1 /****************************************************************************
2 * RRDtool 1.2.23 Copyright by Tobi Oetiker, 1997-2007
3 ****************************************************************************
4 * rrd__graph.c produce graphs from data in rrdfiles
5 ****************************************************************************/
15 #if defined(WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
28 #include "rrd_graph.h"
30 /* some constant definitions */
34 #ifndef RRD_DEFAULT_FONT
35 /* there is special code later to pick Cour.ttf when running on windows */
36 #define RRD_DEFAULT_FONT "DejaVuSansMono-Roman.ttf"
39 text_prop_t text_prop[] = {
40 {8.0, RRD_DEFAULT_FONT}
42 {9.0, RRD_DEFAULT_FONT}
44 {7.0, RRD_DEFAULT_FONT}
46 {8.0, RRD_DEFAULT_FONT}
48 {8.0, RRD_DEFAULT_FONT} /* legend */
52 {0, 0, TMT_SECOND, 30, TMT_MINUTE, 5, TMT_MINUTE, 5, 0, "%H:%M"}
54 {2, 0, TMT_MINUTE, 1, TMT_MINUTE, 5, TMT_MINUTE, 5, 0, "%H:%M"}
56 {5, 0, TMT_MINUTE, 2, TMT_MINUTE, 10, TMT_MINUTE, 10, 0, "%H:%M"}
58 {10, 0, TMT_MINUTE, 5, TMT_MINUTE, 20, TMT_MINUTE, 20, 0, "%H:%M"}
60 {30, 0, TMT_MINUTE, 10, TMT_HOUR, 1, TMT_HOUR, 1, 0, "%H:%M"}
62 {60, 0, TMT_MINUTE, 30, TMT_HOUR, 2, TMT_HOUR, 2, 0, "%H:%M"}
64 {60, 24 * 3600, TMT_MINUTE, 30, TMT_HOUR, 2, TMT_HOUR, 4, 0, "%a %H:%M"}
66 {180, 0, TMT_HOUR, 1, TMT_HOUR, 6, TMT_HOUR, 6, 0, "%H:%M"}
68 {180, 24 * 3600, TMT_HOUR, 1, TMT_HOUR, 6, TMT_HOUR, 12, 0, "%a %H:%M"}
70 /*{300, 0, TMT_HOUR,3, TMT_HOUR,12, TMT_HOUR,12, 12*3600,"%a %p"}, this looks silly */
71 {600, 0, TMT_HOUR, 6, TMT_DAY, 1, TMT_DAY, 1, 24 * 3600, "%a"}
73 {1200, 0, TMT_HOUR, 6, TMT_DAY, 1, TMT_DAY, 1, 24 * 3600, "%d"}
75 {1800, 0, TMT_HOUR, 12, TMT_DAY, 1, TMT_DAY, 2, 24 * 3600, "%a %d"}
77 {2400, 0, TMT_HOUR, 12, TMT_DAY, 1, TMT_DAY, 2, 24 * 3600, "%a"}
79 {3600, 0, TMT_DAY, 1, TMT_WEEK, 1, TMT_WEEK, 1, 7 * 24 * 3600, "Week %V"}
81 {3 * 3600, 0, TMT_WEEK, 1, TMT_MONTH, 1, TMT_WEEK, 2, 7 * 24 * 3600,
84 {6 * 3600, 0, TMT_MONTH, 1, TMT_MONTH, 1, TMT_MONTH, 1, 30 * 24 * 3600,
87 {48 * 3600, 0, TMT_MONTH, 1, TMT_MONTH, 3, TMT_MONTH, 3, 30 * 24 * 3600,
90 {315360, 0, TMT_MONTH, 3, TMT_YEAR, 1, TMT_YEAR, 1, 365 * 24 * 3600, "%Y"}
92 {10 * 24 * 3600, 0, TMT_YEAR, 1, TMT_YEAR, 1, TMT_YEAR, 1,
93 365 * 24 * 3600, "%y"}
95 {-1, 0, TMT_MONTH, 0, TMT_MONTH, 0, TMT_MONTH, 0, 0, ""}
98 /* sensible y label intervals ...*/
122 {20.0, {1, 5, 10, 20}
128 {100.0, {1, 2, 5, 10}
131 {200.0, {1, 5, 10, 20}
134 {500.0, {1, 2, 4, 10}
142 gfx_color_t graph_col[] = /* default colors */
144 {1.00, 1.00, 1.00, 1.00}, /* canvas */
145 {0.95, 0.95, 0.95, 1.00}, /* background */
146 {0.81, 0.81, 0.81, 1.00}, /* shade A */
147 {0.62, 0.62, 0.62, 1.00}, /* shade B */
148 {0.56, 0.56, 0.56, 0.75}, /* grid */
149 {0.87, 0.31, 0.31, 0.60}, /* major grid */
150 {0.00, 0.00, 0.00, 1.00}, /* font */
151 {0.50, 0.12, 0.12, 1.00}, /* arrow */
152 {0.12, 0.12, 0.12, 1.00}, /* axis */
153 {0.00, 0.00, 0.00, 1.00} /* frame */
160 # define DPRINT(x) (void)(printf x, printf("\n"))
166 /* initialize with xtr(im,0); */
174 pixie = (double) im->xsize / (double) (im->end - im->start);
177 return (int) ((double) im->xorigin + pixie * (mytime - im->start));
180 /* translate data values into y coordinates */
189 if (!im->logarithmic)
190 pixie = (double) im->ysize / (im->maxval - im->minval);
193 (double) im->ysize / (log10(im->maxval) - log10(im->minval));
195 } else if (!im->logarithmic) {
196 yval = im->yorigin - pixie * (value - im->minval);
198 if (value < im->minval) {
201 yval = im->yorigin - pixie * (log10(value) - log10(im->minval));
204 /* make sure we don't return anything too unreasonable. GD lib can
205 get terribly slow when drawing lines outside its scope. This is
206 especially problematic in connection with the rigid option */
208 /* keep yval as-is */
209 } else if (yval > im->yorigin) {
210 yval = im->yorigin + 0.00001;
211 } else if (yval < im->yorigin - im->ysize) {
212 yval = im->yorigin - im->ysize - 0.00001;
219 /* conversion function for symbolic entry names */
222 #define conv_if(VV,VVV) \
223 if (strcmp(#VV, string) == 0) return VVV ;
229 conv_if(PRINT, GF_PRINT);
230 conv_if(GPRINT, GF_GPRINT);
231 conv_if(COMMENT, GF_COMMENT);
232 conv_if(HRULE, GF_HRULE);
233 conv_if(VRULE, GF_VRULE);
234 conv_if(LINE, GF_LINE);
235 conv_if(AREA, GF_AREA);
236 conv_if(STACK, GF_STACK);
237 conv_if(TICK, GF_TICK);
238 conv_if(DEF, GF_DEF);
239 conv_if(CDEF, GF_CDEF);
240 conv_if(VDEF, GF_VDEF);
241 conv_if(XPORT, GF_XPORT);
242 conv_if(SHIFT, GF_SHIFT);
247 enum gfx_if_en if_conv(
251 conv_if(PNG, IF_PNG);
252 conv_if(SVG, IF_SVG);
253 conv_if(EPS, IF_EPS);
254 conv_if(PDF, IF_PDF);
259 enum tmt_en tmt_conv(
263 conv_if(SECOND, TMT_SECOND);
264 conv_if(MINUTE, TMT_MINUTE);
265 conv_if(HOUR, TMT_HOUR);
266 conv_if(DAY, TMT_DAY);
267 conv_if(WEEK, TMT_WEEK);
268 conv_if(MONTH, TMT_MONTH);
269 conv_if(YEAR, TMT_YEAR);
273 enum grc_en grc_conv(
277 conv_if(BACK, GRC_BACK);
278 conv_if(CANVAS, GRC_CANVAS);
279 conv_if(SHADEA, GRC_SHADEA);
280 conv_if(SHADEB, GRC_SHADEB);
281 conv_if(GRID, GRC_GRID);
282 conv_if(MGRID, GRC_MGRID);
283 conv_if(FONT, GRC_FONT);
284 conv_if(ARROW, GRC_ARROW);
285 conv_if(AXIS, GRC_AXIS);
286 conv_if(FRAME, GRC_FRAME);
291 enum text_prop_en text_prop_conv(
295 conv_if(DEFAULT, TEXT_PROP_DEFAULT);
296 conv_if(TITLE, TEXT_PROP_TITLE);
297 conv_if(AXIS, TEXT_PROP_AXIS);
298 conv_if(UNIT, TEXT_PROP_UNIT);
299 conv_if(LEGEND, TEXT_PROP_LEGEND);
313 for (i = 0; i < (unsigned) im->gdes_c; i++) {
314 if (im->gdes[i].data_first) {
315 /* careful here, because a single pointer can occur several times */
316 free(im->gdes[i].data);
317 if (im->gdes[i].ds_namv) {
318 for (ii = 0; ii < im->gdes[i].ds_cnt; ii++)
319 free(im->gdes[i].ds_namv[ii]);
320 free(im->gdes[i].ds_namv);
323 free(im->gdes[i].p_data);
324 free(im->gdes[i].rpnp);
328 cairo_surface_destroy(im->surface);
332 /* find SI magnitude symbol for the given number*/
334 image_desc_t *im, /* image description */
340 char *symbol[] = { "a", /* 10e-18 Atto */
341 "f", /* 10e-15 Femto */
342 "p", /* 10e-12 Pico */
343 "n", /* 10e-9 Nano */
344 "u", /* 10e-6 Micro */
345 "m", /* 10e-3 Milli */
350 "T", /* 10e12 Tera */
351 "P", /* 10e15 Peta */
358 if (*value == 0.0 || isnan(*value)) {
362 sindex = floor(log(fabs(*value)) / log((double) im->base));
363 *magfact = pow((double) im->base, (double) sindex);
364 (*value) /= (*magfact);
366 if (sindex <= symbcenter && sindex >= -symbcenter) {
367 (*symb_ptr) = symbol[sindex + symbcenter];
374 static char si_symbol[] = {
375 'a', /* 10e-18 Atto */
376 'f', /* 10e-15 Femto */
377 'p', /* 10e-12 Pico */
378 'n', /* 10e-9 Nano */
379 'u', /* 10e-6 Micro */
380 'm', /* 10e-3 Milli */
385 'T', /* 10e12 Tera */
386 'P', /* 10e15 Peta */
389 static const int si_symbcenter = 6;
391 /* find SI magnitude symbol for the numbers on the y-axis*/
393 image_desc_t *im /* image description */
397 double digits, viewdigits = 0;
400 floor(log(max(fabs(im->minval), fabs(im->maxval))) /
401 log((double) im->base));
403 if (im->unitsexponent != 9999) {
404 /* unitsexponent = 9, 6, 3, 0, -3, -6, -9, etc */
405 viewdigits = floor(im->unitsexponent / 3);
410 im->magfact = pow((double) im->base, digits);
413 printf("digits %6.3f im->magfact %6.3f\n", digits, im->magfact);
416 im->viewfactor = im->magfact / pow((double) im->base, viewdigits);
418 if (((viewdigits + si_symbcenter) < sizeof(si_symbol)) &&
419 ((viewdigits + si_symbcenter) >= 0))
420 im->symbol = si_symbol[(int) viewdigits + si_symbcenter];
425 /* move min and max values around to become sensible */
430 double sensiblevalues[] = { 1000.0, 900.0, 800.0, 750.0, 700.0,
431 600.0, 500.0, 400.0, 300.0, 250.0,
432 200.0, 125.0, 100.0, 90.0, 80.0,
433 75.0, 70.0, 60.0, 50.0, 40.0, 30.0,
434 25.0, 20.0, 10.0, 9.0, 8.0,
435 7.0, 6.0, 5.0, 4.0, 3.5, 3.0,
436 2.5, 2.0, 1.8, 1.5, 1.2, 1.0,
437 0.8, 0.7, 0.6, 0.5, 0.4, 0.3, 0.2, 0.1, 0.0, -1
440 double scaled_min, scaled_max;
447 printf("Min: %6.2f Max: %6.2f MagFactor: %6.2f\n",
448 im->minval, im->maxval, im->magfact);
451 if (isnan(im->ygridstep)) {
452 if (im->extra_flags & ALTAUTOSCALE) {
453 /* measure the amplitude of the function. Make sure that
454 graph boundaries are slightly higher then max/min vals
455 so we can see amplitude on the graph */
458 delt = im->maxval - im->minval;
460 fact = 2.0 * pow(10.0,
462 (max(fabs(im->minval), fabs(im->maxval)) /
465 adj = (fact - delt) * 0.55;
468 ("Min: %6.2f Max: %6.2f delt: %6.2f fact: %6.2f adj: %6.2f\n",
469 im->minval, im->maxval, delt, fact, adj);
474 } else if (im->extra_flags & ALTAUTOSCALE_MIN) {
475 /* measure the amplitude of the function. Make sure that
476 graph boundaries are slightly lower than min vals
477 so we can see amplitude on the graph */
478 adj = (im->maxval - im->minval) * 0.1;
480 } else if (im->extra_flags & ALTAUTOSCALE_MAX) {
481 /* measure the amplitude of the function. Make sure that
482 graph boundaries are slightly higher than max vals
483 so we can see amplitude on the graph */
484 adj = (im->maxval - im->minval) * 0.1;
487 scaled_min = im->minval / im->magfact;
488 scaled_max = im->maxval / im->magfact;
490 for (i = 1; sensiblevalues[i] > 0; i++) {
491 if (sensiblevalues[i - 1] >= scaled_min &&
492 sensiblevalues[i] <= scaled_min)
493 im->minval = sensiblevalues[i] * (im->magfact);
495 if (-sensiblevalues[i - 1] <= scaled_min &&
496 -sensiblevalues[i] >= scaled_min)
497 im->minval = -sensiblevalues[i - 1] * (im->magfact);
499 if (sensiblevalues[i - 1] >= scaled_max &&
500 sensiblevalues[i] <= scaled_max)
501 im->maxval = sensiblevalues[i - 1] * (im->magfact);
503 if (-sensiblevalues[i - 1] <= scaled_max &&
504 -sensiblevalues[i] >= scaled_max)
505 im->maxval = -sensiblevalues[i] * (im->magfact);
509 /* adjust min and max to the grid definition if there is one */
510 im->minval = (double) im->ylabfact * im->ygridstep *
511 floor(im->minval / ((double) im->ylabfact * im->ygridstep));
512 im->maxval = (double) im->ylabfact * im->ygridstep *
513 ceil(im->maxval / ((double) im->ylabfact * im->ygridstep));
517 fprintf(stderr, "SCALED Min: %6.2f Max: %6.2f Factor: %6.2f\n",
518 im->minval, im->maxval, im->magfact);
526 if (isnan(im->minval) || isnan(im->maxval))
529 if (im->logarithmic) {
530 double ya, yb, ypix, ypixfrac;
531 double log10_range = log10(im->maxval) - log10(im->minval);
533 ya = pow((double) 10, floor(log10(im->minval)));
534 while (ya < im->minval)
537 return; /* don't have y=10^x gridline */
539 if (yb <= im->maxval) {
540 /* we have at least 2 y=10^x gridlines.
541 Make sure distance between them in pixels
542 are an integer by expanding im->maxval */
543 double y_pixel_delta = ytr(im, ya) - ytr(im, yb);
544 double factor = y_pixel_delta / floor(y_pixel_delta);
545 double new_log10_range = factor * log10_range;
546 double new_ymax_log10 = log10(im->minval) + new_log10_range;
548 im->maxval = pow(10, new_ymax_log10);
549 ytr(im, DNAN); /* reset precalc */
550 log10_range = log10(im->maxval) - log10(im->minval);
552 /* make sure first y=10^x gridline is located on
553 integer pixel position by moving scale slightly
554 downwards (sub-pixel movement) */
555 ypix = ytr(im, ya) + im->ysize; /* add im->ysize so it always is positive */
556 ypixfrac = ypix - floor(ypix);
557 if (ypixfrac > 0 && ypixfrac < 1) {
558 double yfrac = ypixfrac / im->ysize;
560 im->minval = pow(10, log10(im->minval) - yfrac * log10_range);
561 im->maxval = pow(10, log10(im->maxval) - yfrac * log10_range);
562 ytr(im, DNAN); /* reset precalc */
565 /* Make sure we have an integer pixel distance between
566 each minor gridline */
567 double ypos1 = ytr(im, im->minval);
568 double ypos2 = ytr(im, im->minval + im->ygrid_scale.gridstep);
569 double y_pixel_delta = ypos1 - ypos2;
570 double factor = y_pixel_delta / floor(y_pixel_delta);
571 double new_range = factor * (im->maxval - im->minval);
572 double gridstep = im->ygrid_scale.gridstep;
573 double minor_y, minor_y_px, minor_y_px_frac;
575 if (im->maxval > 0.0)
576 im->maxval = im->minval + new_range;
578 im->minval = im->maxval - new_range;
579 ytr(im, DNAN); /* reset precalc */
580 /* make sure first minor gridline is on integer pixel y coord */
581 minor_y = gridstep * floor(im->minval / gridstep);
582 while (minor_y < im->minval)
584 minor_y_px = ytr(im, minor_y) + im->ysize; /* ensure > 0 by adding ysize */
585 minor_y_px_frac = minor_y_px - floor(minor_y_px);
586 if (minor_y_px_frac > 0 && minor_y_px_frac < 1) {
587 double yfrac = minor_y_px_frac / im->ysize;
588 double range = im->maxval - im->minval;
590 im->minval = im->minval - yfrac * range;
591 im->maxval = im->maxval - yfrac * range;
592 ytr(im, DNAN); /* reset precalc */
594 calc_horizontal_grid(im); /* recalc with changed im->maxval */
598 /* reduce data reimplementation by Alex */
601 enum cf_en cf, /* which consolidation function ? */
602 unsigned long cur_step, /* step the data currently is in */
603 time_t *start, /* start, end and step as requested ... */
604 time_t *end, /* ... by the application will be ... */
605 unsigned long *step, /* ... adjusted to represent reality */
606 unsigned long *ds_cnt, /* number of data sources in file */
608 { /* two dimensional array containing the data */
609 int i, reduce_factor = ceil((double) (*step) / (double) cur_step);
610 unsigned long col, dst_row, row_cnt, start_offset, end_offset, skiprows =
612 rrd_value_t *srcptr, *dstptr;
614 (*step) = cur_step * reduce_factor; /* set new step size for reduced data */
617 row_cnt = ((*end) - (*start)) / cur_step;
623 printf("Reducing %lu rows with factor %i time %lu to %lu, step %lu\n",
624 row_cnt, reduce_factor, *start, *end, cur_step);
625 for (col = 0; col < row_cnt; col++) {
626 printf("time %10lu: ", *start + (col + 1) * cur_step);
627 for (i = 0; i < *ds_cnt; i++)
628 printf(" %8.2e", srcptr[*ds_cnt * col + i]);
633 /* We have to combine [reduce_factor] rows of the source
634 ** into one row for the destination. Doing this we also
635 ** need to take care to combine the correct rows. First
636 ** alter the start and end time so that they are multiples
637 ** of the new step time. We cannot reduce the amount of
638 ** time so we have to move the end towards the future and
639 ** the start towards the past.
641 end_offset = (*end) % (*step);
642 start_offset = (*start) % (*step);
644 /* If there is a start offset (which cannot be more than
645 ** one destination row), skip the appropriate number of
646 ** source rows and one destination row. The appropriate
647 ** number is what we do know (start_offset/cur_step) of
648 ** the new interval (*step/cur_step aka reduce_factor).
651 printf("start_offset: %lu end_offset: %lu\n", start_offset, end_offset);
652 printf("row_cnt before: %lu\n", row_cnt);
655 (*start) = (*start) - start_offset;
656 skiprows = reduce_factor - start_offset / cur_step;
657 srcptr += skiprows * *ds_cnt;
658 for (col = 0; col < (*ds_cnt); col++)
663 printf("row_cnt between: %lu\n", row_cnt);
666 /* At the end we have some rows that are not going to be
667 ** used, the amount is end_offset/cur_step
670 (*end) = (*end) - end_offset + (*step);
671 skiprows = end_offset / cur_step;
675 printf("row_cnt after: %lu\n", row_cnt);
678 /* Sanity check: row_cnt should be multiple of reduce_factor */
679 /* if this gets triggered, something is REALLY WRONG ... we die immediately */
681 if (row_cnt % reduce_factor) {
682 printf("SANITY CHECK: %lu rows cannot be reduced by %i \n",
683 row_cnt, reduce_factor);
684 printf("BUG in reduce_data()\n");
688 /* Now combine reduce_factor intervals at a time
689 ** into one interval for the destination.
692 for (dst_row = 0; (long int) row_cnt >= reduce_factor; dst_row++) {
693 for (col = 0; col < (*ds_cnt); col++) {
694 rrd_value_t newval = DNAN;
695 unsigned long validval = 0;
697 for (i = 0; i < reduce_factor; i++) {
698 if (isnan(srcptr[i * (*ds_cnt) + col])) {
703 newval = srcptr[i * (*ds_cnt) + col];
711 newval += srcptr[i * (*ds_cnt) + col];
714 newval = min(newval, srcptr[i * (*ds_cnt) + col]);
717 /* an interval contains a failure if any subintervals contained a failure */
719 newval = max(newval, srcptr[i * (*ds_cnt) + col]);
722 newval = srcptr[i * (*ds_cnt) + col];
747 srcptr += (*ds_cnt) * reduce_factor;
748 row_cnt -= reduce_factor;
750 /* If we had to alter the endtime, we didn't have enough
751 ** source rows to fill the last row. Fill it with NaN.
754 for (col = 0; col < (*ds_cnt); col++)
757 row_cnt = ((*end) - (*start)) / *step;
759 printf("Done reducing. Currently %lu rows, time %lu to %lu, step %lu\n",
760 row_cnt, *start, *end, *step);
761 for (col = 0; col < row_cnt; col++) {
762 printf("time %10lu: ", *start + (col + 1) * (*step));
763 for (i = 0; i < *ds_cnt; i++)
764 printf(" %8.2e", srcptr[*ds_cnt * col + i]);
771 /* get the data required for the graphs from the
780 /* pull the data from the rrd files ... */
781 for (i = 0; i < (int) im->gdes_c; i++) {
782 /* only GF_DEF elements fetch data */
783 if (im->gdes[i].gf != GF_DEF)
787 /* do we have it already ? */
788 for (ii = 0; ii < i; ii++) {
789 if (im->gdes[ii].gf != GF_DEF)
791 if ((strcmp(im->gdes[i].rrd, im->gdes[ii].rrd) == 0)
792 && (im->gdes[i].cf == im->gdes[ii].cf)
793 && (im->gdes[i].cf_reduce == im->gdes[ii].cf_reduce)
794 && (im->gdes[i].start_orig == im->gdes[ii].start_orig)
795 && (im->gdes[i].end_orig == im->gdes[ii].end_orig)
796 && (im->gdes[i].step_orig == im->gdes[ii].step_orig)) {
797 /* OK, the data is already there.
798 ** Just copy the header portion
800 im->gdes[i].start = im->gdes[ii].start;
801 im->gdes[i].end = im->gdes[ii].end;
802 im->gdes[i].step = im->gdes[ii].step;
803 im->gdes[i].ds_cnt = im->gdes[ii].ds_cnt;
804 im->gdes[i].ds_namv = im->gdes[ii].ds_namv;
805 im->gdes[i].data = im->gdes[ii].data;
806 im->gdes[i].data_first = 0;
813 unsigned long ft_step = im->gdes[i].step; /* ft_step will record what we got from fetch */
815 if ((rrd_fetch_fn(im->gdes[i].rrd,
821 &im->gdes[i].ds_namv,
822 &im->gdes[i].data)) == -1) {
825 im->gdes[i].data_first = 1;
827 if (ft_step < im->gdes[i].step) {
828 reduce_data(im->gdes[i].cf_reduce,
833 &im->gdes[i].ds_cnt, &im->gdes[i].data);
835 im->gdes[i].step = ft_step;
839 /* lets see if the required data source is really there */
840 for (ii = 0; ii < (int) im->gdes[i].ds_cnt; ii++) {
841 if (strcmp(im->gdes[i].ds_namv[ii], im->gdes[i].ds_nam) == 0) {
845 if (im->gdes[i].ds == -1) {
846 rrd_set_error("No DS called '%s' in '%s'",
847 im->gdes[i].ds_nam, im->gdes[i].rrd);
855 /* evaluate the expressions in the CDEF functions */
857 /*************************************************************
859 *************************************************************/
861 long find_var_wrapper(
865 return find_var((image_desc_t *) arg1, key);
868 /* find gdes containing var*/
875 for (ii = 0; ii < im->gdes_c - 1; ii++) {
876 if ((im->gdes[ii].gf == GF_DEF
877 || im->gdes[ii].gf == GF_VDEF || im->gdes[ii].gf == GF_CDEF)
878 && (strcmp(im->gdes[ii].vname, key) == 0)) {
885 /* find the largest common denominator for all the numbers
886 in the 0 terminated num array */
893 for (i = 0; num[i + 1] != 0; i++) {
895 rest = num[i] % num[i + 1];
901 /* return i==0?num[i]:num[i-1]; */
905 /* run the rpn calculator on all the VDEF and CDEF arguments */
912 long *steparray, rpi;
917 rpnstack_init(&rpnstack);
919 for (gdi = 0; gdi < im->gdes_c; gdi++) {
920 /* Look for GF_VDEF and GF_CDEF in the same loop,
921 * so CDEFs can use VDEFs and vice versa
923 switch (im->gdes[gdi].gf) {
927 graph_desc_t *vdp = &im->gdes[im->gdes[gdi].vidx];
929 /* remove current shift */
930 vdp->start -= vdp->shift;
931 vdp->end -= vdp->shift;
934 if (im->gdes[gdi].shidx >= 0)
935 vdp->shift = im->gdes[im->gdes[gdi].shidx].vf.val;
938 vdp->shift = im->gdes[gdi].shval;
940 /* normalize shift to multiple of consolidated step */
941 vdp->shift = (vdp->shift / (long) vdp->step) * (long) vdp->step;
944 vdp->start += vdp->shift;
945 vdp->end += vdp->shift;
949 /* A VDEF has no DS. This also signals other parts
950 * of rrdtool that this is a VDEF value, not a CDEF.
952 im->gdes[gdi].ds_cnt = 0;
953 if (vdef_calc(im, gdi)) {
954 rrd_set_error("Error processing VDEF '%s'",
955 im->gdes[gdi].vname);
956 rpnstack_free(&rpnstack);
961 im->gdes[gdi].ds_cnt = 1;
962 im->gdes[gdi].ds = 0;
963 im->gdes[gdi].data_first = 1;
964 im->gdes[gdi].start = 0;
965 im->gdes[gdi].end = 0;
970 /* Find the variables in the expression.
971 * - VDEF variables are substituted by their values
972 * and the opcode is changed into OP_NUMBER.
973 * - CDEF variables are analized for their step size,
974 * the lowest common denominator of all the step
975 * sizes of the data sources involved is calculated
976 * and the resulting number is the step size for the
977 * resulting data source.
979 for (rpi = 0; im->gdes[gdi].rpnp[rpi].op != OP_END; rpi++) {
980 if (im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
981 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER) {
982 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
984 if (im->gdes[ptr].ds_cnt == 0) { /* this is a VDEF data source */
987 ("DEBUG: inside CDEF '%s' processing VDEF '%s'\n",
988 im->gdes[gdi].vname, im->gdes[ptr].vname);
989 printf("DEBUG: value from vdef is %f\n",
990 im->gdes[ptr].vf.val);
992 im->gdes[gdi].rpnp[rpi].val = im->gdes[ptr].vf.val;
993 im->gdes[gdi].rpnp[rpi].op = OP_NUMBER;
994 } else { /* normal variables and PREF(variables) */
996 /* add one entry to the array that keeps track of the step sizes of the
997 * data sources going into the CDEF. */
999 rrd_realloc(steparray,
1001 1) * sizeof(*steparray))) == NULL) {
1002 rrd_set_error("realloc steparray");
1003 rpnstack_free(&rpnstack);
1007 steparray[stepcnt - 1] = im->gdes[ptr].step;
1009 /* adjust start and end of cdef (gdi) so
1010 * that it runs from the latest start point
1011 * to the earliest endpoint of any of the
1012 * rras involved (ptr)
1015 if (im->gdes[gdi].start < im->gdes[ptr].start)
1016 im->gdes[gdi].start = im->gdes[ptr].start;
1018 if (im->gdes[gdi].end == 0 ||
1019 im->gdes[gdi].end > im->gdes[ptr].end)
1020 im->gdes[gdi].end = im->gdes[ptr].end;
1022 /* store pointer to the first element of
1023 * the rra providing data for variable,
1024 * further save step size and data source
1027 im->gdes[gdi].rpnp[rpi].data =
1028 im->gdes[ptr].data + im->gdes[ptr].ds;
1029 im->gdes[gdi].rpnp[rpi].step = im->gdes[ptr].step;
1030 im->gdes[gdi].rpnp[rpi].ds_cnt = im->gdes[ptr].ds_cnt;
1032 /* backoff the *.data ptr; this is done so
1033 * rpncalc() function doesn't have to treat
1034 * the first case differently
1036 } /* if ds_cnt != 0 */
1037 } /* if OP_VARIABLE */
1038 } /* loop through all rpi */
1040 /* move the data pointers to the correct period */
1041 for (rpi = 0; im->gdes[gdi].rpnp[rpi].op != OP_END; rpi++) {
1042 if (im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
1043 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER) {
1044 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
1046 im->gdes[gdi].start - im->gdes[ptr].start;
1049 im->gdes[gdi].rpnp[rpi].data +=
1050 (diff / im->gdes[ptr].step) *
1051 im->gdes[ptr].ds_cnt;
1055 if (steparray == NULL) {
1056 rrd_set_error("rpn expressions without DEF"
1057 " or CDEF variables are not supported");
1058 rpnstack_free(&rpnstack);
1061 steparray[stepcnt] = 0;
1062 /* Now find the resulting step. All steps in all
1063 * used RRAs have to be visited
1065 im->gdes[gdi].step = lcd(steparray);
1067 if ((im->gdes[gdi].data = malloc(((im->gdes[gdi].end -
1068 im->gdes[gdi].start)
1069 / im->gdes[gdi].step)
1070 * sizeof(double))) == NULL) {
1071 rrd_set_error("malloc im->gdes[gdi].data");
1072 rpnstack_free(&rpnstack);
1076 /* Step through the new cdef results array and
1077 * calculate the values
1079 for (now = im->gdes[gdi].start + im->gdes[gdi].step;
1080 now <= im->gdes[gdi].end; now += im->gdes[gdi].step) {
1081 rpnp_t *rpnp = im->gdes[gdi].rpnp;
1083 /* 3rd arg of rpn_calc is for OP_VARIABLE lookups;
1084 * in this case we are advancing by timesteps;
1085 * we use the fact that time_t is a synonym for long
1087 if (rpn_calc(rpnp, &rpnstack, (long) now,
1088 im->gdes[gdi].data, ++dataidx) == -1) {
1089 /* rpn_calc sets the error string */
1090 rpnstack_free(&rpnstack);
1093 } /* enumerate over time steps within a CDEF */
1098 } /* enumerate over CDEFs */
1099 rpnstack_free(&rpnstack);
1103 /* massage data so, that we get one value for each x coordinate in the graph */
1108 double pixstep = (double) (im->end - im->start)
1109 / (double) im->xsize; /* how much time
1110 passes in one pixel */
1112 double minval = DNAN, maxval = DNAN;
1114 unsigned long gr_time;
1116 /* memory for the processed data */
1117 for (i = 0; i < im->gdes_c; i++) {
1118 if ((im->gdes[i].gf == GF_LINE) ||
1119 (im->gdes[i].gf == GF_AREA) || (im->gdes[i].gf == GF_TICK)) {
1120 if ((im->gdes[i].p_data = malloc((im->xsize + 1)
1121 * sizeof(rrd_value_t))) == NULL) {
1122 rrd_set_error("malloc data_proc");
1128 for (i = 0; i < im->xsize; i++) { /* for each pixel */
1131 gr_time = im->start + pixstep * i; /* time of the current step */
1134 for (ii = 0; ii < im->gdes_c; ii++) {
1137 switch (im->gdes[ii].gf) {
1141 if (!im->gdes[ii].stack)
1143 value = im->gdes[ii].yrule;
1144 if (isnan(value) || (im->gdes[ii].gf == GF_TICK)) {
1145 /* The time of the data doesn't necessarily match
1146 ** the time of the graph. Beware.
1148 vidx = im->gdes[ii].vidx;
1149 if (im->gdes[vidx].gf == GF_VDEF) {
1150 value = im->gdes[vidx].vf.val;
1152 if (((long int) gr_time >=
1153 (long int) im->gdes[vidx].start)
1154 && ((long int) gr_time <=
1155 (long int) im->gdes[vidx].end)) {
1156 value = im->gdes[vidx].data[(unsigned long)
1162 im->gdes[vidx].step)
1163 * im->gdes[vidx].ds_cnt +
1170 if (!isnan(value)) {
1172 im->gdes[ii].p_data[i] = paintval;
1173 /* GF_TICK: the data values are not
1174 ** relevant for min and max
1176 if (finite(paintval) && im->gdes[ii].gf != GF_TICK) {
1177 if ((isnan(minval) || paintval < minval) &&
1178 !(im->logarithmic && paintval <= 0.0))
1180 if (isnan(maxval) || paintval > maxval)
1184 im->gdes[ii].p_data[i] = DNAN;
1189 ("STACK should already be turned into LINE or AREA here");
1198 /* if min or max have not been asigned a value this is because
1199 there was no data in the graph ... this is not good ...
1200 lets set these to dummy values then ... */
1202 if (im->logarithmic) {
1214 /* adjust min and max values */
1215 if (isnan(im->minval)
1216 /* don't adjust low-end with log scale *//* why not? */
1217 || ((!im->rigid) && im->minval > minval)
1219 if (im->logarithmic)
1220 im->minval = minval * 0.5;
1222 im->minval = minval;
1224 if (isnan(im->maxval)
1225 || (!im->rigid && im->maxval < maxval)
1227 if (im->logarithmic)
1228 im->maxval = maxval * 2.0;
1230 im->maxval = maxval;
1232 /* make sure min is smaller than max */
1233 if (im->minval > im->maxval) {
1234 im->minval = 0.99 * im->maxval;
1237 /* make sure min and max are not equal */
1238 if (im->minval == im->maxval) {
1240 if (!im->logarithmic) {
1243 /* make sure min and max are not both zero */
1244 if (im->maxval == 0.0) {
1253 /* identify the point where the first gridline, label ... gets placed */
1255 time_t find_first_time(
1256 time_t start, /* what is the initial time */
1257 enum tmt_en baseint, /* what is the basic interval */
1258 long basestep /* how many if these do we jump a time */
1263 localtime_r(&start, &tm);
1267 tm. tm_sec -= tm.tm_sec % basestep;
1272 tm. tm_min -= tm.tm_min % basestep;
1278 tm. tm_hour -= tm.tm_hour % basestep;
1282 /* we do NOT look at the basestep for this ... */
1289 /* we do NOT look at the basestep for this ... */
1293 tm. tm_mday -= tm.tm_wday - 1; /* -1 because we want the monday */
1295 if (tm.tm_wday == 0)
1296 tm. tm_mday -= 7; /* we want the *previous* monday */
1304 tm. tm_mon -= tm.tm_mon % basestep;
1315 tm.tm_year + 1900) %basestep;
1321 /* identify the point where the next gridline, label ... gets placed */
1322 time_t find_next_time(
1323 time_t current, /* what is the initial time */
1324 enum tmt_en baseint, /* what is the basic interval */
1325 long basestep /* how many if these do we jump a time */
1331 localtime_r(¤t, &tm);
1336 tm. tm_sec += basestep;
1340 tm. tm_min += basestep;
1344 tm. tm_hour += basestep;
1348 tm. tm_mday += basestep;
1352 tm. tm_mday += 7 * basestep;
1356 tm. tm_mon += basestep;
1360 tm. tm_year += basestep;
1362 madetime = mktime(&tm);
1363 } while (madetime == -1); /* this is necessary to skip impssible times
1364 like the daylight saving time skips */
1370 /* calculate values required for PRINT and GPRINT functions */
1376 long i, ii, validsteps;
1379 int graphelement = 0;
1382 double magfact = -1;
1387 /* wow initializing tmvdef is quite a task :-) */
1388 time_t now = time(NULL);
1390 localtime_r(&now, &tmvdef);
1393 for (i = 0; i < im->gdes_c; i++) {
1394 vidx = im->gdes[i].vidx;
1395 switch (im->gdes[i].gf) {
1399 rrd_realloc((*prdata), prlines * sizeof(char *))) == NULL) {
1400 rrd_set_error("realloc prdata");
1404 /* PRINT and GPRINT can now print VDEF generated values.
1405 * There's no need to do any calculations on them as these
1406 * calculations were already made.
1408 if (im->gdes[vidx].gf == GF_VDEF) { /* simply use vals */
1409 printval = im->gdes[vidx].vf.val;
1410 localtime_r(&im->gdes[vidx].vf.when, &tmvdef);
1411 } else { /* need to calculate max,min,avg etcetera */
1412 max_ii = ((im->gdes[vidx].end - im->gdes[vidx].start)
1413 / im->gdes[vidx].step * im->gdes[vidx].ds_cnt);
1416 for (ii = im->gdes[vidx].ds;
1417 ii < max_ii; ii += im->gdes[vidx].ds_cnt) {
1418 if (!finite(im->gdes[vidx].data[ii]))
1420 if (isnan(printval)) {
1421 printval = im->gdes[vidx].data[ii];
1426 switch (im->gdes[i].cf) {
1429 case CF_DEVSEASONAL:
1433 printval += im->gdes[vidx].data[ii];
1436 printval = min(printval, im->gdes[vidx].data[ii]);
1440 printval = max(printval, im->gdes[vidx].data[ii]);
1443 printval = im->gdes[vidx].data[ii];
1446 if (im->gdes[i].cf == CF_AVERAGE || im->gdes[i].cf > CF_LAST) {
1447 if (validsteps > 1) {
1448 printval = (printval / validsteps);
1451 } /* prepare printval */
1453 if ((percent_s = strstr(im->gdes[i].format, "%S")) != NULL) {
1454 /* Magfact is set to -1 upon entry to print_calc. If it
1455 * is still less than 0, then we need to run auto_scale.
1456 * Otherwise, put the value into the correct units. If
1457 * the value is 0, then do not set the symbol or magnification
1458 * so next the calculation will be performed again. */
1459 if (magfact < 0.0) {
1460 auto_scale(im, &printval, &si_symb, &magfact);
1461 if (printval == 0.0)
1464 printval /= magfact;
1466 *(++percent_s) = 's';
1467 } else if (strstr(im->gdes[i].format, "%s") != NULL) {
1468 auto_scale(im, &printval, &si_symb, &magfact);
1471 if (im->gdes[i].gf == GF_PRINT) {
1472 (*prdata)[prlines - 2] =
1473 malloc((FMT_LEG_LEN + 2) * sizeof(char));
1474 (*prdata)[prlines - 1] = NULL;
1475 if (im->gdes[i].strftm) {
1476 strftime((*prdata)[prlines - 2], FMT_LEG_LEN,
1477 im->gdes[i].format, &tmvdef);
1479 if (bad_format(im->gdes[i].format)) {
1480 rrd_set_error("bad format for PRINT in '%s'",
1481 im->gdes[i].format);
1484 #ifdef HAVE_SNPRINTF
1485 snprintf((*prdata)[prlines - 2], FMT_LEG_LEN,
1486 im->gdes[i].format, printval, si_symb);
1488 sprintf((*prdata)[prlines - 2], im->gdes[i].format,
1495 if (im->gdes[i].strftm) {
1496 strftime(im->gdes[i].legend, FMT_LEG_LEN,
1497 im->gdes[i].format, &tmvdef);
1499 if (bad_format(im->gdes[i].format)) {
1500 rrd_set_error("bad format for GPRINT in '%s'",
1501 im->gdes[i].format);
1504 #ifdef HAVE_SNPRINTF
1505 snprintf(im->gdes[i].legend, FMT_LEG_LEN - 2,
1506 im->gdes[i].format, printval, si_symb);
1508 sprintf(im->gdes[i].legend, im->gdes[i].format, printval,
1521 if (isnan(im->gdes[i].yrule)) { /* we must set this here or the legend printer can not decide to print the legend */
1522 im->gdes[i].yrule = im->gdes[vidx].vf.val;
1527 if (im->gdes[i].xrule == 0) { /* again ... the legend printer needs it */
1528 im->gdes[i].xrule = im->gdes[vidx].vf.when;
1536 #ifdef WITH_PIECHART
1544 ("STACK should already be turned into LINE or AREA here");
1549 return graphelement;
1553 /* place legends with color spots */
1559 int interleg = im->text_prop[TEXT_PROP_LEGEND].size * 2.0;
1560 int border = im->text_prop[TEXT_PROP_LEGEND].size * 2.0;
1561 int fill = 0, fill_last;
1563 int leg_x = border, leg_y = im->yimg;
1564 int leg_y_prev = im->yimg;
1567 int i, ii, mark = 0;
1568 char prt_fctn; /*special printfunctions */
1571 if (!(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH)) {
1572 if ((legspace = malloc(im->gdes_c * sizeof(int))) == NULL) {
1573 rrd_set_error("malloc for legspace");
1577 if (im->extra_flags & FULL_SIZE_MODE)
1578 leg_y = leg_y_prev =
1579 leg_y - (int) (im->text_prop[TEXT_PROP_LEGEND].size * 1.8);
1581 for (i = 0; i < im->gdes_c; i++) {
1584 /* hide legends for rules which are not displayed */
1586 if (!(im->extra_flags & FORCE_RULES_LEGEND)) {
1587 if (im->gdes[i].gf == GF_HRULE &&
1588 (im->gdes[i].yrule < im->minval
1589 || im->gdes[i].yrule > im->maxval))
1590 im->gdes[i].legend[0] = '\0';
1592 if (im->gdes[i].gf == GF_VRULE &&
1593 (im->gdes[i].xrule < im->start
1594 || im->gdes[i].xrule > im->end))
1595 im->gdes[i].legend[0] = '\0';
1598 leg_cc = strlen(im->gdes[i].legend);
1600 /* is there a controle code ant the end of the legend string ? */
1601 /* and it is not a tab \\t */
1602 if (leg_cc >= 2 && im->gdes[i].legend[leg_cc - 2] == '\\'
1603 && im->gdes[i].legend[leg_cc - 1] != 't') {
1604 prt_fctn = im->gdes[i].legend[leg_cc - 1];
1606 im->gdes[i].legend[leg_cc] = '\0';
1610 /* only valid control codes */
1611 if (prt_fctn != 'l' && prt_fctn != 'n' && /* a synonym for l */
1616 prt_fctn != 't' && prt_fctn != '\0' && prt_fctn != 'g') {
1618 rrd_set_error("Unknown control code at the end of '%s\\%c'",
1619 im->gdes[i].legend, prt_fctn);
1624 /* remove exess space */
1625 if (prt_fctn == 'n') {
1629 while (prt_fctn == 'g' &&
1630 leg_cc > 0 && im->gdes[i].legend[leg_cc - 1] == ' ') {
1632 im->gdes[i].legend[leg_cc] = '\0';
1635 legspace[i] = (prt_fctn == 'g' ? 0 : interleg);
1638 /* no interleg space if string ends in \g */
1639 fill += legspace[i];
1641 fill += gfx_get_text_width(im->cr, fill + border,
1642 im->text_prop[TEXT_PROP_LEGEND].
1644 im->text_prop[TEXT_PROP_LEGEND].
1646 im->gdes[i].legend);
1651 /* who said there was a special tag ... ? */
1652 if (prt_fctn == 'g') {
1655 if (prt_fctn == '\0') {
1656 if (i == im->gdes_c - 1)
1659 /* is it time to place the legends ? */
1660 if (fill > im->ximg - 2 * border) {
1675 if (prt_fctn != '\0') {
1677 if (leg_c >= 2 && prt_fctn == 'j') {
1678 glue = (im->ximg - fill - 2 * border) / (leg_c - 1);
1682 if (prt_fctn == 'c')
1683 leg_x = (im->ximg - fill) / 2.0;
1684 if (prt_fctn == 'r')
1685 leg_x = im->ximg - fill - border;
1687 for (ii = mark; ii <= i; ii++) {
1688 if (im->gdes[ii].legend[0] == '\0')
1689 continue; /* skip empty legends */
1690 im->gdes[ii].leg_x = leg_x;
1691 im->gdes[ii].leg_y = leg_y;
1693 gfx_get_text_width(im->cr, leg_x,
1694 im->text_prop[TEXT_PROP_LEGEND].
1696 im->text_prop[TEXT_PROP_LEGEND].
1698 im->gdes[ii].legend)
1703 if (im->extra_flags & FULL_SIZE_MODE) {
1704 /* only add y space if there was text on the line */
1705 if (leg_x > border || prt_fctn == 's')
1706 leg_y -= im->text_prop[TEXT_PROP_LEGEND].size * 1.8;
1707 if (prt_fctn == 's')
1708 leg_y += im->text_prop[TEXT_PROP_LEGEND].size;
1710 if (leg_x > border || prt_fctn == 's')
1711 leg_y += im->text_prop[TEXT_PROP_LEGEND].size * 1.8;
1712 if (prt_fctn == 's')
1713 leg_y -= im->text_prop[TEXT_PROP_LEGEND].size;
1721 if (im->extra_flags & FULL_SIZE_MODE) {
1722 if (leg_y != leg_y_prev) {
1723 *gY = leg_y - im->text_prop[TEXT_PROP_LEGEND].size * 1.8;
1725 leg_y - im->text_prop[TEXT_PROP_LEGEND].size * 1.8;
1728 im->yimg = leg_y_prev;
1729 /* if we did place some legends we have to add vertical space */
1730 if (leg_y != im->yimg)
1731 im->yimg += im->text_prop[TEXT_PROP_LEGEND].size * 1.8;
1738 /* create a grid on the graph. it determines what to do
1739 from the values of xsize, start and end */
1741 /* the xaxis labels are determined from the number of seconds per pixel
1742 in the requested graph */
1746 int calc_horizontal_grid(
1753 int decimals, fractionals;
1755 im->ygrid_scale.labfact = 2;
1756 range = im->maxval - im->minval;
1757 scaledrange = range / im->magfact;
1759 /* does the scale of this graph make it impossible to put lines
1760 on it? If so, give up. */
1761 if (isnan(scaledrange)) {
1765 /* find grid spaceing */
1767 if (isnan(im->ygridstep)) {
1768 if (im->extra_flags & ALTYGRID) {
1769 /* find the value with max number of digits. Get number of digits */
1772 (max(fabs(im->maxval), fabs(im->minval)) *
1773 im->viewfactor / im->magfact));
1774 if (decimals <= 0) /* everything is small. make place for zero */
1777 im->ygrid_scale.gridstep =
1779 floor(log10(range * im->viewfactor / im->magfact))) /
1780 im->viewfactor * im->magfact;
1782 if (im->ygrid_scale.gridstep == 0) /* range is one -> 0.1 is reasonable scale */
1783 im->ygrid_scale.gridstep = 0.1;
1784 /* should have at least 5 lines but no more then 15 */
1785 if (range / im->ygrid_scale.gridstep < 5)
1786 im->ygrid_scale.gridstep /= 10;
1787 if (range / im->ygrid_scale.gridstep > 15)
1788 im->ygrid_scale.gridstep *= 10;
1789 if (range / im->ygrid_scale.gridstep > 5) {
1790 im->ygrid_scale.labfact = 1;
1791 if (range / im->ygrid_scale.gridstep > 8)
1792 im->ygrid_scale.labfact = 2;
1794 im->ygrid_scale.gridstep /= 5;
1795 im->ygrid_scale.labfact = 5;
1799 (im->ygrid_scale.gridstep *
1800 (double) im->ygrid_scale.labfact * im->viewfactor /
1802 if (fractionals < 0) { /* small amplitude. */
1803 int len = decimals - fractionals + 1;
1805 if (im->unitslength < len + 2)
1806 im->unitslength = len + 2;
1807 sprintf(im->ygrid_scale.labfmt, "%%%d.%df%s", len,
1808 -fractionals, (im->symbol != ' ' ? " %c" : ""));
1810 int len = decimals + 1;
1812 if (im->unitslength < len + 2)
1813 im->unitslength = len + 2;
1814 sprintf(im->ygrid_scale.labfmt, "%%%d.0f%s", len,
1815 (im->symbol != ' ' ? " %c" : ""));
1818 for (i = 0; ylab[i].grid > 0; i++) {
1819 pixel = im->ysize / (scaledrange / ylab[i].grid);
1825 for (i = 0; i < 4; i++) {
1826 if (pixel * ylab[gridind].lfac[i] >=
1827 2.5 * im->text_prop[TEXT_PROP_AXIS].size) {
1828 im->ygrid_scale.labfact = ylab[gridind].lfac[i];
1833 im->ygrid_scale.gridstep = ylab[gridind].grid * im->magfact;
1836 im->ygrid_scale.gridstep = im->ygridstep;
1837 im->ygrid_scale.labfact = im->ylabfact;
1842 int draw_horizontal_grid(
1847 char graph_label[100];
1849 double X0 = im->xorigin;
1850 double X1 = im->xorigin + im->xsize;
1852 int sgrid = (int) (im->minval / im->ygrid_scale.gridstep - 1);
1853 int egrid = (int) (im->maxval / im->ygrid_scale.gridstep + 1);
1857 im->ygrid_scale.gridstep / (double) im->magfact *
1858 (double) im->viewfactor;
1859 MaxY = scaledstep * (double) egrid;
1860 for (i = sgrid; i <= egrid; i++) {
1861 double Y0 = ytr(im, im->ygrid_scale.gridstep * i);
1862 double YN = ytr(im, im->ygrid_scale.gridstep * (i + 1));
1864 if (floor(Y0 + 0.5) >= im->yorigin - im->ysize
1865 && floor(Y0 + 0.5) <= im->yorigin) {
1866 /* Make sure at least 2 grid labels are shown, even if it doesn't agree
1867 with the chosen settings. Add a label if required by settings, or if
1868 there is only one label so far and the next grid line is out of bounds. */
1869 if (i % im->ygrid_scale.labfact == 0
1871 && (YN < im->yorigin - im->ysize || YN > im->yorigin))) {
1872 if (im->symbol == ' ') {
1873 if (im->extra_flags & ALTYGRID) {
1874 sprintf(graph_label, im->ygrid_scale.labfmt,
1875 scaledstep * (double) i);
1878 sprintf(graph_label, "%4.1f",
1879 scaledstep * (double) i);
1881 sprintf(graph_label, "%4.0f",
1882 scaledstep * (double) i);
1886 char sisym = (i == 0 ? ' ' : im->symbol);
1888 if (im->extra_flags & ALTYGRID) {
1889 sprintf(graph_label, im->ygrid_scale.labfmt,
1890 scaledstep * (double) i, sisym);
1893 sprintf(graph_label, "%4.1f %c",
1894 scaledstep * (double) i, sisym);
1896 sprintf(graph_label, "%4.0f %c",
1897 scaledstep * (double) i, sisym);
1904 X0 - im->text_prop[TEXT_PROP_AXIS].size, Y0,
1905 im->graph_col[GRC_FONT],
1906 im->text_prop[TEXT_PROP_AXIS].font,
1907 im->text_prop[TEXT_PROP_AXIS].size,
1908 im->tabwidth, 0.0, GFX_H_RIGHT, GFX_V_CENTER,
1912 X0, Y0, MGRIDWIDTH, im->graph_col[GRC_MGRID]);
1915 X1 + 2, Y0, MGRIDWIDTH, im->graph_col[GRC_MGRID]);
1916 gfx_dashed_line(im->cr,
1919 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1920 im->grid_dash_on, im->grid_dash_off);
1922 } else if (!(im->extra_flags & NOMINOR)) {
1925 X0, Y0, GRIDWIDTH, im->graph_col[GRC_GRID]);
1928 X1 + 2, Y0, GRIDWIDTH, im->graph_col[GRC_GRID]);
1929 gfx_dashed_line(im->cr,
1932 GRIDWIDTH, im->graph_col[GRC_GRID],
1933 im->grid_dash_on, im->grid_dash_off);
1941 /* this is frexp for base 10 */
1952 iexp = floor(log(fabs(x)) / log(10));
1953 mnt = x / pow(10.0, iexp);
1956 mnt = x / pow(10.0, iexp);
1962 static int AlmostEqual2sComplement(
1968 int aInt = *(int *) &A;
1969 int bInt = *(int *) &B;
1972 /* Make sure maxUlps is non-negative and small enough that the
1973 default NAN won't compare as equal to anything. */
1975 /* assert(maxUlps > 0 && maxUlps < 4 * 1024 * 1024); */
1977 /* Make aInt lexicographically ordered as a twos-complement int */
1980 aInt = 0x80000000l - aInt;
1982 /* Make bInt lexicographically ordered as a twos-complement int */
1985 bInt = 0x80000000l - bInt;
1987 intDiff = abs(aInt - bInt);
1989 if (intDiff <= maxUlps)
1995 /* logaritmic horizontal grid */
1996 int horizontal_log_grid(
1999 double yloglab[][10] = {
2000 {1.0, 10., 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0},
2001 {1.0, 5.0, 10., 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0},
2002 {1.0, 2.0, 5.0, 7.0, 10., 0.0, 0.0, 0.0, 0.0, 0.0},
2003 {1.0, 2.0, 4.0, 6.0, 8.0, 10., 0.0, 0.0, 0.0, 0.0},
2004 {1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.},
2005 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0} /* last line */
2008 int i, j, val_exp, min_exp;
2009 double nex; /* number of decades in data */
2010 double logscale; /* scale in logarithmic space */
2011 int exfrac = 1; /* decade spacing */
2012 int mid = -1; /* row in yloglab for major grid */
2013 double mspac; /* smallest major grid spacing (pixels) */
2014 int flab; /* first value in yloglab to use */
2015 double value, tmp, pre_value;
2017 char graph_label[100];
2019 nex = log10(im->maxval / im->minval);
2020 logscale = im->ysize / nex;
2022 /* major spacing for data with high dynamic range */
2023 while (logscale * exfrac < 3 * im->text_prop[TEXT_PROP_LEGEND].size) {
2030 /* major spacing for less dynamic data */
2032 /* search best row in yloglab */
2034 for (i = 0; yloglab[mid][i + 1] < 10.0; i++);
2035 mspac = logscale * log10(10.0 / yloglab[mid][i]);
2036 } while (mspac > 2 * im->text_prop[TEXT_PROP_LEGEND].size
2037 && yloglab[mid][0] > 0);
2041 /* find first value in yloglab */
2043 yloglab[mid][flab] < 10
2044 && frexp10(im->minval, &tmp) > yloglab[mid][flab]; flab++);
2045 if (yloglab[mid][flab] == 10.0) {
2050 if (val_exp % exfrac)
2051 val_exp += abs(-val_exp % exfrac);
2054 X1 = im->xorigin + im->xsize;
2060 value = yloglab[mid][flab] * pow(10.0, val_exp);
2061 if (AlmostEqual2sComplement(value, pre_value, 4))
2062 break; /* it seems we are not converging */
2066 Y0 = ytr(im, value);
2067 if (floor(Y0 + 0.5) <= im->yorigin - im->ysize)
2070 /* major grid line */
2073 X0 - 2, Y0, X0, Y0, MGRIDWIDTH, im->graph_col[GRC_MGRID]);
2075 X1, Y0, X1 + 2, Y0, MGRIDWIDTH, im->graph_col[GRC_MGRID]);
2078 gfx_dashed_line(im->cr,
2081 MGRIDWIDTH, im->graph_col[GRC_MGRID],
2082 im->grid_dash_on, im->grid_dash_off);
2085 if (im->extra_flags & FORCE_UNITS_SI) {
2090 scale = floor(val_exp / 3.0);
2092 pvalue = pow(10.0, val_exp % 3);
2094 pvalue = pow(10.0, ((val_exp + 1) % 3) + 2);
2095 pvalue *= yloglab[mid][flab];
2097 if (((scale + si_symbcenter) < (int) sizeof(si_symbol)) &&
2098 ((scale + si_symbcenter) >= 0))
2099 symbol = si_symbol[scale + si_symbcenter];
2103 sprintf(graph_label, "%3.0f %c", pvalue, symbol);
2105 sprintf(graph_label, "%3.0e", value);
2107 X0 - im->text_prop[TEXT_PROP_AXIS].size, Y0,
2108 im->graph_col[GRC_FONT],
2109 im->text_prop[TEXT_PROP_AXIS].font,
2110 im->text_prop[TEXT_PROP_AXIS].size,
2111 im->tabwidth, 0.0, GFX_H_RIGHT, GFX_V_CENTER, graph_label);
2114 if (mid < 4 && exfrac == 1) {
2115 /* find first and last minor line behind current major line
2116 * i is the first line and j tha last */
2118 min_exp = val_exp - 1;
2119 for (i = 1; yloglab[mid][i] < 10.0; i++);
2120 i = yloglab[mid][i - 1] + 1;
2124 i = yloglab[mid][flab - 1] + 1;
2125 j = yloglab[mid][flab];
2128 /* draw minor lines below current major line */
2129 for (; i < j; i++) {
2131 value = i * pow(10.0, min_exp);
2132 if (value < im->minval)
2135 Y0 = ytr(im, value);
2136 if (floor(Y0 + 0.5) <= im->yorigin - im->ysize)
2142 X0, Y0, GRIDWIDTH, im->graph_col[GRC_GRID]);
2145 X1 + 2, Y0, GRIDWIDTH, im->graph_col[GRC_GRID]);
2146 gfx_dashed_line(im->cr,
2149 GRIDWIDTH, im->graph_col[GRC_GRID],
2150 im->grid_dash_on, im->grid_dash_off);
2152 } else if (exfrac > 1) {
2153 for (i = val_exp - exfrac / 3 * 2; i < val_exp; i += exfrac / 3) {
2154 value = pow(10.0, i);
2155 if (value < im->minval)
2158 Y0 = ytr(im, value);
2159 if (floor(Y0 + 0.5) <= im->yorigin - im->ysize)
2165 X0, Y0, GRIDWIDTH, im->graph_col[GRC_GRID]);
2168 X1 + 2, Y0, GRIDWIDTH, im->graph_col[GRC_GRID]);
2169 gfx_dashed_line(im->cr,
2172 GRIDWIDTH, im->graph_col[GRC_GRID],
2173 im->grid_dash_on, im->grid_dash_off);
2178 if (yloglab[mid][++flab] == 10.0) {
2184 /* draw minor lines after highest major line */
2185 if (mid < 4 && exfrac == 1) {
2186 /* find first and last minor line below current major line
2187 * i is the first line and j tha last */
2189 min_exp = val_exp - 1;
2190 for (i = 1; yloglab[mid][i] < 10.0; i++);
2191 i = yloglab[mid][i - 1] + 1;
2195 i = yloglab[mid][flab - 1] + 1;
2196 j = yloglab[mid][flab];
2199 /* draw minor lines below current major line */
2200 for (; i < j; i++) {
2202 value = i * pow(10.0, min_exp);
2203 if (value < im->minval)
2206 Y0 = ytr(im, value);
2207 if (floor(Y0 + 0.5) <= im->yorigin - im->ysize)
2212 X0 - 2, Y0, X0, Y0, GRIDWIDTH, im->graph_col[GRC_GRID]);
2214 X1, Y0, X1 + 2, Y0, GRIDWIDTH, im->graph_col[GRC_GRID]);
2215 gfx_dashed_line(im->cr,
2218 GRIDWIDTH, im->graph_col[GRC_GRID],
2219 im->grid_dash_on, im->grid_dash_off);
2222 /* fancy minor gridlines */
2223 else if (exfrac > 1) {
2224 for (i = val_exp - exfrac / 3 * 2; i < val_exp; i += exfrac / 3) {
2225 value = pow(10.0, i);
2226 if (value < im->minval)
2229 Y0 = ytr(im, value);
2230 if (floor(Y0 + 0.5) <= im->yorigin - im->ysize)
2235 X0 - 2, Y0, X0, Y0, GRIDWIDTH, im->graph_col[GRC_GRID]);
2237 X1, Y0, X1 + 2, Y0, GRIDWIDTH, im->graph_col[GRC_GRID]);
2238 gfx_dashed_line(im->cr,
2241 GRIDWIDTH, im->graph_col[GRC_GRID],
2242 im->grid_dash_on, im->grid_dash_off);
2253 int xlab_sel; /* which sort of label and grid ? */
2254 time_t ti, tilab, timajor;
2256 char graph_label[100];
2257 double X0, Y0, Y1; /* points for filled graph and more */
2260 /* the type of time grid is determined by finding
2261 the number of seconds per pixel in the graph */
2264 if (im->xlab_user.minsec == -1) {
2265 factor = (im->end - im->start) / im->xsize;
2267 while (xlab[xlab_sel + 1].minsec != -1
2268 && xlab[xlab_sel + 1].minsec <= factor) {
2270 } /* pick the last one */
2271 while (xlab[xlab_sel - 1].minsec == xlab[xlab_sel].minsec
2272 && xlab[xlab_sel].length > (im->end - im->start)) {
2274 } /* go back to the smallest size */
2275 im->xlab_user.gridtm = xlab[xlab_sel].gridtm;
2276 im->xlab_user.gridst = xlab[xlab_sel].gridst;
2277 im->xlab_user.mgridtm = xlab[xlab_sel].mgridtm;
2278 im->xlab_user.mgridst = xlab[xlab_sel].mgridst;
2279 im->xlab_user.labtm = xlab[xlab_sel].labtm;
2280 im->xlab_user.labst = xlab[xlab_sel].labst;
2281 im->xlab_user.precis = xlab[xlab_sel].precis;
2282 im->xlab_user.stst = xlab[xlab_sel].stst;
2285 /* y coords are the same for every line ... */
2287 Y1 = im->yorigin - im->ysize;
2290 /* paint the minor grid */
2291 if (!(im->extra_flags & NOMINOR)) {
2292 for (ti = find_first_time(im->start,
2293 im->xlab_user.gridtm,
2294 im->xlab_user.gridst),
2295 timajor = find_first_time(im->start,
2296 im->xlab_user.mgridtm,
2297 im->xlab_user.mgridst);
2300 find_next_time(ti, im->xlab_user.gridtm, im->xlab_user.gridst)
2302 /* are we inside the graph ? */
2303 if (ti < im->start || ti > im->end)
2305 while (timajor < ti) {
2306 timajor = find_next_time(timajor,
2307 im->xlab_user.mgridtm,
2308 im->xlab_user.mgridst);
2311 continue; /* skip as falls on major grid line */
2313 gfx_line(im->cr, X0, Y1 - 2, X0, Y1, GRIDWIDTH,
2314 im->graph_col[GRC_GRID]);
2315 gfx_line(im->cr, X0, Y0, X0, Y0 + 2, GRIDWIDTH,
2316 im->graph_col[GRC_GRID]);
2317 gfx_dashed_line(im->cr, X0, Y1 - 1, X0, Y0 + 1, GRIDWIDTH,
2318 im->graph_col[GRC_GRID],
2319 im->grid_dash_on, im->grid_dash_off);
2324 /* paint the major grid */
2325 for (ti = find_first_time(im->start,
2326 im->xlab_user.mgridtm,
2327 im->xlab_user.mgridst);
2329 ti = find_next_time(ti, im->xlab_user.mgridtm, im->xlab_user.mgridst)
2331 /* are we inside the graph ? */
2332 if (ti < im->start || ti > im->end)
2335 gfx_line(im->cr, X0, Y1 - 2, X0, Y1, MGRIDWIDTH,
2336 im->graph_col[GRC_MGRID]);
2337 gfx_line(im->cr, X0, Y0, X0, Y0 + 3, MGRIDWIDTH,
2338 im->graph_col[GRC_MGRID]);
2339 gfx_dashed_line(im->cr, X0, Y1 - 2, X0, Y0 + 3, MGRIDWIDTH,
2340 im->graph_col[GRC_MGRID],
2341 im->grid_dash_on, im->grid_dash_off);
2344 /* paint the labels below the graph */
2345 for (ti = find_first_time(im->start - im->xlab_user.precis / 2,
2346 im->xlab_user.labtm,
2347 im->xlab_user.labst);
2348 ti <= im->end - im->xlab_user.precis / 2;
2349 ti = find_next_time(ti, im->xlab_user.labtm, im->xlab_user.labst)
2351 tilab = ti + im->xlab_user.precis / 2; /* correct time for the label */
2352 /* are we inside the graph ? */
2353 if (tilab < im->start || tilab > im->end)
2357 localtime_r(&tilab, &tm);
2358 strftime(graph_label, 99, im->xlab_user.stst, &tm);
2360 # error "your libc has no strftime I guess we'll abort the exercise here."
2365 im->graph_col[GRC_FONT],
2366 im->text_prop[TEXT_PROP_AXIS].font,
2367 im->text_prop[TEXT_PROP_AXIS].size, im->tabwidth, 0.0,
2368 GFX_H_CENTER, GFX_V_TOP, graph_label);
2378 /* draw x and y axis */
2379 /* gfx_line ( im->canvas, im->xorigin+im->xsize,im->yorigin,
2380 im->xorigin+im->xsize,im->yorigin-im->ysize,
2381 GRIDWIDTH, im->graph_col[GRC_AXIS]);
2383 gfx_line ( im->canvas, im->xorigin,im->yorigin-im->ysize,
2384 im->xorigin+im->xsize,im->yorigin-im->ysize,
2385 GRIDWIDTH, im->graph_col[GRC_AXIS]); */
2387 gfx_line(im->cr, im->xorigin - 4, im->yorigin,
2388 im->xorigin + im->xsize + 4, im->yorigin,
2389 MGRIDWIDTH, im->graph_col[GRC_AXIS]);
2391 gfx_line(im->cr, im->xorigin, im->yorigin + 4,
2392 im->xorigin, im->yorigin - im->ysize - 4,
2393 MGRIDWIDTH, im->graph_col[GRC_AXIS]);
2396 /* arrow for X and Y axis direction */
2397 gfx_new_area(im->cr, im->xorigin + im->xsize + 2, im->yorigin - 2, im->xorigin + im->xsize + 2, im->yorigin + 3, im->xorigin + im->xsize + 7, im->yorigin + 0.5, /* LINEOFFSET */
2398 im->graph_col[GRC_ARROW]);
2399 gfx_close_path(im->cr);
2401 gfx_new_area(im->cr, im->xorigin - 2, im->yorigin - im->ysize - 2, im->xorigin + 3, im->yorigin - im->ysize - 2, im->xorigin + 0.5, im->yorigin - im->ysize - 7, /* LINEOFFSET */
2402 im->graph_col[GRC_ARROW]);
2403 gfx_close_path(im->cr);
2413 double X0, Y0; /* points for filled graph and more */
2414 struct gfx_color_t water_color;
2416 /* draw 3d border */
2417 gfx_new_area(im->cr, 0, im->yimg,
2418 2, im->yimg - 2, 2, 2, im->graph_col[GRC_SHADEA]);
2419 gfx_add_point(im->cr, im->ximg - 2, 2);
2420 gfx_add_point(im->cr, im->ximg, 0);
2421 gfx_add_point(im->cr, 0, 0);
2422 gfx_close_path(im->cr);
2424 gfx_new_area(im->cr, 2, im->yimg - 2,
2425 im->ximg - 2, im->yimg - 2,
2426 im->ximg - 2, 2, im->graph_col[GRC_SHADEB]);
2427 gfx_add_point(im->cr, im->ximg, 0);
2428 gfx_add_point(im->cr, im->ximg, im->yimg);
2429 gfx_add_point(im->cr, 0, im->yimg);
2430 gfx_close_path(im->cr);
2433 if (im->draw_x_grid == 1)
2436 if (im->draw_y_grid == 1) {
2437 if (im->logarithmic) {
2438 res = horizontal_log_grid(im);
2440 res = draw_horizontal_grid(im);
2443 /* dont draw horizontal grid if there is no min and max val */
2445 char *nodata = "No Data found";
2447 gfx_text(im->cr, im->ximg / 2,
2448 (2 * im->yorigin - im->ysize) / 2,
2449 im->graph_col[GRC_FONT],
2450 im->text_prop[TEXT_PROP_AXIS].font,
2451 im->text_prop[TEXT_PROP_AXIS].size, im->tabwidth,
2452 0.0, GFX_H_CENTER, GFX_V_CENTER, nodata);
2456 /* yaxis unit description */
2458 10, (im->yorigin - im->ysize / 2),
2459 im->graph_col[GRC_FONT],
2460 im->text_prop[TEXT_PROP_UNIT].font,
2461 im->text_prop[TEXT_PROP_UNIT].size, im->tabwidth,
2462 RRDGRAPH_YLEGEND_ANGLE, GFX_H_CENTER, GFX_V_CENTER, im->ylegend);
2467 im->graph_col[GRC_FONT],
2468 im->text_prop[TEXT_PROP_TITLE].font,
2469 im->text_prop[TEXT_PROP_TITLE].size, im->tabwidth, 0.0,
2470 GFX_H_CENTER, GFX_V_TOP, im->title);
2471 /* rrdtool 'logo' */
2472 water_color = im->graph_col[GRC_FONT];
2473 water_color.alpha = 0.3;
2477 im->text_prop[TEXT_PROP_AXIS].font,
2478 5.5, im->tabwidth, -90,
2479 GFX_H_LEFT, GFX_V_TOP, "RRDTOOL / TOBI OETIKER");
2481 /* graph watermark */
2482 if (im->watermark[0] != '\0') {
2484 im->ximg / 2, im->yimg - 6,
2486 im->text_prop[TEXT_PROP_AXIS].font,
2487 5.5, im->tabwidth, 0,
2488 GFX_H_CENTER, GFX_V_BOTTOM, im->watermark);
2492 if (!(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH)) {
2493 for (i = 0; i < im->gdes_c; i++) {
2494 if (im->gdes[i].legend[0] == '\0')
2497 /* im->gdes[i].leg_y is the bottom of the legend */
2498 X0 = im->gdes[i].leg_x;
2499 Y0 = im->gdes[i].leg_y;
2500 gfx_text(im->cr, X0, Y0,
2501 im->graph_col[GRC_FONT],
2502 im->text_prop[TEXT_PROP_LEGEND].font,
2503 im->text_prop[TEXT_PROP_LEGEND].size,
2504 im->tabwidth, 0.0, GFX_H_LEFT, GFX_V_BOTTOM,
2505 im->gdes[i].legend);
2506 /* The legend for GRAPH items starts with "M " to have
2507 enough space for the box */
2508 if (im->gdes[i].gf != GF_PRINT &&
2509 im->gdes[i].gf != GF_GPRINT && im->gdes[i].gf != GF_COMMENT) {
2512 boxH = gfx_get_text_width(im->cr, 0,
2513 im->text_prop[TEXT_PROP_LEGEND].
2515 im->text_prop[TEXT_PROP_LEGEND].
2516 size, im->tabwidth, "o") * 1.2;
2519 /* shift the box up a bit */
2522 /* make sure transparent colors show up the same way as in the graph */
2524 gfx_new_area(im->cr,
2526 X0, Y0, X0 + boxH, Y0, im->graph_col[GRC_BACK]);
2527 gfx_add_point(im->cr, X0 + boxH, Y0 - boxV);
2528 gfx_close_path(im->cr);
2530 gfx_new_area(im->cr,
2532 X0, Y0, X0 + boxH, Y0, im->gdes[i].col);
2533 gfx_add_point(im->cr, X0 + boxH, Y0 - boxV);
2534 gfx_close_path(im->cr);
2538 X0, Y0, 1.0, im->graph_col[GRC_FRAME]);
2541 X0 + boxH, Y0, 1.0, im->graph_col[GRC_FRAME]);
2544 X0 + boxH, Y0 - boxV, 1.0, im->graph_col[GRC_FRAME]);
2546 X0 + boxH, Y0 - boxV,
2547 X0, Y0 - boxV, 1.0, im->graph_col[GRC_FRAME]);
2554 /*****************************************************
2555 * lazy check make sure we rely need to create this graph
2556 *****************************************************/
2563 struct stat imgstat;
2566 return 0; /* no lazy option */
2567 if (stat(im->graphfile, &imgstat) != 0)
2568 return 0; /* can't stat */
2569 /* one pixel in the existing graph is more then what we would
2571 if (time(NULL) - imgstat.st_mtime > (im->end - im->start) / im->xsize)
2573 if ((fd = fopen(im->graphfile, "rb")) == NULL)
2574 return 0; /* the file does not exist */
2575 switch (im->imgformat) {
2577 size = PngSize(fd, &(im->ximg), &(im->yimg));
2587 int graph_size_location(
2591 /* The actual size of the image to draw is determined from
2592 ** several sources. The size given on the command line is
2593 ** the graph area but we need more as we have to draw labels
2594 ** and other things outside the graph area
2597 int Xvertical = 0, Ytitle = 0, Xylabel = 0, Xmain = 0, Ymain = 0,
2598 Yxlabel = 0, Xspacing = 15, Yspacing = 15, Ywatermark = 4;
2600 if (im->extra_flags & ONLY_GRAPH) {
2602 im->ximg = im->xsize;
2603 im->yimg = im->ysize;
2604 im->yorigin = im->ysize;
2609 /** +---+--------------------------------------------+
2610 ** | y |...............graph title..................|
2611 ** | +---+-------------------------------+--------+
2614 ** | i | a | | pie |
2615 ** | s | x | main graph area | chart |
2620 ** | l | b +-------------------------------+--------+
2621 ** | e | l | x axis labels | |
2622 ** +---+---+-------------------------------+--------+
2623 ** |....................legends.....................|
2624 ** +------------------------------------------------+
2626 ** +------------------------------------------------+
2629 if (im->ylegend[0] != '\0') {
2630 Xvertical = im->text_prop[TEXT_PROP_UNIT].size * 2;
2633 if (im->title[0] != '\0') {
2634 /* The title is placed "inbetween" two text lines so it
2635 ** automatically has some vertical spacing. The horizontal
2636 ** spacing is added here, on each side.
2638 /* if necessary, reduce the font size of the title until it fits the image width */
2639 Ytitle = im->text_prop[TEXT_PROP_TITLE].size * 2.6 + 10;
2643 if (im->draw_x_grid) {
2644 Yxlabel = im->text_prop[TEXT_PROP_AXIS].size * 2.5;
2646 if (im->draw_y_grid || im->forceleftspace) {
2647 Xylabel = gfx_get_text_width(im->cr, 0,
2648 im->text_prop[TEXT_PROP_AXIS].font,
2649 im->text_prop[TEXT_PROP_AXIS].size,
2650 im->tabwidth, "0") * im->unitslength;
2654 if (im->extra_flags & FULL_SIZE_MODE) {
2655 /* The actual size of the image to draw has been determined by the user.
2656 ** The graph area is the space remaining after accounting for the legend,
2657 ** the watermark, the pie chart, the axis labels, and the title.
2660 im->ximg = im->xsize;
2661 im->yimg = im->ysize;
2662 im->yorigin = im->ysize;
2666 im->yorigin += Ytitle;
2668 /* Now calculate the total size. Insert some spacing where
2669 desired. im->xorigin and im->yorigin need to correspond
2670 with the lower left corner of the main graph area or, if
2671 this one is not set, the imaginary box surrounding the
2674 /* Initial size calculation for the main graph area */
2675 Xmain = im->ximg - (Xylabel + 2 * Xspacing);
2677 Xmain -= Xspacing; /* put space between main graph area and right edge */
2679 im->xorigin = Xspacing + Xylabel;
2681 /* the length of the title should not influence with width of the graph
2682 if (Xtitle > im->ximg) im->ximg = Xtitle; */
2684 if (Xvertical) { /* unit description */
2686 im->xorigin += Xvertical;
2691 /* The vertical size of the image is known in advance. The main graph area
2692 ** (Ymain) and im->yorigin must be set according to the space requirements
2693 ** of the legend and the axis labels.
2696 if (im->extra_flags & NOLEGEND) {
2697 /* set dimensions correctly if using full size mode with no legend */
2699 im->yimg - im->text_prop[TEXT_PROP_AXIS].size * 2.5 -
2701 Ymain = im->yorigin;
2703 /* Determine where to place the legends onto the image.
2704 ** Set Ymain and adjust im->yorigin to match the space requirements.
2706 if (leg_place(im, &Ymain) == -1)
2711 /* remove title space *or* some padding above the graph from the main graph area */
2715 Ymain -= 1.5 * Yspacing;
2718 /* watermark doesn't seem to effect the vertical size of the main graph area, oh well! */
2719 if (im->watermark[0] != '\0') {
2720 Ymain -= Ywatermark;
2725 } else { /* dimension options -width and -height refer to the dimensions of the main graph area */
2727 /* The actual size of the image to draw is determined from
2728 ** several sources. The size given on the command line is
2729 ** the graph area but we need more as we have to draw labels
2730 ** and other things outside the graph area.
2733 if (im->ylegend[0] != '\0') {
2734 Xvertical = im->text_prop[TEXT_PROP_UNIT].size * 2;
2738 if (im->title[0] != '\0') {
2739 /* The title is placed "inbetween" two text lines so it
2740 ** automatically has some vertical spacing. The horizontal
2741 ** spacing is added here, on each side.
2743 /* don't care for the with of the title
2744 Xtitle = gfx_get_text_width(im->canvas, 0,
2745 im->text_prop[TEXT_PROP_TITLE].font,
2746 im->text_prop[TEXT_PROP_TITLE].size,
2748 im->title, 0) + 2*Xspacing; */
2749 Ytitle = im->text_prop[TEXT_PROP_TITLE].size * 2.6 + 10;
2756 /* Now calculate the total size. Insert some spacing where
2757 desired. im->xorigin and im->yorigin need to correspond
2758 with the lower left corner of the main graph area or, if
2759 this one is not set, the imaginary box surrounding the
2762 /* The legend width cannot yet be determined, as a result we
2763 ** have problems adjusting the image to it. For now, we just
2764 ** forget about it at all; the legend will have to fit in the
2765 ** size already allocated.
2767 im->ximg = Xylabel + Xmain + 2 * Xspacing;
2770 im->ximg += Xspacing;
2772 im->xorigin = Xspacing + Xylabel;
2774 /* the length of the title should not influence with width of the graph
2775 if (Xtitle > im->ximg) im->ximg = Xtitle; */
2777 if (Xvertical) { /* unit description */
2778 im->ximg += Xvertical;
2779 im->xorigin += Xvertical;
2783 /* The vertical size is interesting... we need to compare
2784 ** the sum of {Ytitle, Ymain, Yxlabel, Ylegend, Ywatermark} with
2785 ** Yvertical however we need to know {Ytitle+Ymain+Yxlabel}
2786 ** in order to start even thinking about Ylegend or Ywatermark.
2788 ** Do it in three portions: First calculate the inner part,
2789 ** then do the legend, then adjust the total height of the img,
2790 ** adding space for a watermark if one exists;
2793 /* reserve space for main and/or pie */
2795 im->yimg = Ymain + Yxlabel;
2798 im->yorigin = im->yimg - Yxlabel;
2800 /* reserve space for the title *or* some padding above the graph */
2803 im->yorigin += Ytitle;
2805 im->yimg += 1.5 * Yspacing;
2806 im->yorigin += 1.5 * Yspacing;
2808 /* reserve space for padding below the graph */
2809 im->yimg += Yspacing;
2811 /* Determine where to place the legends onto the image.
2812 ** Adjust im->yimg to match the space requirements.
2814 if (leg_place(im, 0) == -1)
2817 if (im->watermark[0] != '\0') {
2818 im->yimg += Ywatermark;
2826 /* from http://www.cygnus-software.com/papers/comparingfloats/comparingfloats.htm */
2827 /* yes we are loosing precision by doing tos with floats instead of doubles
2828 but it seems more stable this way. */
2831 /* draw that picture thing ... */
2837 int lazy = lazy_check(im);
2839 double areazero = 0.0;
2840 PangoFontMap *font_map = pango_cairo_font_map_get_default();
2842 graph_desc_t *lastgdes = NULL;
2844 /* if we are lazy and there is nothing to PRINT ... quit now */
2845 if (lazy && im->prt_c == 0)
2848 /* pull the data from the rrd files ... */
2850 if (data_fetch(im) == -1)
2853 /* evaluate VDEF and CDEF operations ... */
2854 if (data_calc(im) == -1)
2858 /* calculate and PRINT and GPRINT definitions. We have to do it at
2859 * this point because it will affect the length of the legends
2860 * if there are no graph elements we stop here ...
2861 * if we are lazy, try to quit ...
2863 i = print_calc(im, calcpr);
2866 if ((i == 0) || lazy)
2869 /**************************************************************
2870 *** Calculating sizes and locations became a bit confusing ***
2871 *** so I moved this into a separate function. ***
2872 **************************************************************/
2873 if (graph_size_location(im, i) == -1)
2876 /* get actual drawing data and find min and max values */
2877 if (data_proc(im) == -1)
2880 if (!im->logarithmic) {
2883 /* identify si magnitude Kilo, Mega Giga ? */
2884 if (!im->rigid && !im->logarithmic)
2885 expand_range(im); /* make sure the upper and lower limit are
2888 if (!calc_horizontal_grid(im))
2894 /* the actual graph is created by going through the individual
2895 graph elements and then drawing them */
2896 cairo_surface_destroy(im->surface);
2898 switch (im->imgformat) {
2901 cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
2902 im->ximg * im->zoom,
2903 im->yimg * im->zoom);
2907 cairo_pdf_surface_create(im->graphfile, im->ximg * im->zoom,
2908 im->yimg * im->zoom);
2912 cairo_ps_surface_create(im->graphfile, im->ximg * im->zoom,
2913 im->yimg * im->zoom);
2917 cairo_svg_surface_create(im->graphfile, im->ximg * im->zoom,
2918 im->yimg * im->zoom);
2919 cairo_svg_surface_restrict_to_version(im->surface,
2920 CAIRO_SVG_VERSION_1_1);
2923 im->cr = cairo_create(im->surface);
2924 pango_cairo_font_map_set_resolution(font_map, 100);
2925 cairo_scale(im->cr, im->zoom, im->zoom);
2927 gfx_new_area(im->cr,
2929 0, im->yimg, im->ximg, im->yimg, im->graph_col[GRC_BACK]);
2931 gfx_add_point(im->cr, im->ximg, 0);
2932 gfx_close_path(im->cr);
2934 gfx_new_area(im->cr,
2935 im->xorigin, im->yorigin,
2936 im->xorigin + im->xsize, im->yorigin,
2937 im->xorigin + im->xsize, im->yorigin - im->ysize,
2938 im->graph_col[GRC_CANVAS]);
2940 gfx_add_point(im->cr, im->xorigin, im->yorigin - im->ysize);
2941 gfx_close_path(im->cr);
2943 if (im->minval > 0.0)
2944 areazero = im->minval;
2945 if (im->maxval < 0.0)
2946 areazero = im->maxval;
2948 for (i = 0; i < im->gdes_c; i++) {
2949 switch (im->gdes[i].gf) {
2962 for (ii = 0; ii < im->xsize; ii++) {
2963 if (!isnan(im->gdes[i].p_data[ii]) &&
2964 im->gdes[i].p_data[ii] != 0.0) {
2965 if (im->gdes[i].yrule > 0) {
2967 im->xorigin + ii, im->yorigin,
2970 im->gdes[i].yrule * im->ysize, 1.0,
2972 } else if (im->gdes[i].yrule < 0) {
2975 im->yorigin - im->ysize,
2978 im->gdes[i].yrule) *
2979 im->ysize, 1.0, im->gdes[i].col);
2987 /* fix data points at oo and -oo */
2988 for (ii = 0; ii < im->xsize; ii++) {
2989 if (isinf(im->gdes[i].p_data[ii])) {
2990 if (im->gdes[i].p_data[ii] > 0) {
2991 im->gdes[i].p_data[ii] = im->maxval;
2993 im->gdes[i].p_data[ii] = im->minval;
2999 /* *******************************************************
3004 -------|--t-1--t--------------------------------
3006 if we know the value at time t was a then
3007 we draw a square from t-1 to t with the value a.
3009 ********************************************************* */
3010 if (im->gdes[i].col.alpha != 0.0) {
3011 /* GF_LINE and friend */
3012 if (im->gdes[i].gf == GF_LINE) {
3013 double last_y = 0.0;
3017 cairo_new_path(im->cr);
3019 cairo_set_line_width(im->cr, im->gdes[i].linewidth);
3020 for (ii = 1; ii < im->xsize; ii++) {
3021 if (isnan(im->gdes[i].p_data[ii])
3022 || (im->slopemode == 1
3023 && isnan(im->gdes[i].p_data[ii - 1]))) {
3028 last_y = ytr(im, im->gdes[i].p_data[ii]);
3029 if (im->slopemode == 0) {
3030 double x = ii - 1 + im->xorigin;
3033 gfx_line_fit(im->cr, &x, &y);
3034 cairo_move_to(im->cr, x, y);
3035 x = ii + im->xorigin;
3037 gfx_line_fit(im->cr, &x, &y);
3038 cairo_line_to(im->cr, x, y);
3040 double x = ii - 1 + im->xorigin;
3042 im->gdes[i].p_data[ii - 1]);
3044 gfx_line_fit(im->cr, &x, &y);
3045 cairo_move_to(im->cr, x, y);
3046 x = ii + im->xorigin;
3048 gfx_line_fit(im->cr, &x, &y);
3049 cairo_line_to(im->cr, x, y);
3053 double x1 = ii + im->xorigin;
3054 double y1 = ytr(im, im->gdes[i].p_data[ii]);
3056 if (im->slopemode == 0
3057 && !AlmostEqual2sComplement(y1, last_y, 4)) {
3058 double x = ii - 1 + im->xorigin;
3061 gfx_line_fit(im->cr, &x, &y);
3062 cairo_line_to(im->cr, x, y);
3065 gfx_line_fit(im->cr, &x1, &y1);
3066 cairo_line_to(im->cr, x1, y1);
3070 cairo_set_source_rgba(im->cr, im->gdes[i].col.red,
3071 im->gdes[i].col.green,
3072 im->gdes[i].col.blue,
3073 im->gdes[i].col.alpha);
3074 cairo_set_line_cap(im->cr, CAIRO_LINE_CAP_ROUND);
3075 cairo_set_line_join(im->cr, CAIRO_LINE_JOIN_ROUND);
3076 cairo_stroke(im->cr);
3077 cairo_restore(im->cr);
3080 double *foreY = malloc(sizeof(double) * im->xsize * 2);
3081 double *foreX = malloc(sizeof(double) * im->xsize * 2);
3082 double *backY = malloc(sizeof(double) * im->xsize * 2);
3083 double *backX = malloc(sizeof(double) * im->xsize * 2);
3086 for (ii = 0; ii <= im->xsize; ii++) {
3089 if (idxI > 0 && (drawem != 0 || ii == im->xsize)) {
3094 && AlmostEqual2sComplement(foreY[lastI],
3096 && AlmostEqual2sComplement(foreY[lastI],
3101 gfx_new_area(im->cr,
3104 foreX[cntI], foreY[cntI],
3106 while (cntI < idxI) {
3111 AlmostEqual2sComplement(foreY[lastI],
3114 AlmostEqual2sComplement(foreY[lastI],
3119 gfx_add_point(im->cr, foreX[cntI],
3122 gfx_add_point(im->cr, backX[idxI], backY[idxI]);
3128 AlmostEqual2sComplement(backY[lastI],
3131 AlmostEqual2sComplement(backY[lastI],
3136 gfx_add_point(im->cr, backX[idxI],
3141 gfx_close_path(im->cr);
3147 if (ii == im->xsize)
3150 if (im->slopemode == 0 && ii == 0) {
3153 if (isnan(im->gdes[i].p_data[ii])) {
3157 ytop = ytr(im, im->gdes[i].p_data[ii]);
3158 if (lastgdes && im->gdes[i].stack) {
3159 ybase = ytr(im, lastgdes->p_data[ii]);
3161 ybase = ytr(im, areazero);
3163 if (ybase == ytop) {
3169 double extra = ytop;
3174 if (im->slopemode == 0) {
3175 backY[++idxI] = ybase - 0.2;
3176 backX[idxI] = ii + im->xorigin - 1;
3177 foreY[idxI] = ytop + 0.2;
3178 foreX[idxI] = ii + im->xorigin - 1;
3180 backY[++idxI] = ybase - 0.2;
3181 backX[idxI] = ii + im->xorigin;
3182 foreY[idxI] = ytop + 0.2;
3183 foreX[idxI] = ii + im->xorigin;
3185 /* close up any remaining area */
3190 } /* else GF_LINE */
3192 /* if color != 0x0 */
3193 /* make sure we do not run into trouble when stacking on NaN */
3194 for (ii = 0; ii < im->xsize; ii++) {
3195 if (isnan(im->gdes[i].p_data[ii])) {
3196 if (lastgdes && (im->gdes[i].stack)) {
3197 im->gdes[i].p_data[ii] = lastgdes->p_data[ii];
3199 im->gdes[i].p_data[ii] = areazero;
3203 lastgdes = &(im->gdes[i]);
3207 ("STACK should already be turned into LINE or AREA here");
3214 /* grid_paint also does the text */
3215 if (!(im->extra_flags & ONLY_GRAPH))
3219 if (!(im->extra_flags & ONLY_GRAPH))
3222 /* the RULES are the last thing to paint ... */
3223 for (i = 0; i < im->gdes_c; i++) {
3225 switch (im->gdes[i].gf) {
3227 if (im->gdes[i].yrule >= im->minval
3228 && im->gdes[i].yrule <= im->maxval)
3230 im->xorigin, ytr(im, im->gdes[i].yrule),
3231 im->xorigin + im->xsize, ytr(im,
3233 1.0, im->gdes[i].col);
3236 if (im->gdes[i].xrule >= im->start
3237 && im->gdes[i].xrule <= im->end)
3239 xtr(im, im->gdes[i].xrule), im->yorigin,
3240 xtr(im, im->gdes[i].xrule),
3241 im->yorigin - im->ysize, 1.0, im->gdes[i].col);
3249 switch (im->imgformat) {
3251 if (cairo_surface_write_to_png(im->surface, im->graphfile) !=
3252 CAIRO_STATUS_SUCCESS) {
3253 rrd_set_error("Could not save png to '%s'", im->graphfile);
3258 cairo_show_page(im->cr);
3265 /*****************************************************
3267 *****************************************************/
3274 if ((im->gdes = (graph_desc_t *) rrd_realloc(im->gdes, (im->gdes_c)
3275 * sizeof(graph_desc_t))) ==
3277 rrd_set_error("realloc graph_descs");
3282 im->gdes[im->gdes_c - 1].step = im->step;
3283 im->gdes[im->gdes_c - 1].step_orig = im->step;
3284 im->gdes[im->gdes_c - 1].stack = 0;
3285 im->gdes[im->gdes_c - 1].linewidth = 0;
3286 im->gdes[im->gdes_c - 1].debug = 0;
3287 im->gdes[im->gdes_c - 1].start = im->start;
3288 im->gdes[im->gdes_c - 1].start_orig = im->start;
3289 im->gdes[im->gdes_c - 1].end = im->end;
3290 im->gdes[im->gdes_c - 1].end_orig = im->end;
3291 im->gdes[im->gdes_c - 1].vname[0] = '\0';
3292 im->gdes[im->gdes_c - 1].data = NULL;
3293 im->gdes[im->gdes_c - 1].ds_namv = NULL;
3294 im->gdes[im->gdes_c - 1].data_first = 0;
3295 im->gdes[im->gdes_c - 1].p_data = NULL;
3296 im->gdes[im->gdes_c - 1].rpnp = NULL;
3297 im->gdes[im->gdes_c - 1].shift = 0.0;
3298 im->gdes[im->gdes_c - 1].col.red = 0.0;
3299 im->gdes[im->gdes_c - 1].col.green = 0.0;
3300 im->gdes[im->gdes_c - 1].col.blue = 0.0;
3301 im->gdes[im->gdes_c - 1].col.alpha = 0.0;
3302 im->gdes[im->gdes_c - 1].legend[0] = '\0';
3303 im->gdes[im->gdes_c - 1].format[0] = '\0';
3304 im->gdes[im->gdes_c - 1].strftm = 0;
3305 im->gdes[im->gdes_c - 1].rrd[0] = '\0';
3306 im->gdes[im->gdes_c - 1].ds = -1;
3307 im->gdes[im->gdes_c - 1].cf_reduce = CF_AVERAGE;
3308 im->gdes[im->gdes_c - 1].cf = CF_AVERAGE;
3309 im->gdes[im->gdes_c - 1].p_data = NULL;
3310 im->gdes[im->gdes_c - 1].yrule = DNAN;
3311 im->gdes[im->gdes_c - 1].xrule = 0;
3315 /* copies input untill the first unescaped colon is found
3316 or until input ends. backslashes have to be escaped as well */
3318 const char *const input,
3324 for (inp = 0; inp < len && input[inp] != ':' && input[inp] != '\0'; inp++) {
3325 if (input[inp] == '\\' &&
3326 input[inp + 1] != '\0' &&
3327 (input[inp + 1] == '\\' || input[inp + 1] == ':')) {
3328 output[outp++] = input[++inp];
3330 output[outp++] = input[inp];
3333 output[outp] = '\0';
3337 /* Some surgery done on this function, it became ridiculously big.
3339 ** - initializing now in rrd_graph_init()
3340 ** - options parsing now in rrd_graph_options()
3341 ** - script parsing now in rrd_graph_script()
3355 rrd_graph_init(&im);
3357 /* a dummy surface so that we can measure text sizes for placements */
3358 im.surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, 10, 10);
3359 im.cr = cairo_create(im.surface);
3362 /* not currently using this ... */
3363 im.graphhandle = stream;
3365 rrd_graph_options(argc, argv, &im);
3366 if (rrd_test_error()) {
3371 if (strlen(argv[optind]) >= MAXPATH) {
3372 rrd_set_error("filename (including path) too long");
3376 strncpy(im.graphfile, argv[optind], MAXPATH - 1);
3377 im.graphfile[MAXPATH - 1] = '\0';
3379 rrd_graph_script(argc, argv, &im, 1);
3380 if (rrd_test_error()) {
3385 /* Everything is now read and the actual work can start */
3388 if (graph_paint(&im, prdata) == -1) {
3393 /* The image is generated and needs to be output.
3394 ** Also, if needed, print a line with information about the image.
3405 /* maybe prdata is not allocated yet ... lets do it now */
3406 if ((*prdata = calloc(2, sizeof(char *))) == NULL) {
3407 rrd_set_error("malloc imginfo");
3412 malloc((strlen(im.imginfo) + 200 +
3413 strlen(im.graphfile)) * sizeof(char)))
3415 rrd_set_error("malloc imginfo");
3418 filename = im.graphfile + strlen(im.graphfile);
3419 while (filename > im.graphfile) {
3420 if (*(filename - 1) == '/' || *(filename - 1) == '\\')
3425 sprintf((*prdata)[0], im.imginfo, filename,
3426 (long) (im.zoom * im.ximg), (long) (im.zoom * im.yimg));
3432 void rrd_graph_init(
3440 #ifdef HAVE_SETLOCALE
3441 setlocale(LC_TIME, "");
3442 #ifdef HAVE_MBSTOWCS
3443 setlocale(LC_CTYPE, "");
3449 im->xlab_user.minsec = -1;
3455 im->ylegend[0] = '\0';
3456 im->title[0] = '\0';
3457 im->watermark[0] = '\0';
3460 im->unitsexponent = 9999;
3461 im->unitslength = 6;
3462 im->forceleftspace = 0;
3464 im->viewfactor = 1.0;
3465 im->imgformat = IF_PNG;
3468 im->extra_flags = 0;
3474 im->logarithmic = 0;
3475 im->ygridstep = DNAN;
3476 im->draw_x_grid = 1;
3477 im->draw_y_grid = 1;
3482 im->grid_dash_on = 1;
3483 im->grid_dash_off = 1;
3484 im->tabwidth = 40.0;
3487 for (i = 0; i < DIM(graph_col); i++)
3488 im->graph_col[i] = graph_col[i];
3490 #if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
3493 char rrd_win_default_font[1000];
3495 windir = getenv("windir");
3496 /* %windir% is something like D:\windows or C:\winnt */
3497 if (windir != NULL) {
3498 strncpy(rrd_win_default_font, windir, 500);
3499 rrd_win_default_font[500] = '\0';
3500 strcat(rrd_win_default_font, "\\fonts\\");
3501 strcat(rrd_win_default_font, RRD_DEFAULT_FONT);
3502 for (i = 0; i < DIM(text_prop); i++) {
3503 strncpy(text_prop[i].font, rrd_win_default_font,
3504 sizeof(text_prop[i].font) - 1);
3505 text_prop[i].font[sizeof(text_prop[i].font) - 1] = '\0';
3513 deffont = getenv("RRD_DEFAULT_FONT");
3514 if (deffont != NULL) {
3515 for (i = 0; i < DIM(text_prop); i++) {
3516 strncpy(text_prop[i].font, deffont,
3517 sizeof(text_prop[i].font) - 1);
3518 text_prop[i].font[sizeof(text_prop[i].font) - 1] = '\0';
3522 for (i = 0; i < DIM(text_prop); i++) {
3523 im->text_prop[i].size = text_prop[i].size;
3524 strcpy(im->text_prop[i].font, text_prop[i].font);
3528 void rrd_graph_options(
3534 char *parsetime_error = NULL;
3535 char scan_gtm[12], scan_mtm[12], scan_ltm[12], col_nam[12];
3536 time_t start_tmp = 0, end_tmp = 0;
3538 struct rrd_time_value start_tv, end_tv;
3539 long unsigned int color;
3542 opterr = 0; /* initialize getopt */
3544 parsetime("end-24h", &start_tv);
3545 parsetime("now", &end_tv);
3547 /* defines for long options without a short equivalent. should be bytes,
3548 and may not collide with (the ASCII value of) short options */
3549 #define LONGOPT_UNITS_SI 255
3552 static struct option long_options[] = {
3553 {"start", required_argument, 0, 's'},
3554 {"end", required_argument, 0, 'e'},
3555 {"x-grid", required_argument, 0, 'x'},
3556 {"y-grid", required_argument, 0, 'y'},
3557 {"vertical-label", required_argument, 0, 'v'},
3558 {"width", required_argument, 0, 'w'},
3559 {"height", required_argument, 0, 'h'},
3560 {"full-size-mode", no_argument, 0, 'D'},
3561 {"interlaced", no_argument, 0, 'i'},
3562 {"upper-limit", required_argument, 0, 'u'},
3563 {"lower-limit", required_argument, 0, 'l'},
3564 {"rigid", no_argument, 0, 'r'},
3565 {"base", required_argument, 0, 'b'},
3566 {"logarithmic", no_argument, 0, 'o'},
3567 {"color", required_argument, 0, 'c'},
3568 {"font", required_argument, 0, 'n'},
3569 {"title", required_argument, 0, 't'},
3570 {"imginfo", required_argument, 0, 'f'},
3571 {"imgformat", required_argument, 0, 'a'},
3572 {"lazy", no_argument, 0, 'z'},
3573 {"zoom", required_argument, 0, 'm'},
3574 {"no-legend", no_argument, 0, 'g'},
3575 {"force-rules-legend", no_argument, 0, 'F'},
3576 {"only-graph", no_argument, 0, 'j'},
3577 {"alt-y-grid", no_argument, 0, 'Y'},
3578 {"no-minor", no_argument, 0, 'I'},
3579 {"slope-mode", no_argument, 0, 'E'},
3580 {"alt-autoscale", no_argument, 0, 'A'},
3581 {"alt-autoscale-min", no_argument, 0, 'J'},
3582 {"alt-autoscale-max", no_argument, 0, 'M'},
3583 {"no-gridfit", no_argument, 0, 'N'},
3584 {"units-exponent", required_argument, 0, 'X'},
3585 {"units-length", required_argument, 0, 'L'},
3586 {"units", required_argument, 0, LONGOPT_UNITS_SI},
3587 {"step", required_argument, 0, 'S'},
3588 {"tabwidth", required_argument, 0, 'T'},
3589 {"font-render-mode", required_argument, 0, 'R'},
3590 {"font-smoothing-threshold", required_argument, 0, 'B'},
3591 {"watermark", required_argument, 0, 'W'},
3592 {"alt-y-mrtg", no_argument, 0, 1000}, /* this has no effect it is just here to save old apps from crashing when they use it */
3595 int option_index = 0;
3597 int col_start, col_end;
3599 opt = getopt_long(argc, argv,
3600 "s:e:x:y:v:w:h:D:iu:l:rb:oc:n:m:t:f:a:I:zgjFYAMEX:L:S:T:NR:B:W:",
3601 long_options, &option_index);
3608 im->extra_flags |= NOMINOR;
3611 im->extra_flags |= ALTYGRID;
3614 im->extra_flags |= ALTAUTOSCALE;
3617 im->extra_flags |= ALTAUTOSCALE_MIN;
3620 im->extra_flags |= ALTAUTOSCALE_MAX;
3623 im->extra_flags |= ONLY_GRAPH;
3626 im->extra_flags |= NOLEGEND;
3629 im->extra_flags |= FORCE_RULES_LEGEND;
3631 case LONGOPT_UNITS_SI:
3632 if (im->extra_flags & FORCE_UNITS) {
3633 rrd_set_error("--units can only be used once!");
3636 if (strcmp(optarg, "si") == 0)
3637 im->extra_flags |= FORCE_UNITS_SI;
3639 rrd_set_error("invalid argument for --units: %s", optarg);
3644 im->unitsexponent = atoi(optarg);
3647 im->unitslength = atoi(optarg);
3648 im->forceleftspace = 1;
3651 im->tabwidth = atof(optarg);
3654 im->step = atoi(optarg);
3660 if ((parsetime_error = parsetime(optarg, &start_tv))) {
3661 rrd_set_error("start time: %s", parsetime_error);
3666 if ((parsetime_error = parsetime(optarg, &end_tv))) {
3667 rrd_set_error("end time: %s", parsetime_error);
3672 if (strcmp(optarg, "none") == 0) {
3673 im->draw_x_grid = 0;
3678 "%10[A-Z]:%ld:%10[A-Z]:%ld:%10[A-Z]:%ld:%ld:%n",
3680 &im->xlab_user.gridst,
3682 &im->xlab_user.mgridst,
3684 &im->xlab_user.labst,
3685 &im->xlab_user.precis, &stroff) == 7 && stroff != 0) {
3686 strncpy(im->xlab_form, optarg + stroff,
3687 sizeof(im->xlab_form) - 1);
3688 im->xlab_form[sizeof(im->xlab_form) - 1] = '\0';
3689 if ((int) (im->xlab_user.gridtm = tmt_conv(scan_gtm)) == -1) {
3690 rrd_set_error("unknown keyword %s", scan_gtm);
3692 } else if ((int) (im->xlab_user.mgridtm = tmt_conv(scan_mtm))
3694 rrd_set_error("unknown keyword %s", scan_mtm);
3696 } else if ((int) (im->xlab_user.labtm = tmt_conv(scan_ltm)) ==
3698 rrd_set_error("unknown keyword %s", scan_ltm);
3701 im->xlab_user.minsec = 1;
3702 im->xlab_user.stst = im->xlab_form;
3704 rrd_set_error("invalid x-grid format");
3710 if (strcmp(optarg, "none") == 0) {
3711 im->draw_y_grid = 0;
3715 if (sscanf(optarg, "%lf:%d", &im->ygridstep, &im->ylabfact) == 2) {
3716 if (im->ygridstep <= 0) {
3717 rrd_set_error("grid step must be > 0");
3719 } else if (im->ylabfact < 1) {
3720 rrd_set_error("label factor must be > 0");
3724 rrd_set_error("invalid y-grid format");
3729 strncpy(im->ylegend, optarg, 150);
3730 im->ylegend[150] = '\0';
3733 im->maxval = atof(optarg);
3736 im->minval = atof(optarg);
3739 im->base = atol(optarg);
3740 if (im->base != 1024 && im->base != 1000) {
3742 ("the only sensible value for base apart from 1000 is 1024");
3747 long_tmp = atol(optarg);
3748 if (long_tmp < 10) {
3749 rrd_set_error("width below 10 pixels");
3752 im->xsize = long_tmp;
3755 long_tmp = atol(optarg);
3756 if (long_tmp < 10) {
3757 rrd_set_error("height below 10 pixels");
3760 im->ysize = long_tmp;
3763 im->extra_flags |= FULL_SIZE_MODE;
3766 /* interlaced png not supported at the moment */
3772 im->imginfo = optarg;
3775 if ((int) (im->imgformat = if_conv(optarg)) == -1) {
3776 rrd_set_error("unsupported graphics format '%s'", optarg);
3788 im->logarithmic = 1;
3792 "%10[A-Z]#%n%8lx%n",
3793 col_nam, &col_start, &color, &col_end) == 2) {
3795 int col_len = col_end - col_start;
3799 color = (((color & 0xF00) * 0x110000) |
3800 ((color & 0x0F0) * 0x011000) |
3801 ((color & 0x00F) * 0x001100) | 0x000000FF);
3804 color = (((color & 0xF000) * 0x11000) |
3805 ((color & 0x0F00) * 0x01100) |
3806 ((color & 0x00F0) * 0x00110) |
3807 ((color & 0x000F) * 0x00011)
3811 color = (color << 8) + 0xff /* shift left by 8 */ ;
3816 rrd_set_error("the color format is #RRGGBB[AA]");
3819 if ((ci = grc_conv(col_nam)) != -1) {
3820 im->graph_col[ci] = gfx_hex_to_col(color);
3822 rrd_set_error("invalid color name '%s'", col_nam);
3826 rrd_set_error("invalid color def format");
3833 char font[1024] = "";
3835 if (sscanf(optarg, "%10[A-Z]:%lf:%1000s", prop, &size, font) >= 2) {
3836 int sindex, propidx;
3838 if ((sindex = text_prop_conv(prop)) != -1) {
3839 for (propidx = sindex; propidx < TEXT_PROP_LAST;
3842 im->text_prop[propidx].size = size;
3844 if (strlen(font) > 0) {
3845 strcpy(im->text_prop[propidx].font, font);
3847 if (propidx == sindex && sindex != 0)
3851 rrd_set_error("invalid fonttag '%s'", prop);
3855 rrd_set_error("invalid text property format");
3861 im->zoom = atof(optarg);
3862 if (im->zoom <= 0.0) {
3863 rrd_set_error("zoom factor must be > 0");
3868 strncpy(im->title, optarg, 150);
3869 im->title[150] = '\0';
3873 /* not supported curently */
3877 /* not supported curently */
3881 strncpy(im->watermark, optarg, 100);
3882 im->watermark[99] = '\0';
3887 rrd_set_error("unknown option '%c'", optopt);
3889 rrd_set_error("unknown option '%s'", argv[optind - 1]);
3894 if (optind >= argc) {
3895 rrd_set_error("missing filename");
3899 if (im->logarithmic == 1 && im->minval <= 0) {
3901 ("for a logarithmic yaxis you must specify a lower-limit > 0");
3905 if (proc_start_end(&start_tv, &end_tv, &start_tmp, &end_tmp) == -1) {
3906 /* error string is set in parsetime.c */
3910 if (start_tmp < 3600 * 24 * 365 * 10) {
3911 rrd_set_error("the first entry to fetch should be after 1980 (%ld)",
3916 if (end_tmp < start_tmp) {
3917 rrd_set_error("start (%ld) should be less than end (%ld)",
3918 start_tmp, end_tmp);
3922 im->start = start_tmp;
3924 im->step = max((long) im->step, (im->end - im->start) / im->xsize);
3927 int rrd_graph_color(
3934 graph_desc_t *gdp = &im->gdes[im->gdes_c - 1];
3936 color = strstr(var, "#");
3937 if (color == NULL) {
3938 if (optional == 0) {
3939 rrd_set_error("Found no color in %s", err);
3946 long unsigned int col;
3948 rest = strstr(color, ":");
3956 sscanf(color, "#%6lx%n", &col, &n);
3957 col = (col << 8) + 0xff /* shift left by 8 */ ;
3959 rrd_set_error("Color problem in %s", err);
3962 sscanf(color, "#%8lx%n", &col, &n);
3966 rrd_set_error("Color problem in %s", err);
3968 if (rrd_test_error())
3970 gdp->col = gfx_hex_to_col(col);
3983 while (*ptr != '\0')
3984 if (*ptr++ == '%') {
3986 /* line cannot end with percent char */
3990 /* '%s', '%S' and '%%' are allowed */
3991 if (*ptr == 's' || *ptr == 'S' || *ptr == '%')
3994 /* %c is allowed (but use only with vdef!) */
3995 else if (*ptr == 'c') {
4000 /* or else '% 6.2lf' and such are allowed */
4002 /* optional padding character */
4003 if (*ptr == ' ' || *ptr == '+' || *ptr == '-')
4006 /* This should take care of 'm.n' with all three optional */
4007 while (*ptr >= '0' && *ptr <= '9')
4011 while (*ptr >= '0' && *ptr <= '9')
4014 /* Either 'le', 'lf' or 'lg' must follow here */
4017 if (*ptr == 'e' || *ptr == 'f' || *ptr == 'g')
4032 struct graph_desc_t *gdes;
4033 const char *const str;
4035 /* A VDEF currently is either "func" or "param,func"
4036 * so the parsing is rather simple. Change if needed.
4043 sscanf(str, "%le,%29[A-Z]%n", ¶m, func, &n);
4044 if (n == (int) strlen(str)) { /* matched */
4048 sscanf(str, "%29[A-Z]%n", func, &n);
4049 if (n == (int) strlen(str)) { /* matched */
4052 rrd_set_error("Unknown function string '%s' in VDEF '%s'", str,
4057 if (!strcmp("PERCENT", func))
4058 gdes->vf.op = VDEF_PERCENT;
4059 else if (!strcmp("MAXIMUM", func))
4060 gdes->vf.op = VDEF_MAXIMUM;
4061 else if (!strcmp("AVERAGE", func))
4062 gdes->vf.op = VDEF_AVERAGE;
4063 else if (!strcmp("MINIMUM", func))
4064 gdes->vf.op = VDEF_MINIMUM;
4065 else if (!strcmp("TOTAL", func))
4066 gdes->vf.op = VDEF_TOTAL;
4067 else if (!strcmp("FIRST", func))
4068 gdes->vf.op = VDEF_FIRST;
4069 else if (!strcmp("LAST", func))
4070 gdes->vf.op = VDEF_LAST;
4071 else if (!strcmp("LSLSLOPE", func))
4072 gdes->vf.op = VDEF_LSLSLOPE;
4073 else if (!strcmp("LSLINT", func))
4074 gdes->vf.op = VDEF_LSLINT;
4075 else if (!strcmp("LSLCORREL", func))
4076 gdes->vf.op = VDEF_LSLCORREL;
4078 rrd_set_error("Unknown function '%s' in VDEF '%s'\n", func,
4083 switch (gdes->vf.op) {
4085 if (isnan(param)) { /* no parameter given */
4086 rrd_set_error("Function '%s' needs parameter in VDEF '%s'\n",
4090 if (param >= 0.0 && param <= 100.0) {
4091 gdes->vf.param = param;
4092 gdes->vf.val = DNAN; /* undefined */
4093 gdes->vf.when = 0; /* undefined */
4095 rrd_set_error("Parameter '%f' out of range in VDEF '%s'\n", param,
4108 case VDEF_LSLCORREL:
4110 gdes->vf.param = DNAN;
4111 gdes->vf.val = DNAN;
4114 rrd_set_error("Function '%s' needs no parameter in VDEF '%s'\n",
4130 graph_desc_t *src, *dst;
4134 dst = &im->gdes[gdi];
4135 src = &im->gdes[dst->vidx];
4136 data = src->data + src->ds;
4137 steps = (src->end - src->start) / src->step;
4140 printf("DEBUG: start == %lu, end == %lu, %lu steps\n", src->start,
4144 switch (dst->vf.op) {
4150 if ((array = malloc(steps * sizeof(double))) == NULL) {
4151 rrd_set_error("malloc VDEV_PERCENT");
4154 for (step = 0; step < steps; step++) {
4155 array[step] = data[step * src->ds_cnt];
4157 qsort(array, step, sizeof(double), vdef_percent_compar);
4159 field = (steps - 1) * dst->vf.param / 100;
4160 dst->vf.val = array[field];
4161 dst->vf.when = 0; /* no time component */
4164 for (step = 0; step < steps; step++)
4165 printf("DEBUG: %3li:%10.2f %c\n", step, array[step],
4166 step == field ? '*' : ' ');
4172 while (step != steps && isnan(data[step * src->ds_cnt]))
4174 if (step == steps) {
4178 dst->vf.val = data[step * src->ds_cnt];
4179 dst->vf.when = src->start + (step + 1) * src->step;
4181 while (step != steps) {
4182 if (finite(data[step * src->ds_cnt])) {
4183 if (data[step * src->ds_cnt] > dst->vf.val) {
4184 dst->vf.val = data[step * src->ds_cnt];
4185 dst->vf.when = src->start + (step + 1) * src->step;
4196 for (step = 0; step < steps; step++) {
4197 if (finite(data[step * src->ds_cnt])) {
4198 sum += data[step * src->ds_cnt];
4203 if (dst->vf.op == VDEF_TOTAL) {
4204 dst->vf.val = sum * src->step;
4205 dst->vf.when = 0; /* no time component */
4207 dst->vf.val = sum / cnt;
4208 dst->vf.when = 0; /* no time component */
4218 while (step != steps && isnan(data[step * src->ds_cnt]))
4220 if (step == steps) {
4224 dst->vf.val = data[step * src->ds_cnt];
4225 dst->vf.when = src->start + (step + 1) * src->step;
4227 while (step != steps) {
4228 if (finite(data[step * src->ds_cnt])) {
4229 if (data[step * src->ds_cnt] < dst->vf.val) {
4230 dst->vf.val = data[step * src->ds_cnt];
4231 dst->vf.when = src->start + (step + 1) * src->step;
4238 /* The time value returned here is one step before the
4239 * actual time value. This is the start of the first
4243 while (step != steps && isnan(data[step * src->ds_cnt]))
4245 if (step == steps) { /* all entries were NaN */
4249 dst->vf.val = data[step * src->ds_cnt];
4250 dst->vf.when = src->start + step * src->step;
4254 /* The time value returned here is the
4255 * actual time value. This is the end of the last
4259 while (step >= 0 && isnan(data[step * src->ds_cnt]))
4261 if (step < 0) { /* all entries were NaN */
4265 dst->vf.val = data[step * src->ds_cnt];
4266 dst->vf.when = src->start + (step + 1) * src->step;
4271 case VDEF_LSLCORREL:{
4272 /* Bestfit line by linear least squares method */
4275 double SUMx, SUMy, SUMxy, SUMxx, SUMyy, slope, y_intercept, correl;
4283 for (step = 0; step < steps; step++) {
4284 if (finite(data[step * src->ds_cnt])) {
4287 SUMxx += step * step;
4288 SUMxy += step * data[step * src->ds_cnt];
4289 SUMy += data[step * src->ds_cnt];
4290 SUMyy += data[step * src->ds_cnt] * data[step * src->ds_cnt];
4294 slope = (SUMx * SUMy - cnt * SUMxy) / (SUMx * SUMx - cnt * SUMxx);
4295 y_intercept = (SUMy - slope * SUMx) / cnt;
4298 (SUMx * SUMy) / cnt) / sqrt((SUMxx -
4299 (SUMx * SUMx) / cnt) * (SUMyy -
4305 if (dst->vf.op == VDEF_LSLSLOPE) {
4306 dst->vf.val = slope;
4308 } else if (dst->vf.op == VDEF_LSLINT) {
4309 dst->vf.val = y_intercept;
4311 } else if (dst->vf.op == VDEF_LSLCORREL) {
4312 dst->vf.val = correl;
4326 /* NaN < -INF < finite_values < INF */
4327 int vdef_percent_compar(
4332 /* Equality is not returned; this doesn't hurt except
4333 * (maybe) for a little performance.
4336 /* First catch NaN values. They are smallest */
4337 if (isnan(*(double *) a))
4339 if (isnan(*(double *) b))
4342 /* NaN doesn't reach this part so INF and -INF are extremes.
4343 * The sign from isinf() is compatible with the sign we return
4345 if (isinf(*(double *) a))
4346 return isinf(*(double *) a);
4347 if (isinf(*(double *) b))
4348 return isinf(*(double *) b);
4350 /* If we reach this, both values must be finite */
4351 if (*(double *) a < *(double *) b)