1 /****************************************************************************
2 * RRDtool 1.3rc5 Copyright by Tobi Oetiker, 1997-2008
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 "DejaVu Sans Mono,Bitstream Vera Sans Mono,monospace,Courier"
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, 6, 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));
209 /* conversion function for symbolic entry names */
212 #define conv_if(VV,VVV) \
213 if (strcmp(#VV, string) == 0) return VVV ;
219 conv_if(PRINT, GF_PRINT);
220 conv_if(GPRINT, GF_GPRINT);
221 conv_if(COMMENT, GF_COMMENT);
222 conv_if(HRULE, GF_HRULE);
223 conv_if(VRULE, GF_VRULE);
224 conv_if(LINE, GF_LINE);
225 conv_if(AREA, GF_AREA);
226 conv_if(STACK, GF_STACK);
227 conv_if(TICK, GF_TICK);
228 conv_if(TEXTALIGN, GF_TEXTALIGN);
229 conv_if(DEF, GF_DEF);
230 conv_if(CDEF, GF_CDEF);
231 conv_if(VDEF, GF_VDEF);
232 conv_if(XPORT, GF_XPORT);
233 conv_if(SHIFT, GF_SHIFT);
238 enum gfx_if_en if_conv(
242 conv_if(PNG, IF_PNG);
243 conv_if(SVG, IF_SVG);
244 conv_if(EPS, IF_EPS);
245 conv_if(PDF, IF_PDF);
250 enum tmt_en tmt_conv(
254 conv_if(SECOND, TMT_SECOND);
255 conv_if(MINUTE, TMT_MINUTE);
256 conv_if(HOUR, TMT_HOUR);
257 conv_if(DAY, TMT_DAY);
258 conv_if(WEEK, TMT_WEEK);
259 conv_if(MONTH, TMT_MONTH);
260 conv_if(YEAR, TMT_YEAR);
264 enum grc_en grc_conv(
268 conv_if(BACK, GRC_BACK);
269 conv_if(CANVAS, GRC_CANVAS);
270 conv_if(SHADEA, GRC_SHADEA);
271 conv_if(SHADEB, GRC_SHADEB);
272 conv_if(GRID, GRC_GRID);
273 conv_if(MGRID, GRC_MGRID);
274 conv_if(FONT, GRC_FONT);
275 conv_if(ARROW, GRC_ARROW);
276 conv_if(AXIS, GRC_AXIS);
277 conv_if(FRAME, GRC_FRAME);
282 enum text_prop_en text_prop_conv(
286 conv_if(DEFAULT, TEXT_PROP_DEFAULT);
287 conv_if(TITLE, TEXT_PROP_TITLE);
288 conv_if(AXIS, TEXT_PROP_AXIS);
289 conv_if(UNIT, TEXT_PROP_UNIT);
290 conv_if(LEGEND, TEXT_PROP_LEGEND);
301 cairo_status_t status = 0;
305 for (i = 0; i < (unsigned) im->gdes_c; i++) {
306 if (im->gdes[i].data_first) {
307 /* careful here, because a single pointer can occur several times */
308 free(im->gdes[i].data);
309 if (im->gdes[i].ds_namv) {
310 for (ii = 0; ii < im->gdes[i].ds_cnt; ii++)
311 free(im->gdes[i].ds_namv[ii]);
312 free(im->gdes[i].ds_namv);
315 /* free allocated memory used for dashed lines */
316 if (im->gdes[i].p_dashes != NULL)
317 free(im->gdes[i].p_dashes);
319 free(im->gdes[i].p_data);
320 free(im->gdes[i].rpnp);
323 if (im->font_options)
324 cairo_font_options_destroy(im->font_options);
327 status = cairo_status(im->cr);
328 cairo_destroy(im->cr);
330 if (im->rendered_image) {
331 free(im->rendered_image);
334 cairo_surface_destroy(im->surface);
336 fprintf(stderr, "OOPS: Cairo has issues it can't even die: %s\n",
337 cairo_status_to_string(status));
342 /* find SI magnitude symbol for the given number*/
344 image_desc_t *im, /* image description */
350 char *symbol[] = { "a", /* 10e-18 Atto */
351 "f", /* 10e-15 Femto */
352 "p", /* 10e-12 Pico */
353 "n", /* 10e-9 Nano */
354 "u", /* 10e-6 Micro */
355 "m", /* 10e-3 Milli */
360 "T", /* 10e12 Tera */
361 "P", /* 10e15 Peta */
368 if (*value == 0.0 || isnan(*value)) {
372 sindex = floor(log(fabs(*value)) / log((double) im->base));
373 *magfact = pow((double) im->base, (double) sindex);
374 (*value) /= (*magfact);
376 if (sindex <= symbcenter && sindex >= -symbcenter) {
377 (*symb_ptr) = symbol[sindex + symbcenter];
384 static char si_symbol[] = {
385 'a', /* 10e-18 Atto */
386 'f', /* 10e-15 Femto */
387 'p', /* 10e-12 Pico */
388 'n', /* 10e-9 Nano */
389 'u', /* 10e-6 Micro */
390 'm', /* 10e-3 Milli */
395 'T', /* 10e12 Tera */
396 'P', /* 10e15 Peta */
399 static const int si_symbcenter = 6;
401 /* find SI magnitude symbol for the numbers on the y-axis*/
403 image_desc_t *im /* image description */
407 double digits, viewdigits = 0;
410 floor(log(max(fabs(im->minval), fabs(im->maxval))) /
411 log((double) im->base));
413 if (im->unitsexponent != 9999) {
414 /* unitsexponent = 9, 6, 3, 0, -3, -6, -9, etc */
415 viewdigits = floor(im->unitsexponent / 3);
420 im->magfact = pow((double) im->base, digits);
423 printf("digits %6.3f im->magfact %6.3f\n", digits, im->magfact);
426 im->viewfactor = im->magfact / pow((double) im->base, viewdigits);
428 if (((viewdigits + si_symbcenter) < sizeof(si_symbol)) &&
429 ((viewdigits + si_symbcenter) >= 0))
430 im->symbol = si_symbol[(int) viewdigits + si_symbcenter];
435 /* move min and max values around to become sensible */
440 double sensiblevalues[] = { 1000.0, 900.0, 800.0, 750.0, 700.0,
441 600.0, 500.0, 400.0, 300.0, 250.0,
442 200.0, 125.0, 100.0, 90.0, 80.0,
443 75.0, 70.0, 60.0, 50.0, 40.0, 30.0,
444 25.0, 20.0, 10.0, 9.0, 8.0,
445 7.0, 6.0, 5.0, 4.0, 3.5, 3.0,
446 2.5, 2.0, 1.8, 1.5, 1.2, 1.0,
447 0.8, 0.7, 0.6, 0.5, 0.4, 0.3, 0.2, 0.1, 0.0, -1
450 double scaled_min, scaled_max;
457 printf("Min: %6.2f Max: %6.2f MagFactor: %6.2f\n",
458 im->minval, im->maxval, im->magfact);
461 if (isnan(im->ygridstep)) {
462 if (im->extra_flags & ALTAUTOSCALE) {
463 /* measure the amplitude of the function. Make sure that
464 graph boundaries are slightly higher then max/min vals
465 so we can see amplitude on the graph */
468 delt = im->maxval - im->minval;
470 fact = 2.0 * pow(10.0,
472 (max(fabs(im->minval), fabs(im->maxval)) /
475 adj = (fact - delt) * 0.55;
478 ("Min: %6.2f Max: %6.2f delt: %6.2f fact: %6.2f adj: %6.2f\n",
479 im->minval, im->maxval, delt, fact, adj);
484 } else if (im->extra_flags & ALTAUTOSCALE_MIN) {
485 /* measure the amplitude of the function. Make sure that
486 graph boundaries are slightly lower than min vals
487 so we can see amplitude on the graph */
488 adj = (im->maxval - im->minval) * 0.1;
490 } else if (im->extra_flags & ALTAUTOSCALE_MAX) {
491 /* measure the amplitude of the function. Make sure that
492 graph boundaries are slightly higher than max vals
493 so we can see amplitude on the graph */
494 adj = (im->maxval - im->minval) * 0.1;
497 scaled_min = im->minval / im->magfact;
498 scaled_max = im->maxval / im->magfact;
500 for (i = 1; sensiblevalues[i] > 0; i++) {
501 if (sensiblevalues[i - 1] >= scaled_min &&
502 sensiblevalues[i] <= scaled_min)
503 im->minval = sensiblevalues[i] * (im->magfact);
505 if (-sensiblevalues[i - 1] <= scaled_min &&
506 -sensiblevalues[i] >= scaled_min)
507 im->minval = -sensiblevalues[i - 1] * (im->magfact);
509 if (sensiblevalues[i - 1] >= scaled_max &&
510 sensiblevalues[i] <= scaled_max)
511 im->maxval = sensiblevalues[i - 1] * (im->magfact);
513 if (-sensiblevalues[i - 1] <= scaled_max &&
514 -sensiblevalues[i] >= scaled_max)
515 im->maxval = -sensiblevalues[i] * (im->magfact);
519 /* adjust min and max to the grid definition if there is one */
520 im->minval = (double) im->ylabfact * im->ygridstep *
521 floor(im->minval / ((double) im->ylabfact * im->ygridstep));
522 im->maxval = (double) im->ylabfact * im->ygridstep *
523 ceil(im->maxval / ((double) im->ylabfact * im->ygridstep));
527 fprintf(stderr, "SCALED Min: %6.2f Max: %6.2f Factor: %6.2f\n",
528 im->minval, im->maxval, im->magfact);
536 if (isnan(im->minval) || isnan(im->maxval))
539 if (im->logarithmic) {
540 double ya, yb, ypix, ypixfrac;
541 double log10_range = log10(im->maxval) - log10(im->minval);
543 ya = pow((double) 10, floor(log10(im->minval)));
544 while (ya < im->minval)
547 return; /* don't have y=10^x gridline */
549 if (yb <= im->maxval) {
550 /* we have at least 2 y=10^x gridlines.
551 Make sure distance between them in pixels
552 are an integer by expanding im->maxval */
553 double y_pixel_delta = ytr(im, ya) - ytr(im, yb);
554 double factor = y_pixel_delta / floor(y_pixel_delta);
555 double new_log10_range = factor * log10_range;
556 double new_ymax_log10 = log10(im->minval) + new_log10_range;
558 im->maxval = pow(10, new_ymax_log10);
559 ytr(im, DNAN); /* reset precalc */
560 log10_range = log10(im->maxval) - log10(im->minval);
562 /* make sure first y=10^x gridline is located on
563 integer pixel position by moving scale slightly
564 downwards (sub-pixel movement) */
565 ypix = ytr(im, ya) + im->ysize; /* add im->ysize so it always is positive */
566 ypixfrac = ypix - floor(ypix);
567 if (ypixfrac > 0 && ypixfrac < 1) {
568 double yfrac = ypixfrac / im->ysize;
570 im->minval = pow(10, log10(im->minval) - yfrac * log10_range);
571 im->maxval = pow(10, log10(im->maxval) - yfrac * log10_range);
572 ytr(im, DNAN); /* reset precalc */
575 /* Make sure we have an integer pixel distance between
576 each minor gridline */
577 double ypos1 = ytr(im, im->minval);
578 double ypos2 = ytr(im, im->minval + im->ygrid_scale.gridstep);
579 double y_pixel_delta = ypos1 - ypos2;
580 double factor = y_pixel_delta / floor(y_pixel_delta);
581 double new_range = factor * (im->maxval - im->minval);
582 double gridstep = im->ygrid_scale.gridstep;
583 double minor_y, minor_y_px, minor_y_px_frac;
585 if (im->maxval > 0.0)
586 im->maxval = im->minval + new_range;
588 im->minval = im->maxval - new_range;
589 ytr(im, DNAN); /* reset precalc */
590 /* make sure first minor gridline is on integer pixel y coord */
591 minor_y = gridstep * floor(im->minval / gridstep);
592 while (minor_y < im->minval)
594 minor_y_px = ytr(im, minor_y) + im->ysize; /* ensure > 0 by adding ysize */
595 minor_y_px_frac = minor_y_px - floor(minor_y_px);
596 if (minor_y_px_frac > 0 && minor_y_px_frac < 1) {
597 double yfrac = minor_y_px_frac / im->ysize;
598 double range = im->maxval - im->minval;
600 im->minval = im->minval - yfrac * range;
601 im->maxval = im->maxval - yfrac * range;
602 ytr(im, DNAN); /* reset precalc */
604 calc_horizontal_grid(im); /* recalc with changed im->maxval */
608 /* reduce data reimplementation by Alex */
611 enum cf_en cf, /* which consolidation function ? */
612 unsigned long cur_step, /* step the data currently is in */
613 time_t *start, /* start, end and step as requested ... */
614 time_t *end, /* ... by the application will be ... */
615 unsigned long *step, /* ... adjusted to represent reality */
616 unsigned long *ds_cnt, /* number of data sources in file */
618 { /* two dimensional array containing the data */
619 int i, reduce_factor = ceil((double) (*step) / (double) cur_step);
620 unsigned long col, dst_row, row_cnt, start_offset, end_offset, skiprows =
622 rrd_value_t *srcptr, *dstptr;
624 (*step) = cur_step * reduce_factor; /* set new step size for reduced data */
627 row_cnt = ((*end) - (*start)) / cur_step;
633 printf("Reducing %lu rows with factor %i time %lu to %lu, step %lu\n",
634 row_cnt, reduce_factor, *start, *end, cur_step);
635 for (col = 0; col < row_cnt; col++) {
636 printf("time %10lu: ", *start + (col + 1) * cur_step);
637 for (i = 0; i < *ds_cnt; i++)
638 printf(" %8.2e", srcptr[*ds_cnt * col + i]);
643 /* We have to combine [reduce_factor] rows of the source
644 ** into one row for the destination. Doing this we also
645 ** need to take care to combine the correct rows. First
646 ** alter the start and end time so that they are multiples
647 ** of the new step time. We cannot reduce the amount of
648 ** time so we have to move the end towards the future and
649 ** the start towards the past.
651 end_offset = (*end) % (*step);
652 start_offset = (*start) % (*step);
654 /* If there is a start offset (which cannot be more than
655 ** one destination row), skip the appropriate number of
656 ** source rows and one destination row. The appropriate
657 ** number is what we do know (start_offset/cur_step) of
658 ** the new interval (*step/cur_step aka reduce_factor).
661 printf("start_offset: %lu end_offset: %lu\n", start_offset, end_offset);
662 printf("row_cnt before: %lu\n", row_cnt);
665 (*start) = (*start) - start_offset;
666 skiprows = reduce_factor - start_offset / cur_step;
667 srcptr += skiprows * *ds_cnt;
668 for (col = 0; col < (*ds_cnt); col++)
673 printf("row_cnt between: %lu\n", row_cnt);
676 /* At the end we have some rows that are not going to be
677 ** used, the amount is end_offset/cur_step
680 (*end) = (*end) - end_offset + (*step);
681 skiprows = end_offset / cur_step;
685 printf("row_cnt after: %lu\n", row_cnt);
688 /* Sanity check: row_cnt should be multiple of reduce_factor */
689 /* if this gets triggered, something is REALLY WRONG ... we die immediately */
691 if (row_cnt % reduce_factor) {
692 printf("SANITY CHECK: %lu rows cannot be reduced by %i \n",
693 row_cnt, reduce_factor);
694 printf("BUG in reduce_data()\n");
698 /* Now combine reduce_factor intervals at a time
699 ** into one interval for the destination.
702 for (dst_row = 0; (long int) row_cnt >= reduce_factor; dst_row++) {
703 for (col = 0; col < (*ds_cnt); col++) {
704 rrd_value_t newval = DNAN;
705 unsigned long validval = 0;
707 for (i = 0; i < reduce_factor; i++) {
708 if (isnan(srcptr[i * (*ds_cnt) + col])) {
713 newval = srcptr[i * (*ds_cnt) + col];
722 newval += srcptr[i * (*ds_cnt) + col];
725 newval = min(newval, srcptr[i * (*ds_cnt) + col]);
728 /* an interval contains a failure if any subintervals contained a failure */
730 newval = max(newval, srcptr[i * (*ds_cnt) + col]);
733 newval = srcptr[i * (*ds_cnt) + col];
759 srcptr += (*ds_cnt) * reduce_factor;
760 row_cnt -= reduce_factor;
762 /* If we had to alter the endtime, we didn't have enough
763 ** source rows to fill the last row. Fill it with NaN.
766 for (col = 0; col < (*ds_cnt); col++)
769 row_cnt = ((*end) - (*start)) / *step;
771 printf("Done reducing. Currently %lu rows, time %lu to %lu, step %lu\n",
772 row_cnt, *start, *end, *step);
773 for (col = 0; col < row_cnt; col++) {
774 printf("time %10lu: ", *start + (col + 1) * (*step));
775 for (i = 0; i < *ds_cnt; i++)
776 printf(" %8.2e", srcptr[*ds_cnt * col + i]);
783 /* get the data required for the graphs from the
792 /* pull the data from the rrd files ... */
793 for (i = 0; i < (int) im->gdes_c; i++) {
794 /* only GF_DEF elements fetch data */
795 if (im->gdes[i].gf != GF_DEF)
799 /* do we have it already ? */
800 for (ii = 0; ii < i; ii++) {
801 if (im->gdes[ii].gf != GF_DEF)
803 if ((strcmp(im->gdes[i].rrd, im->gdes[ii].rrd) == 0)
804 && (im->gdes[i].cf == im->gdes[ii].cf)
805 && (im->gdes[i].cf_reduce == im->gdes[ii].cf_reduce)
806 && (im->gdes[i].start_orig == im->gdes[ii].start_orig)
807 && (im->gdes[i].end_orig == im->gdes[ii].end_orig)
808 && (im->gdes[i].step_orig == im->gdes[ii].step_orig)) {
809 /* OK, the data is already there.
810 ** Just copy the header portion
812 im->gdes[i].start = im->gdes[ii].start;
813 im->gdes[i].end = im->gdes[ii].end;
814 im->gdes[i].step = im->gdes[ii].step;
815 im->gdes[i].ds_cnt = im->gdes[ii].ds_cnt;
816 im->gdes[i].ds_namv = im->gdes[ii].ds_namv;
817 im->gdes[i].data = im->gdes[ii].data;
818 im->gdes[i].data_first = 0;
825 unsigned long ft_step = im->gdes[i].step; /* ft_step will record what we got from fetch */
827 if ((rrd_fetch_fn(im->gdes[i].rrd,
833 &im->gdes[i].ds_namv,
834 &im->gdes[i].data)) == -1) {
837 im->gdes[i].data_first = 1;
839 if (ft_step < im->gdes[i].step) {
840 reduce_data(im->gdes[i].cf_reduce,
845 &im->gdes[i].ds_cnt, &im->gdes[i].data);
847 im->gdes[i].step = ft_step;
851 /* lets see if the required data source is really there */
852 for (ii = 0; ii < (int) im->gdes[i].ds_cnt; ii++) {
853 if (strcmp(im->gdes[i].ds_namv[ii], im->gdes[i].ds_nam) == 0) {
857 if (im->gdes[i].ds == -1) {
858 rrd_set_error("No DS called '%s' in '%s'",
859 im->gdes[i].ds_nam, im->gdes[i].rrd);
867 /* evaluate the expressions in the CDEF functions */
869 /*************************************************************
871 *************************************************************/
873 long find_var_wrapper(
877 return find_var((image_desc_t *) arg1, key);
880 /* find gdes containing var*/
887 for (ii = 0; ii < im->gdes_c - 1; ii++) {
888 if ((im->gdes[ii].gf == GF_DEF
889 || im->gdes[ii].gf == GF_VDEF || im->gdes[ii].gf == GF_CDEF)
890 && (strcmp(im->gdes[ii].vname, key) == 0)) {
897 /* find the largest common denominator for all the numbers
898 in the 0 terminated num array */
905 for (i = 0; num[i + 1] != 0; i++) {
907 rest = num[i] % num[i + 1];
913 /* return i==0?num[i]:num[i-1]; */
917 /* run the rpn calculator on all the VDEF and CDEF arguments */
924 long *steparray, rpi;
929 rpnstack_init(&rpnstack);
931 for (gdi = 0; gdi < im->gdes_c; gdi++) {
932 /* Look for GF_VDEF and GF_CDEF in the same loop,
933 * so CDEFs can use VDEFs and vice versa
935 switch (im->gdes[gdi].gf) {
939 graph_desc_t *vdp = &im->gdes[im->gdes[gdi].vidx];
941 /* remove current shift */
942 vdp->start -= vdp->shift;
943 vdp->end -= vdp->shift;
946 if (im->gdes[gdi].shidx >= 0)
947 vdp->shift = im->gdes[im->gdes[gdi].shidx].vf.val;
950 vdp->shift = im->gdes[gdi].shval;
952 /* normalize shift to multiple of consolidated step */
953 vdp->shift = (vdp->shift / (long) vdp->step) * (long) vdp->step;
956 vdp->start += vdp->shift;
957 vdp->end += vdp->shift;
961 /* A VDEF has no DS. This also signals other parts
962 * of rrdtool that this is a VDEF value, not a CDEF.
964 im->gdes[gdi].ds_cnt = 0;
965 if (vdef_calc(im, gdi)) {
966 rrd_set_error("Error processing VDEF '%s'",
967 im->gdes[gdi].vname);
968 rpnstack_free(&rpnstack);
973 im->gdes[gdi].ds_cnt = 1;
974 im->gdes[gdi].ds = 0;
975 im->gdes[gdi].data_first = 1;
976 im->gdes[gdi].start = 0;
977 im->gdes[gdi].end = 0;
982 /* Find the variables in the expression.
983 * - VDEF variables are substituted by their values
984 * and the opcode is changed into OP_NUMBER.
985 * - CDEF variables are analized for their step size,
986 * the lowest common denominator of all the step
987 * sizes of the data sources involved is calculated
988 * and the resulting number is the step size for the
989 * resulting data source.
991 for (rpi = 0; im->gdes[gdi].rpnp[rpi].op != OP_END; rpi++) {
992 if (im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
993 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER) {
994 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
996 if (im->gdes[ptr].ds_cnt == 0) { /* this is a VDEF data source */
999 ("DEBUG: inside CDEF '%s' processing VDEF '%s'\n",
1000 im->gdes[gdi].vname, im->gdes[ptr].vname);
1001 printf("DEBUG: value from vdef is %f\n",
1002 im->gdes[ptr].vf.val);
1004 im->gdes[gdi].rpnp[rpi].val = im->gdes[ptr].vf.val;
1005 im->gdes[gdi].rpnp[rpi].op = OP_NUMBER;
1006 } else { /* normal variables and PREF(variables) */
1008 /* add one entry to the array that keeps track of the step sizes of the
1009 * data sources going into the CDEF. */
1011 rrd_realloc(steparray,
1013 1) * sizeof(*steparray))) == NULL) {
1014 rrd_set_error("realloc steparray");
1015 rpnstack_free(&rpnstack);
1019 steparray[stepcnt - 1] = im->gdes[ptr].step;
1021 /* adjust start and end of cdef (gdi) so
1022 * that it runs from the latest start point
1023 * to the earliest endpoint of any of the
1024 * rras involved (ptr)
1027 if (im->gdes[gdi].start < im->gdes[ptr].start)
1028 im->gdes[gdi].start = im->gdes[ptr].start;
1030 if (im->gdes[gdi].end == 0 ||
1031 im->gdes[gdi].end > im->gdes[ptr].end)
1032 im->gdes[gdi].end = im->gdes[ptr].end;
1034 /* store pointer to the first element of
1035 * the rra providing data for variable,
1036 * further save step size and data source
1039 im->gdes[gdi].rpnp[rpi].data =
1040 im->gdes[ptr].data + im->gdes[ptr].ds;
1041 im->gdes[gdi].rpnp[rpi].step = im->gdes[ptr].step;
1042 im->gdes[gdi].rpnp[rpi].ds_cnt = im->gdes[ptr].ds_cnt;
1044 /* backoff the *.data ptr; this is done so
1045 * rpncalc() function doesn't have to treat
1046 * the first case differently
1048 } /* if ds_cnt != 0 */
1049 } /* if OP_VARIABLE */
1050 } /* loop through all rpi */
1052 /* move the data pointers to the correct period */
1053 for (rpi = 0; im->gdes[gdi].rpnp[rpi].op != OP_END; rpi++) {
1054 if (im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
1055 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER) {
1056 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
1058 im->gdes[gdi].start - im->gdes[ptr].start;
1061 im->gdes[gdi].rpnp[rpi].data +=
1062 (diff / im->gdes[ptr].step) *
1063 im->gdes[ptr].ds_cnt;
1067 if (steparray == NULL) {
1068 rrd_set_error("rpn expressions without DEF"
1069 " or CDEF variables are not supported");
1070 rpnstack_free(&rpnstack);
1073 steparray[stepcnt] = 0;
1074 /* Now find the resulting step. All steps in all
1075 * used RRAs have to be visited
1077 im->gdes[gdi].step = lcd(steparray);
1079 if ((im->gdes[gdi].data = malloc(((im->gdes[gdi].end -
1080 im->gdes[gdi].start)
1081 / im->gdes[gdi].step)
1082 * sizeof(double))) == NULL) {
1083 rrd_set_error("malloc im->gdes[gdi].data");
1084 rpnstack_free(&rpnstack);
1088 /* Step through the new cdef results array and
1089 * calculate the values
1091 for (now = im->gdes[gdi].start + im->gdes[gdi].step;
1092 now <= im->gdes[gdi].end; now += im->gdes[gdi].step) {
1093 rpnp_t *rpnp = im->gdes[gdi].rpnp;
1095 /* 3rd arg of rpn_calc is for OP_VARIABLE lookups;
1096 * in this case we are advancing by timesteps;
1097 * we use the fact that time_t is a synonym for long
1099 if (rpn_calc(rpnp, &rpnstack, (long) now,
1100 im->gdes[gdi].data, ++dataidx) == -1) {
1101 /* rpn_calc sets the error string */
1102 rpnstack_free(&rpnstack);
1105 } /* enumerate over time steps within a CDEF */
1110 } /* enumerate over CDEFs */
1111 rpnstack_free(&rpnstack);
1115 /* from http://www.cygnus-software.com/papers/comparingfloats/comparingfloats.htm */
1116 /* yes we are loosing precision by doing tos with floats instead of doubles
1117 but it seems more stable this way. */
1119 static int AlmostEqual2sComplement(
1125 int aInt = *(int *) &A;
1126 int bInt = *(int *) &B;
1129 /* Make sure maxUlps is non-negative and small enough that the
1130 default NAN won't compare as equal to anything. */
1132 /* assert(maxUlps > 0 && maxUlps < 4 * 1024 * 1024); */
1134 /* Make aInt lexicographically ordered as a twos-complement int */
1137 aInt = 0x80000000l - aInt;
1139 /* Make bInt lexicographically ordered as a twos-complement int */
1142 bInt = 0x80000000l - bInt;
1144 intDiff = abs(aInt - bInt);
1146 if (intDiff <= maxUlps)
1152 /* massage data so, that we get one value for each x coordinate in the graph */
1157 double pixstep = (double) (im->end - im->start)
1158 / (double) im->xsize; /* how much time
1159 passes in one pixel */
1161 double minval = DNAN, maxval = DNAN;
1163 unsigned long gr_time;
1165 /* memory for the processed data */
1166 for (i = 0; i < im->gdes_c; i++) {
1167 if ((im->gdes[i].gf == GF_LINE) ||
1168 (im->gdes[i].gf == GF_AREA) || (im->gdes[i].gf == GF_TICK)) {
1169 if ((im->gdes[i].p_data = malloc((im->xsize + 1)
1170 * sizeof(rrd_value_t))) == NULL) {
1171 rrd_set_error("malloc data_proc");
1177 for (i = 0; i < im->xsize; i++) { /* for each pixel */
1180 gr_time = im->start + pixstep * i; /* time of the current step */
1183 for (ii = 0; ii < im->gdes_c; ii++) {
1186 switch (im->gdes[ii].gf) {
1190 if (!im->gdes[ii].stack)
1192 value = im->gdes[ii].yrule;
1193 if (isnan(value) || (im->gdes[ii].gf == GF_TICK)) {
1194 /* The time of the data doesn't necessarily match
1195 ** the time of the graph. Beware.
1197 vidx = im->gdes[ii].vidx;
1198 if (im->gdes[vidx].gf == GF_VDEF) {
1199 value = im->gdes[vidx].vf.val;
1201 if (((long int) gr_time >=
1202 (long int) im->gdes[vidx].start)
1203 && ((long int) gr_time <=
1204 (long int) im->gdes[vidx].end)) {
1205 value = im->gdes[vidx].data[(unsigned long)
1211 im->gdes[vidx].step)
1212 * im->gdes[vidx].ds_cnt +
1219 if (!isnan(value)) {
1221 im->gdes[ii].p_data[i] = paintval;
1222 /* GF_TICK: the data values are not
1223 ** relevant for min and max
1225 if (finite(paintval) && im->gdes[ii].gf != GF_TICK) {
1226 if ((isnan(minval) || paintval < minval) &&
1227 !(im->logarithmic && paintval <= 0.0))
1229 if (isnan(maxval) || paintval > maxval)
1233 im->gdes[ii].p_data[i] = DNAN;
1238 ("STACK should already be turned into LINE or AREA here");
1247 /* if min or max have not been asigned a value this is because
1248 there was no data in the graph ... this is not good ...
1249 lets set these to dummy values then ... */
1251 if (im->logarithmic) {
1252 if (isnan(minval) || isnan(maxval) || maxval <= 0) {
1253 minval = 0.0; /* catching this right away below */
1256 /* in logarithm mode, where minval is smaller or equal
1257 to 0 make the beast just way smaller than maxval */
1259 minval = maxval / 10e8;
1262 if (isnan(minval) || isnan(maxval)) {
1268 /* adjust min and max values given by the user */
1269 /* for logscale we add something on top */
1270 if (isnan(im->minval)
1271 || ((!im->rigid) && im->minval > minval)
1273 if (im->logarithmic)
1274 im->minval = minval / 2.0;
1276 im->minval = minval;
1278 if (isnan(im->maxval)
1279 || (!im->rigid && im->maxval < maxval)
1281 if (im->logarithmic)
1282 im->maxval = maxval * 2.0;
1284 im->maxval = maxval;
1287 /* make sure min is smaller than max */
1288 if (im->minval > im->maxval) {
1290 im->minval = 0.99 * im->maxval;
1292 im->minval = 1.01 * im->maxval;
1295 /* make sure min and max are not equal */
1296 if (AlmostEqual2sComplement(im->minval, im->maxval, 4)) {
1302 /* make sure min and max are not both zero */
1303 if (AlmostEqual2sComplement(im->maxval, 0, 4)) {
1312 /* identify the point where the first gridline, label ... gets placed */
1314 time_t find_first_time(
1315 time_t start, /* what is the initial time */
1316 enum tmt_en baseint, /* what is the basic interval */
1317 long basestep /* how many if these do we jump a time */
1322 localtime_r(&start, &tm);
1326 tm. tm_sec -= tm.tm_sec % basestep;
1331 tm. tm_min -= tm.tm_min % basestep;
1337 tm. tm_hour -= tm.tm_hour % basestep;
1341 /* we do NOT look at the basestep for this ... */
1348 /* we do NOT look at the basestep for this ... */
1352 tm. tm_mday -= tm.tm_wday - 1; /* -1 because we want the monday */
1354 if (tm.tm_wday == 0)
1355 tm. tm_mday -= 7; /* we want the *previous* monday */
1363 tm. tm_mon -= tm.tm_mon % basestep;
1374 tm.tm_year + 1900) %basestep;
1380 /* identify the point where the next gridline, label ... gets placed */
1381 time_t find_next_time(
1382 time_t current, /* what is the initial time */
1383 enum tmt_en baseint, /* what is the basic interval */
1384 long basestep /* how many if these do we jump a time */
1390 localtime_r(¤t, &tm);
1395 tm. tm_sec += basestep;
1399 tm. tm_min += basestep;
1403 tm. tm_hour += basestep;
1407 tm. tm_mday += basestep;
1411 tm. tm_mday += 7 * basestep;
1415 tm. tm_mon += basestep;
1419 tm. tm_year += basestep;
1421 madetime = mktime(&tm);
1422 } while (madetime == -1); /* this is necessary to skip impssible times
1423 like the daylight saving time skips */
1429 /* calculate values required for PRINT and GPRINT functions */
1434 long i, ii, validsteps;
1437 int graphelement = 0;
1440 double magfact = -1;
1445 /* wow initializing tmvdef is quite a task :-) */
1446 time_t now = time(NULL);
1448 localtime_r(&now, &tmvdef);
1449 for (i = 0; i < im->gdes_c; i++) {
1450 vidx = im->gdes[i].vidx;
1451 switch (im->gdes[i].gf) {
1454 /* PRINT and GPRINT can now print VDEF generated values.
1455 * There's no need to do any calculations on them as these
1456 * calculations were already made.
1458 if (im->gdes[vidx].gf == GF_VDEF) { /* simply use vals */
1459 printval = im->gdes[vidx].vf.val;
1460 localtime_r(&im->gdes[vidx].vf.when, &tmvdef);
1461 } else { /* need to calculate max,min,avg etcetera */
1462 max_ii = ((im->gdes[vidx].end - im->gdes[vidx].start)
1463 / im->gdes[vidx].step * im->gdes[vidx].ds_cnt);
1466 for (ii = im->gdes[vidx].ds;
1467 ii < max_ii; ii += im->gdes[vidx].ds_cnt) {
1468 if (!finite(im->gdes[vidx].data[ii]))
1470 if (isnan(printval)) {
1471 printval = im->gdes[vidx].data[ii];
1476 switch (im->gdes[i].cf) {
1480 case CF_DEVSEASONAL:
1484 printval += im->gdes[vidx].data[ii];
1487 printval = min(printval, im->gdes[vidx].data[ii]);
1491 printval = max(printval, im->gdes[vidx].data[ii]);
1494 printval = im->gdes[vidx].data[ii];
1497 if (im->gdes[i].cf == CF_AVERAGE || im->gdes[i].cf > CF_LAST) {
1498 if (validsteps > 1) {
1499 printval = (printval / validsteps);
1502 } /* prepare printval */
1504 if ((percent_s = strstr(im->gdes[i].format, "%S")) != NULL) {
1505 /* Magfact is set to -1 upon entry to print_calc. If it
1506 * is still less than 0, then we need to run auto_scale.
1507 * Otherwise, put the value into the correct units. If
1508 * the value is 0, then do not set the symbol or magnification
1509 * so next the calculation will be performed again. */
1510 if (magfact < 0.0) {
1511 auto_scale(im, &printval, &si_symb, &magfact);
1512 if (printval == 0.0)
1515 printval /= magfact;
1517 *(++percent_s) = 's';
1518 } else if (strstr(im->gdes[i].format, "%s") != NULL) {
1519 auto_scale(im, &printval, &si_symb, &magfact);
1522 if (im->gdes[i].gf == GF_PRINT) {
1525 if (im->gdes[i].strftm) {
1526 prline.u_str = malloc((FMT_LEG_LEN + 2) * sizeof(char));
1527 strftime(prline.u_str,
1528 FMT_LEG_LEN, im->gdes[i].format, &tmvdef);
1529 } else if (bad_format(im->gdes[i].format)) {
1531 ("bad format for PRINT in '%s'", im->gdes[i].format);
1535 sprintf_alloc(im->gdes[i].format, printval, si_symb);
1539 ("print[%ld]", prline_cnt++), RD_I_STR, prline);
1544 if (im->gdes[i].strftm) {
1545 strftime(im->gdes[i].legend,
1546 FMT_LEG_LEN, im->gdes[i].format, &tmvdef);
1548 if (bad_format(im->gdes[i].format)) {
1550 ("bad format for GPRINT in '%s'",
1551 im->gdes[i].format);
1554 #ifdef HAVE_SNPRINTF
1555 snprintf(im->gdes[i].legend,
1557 im->gdes[i].format, printval, si_symb);
1559 sprintf(im->gdes[i].legend,
1560 im->gdes[i].format, printval, si_symb);
1572 if (isnan(im->gdes[i].yrule)) { /* we must set this here or the legend printer can not decide to print the legend */
1573 im->gdes[i].yrule = im->gdes[vidx].vf.val;
1578 if (im->gdes[i].xrule == 0) { /* again ... the legend printer needs it */
1579 im->gdes[i].xrule = im->gdes[vidx].vf.when;
1588 #ifdef WITH_PIECHART
1596 ("STACK should already be turned into LINE or AREA here");
1601 return graphelement;
1605 /* place legends with color spots */
1611 int interleg = im->text_prop[TEXT_PROP_LEGEND].size * 2.0;
1612 int border = im->text_prop[TEXT_PROP_LEGEND].size * 2.0;
1613 int fill = 0, fill_last;
1615 int leg_x = border, leg_y = im->yimg;
1616 int leg_y_prev = im->yimg;
1619 int i, ii, mark = 0;
1620 char prt_fctn; /*special printfunctions */
1621 char default_txtalign = TXA_JUSTIFIED; /*default line orientation */
1625 if (!(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH)) {
1626 if ((legspace = malloc(im->gdes_c * sizeof(int))) == NULL) {
1627 rrd_set_error("malloc for legspace");
1631 if (im->extra_flags & FULL_SIZE_MODE)
1632 leg_y = leg_y_prev =
1633 leg_y - (int) (im->text_prop[TEXT_PROP_LEGEND].size * 1.8);
1634 for (i = 0; i < im->gdes_c; i++) {
1636 /* hide legends for rules which are not displayed */
1637 if (im->gdes[i].gf == GF_TEXTALIGN) {
1638 default_txtalign = im->gdes[i].txtalign;
1641 if (!(im->extra_flags & FORCE_RULES_LEGEND)) {
1642 if (im->gdes[i].gf == GF_HRULE
1643 && (im->gdes[i].yrule <
1644 im->minval || im->gdes[i].yrule > im->maxval))
1645 im->gdes[i].legend[0] = '\0';
1646 if (im->gdes[i].gf == GF_VRULE
1647 && (im->gdes[i].xrule <
1648 im->start || im->gdes[i].xrule > im->end))
1649 im->gdes[i].legend[0] = '\0';
1652 /* turn \\t into tab */
1653 while ((tab = strstr(im->gdes[i].legend, "\\t"))) {
1654 memmove(tab, tab + 1, strlen(tab));
1657 leg_cc = strlen(im->gdes[i].legend);
1658 /* is there a controle code ant the end of the legend string ? */
1660 && im->gdes[i].legend[leg_cc -
1662 prt_fctn = im->gdes[i].legend[leg_cc - 1];
1664 im->gdes[i].legend[leg_cc] = '\0';
1668 /* only valid control codes */
1669 if (prt_fctn != 'l' && prt_fctn != 'n' && /* a synonym for l */
1674 prt_fctn != '\0' && prt_fctn != 'g') {
1677 ("Unknown control code at the end of '%s\\%c'",
1678 im->gdes[i].legend, prt_fctn);
1682 if (prt_fctn == 'n') {
1686 /* remove exess space from the end of the legend for \g */
1687 while (prt_fctn == 'g' &&
1688 leg_cc > 0 && im->gdes[i].legend[leg_cc - 1] == ' ') {
1690 im->gdes[i].legend[leg_cc] = '\0';
1695 /* no interleg space if string ends in \g */
1696 legspace[i] = (prt_fctn == 'g' ? 0 : interleg);
1698 fill += legspace[i];
1701 gfx_get_text_width(im,
1711 im->tabwidth, im->gdes[i].legend);
1716 /* who said there was a special tag ... ? */
1717 if (prt_fctn == 'g') {
1721 if (prt_fctn == '\0') {
1722 if (i == im->gdes_c - 1 || fill > im->ximg - 2 * border) {
1723 /* just one legend item is left right or center */
1724 switch (default_txtalign) {
1739 /* is it time to place the legends ? */
1740 if (fill > im->ximg - 2 * border) {
1748 if (leg_c == 1 && prt_fctn == 'j') {
1754 if (prt_fctn != '\0') {
1756 if (leg_c >= 2 && prt_fctn == 'j') {
1757 glue = (im->ximg - fill - 2 * border) / (leg_c - 1);
1761 if (prt_fctn == 'c')
1762 leg_x = (im->ximg - fill) / 2.0;
1763 if (prt_fctn == 'r')
1764 leg_x = im->ximg - fill - border;
1765 for (ii = mark; ii <= i; ii++) {
1766 if (im->gdes[ii].legend[0] == '\0')
1767 continue; /* skip empty legends */
1768 im->gdes[ii].leg_x = leg_x;
1769 im->gdes[ii].leg_y = leg_y;
1771 gfx_get_text_width(im, leg_x,
1780 im->tabwidth, im->gdes[ii].legend)
1785 if (im->extra_flags & FULL_SIZE_MODE) {
1786 /* only add y space if there was text on the line */
1787 if (leg_x > border || prt_fctn == 's')
1788 leg_y -= im->text_prop[TEXT_PROP_LEGEND].size * 1.8;
1789 if (prt_fctn == 's')
1790 leg_y += im->text_prop[TEXT_PROP_LEGEND].size;
1792 if (leg_x > border || prt_fctn == 's')
1793 leg_y += im->text_prop[TEXT_PROP_LEGEND].size * 1.8;
1794 if (prt_fctn == 's')
1795 leg_y -= im->text_prop[TEXT_PROP_LEGEND].size;
1803 if (im->extra_flags & FULL_SIZE_MODE) {
1804 if (leg_y != leg_y_prev) {
1805 *gY = leg_y - im->text_prop[TEXT_PROP_LEGEND].size * 1.8;
1807 leg_y - im->text_prop[TEXT_PROP_LEGEND].size * 1.8;
1810 im->yimg = leg_y_prev;
1811 /* if we did place some legends we have to add vertical space */
1812 if (leg_y != im->yimg)
1813 im->yimg += im->text_prop[TEXT_PROP_LEGEND].size * 1.8;
1820 /* create a grid on the graph. it determines what to do
1821 from the values of xsize, start and end */
1823 /* the xaxis labels are determined from the number of seconds per pixel
1824 in the requested graph */
1828 int calc_horizontal_grid(
1836 int decimals, fractionals;
1838 im->ygrid_scale.labfact = 2;
1839 range = im->maxval - im->minval;
1840 scaledrange = range / im->magfact;
1841 /* does the scale of this graph make it impossible to put lines
1842 on it? If so, give up. */
1843 if (isnan(scaledrange)) {
1847 /* find grid spaceing */
1849 if (isnan(im->ygridstep)) {
1850 if (im->extra_flags & ALTYGRID) {
1851 /* find the value with max number of digits. Get number of digits */
1854 (max(fabs(im->maxval), fabs(im->minval)) *
1855 im->viewfactor / im->magfact));
1856 if (decimals <= 0) /* everything is small. make place for zero */
1858 im->ygrid_scale.gridstep =
1860 floor(log10(range * im->viewfactor / im->magfact))) /
1861 im->viewfactor * im->magfact;
1862 if (im->ygrid_scale.gridstep == 0) /* range is one -> 0.1 is reasonable scale */
1863 im->ygrid_scale.gridstep = 0.1;
1864 /* should have at least 5 lines but no more then 15 */
1865 if (range / im->ygrid_scale.gridstep < 5)
1866 im->ygrid_scale.gridstep /= 10;
1867 if (range / im->ygrid_scale.gridstep > 15)
1868 im->ygrid_scale.gridstep *= 10;
1869 if (range / im->ygrid_scale.gridstep > 5) {
1870 im->ygrid_scale.labfact = 1;
1871 if (range / im->ygrid_scale.gridstep > 8)
1872 im->ygrid_scale.labfact = 2;
1874 im->ygrid_scale.gridstep /= 5;
1875 im->ygrid_scale.labfact = 5;
1879 (im->ygrid_scale.gridstep *
1880 (double) im->ygrid_scale.labfact * im->viewfactor /
1882 if (fractionals < 0) { /* small amplitude. */
1883 int len = decimals - fractionals + 1;
1885 if (im->unitslength < len + 2)
1886 im->unitslength = len + 2;
1887 sprintf(im->ygrid_scale.labfmt,
1889 -fractionals, (im->symbol != ' ' ? " %c" : ""));
1891 int len = decimals + 1;
1893 if (im->unitslength < len + 2)
1894 im->unitslength = len + 2;
1895 sprintf(im->ygrid_scale.labfmt,
1896 "%%%d.0f%s", len, (im->symbol != ' ' ? " %c" : ""));
1899 for (i = 0; ylab[i].grid > 0; i++) {
1900 pixel = im->ysize / (scaledrange / ylab[i].grid);
1906 for (i = 0; i < 4; i++) {
1907 if (pixel * ylab[gridind].lfac[i] >=
1908 2.5 * im->text_prop[TEXT_PROP_AXIS].size) {
1909 im->ygrid_scale.labfact = ylab[gridind].lfac[i];
1914 im->ygrid_scale.gridstep = ylab[gridind].grid * im->magfact;
1917 im->ygrid_scale.gridstep = im->ygridstep;
1918 im->ygrid_scale.labfact = im->ylabfact;
1923 int draw_horizontal_grid(
1929 char graph_label[100];
1931 double X0 = im->xorigin;
1932 double X1 = im->xorigin + im->xsize;
1933 int sgrid = (int) (im->minval / im->ygrid_scale.gridstep - 1);
1934 int egrid = (int) (im->maxval / im->ygrid_scale.gridstep + 1);
1938 im->ygrid_scale.gridstep /
1939 (double) im->magfact * (double) im->viewfactor;
1940 MaxY = scaledstep * (double) egrid;
1941 for (i = sgrid; i <= egrid; i++) {
1943 im->ygrid_scale.gridstep * i);
1945 im->ygrid_scale.gridstep * (i + 1));
1947 if (floor(Y0 + 0.5) >=
1948 im->yorigin - im->ysize && floor(Y0 + 0.5) <= im->yorigin) {
1949 /* Make sure at least 2 grid labels are shown, even if it doesn't agree
1950 with the chosen settings. Add a label if required by settings, or if
1951 there is only one label so far and the next grid line is out of bounds. */
1952 if (i % im->ygrid_scale.labfact == 0
1954 && (YN < im->yorigin - im->ysize || YN > im->yorigin))) {
1955 if (im->symbol == ' ') {
1956 if (im->extra_flags & ALTYGRID) {
1957 sprintf(graph_label,
1958 im->ygrid_scale.labfmt,
1959 scaledstep * (double) i);
1962 sprintf(graph_label, "%4.1f",
1963 scaledstep * (double) i);
1965 sprintf(graph_label, "%4.0f",
1966 scaledstep * (double) i);
1970 char sisym = (i == 0 ? ' ' : im->symbol);
1972 if (im->extra_flags & ALTYGRID) {
1973 sprintf(graph_label,
1974 im->ygrid_scale.labfmt,
1975 scaledstep * (double) i, sisym);
1978 sprintf(graph_label, "%4.1f %c",
1979 scaledstep * (double) i, sisym);
1981 sprintf(graph_label, "%4.0f %c",
1982 scaledstep * (double) i, sisym);
1990 text_prop[TEXT_PROP_AXIS].
1992 im->graph_col[GRC_FONT],
1994 text_prop[TEXT_PROP_AXIS].
1997 text_prop[TEXT_PROP_AXIS].
1998 size, im->tabwidth, 0.0,
1999 GFX_H_RIGHT, GFX_V_CENTER, graph_label);
2000 gfx_line(im, X0 - 2, Y0, X0, Y0,
2001 MGRIDWIDTH, im->graph_col[GRC_MGRID]);
2002 gfx_line(im, X1, Y0, X1 + 2, Y0,
2003 MGRIDWIDTH, im->graph_col[GRC_MGRID]);
2004 gfx_dashed_line(im, X0 - 2, Y0,
2010 im->grid_dash_on, im->grid_dash_off);
2011 } else if (!(im->extra_flags & NOMINOR)) {
2014 X0, Y0, GRIDWIDTH, im->graph_col[GRC_GRID]);
2015 gfx_line(im, X1, Y0, X1 + 2, Y0,
2016 GRIDWIDTH, im->graph_col[GRC_GRID]);
2017 gfx_dashed_line(im, X0 - 1, Y0,
2021 graph_col[GRC_GRID],
2022 im->grid_dash_on, im->grid_dash_off);
2029 /* this is frexp for base 10 */
2040 iexp = floor(log(fabs(x)) / log(10));
2041 mnt = x / pow(10.0, iexp);
2044 mnt = x / pow(10.0, iexp);
2051 /* logaritmic horizontal grid */
2052 int horizontal_log_grid(
2056 double yloglab[][10] = {
2058 1.0, 10., 0.0, 0.0, 0.0, 0.0, 0.0,
2060 1.0, 5.0, 10., 0.0, 0.0, 0.0, 0.0,
2062 1.0, 2.0, 5.0, 7.0, 10., 0.0, 0.0,
2079 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} /* last line */
2081 int i, j, val_exp, min_exp;
2082 double nex; /* number of decades in data */
2083 double logscale; /* scale in logarithmic space */
2084 int exfrac = 1; /* decade spacing */
2085 int mid = -1; /* row in yloglab for major grid */
2086 double mspac; /* smallest major grid spacing (pixels) */
2087 int flab; /* first value in yloglab to use */
2088 double value, tmp, pre_value;
2090 char graph_label[100];
2092 nex = log10(im->maxval / im->minval);
2093 logscale = im->ysize / nex;
2094 /* major spacing for data with high dynamic range */
2095 while (logscale * exfrac < 3 * im->text_prop[TEXT_PROP_LEGEND].size) {
2102 /* major spacing for less dynamic data */
2104 /* search best row in yloglab */
2106 for (i = 0; yloglab[mid][i + 1] < 10.0; i++);
2107 mspac = logscale * log10(10.0 / yloglab[mid][i]);
2110 2 * im->text_prop[TEXT_PROP_LEGEND].size && yloglab[mid][0] > 0);
2113 /* find first value in yloglab */
2115 yloglab[mid][flab] < 10
2116 && frexp10(im->minval, &tmp) > yloglab[mid][flab]; flab++);
2117 if (yloglab[mid][flab] == 10.0) {
2122 if (val_exp % exfrac)
2123 val_exp += abs(-val_exp % exfrac);
2125 X1 = im->xorigin + im->xsize;
2130 value = yloglab[mid][flab] * pow(10.0, val_exp);
2131 if (AlmostEqual2sComplement(value, pre_value, 4))
2132 break; /* it seems we are not converging */
2134 Y0 = ytr(im, value);
2135 if (floor(Y0 + 0.5) <= im->yorigin - im->ysize)
2137 /* major grid line */
2139 X0 - 2, Y0, X0, Y0, MGRIDWIDTH, im->graph_col[GRC_MGRID]);
2140 gfx_line(im, X1, Y0, X1 + 2, Y0,
2141 MGRIDWIDTH, im->graph_col[GRC_MGRID]);
2142 gfx_dashed_line(im, X0 - 2, Y0,
2147 [GRC_MGRID], im->grid_dash_on, im->grid_dash_off);
2149 if (im->extra_flags & FORCE_UNITS_SI) {
2154 scale = floor(val_exp / 3.0);
2156 pvalue = pow(10.0, val_exp % 3);
2158 pvalue = pow(10.0, ((val_exp + 1) % 3) + 2);
2159 pvalue *= yloglab[mid][flab];
2160 if (((scale + si_symbcenter) < (int) sizeof(si_symbol))
2161 && ((scale + si_symbcenter) >= 0))
2162 symbol = si_symbol[scale + si_symbcenter];
2165 sprintf(graph_label, "%3.0f %c", pvalue, symbol);
2167 sprintf(graph_label, "%3.0e", value);
2171 text_prop[TEXT_PROP_AXIS].
2173 im->graph_col[GRC_FONT],
2175 text_prop[TEXT_PROP_AXIS].
2178 text_prop[TEXT_PROP_AXIS].
2179 size, im->tabwidth, 0.0,
2180 GFX_H_RIGHT, GFX_V_CENTER, graph_label);
2182 if (mid < 4 && exfrac == 1) {
2183 /* find first and last minor line behind current major line
2184 * i is the first line and j tha last */
2186 min_exp = val_exp - 1;
2187 for (i = 1; yloglab[mid][i] < 10.0; i++);
2188 i = yloglab[mid][i - 1] + 1;
2192 i = yloglab[mid][flab - 1] + 1;
2193 j = yloglab[mid][flab];
2196 /* draw minor lines below current major line */
2197 for (; i < j; i++) {
2199 value = i * pow(10.0, min_exp);
2200 if (value < im->minval)
2202 Y0 = ytr(im, value);
2203 if (floor(Y0 + 0.5) <= im->yorigin - im->ysize)
2208 X0, Y0, GRIDWIDTH, im->graph_col[GRC_GRID]);
2209 gfx_line(im, X1, Y0, X1 + 2, Y0,
2210 GRIDWIDTH, im->graph_col[GRC_GRID]);
2211 gfx_dashed_line(im, X0 - 1, Y0,
2215 graph_col[GRC_GRID],
2216 im->grid_dash_on, im->grid_dash_off);
2218 } else if (exfrac > 1) {
2219 for (i = val_exp - exfrac / 3 * 2; i < val_exp; i += exfrac / 3) {
2220 value = pow(10.0, i);
2221 if (value < im->minval)
2223 Y0 = ytr(im, value);
2224 if (floor(Y0 + 0.5) <= im->yorigin - im->ysize)
2229 X0, Y0, GRIDWIDTH, im->graph_col[GRC_GRID]);
2230 gfx_line(im, X1, Y0, X1 + 2, Y0,
2231 GRIDWIDTH, im->graph_col[GRC_GRID]);
2232 gfx_dashed_line(im, X0 - 1, Y0,
2236 graph_col[GRC_GRID],
2237 im->grid_dash_on, im->grid_dash_off);
2242 if (yloglab[mid][++flab] == 10.0) {
2248 /* draw minor lines after highest major line */
2249 if (mid < 4 && exfrac == 1) {
2250 /* find first and last minor line below current major line
2251 * i is the first line and j tha last */
2253 min_exp = val_exp - 1;
2254 for (i = 1; yloglab[mid][i] < 10.0; i++);
2255 i = yloglab[mid][i - 1] + 1;
2259 i = yloglab[mid][flab - 1] + 1;
2260 j = yloglab[mid][flab];
2263 /* draw minor lines below current major line */
2264 for (; i < j; i++) {
2266 value = i * pow(10.0, min_exp);
2267 if (value < im->minval)
2269 Y0 = ytr(im, value);
2270 if (floor(Y0 + 0.5) <= im->yorigin - im->ysize)
2274 X0 - 2, Y0, X0, Y0, GRIDWIDTH, im->graph_col[GRC_GRID]);
2275 gfx_line(im, X1, Y0, X1 + 2, Y0,
2276 GRIDWIDTH, im->graph_col[GRC_GRID]);
2277 gfx_dashed_line(im, X0 - 1, Y0,
2281 graph_col[GRC_GRID],
2282 im->grid_dash_on, im->grid_dash_off);
2285 /* fancy minor gridlines */
2286 else if (exfrac > 1) {
2287 for (i = val_exp - exfrac / 3 * 2; i < val_exp; i += exfrac / 3) {
2288 value = pow(10.0, i);
2289 if (value < im->minval)
2291 Y0 = ytr(im, value);
2292 if (floor(Y0 + 0.5) <= im->yorigin - im->ysize)
2296 X0 - 2, Y0, X0, Y0, GRIDWIDTH, im->graph_col[GRC_GRID]);
2297 gfx_line(im, X1, Y0, X1 + 2, Y0,
2298 GRIDWIDTH, im->graph_col[GRC_GRID]);
2299 gfx_dashed_line(im, X0 - 1, Y0,
2303 graph_col[GRC_GRID],
2304 im->grid_dash_on, im->grid_dash_off);
2315 int xlab_sel; /* which sort of label and grid ? */
2316 time_t ti, tilab, timajor;
2318 char graph_label[100];
2319 double X0, Y0, Y1; /* points for filled graph and more */
2322 /* the type of time grid is determined by finding
2323 the number of seconds per pixel in the graph */
2324 if (im->xlab_user.minsec == -1) {
2325 factor = (im->end - im->start) / im->xsize;
2327 while (xlab[xlab_sel + 1].minsec !=
2328 -1 && xlab[xlab_sel + 1].minsec <= factor) {
2330 } /* pick the last one */
2331 while (xlab[xlab_sel - 1].minsec ==
2332 xlab[xlab_sel].minsec
2333 && xlab[xlab_sel].length > (im->end - im->start)) {
2335 } /* go back to the smallest size */
2336 im->xlab_user.gridtm = xlab[xlab_sel].gridtm;
2337 im->xlab_user.gridst = xlab[xlab_sel].gridst;
2338 im->xlab_user.mgridtm = xlab[xlab_sel].mgridtm;
2339 im->xlab_user.mgridst = xlab[xlab_sel].mgridst;
2340 im->xlab_user.labtm = xlab[xlab_sel].labtm;
2341 im->xlab_user.labst = xlab[xlab_sel].labst;
2342 im->xlab_user.precis = xlab[xlab_sel].precis;
2343 im->xlab_user.stst = xlab[xlab_sel].stst;
2346 /* y coords are the same for every line ... */
2348 Y1 = im->yorigin - im->ysize;
2349 /* paint the minor grid */
2350 if (!(im->extra_flags & NOMINOR)) {
2351 for (ti = find_first_time(im->start,
2359 find_first_time(im->start,
2366 find_next_time(ti, im->xlab_user.gridtm, im->xlab_user.gridst)
2368 /* are we inside the graph ? */
2369 if (ti < im->start || ti > im->end)
2371 while (timajor < ti) {
2372 timajor = find_next_time(timajor,
2375 mgridtm, im->xlab_user.mgridst);
2378 continue; /* skip as falls on major grid line */
2380 gfx_line(im, X0, Y1 - 2, X0, Y1,
2381 GRIDWIDTH, im->graph_col[GRC_GRID]);
2382 gfx_line(im, X0, Y0, X0, Y0 + 2,
2383 GRIDWIDTH, im->graph_col[GRC_GRID]);
2384 gfx_dashed_line(im, X0, Y0 + 1, X0,
2387 graph_col[GRC_GRID],
2388 im->grid_dash_on, im->grid_dash_off);
2392 /* paint the major grid */
2393 for (ti = find_first_time(im->start,
2401 ti = find_next_time(ti, im->xlab_user.mgridtm, im->xlab_user.mgridst)
2403 /* are we inside the graph ? */
2404 if (ti < im->start || ti > im->end)
2407 gfx_line(im, X0, Y1 - 2, X0, Y1,
2408 MGRIDWIDTH, im->graph_col[GRC_MGRID]);
2409 gfx_line(im, X0, Y0, X0, Y0 + 3,
2410 MGRIDWIDTH, im->graph_col[GRC_MGRID]);
2411 gfx_dashed_line(im, X0, Y0 + 3, X0,
2415 [GRC_MGRID], im->grid_dash_on, im->grid_dash_off);
2417 /* paint the labels below the graph */
2419 find_first_time(im->start -
2428 im->xlab_user.precis / 2;
2429 ti = find_next_time(ti, im->xlab_user.labtm, im->xlab_user.labst)
2431 tilab = ti + im->xlab_user.precis / 2; /* correct time for the label */
2432 /* are we inside the graph ? */
2433 if (tilab < im->start || tilab > im->end)
2436 localtime_r(&tilab, &tm);
2437 strftime(graph_label, 99, im->xlab_user.stst, &tm);
2439 # error "your libc has no strftime I guess we'll abort the exercise here."
2444 im->graph_col[GRC_FONT],
2446 text_prop[TEXT_PROP_AXIS].
2449 text_prop[TEXT_PROP_AXIS].
2450 size, im->tabwidth, 0.0,
2451 GFX_H_CENTER, GFX_V_TOP, graph_label);
2460 /* draw x and y axis */
2461 /* gfx_line ( im->canvas, im->xorigin+im->xsize,im->yorigin,
2462 im->xorigin+im->xsize,im->yorigin-im->ysize,
2463 GRIDWIDTH, im->graph_col[GRC_AXIS]);
2465 gfx_line ( im->canvas, im->xorigin,im->yorigin-im->ysize,
2466 im->xorigin+im->xsize,im->yorigin-im->ysize,
2467 GRIDWIDTH, im->graph_col[GRC_AXIS]); */
2469 gfx_line(im, im->xorigin - 4,
2471 im->xorigin + im->xsize +
2472 4, im->yorigin, MGRIDWIDTH, im->graph_col[GRC_AXIS]);
2473 gfx_line(im, im->xorigin,
2476 im->yorigin - im->ysize -
2477 4, MGRIDWIDTH, im->graph_col[GRC_AXIS]);
2478 /* arrow for X and Y axis direction */
2479 gfx_new_area(im, im->xorigin + im->xsize + 2, im->yorigin - 3, im->xorigin + im->xsize + 2, im->yorigin + 3, im->xorigin + im->xsize + 7, im->yorigin, /* horyzontal */
2480 im->graph_col[GRC_ARROW]);
2482 gfx_new_area(im, im->xorigin - 3, im->yorigin - im->ysize - 2, im->xorigin + 3, im->yorigin - im->ysize - 2, im->xorigin, im->yorigin - im->ysize - 7, /* vertical */
2483 im->graph_col[GRC_ARROW]);
2492 double X0, Y0; /* points for filled graph and more */
2493 struct gfx_color_t water_color;
2495 /* draw 3d border */
2496 gfx_new_area(im, 0, im->yimg,
2497 2, im->yimg - 2, 2, 2, im->graph_col[GRC_SHADEA]);
2498 gfx_add_point(im, im->ximg - 2, 2);
2499 gfx_add_point(im, im->ximg, 0);
2500 gfx_add_point(im, 0, 0);
2502 gfx_new_area(im, 2, im->yimg - 2,
2504 im->yimg - 2, im->ximg - 2, 2, im->graph_col[GRC_SHADEB]);
2505 gfx_add_point(im, im->ximg, 0);
2506 gfx_add_point(im, im->ximg, im->yimg);
2507 gfx_add_point(im, 0, im->yimg);
2509 if (im->draw_x_grid == 1)
2511 if (im->draw_y_grid == 1) {
2512 if (im->logarithmic) {
2513 res = horizontal_log_grid(im);
2515 res = draw_horizontal_grid(im);
2518 /* dont draw horizontal grid if there is no min and max val */
2520 char *nodata = "No Data found";
2522 gfx_text(im, im->ximg / 2,
2525 im->graph_col[GRC_FONT],
2527 text_prop[TEXT_PROP_AXIS].
2530 text_prop[TEXT_PROP_AXIS].
2531 size, im->tabwidth, 0.0,
2532 GFX_H_CENTER, GFX_V_CENTER, nodata);
2536 /* yaxis unit description */
2541 im->graph_col[GRC_FONT],
2543 text_prop[TEXT_PROP_UNIT].
2546 text_prop[TEXT_PROP_UNIT].
2548 RRDGRAPH_YLEGEND_ANGLE, GFX_H_CENTER, GFX_V_CENTER, im->ylegend);
2552 im->graph_col[GRC_FONT],
2554 text_prop[TEXT_PROP_TITLE].
2557 text_prop[TEXT_PROP_TITLE].
2558 size, im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_TOP, im->title);
2559 /* rrdtool 'logo' */
2560 water_color = im->graph_col[GRC_FONT];
2561 water_color.alpha = 0.3;
2562 gfx_text(im, im->ximg - 4, 5,
2565 text_prop[TEXT_PROP_AXIS].
2566 font, 5.5, im->tabwidth,
2567 -90, GFX_H_LEFT, GFX_V_TOP, "RRDTOOL / TOBI OETIKER");
2568 /* graph watermark */
2569 if (im->watermark[0] != '\0') {
2571 im->ximg / 2, im->yimg - 6,
2574 text_prop[TEXT_PROP_AXIS].
2575 font, 5.5, im->tabwidth, 0,
2576 GFX_H_CENTER, GFX_V_BOTTOM, im->watermark);
2580 if (!(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH)) {
2581 for (i = 0; i < im->gdes_c; i++) {
2582 if (im->gdes[i].legend[0] == '\0')
2584 /* im->gdes[i].leg_y is the bottom of the legend */
2585 X0 = im->gdes[i].leg_x;
2586 Y0 = im->gdes[i].leg_y;
2587 gfx_text(im, X0, Y0,
2588 im->graph_col[GRC_FONT],
2591 [TEXT_PROP_LEGEND].font,
2594 [TEXT_PROP_LEGEND].size,
2596 GFX_H_LEFT, GFX_V_BOTTOM, im->gdes[i].legend);
2597 /* The legend for GRAPH items starts with "M " to have
2598 enough space for the box */
2599 if (im->gdes[i].gf != GF_PRINT &&
2600 im->gdes[i].gf != GF_GPRINT && im->gdes[i].gf != GF_COMMENT) {
2604 boxH = gfx_get_text_width(im, 0,
2612 size, im->tabwidth, "o") * 1.2;
2614 /* shift the box up a bit */
2616 /* make sure transparent colors show up the same way as in the graph */
2619 X0, Y0, X0 + boxH, Y0, im->graph_col[GRC_BACK]);
2620 gfx_add_point(im, X0 + boxH, Y0 - boxV);
2622 gfx_new_area(im, X0, Y0 - boxV, X0,
2623 Y0, X0 + boxH, Y0, im->gdes[i].col);
2624 gfx_add_point(im, X0 + boxH, Y0 - boxV);
2627 cairo_new_path(im->cr);
2628 cairo_set_line_width(im->cr, 1.0);
2631 gfx_line_fit(im, &X0, &Y0);
2632 gfx_line_fit(im, &X1, &Y1);
2633 cairo_move_to(im->cr, X0, Y0);
2634 cairo_line_to(im->cr, X1, Y0);
2635 cairo_line_to(im->cr, X1, Y1);
2636 cairo_line_to(im->cr, X0, Y1);
2637 cairo_close_path(im->cr);
2638 cairo_set_source_rgba(im->cr,
2650 blue, im->graph_col[GRC_FRAME].alpha);
2651 if (im->gdes[i].dash) {
2652 /* make box borders in legend dashed if the graph is dashed */
2656 cairo_set_dash(im->cr, dashes, 1, 0.0);
2658 cairo_stroke(im->cr);
2659 cairo_restore(im->cr);
2666 /*****************************************************
2667 * lazy check make sure we rely need to create this graph
2668 *****************************************************/
2675 struct stat imgstat;
2678 return 0; /* no lazy option */
2679 if (strlen(im->graphfile) == 0)
2680 return 0; /* inmemory option */
2681 if (stat(im->graphfile, &imgstat) != 0)
2682 return 0; /* can't stat */
2683 /* one pixel in the existing graph is more then what we would
2685 if (time(NULL) - imgstat.st_mtime > (im->end - im->start) / im->xsize)
2687 if ((fd = fopen(im->graphfile, "rb")) == NULL)
2688 return 0; /* the file does not exist */
2689 switch (im->imgformat) {
2691 size = PngSize(fd, &(im->ximg), &(im->yimg));
2701 int graph_size_location(
2706 /* The actual size of the image to draw is determined from
2707 ** several sources. The size given on the command line is
2708 ** the graph area but we need more as we have to draw labels
2709 ** and other things outside the graph area
2712 int Xvertical = 0, Ytitle =
2713 0, Xylabel = 0, Xmain = 0, Ymain =
2714 0, Yxlabel = 0, Xspacing = 15, Yspacing = 15, Ywatermark = 4;
2716 if (im->extra_flags & ONLY_GRAPH) {
2718 im->ximg = im->xsize;
2719 im->yimg = im->ysize;
2720 im->yorigin = im->ysize;
2725 /** +---+--------------------------------------------+
2726 ** | y |...............graph title..................|
2727 ** | +---+-------------------------------+--------+
2730 ** | i | a | | pie |
2731 ** | s | x | main graph area | chart |
2736 ** | l | b +-------------------------------+--------+
2737 ** | e | l | x axis labels | |
2738 ** +---+---+-------------------------------+--------+
2739 ** |....................legends.....................|
2740 ** +------------------------------------------------+
2742 ** +------------------------------------------------+
2745 if (im->ylegend[0] != '\0') {
2746 Xvertical = im->text_prop[TEXT_PROP_UNIT].size * 2;
2749 if (im->title[0] != '\0') {
2750 /* The title is placed "inbetween" two text lines so it
2751 ** automatically has some vertical spacing. The horizontal
2752 ** spacing is added here, on each side.
2754 /* if necessary, reduce the font size of the title until it fits the image width */
2755 Ytitle = im->text_prop[TEXT_PROP_TITLE].size * 2.6 + 10;
2759 if (im->draw_x_grid) {
2760 Yxlabel = im->text_prop[TEXT_PROP_AXIS].size * 2.5;
2762 if (im->draw_y_grid || im->forceleftspace) {
2764 gfx_get_text_width(im, 0,
2772 size, im->tabwidth, "0") * im->unitslength;
2776 if (im->extra_flags & FULL_SIZE_MODE) {
2777 /* The actual size of the image to draw has been determined by the user.
2778 ** The graph area is the space remaining after accounting for the legend,
2779 ** the watermark, the pie chart, the axis labels, and the title.
2782 im->ximg = im->xsize;
2783 im->yimg = im->ysize;
2784 im->yorigin = im->ysize;
2787 im->yorigin += Ytitle;
2788 /* Now calculate the total size. Insert some spacing where
2789 desired. im->xorigin and im->yorigin need to correspond
2790 with the lower left corner of the main graph area or, if
2791 this one is not set, the imaginary box surrounding the
2793 /* Initial size calculation for the main graph area */
2794 Xmain = im->ximg - (Xylabel + 2 * Xspacing);
2796 Xmain -= Xspacing; /* put space between main graph area and right edge */
2797 im->xorigin = Xspacing + Xylabel;
2798 /* the length of the title should not influence with width of the graph
2799 if (Xtitle > im->ximg) im->ximg = Xtitle; */
2800 if (Xvertical) { /* unit description */
2802 im->xorigin += Xvertical;
2806 /* The vertical size of the image is known in advance. The main graph area
2807 ** (Ymain) and im->yorigin must be set according to the space requirements
2808 ** of the legend and the axis labels.
2810 if (im->extra_flags & NOLEGEND) {
2811 /* set dimensions correctly if using full size mode with no legend */
2814 im->text_prop[TEXT_PROP_AXIS].size * 2.5 - Yspacing;
2815 Ymain = im->yorigin;
2817 /* Determine where to place the legends onto the image.
2818 ** Set Ymain and adjust im->yorigin to match the space requirements.
2820 if (leg_place(im, &Ymain) == -1)
2825 /* remove title space *or* some padding above the graph from the main graph area */
2829 Ymain -= 1.5 * Yspacing;
2832 /* watermark doesn't seem to effect the vertical size of the main graph area, oh well! */
2833 if (im->watermark[0] != '\0') {
2834 Ymain -= Ywatermark;
2838 } else { /* dimension options -width and -height refer to the dimensions of the main graph area */
2840 /* The actual size of the image to draw is determined from
2841 ** several sources. The size given on the command line is
2842 ** the graph area but we need more as we have to draw labels
2843 ** and other things outside the graph area.
2846 if (im->ylegend[0] != '\0') {
2847 Xvertical = im->text_prop[TEXT_PROP_UNIT].size * 2;
2851 if (im->title[0] != '\0') {
2852 /* The title is placed "inbetween" two text lines so it
2853 ** automatically has some vertical spacing. The horizontal
2854 ** spacing is added here, on each side.
2856 /* don't care for the with of the title
2857 Xtitle = gfx_get_text_width(im->canvas, 0,
2858 im->text_prop[TEXT_PROP_TITLE].font,
2859 im->text_prop[TEXT_PROP_TITLE].size,
2861 im->title, 0) + 2*Xspacing; */
2862 Ytitle = im->text_prop[TEXT_PROP_TITLE].size * 2.6 + 10;
2869 /* Now calculate the total size. Insert some spacing where
2870 desired. im->xorigin and im->yorigin need to correspond
2871 with the lower left corner of the main graph area or, if
2872 this one is not set, the imaginary box surrounding the
2875 /* The legend width cannot yet be determined, as a result we
2876 ** have problems adjusting the image to it. For now, we just
2877 ** forget about it at all; the legend will have to fit in the
2878 ** size already allocated.
2880 im->ximg = Xylabel + Xmain + 2 * Xspacing;
2882 im->ximg += Xspacing;
2883 im->xorigin = Xspacing + Xylabel;
2884 /* the length of the title should not influence with width of the graph
2885 if (Xtitle > im->ximg) im->ximg = Xtitle; */
2886 if (Xvertical) { /* unit description */
2887 im->ximg += Xvertical;
2888 im->xorigin += Xvertical;
2891 /* The vertical size is interesting... we need to compare
2892 ** the sum of {Ytitle, Ymain, Yxlabel, Ylegend, Ywatermark} with
2893 ** Yvertical however we need to know {Ytitle+Ymain+Yxlabel}
2894 ** in order to start even thinking about Ylegend or Ywatermark.
2896 ** Do it in three portions: First calculate the inner part,
2897 ** then do the legend, then adjust the total height of the img,
2898 ** adding space for a watermark if one exists;
2900 /* reserve space for main and/or pie */
2901 im->yimg = Ymain + Yxlabel;
2902 im->yorigin = im->yimg - Yxlabel;
2903 /* reserve space for the title *or* some padding above the graph */
2906 im->yorigin += Ytitle;
2908 im->yimg += 1.5 * Yspacing;
2909 im->yorigin += 1.5 * Yspacing;
2911 /* reserve space for padding below the graph */
2912 im->yimg += Yspacing;
2913 /* Determine where to place the legends onto the image.
2914 ** Adjust im->yimg to match the space requirements.
2916 if (leg_place(im, 0) == -1)
2918 if (im->watermark[0] != '\0') {
2919 im->yimg += Ywatermark;
2927 static cairo_status_t cairo_output(
2931 unsigned int length)
2933 image_desc_t *im = closure;
2935 im->rendered_image =
2936 realloc(im->rendered_image, im->rendered_image_size + length);
2937 if (im->rendered_image == NULL)
2938 return CAIRO_STATUS_WRITE_ERROR;
2939 memcpy(im->rendered_image + im->rendered_image_size, data, length);
2940 im->rendered_image_size += length;
2941 return CAIRO_STATUS_SUCCESS;
2944 /* draw that picture thing ... */
2949 int lazy = lazy_check(im);
2950 double areazero = 0.0;
2951 graph_desc_t *lastgdes = NULL;
2953 PangoFontMap *font_map = pango_cairo_font_map_get_default();
2955 /* if we are lazy and there is nothing to PRINT ... quit now */
2956 if (lazy && im->prt_c == 0)
2958 /* pull the data from the rrd files ... */
2959 if (data_fetch(im) == -1)
2961 /* evaluate VDEF and CDEF operations ... */
2962 if (data_calc(im) == -1)
2964 /* calculate and PRINT and GPRINT definitions. We have to do it at
2965 * this point because it will affect the length of the legends
2966 * if there are no graph elements we stop here ...
2967 * if we are lazy, try to quit ...
2972 if ((i == 0) || lazy)
2974 /**************************************************************
2975 *** Calculating sizes and locations became a bit confusing ***
2976 *** so I moved this into a separate function. ***
2977 **************************************************************/
2978 if (graph_size_location(im, i) == -1)
2981 info.u_cnt = im->xorigin;
2982 grinfo_push(im, sprintf_alloc("graph_left"), RD_I_CNT, info);
2983 info.u_cnt = im->yorigin - im->ysize;
2984 grinfo_push(im, sprintf_alloc("graph_top"), RD_I_CNT, info);
2985 info.u_cnt = im->xsize;
2986 grinfo_push(im, sprintf_alloc("graph_width"), RD_I_CNT, info);
2987 info.u_cnt = im->ysize;
2988 grinfo_push(im, sprintf_alloc("graph_height"), RD_I_CNT, info);
2989 info.u_cnt = im->ximg;
2990 grinfo_push(im, sprintf_alloc("image_width"), RD_I_CNT, info);
2991 info.u_cnt = im->yimg;
2992 grinfo_push(im, sprintf_alloc("image_height"), RD_I_CNT, info);
2994 /* get actual drawing data and find min and max values */
2995 if (data_proc(im) == -1)
2997 if (!im->logarithmic) {
3001 /* identify si magnitude Kilo, Mega Giga ? */
3002 if (!im->rigid && !im->logarithmic)
3003 expand_range(im); /* make sure the upper and lower limit are
3006 info.u_val = im->minval;
3007 grinfo_push(im, sprintf_alloc("value_min"), RD_I_VAL, info);
3008 info.u_val = im->maxval;
3009 grinfo_push(im, sprintf_alloc("value_max"), RD_I_VAL, info);
3011 if (!calc_horizontal_grid(im))
3016 apply_gridfit(im); */
3017 /* the actual graph is created by going through the individual
3018 graph elements and then drawing them */
3019 cairo_surface_destroy(im->surface);
3020 switch (im->imgformat) {
3023 cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
3024 im->ximg * im->zoom,
3025 im->yimg * im->zoom);
3029 im->surface = strlen(im->graphfile)
3030 ? cairo_pdf_surface_create(im->graphfile, im->ximg * im->zoom,
3031 im->yimg * im->zoom)
3032 : cairo_pdf_surface_create_for_stream
3033 (&cairo_output, im, im->ximg * im->zoom, im->yimg * im->zoom);
3037 im->surface = strlen(im->graphfile)
3039 cairo_ps_surface_create(im->graphfile, im->ximg * im->zoom,
3040 im->yimg * im->zoom)
3041 : cairo_ps_surface_create_for_stream
3042 (&cairo_output, im, im->ximg * im->zoom, im->yimg * im->zoom);
3046 im->surface = strlen(im->graphfile)
3048 cairo_svg_surface_create(im->
3050 im->ximg * im->zoom, im->yimg * im->zoom)
3051 : cairo_svg_surface_create_for_stream
3052 (&cairo_output, im, im->ximg * im->zoom, im->yimg * im->zoom);
3053 cairo_svg_surface_restrict_to_version
3054 (im->surface, CAIRO_SVG_VERSION_1_1);
3057 im->cr = cairo_create(im->surface);
3058 cairo_set_antialias(im->cr, im->graph_antialias);
3059 cairo_scale(im->cr, im->zoom, im->zoom);
3060 pango_cairo_font_map_set_resolution(PANGO_CAIRO_FONT_MAP(font_map), 100);
3061 gfx_new_area(im, 0, 0, 0, im->yimg,
3062 im->ximg, im->yimg, im->graph_col[GRC_BACK]);
3063 gfx_add_point(im, im->ximg, 0);
3065 gfx_new_area(im, im->xorigin,
3068 im->xsize, im->yorigin,
3071 im->yorigin - im->ysize, im->graph_col[GRC_CANVAS]);
3072 gfx_add_point(im, im->xorigin, im->yorigin - im->ysize);
3074 if (im->minval > 0.0)
3075 areazero = im->minval;
3076 if (im->maxval < 0.0)
3077 areazero = im->maxval;
3078 for (i = 0; i < im->gdes_c; i++) {
3079 switch (im->gdes[i].gf) {
3093 for (ii = 0; ii < im->xsize; ii++) {
3094 if (!isnan(im->gdes[i].p_data[ii])
3095 && im->gdes[i].p_data[ii] != 0.0) {
3096 if (im->gdes[i].yrule > 0) {
3103 im->ysize, 1.0, im->gdes[i].col);
3104 } else if (im->gdes[i].yrule < 0) {
3107 im->yorigin - im->ysize,
3112 im->ysize, 1.0, im->gdes[i].col);
3119 /* fix data points at oo and -oo */
3120 for (ii = 0; ii < im->xsize; ii++) {
3121 if (isinf(im->gdes[i].p_data[ii])) {
3122 if (im->gdes[i].p_data[ii] > 0) {
3123 im->gdes[i].p_data[ii] = im->maxval;
3125 im->gdes[i].p_data[ii] = im->minval;
3131 /* *******************************************************
3136 -------|--t-1--t--------------------------------
3138 if we know the value at time t was a then
3139 we draw a square from t-1 to t with the value a.
3141 ********************************************************* */
3142 if (im->gdes[i].col.alpha != 0.0) {
3143 /* GF_LINE and friend */
3144 if (im->gdes[i].gf == GF_LINE) {
3145 double last_y = 0.0;
3149 cairo_new_path(im->cr);
3150 cairo_set_line_width(im->cr, im->gdes[i].linewidth);
3151 if (im->gdes[i].dash) {
3152 cairo_set_dash(im->cr,
3153 im->gdes[i].p_dashes,
3154 im->gdes[i].ndash, im->gdes[i].offset);
3157 for (ii = 1; ii < im->xsize; ii++) {
3158 if (isnan(im->gdes[i].p_data[ii])
3159 || (im->slopemode == 1
3160 && isnan(im->gdes[i].p_data[ii - 1]))) {
3165 last_y = ytr(im, im->gdes[i].p_data[ii]);
3166 if (im->slopemode == 0) {
3167 double x = ii - 1 + im->xorigin;
3170 gfx_line_fit(im, &x, &y);
3171 cairo_move_to(im->cr, x, y);
3172 x = ii + im->xorigin;
3174 gfx_line_fit(im, &x, &y);
3175 cairo_line_to(im->cr, x, y);
3177 double x = ii - 1 + im->xorigin;
3179 ytr(im, im->gdes[i].p_data[ii - 1]);
3180 gfx_line_fit(im, &x, &y);
3181 cairo_move_to(im->cr, x, y);
3182 x = ii + im->xorigin;
3184 gfx_line_fit(im, &x, &y);
3185 cairo_line_to(im->cr, x, y);
3189 double x1 = ii + im->xorigin;
3190 double y1 = ytr(im, im->gdes[i].p_data[ii]);
3192 if (im->slopemode == 0
3193 && !AlmostEqual2sComplement(y1, last_y, 4)) {
3194 double x = ii - 1 + im->xorigin;
3197 gfx_line_fit(im, &x, &y);
3198 cairo_line_to(im->cr, x, y);
3201 gfx_line_fit(im, &x1, &y1);
3202 cairo_line_to(im->cr, x1, y1);
3205 cairo_set_source_rgba(im->cr,
3211 col.blue, im->gdes[i].col.alpha);
3212 cairo_set_line_cap(im->cr, CAIRO_LINE_CAP_ROUND);
3213 cairo_set_line_join(im->cr, CAIRO_LINE_JOIN_ROUND);
3214 cairo_stroke(im->cr);
3215 cairo_restore(im->cr);
3219 (double *) malloc(sizeof(double) * im->xsize * 2);
3221 (double *) malloc(sizeof(double) * im->xsize * 2);
3223 (double *) malloc(sizeof(double) * im->xsize * 2);
3225 (double *) malloc(sizeof(double) * im->xsize * 2);
3228 for (ii = 0; ii <= im->xsize; ii++) {
3231 if (idxI > 0 && (drawem != 0 || ii == im->xsize)) {
3237 AlmostEqual2sComplement(foreY
3241 AlmostEqual2sComplement(foreY
3251 foreY[cntI], im->gdes[i].col);
3252 while (cntI < idxI) {
3257 AlmostEqual2sComplement(foreY
3261 AlmostEqual2sComplement(foreY
3268 gfx_add_point(im, foreX[cntI], foreY[cntI]);
3270 gfx_add_point(im, backX[idxI], backY[idxI]);
3276 AlmostEqual2sComplement(backY
3280 AlmostEqual2sComplement(backY
3287 gfx_add_point(im, backX[idxI], backY[idxI]);
3297 if (ii == im->xsize)
3299 if (im->slopemode == 0 && ii == 0) {
3302 if (isnan(im->gdes[i].p_data[ii])) {
3306 ytop = ytr(im, im->gdes[i].p_data[ii]);
3307 if (lastgdes && im->gdes[i].stack) {
3308 ybase = ytr(im, lastgdes->p_data[ii]);
3310 ybase = ytr(im, areazero);
3312 if (ybase == ytop) {
3318 double extra = ytop;
3323 if (im->slopemode == 0) {
3324 backY[++idxI] = ybase - 0.2;
3325 backX[idxI] = ii + im->xorigin - 1;
3326 foreY[idxI] = ytop + 0.2;
3327 foreX[idxI] = ii + im->xorigin - 1;
3329 backY[++idxI] = ybase - 0.2;
3330 backX[idxI] = ii + im->xorigin;
3331 foreY[idxI] = ytop + 0.2;
3332 foreX[idxI] = ii + im->xorigin;
3334 /* close up any remaining area */
3339 } /* else GF_LINE */
3341 /* if color != 0x0 */
3342 /* make sure we do not run into trouble when stacking on NaN */
3343 for (ii = 0; ii < im->xsize; ii++) {
3344 if (isnan(im->gdes[i].p_data[ii])) {
3345 if (lastgdes && (im->gdes[i].stack)) {
3346 im->gdes[i].p_data[ii] = lastgdes->p_data[ii];
3348 im->gdes[i].p_data[ii] = areazero;
3352 lastgdes = &(im->gdes[i]);
3356 ("STACK should already be turned into LINE or AREA here");
3362 /* grid_paint also does the text */
3363 if (!(im->extra_flags & ONLY_GRAPH))
3365 if (!(im->extra_flags & ONLY_GRAPH))
3367 /* the RULES are the last thing to paint ... */
3368 for (i = 0; i < im->gdes_c; i++) {
3370 switch (im->gdes[i].gf) {
3372 if (im->gdes[i].yrule >= im->minval
3373 && im->gdes[i].yrule <= im->maxval) {
3375 if (im->gdes[i].dash) {
3376 cairo_set_dash(im->cr,
3377 im->gdes[i].p_dashes,
3378 im->gdes[i].ndash, im->gdes[i].offset);
3380 gfx_line(im, im->xorigin,
3381 ytr(im, im->gdes[i].yrule),
3382 im->xorigin + im->xsize,
3383 ytr(im, im->gdes[i].yrule), 1.0, im->gdes[i].col);
3384 cairo_stroke(im->cr);
3385 cairo_restore(im->cr);
3389 if (im->gdes[i].xrule >= im->start
3390 && im->gdes[i].xrule <= im->end) {
3392 if (im->gdes[i].dash) {
3393 cairo_set_dash(im->cr,
3394 im->gdes[i].p_dashes,
3395 im->gdes[i].ndash, im->gdes[i].offset);
3398 xtr(im, im->gdes[i].xrule),
3399 im->yorigin, xtr(im,
3403 im->yorigin - im->ysize, 1.0, im->gdes[i].col);
3404 cairo_stroke(im->cr);
3405 cairo_restore(im->cr);
3414 switch (im->imgformat) {
3417 cairo_status_t status;
3419 status = strlen(im->graphfile) ?
3420 cairo_surface_write_to_png(im->surface, im->graphfile)
3421 : cairo_surface_write_to_png_stream(im->surface, &cairo_output,
3424 if (status != CAIRO_STATUS_SUCCESS) {
3425 rrd_set_error("Could not save png to '%s'", im->graphfile);
3431 if (strlen(im->graphfile)) {
3432 cairo_show_page(im->cr);
3434 cairo_surface_finish(im->surface);
3443 /*****************************************************
3445 *****************************************************/
3452 if ((im->gdes = (graph_desc_t *)
3453 rrd_realloc(im->gdes, (im->gdes_c)
3454 * sizeof(graph_desc_t))) == NULL) {
3455 rrd_set_error("realloc graph_descs");
3460 im->gdes[im->gdes_c - 1].step = im->step;
3461 im->gdes[im->gdes_c - 1].step_orig = im->step;
3462 im->gdes[im->gdes_c - 1].stack = 0;
3463 im->gdes[im->gdes_c - 1].linewidth = 0;
3464 im->gdes[im->gdes_c - 1].debug = 0;
3465 im->gdes[im->gdes_c - 1].start = im->start;
3466 im->gdes[im->gdes_c - 1].start_orig = im->start;
3467 im->gdes[im->gdes_c - 1].end = im->end;
3468 im->gdes[im->gdes_c - 1].end_orig = im->end;
3469 im->gdes[im->gdes_c - 1].vname[0] = '\0';
3470 im->gdes[im->gdes_c - 1].data = NULL;
3471 im->gdes[im->gdes_c - 1].ds_namv = NULL;
3472 im->gdes[im->gdes_c - 1].data_first = 0;
3473 im->gdes[im->gdes_c - 1].p_data = NULL;
3474 im->gdes[im->gdes_c - 1].rpnp = NULL;
3475 im->gdes[im->gdes_c - 1].p_dashes = NULL;
3476 im->gdes[im->gdes_c - 1].shift = 0.0;
3477 im->gdes[im->gdes_c - 1].dash = 0;
3478 im->gdes[im->gdes_c - 1].ndash = 0;
3479 im->gdes[im->gdes_c - 1].offset = 0;
3480 im->gdes[im->gdes_c - 1].col.red = 0.0;
3481 im->gdes[im->gdes_c - 1].col.green = 0.0;
3482 im->gdes[im->gdes_c - 1].col.blue = 0.0;
3483 im->gdes[im->gdes_c - 1].col.alpha = 0.0;
3484 im->gdes[im->gdes_c - 1].legend[0] = '\0';
3485 im->gdes[im->gdes_c - 1].format[0] = '\0';
3486 im->gdes[im->gdes_c - 1].strftm = 0;
3487 im->gdes[im->gdes_c - 1].rrd[0] = '\0';
3488 im->gdes[im->gdes_c - 1].ds = -1;
3489 im->gdes[im->gdes_c - 1].cf_reduce = CF_AVERAGE;
3490 im->gdes[im->gdes_c - 1].cf = CF_AVERAGE;
3491 im->gdes[im->gdes_c - 1].yrule = DNAN;
3492 im->gdes[im->gdes_c - 1].xrule = 0;
3496 /* copies input untill the first unescaped colon is found
3497 or until input ends. backslashes have to be escaped as well */
3499 const char *const input,
3505 for (inp = 0; inp < len && input[inp] != ':' && input[inp] != '\0'; inp++) {
3506 if (input[inp] == '\\'
3507 && input[inp + 1] != '\0'
3508 && (input[inp + 1] == '\\' || input[inp + 1] == ':')) {
3509 output[outp++] = input[++inp];
3511 output[outp++] = input[inp];
3514 output[outp] = '\0';
3518 /* Now just a wrapper around rrd_graph_v */
3530 info_t *grinfo = NULL;
3533 grinfo = rrd_graph_v(argc, argv);
3539 if (strcmp(walker->key, "image_info") == 0) {
3542 rrd_realloc((*prdata),
3543 (prlines + 1) * sizeof(char *))) == NULL) {
3544 rrd_set_error("realloc prdata");
3547 /* imginfo goes to position 0 in the prdata array */
3548 (*prdata)[prlines - 1] = malloc((strlen(walker->value.u_str)
3549 + 2) * sizeof(char));
3550 strcpy((*prdata)[prlines - 1], walker->value.u_str);
3551 (*prdata)[prlines] = NULL;
3553 /* skip anything else */
3554 walker = walker->next;
3558 if (strcmp(walker->key, "image_width") == 0) {
3559 *xsize = walker->value.u_int;
3560 } else if (strcmp(walker->key, "image_height") == 0) {
3561 *ysize = walker->value.u_int;
3562 } else if (strcmp(walker->key, "value_min") == 0) {
3563 *ymin = walker->value.u_val;
3564 } else if (strcmp(walker->key, "value_max") == 0) {
3565 *ymax = walker->value.u_val;
3566 } else if (strncmp(walker->key, "print", 5) == 0) { /* keys are prdate[0..] */
3569 rrd_realloc((*prdata),
3570 (prlines + 1) * sizeof(char *))) == NULL) {
3571 rrd_set_error("realloc prdata");
3574 (*prdata)[prlines - 1] = malloc((strlen(walker->value.u_str)
3575 + 2) * sizeof(char));
3576 (*prdata)[prlines] = NULL;
3577 strcpy((*prdata)[prlines - 1], walker->value.u_str);
3578 } else if (strcmp(walker->key, "image") == 0) {
3579 fwrite(walker->value.u_blo.ptr, walker->value.u_blo.size, 1,
3580 (stream ? stream : stdout));
3582 /* skip anything else */
3583 walker = walker->next;
3590 /* Some surgery done on this function, it became ridiculously big.
3592 ** - initializing now in rrd_graph_init()
3593 ** - options parsing now in rrd_graph_options()
3594 ** - script parsing now in rrd_graph_script()
3596 info_t *rrd_graph_v(
3603 rrd_graph_init(&im);
3604 /* a dummy surface so that we can measure text sizes for placements */
3605 im.surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, 10, 10);
3606 im.cr = cairo_create(im.surface);
3607 rrd_graph_options(argc, argv, &im);
3608 if (rrd_test_error()) {
3609 info_free(im.grinfo);
3614 if (optind >= argc) {
3615 info_free(im.grinfo);
3617 rrd_set_error("missing filename");
3621 if (strlen(argv[optind]) >= MAXPATH) {
3622 rrd_set_error("filename (including path) too long");
3623 info_free(im.grinfo);
3628 strncpy(im.graphfile, argv[optind], MAXPATH - 1);
3629 im.graphfile[MAXPATH - 1] = '\0';
3631 if (strcmp(im.graphfile, "-") == 0) {
3632 im.graphfile[0] = '\0';
3635 rrd_graph_script(argc, argv, &im, 1);
3636 if (rrd_test_error()) {
3637 info_free(im.grinfo);
3642 /* Everything is now read and the actual work can start */
3644 if (graph_paint(&im) == -1) {
3645 info_free(im.grinfo);
3651 /* The image is generated and needs to be output.
3652 ** Also, if needed, print a line with information about the image.
3659 sprintf_alloc(im.imginfo,
3662 im.ximg), (long) (im.zoom * im.yimg));
3663 grinfo_push(&im, sprintf_alloc("image_info"), RD_I_STR, info);
3666 if (im.rendered_image) {
3669 img.u_blo.size = im.rendered_image_size;
3670 img.u_blo.ptr = im.rendered_image;
3671 grinfo_push(&im, sprintf_alloc("image"), RD_I_BLO, img);
3678 void rrd_graph_init(
3687 #ifdef HAVE_SETLOCALE
3688 setlocale(LC_TIME, "");
3689 #ifdef HAVE_MBSTOWCS
3690 setlocale(LC_CTYPE, "");
3695 im->draw_x_grid = 1;
3696 im->draw_y_grid = 1;
3697 im->extra_flags = 0;
3698 im->font_options = cairo_font_options_create();
3699 im->forceleftspace = 0;
3702 im->graph_antialias = CAIRO_ANTIALIAS_GRAY;
3703 im->grid_dash_off = 1;
3704 im->grid_dash_on = 1;
3706 im->grinfo = (info_t *) NULL;
3707 im->grinfo_current = (info_t *) NULL;
3708 im->imgformat = IF_PNG;
3711 im->logarithmic = 0;
3717 im->rendered_image_size = 0;
3718 im->rendered_image = NULL;
3723 im->tabwidth = 40.0;
3724 im->title[0] = '\0';
3725 im->unitsexponent = 9999;
3726 im->unitslength = 6;
3727 im->viewfactor = 1.0;
3728 im->watermark[0] = '\0';
3730 im->xlab_user.minsec = -1;
3733 im->ygridstep = DNAN;
3735 im->ylegend[0] = '\0';
3739 cairo_font_options_set_hint_style
3740 (im->font_options, CAIRO_HINT_STYLE_FULL);
3741 cairo_font_options_set_hint_metrics
3742 (im->font_options, CAIRO_HINT_METRICS_ON);
3743 cairo_font_options_set_antialias(im->font_options, CAIRO_ANTIALIAS_GRAY);
3744 for (i = 0; i < DIM(graph_col); i++)
3745 im->graph_col[i] = graph_col[i];
3746 #if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
3749 char rrd_win_default_font[1000];
3751 windir = getenv("windir");
3752 /* %windir% is something like D:\windows or C:\winnt */
3753 if (windir != NULL) {
3754 strncpy(rrd_win_default_font, windir, 500);
3755 rrd_win_default_font[500] = '\0';
3756 strcat(rrd_win_default_font, "\\fonts\\");
3757 strcat(rrd_win_default_font, RRD_DEFAULT_FONT);
3758 for (i = 0; i < DIM(text_prop); i++) {
3759 strncpy(text_prop[i].font,
3760 rrd_win_default_font, sizeof(text_prop[i].font) - 1);
3761 text_prop[i].font[sizeof(text_prop[i].font) - 1] = '\0';
3769 deffont = getenv("RRD_DEFAULT_FONT");
3770 if (deffont != NULL) {
3771 for (i = 0; i < DIM(text_prop); i++) {
3772 strncpy(text_prop[i].font, deffont,
3773 sizeof(text_prop[i].font) - 1);
3774 text_prop[i].font[sizeof(text_prop[i].font) - 1] = '\0';
3778 for (i = 0; i < DIM(text_prop); i++) {
3779 im->text_prop[i].size = text_prop[i].size;
3780 strcpy(im->text_prop[i].font, text_prop[i].font);
3784 void rrd_graph_options(
3791 char *parsetime_error = NULL;
3792 char scan_gtm[12], scan_mtm[12], scan_ltm[12], col_nam[12];
3793 time_t start_tmp = 0, end_tmp = 0;
3795 struct rrd_time_value start_tv, end_tv;
3796 long unsigned int color;
3797 char *old_locale = "";
3799 /* defines for long options without a short equivalent. should be bytes,
3800 and may not collide with (the ASCII value of) short options */
3801 #define LONGOPT_UNITS_SI 255
3802 struct option long_options[] = {
3804 "start", required_argument, 0, 's'}, {
3805 "end", required_argument, 0,
3808 required_argument, 0,
3822 "height", required_argument, 0, 'h'}, {
3823 "full-size-mode", no_argument,
3841 "base", required_argument, 0, 'b'}, {
3842 "logarithmic", no_argument, 0,
3845 required_argument, 0,
3854 "imginfo", required_argument, 0, 'f'}, {
3856 required_argument, 0, 'a'}, {
3862 "zoom", required_argument, 0, 'm'}, {
3863 "no-legend", no_argument, 0,
3865 "force-rules-legend",
3875 "no-minor", no_argument, 0, 'I'}, {
3876 "slope-mode", no_argument, 0,
3879 no_argument, 0, 'A'}, {
3880 "alt-autoscale-min",
3884 "alt-autoscale-max",
3893 "units-exponent", required_argument,
3895 "units-length", required_argument,
3897 "units", required_argument, 0,
3898 LONGOPT_UNITS_SI}, {
3899 "step", required_argument, 0,
3902 required_argument, 0,
3907 "graph-render-mode",
3912 "font-smoothing-threshold",
3913 required_argument, 0, 'B'}, {
3914 "watermark", required_argument, 0, 'W'}, {
3915 "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 */
3920 opterr = 0; /* initialize getopt */
3921 parsetime("end-24h", &start_tv);
3922 parsetime("now", &end_tv);
3924 int option_index = 0;
3926 int col_start, col_end;
3928 opt = getopt_long(argc, argv,
3929 "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:k",
3930 long_options, &option_index);
3935 im->extra_flags |= NOMINOR;
3938 im->extra_flags |= ALTYGRID;
3941 im->extra_flags |= ALTAUTOSCALE;
3944 im->extra_flags |= ALTAUTOSCALE_MIN;
3947 im->extra_flags |= ALTAUTOSCALE_MAX;
3950 im->extra_flags |= ONLY_GRAPH;
3953 im->extra_flags |= NOLEGEND;
3956 im->extra_flags |= FORCE_RULES_LEGEND;
3958 case LONGOPT_UNITS_SI:
3959 if (im->extra_flags & FORCE_UNITS) {
3960 rrd_set_error("--units can only be used once!");
3961 setlocale(LC_NUMERIC, old_locale);
3964 if (strcmp(optarg, "si") == 0)
3965 im->extra_flags |= FORCE_UNITS_SI;
3967 rrd_set_error("invalid argument for --units: %s", optarg);
3972 im->unitsexponent = atoi(optarg);
3975 im->unitslength = atoi(optarg);
3976 im->forceleftspace = 1;
3979 old_locale = setlocale(LC_NUMERIC, "C");
3980 im->tabwidth = atof(optarg);
3981 setlocale(LC_NUMERIC, old_locale);
3984 old_locale = setlocale(LC_NUMERIC, "C");
3985 im->step = atoi(optarg);
3986 setlocale(LC_NUMERIC, old_locale);
3992 if ((parsetime_error = parsetime(optarg, &start_tv))) {
3993 rrd_set_error("start time: %s", parsetime_error);
3998 if ((parsetime_error = parsetime(optarg, &end_tv))) {
3999 rrd_set_error("end time: %s", parsetime_error);
4004 if (strcmp(optarg, "none") == 0) {
4005 im->draw_x_grid = 0;
4009 "%10[A-Z]:%ld:%10[A-Z]:%ld:%10[A-Z]:%ld:%ld:%n",
4011 &im->xlab_user.gridst,
4013 &im->xlab_user.mgridst,
4015 &im->xlab_user.labst,
4016 &im->xlab_user.precis, &stroff) == 7 && stroff != 0) {
4017 strncpy(im->xlab_form, optarg + stroff,
4018 sizeof(im->xlab_form) - 1);
4019 im->xlab_form[sizeof(im->xlab_form) - 1] = '\0';
4021 (im->xlab_user.gridtm = tmt_conv(scan_gtm)) == -1) {
4022 rrd_set_error("unknown keyword %s", scan_gtm);
4025 (im->xlab_user.mgridtm = tmt_conv(scan_mtm))
4027 rrd_set_error("unknown keyword %s", scan_mtm);
4030 (im->xlab_user.labtm = tmt_conv(scan_ltm)) == -1) {
4031 rrd_set_error("unknown keyword %s", scan_ltm);
4034 im->xlab_user.minsec = 1;
4035 im->xlab_user.stst = im->xlab_form;
4037 rrd_set_error("invalid x-grid format");
4043 if (strcmp(optarg, "none") == 0) {
4044 im->draw_y_grid = 0;
4047 old_locale = setlocale(LC_NUMERIC, "C");
4048 if (sscanf(optarg, "%lf:%d", &im->ygridstep, &im->ylabfact) == 2) {
4049 setlocale(LC_NUMERIC, old_locale);
4050 if (im->ygridstep <= 0) {
4051 rrd_set_error("grid step must be > 0");
4053 } else if (im->ylabfact < 1) {
4054 rrd_set_error("label factor must be > 0");
4058 setlocale(LC_NUMERIC, old_locale);
4059 rrd_set_error("invalid y-grid format");
4064 strncpy(im->ylegend, optarg, 150);
4065 im->ylegend[150] = '\0';
4068 old_locale = setlocale(LC_NUMERIC, "C");
4069 im->maxval = atof(optarg);
4070 setlocale(LC_NUMERIC, old_locale);
4073 old_locale = setlocale(LC_NUMERIC, "C");
4074 im->minval = atof(optarg);
4075 setlocale(LC_NUMERIC, old_locale);
4078 im->base = atol(optarg);
4079 if (im->base != 1024 && im->base != 1000) {
4081 ("the only sensible value for base apart from 1000 is 1024");
4086 long_tmp = atol(optarg);
4087 if (long_tmp < 10) {
4088 rrd_set_error("width below 10 pixels");
4091 im->xsize = long_tmp;
4094 long_tmp = atol(optarg);
4095 if (long_tmp < 10) {
4096 rrd_set_error("height below 10 pixels");
4099 im->ysize = long_tmp;
4102 im->extra_flags |= FULL_SIZE_MODE;
4105 /* interlaced png not supported at the moment */
4111 im->imginfo = optarg;
4115 (im->imgformat = if_conv(optarg)) == -1) {
4116 rrd_set_error("unsupported graphics format '%s'", optarg);
4127 im->logarithmic = 1;
4131 "%10[A-Z]#%n%8lx%n",
4132 col_nam, &col_start, &color, &col_end) == 2) {
4134 int col_len = col_end - col_start;
4139 (((color & 0xF00) * 0x110000) | ((color & 0x0F0) *
4147 (((color & 0xF000) *
4148 0x11000) | ((color & 0x0F00) *
4149 0x01100) | ((color &
4152 ((color & 0x000F) * 0x00011)
4156 color = (color << 8) + 0xff /* shift left by 8 */ ;
4161 rrd_set_error("the color format is #RRGGBB[AA]");
4164 if ((ci = grc_conv(col_nam)) != -1) {
4165 im->graph_col[ci] = gfx_hex_to_col(color);
4167 rrd_set_error("invalid color name '%s'", col_nam);
4171 rrd_set_error("invalid color def format");
4180 old_locale = setlocale(LC_NUMERIC, "C");
4181 if (sscanf(optarg, "%10[A-Z]:%lf%n", prop, &size, &end) >= 2) {
4182 int sindex, propidx;
4184 setlocale(LC_NUMERIC, old_locale);
4185 if ((sindex = text_prop_conv(prop)) != -1) {
4186 for (propidx = sindex;
4187 propidx < TEXT_PROP_LAST; propidx++) {
4189 im->text_prop[propidx].size = size;
4191 if ((int) strlen(prop) > end) {
4192 if (prop[end] == ':') {
4193 strncpy(im->text_prop[propidx].font,
4194 prop + end + 1, 255);
4195 im->text_prop[propidx].font[255] = '\0';
4198 ("expected after font size in '%s'",
4203 if (propidx == sindex && sindex != 0)
4207 rrd_set_error("invalid fonttag '%s'", prop);
4211 setlocale(LC_NUMERIC, old_locale);
4212 rrd_set_error("invalid text property format");
4218 old_locale = setlocale(LC_NUMERIC, "C");
4219 im->zoom = atof(optarg);
4220 setlocale(LC_NUMERIC, old_locale);
4221 if (im->zoom <= 0.0) {
4222 rrd_set_error("zoom factor must be > 0");
4227 strncpy(im->title, optarg, 150);
4228 im->title[150] = '\0';
4231 if (strcmp(optarg, "normal") == 0) {
4232 cairo_font_options_set_antialias
4233 (im->font_options, CAIRO_ANTIALIAS_GRAY);
4234 cairo_font_options_set_hint_style
4235 (im->font_options, CAIRO_HINT_STYLE_FULL);
4236 } else if (strcmp(optarg, "light") == 0) {
4237 cairo_font_options_set_antialias
4238 (im->font_options, CAIRO_ANTIALIAS_GRAY);
4239 cairo_font_options_set_hint_style
4240 (im->font_options, CAIRO_HINT_STYLE_SLIGHT);
4241 } else if (strcmp(optarg, "mono") == 0) {
4242 cairo_font_options_set_antialias
4243 (im->font_options, CAIRO_ANTIALIAS_NONE);
4244 cairo_font_options_set_hint_style
4245 (im->font_options, CAIRO_HINT_STYLE_FULL);
4247 rrd_set_error("unknown font-render-mode '%s'", optarg);
4252 if (strcmp(optarg, "normal") == 0)
4253 im->graph_antialias = CAIRO_ANTIALIAS_GRAY;
4254 else if (strcmp(optarg, "mono") == 0)
4255 im->graph_antialias = CAIRO_ANTIALIAS_NONE;
4257 rrd_set_error("unknown graph-render-mode '%s'", optarg);
4262 /* not supported curently */
4265 strncpy(im->watermark, optarg, 100);
4266 im->watermark[99] = '\0';
4270 rrd_set_error("unknown option '%c'", optopt);
4272 rrd_set_error("unknown option '%s'", argv[optind - 1]);
4277 if (im->logarithmic && im->minval <= 0) {
4279 ("for a logarithmic yaxis you must specify a lower-limit > 0");
4283 if (proc_start_end(&start_tv, &end_tv, &start_tmp, &end_tmp) == -1) {
4284 /* error string is set in parsetime.c */
4288 if (start_tmp < 3600 * 24 * 365 * 10) {
4290 ("the first entry to fetch should be after 1980 (%ld)",
4295 if (end_tmp < start_tmp) {
4297 ("start (%ld) should be less than end (%ld)", start_tmp, end_tmp);
4301 im->start = start_tmp;
4303 im->step = max((long) im->step, (im->end - im->start) / im->xsize);
4306 int rrd_graph_color(
4314 graph_desc_t *gdp = &im->gdes[im->gdes_c - 1];
4316 color = strstr(var, "#");
4317 if (color == NULL) {
4318 if (optional == 0) {
4319 rrd_set_error("Found no color in %s", err);
4326 long unsigned int col;
4328 rest = strstr(color, ":");
4335 sscanf(color, "#%6lx%n", &col, &n);
4336 col = (col << 8) + 0xff /* shift left by 8 */ ;
4338 rrd_set_error("Color problem in %s", err);
4341 sscanf(color, "#%8lx%n", &col, &n);
4345 rrd_set_error("Color problem in %s", err);
4347 if (rrd_test_error())
4349 gdp->col = gfx_hex_to_col(col);
4362 while (*ptr != '\0')
4363 if (*ptr++ == '%') {
4365 /* line cannot end with percent char */
4368 /* '%s', '%S' and '%%' are allowed */
4369 if (*ptr == 's' || *ptr == 'S' || *ptr == '%')
4371 /* %c is allowed (but use only with vdef!) */
4372 else if (*ptr == 'c') {
4377 /* or else '% 6.2lf' and such are allowed */
4379 /* optional padding character */
4380 if (*ptr == ' ' || *ptr == '+' || *ptr == '-')
4382 /* This should take care of 'm.n' with all three optional */
4383 while (*ptr >= '0' && *ptr <= '9')
4387 while (*ptr >= '0' && *ptr <= '9')
4389 /* Either 'le', 'lf' or 'lg' must follow here */
4392 if (*ptr == 'e' || *ptr == 'f' || *ptr == 'g')
4407 const char *const str)
4409 /* A VDEF currently is either "func" or "param,func"
4410 * so the parsing is rather simple. Change if needed.
4418 old_locale = setlocale(LC_NUMERIC, "C");
4419 sscanf(str, "%le,%29[A-Z]%n", ¶m, func, &n);
4420 setlocale(LC_NUMERIC, old_locale);
4421 if (n == (int) strlen(str)) { /* matched */
4425 sscanf(str, "%29[A-Z]%n", func, &n);
4426 if (n == (int) strlen(str)) { /* matched */
4430 ("Unknown function string '%s' in VDEF '%s'",
4435 if (!strcmp("PERCENT", func))
4436 gdes->vf.op = VDEF_PERCENT;
4437 else if (!strcmp("MAXIMUM", func))
4438 gdes->vf.op = VDEF_MAXIMUM;
4439 else if (!strcmp("AVERAGE", func))
4440 gdes->vf.op = VDEF_AVERAGE;
4441 else if (!strcmp("STDEV", func))
4442 gdes->vf.op = VDEF_STDEV;
4443 else if (!strcmp("MINIMUM", func))
4444 gdes->vf.op = VDEF_MINIMUM;
4445 else if (!strcmp("TOTAL", func))
4446 gdes->vf.op = VDEF_TOTAL;
4447 else if (!strcmp("FIRST", func))
4448 gdes->vf.op = VDEF_FIRST;
4449 else if (!strcmp("LAST", func))
4450 gdes->vf.op = VDEF_LAST;
4451 else if (!strcmp("LSLSLOPE", func))
4452 gdes->vf.op = VDEF_LSLSLOPE;
4453 else if (!strcmp("LSLINT", func))
4454 gdes->vf.op = VDEF_LSLINT;
4455 else if (!strcmp("LSLCORREL", func))
4456 gdes->vf.op = VDEF_LSLCORREL;
4459 ("Unknown function '%s' in VDEF '%s'\n", func, gdes->vname);
4462 switch (gdes->vf.op) {
4464 if (isnan(param)) { /* no parameter given */
4466 ("Function '%s' needs parameter in VDEF '%s'\n",
4470 if (param >= 0.0 && param <= 100.0) {
4471 gdes->vf.param = param;
4472 gdes->vf.val = DNAN; /* undefined */
4473 gdes->vf.when = 0; /* undefined */
4476 ("Parameter '%f' out of range in VDEF '%s'\n",
4477 param, gdes->vname);
4490 case VDEF_LSLCORREL:
4492 gdes->vf.param = DNAN;
4493 gdes->vf.val = DNAN;
4497 ("Function '%s' needs no parameter in VDEF '%s'\n",
4511 graph_desc_t *src, *dst;
4515 dst = &im->gdes[gdi];
4516 src = &im->gdes[dst->vidx];
4517 data = src->data + src->ds;
4518 steps = (src->end - src->start) / src->step;
4521 ("DEBUG: start == %lu, end == %lu, %lu steps\n",
4522 src->start, src->end, steps);
4524 switch (dst->vf.op) {
4528 if ((array = malloc(steps * sizeof(double))) == NULL) {
4529 rrd_set_error("malloc VDEV_PERCENT");
4532 for (step = 0; step < steps; step++) {
4533 array[step] = data[step * src->ds_cnt];
4535 qsort(array, step, sizeof(double), vdef_percent_compar);
4536 field = (steps - 1) * dst->vf.param / 100;
4537 dst->vf.val = array[field];
4538 dst->vf.when = 0; /* no time component */
4541 for (step = 0; step < steps; step++)
4542 printf("DEBUG: %3li:%10.2f %c\n",
4543 step, array[step], step == field ? '*' : ' ');
4549 while (step != steps && isnan(data[step * src->ds_cnt]))
4551 if (step == steps) {
4555 dst->vf.val = data[step * src->ds_cnt];
4556 dst->vf.when = src->start + (step + 1) * src->step;
4558 while (step != steps) {
4559 if (finite(data[step * src->ds_cnt])) {
4560 if (data[step * src->ds_cnt] > dst->vf.val) {
4561 dst->vf.val = data[step * src->ds_cnt];
4562 dst->vf.when = src->start + (step + 1) * src->step;
4573 double average = 0.0;
4575 for (step = 0; step < steps; step++) {
4576 if (finite(data[step * src->ds_cnt])) {
4577 sum += data[step * src->ds_cnt];
4582 if (dst->vf.op == VDEF_TOTAL) {
4583 dst->vf.val = sum * src->step;
4584 dst->vf.when = 0; /* no time component */
4585 } else if (dst->vf.op == VDEF_AVERAGE) {
4586 dst->vf.val = sum / cnt;
4587 dst->vf.when = 0; /* no time component */
4589 average = sum / cnt;
4591 for (step = 0; step < steps; step++) {
4592 if (finite(data[step * src->ds_cnt])) {
4593 sum += pow((data[step * src->ds_cnt] - average), 2.0);
4596 dst->vf.val = pow(sum / cnt, 0.5);
4597 dst->vf.when = 0; /* no time component */
4607 while (step != steps && isnan(data[step * src->ds_cnt]))
4609 if (step == steps) {
4613 dst->vf.val = data[step * src->ds_cnt];
4614 dst->vf.when = src->start + (step + 1) * src->step;
4616 while (step != steps) {
4617 if (finite(data[step * src->ds_cnt])) {
4618 if (data[step * src->ds_cnt] < dst->vf.val) {
4619 dst->vf.val = data[step * src->ds_cnt];
4620 dst->vf.when = src->start + (step + 1) * src->step;
4627 /* The time value returned here is one step before the
4628 * actual time value. This is the start of the first
4632 while (step != steps && isnan(data[step * src->ds_cnt]))
4634 if (step == steps) { /* all entries were NaN */
4638 dst->vf.val = data[step * src->ds_cnt];
4639 dst->vf.when = src->start + step * src->step;
4643 /* The time value returned here is the
4644 * actual time value. This is the end of the last
4648 while (step >= 0 && isnan(data[step * src->ds_cnt]))
4650 if (step < 0) { /* all entries were NaN */
4654 dst->vf.val = data[step * src->ds_cnt];
4655 dst->vf.when = src->start + (step + 1) * src->step;
4660 case VDEF_LSLCORREL:{
4661 /* Bestfit line by linear least squares method */
4664 double SUMx, SUMy, SUMxy, SUMxx, SUMyy, slope, y_intercept, correl;
4671 for (step = 0; step < steps; step++) {
4672 if (finite(data[step * src->ds_cnt])) {
4675 SUMxx += step * step;
4676 SUMxy += step * data[step * src->ds_cnt];
4677 SUMy += data[step * src->ds_cnt];
4678 SUMyy += data[step * src->ds_cnt] * data[step * src->ds_cnt];
4682 slope = (SUMx * SUMy - cnt * SUMxy) / (SUMx * SUMx - cnt * SUMxx);
4683 y_intercept = (SUMy - slope * SUMx) / cnt;
4686 (SUMx * SUMy) / cnt) /
4688 (SUMx * SUMx) / cnt) * (SUMyy - (SUMy * SUMy) / cnt));
4690 if (dst->vf.op == VDEF_LSLSLOPE) {
4691 dst->vf.val = slope;
4693 } else if (dst->vf.op == VDEF_LSLINT) {
4694 dst->vf.val = y_intercept;
4696 } else if (dst->vf.op == VDEF_LSLCORREL) {
4697 dst->vf.val = correl;
4710 /* NaN < -INF < finite_values < INF */
4711 int vdef_percent_compar(
4717 /* Equality is not returned; this doesn't hurt except
4718 * (maybe) for a little performance.
4721 /* First catch NaN values. They are smallest */
4722 if (isnan(*(double *) a))
4724 if (isnan(*(double *) b))
4726 /* NaN doesn't reach this part so INF and -INF are extremes.
4727 * The sign from isinf() is compatible with the sign we return
4729 if (isinf(*(double *) a))
4730 return isinf(*(double *) a);
4731 if (isinf(*(double *) b))
4732 return isinf(*(double *) b);
4733 /* If we reach this, both values must be finite */
4734 if (*(double *) a < *(double *) b)
4743 enum info_type type,
4746 im->grinfo_current = info_push(im->grinfo_current, key, type, value);
4747 if (im->grinfo == NULL) {
4748 im->grinfo = im->grinfo_current;