1 /****************************************************************************
2 * RRDtool 1.3rc4 Copyright by Tobi Oetiker, 1997-2008
3 ****************************************************************************
4 * rrd__graph.c produce graphs from data in rrdfiles
5 ****************************************************************************/
8 #include <sys/stat.h>
10 #ifdef WIN32
11 #include "strftime.h"
12 #endif
13 #include "rrd_tool.h"
15 #if defined(WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
16 #include <io.h>
17 #include <fcntl.h>
18 #endif
20 #ifdef HAVE_TIME_H
21 #include <time.h>
22 #endif
24 #ifdef HAVE_LOCALE_H
25 #include <locale.h>
26 #endif
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"
37 #endif
39 text_prop_t text_prop[] = {
40 {8.0, RRD_DEFAULT_FONT}
41 , /* default */
42 {9.0, RRD_DEFAULT_FONT}
43 , /* title */
44 {7.0, RRD_DEFAULT_FONT}
45 , /* axis */
46 {8.0, RRD_DEFAULT_FONT}
47 , /* unit */
48 {8.0, RRD_DEFAULT_FONT} /* legend */
49 };
51 xlab_t xlab[] = {
52 {0, 0, TMT_SECOND, 30, TMT_MINUTE, 5, TMT_MINUTE, 5, 0, "%H:%M"}
53 ,
54 {2, 0, TMT_MINUTE, 1, TMT_MINUTE, 5, TMT_MINUTE, 5, 0, "%H:%M"}
55 ,
56 {5, 0, TMT_MINUTE, 2, TMT_MINUTE, 10, TMT_MINUTE, 10, 0, "%H:%M"}
57 ,
58 {10, 0, TMT_MINUTE, 5, TMT_MINUTE, 20, TMT_MINUTE, 20, 0, "%H:%M"}
59 ,
60 {30, 0, TMT_MINUTE, 10, TMT_HOUR, 1, TMT_HOUR, 1, 0, "%H:%M"}
61 ,
62 {60, 0, TMT_MINUTE, 30, TMT_HOUR, 2, TMT_HOUR, 2, 0, "%H:%M"}
63 ,
64 {60, 24 * 3600, TMT_MINUTE, 30, TMT_HOUR, 2, TMT_HOUR, 6, 0, "%a %H:%M"}
65 ,
66 {180, 0, TMT_HOUR, 1, TMT_HOUR, 6, TMT_HOUR, 6, 0, "%H:%M"}
67 ,
68 {180, 24 * 3600, TMT_HOUR, 1, TMT_HOUR, 6, TMT_HOUR, 12, 0, "%a %H:%M"}
69 ,
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"}
72 ,
73 {1200, 0, TMT_HOUR, 6, TMT_DAY, 1, TMT_DAY, 1, 24 * 3600, "%d"}
74 ,
75 {1800, 0, TMT_HOUR, 12, TMT_DAY, 1, TMT_DAY, 2, 24 * 3600, "%a %d"}
76 ,
77 {2400, 0, TMT_HOUR, 12, TMT_DAY, 1, TMT_DAY, 2, 24 * 3600, "%a"}
78 ,
79 {3600, 0, TMT_DAY, 1, TMT_WEEK, 1, TMT_WEEK, 1, 7 * 24 * 3600, "Week %V"}
80 ,
81 {3 * 3600, 0, TMT_WEEK, 1, TMT_MONTH, 1, TMT_WEEK, 2, 7 * 24 * 3600,
82 "Week %V"}
83 ,
84 {6 * 3600, 0, TMT_MONTH, 1, TMT_MONTH, 1, TMT_MONTH, 1, 30 * 24 * 3600,
85 "%b"}
86 ,
87 {48 * 3600, 0, TMT_MONTH, 1, TMT_MONTH, 3, TMT_MONTH, 3, 30 * 24 * 3600,
88 "%b"}
89 ,
90 {315360, 0, TMT_MONTH, 3, TMT_YEAR, 1, TMT_YEAR, 1, 365 * 24 * 3600, "%Y"}
91 ,
92 {10 * 24 * 3600, 0, TMT_YEAR, 1, TMT_YEAR, 1, TMT_YEAR, 1,
93 365 * 24 * 3600, "%y"}
94 ,
95 {-1, 0, TMT_MONTH, 0, TMT_MONTH, 0, TMT_MONTH, 0, 0, ""}
96 };
98 /* sensible y label intervals ...*/
100 ylab_t ylab[] = {
101 {0.1, {1, 2, 5, 10}
102 }
103 ,
104 {0.2, {1, 5, 10, 20}
105 }
106 ,
107 {0.5, {1, 2, 4, 10}
108 }
109 ,
110 {1.0, {1, 2, 5, 10}
111 }
112 ,
113 {2.0, {1, 5, 10, 20}
114 }
115 ,
116 {5.0, {1, 2, 4, 10}
117 }
118 ,
119 {10.0, {1, 2, 5, 10}
120 }
121 ,
122 {20.0, {1, 5, 10, 20}
123 }
124 ,
125 {50.0, {1, 2, 4, 10}
126 }
127 ,
128 {100.0, {1, 2, 5, 10}
129 }
130 ,
131 {200.0, {1, 5, 10, 20}
132 }
133 ,
134 {500.0, {1, 2, 4, 10}
135 }
136 ,
137 {0.0, {0, 0, 0, 0}
138 }
139 };
142 gfx_color_t graph_col[] = /* default colors */
143 {
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 */
154 };
157 /* #define DEBUG */
159 #ifdef DEBUG
160 # define DPRINT(x) (void)(printf x, printf("\n"))
161 #else
162 # define DPRINT(x)
163 #endif
166 /* initialize with xtr(im,0); */
167 int xtr(
168 image_desc_t *im,
169 time_t mytime)
170 {
171 static double pixie;
173 if (mytime == 0) {
174 pixie = (double) im->xsize / (double) (im->end - im->start);
175 return im->xorigin;
176 }
177 return (int) ((double) im->xorigin + pixie * (mytime - im->start));
178 }
180 /* translate data values into y coordinates */
181 double ytr(
182 image_desc_t *im,
183 double value)
184 {
185 static double pixie;
186 double yval;
188 if (isnan(value)) {
189 if (!im->logarithmic)
190 pixie = (double) im->ysize / (im->maxval - im->minval);
191 else
192 pixie =
193 (double) im->ysize / (log10(im->maxval) - log10(im->minval));
194 yval = im->yorigin;
195 } else if (!im->logarithmic) {
196 yval = im->yorigin - pixie * (value - im->minval);
197 } else {
198 if (value < im->minval) {
199 yval = im->yorigin;
200 } else {
201 yval = im->yorigin - pixie * (log10(value) - log10(im->minval));
202 }
203 }
204 return yval;
205 }
209 /* conversion function for symbolic entry names */
212 #define conv_if(VV,VVV) \
213 if (strcmp(#VV, string) == 0) return VVV ;
215 enum gf_en gf_conv(
216 char *string)
217 {
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);
235 return (-1);
236 }
238 enum gfx_if_en if_conv(
239 char *string)
240 {
242 conv_if(PNG, IF_PNG);
243 conv_if(SVG, IF_SVG);
244 conv_if(EPS, IF_EPS);
245 conv_if(PDF, IF_PDF);
247 return (-1);
248 }
250 enum tmt_en tmt_conv(
251 char *string)
252 {
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);
261 return (-1);
262 }
264 enum grc_en grc_conv(
265 char *string)
266 {
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);
279 return -1;
280 }
282 enum text_prop_en text_prop_conv(
283 char *string)
284 {
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);
291 return -1;
292 }
295 #undef conv_if
297 int im_free(
298 image_desc_t *im)
299 {
300 unsigned long i, ii;
301 cairo_status_t status = 0;
303 if (im == NULL)
304 return 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);
313 }
314 }
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);
321 }
322 free(im->gdes);
323 if (im->font_options)
324 cairo_font_options_destroy(im->font_options);
326 if (im->cr) {
327 status = cairo_status(im->cr);
328 cairo_destroy(im->cr);
329 }
330 if (im->rendered_image) {
331 free(im->rendered_image);
332 }
333 if (im->surface)
334 cairo_surface_destroy(im->surface);
335 if (status)
336 fprintf(stderr, "OOPS: Cairo has issues it can't even die: %s\n",
337 cairo_status_to_string(status));
339 return 0;
340 }
342 /* find SI magnitude symbol for the given number*/
343 void auto_scale(
344 image_desc_t *im, /* image description */
345 double *value,
346 char **symb_ptr,
347 double *magfact)
348 {
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 */
356 " ", /* Base */
357 "k", /* 10e3 Kilo */
358 "M", /* 10e6 Mega */
359 "G", /* 10e9 Giga */
360 "T", /* 10e12 Tera */
361 "P", /* 10e15 Peta */
362 "E"
363 }; /* 10e18 Exa */
365 int symbcenter = 6;
366 int sindex;
368 if (*value == 0.0 || isnan(*value)) {
369 sindex = 0;
370 *magfact = 1.0;
371 } else {
372 sindex = floor(log(fabs(*value)) / log((double) im->base));
373 *magfact = pow((double) im->base, (double) sindex);
374 (*value) /= (*magfact);
375 }
376 if (sindex <= symbcenter && sindex >= -symbcenter) {
377 (*symb_ptr) = symbol[sindex + symbcenter];
378 } else {
379 (*symb_ptr) = "?";
380 }
381 }
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 */
391 ' ', /* Base */
392 'k', /* 10e3 Kilo */
393 'M', /* 10e6 Mega */
394 'G', /* 10e9 Giga */
395 'T', /* 10e12 Tera */
396 'P', /* 10e15 Peta */
397 'E', /* 10e18 Exa */
398 };
399 static const int si_symbcenter = 6;
401 /* find SI magnitude symbol for the numbers on the y-axis*/
402 void si_unit(
403 image_desc_t *im /* image description */
404 )
405 {
407 double digits, viewdigits = 0;
409 digits =
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);
416 } else {
417 viewdigits = digits;
418 }
420 im->magfact = pow((double) im->base, digits);
422 #ifdef DEBUG
423 printf("digits %6.3f im->magfact %6.3f\n", digits, im->magfact);
424 #endif
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];
431 else
432 im->symbol = '?';
433 }
435 /* move min and max values around to become sensible */
437 void expand_range(
438 image_desc_t *im)
439 {
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
448 };
450 double scaled_min, scaled_max;
451 double adj;
452 int i;
456 #ifdef DEBUG
457 printf("Min: %6.2f Max: %6.2f MagFactor: %6.2f\n",
458 im->minval, im->maxval, im->magfact);
459 #endif
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 */
466 double delt, fact;
468 delt = im->maxval - im->minval;
469 adj = delt * 0.1;
470 fact = 2.0 * pow(10.0,
471 floor(log10
472 (max(fabs(im->minval), fabs(im->maxval)) /
473 im->magfact)) - 2);
474 if (delt < fact) {
475 adj = (fact - delt) * 0.55;
476 #ifdef DEBUG
477 printf
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);
480 #endif
481 }
482 im->minval -= adj;
483 im->maxval += 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;
489 im->minval -= adj;
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;
495 im->maxval += adj;
496 } else {
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);
516 }
517 }
518 } else {
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));
524 }
526 #ifdef DEBUG
527 fprintf(stderr, "SCALED Min: %6.2f Max: %6.2f Factor: %6.2f\n",
528 im->minval, im->maxval, im->magfact);
529 #endif
530 }
533 void apply_gridfit(
534 image_desc_t *im)
535 {
536 if (isnan(im->minval) || isnan(im->maxval))
537 return;
538 ytr(im, DNAN);
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)
545 ya *= 10;
546 if (ya > im->maxval)
547 return; /* don't have y=10^x gridline */
548 yb = ya * 10;
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);
561 }
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 */
573 }
574 } else {
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;
587 else
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)
593 minor_y += gridstep;
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 */
603 }
604 calc_horizontal_grid(im); /* recalc with changed im->maxval */
605 }
606 }
608 /* reduce data reimplementation by Alex */
610 void reduce_data(
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 */
617 rrd_value_t **data)
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 =
621 0;
622 rrd_value_t *srcptr, *dstptr;
624 (*step) = cur_step * reduce_factor; /* set new step size for reduced data */
625 dstptr = *data;
626 srcptr = *data;
627 row_cnt = ((*end) - (*start)) / cur_step;
629 #ifdef DEBUG
630 #define DEBUG_REDUCE
631 #endif
632 #ifdef DEBUG_REDUCE
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]);
639 printf("\n");
640 }
641 #endif
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.
650 */
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).
659 */
660 #ifdef DEBUG_REDUCE
661 printf("start_offset: %lu end_offset: %lu\n", start_offset, end_offset);
662 printf("row_cnt before: %lu\n", row_cnt);
663 #endif
664 if (start_offset) {
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++)
669 *dstptr++ = DNAN;
670 row_cnt -= skiprows;
671 }
672 #ifdef DEBUG_REDUCE
673 printf("row_cnt between: %lu\n", row_cnt);
674 #endif
676 /* At the end we have some rows that are not going to be
677 ** used, the amount is end_offset/cur_step
678 */
679 if (end_offset) {
680 (*end) = (*end) - end_offset + (*step);
681 skiprows = end_offset / cur_step;
682 row_cnt -= skiprows;
683 }
684 #ifdef DEBUG_REDUCE
685 printf("row_cnt after: %lu\n", row_cnt);
686 #endif
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");
695 exit(1);
696 }
698 /* Now combine reduce_factor intervals at a time
699 ** into one interval for the destination.
700 */
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])) {
709 continue;
710 }
711 validval++;
712 if (isnan(newval))
713 newval = srcptr[i * (*ds_cnt) + col];
714 else {
715 switch (cf) {
716 case CF_HWPREDICT:
717 case CF_MHWPREDICT:
718 case CF_DEVSEASONAL:
719 case CF_DEVPREDICT:
720 case CF_SEASONAL:
721 case CF_AVERAGE:
722 newval += srcptr[i * (*ds_cnt) + col];
723 break;
724 case CF_MINIMUM:
725 newval = min(newval, srcptr[i * (*ds_cnt) + col]);
726 break;
727 case CF_FAILURES:
728 /* an interval contains a failure if any subintervals contained a failure */
729 case CF_MAXIMUM:
730 newval = max(newval, srcptr[i * (*ds_cnt) + col]);
731 break;
732 case CF_LAST:
733 newval = srcptr[i * (*ds_cnt) + col];
734 break;
735 }
736 }
737 }
738 if (validval == 0) {
739 newval = DNAN;
740 } else {
741 switch (cf) {
742 case CF_HWPREDICT:
743 case CF_MHWPREDICT:
744 case CF_DEVSEASONAL:
745 case CF_DEVPREDICT:
746 case CF_SEASONAL:
747 case CF_AVERAGE:
748 newval /= validval;
749 break;
750 case CF_MINIMUM:
751 case CF_FAILURES:
752 case CF_MAXIMUM:
753 case CF_LAST:
754 break;
755 }
756 }
757 *dstptr++ = newval;
758 }
759 srcptr += (*ds_cnt) * reduce_factor;
760 row_cnt -= reduce_factor;
761 }
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.
764 */
765 if (end_offset)
766 for (col = 0; col < (*ds_cnt); col++)
767 *dstptr++ = DNAN;
768 #ifdef DEBUG_REDUCE
769 row_cnt = ((*end) - (*start)) / *step;
770 srcptr = *data;
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]);
777 printf("\n");
778 }
779 #endif
780 }
783 /* get the data required for the graphs from the
784 relevant rrds ... */
786 int data_fetch(
787 image_desc_t *im)
788 {
789 int i, ii;
790 int skip;
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)
796 continue;
798 skip = 0;
799 /* do we have it already ? */
800 for (ii = 0; ii < i; ii++) {
801 if (im->gdes[ii].gf != GF_DEF)
802 continue;
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
811 */
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;
819 skip = 1;
820 }
821 if (skip)
822 break;
823 }
824 if (!skip) {
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,
828 im->gdes[i].cf,
829 &im->gdes[i].start,
830 &im->gdes[i].end,
831 &ft_step,
832 &im->gdes[i].ds_cnt,
833 &im->gdes[i].ds_namv,
834 &im->gdes[i].data)) == -1) {
835 return -1;
836 }
837 im->gdes[i].data_first = 1;
839 if (ft_step < im->gdes[i].step) {
840 reduce_data(im->gdes[i].cf_reduce,
841 ft_step,
842 &im->gdes[i].start,
843 &im->gdes[i].end,
844 &im->gdes[i].step,
845 &im->gdes[i].ds_cnt, &im->gdes[i].data);
846 } else {
847 im->gdes[i].step = ft_step;
848 }
849 }
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) {
854 im->gdes[i].ds = ii;
855 }
856 }
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);
860 return -1;
861 }
863 }
864 return 0;
865 }
867 /* evaluate the expressions in the CDEF functions */
869 /*************************************************************
870 * CDEF stuff
871 *************************************************************/
873 long find_var_wrapper(
874 void *arg1,
875 char *key)
876 {
877 return find_var((image_desc_t *) arg1, key);
878 }
880 /* find gdes containing var*/
881 long find_var(
882 image_desc_t *im,
883 char *key)
884 {
885 long ii;
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)) {
891 return ii;
892 }
893 }
894 return -1;
895 }
897 /* find the largest common denominator for all the numbers
898 in the 0 terminated num array */
899 long lcd(
900 long *num)
901 {
902 long rest;
903 int i;
905 for (i = 0; num[i + 1] != 0; i++) {
906 do {
907 rest = num[i] % num[i + 1];
908 num[i] = num[i + 1];
909 num[i + 1] = rest;
910 } while (rest != 0);
911 num[i + 1] = num[i];
912 }
913 /* return i==0?num[i]:num[i-1]; */
914 return num[i];
915 }
917 /* run the rpn calculator on all the VDEF and CDEF arguments */
918 int data_calc(
919 image_desc_t *im)
920 {
922 int gdi;
923 int dataidx;
924 long *steparray, rpi;
925 int stepcnt;
926 time_t now;
927 rpnstack_t rpnstack;
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
934 */
935 switch (im->gdes[gdi].gf) {
936 case GF_XPORT:
937 break;
938 case GF_SHIFT:{
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;
945 /* vdef */
946 if (im->gdes[gdi].shidx >= 0)
947 vdp->shift = im->gdes[im->gdes[gdi].shidx].vf.val;
948 /* constant */
949 else
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;
955 /* apply shift */
956 vdp->start += vdp->shift;
957 vdp->end += vdp->shift;
958 break;
959 }
960 case GF_VDEF:
961 /* A VDEF has no DS. This also signals other parts
962 * of rrdtool that this is a VDEF value, not a CDEF.
963 */
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);
969 return -1;
970 }
971 break;
972 case GF_CDEF:
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;
978 steparray = NULL;
979 stepcnt = 0;
980 dataidx = -1;
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.
990 */
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 */
997 #if 0
998 printf
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);
1003 #endif
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. */
1010 if ((steparray =
1011 rrd_realloc(steparray,
1012 (++stepcnt +
1013 1) * sizeof(*steparray))) == NULL) {
1014 rrd_set_error("realloc steparray");
1015 rpnstack_free(&rpnstack);
1016 return -1;
1017 };
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)
1025 */
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
1037 * count of this rra
1038 */
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
1047 */
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;
1057 long diff =
1058 im->gdes[gdi].start - im->gdes[ptr].start;
1060 if (diff > 0)
1061 im->gdes[gdi].rpnp[rpi].data +=
1062 (diff / im->gdes[ptr].step) *
1063 im->gdes[ptr].ds_cnt;
1064 }
1065 }
1067 if (steparray == NULL) {
1068 rrd_set_error("rpn expressions without DEF"
1069 " or CDEF variables are not supported");
1070 rpnstack_free(&rpnstack);
1071 return -1;
1072 }
1073 steparray[stepcnt] = 0;
1074 /* Now find the resulting step. All steps in all
1075 * used RRAs have to be visited
1076 */
1077 im->gdes[gdi].step = lcd(steparray);
1078 free(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);
1085 return -1;
1086 }
1088 /* Step through the new cdef results array and
1089 * calculate the values
1090 */
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
1098 */
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);
1103 return -1;
1104 }
1105 } /* enumerate over time steps within a CDEF */
1106 break;
1107 default:
1108 continue;
1109 }
1110 } /* enumerate over CDEFs */
1111 rpnstack_free(&rpnstack);
1112 return 0;
1113 }
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(
1120 float A,
1121 float B,
1122 int maxUlps)
1123 {
1125 int aInt = *(int *) &A;
1126 int bInt = *(int *) &B;
1127 int intDiff;
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 */
1136 if (aInt < 0)
1137 aInt = 0x80000000l - aInt;
1139 /* Make bInt lexicographically ordered as a twos-complement int */
1141 if (bInt < 0)
1142 bInt = 0x80000000l - bInt;
1144 intDiff = abs(aInt - bInt);
1146 if (intDiff <= maxUlps)
1147 return 1;
1149 return 0;
1150 }
1152 /* massage data so, that we get one value for each x coordinate in the graph */
1153 int data_proc(
1154 image_desc_t *im)
1155 {
1156 long i, ii;
1157 double pixstep = (double) (im->end - im->start)
1158 / (double) im->xsize; /* how much time
1159 passes in one pixel */
1160 double paintval;
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");
1172 return -1;
1173 }
1174 }
1175 }
1177 for (i = 0; i < im->xsize; i++) { /* for each pixel */
1178 long vidx;
1180 gr_time = im->start + pixstep * i; /* time of the current step */
1181 paintval = 0.0;
1183 for (ii = 0; ii < im->gdes_c; ii++) {
1184 double value;
1186 switch (im->gdes[ii].gf) {
1187 case GF_LINE:
1188 case GF_AREA:
1189 case GF_TICK:
1190 if (!im->gdes[ii].stack)
1191 paintval = 0.0;
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.
1196 */
1197 vidx = im->gdes[ii].vidx;
1198 if (im->gdes[vidx].gf == GF_VDEF) {
1199 value = im->gdes[vidx].vf.val;
1200 } else
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)
1206 floor((double)
1207 (gr_time -
1208 im->gdes[vidx].
1209 start)
1210 /
1211 im->gdes[vidx].step)
1212 * im->gdes[vidx].ds_cnt +
1213 im->gdes[vidx].ds];
1214 } else {
1215 value = DNAN;
1216 }
1217 };
1219 if (!isnan(value)) {
1220 paintval += value;
1221 im->gdes[ii].p_data[i] = paintval;
1222 /* GF_TICK: the data values are not
1223 ** relevant for min and max
1224 */
1225 if (finite(paintval) && im->gdes[ii].gf != GF_TICK) {
1226 if ((isnan(minval) || paintval < minval) &&
1227 !(im->logarithmic && paintval <= 0.0))
1228 minval = paintval;
1229 if (isnan(maxval) || paintval > maxval)
1230 maxval = paintval;
1231 }
1232 } else {
1233 im->gdes[ii].p_data[i] = DNAN;
1234 }
1235 break;
1236 case GF_STACK:
1237 rrd_set_error
1238 ("STACK should already be turned into LINE or AREA here");
1239 return -1;
1240 break;
1241 default:
1242 break;
1243 }
1244 }
1245 }
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 */
1254 maxval = 5.1;
1255 }
1256 /* in logarithm mode, where minval is smaller or equal
1257 to 0 make the beast just way smaller than maxval */
1258 if (minval <= 0) {
1259 minval = maxval / 10e8;
1260 }
1261 } else {
1262 if (isnan(minval) || isnan(maxval)) {
1263 minval = 0.0;
1264 maxval = 1.0;
1265 }
1266 }
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)
1272 ) {
1273 if (im->logarithmic)
1274 im->minval = minval / 2.0;
1275 else
1276 im->minval = minval;
1277 }
1278 if (isnan(im->maxval)
1279 || (!im->rigid && im->maxval < maxval)
1280 ) {
1281 if (im->logarithmic)
1282 im->maxval = maxval * 2.0;
1283 else
1284 im->maxval = maxval;
1285 }
1287 /* make sure min is smaller than max */
1288 if (im->minval > im->maxval) {
1289 if (im->minval > 0)
1290 im->minval = 0.99 * im->maxval;
1291 else
1292 im->minval = 1.01 * im->maxval;
1293 }
1295 /* make sure min and max are not equal */
1296 if (AlmostEqual2sComplement(im->minval, im->maxval, 4)) {
1297 if (im->maxval > 0)
1298 im->maxval *= 1.01;
1299 else
1300 im->maxval *= 0.99;
1302 /* make sure min and max are not both zero */
1303 if (AlmostEqual2sComplement(im->maxval, 0, 4)) {
1304 im->maxval = 1.0;
1305 }
1306 }
1307 return 0;
1308 }
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 */
1318 )
1319 {
1320 struct tm tm;
1322 localtime_r(&start, &tm);
1324 switch (baseint) {
1325 case TMT_SECOND:
1326 tm. tm_sec -= tm.tm_sec % basestep;
1328 break;
1329 case TMT_MINUTE:
1330 tm. tm_sec = 0;
1331 tm. tm_min -= tm.tm_min % basestep;
1333 break;
1334 case TMT_HOUR:
1335 tm. tm_sec = 0;
1336 tm. tm_min = 0;
1337 tm. tm_hour -= tm.tm_hour % basestep;
1339 break;
1340 case TMT_DAY:
1341 /* we do NOT look at the basestep for this ... */
1342 tm. tm_sec = 0;
1343 tm. tm_min = 0;
1344 tm. tm_hour = 0;
1346 break;
1347 case TMT_WEEK:
1348 /* we do NOT look at the basestep for this ... */
1349 tm. tm_sec = 0;
1350 tm. tm_min = 0;
1351 tm. tm_hour = 0;
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 */
1357 break;
1358 case TMT_MONTH:
1359 tm. tm_sec = 0;
1360 tm. tm_min = 0;
1361 tm. tm_hour = 0;
1362 tm. tm_mday = 1;
1363 tm. tm_mon -= tm.tm_mon % basestep;
1365 break;
1367 case TMT_YEAR:
1368 tm. tm_sec = 0;
1369 tm. tm_min = 0;
1370 tm. tm_hour = 0;
1371 tm. tm_mday = 1;
1372 tm. tm_mon = 0;
1373 tm. tm_year -= (
1374 tm.tm_year + 1900) %basestep;
1376 }
1377 return mktime(&tm);
1378 }
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 */
1385 )
1386 {
1387 struct tm tm;
1388 time_t madetime;
1390 localtime_r(¤t, &tm);
1392 do {
1393 switch (baseint) {
1394 case TMT_SECOND:
1395 tm. tm_sec += basestep;
1397 break;
1398 case TMT_MINUTE:
1399 tm. tm_min += basestep;
1401 break;
1402 case TMT_HOUR:
1403 tm. tm_hour += basestep;
1405 break;
1406 case TMT_DAY:
1407 tm. tm_mday += basestep;
1409 break;
1410 case TMT_WEEK:
1411 tm. tm_mday += 7 * basestep;
1413 break;
1414 case TMT_MONTH:
1415 tm. tm_mon += basestep;
1417 break;
1418 case TMT_YEAR:
1419 tm. tm_year += basestep;
1420 }
1421 madetime = mktime(&tm);
1422 } while (madetime == -1); /* this is necessary to skip impssible times
1423 like the daylight saving time skips */
1424 return madetime;
1426 }
1429 /* calculate values required for PRINT and GPRINT functions */
1431 int print_calc(
1432 image_desc_t *im)
1433 {
1434 long i, ii, validsteps;
1435 double printval;
1436 struct tm tmvdef;
1437 int graphelement = 0;
1438 long vidx;
1439 int max_ii;
1440 double magfact = -1;
1441 char *si_symb = "";
1442 char *percent_s;
1443 int prline_cnt = 0;
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) {
1452 case GF_PRINT:
1453 case GF_GPRINT:
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.
1457 */
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);
1464 printval = DNAN;
1465 validsteps = 0;
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]))
1469 continue;
1470 if (isnan(printval)) {
1471 printval = im->gdes[vidx].data[ii];
1472 validsteps++;
1473 continue;
1474 }
1476 switch (im->gdes[i].cf) {
1477 case CF_HWPREDICT:
1478 case CF_MHWPREDICT:
1479 case CF_DEVPREDICT:
1480 case CF_DEVSEASONAL:
1481 case CF_SEASONAL:
1482 case CF_AVERAGE:
1483 validsteps++;
1484 printval += im->gdes[vidx].data[ii];
1485 break;
1486 case CF_MINIMUM:
1487 printval = min(printval, im->gdes[vidx].data[ii]);
1488 break;
1489 case CF_FAILURES:
1490 case CF_MAXIMUM:
1491 printval = max(printval, im->gdes[vidx].data[ii]);
1492 break;
1493 case CF_LAST:
1494 printval = im->gdes[vidx].data[ii];
1495 }
1496 }
1497 if (im->gdes[i].cf == CF_AVERAGE || im->gdes[i].cf > CF_LAST) {
1498 if (validsteps > 1) {
1499 printval = (printval / validsteps);
1500 }
1501 }
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)
1513 magfact = -1.0;
1514 } else {
1515 printval /= magfact;
1516 }
1517 *(++percent_s) = 's';
1518 } else if (strstr(im->gdes[i].format, "%s") != NULL) {
1519 auto_scale(im, &printval, &si_symb, &magfact);
1520 }
1522 if (im->gdes[i].gf == GF_PRINT) {
1523 infoval prline;
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)) {
1530 rrd_set_error
1531 ("bad format for PRINT in '%s'", im->gdes[i].format);
1532 return -1;
1533 } else {
1534 prline.u_str =
1535 sprintf_alloc(im->gdes[i].format, printval, si_symb);
1536 }
1537 grinfo_push(im,
1538 sprintf_alloc
1539 ("print[%ld]", prline_cnt++), RD_I_STR, prline);
1540 free(prline.u_str);
1541 } else {
1542 /* GF_GPRINT */
1544 if (im->gdes[i].strftm) {
1545 strftime(im->gdes[i].legend,
1546 FMT_LEG_LEN, im->gdes[i].format, &tmvdef);
1547 } else {
1548 if (bad_format(im->gdes[i].format)) {
1549 rrd_set_error
1550 ("bad format for GPRINT in '%s'",
1551 im->gdes[i].format);
1552 return -1;
1553 }
1554 #ifdef HAVE_SNPRINTF
1555 snprintf(im->gdes[i].legend,
1556 FMT_LEG_LEN - 2,
1557 im->gdes[i].format, printval, si_symb);
1558 #else
1559 sprintf(im->gdes[i].legend,
1560 im->gdes[i].format, printval, si_symb);
1561 #endif
1562 }
1563 graphelement = 1;
1564 }
1565 break;
1566 case GF_LINE:
1567 case GF_AREA:
1568 case GF_TICK:
1569 graphelement = 1;
1570 break;
1571 case GF_HRULE:
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;
1574 };
1575 graphelement = 1;
1576 break;
1577 case GF_VRULE:
1578 if (im->gdes[i].xrule == 0) { /* again ... the legend printer needs it */
1579 im->gdes[i].xrule = im->gdes[vidx].vf.when;
1580 };
1581 graphelement = 1;
1582 break;
1583 case GF_COMMENT:
1584 case GF_TEXTALIGN:
1585 case GF_DEF:
1586 case GF_CDEF:
1587 case GF_VDEF:
1588 #ifdef WITH_PIECHART
1589 case GF_PART:
1590 #endif
1591 case GF_SHIFT:
1592 case GF_XPORT:
1593 break;
1594 case GF_STACK:
1595 rrd_set_error
1596 ("STACK should already be turned into LINE or AREA here");
1597 return -1;
1598 break;
1599 }
1600 }
1601 return graphelement;
1602 }
1605 /* place legends with color spots */
1606 int leg_place(
1607 image_desc_t *im,
1608 int *gY)
1609 {
1610 /* graph labels */
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;
1614 int leg_c = 0;
1615 int leg_x = border, leg_y = im->yimg;
1616 int leg_y_prev = im->yimg;
1617 int leg_cc;
1618 int glue = 0;
1619 int i, ii, mark = 0;
1620 char prt_fctn; /*special printfunctions */
1621 char default_txtalign = TXA_JUSTIFIED; /*default line orientation */
1622 int *legspace;
1624 if (!(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH)) {
1625 if ((legspace = malloc(im->gdes_c * sizeof(int))) == NULL) {
1626 rrd_set_error("malloc for legspace");
1627 return -1;
1628 }
1630 if (im->extra_flags & FULL_SIZE_MODE)
1631 leg_y = leg_y_prev =
1632 leg_y - (int) (im->text_prop[TEXT_PROP_LEGEND].size * 1.8);
1633 for (i = 0; i < im->gdes_c; i++) {
1634 fill_last = fill;
1635 /* hide legends for rules which are not displayed */
1636 if (im->gdes[i].gf == GF_TEXTALIGN) {
1637 default_txtalign = im->gdes[i].txtalign;
1638 }
1640 if (!(im->extra_flags & FORCE_RULES_LEGEND)) {
1641 if (im->gdes[i].gf == GF_HRULE
1642 && (im->gdes[i].yrule <
1643 im->minval || im->gdes[i].yrule > im->maxval))
1644 im->gdes[i].legend[0] = '\0';
1645 if (im->gdes[i].gf == GF_VRULE
1646 && (im->gdes[i].xrule <
1647 im->start || im->gdes[i].xrule > im->end))
1648 im->gdes[i].legend[0] = '\0';
1649 }
1651 leg_cc = strlen(im->gdes[i].legend);
1652 /* is there a controle code ant the end of the legend string ? */
1653 /* and it is not a tab \\t */
1654 if (leg_cc >= 2
1655 && im->gdes[i].legend[leg_cc -
1656 2] == '\\'
1657 && im->gdes[i].legend[leg_cc - 1] != 't') {
1658 prt_fctn = im->gdes[i].legend[leg_cc - 1];
1659 leg_cc -= 2;
1660 im->gdes[i].legend[leg_cc] = '\0';
1661 } else {
1662 prt_fctn = '\0';
1663 }
1664 /* only valid control codes */
1665 if (prt_fctn != 'l' && prt_fctn != 'n' && /* a synonym for l */
1666 prt_fctn != 'r' &&
1667 prt_fctn != 'j' &&
1668 prt_fctn != 'c' &&
1669 prt_fctn != 's' &&
1670 prt_fctn != 't' && prt_fctn != '\0' && prt_fctn != 'g') {
1671 free(legspace);
1672 rrd_set_error
1673 ("Unknown control code at the end of '%s\\%c'",
1674 im->gdes[i].legend, prt_fctn);
1675 return -1;
1676 }
1677 /* \n -> \l */
1678 if (prt_fctn == 'n') {
1679 prt_fctn = 'l';
1680 }
1682 /* remove exess space from the end of the legend for \g */
1683 while (prt_fctn == 'g' &&
1684 leg_cc > 0 && im->gdes[i].legend[leg_cc - 1] == ' ') {
1685 leg_cc--;
1686 im->gdes[i].legend[leg_cc] = '\0';
1687 }
1689 if (leg_cc != 0) {
1691 /* no interleg space if string ends in \g */
1692 legspace[i] = (prt_fctn == 'g' ? 0 : interleg);
1693 if (fill > 0) {
1694 fill += legspace[i];
1695 }
1696 fill +=
1697 gfx_get_text_width(im,
1698 fill + border,
1699 im->
1700 text_prop
1701 [TEXT_PROP_LEGEND].
1702 font,
1703 im->
1704 text_prop
1705 [TEXT_PROP_LEGEND].
1706 size,
1707 im->tabwidth, im->gdes[i].legend);
1708 leg_c++;
1709 } else {
1710 legspace[i] = 0;
1711 }
1712 /* who said there was a special tag ... ? */
1713 if (prt_fctn == 'g') {
1714 prt_fctn = '\0';
1715 }
1717 if (prt_fctn == '\0') {
1718 if (i == im->gdes_c - 1 || fill > im->ximg - 2 * border) {
1719 /* just one legend item is left right or center */
1720 switch (default_txtalign) {
1721 case TXA_RIGHT:
1722 prt_fctn = 'r';
1723 break;
1724 case TXA_CENTER:
1725 prt_fctn = 'c';
1726 break;
1727 case TXA_JUSTIFIED:
1728 prt_fctn = 'j';
1729 break;
1730 default:
1731 prt_fctn = 'l';
1732 break;
1733 }
1734 }
1735 /* is it time to place the legends ? */
1736 if (fill > im->ximg - 2 * border) {
1737 if (leg_c > 1) {
1738 /* go back one */
1739 i--;
1740 fill = fill_last;
1741 leg_c--;
1742 }
1743 }
1744 if (leg_c == 1 && prt_fctn == 'j') {
1745 prt_fctn = 'l';
1746 }
1747 }
1750 if (prt_fctn != '\0') {
1751 leg_x = border;
1752 if (leg_c >= 2 && prt_fctn == 'j') {
1753 glue = (im->ximg - fill - 2 * border) / (leg_c - 1);
1754 } else {
1755 glue = 0;
1756 }
1757 if (prt_fctn == 'c')
1758 leg_x = (im->ximg - fill) / 2.0;
1759 if (prt_fctn == 'r')
1760 leg_x = im->ximg - fill - border;
1761 for (ii = mark; ii <= i; ii++) {
1762 if (im->gdes[ii].legend[0] == '\0')
1763 continue; /* skip empty legends */
1764 im->gdes[ii].leg_x = leg_x;
1765 im->gdes[ii].leg_y = leg_y;
1766 leg_x +=
1767 gfx_get_text_width(im, leg_x,
1768 im->
1769 text_prop
1770 [TEXT_PROP_LEGEND].
1771 font,
1772 im->
1773 text_prop
1774 [TEXT_PROP_LEGEND].
1775 size,
1776 im->tabwidth, im->gdes[ii].legend)
1777 + legspace[ii]
1778 + glue;
1779 }
1780 leg_y_prev = leg_y;
1781 if (im->extra_flags & FULL_SIZE_MODE) {
1782 /* only add y space if there was text on the line */
1783 if (leg_x > border || prt_fctn == 's')
1784 leg_y -= im->text_prop[TEXT_PROP_LEGEND].size * 1.8;
1785 if (prt_fctn == 's')
1786 leg_y += im->text_prop[TEXT_PROP_LEGEND].size;
1787 } else {
1788 if (leg_x > border || prt_fctn == 's')
1789 leg_y += im->text_prop[TEXT_PROP_LEGEND].size * 1.8;
1790 if (prt_fctn == 's')
1791 leg_y -= im->text_prop[TEXT_PROP_LEGEND].size;
1792 }
1793 fill = 0;
1794 leg_c = 0;
1795 mark = ii;
1796 }
1797 }
1799 if (im->extra_flags & FULL_SIZE_MODE) {
1800 if (leg_y != leg_y_prev) {
1801 *gY = leg_y - im->text_prop[TEXT_PROP_LEGEND].size * 1.8;
1802 im->yorigin =
1803 leg_y - im->text_prop[TEXT_PROP_LEGEND].size * 1.8;
1804 }
1805 } else {
1806 im->yimg = leg_y_prev;
1807 /* if we did place some legends we have to add vertical space */
1808 if (leg_y != im->yimg)
1809 im->yimg += im->text_prop[TEXT_PROP_LEGEND].size * 1.8;
1810 }
1811 free(legspace);
1812 }
1813 return 0;
1814 }
1816 /* create a grid on the graph. it determines what to do
1817 from the values of xsize, start and end */
1819 /* the xaxis labels are determined from the number of seconds per pixel
1820 in the requested graph */
1824 int calc_horizontal_grid(
1825 image_desc_t
1826 *im)
1827 {
1828 double range;
1829 double scaledrange;
1830 int pixel, i;
1831 int gridind = 0;
1832 int decimals, fractionals;
1834 im->ygrid_scale.labfact = 2;
1835 range = im->maxval - im->minval;
1836 scaledrange = range / im->magfact;
1837 /* does the scale of this graph make it impossible to put lines
1838 on it? If so, give up. */
1839 if (isnan(scaledrange)) {
1840 return 0;
1841 }
1843 /* find grid spaceing */
1844 pixel = 1;
1845 if (isnan(im->ygridstep)) {
1846 if (im->extra_flags & ALTYGRID) {
1847 /* find the value with max number of digits. Get number of digits */
1848 decimals =
1849 ceil(log10
1850 (max(fabs(im->maxval), fabs(im->minval)) *
1851 im->viewfactor / im->magfact));
1852 if (decimals <= 0) /* everything is small. make place for zero */
1853 decimals = 1;
1854 im->ygrid_scale.gridstep =
1855 pow((double) 10,
1856 floor(log10(range * im->viewfactor / im->magfact))) /
1857 im->viewfactor * im->magfact;
1858 if (im->ygrid_scale.gridstep == 0) /* range is one -> 0.1 is reasonable scale */
1859 im->ygrid_scale.gridstep = 0.1;
1860 /* should have at least 5 lines but no more then 15 */
1861 if (range / im->ygrid_scale.gridstep < 5)
1862 im->ygrid_scale.gridstep /= 10;
1863 if (range / im->ygrid_scale.gridstep > 15)
1864 im->ygrid_scale.gridstep *= 10;
1865 if (range / im->ygrid_scale.gridstep > 5) {
1866 im->ygrid_scale.labfact = 1;
1867 if (range / im->ygrid_scale.gridstep > 8)
1868 im->ygrid_scale.labfact = 2;
1869 } else {
1870 im->ygrid_scale.gridstep /= 5;
1871 im->ygrid_scale.labfact = 5;
1872 }
1873 fractionals =
1874 floor(log10
1875 (im->ygrid_scale.gridstep *
1876 (double) im->ygrid_scale.labfact * im->viewfactor /
1877 im->magfact));
1878 if (fractionals < 0) { /* small amplitude. */
1879 int len = decimals - fractionals + 1;
1881 if (im->unitslength < len + 2)
1882 im->unitslength = len + 2;
1883 sprintf(im->ygrid_scale.labfmt,
1884 "%%%d.%df%s", len,
1885 -fractionals, (im->symbol != ' ' ? " %c" : ""));
1886 } else {
1887 int len = decimals + 1;
1889 if (im->unitslength < len + 2)
1890 im->unitslength = len + 2;
1891 sprintf(im->ygrid_scale.labfmt,
1892 "%%%d.0f%s", len, (im->symbol != ' ' ? " %c" : ""));
1893 }
1894 } else {
1895 for (i = 0; ylab[i].grid > 0; i++) {
1896 pixel = im->ysize / (scaledrange / ylab[i].grid);
1897 gridind = i;
1898 if (pixel > 7)
1899 break;
1900 }
1902 for (i = 0; i < 4; i++) {
1903 if (pixel * ylab[gridind].lfac[i] >=
1904 2.5 * im->text_prop[TEXT_PROP_AXIS].size) {
1905 im->ygrid_scale.labfact = ylab[gridind].lfac[i];
1906 break;
1907 }
1908 }
1910 im->ygrid_scale.gridstep = ylab[gridind].grid * im->magfact;
1911 }
1912 } else {
1913 im->ygrid_scale.gridstep = im->ygridstep;
1914 im->ygrid_scale.labfact = im->ylabfact;
1915 }
1916 return 1;
1917 }
1919 int draw_horizontal_grid(
1920 image_desc_t
1921 *im)
1922 {
1923 int i;
1924 double scaledstep;
1925 char graph_label[100];
1926 int nlabels = 0;
1927 double X0 = im->xorigin;
1928 double X1 = im->xorigin + im->xsize;
1929 int sgrid = (int) (im->minval / im->ygrid_scale.gridstep - 1);
1930 int egrid = (int) (im->maxval / im->ygrid_scale.gridstep + 1);
1931 double MaxY;
1933 scaledstep =
1934 im->ygrid_scale.gridstep /
1935 (double) im->magfact * (double) im->viewfactor;
1936 MaxY = scaledstep * (double) egrid;
1937 for (i = sgrid; i <= egrid; i++) {
1938 double Y0 = ytr(im,
1939 im->ygrid_scale.gridstep * i);
1940 double YN = ytr(im,
1941 im->ygrid_scale.gridstep * (i + 1));
1943 if (floor(Y0 + 0.5) >=
1944 im->yorigin - im->ysize && floor(Y0 + 0.5) <= im->yorigin) {
1945 /* Make sure at least 2 grid labels are shown, even if it doesn't agree
1946 with the chosen settings. Add a label if required by settings, or if
1947 there is only one label so far and the next grid line is out of bounds. */
1948 if (i % im->ygrid_scale.labfact == 0
1949 || (nlabels == 1
1950 && (YN < im->yorigin - im->ysize || YN > im->yorigin))) {
1951 if (im->symbol == ' ') {
1952 if (im->extra_flags & ALTYGRID) {
1953 sprintf(graph_label,
1954 im->ygrid_scale.labfmt,
1955 scaledstep * (double) i);
1956 } else {
1957 if (MaxY < 10) {
1958 sprintf(graph_label, "%4.1f",
1959 scaledstep * (double) i);
1960 } else {
1961 sprintf(graph_label, "%4.0f",
1962 scaledstep * (double) i);
1963 }
1964 }
1965 } else {
1966 char sisym = (i == 0 ? ' ' : im->symbol);
1968 if (im->extra_flags & ALTYGRID) {
1969 sprintf(graph_label,
1970 im->ygrid_scale.labfmt,
1971 scaledstep * (double) i, sisym);
1972 } else {
1973 if (MaxY < 10) {
1974 sprintf(graph_label, "%4.1f %c",
1975 scaledstep * (double) i, sisym);
1976 } else {
1977 sprintf(graph_label, "%4.0f %c",
1978 scaledstep * (double) i, sisym);
1979 }
1980 }
1981 }
1982 nlabels++;
1983 gfx_text(im,
1984 X0 -
1985 im->
1986 text_prop[TEXT_PROP_AXIS].
1987 size, Y0,
1988 im->graph_col[GRC_FONT],
1989 im->
1990 text_prop[TEXT_PROP_AXIS].
1991 font,
1992 im->
1993 text_prop[TEXT_PROP_AXIS].
1994 size, im->tabwidth, 0.0,
1995 GFX_H_RIGHT, GFX_V_CENTER, graph_label);
1996 gfx_line(im, X0 - 2, Y0, X0, Y0,
1997 MGRIDWIDTH, im->graph_col[GRC_MGRID]);
1998 gfx_line(im, X1, Y0, X1 + 2, Y0,
1999 MGRIDWIDTH, im->graph_col[GRC_MGRID]);
2000 gfx_dashed_line(im, X0 - 2, Y0,
2001 X1 + 2, Y0,
2002 MGRIDWIDTH,
2003 im->
2004 graph_col
2005 [GRC_MGRID],
2006 im->grid_dash_on, im->grid_dash_off);
2007 } else if (!(im->extra_flags & NOMINOR)) {
2008 gfx_line(im,
2009 X0 - 2, Y0,
2010 X0, Y0, GRIDWIDTH, im->graph_col[GRC_GRID]);
2011 gfx_line(im, X1, Y0, X1 + 2, Y0,
2012 GRIDWIDTH, im->graph_col[GRC_GRID]);
2013 gfx_dashed_line(im, X0 - 1, Y0,
2014 X1 + 1, Y0,
2015 GRIDWIDTH,
2016 im->
2017 graph_col[GRC_GRID],
2018 im->grid_dash_on, im->grid_dash_off);
2019 }
2020 }
2021 }
2022 return 1;
2023 }
2025 /* this is frexp for base 10 */
2026 double frexp10(
2027 double,
2028 double *);
2029 double frexp10(
2030 double x,
2031 double *e)
2032 {
2033 double mnt;
2034 int iexp;
2036 iexp = floor(log(fabs(x)) / log(10));
2037 mnt = x / pow(10.0, iexp);
2038 if (mnt >= 10.0) {
2039 iexp++;
2040 mnt = x / pow(10.0, iexp);
2041 }
2042 *e = iexp;
2043 return mnt;
2044 }
2047 /* logaritmic horizontal grid */
2048 int horizontal_log_grid(
2049 image_desc_t
2050 *im)
2051 {
2052 double yloglab[][10] = {
2053 {
2054 1.0, 10., 0.0, 0.0, 0.0, 0.0, 0.0,
2055 0.0, 0.0, 0.0}, {
2056 1.0, 5.0, 10., 0.0, 0.0, 0.0, 0.0,
2057 0.0, 0.0, 0.0}, {
2058 1.0, 2.0, 5.0, 7.0, 10., 0.0, 0.0,
2059 0.0, 0.0, 0.0}, {
2060 1.0, 2.0, 4.0,
2061 6.0, 8.0, 10.,
2062 0.0,
2063 0.0, 0.0, 0.0}, {
2064 1.0,
2065 2.0,
2066 3.0,
2067 4.0,
2068 5.0,
2069 6.0,
2070 7.0,
2071 8.0,
2072 9.0,
2073 10.},
2074 {
2075 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} /* last line */
2076 };
2077 int i, j, val_exp, min_exp;
2078 double nex; /* number of decades in data */
2079 double logscale; /* scale in logarithmic space */
2080 int exfrac = 1; /* decade spacing */
2081 int mid = -1; /* row in yloglab for major grid */
2082 double mspac; /* smallest major grid spacing (pixels) */
2083 int flab; /* first value in yloglab to use */
2084 double value, tmp, pre_value;
2085 double X0, X1, Y0;
2086 char graph_label[100];
2088 nex = log10(im->maxval / im->minval);
2089 logscale = im->ysize / nex;
2090 /* major spacing for data with high dynamic range */
2091 while (logscale * exfrac < 3 * im->text_prop[TEXT_PROP_LEGEND].size) {
2092 if (exfrac == 1)
2093 exfrac = 3;
2094 else
2095 exfrac += 3;
2096 }
2098 /* major spacing for less dynamic data */
2099 do {
2100 /* search best row in yloglab */
2101 mid++;
2102 for (i = 0; yloglab[mid][i + 1] < 10.0; i++);
2103 mspac = logscale * log10(10.0 / yloglab[mid][i]);
2104 }
2105 while (mspac >
2106 2 * im->text_prop[TEXT_PROP_LEGEND].size && yloglab[mid][0] > 0);
2107 if (mid)
2108 mid--;
2109 /* find first value in yloglab */
2110 for (flab = 0;
2111 yloglab[mid][flab] < 10
2112 && frexp10(im->minval, &tmp) > yloglab[mid][flab]; flab++);
2113 if (yloglab[mid][flab] == 10.0) {
2114 tmp += 1.0;
2115 flab = 0;
2116 }
2117 val_exp = tmp;
2118 if (val_exp % exfrac)
2119 val_exp += abs(-val_exp % exfrac);
2120 X0 = im->xorigin;
2121 X1 = im->xorigin + im->xsize;
2122 /* draw grid */
2123 pre_value = DNAN;
2124 while (1) {
2126 value = yloglab[mid][flab] * pow(10.0, val_exp);
2127 if (AlmostEqual2sComplement(value, pre_value, 4))
2128 break; /* it seems we are not converging */
2129 pre_value = value;
2130 Y0 = ytr(im, value);
2131 if (floor(Y0 + 0.5) <= im->yorigin - im->ysize)
2132 break;
2133 /* major grid line */
2134 gfx_line(im,
2135 X0 - 2, Y0, X0, Y0, MGRIDWIDTH, im->graph_col[GRC_MGRID]);
2136 gfx_line(im, X1, Y0, X1 + 2, Y0,
2137 MGRIDWIDTH, im->graph_col[GRC_MGRID]);
2138 gfx_dashed_line(im, X0 - 2, Y0,
2139 X1 + 2, Y0,
2140 MGRIDWIDTH,
2141 im->
2142 graph_col
2143 [GRC_MGRID], im->grid_dash_on, im->grid_dash_off);
2144 /* label */
2145 if (im->extra_flags & FORCE_UNITS_SI) {
2146 int scale;
2147 double pvalue;
2148 char symbol;
2150 scale = floor(val_exp / 3.0);
2151 if (value >= 1.0)
2152 pvalue = pow(10.0, val_exp % 3);
2153 else
2154 pvalue = pow(10.0, ((val_exp + 1) % 3) + 2);
2155 pvalue *= yloglab[mid][flab];
2156 if (((scale + si_symbcenter) < (int) sizeof(si_symbol))
2157 && ((scale + si_symbcenter) >= 0))
2158 symbol = si_symbol[scale + si_symbcenter];
2159 else
2160 symbol = '?';
2161 sprintf(graph_label, "%3.0f %c", pvalue, symbol);
2162 } else
2163 sprintf(graph_label, "%3.0e", value);
2164 gfx_text(im,
2165 X0 -
2166 im->
2167 text_prop[TEXT_PROP_AXIS].
2168 size, Y0,
2169 im->graph_col[GRC_FONT],
2170 im->
2171 text_prop[TEXT_PROP_AXIS].
2172 font,
2173 im->
2174 text_prop[TEXT_PROP_AXIS].
2175 size, im->tabwidth, 0.0,
2176 GFX_H_RIGHT, GFX_V_CENTER, graph_label);
2177 /* minor grid */
2178 if (mid < 4 && exfrac == 1) {
2179 /* find first and last minor line behind current major line
2180 * i is the first line and j tha last */
2181 if (flab == 0) {
2182 min_exp = val_exp - 1;
2183 for (i = 1; yloglab[mid][i] < 10.0; i++);
2184 i = yloglab[mid][i - 1] + 1;
2185 j = 10;
2186 } else {
2187 min_exp = val_exp;
2188 i = yloglab[mid][flab - 1] + 1;
2189 j = yloglab[mid][flab];
2190 }
2192 /* draw minor lines below current major line */
2193 for (; i < j; i++) {
2195 value = i * pow(10.0, min_exp);
2196 if (value < im->minval)
2197 continue;
2198 Y0 = ytr(im, value);
2199 if (floor(Y0 + 0.5) <= im->yorigin - im->ysize)
2200 break;
2201 /* draw lines */
2202 gfx_line(im,
2203 X0 - 2, Y0,
2204 X0, Y0, GRIDWIDTH, im->graph_col[GRC_GRID]);
2205 gfx_line(im, X1, Y0, X1 + 2, Y0,
2206 GRIDWIDTH, im->graph_col[GRC_GRID]);
2207 gfx_dashed_line(im, X0 - 1, Y0,
2208 X1 + 1, Y0,
2209 GRIDWIDTH,
2210 im->
2211 graph_col[GRC_GRID],
2212 im->grid_dash_on, im->grid_dash_off);
2213 }
2214 } else if (exfrac > 1) {
2215 for (i = val_exp - exfrac / 3 * 2; i < val_exp; i += exfrac / 3) {
2216 value = pow(10.0, i);
2217 if (value < im->minval)
2218 continue;
2219 Y0 = ytr(im, value);
2220 if (floor(Y0 + 0.5) <= im->yorigin - im->ysize)
2221 break;
2222 /* draw lines */
2223 gfx_line(im,
2224 X0 - 2, Y0,
2225 X0, Y0, GRIDWIDTH, im->graph_col[GRC_GRID]);
2226 gfx_line(im, X1, Y0, X1 + 2, Y0,
2227 GRIDWIDTH, im->graph_col[GRC_GRID]);
2228 gfx_dashed_line(im, X0 - 1, Y0,
2229 X1 + 1, Y0,
2230 GRIDWIDTH,
2231 im->
2232 graph_col[GRC_GRID],
2233 im->grid_dash_on, im->grid_dash_off);
2234 }
2235 }
2237 /* next decade */
2238 if (yloglab[mid][++flab] == 10.0) {
2239 flab = 0;
2240 val_exp += exfrac;
2241 }
2242 }
2244 /* draw minor lines after highest major line */
2245 if (mid < 4 && exfrac == 1) {
2246 /* find first and last minor line below current major line
2247 * i is the first line and j tha last */
2248 if (flab == 0) {
2249 min_exp = val_exp - 1;
2250 for (i = 1; yloglab[mid][i] < 10.0; i++);
2251 i = yloglab[mid][i - 1] + 1;
2252 j = 10;
2253 } else {
2254 min_exp = val_exp;
2255 i = yloglab[mid][flab - 1] + 1;
2256 j = yloglab[mid][flab];
2257 }
2259 /* draw minor lines below current major line */
2260 for (; i < j; i++) {
2262 value = i * pow(10.0, min_exp);
2263 if (value < im->minval)
2264 continue;
2265 Y0 = ytr(im, value);
2266 if (floor(Y0 + 0.5) <= im->yorigin - im->ysize)
2267 break;
2268 /* draw lines */
2269 gfx_line(im,
2270 X0 - 2, Y0, X0, Y0, GRIDWIDTH, im->graph_col[GRC_GRID]);
2271 gfx_line(im, X1, Y0, X1 + 2, Y0,
2272 GRIDWIDTH, im->graph_col[GRC_GRID]);
2273 gfx_dashed_line(im, X0 - 1, Y0,
2274 X1 + 1, Y0,
2275 GRIDWIDTH,
2276 im->
2277 graph_col[GRC_GRID],
2278 im->grid_dash_on, im->grid_dash_off);
2279 }
2280 }
2281 /* fancy minor gridlines */
2282 else if (exfrac > 1) {
2283 for (i = val_exp - exfrac / 3 * 2; i < val_exp; i += exfrac / 3) {
2284 value = pow(10.0, i);
2285 if (value < im->minval)
2286 continue;
2287 Y0 = ytr(im, value);
2288 if (floor(Y0 + 0.5) <= im->yorigin - im->ysize)
2289 break;
2290 /* draw lines */
2291 gfx_line(im,
2292 X0 - 2, Y0, X0, Y0, GRIDWIDTH, im->graph_col[GRC_GRID]);
2293 gfx_line(im, X1, Y0, X1 + 2, Y0,
2294 GRIDWIDTH, im->graph_col[GRC_GRID]);
2295 gfx_dashed_line(im, X0 - 1, Y0,
2296 X1 + 1, Y0,
2297 GRIDWIDTH,
2298 im->
2299 graph_col[GRC_GRID],
2300 im->grid_dash_on, im->grid_dash_off);
2301 }
2302 }
2304 return 1;
2305 }
2308 void vertical_grid(
2309 image_desc_t *im)
2310 {
2311 int xlab_sel; /* which sort of label and grid ? */
2312 time_t ti, tilab, timajor;
2313 long factor;
2314 char graph_label[100];
2315 double X0, Y0, Y1; /* points for filled graph and more */
2316 struct tm tm;
2318 /* the type of time grid is determined by finding
2319 the number of seconds per pixel in the graph */
2320 if (im->xlab_user.minsec == -1) {
2321 factor = (im->end - im->start) / im->xsize;
2322 xlab_sel = 0;
2323 while (xlab[xlab_sel + 1].minsec !=
2324 -1 && xlab[xlab_sel + 1].minsec <= factor) {
2325 xlab_sel++;
2326 } /* pick the last one */
2327 while (xlab[xlab_sel - 1].minsec ==
2328 xlab[xlab_sel].minsec
2329 && xlab[xlab_sel].length > (im->end - im->start)) {
2330 xlab_sel--;
2331 } /* go back to the smallest size */
2332 im->xlab_user.gridtm = xlab[xlab_sel].gridtm;
2333 im->xlab_user.gridst = xlab[xlab_sel].gridst;
2334 im->xlab_user.mgridtm = xlab[xlab_sel].mgridtm;
2335 im->xlab_user.mgridst = xlab[xlab_sel].mgridst;
2336 im->xlab_user.labtm = xlab[xlab_sel].labtm;
2337 im->xlab_user.labst = xlab[xlab_sel].labst;
2338 im->xlab_user.precis = xlab[xlab_sel].precis;
2339 im->xlab_user.stst = xlab[xlab_sel].stst;
2340 }
2342 /* y coords are the same for every line ... */
2343 Y0 = im->yorigin;
2344 Y1 = im->yorigin - im->ysize;
2345 /* paint the minor grid */
2346 if (!(im->extra_flags & NOMINOR)) {
2347 for (ti = find_first_time(im->start,
2348 im->
2349 xlab_user.
2350 gridtm,
2351 im->
2352 xlab_user.
2353 gridst),
2354 timajor =
2355 find_first_time(im->start,
2356 im->xlab_user.
2357 mgridtm,
2358 im->xlab_user.
2359 mgridst);
2360 ti < im->end;
2361 ti =
2362 find_next_time(ti, im->xlab_user.gridtm, im->xlab_user.gridst)
2363 ) {
2364 /* are we inside the graph ? */
2365 if (ti < im->start || ti > im->end)
2366 continue;
2367 while (timajor < ti) {
2368 timajor = find_next_time(timajor,
2369 im->
2370 xlab_user.
2371 mgridtm, im->xlab_user.mgridst);
2372 }
2373 if (ti == timajor)
2374 continue; /* skip as falls on major grid line */
2375 X0 = xtr(im, ti);
2376 gfx_line(im, X0, Y1 - 2, X0, Y1,
2377 GRIDWIDTH, im->graph_col[GRC_GRID]);
2378 gfx_line(im, X0, Y0, X0, Y0 + 2,
2379 GRIDWIDTH, im->graph_col[GRC_GRID]);
2380 gfx_dashed_line(im, X0, Y0 + 1, X0,
2381 Y1 - 1, GRIDWIDTH,
2382 im->
2383 graph_col[GRC_GRID],
2384 im->grid_dash_on, im->grid_dash_off);
2385 }
2386 }
2388 /* paint the major grid */
2389 for (ti = find_first_time(im->start,
2390 im->
2391 xlab_user.
2392 mgridtm,
2393 im->
2394 xlab_user.
2395 mgridst);
2396 ti < im->end;
2397 ti = find_next_time(ti, im->xlab_user.mgridtm, im->xlab_user.mgridst)
2398 ) {
2399 /* are we inside the graph ? */
2400 if (ti < im->start || ti > im->end)
2401 continue;
2402 X0 = xtr(im, ti);
2403 gfx_line(im, X0, Y1 - 2, X0, Y1,
2404 MGRIDWIDTH, im->graph_col[GRC_MGRID]);
2405 gfx_line(im, X0, Y0, X0, Y0 + 3,
2406 MGRIDWIDTH, im->graph_col[GRC_MGRID]);
2407 gfx_dashed_line(im, X0, Y0 + 3, X0,
2408 Y1 - 2, MGRIDWIDTH,
2409 im->
2410 graph_col
2411 [GRC_MGRID], im->grid_dash_on, im->grid_dash_off);
2412 }
2413 /* paint the labels below the graph */
2414 for (ti =
2415 find_first_time(im->start -
2416 im->xlab_user.
2417 precis / 2,
2418 im->xlab_user.
2419 labtm,
2420 im->xlab_user.
2421 labst);
2422 ti <=
2423 im->end -
2424 im->xlab_user.precis / 2;
2425 ti = find_next_time(ti, im->xlab_user.labtm, im->xlab_user.labst)
2426 ) {
2427 tilab = ti + im->xlab_user.precis / 2; /* correct time for the label */
2428 /* are we inside the graph ? */
2429 if (tilab < im->start || tilab > im->end)
2430 continue;
2431 #if HAVE_STRFTIME
2432 localtime_r(&tilab, &tm);
2433 strftime(graph_label, 99, im->xlab_user.stst, &tm);
2434 #else
2435 # error "your libc has no strftime I guess we'll abort the exercise here."
2436 #endif
2437 gfx_text(im,
2438 xtr(im, tilab),
2439 Y0 + 3,
2440 im->graph_col[GRC_FONT],
2441 im->
2442 text_prop[TEXT_PROP_AXIS].
2443 font,
2444 im->
2445 text_prop[TEXT_PROP_AXIS].
2446 size, im->tabwidth, 0.0,
2447 GFX_H_CENTER, GFX_V_TOP, graph_label);
2448 }
2450 }
2453 void axis_paint(
2454 image_desc_t *im)
2455 {
2456 /* draw x and y axis */
2457 /* gfx_line ( im->canvas, im->xorigin+im->xsize,im->yorigin,
2458 im->xorigin+im->xsize,im->yorigin-im->ysize,
2459 GRIDWIDTH, im->graph_col[GRC_AXIS]);
2461 gfx_line ( im->canvas, im->xorigin,im->yorigin-im->ysize,
2462 im->xorigin+im->xsize,im->yorigin-im->ysize,
2463 GRIDWIDTH, im->graph_col[GRC_AXIS]); */
2465 gfx_line(im, im->xorigin - 4,
2466 im->yorigin,
2467 im->xorigin + im->xsize +
2468 4, im->yorigin, MGRIDWIDTH, im->graph_col[GRC_AXIS]);
2469 gfx_line(im, im->xorigin,
2470 im->yorigin + 4,
2471 im->xorigin,
2472 im->yorigin - im->ysize -
2473 4, MGRIDWIDTH, im->graph_col[GRC_AXIS]);
2474 /* arrow for X and Y axis direction */
2475 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 */
2476 im->graph_col[GRC_ARROW]);
2477 gfx_close_path(im);
2478 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 */
2479 im->graph_col[GRC_ARROW]);
2480 gfx_close_path(im);
2481 }
2483 void grid_paint(
2484 image_desc_t *im)
2485 {
2486 long i;
2487 int res = 0;
2488 double X0, Y0; /* points for filled graph and more */
2489 struct gfx_color_t water_color;
2491 /* draw 3d border */
2492 gfx_new_area(im, 0, im->yimg,
2493 2, im->yimg - 2, 2, 2, im->graph_col[GRC_SHADEA]);
2494 gfx_add_point(im, im->ximg - 2, 2);
2495 gfx_add_point(im, im->ximg, 0);
2496 gfx_add_point(im, 0, 0);
2497 gfx_close_path(im);
2498 gfx_new_area(im, 2, im->yimg - 2,
2499 im->ximg - 2,
2500 im->yimg - 2, im->ximg - 2, 2, im->graph_col[GRC_SHADEB]);
2501 gfx_add_point(im, im->ximg, 0);
2502 gfx_add_point(im, im->ximg, im->yimg);
2503 gfx_add_point(im, 0, im->yimg);
2504 gfx_close_path(im);
2505 if (im->draw_x_grid == 1)
2506 vertical_grid(im);
2507 if (im->draw_y_grid == 1) {
2508 if (im->logarithmic) {
2509 res = horizontal_log_grid(im);
2510 } else {
2511 res = draw_horizontal_grid(im);
2512 }
2514 /* dont draw horizontal grid if there is no min and max val */
2515 if (!res) {
2516 char *nodata = "No Data found";
2518 gfx_text(im, im->ximg / 2,
2519 (2 * im->yorigin -
2520 im->ysize) / 2,
2521 im->graph_col[GRC_FONT],
2522 im->
2523 text_prop[TEXT_PROP_AXIS].
2524 font,
2525 im->
2526 text_prop[TEXT_PROP_AXIS].
2527 size, im->tabwidth, 0.0,
2528 GFX_H_CENTER, GFX_V_CENTER, nodata);
2529 }
2530 }
2532 /* yaxis unit description */
2533 gfx_text(im,
2534 10,
2535 (im->yorigin -
2536 im->ysize / 2),
2537 im->graph_col[GRC_FONT],
2538 im->
2539 text_prop[TEXT_PROP_UNIT].
2540 font,
2541 im->
2542 text_prop[TEXT_PROP_UNIT].
2543 size, im->tabwidth,
2544 RRDGRAPH_YLEGEND_ANGLE, GFX_H_CENTER, GFX_V_CENTER, im->ylegend);
2545 /* graph title */
2546 gfx_text(im,
2547 im->ximg / 2, 6,
2548 im->graph_col[GRC_FONT],
2549 im->
2550 text_prop[TEXT_PROP_TITLE].
2551 font,
2552 im->
2553 text_prop[TEXT_PROP_TITLE].
2554 size, im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_TOP, im->title);
2555 /* rrdtool 'logo' */
2556 water_color = im->graph_col[GRC_FONT];
2557 water_color.alpha = 0.3;
2558 gfx_text(im, im->ximg - 4, 5,
2559 water_color,
2560 im->
2561 text_prop[TEXT_PROP_AXIS].
2562 font, 5.5, im->tabwidth,
2563 -90, GFX_H_LEFT, GFX_V_TOP, "RRDTOOL / TOBI OETIKER");
2564 /* graph watermark */
2565 if (im->watermark[0] != '\0') {
2566 gfx_text(im,
2567 im->ximg / 2, im->yimg - 6,
2568 water_color,
2569 im->
2570 text_prop[TEXT_PROP_AXIS].
2571 font, 5.5, im->tabwidth, 0,
2572 GFX_H_CENTER, GFX_V_BOTTOM, im->watermark);
2573 }
2575 /* graph labels */
2576 if (!(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH)) {
2577 for (i = 0; i < im->gdes_c; i++) {
2578 if (im->gdes[i].legend[0] == '\0')
2579 continue;
2580 /* im->gdes[i].leg_y is the bottom of the legend */
2581 X0 = im->gdes[i].leg_x;
2582 Y0 = im->gdes[i].leg_y;
2583 gfx_text(im, X0, Y0,
2584 im->graph_col[GRC_FONT],
2585 im->
2586 text_prop
2587 [TEXT_PROP_LEGEND].font,
2588 im->
2589 text_prop
2590 [TEXT_PROP_LEGEND].size,
2591 im->tabwidth, 0.0,
2592 GFX_H_LEFT, GFX_V_BOTTOM, im->gdes[i].legend);
2593 /* The legend for GRAPH items starts with "M " to have
2594 enough space for the box */
2595 if (im->gdes[i].gf != GF_PRINT &&
2596 im->gdes[i].gf != GF_GPRINT && im->gdes[i].gf != GF_COMMENT) {
2597 double boxH, boxV;
2598 double X1, Y1;
2600 boxH = gfx_get_text_width(im, 0,
2601 im->
2602 text_prop
2603 [TEXT_PROP_LEGEND].
2604 font,
2605 im->
2606 text_prop
2607 [TEXT_PROP_LEGEND].
2608 size, im->tabwidth, "o") * 1.2;
2609 boxV = boxH;
2610 /* shift the box up a bit */
2611 Y0 -= boxV * 0.4;
2612 /* make sure transparent colors show up the same way as in the graph */
2613 gfx_new_area(im,
2614 X0, Y0 - boxV,
2615 X0, Y0, X0 + boxH, Y0, im->graph_col[GRC_BACK]);
2616 gfx_add_point(im, X0 + boxH, Y0 - boxV);
2617 gfx_close_path(im);
2618 gfx_new_area(im, X0, Y0 - boxV, X0,
2619 Y0, X0 + boxH, Y0, im->gdes[i].col);
2620 gfx_add_point(im, X0 + boxH, Y0 - boxV);
2621 gfx_close_path(im);
2622 cairo_save(im->cr);
2623 cairo_new_path(im->cr);
2624 cairo_set_line_width(im->cr, 1.0);
2625 X1 = X0 + boxH;
2626 Y1 = Y0 - boxV;
2627 gfx_line_fit(im, &X0, &Y0);
2628 gfx_line_fit(im, &X1, &Y1);
2629 cairo_move_to(im->cr, X0, Y0);
2630 cairo_line_to(im->cr, X1, Y0);
2631 cairo_line_to(im->cr, X1, Y1);
2632 cairo_line_to(im->cr, X0, Y1);
2633 cairo_close_path(im->cr);
2634 cairo_set_source_rgba(im->cr,
2635 im->
2636 graph_col
2637 [GRC_FRAME].
2638 red,
2639 im->
2640 graph_col
2641 [GRC_FRAME].
2642 green,
2643 im->
2644 graph_col
2645 [GRC_FRAME].
2646 blue, im->graph_col[GRC_FRAME].alpha);
2647 if (im->gdes[i].dash) {
2648 /* make box borders in legend dashed if the graph is dashed */
2649 double dashes[] = {
2650 3.0
2651 };
2652 cairo_set_dash(im->cr, dashes, 1, 0.0);
2653 }
2654 cairo_stroke(im->cr);
2655 cairo_restore(im->cr);
2656 }
2657 }
2658 }
2659 }
2662 /*****************************************************
2663 * lazy check make sure we rely need to create this graph
2664 *****************************************************/
2666 int lazy_check(
2667 image_desc_t *im)
2668 {
2669 FILE *fd = NULL;
2670 int size = 1;
2671 struct stat imgstat;
2673 if (im->lazy == 0)
2674 return 0; /* no lazy option */
2675 if (strlen(im->graphfile) == 0)
2676 return 0; /* inmemory option */
2677 if (stat(im->graphfile, &imgstat) != 0)
2678 return 0; /* can't stat */
2679 /* one pixel in the existing graph is more then what we would
2680 change here ... */
2681 if (time(NULL) - imgstat.st_mtime > (im->end - im->start) / im->xsize)
2682 return 0;
2683 if ((fd = fopen(im->graphfile, "rb")) == NULL)
2684 return 0; /* the file does not exist */
2685 switch (im->imgformat) {
2686 case IF_PNG:
2687 size = PngSize(fd, &(im->ximg), &(im->yimg));
2688 break;
2689 default:
2690 size = 1;
2691 }
2692 fclose(fd);
2693 return size;
2694 }
2697 int graph_size_location(
2698 image_desc_t
2699 *im,
2700 int elements)
2701 {
2702 /* The actual size of the image to draw is determined from
2703 ** several sources. The size given on the command line is
2704 ** the graph area but we need more as we have to draw labels
2705 ** and other things outside the graph area
2706 */
2708 int Xvertical = 0, Ytitle =
2709 0, Xylabel = 0, Xmain = 0, Ymain =
2710 0, Yxlabel = 0, Xspacing = 15, Yspacing = 15, Ywatermark = 4;
2712 if (im->extra_flags & ONLY_GRAPH) {
2713 im->xorigin = 0;
2714 im->ximg = im->xsize;
2715 im->yimg = im->ysize;
2716 im->yorigin = im->ysize;
2717 ytr(im, DNAN);
2718 return 0;
2719 }
2721 /** +---+--------------------------------------------+
2722 ** | y |...............graph title..................|
2723 ** | +---+-------------------------------+--------+
2724 ** | a | y | | |
2725 ** | x | | | |
2726 ** | i | a | | pie |
2727 ** | s | x | main graph area | chart |
2728 ** | | i | | area |
2729 ** | t | s | | |
2730 ** | i | | | |
2731 ** | t | l | | |
2732 ** | l | b +-------------------------------+--------+
2733 ** | e | l | x axis labels | |
2734 ** +---+---+-------------------------------+--------+
2735 ** |....................legends.....................|
2736 ** +------------------------------------------------+
2737 ** | watermark |
2738 ** +------------------------------------------------+
2739 */
2741 if (im->ylegend[0] != '\0') {
2742 Xvertical = im->text_prop[TEXT_PROP_UNIT].size * 2;
2743 }
2745 if (im->title[0] != '\0') {
2746 /* The title is placed "inbetween" two text lines so it
2747 ** automatically has some vertical spacing. The horizontal
2748 ** spacing is added here, on each side.
2749 */
2750 /* if necessary, reduce the font size of the title until it fits the image width */
2751 Ytitle = im->text_prop[TEXT_PROP_TITLE].size * 2.6 + 10;
2752 }
2754 if (elements) {
2755 if (im->draw_x_grid) {
2756 Yxlabel = im->text_prop[TEXT_PROP_AXIS].size * 2.5;
2757 }
2758 if (im->draw_y_grid || im->forceleftspace) {
2759 Xylabel =
2760 gfx_get_text_width(im, 0,
2761 im->
2762 text_prop
2763 [TEXT_PROP_AXIS].
2764 font,
2765 im->
2766 text_prop
2767 [TEXT_PROP_AXIS].
2768 size, im->tabwidth, "0") * im->unitslength;
2769 }
2770 }
2772 if (im->extra_flags & FULL_SIZE_MODE) {
2773 /* The actual size of the image to draw has been determined by the user.
2774 ** The graph area is the space remaining after accounting for the legend,
2775 ** the watermark, the pie chart, the axis labels, and the title.
2776 */
2777 im->xorigin = 0;
2778 im->ximg = im->xsize;
2779 im->yimg = im->ysize;
2780 im->yorigin = im->ysize;
2781 Xmain = im->ximg;
2782 Ymain = im->yimg;
2783 im->yorigin += Ytitle;
2784 /* Now calculate the total size. Insert some spacing where
2785 desired. im->xorigin and im->yorigin need to correspond
2786 with the lower left corner of the main graph area or, if
2787 this one is not set, the imaginary box surrounding the
2788 pie chart area. */
2789 /* Initial size calculation for the main graph area */
2790 Xmain = im->ximg - (Xylabel + 2 * Xspacing);
2791 if (Xmain)
2792 Xmain -= Xspacing; /* put space between main graph area and right edge */
2793 im->xorigin = Xspacing + Xylabel;
2794 /* the length of the title should not influence with width of the graph
2795 if (Xtitle > im->ximg) im->ximg = Xtitle; */
2796 if (Xvertical) { /* unit description */
2797 Xmain -= Xvertical;
2798 im->xorigin += Xvertical;
2799 }
2800 im->xsize = Xmain;
2801 xtr(im, 0);
2802 /* The vertical size of the image is known in advance. The main graph area
2803 ** (Ymain) and im->yorigin must be set according to the space requirements
2804 ** of the legend and the axis labels.
2805 */
2806 if (im->extra_flags & NOLEGEND) {
2807 /* set dimensions correctly if using full size mode with no legend */
2808 im->yorigin =
2809 im->yimg -
2810 im->text_prop[TEXT_PROP_AXIS].size * 2.5 - Yspacing;
2811 Ymain = im->yorigin;
2812 } else {
2813 /* Determine where to place the legends onto the image.
2814 ** Set Ymain and adjust im->yorigin to match the space requirements.
2815 */
2816 if (leg_place(im, &Ymain) == -1)
2817 return -1;
2818 }
2821 /* remove title space *or* some padding above the graph from the main graph area */
2822 if (Ytitle) {
2823 Ymain -= Ytitle;
2824 } else {
2825 Ymain -= 1.5 * Yspacing;
2826 }
2828 /* watermark doesn't seem to effect the vertical size of the main graph area, oh well! */
2829 if (im->watermark[0] != '\0') {
2830 Ymain -= Ywatermark;
2831 }
2833 im->ysize = Ymain;
2834 } else { /* dimension options -width and -height refer to the dimensions of the main graph area */
2836 /* The actual size of the image to draw is determined from
2837 ** several sources. The size given on the command line is
2838 ** the graph area but we need more as we have to draw labels
2839 ** and other things outside the graph area.
2840 */
2842 if (im->ylegend[0] != '\0') {
2843 Xvertical = im->text_prop[TEXT_PROP_UNIT].size * 2;
2844 }
2847 if (im->title[0] != '\0') {
2848 /* The title is placed "inbetween" two text lines so it
2849 ** automatically has some vertical spacing. The horizontal
2850 ** spacing is added here, on each side.
2851 */
2852 /* don't care for the with of the title
2853 Xtitle = gfx_get_text_width(im->canvas, 0,
2854 im->text_prop[TEXT_PROP_TITLE].font,
2855 im->text_prop[TEXT_PROP_TITLE].size,
2856 im->tabwidth,
2857 im->title, 0) + 2*Xspacing; */
2858 Ytitle = im->text_prop[TEXT_PROP_TITLE].size * 2.6 + 10;
2859 }
2861 if (elements) {
2862 Xmain = im->xsize;
2863 Ymain = im->ysize;
2864 }
2865 /* Now calculate the total size. Insert some spacing where
2866 desired. im->xorigin and im->yorigin need to correspond
2867 with the lower left corner of the main graph area or, if
2868 this one is not set, the imaginary box surrounding the
2869 pie chart area. */
2871 /* The legend width cannot yet be determined, as a result we
2872 ** have problems adjusting the image to it. For now, we just
2873 ** forget about it at all; the legend will have to fit in the
2874 ** size already allocated.
2875 */
2876 im->ximg = Xylabel + Xmain + 2 * Xspacing;
2877 if (Xmain)
2878 im->ximg += Xspacing;
2879 im->xorigin = Xspacing + Xylabel;
2880 /* the length of the title should not influence with width of the graph
2881 if (Xtitle > im->ximg) im->ximg = Xtitle; */
2882 if (Xvertical) { /* unit description */
2883 im->ximg += Xvertical;
2884 im->xorigin += Xvertical;
2885 }
2886 xtr(im, 0);
2887 /* The vertical size is interesting... we need to compare
2888 ** the sum of {Ytitle, Ymain, Yxlabel, Ylegend, Ywatermark} with
2889 ** Yvertical however we need to know {Ytitle+Ymain+Yxlabel}
2890 ** in order to start even thinking about Ylegend or Ywatermark.
2891 **
2892 ** Do it in three portions: First calculate the inner part,
2893 ** then do the legend, then adjust the total height of the img,
2894 ** adding space for a watermark if one exists;
2895 */
2896 /* reserve space for main and/or pie */
2897 im->yimg = Ymain + Yxlabel;
2898 im->yorigin = im->yimg - Yxlabel;
2899 /* reserve space for the title *or* some padding above the graph */
2900 if (Ytitle) {
2901 im->yimg += Ytitle;
2902 im->yorigin += Ytitle;
2903 } else {
2904 im->yimg += 1.5 * Yspacing;
2905 im->yorigin += 1.5 * Yspacing;
2906 }
2907 /* reserve space for padding below the graph */
2908 im->yimg += Yspacing;
2909 /* Determine where to place the legends onto the image.
2910 ** Adjust im->yimg to match the space requirements.
2911 */
2912 if (leg_place(im, 0) == -1)
2913 return -1;
2914 if (im->watermark[0] != '\0') {
2915 im->yimg += Ywatermark;
2916 }
2917 }
2919 ytr(im, DNAN);
2920 return 0;
2921 }
2923 static cairo_status_t cairo_output(
2924 void *closure,
2925 const unsigned char
2926 *data,
2927 unsigned int length)
2928 {
2929 image_desc_t *im = closure;
2931 im->rendered_image =
2932 realloc(im->rendered_image, im->rendered_image_size + length);
2933 if (im->rendered_image == NULL)
2934 return CAIRO_STATUS_WRITE_ERROR;
2935 memcpy(im->rendered_image + im->rendered_image_size, data, length);
2936 im->rendered_image_size += length;
2937 return CAIRO_STATUS_SUCCESS;
2938 }
2940 /* draw that picture thing ... */
2941 int graph_paint(
2942 image_desc_t *im)
2943 {
2944 int i, ii;
2945 int lazy = lazy_check(im);
2946 double areazero = 0.0;
2947 graph_desc_t *lastgdes = NULL;
2948 infoval info;
2949 PangoFontMap *font_map = pango_cairo_font_map_get_default();
2951 /* if we are lazy and there is nothing to PRINT ... quit now */
2952 if (lazy && im->prt_c == 0)
2953 return 0;
2954 /* pull the data from the rrd files ... */
2955 if (data_fetch(im) == -1)
2956 return -1;
2957 /* evaluate VDEF and CDEF operations ... */
2958 if (data_calc(im) == -1)
2959 return -1;
2960 /* calculate and PRINT and GPRINT definitions. We have to do it at
2961 * this point because it will affect the length of the legends
2962 * if there are no graph elements we stop here ...
2963 * if we are lazy, try to quit ...
2964 */
2965 i = print_calc(im);
2966 if (i < 0)
2967 return -1;
2968 if ((i == 0) || lazy)
2969 return 0;
2970 /**************************************************************
2971 *** Calculating sizes and locations became a bit confusing ***
2972 *** so I moved this into a separate function. ***
2973 **************************************************************/
2974 if (graph_size_location(im, i) == -1)
2975 return -1;
2977 info.u_cnt = im->xorigin;
2978 grinfo_push(im, sprintf_alloc("graph_left"), RD_I_CNT, info);
2979 info.u_cnt = im->yorigin - im->ysize;
2980 grinfo_push(im, sprintf_alloc("graph_top"), RD_I_CNT, info);
2981 info.u_cnt = im->xsize;
2982 grinfo_push(im, sprintf_alloc("graph_width"), RD_I_CNT, info);
2983 info.u_cnt = im->ysize;
2984 grinfo_push(im, sprintf_alloc("graph_height"), RD_I_CNT, info);
2985 info.u_cnt = im->ximg;
2986 grinfo_push(im, sprintf_alloc("image_width"), RD_I_CNT, info);
2987 info.u_cnt = im->yimg;
2988 grinfo_push(im, sprintf_alloc("image_height"), RD_I_CNT, info);
2990 /* get actual drawing data and find min and max values */
2991 if (data_proc(im) == -1)
2992 return -1;
2993 if (!im->logarithmic) {
2994 si_unit(im);
2995 }
2997 /* identify si magnitude Kilo, Mega Giga ? */
2998 if (!im->rigid && !im->logarithmic)
2999 expand_range(im); /* make sure the upper and lower limit are
3000 sensible values */
3002 info.u_val = im->minval;
3003 grinfo_push(im, sprintf_alloc("value_min"), RD_I_VAL, info);
3004 info.u_val = im->maxval;
3005 grinfo_push(im, sprintf_alloc("value_max"), RD_I_VAL, info);
3007 if (!calc_horizontal_grid(im))
3008 return -1;
3009 /* reset precalc */
3010 ytr(im, DNAN);
3011 /* if (im->gridfit)
3012 apply_gridfit(im); */
3013 /* the actual graph is created by going through the individual
3014 graph elements and then drawing them */
3015 cairo_surface_destroy(im->surface);
3016 switch (im->imgformat) {
3017 case IF_PNG:
3018 im->surface =
3019 cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
3020 im->ximg * im->zoom,
3021 im->yimg * im->zoom);
3022 break;
3023 case IF_PDF:
3024 im->gridfit = 0;
3025 im->surface = strlen(im->graphfile)
3026 ? cairo_pdf_surface_create(im->graphfile, im->ximg * im->zoom,
3027 im->yimg * im->zoom)
3028 : cairo_pdf_surface_create_for_stream
3029 (&cairo_output, im, im->ximg * im->zoom, im->yimg * im->zoom);
3030 break;
3031 case IF_EPS:
3032 im->gridfit = 0;
3033 im->surface = strlen(im->graphfile)
3034 ?
3035 cairo_ps_surface_create(im->graphfile, im->ximg * im->zoom,
3036 im->yimg * im->zoom)
3037 : cairo_ps_surface_create_for_stream
3038 (&cairo_output, im, im->ximg * im->zoom, im->yimg * im->zoom);
3039 break;
3040 case IF_SVG:
3041 im->gridfit = 0;
3042 im->surface = strlen(im->graphfile)
3043 ?
3044 cairo_svg_surface_create(im->
3045 graphfile,
3046 im->ximg * im->zoom, im->yimg * im->zoom)
3047 : cairo_svg_surface_create_for_stream
3048 (&cairo_output, im, im->ximg * im->zoom, im->yimg * im->zoom);
3049 cairo_svg_surface_restrict_to_version
3050 (im->surface, CAIRO_SVG_VERSION_1_1);
3051 break;
3052 };
3053 im->cr = cairo_create(im->surface);
3054 cairo_set_antialias(im->cr, im->graph_antialias);
3055 cairo_scale(im->cr, im->zoom, im->zoom);
3056 pango_cairo_font_map_set_resolution(PANGO_CAIRO_FONT_MAP(font_map), 100);
3057 gfx_new_area(im, 0, 0, 0, im->yimg,
3058 im->ximg, im->yimg, im->graph_col[GRC_BACK]);
3059 gfx_add_point(im, im->ximg, 0);
3060 gfx_close_path(im);
3061 gfx_new_area(im, im->xorigin,
3062 im->yorigin,
3063 im->xorigin +
3064 im->xsize, im->yorigin,
3065 im->xorigin +
3066 im->xsize,
3067 im->yorigin - im->ysize, im->graph_col[GRC_CANVAS]);
3068 gfx_add_point(im, im->xorigin, im->yorigin - im->ysize);
3069 gfx_close_path(im);
3070 if (im->minval > 0.0)
3071 areazero = im->minval;
3072 if (im->maxval < 0.0)
3073 areazero = im->maxval;
3074 for (i = 0; i < im->gdes_c; i++) {
3075 switch (im->gdes[i].gf) {
3076 case GF_CDEF:
3077 case GF_VDEF:
3078 case GF_DEF:
3079 case GF_PRINT:
3080 case GF_GPRINT:
3081 case GF_COMMENT:
3082 case GF_TEXTALIGN:
3083 case GF_HRULE:
3084 case GF_VRULE:
3085 case GF_XPORT:
3086 case GF_SHIFT:
3087 break;
3088 case GF_TICK:
3089 for (ii = 0; ii < im->xsize; ii++) {
3090 if (!isnan(im->gdes[i].p_data[ii])
3091 && im->gdes[i].p_data[ii] != 0.0) {
3092 if (im->gdes[i].yrule > 0) {
3093 gfx_line(im,
3094 im->xorigin + ii,
3095 im->yorigin,
3096 im->xorigin + ii,
3097 im->yorigin -
3098 im->gdes[i].yrule *
3099 im->ysize, 1.0, im->gdes[i].col);
3100 } else if (im->gdes[i].yrule < 0) {
3101 gfx_line(im,
3102 im->xorigin + ii,
3103 im->yorigin - im->ysize,
3104 im->xorigin + ii,
3105 im->yorigin - (1 -
3106 im->gdes[i].
3107 yrule) *
3108 im->ysize, 1.0, im->gdes[i].col);
3109 }
3110 }
3111 }
3112 break;
3113 case GF_LINE:
3114 case GF_AREA:
3115 /* fix data points at oo and -oo */
3116 for (ii = 0; ii < im->xsize; ii++) {
3117 if (isinf(im->gdes[i].p_data[ii])) {
3118 if (im->gdes[i].p_data[ii] > 0) {
3119 im->gdes[i].p_data[ii] = im->maxval;
3120 } else {
3121 im->gdes[i].p_data[ii] = im->minval;
3122 }
3124 }
3125 } /* for */
3127 /* *******************************************************
3128 a ___. (a,t)
3129 | | ___
3130 ____| | | |
3131 | |___|
3132 -------|--t-1--t--------------------------------
3134 if we know the value at time t was a then
3135 we draw a square from t-1 to t with the value a.
3137 ********************************************************* */
3138 if (im->gdes[i].col.alpha != 0.0) {
3139 /* GF_LINE and friend */
3140 if (im->gdes[i].gf == GF_LINE) {
3141 double last_y = 0.0;
3142 int draw_on = 0;
3144 cairo_save(im->cr);
3145 cairo_new_path(im->cr);
3146 cairo_set_line_width(im->cr, im->gdes[i].linewidth);
3147 if (im->gdes[i].dash) {
3148 cairo_set_dash(im->cr,
3149 im->gdes[i].p_dashes,
3150 im->gdes[i].ndash, im->gdes[i].offset);
3151 }
3153 for (ii = 1; ii < im->xsize; ii++) {
3154 if (isnan(im->gdes[i].p_data[ii])
3155 || (im->slopemode == 1
3156 && isnan(im->gdes[i].p_data[ii - 1]))) {
3157 draw_on = 0;
3158 continue;
3159 }
3160 if (draw_on == 0) {
3161 last_y = ytr(im, im->gdes[i].p_data[ii]);
3162 if (im->slopemode == 0) {
3163 double x = ii - 1 + im->xorigin;
3164 double y = last_y;
3166 gfx_line_fit(im, &x, &y);
3167 cairo_move_to(im->cr, x, y);
3168 x = ii + im->xorigin;
3169 y = last_y;
3170 gfx_line_fit(im, &x, &y);
3171 cairo_line_to(im->cr, x, y);
3172 } else {
3173 double x = ii - 1 + im->xorigin;
3174 double y =
3175 ytr(im, im->gdes[i].p_data[ii - 1]);
3176 gfx_line_fit(im, &x, &y);
3177 cairo_move_to(im->cr, x, y);
3178 x = ii + im->xorigin;
3179 y = last_y;
3180 gfx_line_fit(im, &x, &y);
3181 cairo_line_to(im->cr, x, y);
3182 }
3183 draw_on = 1;
3184 } else {
3185 double x1 = ii + im->xorigin;
3186 double y1 = ytr(im, im->gdes[i].p_data[ii]);
3188 if (im->slopemode == 0
3189 && !AlmostEqual2sComplement(y1, last_y, 4)) {
3190 double x = ii - 1 + im->xorigin;
3191 double y = y1;
3193 gfx_line_fit(im, &x, &y);
3194 cairo_line_to(im->cr, x, y);
3195 };
3196 last_y = y1;
3197 gfx_line_fit(im, &x1, &y1);
3198 cairo_line_to(im->cr, x1, y1);
3199 };
3200 }
3201 cairo_set_source_rgba(im->cr,
3202 im->gdes[i].
3203 col.red,
3204 im->gdes[i].
3205 col.green,
3206 im->gdes[i].
3207 col.blue, im->gdes[i].col.alpha);
3208 cairo_set_line_cap(im->cr, CAIRO_LINE_CAP_ROUND);
3209 cairo_set_line_join(im->cr, CAIRO_LINE_JOIN_ROUND);
3210 cairo_stroke(im->cr);
3211 cairo_restore(im->cr);
3212 } else {
3213 int idxI = -1;
3214 double *foreY =
3215 (double *) malloc(sizeof(double) * im->xsize * 2);
3216 double *foreX =
3217 (double *) malloc(sizeof(double) * im->xsize * 2);
3218 double *backY =
3219 (double *) malloc(sizeof(double) * im->xsize * 2);
3220 double *backX =
3221 (double *) malloc(sizeof(double) * im->xsize * 2);
3222 int drawem = 0;
3224 for (ii = 0; ii <= im->xsize; ii++) {
3225 double ybase, ytop;
3227 if (idxI > 0 && (drawem != 0 || ii == im->xsize)) {
3228 int cntI = 1;
3229 int lastI = 0;
3231 while (cntI < idxI
3232 &&
3233 AlmostEqual2sComplement(foreY
3234 [lastI],
3235 foreY[cntI], 4)
3236 &&
3237 AlmostEqual2sComplement(foreY
3238 [lastI],
3239 foreY
3240 [cntI + 1], 4)) {
3241 cntI++;
3242 }
3243 gfx_new_area(im,
3244 backX[0], backY[0],
3245 foreX[0], foreY[0],
3246 foreX[cntI],
3247 foreY[cntI], im->gdes[i].col);
3248 while (cntI < idxI) {
3249 lastI = cntI;
3250 cntI++;
3251 while (cntI < idxI
3252 &&
3253 AlmostEqual2sComplement(foreY
3254 [lastI],
3255 foreY[cntI], 4)
3256 &&
3257 AlmostEqual2sComplement(foreY
3258 [lastI],
3259 foreY
3260 [cntI
3261 + 1], 4)) {
3262 cntI++;
3263 }
3264 gfx_add_point(im, foreX[cntI], foreY[cntI]);
3265 }
3266 gfx_add_point(im, backX[idxI], backY[idxI]);
3267 while (idxI > 1) {
3268 lastI = idxI;
3269 idxI--;
3270 while (idxI > 1
3271 &&
3272 AlmostEqual2sComplement(backY
3273 [lastI],
3274 backY[idxI], 4)
3275 &&
3276 AlmostEqual2sComplement(backY
3277 [lastI],
3278 backY
3279 [idxI
3280 - 1], 4)) {
3281 idxI--;
3282 }
3283 gfx_add_point(im, backX[idxI], backY[idxI]);
3284 }
3285 idxI = -1;
3286 drawem = 0;
3287 gfx_close_path(im);
3288 }
3289 if (drawem != 0) {
3290 drawem = 0;
3291 idxI = -1;
3292 }
3293 if (ii == im->xsize)
3294 break;
3295 if (im->slopemode == 0 && ii == 0) {
3296 continue;
3297 }
3298 if (isnan(im->gdes[i].p_data[ii])) {
3299 drawem = 1;
3300 continue;
3301 }
3302 ytop = ytr(im, im->gdes[i].p_data[ii]);
3303 if (lastgdes && im->gdes[i].stack) {
3304 ybase = ytr(im, lastgdes->p_data[ii]);
3305 } else {
3306 ybase = ytr(im, areazero);
3307 }
3308 if (ybase == ytop) {
3309 drawem = 1;
3310 continue;
3311 }
3313 if (ybase > ytop) {
3314 double extra = ytop;
3316 ytop = ybase;
3317 ybase = extra;
3318 }
3319 if (im->slopemode == 0) {
3320 backY[++idxI] = ybase - 0.2;
3321 backX[idxI] = ii + im->xorigin - 1;
3322 foreY[idxI] = ytop + 0.2;
3323 foreX[idxI] = ii + im->xorigin - 1;
3324 }
3325 backY[++idxI] = ybase - 0.2;
3326 backX[idxI] = ii + im->xorigin;
3327 foreY[idxI] = ytop + 0.2;
3328 foreX[idxI] = ii + im->xorigin;
3329 }
3330 /* close up any remaining area */
3331 free(foreY);
3332 free(foreX);
3333 free(backY);
3334 free(backX);
3335 } /* else GF_LINE */
3336 }
3337 /* if color != 0x0 */
3338 /* make sure we do not run into trouble when stacking on NaN */
3339 for (ii = 0; ii < im->xsize; ii++) {
3340 if (isnan(im->gdes[i].p_data[ii])) {
3341 if (lastgdes && (im->gdes[i].stack)) {
3342 im->gdes[i].p_data[ii] = lastgdes->p_data[ii];
3343 } else {
3344 im->gdes[i].p_data[ii] = areazero;
3345 }
3346 }
3347 }
3348 lastgdes = &(im->gdes[i]);
3349 break;
3350 case GF_STACK:
3351 rrd_set_error
3352 ("STACK should already be turned into LINE or AREA here");
3353 return -1;
3354 break;
3355 } /* switch */
3356 }
3358 /* grid_paint also does the text */
3359 if (!(im->extra_flags & ONLY_GRAPH))
3360 grid_paint(im);
3361 if (!(im->extra_flags & ONLY_GRAPH))
3362 axis_paint(im);
3363 /* the RULES are the last thing to paint ... */
3364 for (i = 0; i < im->gdes_c; i++) {
3366 switch (im->gdes[i].gf) {
3367 case GF_HRULE:
3368 if (im->gdes[i].yrule >= im->minval
3369 && im->gdes[i].yrule <= im->maxval) {
3370 cairo_save(im->cr);
3371 if (im->gdes[i].dash) {
3372 cairo_set_dash(im->cr,
3373 im->gdes[i].p_dashes,
3374 im->gdes[i].ndash, im->gdes[i].offset);
3375 }
3376 gfx_line(im, im->xorigin,
3377 ytr(im, im->gdes[i].yrule),
3378 im->xorigin + im->xsize,
3379 ytr(im, im->gdes[i].yrule), 1.0, im->gdes[i].col);
3380 cairo_stroke(im->cr);
3381 cairo_restore(im->cr);
3382 }
3383 break;
3384 case GF_VRULE:
3385 if (im->gdes[i].xrule >= im->start
3386 && im->gdes[i].xrule <= im->end) {
3387 cairo_save(im->cr);
3388 if (im->gdes[i].dash) {
3389 cairo_set_dash(im->cr,
3390 im->gdes[i].p_dashes,
3391 im->gdes[i].ndash, im->gdes[i].offset);
3392 }
3393 gfx_line(im,
3394 xtr(im, im->gdes[i].xrule),
3395 im->yorigin, xtr(im,
3396 im->
3397 gdes[i].
3398 xrule),
3399 im->yorigin - im->ysize, 1.0, im->gdes[i].col);
3400 cairo_stroke(im->cr);
3401 cairo_restore(im->cr);
3402 }
3403 break;
3404 default:
3405 break;
3406 }
3407 }
3410 switch (im->imgformat) {
3411 case IF_PNG:
3412 {
3413 cairo_status_t status;
3415 status = strlen(im->graphfile) ?
3416 cairo_surface_write_to_png(im->surface, im->graphfile)
3417 : cairo_surface_write_to_png_stream(im->surface, &cairo_output,
3418 im);
3420 if (status != CAIRO_STATUS_SUCCESS) {
3421 rrd_set_error("Could not save png to '%s'", im->graphfile);
3422 return 1;
3423 }
3424 break;
3425 }
3426 default:
3427 if (strlen(im->graphfile)) {
3428 cairo_show_page(im->cr);
3429 } else {
3430 cairo_surface_finish(im->surface);
3431 }
3432 break;
3433 }
3435 return 0;
3436 }
3439 /*****************************************************
3440 * graph stuff
3441 *****************************************************/
3443 int gdes_alloc(
3444 image_desc_t *im)
3445 {
3447 im->gdes_c++;
3448 if ((im->gdes = (graph_desc_t *)
3449 rrd_realloc(im->gdes, (im->gdes_c)
3450 * sizeof(graph_desc_t))) == NULL) {
3451 rrd_set_error("realloc graph_descs");
3452 return -1;
3453 }
3456 im->gdes[im->gdes_c - 1].step = im->step;
3457 im->gdes[im->gdes_c - 1].step_orig = im->step;
3458 im->gdes[im->gdes_c - 1].stack = 0;
3459 im->gdes[im->gdes_c - 1].linewidth = 0;
3460 im->gdes[im->gdes_c - 1].debug = 0;
3461 im->gdes[im->gdes_c - 1].start = im->start;
3462 im->gdes[im->gdes_c - 1].start_orig = im->start;
3463 im->gdes[im->gdes_c - 1].end = im->end;
3464 im->gdes[im->gdes_c - 1].end_orig = im->end;
3465 im->gdes[im->gdes_c - 1].vname[0] = '\0';
3466 im->gdes[im->gdes_c - 1].data = NULL;
3467 im->gdes[im->gdes_c - 1].ds_namv = NULL;
3468 im->gdes[im->gdes_c - 1].data_first = 0;
3469 im->gdes[im->gdes_c - 1].p_data = NULL;
3470 im->gdes[im->gdes_c - 1].rpnp = NULL;
3471 im->gdes[im->gdes_c - 1].p_dashes = NULL;
3472 im->gdes[im->gdes_c - 1].shift = 0.0;
3473 im->gdes[im->gdes_c - 1].dash = 0;
3474 im->gdes[im->gdes_c - 1].ndash = 0;
3475 im->gdes[im->gdes_c - 1].offset = 0;
3476 im->gdes[im->gdes_c - 1].col.red = 0.0;
3477 im->gdes[im->gdes_c - 1].col.green = 0.0;
3478 im->gdes[im->gdes_c - 1].col.blue = 0.0;
3479 im->gdes[im->gdes_c - 1].col.alpha = 0.0;
3480 im->gdes[im->gdes_c - 1].legend[0] = '\0';
3481 im->gdes[im->gdes_c - 1].format[0] = '\0';
3482 im->gdes[im->gdes_c - 1].strftm = 0;
3483 im->gdes[im->gdes_c - 1].rrd[0] = '\0';
3484 im->gdes[im->gdes_c - 1].ds = -1;
3485 im->gdes[im->gdes_c - 1].cf_reduce = CF_AVERAGE;
3486 im->gdes[im->gdes_c - 1].cf = CF_AVERAGE;
3487 im->gdes[im->gdes_c - 1].yrule = DNAN;
3488 im->gdes[im->gdes_c - 1].xrule = 0;
3489 return 0;
3490 }
3492 /* copies input untill the first unescaped colon is found
3493 or until input ends. backslashes have to be escaped as well */
3494 int scan_for_col(
3495 const char *const input,
3496 int len,
3497 char *const output)
3498 {
3499 int inp, outp = 0;
3501 for (inp = 0; inp < len && input[inp] != ':' && input[inp] != '\0'; inp++) {
3502 if (input[inp] == '\\'
3503 && input[inp + 1] != '\0'
3504 && (input[inp + 1] == '\\' || input[inp + 1] == ':')) {
3505 output[outp++] = input[++inp];
3506 } else {
3507 output[outp++] = input[inp];
3508 }
3509 }
3510 output[outp] = '\0';
3511 return inp;
3512 }
3514 /* Now just a wrapper around rrd_graph_v */
3515 int rrd_graph(
3516 int argc,
3517 char **argv,
3518 char ***prdata,
3519 int *xsize,
3520 int *ysize,
3521 FILE * stream,
3522 double *ymin,
3523 double *ymax)
3524 {
3525 int prlines = 0;
3526 info_t *grinfo = NULL;
3527 info_t *walker;
3529 grinfo = rrd_graph_v(argc, argv);
3530 if (grinfo == NULL)
3531 return -1;
3532 walker = grinfo;
3533 (*prdata) = NULL;
3534 while (walker) {
3535 if (strcmp(walker->key, "image_info") == 0) {
3536 prlines++;
3537 if (((*prdata) =
3538 rrd_realloc((*prdata),
3539 (prlines + 1) * sizeof(char *))) == NULL) {
3540 rrd_set_error("realloc prdata");
3541 return 0;
3542 }
3543 /* imginfo goes to position 0 in the prdata array */
3544 (*prdata)[prlines - 1] = malloc((strlen(walker->value.u_str)
3545 + 2) * sizeof(char));
3546 strcpy((*prdata)[prlines - 1], walker->value.u_str);
3547 (*prdata)[prlines] = NULL;
3548 }
3549 /* skip anything else */
3550 walker = walker->next;
3551 }
3552 walker = grinfo;
3553 while (walker) {
3554 if (strcmp(walker->key, "image_width") == 0) {
3555 *xsize = walker->value.u_int;
3556 } else if (strcmp(walker->key, "image_height") == 0) {
3557 *ysize = walker->value.u_int;
3558 } else if (strcmp(walker->key, "value_min") == 0) {
3559 *ymin = walker->value.u_val;
3560 } else if (strcmp(walker->key, "value_max") == 0) {
3561 *ymax = walker->value.u_val;
3562 } else if (strncmp(walker->key, "print", 5) == 0) { /* keys are prdate[0..] */
3563 prlines++;
3564 if (((*prdata) =
3565 rrd_realloc((*prdata),
3566 (prlines + 1) * sizeof(char *))) == NULL) {
3567 rrd_set_error("realloc prdata");
3568 return 0;
3569 }
3570 (*prdata)[prlines - 1] = malloc((strlen(walker->value.u_str)
3571 + 2) * sizeof(char));
3572 (*prdata)[prlines] = NULL;
3573 strcpy((*prdata)[prlines - 1], walker->value.u_str);
3574 } else if (strcmp(walker->key, "image") == 0) {
3575 fwrite(walker->value.u_blo.ptr, walker->value.u_blo.size, 1,
3576 (stream ? stream : stdout));
3577 }
3578 /* skip anything else */
3579 walker = walker->next;
3580 }
3581 info_free(grinfo);
3582 return 0;
3583 }
3586 /* Some surgery done on this function, it became ridiculously big.
3587 ** Things moved:
3588 ** - initializing now in rrd_graph_init()
3589 ** - options parsing now in rrd_graph_options()
3590 ** - script parsing now in rrd_graph_script()
3591 */
3592 info_t *rrd_graph_v(
3593 int argc,
3594 char **argv)
3595 {
3596 image_desc_t im;
3597 info_t *grinfo;
3599 rrd_graph_init(&im);
3600 /* a dummy surface so that we can measure text sizes for placements */
3601 im.surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, 10, 10);
3602 im.cr = cairo_create(im.surface);
3603 rrd_graph_options(argc, argv, &im);
3604 if (rrd_test_error()) {
3605 info_free(im.grinfo);
3606 im_free(&im);
3607 return NULL;
3608 }
3610 if (optind >= argc) {
3611 info_free(im.grinfo);
3612 im_free(&im);
3613 rrd_set_error("missing filename");
3614 return NULL;
3615 }
3617 if (strlen(argv[optind]) >= MAXPATH) {
3618 rrd_set_error("filename (including path) too long");
3619 info_free(im.grinfo);
3620 im_free(&im);
3621 return NULL;
3622 }
3624 strncpy(im.graphfile, argv[optind], MAXPATH - 1);
3625 im.graphfile[MAXPATH - 1] = '\0';
3627 if (strcmp(im.graphfile, "-") == 0) {
3628 im.graphfile[0] = '\0';
3629 }
3631 rrd_graph_script(argc, argv, &im, 1);
3632 if (rrd_test_error()) {
3633 info_free(im.grinfo);
3634 im_free(&im);
3635 return NULL;
3636 }
3638 /* Everything is now read and the actual work can start */
3640 if (graph_paint(&im) == -1) {
3641 info_free(im.grinfo);
3642 im_free(&im);
3643 return NULL;
3644 }
3647 /* The image is generated and needs to be output.
3648 ** Also, if needed, print a line with information about the image.
3649 */
3651 if (im.imginfo) {
3652 infoval info;
3654 info.u_str =
3655 sprintf_alloc(im.imginfo,
3656 im.graphfile,
3657 (long) (im.zoom *
3658 im.ximg), (long) (im.zoom * im.yimg));
3659 grinfo_push(&im, sprintf_alloc("image_info"), RD_I_STR, info);
3660 free(info.u_str);
3661 }
3662 if (im.rendered_image) {
3663 infoval img;
3665 img.u_blo.size = im.rendered_image_size;
3666 img.u_blo.ptr = im.rendered_image;
3667 grinfo_push(&im, sprintf_alloc("image"), RD_I_BLO, img);
3668 }
3669 grinfo = im.grinfo;
3670 im_free(&im);
3671 return grinfo;
3672 }
3674 void rrd_graph_init(
3675 image_desc_t
3676 *im)
3677 {
3678 unsigned int i;
3680 #ifdef HAVE_TZSET
3681 tzset();
3682 #endif
3683 #ifdef HAVE_SETLOCALE
3684 setlocale(LC_TIME, "");
3685 #ifdef HAVE_MBSTOWCS
3686 setlocale(LC_CTYPE, "");
3687 #endif
3688 #endif
3689 im->base = 1000;
3690 im->cr = NULL;
3691 im->draw_x_grid = 1;
3692 im->draw_y_grid = 1;
3693 im->extra_flags = 0;
3694 im->font_options = cairo_font_options_create();
3695 im->forceleftspace = 0;
3696 im->gdes_c = 0;
3697 im->gdes = NULL;
3698 im->graph_antialias = CAIRO_ANTIALIAS_GRAY;
3699 im->grid_dash_off = 1;
3700 im->grid_dash_on = 1;
3701 im->gridfit = 1;
3702 im->grinfo = (info_t *) NULL;
3703 im->grinfo_current = (info_t *) NULL;
3704 im->imgformat = IF_PNG;
3705 im->imginfo = NULL;
3706 im->lazy = 0;
3707 im->logarithmic = 0;
3708 im->maxval = DNAN;
3709 im->minval = 0;
3710 im->minval = DNAN;
3711 im->prt_c = 0;
3712 im->rigid = 0;
3713 im->rendered_image_size = 0;
3714 im->rendered_image = NULL;
3715 im->slopemode = 0;
3716 im->step = 0;
3717 im->surface = NULL;
3718 im->symbol = ' ';
3719 im->tabwidth = 40.0;
3720 im->title[0] = '\0';
3721 im->unitsexponent = 9999;
3722 im->unitslength = 6;
3723 im->viewfactor = 1.0;
3724 im->watermark[0] = '\0';
3725 im->ximg = 0;
3726 im->xlab_user.minsec = -1;
3727 im->xorigin = 0;
3728 im->xsize = 400;
3729 im->ygridstep = DNAN;
3730 im->yimg = 0;
3731 im->ylegend[0] = '\0';
3732 im->yorigin = 0;
3733 im->ysize = 100;
3734 im->zoom = 1;
3735 cairo_font_options_set_hint_style
3736 (im->font_options, CAIRO_HINT_STYLE_FULL);
3737 cairo_font_options_set_hint_metrics
3738 (im->font_options, CAIRO_HINT_METRICS_ON);
3739 cairo_font_options_set_antialias(im->font_options, CAIRO_ANTIALIAS_GRAY);
3740 for (i = 0; i < DIM(graph_col); i++)
3741 im->graph_col[i] = graph_col[i];
3742 #if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
3743 {
3744 char *windir;
3745 char rrd_win_default_font[1000];
3747 windir = getenv("windir");
3748 /* %windir% is something like D:\windows or C:\winnt */
3749 if (windir != NULL) {
3750 strncpy(rrd_win_default_font, windir, 500);
3751 rrd_win_default_font[500] = '\0';
3752 strcat(rrd_win_default_font, "\\fonts\\");
3753 strcat(rrd_win_default_font, RRD_DEFAULT_FONT);
3754 for (i = 0; i < DIM(text_prop); i++) {
3755 strncpy(text_prop[i].font,
3756 rrd_win_default_font, sizeof(text_prop[i].font) - 1);
3757 text_prop[i].font[sizeof(text_prop[i].font) - 1] = '\0';
3758 }
3759 }
3760 }
3761 #endif
3762 {
3763 char *deffont;
3765 deffont = getenv("RRD_DEFAULT_FONT");
3766 if (deffont != NULL) {
3767 for (i = 0; i < DIM(text_prop); i++) {
3768 strncpy(text_prop[i].font, deffont,
3769 sizeof(text_prop[i].font) - 1);
3770 text_prop[i].font[sizeof(text_prop[i].font) - 1] = '\0';
3771 }
3772 }
3773 }
3774 for (i = 0; i < DIM(text_prop); i++) {
3775 im->text_prop[i].size = text_prop[i].size;
3776 strcpy(im->text_prop[i].font, text_prop[i].font);
3777 }
3778 }
3780 void rrd_graph_options(
3781 int argc,
3782 char *argv[],
3783 image_desc_t
3784 *im)
3785 {
3786 int stroff;
3787 char *parsetime_error = NULL;
3788 char scan_gtm[12], scan_mtm[12], scan_ltm[12], col_nam[12];
3789 time_t start_tmp = 0, end_tmp = 0;
3790 long long_tmp;
3791 struct rrd_time_value start_tv, end_tv;
3792 long unsigned int color;
3793 char *old_locale = "";
3795 /* defines for long options without a short equivalent. should be bytes,
3796 and may not collide with (the ASCII value of) short options */
3797 #define LONGOPT_UNITS_SI 255
3798 struct option long_options[] = {
3799 {
3800 "start", required_argument, 0, 's'}, {
3801 "end", required_argument, 0,
3802 'e'}, {
3803 "x-grid",
3804 required_argument, 0,
3805 'x'}, {
3806 "y-grid",
3807 required_argument,
3808 0, 'y'}, {
3809 "vertical-label",
3810 required_argument,
3811 0,
3812 'v'}, {
3813 "width",
3814 required_argument,
3815 0,
3816 'w'},
3817 {
3818 "height", required_argument, 0, 'h'}, {
3819 "full-size-mode", no_argument,
3820 0, 'D'}, {
3821 "interlaced",
3822 no_argument, 0,
3823 'i'}, {
3824 "upper-limit",
3825 required_argument,
3826 0,
3827 'u'}, {
3828 "lower-limit",
3829 required_argument,
3830 0,
3831 'l'}, {
3832 "rigid",
3833 no_argument,
3834 0,
3835 'r'},
3836 {
3837 "base", required_argument, 0, 'b'}, {
3838 "logarithmic", no_argument, 0,
3839 'o'}, {
3840 "color",
3841 required_argument, 0,
3842 'c'}, {
3843 "font",
3844 required_argument,
3845 0, 'n'}, {
3846 "title",
3847 required_argument,
3848 0, 't'},
3849 {
3850 "imginfo", required_argument, 0, 'f'}, {
3851 "imgformat",
3852 required_argument, 0, 'a'}, {
3853 "lazy",
3854 no_argument,
3855 0,
3856 'z'},
3857 {
3858 "zoom", required_argument, 0, 'm'}, {
3859 "no-legend", no_argument, 0,
3860 'g'}, {
3861 "force-rules-legend",
3862 no_argument,
3863 0, 'F'}, {
3864 "only-graph",
3865 no_argument, 0,
3866 'j'}, {
3867 "alt-y-grid",
3868 no_argument,
3869 0, 'Y'},
3870 {
3871 "no-minor", no_argument, 0, 'I'}, {
3872 "slope-mode", no_argument, 0,
3873 'E'}, {
3874 "alt-autoscale",
3875 no_argument, 0, 'A'}, {
3876 "alt-autoscale-min",
3877 no_argument,
3878 0,
3879 'J'}, {
3880 "alt-autoscale-max",
3881 no_argument,
3882 0,
3883 'M'}, {
3884 "no-gridfit",
3885 no_argument,
3886 0,
3887 'N'},
3888 {
3889 "units-exponent", required_argument,
3890 0, 'X'}, {
3891 "units-length", required_argument,
3892 0, 'L'}, {
3893 "units", required_argument, 0,
3894 LONGOPT_UNITS_SI}, {
3895 "step", required_argument, 0,
3896 'S'}, {
3897 "tabwidth",
3898 required_argument, 0,
3899 'T'}, {
3900 "font-render-mode",
3901 required_argument,
3902 0, 'R'}, {
3903 "graph-render-mode",
3904 required_argument,
3905 0,
3906 'G'},
3907 {
3908 "font-smoothing-threshold",
3909 required_argument, 0, 'B'}, {
3910 "watermark", required_argument, 0, 'W'}, {
3911 "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 */
3912 {
3913 0, 0, 0, 0}
3914 };
3915 optind = 0;
3916 opterr = 0; /* initialize getopt */
3917 parsetime("end-24h", &start_tv);
3918 parsetime("now", &end_tv);
3919 while (1) {
3920 int option_index = 0;
3921 int opt;
3922 int col_start, col_end;
3924 opt = getopt_long(argc, argv,
3925 "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",
3926 long_options, &option_index);
3927 if (opt == EOF)
3928 break;
3929 switch (opt) {
3930 case 'I':
3931 im->extra_flags |= NOMINOR;
3932 break;
3933 case 'Y':
3934 im->extra_flags |= ALTYGRID;
3935 break;
3936 case 'A':
3937 im->extra_flags |= ALTAUTOSCALE;
3938 break;
3939 case 'J':
3940 im->extra_flags |= ALTAUTOSCALE_MIN;
3941 break;
3942 case 'M':
3943 im->extra_flags |= ALTAUTOSCALE_MAX;
3944 break;
3945 case 'j':
3946 im->extra_flags |= ONLY_GRAPH;
3947 break;
3948 case 'g':
3949 im->extra_flags |= NOLEGEND;
3950 break;
3951 case 'F':
3952 im->extra_flags |= FORCE_RULES_LEGEND;
3953 break;
3954 case LONGOPT_UNITS_SI:
3955 if (im->extra_flags & FORCE_UNITS) {
3956 rrd_set_error("--units can only be used once!");
3957 setlocale(LC_NUMERIC, old_locale);
3958 return;
3959 }
3960 if (strcmp(optarg, "si") == 0)
3961 im->extra_flags |= FORCE_UNITS_SI;
3962 else {
3963 rrd_set_error("invalid argument for --units: %s", optarg);
3964 return;
3965 }
3966 break;
3967 case 'X':
3968 im->unitsexponent = atoi(optarg);
3969 break;
3970 case 'L':
3971 im->unitslength = atoi(optarg);
3972 im->forceleftspace = 1;
3973 break;
3974 case 'T':
3975 old_locale = setlocale(LC_NUMERIC, "C");
3976 im->tabwidth = atof(optarg);
3977 setlocale(LC_NUMERIC, old_locale);
3978 break;
3979 case 'S':
3980 old_locale = setlocale(LC_NUMERIC, "C");
3981 im->step = atoi(optarg);
3982 setlocale(LC_NUMERIC, old_locale);
3983 break;
3984 case 'N':
3985 im->gridfit = 0;
3986 break;
3987 case 's':
3988 if ((parsetime_error = parsetime(optarg, &start_tv))) {
3989 rrd_set_error("start time: %s", parsetime_error);
3990 return;
3991 }
3992 break;
3993 case 'e':
3994 if ((parsetime_error = parsetime(optarg, &end_tv))) {
3995 rrd_set_error("end time: %s", parsetime_error);
3996 return;
3997 }
3998 break;
3999 case 'x':
4000 if (strcmp(optarg, "none") == 0) {
4001 im->draw_x_grid = 0;
4002 break;
4003 };
4004 if (sscanf(optarg,
4005 "%10[A-Z]:%ld:%10[A-Z]:%ld:%10[A-Z]:%ld:%ld:%n",
4006 scan_gtm,
4007 &im->xlab_user.gridst,
4008 scan_mtm,
4009 &im->xlab_user.mgridst,
4010 scan_ltm,
4011 &im->xlab_user.labst,
4012 &im->xlab_user.precis, &stroff) == 7 && stroff != 0) {
4013 strncpy(im->xlab_form, optarg + stroff,
4014 sizeof(im->xlab_form) - 1);
4015 im->xlab_form[sizeof(im->xlab_form) - 1] = '\0';
4016 if ((int)
4017 (im->xlab_user.gridtm = tmt_conv(scan_gtm)) == -1) {
4018 rrd_set_error("unknown keyword %s", scan_gtm);
4019 return;
4020 } else if ((int)
4021 (im->xlab_user.mgridtm = tmt_conv(scan_mtm))
4022 == -1) {
4023 rrd_set_error("unknown keyword %s", scan_mtm);
4024 return;
4025 } else if ((int)
4026 (im->xlab_user.labtm = tmt_conv(scan_ltm)) == -1) {
4027 rrd_set_error("unknown keyword %s", scan_ltm);
4028 return;
4029 }
4030 im->xlab_user.minsec = 1;
4031 im->xlab_user.stst = im->xlab_form;
4032 } else {
4033 rrd_set_error("invalid x-grid format");
4034 return;
4035 }
4036 break;
4037 case 'y':
4039 if (strcmp(optarg, "none") == 0) {
4040 im->draw_y_grid = 0;
4041 break;
4042 };
4043 old_locale = setlocale(LC_NUMERIC, "C");
4044 if (sscanf(optarg, "%lf:%d", &im->ygridstep, &im->ylabfact) == 2) {
4045 setlocale(LC_NUMERIC, old_locale);
4046 if (im->ygridstep <= 0) {
4047 rrd_set_error("grid step must be > 0");
4048 return;
4049 } else if (im->ylabfact < 1) {
4050 rrd_set_error("label factor must be > 0");
4051 return;
4052 }
4053 } else {
4054 setlocale(LC_NUMERIC, old_locale);
4055 rrd_set_error("invalid y-grid format");
4056 return;
4057 }
4058 break;
4059 case 'v':
4060 strncpy(im->ylegend, optarg, 150);
4061 im->ylegend[150] = '\0';
4062 break;
4063 case 'u':
4064 old_locale = setlocale(LC_NUMERIC, "C");
4065 im->maxval = atof(optarg);
4066 setlocale(LC_NUMERIC, old_locale);
4067 break;
4068 case 'l':
4069 old_locale = setlocale(LC_NUMERIC, "C");
4070 im->minval = atof(optarg);
4071 setlocale(LC_NUMERIC, old_locale);
4072 break;
4073 case 'b':
4074 im->base = atol(optarg);
4075 if (im->base != 1024 && im->base != 1000) {
4076 rrd_set_error
4077 ("the only sensible value for base apart from 1000 is 1024");
4078 return;
4079 }
4080 break;
4081 case 'w':
4082 long_tmp = atol(optarg);
4083 if (long_tmp < 10) {
4084 rrd_set_error("width below 10 pixels");
4085 return;
4086 }
4087 im->xsize = long_tmp;
4088 break;
4089 case 'h':
4090 long_tmp = atol(optarg);
4091 if (long_tmp < 10) {
4092 rrd_set_error("height below 10 pixels");
4093 return;
4094 }
4095 im->ysize = long_tmp;
4096 break;
4097 case 'D':
4098 im->extra_flags |= FULL_SIZE_MODE;
4099 break;
4100 case 'i':
4101 /* interlaced png not supported at the moment */
4102 break;
4103 case 'r':
4104 im->rigid = 1;
4105 break;
4106 case 'f':
4107 im->imginfo = optarg;
4108 break;
4109 case 'a':
4110 if ((int)
4111 (im->imgformat = if_conv(optarg)) == -1) {
4112 rrd_set_error("unsupported graphics format '%s'", optarg);
4113 return;
4114 }
4115 break;
4116 case 'z':
4117 im->lazy = 1;
4118 break;
4119 case 'E':
4120 im->slopemode = 1;
4121 break;
4122 case 'o':
4123 im->logarithmic = 1;
4124 break;
4125 case 'c':
4126 if (sscanf(optarg,
4127 "%10[A-Z]#%n%8lx%n",
4128 col_nam, &col_start, &color, &col_end) == 2) {
4129 int ci;
4130 int col_len = col_end - col_start;
4132 switch (col_len) {
4133 case 3:
4134 color =
4135 (((color & 0xF00) * 0x110000) | ((color & 0x0F0) *
4136 0x011000) |
4137 ((color & 0x00F)
4138 * 0x001100)
4139 | 0x000000FF);
4140 break;
4141 case 4:
4142 color =
4143 (((color & 0xF000) *
4144 0x11000) | ((color & 0x0F00) *
4145 0x01100) | ((color &
4146 0x00F0) *
4147 0x00110) |
4148 ((color & 0x000F) * 0x00011)
4149 );
4150 break;
4151 case 6:
4152 color = (color << 8) + 0xff /* shift left by 8 */ ;
4153 break;
4154 case 8:
4155 break;
4156 default:
4157 rrd_set_error("the color format is #RRGGBB[AA]");
4158 return;
4159 }
4160 if ((ci = grc_conv(col_nam)) != -1) {
4161 im->graph_col[ci] = gfx_hex_to_col(color);
4162 } else {
4163 rrd_set_error("invalid color name '%s'", col_nam);
4164 return;
4165 }
4166 } else {
4167 rrd_set_error("invalid color def format");
4168 return;
4169 }
4170 break;
4171 case 'n':{
4172 char prop[15];
4173 double size = 1;
4174 int end;
4176 old_locale = setlocale(LC_NUMERIC, "C");
4177 if (sscanf(optarg, "%10[A-Z]:%lf%n", prop, &size, &end) >= 2) {
4178 int sindex, propidx;
4180 setlocale(LC_NUMERIC, old_locale);
4181 if ((sindex = text_prop_conv(prop)) != -1) {
4182 for (propidx = sindex;
4183 propidx < TEXT_PROP_LAST; propidx++) {
4184 if (size > 0) {
4185 im->text_prop[propidx].size = size;
4186 }
4187 if ((int) strlen(prop) > end) {
4188 if (prop[end] == ':') {
4189 strncpy(im->text_prop[propidx].font,
4190 prop + end + 1, 255);
4191 im->text_prop[propidx].font[255] = '\0';
4192 } else {
4193 rrd_set_error
4194 ("expected after font size in '%s'",
4195 prop);
4196 return;
4197 }
4198 }
4199 if (propidx == sindex && sindex != 0)
4200 break;
4201 }
4202 } else {
4203 rrd_set_error("invalid fonttag '%s'", prop);
4204 return;
4205 }
4206 } else {
4207 setlocale(LC_NUMERIC, old_locale);
4208 rrd_set_error("invalid text property format");
4209 return;
4210 }
4211 break;
4212 }
4213 case 'm':
4214 old_locale = setlocale(LC_NUMERIC, "C");
4215 im->zoom = atof(optarg);
4216 setlocale(LC_NUMERIC, old_locale);
4217 if (im->zoom <= 0.0) {
4218 rrd_set_error("zoom factor must be > 0");
4219 return;
4220 }
4221 break;
4222 case 't':
4223 strncpy(im->title, optarg, 150);
4224 im->title[150] = '\0';
4225 break;
4226 case 'R':
4227 if (strcmp(optarg, "normal") == 0) {
4228 cairo_font_options_set_antialias
4229 (im->font_options, CAIRO_ANTIALIAS_GRAY);
4230 cairo_font_options_set_hint_style
4231 (im->font_options, CAIRO_HINT_STYLE_FULL);
4232 } else if (strcmp(optarg, "light") == 0) {
4233 cairo_font_options_set_antialias
4234 (im->font_options, CAIRO_ANTIALIAS_GRAY);
4235 cairo_font_options_set_hint_style
4236 (im->font_options, CAIRO_HINT_STYLE_SLIGHT);
4237 } else if (strcmp(optarg, "mono") == 0) {
4238 cairo_font_options_set_antialias
4239 (im->font_options, CAIRO_ANTIALIAS_NONE);
4240 cairo_font_options_set_hint_style
4241 (im->font_options, CAIRO_HINT_STYLE_FULL);
4242 } else {
4243 rrd_set_error("unknown font-render-mode '%s'", optarg);
4244 return;
4245 }
4246 break;
4247 case 'G':
4248 if (strcmp(optarg, "normal") == 0)
4249 im->graph_antialias = CAIRO_ANTIALIAS_GRAY;
4250 else if (strcmp(optarg, "mono") == 0)
4251 im->graph_antialias = CAIRO_ANTIALIAS_NONE;
4252 else {
4253 rrd_set_error("unknown graph-render-mode '%s'", optarg);
4254 return;
4255 }
4256 break;
4257 case 'B':
4258 /* not supported curently */
4259 break;
4260 case 'W':
4261 strncpy(im->watermark, optarg, 100);
4262 im->watermark[99] = '\0';
4263 break;
4264 case '?':
4265 if (optopt != 0)
4266 rrd_set_error("unknown option '%c'", optopt);
4267 else
4268 rrd_set_error("unknown option '%s'", argv[optind - 1]);
4269 return;
4270 }
4271 }
4273 if (im->logarithmic && im->minval <= 0) {
4274 rrd_set_error
4275 ("for a logarithmic yaxis you must specify a lower-limit > 0");
4276 return;
4277 }
4279 if (proc_start_end(&start_tv, &end_tv, &start_tmp, &end_tmp) == -1) {
4280 /* error string is set in parsetime.c */
4281 return;
4282 }
4284 if (start_tmp < 3600 * 24 * 365 * 10) {
4285 rrd_set_error
4286 ("the first entry to fetch should be after 1980 (%ld)",
4287 start_tmp);
4288 return;
4289 }
4291 if (end_tmp < start_tmp) {
4292 rrd_set_error
4293 ("start (%ld) should be less than end (%ld)", start_tmp, end_tmp);
4294 return;
4295 }
4297 im->start = start_tmp;
4298 im->end = end_tmp;
4299 im->step = max((long) im->step, (im->end - im->start) / im->xsize);
4300 }
4302 int rrd_graph_color(
4303 image_desc_t
4304 *im,
4305 char *var,
4306 char *err,
4307 int optional)
4308 {
4309 char *color;
4310 graph_desc_t *gdp = &im->gdes[im->gdes_c - 1];
4312 color = strstr(var, "#");
4313 if (color == NULL) {
4314 if (optional == 0) {
4315 rrd_set_error("Found no color in %s", err);
4316 return 0;
4317 }
4318 return 0;
4319 } else {
4320 int n = 0;
4321 char *rest;
4322 long unsigned int col;
4324 rest = strstr(color, ":");
4325 if (rest != NULL)
4326 n = rest - color;
4327 else
4328 n = strlen(color);
4329 switch (n) {
4330 case 7:
4331 sscanf(color, "#%6lx%n", &col, &n);
4332 col = (col << 8) + 0xff /* shift left by 8 */ ;
4333 if (n != 7)
4334 rrd_set_error("Color problem in %s", err);
4335 break;
4336 case 9:
4337 sscanf(color, "#%8lx%n", &col, &n);
4338 if (n == 9)
4339 break;
4340 default:
4341 rrd_set_error("Color problem in %s", err);
4342 }
4343 if (rrd_test_error())
4344 return 0;
4345 gdp->col = gfx_hex_to_col(col);
4346 return n;
4347 }
4348 }
4351 int bad_format(
4352 char *fmt)
4353 {
4354 char *ptr;
4355 int n = 0;
4357 ptr = fmt;
4358 while (*ptr != '\0')
4359 if (*ptr++ == '%') {
4361 /* line cannot end with percent char */
4362 if (*ptr == '\0')
4363 return 1;
4364 /* '%s', '%S' and '%%' are allowed */
4365 if (*ptr == 's' || *ptr == 'S' || *ptr == '%')
4366 ptr++;
4367 /* %c is allowed (but use only with vdef!) */
4368 else if (*ptr == 'c') {
4369 ptr++;
4370 n = 1;
4371 }
4373 /* or else '% 6.2lf' and such are allowed */
4374 else {
4375 /* optional padding character */
4376 if (*ptr == ' ' || *ptr == '+' || *ptr == '-')
4377 ptr++;
4378 /* This should take care of 'm.n' with all three optional */
4379 while (*ptr >= '0' && *ptr <= '9')
4380 ptr++;
4381 if (*ptr == '.')
4382 ptr++;
4383 while (*ptr >= '0' && *ptr <= '9')
4384 ptr++;
4385 /* Either 'le', 'lf' or 'lg' must follow here */
4386 if (*ptr++ != 'l')
4387 return 1;
4388 if (*ptr == 'e' || *ptr == 'f' || *ptr == 'g')
4389 ptr++;
4390 else
4391 return 1;
4392 n++;
4393 }
4394 }
4396 return (n != 1);
4397 }
4400 int vdef_parse(
4401 struct graph_desc_t
4402 *gdes,
4403 const char *const str)
4404 {
4405 /* A VDEF currently is either "func" or "param,func"
4406 * so the parsing is rather simple. Change if needed.
4407 */
4408 double param;
4409 char func[30];
4410 int n;
4411 char *old_locale;
4413 n = 0;
4414 old_locale = setlocale(LC_NUMERIC, "C");
4415 sscanf(str, "%le,%29[A-Z]%n", ¶m, func, &n);
4416 setlocale(LC_NUMERIC, old_locale);
4417 if (n == (int) strlen(str)) { /* matched */
4418 ;
4419 } else {
4420 n = 0;
4421 sscanf(str, "%29[A-Z]%n", func, &n);
4422 if (n == (int) strlen(str)) { /* matched */
4423 param = DNAN;
4424 } else {
4425 rrd_set_error
4426 ("Unknown function string '%s' in VDEF '%s'",
4427 str, gdes->vname);
4428 return -1;
4429 }
4430 }
4431 if (!strcmp("PERCENT", func))
4432 gdes->vf.op = VDEF_PERCENT;
4433 else if (!strcmp("MAXIMUM", func))
4434 gdes->vf.op = VDEF_MAXIMUM;
4435 else if (!strcmp("AVERAGE", func))
4436 gdes->vf.op = VDEF_AVERAGE;
4437 else if (!strcmp("STDEV", func))
4438 gdes->vf.op = VDEF_STDEV;
4439 else if (!strcmp("MINIMUM", func))
4440 gdes->vf.op = VDEF_MINIMUM;
4441 else if (!strcmp("TOTAL", func))
4442 gdes->vf.op = VDEF_TOTAL;
4443 else if (!strcmp("FIRST", func))
4444 gdes->vf.op = VDEF_FIRST;
4445 else if (!strcmp("LAST", func))
4446 gdes->vf.op = VDEF_LAST;
4447 else if (!strcmp("LSLSLOPE", func))
4448 gdes->vf.op = VDEF_LSLSLOPE;
4449 else if (!strcmp("LSLINT", func))
4450 gdes->vf.op = VDEF_LSLINT;
4451 else if (!strcmp("LSLCORREL", func))
4452 gdes->vf.op = VDEF_LSLCORREL;
4453 else {
4454 rrd_set_error
4455 ("Unknown function '%s' in VDEF '%s'\n", func, gdes->vname);
4456 return -1;
4457 };
4458 switch (gdes->vf.op) {
4459 case VDEF_PERCENT:
4460 if (isnan(param)) { /* no parameter given */
4461 rrd_set_error
4462 ("Function '%s' needs parameter in VDEF '%s'\n",
4463 func, gdes->vname);
4464 return -1;
4465 };
4466 if (param >= 0.0 && param <= 100.0) {
4467 gdes->vf.param = param;
4468 gdes->vf.val = DNAN; /* undefined */
4469 gdes->vf.when = 0; /* undefined */
4470 } else {
4471 rrd_set_error
4472 ("Parameter '%f' out of range in VDEF '%s'\n",
4473 param, gdes->vname);
4474 return -1;
4475 };
4476 break;
4477 case VDEF_MAXIMUM:
4478 case VDEF_AVERAGE:
4479 case VDEF_STDEV:
4480 case VDEF_MINIMUM:
4481 case VDEF_TOTAL:
4482 case VDEF_FIRST:
4483 case VDEF_LAST:
4484 case VDEF_LSLSLOPE:
4485 case VDEF_LSLINT:
4486 case VDEF_LSLCORREL:
4487 if (isnan(param)) {
4488 gdes->vf.param = DNAN;
4489 gdes->vf.val = DNAN;
4490 gdes->vf.when = 0;
4491 } else {
4492 rrd_set_error
4493 ("Function '%s' needs no parameter in VDEF '%s'\n",
4494 func, gdes->vname);
4495 return -1;
4496 };
4497 break;
4498 };
4499 return 0;
4500 }
4503 int vdef_calc(
4504 image_desc_t *im,
4505 int gdi)
4506 {
4507 graph_desc_t *src, *dst;
4508 rrd_value_t *data;
4509 long step, steps;
4511 dst = &im->gdes[gdi];
4512 src = &im->gdes[dst->vidx];
4513 data = src->data + src->ds;
4514 steps = (src->end - src->start) / src->step;
4515 #if 0
4516 printf
4517 ("DEBUG: start == %lu, end == %lu, %lu steps\n",
4518 src->start, src->end, steps);
4519 #endif
4520 switch (dst->vf.op) {
4521 case VDEF_PERCENT:{
4522 rrd_value_t *array;
4523 int field;
4524 if ((array = malloc(steps * sizeof(double))) == NULL) {
4525 rrd_set_error("malloc VDEV_PERCENT");
4526 return -1;
4527 }
4528 for (step = 0; step < steps; step++) {
4529 array[step] = data[step * src->ds_cnt];
4530 }
4531 qsort(array, step, sizeof(double), vdef_percent_compar);
4532 field = (steps - 1) * dst->vf.param / 100;
4533 dst->vf.val = array[field];
4534 dst->vf.when = 0; /* no time component */
4535 free(array);
4536 #if 0
4537 for (step = 0; step < steps; step++)
4538 printf("DEBUG: %3li:%10.2f %c\n",
4539 step, array[step], step == field ? '*' : ' ');
4540 #endif
4541 }
4542 break;
4543 case VDEF_MAXIMUM:
4544 step = 0;
4545 while (step != steps && isnan(data[step * src->ds_cnt]))
4546 step++;
4547 if (step == steps) {
4548 dst->vf.val = DNAN;
4549 dst->vf.when = 0;
4550 } else {
4551 dst->vf.val = data[step * src->ds_cnt];
4552 dst->vf.when = src->start + (step + 1) * src->step;
4553 }
4554 while (step != steps) {
4555 if (finite(data[step * src->ds_cnt])) {
4556 if (data[step * src->ds_cnt] > dst->vf.val) {
4557 dst->vf.val = data[step * src->ds_cnt];
4558 dst->vf.when = src->start + (step + 1) * src->step;
4559 }
4560 }
4561 step++;
4562 }
4563 break;
4564 case VDEF_TOTAL:
4565 case VDEF_STDEV:
4566 case VDEF_AVERAGE:{
4567 int cnt = 0;
4568 double sum = 0.0;
4569 double average = 0.0;
4571 for (step = 0; step < steps; step++) {
4572 if (finite(data[step * src->ds_cnt])) {
4573 sum += data[step * src->ds_cnt];
4574 cnt++;
4575 };
4576 }
4577 if (cnt) {
4578 if (dst->vf.op == VDEF_TOTAL) {
4579 dst->vf.val = sum * src->step;
4580 dst->vf.when = 0; /* no time component */
4581 } else if (dst->vf.op == VDEF_AVERAGE) {
4582 dst->vf.val = sum / cnt;
4583 dst->vf.when = 0; /* no time component */
4584 } else {
4585 average = sum / cnt;
4586 sum = 0.0;
4587 for (step = 0; step < steps; step++) {
4588 if (finite(data[step * src->ds_cnt])) {
4589 sum += pow((data[step * src->ds_cnt] - average), 2.0);
4590 };
4591 }
4592 dst->vf.val = pow(sum / cnt, 0.5);
4593 dst->vf.when = 0; /* no time component */
4594 };
4595 } else {
4596 dst->vf.val = DNAN;
4597 dst->vf.when = 0;
4598 }
4599 }
4600 break;
4601 case VDEF_MINIMUM:
4602 step = 0;
4603 while (step != steps && isnan(data[step * src->ds_cnt]))
4604 step++;
4605 if (step == steps) {
4606 dst->vf.val = DNAN;
4607 dst->vf.when = 0;
4608 } else {
4609 dst->vf.val = data[step * src->ds_cnt];
4610 dst->vf.when = src->start + (step + 1) * src->step;
4611 }
4612 while (step != steps) {
4613 if (finite(data[step * src->ds_cnt])) {
4614 if (data[step * src->ds_cnt] < dst->vf.val) {
4615 dst->vf.val = data[step * src->ds_cnt];
4616 dst->vf.when = src->start + (step + 1) * src->step;
4617 }
4618 }
4619 step++;
4620 }
4621 break;
4622 case VDEF_FIRST:
4623 /* The time value returned here is one step before the
4624 * actual time value. This is the start of the first
4625 * non-NaN interval.
4626 */
4627 step = 0;
4628 while (step != steps && isnan(data[step * src->ds_cnt]))
4629 step++;
4630 if (step == steps) { /* all entries were NaN */
4631 dst->vf.val = DNAN;
4632 dst->vf.when = 0;
4633 } else {
4634 dst->vf.val = data[step * src->ds_cnt];
4635 dst->vf.when = src->start + step * src->step;
4636 }
4637 break;
4638 case VDEF_LAST:
4639 /* The time value returned here is the
4640 * actual time value. This is the end of the last
4641 * non-NaN interval.
4642 */
4643 step = steps - 1;
4644 while (step >= 0 && isnan(data[step * src->ds_cnt]))
4645 step--;
4646 if (step < 0) { /* all entries were NaN */
4647 dst->vf.val = DNAN;
4648 dst->vf.when = 0;
4649 } else {
4650 dst->vf.val = data[step * src->ds_cnt];
4651 dst->vf.when = src->start + (step + 1) * src->step;
4652 }
4653 break;
4654 case VDEF_LSLSLOPE:
4655 case VDEF_LSLINT:
4656 case VDEF_LSLCORREL:{
4657 /* Bestfit line by linear least squares method */
4659 int cnt = 0;
4660 double SUMx, SUMy, SUMxy, SUMxx, SUMyy, slope, y_intercept, correl;
4662 SUMx = 0;
4663 SUMy = 0;
4664 SUMxy = 0;
4665 SUMxx = 0;
4666 SUMyy = 0;
4667 for (step = 0; step < steps; step++) {
4668 if (finite(data[step * src->ds_cnt])) {
4669 cnt++;
4670 SUMx += step;
4671 SUMxx += step * step;
4672 SUMxy += step * data[step * src->ds_cnt];
4673 SUMy += data[step * src->ds_cnt];
4674 SUMyy += data[step * src->ds_cnt] * data[step * src->ds_cnt];
4675 };
4676 }
4678 slope = (SUMx * SUMy - cnt * SUMxy) / (SUMx * SUMx - cnt * SUMxx);
4679 y_intercept = (SUMy - slope * SUMx) / cnt;
4680 correl =
4681 (SUMxy -
4682 (SUMx * SUMy) / cnt) /
4683 sqrt((SUMxx -
4684 (SUMx * SUMx) / cnt) * (SUMyy - (SUMy * SUMy) / cnt));
4685 if (cnt) {
4686 if (dst->vf.op == VDEF_LSLSLOPE) {
4687 dst->vf.val = slope;
4688 dst->vf.when = 0;
4689 } else if (dst->vf.op == VDEF_LSLINT) {
4690 dst->vf.val = y_intercept;
4691 dst->vf.when = 0;
4692 } else if (dst->vf.op == VDEF_LSLCORREL) {
4693 dst->vf.val = correl;
4694 dst->vf.when = 0;
4695 };
4696 } else {
4697 dst->vf.val = DNAN;
4698 dst->vf.when = 0;
4699 }
4700 }
4701 break;
4702 }
4703 return 0;
4704 }
4706 /* NaN < -INF < finite_values < INF */
4707 int vdef_percent_compar(
4708 const void
4709 *a,
4710 const void
4711 *b)
4712 {
4713 /* Equality is not returned; this doesn't hurt except
4714 * (maybe) for a little performance.
4715 */
4717 /* First catch NaN values. They are smallest */
4718 if (isnan(*(double *) a))
4719 return -1;
4720 if (isnan(*(double *) b))
4721 return 1;
4722 /* NaN doesn't reach this part so INF and -INF are extremes.
4723 * The sign from isinf() is compatible with the sign we return
4724 */
4725 if (isinf(*(double *) a))
4726 return isinf(*(double *) a);
4727 if (isinf(*(double *) b))
4728 return isinf(*(double *) b);
4729 /* If we reach this, both values must be finite */
4730 if (*(double *) a < *(double *) b)
4731 return -1;
4732 else
4733 return 1;
4734 }
4736 void grinfo_push(
4737 image_desc_t *im,
4738 char *key,
4739 enum info_type type,
4740 infoval value)
4741 {
4742 im->grinfo_current = info_push(im->grinfo_current, key, type, value);
4743 if (im->grinfo == NULL) {
4744 im->grinfo = im->grinfo_current;
4745 }
4746 }