052 rrd_set_error("zoom factor must be > 0");
3057 strncpy(im->title,optarg,150);
3058 im->title[150]='\0';
3063 rrd_set_error("unknown option '%c'", optopt);
3065 rrd_set_error("unknown option '%s'",argv[optind-1]);
3070 if (optind >= argc) {
3071 rrd_set_error("missing filename");
3075 if (im->logarithmic == 1 && (im->minval <= 0 || isnan(im->minval))){
3076 rrd_set_error("for a logarithmic yaxis you must specify a lower-limit > 0");
3080 if (proc_start_end(&start_tv,&end_tv,&start_tmp,&end_tmp) == -1){
3081 /* error string is set in parsetime.c */
3085 if (start_tmp < 3600*24*365*10){
3086 rrd_set_error("the first entry to fetch should be after 1980 (%ld)",start_tmp);
3090 if (end_tmp < start_tmp) {
3091 rrd_set_error("start (%ld) should be less than end (%ld)",
3092 start_tmp, end_tmp);
3096 im->start = start_tmp;
3098 im->step = max((long)im->step, (im->end-im->start)/im->xsize);
3102 rrd_graph_check_vname(image_desc_t *im, char *varname, char *err)
3104 if ((im->gdes[im->gdes_c-1].vidx=find_var(im,varname))==-1) {
3105 rrd_set_error("Unknown variable '%s' in %s",varname,err);
3111 rrd_graph_color(image_desc_t *im, char *var, char *err, int optional)
3114 graph_desc_t *gdp=&im->gdes[im->gdes_c-1];
3116 color=strstr(var,"#");
3119 rrd_set_error("Found no color in %s",err);
3128 rest=strstr(color,":");
3136 sscanf(color,"#%6lx%n",&col,&n);
3137 col = (col << 8) + 0xff /* shift left by 8 */;
3138 if (n!=7) rrd_set_error("Color problem in %s",err);
3141 sscanf(color,"#%8lx%n",&col,&n);
3144 rrd_set_error("Color problem in %s",err);
3146 if (rrd_test_error()) return 0;
3153 int bad_format(char *fmt) {
3157 while (*ptr != '\0')
3158 if (*ptr++ == '%') {
3160 /* line cannot end with percent char */
3161 if (*ptr == '\0') return 1;
3163 /* '%s', '%S' and '%%' are allowed */
3164 if (*ptr == 's' || *ptr == 'S' || *ptr == '%') ptr++;
3166 /* or else '% 6.2lf' and such are allowed */
3169 /* optional padding character */
3170 if (*ptr == ' ' || *ptr == '+' || *ptr == '-') ptr++;
3172 /* This should take care of 'm.n' with all three optional */
3173 while (*ptr >= '0' && *ptr <= '9') ptr++;
3174 if (*ptr == '.') ptr++;
3175 while (*ptr >= '0' && *ptr <= '9') ptr++;
3177 /* Either 'le', 'lf' or 'lg' must follow here */
3178 if (*ptr++ != 'l') return 1;
3179 if (*ptr == 'e' || *ptr == 'f' || *ptr == 'g') ptr++;
3190 vdef_parse(gdes,str)
3191 struct graph_desc_t *gdes;
3194 /* A VDEF currently is either "func" or "param,func"
3195 * so the parsing is rather simple. Change if needed.
3202 sscanf(str,"%le,%29[A-Z]%n",¶m,func,&n);
3203 if (n== (int)strlen(str)) { /* matched */
3207 sscanf(str,"%29[A-Z]%n",func,&n);
3208 if (n== (int)strlen(str)) { /* matched */
3211 rrd_set_error("Unknown function string '%s' in VDEF '%s'"
3218 if (!strcmp("PERCENT",func)) gdes->vf.op = VDEF_PERCENT;
3219 else if (!strcmp("MAXIMUM",func)) gdes->vf.op = VDEF_MAXIMUM;
3220 else if (!strcmp("AVERAGE",func)) gdes->vf.op = VDEF_AVERAGE;
3221 else if (!strcmp("MINIMUM",func)) gdes->vf.op = VDEF_MINIMUM;
3222 else if (!strcmp("TOTAL", func)) gdes->vf.op = VDEF_TOTAL;
3223 else if (!strcmp("FIRST", func)) gdes->vf.op = VDEF_FIRST;
3224 else if (!strcmp("LAST", func)) gdes->vf.op = VDEF_LAST;
3226 rrd_set_error("Unknown function '%s' in VDEF '%s'\n"
3233 switch (gdes->vf.op) {
3235 if (isnan(param)) { /* no parameter given */
3236 rrd_set_error("Function '%s' needs parameter in VDEF '%s'\n"
3242 if (param>=0.0 && param<=100.0) {
3243 gdes->vf.param = param;
3244 gdes->vf.val = DNAN; /* undefined */
3245 gdes->vf.when = 0; /* undefined */
3247 rrd_set_error("Parameter '%f' out of range in VDEF '%s'\n"
3261 gdes->vf.param = DNAN;
3262 gdes->vf.val = DNAN;
3265 rrd_set_error("Function '%s' needs no parameter in VDEF '%s'\n"
3282 graph_desc_t *src,*dst;
3286 dst = &im->gdes[gdi];
3287 src = &im->gdes[dst->vidx];
3288 data = src->data + src->ds;
3289 steps = (src->end - src->start) / src->step;
3292 printf("DEBUG: start == %lu, end == %lu, %lu steps\n"
3299 switch (dst->vf.op) {
3300 case VDEF_PERCENT: {
3301 rrd_value_t * array;
3305 if ((array = malloc(steps*sizeof(double)))==NULL) {
3306 rrd_set_error("malloc VDEV_PERCENT");
3309 for (step=0;step < steps; step++) {
3310 array[step]=data[step*src->ds_cnt];
3312 qsort(array,step,sizeof(double),vdef_percent_compar);
3314 field = (steps-1)*dst->vf.param/100;
3315 dst->vf.val = array[field];
3316 dst->vf.when = 0; /* no time component */
3319 for(step=0;step<steps;step++)
3320 printf("DEBUG: %3li:%10.2f %c\n",step,array[step],step==field?'*':' ');
3326 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3327 if (step == steps) {
3331 dst->vf.val = data[step*src->ds_cnt];
3332 dst->vf.when = src->start + (step+1)*src->step;
3334 while (step != steps) {
3335 if (finite(data[step*src->ds_cnt])) {
3336 if (data[step*src->ds_cnt] > dst->vf.val) {
3337 dst->vf.val = data[step*src->ds_cnt];
3338 dst->vf.when = src->start + (step+1)*src->step;
3345 case VDEF_AVERAGE: {
3348 for (step=0;step<steps;step++) {
3349 if (finite(data[step*src->ds_cnt])) {
3350 sum += data[step*src->ds_cnt];
3355 if (dst->vf.op == VDEF_TOTAL) {
3356 dst->vf.val = sum*src->step;
3357 dst->vf.when = cnt*src->step; /* not really "when" */
3359 dst->vf.val = sum/cnt;
3360 dst->vf.when = 0; /* no time component */
3370 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3371 if (step == steps) {
3375 dst->vf.val = data[step*src->ds_cnt];
3376 dst->vf.when = src->start + (step+1)*src->step;
3378 while (step != steps) {
3379 if (finite(data[step*src->ds_cnt])) {
3380 if (data[step*src->ds_cnt] < dst->vf.val) {
3381 dst->vf.val = data[step*src->ds_cnt];
3382 dst->vf.when = src->start + (step+1)*src->step;
3389 /* The time value returned here is one step before the
3390 * actual time value. This is the start of the first
3394 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3395 if (step == steps) { /* all entries were NaN */
3399 dst->vf.val = data[step*src->ds_cnt];
3400 dst->vf.when = src->start + step*src->step;
3404 /* The time value returned here is the
3405 * actual time value. This is the end of the last
3409 while (step >= 0 && isnan(data[step*src->ds_cnt])) step--;
3410 if (step < 0) { /* all entries were NaN */
3414 dst->vf.val = data[step*src->ds_cnt];
3415 dst->vf.when = src->start + (step+1)*src->step;
3422 /* NaN < -INF < finite_values < INF */
3424 vdef_percent_compar(a,b)
3427 /* Equality is not returned; this doesn't hurt except
3428 * (maybe) for a little performance.
3431 /* First catch NaN values. They are smallest */
3432 if (isnan( *(double *)a )) return -1;
3433 if (isnan( *(double *)b )) return 1;
3435 /* NaN doesn't reach this part so INF and -INF are extremes.
3436 * The sign from isinf() is compatible with the sign we return
3438 if (isinf( *(double *)a )) return isinf( *(double *)a );
3439 if (isinf( *(double *)b )) return isinf( *(double *)b );
3441 /* If we reach this, both values must be finite */
3442 if ( *(double *)a < *(double *)b ) return -1; else return 1;