1 /****************************************************************************
2 * RRDtool 1.2.15 Copyright by Tobi Oetiker, 1997-2006
3 ****************************************************************************
4 * rrd__graph.c produce graphs from data in rrdfiles
5 ****************************************************************************/
8 #include <sys/stat.h>
10 #include "rrd_tool.h"
12 #if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
13 #include "strftime.h"
14 #include <io.h>
15 #include <fcntl.h>
16 #endif
18 #ifdef HAVE_TIME_H
19 #include <time.h>
20 #endif
22 #ifdef HAVE_LOCALE_H
23 #include <locale.h>
24 #endif
26 #include "rrd_graph.h"
28 /* some constant definitions */
32 #ifndef RRD_DEFAULT_FONT
33 /* there is special code later to pick Cour.ttf when running on windows */
34 #define RRD_DEFAULT_FONT "DejaVuSansMono-Roman.ttf"
35 #endif
37 text_prop_t text_prop[] = {
38 { 8.0, RRD_DEFAULT_FONT }, /* default */
39 { 9.0, RRD_DEFAULT_FONT }, /* title */
40 { 7.0, RRD_DEFAULT_FONT }, /* axis */
41 { 8.0, RRD_DEFAULT_FONT }, /* unit */
42 { 8.0, RRD_DEFAULT_FONT } /* legend */
43 };
45 xlab_t xlab[] = {
46 {0, 0, TMT_SECOND,30, TMT_MINUTE,5, TMT_MINUTE,5, 0,"%H:%M"},
47 {2, 0, TMT_MINUTE,1, TMT_MINUTE,5, TMT_MINUTE,5, 0,"%H:%M"},
48 {5, 0, TMT_MINUTE,2, TMT_MINUTE,10, TMT_MINUTE,10, 0,"%H:%M"},
49 {10, 0, TMT_MINUTE,5, TMT_MINUTE,20, TMT_MINUTE,20, 0,"%H:%M"},
50 {30, 0, TMT_MINUTE,10, TMT_HOUR,1, TMT_HOUR,1, 0,"%H:%M"},
51 {60, 0, TMT_MINUTE,30, TMT_HOUR,2, TMT_HOUR,2, 0,"%H:%M"},
52 {60, 24*3600, TMT_MINUTE,30, TMT_HOUR,2, TMT_HOUR,4, 0,"%a %H:%M"},
53 {180, 0, TMT_HOUR,1, TMT_HOUR,6, TMT_HOUR,6, 0,"%H:%M"},
54 {180, 24*3600, TMT_HOUR,1, TMT_HOUR,6, TMT_HOUR,12, 0,"%a %H:%M"},
55 /*{300, 0, TMT_HOUR,3, TMT_HOUR,12, TMT_HOUR,12, 12*3600,"%a %p"}, this looks silly*/
56 {600, 0, TMT_HOUR,6, TMT_DAY,1, TMT_DAY,1, 24*3600,"%a"},
57 {1200, 0, TMT_HOUR,6, TMT_DAY,1, TMT_DAY,1, 24*3600,"%d"},
58 {1800, 0, TMT_HOUR,12, TMT_DAY,1, TMT_DAY,2, 24*3600,"%a %d"},
59 {2400, 0, TMT_HOUR,12, TMT_DAY,1, TMT_DAY,2, 24*3600,"%a"},
60 {3600, 0, TMT_DAY,1, TMT_WEEK,1, TMT_WEEK,1, 7*24*3600,"Week %V"},
61 {3*3600, 0, TMT_WEEK,1, TMT_MONTH,1, TMT_WEEK,2, 7*24*3600,"Week %V"},
62 {6*3600, 0, TMT_MONTH,1, TMT_MONTH,1, TMT_MONTH,1, 30*24*3600,"%b"},
63 {48*3600, 0, TMT_MONTH,1, TMT_MONTH,3, TMT_MONTH,3, 30*24*3600,"%b"},
64 {315360, 0, TMT_MONTH,3, TMT_YEAR,1, TMT_YEAR,1, 365*24*3600,"%Y"},
65 {10*24*3600, 0, TMT_YEAR,1, TMT_YEAR,1, TMT_YEAR,1, 365*24*3600,"%y"},
66 {-1,0,TMT_MONTH,0,TMT_MONTH,0,TMT_MONTH,0,0,""}
67 };
69 /* sensible y label intervals ...*/
71 ylab_t ylab[]= {
72 {0.1, {1,2, 5,10}},
73 {0.2, {1,5,10,20}},
74 {0.5, {1,2, 4,10}},
75 {1.0, {1,2, 5,10}},
76 {2.0, {1,5,10,20}},
77 {5.0, {1,2, 4,10}},
78 {10.0, {1,2, 5,10}},
79 {20.0, {1,5,10,20}},
80 {50.0, {1,2, 4,10}},
81 {100.0, {1,2, 5,10}},
82 {200.0, {1,5,10,20}},
83 {500.0, {1,2, 4,10}},
84 {0.0, {0,0,0,0}}};
87 gfx_color_t graph_col[] = /* default colors */
88 { 0xFFFFFFFF, /* canvas */
89 0xF0F0F0FF, /* background */
90 0xD0D0D0FF, /* shade A */
91 0xA0A0A0FF, /* shade B */
92 0x90909080, /* grid */
93 0xE0505080, /* major grid */
94 0x000000FF, /* font */
95 0x802020FF, /* arrow */
96 0x202020FF, /* axis */
97 0x000000FF /* frame */
98 };
101 /* #define DEBUG */
103 #ifdef DEBUG
104 # define DPRINT(x) (void)(printf x, printf("\n"))
105 #else
106 # define DPRINT(x)
107 #endif
110 /* initialize with xtr(im,0); */
111 int
112 xtr(image_desc_t *im,time_t mytime){
113 static double pixie;
114 if (mytime==0){
115 pixie = (double) im->xsize / (double)(im->end - im->start);
116 return im->xorigin;
117 }
118 return (int)((double)im->xorigin
119 + pixie * ( mytime - im->start ) );
120 }
122 /* translate data values into y coordinates */
123 double
124 ytr(image_desc_t *im, double value){
125 static double pixie;
126 double yval;
127 if (isnan(value)){
128 if(!im->logarithmic)
129 pixie = (double) im->ysize / (im->maxval - im->minval);
130 else
131 pixie = (double) im->ysize / (log10(im->maxval) - log10(im->minval));
132 yval = im->yorigin;
133 } else if(!im->logarithmic) {
134 yval = im->yorigin - pixie * (value - im->minval);
135 } else {
136 if (value < im->minval) {
137 yval = im->yorigin;
138 } else {
139 yval = im->yorigin - pixie * (log10(value) - log10(im->minval));
140 }
141 }
142 /* make sure we don't return anything too unreasonable. GD lib can
143 get terribly slow when drawing lines outside its scope. This is
144 especially problematic in connection with the rigid option */
145 if (! im->rigid) {
146 /* keep yval as-is */
147 } else if (yval > im->yorigin) {
148 yval = im->yorigin +0.00001;
149 } else if (yval < im->yorigin - im->ysize){
150 yval = im->yorigin - im->ysize - 0.00001;
151 }
152 return yval;
153 }
157 /* conversion function for symbolic entry names */
160 #define conv_if(VV,VVV) \
161 if (strcmp(#VV, string) == 0) return VVV ;
163 enum gf_en gf_conv(char *string){
165 conv_if(PRINT,GF_PRINT)
166 conv_if(GPRINT,GF_GPRINT)
167 conv_if(COMMENT,GF_COMMENT)
168 conv_if(HRULE,GF_HRULE)
169 conv_if(VRULE,GF_VRULE)
170 conv_if(LINE,GF_LINE)
171 conv_if(AREA,GF_AREA)
172 conv_if(STACK,GF_STACK)
173 conv_if(TICK,GF_TICK)
174 conv_if(DEF,GF_DEF)
175 conv_if(CDEF,GF_CDEF)
176 conv_if(VDEF,GF_VDEF)
177 #ifdef WITH_PIECHART
178 conv_if(PART,GF_PART)
179 #endif
180 conv_if(XPORT,GF_XPORT)
181 conv_if(SHIFT,GF_SHIFT)
183 return (-1);
184 }
186 enum gfx_if_en if_conv(char *string){
188 conv_if(PNG,IF_PNG)
189 conv_if(SVG,IF_SVG)
190 conv_if(EPS,IF_EPS)
191 conv_if(PDF,IF_PDF)
193 return (-1);
194 }
196 enum tmt_en tmt_conv(char *string){
198 conv_if(SECOND,TMT_SECOND)
199 conv_if(MINUTE,TMT_MINUTE)
200 conv_if(HOUR,TMT_HOUR)
201 conv_if(DAY,TMT_DAY)
202 conv_if(WEEK,TMT_WEEK)
203 conv_if(MONTH,TMT_MONTH)
204 conv_if(YEAR,TMT_YEAR)
205 return (-1);
206 }
208 enum grc_en grc_conv(char *string){
210 conv_if(BACK,GRC_BACK)
211 conv_if(CANVAS,GRC_CANVAS)
212 conv_if(SHADEA,GRC_SHADEA)
213 conv_if(SHADEB,GRC_SHADEB)
214 conv_if(GRID,GRC_GRID)
215 conv_if(MGRID,GRC_MGRID)
216 conv_if(FONT,GRC_FONT)
217 conv_if(ARROW,GRC_ARROW)
218 conv_if(AXIS,GRC_AXIS)
219 conv_if(FRAME,GRC_FRAME)
221 return -1;
222 }
224 enum text_prop_en text_prop_conv(char *string){
226 conv_if(DEFAULT,TEXT_PROP_DEFAULT)
227 conv_if(TITLE,TEXT_PROP_TITLE)
228 conv_if(AXIS,TEXT_PROP_AXIS)
229 conv_if(UNIT,TEXT_PROP_UNIT)
230 conv_if(LEGEND,TEXT_PROP_LEGEND)
231 return -1;
232 }
235 #undef conv_if
237 int
238 im_free(image_desc_t *im)
239 {
240 unsigned long i,ii;
242 if (im == NULL) return 0;
243 for(i=0;i<(unsigned)im->gdes_c;i++){
244 if (im->gdes[i].data_first){
245 /* careful here, because a single pointer can occur several times */
246 free (im->gdes[i].data);
247 if (im->gdes[i].ds_namv){
248 for (ii=0;ii<im->gdes[i].ds_cnt;ii++)
249 free(im->gdes[i].ds_namv[ii]);
250 free(im->gdes[i].ds_namv);
251 }
252 }
253 free (im->gdes[i].p_data);
254 free (im->gdes[i].rpnp);
255 }
256 free(im->gdes);
257 gfx_destroy(im->canvas);
258 return 0;
259 }
261 /* find SI magnitude symbol for the given number*/
262 void
263 auto_scale(
264 image_desc_t *im, /* image description */
265 double *value,
266 char **symb_ptr,
267 double *magfact
268 )
269 {
271 char *symbol[] = {"a", /* 10e-18 Atto */
272 "f", /* 10e-15 Femto */
273 "p", /* 10e-12 Pico */
274 "n", /* 10e-9 Nano */
275 "u", /* 10e-6 Micro */
276 "m", /* 10e-3 Milli */
277 " ", /* Base */
278 "k", /* 10e3 Kilo */
279 "M", /* 10e6 Mega */
280 "G", /* 10e9 Giga */
281 "T", /* 10e12 Tera */
282 "P", /* 10e15 Peta */
283 "E"};/* 10e18 Exa */
285 int symbcenter = 6;
286 int sindex;
288 if (*value == 0.0 || isnan(*value) ) {
289 sindex = 0;
290 *magfact = 1.0;
291 } else {
292 sindex = floor(log(fabs(*value))/log((double)im->base));
293 *magfact = pow((double)im->base, (double)sindex);
294 (*value) /= (*magfact);
295 }
296 if ( sindex <= symbcenter && sindex >= -symbcenter) {
297 (*symb_ptr) = symbol[sindex+symbcenter];
298 }
299 else {
300 (*symb_ptr) = "?";
301 }
302 }
305 static char si_symbol[] = {
306 'a', /* 10e-18 Atto */
307 'f', /* 10e-15 Femto */
308 'p', /* 10e-12 Pico */
309 'n', /* 10e-9 Nano */
310 'u', /* 10e-6 Micro */
311 'm', /* 10e-3 Milli */
312 ' ', /* Base */
313 'k', /* 10e3 Kilo */
314 'M', /* 10e6 Mega */
315 'G', /* 10e9 Giga */
316 'T', /* 10e12 Tera */
317 'P', /* 10e15 Peta */
318 'E', /* 10e18 Exa */
319 };
320 static const int si_symbcenter = 6;
322 /* find SI magnitude symbol for the numbers on the y-axis*/
323 void
324 si_unit(
325 image_desc_t *im /* image description */
326 )
327 {
329 double digits,viewdigits=0;
331 digits = floor( log( max( fabs(im->minval),fabs(im->maxval)))/log((double)im->base));
333 if (im->unitsexponent != 9999) {
334 /* unitsexponent = 9, 6, 3, 0, -3, -6, -9, etc */
335 viewdigits = floor(im->unitsexponent / 3);
336 } else {
337 viewdigits = digits;
338 }
340 im->magfact = pow((double)im->base , digits);
342 #ifdef DEBUG
343 printf("digits %6.3f im->magfact %6.3f\n",digits,im->magfact);
344 #endif
346 im->viewfactor = im->magfact / pow((double)im->base , viewdigits);
348 if ( ((viewdigits+si_symbcenter) < sizeof(si_symbol)) &&
349 ((viewdigits+si_symbcenter) >= 0) )
350 im->symbol = si_symbol[(int)viewdigits+si_symbcenter];
351 else
352 im->symbol = '?';
353 }
355 /* move min and max values around to become sensible */
357 void
358 expand_range(image_desc_t *im)
359 {
360 double sensiblevalues[] ={1000.0,900.0,800.0,750.0,700.0,
361 600.0,500.0,400.0,300.0,250.0,
362 200.0,125.0,100.0,90.0,80.0,
363 75.0,70.0,60.0,50.0,40.0,30.0,
364 25.0,20.0,10.0,9.0,8.0,
365 7.0,6.0,5.0,4.0,3.5,3.0,
366 2.5,2.0,1.8,1.5,1.2,1.0,
367 0.8,0.7,0.6,0.5,0.4,0.3,0.2,0.1,0.0,-1};
369 double scaled_min,scaled_max;
370 double adj;
371 int i;
375 #ifdef DEBUG
376 printf("Min: %6.2f Max: %6.2f MagFactor: %6.2f\n",
377 im->minval,im->maxval,im->magfact);
378 #endif
380 if (isnan(im->ygridstep)){
381 if(im->extra_flags & ALTAUTOSCALE) {
382 /* measure the amplitude of the function. Make sure that
383 graph boundaries are slightly higher then max/min vals
384 so we can see amplitude on the graph */
385 double delt, fact;
387 delt = im->maxval - im->minval;
388 adj = delt * 0.1;
389 fact = 2.0 * pow(10.0,
390 floor(log10(max(fabs(im->minval), fabs(im->maxval))/im->magfact)) - 2);
391 if (delt < fact) {
392 adj = (fact - delt) * 0.55;
393 #ifdef DEBUG
394 printf("Min: %6.2f Max: %6.2f delt: %6.2f fact: %6.2f adj: %6.2f\n", im->minval, im->maxval, delt, fact, adj);
395 #endif
396 }
397 im->minval -= adj;
398 im->maxval += adj;
399 }
400 else if(im->extra_flags & ALTAUTOSCALE_MAX) {
401 /* measure the amplitude of the function. Make sure that
402 graph boundaries are slightly higher than max vals
403 so we can see amplitude on the graph */
404 adj = (im->maxval - im->minval) * 0.1;
405 im->maxval += adj;
406 }
407 else {
408 scaled_min = im->minval / im->magfact;
409 scaled_max = im->maxval / im->magfact;
411 for (i=1; sensiblevalues[i] > 0; i++){
412 if (sensiblevalues[i-1]>=scaled_min &&
413 sensiblevalues[i]<=scaled_min)
414 im->minval = sensiblevalues[i]*(im->magfact);
416 if (-sensiblevalues[i-1]<=scaled_min &&
417 -sensiblevalues[i]>=scaled_min)
418 im->minval = -sensiblevalues[i-1]*(im->magfact);
420 if (sensiblevalues[i-1] >= scaled_max &&
421 sensiblevalues[i] <= scaled_max)
422 im->maxval = sensiblevalues[i-1]*(im->magfact);
424 if (-sensiblevalues[i-1]<=scaled_max &&
425 -sensiblevalues[i] >=scaled_max)
426 im->maxval = -sensiblevalues[i]*(im->magfact);
427 }
428 }
429 } else {
430 /* adjust min and max to the grid definition if there is one */
431 im->minval = (double)im->ylabfact * im->ygridstep *
432 floor(im->minval / ((double)im->ylabfact * im->ygridstep));
433 im->maxval = (double)im->ylabfact * im->ygridstep *
434 ceil(im->maxval /( (double)im->ylabfact * im->ygridstep));
435 }
437 #ifdef DEBUG
438 fprintf(stderr,"SCALED Min: %6.2f Max: %6.2f Factor: %6.2f\n",
439 im->minval,im->maxval,im->magfact);
440 #endif
441 }
443 void
444 apply_gridfit(image_desc_t *im)
445 {
446 if (isnan(im->minval) || isnan(im->maxval))
447 return;
448 ytr(im,DNAN);
449 if (im->logarithmic) {
450 double ya, yb, ypix, ypixfrac;
451 double log10_range = log10(im->maxval) - log10(im->minval);
452 ya = pow((double)10, floor(log10(im->minval)));
453 while (ya < im->minval)
454 ya *= 10;
455 if (ya > im->maxval)
456 return; /* don't have y=10^x gridline */
457 yb = ya * 10;
458 if (yb <= im->maxval) {
459 /* we have at least 2 y=10^x gridlines.
460 Make sure distance between them in pixels
461 are an integer by expanding im->maxval */
462 double y_pixel_delta = ytr(im, ya) - ytr(im, yb);
463 double factor = y_pixel_delta / floor(y_pixel_delta);
464 double new_log10_range = factor * log10_range;
465 double new_ymax_log10 = log10(im->minval) + new_log10_range;
466 im->maxval = pow(10, new_ymax_log10);
467 ytr(im,DNAN); /* reset precalc */
468 log10_range = log10(im->maxval) - log10(im->minval);
469 }
470 /* make sure first y=10^x gridline is located on
471 integer pixel position by moving scale slightly
472 downwards (sub-pixel movement) */
473 ypix = ytr(im, ya) + im->ysize; /* add im->ysize so it always is positive */
474 ypixfrac = ypix - floor(ypix);
475 if (ypixfrac > 0 && ypixfrac < 1) {
476 double yfrac = ypixfrac / im->ysize;
477 im->minval = pow(10, log10(im->minval) - yfrac * log10_range);
478 im->maxval = pow(10, log10(im->maxval) - yfrac * log10_range);
479 ytr(im,DNAN); /* reset precalc */
480 }
481 } else {
482 /* Make sure we have an integer pixel distance between
483 each minor gridline */
484 double ypos1 = ytr(im, im->minval);
485 double ypos2 = ytr(im, im->minval + im->ygrid_scale.gridstep);
486 double y_pixel_delta = ypos1 - ypos2;
487 double factor = y_pixel_delta / floor(y_pixel_delta);
488 double new_range = factor * (im->maxval - im->minval);
489 double gridstep = im->ygrid_scale.gridstep;
490 double minor_y, minor_y_px, minor_y_px_frac;
491 im->maxval = im->minval + new_range;
492 ytr(im,DNAN); /* reset precalc */
493 /* make sure first minor gridline is on integer pixel y coord */
494 minor_y = gridstep * floor(im->minval / gridstep);
495 while (minor_y < im->minval)
496 minor_y += gridstep;
497 minor_y_px = ytr(im, minor_y) + im->ysize; /* ensure > 0 by adding ysize */
498 minor_y_px_frac = minor_y_px - floor(minor_y_px);
499 if (minor_y_px_frac > 0 && minor_y_px_frac < 1) {
500 double yfrac = minor_y_px_frac / im->ysize;
501 double range = im->maxval - im->minval;
502 im->minval = im->minval - yfrac * range;
503 im->maxval = im->maxval - yfrac * range;
504 ytr(im,DNAN); /* reset precalc */
505 }
506 calc_horizontal_grid(im); /* recalc with changed im->maxval */
507 }
508 }
510 /* reduce data reimplementation by Alex */
512 void
513 reduce_data(
514 enum cf_en cf, /* which consolidation function ?*/
515 unsigned long cur_step, /* step the data currently is in */
516 time_t *start, /* start, end and step as requested ... */
517 time_t *end, /* ... by the application will be ... */
518 unsigned long *step, /* ... adjusted to represent reality */
519 unsigned long *ds_cnt, /* number of data sources in file */
520 rrd_value_t **data) /* two dimensional array containing the data */
521 {
522 int i,reduce_factor = ceil((double)(*step) / (double)cur_step);
523 unsigned long col,dst_row,row_cnt,start_offset,end_offset,skiprows=0;
524 rrd_value_t *srcptr,*dstptr;
526 (*step) = cur_step*reduce_factor; /* set new step size for reduced data */
527 dstptr = *data;
528 srcptr = *data;
529 row_cnt = ((*end)-(*start))/cur_step;
531 #ifdef DEBUG
532 #define DEBUG_REDUCE
533 #endif
534 #ifdef DEBUG_REDUCE
535 printf("Reducing %lu rows with factor %i time %lu to %lu, step %lu\n",
536 row_cnt,reduce_factor,*start,*end,cur_step);
537 for (col=0;col<row_cnt;col++) {
538 printf("time %10lu: ",*start+(col+1)*cur_step);
539 for (i=0;i<*ds_cnt;i++)
540 printf(" %8.2e",srcptr[*ds_cnt*col+i]);
541 printf("\n");
542 }
543 #endif
545 /* We have to combine [reduce_factor] rows of the source
546 ** into one row for the destination. Doing this we also
547 ** need to take care to combine the correct rows. First
548 ** alter the start and end time so that they are multiples
549 ** of the new step time. We cannot reduce the amount of
550 ** time so we have to move the end towards the future and
551 ** the start towards the past.
552 */
553 end_offset = (*end) % (*step);
554 start_offset = (*start) % (*step);
556 /* If there is a start offset (which cannot be more than
557 ** one destination row), skip the appropriate number of
558 ** source rows and one destination row. The appropriate
559 ** number is what we do know (start_offset/cur_step) of
560 ** the new interval (*step/cur_step aka reduce_factor).
561 */
562 #ifdef DEBUG_REDUCE
563 printf("start_offset: %lu end_offset: %lu\n",start_offset,end_offset);
564 printf("row_cnt before: %lu\n",row_cnt);
565 #endif
566 if (start_offset) {
567 (*start) = (*start)-start_offset;
568 skiprows=reduce_factor-start_offset/cur_step;
569 srcptr+=skiprows* *ds_cnt;
570 for (col=0;col<(*ds_cnt);col++) *dstptr++ = DNAN;
571 row_cnt-=skiprows;
572 }
573 #ifdef DEBUG_REDUCE
574 printf("row_cnt between: %lu\n",row_cnt);
575 #endif
577 /* At the end we have some rows that are not going to be
578 ** used, the amount is end_offset/cur_step
579 */
580 if (end_offset) {
581 (*end) = (*end)-end_offset+(*step);
582 skiprows = end_offset/cur_step;
583 row_cnt-=skiprows;
584 }
585 #ifdef DEBUG_REDUCE
586 printf("row_cnt after: %lu\n",row_cnt);
587 #endif
589 /* Sanity check: row_cnt should be multiple of reduce_factor */
590 /* if this gets triggered, something is REALLY WRONG ... we die immediately */
592 if (row_cnt%reduce_factor) {
593 printf("SANITY CHECK: %lu rows cannot be reduced by %i \n",
594 row_cnt,reduce_factor);
595 printf("BUG in reduce_data()\n");
596 exit(1);
597 }
599 /* Now combine reduce_factor intervals at a time
600 ** into one interval for the destination.
601 */
603 for (dst_row=0;(long int)row_cnt>=reduce_factor;dst_row++) {
604 for (col=0;col<(*ds_cnt);col++) {
605 rrd_value_t newval=DNAN;
606 unsigned long validval=0;
608 for (i=0;i<reduce_factor;i++) {
609 if (isnan(srcptr[i*(*ds_cnt)+col])) {
610 continue;
611 }
612 validval++;
613 if (isnan(newval)) newval = srcptr[i*(*ds_cnt)+col];
614 else {
615 switch (cf) {
616 case CF_HWPREDICT:
617 case CF_DEVSEASONAL:
618 case CF_DEVPREDICT:
619 case CF_SEASONAL:
620 case CF_AVERAGE:
621 newval += srcptr[i*(*ds_cnt)+col];
622 break;
623 case CF_MINIMUM:
624 newval = min (newval,srcptr[i*(*ds_cnt)+col]);
625 break;
626 case CF_FAILURES:
627 /* an interval contains a failure if any subintervals contained a failure */
628 case CF_MAXIMUM:
629 newval = max (newval,srcptr[i*(*ds_cnt)+col]);
630 break;
631 case CF_LAST:
632 newval = srcptr[i*(*ds_cnt)+col];
633 break;
634 }
635 }
636 }
637 if (validval == 0){newval = DNAN;} else{
638 switch (cf) {
639 case CF_HWPREDICT:
640 case CF_DEVSEASONAL:
641 case CF_DEVPREDICT:
642 case CF_SEASONAL:
643 case CF_AVERAGE:
644 newval /= validval;
645 break;
646 case CF_MINIMUM:
647 case CF_FAILURES:
648 case CF_MAXIMUM:
649 case CF_LAST:
650 break;
651 }
652 }
653 *dstptr++=newval;
654 }
655 srcptr+=(*ds_cnt)*reduce_factor;
656 row_cnt-=reduce_factor;
657 }
658 /* If we had to alter the endtime, we didn't have enough
659 ** source rows to fill the last row. Fill it with NaN.
660 */
661 if (end_offset) for (col=0;col<(*ds_cnt);col++) *dstptr++ = DNAN;
662 #ifdef DEBUG_REDUCE
663 row_cnt = ((*end)-(*start))/ *step;
664 srcptr = *data;
665 printf("Done reducing. Currently %lu rows, time %lu to %lu, step %lu\n",
666 row_cnt,*start,*end,*step);
667 for (col=0;col<row_cnt;col++) {
668 printf("time %10lu: ",*start+(col+1)*(*step));
669 for (i=0;i<*ds_cnt;i++)
670 printf(" %8.2e",srcptr[*ds_cnt*col+i]);
671 printf("\n");
672 }
673 #endif
674 }
677 /* get the data required for the graphs from the
678 relevant rrds ... */
680 int
681 data_fetch(image_desc_t *im )
682 {
683 int i,ii;
684 int skip;
686 /* pull the data from the rrd files ... */
687 for (i=0;i< (int)im->gdes_c;i++){
688 /* only GF_DEF elements fetch data */
689 if (im->gdes[i].gf != GF_DEF)
690 continue;
692 skip=0;
693 /* do we have it already ?*/
694 for (ii=0;ii<i;ii++) {
695 if (im->gdes[ii].gf != GF_DEF)
696 continue;
697 if ((strcmp(im->gdes[i].rrd, im->gdes[ii].rrd) == 0)
698 && (im->gdes[i].cf == im->gdes[ii].cf)
699 && (im->gdes[i].cf_reduce == im->gdes[ii].cf_reduce)
700 && (im->gdes[i].start_orig == im->gdes[ii].start_orig)
701 && (im->gdes[i].end_orig == im->gdes[ii].end_orig)
702 && (im->gdes[i].step_orig == im->gdes[ii].step_orig)) {
703 /* OK, the data is already there.
704 ** Just copy the header portion
705 */
706 im->gdes[i].start = im->gdes[ii].start;
707 im->gdes[i].end = im->gdes[ii].end;
708 im->gdes[i].step = im->gdes[ii].step;
709 im->gdes[i].ds_cnt = im->gdes[ii].ds_cnt;
710 im->gdes[i].ds_namv = im->gdes[ii].ds_namv;
711 im->gdes[i].data = im->gdes[ii].data;
712 im->gdes[i].data_first = 0;
713 skip=1;
714 }
715 if (skip)
716 break;
717 }
718 if (! skip) {
719 unsigned long ft_step = im->gdes[i].step ; /* ft_step will record what we got from fetch */
721 if((rrd_fetch_fn(im->gdes[i].rrd,
722 im->gdes[i].cf,
723 &im->gdes[i].start,
724 &im->gdes[i].end,
725 &ft_step,
726 &im->gdes[i].ds_cnt,
727 &im->gdes[i].ds_namv,
728 &im->gdes[i].data)) == -1){
729 return -1;
730 }
731 im->gdes[i].data_first = 1;
733 if (ft_step < im->gdes[i].step) {
734 reduce_data(im->gdes[i].cf_reduce,
735 ft_step,
736 &im->gdes[i].start,
737 &im->gdes[i].end,
738 &im->gdes[i].step,
739 &im->gdes[i].ds_cnt,
740 &im->gdes[i].data);
741 } else {
742 im->gdes[i].step = ft_step;
743 }
744 }
746 /* lets see if the required data source is really there */
747 for(ii=0;ii<(int)im->gdes[i].ds_cnt;ii++){
748 if(strcmp(im->gdes[i].ds_namv[ii],im->gdes[i].ds_nam) == 0){
749 im->gdes[i].ds=ii; }
750 }
751 if (im->gdes[i].ds== -1){
752 rrd_set_error("No DS called '%s' in '%s'",
753 im->gdes[i].ds_nam,im->gdes[i].rrd);
754 return -1;
755 }
757 }
758 return 0;
759 }
761 /* evaluate the expressions in the CDEF functions */
763 /*************************************************************
764 * CDEF stuff
765 *************************************************************/
767 long
768 find_var_wrapper(void *arg1, char *key)
769 {
770 return find_var((image_desc_t *) arg1, key);
771 }
773 /* find gdes containing var*/
774 long
775 find_var(image_desc_t *im, char *key){
776 long ii;
777 for(ii=0;ii<im->gdes_c-1;ii++){
778 if((im->gdes[ii].gf == GF_DEF
779 || im->gdes[ii].gf == GF_VDEF
780 || im->gdes[ii].gf == GF_CDEF)
781 && (strcmp(im->gdes[ii].vname,key) == 0)){
782 return ii;
783 }
784 }
785 return -1;
786 }
788 /* find the largest common denominator for all the numbers
789 in the 0 terminated num array */
790 long
791 lcd(long *num){
792 long rest;
793 int i;
794 for (i=0;num[i+1]!=0;i++){
795 do {
796 rest=num[i] % num[i+1];
797 num[i]=num[i+1]; num[i+1]=rest;
798 } while (rest!=0);
799 num[i+1] = num[i];
800 }
801 /* return i==0?num[i]:num[i-1]; */
802 return num[i];
803 }
805 /* run the rpn calculator on all the VDEF and CDEF arguments */
806 int
807 data_calc( image_desc_t *im){
809 int gdi;
810 int dataidx;
811 long *steparray, rpi;
812 int stepcnt;
813 time_t now;
814 rpnstack_t rpnstack;
816 rpnstack_init(&rpnstack);
818 for (gdi=0;gdi<im->gdes_c;gdi++){
819 /* Look for GF_VDEF and GF_CDEF in the same loop,
820 * so CDEFs can use VDEFs and vice versa
821 */
822 switch (im->gdes[gdi].gf) {
823 case GF_XPORT:
824 break;
825 case GF_SHIFT: {
826 graph_desc_t *vdp = &im->gdes[im->gdes[gdi].vidx];
828 /* remove current shift */
829 vdp->start -= vdp->shift;
830 vdp->end -= vdp->shift;
832 /* vdef */
833 if (im->gdes[gdi].shidx >= 0)
834 vdp->shift = im->gdes[im->gdes[gdi].shidx].vf.val;
835 /* constant */
836 else
837 vdp->shift = im->gdes[gdi].shval;
839 /* normalize shift to multiple of consolidated step */
840 vdp->shift = (vdp->shift / (long)vdp->step) * (long)vdp->step;
842 /* apply shift */
843 vdp->start += vdp->shift;
844 vdp->end += vdp->shift;
845 break;
846 }
847 case GF_VDEF:
848 /* A VDEF has no DS. This also signals other parts
849 * of rrdtool that this is a VDEF value, not a CDEF.
850 */
851 im->gdes[gdi].ds_cnt = 0;
852 if (vdef_calc(im,gdi)) {
853 rrd_set_error("Error processing VDEF '%s'"
854 ,im->gdes[gdi].vname
855 );
856 rpnstack_free(&rpnstack);
857 return -1;
858 }
859 break;
860 case GF_CDEF:
861 im->gdes[gdi].ds_cnt = 1;
862 im->gdes[gdi].ds = 0;
863 im->gdes[gdi].data_first = 1;
864 im->gdes[gdi].start = 0;
865 im->gdes[gdi].end = 0;
866 steparray=NULL;
867 stepcnt = 0;
868 dataidx=-1;
870 /* Find the variables in the expression.
871 * - VDEF variables are substituted by their values
872 * and the opcode is changed into OP_NUMBER.
873 * - CDEF variables are analized for their step size,
874 * the lowest common denominator of all the step
875 * sizes of the data sources involved is calculated
876 * and the resulting number is the step size for the
877 * resulting data source.
878 */
879 for(rpi=0;im->gdes[gdi].rpnp[rpi].op != OP_END;rpi++){
880 if(im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
881 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER){
882 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
883 if (im->gdes[ptr].ds_cnt == 0) { /* this is a VDEF data source */
884 #if 0
885 printf("DEBUG: inside CDEF '%s' processing VDEF '%s'\n",
886 im->gdes[gdi].vname,
887 im->gdes[ptr].vname);
888 printf("DEBUG: value from vdef is %f\n",im->gdes[ptr].vf.val);
889 #endif
890 im->gdes[gdi].rpnp[rpi].val = im->gdes[ptr].vf.val;
891 im->gdes[gdi].rpnp[rpi].op = OP_NUMBER;
892 } else { /* normal variables and PREF(variables) */
894 /* add one entry to the array that keeps track of the step sizes of the
895 * data sources going into the CDEF. */
896 if ((steparray =
897 rrd_realloc(steparray,
898 (++stepcnt+1)*sizeof(*steparray)))==NULL){
899 rrd_set_error("realloc steparray");
900 rpnstack_free(&rpnstack);
901 return -1;
902 };
904 steparray[stepcnt-1] = im->gdes[ptr].step;
906 /* adjust start and end of cdef (gdi) so
907 * that it runs from the latest start point
908 * to the earliest endpoint of any of the
909 * rras involved (ptr)
910 */
912 if(im->gdes[gdi].start < im->gdes[ptr].start)
913 im->gdes[gdi].start = im->gdes[ptr].start;
915 if(im->gdes[gdi].end == 0 ||
916 im->gdes[gdi].end > im->gdes[ptr].end)
917 im->gdes[gdi].end = im->gdes[ptr].end;
919 /* store pointer to the first element of
920 * the rra providing data for variable,
921 * further save step size and data source
922 * count of this rra
923 */
924 im->gdes[gdi].rpnp[rpi].data = im->gdes[ptr].data + im->gdes[ptr].ds;
925 im->gdes[gdi].rpnp[rpi].step = im->gdes[ptr].step;
926 im->gdes[gdi].rpnp[rpi].ds_cnt = im->gdes[ptr].ds_cnt;
928 /* backoff the *.data ptr; this is done so
929 * rpncalc() function doesn't have to treat
930 * the first case differently
931 */
932 } /* if ds_cnt != 0 */
933 } /* if OP_VARIABLE */
934 } /* loop through all rpi */
936 /* move the data pointers to the correct period */
937 for(rpi=0;im->gdes[gdi].rpnp[rpi].op != OP_END;rpi++){
938 if(im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
939 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER){
940 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
941 long diff = im->gdes[gdi].start - im->gdes[ptr].start;
943 if(diff > 0)
944 im->gdes[gdi].rpnp[rpi].data += (diff / im->gdes[ptr].step) * im->gdes[ptr].ds_cnt;
945 }
946 }
948 if(steparray == NULL){
949 rrd_set_error("rpn expressions without DEF"
950 " or CDEF variables are not supported");
951 rpnstack_free(&rpnstack);
952 return -1;
953 }
954 steparray[stepcnt]=0;
955 /* Now find the resulting step. All steps in all
956 * used RRAs have to be visited
957 */
958 im->gdes[gdi].step = lcd(steparray);
959 free(steparray);
960 if((im->gdes[gdi].data = malloc((
961 (im->gdes[gdi].end-im->gdes[gdi].start)
962 / im->gdes[gdi].step)
963 * sizeof(double)))==NULL){
964 rrd_set_error("malloc im->gdes[gdi].data");
965 rpnstack_free(&rpnstack);
966 return -1;
967 }
969 /* Step through the new cdef results array and
970 * calculate the values
971 */
972 for (now = im->gdes[gdi].start + im->gdes[gdi].step;
973 now<=im->gdes[gdi].end;
974 now += im->gdes[gdi].step)
975 {
976 rpnp_t *rpnp = im -> gdes[gdi].rpnp;
978 /* 3rd arg of rpn_calc is for OP_VARIABLE lookups;
979 * in this case we are advancing by timesteps;
980 * we use the fact that time_t is a synonym for long
981 */
982 if (rpn_calc(rpnp,&rpnstack,(long) now,
983 im->gdes[gdi].data,++dataidx) == -1) {
984 /* rpn_calc sets the error string */
985 rpnstack_free(&rpnstack);
986 return -1;
987 }
988 } /* enumerate over time steps within a CDEF */
989 break;
990 default:
991 continue;
992 }
993 } /* enumerate over CDEFs */
994 rpnstack_free(&rpnstack);
995 return 0;
996 }
998 /* massage data so, that we get one value for each x coordinate in the graph */
999 int
1000 data_proc( image_desc_t *im ){
1001 long i,ii;
1002 double pixstep = (double)(im->end-im->start)
1003 /(double)im->xsize; /* how much time
1004 passes in one pixel */
1005 double paintval;
1006 double minval=DNAN,maxval=DNAN;
1008 unsigned long gr_time;
1010 /* memory for the processed data */
1011 for(i=0;i<im->gdes_c;i++) {
1012 if((im->gdes[i].gf==GF_LINE) ||
1013 (im->gdes[i].gf==GF_AREA) ||
1014 (im->gdes[i].gf==GF_TICK)) {
1015 if((im->gdes[i].p_data = malloc((im->xsize +1)
1016 * sizeof(rrd_value_t)))==NULL){
1017 rrd_set_error("malloc data_proc");
1018 return -1;
1019 }
1020 }
1021 }
1023 for (i=0;i<im->xsize;i++) { /* for each pixel */
1024 long vidx;
1025 gr_time = im->start+pixstep*i; /* time of the current step */
1026 paintval=0.0;
1028 for (ii=0;ii<im->gdes_c;ii++) {
1029 double value;
1030 switch (im->gdes[ii].gf) {
1031 case GF_LINE:
1032 case GF_AREA:
1033 case GF_TICK:
1034 if (!im->gdes[ii].stack)
1035 paintval = 0.0;
1036 value = im->gdes[ii].yrule;
1037 if (isnan(value) || (im->gdes[ii].gf == GF_TICK)) {
1038 /* The time of the data doesn't necessarily match
1039 ** the time of the graph. Beware.
1040 */
1041 vidx = im->gdes[ii].vidx;
1042 if (im->gdes[vidx].gf == GF_VDEF) {
1043 value = im->gdes[vidx].vf.val;
1044 } else if (((long int)gr_time >= (long int)im->gdes[vidx].start) &&
1045 ((long int)gr_time <= (long int)im->gdes[vidx].end) ) {
1046 value = im->gdes[vidx].data[
1047 (unsigned long) floor(
1048 (double)(gr_time - im->gdes[vidx].start)
1049 / im->gdes[vidx].step)
1050 * im->gdes[vidx].ds_cnt
1051 + im->gdes[vidx].ds
1052 ];
1053 } else {
1054 value = DNAN;
1055 }
1056 };
1058 if (! isnan(value)) {
1059 paintval += value;
1060 im->gdes[ii].p_data[i] = paintval;
1061 /* GF_TICK: the data values are not
1062 ** relevant for min and max
1063 */
1064 if (finite(paintval) && im->gdes[ii].gf != GF_TICK ) {
1065 if (isnan(minval) || paintval < minval)
1066 minval = paintval;
1067 if (isnan(maxval) || paintval > maxval)
1068 maxval = paintval;
1069 }
1070 } else {
1071 im->gdes[ii].p_data[i] = DNAN;
1072 }
1073 break;
1074 case GF_STACK:
1075 rrd_set_error("STACK should already be turned into LINE or AREA here");
1076 return -1;
1077 break;
1078 default:
1079 break;
1080 }
1081 }
1082 }
1084 /* if min or max have not been asigned a value this is because
1085 there was no data in the graph ... this is not good ...
1086 lets set these to dummy values then ... */
1088 if (im->logarithmic) {
1089 if (isnan(minval)) minval = 0.2;
1090 if (isnan(maxval)) maxval = 5.1;
1091 }
1092 else {
1093 if (isnan(minval)) minval = 0.0;
1094 if (isnan(maxval)) maxval = 1.0;
1095 }
1097 /* adjust min and max values */
1098 if (isnan(im->minval)
1099 /* don't adjust low-end with log scale */ /* why not? */
1100 || ((!im->rigid) && im->minval > minval)
1101 ) {
1102 if (im->logarithmic)
1103 im->minval = minval * 0.5;
1104 else
1105 im->minval = minval;
1106 }
1107 if (isnan(im->maxval)
1108 || (!im->rigid && im->maxval < maxval)
1109 ) {
1110 if (im->logarithmic)
1111 im->maxval = maxval * 2.0;
1112 else
1113 im->maxval = maxval;
1114 }
1115 /* make sure min is smaller than max */
1116 if (im->minval > im->maxval) {
1117 im->minval = 0.99 * im->maxval;
1118 }
1120 /* make sure min and max are not equal */
1121 if (im->minval == im->maxval) {
1122 im->maxval *= 1.01;
1123 if (! im->logarithmic) {
1124 im->minval *= 0.99;
1125 }
1126 /* make sure min and max are not both zero */
1127 if (im->maxval == 0.0) {
1128 im->maxval = 1.0;
1129 }
1130 }
1131 return 0;
1132 }
1136 /* identify the point where the first gridline, label ... gets placed */
1138 time_t
1139 find_first_time(
1140 time_t start, /* what is the initial time */
1141 enum tmt_en baseint, /* what is the basic interval */
1142 long basestep /* how many if these do we jump a time */
1143 )
1144 {
1145 struct tm tm;
1146 localtime_r(&start, &tm);
1147 switch(baseint){
1148 case TMT_SECOND:
1149 tm.tm_sec -= tm.tm_sec % basestep; break;
1150 case TMT_MINUTE:
1151 tm.tm_sec=0;
1152 tm.tm_min -= tm.tm_min % basestep;
1153 break;
1154 case TMT_HOUR:
1155 tm.tm_sec=0;
1156 tm.tm_min = 0;
1157 tm.tm_hour -= tm.tm_hour % basestep; break;
1158 case TMT_DAY:
1159 /* we do NOT look at the basestep for this ... */
1160 tm.tm_sec=0;
1161 tm.tm_min = 0;
1162 tm.tm_hour = 0; break;
1163 case TMT_WEEK:
1164 /* we do NOT look at the basestep for this ... */
1165 tm.tm_sec=0;
1166 tm.tm_min = 0;
1167 tm.tm_hour = 0;
1168 tm.tm_mday -= tm.tm_wday -1; /* -1 because we want the monday */
1169 if (tm.tm_wday==0) tm.tm_mday -= 7; /* we want the *previous* monday */
1170 break;
1171 case TMT_MONTH:
1172 tm.tm_sec=0;
1173 tm.tm_min = 0;
1174 tm.tm_hour = 0;
1175 tm.tm_mday = 1;
1176 tm.tm_mon -= tm.tm_mon % basestep; break;
1178 case TMT_YEAR:
1179 tm.tm_sec=0;
1180 tm.tm_min = 0;
1181 tm.tm_hour = 0;
1182 tm.tm_mday = 1;
1183 tm.tm_mon = 0;
1184 tm.tm_year -= (tm.tm_year+1900) % basestep;
1186 }
1187 return mktime(&tm);
1188 }
1189 /* identify the point where the next gridline, label ... gets placed */
1190 time_t
1191 find_next_time(
1192 time_t current, /* what is the initial time */
1193 enum tmt_en baseint, /* what is the basic interval */
1194 long basestep /* how many if these do we jump a time */
1195 )
1196 {
1197 struct tm tm;
1198 time_t madetime;
1199 localtime_r(¤t, &tm);
1200 do {
1201 switch(baseint){
1202 case TMT_SECOND:
1203 tm.tm_sec += basestep; break;
1204 case TMT_MINUTE:
1205 tm.tm_min += basestep; break;
1206 case TMT_HOUR:
1207 tm.tm_hour += basestep; break;
1208 case TMT_DAY:
1209 tm.tm_mday += basestep; break;
1210 case TMT_WEEK:
1211 tm.tm_mday += 7*basestep; break;
1212 case TMT_MONTH:
1213 tm.tm_mon += basestep; break;
1214 case TMT_YEAR:
1215 tm.tm_year += basestep;
1216 }
1217 madetime = mktime(&tm);
1218 } while (madetime == -1); /* this is necessary to skip impssible times
1219 like the daylight saving time skips */
1220 return madetime;
1222 }
1225 /* calculate values required for PRINT and GPRINT functions */
1227 int
1228 print_calc(image_desc_t *im, char ***prdata)
1229 {
1230 long i,ii,validsteps;
1231 double printval;
1232 struct tm tmvdef;
1233 int graphelement = 0;
1234 long vidx;
1235 int max_ii;
1236 double magfact = -1;
1237 char *si_symb = "";
1238 char *percent_s;
1239 int prlines = 1;
1240 /* wow initializing tmvdef is quite a task :-) */
1241 time_t now = time(NULL);
1242 localtime_r(&now,&tmvdef);
1243 if (im->imginfo) prlines++;
1244 for(i=0;i<im->gdes_c;i++){
1245 switch(im->gdes[i].gf){
1246 case GF_PRINT:
1247 prlines++;
1248 if(((*prdata) = rrd_realloc((*prdata),prlines*sizeof(char *)))==NULL){
1249 rrd_set_error("realloc prdata");
1250 return 0;
1251 }
1252 case GF_GPRINT:
1253 /* PRINT and GPRINT can now print VDEF generated values.
1254 * There's no need to do any calculations on them as these
1255 * calculations were already made.
1256 */
1257 vidx = im->gdes[i].vidx;
1258 if (im->gdes[vidx].gf==GF_VDEF) { /* simply use vals */
1259 printval = im->gdes[vidx].vf.val;
1260 localtime_r(&im->gdes[vidx].vf.when,&tmvdef);
1261 } else { /* need to calculate max,min,avg etcetera */
1262 max_ii =((im->gdes[vidx].end
1263 - im->gdes[vidx].start)
1264 / im->gdes[vidx].step
1265 * im->gdes[vidx].ds_cnt);
1266 printval = DNAN;
1267 validsteps = 0;
1268 for( ii=im->gdes[vidx].ds;
1269 ii < max_ii;
1270 ii+=im->gdes[vidx].ds_cnt){
1271 if (! finite(im->gdes[vidx].data[ii]))
1272 continue;
1273 if (isnan(printval)){
1274 printval = im->gdes[vidx].data[ii];
1275 validsteps++;
1276 continue;
1277 }
1279 switch (im->gdes[i].cf){
1280 case CF_HWPREDICT:
1281 case CF_DEVPREDICT:
1282 case CF_DEVSEASONAL:
1283 case CF_SEASONAL:
1284 case CF_AVERAGE:
1285 validsteps++;
1286 printval += im->gdes[vidx].data[ii];
1287 break;
1288 case CF_MINIMUM:
1289 printval = min( printval, im->gdes[vidx].data[ii]);
1290 break;
1291 case CF_FAILURES:
1292 case CF_MAXIMUM:
1293 printval = max( printval, im->gdes[vidx].data[ii]);
1294 break;
1295 case CF_LAST:
1296 printval = im->gdes[vidx].data[ii];
1297 }
1298 }
1299 if (im->gdes[i].cf==CF_AVERAGE || im->gdes[i].cf > CF_LAST) {
1300 if (validsteps > 1) {
1301 printval = (printval / validsteps);
1302 }
1303 }
1304 } /* prepare printval */
1306 if ((percent_s = strstr(im->gdes[i].format,"%S")) != NULL) {
1307 /* Magfact is set to -1 upon entry to print_calc. If it
1308 * is still less than 0, then we need to run auto_scale.
1309 * Otherwise, put the value into the correct units. If
1310 * the value is 0, then do not set the symbol or magnification
1311 * so next the calculation will be performed again. */
1312 if (magfact < 0.0) {
1313 auto_scale(im,&printval,&si_symb,&magfact);
1314 if (printval == 0.0)
1315 magfact = -1.0;
1316 } else {
1317 printval /= magfact;
1318 }
1319 *(++percent_s) = 's';
1320 } else if (strstr(im->gdes[i].format,"%s") != NULL) {
1321 auto_scale(im,&printval,&si_symb,&magfact);
1322 }
1324 if (im->gdes[i].gf == GF_PRINT){
1325 (*prdata)[prlines-2] = malloc((FMT_LEG_LEN+2)*sizeof(char));
1326 (*prdata)[prlines-1] = NULL;
1327 if (im->gdes[i].strftm){
1328 strftime((*prdata)[prlines-2],FMT_LEG_LEN,im->gdes[i].format,&tmvdef);
1329 } else {
1330 if (bad_format(im->gdes[i].format)) {
1331 rrd_set_error("bad format for PRINT in '%s'", im->gdes[i].format);
1332 return -1;
1333 }
1335 #ifdef HAVE_SNPRINTF
1336 snprintf((*prdata)[prlines-2],FMT_LEG_LEN,im->gdes[i].format,printval,si_symb);
1337 #else
1338 sprintf((*prdata)[prlines-2],im->gdes[i].format,printval,si_symb);
1339 #endif
1340 }
1341 } else {
1342 /* GF_GPRINT */
1344 if (im->gdes[i].strftm){
1345 strftime(im->gdes[i].legend,FMT_LEG_LEN,im->gdes[i].format,&tmvdef);
1346 } else {
1347 if (bad_format(im->gdes[i].format)) {
1348 rrd_set_error("bad format for GPRINT in '%s'", im->gdes[i].format);
1349 return -1;
1350 }
1351 #ifdef HAVE_SNPRINTF
1352 snprintf(im->gdes[i].legend,FMT_LEG_LEN-2,im->gdes[i].format,printval,si_symb);
1353 #else
1354 sprintf(im->gdes[i].legend,im->gdes[i].format,printval,si_symb);
1355 #endif
1356 }
1357 graphelement = 1;
1358 }
1359 break;
1360 case GF_LINE:
1361 case GF_AREA:
1362 case GF_TICK:
1363 graphelement = 1;
1364 break;
1365 case GF_HRULE:
1366 if(isnan(im->gdes[i].yrule)) { /* we must set this here or the legend printer can not decide to print the legend */
1367 im->gdes[i].yrule=im->gdes[im->gdes[i].vidx].vf.val;
1368 };
1369 graphelement = 1;
1370 break;
1371 case GF_VRULE:
1372 if(im->gdes[i].xrule == 0) { /* again ... the legend printer needs it*/
1373 im->gdes[i].xrule = im->gdes[im->gdes[i].vidx].vf.when;
1374 };
1375 graphelement = 1;
1376 break;
1377 case GF_COMMENT:
1378 case GF_DEF:
1379 case GF_CDEF:
1380 case GF_VDEF:
1381 #ifdef WITH_PIECHART
1382 case GF_PART:
1383 #endif
1384 case GF_SHIFT:
1385 case GF_XPORT:
1386 break;
1387 case GF_STACK:
1388 rrd_set_error("STACK should already be turned into LINE or AREA here");
1389 return -1;
1390 break;
1391 }
1392 }
1393 return graphelement;
1394 }
1397 /* place legends with color spots */
1398 int
1399 leg_place(image_desc_t *im)
1400 {
1401 /* graph labels */
1402 int interleg = im->text_prop[TEXT_PROP_LEGEND].size*2.0;
1403 int border = im->text_prop[TEXT_PROP_LEGEND].size*2.0;
1404 int fill=0, fill_last;
1405 int leg_c = 0;
1406 int leg_x = border, leg_y = im->yimg;
1407 int leg_y_prev = im->yimg;
1408 int leg_cc;
1409 int glue = 0;
1410 int i,ii, mark = 0;
1411 char prt_fctn; /*special printfunctions */
1412 int *legspace;
1414 if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
1415 if ((legspace = malloc(im->gdes_c*sizeof(int)))==NULL){
1416 rrd_set_error("malloc for legspace");
1417 return -1;
1418 }
1420 for(i=0;i<im->gdes_c;i++){
1421 fill_last = fill;
1423 /* hid legends for rules which are not displayed */
1425 if(!(im->extra_flags & FORCE_RULES_LEGEND)) {
1426 if (im->gdes[i].gf == GF_HRULE &&
1427 (im->gdes[i].yrule < im->minval || im->gdes[i].yrule > im->maxval))
1428 im->gdes[i].legend[0] = '\0';
1430 if (im->gdes[i].gf == GF_VRULE &&
1431 (im->gdes[i].xrule < im->start || im->gdes[i].xrule > im->end))
1432 im->gdes[i].legend[0] = '\0';
1433 }
1435 leg_cc = strlen(im->gdes[i].legend);
1437 /* is there a controle code ant the end of the legend string ? */
1438 /* and it is not a tab \\t */
1439 if (leg_cc >= 2 && im->gdes[i].legend[leg_cc-2] == '\\' && im->gdes[i].legend[leg_cc-1] != 't') {
1440 prt_fctn = im->gdes[i].legend[leg_cc-1];
1441 leg_cc -= 2;
1442 im->gdes[i].legend[leg_cc] = '\0';
1443 } else {
1444 prt_fctn = '\0';
1445 }
1446 /* remove exess space */
1447 while (prt_fctn=='g' &&
1448 leg_cc > 0 &&
1449 im->gdes[i].legend[leg_cc-1]==' '){
1450 leg_cc--;
1451 im->gdes[i].legend[leg_cc]='\0';
1452 }
1453 if (leg_cc != 0 ){
1454 legspace[i]=(prt_fctn=='g' ? 0 : interleg);
1456 if (fill > 0){
1457 /* no interleg space if string ends in \g */
1458 fill += legspace[i];
1459 }
1460 fill += gfx_get_text_width(im->canvas, fill+border,
1461 im->text_prop[TEXT_PROP_LEGEND].font,
1462 im->text_prop[TEXT_PROP_LEGEND].size,
1463 im->tabwidth,
1464 im->gdes[i].legend, 0);
1465 leg_c++;
1466 } else {
1467 legspace[i]=0;
1468 }
1469 /* who said there was a special tag ... ?*/
1470 if (prt_fctn=='g') {
1471 prt_fctn = '\0';
1472 }
1473 if (prt_fctn == '\0') {
1474 if (i == im->gdes_c -1 ) prt_fctn ='l';
1476 /* is it time to place the legends ? */
1477 if (fill > im->ximg - 2*border){
1478 if (leg_c > 1) {
1479 /* go back one */
1480 i--;
1481 fill = fill_last;
1482 leg_c--;
1483 prt_fctn = 'j';
1484 } else {
1485 prt_fctn = 'l';
1486 }
1488 }
1489 }
1492 if (prt_fctn != '\0'){
1493 leg_x = border;
1494 if (leg_c >= 2 && prt_fctn == 'j') {
1495 glue = (im->ximg - fill - 2* border) / (leg_c-1);
1496 } else {
1497 glue = 0;
1498 }
1499 if (prt_fctn =='c') leg_x = (im->ximg - fill) / 2.0;
1500 if (prt_fctn =='r') leg_x = im->ximg - fill - border;
1502 for(ii=mark;ii<=i;ii++){
1503 if(im->gdes[ii].legend[0]=='\0')
1504 continue; /* skip empty legends */
1505 im->gdes[ii].leg_x = leg_x;
1506 im->gdes[ii].leg_y = leg_y;
1507 leg_x +=
1508 gfx_get_text_width(im->canvas, leg_x,
1509 im->text_prop[TEXT_PROP_LEGEND].font,
1510 im->text_prop[TEXT_PROP_LEGEND].size,
1511 im->tabwidth,
1512 im->gdes[ii].legend, 0)
1513 + legspace[ii]
1514 + glue;
1515 }
1516 leg_y_prev = leg_y;
1517 /* only add y space if there was text on the line */
1518 if (leg_x > border || prt_fctn == 's')
1519 leg_y += im->text_prop[TEXT_PROP_LEGEND].size*1.8;
1520 if (prt_fctn == 's')
1521 leg_y -= im->text_prop[TEXT_PROP_LEGEND].size;
1522 fill = 0;
1523 leg_c = 0;
1524 mark = ii;
1525 }
1526 }
1527 im->yimg = leg_y_prev;
1528 /* if we did place some legends we have to add vertical space */
1529 if (leg_y != im->yimg){
1530 im->yimg += im->text_prop[TEXT_PROP_LEGEND].size*1.8;
1531 }
1532 free(legspace);
1533 }
1534 return 0;
1535 }
1537 /* create a grid on the graph. it determines what to do
1538 from the values of xsize, start and end */
1540 /* the xaxis labels are determined from the number of seconds per pixel
1541 in the requested graph */
1545 int
1546 calc_horizontal_grid(image_desc_t *im)
1547 {
1548 double range;
1549 double scaledrange;
1550 int pixel,i;
1551 int gridind=0;
1552 int decimals, fractionals;
1554 im->ygrid_scale.labfact=2;
1555 range = im->maxval - im->minval;
1556 scaledrange = range / im->magfact;
1558 /* does the scale of this graph make it impossible to put lines
1559 on it? If so, give up. */
1560 if (isnan(scaledrange)) {
1561 return 0;
1562 }
1564 /* find grid spaceing */
1565 pixel=1;
1566 if(isnan(im->ygridstep)){
1567 if(im->extra_flags & ALTYGRID) {
1568 /* find the value with max number of digits. Get number of digits */
1569 decimals = ceil(log10(max(fabs(im->maxval), fabs(im->minval))*im->viewfactor/im->magfact));
1570 if(decimals <= 0) /* everything is small. make place for zero */
1571 decimals = 1;
1573 im->ygrid_scale.gridstep = pow((double)10, floor(log10(range*im->viewfactor/im->magfact)))/im->viewfactor*im->magfact;
1575 if(im->ygrid_scale.gridstep == 0) /* range is one -> 0.1 is reasonable scale */
1576 im->ygrid_scale.gridstep = 0.1;
1577 /* should have at least 5 lines but no more then 15 */
1578 if(range/im->ygrid_scale.gridstep < 5)
1579 im->ygrid_scale.gridstep /= 10;
1580 if(range/im->ygrid_scale.gridstep > 15)
1581 im->ygrid_scale.gridstep *= 10;
1582 if(range/im->ygrid_scale.gridstep > 5) {
1583 im->ygrid_scale.labfact = 1;
1584 if(range/im->ygrid_scale.gridstep > 8)
1585 im->ygrid_scale.labfact = 2;
1586 }
1587 else {
1588 im->ygrid_scale.gridstep /= 5;
1589 im->ygrid_scale.labfact = 5;
1590 }
1591 fractionals = floor(log10(im->ygrid_scale.gridstep*(double)im->ygrid_scale.labfact*im->viewfactor/im->magfact));
1592 if(fractionals < 0) { /* small amplitude. */
1593 int len = decimals - fractionals + 1;
1594 if (im->unitslength < len+2) im->unitslength = len+2;
1595 sprintf(im->ygrid_scale.labfmt, "%%%d.%df%s", len, -fractionals,(im->symbol != ' ' ? " %c" : ""));
1596 } else {
1597 int len = decimals + 1;
1598 if (im->unitslength < len+2) im->unitslength = len+2;
1599 sprintf(im->ygrid_scale.labfmt, "%%%d.0f%s", len, ( im->symbol != ' ' ? " %c" : "" ));
1600 }
1601 }
1602 else {
1603 for(i=0;ylab[i].grid > 0;i++){
1604 pixel = im->ysize / (scaledrange / ylab[i].grid);
1605 gridind = i;
1606 if (pixel > 7)
1607 break;
1608 }
1610 for(i=0; i<4;i++) {
1611 if (pixel * ylab[gridind].lfac[i] >= 2.5 * im->text_prop[TEXT_PROP_AXIS].size) {
1612 im->ygrid_scale.labfact = ylab[gridind].lfac[i];
1613 break;
1614 }
1615 }
1617 im->ygrid_scale.gridstep = ylab[gridind].grid * im->magfact;
1618 }
1619 } else {
1620 im->ygrid_scale.gridstep = im->ygridstep;
1621 im->ygrid_scale.labfact = im->ylabfact;
1622 }
1623 return 1;
1624 }
1626 int draw_horizontal_grid(image_desc_t *im)
1627 {
1628 int i;
1629 double scaledstep;
1630 char graph_label[100];
1631 int nlabels=0;
1632 double X0=im->xorigin;
1633 double X1=im->xorigin+im->xsize;
1635 int sgrid = (int)( im->minval / im->ygrid_scale.gridstep - 1);
1636 int egrid = (int)( im->maxval / im->ygrid_scale.gridstep + 1);
1637 double MaxY;
1638 scaledstep = im->ygrid_scale.gridstep/(double)im->magfact*(double)im->viewfactor;
1639 MaxY = scaledstep*(double)egrid;
1640 for (i = sgrid; i <= egrid; i++){
1641 double Y0=ytr(im,im->ygrid_scale.gridstep*i);
1642 double YN=ytr(im,im->ygrid_scale.gridstep*(i+1));
1643 if ( Y0 >= im->yorigin-im->ysize
1644 && Y0 <= im->yorigin){
1645 /* Make sure at least 2 grid labels are shown, even if it doesn't agree
1646 with the chosen settings. Add a label if required by settings, or if
1647 there is only one label so far and the next grid line is out of bounds. */
1648 if(i % im->ygrid_scale.labfact == 0 || ( nlabels==1 && (YN < im->yorigin-im->ysize || YN > im->yorigin) )){
1649 if (im->symbol == ' ') {
1650 if(im->extra_flags & ALTYGRID) {
1651 sprintf(graph_label,im->ygrid_scale.labfmt,scaledstep*(double)i);
1652 } else {
1653 if(MaxY < 10) {
1654 sprintf(graph_label,"%4.1f",scaledstep*(double)i);
1655 } else {
1656 sprintf(graph_label,"%4.0f",scaledstep*(double)i);
1657 }
1658 }
1659 }else {
1660 char sisym = ( i == 0 ? ' ' : im->symbol);
1661 if(im->extra_flags & ALTYGRID) {
1662 sprintf(graph_label,im->ygrid_scale.labfmt,scaledstep*(double)i,sisym);
1663 } else {
1664 if(MaxY < 10){
1665 sprintf(graph_label,"%4.1f %c",scaledstep*(double)i, sisym);
1666 } else {
1667 sprintf(graph_label,"%4.0f %c",scaledstep*(double)i, sisym);
1668 }
1669 }
1670 }
1671 nlabels++;
1673 gfx_new_text ( im->canvas,
1674 X0-im->text_prop[TEXT_PROP_AXIS].size, Y0,
1675 im->graph_col[GRC_FONT],
1676 im->text_prop[TEXT_PROP_AXIS].font,
1677 im->text_prop[TEXT_PROP_AXIS].size,
1678 im->tabwidth, 0.0, GFX_H_RIGHT, GFX_V_CENTER,
1679 graph_label );
1680 gfx_new_dashed_line ( im->canvas,
1681 X0-2,Y0,
1682 X1+2,Y0,
1683 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1684 im->grid_dash_on, im->grid_dash_off);
1686 } else if (!(im->extra_flags & NOMINOR)) {
1687 gfx_new_dashed_line ( im->canvas,
1688 X0-1,Y0,
1689 X1+1,Y0,
1690 GRIDWIDTH, im->graph_col[GRC_GRID],
1691 im->grid_dash_on, im->grid_dash_off);
1693 }
1694 }
1695 }
1696 return 1;
1697 }
1699 /* this is frexp for base 10 */
1700 double frexp10(double, double *);
1701 double frexp10(double x, double *e) {
1702 double mnt;
1703 int iexp;
1705 iexp = floor(log(fabs(x)) / log(10));
1706 mnt = x / pow(10.0, iexp);
1707 if(mnt >= 10.0) {
1708 iexp++;
1709 mnt = x / pow(10.0, iexp);
1710 }
1711 *e = iexp;
1712 return mnt;
1713 }
1715 /* logaritmic horizontal grid */
1716 int
1717 horizontal_log_grid(image_desc_t *im)
1718 {
1719 double yloglab[][10] = {
1720 {1.0, 10., 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0},
1721 {1.0, 5.0, 10., 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0},
1722 {1.0, 2.0, 5.0, 7.0, 10., 0.0, 0.0, 0.0, 0.0, 0.0},
1723 {1.0, 2.0, 4.0, 6.0, 8.0, 10., 0.0, 0.0, 0.0, 0.0},
1724 {1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.}};
1726 int i, j, val_exp, min_exp;
1727 double nex; /* number of decades in data */
1728 double logscale; /* scale in logarithmic space */
1729 int exfrac = 1; /* decade spacing */
1730 int mid = -1; /* row in yloglab for major grid */
1731 double mspac; /* smallest major grid spacing (pixels) */
1732 int flab; /* first value in yloglab to use */
1733 double value, tmp;
1734 double X0,X1,Y0;
1735 char graph_label[100];
1737 nex = log10(im->maxval / im->minval);
1738 logscale = im->ysize / nex;
1740 /* major spacing for data with high dynamic range */
1741 while(logscale * exfrac < 3 * im->text_prop[TEXT_PROP_LEGEND].size) {
1742 if(exfrac == 1) exfrac = 3;
1743 else exfrac += 3;
1744 }
1746 /* major spacing for less dynamic data */
1747 do {
1748 /* search best row in yloglab */
1749 mid++;
1750 for(i = 0; yloglab[mid][i + 1] < 10.0; i++);
1751 mspac = logscale * log10(10.0 / yloglab[mid][i]);
1752 } while(mspac > 2 * im->text_prop[TEXT_PROP_LEGEND].size && mid < 5);
1753 if(mid) mid--;
1755 /* find first value in yloglab */
1756 for(flab = 0; frexp10(im->minval, &tmp) > yloglab[mid][flab]; flab++);
1757 if(yloglab[mid][flab] == 10.0) {
1758 tmp += 1.0;
1759 flab = 0;
1760 }
1761 val_exp = tmp;
1762 if(val_exp % exfrac) val_exp += abs(-val_exp % exfrac);
1764 X0=im->xorigin;
1765 X1=im->xorigin+im->xsize;
1767 /* draw grid */
1768 while(1) {
1769 value = yloglab[mid][flab] * pow(10.0, val_exp);
1771 Y0 = ytr(im, value);
1772 if(Y0 <= im->yorigin - im->ysize) break;
1774 /* major grid line */
1775 gfx_new_dashed_line ( im->canvas,
1776 X0-2,Y0,
1777 X1+2,Y0,
1778 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1779 im->grid_dash_on, im->grid_dash_off);
1781 /* label */
1782 if (im->extra_flags & FORCE_UNITS_SI) {
1783 int scale;
1784 double pvalue;
1785 char symbol;
1787 scale = floor(val_exp / 3.0);
1788 if( value >= 1.0 ) pvalue = pow(10.0, val_exp % 3);
1789 else pvalue = pow(10.0, ((val_exp + 1) % 3) + 2);
1790 pvalue *= yloglab[mid][flab];
1792 if ( ((scale+si_symbcenter) < (int)sizeof(si_symbol)) &&
1793 ((scale+si_symbcenter) >= 0) )
1794 symbol = si_symbol[scale+si_symbcenter];
1795 else
1796 symbol = '?';
1798 sprintf(graph_label,"%3.0f %c", pvalue, symbol);
1799 } else
1800 sprintf(graph_label,"%3.0e", value);
1801 gfx_new_text ( im->canvas,
1802 X0-im->text_prop[TEXT_PROP_AXIS].size, Y0,
1803 im->graph_col[GRC_FONT],
1804 im->text_prop[TEXT_PROP_AXIS].font,
1805 im->text_prop[TEXT_PROP_AXIS].size,
1806 im->tabwidth,0.0, GFX_H_RIGHT, GFX_V_CENTER,
1807 graph_label );
1809 /* minor grid */
1810 if(mid < 4 && exfrac == 1) {
1811 /* find first and last minor line behind current major line
1812 * i is the first line and j tha last */
1813 if(flab == 0) {
1814 min_exp = val_exp - 1;
1815 for(i = 1; yloglab[mid][i] < 10.0; i++);
1816 i = yloglab[mid][i - 1] + 1;
1817 j = 10;
1818 }
1819 else {
1820 min_exp = val_exp;
1821 i = yloglab[mid][flab - 1] + 1;
1822 j = yloglab[mid][flab];
1823 }
1825 /* draw minor lines below current major line */
1826 for(; i < j; i++) {
1828 value = i * pow(10.0, min_exp);
1829 if(value < im->minval) continue;
1831 Y0 = ytr(im, value);
1832 if(Y0 <= im->yorigin - im->ysize) break;
1834 /* draw lines */
1835 gfx_new_dashed_line ( im->canvas,
1836 X0-1,Y0,
1837 X1+1,Y0,
1838 GRIDWIDTH, im->graph_col[GRC_GRID],
1839 im->grid_dash_on, im->grid_dash_off);
1840 }
1841 }
1842 else if(exfrac > 1) {
1843 for(i = val_exp - exfrac / 3 * 2; i < val_exp; i += exfrac / 3) {
1844 value = pow(10.0, i);
1845 if(value < im->minval) continue;
1847 Y0 = ytr(im, value);
1848 if(Y0 <= im->yorigin - im->ysize) break;
1850 /* draw lines */
1851 gfx_new_dashed_line ( im->canvas,
1852 X0-1,Y0,
1853 X1+1,Y0,
1854 GRIDWIDTH, im->graph_col[GRC_GRID],
1855 im->grid_dash_on, im->grid_dash_off);
1856 }
1857 }
1859 /* next decade */
1860 if(yloglab[mid][++flab] == 10.0) {
1861 flab = 0;
1862 val_exp += exfrac;
1863 }
1864 }
1866 /* draw minor lines after highest major line */
1867 if(mid < 4 && exfrac == 1) {
1868 /* find first and last minor line below current major line
1869 * i is the first line and j tha last */
1870 if(flab == 0) {
1871 min_exp = val_exp - 1;
1872 for(i = 1; yloglab[mid][i] < 10.0; i++);
1873 i = yloglab[mid][i - 1] + 1;
1874 j = 10;
1875 }
1876 else {
1877 min_exp = val_exp;
1878 i = yloglab[mid][flab - 1] + 1;
1879 j = yloglab[mid][flab];
1880 }
1882 /* draw minor lines below current major line */
1883 for(; i < j; i++) {
1885 value = i * pow(10.0, min_exp);
1886 if(value < im->minval) continue;
1888 Y0 = ytr(im, value);
1889 if(Y0 <= im->yorigin - im->ysize) break;
1891 /* draw lines */
1892 gfx_new_dashed_line ( im->canvas,
1893 X0-1,Y0,
1894 X1+1,Y0,
1895 GRIDWIDTH, im->graph_col[GRC_GRID],
1896 im->grid_dash_on, im->grid_dash_off);
1897 }
1898 }
1899 /* fancy minor gridlines */
1900 else if(exfrac > 1) {
1901 for(i = val_exp - exfrac / 3 * 2; i < val_exp; i += exfrac / 3) {
1902 value = pow(10.0, i);
1903 if(value < im->minval) continue;
1905 Y0 = ytr(im, value);
1906 if(Y0 <= im->yorigin - im->ysize) break;
1908 /* draw lines */
1909 gfx_new_dashed_line ( im->canvas,
1910 X0-1,Y0,
1911 X1+1,Y0,
1912 GRIDWIDTH, im->graph_col[GRC_GRID],
1913 im->grid_dash_on, im->grid_dash_off);
1914 }
1915 }
1917 return 1;
1918 }
1921 void
1922 vertical_grid(
1923 image_desc_t *im )
1924 {
1925 int xlab_sel; /* which sort of label and grid ? */
1926 time_t ti, tilab, timajor;
1927 long factor;
1928 char graph_label[100];
1929 double X0,Y0,Y1; /* points for filled graph and more*/
1930 struct tm tm;
1932 /* the type of time grid is determined by finding
1933 the number of seconds per pixel in the graph */
1936 if(im->xlab_user.minsec == -1){
1937 factor=(im->end - im->start)/im->xsize;
1938 xlab_sel=0;
1939 while ( xlab[xlab_sel+1].minsec != -1
1940 && xlab[xlab_sel+1].minsec <= factor) { xlab_sel++; } /* pick the last one */
1941 while ( xlab[xlab_sel-1].minsec == xlab[xlab_sel].minsec
1942 && xlab[xlab_sel].length > (im->end - im->start)) { xlab_sel--; } /* go back to the smallest size */
1943 im->xlab_user.gridtm = xlab[xlab_sel].gridtm;
1944 im->xlab_user.gridst = xlab[xlab_sel].gridst;
1945 im->xlab_user.mgridtm = xlab[xlab_sel].mgridtm;
1946 im->xlab_user.mgridst = xlab[xlab_sel].mgridst;
1947 im->xlab_user.labtm = xlab[xlab_sel].labtm;
1948 im->xlab_user.labst = xlab[xlab_sel].labst;
1949 im->xlab_user.precis = xlab[xlab_sel].precis;
1950 im->xlab_user.stst = xlab[xlab_sel].stst;
1951 }
1953 /* y coords are the same for every line ... */
1954 Y0 = im->yorigin;
1955 Y1 = im->yorigin-im->ysize;
1958 /* paint the minor grid */
1959 if (!(im->extra_flags & NOMINOR))
1960 {
1961 for(ti = find_first_time(im->start,
1962 im->xlab_user.gridtm,
1963 im->xlab_user.gridst),
1964 timajor = find_first_time(im->start,
1965 im->xlab_user.mgridtm,
1966 im->xlab_user.mgridst);
1967 ti < im->end;
1968 ti = find_next_time(ti,im->xlab_user.gridtm,im->xlab_user.gridst)
1969 ){
1970 /* are we inside the graph ? */
1971 if (ti < im->start || ti > im->end) continue;
1972 while (timajor < ti) {
1973 timajor = find_next_time(timajor,
1974 im->xlab_user.mgridtm, im->xlab_user.mgridst);
1975 }
1976 if (ti == timajor) continue; /* skip as falls on major grid line */
1977 X0 = xtr(im,ti);
1978 gfx_new_dashed_line(im->canvas,X0,Y0+1, X0,Y1-1,GRIDWIDTH,
1979 im->graph_col[GRC_GRID],
1980 im->grid_dash_on, im->grid_dash_off);
1982 }
1983 }
1985 /* paint the major grid */
1986 for(ti = find_first_time(im->start,
1987 im->xlab_user.mgridtm,
1988 im->xlab_user.mgridst);
1989 ti < im->end;
1990 ti = find_next_time(ti,im->xlab_user.mgridtm,im->xlab_user.mgridst)
1991 ){
1992 /* are we inside the graph ? */
1993 if (ti < im->start || ti > im->end) continue;
1994 X0 = xtr(im,ti);
1995 gfx_new_dashed_line(im->canvas,X0,Y0+3, X0,Y1-2,MGRIDWIDTH,
1996 im->graph_col[GRC_MGRID],
1997 im->grid_dash_on, im->grid_dash_off);
1999 }
2000 /* paint the labels below the graph */
2001 for(ti = find_first_time(im->start - im->xlab_user.precis/2,
2002 im->xlab_user.labtm,
2003 im->xlab_user.labst);
2004 ti <= im->end - im->xlab_user.precis/2;
2005 ti = find_next_time(ti,im->xlab_user.labtm,im->xlab_user.labst)
2006 ){
2007 tilab= ti + im->xlab_user.precis/2; /* correct time for the label */
2008 /* are we inside the graph ? */
2009 if (tilab < im->start || tilab > im->end) continue;
2011 #if HAVE_STRFTIME
2012 localtime_r(&tilab, &tm);
2013 strftime(graph_label,99,im->xlab_user.stst, &tm);
2014 #else
2015 # error "your libc has no strftime I guess we'll abort the exercise here."
2016 #endif
2017 gfx_new_text ( im->canvas,
2018 xtr(im,tilab), Y0+im->text_prop[TEXT_PROP_AXIS].size*1.4+5,
2019 im->graph_col[GRC_FONT],
2020 im->text_prop[TEXT_PROP_AXIS].font,
2021 im->text_prop[TEXT_PROP_AXIS].size,
2022 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_BOTTOM,
2023 graph_label );
2025 }
2027 }
2030 void
2031 axis_paint(
2032 image_desc_t *im
2033 )
2034 {
2035 /* draw x and y axis */
2036 /* gfx_new_line ( im->canvas, im->xorigin+im->xsize,im->yorigin,
2037 im->xorigin+im->xsize,im->yorigin-im->ysize,
2038 GRIDWIDTH, im->graph_col[GRC_AXIS]);
2040 gfx_new_line ( im->canvas, im->xorigin,im->yorigin-im->ysize,
2041 im->xorigin+im->xsize,im->yorigin-im->ysize,
2042 GRIDWIDTH, im->graph_col[GRC_AXIS]); */
2044 gfx_new_line ( im->canvas, im->xorigin-4,im->yorigin,
2045 im->xorigin+im->xsize+4,im->yorigin,
2046 MGRIDWIDTH, im->graph_col[GRC_AXIS]);
2048 gfx_new_line ( im->canvas, im->xorigin,im->yorigin+4,
2049 im->xorigin,im->yorigin-im->ysize-4,
2050 MGRIDWIDTH, im->graph_col[GRC_AXIS]);
2053 /* arrow for X and Y axis direction */
2054 gfx_new_area ( im->canvas,
2055 im->xorigin+im->xsize+2, im->yorigin-2,
2056 im->xorigin+im->xsize+2, im->yorigin+3,
2057 im->xorigin+im->xsize+7, im->yorigin+0.5, /* LINEOFFSET */
2058 im->graph_col[GRC_ARROW]);
2060 gfx_new_area ( im->canvas,
2061 im->xorigin-2, im->yorigin-im->ysize-2,
2062 im->xorigin+3, im->yorigin-im->ysize-2,
2063 im->xorigin+0.5, im->yorigin-im->ysize-7, /* LINEOFFSET */
2064 im->graph_col[GRC_ARROW]);
2066 }
2068 void
2069 grid_paint(image_desc_t *im)
2070 {
2071 long i;
2072 int res=0;
2073 double X0,Y0; /* points for filled graph and more*/
2074 gfx_node_t *node;
2076 /* draw 3d border */
2077 node = gfx_new_area (im->canvas, 0,im->yimg,
2078 2,im->yimg-2,
2079 2,2,im->graph_col[GRC_SHADEA]);
2080 gfx_add_point( node , im->ximg - 2, 2 );
2081 gfx_add_point( node , im->ximg, 0 );
2082 gfx_add_point( node , 0,0 );
2083 /* gfx_add_point( node , 0,im->yimg ); */
2085 node = gfx_new_area (im->canvas, 2,im->yimg-2,
2086 im->ximg-2,im->yimg-2,
2087 im->ximg - 2, 2,
2088 im->graph_col[GRC_SHADEB]);
2089 gfx_add_point( node , im->ximg,0);
2090 gfx_add_point( node , im->ximg,im->yimg);
2091 gfx_add_point( node , 0,im->yimg);
2092 /* gfx_add_point( node , 0,im->yimg ); */
2095 if (im->draw_x_grid == 1 )
2096 vertical_grid(im);
2098 if (im->draw_y_grid == 1){
2099 if(im->logarithmic){
2100 res = horizontal_log_grid(im);
2101 } else {
2102 res = draw_horizontal_grid(im);
2103 }
2105 /* dont draw horizontal grid if there is no min and max val */
2106 if (! res ) {
2107 char *nodata = "No Data found";
2108 gfx_new_text(im->canvas,im->ximg/2, (2*im->yorigin-im->ysize) / 2,
2109 im->graph_col[GRC_FONT],
2110 im->text_prop[TEXT_PROP_AXIS].font,
2111 im->text_prop[TEXT_PROP_AXIS].size,
2112 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_CENTER,
2113 nodata );
2114 }
2115 }
2117 /* yaxis unit description */
2118 gfx_new_text( im->canvas,
2119 10, (im->yorigin - im->ysize/2),
2120 im->graph_col[GRC_FONT],
2121 im->text_prop[TEXT_PROP_UNIT].font,
2122 im->text_prop[TEXT_PROP_UNIT].size, im->tabwidth,
2123 RRDGRAPH_YLEGEND_ANGLE,
2124 GFX_H_LEFT, GFX_V_CENTER,
2125 im->ylegend);
2127 /* graph title */
2128 gfx_new_text( im->canvas,
2129 im->ximg/2, im->text_prop[TEXT_PROP_TITLE].size*1.3+4,
2130 im->graph_col[GRC_FONT],
2131 im->text_prop[TEXT_PROP_TITLE].font,
2132 im->text_prop[TEXT_PROP_TITLE].size, im->tabwidth, 0.0,
2133 GFX_H_CENTER, GFX_V_CENTER,
2134 im->title);
2135 /* rrdtool 'logo' */
2136 gfx_new_text( im->canvas,
2137 im->ximg-7, 7,
2138 ( im->graph_col[GRC_FONT] & 0xffffff00 ) | 0x00000044,
2139 im->text_prop[TEXT_PROP_AXIS].font,
2140 5.5, im->tabwidth, 270,
2141 GFX_H_RIGHT, GFX_V_TOP,
2142 "RRDTOOL / TOBI OETIKER");
2144 /* graph watermark */
2145 if(im->watermark[0] != '\0') {
2146 gfx_new_text( im->canvas,
2147 im->ximg/2, im->yimg-6,
2148 ( im->graph_col[GRC_FONT] & 0xffffff00 ) | 0x00000044,
2149 im->text_prop[TEXT_PROP_AXIS].font,
2150 5.5, im->tabwidth, 0,
2151 GFX_H_CENTER, GFX_V_BOTTOM,
2152 im->watermark);
2153 }
2155 /* graph labels */
2156 if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
2157 for(i=0;i<im->gdes_c;i++){
2158 if(im->gdes[i].legend[0] =='\0')
2159 continue;
2161 /* im->gdes[i].leg_y is the bottom of the legend */
2162 X0 = im->gdes[i].leg_x;
2163 Y0 = im->gdes[i].leg_y;
2164 gfx_new_text ( im->canvas, X0, Y0,
2165 im->graph_col[GRC_FONT],
2166 im->text_prop[TEXT_PROP_LEGEND].font,
2167 im->text_prop[TEXT_PROP_LEGEND].size,
2168 im->tabwidth,0.0, GFX_H_LEFT, GFX_V_BOTTOM,
2169 im->gdes[i].legend );
2170 /* The legend for GRAPH items starts with "M " to have
2171 enough space for the box */
2172 if ( im->gdes[i].gf != GF_PRINT &&
2173 im->gdes[i].gf != GF_GPRINT &&
2174 im->gdes[i].gf != GF_COMMENT) {
2175 int boxH, boxV;
2177 boxH = gfx_get_text_width(im->canvas, 0,
2178 im->text_prop[TEXT_PROP_LEGEND].font,
2179 im->text_prop[TEXT_PROP_LEGEND].size,
2180 im->tabwidth,"o", 0) * 1.2;
2181 boxV = boxH*1.1;
2183 /* make sure transparent colors show up the same way as in the graph */
2184 node = gfx_new_area(im->canvas,
2185 X0,Y0-boxV,
2186 X0,Y0,
2187 X0+boxH,Y0,
2188 im->graph_col[GRC_BACK]);
2189 gfx_add_point ( node, X0+boxH, Y0-boxV );
2191 node = gfx_new_area(im->canvas,
2192 X0,Y0-boxV,
2193 X0,Y0,
2194 X0+boxH,Y0,
2195 im->gdes[i].col);
2196 gfx_add_point ( node, X0+boxH, Y0-boxV );
2197 node = gfx_new_line(im->canvas,
2198 X0,Y0-boxV,
2199 X0,Y0,
2200 1.0,im->graph_col[GRC_FRAME]);
2201 gfx_add_point(node,X0+boxH,Y0);
2202 gfx_add_point(node,X0+boxH,Y0-boxV);
2203 gfx_close_path(node);
2204 }
2205 }
2206 }
2207 }
2210 /*****************************************************
2211 * lazy check make sure we rely need to create this graph
2212 *****************************************************/
2214 int lazy_check(image_desc_t *im){
2215 FILE *fd = NULL;
2216 int size = 1;
2217 struct stat imgstat;
2219 if (im->lazy == 0) return 0; /* no lazy option */
2220 if (stat(im->graphfile,&imgstat) != 0)
2221 return 0; /* can't stat */
2222 /* one pixel in the existing graph is more then what we would
2223 change here ... */
2224 if (time(NULL) - imgstat.st_mtime >
2225 (im->end - im->start) / im->xsize)
2226 return 0;
2227 if ((fd = fopen(im->graphfile,"rb")) == NULL)
2228 return 0; /* the file does not exist */
2229 switch (im->canvas->imgformat) {
2230 case IF_PNG:
2231 size = PngSize(fd,&(im->ximg),&(im->yimg));
2232 break;
2233 default:
2234 size = 1;
2235 }
2236 fclose(fd);
2237 return size;
2238 }
2240 #ifdef WITH_PIECHART
2241 void
2242 pie_part(image_desc_t *im, gfx_color_t color,
2243 double PieCenterX, double PieCenterY, double Radius,
2244 double startangle, double endangle)
2245 {
2246 gfx_node_t *node;
2247 double angle;
2248 double step=M_PI/50; /* Number of iterations for the circle;
2249 ** 10 is definitely too low, more than
2250 ** 50 seems to be overkill
2251 */
2253 /* Strange but true: we have to work clockwise or else
2254 ** anti aliasing nor transparency don't work.
2255 **
2256 ** This test is here to make sure we do it right, also
2257 ** this makes the for...next loop more easy to implement.
2258 ** The return will occur if the user enters a negative number
2259 ** (which shouldn't be done according to the specs) or if the
2260 ** programmers do something wrong (which, as we all know, never
2261 ** happens anyway :)
2262 */
2263 if (endangle<startangle) return;
2265 /* Hidden feature: Radius decreases each full circle */
2266 angle=startangle;
2267 while (angle>=2*M_PI) {
2268 angle -= 2*M_PI;
2269 Radius *= 0.8;
2270 }
2272 node=gfx_new_area(im->canvas,
2273 PieCenterX+sin(startangle)*Radius,
2274 PieCenterY-cos(startangle)*Radius,
2275 PieCenterX,
2276 PieCenterY,
2277 PieCenterX+sin(endangle)*Radius,
2278 PieCenterY-cos(endangle)*Radius,
2279 color);
2280 for (angle=endangle;angle-startangle>=step;angle-=step) {
2281 gfx_add_point(node,
2282 PieCenterX+sin(angle)*Radius,
2283 PieCenterY-cos(angle)*Radius );
2284 }
2285 }
2287 #endif
2289 int
2290 graph_size_location(image_desc_t *im, int elements
2292 #ifdef WITH_PIECHART
2293 , int piechart
2294 #endif
2296 )
2297 {
2298 /* The actual size of the image to draw is determined from
2299 ** several sources. The size given on the command line is
2300 ** the graph area but we need more as we have to draw labels
2301 ** and other things outside the graph area
2302 */
2304 /* +-+-------------------------------------------+
2305 ** |l|.................title.....................|
2306 ** |e+--+-------------------------------+--------+
2307 ** |b| b| | |
2308 ** |a| a| | pie |
2309 ** |l| l| main graph area | chart |
2310 ** |.| .| | area |
2311 ** |t| y| | |
2312 ** |r+--+-------------------------------+--------+
2313 ** |e| | x-axis labels | |
2314 ** |v+--+-------------------------------+--------+
2315 ** | |..............legends......................|
2316 ** +-+-------------------------------------------+
2317 ** | watermark |
2318 ** +---------------------------------------------+
2319 */
2320 int Xvertical=0,
2321 Ytitle =0,
2322 Xylabel =0,
2323 Xmain =0, Ymain =0,
2324 #ifdef WITH_PIECHART
2325 Xpie =0, Ypie =0,
2326 #endif
2327 Yxlabel =0,
2328 #if 0
2329 Xlegend =0, Ylegend =0,
2330 #endif
2331 Xspacing =15, Yspacing =15,
2333 Ywatermark =4;
2335 if (im->extra_flags & ONLY_GRAPH) {
2336 im->xorigin =0;
2337 im->ximg = im->xsize;
2338 im->yimg = im->ysize;
2339 im->yorigin = im->ysize;
2340 ytr(im,DNAN);
2341 return 0;
2342 }
2344 if (im->ylegend[0] != '\0' ) {
2345 Xvertical = im->text_prop[TEXT_PROP_UNIT].size *2;
2346 }
2349 if (im->title[0] != '\0') {
2350 /* The title is placed "inbetween" two text lines so it
2351 ** automatically has some vertical spacing. The horizontal
2352 ** spacing is added here, on each side.
2353 */
2354 /* don't care for the with of the title
2355 Xtitle = gfx_get_text_width(im->canvas, 0,
2356 im->text_prop[TEXT_PROP_TITLE].font,
2357 im->text_prop[TEXT_PROP_TITLE].size,
2358 im->tabwidth,
2359 im->title, 0) + 2*Xspacing; */
2360 Ytitle = im->text_prop[TEXT_PROP_TITLE].size*2.6+10;
2361 }
2363 if (elements) {
2364 Xmain=im->xsize;
2365 Ymain=im->ysize;
2366 if (im->draw_x_grid) {
2367 Yxlabel=im->text_prop[TEXT_PROP_AXIS].size *2.5;
2368 }
2369 if (im->draw_y_grid) {
2370 Xylabel=gfx_get_text_width(im->canvas, 0,
2371 im->text_prop[TEXT_PROP_AXIS].font,
2372 im->text_prop[TEXT_PROP_AXIS].size,
2373 im->tabwidth,
2374 "0", 0) * im->unitslength;
2375 }
2376 }
2378 #ifdef WITH_PIECHART
2379 if (piechart) {
2380 im->piesize=im->xsize<im->ysize?im->xsize:im->ysize;
2381 Xpie=im->piesize;
2382 Ypie=im->piesize;
2383 }
2384 #endif
2386 /* Now calculate the total size. Insert some spacing where
2387 desired. im->xorigin and im->yorigin need to correspond
2388 with the lower left corner of the main graph area or, if
2389 this one is not set, the imaginary box surrounding the
2390 pie chart area. */
2392 /* The legend width cannot yet be determined, as a result we
2393 ** have problems adjusting the image to it. For now, we just
2394 ** forget about it at all; the legend will have to fit in the
2395 ** size already allocated.
2396 */
2397 im->ximg = Xylabel + Xmain + 2 * Xspacing;
2399 #ifdef WITH_PIECHART
2400 im->ximg += Xpie;
2401 #endif
2403 if (Xmain) im->ximg += Xspacing;
2404 #ifdef WITH_PIECHART
2405 if (Xpie) im->ximg += Xspacing;
2406 #endif
2408 im->xorigin = Xspacing + Xylabel;
2410 /* the length of the title should not influence with width of the graph
2411 if (Xtitle > im->ximg) im->ximg = Xtitle; */
2413 if (Xvertical) { /* unit description */
2414 im->ximg += Xvertical;
2415 im->xorigin += Xvertical;
2416 }
2417 xtr(im,0);
2419 /* The vertical size is interesting... we need to compare
2420 ** the sum of {Ytitle, Ymain, Yxlabel, Ylegend, Ywatermark} with
2421 ** Yvertical however we need to know {Ytitle+Ymain+Yxlabel}
2422 ** in order to start even thinking about Ylegend or Ywatermark.
2423 **
2424 ** Do it in three portions: First calculate the inner part,
2425 ** then do the legend, then adjust the total height of the img,
2426 ** adding space for a watermark if one exists;
2427 */
2429 /* reserve space for main and/or pie */
2431 im->yimg = Ymain + Yxlabel;
2433 #ifdef WITH_PIECHART
2434 if (im->yimg < Ypie) im->yimg = Ypie;
2435 #endif
2437 im->yorigin = im->yimg - Yxlabel;
2439 /* reserve space for the title *or* some padding above the graph */
2440 if (Ytitle) {
2441 im->yimg += Ytitle;
2442 im->yorigin += Ytitle;
2443 } else {
2444 im->yimg += 1.5*Yspacing;
2445 im->yorigin += 1.5*Yspacing;
2446 }
2447 /* reserve space for padding below the graph */
2448 im->yimg += Yspacing;
2450 /* Determine where to place the legends onto the image.
2451 ** Adjust im->yimg to match the space requirements.
2452 */
2453 if(leg_place(im)==-1)
2454 return -1;
2456 if (im->watermark[0] != '\0') {
2457 im->yimg += Ywatermark;
2458 }
2460 #if 0
2461 if (Xlegend > im->ximg) {
2462 im->ximg = Xlegend;
2463 /* reposition Pie */
2464 }
2465 #endif
2467 #ifdef WITH_PIECHART
2468 /* The pie is placed in the upper right hand corner,
2469 ** just below the title (if any) and with sufficient
2470 ** padding.
2471 */
2472 if (elements) {
2473 im->pie_x = im->ximg - Xspacing - Xpie/2;
2474 im->pie_y = im->yorigin-Ymain+Ypie/2;
2475 } else {
2476 im->pie_x = im->ximg/2;
2477 im->pie_y = im->yorigin-Ypie/2;
2478 }
2479 #endif
2481 ytr(im,DNAN);
2482 return 0;
2483 }
2485 /* from http://www.cygnus-software.com/papers/comparingfloats/comparingfloats.htm */
2486 /* yes we are loosing precision by doing tos with floats instead of doubles
2487 but it seems more stable this way. */
2489 static int AlmostEqual2sComplement (float A, float B, int maxUlps)
2490 {
2492 int aInt = *(int*)&A;
2493 int bInt = *(int*)&B;
2494 int intDiff;
2495 /* Make sure maxUlps is non-negative and small enough that the
2496 default NAN won't compare as equal to anything. */
2498 /* assert(maxUlps > 0 && maxUlps < 4 * 1024 * 1024); */
2500 /* Make aInt lexicographically ordered as a twos-complement int */
2502 if (aInt < 0)
2503 aInt = 0x80000000l - aInt;
2505 /* Make bInt lexicographically ordered as a twos-complement int */
2507 if (bInt < 0)
2508 bInt = 0x80000000l - bInt;
2510 intDiff = abs(aInt - bInt);
2512 if (intDiff <= maxUlps)
2513 return 1;
2515 return 0;
2516 }
2518 /* draw that picture thing ... */
2519 int
2520 graph_paint(image_desc_t *im, char ***calcpr)
2521 {
2522 int i,ii;
2523 int lazy = lazy_check(im);
2524 #ifdef WITH_PIECHART
2525 int piechart = 0;
2526 double PieStart=0.0;
2527 #endif
2528 FILE *fo;
2529 gfx_node_t *node;
2531 double areazero = 0.0;
2532 graph_desc_t *lastgdes = NULL;
2534 /* if we are lazy and there is nothing to PRINT ... quit now */
2535 if (lazy && im->prt_c==0) return 0;
2537 /* pull the data from the rrd files ... */
2539 if(data_fetch(im)==-1)
2540 return -1;
2542 /* evaluate VDEF and CDEF operations ... */
2543 if(data_calc(im)==-1)
2544 return -1;
2546 #ifdef WITH_PIECHART
2547 /* check if we need to draw a piechart */
2548 for(i=0;i<im->gdes_c;i++){
2549 if (im->gdes[i].gf == GF_PART) {
2550 piechart=1;
2551 break;
2552 }
2553 }
2554 #endif
2556 /* calculate and PRINT and GPRINT definitions. We have to do it at
2557 * this point because it will affect the length of the legends
2558 * if there are no graph elements we stop here ...
2559 * if we are lazy, try to quit ...
2560 */
2561 i=print_calc(im,calcpr);
2562 if(i<0) return -1;
2563 if(((i==0)
2564 #ifdef WITH_PIECHART
2565 &&(piechart==0)
2566 #endif
2567 ) || lazy) return 0;
2569 #ifdef WITH_PIECHART
2570 /* If there's only the pie chart to draw, signal this */
2571 if (i==0) piechart=2;
2572 #endif
2574 /* get actual drawing data and find min and max values*/
2575 if(data_proc(im)==-1)
2576 return -1;
2578 if(!im->logarithmic){si_unit(im);} /* identify si magnitude Kilo, Mega Giga ? */
2580 if(!im->rigid && ! im->logarithmic)
2581 expand_range(im); /* make sure the upper and lower limit are
2582 sensible values */
2584 if (!calc_horizontal_grid(im))
2585 return -1;
2587 if (im->gridfit)
2588 apply_gridfit(im);
2591 /**************************************************************
2592 *** Calculating sizes and locations became a bit confusing ***
2593 *** so I moved this into a separate function. ***
2594 **************************************************************/
2595 if(graph_size_location(im,i
2596 #ifdef WITH_PIECHART
2597 ,piechart
2598 #endif
2599 )==-1)
2600 return -1;
2602 /* the actual graph is created by going through the individual
2603 graph elements and then drawing them */
2605 node=gfx_new_area ( im->canvas,
2606 0, 0,
2607 0, im->yimg,
2608 im->ximg, im->yimg,
2609 im->graph_col[GRC_BACK]);
2611 gfx_add_point(node,im->ximg, 0);
2613 #ifdef WITH_PIECHART
2614 if (piechart != 2) {
2615 #endif
2616 node=gfx_new_area ( im->canvas,
2617 im->xorigin, im->yorigin,
2618 im->xorigin + im->xsize, im->yorigin,
2619 im->xorigin + im->xsize, im->yorigin-im->ysize,
2620 im->graph_col[GRC_CANVAS]);
2622 gfx_add_point(node,im->xorigin, im->yorigin - im->ysize);
2624 if (im->minval > 0.0)
2625 areazero = im->minval;
2626 if (im->maxval < 0.0)
2627 areazero = im->maxval;
2628 #ifdef WITH_PIECHART
2629 }
2630 #endif
2632 #ifdef WITH_PIECHART
2633 if (piechart) {
2634 pie_part(im,im->graph_col[GRC_CANVAS],im->pie_x,im->pie_y,im->piesize*0.5,0,2*M_PI);
2635 }
2636 #endif
2638 for(i=0;i<im->gdes_c;i++){
2639 switch(im->gdes[i].gf){
2640 case GF_CDEF:
2641 case GF_VDEF:
2642 case GF_DEF:
2643 case GF_PRINT:
2644 case GF_GPRINT:
2645 case GF_COMMENT:
2646 case GF_HRULE:
2647 case GF_VRULE:
2648 case GF_XPORT:
2649 case GF_SHIFT:
2650 break;
2651 case GF_TICK:
2652 for (ii = 0; ii < im->xsize; ii++)
2653 {
2654 if (!isnan(im->gdes[i].p_data[ii]) &&
2655 im->gdes[i].p_data[ii] != 0.0)
2656 {
2657 if (im -> gdes[i].yrule > 0 ) {
2658 gfx_new_line(im->canvas,
2659 im -> xorigin + ii, im->yorigin,
2660 im -> xorigin + ii, im->yorigin - im -> gdes[i].yrule * im -> ysize,
2661 1.0,
2662 im -> gdes[i].col );
2663 } else if ( im -> gdes[i].yrule < 0 ) {
2664 gfx_new_line(im->canvas,
2665 im -> xorigin + ii, im->yorigin - im -> ysize,
2666 im -> xorigin + ii, im->yorigin - ( 1 - im -> gdes[i].yrule ) * im -> ysize,
2667 1.0,
2668 im -> gdes[i].col );
2670 }
2671 }
2672 }
2673 break;
2674 case GF_LINE:
2675 case GF_AREA:
2676 /* fix data points at oo and -oo */
2677 for(ii=0;ii<im->xsize;ii++){
2678 if (isinf(im->gdes[i].p_data[ii])){
2679 if (im->gdes[i].p_data[ii] > 0) {
2680 im->gdes[i].p_data[ii] = im->maxval ;
2681 } else {
2682 im->gdes[i].p_data[ii] = im->minval ;
2683 }
2685 }
2686 } /* for */
2688 /* *******************************************************
2689 a ___. (a,t)
2690 | | ___
2691 ____| | | |
2692 | |___|
2693 -------|--t-1--t--------------------------------
2695 if we know the value at time t was a then
2696 we draw a square from t-1 to t with the value a.
2698 ********************************************************* */
2699 if (im->gdes[i].col != 0x0){
2700 /* GF_LINE and friend */
2701 if(im->gdes[i].gf == GF_LINE ){
2702 double last_y=0.0;
2703 node = NULL;
2704 for(ii=1;ii<im->xsize;ii++){
2705 if (isnan(im->gdes[i].p_data[ii]) || (im->slopemode==1 && isnan(im->gdes[i].p_data[ii-1]))){
2706 node = NULL;
2707 continue;
2708 }
2709 if ( node == NULL ) {
2710 last_y = ytr(im,im->gdes[i].p_data[ii]);
2711 if ( im->slopemode == 0 ){
2712 node = gfx_new_line(im->canvas,
2713 ii-1+im->xorigin,last_y,
2714 ii+im->xorigin,last_y,
2715 im->gdes[i].linewidth,
2716 im->gdes[i].col);
2717 } else {
2718 node = gfx_new_line(im->canvas,
2719 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii-1]),
2720 ii+im->xorigin,last_y,
2721 im->gdes[i].linewidth,
2722 im->gdes[i].col);
2723 }
2724 } else {
2725 double new_y = ytr(im,im->gdes[i].p_data[ii]);
2726 if ( im->slopemode==0 && ! AlmostEqual2sComplement(new_y,last_y,4)){
2727 gfx_add_point(node,ii-1+im->xorigin,new_y);
2728 };
2729 last_y = new_y;
2730 gfx_add_point(node,ii+im->xorigin,new_y);
2731 };
2733 }
2734 } else {
2735 int idxI=-1;
2736 double *foreY=malloc(sizeof(double)*im->xsize*2);
2737 double *foreX=malloc(sizeof(double)*im->xsize*2);
2738 double *backY=malloc(sizeof(double)*im->xsize*2);
2739 double *backX=malloc(sizeof(double)*im->xsize*2);
2740 int drawem = 0;
2741 for(ii=0;ii<=im->xsize;ii++){
2742 double ybase,ytop;
2743 if ( idxI > 0 && ( drawem != 0 || ii==im->xsize)){
2744 int cntI=1;
2745 int lastI=0;
2746 while (cntI < idxI && AlmostEqual2sComplement(foreY[lastI],foreY[cntI],4) && AlmostEqual2sComplement(foreY[lastI],foreY[cntI+1],4)){cntI++;}
2747 node = gfx_new_area(im->canvas,
2748 backX[0],backY[0],
2749 foreX[0],foreY[0],
2750 foreX[cntI],foreY[cntI], im->gdes[i].col);
2751 while (cntI < idxI) {
2752 lastI = cntI;
2753 cntI++;
2754 while ( cntI < idxI && AlmostEqual2sComplement(foreY[lastI],foreY[cntI],4) && AlmostEqual2sComplement(foreY[lastI],foreY[cntI+1],4)){cntI++;}
2755 gfx_add_point(node,foreX[cntI],foreY[cntI]);
2756 }
2757 gfx_add_point(node,backX[idxI],backY[idxI]);
2758 while (idxI > 1){
2759 lastI = idxI;
2760 idxI--;
2761 while ( idxI > 1 && AlmostEqual2sComplement(backY[lastI], backY[idxI],4) && AlmostEqual2sComplement(backY[lastI],backY[idxI-1],4)){idxI--;}
2762 gfx_add_point(node,backX[idxI],backY[idxI]);
2763 }
2764 idxI=-1;
2765 drawem = 0;
2766 }
2767 if (drawem != 0){
2768 drawem = 0;
2769 idxI=-1;
2770 }
2771 if (ii == im->xsize) break;
2773 /* keep things simple for now, just draw these bars
2774 do not try to build a big and complex area */
2777 if ( im->slopemode == 0 && ii==0){
2778 continue;
2779 }
2780 if ( isnan(im->gdes[i].p_data[ii]) ) {
2781 drawem = 1;
2782 continue;
2783 }
2784 ytop = ytr(im,im->gdes[i].p_data[ii]);
2785 if ( lastgdes && im->gdes[i].stack ) {
2786 ybase = ytr(im,lastgdes->p_data[ii]);
2787 } else {
2788 ybase = ytr(im,areazero);
2789 }
2790 if ( ybase == ytop ){
2791 drawem = 1;
2792 continue;
2793 }
2794 /* every area has to be wound clock-wise,
2795 so we have to make sur base remains base */
2796 if (ybase > ytop){
2797 double extra = ytop;
2798 ytop = ybase;
2799 ybase = extra;
2800 }
2801 if ( im->slopemode == 0 ){
2802 backY[++idxI] = ybase-0.2;
2803 backX[idxI] = ii+im->xorigin-1;
2804 foreY[idxI] = ytop+0.2;
2805 foreX[idxI] = ii+im->xorigin-1;
2806 }
2807 backY[++idxI] = ybase-0.2;
2808 backX[idxI] = ii+im->xorigin;
2809 foreY[idxI] = ytop+0.2;
2810 foreX[idxI] = ii+im->xorigin;
2811 }
2812 /* close up any remaining area */
2813 free(foreY);
2814 free(foreX);
2815 free(backY);
2816 free(backX);
2817 } /* else GF_LINE */
2818 } /* if color != 0x0 */
2819 /* make sure we do not run into trouble when stacking on NaN */
2820 for(ii=0;ii<im->xsize;ii++){
2821 if (isnan(im->gdes[i].p_data[ii])) {
2822 if (lastgdes && (im->gdes[i].stack)) {
2823 im->gdes[i].p_data[ii] = lastgdes->p_data[ii];
2824 } else {
2825 im->gdes[i].p_data[ii] = areazero;
2826 }
2827 }
2828 }
2829 lastgdes = &(im->gdes[i]);
2830 break;
2831 #ifdef WITH_PIECHART
2832 case GF_PART:
2833 if(isnan(im->gdes[i].yrule)) /* fetch variable */
2834 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2836 if (finite(im->gdes[i].yrule)) { /* even the fetched var can be NaN */
2837 pie_part(im,im->gdes[i].col,
2838 im->pie_x,im->pie_y,im->piesize*0.4,
2839 M_PI*2.0*PieStart/100.0,
2840 M_PI*2.0*(PieStart+im->gdes[i].yrule)/100.0);
2841 PieStart += im->gdes[i].yrule;
2842 }
2843 break;
2844 #endif
2845 case GF_STACK:
2846 rrd_set_error("STACK should already be turned into LINE or AREA here");
2847 return -1;
2848 break;
2850 } /* switch */
2851 }
2852 #ifdef WITH_PIECHART
2853 if (piechart==2) {
2854 im->draw_x_grid=0;
2855 im->draw_y_grid=0;
2856 }
2857 #endif
2860 /* grid_paint also does the text */
2861 if( !(im->extra_flags & ONLY_GRAPH) )
2862 grid_paint(im);
2865 if( !(im->extra_flags & ONLY_GRAPH) )
2866 axis_paint(im);
2868 /* the RULES are the last thing to paint ... */
2869 for(i=0;i<im->gdes_c;i++){
2871 switch(im->gdes[i].gf){
2872 case GF_HRULE:
2873 if(im->gdes[i].yrule >= im->minval
2874 && im->gdes[i].yrule <= im->maxval)
2875 gfx_new_line(im->canvas,
2876 im->xorigin,ytr(im,im->gdes[i].yrule),
2877 im->xorigin+im->xsize,ytr(im,im->gdes[i].yrule),
2878 1.0,im->gdes[i].col);
2879 break;
2880 case GF_VRULE:
2881 if(im->gdes[i].xrule >= im->start
2882 && im->gdes[i].xrule <= im->end)
2883 gfx_new_line(im->canvas,
2884 xtr(im,im->gdes[i].xrule),im->yorigin,
2885 xtr(im,im->gdes[i].xrule),im->yorigin-im->ysize,
2886 1.0,im->gdes[i].col);
2887 break;
2888 default:
2889 break;
2890 }
2891 }
2894 if (strcmp(im->graphfile,"-")==0) {
2895 fo = im->graphhandle ? im->graphhandle : stdout;
2896 #if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
2897 /* Change translation mode for stdout to BINARY */
2898 _setmode( _fileno( fo ), O_BINARY );
2899 #endif
2900 } else {
2901 if ((fo = fopen(im->graphfile,"wb")) == NULL) {
2902 rrd_set_error("Opening '%s' for write: %s",im->graphfile,
2903 rrd_strerror(errno));
2904 return (-1);
2905 }
2906 }
2907 gfx_render (im->canvas,im->ximg,im->yimg,0x00000000,fo);
2908 if (strcmp(im->graphfile,"-") != 0)
2909 fclose(fo);
2910 return 0;
2911 }
2914 /*****************************************************
2915 * graph stuff
2916 *****************************************************/
2918 int
2919 gdes_alloc(image_desc_t *im){
2921 im->gdes_c++;
2922 if ((im->gdes = (graph_desc_t *) rrd_realloc(im->gdes, (im->gdes_c)
2923 * sizeof(graph_desc_t)))==NULL){
2924 rrd_set_error("realloc graph_descs");
2925 return -1;
2926 }
2929 im->gdes[im->gdes_c-1].step=im->step;
2930 im->gdes[im->gdes_c-1].step_orig=im->step;
2931 im->gdes[im->gdes_c-1].stack=0;
2932 im->gdes[im->gdes_c-1].linewidth=0;
2933 im->gdes[im->gdes_c-1].debug=0;
2934 im->gdes[im->gdes_c-1].start=im->start;
2935 im->gdes[im->gdes_c-1].start_orig=im->start;
2936 im->gdes[im->gdes_c-1].end=im->end;
2937 im->gdes[im->gdes_c-1].end_orig=im->end;
2938 im->gdes[im->gdes_c-1].vname[0]='\0';
2939 im->gdes[im->gdes_c-1].data=NULL;
2940 im->gdes[im->gdes_c-1].ds_namv=NULL;
2941 im->gdes[im->gdes_c-1].data_first=0;
2942 im->gdes[im->gdes_c-1].p_data=NULL;
2943 im->gdes[im->gdes_c-1].rpnp=NULL;
2944 im->gdes[im->gdes_c-1].shift=0;
2945 im->gdes[im->gdes_c-1].col = 0x0;
2946 im->gdes[im->gdes_c-1].legend[0]='\0';
2947 im->gdes[im->gdes_c-1].format[0]='\0';
2948 im->gdes[im->gdes_c-1].strftm=0;
2949 im->gdes[im->gdes_c-1].rrd[0]='\0';
2950 im->gdes[im->gdes_c-1].ds=-1;
2951 im->gdes[im->gdes_c-1].cf_reduce=CF_AVERAGE;
2952 im->gdes[im->gdes_c-1].cf=CF_AVERAGE;
2953 im->gdes[im->gdes_c-1].p_data=NULL;
2954 im->gdes[im->gdes_c-1].yrule=DNAN;
2955 im->gdes[im->gdes_c-1].xrule=0;
2956 return 0;
2957 }
2959 /* copies input untill the first unescaped colon is found
2960 or until input ends. backslashes have to be escaped as well */
2961 int
2962 scan_for_col(const char *const input, int len, char *const output)
2963 {
2964 int inp,outp=0;
2965 for (inp=0;
2966 inp < len &&
2967 input[inp] != ':' &&
2968 input[inp] != '\0';
2969 inp++){
2970 if (input[inp] == '\\' &&
2971 input[inp+1] != '\0' &&
2972 (input[inp+1] == '\\' ||
2973 input[inp+1] == ':')){
2974 output[outp++] = input[++inp];
2975 }
2976 else {
2977 output[outp++] = input[inp];
2978 }
2979 }
2980 output[outp] = '\0';
2981 return inp;
2982 }
2983 /* Some surgery done on this function, it became ridiculously big.
2984 ** Things moved:
2985 ** - initializing now in rrd_graph_init()
2986 ** - options parsing now in rrd_graph_options()
2987 ** - script parsing now in rrd_graph_script()
2988 */
2989 int
2990 rrd_graph(int argc, char **argv, char ***prdata, int *xsize, int *ysize, FILE *stream, double *ymin, double *ymax)
2991 {
2992 image_desc_t im;
2993 rrd_graph_init(&im);
2994 im.graphhandle = stream;
2996 rrd_graph_options(argc,argv,&im);
2997 if (rrd_test_error()) {
2998 im_free(&im);
2999 return -1;
3000 }
3002 if (strlen(argv[optind])>=MAXPATH) {
3003 rrd_set_error("filename (including path) too long");
3004 im_free(&im);
3005 return -1;
3006 }
3007 strncpy(im.graphfile,argv[optind],MAXPATH-1);
3008 im.graphfile[MAXPATH-1]='\0';
3010 rrd_graph_script(argc,argv,&im,1);
3011 if (rrd_test_error()) {
3012 im_free(&im);
3013 return -1;
3014 }
3016 /* Everything is now read and the actual work can start */
3018 (*prdata)=NULL;
3019 if (graph_paint(&im,prdata)==-1){
3020 im_free(&im);
3021 return -1;
3022 }
3024 /* The image is generated and needs to be output.
3025 ** Also, if needed, print a line with information about the image.
3026 */
3028 *xsize=im.ximg;
3029 *ysize=im.yimg;
3030 *ymin=im.minval;
3031 *ymax=im.maxval;
3032 if (im.imginfo) {
3033 char *filename;
3034 if (!(*prdata)) {
3035 /* maybe prdata is not allocated yet ... lets do it now */
3036 if ((*prdata = calloc(2,sizeof(char *)))==NULL) {
3037 rrd_set_error("malloc imginfo");
3038 return -1;
3039 };
3040 }
3041 if(((*prdata)[0] = malloc((strlen(im.imginfo)+200+strlen(im.graphfile))*sizeof(char)))
3042 ==NULL){
3043 rrd_set_error("malloc imginfo");
3044 return -1;
3045 }
3046 filename=im.graphfile+strlen(im.graphfile);
3047 while(filename > im.graphfile) {
3048 if (*(filename-1)=='/' || *(filename-1)=='\\' ) break;
3049 filename--;
3050 }
3052 sprintf((*prdata)[0],im.imginfo,filename,(long)(im.canvas->zoom*im.ximg),(long)(im.canvas->zoom*im.yimg));
3053 }
3054 im_free(&im);
3055 return 0;
3056 }
3058 void
3059 rrd_graph_init(image_desc_t *im)
3060 {
3061 unsigned int i;
3063 #ifdef HAVE_TZSET
3064 tzset();
3065 #endif
3066 #ifdef HAVE_SETLOCALE
3067 setlocale(LC_TIME,"");
3068 #ifdef HAVE_MBSTOWCS
3069 setlocale(LC_CTYPE,"");
3070 #endif
3071 #endif
3072 im->yorigin=0;
3073 im->xorigin=0;
3074 im->minval=0;
3075 im->xlab_user.minsec = -1;
3076 im->ximg=0;
3077 im->yimg=0;
3078 im->xsize = 400;
3079 im->ysize = 100;
3080 im->step = 0;
3081 im->ylegend[0] = '\0';
3082 im->title[0] = '\0';
3083 im->watermark[0] = '\0';
3084 im->minval = DNAN;
3085 im->maxval = DNAN;
3086 im->unitsexponent= 9999;
3087 im->unitslength= 6;
3088 im->symbol = ' ';
3089 im->viewfactor = 1.0;
3090 im->extra_flags= 0;
3091 im->rigid = 0;
3092 im->gridfit = 1;
3093 im->imginfo = NULL;
3094 im->lazy = 0;
3095 im->slopemode = 0;
3096 im->logarithmic = 0;
3097 im->ygridstep = DNAN;
3098 im->draw_x_grid = 1;
3099 im->draw_y_grid = 1;
3100 im->base = 1000;
3101 im->prt_c = 0;
3102 im->gdes_c = 0;
3103 im->gdes = NULL;
3104 im->canvas = gfx_new_canvas();
3105 im->grid_dash_on = 1;
3106 im->grid_dash_off = 1;
3107 im->tabwidth = 40.0;
3109 for(i=0;i<DIM(graph_col);i++)
3110 im->graph_col[i]=graph_col[i];
3112 #if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
3113 {
3114 char *windir;
3115 char rrd_win_default_font[1000];
3116 windir = getenv("windir");
3117 /* %windir% is something like D:\windows or C:\winnt */
3118 if (windir != NULL) {
3119 strncpy(rrd_win_default_font,windir,500);
3120 rrd_win_default_font[500] = '\0';
3121 strcat(rrd_win_default_font,"\\fonts\\");
3122 strcat(rrd_win_default_font,RRD_DEFAULT_FONT);
3123 for(i=0;i<DIM(text_prop);i++){
3124 strncpy(text_prop[i].font,rrd_win_default_font,sizeof(text_prop[i].font)-1);
3125 text_prop[i].font[sizeof(text_prop[i].font)-1] = '\0';
3126 }
3127 }
3128 }
3129 #endif
3130 {
3131 char *deffont;
3132 deffont = getenv("RRD_DEFAULT_FONT");
3133 if (deffont != NULL) {
3134 for(i=0;i<DIM(text_prop);i++){
3135 strncpy(text_prop[i].font,deffont,sizeof(text_prop[i].font)-1);
3136 text_prop[i].font[sizeof(text_prop[i].font)-1] = '\0';
3137 }
3138 }
3139 }
3140 for(i=0;i<DIM(text_prop);i++){
3141 im->text_prop[i].size = text_prop[i].size;
3142 strcpy(im->text_prop[i].font,text_prop[i].font);
3143 }
3144 }
3146 void
3147 rrd_graph_options(int argc, char *argv[],image_desc_t *im)
3148 {
3149 int stroff;
3150 char *parsetime_error = NULL;
3151 char scan_gtm[12],scan_mtm[12],scan_ltm[12],col_nam[12];
3152 time_t start_tmp=0,end_tmp=0;
3153 long long_tmp;
3154 struct rrd_time_value start_tv, end_tv;
3155 gfx_color_t color;
3156 optind = 0; opterr = 0; /* initialize getopt */
3158 parsetime("end-24h", &start_tv);
3159 parsetime("now", &end_tv);
3161 /* defines for long options without a short equivalent. should be bytes,
3162 and may not collide with (the ASCII value of) short options */
3163 #define LONGOPT_UNITS_SI 255
3165 while (1){
3166 static struct option long_options[] =
3167 {
3168 {"start", required_argument, 0, 's'},
3169 {"end", required_argument, 0, 'e'},
3170 {"x-grid", required_argument, 0, 'x'},
3171 {"y-grid", required_argument, 0, 'y'},
3172 {"vertical-label",required_argument,0,'v'},
3173 {"width", required_argument, 0, 'w'},
3174 {"height", required_argument, 0, 'h'},
3175 {"interlaced", no_argument, 0, 'i'},
3176 {"upper-limit",required_argument, 0, 'u'},
3177 {"lower-limit",required_argument, 0, 'l'},
3178 {"rigid", no_argument, 0, 'r'},
3179 {"base", required_argument, 0, 'b'},
3180 {"logarithmic",no_argument, 0, 'o'},
3181 {"color", required_argument, 0, 'c'},
3182 {"font", required_argument, 0, 'n'},
3183 {"title", required_argument, 0, 't'},
3184 {"imginfo", required_argument, 0, 'f'},
3185 {"imgformat", required_argument, 0, 'a'},
3186 {"lazy", no_argument, 0, 'z'},
3187 {"zoom", required_argument, 0, 'm'},
3188 {"no-legend", no_argument, 0, 'g'},
3189 {"force-rules-legend",no_argument,0, 'F'},
3190 {"only-graph", no_argument, 0, 'j'},
3191 {"alt-y-grid", no_argument, 0, 'Y'},
3192 {"no-minor", no_argument, 0, 'I'},
3193 {"slope-mode", no_argument, 0, 'E'},
3194 {"alt-autoscale", no_argument, 0, 'A'},
3195 {"alt-autoscale-max", no_argument, 0, 'M'},
3196 {"no-gridfit", no_argument, 0, 'N'},
3197 {"units-exponent",required_argument, 0, 'X'},
3198 {"units-length",required_argument, 0, 'L'},
3199 {"units", required_argument, 0, LONGOPT_UNITS_SI },
3200 {"step", required_argument, 0, 'S'},
3201 {"tabwidth", required_argument, 0, 'T'},
3202 {"font-render-mode", required_argument, 0, 'R'},
3203 {"font-smoothing-threshold", required_argument, 0, 'B'},
3204 {"watermark", required_argument, 0, 'W'},
3205 {"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 */
3206 {0,0,0,0}};
3207 int option_index = 0;
3208 int opt;
3209 int col_start,col_end;
3211 opt = getopt_long(argc, argv,
3212 "s:e:x:y:v:w:h:iu:l:rb:oc:n:m:t:f:a:I:zgjFYAMEX:L:S:T:NR:B:W:",
3213 long_options, &option_index);
3215 if (opt == EOF)
3216 break;
3218 switch(opt) {
3219 case 'I':
3220 im->extra_flags |= NOMINOR;
3221 break;
3222 case 'Y':
3223 im->extra_flags |= ALTYGRID;
3224 break;
3225 case 'A':
3226 im->extra_flags |= ALTAUTOSCALE;
3227 break;
3228 case 'M':
3229 im->extra_flags |= ALTAUTOSCALE_MAX;
3230 break;
3231 case 'j':
3232 im->extra_flags |= ONLY_GRAPH;
3233 break;
3234 case 'g':
3235 im->extra_flags |= NOLEGEND;
3236 break;
3237 case 'F':
3238 im->extra_flags |= FORCE_RULES_LEGEND;
3239 break;
3240 case LONGOPT_UNITS_SI:
3241 if(im->extra_flags & FORCE_UNITS) {
3242 rrd_set_error("--units can only be used once!");
3243 return;
3244 }
3245 if(strcmp(optarg,"si")==0)
3246 im->extra_flags |= FORCE_UNITS_SI;
3247 else {
3248 rrd_set_error("invalid argument for --units: %s", optarg );
3249 return;
3250 }
3251 break;
3252 case 'X':
3253 im->unitsexponent = atoi(optarg);
3254 break;
3255 case 'L':
3256 im->unitslength = atoi(optarg);
3257 break;
3258 case 'T':
3259 im->tabwidth = atof(optarg);
3260 break;
3261 case 'S':
3262 im->step = atoi(optarg);
3263 break;
3264 case 'N':
3265 im->gridfit = 0;
3266 break;
3267 case 's':
3268 if ((parsetime_error = parsetime(optarg, &start_tv))) {
3269 rrd_set_error( "start time: %s", parsetime_error );
3270 return;
3271 }
3272 break;
3273 case 'e':
3274 if ((parsetime_error = parsetime(optarg, &end_tv))) {
3275 rrd_set_error( "end time: %s", parsetime_error );
3276 return;
3277 }
3278 break;
3279 case 'x':
3280 if(strcmp(optarg,"none") == 0){
3281 im->draw_x_grid=0;
3282 break;
3283 };
3285 if(sscanf(optarg,
3286 "%10[A-Z]:%ld:%10[A-Z]:%ld:%10[A-Z]:%ld:%ld:%n",
3287 scan_gtm,
3288 &im->xlab_user.gridst,
3289 scan_mtm,
3290 &im->xlab_user.mgridst,
3291 scan_ltm,
3292 &im->xlab_user.labst,
3293 &im->xlab_user.precis,
3294 &stroff) == 7 && stroff != 0){
3295 strncpy(im->xlab_form, optarg+stroff, sizeof(im->xlab_form) - 1);
3296 im->xlab_form[sizeof(im->xlab_form)-1] = '\0';
3297 if((int)(im->xlab_user.gridtm = tmt_conv(scan_gtm)) == -1){
3298 rrd_set_error("unknown keyword %s",scan_gtm);
3299 return;
3300 } else if ((int)(im->xlab_user.mgridtm = tmt_conv(scan_mtm)) == -1){
3301 rrd_set_error("unknown keyword %s",scan_mtm);
3302 return;
3303 } else if ((int)(im->xlab_user.labtm = tmt_conv(scan_ltm)) == -1){
3304 rrd_set_error("unknown keyword %s",scan_ltm);
3305 return;
3306 }
3307 im->xlab_user.minsec = 1;
3308 im->xlab_user.stst = im->xlab_form;
3309 } else {
3310 rrd_set_error("invalid x-grid format");
3311 return;
3312 }
3313 break;
3314 case 'y':
3316 if(strcmp(optarg,"none") == 0){
3317 im->draw_y_grid=0;
3318 break;
3319 };
3321 if(sscanf(optarg,
3322 "%lf:%d",
3323 &im->ygridstep,
3324 &im->ylabfact) == 2) {
3325 if(im->ygridstep<=0){
3326 rrd_set_error("grid step must be > 0");
3327 return;
3328 } else if (im->ylabfact < 1){
3329 rrd_set_error("label factor must be > 0");
3330 return;
3331 }
3332 } else {
3333 rrd_set_error("invalid y-grid format");
3334 return;
3335 }
3336 break;
3337 case 'v':
3338 strncpy(im->ylegend,optarg,150);
3339 im->ylegend[150]='\0';
3340 break;
3341 case 'u':
3342 im->maxval = atof(optarg);
3343 break;
3344 case 'l':
3345 im->minval = atof(optarg);
3346 break;
3347 case 'b':
3348 im->base = atol(optarg);
3349 if(im->base != 1024 && im->base != 1000 ){
3350 rrd_set_error("the only sensible value for base apart from 1000 is 1024");
3351 return;
3352 }
3353 break;
3354 case 'w':
3355 long_tmp = atol(optarg);
3356 if (long_tmp < 10) {
3357 rrd_set_error("width below 10 pixels");
3358 return;
3359 }
3360 im->xsize = long_tmp;
3361 break;
3362 case 'h':
3363 long_tmp = atol(optarg);
3364 if (long_tmp < 10) {
3365 rrd_set_error("height below 10 pixels");
3366 return;
3367 }
3368 im->ysize = long_tmp;
3369 break;
3370 case 'i':
3371 im->canvas->interlaced = 1;
3372 break;
3373 case 'r':
3374 im->rigid = 1;
3375 break;
3376 case 'f':
3377 im->imginfo = optarg;
3378 break;
3379 case 'a':
3380 if((int)(im->canvas->imgformat = if_conv(optarg)) == -1) {
3381 rrd_set_error("unsupported graphics format '%s'",optarg);
3382 return;
3383 }
3384 break;
3385 case 'z':
3386 im->lazy = 1;
3387 break;
3388 case 'E':
3389 im->slopemode = 1;
3390 break;
3392 case 'o':
3393 im->logarithmic = 1;
3394 break;
3395 case 'c':
3396 if(sscanf(optarg,
3397 "%10[A-Z]#%n%8lx%n",
3398 col_nam,&col_start,&color,&col_end) == 2){
3399 int ci;
3400 int col_len = col_end - col_start;
3401 switch (col_len){
3402 case 3:
3403 color = (
3404 ((color & 0xF00) * 0x110000) |
3405 ((color & 0x0F0) * 0x011000) |
3406 ((color & 0x00F) * 0x001100) |
3407 0x000000FF
3408 );
3409 break;
3410 case 4:
3411 color = (
3412 ((color & 0xF000) * 0x11000) |
3413 ((color & 0x0F00) * 0x01100) |
3414 ((color & 0x00F0) * 0x00110) |
3415 ((color & 0x000F) * 0x00011)
3416 );
3417 break;
3418 case 6:
3419 color = (color << 8) + 0xff /* shift left by 8 */;
3420 break;
3421 case 8:
3422 break;
3423 default:
3424 rrd_set_error("the color format is #RRGGBB[AA]");
3425 return;
3426 }
3427 if((ci=grc_conv(col_nam)) != -1){
3428 im->graph_col[ci]=color;
3429 } else {
3430 rrd_set_error("invalid color name '%s'",col_nam);
3431 return;
3432 }
3433 } else {
3434 rrd_set_error("invalid color def format");
3435 return;
3436 }
3437 break;
3438 case 'n':{
3439 char prop[15];
3440 double size = 1;
3441 char font[1024] = "";
3443 if(sscanf(optarg,
3444 "%10[A-Z]:%lf:%1000s",
3445 prop,&size,font) >= 2){
3446 int sindex,propidx;
3447 if((sindex=text_prop_conv(prop)) != -1){
3448 for (propidx=sindex;propidx<TEXT_PROP_LAST;propidx++){
3449 if (size > 0){
3450 im->text_prop[propidx].size=size;
3451 }
3452 if (strlen(font) > 0){
3453 strcpy(im->text_prop[propidx].font,font);
3454 }
3455 if (propidx==sindex && sindex != 0) break;
3456 }
3457 } else {
3458 rrd_set_error("invalid fonttag '%s'",prop);
3459 return;
3460 }
3461 } else {
3462 rrd_set_error("invalid text property format");
3463 return;
3464 }
3465 break;
3466 }
3467 case 'm':
3468 im->canvas->zoom = atof(optarg);
3469 if (im->canvas->zoom <= 0.0) {
3470 rrd_set_error("zoom factor must be > 0");
3471 return;
3472 }
3473 break;
3474 case 't':
3475 strncpy(im->title,optarg,150);
3476 im->title[150]='\0';
3477 break;
3479 case 'R':
3480 if ( strcmp( optarg, "normal" ) == 0 )
3481 im->canvas->aa_type = AA_NORMAL;
3482 else if ( strcmp( optarg, "light" ) == 0 )
3483 im->canvas->aa_type = AA_LIGHT;
3484 else if ( strcmp( optarg, "mono" ) == 0 )
3485 im->canvas->aa_type = AA_NONE;
3486 else
3487 {
3488 rrd_set_error("unknown font-render-mode '%s'", optarg );
3489 return;
3490 }
3491 break;
3493 case 'B':
3494 im->canvas->font_aa_threshold = atof(optarg);
3495 break;
3497 case 'W':
3498 strncpy(im->watermark,optarg,100);
3499 im->watermark[99]='\0';
3500 break;
3502 case '?':
3503 if (optopt != 0)
3504 rrd_set_error("unknown option '%c'", optopt);
3505 else
3506 rrd_set_error("unknown option '%s'",argv[optind-1]);
3507 return;
3508 }
3509 }
3511 if (optind >= argc) {
3512 rrd_set_error("missing filename");
3513 return;
3514 }
3516 if (im->logarithmic == 1 && im->minval <= 0){
3517 rrd_set_error("for a logarithmic yaxis you must specify a lower-limit > 0");
3518 return;
3519 }
3521 if (proc_start_end(&start_tv,&end_tv,&start_tmp,&end_tmp) == -1){
3522 /* error string is set in parsetime.c */
3523 return;
3524 }
3526 if (start_tmp < 3600*24*365*10){
3527 rrd_set_error("the first entry to fetch should be after 1980 (%ld)",start_tmp);
3528 return;
3529 }
3531 if (end_tmp < start_tmp) {
3532 rrd_set_error("start (%ld) should be less than end (%ld)",
3533 start_tmp, end_tmp);
3534 return;
3535 }
3537 im->start = start_tmp;
3538 im->end = end_tmp;
3539 im->step = max((long)im->step, (im->end-im->start)/im->xsize);
3540 }
3542 int
3543 rrd_graph_check_vname(image_desc_t *im, char *varname, char *err)
3544 {
3545 if ((im->gdes[im->gdes_c-1].vidx=find_var(im,varname))==-1) {
3546 rrd_set_error("Unknown variable '%s' in %s",varname,err);
3547 return -1;
3548 }
3549 return 0;
3550 }
3551 int
3552 rrd_graph_color(image_desc_t *im, char *var, char *err, int optional)
3553 {
3554 char *color;
3555 graph_desc_t *gdp=&im->gdes[im->gdes_c-1];
3557 color=strstr(var,"#");
3558 if (color==NULL) {
3559 if (optional==0) {
3560 rrd_set_error("Found no color in %s",err);
3561 return 0;
3562 }
3563 return 0;
3564 } else {
3565 int n=0;
3566 char *rest;
3567 gfx_color_t col;
3569 rest=strstr(color,":");
3570 if (rest!=NULL)
3571 n=rest-color;
3572 else
3573 n=strlen(color);
3575 switch (n) {
3576 case 7:
3577 sscanf(color,"#%6lx%n",&col,&n);
3578 col = (col << 8) + 0xff /* shift left by 8 */;
3579 if (n!=7) rrd_set_error("Color problem in %s",err);
3580 break;
3581 case 9:
3582 sscanf(color,"#%8lx%n",&col,&n);
3583 if (n==9) break;
3584 default:
3585 rrd_set_error("Color problem in %s",err);
3586 }
3587 if (rrd_test_error()) return 0;
3588 gdp->col = col;
3589 return n;
3590 }
3591 }
3594 int bad_format(char *fmt) {
3595 char *ptr;
3596 int n=0;
3597 ptr = fmt;
3598 while (*ptr != '\0')
3599 if (*ptr++ == '%') {
3601 /* line cannot end with percent char */
3602 if (*ptr == '\0') return 1;
3604 /* '%s', '%S' and '%%' are allowed */
3605 if (*ptr == 's' || *ptr == 'S' || *ptr == '%') ptr++;
3607 /* %c is allowed (but use only with vdef!) */
3608 else if (*ptr == 'c') {
3609 ptr++;
3610 n=1;
3611 }
3613 /* or else '% 6.2lf' and such are allowed */
3614 else {
3615 /* optional padding character */
3616 if (*ptr == ' ' || *ptr == '+' || *ptr == '-') ptr++;
3618 /* This should take care of 'm.n' with all three optional */
3619 while (*ptr >= '0' && *ptr <= '9') ptr++;
3620 if (*ptr == '.') ptr++;
3621 while (*ptr >= '0' && *ptr <= '9') ptr++;
3623 /* Either 'le', 'lf' or 'lg' must follow here */
3624 if (*ptr++ != 'l') return 1;
3625 if (*ptr == 'e' || *ptr == 'f' || *ptr == 'g') ptr++;
3626 else return 1;
3627 n++;
3628 }
3629 }
3631 return (n!=1);
3632 }
3635 int
3636 vdef_parse(gdes,str)
3637 struct graph_desc_t *gdes;
3638 const char *const str;
3639 {
3640 /* A VDEF currently is either "func" or "param,func"
3641 * so the parsing is rather simple. Change if needed.
3642 */
3643 double param;
3644 char func[30];
3645 int n;
3647 n=0;
3648 sscanf(str,"%le,%29[A-Z]%n",¶m,func,&n);
3649 if (n== (int)strlen(str)) { /* matched */
3650 ;
3651 } else {
3652 n=0;
3653 sscanf(str,"%29[A-Z]%n",func,&n);
3654 if (n== (int)strlen(str)) { /* matched */
3655 param=DNAN;
3656 } else {
3657 rrd_set_error("Unknown function string '%s' in VDEF '%s'"
3658 ,str
3659 ,gdes->vname
3660 );
3661 return -1;
3662 }
3663 }
3664 if (!strcmp("PERCENT",func)) gdes->vf.op = VDEF_PERCENT;
3665 else if (!strcmp("MAXIMUM",func)) gdes->vf.op = VDEF_MAXIMUM;
3666 else if (!strcmp("AVERAGE",func)) gdes->vf.op = VDEF_AVERAGE;
3667 else if (!strcmp("MINIMUM",func)) gdes->vf.op = VDEF_MINIMUM;
3668 else if (!strcmp("TOTAL", func)) gdes->vf.op = VDEF_TOTAL;
3669 else if (!strcmp("FIRST", func)) gdes->vf.op = VDEF_FIRST;
3670 else if (!strcmp("LAST", func)) gdes->vf.op = VDEF_LAST;
3671 else if (!strcmp("LSLSLOPE", func)) gdes->vf.op = VDEF_LSLSLOPE;
3672 else if (!strcmp("LSLINT", func)) gdes->vf.op = VDEF_LSLINT;
3673 else if (!strcmp("LSLCORREL",func)) gdes->vf.op = VDEF_LSLCORREL;
3674 else {
3675 rrd_set_error("Unknown function '%s' in VDEF '%s'\n"
3676 ,func
3677 ,gdes->vname
3678 );
3679 return -1;
3680 };
3682 switch (gdes->vf.op) {
3683 case VDEF_PERCENT:
3684 if (isnan(param)) { /* no parameter given */
3685 rrd_set_error("Function '%s' needs parameter in VDEF '%s'\n"
3686 ,func
3687 ,gdes->vname
3688 );
3689 return -1;
3690 };
3691 if (param>=0.0 && param<=100.0) {
3692 gdes->vf.param = param;
3693 gdes->vf.val = DNAN; /* undefined */
3694 gdes->vf.when = 0; /* undefined */
3695 } else {
3696 rrd_set_error("Parameter '%f' out of range in VDEF '%s'\n"
3697 ,param
3698 ,gdes->vname
3699 );
3700 return -1;
3701 };
3702 break;
3703 case VDEF_MAXIMUM:
3704 case VDEF_AVERAGE:
3705 case VDEF_MINIMUM:
3706 case VDEF_TOTAL:
3707 case VDEF_FIRST:
3708 case VDEF_LAST:
3709 case VDEF_LSLSLOPE:
3710 case VDEF_LSLINT:
3711 case VDEF_LSLCORREL:
3712 if (isnan(param)) {
3713 gdes->vf.param = DNAN;
3714 gdes->vf.val = DNAN;
3715 gdes->vf.when = 0;
3716 } else {
3717 rrd_set_error("Function '%s' needs no parameter in VDEF '%s'\n"
3718 ,func
3719 ,gdes->vname
3720 );
3721 return -1;
3722 };
3723 break;
3724 };
3725 return 0;
3726 }
3729 int
3730 vdef_calc(im,gdi)
3731 image_desc_t *im;
3732 int gdi;
3733 {
3734 graph_desc_t *src,*dst;
3735 rrd_value_t *data;
3736 long step,steps;
3738 dst = &im->gdes[gdi];
3739 src = &im->gdes[dst->vidx];
3740 data = src->data + src->ds;
3741 steps = (src->end - src->start) / src->step;
3743 #if 0
3744 printf("DEBUG: start == %lu, end == %lu, %lu steps\n"
3745 ,src->start
3746 ,src->end
3747 ,steps
3748 );
3749 #endif
3751 switch (dst->vf.op) {
3752 case VDEF_PERCENT: {
3753 rrd_value_t * array;
3754 int field;
3757 if ((array = malloc(steps*sizeof(double)))==NULL) {
3758 rrd_set_error("malloc VDEV_PERCENT");
3759 return -1;
3760 }
3761 for (step=0;step < steps; step++) {
3762 array[step]=data[step*src->ds_cnt];
3763 }
3764 qsort(array,step,sizeof(double),vdef_percent_compar);
3766 field = (steps-1)*dst->vf.param/100;
3767 dst->vf.val = array[field];
3768 dst->vf.when = 0; /* no time component */
3769 free(array);
3770 #if 0
3771 for(step=0;step<steps;step++)
3772 printf("DEBUG: %3li:%10.2f %c\n",step,array[step],step==field?'*':' ');
3773 #endif
3774 }
3775 break;
3776 case VDEF_MAXIMUM:
3777 step=0;
3778 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3779 if (step == steps) {
3780 dst->vf.val = DNAN;
3781 dst->vf.when = 0;
3782 } else {
3783 dst->vf.val = data[step*src->ds_cnt];
3784 dst->vf.when = src->start + (step+1)*src->step;
3785 }
3786 while (step != steps) {
3787 if (finite(data[step*src->ds_cnt])) {
3788 if (data[step*src->ds_cnt] > dst->vf.val) {
3789 dst->vf.val = data[step*src->ds_cnt];
3790 dst->vf.when = src->start + (step+1)*src->step;
3791 }
3792 }
3793 step++;
3794 }
3795 break;
3796 case VDEF_TOTAL:
3797 case VDEF_AVERAGE: {
3798 int cnt=0;
3799 double sum=0.0;
3800 for (step=0;step<steps;step++) {
3801 if (finite(data[step*src->ds_cnt])) {
3802 sum += data[step*src->ds_cnt];
3803 cnt ++;
3804 };
3805 }
3806 if (cnt) {
3807 if (dst->vf.op == VDEF_TOTAL) {
3808 dst->vf.val = sum*src->step;
3809 dst->vf.when = 0; /* no time component */
3810 } else {
3811 dst->vf.val = sum/cnt;
3812 dst->vf.when = 0; /* no time component */
3813 };
3814 } else {
3815 dst->vf.val = DNAN;
3816 dst->vf.when = 0;
3817 }
3818 }
3819 break;
3820 case VDEF_MINIMUM:
3821 step=0;
3822 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3823 if (step == steps) {
3824 dst->vf.val = DNAN;
3825 dst->vf.when = 0;
3826 } else {
3827 dst->vf.val = data[step*src->ds_cnt];
3828 dst->vf.when = src->start + (step+1)*src->step;
3829 }
3830 while (step != steps) {
3831 if (finite(data[step*src->ds_cnt])) {
3832 if (data[step*src->ds_cnt] < dst->vf.val) {
3833 dst->vf.val = data[step*src->ds_cnt];
3834 dst->vf.when = src->start + (step+1)*src->step;
3835 }
3836 }
3837 step++;
3838 }
3839 break;
3840 case VDEF_FIRST:
3841 /* The time value returned here is one step before the
3842 * actual time value. This is the start of the first
3843 * non-NaN interval.
3844 */
3845 step=0;
3846 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3847 if (step == steps) { /* all entries were NaN */
3848 dst->vf.val = DNAN;
3849 dst->vf.when = 0;
3850 } else {
3851 dst->vf.val = data[step*src->ds_cnt];
3852 dst->vf.when = src->start + step*src->step;
3853 }
3854 break;
3855 case VDEF_LAST:
3856 /* The time value returned here is the
3857 * actual time value. This is the end of the last
3858 * non-NaN interval.
3859 */
3860 step=steps-1;
3861 while (step >= 0 && isnan(data[step*src->ds_cnt])) step--;
3862 if (step < 0) { /* all entries were NaN */
3863 dst->vf.val = DNAN;
3864 dst->vf.when = 0;
3865 } else {
3866 dst->vf.val = data[step*src->ds_cnt];
3867 dst->vf.when = src->start + (step+1)*src->step;
3868 }
3869 break;
3870 case VDEF_LSLSLOPE:
3871 case VDEF_LSLINT:
3872 case VDEF_LSLCORREL:{
3873 /* Bestfit line by linear least squares method */
3875 int cnt=0;
3876 double SUMx, SUMy, SUMxy, SUMxx, SUMyy, slope, y_intercept, correl ;
3877 SUMx = 0; SUMy = 0; SUMxy = 0; SUMxx = 0; SUMyy = 0;
3879 for (step=0;step<steps;step++) {
3880 if (finite(data[step*src->ds_cnt])) {
3881 cnt++;
3882 SUMx += step;
3883 SUMxx += step * step;
3884 SUMxy += step * data[step*src->ds_cnt];
3885 SUMy += data[step*src->ds_cnt];
3886 SUMyy += data[step*src->ds_cnt]*data[step*src->ds_cnt];
3887 };
3888 }
3890 slope = ( SUMx*SUMy - cnt*SUMxy ) / ( SUMx*SUMx - cnt*SUMxx );
3891 y_intercept = ( SUMy - slope*SUMx ) / cnt;
3892 correl = (SUMxy - (SUMx*SUMy)/cnt) / sqrt((SUMxx - (SUMx*SUMx)/cnt)*(SUMyy - (SUMy*SUMy)/cnt));
3894 if (cnt) {
3895 if (dst->vf.op == VDEF_LSLSLOPE) {
3896 dst->vf.val = slope;
3897 dst->vf.when = 0;
3898 } else if (dst->vf.op == VDEF_LSLINT) {
3899 dst->vf.val = y_intercept;
3900 dst->vf.when = 0;
3901 } else if (dst->vf.op == VDEF_LSLCORREL) {
3902 dst->vf.val = correl;
3903 dst->vf.when = 0;
3904 };
3906 } else {
3907 dst->vf.val = DNAN;
3908 dst->vf.when = 0;
3909 }
3910 }
3911 break;
3912 }
3913 return 0;
3914 }
3916 /* NaN < -INF < finite_values < INF */
3917 int
3918 vdef_percent_compar(a,b)
3919 const void *a,*b;
3920 {
3921 /* Equality is not returned; this doesn't hurt except
3922 * (maybe) for a little performance.
3923 */
3925 /* First catch NaN values. They are smallest */
3926 if (isnan( *(double *)a )) return -1;
3927 if (isnan( *(double *)b )) return 1;
3929 /* NaN doesn't reach this part so INF and -INF are extremes.
3930 * The sign from isinf() is compatible with the sign we return
3931 */
3932 if (isinf( *(double *)a )) return isinf( *(double *)a );
3933 if (isinf( *(double *)b )) return isinf( *(double *)b );
3935 /* If we reach this, both values must be finite */
3936 if ( *(double *)a < *(double *)b ) return -1; else return 1;
3937 }