1 /****************************************************************************
2 * RRDtool 1.4.3 Copyright by Tobi Oetiker, 1997-2010
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
14 #include "rrd_tool.h"
16 /* for basename */
17 #ifdef HAVE_LIBGEN_H
18 # include <libgen.h>
19 #else
20 #include "plbasename.h"
21 #endif
23 #if defined(WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
24 #include <io.h>
25 #include <fcntl.h>
26 #endif
28 #include <time.h>
30 #include <locale.h>
32 #ifdef HAVE_LANGINFO_H
33 #include <langinfo.h>
34 #endif
36 #include "rrd_graph.h"
37 #include "rrd_client.h"
39 /* some constant definitions */
43 #ifndef RRD_DEFAULT_FONT
44 /* there is special code later to pick Cour.ttf when running on windows */
45 #define RRD_DEFAULT_FONT "DejaVu Sans Mono,Bitstream Vera Sans Mono,monospace,Courier"
46 #endif
48 text_prop_t text_prop[] = {
49 {8.0, RRD_DEFAULT_FONT,NULL}
50 , /* default */
51 {9.0, RRD_DEFAULT_FONT,NULL}
52 , /* title */
53 {7.0, RRD_DEFAULT_FONT,NULL}
54 , /* axis */
55 {8.0, RRD_DEFAULT_FONT,NULL}
56 , /* unit */
57 {8.0, RRD_DEFAULT_FONT,NULL} /* legend */
58 ,
59 {5.5, RRD_DEFAULT_FONT,NULL} /* watermark */
60 };
62 char week_fmt[128] = "Week %V";
64 xlab_t xlab[] = {
65 {0, 0, TMT_SECOND, 30, TMT_MINUTE, 5, TMT_MINUTE, 5, 0, "%H:%M"}
66 ,
67 {2, 0, TMT_MINUTE, 1, TMT_MINUTE, 5, TMT_MINUTE, 5, 0, "%H:%M"}
68 ,
69 {5, 0, TMT_MINUTE, 2, TMT_MINUTE, 10, TMT_MINUTE, 10, 0, "%H:%M"}
70 ,
71 {10, 0, TMT_MINUTE, 5, TMT_MINUTE, 20, TMT_MINUTE, 20, 0, "%H:%M"}
72 ,
73 {30, 0, TMT_MINUTE, 10, TMT_HOUR, 1, TMT_HOUR, 1, 0, "%H:%M"}
74 ,
75 {60, 0, TMT_MINUTE, 30, TMT_HOUR, 2, TMT_HOUR, 2, 0, "%H:%M"}
76 ,
77 {60, 24 * 3600, TMT_MINUTE, 30, TMT_HOUR, 2, TMT_HOUR, 6, 0, "%a %H:%M"}
78 ,
79 {180, 0, TMT_HOUR, 1, TMT_HOUR, 6, TMT_HOUR, 6, 0, "%H:%M"}
80 ,
81 {180, 24 * 3600, TMT_HOUR, 1, TMT_HOUR, 6, TMT_HOUR, 12, 0, "%a %H:%M"}
82 ,
83 /*{300, 0, TMT_HOUR,3, TMT_HOUR,12, TMT_HOUR,12, 12*3600,"%a %p"}, this looks silly */
84 {600, 0, TMT_HOUR, 6, TMT_DAY, 1, TMT_DAY, 1, 24 * 3600, "%a"}
85 ,
86 {1200, 0, TMT_HOUR, 6, TMT_DAY, 1, TMT_DAY, 1, 24 * 3600, "%d"}
87 ,
88 {1800, 0, TMT_HOUR, 12, TMT_DAY, 1, TMT_DAY, 2, 24 * 3600, "%a %d"}
89 ,
90 {2400, 0, TMT_HOUR, 12, TMT_DAY, 1, TMT_DAY, 2, 24 * 3600, "%a"}
91 ,
92 {3600, 0, TMT_DAY, 1, TMT_WEEK, 1, TMT_WEEK, 1, 7 * 24 * 3600, week_fmt}
93 ,
94 {3 * 3600, 0, TMT_WEEK, 1, TMT_MONTH, 1, TMT_WEEK, 2, 7 * 24 * 3600, week_fmt}
95 ,
96 {6 * 3600, 0, TMT_MONTH, 1, TMT_MONTH, 1, TMT_MONTH, 1, 30 * 24 * 3600,
97 "%b"}
98 ,
99 {48 * 3600, 0, TMT_MONTH, 1, TMT_MONTH, 3, TMT_MONTH, 3, 30 * 24 * 3600,
100 "%b"}
101 ,
102 {315360, 0, TMT_MONTH, 3, TMT_YEAR, 1, TMT_YEAR, 1, 365 * 24 * 3600, "%Y"}
103 ,
104 {10 * 24 * 3600, 0, TMT_YEAR, 1, TMT_YEAR, 1, TMT_YEAR, 1,
105 365 * 24 * 3600, "%y"}
106 ,
107 {-1, 0, TMT_MONTH, 0, TMT_MONTH, 0, TMT_MONTH, 0, 0, ""}
108 };
110 /* sensible y label intervals ...*/
112 ylab_t ylab[] = {
113 {0.1, {1, 2, 5, 10}
114 }
115 ,
116 {0.2, {1, 5, 10, 20}
117 }
118 ,
119 {0.5, {1, 2, 4, 10}
120 }
121 ,
122 {1.0, {1, 2, 5, 10}
123 }
124 ,
125 {2.0, {1, 5, 10, 20}
126 }
127 ,
128 {5.0, {1, 2, 4, 10}
129 }
130 ,
131 {10.0, {1, 2, 5, 10}
132 }
133 ,
134 {20.0, {1, 5, 10, 20}
135 }
136 ,
137 {50.0, {1, 2, 4, 10}
138 }
139 ,
140 {100.0, {1, 2, 5, 10}
141 }
142 ,
143 {200.0, {1, 5, 10, 20}
144 }
145 ,
146 {500.0, {1, 2, 4, 10}
147 }
148 ,
149 {0.0, {0, 0, 0, 0}
150 }
151 };
154 gfx_color_t graph_col[] = /* default colors */
155 {
156 {1.00, 1.00, 1.00, 1.00}, /* canvas */
157 {0.95, 0.95, 0.95, 1.00}, /* background */
158 {0.81, 0.81, 0.81, 1.00}, /* shade A */
159 {0.62, 0.62, 0.62, 1.00}, /* shade B */
160 {0.56, 0.56, 0.56, 0.75}, /* grid */
161 {0.87, 0.31, 0.31, 0.60}, /* major grid */
162 {0.00, 0.00, 0.00, 1.00}, /* font */
163 {0.50, 0.12, 0.12, 1.00}, /* arrow */
164 {0.12, 0.12, 0.12, 1.00}, /* axis */
165 {0.00, 0.00, 0.00, 1.00} /* frame */
166 };
169 /* #define DEBUG */
171 #ifdef DEBUG
172 # define DPRINT(x) (void)(printf x, printf("\n"))
173 #else
174 # define DPRINT(x)
175 #endif
178 /* initialize with xtr(im,0); */
179 int xtr(
180 image_desc_t *im,
181 time_t mytime)
182 {
183 static double pixie;
185 if (mytime == 0) {
186 pixie = (double) im->xsize / (double) (im->end - im->start);
187 return im->xorigin;
188 }
189 return (int) ((double) im->xorigin + pixie * (mytime - im->start));
190 }
192 /* translate data values into y coordinates */
193 double ytr(
194 image_desc_t *im,
195 double value)
196 {
197 static double pixie;
198 double yval;
200 if (isnan(value)) {
201 if (!im->logarithmic)
202 pixie = (double) im->ysize / (im->maxval - im->minval);
203 else
204 pixie =
205 (double) im->ysize / (log10(im->maxval) - log10(im->minval));
206 yval = im->yorigin;
207 } else if (!im->logarithmic) {
208 yval = im->yorigin - pixie * (value - im->minval);
209 } else {
210 if (value < im->minval) {
211 yval = im->yorigin;
212 } else {
213 yval = im->yorigin - pixie * (log10(value) - log10(im->minval));
214 }
215 }
216 return yval;
217 }
221 /* conversion function for symbolic entry names */
224 #define conv_if(VV,VVV) \
225 if (strcmp(#VV, string) == 0) return VVV ;
227 enum gf_en gf_conv(
228 char *string)
229 {
231 conv_if(PRINT, GF_PRINT);
232 conv_if(GPRINT, GF_GPRINT);
233 conv_if(COMMENT, GF_COMMENT);
234 conv_if(HRULE, GF_HRULE);
235 conv_if(VRULE, GF_VRULE);
236 conv_if(LINE, GF_LINE);
237 conv_if(AREA, GF_AREA);
238 conv_if(GRAD, GF_GRAD);
239 conv_if(STACK, GF_STACK);
240 conv_if(TICK, GF_TICK);
241 conv_if(TEXTALIGN, GF_TEXTALIGN);
242 conv_if(DEF, GF_DEF);
243 conv_if(CDEF, GF_CDEF);
244 conv_if(VDEF, GF_VDEF);
245 conv_if(XPORT, GF_XPORT);
246 conv_if(SHIFT, GF_SHIFT);
248 return (enum gf_en)(-1);
249 }
251 enum gfx_if_en if_conv(
252 char *string)
253 {
255 conv_if(PNG, IF_PNG);
256 conv_if(SVG, IF_SVG);
257 conv_if(EPS, IF_EPS);
258 conv_if(PDF, IF_PDF);
259 conv_if(XML, IF_XML);
260 conv_if(XMLENUM, IF_XMLENUM);
261 conv_if(CSV, IF_CSV);
262 conv_if(TSV, IF_TSV);
263 conv_if(SSV, IF_SSV);
264 conv_if(JSON, IF_JSON);
265 conv_if(JSONTIME, IF_JSONTIME);
267 return (enum gfx_if_en)(-1);
268 }
270 enum gfx_type_en type_conv(
271 char *string)
272 {
273 conv_if(TIME , GTYPE_TIME);
274 conv_if(XY, GTYPE_XY);
275 return (enum gfx_type_en)(-1);
276 }
278 enum tmt_en tmt_conv(
279 char *string)
280 {
282 conv_if(SECOND, TMT_SECOND);
283 conv_if(MINUTE, TMT_MINUTE);
284 conv_if(HOUR, TMT_HOUR);
285 conv_if(DAY, TMT_DAY);
286 conv_if(WEEK, TMT_WEEK);
287 conv_if(MONTH, TMT_MONTH);
288 conv_if(YEAR, TMT_YEAR);
289 return (enum tmt_en)(-1);
290 }
292 enum grc_en grc_conv(
293 char *string)
294 {
296 conv_if(BACK, GRC_BACK);
297 conv_if(CANVAS, GRC_CANVAS);
298 conv_if(SHADEA, GRC_SHADEA);
299 conv_if(SHADEB, GRC_SHADEB);
300 conv_if(GRID, GRC_GRID);
301 conv_if(MGRID, GRC_MGRID);
302 conv_if(FONT, GRC_FONT);
303 conv_if(ARROW, GRC_ARROW);
304 conv_if(AXIS, GRC_AXIS);
305 conv_if(FRAME, GRC_FRAME);
307 return (enum grc_en)(-1);
308 }
310 enum text_prop_en text_prop_conv(
311 char *string)
312 {
314 conv_if(DEFAULT, TEXT_PROP_DEFAULT);
315 conv_if(TITLE, TEXT_PROP_TITLE);
316 conv_if(AXIS, TEXT_PROP_AXIS);
317 conv_if(UNIT, TEXT_PROP_UNIT);
318 conv_if(LEGEND, TEXT_PROP_LEGEND);
319 conv_if(WATERMARK, TEXT_PROP_WATERMARK);
320 return (enum text_prop_en)(-1);
321 }
324 #undef conv_if
326 int im_free(
327 image_desc_t *im)
328 {
329 unsigned long i, ii;
330 cairo_status_t status = (cairo_status_t) 0;
332 if (im == NULL)
333 return 0;
335 if (im->daemon_addr != NULL)
336 free(im->daemon_addr);
338 for (i = 0; i < (unsigned) im->gdes_c; i++) {
339 if (im->gdes[i].data_first) {
340 /* careful here, because a single pointer can occur several times */
341 free(im->gdes[i].data);
342 if (im->gdes[i].ds_namv) {
343 for (ii = 0; ii < im->gdes[i].ds_cnt; ii++)
344 free(im->gdes[i].ds_namv[ii]);
345 free(im->gdes[i].ds_namv);
346 }
347 }
348 /* free allocated memory used for dashed lines */
349 if (im->gdes[i].p_dashes != NULL)
350 free(im->gdes[i].p_dashes);
352 free(im->gdes[i].p_data);
353 free(im->gdes[i].rpnp);
354 }
355 free(im->gdes);
357 for (i = 0; i < DIM(text_prop);i++){
358 pango_font_description_free(im->text_prop[i].font_desc);
359 im->text_prop[i].font_desc = NULL;
360 }
362 if (im->font_options)
363 cairo_font_options_destroy(im->font_options);
365 if (im->cr) {
366 status = cairo_status(im->cr);
367 cairo_destroy(im->cr);
368 }
371 if (im->rendered_image) {
372 free(im->rendered_image);
373 }
375 if (im->layout) {
376 g_object_unref (im->layout);
377 }
379 if (im->surface)
380 cairo_surface_destroy(im->surface);
382 if (status)
383 fprintf(stderr, "OOPS: Cairo has issues it can't even die: %s\n",
384 cairo_status_to_string(status));
386 return 0;
387 }
389 /* find SI magnitude symbol for the given number*/
390 void auto_scale(
391 image_desc_t *im, /* image description */
392 double *value,
393 char **symb_ptr,
394 double *magfact)
395 {
397 char *symbol[] = { "a", /* 10e-18 Atto */
398 "f", /* 10e-15 Femto */
399 "p", /* 10e-12 Pico */
400 "n", /* 10e-9 Nano */
401 "u", /* 10e-6 Micro */
402 "m", /* 10e-3 Milli */
403 " ", /* Base */
404 "k", /* 10e3 Kilo */
405 "M", /* 10e6 Mega */
406 "G", /* 10e9 Giga */
407 "T", /* 10e12 Tera */
408 "P", /* 10e15 Peta */
409 "E"
410 }; /* 10e18 Exa */
412 int symbcenter = 6;
413 int sindex;
415 if (*value == 0.0 || isnan(*value)) {
416 sindex = 0;
417 *magfact = 1.0;
418 } else {
419 sindex = floor(log(fabs(*value)) / log((double) im->base));
420 *magfact = pow((double) im->base, (double) sindex);
421 (*value) /= (*magfact);
422 }
423 if (sindex <= symbcenter && sindex >= -symbcenter) {
424 (*symb_ptr) = symbol[sindex + symbcenter];
425 } else {
426 (*symb_ptr) = "?";
427 }
428 }
430 /* power prefixes */
432 static char si_symbol[] = {
433 'y', /* 10e-24 Yocto */
434 'z', /* 10e-21 Zepto */
435 'a', /* 10e-18 Atto */
436 'f', /* 10e-15 Femto */
437 'p', /* 10e-12 Pico */
438 'n', /* 10e-9 Nano */
439 'u', /* 10e-6 Micro */
440 'm', /* 10e-3 Milli */
441 ' ', /* Base */
442 'k', /* 10e3 Kilo */
443 'M', /* 10e6 Mega */
444 'G', /* 10e9 Giga */
445 'T', /* 10e12 Tera */
446 'P', /* 10e15 Peta */
447 'E', /* 10e18 Exa */
448 'Z', /* 10e21 Zeta */
449 'Y' /* 10e24 Yotta */
450 };
451 static const int si_symbcenter = 8;
453 /* find SI magnitude symbol for the numbers on the y-axis*/
454 void si_unit(
455 image_desc_t *im /* image description */
456 )
457 {
459 double digits, viewdigits = 0;
461 digits =
462 floor(log(max(fabs(im->minval), fabs(im->maxval))) /
463 log((double) im->base));
465 if (im->unitsexponent != 9999) {
466 /* unitsexponent = 9, 6, 3, 0, -3, -6, -9, etc */
467 viewdigits = floor((double)(im->unitsexponent / 3));
468 } else {
469 viewdigits = digits;
470 }
472 im->magfact = pow((double) im->base, digits);
474 #ifdef DEBUG
475 printf("digits %6.3f im->magfact %6.3f\n", digits, im->magfact);
476 #endif
478 im->viewfactor = im->magfact / pow((double) im->base, viewdigits);
480 if (((viewdigits + si_symbcenter) < sizeof(si_symbol)) &&
481 ((viewdigits + si_symbcenter) >= 0))
482 im->symbol = si_symbol[(int) viewdigits + si_symbcenter];
483 else
484 im->symbol = '?';
485 }
487 /* move min and max values around to become sensible */
489 void expand_range(
490 image_desc_t *im)
491 {
492 double sensiblevalues[] = { 1000.0, 900.0, 800.0, 750.0, 700.0,
493 600.0, 500.0, 400.0, 300.0, 250.0,
494 200.0, 125.0, 100.0, 90.0, 80.0,
495 75.0, 70.0, 60.0, 50.0, 40.0, 30.0,
496 25.0, 20.0, 10.0, 9.0, 8.0,
497 7.0, 6.0, 5.0, 4.0, 3.5, 3.0,
498 2.5, 2.0, 1.8, 1.5, 1.2, 1.0,
499 0.8, 0.7, 0.6, 0.5, 0.4, 0.3, 0.2, 0.1, 0.0, -1
500 };
502 double scaled_min, scaled_max;
503 double adj;
504 int i;
508 #ifdef DEBUG
509 printf("Min: %6.2f Max: %6.2f MagFactor: %6.2f\n",
510 im->minval, im->maxval, im->magfact);
511 #endif
513 if (isnan(im->ygridstep)) {
514 if (im->extra_flags & ALTAUTOSCALE) {
515 /* measure the amplitude of the function. Make sure that
516 graph boundaries are slightly higher then max/min vals
517 so we can see amplitude on the graph */
518 double delt, fact;
520 delt = im->maxval - im->minval;
521 adj = delt * 0.1;
522 fact = 2.0 * pow(10.0,
523 floor(log10
524 (max(fabs(im->minval), fabs(im->maxval)) /
525 im->magfact)) - 2);
526 if (delt < fact) {
527 adj = (fact - delt) * 0.55;
528 #ifdef DEBUG
529 printf
530 ("Min: %6.2f Max: %6.2f delt: %6.2f fact: %6.2f adj: %6.2f\n",
531 im->minval, im->maxval, delt, fact, adj);
532 #endif
533 }
534 im->minval -= adj;
535 im->maxval += adj;
536 } else if (im->extra_flags & ALTAUTOSCALE_MIN) {
537 /* measure the amplitude of the function. Make sure that
538 graph boundaries are slightly lower than min vals
539 so we can see amplitude on the graph */
540 adj = (im->maxval - im->minval) * 0.1;
541 im->minval -= adj;
542 } else if (im->extra_flags & ALTAUTOSCALE_MAX) {
543 /* measure the amplitude of the function. Make sure that
544 graph boundaries are slightly higher than max vals
545 so we can see amplitude on the graph */
546 adj = (im->maxval - im->minval) * 0.1;
547 im->maxval += adj;
548 } else {
549 scaled_min = im->minval / im->magfact;
550 scaled_max = im->maxval / im->magfact;
552 for (i = 1; sensiblevalues[i] > 0; i++) {
553 if (sensiblevalues[i - 1] >= scaled_min &&
554 sensiblevalues[i] <= scaled_min)
555 im->minval = sensiblevalues[i] * (im->magfact);
557 if (-sensiblevalues[i - 1] <= scaled_min &&
558 -sensiblevalues[i] >= scaled_min)
559 im->minval = -sensiblevalues[i - 1] * (im->magfact);
561 if (sensiblevalues[i - 1] >= scaled_max &&
562 sensiblevalues[i] <= scaled_max)
563 im->maxval = sensiblevalues[i - 1] * (im->magfact);
565 if (-sensiblevalues[i - 1] <= scaled_max &&
566 -sensiblevalues[i] >= scaled_max)
567 im->maxval = -sensiblevalues[i] * (im->magfact);
568 }
569 }
570 } else {
571 /* adjust min and max to the grid definition if there is one */
572 im->minval = (double) im->ylabfact * im->ygridstep *
573 floor(im->minval / ((double) im->ylabfact * im->ygridstep));
574 im->maxval = (double) im->ylabfact * im->ygridstep *
575 ceil(im->maxval / ((double) im->ylabfact * im->ygridstep));
576 }
578 #ifdef DEBUG
579 fprintf(stderr, "SCALED Min: %6.2f Max: %6.2f Factor: %6.2f\n",
580 im->minval, im->maxval, im->magfact);
581 #endif
582 }
585 void apply_gridfit(
586 image_desc_t *im)
587 {
588 if (isnan(im->minval) || isnan(im->maxval))
589 return;
590 ytr(im, DNAN);
591 if (im->logarithmic) {
592 double ya, yb, ypix, ypixfrac;
593 double log10_range = log10(im->maxval) - log10(im->minval);
595 ya = pow((double) 10, floor(log10(im->minval)));
596 while (ya < im->minval)
597 ya *= 10;
598 if (ya > im->maxval)
599 return; /* don't have y=10^x gridline */
600 yb = ya * 10;
601 if (yb <= im->maxval) {
602 /* we have at least 2 y=10^x gridlines.
603 Make sure distance between them in pixels
604 are an integer by expanding im->maxval */
605 double y_pixel_delta = ytr(im, ya) - ytr(im, yb);
606 double factor = y_pixel_delta / floor(y_pixel_delta);
607 double new_log10_range = factor * log10_range;
608 double new_ymax_log10 = log10(im->minval) + new_log10_range;
610 im->maxval = pow(10, new_ymax_log10);
611 ytr(im, DNAN); /* reset precalc */
612 log10_range = log10(im->maxval) - log10(im->minval);
613 }
614 /* make sure first y=10^x gridline is located on
615 integer pixel position by moving scale slightly
616 downwards (sub-pixel movement) */
617 ypix = ytr(im, ya) + im->ysize; /* add im->ysize so it always is positive */
618 ypixfrac = ypix - floor(ypix);
619 if (ypixfrac > 0 && ypixfrac < 1) {
620 double yfrac = ypixfrac / im->ysize;
622 im->minval = pow(10, log10(im->minval) - yfrac * log10_range);
623 im->maxval = pow(10, log10(im->maxval) - yfrac * log10_range);
624 ytr(im, DNAN); /* reset precalc */
625 }
626 } else {
627 /* Make sure we have an integer pixel distance between
628 each minor gridline */
629 double ypos1 = ytr(im, im->minval);
630 double ypos2 = ytr(im, im->minval + im->ygrid_scale.gridstep);
631 double y_pixel_delta = ypos1 - ypos2;
632 double factor = y_pixel_delta / floor(y_pixel_delta);
633 double new_range = factor * (im->maxval - im->minval);
634 double gridstep = im->ygrid_scale.gridstep;
635 double minor_y, minor_y_px, minor_y_px_frac;
637 if (im->maxval > 0.0)
638 im->maxval = im->minval + new_range;
639 else
640 im->minval = im->maxval - new_range;
641 ytr(im, DNAN); /* reset precalc */
642 /* make sure first minor gridline is on integer pixel y coord */
643 minor_y = gridstep * floor(im->minval / gridstep);
644 while (minor_y < im->minval)
645 minor_y += gridstep;
646 minor_y_px = ytr(im, minor_y) + im->ysize; /* ensure > 0 by adding ysize */
647 minor_y_px_frac = minor_y_px - floor(minor_y_px);
648 if (minor_y_px_frac > 0 && minor_y_px_frac < 1) {
649 double yfrac = minor_y_px_frac / im->ysize;
650 double range = im->maxval - im->minval;
652 im->minval = im->minval - yfrac * range;
653 im->maxval = im->maxval - yfrac * range;
654 ytr(im, DNAN); /* reset precalc */
655 }
656 calc_horizontal_grid(im); /* recalc with changed im->maxval */
657 }
658 }
660 /* reduce data reimplementation by Alex */
662 void reduce_data(
663 enum cf_en cf, /* which consolidation function ? */
664 unsigned long cur_step, /* step the data currently is in */
665 time_t *start, /* start, end and step as requested ... */
666 time_t *end, /* ... by the application will be ... */
667 unsigned long *step, /* ... adjusted to represent reality */
668 unsigned long *ds_cnt, /* number of data sources in file */
669 rrd_value_t **data)
670 { /* two dimensional array containing the data */
671 int i, reduce_factor = ceil((double) (*step) / (double) cur_step);
672 unsigned long col, dst_row, row_cnt, start_offset, end_offset, skiprows =
673 0;
674 rrd_value_t *srcptr, *dstptr;
676 (*step) = cur_step * reduce_factor; /* set new step size for reduced data */
677 dstptr = *data;
678 srcptr = *data;
679 row_cnt = ((*end) - (*start)) / cur_step;
681 #ifdef DEBUG
682 #define DEBUG_REDUCE
683 #endif
684 #ifdef DEBUG_REDUCE
685 printf("Reducing %lu rows with factor %i time %lu to %lu, step %lu\n",
686 row_cnt, reduce_factor, *start, *end, cur_step);
687 for (col = 0; col < row_cnt; col++) {
688 printf("time %10lu: ", *start + (col + 1) * cur_step);
689 for (i = 0; i < *ds_cnt; i++)
690 printf(" %8.2e", srcptr[*ds_cnt * col + i]);
691 printf("\n");
692 }
693 #endif
695 /* We have to combine [reduce_factor] rows of the source
696 ** into one row for the destination. Doing this we also
697 ** need to take care to combine the correct rows. First
698 ** alter the start and end time so that they are multiples
699 ** of the new step time. We cannot reduce the amount of
700 ** time so we have to move the end towards the future and
701 ** the start towards the past.
702 */
703 end_offset = (*end) % (*step);
704 start_offset = (*start) % (*step);
706 /* If there is a start offset (which cannot be more than
707 ** one destination row), skip the appropriate number of
708 ** source rows and one destination row. The appropriate
709 ** number is what we do know (start_offset/cur_step) of
710 ** the new interval (*step/cur_step aka reduce_factor).
711 */
712 #ifdef DEBUG_REDUCE
713 printf("start_offset: %lu end_offset: %lu\n", start_offset, end_offset);
714 printf("row_cnt before: %lu\n", row_cnt);
715 #endif
716 if (start_offset) {
717 (*start) = (*start) - start_offset;
718 skiprows = reduce_factor - start_offset / cur_step;
719 srcptr += skiprows * *ds_cnt;
720 for (col = 0; col < (*ds_cnt); col++)
721 *dstptr++ = DNAN;
722 row_cnt -= skiprows;
723 }
724 #ifdef DEBUG_REDUCE
725 printf("row_cnt between: %lu\n", row_cnt);
726 #endif
728 /* At the end we have some rows that are not going to be
729 ** used, the amount is end_offset/cur_step
730 */
731 if (end_offset) {
732 (*end) = (*end) - end_offset + (*step);
733 skiprows = end_offset / cur_step;
734 row_cnt -= skiprows;
735 }
736 #ifdef DEBUG_REDUCE
737 printf("row_cnt after: %lu\n", row_cnt);
738 #endif
740 /* Sanity check: row_cnt should be multiple of reduce_factor */
741 /* if this gets triggered, something is REALLY WRONG ... we die immediately */
743 if (row_cnt % reduce_factor) {
744 printf("SANITY CHECK: %lu rows cannot be reduced by %i \n",
745 row_cnt, reduce_factor);
746 printf("BUG in reduce_data()\n");
747 exit(1);
748 }
750 /* Now combine reduce_factor intervals at a time
751 ** into one interval for the destination.
752 */
754 for (dst_row = 0; (long int) row_cnt >= reduce_factor; dst_row++) {
755 for (col = 0; col < (*ds_cnt); col++) {
756 rrd_value_t newval = DNAN;
757 unsigned long validval = 0;
759 for (i = 0; i < reduce_factor; i++) {
760 if (isnan(srcptr[i * (*ds_cnt) + col])) {
761 continue;
762 }
763 validval++;
764 if (isnan(newval))
765 newval = srcptr[i * (*ds_cnt) + col];
766 else {
767 switch (cf) {
768 case CF_HWPREDICT:
769 case CF_MHWPREDICT:
770 case CF_DEVSEASONAL:
771 case CF_DEVPREDICT:
772 case CF_SEASONAL:
773 case CF_AVERAGE:
774 newval += srcptr[i * (*ds_cnt) + col];
775 break;
776 case CF_MINIMUM:
777 newval = min(newval, srcptr[i * (*ds_cnt) + col]);
778 break;
779 case CF_FAILURES:
780 /* an interval contains a failure if any subintervals contained a failure */
781 case CF_MAXIMUM:
782 newval = max(newval, srcptr[i * (*ds_cnt) + col]);
783 break;
784 case CF_LAST:
785 newval = srcptr[i * (*ds_cnt) + col];
786 break;
787 }
788 }
789 }
790 if (validval == 0) {
791 newval = DNAN;
792 } else {
793 switch (cf) {
794 case CF_HWPREDICT:
795 case CF_MHWPREDICT:
796 case CF_DEVSEASONAL:
797 case CF_DEVPREDICT:
798 case CF_SEASONAL:
799 case CF_AVERAGE:
800 newval /= validval;
801 break;
802 case CF_MINIMUM:
803 case CF_FAILURES:
804 case CF_MAXIMUM:
805 case CF_LAST:
806 break;
807 }
808 }
809 *dstptr++ = newval;
810 }
811 srcptr += (*ds_cnt) * reduce_factor;
812 row_cnt -= reduce_factor;
813 }
814 /* If we had to alter the endtime, we didn't have enough
815 ** source rows to fill the last row. Fill it with NaN.
816 */
817 if (end_offset)
818 for (col = 0; col < (*ds_cnt); col++)
819 *dstptr++ = DNAN;
820 #ifdef DEBUG_REDUCE
821 row_cnt = ((*end) - (*start)) / *step;
822 srcptr = *data;
823 printf("Done reducing. Currently %lu rows, time %lu to %lu, step %lu\n",
824 row_cnt, *start, *end, *step);
825 for (col = 0; col < row_cnt; col++) {
826 printf("time %10lu: ", *start + (col + 1) * (*step));
827 for (i = 0; i < *ds_cnt; i++)
828 printf(" %8.2e", srcptr[*ds_cnt * col + i]);
829 printf("\n");
830 }
831 #endif
832 }
835 /* get the data required for the graphs from the
836 relevant rrds ... */
838 int data_fetch(
839 image_desc_t *im)
840 {
841 int i, ii;
842 int skip;
844 /* pull the data from the rrd files ... */
845 for (i = 0; i < (int) im->gdes_c; i++) {
846 /* only GF_DEF elements fetch data */
847 if (im->gdes[i].gf != GF_DEF)
848 continue;
850 skip = 0;
851 /* do we have it already ? */
852 for (ii = 0; ii < i; ii++) {
853 if (im->gdes[ii].gf != GF_DEF)
854 continue;
855 if ((strcmp(im->gdes[i].rrd, im->gdes[ii].rrd) == 0)
856 && (im->gdes[i].cf == im->gdes[ii].cf)
857 && (im->gdes[i].cf_reduce == im->gdes[ii].cf_reduce)
858 && (im->gdes[i].start_orig == im->gdes[ii].start_orig)
859 && (im->gdes[i].end_orig == im->gdes[ii].end_orig)
860 && (im->gdes[i].step_orig == im->gdes[ii].step_orig)) {
861 /* OK, the data is already there.
862 ** Just copy the header portion
863 */
864 im->gdes[i].start = im->gdes[ii].start;
865 im->gdes[i].end = im->gdes[ii].end;
866 im->gdes[i].step = im->gdes[ii].step;
867 im->gdes[i].ds_cnt = im->gdes[ii].ds_cnt;
868 im->gdes[i].ds_namv = im->gdes[ii].ds_namv;
869 im->gdes[i].data = im->gdes[ii].data;
870 im->gdes[i].data_first = 0;
871 skip = 1;
872 }
873 if (skip)
874 break;
875 }
876 if (!skip) {
877 unsigned long ft_step = im->gdes[i].step; /* ft_step will record what we got from fetch */
878 const char *rrd_daemon;
879 int status;
881 if (im->gdes[i].daemon[0] != 0)
882 rrd_daemon = im->gdes[i].daemon;
883 else
884 rrd_daemon = im->daemon_addr;
886 /* "daemon" may be NULL. ENV_RRDCACHED_ADDRESS is evaluated in that
887 * case. If "daemon" holds the same value as in the previous
888 * iteration, no actual new connection is established - the
889 * existing connection is re-used. */
890 rrdc_connect (rrd_daemon);
892 /* If connecting was successfull, use the daemon to query the data.
893 * If there is no connection, for example because no daemon address
894 * was specified, (try to) use the local file directly. */
895 if (rrdc_is_connected (rrd_daemon))
896 {
897 status = rrdc_fetch (im->gdes[i].rrd,
898 cf_to_string (im->gdes[i].cf),
899 &im->gdes[i].start,
900 &im->gdes[i].end,
901 &ft_step,
902 &im->gdes[i].ds_cnt,
903 &im->gdes[i].ds_namv,
904 &im->gdes[i].data);
905 if (status != 0)
906 return (status);
907 }
908 else
909 {
910 if ((rrd_fetch_fn(im->gdes[i].rrd,
911 im->gdes[i].cf,
912 &im->gdes[i].start,
913 &im->gdes[i].end,
914 &ft_step,
915 &im->gdes[i].ds_cnt,
916 &im->gdes[i].ds_namv,
917 &im->gdes[i].data)) == -1) {
918 return -1;
919 }
920 }
921 im->gdes[i].data_first = 1;
923 /* must reduce to at least im->step
924 otherwhise we end up with more data than we can handle in the
925 chart and visibility of data will be random */
926 im->gdes[i].step = max(im->gdes[i].step,im->step);
927 if (ft_step < im->gdes[i].step) {
928 reduce_data(im->gdes[i].cf_reduce,
929 ft_step,
930 &im->gdes[i].start,
931 &im->gdes[i].end,
932 &im->gdes[i].step,
933 &im->gdes[i].ds_cnt, &im->gdes[i].data);
934 } else {
935 im->gdes[i].step = ft_step;
936 }
937 }
939 /* lets see if the required data source is really there */
940 for (ii = 0; ii < (int) im->gdes[i].ds_cnt; ii++) {
941 if (strcmp(im->gdes[i].ds_namv[ii], im->gdes[i].ds_nam) == 0) {
942 im->gdes[i].ds = ii;
943 }
944 }
945 if (im->gdes[i].ds == -1) {
946 rrd_set_error("No DS called '%s' in '%s'",
947 im->gdes[i].ds_nam, im->gdes[i].rrd);
948 return -1;
949 }
951 }
952 return 0;
953 }
955 /* evaluate the expressions in the CDEF functions */
957 /*************************************************************
958 * CDEF stuff
959 *************************************************************/
961 long find_var_wrapper(
962 void *arg1,
963 char *key)
964 {
965 return find_var((image_desc_t *) arg1, key);
966 }
968 /* find gdes containing var*/
969 long find_var(
970 image_desc_t *im,
971 char *key)
972 {
973 long ii;
975 for (ii = 0; ii < im->gdes_c - 1; ii++) {
976 if ((im->gdes[ii].gf == GF_DEF
977 || im->gdes[ii].gf == GF_VDEF || im->gdes[ii].gf == GF_CDEF)
978 && (strcmp(im->gdes[ii].vname, key) == 0)) {
979 return ii;
980 }
981 }
982 return -1;
983 }
985 /* find the greatest common divisor for all the numbers
986 in the 0 terminated num array */
987 long lcd(
988 long *num)
989 {
990 long rest;
991 int i;
993 for (i = 0; num[i + 1] != 0; i++) {
994 do {
995 rest = num[i] % num[i + 1];
996 num[i] = num[i + 1];
997 num[i + 1] = rest;
998 } while (rest != 0);
999 num[i + 1] = num[i];
1000 }
1001 /* return i==0?num[i]:num[i-1]; */
1002 return num[i];
1003 }
1005 /* run the rpn calculator on all the VDEF and CDEF arguments */
1006 int data_calc(
1007 image_desc_t *im)
1008 {
1010 int gdi;
1011 int dataidx;
1012 long *steparray, rpi;
1013 int stepcnt;
1014 time_t now;
1015 rpnstack_t rpnstack;
1017 rpnstack_init(&rpnstack);
1019 for (gdi = 0; gdi < im->gdes_c; gdi++) {
1020 /* Look for GF_VDEF and GF_CDEF in the same loop,
1021 * so CDEFs can use VDEFs and vice versa
1022 */
1023 switch (im->gdes[gdi].gf) {
1024 case GF_XPORT:
1025 break;
1026 case GF_SHIFT:{
1027 graph_desc_t *vdp = &im->gdes[im->gdes[gdi].vidx];
1029 /* remove current shift */
1030 vdp->start -= vdp->shift;
1031 vdp->end -= vdp->shift;
1033 /* vdef */
1034 if (im->gdes[gdi].shidx >= 0)
1035 vdp->shift = im->gdes[im->gdes[gdi].shidx].vf.val;
1036 /* constant */
1037 else
1038 vdp->shift = im->gdes[gdi].shval;
1040 /* normalize shift to multiple of consolidated step */
1041 vdp->shift = (vdp->shift / (long) vdp->step) * (long) vdp->step;
1043 /* apply shift */
1044 vdp->start += vdp->shift;
1045 vdp->end += vdp->shift;
1046 break;
1047 }
1048 case GF_VDEF:
1049 /* A VDEF has no DS. This also signals other parts
1050 * of rrdtool that this is a VDEF value, not a CDEF.
1051 */
1052 im->gdes[gdi].ds_cnt = 0;
1053 if (vdef_calc(im, gdi)) {
1054 rrd_set_error("Error processing VDEF '%s'",
1055 im->gdes[gdi].vname);
1056 rpnstack_free(&rpnstack);
1057 return -1;
1058 }
1059 break;
1060 case GF_CDEF:
1061 im->gdes[gdi].ds_cnt = 1;
1062 im->gdes[gdi].ds = 0;
1063 im->gdes[gdi].data_first = 1;
1064 im->gdes[gdi].start = 0;
1065 im->gdes[gdi].end = 0;
1066 steparray = NULL;
1067 stepcnt = 0;
1068 dataidx = -1;
1070 /* Find the variables in the expression.
1071 * - VDEF variables are substituted by their values
1072 * and the opcode is changed into OP_NUMBER.
1073 * - CDEF variables are analized for their step size,
1074 * the lowest common denominator of all the step
1075 * sizes of the data sources involved is calculated
1076 * and the resulting number is the step size for the
1077 * resulting data source.
1078 */
1079 for (rpi = 0; im->gdes[gdi].rpnp[rpi].op != OP_END; rpi++) {
1080 if (im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
1081 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER) {
1082 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
1084 if (im->gdes[ptr].ds_cnt == 0) { /* this is a VDEF data source */
1085 #if 0
1086 printf
1087 ("DEBUG: inside CDEF '%s' processing VDEF '%s'\n",
1088 im->gdes[gdi].vname, im->gdes[ptr].vname);
1089 printf("DEBUG: value from vdef is %f\n",
1090 im->gdes[ptr].vf.val);
1091 #endif
1092 im->gdes[gdi].rpnp[rpi].val = im->gdes[ptr].vf.val;
1093 im->gdes[gdi].rpnp[rpi].op = OP_NUMBER;
1094 } else { /* normal variables and PREF(variables) */
1096 /* add one entry to the array that keeps track of the step sizes of the
1097 * data sources going into the CDEF. */
1098 if ((steparray =
1099 (long*)rrd_realloc(steparray,
1100 (++stepcnt +
1101 1) * sizeof(*steparray))) == NULL) {
1102 rrd_set_error("realloc steparray");
1103 rpnstack_free(&rpnstack);
1104 return -1;
1105 };
1107 steparray[stepcnt - 1] = im->gdes[ptr].step;
1109 /* adjust start and end of cdef (gdi) so
1110 * that it runs from the latest start point
1111 * to the earliest endpoint of any of the
1112 * rras involved (ptr)
1113 */
1115 if (im->gdes[gdi].start < im->gdes[ptr].start)
1116 im->gdes[gdi].start = im->gdes[ptr].start;
1118 if (im->gdes[gdi].end == 0 ||
1119 im->gdes[gdi].end > im->gdes[ptr].end)
1120 im->gdes[gdi].end = im->gdes[ptr].end;
1122 /* store pointer to the first element of
1123 * the rra providing data for variable,
1124 * further save step size and data source
1125 * count of this rra
1126 */
1127 im->gdes[gdi].rpnp[rpi].data =
1128 im->gdes[ptr].data + im->gdes[ptr].ds;
1129 im->gdes[gdi].rpnp[rpi].step = im->gdes[ptr].step;
1130 im->gdes[gdi].rpnp[rpi].ds_cnt = im->gdes[ptr].ds_cnt;
1132 /* backoff the *.data ptr; this is done so
1133 * rpncalc() function doesn't have to treat
1134 * the first case differently
1135 */
1136 } /* if ds_cnt != 0 */
1137 } /* if OP_VARIABLE */
1138 } /* loop through all rpi */
1140 /* move the data pointers to the correct period */
1141 for (rpi = 0; im->gdes[gdi].rpnp[rpi].op != OP_END; rpi++) {
1142 if (im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
1143 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER) {
1144 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
1145 long diff =
1146 im->gdes[gdi].start - im->gdes[ptr].start;
1148 if (diff > 0)
1149 im->gdes[gdi].rpnp[rpi].data +=
1150 (diff / im->gdes[ptr].step) *
1151 im->gdes[ptr].ds_cnt;
1152 }
1153 }
1155 if (steparray == NULL) {
1156 rrd_set_error("rpn expressions without DEF"
1157 " or CDEF variables are not supported");
1158 rpnstack_free(&rpnstack);
1159 return -1;
1160 }
1161 steparray[stepcnt] = 0;
1162 /* Now find the resulting step. All steps in all
1163 * used RRAs have to be visited
1164 */
1165 im->gdes[gdi].step = lcd(steparray);
1166 free(steparray);
1167 if ((im->gdes[gdi].data = (rrd_value_t*)malloc(((im->gdes[gdi].end -
1168 im->gdes[gdi].start)
1169 / im->gdes[gdi].step)
1170 * sizeof(double))) == NULL) {
1171 rrd_set_error("malloc im->gdes[gdi].data");
1172 rpnstack_free(&rpnstack);
1173 return -1;
1174 }
1176 /* Step through the new cdef results array and
1177 * calculate the values
1178 */
1179 for (now = im->gdes[gdi].start + im->gdes[gdi].step;
1180 now <= im->gdes[gdi].end; now += im->gdes[gdi].step) {
1181 rpnp_t *rpnp = im->gdes[gdi].rpnp;
1183 /* 3rd arg of rpn_calc is for OP_VARIABLE lookups;
1184 * in this case we are advancing by timesteps;
1185 * we use the fact that time_t is a synonym for long
1186 */
1187 if (rpn_calc(rpnp, &rpnstack, (long) now,
1188 im->gdes[gdi].data, ++dataidx) == -1) {
1189 /* rpn_calc sets the error string */
1190 rpnstack_free(&rpnstack);
1191 return -1;
1192 }
1193 } /* enumerate over time steps within a CDEF */
1194 break;
1195 default:
1196 continue;
1197 }
1198 } /* enumerate over CDEFs */
1199 rpnstack_free(&rpnstack);
1200 return 0;
1201 }
1203 /* from http://www.cygnus-software.com/papers/comparingfloats/comparingfloats.htm */
1204 /* yes we are loosing precision by doing tos with floats instead of doubles
1205 but it seems more stable this way. */
1207 static int AlmostEqual2sComplement(
1208 float A,
1209 float B,
1210 int maxUlps)
1211 {
1213 int aInt = *(int *) &A;
1214 int bInt = *(int *) &B;
1215 int intDiff;
1217 /* Make sure maxUlps is non-negative and small enough that the
1218 default NAN won't compare as equal to anything. */
1220 /* assert(maxUlps > 0 && maxUlps < 4 * 1024 * 1024); */
1222 /* Make aInt lexicographically ordered as a twos-complement int */
1224 if (aInt < 0)
1225 aInt = 0x80000000l - aInt;
1227 /* Make bInt lexicographically ordered as a twos-complement int */
1229 if (bInt < 0)
1230 bInt = 0x80000000l - bInt;
1232 intDiff = abs(aInt - bInt);
1234 if (intDiff <= maxUlps)
1235 return 1;
1237 return 0;
1238 }
1240 /* massage data so, that we get one value for each x coordinate in the graph */
1241 int data_proc(
1242 image_desc_t *im)
1243 {
1244 long i, ii;
1245 double pixstep = (double) (im->end - im->start)
1246 / (double) im->xsize; /* how much time
1247 passes in one pixel */
1248 double paintval;
1249 double minval = DNAN, maxval = DNAN;
1251 unsigned long gr_time;
1253 /* memory for the processed data */
1254 for (i = 0; i < im->gdes_c; i++) {
1255 if ((im->gdes[i].gf == GF_LINE)
1256 || (im->gdes[i].gf == GF_AREA)
1257 || (im->gdes[i].gf == GF_TICK)
1258 || (im->gdes[i].gf == GF_GRAD)
1259 ) {
1260 if ((im->gdes[i].p_data = (rrd_value_t*)malloc((im->xsize + 1)
1261 * sizeof(rrd_value_t))) == NULL) {
1262 rrd_set_error("malloc data_proc");
1263 return -1;
1264 }
1265 }
1266 }
1268 for (i = 0; i < im->xsize; i++) { /* for each pixel */
1269 long vidx;
1271 gr_time = im->start + pixstep * i; /* time of the current step */
1272 paintval = 0.0;
1274 for (ii = 0; ii < im->gdes_c; ii++) {
1275 double value;
1277 switch (im->gdes[ii].gf) {
1278 case GF_LINE:
1279 case GF_AREA:
1280 case GF_GRAD:
1281 case GF_TICK:
1282 if (!im->gdes[ii].stack)
1283 paintval = 0.0;
1284 value = im->gdes[ii].yrule;
1285 if (isnan(value) || (im->gdes[ii].gf == GF_TICK)) {
1286 /* The time of the data doesn't necessarily match
1287 ** the time of the graph. Beware.
1288 */
1289 vidx = im->gdes[ii].vidx;
1290 if (im->gdes[vidx].gf == GF_VDEF) {
1291 value = im->gdes[vidx].vf.val;
1292 } else
1293 if (((long int) gr_time >=
1294 (long int) im->gdes[vidx].start)
1295 && ((long int) gr_time <
1296 (long int) im->gdes[vidx].end)) {
1297 value = im->gdes[vidx].data[(unsigned long)
1298 floor((double)
1299 (gr_time -
1300 im->gdes[vidx].
1301 start)
1302 /
1303 im->gdes[vidx].step)
1304 * im->gdes[vidx].ds_cnt +
1305 im->gdes[vidx].ds];
1306 } else {
1307 value = DNAN;
1308 }
1309 };
1311 if (!isnan(value)) {
1312 paintval += value;
1313 im->gdes[ii].p_data[i] = paintval;
1314 /* GF_TICK: the data values are not
1315 ** relevant for min and max
1316 */
1317 if (finite(paintval) && im->gdes[ii].gf != GF_TICK) {
1318 if ((isnan(minval) || paintval < minval) &&
1319 !(im->logarithmic && paintval <= 0.0))
1320 minval = paintval;
1321 if (isnan(maxval) || paintval > maxval)
1322 maxval = paintval;
1323 }
1324 } else {
1325 im->gdes[ii].p_data[i] = DNAN;
1326 }
1327 break;
1328 case GF_STACK:
1329 rrd_set_error
1330 ("STACK should already be turned into LINE or AREA here");
1331 return -1;
1332 break;
1333 default:
1334 break;
1335 }
1336 }
1337 }
1339 /* if min or max have not been asigned a value this is because
1340 there was no data in the graph ... this is not good ...
1341 lets set these to dummy values then ... */
1343 if (im->logarithmic) {
1344 if (isnan(minval) || isnan(maxval) || maxval <= 0) {
1345 minval = 0.0; /* catching this right away below */
1346 maxval = 5.1;
1347 }
1348 /* in logarithm mode, where minval is smaller or equal
1349 to 0 make the beast just way smaller than maxval */
1350 if (minval <= 0) {
1351 minval = maxval / 10e8;
1352 }
1353 } else {
1354 if (isnan(minval) || isnan(maxval)) {
1355 minval = 0.0;
1356 maxval = 1.0;
1357 }
1358 }
1360 /* adjust min and max values given by the user */
1361 /* for logscale we add something on top */
1362 if (isnan(im->minval)
1363 || ((!im->rigid) && im->minval > minval)
1364 ) {
1365 if (im->logarithmic)
1366 im->minval = minval / 2.0;
1367 else
1368 im->minval = minval;
1369 }
1370 if (isnan(im->maxval)
1371 || (!im->rigid && im->maxval < maxval)
1372 ) {
1373 if (im->logarithmic)
1374 im->maxval = maxval * 2.0;
1375 else
1376 im->maxval = maxval;
1377 }
1379 /* make sure min is smaller than max */
1380 if (im->minval > im->maxval) {
1381 if (im->minval > 0)
1382 im->minval = 0.99 * im->maxval;
1383 else
1384 im->minval = 1.01 * im->maxval;
1385 }
1387 /* make sure min and max are not equal */
1388 if (AlmostEqual2sComplement(im->minval, im->maxval, 4)) {
1389 if (im->maxval > 0)
1390 im->maxval *= 1.01;
1391 else
1392 im->maxval *= 0.99;
1394 /* make sure min and max are not both zero */
1395 if (AlmostEqual2sComplement(im->maxval, 0, 4)) {
1396 im->maxval = 1.0;
1397 }
1398 }
1399 return 0;
1400 }
1402 static int find_first_weekday(void){
1403 static int first_weekday = -1;
1404 if (first_weekday == -1){
1405 #ifdef HAVE__NL_TIME_WEEK_1STDAY
1406 /* according to http://sourceware.org/ml/libc-locales/2009-q1/msg00011.html */
1407 long week_1stday_l = (long) nl_langinfo (_NL_TIME_WEEK_1STDAY);
1408 if (week_1stday_l == 19971130) first_weekday = 0; /* Sun */
1409 else if (week_1stday_l == 19971201) first_weekday = 1; /* Mon */
1410 else first_weekday = 1; /* we go for a monday default */
1411 #else
1412 first_weekday = 1;
1413 #endif
1414 }
1415 return first_weekday;
1416 }
1418 /* identify the point where the first gridline, label ... gets placed */
1420 time_t find_first_time(
1421 time_t start, /* what is the initial time */
1422 enum tmt_en baseint, /* what is the basic interval */
1423 long basestep /* how many if these do we jump a time */
1424 )
1425 {
1426 struct tm tm;
1428 localtime_r(&start, &tm);
1430 switch (baseint) {
1431 case TMT_SECOND:
1432 tm. tm_sec -= tm.tm_sec % basestep;
1434 break;
1435 case TMT_MINUTE:
1436 tm. tm_sec = 0;
1437 tm. tm_min -= tm.tm_min % basestep;
1439 break;
1440 case TMT_HOUR:
1441 tm. tm_sec = 0;
1442 tm. tm_min = 0;
1443 tm. tm_hour -= tm.tm_hour % basestep;
1445 break;
1446 case TMT_DAY:
1447 /* we do NOT look at the basestep for this ... */
1448 tm. tm_sec = 0;
1449 tm. tm_min = 0;
1450 tm. tm_hour = 0;
1452 break;
1453 case TMT_WEEK:
1454 /* we do NOT look at the basestep for this ... */
1455 tm. tm_sec = 0;
1456 tm. tm_min = 0;
1457 tm. tm_hour = 0;
1458 tm. tm_mday -= tm.tm_wday - find_first_weekday();
1460 if (tm.tm_wday == 0 && find_first_weekday() > 0)
1461 tm. tm_mday -= 7; /* we want the *previous* week */
1463 break;
1464 case TMT_MONTH:
1465 tm. tm_sec = 0;
1466 tm. tm_min = 0;
1467 tm. tm_hour = 0;
1468 tm. tm_mday = 1;
1469 tm. tm_mon -= tm.tm_mon % basestep;
1471 break;
1473 case TMT_YEAR:
1474 tm. tm_sec = 0;
1475 tm. tm_min = 0;
1476 tm. tm_hour = 0;
1477 tm. tm_mday = 1;
1478 tm. tm_mon = 0;
1479 tm. tm_year -= (
1480 tm.tm_year + 1900) %basestep;
1482 }
1483 return mktime(&tm);
1484 }
1486 /* identify the point where the next gridline, label ... gets placed */
1487 time_t find_next_time(
1488 time_t current, /* what is the initial time */
1489 enum tmt_en baseint, /* what is the basic interval */
1490 long basestep /* how many if these do we jump a time */
1491 )
1492 {
1493 struct tm tm;
1494 time_t madetime;
1496 localtime_r(¤t, &tm);
1498 int limit = 2;
1499 switch (baseint) {
1500 case TMT_SECOND: limit = 7200; break;
1501 case TMT_MINUTE: limit = 120; break;
1502 case TMT_HOUR: limit = 2; break;
1503 default: limit = 2; break;
1504 }
1505 do {
1506 switch (baseint) {
1507 case TMT_SECOND:
1508 tm. tm_sec += basestep;
1510 break;
1511 case TMT_MINUTE:
1512 tm. tm_min += basestep;
1514 break;
1515 case TMT_HOUR:
1516 tm. tm_hour += basestep;
1518 break;
1519 case TMT_DAY:
1520 tm. tm_mday += basestep;
1522 break;
1523 case TMT_WEEK:
1524 tm. tm_mday += 7 * basestep;
1526 break;
1527 case TMT_MONTH:
1528 tm. tm_mon += basestep;
1530 break;
1531 case TMT_YEAR:
1532 tm. tm_year += basestep;
1533 }
1534 madetime = mktime(&tm);
1535 } while (madetime == -1 && limit-- >= 0); /* this is necessary to skip impossible times
1536 like the daylight saving time skips */
1537 return madetime;
1539 }
1542 /* calculate values required for PRINT and GPRINT functions */
1544 int print_calc(
1545 image_desc_t *im)
1546 {
1547 long i, ii, validsteps;
1548 double printval;
1549 struct tm tmvdef;
1550 int graphelement = 0;
1551 long vidx;
1552 int max_ii;
1553 double magfact = -1;
1554 char *si_symb = "";
1555 char *percent_s;
1556 int prline_cnt = 0;
1558 /* wow initializing tmvdef is quite a task :-) */
1559 time_t now = time(NULL);
1561 localtime_r(&now, &tmvdef);
1562 for (i = 0; i < im->gdes_c; i++) {
1563 vidx = im->gdes[i].vidx;
1564 switch (im->gdes[i].gf) {
1565 case GF_PRINT:
1566 case GF_GPRINT:
1567 /* PRINT and GPRINT can now print VDEF generated values.
1568 * There's no need to do any calculations on them as these
1569 * calculations were already made.
1570 */
1571 if (im->gdes[vidx].gf == GF_VDEF) { /* simply use vals */
1572 printval = im->gdes[vidx].vf.val;
1573 localtime_r(&im->gdes[vidx].vf.when, &tmvdef);
1574 } else { /* need to calculate max,min,avg etcetera */
1575 max_ii = ((im->gdes[vidx].end - im->gdes[vidx].start)
1576 / im->gdes[vidx].step * im->gdes[vidx].ds_cnt);
1577 printval = DNAN;
1578 validsteps = 0;
1579 for (ii = im->gdes[vidx].ds;
1580 ii < max_ii; ii += im->gdes[vidx].ds_cnt) {
1581 if (!finite(im->gdes[vidx].data[ii]))
1582 continue;
1583 if (isnan(printval)) {
1584 printval = im->gdes[vidx].data[ii];
1585 validsteps++;
1586 continue;
1587 }
1589 switch (im->gdes[i].cf) {
1590 case CF_HWPREDICT:
1591 case CF_MHWPREDICT:
1592 case CF_DEVPREDICT:
1593 case CF_DEVSEASONAL:
1594 case CF_SEASONAL:
1595 case CF_AVERAGE:
1596 validsteps++;
1597 printval += im->gdes[vidx].data[ii];
1598 break;
1599 case CF_MINIMUM:
1600 printval = min(printval, im->gdes[vidx].data[ii]);
1601 break;
1602 case CF_FAILURES:
1603 case CF_MAXIMUM:
1604 printval = max(printval, im->gdes[vidx].data[ii]);
1605 break;
1606 case CF_LAST:
1607 printval = im->gdes[vidx].data[ii];
1608 }
1609 }
1610 if (im->gdes[i].cf == CF_AVERAGE || im->gdes[i].cf > CF_LAST) {
1611 if (validsteps > 1) {
1612 printval = (printval / validsteps);
1613 }
1614 }
1615 } /* prepare printval */
1617 if (!im->gdes[i].strftm && (percent_s = strstr(im->gdes[i].format, "%S")) != NULL) {
1618 /* Magfact is set to -1 upon entry to print_calc. If it
1619 * is still less than 0, then we need to run auto_scale.
1620 * Otherwise, put the value into the correct units. If
1621 * the value is 0, then do not set the symbol or magnification
1622 * so next the calculation will be performed again. */
1623 if (magfact < 0.0) {
1624 auto_scale(im, &printval, &si_symb, &magfact);
1625 if (printval == 0.0)
1626 magfact = -1.0;
1627 } else {
1628 printval /= magfact;
1629 }
1630 *(++percent_s) = 's';
1631 } else if (!im->gdes[i].strftm && strstr(im->gdes[i].format, "%s") != NULL) {
1632 auto_scale(im, &printval, &si_symb, &magfact);
1633 }
1635 if (im->gdes[i].gf == GF_PRINT) {
1636 rrd_infoval_t prline;
1638 if (im->gdes[i].strftm) {
1639 prline.u_str = (char*)malloc((FMT_LEG_LEN + 2) * sizeof(char));
1640 if (im->gdes[vidx].vf.never == 1) {
1641 time_clean(prline.u_str, im->gdes[i].format);
1642 } else {
1643 strftime(prline.u_str,
1644 FMT_LEG_LEN, im->gdes[i].format, &tmvdef);
1645 }
1646 } else if (bad_format(im->gdes[i].format)) {
1647 rrd_set_error
1648 ("bad format for PRINT in '%s'", im->gdes[i].format);
1649 return -1;
1650 } else {
1651 prline.u_str =
1652 sprintf_alloc(im->gdes[i].format, printval, si_symb);
1653 }
1654 grinfo_push(im,
1655 sprintf_alloc
1656 ("print[%ld]", prline_cnt++), RD_I_STR, prline);
1657 free(prline.u_str);
1658 } else {
1659 /* GF_GPRINT */
1661 if (im->gdes[i].strftm) {
1662 if (im->gdes[vidx].vf.never == 1) {
1663 time_clean(im->gdes[i].legend, im->gdes[i].format);
1664 } else {
1665 strftime(im->gdes[i].legend,
1666 FMT_LEG_LEN, im->gdes[i].format, &tmvdef);
1667 }
1668 } else {
1669 if (bad_format(im->gdes[i].format)) {
1670 rrd_set_error
1671 ("bad format for GPRINT in '%s'",
1672 im->gdes[i].format);
1673 return -1;
1674 }
1675 #ifdef HAVE_SNPRINTF
1676 snprintf(im->gdes[i].legend,
1677 FMT_LEG_LEN - 2,
1678 im->gdes[i].format, printval, si_symb);
1679 #else
1680 sprintf(im->gdes[i].legend,
1681 im->gdes[i].format, printval, si_symb);
1682 #endif
1683 }
1684 graphelement = 1;
1685 }
1686 break;
1687 case GF_LINE:
1688 case GF_AREA:
1689 case GF_GRAD:
1690 case GF_TICK:
1691 graphelement = 1;
1692 break;
1693 case GF_HRULE:
1694 if (isnan(im->gdes[i].yrule)) { /* we must set this here or the legend printer can not decide to print the legend */
1695 im->gdes[i].yrule = im->gdes[vidx].vf.val;
1696 };
1697 graphelement = 1;
1698 break;
1699 case GF_VRULE:
1700 if (im->gdes[i].xrule == 0) { /* again ... the legend printer needs it */
1701 im->gdes[i].xrule = im->gdes[vidx].vf.when;
1702 };
1703 graphelement = 1;
1704 break;
1705 case GF_COMMENT:
1706 case GF_TEXTALIGN:
1707 case GF_DEF:
1708 case GF_CDEF:
1709 case GF_VDEF:
1710 #ifdef WITH_PIECHART
1711 case GF_PART:
1712 #endif
1713 case GF_SHIFT:
1714 case GF_XPORT:
1715 break;
1716 case GF_STACK:
1717 rrd_set_error
1718 ("STACK should already be turned into LINE or AREA here");
1719 return -1;
1720 break;
1721 }
1722 }
1723 return graphelement;
1724 }
1728 /* place legends with color spots */
1729 int leg_place(
1730 image_desc_t *im,
1731 int calc_width)
1732 {
1733 /* graph labels */
1734 int interleg = im->text_prop[TEXT_PROP_LEGEND].size * 2.0;
1735 int border = im->text_prop[TEXT_PROP_LEGEND].size * 2.0;
1736 int fill = 0, fill_last;
1737 double legendwidth; // = im->ximg - 2 * border;
1738 int leg_c = 0;
1739 double leg_x = border;
1740 int leg_y = 0; //im->yimg;
1741 int leg_y_prev = 0; // im->yimg;
1742 int leg_cc;
1743 double glue = 0;
1744 int i, ii, mark = 0;
1745 char default_txtalign = TXA_JUSTIFIED; /*default line orientation */
1746 int *legspace;
1747 char *tab;
1748 char saved_legend[FMT_LEG_LEN + 5];
1750 if(calc_width){
1751 legendwidth = 0;
1752 }
1753 else{
1754 legendwidth = im->legendwidth - 2 * border;
1755 }
1758 if (!(im->extra_flags & NOLEGEND) && !(im->extra_flags & ONLY_GRAPH)) {
1759 if ((legspace = (int*)malloc(im->gdes_c * sizeof(int))) == NULL) {
1760 rrd_set_error("malloc for legspace");
1761 return -1;
1762 }
1764 for (i = 0; i < im->gdes_c; i++) {
1765 char prt_fctn; /*special printfunctions */
1766 if(calc_width){
1767 strcpy(saved_legend, im->gdes[i].legend);
1768 }
1770 fill_last = fill;
1771 /* hide legends for rules which are not displayed */
1772 if (im->gdes[i].gf == GF_TEXTALIGN) {
1773 default_txtalign = im->gdes[i].txtalign;
1774 }
1776 if (!(im->extra_flags & FORCE_RULES_LEGEND)) {
1777 if (im->gdes[i].gf == GF_HRULE
1778 && (im->gdes[i].yrule <
1779 im->minval || im->gdes[i].yrule > im->maxval))
1780 im->gdes[i].legend[0] = '\0';
1781 if (im->gdes[i].gf == GF_VRULE
1782 && (im->gdes[i].xrule <
1783 im->start || im->gdes[i].xrule > im->end))
1784 im->gdes[i].legend[0] = '\0';
1785 }
1787 /* turn \\t into tab */
1788 while ((tab = strstr(im->gdes[i].legend, "\\t"))) {
1789 memmove(tab, tab + 1, strlen(tab));
1790 tab[0] = (char) 9;
1791 }
1793 leg_cc = strlen(im->gdes[i].legend);
1794 /* is there a controle code at the end of the legend string ? */
1795 if (leg_cc >= 2 && im->gdes[i].legend[leg_cc - 2] == '\\') {
1796 prt_fctn = im->gdes[i].legend[leg_cc - 1];
1797 leg_cc -= 2;
1798 im->gdes[i].legend[leg_cc] = '\0';
1799 } else {
1800 prt_fctn = '\0';
1801 }
1802 /* only valid control codes */
1803 if (prt_fctn != 'l' && prt_fctn != 'n' && /* a synonym for l */
1804 prt_fctn != 'r' &&
1805 prt_fctn != 'j' &&
1806 prt_fctn != 'c' &&
1807 prt_fctn != 'u' &&
1808 prt_fctn != '.' &&
1809 prt_fctn != 's' && prt_fctn != '\0' && prt_fctn != 'g') {
1810 free(legspace);
1811 rrd_set_error
1812 ("Unknown control code at the end of '%s\\%c'",
1813 im->gdes[i].legend, prt_fctn);
1814 return -1;
1815 }
1816 /* \n -> \l */
1817 if (prt_fctn == 'n') {
1818 prt_fctn = 'l';
1819 }
1820 /* \. is a null operation to allow strings ending in \x */
1821 if (prt_fctn == '.') {
1822 prt_fctn = '\0';
1823 }
1825 /* remove exess space from the end of the legend for \g */
1826 while (prt_fctn == 'g' &&
1827 leg_cc > 0 && im->gdes[i].legend[leg_cc - 1] == ' ') {
1828 leg_cc--;
1829 im->gdes[i].legend[leg_cc] = '\0';
1830 }
1832 if (leg_cc != 0) {
1834 /* no interleg space if string ends in \g */
1835 legspace[i] = (prt_fctn == 'g' ? 0 : interleg);
1836 if (fill > 0) {
1837 fill += legspace[i];
1838 }
1839 fill +=
1840 gfx_get_text_width(im,
1841 fill + border,
1842 im->
1843 text_prop
1844 [TEXT_PROP_LEGEND].
1845 font_desc,
1846 im->tabwidth, im->gdes[i].legend);
1847 leg_c++;
1848 } else {
1849 legspace[i] = 0;
1850 }
1851 /* who said there was a special tag ... ? */
1852 if (prt_fctn == 'g') {
1853 prt_fctn = '\0';
1854 }
1856 if (prt_fctn == '\0') {
1857 if(calc_width && (fill > legendwidth)){
1858 legendwidth = fill;
1859 }
1860 if (i == im->gdes_c - 1 || fill > legendwidth) {
1861 /* just one legend item is left right or center */
1862 switch (default_txtalign) {
1863 case TXA_RIGHT:
1864 prt_fctn = 'r';
1865 break;
1866 case TXA_CENTER:
1867 prt_fctn = 'c';
1868 break;
1869 case TXA_JUSTIFIED:
1870 prt_fctn = 'j';
1871 break;
1872 default:
1873 prt_fctn = 'l';
1874 break;
1875 }
1876 }
1877 /* is it time to place the legends ? */
1878 if (fill > legendwidth) {
1879 if (leg_c > 1) {
1880 /* go back one */
1881 i--;
1882 fill = fill_last;
1883 leg_c--;
1884 }
1885 }
1886 if (leg_c == 1 && prt_fctn == 'j') {
1887 prt_fctn = 'l';
1888 }
1889 }
1891 if (prt_fctn != '\0') {
1892 leg_x = border;
1893 if (leg_c >= 2 && prt_fctn == 'j') {
1894 glue = (double)(legendwidth - fill) / (double)(leg_c - 1);
1895 } else {
1896 glue = 0;
1897 }
1898 if (prt_fctn == 'c')
1899 leg_x = border + (double)(legendwidth - fill) / 2.0;
1900 if (prt_fctn == 'r')
1901 leg_x = legendwidth - fill + border;
1902 for (ii = mark; ii <= i; ii++) {
1903 if (im->gdes[ii].legend[0] == '\0')
1904 continue; /* skip empty legends */
1905 im->gdes[ii].leg_x = leg_x;
1906 im->gdes[ii].leg_y = leg_y + border;
1907 leg_x +=
1908 (double)gfx_get_text_width(im, leg_x,
1909 im->
1910 text_prop
1911 [TEXT_PROP_LEGEND].
1912 font_desc,
1913 im->tabwidth, im->gdes[ii].legend)
1914 +(double)legspace[ii]
1915 + glue;
1916 }
1917 leg_y_prev = leg_y;
1918 if (leg_x > border || prt_fctn == 's')
1919 leg_y += im->text_prop[TEXT_PROP_LEGEND].size * 1.8;
1920 if (prt_fctn == 's')
1921 leg_y -= im->text_prop[TEXT_PROP_LEGEND].size;
1922 if (prt_fctn == 'u')
1923 leg_y -= im->text_prop[TEXT_PROP_LEGEND].size *1.8;
1925 if(calc_width && (fill > legendwidth)){
1926 legendwidth = fill;
1927 }
1928 fill = 0;
1929 leg_c = 0;
1930 mark = ii;
1931 }
1933 if(calc_width){
1934 strcpy(im->gdes[i].legend, saved_legend);
1935 }
1936 }
1938 if(calc_width){
1939 im->legendwidth = legendwidth + 2 * border;
1940 }
1941 else{
1942 im->legendheight = leg_y + border * 0.6;
1943 }
1944 free(legspace);
1945 }
1946 return 0;
1947 }
1949 /* create a grid on the graph. it determines what to do
1950 from the values of xsize, start and end */
1952 /* the xaxis labels are determined from the number of seconds per pixel
1953 in the requested graph */
1955 int calc_horizontal_grid(
1956 image_desc_t
1957 *im)
1958 {
1959 double range;
1960 double scaledrange;
1961 int pixel, i;
1962 int gridind = 0;
1963 int decimals, fractionals;
1965 im->ygrid_scale.labfact = 2;
1966 range = im->maxval - im->minval;
1967 scaledrange = range / im->magfact;
1968 /* does the scale of this graph make it impossible to put lines
1969 on it? If so, give up. */
1970 if (isnan(scaledrange)) {
1971 return 0;
1972 }
1974 /* find grid spaceing */
1975 pixel = 1;
1976 if (isnan(im->ygridstep)) {
1977 if (im->extra_flags & ALTYGRID) {
1978 /* find the value with max number of digits. Get number of digits */
1979 decimals =
1980 ceil(log10
1981 (max(fabs(im->maxval), fabs(im->minval)) *
1982 im->viewfactor / im->magfact));
1983 if (decimals <= 0) /* everything is small. make place for zero */
1984 decimals = 1;
1985 im->ygrid_scale.gridstep =
1986 pow((double) 10,
1987 floor(log10(range * im->viewfactor / im->magfact))) /
1988 im->viewfactor * im->magfact;
1989 if (im->ygrid_scale.gridstep == 0) /* range is one -> 0.1 is reasonable scale */
1990 im->ygrid_scale.gridstep = 0.1;
1991 /* should have at least 5 lines but no more then 15 */
1992 if (range / im->ygrid_scale.gridstep < 5
1993 && im->ygrid_scale.gridstep >= 30)
1994 im->ygrid_scale.gridstep /= 10;
1995 if (range / im->ygrid_scale.gridstep > 15)
1996 im->ygrid_scale.gridstep *= 10;
1997 if (range / im->ygrid_scale.gridstep > 5) {
1998 im->ygrid_scale.labfact = 1;
1999 if (range / im->ygrid_scale.gridstep > 8
2000 || im->ygrid_scale.gridstep <
2001 1.8 * im->text_prop[TEXT_PROP_AXIS].size)
2002 im->ygrid_scale.labfact = 2;
2003 } else {
2004 im->ygrid_scale.gridstep /= 5;
2005 im->ygrid_scale.labfact = 5;
2006 }
2007 fractionals =
2008 floor(log10
2009 (im->ygrid_scale.gridstep *
2010 (double) im->ygrid_scale.labfact * im->viewfactor /
2011 im->magfact));
2012 if (fractionals < 0) { /* small amplitude. */
2013 int len = decimals - fractionals + 1;
2015 if (im->unitslength < len + 2)
2016 im->unitslength = len + 2;
2017 sprintf(im->ygrid_scale.labfmt,
2018 "%%%d.%df%s", len,
2019 -fractionals, (im->symbol != ' ' ? " %c" : ""));
2020 } else {
2021 int len = decimals + 1;
2023 if (im->unitslength < len + 2)
2024 im->unitslength = len + 2;
2025 sprintf(im->ygrid_scale.labfmt,
2026 "%%%d.0f%s", len, (im->symbol != ' ' ? " %c" : ""));
2027 }
2028 } else { /* classic rrd grid */
2029 for (i = 0; ylab[i].grid > 0; i++) {
2030 pixel = im->ysize / (scaledrange / ylab[i].grid);
2031 gridind = i;
2032 if (pixel >= 5)
2033 break;
2034 }
2036 for (i = 0; i < 4; i++) {
2037 if (pixel * ylab[gridind].lfac[i] >=
2038 1.8 * im->text_prop[TEXT_PROP_AXIS].size) {
2039 im->ygrid_scale.labfact = ylab[gridind].lfac[i];
2040 break;
2041 }
2042 }
2044 im->ygrid_scale.gridstep = ylab[gridind].grid * im->magfact;
2045 }
2046 } else {
2047 im->ygrid_scale.gridstep = im->ygridstep;
2048 im->ygrid_scale.labfact = im->ylabfact;
2049 }
2050 return 1;
2051 }
2053 int draw_horizontal_grid(
2054 image_desc_t
2055 *im)
2056 {
2057 int i;
2058 double scaledstep;
2059 char graph_label[100];
2060 int nlabels = 0;
2061 double X0 = im->xorigin;
2062 double X1 = im->xorigin + im->xsize;
2063 int sgrid = (int) (im->minval / im->ygrid_scale.gridstep - 1);
2064 int egrid = (int) (im->maxval / im->ygrid_scale.gridstep + 1);
2065 double MaxY;
2066 double second_axis_magfact = 0;
2067 char *second_axis_symb = "";
2069 scaledstep =
2070 im->ygrid_scale.gridstep /
2071 (double) im->magfact * (double) im->viewfactor;
2072 MaxY = scaledstep * (double) egrid;
2073 for (i = sgrid; i <= egrid; i++) {
2074 double Y0 = ytr(im,
2075 im->ygrid_scale.gridstep * i);
2076 double YN = ytr(im,
2077 im->ygrid_scale.gridstep * (i + 1));
2079 if (floor(Y0 + 0.5) >=
2080 im->yorigin - im->ysize && floor(Y0 + 0.5) <= im->yorigin) {
2081 /* Make sure at least 2 grid labels are shown, even if it doesn't agree
2082 with the chosen settings. Add a label if required by settings, or if
2083 there is only one label so far and the next grid line is out of bounds. */
2084 if (i % im->ygrid_scale.labfact == 0
2085 || (nlabels == 1
2086 && (YN < im->yorigin - im->ysize || YN > im->yorigin))) {
2087 if (im->symbol == ' ') {
2088 if (im->extra_flags & ALTYGRID) {
2089 sprintf(graph_label,
2090 im->ygrid_scale.labfmt,
2091 scaledstep * (double) i);
2092 } else {
2093 if (MaxY < 10) {
2094 sprintf(graph_label, "%4.1f",
2095 scaledstep * (double) i);
2096 } else {
2097 sprintf(graph_label, "%4.0f",
2098 scaledstep * (double) i);
2099 }
2100 }
2101 } else {
2102 char sisym = (i == 0 ? ' ' : im->symbol);
2104 if (im->extra_flags & ALTYGRID) {
2105 sprintf(graph_label,
2106 im->ygrid_scale.labfmt,
2107 scaledstep * (double) i, sisym);
2108 } else {
2109 if (MaxY < 10) {
2110 sprintf(graph_label, "%4.1f %c",
2111 scaledstep * (double) i, sisym);
2112 } else {
2113 sprintf(graph_label, "%4.0f %c",
2114 scaledstep * (double) i, sisym);
2115 }
2116 }
2117 }
2118 nlabels++;
2119 if (im->second_axis_scale != 0){
2120 char graph_label_right[100];
2121 double sval = im->ygrid_scale.gridstep*(double)i*im->second_axis_scale+im->second_axis_shift;
2122 if (im->second_axis_format[0] == '\0'){
2123 if (!second_axis_magfact){
2124 double dummy = im->ygrid_scale.gridstep*(double)(sgrid+egrid)/2.0*im->second_axis_scale+im->second_axis_shift;
2125 auto_scale(im,&dummy,&second_axis_symb,&second_axis_magfact);
2126 }
2127 sval /= second_axis_magfact;
2129 if(MaxY < 10) {
2130 sprintf(graph_label_right,"%5.1f %s",sval,second_axis_symb);
2131 } else {
2132 sprintf(graph_label_right,"%5.0f %s",sval,second_axis_symb);
2133 }
2134 }
2135 else {
2136 sprintf(graph_label_right,im->second_axis_format,sval);
2137 }
2138 gfx_text ( im,
2139 X1+7, Y0,
2140 im->graph_col[GRC_FONT],
2141 im->text_prop[TEXT_PROP_AXIS].font_desc,
2142 im->tabwidth,0.0, GFX_H_LEFT, GFX_V_CENTER,
2143 graph_label_right );
2144 }
2146 gfx_text(im,
2147 X0 -
2148 im->
2149 text_prop[TEXT_PROP_AXIS].
2150 size, Y0,
2151 im->graph_col[GRC_FONT],
2152 im->
2153 text_prop[TEXT_PROP_AXIS].
2154 font_desc,
2155 im->tabwidth, 0.0,
2156 GFX_H_RIGHT, GFX_V_CENTER, graph_label);
2157 gfx_line(im, X0 - 2, Y0, X0, Y0,
2158 MGRIDWIDTH, im->graph_col[GRC_MGRID]);
2159 gfx_line(im, X1, Y0, X1 + 2, Y0,
2160 MGRIDWIDTH, im->graph_col[GRC_MGRID]);
2161 gfx_dashed_line(im, X0 - 2, Y0,
2162 X1 + 2, Y0,
2163 MGRIDWIDTH,
2164 im->
2165 graph_col
2166 [GRC_MGRID],
2167 im->grid_dash_on, im->grid_dash_off);
2168 } else if (!(im->extra_flags & NOMINOR)) {
2169 gfx_line(im,
2170 X0 - 2, Y0,
2171 X0, Y0, GRIDWIDTH, im->graph_col[GRC_GRID]);
2172 gfx_line(im, X1, Y0, X1 + 2, Y0,
2173 GRIDWIDTH, im->graph_col[GRC_GRID]);
2174 gfx_dashed_line(im, X0 - 1, Y0,
2175 X1 + 1, Y0,
2176 GRIDWIDTH,
2177 im->
2178 graph_col[GRC_GRID],
2179 im->grid_dash_on, im->grid_dash_off);
2180 }
2181 }
2182 }
2183 return 1;
2184 }
2186 /* this is frexp for base 10 */
2187 double frexp10(
2188 double,
2189 double *);
2190 double frexp10(
2191 double x,
2192 double *e)
2193 {
2194 double mnt;
2195 int iexp;
2197 iexp = floor(log((double)fabs(x)) / log((double)10));
2198 mnt = x / pow(10.0, iexp);
2199 if (mnt >= 10.0) {
2200 iexp++;
2201 mnt = x / pow(10.0, iexp);
2202 }
2203 *e = iexp;
2204 return mnt;
2205 }
2208 /* logaritmic horizontal grid */
2209 int horizontal_log_grid(
2210 image_desc_t
2211 *im)
2212 {
2213 double yloglab[][10] = {
2214 {
2215 1.0, 10., 0.0, 0.0, 0.0, 0.0, 0.0,
2216 0.0, 0.0, 0.0}, {
2217 1.0, 5.0, 10., 0.0, 0.0, 0.0, 0.0,
2218 0.0, 0.0, 0.0}, {
2219 1.0, 2.0, 5.0, 7.0, 10., 0.0, 0.0,
2220 0.0, 0.0, 0.0}, {
2221 1.0, 2.0, 4.0,
2222 6.0, 8.0, 10.,
2223 0.0,
2224 0.0, 0.0, 0.0}, {
2225 1.0,
2226 2.0,
2227 3.0,
2228 4.0,
2229 5.0,
2230 6.0,
2231 7.0,
2232 8.0,
2233 9.0,
2234 10.},
2235 {
2236 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} /* last line */
2237 };
2238 int i, j, val_exp, min_exp;
2239 double nex; /* number of decades in data */
2240 double logscale; /* scale in logarithmic space */
2241 int exfrac = 1; /* decade spacing */
2242 int mid = -1; /* row in yloglab for major grid */
2243 double mspac; /* smallest major grid spacing (pixels) */
2244 int flab; /* first value in yloglab to use */
2245 double value, tmp, pre_value;
2246 double X0, X1, Y0;
2247 char graph_label[100];
2249 nex = log10(im->maxval / im->minval);
2250 logscale = im->ysize / nex;
2251 /* major spacing for data with high dynamic range */
2252 while (logscale * exfrac < 3 * im->text_prop[TEXT_PROP_LEGEND].size) {
2253 if (exfrac == 1)
2254 exfrac = 3;
2255 else
2256 exfrac += 3;
2257 }
2259 /* major spacing for less dynamic data */
2260 do {
2261 /* search best row in yloglab */
2262 mid++;
2263 for (i = 0; yloglab[mid][i + 1] < 10.0; i++);
2264 mspac = logscale * log10(10.0 / yloglab[mid][i]);
2265 }
2266 while (mspac >
2267 2 * im->text_prop[TEXT_PROP_LEGEND].size && yloglab[mid][0] > 0);
2268 if (mid)
2269 mid--;
2270 /* find first value in yloglab */
2271 for (flab = 0;
2272 yloglab[mid][flab] < 10
2273 && frexp10(im->minval, &tmp) > yloglab[mid][flab]; flab++);
2274 if (yloglab[mid][flab] == 10.0) {
2275 tmp += 1.0;
2276 flab = 0;
2277 }
2278 val_exp = tmp;
2279 if (val_exp % exfrac)
2280 val_exp += abs(-val_exp % exfrac);
2281 X0 = im->xorigin;
2282 X1 = im->xorigin + im->xsize;
2283 /* draw grid */
2284 pre_value = DNAN;
2285 while (1) {
2287 value = yloglab[mid][flab] * pow(10.0, val_exp);
2288 if (AlmostEqual2sComplement(value, pre_value, 4))
2289 break; /* it seems we are not converging */
2290 pre_value = value;
2291 Y0 = ytr(im, value);
2292 if (floor(Y0 + 0.5) <= im->yorigin - im->ysize)
2293 break;
2294 /* major grid line */
2295 gfx_line(im,
2296 X0 - 2, Y0, X0, Y0, MGRIDWIDTH, im->graph_col[GRC_MGRID]);
2297 gfx_line(im, X1, Y0, X1 + 2, Y0,
2298 MGRIDWIDTH, im->graph_col[GRC_MGRID]);
2299 gfx_dashed_line(im, X0 - 2, Y0,
2300 X1 + 2, Y0,
2301 MGRIDWIDTH,
2302 im->
2303 graph_col
2304 [GRC_MGRID], im->grid_dash_on, im->grid_dash_off);
2305 /* label */
2306 if (im->extra_flags & FORCE_UNITS_SI) {
2307 int scale;
2308 double pvalue;
2309 char symbol;
2311 scale = floor(val_exp / 3.0);
2312 if (value >= 1.0)
2313 pvalue = pow(10.0, val_exp % 3);
2314 else
2315 pvalue = pow(10.0, ((val_exp + 1) % 3) + 2);
2316 pvalue *= yloglab[mid][flab];
2317 if (((scale + si_symbcenter) < (int) sizeof(si_symbol))
2318 && ((scale + si_symbcenter) >= 0))
2319 symbol = si_symbol[scale + si_symbcenter];
2320 else
2321 symbol = '?';
2322 sprintf(graph_label, "%3.0f %c", pvalue, symbol);
2323 } else {
2324 sprintf(graph_label, "%3.0e", value);
2325 }
2326 if (im->second_axis_scale != 0){
2327 char graph_label_right[100];
2328 double sval = value*im->second_axis_scale+im->second_axis_shift;
2329 if (im->second_axis_format[0] == '\0'){
2330 if (im->extra_flags & FORCE_UNITS_SI) {
2331 double mfac = 1;
2332 char *symb = "";
2333 auto_scale(im,&sval,&symb,&mfac);
2334 sprintf(graph_label_right,"%4.0f %s", sval,symb);
2335 }
2336 else {
2337 sprintf(graph_label_right,"%3.0e", sval);
2338 }
2339 }
2340 else {
2341 sprintf(graph_label_right,im->second_axis_format,sval,"");
2342 }
2344 gfx_text ( im,
2345 X1+7, Y0,
2346 im->graph_col[GRC_FONT],
2347 im->text_prop[TEXT_PROP_AXIS].font_desc,
2348 im->tabwidth,0.0, GFX_H_LEFT, GFX_V_CENTER,
2349 graph_label_right );
2350 }
2352 gfx_text(im,
2353 X0 -
2354 im->
2355 text_prop[TEXT_PROP_AXIS].
2356 size, Y0,
2357 im->graph_col[GRC_FONT],
2358 im->
2359 text_prop[TEXT_PROP_AXIS].
2360 font_desc,
2361 im->tabwidth, 0.0,
2362 GFX_H_RIGHT, GFX_V_CENTER, graph_label);
2363 /* minor grid */
2364 if (mid < 4 && exfrac == 1) {
2365 /* find first and last minor line behind current major line
2366 * i is the first line and j tha last */
2367 if (flab == 0) {
2368 min_exp = val_exp - 1;
2369 for (i = 1; yloglab[mid][i] < 10.0; i++);
2370 i = yloglab[mid][i - 1] + 1;
2371 j = 10;
2372 } else {
2373 min_exp = val_exp;
2374 i = yloglab[mid][flab - 1] + 1;
2375 j = yloglab[mid][flab];
2376 }
2378 /* draw minor lines below current major line */
2379 for (; i < j; i++) {
2381 value = i * pow(10.0, min_exp);
2382 if (value < im->minval)
2383 continue;
2384 Y0 = ytr(im, value);
2385 if (floor(Y0 + 0.5) <= im->yorigin - im->ysize)
2386 break;
2387 /* draw lines */
2388 gfx_line(im,
2389 X0 - 2, Y0,
2390 X0, Y0, GRIDWIDTH, im->graph_col[GRC_GRID]);
2391 gfx_line(im, X1, Y0, X1 + 2, Y0,
2392 GRIDWIDTH, im->graph_col[GRC_GRID]);
2393 gfx_dashed_line(im, X0 - 1, Y0,
2394 X1 + 1, Y0,
2395 GRIDWIDTH,
2396 im->
2397 graph_col[GRC_GRID],
2398 im->grid_dash_on, im->grid_dash_off);
2399 }
2400 } else if (exfrac > 1) {
2401 for (i = val_exp - exfrac / 3 * 2; i < val_exp; i += exfrac / 3) {
2402 value = pow(10.0, i);
2403 if (value < im->minval)
2404 continue;
2405 Y0 = ytr(im, value);
2406 if (floor(Y0 + 0.5) <= im->yorigin - im->ysize)
2407 break;
2408 /* draw lines */
2409 gfx_line(im,
2410 X0 - 2, Y0,
2411 X0, Y0, GRIDWIDTH, im->graph_col[GRC_GRID]);
2412 gfx_line(im, X1, Y0, X1 + 2, Y0,
2413 GRIDWIDTH, im->graph_col[GRC_GRID]);
2414 gfx_dashed_line(im, X0 - 1, Y0,
2415 X1 + 1, Y0,
2416 GRIDWIDTH,
2417 im->
2418 graph_col[GRC_GRID],
2419 im->grid_dash_on, im->grid_dash_off);
2420 }
2421 }
2423 /* next decade */
2424 if (yloglab[mid][++flab] == 10.0) {
2425 flab = 0;
2426 val_exp += exfrac;
2427 }
2428 }
2430 /* draw minor lines after highest major line */
2431 if (mid < 4 && exfrac == 1) {
2432 /* find first and last minor line below current major line
2433 * i is the first line and j tha last */
2434 if (flab == 0) {
2435 min_exp = val_exp - 1;
2436 for (i = 1; yloglab[mid][i] < 10.0; i++);
2437 i = yloglab[mid][i - 1] + 1;
2438 j = 10;
2439 } else {
2440 min_exp = val_exp;
2441 i = yloglab[mid][flab - 1] + 1;
2442 j = yloglab[mid][flab];
2443 }
2445 /* draw minor lines below current major line */
2446 for (; i < j; i++) {
2448 value = i * pow(10.0, min_exp);
2449 if (value < im->minval)
2450 continue;
2451 Y0 = ytr(im, value);
2452 if (floor(Y0 + 0.5) <= im->yorigin - im->ysize)
2453 break;
2454 /* draw lines */
2455 gfx_line(im,
2456 X0 - 2, Y0, X0, Y0, GRIDWIDTH, im->graph_col[GRC_GRID]);
2457 gfx_line(im, X1, Y0, X1 + 2, Y0,
2458 GRIDWIDTH, im->graph_col[GRC_GRID]);
2459 gfx_dashed_line(im, X0 - 1, Y0,
2460 X1 + 1, Y0,
2461 GRIDWIDTH,
2462 im->
2463 graph_col[GRC_GRID],
2464 im->grid_dash_on, im->grid_dash_off);
2465 }
2466 }
2467 /* fancy minor gridlines */
2468 else if (exfrac > 1) {
2469 for (i = val_exp - exfrac / 3 * 2; i < val_exp; i += exfrac / 3) {
2470 value = pow(10.0, i);
2471 if (value < im->minval)
2472 continue;
2473 Y0 = ytr(im, value);
2474 if (floor(Y0 + 0.5) <= im->yorigin - im->ysize)
2475 break;
2476 /* draw lines */
2477 gfx_line(im,
2478 X0 - 2, Y0, X0, Y0, GRIDWIDTH, im->graph_col[GRC_GRID]);
2479 gfx_line(im, X1, Y0, X1 + 2, Y0,
2480 GRIDWIDTH, im->graph_col[GRC_GRID]);
2481 gfx_dashed_line(im, X0 - 1, Y0,
2482 X1 + 1, Y0,
2483 GRIDWIDTH,
2484 im->
2485 graph_col[GRC_GRID],
2486 im->grid_dash_on, im->grid_dash_off);
2487 }
2488 }
2490 return 1;
2491 }
2494 void vertical_grid(
2495 image_desc_t *im)
2496 {
2497 int xlab_sel; /* which sort of label and grid ? */
2498 time_t ti, tilab, timajor;
2499 long factor;
2500 char graph_label[100];
2501 double X0, Y0, Y1; /* points for filled graph and more */
2502 struct tm tm;
2504 /* the type of time grid is determined by finding
2505 the number of seconds per pixel in the graph */
2506 if (im->xlab_user.minsec == -1) {
2507 factor = (im->end - im->start) / im->xsize;
2508 xlab_sel = 0;
2509 while (xlab[xlab_sel + 1].minsec !=
2510 -1 && xlab[xlab_sel + 1].minsec <= factor) {
2511 xlab_sel++;
2512 } /* pick the last one */
2513 while (xlab[xlab_sel - 1].minsec ==
2514 xlab[xlab_sel].minsec
2515 && xlab[xlab_sel].length > (im->end - im->start)) {
2516 xlab_sel--;
2517 } /* go back to the smallest size */
2518 im->xlab_user.gridtm = xlab[xlab_sel].gridtm;
2519 im->xlab_user.gridst = xlab[xlab_sel].gridst;
2520 im->xlab_user.mgridtm = xlab[xlab_sel].mgridtm;
2521 im->xlab_user.mgridst = xlab[xlab_sel].mgridst;
2522 im->xlab_user.labtm = xlab[xlab_sel].labtm;
2523 im->xlab_user.labst = xlab[xlab_sel].labst;
2524 im->xlab_user.precis = xlab[xlab_sel].precis;
2525 im->xlab_user.stst = xlab[xlab_sel].stst;
2526 }
2528 /* y coords are the same for every line ... */
2529 Y0 = im->yorigin;
2530 Y1 = im->yorigin - im->ysize;
2531 /* paint the minor grid */
2532 if (!(im->extra_flags & NOMINOR)) {
2533 for (ti = find_first_time(im->start,
2534 im->
2535 xlab_user.
2536 gridtm,
2537 im->
2538 xlab_user.
2539 gridst),
2540 timajor =
2541 find_first_time(im->start,
2542 im->xlab_user.
2543 mgridtm,
2544 im->xlab_user.
2545 mgridst);
2546 ti < im->end && ti != -1;
2547 ti =
2548 find_next_time(ti, im->xlab_user.gridtm, im->xlab_user.gridst)
2549 ) {
2550 /* are we inside the graph ? */
2551 if (ti < im->start || ti > im->end)
2552 continue;
2553 while (timajor < ti && timajor != -1) {
2554 timajor = find_next_time(timajor,
2555 im->
2556 xlab_user.
2557 mgridtm, im->xlab_user.mgridst);
2558 }
2559 if (timajor == -1) break; /* fail in case of problems with time increments */
2560 if (ti == timajor)
2561 continue; /* skip as falls on major grid line */
2562 X0 = xtr(im, ti);
2563 gfx_line(im, X0, Y1 - 2, X0, Y1,
2564 GRIDWIDTH, im->graph_col[GRC_GRID]);
2565 gfx_line(im, X0, Y0, X0, Y0 + 2,
2566 GRIDWIDTH, im->graph_col[GRC_GRID]);
2567 gfx_dashed_line(im, X0, Y0 + 1, X0,
2568 Y1 - 1, GRIDWIDTH,
2569 im->
2570 graph_col[GRC_GRID],
2571 im->grid_dash_on, im->grid_dash_off);
2572 }
2573 }
2575 /* paint the major grid */
2576 for (ti = find_first_time(im->start,
2577 im->
2578 xlab_user.
2579 mgridtm,
2580 im->
2581 xlab_user.
2582 mgridst);
2583 ti < im->end && ti != -1;
2584 ti = find_next_time(ti, im->xlab_user.mgridtm, im->xlab_user.mgridst)
2585 ) {
2586 /* are we inside the graph ? */
2587 if (ti < im->start || ti > im->end)
2588 continue;
2589 X0 = xtr(im, ti);
2590 gfx_line(im, X0, Y1 - 2, X0, Y1,
2591 MGRIDWIDTH, im->graph_col[GRC_MGRID]);
2592 gfx_line(im, X0, Y0, X0, Y0 + 3,
2593 MGRIDWIDTH, im->graph_col[GRC_MGRID]);
2594 gfx_dashed_line(im, X0, Y0 + 3, X0,
2595 Y1 - 2, MGRIDWIDTH,
2596 im->
2597 graph_col
2598 [GRC_MGRID], im->grid_dash_on, im->grid_dash_off);
2599 }
2600 /* paint the labels below the graph */
2601 for (ti =
2602 find_first_time(im->start -
2603 im->xlab_user.
2604 precis / 2,
2605 im->xlab_user.
2606 labtm,
2607 im->xlab_user.
2608 labst);
2609 (ti <=
2610 im->end -
2611 im->xlab_user.precis / 2) && ti != -1;
2612 ti = find_next_time(ti, im->xlab_user.labtm, im->xlab_user.labst)
2613 ) {
2614 tilab = ti + im->xlab_user.precis / 2; /* correct time for the label */
2615 /* are we inside the graph ? */
2616 if (tilab < im->start || tilab > im->end)
2617 continue;
2618 #if HAVE_STRFTIME
2619 localtime_r(&tilab, &tm);
2620 strftime(graph_label, 99, im->xlab_user.stst, &tm);
2621 #else
2622 # error "your libc has no strftime I guess we'll abort the exercise here."
2623 #endif
2624 gfx_text(im,
2625 xtr(im, tilab),
2626 Y0 + 3,
2627 im->graph_col[GRC_FONT],
2628 im->
2629 text_prop[TEXT_PROP_AXIS].
2630 font_desc,
2631 im->tabwidth, 0.0,
2632 GFX_H_CENTER, GFX_V_TOP, graph_label);
2633 }
2635 }
2638 void axis_paint(
2639 image_desc_t *im)
2640 {
2641 /* draw x and y axis */
2642 /* gfx_line ( im->canvas, im->xorigin+im->xsize,im->yorigin,
2643 im->xorigin+im->xsize,im->yorigin-im->ysize,
2644 GRIDWIDTH, im->graph_col[GRC_AXIS]);
2646 gfx_line ( im->canvas, im->xorigin,im->yorigin-im->ysize,
2647 im->xorigin+im->xsize,im->yorigin-im->ysize,
2648 GRIDWIDTH, im->graph_col[GRC_AXIS]); */
2650 gfx_line(im, im->xorigin - 4,
2651 im->yorigin,
2652 im->xorigin + im->xsize +
2653 4, im->yorigin, MGRIDWIDTH, im->graph_col[GRC_AXIS]);
2654 gfx_line(im, im->xorigin,
2655 im->yorigin + 4,
2656 im->xorigin,
2657 im->yorigin - im->ysize -
2658 4, MGRIDWIDTH, im->graph_col[GRC_AXIS]);
2659 /* arrow for X and Y axis direction */
2660 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 */
2661 im->graph_col[GRC_ARROW]);
2662 gfx_close_path(im);
2663 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 */
2664 im->graph_col[GRC_ARROW]);
2665 gfx_close_path(im);
2666 if (im->second_axis_scale != 0){
2667 gfx_line ( im, im->xorigin+im->xsize,im->yorigin+4,
2668 im->xorigin+im->xsize,im->yorigin-im->ysize-4,
2669 MGRIDWIDTH, im->graph_col[GRC_AXIS]);
2670 gfx_new_area ( im,
2671 im->xorigin+im->xsize-2, im->yorigin-im->ysize-2,
2672 im->xorigin+im->xsize+3, im->yorigin-im->ysize-2,
2673 im->xorigin+im->xsize, im->yorigin-im->ysize-7, /* LINEOFFSET */
2674 im->graph_col[GRC_ARROW]);
2675 gfx_close_path(im);
2676 }
2678 }
2680 void grid_paint(
2681 image_desc_t *im)
2682 {
2683 long i;
2684 int res = 0;
2685 double X0, Y0; /* points for filled graph and more */
2686 struct gfx_color_t water_color;
2688 if (im->draw_3d_border > 0) {
2689 /* draw 3d border */
2690 i = im->draw_3d_border;
2691 gfx_new_area(im, 0, im->yimg,
2692 i, im->yimg - i, i, i, im->graph_col[GRC_SHADEA]);
2693 gfx_add_point(im, im->ximg - i, i);
2694 gfx_add_point(im, im->ximg, 0);
2695 gfx_add_point(im, 0, 0);
2696 gfx_close_path(im);
2697 gfx_new_area(im, i, im->yimg - i,
2698 im->ximg - i,
2699 im->yimg - i, im->ximg - i, i, im->graph_col[GRC_SHADEB]);
2700 gfx_add_point(im, im->ximg, 0);
2701 gfx_add_point(im, im->ximg, im->yimg);
2702 gfx_add_point(im, 0, im->yimg);
2703 gfx_close_path(im);
2704 }
2705 if (im->draw_x_grid == 1)
2706 vertical_grid(im);
2707 if (im->draw_y_grid == 1) {
2708 if (im->logarithmic) {
2709 res = horizontal_log_grid(im);
2710 } else {
2711 res = draw_horizontal_grid(im);
2712 }
2714 /* dont draw horizontal grid if there is no min and max val */
2715 if (!res) {
2716 char *nodata = "No Data found";
2718 gfx_text(im, im->ximg / 2,
2719 (2 * im->yorigin -
2720 im->ysize) / 2,
2721 im->graph_col[GRC_FONT],
2722 im->
2723 text_prop[TEXT_PROP_AXIS].
2724 font_desc,
2725 im->tabwidth, 0.0,
2726 GFX_H_CENTER, GFX_V_CENTER, nodata);
2727 }
2728 }
2730 /* yaxis unit description */
2731 if (im->ylegend[0] != '\0'){
2732 gfx_text(im,
2733 im->xOriginLegendY+10,
2734 im->yOriginLegendY,
2735 im->graph_col[GRC_FONT],
2736 im->
2737 text_prop[TEXT_PROP_UNIT].
2738 font_desc,
2739 im->tabwidth,
2740 RRDGRAPH_YLEGEND_ANGLE, GFX_H_CENTER, GFX_V_CENTER, im->ylegend);
2742 }
2743 if (im->second_axis_legend[0] != '\0'){
2744 gfx_text( im,
2745 im->xOriginLegendY2+10,
2746 im->yOriginLegendY2,
2747 im->graph_col[GRC_FONT],
2748 im->text_prop[TEXT_PROP_UNIT].font_desc,
2749 im->tabwidth,
2750 RRDGRAPH_YLEGEND_ANGLE,
2751 GFX_H_CENTER, GFX_V_CENTER,
2752 im->second_axis_legend);
2753 }
2755 /* graph title */
2756 gfx_text(im,
2757 im->xOriginTitle, im->yOriginTitle+6,
2758 im->graph_col[GRC_FONT],
2759 im->
2760 text_prop[TEXT_PROP_TITLE].
2761 font_desc,
2762 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_TOP, im->title);
2763 /* rrdtool 'logo' */
2764 if (!(im->extra_flags & NO_RRDTOOL_TAG)){
2765 water_color = im->graph_col[GRC_FONT];
2766 water_color.alpha = 0.3;
2767 double xpos = im->legendposition == EAST ? im->xOriginLegendY : im->ximg - 4;
2768 gfx_text(im, xpos, 5,
2769 water_color,
2770 im->
2771 text_prop[TEXT_PROP_WATERMARK].
2772 font_desc, im->tabwidth,
2773 -90, GFX_H_LEFT, GFX_V_TOP, "RRDTOOL / TOBI OETIKER");
2774 }
2775 /* graph watermark */
2776 if (im->watermark[0] != '\0') {
2777 water_color = im->graph_col[GRC_FONT];
2778 water_color.alpha = 0.3;
2779 gfx_text(im,
2780 im->ximg / 2, im->yimg - 6,
2781 water_color,
2782 im->
2783 text_prop[TEXT_PROP_WATERMARK].
2784 font_desc, im->tabwidth, 0,
2785 GFX_H_CENTER, GFX_V_BOTTOM, im->watermark);
2786 }
2788 /* graph labels */
2789 if (!(im->extra_flags & NOLEGEND) && !(im->extra_flags & ONLY_GRAPH)) {
2790 for (i = 0; i < im->gdes_c; i++) {
2791 if (im->gdes[i].legend[0] == '\0')
2792 continue;
2793 /* im->gdes[i].leg_y is the bottom of the legend */
2794 X0 = im->xOriginLegend + im->gdes[i].leg_x;
2795 Y0 = im->legenddirection == TOP_DOWN ? im->yOriginLegend + im->gdes[i].leg_y : im->yOriginLegend + im->legendheight - im->gdes[i].leg_y;
2796 gfx_text(im, X0, Y0,
2797 im->graph_col[GRC_FONT],
2798 im->
2799 text_prop
2800 [TEXT_PROP_LEGEND].font_desc,
2801 im->tabwidth, 0.0,
2802 GFX_H_LEFT, GFX_V_BOTTOM, im->gdes[i].legend);
2803 /* The legend for GRAPH items starts with "M " to have
2804 enough space for the box */
2805 if (im->gdes[i].gf != GF_PRINT &&
2806 im->gdes[i].gf != GF_GPRINT && im->gdes[i].gf != GF_COMMENT) {
2807 double boxH, boxV;
2808 double X1, Y1;
2810 boxH = gfx_get_text_width(im, 0,
2811 im->
2812 text_prop
2813 [TEXT_PROP_LEGEND].
2814 font_desc,
2815 im->tabwidth, "o") * 1.2;
2816 boxV = boxH;
2817 /* shift the box up a bit */
2818 Y0 -= boxV * 0.4;
2820 if (im->dynamic_labels && im->gdes[i].gf == GF_HRULE) { /* [-] */
2821 cairo_save(im->cr);
2822 cairo_new_path(im->cr);
2823 cairo_set_line_width(im->cr, 1.0);
2824 gfx_line(im,
2825 X0, Y0 - boxV / 2,
2826 X0 + boxH, Y0 - boxV / 2,
2827 1.0, im->gdes[i].col);
2828 gfx_close_path(im);
2829 } else if (im->dynamic_labels && im->gdes[i].gf == GF_VRULE) { /* [|] */
2830 cairo_save(im->cr);
2831 cairo_new_path(im->cr);
2832 cairo_set_line_width(im->cr, 1.0);
2833 gfx_line(im,
2834 X0 + boxH / 2, Y0,
2835 X0 + boxH / 2, Y0 - boxV,
2836 1.0, im->gdes[i].col);
2837 gfx_close_path(im);
2838 } else if (im->dynamic_labels && im->gdes[i].gf == GF_LINE) { /* [/] */
2839 cairo_save(im->cr);
2840 cairo_new_path(im->cr);
2841 cairo_set_line_width(im->cr, im->gdes[i].linewidth);
2842 gfx_line(im,
2843 X0, Y0,
2844 X0 + boxH, Y0 - boxV,
2845 im->gdes[i].linewidth, im->gdes[i].col);
2846 gfx_close_path(im);
2847 } else {
2848 /* make sure transparent colors show up the same way as in the graph */
2849 gfx_new_area(im,
2850 X0, Y0 - boxV,
2851 X0, Y0, X0 + boxH, Y0, im->graph_col[GRC_BACK]);
2852 gfx_add_point(im, X0 + boxH, Y0 - boxV);
2853 gfx_close_path(im);
2854 gfx_new_area(im, X0, Y0 - boxV, X0,
2855 Y0, X0 + boxH, Y0, im->gdes[i].col);
2856 gfx_add_point(im, X0 + boxH, Y0 - boxV);
2857 gfx_close_path(im);
2858 cairo_save(im->cr);
2859 cairo_new_path(im->cr);
2860 cairo_set_line_width(im->cr, 1.0);
2861 X1 = X0 + boxH;
2862 Y1 = Y0 - boxV;
2863 gfx_line_fit(im, &X0, &Y0);
2864 gfx_line_fit(im, &X1, &Y1);
2865 cairo_move_to(im->cr, X0, Y0);
2866 cairo_line_to(im->cr, X1, Y0);
2867 cairo_line_to(im->cr, X1, Y1);
2868 cairo_line_to(im->cr, X0, Y1);
2869 cairo_close_path(im->cr);
2870 cairo_set_source_rgba(im->cr,
2871 im->graph_col[GRC_FRAME].red,
2872 im->graph_col[GRC_FRAME].green,
2873 im->graph_col[GRC_FRAME].blue,
2874 im->graph_col[GRC_FRAME].alpha);
2875 }
2876 if (im->gdes[i].dash) {
2877 /* make box borders in legend dashed if the graph is dashed */
2878 double dashes[] = {
2879 3.0
2880 };
2881 cairo_set_dash(im->cr, dashes, 1, 0.0);
2882 }
2883 cairo_stroke(im->cr);
2884 cairo_restore(im->cr);
2885 }
2886 }
2887 }
2888 }
2891 /*****************************************************
2892 * lazy check make sure we rely need to create this graph
2893 *****************************************************/
2895 int lazy_check(
2896 image_desc_t *im)
2897 {
2898 FILE *fd = NULL;
2899 int size = 1;
2900 struct stat imgstat;
2902 if (im->lazy == 0)
2903 return 0; /* no lazy option */
2904 if (strlen(im->graphfile) == 0)
2905 return 0; /* inmemory option */
2906 if (stat(im->graphfile, &imgstat) != 0)
2907 return 0; /* can't stat */
2908 /* one pixel in the existing graph is more then what we would
2909 change here ... */
2910 if (time(NULL) - imgstat.st_mtime > (im->end - im->start) / im->xsize)
2911 return 0;
2912 if ((fd = fopen(im->graphfile, "rb")) == NULL)
2913 return 0; /* the file does not exist */
2914 switch (im->imgformat) {
2915 case IF_PNG:
2916 size = PngSize(fd, &(im->ximg), &(im->yimg));
2917 break;
2918 default:
2919 size = 1;
2920 }
2921 fclose(fd);
2922 return size;
2923 }
2926 int graph_size_location(
2927 image_desc_t
2928 *im,
2929 int elements)
2930 {
2931 /* The actual size of the image to draw is determined from
2932 ** several sources. The size given on the command line is
2933 ** the graph area but we need more as we have to draw labels
2934 ** and other things outside the graph area. If the option
2935 ** --full-size-mode is selected the size defines the total
2936 ** image size and the size available for the graph is
2937 ** calculated.
2938 */
2940 /** +---+-----------------------------------+
2941 ** | y |...............graph title.........|
2942 ** | +---+-------------------------------+
2943 ** | a | y | |
2944 ** | x | | |
2945 ** | i | a | |
2946 ** | s | x | main graph area |
2947 ** | | i | |
2948 ** | t | s | |
2949 ** | i | | |
2950 ** | t | l | |
2951 ** | l | b +-------------------------------+
2952 ** | e | l | x axis labels |
2953 ** +---+---+-------------------------------+
2954 ** |....................legends............|
2955 ** +---------------------------------------+
2956 ** | watermark |
2957 ** +---------------------------------------+
2958 */
2960 int Xvertical = 0, Xvertical2 = 0, Ytitle =
2961 0, Xylabel = 0, Xmain = 0, Ymain =
2962 0, Yxlabel = 0, Xspacing = 15, Yspacing = 15, Ywatermark = 4;
2964 // no legends and no the shall be plotted it's easy
2965 if (im->extra_flags & ONLY_GRAPH) {
2966 im->xorigin = 0;
2967 im->ximg = im->xsize;
2968 im->yimg = im->ysize;
2969 im->yorigin = im->ysize;
2970 xtr(im, 0);
2971 ytr(im, DNAN);
2972 return 0;
2973 }
2975 if(im->watermark[0] != '\0') {
2976 Ywatermark = im->text_prop[TEXT_PROP_WATERMARK].size * 2;
2977 }
2979 // calculate the width of the left vertical legend
2980 if (im->ylegend[0] != '\0') {
2981 Xvertical = im->text_prop[TEXT_PROP_UNIT].size * 2;
2982 }
2984 // calculate the width of the right vertical legend
2985 if (im->second_axis_legend[0] != '\0') {
2986 Xvertical2 = im->text_prop[TEXT_PROP_UNIT].size * 2;
2987 }
2988 else{
2989 Xvertical2 = Xspacing;
2990 }
2992 if (im->title[0] != '\0') {
2993 /* The title is placed "inbetween" two text lines so it
2994 ** automatically has some vertical spacing. The horizontal
2995 ** spacing is added here, on each side.
2996 */
2997 /* if necessary, reduce the font size of the title until it fits the image width */
2998 Ytitle = im->text_prop[TEXT_PROP_TITLE].size * 2.6 + 10;
2999 }
3000 else{
3001 // we have no title; get a little clearing from the top
3002 Ytitle = Yspacing;
3003 }
3005 if (elements) {
3006 if (im->draw_x_grid) {
3007 // calculate the height of the horizontal labelling
3008 Yxlabel = im->text_prop[TEXT_PROP_AXIS].size * 2.5;
3009 }
3010 if (im->draw_y_grid || im->forceleftspace) {
3011 // calculate the width of the vertical labelling
3012 Xylabel =
3013 gfx_get_text_width(im, 0,
3014 im->text_prop[TEXT_PROP_AXIS].font_desc,
3015 im->tabwidth, "0") * im->unitslength;
3016 }
3017 }
3019 // add some space to the labelling
3020 Xylabel += Xspacing;
3022 /* If the legend is printed besides the graph the width has to be
3023 ** calculated first. Placing the legend north or south of the
3024 ** graph requires the width calculation first, so the legend is
3025 ** skipped for the moment.
3026 */
3027 im->legendheight = 0;
3028 im->legendwidth = 0;
3029 if (!(im->extra_flags & NOLEGEND)) {
3030 if(im->legendposition == WEST || im->legendposition == EAST){
3031 if (leg_place(im, 1) == -1){
3032 return -1;
3033 }
3034 }
3035 }
3037 if (im->extra_flags & FULL_SIZE_MODE) {
3039 /* The actual size of the image to draw has been determined by the user.
3040 ** The graph area is the space remaining after accounting for the legend,
3041 ** the watermark, the axis labels, and the title.
3042 */
3043 im->ximg = im->xsize;
3044 im->yimg = im->ysize;
3045 Xmain = im->ximg;
3046 Ymain = im->yimg;
3048 /* Now calculate the total size. Insert some spacing where
3049 desired. im->xorigin and im->yorigin need to correspond
3050 with the lower left corner of the main graph area or, if
3051 this one is not set, the imaginary box surrounding the
3052 pie chart area. */
3053 /* Initial size calculation for the main graph area */
3055 Xmain -= Xylabel;// + Xspacing;
3056 if((im->legendposition == WEST || im->legendposition == EAST) && !(im->extra_flags & NOLEGEND) ){
3057 Xmain -= im->legendwidth;// + Xspacing;
3058 }
3059 if (im->second_axis_scale != 0){
3060 Xmain -= Xylabel;
3061 }
3062 if (!(im->extra_flags & NO_RRDTOOL_TAG)){
3063 Xmain -= Xspacing;
3064 }
3066 Xmain -= Xvertical + Xvertical2;
3068 /* limit the remaining space to 0 */
3069 if(Xmain < 1){
3070 Xmain = 1;
3071 }
3072 im->xsize = Xmain;
3074 /* Putting the legend north or south, the height can now be calculated */
3075 if (!(im->extra_flags & NOLEGEND)) {
3076 if(im->legendposition == NORTH || im->legendposition == SOUTH){
3077 im->legendwidth = im->ximg;
3078 if (leg_place(im, 0) == -1){
3079 return -1;
3080 }
3081 }
3082 }
3084 if( (im->legendposition == NORTH || im->legendposition == SOUTH) && !(im->extra_flags & NOLEGEND) ){
3085 Ymain -= Yxlabel + im->legendheight;
3086 }
3087 else{
3088 Ymain -= Yxlabel;
3089 }
3091 /* reserve space for the title *or* some padding above the graph */
3092 Ymain -= Ytitle;
3094 /* reserve space for padding below the graph */
3095 if (im->extra_flags & NOLEGEND) {
3096 Ymain -= 0.5*Yspacing;
3097 }
3099 if (im->watermark[0] != '\0') {
3100 Ymain -= Ywatermark;
3101 }
3102 /* limit the remaining height to 0 */
3103 if(Ymain < 1){
3104 Ymain = 1;
3105 }
3106 im->ysize = Ymain;
3107 } else { /* dimension options -width and -height refer to the dimensions of the main graph area */
3109 /* The actual size of the image to draw is determined from
3110 ** several sources. The size given on the command line is
3111 ** the graph area but we need more as we have to draw labels
3112 ** and other things outside the graph area.
3113 */
3115 if (elements) {
3116 Xmain = im->xsize; // + Xspacing;
3117 Ymain = im->ysize;
3118 }
3120 im->ximg = Xmain + Xylabel;
3121 if (!(im->extra_flags & NO_RRDTOOL_TAG)){
3122 im->ximg += Xspacing;
3123 }
3125 if( (im->legendposition == WEST || im->legendposition == EAST) && !(im->extra_flags & NOLEGEND) ){
3126 im->ximg += im->legendwidth;// + Xspacing;
3127 }
3128 if (im->second_axis_scale != 0){
3129 im->ximg += Xylabel;
3130 }
3132 im->ximg += Xvertical + Xvertical2;
3134 if (!(im->extra_flags & NOLEGEND)) {
3135 if(im->legendposition == NORTH || im->legendposition == SOUTH){
3136 im->legendwidth = im->ximg;
3137 if (leg_place(im, 0) == -1){
3138 return -1;
3139 }
3140 }
3141 }
3143 im->yimg = Ymain + Yxlabel;
3144 if( (im->legendposition == NORTH || im->legendposition == SOUTH) && !(im->extra_flags & NOLEGEND) ){
3145 im->yimg += im->legendheight;
3146 }
3148 /* reserve space for the title *or* some padding above the graph */
3149 if (Ytitle) {
3150 im->yimg += Ytitle;
3151 } else {
3152 im->yimg += 1.5 * Yspacing;
3153 }
3154 /* reserve space for padding below the graph */
3155 if (im->extra_flags & NOLEGEND) {
3156 im->yimg += 0.5*Yspacing;
3157 }
3159 if (im->watermark[0] != '\0') {
3160 im->yimg += Ywatermark;
3161 }
3162 }
3165 /* In case of putting the legend in west or east position the first
3166 ** legend calculation might lead to wrong positions if some items
3167 ** are not aligned on the left hand side (e.g. centered) as the
3168 ** legendwidth wight have been increased after the item was placed.
3169 ** In this case the positions have to be recalculated.
3170 */
3171 if (!(im->extra_flags & NOLEGEND)) {
3172 if(im->legendposition == WEST || im->legendposition == EAST){
3173 if (leg_place(im, 0) == -1){
3174 return -1;
3175 }
3176 }
3177 }
3179 /* After calculating all dimensions
3180 ** it is now possible to calculate
3181 ** all offsets.
3182 */
3183 switch(im->legendposition){
3184 case NORTH:
3185 im->xOriginTitle = (im->ximg / 2);
3186 im->yOriginTitle = 0;
3188 im->xOriginLegend = 0;
3189 im->yOriginLegend = Ytitle;
3191 im->xOriginLegendY = 0;
3192 im->yOriginLegendY = Ytitle + im->legendheight + (Ymain / 2) + Yxlabel;
3194 im->xorigin = Xvertical + Xylabel;
3195 im->yorigin = Ytitle + im->legendheight + Ymain;
3197 im->xOriginLegendY2 = Xvertical + Xylabel + Xmain;
3198 if (im->second_axis_scale != 0){
3199 im->xOriginLegendY2 += Xylabel;
3200 }
3201 im->yOriginLegendY2 = Ytitle + im->legendheight + (Ymain / 2) + Yxlabel;
3203 break;
3205 case WEST:
3206 im->xOriginTitle = im->legendwidth + im->xsize / 2;
3207 im->yOriginTitle = 0;
3209 im->xOriginLegend = 0;
3210 im->yOriginLegend = Ytitle;
3212 im->xOriginLegendY = im->legendwidth;
3213 im->yOriginLegendY = Ytitle + (Ymain / 2);
3215 im->xorigin = im->legendwidth + Xvertical + Xylabel;
3216 im->yorigin = Ytitle + Ymain;
3218 im->xOriginLegendY2 = im->legendwidth + Xvertical + Xylabel + Xmain;
3219 if (im->second_axis_scale != 0){
3220 im->xOriginLegendY2 += Xylabel;
3221 }
3222 im->yOriginLegendY2 = Ytitle + (Ymain / 2);
3224 break;
3226 case SOUTH:
3227 im->xOriginTitle = im->ximg / 2;
3228 im->yOriginTitle = 0;
3230 im->xOriginLegend = 0;
3231 im->yOriginLegend = Ytitle + Ymain + Yxlabel;
3233 im->xOriginLegendY = 0;
3234 im->yOriginLegendY = Ytitle + (Ymain / 2);
3236 im->xorigin = Xvertical + Xylabel;
3237 im->yorigin = Ytitle + Ymain;
3239 im->xOriginLegendY2 = Xvertical + Xylabel + Xmain;
3240 if (im->second_axis_scale != 0){
3241 im->xOriginLegendY2 += Xylabel;
3242 }
3243 im->yOriginLegendY2 = Ytitle + (Ymain / 2);
3245 break;
3247 case EAST:
3248 im->xOriginTitle = im->xsize / 2;
3249 im->yOriginTitle = 0;
3251 im->xOriginLegend = Xvertical + Xylabel + Xmain + Xvertical2;
3252 if (im->second_axis_scale != 0){
3253 im->xOriginLegend += Xylabel;
3254 }
3255 im->yOriginLegend = Ytitle;
3257 im->xOriginLegendY = 0;
3258 im->yOriginLegendY = Ytitle + (Ymain / 2);
3260 im->xorigin = Xvertical + Xylabel;
3261 im->yorigin = Ytitle + Ymain;
3263 im->xOriginLegendY2 = Xvertical + Xylabel + Xmain;
3264 if (im->second_axis_scale != 0){
3265 im->xOriginLegendY2 += Xylabel;
3266 }
3267 im->yOriginLegendY2 = Ytitle + (Ymain / 2);
3269 if (!(im->extra_flags & NO_RRDTOOL_TAG)){
3270 im->xOriginTitle += Xspacing;
3271 im->xOriginLegend += Xspacing;
3272 im->xOriginLegendY += Xspacing;
3273 im->xorigin += Xspacing;
3274 im->xOriginLegendY2 += Xspacing;
3275 }
3276 break;
3277 }
3279 xtr(im, 0);
3280 ytr(im, DNAN);
3281 return 0;
3282 }
3284 static cairo_status_t cairo_output(
3285 void *closure,
3286 const unsigned char
3287 *data,
3288 unsigned int length)
3289 {
3290 image_desc_t *im = (image_desc_t*)closure;
3292 im->rendered_image =
3293 (unsigned char*)realloc(im->rendered_image, im->rendered_image_size + length);
3294 if (im->rendered_image == NULL)
3295 return CAIRO_STATUS_WRITE_ERROR;
3296 memcpy(im->rendered_image + im->rendered_image_size, data, length);
3297 im->rendered_image_size += length;
3298 return CAIRO_STATUS_SUCCESS;
3299 }
3301 /* draw that picture thing ... */
3302 int graph_paint(
3303 image_desc_t *im)
3304 {
3305 int lazy = lazy_check(im);
3306 int i;
3308 /* imgformat XML or higher dispatch to xport
3309 * output format there is selected via graph_type
3310 */
3311 if (im->imgformat >= IF_XML) {
3312 return rrd_graph_xport(im);
3313 }
3315 /* pull the data from the rrd files ... */
3316 if (data_fetch(im) == -1)
3317 return -1;
3318 /* evaluate VDEF and CDEF operations ... */
3319 if (data_calc(im) == -1)
3320 return -1;
3321 /* calculate and PRINT and GPRINT definitions. We have to do it at
3322 * this point because it will affect the length of the legends
3323 * if there are no graph elements (i==0) we stop here ...
3324 * if we are lazy, try to quit ...
3325 */
3326 i = print_calc(im);
3327 if (i < 0)
3328 return -1;
3330 /* if we want and can be lazy ... quit now */
3331 if (i == 0)
3332 return 0;
3334 /* otherwise call graph_paint_timestring */
3335 switch (im->graph_type) {
3336 case GTYPE_TIME:
3337 return graph_paint_timestring(im,lazy);
3338 break;
3339 case GTYPE_XY:
3340 return graph_paint_xy(im,lazy);
3341 break;
3342 }
3343 /* final return with error*/
3344 rrd_set_error("Graph type %i is not implemented",im->graph_type);
3345 return -1;
3346 }
3348 int graph_paint_timestring(
3349 image_desc_t *im, int lazy)
3350 {
3351 int i, ii;
3352 double areazero = 0.0;
3353 graph_desc_t *lastgdes = NULL;
3354 rrd_infoval_t info;
3356 /**************************************************************
3357 *** Calculating sizes and locations became a bit confusing ***
3358 *** so I moved this into a separate function. ***
3359 **************************************************************/
3360 if (graph_size_location(im, i) == -1)
3361 return -1;
3363 info.u_cnt = im->xorigin;
3364 grinfo_push(im, sprintf_alloc("graph_left"), RD_I_CNT, info);
3365 info.u_cnt = im->yorigin - im->ysize;
3366 grinfo_push(im, sprintf_alloc("graph_top"), RD_I_CNT, info);
3367 info.u_cnt = im->xsize;
3368 grinfo_push(im, sprintf_alloc("graph_width"), RD_I_CNT, info);
3369 info.u_cnt = im->ysize;
3370 grinfo_push(im, sprintf_alloc("graph_height"), RD_I_CNT, info);
3371 info.u_cnt = im->ximg;
3372 grinfo_push(im, sprintf_alloc("image_width"), RD_I_CNT, info);
3373 info.u_cnt = im->yimg;
3374 grinfo_push(im, sprintf_alloc("image_height"), RD_I_CNT, info);
3375 info.u_cnt = im->start;
3376 grinfo_push(im, sprintf_alloc("graph_start"), RD_I_CNT, info);
3377 info.u_cnt = im->end;
3378 grinfo_push(im, sprintf_alloc("graph_end"), RD_I_CNT, info);
3380 /* if we want and can be lazy ... quit now */
3381 if (lazy)
3382 return 0;
3384 /* get actual drawing data and find min and max values */
3385 if (data_proc(im) == -1)
3386 return -1;
3387 if (!im->logarithmic) {
3388 si_unit(im);
3389 }
3391 /* identify si magnitude Kilo, Mega Giga ? */
3392 if (!im->rigid && !im->logarithmic)
3393 expand_range(im); /* make sure the upper and lower limit are
3394 sensible values */
3396 info.u_val = im->minval;
3397 grinfo_push(im, sprintf_alloc("value_min"), RD_I_VAL, info);
3398 info.u_val = im->maxval;
3399 grinfo_push(im, sprintf_alloc("value_max"), RD_I_VAL, info);
3402 if (!calc_horizontal_grid(im))
3403 return -1;
3404 /* reset precalc */
3405 ytr(im, DNAN);
3406 /* if (im->gridfit)
3407 apply_gridfit(im); */
3409 /* set up cairo */
3410 if (graph_cairo_setup(im)) { return -1; }
3412 /* other stuff */
3413 if (im->minval > 0.0)
3414 areazero = im->minval;
3415 if (im->maxval < 0.0)
3416 areazero = im->maxval;
3417 for (i = 0; i < im->gdes_c; i++) {
3418 switch (im->gdes[i].gf) {
3419 case GF_CDEF:
3420 case GF_VDEF:
3421 case GF_DEF:
3422 case GF_PRINT:
3423 case GF_GPRINT:
3424 case GF_COMMENT:
3425 case GF_TEXTALIGN:
3426 case GF_HRULE:
3427 case GF_VRULE:
3428 case GF_XPORT:
3429 case GF_SHIFT:
3430 break;
3431 case GF_TICK:
3432 for (ii = 0; ii < im->xsize; ii++) {
3433 if (!isnan(im->gdes[i].p_data[ii])
3434 && im->gdes[i].p_data[ii] != 0.0) {
3435 if (im->gdes[i].yrule > 0) {
3436 gfx_line(im,
3437 im->xorigin + ii,
3438 im->yorigin + 1.0,
3439 im->xorigin + ii,
3440 im->yorigin -
3441 im->gdes[i].yrule *
3442 im->ysize, 1.0, im->gdes[i].col);
3443 } else if (im->gdes[i].yrule < 0) {
3444 gfx_line(im,
3445 im->xorigin + ii,
3446 im->yorigin - im->ysize - 1.0,
3447 im->xorigin + ii,
3448 im->yorigin - im->ysize -
3449 im->gdes[i].
3450 yrule *
3451 im->ysize, 1.0, im->gdes[i].col);
3452 }
3453 }
3454 }
3455 break;
3456 case GF_LINE:
3457 case GF_AREA:
3458 case GF_GRAD: {
3459 rrd_value_t diffval = im->maxval - im->minval;
3460 rrd_value_t maxlimit = im->maxval + 9 * diffval;
3461 rrd_value_t minlimit = im->minval - 9 * diffval;
3462 for (ii = 0; ii < im->xsize; ii++) {
3463 /* fix data points at oo and -oo */
3464 if (isinf(im->gdes[i].p_data[ii])) {
3465 if (im->gdes[i].p_data[ii] > 0) {
3466 im->gdes[i].p_data[ii] = im->maxval;
3467 } else {
3468 im->gdes[i].p_data[ii] = im->minval;
3469 }
3470 }
3471 /* some versions of cairo go unstable when trying
3472 to draw way out of the canvas ... lets not even try */
3473 if (im->gdes[i].p_data[ii] > maxlimit) {
3474 im->gdes[i].p_data[ii] = maxlimit;
3475 }
3476 if (im->gdes[i].p_data[ii] < minlimit) {
3477 im->gdes[i].p_data[ii] = minlimit;
3478 }
3479 } /* for */
3481 /* *******************************************************
3482 a ___. (a,t)
3483 | | ___
3484 ____| | | |
3485 | |___|
3486 -------|--t-1--t--------------------------------
3488 if we know the value at time t was a then
3489 we draw a square from t-1 to t with the value a.
3491 ********************************************************* */
3492 if (im->gdes[i].col.alpha != 0.0) {
3493 /* GF_LINE and friend */
3494 if (im->gdes[i].gf == GF_LINE) {
3495 double last_y = 0.0;
3496 int draw_on = 0;
3498 cairo_save(im->cr);
3499 cairo_new_path(im->cr);
3500 cairo_set_line_width(im->cr, im->gdes[i].linewidth);
3501 if (im->gdes[i].dash) {
3502 cairo_set_dash(im->cr,
3503 im->gdes[i].p_dashes,
3504 im->gdes[i].ndash, im->gdes[i].offset);
3505 }
3507 for (ii = 1; ii < im->xsize; ii++) {
3508 if (isnan(im->gdes[i].p_data[ii])
3509 || (im->slopemode == 1
3510 && isnan(im->gdes[i].p_data[ii - 1]))) {
3511 draw_on = 0;
3512 continue;
3513 }
3514 if (draw_on == 0) {
3515 last_y = ytr(im, im->gdes[i].p_data[ii]);
3516 if (im->slopemode == 0) {
3517 double x = ii - 1 + im->xorigin;
3518 double y = last_y;
3520 gfx_line_fit(im, &x, &y);
3521 cairo_move_to(im->cr, x, y);
3522 x = ii + im->xorigin;
3523 y = last_y;
3524 gfx_line_fit(im, &x, &y);
3525 cairo_line_to(im->cr, x, y);
3526 } else {
3527 double x = ii - 1 + im->xorigin;
3528 double y =
3529 ytr(im, im->gdes[i].p_data[ii - 1]);
3530 gfx_line_fit(im, &x, &y);
3531 cairo_move_to(im->cr, x, y);
3532 x = ii + im->xorigin;
3533 y = last_y;
3534 gfx_line_fit(im, &x, &y);
3535 cairo_line_to(im->cr, x, y);
3536 }
3537 draw_on = 1;
3538 } else {
3539 double x1 = ii + im->xorigin;
3540 double y1 = ytr(im, im->gdes[i].p_data[ii]);
3542 if (im->slopemode == 0
3543 && !AlmostEqual2sComplement(y1, last_y, 4)) {
3544 double x = ii - 1 + im->xorigin;
3545 double y = y1;
3547 gfx_line_fit(im, &x, &y);
3548 cairo_line_to(im->cr, x, y);
3549 };
3550 last_y = y1;
3551 gfx_line_fit(im, &x1, &y1);
3552 cairo_line_to(im->cr, x1, y1);
3553 };
3554 }
3555 cairo_set_source_rgba(im->cr,
3556 im->gdes[i].
3557 col.red,
3558 im->gdes[i].
3559 col.green,
3560 im->gdes[i].
3561 col.blue, im->gdes[i].col.alpha);
3562 cairo_set_line_cap(im->cr, CAIRO_LINE_CAP_ROUND);
3563 cairo_set_line_join(im->cr, CAIRO_LINE_JOIN_ROUND);
3564 cairo_stroke(im->cr);
3565 cairo_restore(im->cr);
3566 } else {
3567 double lastx=0;
3568 double lasty=0;
3569 int idxI = -1;
3570 double *foreY =
3571 (double *) malloc(sizeof(double) * im->xsize * 2);
3572 double *foreX =
3573 (double *) malloc(sizeof(double) * im->xsize * 2);
3574 double *backY =
3575 (double *) malloc(sizeof(double) * im->xsize * 2);
3576 double *backX =
3577 (double *) malloc(sizeof(double) * im->xsize * 2);
3578 int drawem = 0;
3580 for (ii = 0; ii <= im->xsize; ii++) {
3581 double ybase, ytop;
3583 if (idxI > 0 && (drawem != 0 || ii == im->xsize)) {
3584 int cntI = 1;
3585 int lastI = 0;
3587 while (cntI < idxI
3588 &&
3589 AlmostEqual2sComplement(foreY
3590 [lastI],
3591 foreY[cntI], 4)
3592 &&
3593 AlmostEqual2sComplement(foreY
3594 [lastI],
3595 foreY
3596 [cntI + 1], 4)) {
3597 cntI++;
3598 }
3599 if (im->gdes[i].gf != GF_GRAD) {
3600 gfx_new_area(im,
3601 backX[0], backY[0],
3602 foreX[0], foreY[0],
3603 foreX[cntI],
3604 foreY[cntI], im->gdes[i].col);
3605 } else {
3606 lastx = foreX[cntI];
3607 lasty = foreY[cntI];
3608 }
3609 while (cntI < idxI) {
3610 lastI = cntI;
3611 cntI++;
3612 while (cntI < idxI
3613 &&
3614 AlmostEqual2sComplement(foreY
3615 [lastI],
3616 foreY[cntI], 4)
3617 &&
3618 AlmostEqual2sComplement(foreY
3619 [lastI],
3620 foreY
3621 [cntI
3622 + 1], 4)) {
3623 cntI++;
3624 }
3625 if (im->gdes[i].gf != GF_GRAD) {
3626 gfx_add_point(im, foreX[cntI], foreY[cntI]);
3627 } else {
3628 gfx_add_rect_fadey(im,
3629 lastx, foreY[0],
3630 foreX[cntI], foreY[cntI], lasty,
3631 im->gdes[i].col,
3632 im->gdes[i].col2,
3633 im->gdes[i].gradheight
3634 );
3635 lastx = foreX[cntI];
3636 lasty = foreY[cntI];
3637 }
3638 }
3639 if (im->gdes[i].gf != GF_GRAD) {
3640 gfx_add_point(im, backX[idxI], backY[idxI]);
3641 } else {
3642 gfx_add_rect_fadey(im,
3643 lastx, foreY[0],
3644 backX[idxI], backY[idxI], lasty,
3645 im->gdes[i].col,
3646 im->gdes[i].col2,
3647 im->gdes[i].gradheight);
3648 lastx = backX[idxI];
3649 lasty = backY[idxI];
3650 }
3651 while (idxI > 1) {
3652 lastI = idxI;
3653 idxI--;
3654 while (idxI > 1
3655 &&
3656 AlmostEqual2sComplement(backY
3657 [lastI],
3658 backY[idxI], 4)
3659 &&
3660 AlmostEqual2sComplement(backY
3661 [lastI],
3662 backY
3663 [idxI
3664 - 1], 4)) {
3665 idxI--;
3666 }
3667 if (im->gdes[i].gf != GF_GRAD) {
3668 gfx_add_point(im, backX[idxI], backY[idxI]);
3669 } else {
3670 gfx_add_rect_fadey(im,
3671 lastx, foreY[0],
3672 backX[idxI], backY[idxI], lasty,
3673 im->gdes[i].col,
3674 im->gdes[i].col2,
3675 im->gdes[i].gradheight);
3676 lastx = backX[idxI];
3677 lasty = backY[idxI];
3678 }
3679 }
3680 idxI = -1;
3681 drawem = 0;
3682 if (im->gdes[i].gf != GF_GRAD)
3683 gfx_close_path(im);
3684 }
3685 if (drawem != 0) {
3686 drawem = 0;
3687 idxI = -1;
3688 }
3689 if (ii == im->xsize)
3690 break;
3691 if (im->slopemode == 0 && ii == 0) {
3692 continue;
3693 }
3694 if (isnan(im->gdes[i].p_data[ii])) {
3695 drawem = 1;
3696 continue;
3697 }
3698 ytop = ytr(im, im->gdes[i].p_data[ii]);
3699 if (lastgdes && im->gdes[i].stack) {
3700 ybase = ytr(im, lastgdes->p_data[ii]);
3701 } else {
3702 ybase = ytr(im, areazero);
3703 }
3704 if (ybase == ytop) {
3705 drawem = 1;
3706 continue;
3707 }
3709 if (ybase > ytop) {
3710 double extra = ytop;
3712 ytop = ybase;
3713 ybase = extra;
3714 }
3715 if (im->slopemode == 0) {
3716 backY[++idxI] = ybase - 0.2;
3717 backX[idxI] = ii + im->xorigin - 1;
3718 foreY[idxI] = ytop + 0.2;
3719 foreX[idxI] = ii + im->xorigin - 1;
3720 }
3721 backY[++idxI] = ybase - 0.2;
3722 backX[idxI] = ii + im->xorigin;
3723 foreY[idxI] = ytop + 0.2;
3724 foreX[idxI] = ii + im->xorigin;
3725 }
3726 /* close up any remaining area */
3727 free(foreY);
3728 free(foreX);
3729 free(backY);
3730 free(backX);
3731 } /* else GF_LINE */
3732 }
3733 /* if color != 0x0 */
3734 /* make sure we do not run into trouble when stacking on NaN */
3735 for (ii = 0; ii < im->xsize; ii++) {
3736 if (isnan(im->gdes[i].p_data[ii])) {
3737 if (lastgdes && (im->gdes[i].stack)) {
3738 im->gdes[i].p_data[ii] = lastgdes->p_data[ii];
3739 } else {
3740 im->gdes[i].p_data[ii] = areazero;
3741 }
3742 }
3743 }
3744 lastgdes = &(im->gdes[i]);
3745 break;
3746 } /* GF_AREA, GF_LINE, GF_GRAD */
3747 case GF_STACK:
3748 rrd_set_error
3749 ("STACK should already be turned into LINE or AREA here");
3750 return -1;
3751 break;
3752 } /* switch */
3753 }
3754 cairo_reset_clip(im->cr);
3756 /* grid_paint also does the text */
3757 if (!(im->extra_flags & ONLY_GRAPH))
3758 grid_paint(im);
3759 if (!(im->extra_flags & ONLY_GRAPH))
3760 axis_paint(im);
3761 /* the RULES are the last thing to paint ... */
3762 for (i = 0; i < im->gdes_c; i++) {
3764 switch (im->gdes[i].gf) {
3765 case GF_HRULE:
3766 if (im->gdes[i].yrule >= im->minval
3767 && im->gdes[i].yrule <= im->maxval) {
3768 cairo_save(im->cr);
3769 if (im->gdes[i].dash) {
3770 cairo_set_dash(im->cr,
3771 im->gdes[i].p_dashes,
3772 im->gdes[i].ndash, im->gdes[i].offset);
3773 }
3774 gfx_line(im, im->xorigin,
3775 ytr(im, im->gdes[i].yrule),
3776 im->xorigin + im->xsize,
3777 ytr(im, im->gdes[i].yrule), 1.0, im->gdes[i].col);
3778 cairo_stroke(im->cr);
3779 cairo_restore(im->cr);
3780 }
3781 break;
3782 case GF_VRULE:
3783 if (im->gdes[i].xrule >= im->start
3784 && im->gdes[i].xrule <= im->end) {
3785 cairo_save(im->cr);
3786 if (im->gdes[i].dash) {
3787 cairo_set_dash(im->cr,
3788 im->gdes[i].p_dashes,
3789 im->gdes[i].ndash, im->gdes[i].offset);
3790 }
3791 gfx_line(im,
3792 xtr(im, im->gdes[i].xrule),
3793 im->yorigin, xtr(im,
3794 im->
3795 gdes[i].
3796 xrule),
3797 im->yorigin - im->ysize, 1.0, im->gdes[i].col);
3798 cairo_stroke(im->cr);
3799 cairo_restore(im->cr);
3800 }
3801 break;
3802 default:
3803 break;
3804 }
3805 }
3806 /* close the graph via cairo*/
3807 return graph_cairo_finish(im);
3808 }
3810 int graph_cairo_setup (image_desc_t *im)
3811 {
3812 /* the actual graph is created by going through the individual
3813 graph elements and then drawing them */
3814 cairo_surface_destroy(im->surface);
3815 switch (im->imgformat) {
3816 case IF_PNG:
3817 im->surface =
3818 cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
3819 im->ximg * im->zoom,
3820 im->yimg * im->zoom);
3821 break;
3822 case IF_PDF:
3823 im->gridfit = 0;
3824 im->surface = strlen(im->graphfile)
3825 ? cairo_pdf_surface_create(im->graphfile, im->ximg * im->zoom,
3826 im->yimg * im->zoom)
3827 : cairo_pdf_surface_create_for_stream
3828 (&cairo_output, im, im->ximg * im->zoom, im->yimg * im->zoom);
3829 break;
3830 case IF_EPS:
3831 im->gridfit = 0;
3832 im->surface = strlen(im->graphfile)
3833 ?
3834 cairo_ps_surface_create(im->graphfile, im->ximg * im->zoom,
3835 im->yimg * im->zoom)
3836 : cairo_ps_surface_create_for_stream
3837 (&cairo_output, im, im->ximg * im->zoom, im->yimg * im->zoom);
3838 break;
3839 case IF_SVG:
3840 im->gridfit = 0;
3841 im->surface = strlen(im->graphfile)
3842 ?
3843 cairo_svg_surface_create(im->
3844 graphfile,
3845 im->ximg * im->zoom, im->yimg * im->zoom)
3846 : cairo_svg_surface_create_for_stream
3847 (&cairo_output, im, im->ximg * im->zoom, im->yimg * im->zoom);
3848 cairo_svg_surface_restrict_to_version
3849 (im->surface, CAIRO_SVG_VERSION_1_1);
3850 break;
3851 case IF_XML:
3852 case IF_XMLENUM:
3853 case IF_CSV:
3854 case IF_TSV:
3855 case IF_SSV:
3856 case IF_JSON:
3857 case IF_JSONTIME:
3858 break;
3859 };
3860 cairo_destroy(im->cr);
3861 im->cr = cairo_create(im->surface);
3862 cairo_set_antialias(im->cr, im->graph_antialias);
3863 cairo_scale(im->cr, im->zoom, im->zoom);
3864 // pango_cairo_font_map_set_resolution(PANGO_CAIRO_FONT_MAP(font_map), 100);
3865 gfx_new_area(im, 0, 0, 0, im->yimg,
3866 im->ximg, im->yimg, im->graph_col[GRC_BACK]);
3867 gfx_add_point(im, im->ximg, 0);
3868 gfx_close_path(im);
3869 gfx_new_area(im, im->xorigin,
3870 im->yorigin,
3871 im->xorigin +
3872 im->xsize, im->yorigin,
3873 im->xorigin +
3874 im->xsize,
3875 im->yorigin - im->ysize, im->graph_col[GRC_CANVAS]);
3876 gfx_add_point(im, im->xorigin, im->yorigin - im->ysize);
3877 gfx_close_path(im);
3878 cairo_rectangle(im->cr, im->xorigin, im->yorigin - im->ysize - 1.0,
3879 im->xsize, im->ysize + 2.0);
3880 cairo_clip(im->cr);
3881 return 0;
3882 }
3884 int graph_cairo_finish (image_desc_t *im)
3885 {
3887 switch (im->imgformat) {
3888 case IF_PNG:
3889 {
3890 cairo_status_t status;
3892 status = strlen(im->graphfile) ?
3893 cairo_surface_write_to_png(im->surface, im->graphfile)
3894 : cairo_surface_write_to_png_stream(im->surface, &cairo_output,
3895 im);
3897 if (status != CAIRO_STATUS_SUCCESS) {
3898 rrd_set_error("Could not save png to '%s'", im->graphfile);
3899 return 1;
3900 }
3901 break;
3902 }
3903 case IF_XML:
3904 case IF_XMLENUM:
3905 case IF_CSV:
3906 case IF_TSV:
3907 case IF_SSV:
3908 case IF_JSON:
3909 case IF_JSONTIME:
3910 break;
3911 default:
3912 if (strlen(im->graphfile)) {
3913 cairo_show_page(im->cr);
3914 } else {
3915 cairo_surface_finish(im->surface);
3916 }
3917 break;
3918 }
3920 return 0;
3921 }
3923 int graph_paint_xy(
3924 image_desc_t *im, int lazy)
3925 {
3926 rrd_set_error("XY diagramm not implemented");
3927 return -1;
3928 }
3930 /*****************************************************
3931 * graph stuff
3932 *****************************************************/
3934 int gdes_alloc(
3935 image_desc_t *im)
3936 {
3938 im->gdes_c++;
3939 if ((im->gdes = (graph_desc_t *)
3940 rrd_realloc(im->gdes, (im->gdes_c)
3941 * sizeof(graph_desc_t))) == NULL) {
3942 rrd_set_error("realloc graph_descs");
3943 return -1;
3944 }
3947 im->gdes[im->gdes_c - 1].step = im->step;
3948 im->gdes[im->gdes_c - 1].step_orig = im->step;
3949 im->gdes[im->gdes_c - 1].stack = 0;
3950 im->gdes[im->gdes_c - 1].linewidth = 0;
3951 im->gdes[im->gdes_c - 1].debug = 0;
3952 im->gdes[im->gdes_c - 1].start = im->start;
3953 im->gdes[im->gdes_c - 1].start_orig = im->start;
3954 im->gdes[im->gdes_c - 1].end = im->end;
3955 im->gdes[im->gdes_c - 1].end_orig = im->end;
3956 im->gdes[im->gdes_c - 1].vname[0] = '\0';
3957 im->gdes[im->gdes_c - 1].data = NULL;
3958 im->gdes[im->gdes_c - 1].ds_namv = NULL;
3959 im->gdes[im->gdes_c - 1].data_first = 0;
3960 im->gdes[im->gdes_c - 1].p_data = NULL;
3961 im->gdes[im->gdes_c - 1].rpnp = NULL;
3962 im->gdes[im->gdes_c - 1].p_dashes = NULL;
3963 im->gdes[im->gdes_c - 1].shift = 0.0;
3964 im->gdes[im->gdes_c - 1].dash = 0;
3965 im->gdes[im->gdes_c - 1].ndash = 0;
3966 im->gdes[im->gdes_c - 1].offset = 0;
3967 im->gdes[im->gdes_c - 1].col.red = 0.0;
3968 im->gdes[im->gdes_c - 1].col.green = 0.0;
3969 im->gdes[im->gdes_c - 1].col.blue = 0.0;
3970 im->gdes[im->gdes_c - 1].col.alpha = 0.0;
3971 im->gdes[im->gdes_c - 1].col2.red = 0.0;
3972 im->gdes[im->gdes_c - 1].col2.green = 0.0;
3973 im->gdes[im->gdes_c - 1].col2.blue = 0.0;
3974 im->gdes[im->gdes_c - 1].col2.alpha = 0.0;
3975 im->gdes[im->gdes_c - 1].gradheight = 50.0;
3976 im->gdes[im->gdes_c - 1].legend[0] = '\0';
3977 im->gdes[im->gdes_c - 1].format[0] = '\0';
3978 im->gdes[im->gdes_c - 1].strftm = 0;
3979 im->gdes[im->gdes_c - 1].rrd[0] = '\0';
3980 im->gdes[im->gdes_c - 1].ds = -1;
3981 im->gdes[im->gdes_c - 1].cf_reduce = CF_AVERAGE;
3982 im->gdes[im->gdes_c - 1].cf = CF_AVERAGE;
3983 im->gdes[im->gdes_c - 1].yrule = DNAN;
3984 im->gdes[im->gdes_c - 1].xrule = 0;
3985 im->gdes[im->gdes_c - 1].daemon[0] = 0;
3986 return 0;
3987 }
3989 /* copies input untill the first unescaped colon is found
3990 or until input ends. backslashes have to be escaped as well */
3991 int scan_for_col(
3992 const char *const input,
3993 int len,
3994 char *const output)
3995 {
3996 int inp, outp = 0;
3998 for (inp = 0; inp < len && input[inp] != ':' && input[inp] != '\0'; inp++) {
3999 if (input[inp] == '\\'
4000 && input[inp + 1] != '\0'
4001 && (input[inp + 1] == '\\' || input[inp + 1] == ':')) {
4002 output[outp++] = input[++inp];
4003 } else {
4004 output[outp++] = input[inp];
4005 }
4006 }
4007 output[outp] = '\0';
4008 return inp;
4009 }
4011 /* Now just a wrapper around rrd_graph_v */
4012 int rrd_graph(
4013 int argc,
4014 char **argv,
4015 char ***prdata,
4016 int *xsize,
4017 int *ysize,
4018 FILE * stream,
4019 double *ymin,
4020 double *ymax)
4021 {
4022 int prlines = 0;
4023 rrd_info_t *grinfo = NULL;
4024 rrd_info_t *walker;
4026 grinfo = rrd_graph_v(argc, argv);
4027 if (grinfo == NULL)
4028 return -1;
4029 walker = grinfo;
4030 (*prdata) = NULL;
4031 while (walker) {
4032 if (strcmp(walker->key, "image_info") == 0) {
4033 prlines++;
4034 if (((*prdata) =
4035 (char**)rrd_realloc((*prdata),
4036 (prlines + 1) * sizeof(char *))) == NULL) {
4037 rrd_set_error("realloc prdata");
4038 return 0;
4039 }
4040 /* imginfo goes to position 0 in the prdata array */
4041 (*prdata)[prlines - 1] = (char*)malloc((strlen(walker->value.u_str)
4042 + 2) * sizeof(char));
4043 strcpy((*prdata)[prlines - 1], walker->value.u_str);
4044 (*prdata)[prlines] = NULL;
4045 }
4046 /* skip anything else */
4047 walker = walker->next;
4048 }
4049 walker = grinfo;
4050 *xsize = 0;
4051 *ysize = 0;
4052 *ymin = 0;
4053 *ymax = 0;
4054 while (walker) {
4055 if (strcmp(walker->key, "image_width") == 0) {
4056 *xsize = walker->value.u_cnt;
4057 } else if (strcmp(walker->key, "image_height") == 0) {
4058 *ysize = walker->value.u_cnt;
4059 } else if (strcmp(walker->key, "value_min") == 0) {
4060 *ymin = walker->value.u_val;
4061 } else if (strcmp(walker->key, "value_max") == 0) {
4062 *ymax = walker->value.u_val;
4063 } else if (strncmp(walker->key, "print", 5) == 0) { /* keys are prdate[0..] */
4064 prlines++;
4065 if (((*prdata) =
4066 (char**)rrd_realloc((*prdata),
4067 (prlines + 1) * sizeof(char *))) == NULL) {
4068 rrd_set_error("realloc prdata");
4069 return 0;
4070 }
4071 (*prdata)[prlines - 1] = (char*)malloc((strlen(walker->value.u_str)
4072 + 2) * sizeof(char));
4073 (*prdata)[prlines] = NULL;
4074 strcpy((*prdata)[prlines - 1], walker->value.u_str);
4075 } else if (strcmp(walker->key, "image") == 0) {
4076 if ( fwrite(walker->value.u_blo.ptr, walker->value.u_blo.size, 1,
4077 (stream ? stream : stdout)) == 0 && ferror(stream ? stream : stdout)){
4078 rrd_set_error("writing image");
4079 return 0;
4080 }
4081 }
4082 /* skip anything else */
4083 walker = walker->next;
4084 }
4085 rrd_info_free(grinfo);
4086 return 0;
4087 }
4090 /* Some surgery done on this function, it became ridiculously big.
4091 ** Things moved:
4092 ** - initializing now in rrd_graph_init()
4093 ** - options parsing now in rrd_graph_options()
4094 ** - script parsing now in rrd_graph_script()
4095 */
4097 rrd_info_t *rrd_graph_v(
4098 int argc,
4099 char **argv)
4100 {
4101 image_desc_t im;
4102 rrd_info_t *grinfo;
4103 char *old_locale;
4104 rrd_graph_init(&im);
4105 /* a dummy surface so that we can measure text sizes for placements */
4106 old_locale = setlocale(LC_NUMERIC, NULL);
4107 setlocale(LC_NUMERIC, "C");
4108 rrd_graph_options(argc, argv, &im);
4109 if (rrd_test_error()) {
4110 setlocale(LC_NUMERIC, old_locale); /* reenable locale */
4111 rrd_info_free(im.grinfo);
4112 im_free(&im);
4113 return NULL;
4114 }
4116 if (optind >= argc) {
4117 setlocale(LC_NUMERIC, old_locale); /* reenable locale */
4118 rrd_info_free(im.grinfo);
4119 im_free(&im);
4120 rrd_set_error("missing filename");
4121 return NULL;
4122 }
4124 if (strlen(argv[optind]) >= MAXPATH) {
4125 setlocale(LC_NUMERIC, old_locale); /* reenable locale */
4126 rrd_set_error("filename (including path) too long");
4127 rrd_info_free(im.grinfo);
4128 im_free(&im);
4129 return NULL;
4130 }
4132 strncpy(im.graphfile, argv[optind], MAXPATH - 1);
4133 im.graphfile[MAXPATH - 1] = '\0';
4135 if (strcmp(im.graphfile, "-") == 0) {
4136 im.graphfile[0] = '\0';
4137 }
4139 rrd_graph_script(argc, argv, &im, 1);
4140 setlocale(LC_NUMERIC, old_locale); /* reenable locale for rendering the graph */
4142 if (rrd_test_error()) {
4143 rrd_info_free(im.grinfo);
4144 im_free(&im);
4145 return NULL;
4146 }
4148 /* Everything is now read and the actual work can start */
4149 if (graph_paint(&im) == -1) {
4150 rrd_info_free(im.grinfo);
4151 im_free(&im);
4152 return NULL;
4153 }
4155 /* The image is generated and needs to be output.
4156 ** Also, if needed, print a line with information about the image.
4157 */
4159 if (im.imginfo) {
4160 rrd_infoval_t info;
4161 char *path;
4162 char *filename;
4164 path = strdup(im.graphfile);
4165 filename = basename(path);
4166 info.u_str =
4167 sprintf_alloc(im.imginfo,
4168 filename,
4169 (long) (im.zoom *
4170 im.ximg), (long) (im.zoom * im.yimg));
4171 grinfo_push(&im, sprintf_alloc("image_info"), RD_I_STR, info);
4172 free(info.u_str);
4173 free(path);
4174 }
4175 if (im.rendered_image) {
4176 rrd_infoval_t img;
4178 img.u_blo.size = im.rendered_image_size;
4179 img.u_blo.ptr = im.rendered_image;
4180 grinfo_push(&im, sprintf_alloc("image"), RD_I_BLO, img);
4181 }
4182 grinfo = im.grinfo;
4183 im_free(&im);
4184 return grinfo;
4185 }
4187 static void
4188 rrd_set_font_desc (
4189 image_desc_t *im,int prop,char *font, double size ){
4190 if (font){
4191 strncpy(im->text_prop[prop].font, font, sizeof(text_prop[prop].font) - 1);
4192 im->text_prop[prop].font[sizeof(text_prop[prop].font) - 1] = '\0';
4193 /* if we already got one, drop it first */
4194 pango_font_description_free(im->text_prop[prop].font_desc);
4195 im->text_prop[prop].font_desc = pango_font_description_from_string( font );
4196 };
4197 if (size > 0){
4198 im->text_prop[prop].size = size;
4199 };
4200 if (im->text_prop[prop].font_desc && im->text_prop[prop].size ){
4201 pango_font_description_set_size(im->text_prop[prop].font_desc, im->text_prop[prop].size * PANGO_SCALE);
4202 };
4203 }
4205 void rrd_graph_init(
4206 image_desc_t
4207 *im)
4208 {
4209 unsigned int i;
4210 char *deffont = getenv("RRD_DEFAULT_FONT");
4211 static PangoFontMap *fontmap = NULL;
4212 PangoContext *context;
4214 /* zero the whole structure first */
4215 memset(im,0,sizeof(image_desc_t));
4217 #ifdef HAVE_TZSET
4218 tzset();
4219 #endif
4220 im->graph_type = GTYPE_TIME;
4221 im->base = 1000;
4222 im->daemon_addr = NULL;
4223 im->draw_x_grid = 1;
4224 im->draw_y_grid = 1;
4225 im->draw_3d_border = 2;
4226 im->dynamic_labels = 0;
4227 im->extra_flags = 0;
4228 im->font_options = cairo_font_options_create();
4229 im->forceleftspace = 0;
4230 im->gdes_c = 0;
4231 im->gdes = NULL;
4232 im->graph_antialias = CAIRO_ANTIALIAS_GRAY;
4233 im->grid_dash_off = 1;
4234 im->grid_dash_on = 1;
4235 im->gridfit = 1;
4236 im->grinfo = (rrd_info_t *) NULL;
4237 im->grinfo_current = (rrd_info_t *) NULL;
4238 im->imgformat = IF_PNG;
4239 im->imginfo = NULL;
4240 im->lazy = 0;
4241 im->legenddirection = TOP_DOWN;
4242 im->legendheight = 0;
4243 im->legendposition = SOUTH;
4244 im->legendwidth = 0;
4245 im->logarithmic = 0;
4246 im->maxval = DNAN;
4247 im->minval = 0;
4248 im->minval = DNAN;
4249 im->magfact = 1;
4250 im->prt_c = 0;
4251 im->rigid = 0;
4252 im->rendered_image_size = 0;
4253 im->rendered_image = NULL;
4254 im->slopemode = 0;
4255 im->step = 0;
4256 im->symbol = ' ';
4257 im->tabwidth = 40.0;
4258 im->title[0] = '\0';
4259 im->unitsexponent = 9999;
4260 im->unitslength = 6;
4261 im->viewfactor = 1.0;
4262 im->watermark[0] = '\0';
4263 im->with_markup = 0;
4264 im->ximg = 0;
4265 im->xlab_user.minsec = -1;
4266 im->xorigin = 0;
4267 im->xOriginLegend = 0;
4268 im->xOriginLegendY = 0;
4269 im->xOriginLegendY2 = 0;
4270 im->xOriginTitle = 0;
4271 im->xsize = 400;
4272 im->ygridstep = DNAN;
4273 im->yimg = 0;
4274 im->ylegend[0] = '\0';
4275 im->second_axis_scale = 0; /* 0 disables it */
4276 im->second_axis_shift = 0; /* no shift by default */
4277 im->second_axis_legend[0] = '\0';
4278 im->second_axis_format[0] = '\0';
4279 im->yorigin = 0;
4280 im->yOriginLegend = 0;
4281 im->yOriginLegendY = 0;
4282 im->yOriginLegendY2 = 0;
4283 im->yOriginTitle = 0;
4284 im->ysize = 100;
4285 im->zoom = 1;
4287 im->surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, 10, 10);
4288 im->cr = cairo_create(im->surface);
4290 for (i = 0; i < DIM(text_prop); i++) {
4291 im->text_prop[i].size = -1;
4292 im->text_prop[i].font_desc = NULL;
4293 rrd_set_font_desc(im,i, deffont ? deffont : text_prop[i].font,text_prop[i].size);
4294 }
4296 if (fontmap == NULL){
4297 fontmap = pango_cairo_font_map_get_default();
4298 }
4300 context = pango_cairo_font_map_create_context((PangoCairoFontMap*)fontmap);
4302 pango_cairo_context_set_resolution(context, 100);
4304 pango_cairo_update_context(im->cr,context);
4306 im->layout = pango_layout_new(context);
4307 g_object_unref (context);
4309 // im->layout = pango_cairo_create_layout(im->cr);
4312 cairo_font_options_set_hint_style
4313 (im->font_options, CAIRO_HINT_STYLE_FULL);
4314 cairo_font_options_set_hint_metrics
4315 (im->font_options, CAIRO_HINT_METRICS_ON);
4316 cairo_font_options_set_antialias(im->font_options, CAIRO_ANTIALIAS_GRAY);
4320 for (i = 0; i < DIM(graph_col); i++)
4321 im->graph_col[i] = graph_col[i];
4324 }
4327 void rrd_graph_options(
4328 int argc,
4329 char *argv[],
4330 image_desc_t
4331 *im)
4332 {
4333 int stroff;
4334 char *parsetime_error = NULL;
4335 char scan_gtm[12], scan_mtm[12], scan_ltm[12], col_nam[12];
4336 time_t start_tmp = 0, end_tmp = 0;
4337 long long_tmp;
4338 rrd_time_value_t start_tv, end_tv;
4339 long unsigned int color;
4341 /* defines for long options without a short equivalent. should be bytes,
4342 and may not collide with (the ASCII value of) short options */
4343 #define LONGOPT_UNITS_SI 255
4345 /* *INDENT-OFF* */
4346 struct option long_options[] = {
4347 { "alt-autoscale", no_argument, 0, 'A'},
4348 { "imgformat", required_argument, 0, 'a'},
4349 { "font-smoothing-threshold", required_argument, 0, 'B'},
4350 { "base", required_argument, 0, 'b'},
4351 { "color", required_argument, 0, 'c'},
4352 { "full-size-mode", no_argument, 0, 'D'},
4353 { "daemon", required_argument, 0, 'd'},
4354 { "slope-mode", no_argument, 0, 'E'},
4355 { "end", required_argument, 0, 'e'},
4356 { "force-rules-legend", no_argument, 0, 'F'},
4357 { "imginfo", required_argument, 0, 'f'},
4358 { "graph-render-mode", required_argument, 0, 'G'},
4359 { "no-legend", no_argument, 0, 'g'},
4360 { "height", required_argument, 0, 'h'},
4361 { "no-minor", no_argument, 0, 'I'},
4362 { "interlaced", no_argument, 0, 'i'},
4363 { "alt-autoscale-min", no_argument, 0, 'J'},
4364 { "only-graph", no_argument, 0, 'j'},
4365 { "units-length", required_argument, 0, 'L'},
4366 { "lower-limit", required_argument, 0, 'l'},
4367 { "alt-autoscale-max", no_argument, 0, 'M'},
4368 { "zoom", required_argument, 0, 'm'},
4369 { "no-gridfit", no_argument, 0, 'N'},
4370 { "font", required_argument, 0, 'n'},
4371 { "logarithmic", no_argument, 0, 'o'},
4372 { "pango-markup", no_argument, 0, 'P'},
4373 { "font-render-mode", required_argument, 0, 'R'},
4374 { "rigid", no_argument, 0, 'r'},
4375 { "step", required_argument, 0, 'S'},
4376 { "start", required_argument, 0, 's'},
4377 { "tabwidth", required_argument, 0, 'T'},
4378 { "title", required_argument, 0, 't'},
4379 { "upper-limit", required_argument, 0, 'u'},
4380 { "vertical-label", required_argument, 0, 'v'},
4381 { "watermark", required_argument, 0, 'W'},
4382 { "width", required_argument, 0, 'w'},
4383 { "units-exponent", required_argument, 0, 'X'},
4384 { "x-grid", required_argument, 0, 'x'},
4385 { "alt-y-grid", no_argument, 0, 'Y'},
4386 { "y-grid", required_argument, 0, 'y'},
4387 { "lazy", no_argument, 0, 'z'},
4388 { "units", required_argument, 0, LONGOPT_UNITS_SI},
4389 { "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 */
4390 { "disable-rrdtool-tag",no_argument, 0, 1001},
4391 { "right-axis", required_argument, 0, 1002},
4392 { "right-axis-label", required_argument, 0, 1003},
4393 { "right-axis-format", required_argument, 0, 1004},
4394 { "legend-position", required_argument, 0, 1005},
4395 { "legend-direction", required_argument, 0, 1006},
4396 { "border", required_argument, 0, 1007},
4397 { "grid-dash", required_argument, 0, 1008},
4398 { "dynamic-labels", no_argument, 0, 1009},
4399 { "week-fmt", required_argument, 0, 1010},
4400 { "graph-type", required_argument, 0, 1011},
4401 { 0, 0, 0, 0}
4402 };
4403 /* *INDENT-ON* */
4405 optind = 0;
4406 opterr = 0; /* initialize getopt */
4407 rrd_parsetime("end-24h", &start_tv);
4408 rrd_parsetime("now", &end_tv);
4409 while (1) {
4410 int option_index = 0;
4411 int opt;
4412 int col_start, col_end;
4414 opt = getopt_long(argc, argv,
4415 "Aa:B:b:c:Dd:Ee:Ff:G:gh:IiJjL:l:Mm:Nn:oPR:rS:s:T:t:u:v:W:w:X:x:Yy:z",
4416 long_options, &option_index);
4417 if (opt == EOF)
4418 break;
4419 switch (opt) {
4420 case 'I':
4421 im->extra_flags |= NOMINOR;
4422 break;
4423 case 'Y':
4424 im->extra_flags |= ALTYGRID;
4425 break;
4426 case 'A':
4427 im->extra_flags |= ALTAUTOSCALE;
4428 break;
4429 case 'J':
4430 im->extra_flags |= ALTAUTOSCALE_MIN;
4431 break;
4432 case 'M':
4433 im->extra_flags |= ALTAUTOSCALE_MAX;
4434 break;
4435 case 'j':
4436 im->extra_flags |= ONLY_GRAPH;
4437 break;
4438 case 'g':
4439 im->extra_flags |= NOLEGEND;
4440 break;
4441 case 1005:
4442 if (strcmp(optarg, "north") == 0) {
4443 im->legendposition = NORTH;
4444 } else if (strcmp(optarg, "west") == 0) {
4445 im->legendposition = WEST;
4446 } else if (strcmp(optarg, "south") == 0) {
4447 im->legendposition = SOUTH;
4448 } else if (strcmp(optarg, "east") == 0) {
4449 im->legendposition = EAST;
4450 } else {
4451 rrd_set_error("unknown legend-position '%s'", optarg);
4452 return;
4453 }
4454 break;
4455 case 1006:
4456 if (strcmp(optarg, "topdown") == 0) {
4457 im->legenddirection = TOP_DOWN;
4458 } else if (strcmp(optarg, "bottomup") == 0) {
4459 im->legenddirection = BOTTOM_UP;
4460 } else {
4461 rrd_set_error("unknown legend-position '%s'", optarg);
4462 return;
4463 }
4464 break;
4465 case 'F':
4466 im->extra_flags |= FORCE_RULES_LEGEND;
4467 break;
4468 case 1001:
4469 im->extra_flags |= NO_RRDTOOL_TAG;
4470 break;
4471 case LONGOPT_UNITS_SI:
4472 if (im->extra_flags & FORCE_UNITS) {
4473 rrd_set_error("--units can only be used once!");
4474 return;
4475 }
4476 if (strcmp(optarg, "si") == 0)
4477 im->extra_flags |= FORCE_UNITS_SI;
4478 else {
4479 rrd_set_error("invalid argument for --units: %s", optarg);
4480 return;
4481 }
4482 break;
4483 case 'X':
4484 im->unitsexponent = atoi(optarg);
4485 break;
4486 case 'L':
4487 im->unitslength = atoi(optarg);
4488 im->forceleftspace = 1;
4489 break;
4490 case 'T':
4491 im->tabwidth = atof(optarg);
4492 break;
4493 case 'S':
4494 im->step = atoi(optarg);
4495 break;
4496 case 'N':
4497 im->gridfit = 0;
4498 break;
4499 case 'P':
4500 im->with_markup = 1;
4501 break;
4502 case 's':
4503 if ((parsetime_error = rrd_parsetime(optarg, &start_tv))) {
4504 rrd_set_error("start time: %s", parsetime_error);
4505 return;
4506 }
4507 break;
4508 case 'e':
4509 if ((parsetime_error = rrd_parsetime(optarg, &end_tv))) {
4510 rrd_set_error("end time: %s", parsetime_error);
4511 return;
4512 }
4513 break;
4514 case 'x':
4515 if (strcmp(optarg, "none") == 0) {
4516 im->draw_x_grid = 0;
4517 break;
4518 };
4519 if (sscanf(optarg,
4520 "%10[A-Z]:%ld:%10[A-Z]:%ld:%10[A-Z]:%ld:%ld:%n",
4521 scan_gtm,
4522 &im->xlab_user.gridst,
4523 scan_mtm,
4524 &im->xlab_user.mgridst,
4525 scan_ltm,
4526 &im->xlab_user.labst,
4527 &im->xlab_user.precis, &stroff) == 7 && stroff != 0) {
4528 strncpy(im->xlab_form, optarg + stroff,
4529 sizeof(im->xlab_form) - 1);
4530 im->xlab_form[sizeof(im->xlab_form) - 1] = '\0';
4531 if ((int)
4532 (im->xlab_user.gridtm = tmt_conv(scan_gtm)) == -1) {
4533 rrd_set_error("unknown keyword %s", scan_gtm);
4534 return;
4535 } else if ((int)
4536 (im->xlab_user.mgridtm = tmt_conv(scan_mtm))
4537 == -1) {
4538 rrd_set_error("unknown keyword %s", scan_mtm);
4539 return;
4540 } else if ((int)
4541 (im->xlab_user.labtm = tmt_conv(scan_ltm)) == -1) {
4542 rrd_set_error("unknown keyword %s", scan_ltm);
4543 return;
4544 }
4545 im->xlab_user.minsec = 1;
4546 im->xlab_user.stst = im->xlab_form;
4547 } else {
4548 rrd_set_error("invalid x-grid format");
4549 return;
4550 }
4551 break;
4552 case 'y':
4554 if (strcmp(optarg, "none") == 0) {
4555 im->draw_y_grid = 0;
4556 break;
4557 };
4558 if (sscanf(optarg, "%lf:%d", &im->ygridstep, &im->ylabfact) == 2) {
4559 if (im->ygridstep <= 0) {
4560 rrd_set_error("grid step must be > 0");
4561 return;
4562 } else if (im->ylabfact < 1) {
4563 rrd_set_error("label factor must be > 0");
4564 return;
4565 }
4566 } else {
4567 rrd_set_error("invalid y-grid format");
4568 return;
4569 }
4570 break;
4571 case 1007:
4572 im->draw_3d_border = atoi(optarg);
4573 break;
4574 case 1008: /* grid-dash */
4575 if(sscanf(optarg,
4576 "%lf:%lf",
4577 &im->grid_dash_on,
4578 &im->grid_dash_off) != 2) {
4579 rrd_set_error("expected grid-dash format float:float");
4580 return;
4581 }
4582 break;
4583 case 1009: /* enable dynamic labels */
4584 im->dynamic_labels = 1;
4585 break;
4586 case 1010:
4587 strncpy(week_fmt,optarg,sizeof week_fmt);
4588 week_fmt[(sizeof week_fmt)-1]='\0';
4589 break;
4590 case 1002: /* right y axis */
4592 if(sscanf(optarg,
4593 "%lf:%lf",
4594 &im->second_axis_scale,
4595 &im->second_axis_shift) == 2) {
4596 if(im->second_axis_scale==0){
4597 rrd_set_error("the second_axis_scale must not be 0");
4598 return;
4599 }
4600 } else {
4601 rrd_set_error("invalid right-axis format expected scale:shift");
4602 return;
4603 }
4604 break;
4605 case 1003:
4606 strncpy(im->second_axis_legend,optarg,150);
4607 im->second_axis_legend[150]='\0';
4608 break;
4609 case 1004:
4610 if (bad_format(optarg)){
4611 rrd_set_error("use either %le or %lf formats");
4612 return;
4613 }
4614 strncpy(im->second_axis_format,optarg,150);
4615 im->second_axis_format[150]='\0';
4616 break;
4617 case 'v':
4618 strncpy(im->ylegend, optarg, 150);
4619 im->ylegend[150] = '\0';
4620 break;
4621 case 'u':
4622 im->maxval = atof(optarg);
4623 break;
4624 case 'l':
4625 im->minval = atof(optarg);
4626 break;
4627 case 'b':
4628 im->base = atol(optarg);
4629 if (im->base != 1024 && im->base != 1000) {
4630 rrd_set_error
4631 ("the only sensible value for base apart from 1000 is 1024");
4632 return;
4633 }
4634 break;
4635 case 'w':
4636 long_tmp = atol(optarg);
4637 if (long_tmp < 10) {
4638 rrd_set_error("width below 10 pixels");
4639 return;
4640 }
4641 im->xsize = long_tmp;
4642 break;
4643 case 'h':
4644 long_tmp = atol(optarg);
4645 if (long_tmp < 10) {
4646 rrd_set_error("height below 10 pixels");
4647 return;
4648 }
4649 im->ysize = long_tmp;
4650 break;
4651 case 'D':
4652 im->extra_flags |= FULL_SIZE_MODE;
4653 break;
4654 case 'i':
4655 /* interlaced png not supported at the moment */
4656 break;
4657 case 'r':
4658 im->rigid = 1;
4659 break;
4660 case 'f':
4661 im->imginfo = optarg;
4662 break;
4663 case 'a':
4664 if ((int)
4665 (im->imgformat = if_conv(optarg)) == -1) {
4666 rrd_set_error("unsupported graphics format '%s'", optarg);
4667 return;
4668 }
4669 break;
4670 case 1011:
4671 if ((int)
4672 (im->graph_type = type_conv(optarg)) == -1) {
4673 rrd_set_error("unsupported graphics type '%s'", optarg);
4674 return;
4675 }
4676 break;
4677 case 'z':
4678 im->lazy = 1;
4679 break;
4680 case 'E':
4681 im->slopemode = 1;
4682 break;
4683 case 'o':
4684 im->logarithmic = 1;
4685 break;
4686 case 'c':
4687 if (sscanf(optarg,
4688 "%10[A-Z]#%n%8lx%n",
4689 col_nam, &col_start, &color, &col_end) == 2) {
4690 int ci;
4691 int col_len = col_end - col_start;
4693 switch (col_len) {
4694 case 3:
4695 color =
4696 (((color & 0xF00) * 0x110000) | ((color & 0x0F0) *
4697 0x011000) |
4698 ((color & 0x00F)
4699 * 0x001100)
4700 | 0x000000FF);
4701 break;
4702 case 4:
4703 color =
4704 (((color & 0xF000) *
4705 0x11000) | ((color & 0x0F00) *
4706 0x01100) | ((color &
4707 0x00F0) *
4708 0x00110) |
4709 ((color & 0x000F) * 0x00011)
4710 );
4711 break;
4712 case 6:
4713 color = (color << 8) + 0xff /* shift left by 8 */ ;
4714 break;
4715 case 8:
4716 break;
4717 default:
4718 rrd_set_error("the color format is #RRGGBB[AA]");
4719 return;
4720 }
4721 if ((ci = grc_conv(col_nam)) != -1) {
4722 im->graph_col[ci] = gfx_hex_to_col(color);
4723 } else {
4724 rrd_set_error("invalid color name '%s'", col_nam);
4725 return;
4726 }
4727 } else {
4728 rrd_set_error("invalid color def format");
4729 return;
4730 }
4731 break;
4732 case 'n':{
4733 char prop[15];
4734 double size = 1;
4735 int end;
4737 if (sscanf(optarg, "%10[A-Z]:%lf%n", prop, &size, &end) >= 2) {
4738 int sindex, propidx;
4740 if ((sindex = text_prop_conv(prop)) != -1) {
4741 for (propidx = sindex;
4742 propidx < TEXT_PROP_LAST; propidx++) {
4743 if (size > 0) {
4744 rrd_set_font_desc(im,propidx,NULL,size);
4745 }
4746 if ((int) strlen(optarg) > end+2) {
4747 if (optarg[end] == ':') {
4748 rrd_set_font_desc(im,propidx,optarg + end + 1,0);
4749 } else {
4750 rrd_set_error
4751 ("expected : after font size in '%s'",
4752 optarg);
4753 return;
4754 }
4755 }
4756 /* only run the for loop for DEFAULT (0) for
4757 all others, we break here. woodo programming */
4758 if (propidx == sindex && sindex != 0)
4759 break;
4760 }
4761 } else {
4762 rrd_set_error("invalid fonttag '%s'", prop);
4763 return;
4764 }
4765 } else {
4766 rrd_set_error("invalid text property format");
4767 return;
4768 }
4769 break;
4770 }
4771 case 'm':
4772 im->zoom = atof(optarg);
4773 if (im->zoom <= 0.0) {
4774 rrd_set_error("zoom factor must be > 0");
4775 return;
4776 }
4777 break;
4778 case 't':
4779 strncpy(im->title, optarg, 150);
4780 im->title[150] = '\0';
4781 break;
4782 case 'R':
4783 if (strcmp(optarg, "normal") == 0) {
4784 cairo_font_options_set_antialias
4785 (im->font_options, CAIRO_ANTIALIAS_GRAY);
4786 cairo_font_options_set_hint_style
4787 (im->font_options, CAIRO_HINT_STYLE_FULL);
4788 } else if (strcmp(optarg, "light") == 0) {
4789 cairo_font_options_set_antialias
4790 (im->font_options, CAIRO_ANTIALIAS_GRAY);
4791 cairo_font_options_set_hint_style
4792 (im->font_options, CAIRO_HINT_STYLE_SLIGHT);
4793 } else if (strcmp(optarg, "mono") == 0) {
4794 cairo_font_options_set_antialias
4795 (im->font_options, CAIRO_ANTIALIAS_NONE);
4796 cairo_font_options_set_hint_style
4797 (im->font_options, CAIRO_HINT_STYLE_FULL);
4798 } else {
4799 rrd_set_error("unknown font-render-mode '%s'", optarg);
4800 return;
4801 }
4802 break;
4803 case 'G':
4804 if (strcmp(optarg, "normal") == 0)
4805 im->graph_antialias = CAIRO_ANTIALIAS_GRAY;
4806 else if (strcmp(optarg, "mono") == 0)
4807 im->graph_antialias = CAIRO_ANTIALIAS_NONE;
4808 else {
4809 rrd_set_error("unknown graph-render-mode '%s'", optarg);
4810 return;
4811 }
4812 break;
4813 case 'B':
4814 /* not supported curently */
4815 break;
4816 case 'W':
4817 strncpy(im->watermark, optarg, 100);
4818 im->watermark[99] = '\0';
4819 break;
4820 case 'd':
4821 {
4822 if (im->daemon_addr != NULL)
4823 {
4824 rrd_set_error ("You cannot specify --daemon "
4825 "more than once.");
4826 return;
4827 }
4829 im->daemon_addr = strdup(optarg);
4830 if (im->daemon_addr == NULL)
4831 {
4832 rrd_set_error("strdup failed");
4833 return;
4834 }
4836 break;
4837 }
4838 case '?':
4839 if (optopt != 0)
4840 rrd_set_error("unknown option '%c'", optopt);
4841 else
4842 rrd_set_error("unknown option '%s'", argv[optind - 1]);
4843 return;
4844 }
4845 } /* while (1) */
4847 pango_cairo_context_set_font_options(pango_layout_get_context(im->layout), im->font_options);
4848 pango_layout_context_changed(im->layout);
4852 if (im->logarithmic && im->minval <= 0) {
4853 rrd_set_error
4854 ("for a logarithmic yaxis you must specify a lower-limit > 0");
4855 return;
4856 }
4858 if (rrd_proc_start_end(&start_tv, &end_tv, &start_tmp, &end_tmp) == -1) {
4859 /* error string is set in rrd_parsetime.c */
4860 return;
4861 }
4863 if (start_tmp < 3600 * 24 * 365 * 10) {
4864 rrd_set_error
4865 ("the first entry to fetch should be after 1980 (%ld)",
4866 start_tmp);
4867 return;
4868 }
4870 if (end_tmp < start_tmp) {
4871 rrd_set_error
4872 ("start (%ld) should be less than end (%ld)", start_tmp, end_tmp);
4873 return;
4874 }
4876 im->start = start_tmp;
4877 im->end = end_tmp;
4878 im->step = max((long) im->step, (im->end - im->start) / im->xsize);
4879 }
4881 int rrd_graph_color(
4882 image_desc_t
4883 *im,
4884 char *var,
4885 char *err,
4886 int optional)
4887 {
4888 char *color;
4889 graph_desc_t *gdp = &im->gdes[im->gdes_c - 1];
4891 color = strstr(var, "#");
4892 if (color == NULL) {
4893 if (optional == 0) {
4894 rrd_set_error("Found no color in %s", err);
4895 return 0;
4896 }
4897 return 0;
4898 } else {
4899 int n = 0;
4900 char *rest;
4901 long unsigned int col;
4903 rest = strstr(color, ":");
4904 if (rest != NULL)
4905 n = rest - color;
4906 else
4907 n = strlen(color);
4908 switch (n) {
4909 case 7:
4910 sscanf(color, "#%6lx%n", &col, &n);
4911 col = (col << 8) + 0xff /* shift left by 8 */ ;
4912 if (n != 7)
4913 rrd_set_error("Color problem in %s", err);
4914 break;
4915 case 9:
4916 sscanf(color, "#%8lx%n", &col, &n);
4917 if (n == 9)
4918 break;
4919 default:
4920 rrd_set_error("Color problem in %s", err);
4921 }
4922 if (rrd_test_error())
4923 return 0;
4924 gdp->col = gfx_hex_to_col(col);
4925 return n;
4926 }
4927 }
4930 int bad_format(
4931 char *fmt)
4932 {
4933 char *ptr;
4934 int n = 0;
4936 ptr = fmt;
4937 while (*ptr != '\0')
4938 if (*ptr++ == '%') {
4940 /* line cannot end with percent char */
4941 if (*ptr == '\0')
4942 return 1;
4943 /* '%s', '%S' and '%%' are allowed */
4944 if (*ptr == 's' || *ptr == 'S' || *ptr == '%')
4945 ptr++;
4946 /* %c is allowed (but use only with vdef!) */
4947 else if (*ptr == 'c') {
4948 ptr++;
4949 n = 1;
4950 }
4952 /* or else '% 6.2lf' and such are allowed */
4953 else {
4954 /* optional padding character */
4955 if (*ptr == ' ' || *ptr == '+' || *ptr == '-')
4956 ptr++;
4957 /* This should take care of 'm.n' with all three optional */
4958 while (*ptr >= '0' && *ptr <= '9')
4959 ptr++;
4960 if (*ptr == '.')
4961 ptr++;
4962 while (*ptr >= '0' && *ptr <= '9')
4963 ptr++;
4964 /* Either 'le', 'lf' or 'lg' must follow here */
4965 if (*ptr++ != 'l')
4966 return 1;
4967 if (*ptr == 'e' || *ptr == 'f' || *ptr == 'g')
4968 ptr++;
4969 else
4970 return 1;
4971 n++;
4972 }
4973 }
4975 return (n != 1);
4976 }
4979 int vdef_parse(
4980 struct graph_desc_t
4981 *gdes,
4982 const char *const str)
4983 {
4984 /* A VDEF currently is either "func" or "param,func"
4985 * so the parsing is rather simple. Change if needed.
4986 */
4987 double param;
4988 char func[30];
4989 int n;
4991 n = 0;
4992 sscanf(str, "%le,%29[A-Z]%n", ¶m, func, &n);
4993 if (n == (int) strlen(str)) { /* matched */
4994 ;
4995 } else {
4996 n = 0;
4997 sscanf(str, "%29[A-Z]%n", func, &n);
4998 if (n == (int) strlen(str)) { /* matched */
4999 param = DNAN;
5000 } else {
5001 rrd_set_error
5002 ("Unknown function string '%s' in VDEF '%s'",
5003 str, gdes->vname);
5004 return -1;
5005 }
5006 }
5007 if (!strcmp("PERCENT", func))
5008 gdes->vf.op = VDEF_PERCENT;
5009 else if (!strcmp("PERCENTNAN", func))
5010 gdes->vf.op = VDEF_PERCENTNAN;
5011 else if (!strcmp("MAXIMUM", func))
5012 gdes->vf.op = VDEF_MAXIMUM;
5013 else if (!strcmp("AVERAGE", func))
5014 gdes->vf.op = VDEF_AVERAGE;
5015 else if (!strcmp("STDEV", func))
5016 gdes->vf.op = VDEF_STDEV;
5017 else if (!strcmp("MINIMUM", func))
5018 gdes->vf.op = VDEF_MINIMUM;
5019 else if (!strcmp("TOTAL", func))
5020 gdes->vf.op = VDEF_TOTAL;
5021 else if (!strcmp("FIRST", func))
5022 gdes->vf.op = VDEF_FIRST;
5023 else if (!strcmp("LAST", func))
5024 gdes->vf.op = VDEF_LAST;
5025 else if (!strcmp("LSLSLOPE", func))
5026 gdes->vf.op = VDEF_LSLSLOPE;
5027 else if (!strcmp("LSLINT", func))
5028 gdes->vf.op = VDEF_LSLINT;
5029 else if (!strcmp("LSLCORREL", func))
5030 gdes->vf.op = VDEF_LSLCORREL;
5031 else {
5032 rrd_set_error
5033 ("Unknown function '%s' in VDEF '%s'\n", func, gdes->vname);
5034 return -1;
5035 };
5036 switch (gdes->vf.op) {
5037 case VDEF_PERCENT:
5038 case VDEF_PERCENTNAN:
5039 if (isnan(param)) { /* no parameter given */
5040 rrd_set_error
5041 ("Function '%s' needs parameter in VDEF '%s'\n",
5042 func, gdes->vname);
5043 return -1;
5044 };
5045 if (param >= 0.0 && param <= 100.0) {
5046 gdes->vf.param = param;
5047 gdes->vf.val = DNAN; /* undefined */
5048 gdes->vf.when = 0; /* undefined */
5049 gdes->vf.never = 1;
5050 } else {
5051 rrd_set_error
5052 ("Parameter '%f' out of range in VDEF '%s'\n",
5053 param, gdes->vname);
5054 return -1;
5055 };
5056 break;
5057 case VDEF_MAXIMUM:
5058 case VDEF_AVERAGE:
5059 case VDEF_STDEV:
5060 case VDEF_MINIMUM:
5061 case VDEF_TOTAL:
5062 case VDEF_FIRST:
5063 case VDEF_LAST:
5064 case VDEF_LSLSLOPE:
5065 case VDEF_LSLINT:
5066 case VDEF_LSLCORREL:
5067 if (isnan(param)) {
5068 gdes->vf.param = DNAN;
5069 gdes->vf.val = DNAN;
5070 gdes->vf.when = 0;
5071 gdes->vf.never = 1;
5072 } else {
5073 rrd_set_error
5074 ("Function '%s' needs no parameter in VDEF '%s'\n",
5075 func, gdes->vname);
5076 return -1;
5077 };
5078 break;
5079 };
5080 return 0;
5081 }
5084 int vdef_calc(
5085 image_desc_t *im,
5086 int gdi)
5087 {
5088 graph_desc_t *src, *dst;
5089 rrd_value_t *data;
5090 long step, steps;
5092 dst = &im->gdes[gdi];
5093 src = &im->gdes[dst->vidx];
5094 data = src->data + src->ds;
5096 steps = (src->end - src->start) / src->step;
5097 #if 0
5098 printf
5099 ("DEBUG: start == %lu, end == %lu, %lu steps\n",
5100 src->start, src->end, steps);
5101 #endif
5102 switch (dst->vf.op) {
5103 case VDEF_PERCENT:{
5104 rrd_value_t *array;
5105 int field;
5106 if ((array = (rrd_value_t*)malloc(steps * sizeof(double))) == NULL) {
5107 rrd_set_error("malloc VDEV_PERCENT");
5108 return -1;
5109 }
5110 for (step = 0; step < steps; step++) {
5111 array[step] = data[step * src->ds_cnt];
5112 }
5113 qsort(array, step, sizeof(double), vdef_percent_compar);
5114 field = round((dst->vf.param * (double)(steps - 1)) / 100.0);
5115 dst->vf.val = array[field];
5116 dst->vf.when = 0; /* no time component */
5117 dst->vf.never = 1;
5118 free(array);
5119 #if 0
5120 for (step = 0; step < steps; step++)
5121 printf("DEBUG: %3li:%10.2f %c\n",
5122 step, array[step], step == field ? '*' : ' ');
5123 #endif
5124 }
5125 break;
5126 case VDEF_PERCENTNAN:{
5127 rrd_value_t *array;
5128 int field;
5129 /* count number of "valid" values */
5130 int nancount=0;
5131 for (step = 0; step < steps; step++) {
5132 if (!isnan(data[step * src->ds_cnt])) { nancount++; }
5133 }
5134 /* and allocate it */
5135 if ((array = (rrd_value_t*)malloc(nancount * sizeof(double))) == NULL) {
5136 rrd_set_error("malloc VDEV_PERCENT");
5137 return -1;
5138 }
5139 /* and fill it in */
5140 field=0;
5141 for (step = 0; step < steps; step++) {
5142 if (!isnan(data[step * src->ds_cnt])) {
5143 array[field] = data[step * src->ds_cnt];
5144 field++;
5145 }
5146 }
5147 qsort(array, nancount, sizeof(double), vdef_percent_compar);
5148 field = round( dst->vf.param * (double)(nancount - 1) / 100.0);
5149 dst->vf.val = array[field];
5150 dst->vf.when = 0; /* no time component */
5151 dst->vf.never = 1;
5152 free(array);
5153 }
5154 break;
5155 case VDEF_MAXIMUM:
5156 step = 0;
5157 while (step != steps && isnan(data[step * src->ds_cnt]))
5158 step++;
5159 if (step == steps) {
5160 dst->vf.val = DNAN;
5161 dst->vf.when = 0;
5162 dst->vf.never = 1;
5163 } else {
5164 dst->vf.val = data[step * src->ds_cnt];
5165 dst->vf.when = src->start + (step + 1) * src->step;
5166 dst->vf.never = 0;
5167 }
5168 while (step != steps) {
5169 if (finite(data[step * src->ds_cnt])) {
5170 if (data[step * src->ds_cnt] > dst->vf.val) {
5171 dst->vf.val = data[step * src->ds_cnt];
5172 dst->vf.when = src->start + (step + 1) * src->step;
5173 dst->vf.never = 0;
5174 }
5175 }
5176 step++;
5177 }
5178 break;
5179 case VDEF_TOTAL:
5180 case VDEF_STDEV:
5181 case VDEF_AVERAGE:{
5182 int cnt = 0;
5183 double sum = 0.0;
5184 double average = 0.0;
5186 for (step = 0; step < steps; step++) {
5187 if (finite(data[step * src->ds_cnt])) {
5188 sum += data[step * src->ds_cnt];
5189 cnt++;
5190 };
5191 }
5192 if (cnt) {
5193 if (dst->vf.op == VDEF_TOTAL) {
5194 dst->vf.val = sum * src->step;
5195 dst->vf.when = 0; /* no time component */
5196 dst->vf.never = 1;
5197 } else if (dst->vf.op == VDEF_AVERAGE) {
5198 dst->vf.val = sum / cnt;
5199 dst->vf.when = 0; /* no time component */
5200 dst->vf.never = 1;
5201 } else {
5202 average = sum / cnt;
5203 sum = 0.0;
5204 for (step = 0; step < steps; step++) {
5205 if (finite(data[step * src->ds_cnt])) {
5206 sum += pow((data[step * src->ds_cnt] - average), 2.0);
5207 };
5208 }
5209 dst->vf.val = pow(sum / cnt, 0.5);
5210 dst->vf.when = 0; /* no time component */
5211 dst->vf.never = 1;
5212 };
5213 } else {
5214 dst->vf.val = DNAN;
5215 dst->vf.when = 0;
5216 dst->vf.never = 1;
5217 }
5218 }
5219 break;
5220 case VDEF_MINIMUM:
5221 step = 0;
5222 while (step != steps && isnan(data[step * src->ds_cnt]))
5223 step++;
5224 if (step == steps) {
5225 dst->vf.val = DNAN;
5226 dst->vf.when = 0;
5227 dst->vf.never = 1;
5228 } else {
5229 dst->vf.val = data[step * src->ds_cnt];
5230 dst->vf.when = src->start + (step + 1) * src->step;
5231 dst->vf.never = 0;
5232 }
5233 while (step != steps) {
5234 if (finite(data[step * src->ds_cnt])) {
5235 if (data[step * src->ds_cnt] < dst->vf.val) {
5236 dst->vf.val = data[step * src->ds_cnt];
5237 dst->vf.when = src->start + (step + 1) * src->step;
5238 dst->vf.never = 0;
5239 }
5240 }
5241 step++;
5242 }
5243 break;
5244 case VDEF_FIRST:
5245 /* The time value returned here is one step before the
5246 * actual time value. This is the start of the first
5247 * non-NaN interval.
5248 */
5249 step = 0;
5250 while (step != steps && isnan(data[step * src->ds_cnt]))
5251 step++;
5252 if (step == steps) { /* all entries were NaN */
5253 dst->vf.val = DNAN;
5254 dst->vf.when = 0;
5255 dst->vf.never = 1;
5256 } else {
5257 dst->vf.val = data[step * src->ds_cnt];
5258 dst->vf.when = src->start + step * src->step;
5259 dst->vf.never = 0;
5260 }
5261 break;
5262 case VDEF_LAST:
5263 /* The time value returned here is the
5264 * actual time value. This is the end of the last
5265 * non-NaN interval.
5266 */
5267 step = steps - 1;
5268 while (step >= 0 && isnan(data[step * src->ds_cnt]))
5269 step--;
5270 if (step < 0) { /* all entries were NaN */
5271 dst->vf.val = DNAN;
5272 dst->vf.when = 0;
5273 dst->vf.never = 1;
5274 } else {
5275 dst->vf.val = data[step * src->ds_cnt];
5276 dst->vf.when = src->start + (step + 1) * src->step;
5277 dst->vf.never = 0;
5278 }
5279 break;
5280 case VDEF_LSLSLOPE:
5281 case VDEF_LSLINT:
5282 case VDEF_LSLCORREL:{
5283 /* Bestfit line by linear least squares method */
5285 int cnt = 0;
5286 double SUMx, SUMy, SUMxy, SUMxx, SUMyy, slope, y_intercept, correl;
5288 SUMx = 0;
5289 SUMy = 0;
5290 SUMxy = 0;
5291 SUMxx = 0;
5292 SUMyy = 0;
5293 for (step = 0; step < steps; step++) {
5294 if (finite(data[step * src->ds_cnt])) {
5295 cnt++;
5296 SUMx += step;
5297 SUMxx += step * step;
5298 SUMxy += step * data[step * src->ds_cnt];
5299 SUMy += data[step * src->ds_cnt];
5300 SUMyy += data[step * src->ds_cnt] * data[step * src->ds_cnt];
5301 };
5302 }
5304 slope = (SUMx * SUMy - cnt * SUMxy) / (SUMx * SUMx - cnt * SUMxx);
5305 y_intercept = (SUMy - slope * SUMx) / cnt;
5306 correl =
5307 (SUMxy -
5308 (SUMx * SUMy) / cnt) /
5309 sqrt((SUMxx -
5310 (SUMx * SUMx) / cnt) * (SUMyy - (SUMy * SUMy) / cnt));
5311 if (cnt) {
5312 if (dst->vf.op == VDEF_LSLSLOPE) {
5313 dst->vf.val = slope;
5314 dst->vf.when = 0;
5315 dst->vf.never = 1;
5316 } else if (dst->vf.op == VDEF_LSLINT) {
5317 dst->vf.val = y_intercept;
5318 dst->vf.when = 0;
5319 dst->vf.never = 1;
5320 } else if (dst->vf.op == VDEF_LSLCORREL) {
5321 dst->vf.val = correl;
5322 dst->vf.when = 0;
5323 dst->vf.never = 1;
5324 };
5325 } else {
5326 dst->vf.val = DNAN;
5327 dst->vf.when = 0;
5328 dst->vf.never = 1;
5329 }
5330 }
5331 break;
5332 }
5333 return 0;
5334 }
5336 /* NaN < -INF < finite_values < INF */
5337 int vdef_percent_compar(
5338 const void
5339 *a,
5340 const void
5341 *b)
5342 {
5343 /* Equality is not returned; this doesn't hurt except
5344 * (maybe) for a little performance.
5345 */
5347 /* First catch NaN values. They are smallest */
5348 if (isnan(*(double *) a))
5349 return -1;
5350 if (isnan(*(double *) b))
5351 return 1;
5352 /* NaN doesn't reach this part so INF and -INF are extremes.
5353 * The sign from isinf() is compatible with the sign we return
5354 */
5355 if (isinf(*(double *) a))
5356 return isinf(*(double *) a);
5357 if (isinf(*(double *) b))
5358 return isinf(*(double *) b);
5359 /* If we reach this, both values must be finite */
5360 if (*(double *) a < *(double *) b)
5361 return -1;
5362 else
5363 return 1;
5364 }
5366 void grinfo_push(
5367 image_desc_t *im,
5368 char *key,
5369 rrd_info_type_t type,
5370 rrd_infoval_t value)
5371 {
5372 im->grinfo_current = rrd_info_push(im->grinfo_current, key, type, value);
5373 if (im->grinfo == NULL) {
5374 im->grinfo = im->grinfo_current;
5375 }
5376 }
5379 void time_clean(
5380 char *result,
5381 char *format)
5382 {
5383 int j, jj;
5385 /* Handling based on
5386 - ANSI C99 Specifications http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1124.pdf
5387 - Single UNIX Specification version 2 http://www.opengroup.org/onlinepubs/007908799/xsh/strftime.html
5388 - POSIX:2001/Single UNIX Specification version 3 http://www.opengroup.org/onlinepubs/009695399/functions/strftime.html
5389 - POSIX:2008 Specifications http://www.opengroup.org/onlinepubs/9699919799/functions/strftime.html
5390 Specifications tells
5391 "If a conversion specifier is not one of the above, the behavior is undefined."
5393 C99 tells
5394 "A conversion specifier consists of a % character, possibly followed by an E or O modifier character (described below), followed by a character that determines the behavior of the conversion specifier.
5396 POSIX:2001 tells
5397 "A conversion specification consists of a '%' character, possibly followed by an E or O modifier, and a terminating conversion specifier character that determines the conversion specification's behavior."
5399 POSIX:2008 introduce more complexe behavior that are not handled here.
5401 According to this, this code will replace:
5402 - % followed by @ by a %@
5403 - % followed by by a %SPACE
5404 - % followed by . by a %.
5405 - % followed by % by a %
5406 - % followed by t by a TAB
5407 - % followed by E then anything by '-'
5408 - % followed by O then anything by '-'
5409 - % followed by anything else by at least one '-'. More characters may be added to better fit expected output length
5410 */
5412 jj = 0;
5413 for(j = 0; (j < FMT_LEG_LEN - 1) && (jj < FMT_LEG_LEN); j++) { /* we don't need to parse the last char */
5414 if (format[j] == '%') {
5415 if ((format[j+1] == 'E') || (format[j+1] == 'O')) {
5416 result[jj++] = '-';
5417 j+=2; /* We skip next 2 following char */
5418 } else if ((format[j+1] == 'C') || (format[j+1] == 'd') ||
5419 (format[j+1] == 'g') || (format[j+1] == 'H') ||
5420 (format[j+1] == 'I') || (format[j+1] == 'm') ||
5421 (format[j+1] == 'M') || (format[j+1] == 'S') ||
5422 (format[j+1] == 'U') || (format[j+1] == 'V') ||
5423 (format[j+1] == 'W') || (format[j+1] == 'y')) {
5424 result[jj++] = '-';
5425 if (jj < FMT_LEG_LEN) {
5426 result[jj++] = '-';
5427 }
5428 j++; /* We skip the following char */
5429 } else if (format[j+1] == 'j') {
5430 result[jj++] = '-';
5431 if (jj < FMT_LEG_LEN - 1) {
5432 result[jj++] = '-';
5433 result[jj++] = '-';
5434 }
5435 j++; /* We skip the following char */
5436 } else if ((format[j+1] == 'G') || (format[j+1] == 'Y')) {
5437 /* Assuming Year on 4 digit */
5438 result[jj++] = '-';
5439 if (jj < FMT_LEG_LEN - 2) {
5440 result[jj++] = '-';
5441 result[jj++] = '-';
5442 result[jj++] = '-';
5443 }
5444 j++; /* We skip the following char */
5445 } else if (format[j+1] == 'R') {
5446 result[jj++] = '-';
5447 if (jj < FMT_LEG_LEN - 3) {
5448 result[jj++] = '-';
5449 result[jj++] = ':';
5450 result[jj++] = '-';
5451 result[jj++] = '-';
5452 }
5453 j++; /* We skip the following char */
5454 } else if (format[j+1] == 'T') {
5455 result[jj++] = '-';
5456 if (jj < FMT_LEG_LEN - 6) {
5457 result[jj++] = '-';
5458 result[jj++] = ':';
5459 result[jj++] = '-';
5460 result[jj++] = '-';
5461 result[jj++] = ':';
5462 result[jj++] = '-';
5463 result[jj++] = '-';
5464 }
5465 j++; /* We skip the following char */
5466 } else if (format[j+1] == 'F') {
5467 result[jj++] = '-';
5468 if (jj < FMT_LEG_LEN - 8) {
5469 result[jj++] = '-';
5470 result[jj++] = '-';
5471 result[jj++] = '-';
5472 result[jj++] = '-';
5473 result[jj++] = '-';
5474 result[jj++] = '-';
5475 result[jj++] = '-';
5476 result[jj++] = '-';
5477 result[jj++] = '-';
5478 }
5479 j++; /* We skip the following char */
5480 } else if (format[j+1] == 'D') {
5481 result[jj++] = '-';
5482 if (jj < FMT_LEG_LEN - 6) {
5483 result[jj++] = '-';
5484 result[jj++] = '/';
5485 result[jj++] = '-';
5486 result[jj++] = '-';
5487 result[jj++] = '/';
5488 result[jj++] = '-';
5489 result[jj++] = '-';
5490 }
5491 j++; /* We skip the following char */
5492 } else if (format[j+1] == 'n') {
5493 result[jj++] = '\r';
5494 result[jj++] = '\n';
5495 j++; /* We skip the following char */
5496 } else if (format[j+1] == 't') {
5497 result[jj++] = '\t';
5498 j++; /* We skip the following char */
5499 } else if (format[j+1] == '%') {
5500 result[jj++] = '%';
5501 j++; /* We skip the following char */
5502 } else if (format[j+1] == ' ') {
5503 if (jj < FMT_LEG_LEN - 1) {
5504 result[jj++] = '%';
5505 result[jj++] = ' ';
5506 }
5507 j++; /* We skip the following char */
5508 } else if (format[j+1] == '.') {
5509 if (jj < FMT_LEG_LEN - 1) {
5510 result[jj++] = '%';
5511 result[jj++] = '.';
5512 }
5513 j++; /* We skip the following char */
5514 } else if (format[j+1] == '@') {
5515 if (jj < FMT_LEG_LEN - 1) {
5516 result[jj++] = '%';
5517 result[jj++] = '@';
5518 }
5519 j++; /* We skip the following char */
5520 } else {
5521 result[jj++] = '-';
5522 j++; /* We skip the following char */
5523 }
5524 } else {
5525 result[jj++] = format[j];
5526 }
5527 }
5528 result[jj] = '\0'; /* We must force the end of the string */
5529 }