![[tokkee]](http://tokkee.org/images/avatar.png){kind=avatar}
1 /****************************************************************************
2 * RRDtool 1.2rc4 Copyright by Tobi Oetiker, 1997-2005
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 <io.h>
14 #include <fcntl.h>
15 #endif
17 #ifdef HAVE_TIME_H
18 #include <time.h>
19 #endif
21 #ifdef HAVE_LOCALE_H
22 #include <locale.h>
23 #endif
25 #include "rrd_graph.h"
27 /* some constant definitions */
31 #ifndef RRD_DEFAULT_FONT
32 /* there is special code later to pick Cour.ttf when running on windows */
33 #define RRD_DEFAULT_FONT "VeraMono.ttf"
34 #endif
36 text_prop_t text_prop[] = {
37 { 9.0, RRD_DEFAULT_FONT }, /* default */
38 { 11.0, RRD_DEFAULT_FONT }, /* title */
39 { 8.0, RRD_DEFAULT_FONT }, /* axis */
40 { 9.0, RRD_DEFAULT_FONT }, /* unit */
41 { 9.0, RRD_DEFAULT_FONT } /* legend */
42 };
44 xlab_t xlab[] = {
45 {0, TMT_SECOND,30, TMT_MINUTE,5, TMT_MINUTE,5, 0,"%H:%M"},
46 {2, TMT_MINUTE,1, TMT_MINUTE,5, TMT_MINUTE,5, 0,"%H:%M"},
47 {5, TMT_MINUTE,2, TMT_MINUTE,10, TMT_MINUTE,10, 0,"%H:%M"},
48 {10, TMT_MINUTE,5, TMT_MINUTE,20, TMT_MINUTE,20, 0,"%H:%M"},
49 {30, TMT_MINUTE,10, TMT_HOUR,1, TMT_HOUR,1, 0,"%H:%M"},
50 {60, TMT_MINUTE,30, TMT_HOUR,2, TMT_HOUR,2, 0,"%H:%M"},
51 {180, TMT_HOUR,1, TMT_HOUR,6, TMT_HOUR,6, 0,"%H:%M"},
52 /*{300, TMT_HOUR,3, TMT_HOUR,12, TMT_HOUR,12, 12*3600,"%a %p"}, this looks silly*/
53 {600, TMT_HOUR,6, TMT_DAY,1, TMT_DAY,1, 24*3600,"%a"},
54 {1800, TMT_HOUR,12, TMT_DAY,1, TMT_DAY,2, 24*3600,"%a"},
55 {3600, TMT_DAY,1, TMT_WEEK,1, TMT_WEEK,1, 7*24*3600,"Week %V"},
56 {3*3600, TMT_WEEK,1, TMT_MONTH,1, TMT_WEEK,2, 7*24*3600,"Week %V"},
57 {6*3600, TMT_MONTH,1, TMT_MONTH,1, TMT_MONTH,1, 30*24*3600,"%b"},
58 {48*3600, TMT_MONTH,1, TMT_MONTH,3, TMT_MONTH,3, 30*24*3600,"%b"},
59 {10*24*3600, TMT_YEAR,1, TMT_YEAR,1, TMT_YEAR,1, 365*24*3600,"%y"},
60 {-1,TMT_MONTH,0,TMT_MONTH,0,TMT_MONTH,0,0,""}
61 };
63 /* sensible logarithmic y label intervals ...
64 the first element of each row defines the possible starting points on the
65 y axis ... the other specify the */
67 double yloglab[][12]= {{ 1e9, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
68 { 1e3, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
69 { 1e1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
70 /* { 1e1, 1, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, */
71 { 1e1, 1, 2.5, 5, 7.5, 0, 0, 0, 0, 0, 0, 0 },
72 { 1e1, 1, 2, 4, 6, 8, 0, 0, 0, 0, 0, 0 },
73 { 1e1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0 },
74 { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }};
76 /* sensible y label intervals ...*/
78 ylab_t ylab[]= {
79 {0.1, {1,2, 5,10}},
80 {0.2, {1,5,10,20}},
81 {0.5, {1,2, 4,10}},
82 {1.0, {1,2, 5,10}},
83 {2.0, {1,5,10,20}},
84 {5.0, {1,2, 4,10}},
85 {10.0, {1,2, 5,10}},
86 {20.0, {1,5,10,20}},
87 {50.0, {1,2, 4,10}},
88 {100.0, {1,2, 5,10}},
89 {200.0, {1,5,10,20}},
90 {500.0, {1,2, 4,10}},
91 {0.0, {0,0,0,0}}};
94 gfx_color_t graph_col[] = /* default colors */
95 { 0xFFFFFFFF, /* canvas */
96 0xF0F0F0FF, /* background */
97 0xD0D0D0FF, /* shade A */
98 0xA0A0A0FF, /* shade B */
99 0x90909080, /* grid */
100 0xE0505080, /* major grid */
101 0x000000FF, /* font */
102 0xFF0000FF, /* arrow */
103 0x404040FF /* axis */
104 };
107 /* #define DEBUG */
109 #ifdef DEBUG
110 # define DPRINT(x) (void)(printf x, printf("\n"))
111 #else
112 # define DPRINT(x)
113 #endif
116 /* initialize with xtr(im,0); */
117 int
118 xtr(image_desc_t *im,time_t mytime){
119 static double pixie;
120 if (mytime==0){
121 pixie = (double) im->xsize / (double)(im->end - im->start);
122 return im->xorigin;
123 }
124 return (int)((double)im->xorigin
125 + pixie * ( mytime - im->start ) );
126 }
128 /* translate data values into y coordinates */
129 double
130 ytr(image_desc_t *im, double value){
131 static double pixie;
132 double yval;
133 if (isnan(value)){
134 if(!im->logarithmic)
135 pixie = (double) im->ysize / (im->maxval - im->minval);
136 else
137 pixie = (double) im->ysize / (log10(im->maxval) - log10(im->minval));
138 yval = im->yorigin;
139 } else if(!im->logarithmic) {
140 yval = im->yorigin - pixie * (value - im->minval);
141 } else {
142 if (value < im->minval) {
143 yval = im->yorigin;
144 } else {
145 yval = im->yorigin - pixie * (log10(value) - log10(im->minval));
146 }
147 }
148 /* make sure we don't return anything too unreasonable. GD lib can
149 get terribly slow when drawing lines outside its scope. This is
150 especially problematic in connection with the rigid option */
151 if (! im->rigid) {
152 /* keep yval as-is */
153 } else if (yval > im->yorigin) {
154 yval = im->yorigin+2;
155 } else if (yval < im->yorigin - im->ysize){
156 yval = im->yorigin - im->ysize - 2;
157 }
158 return yval;
159 }
163 /* conversion function for symbolic entry names */
166 #define conv_if(VV,VVV) \
167 if (strcmp(#VV, string) == 0) return VVV ;
169 enum gf_en gf_conv(char *string){
171 conv_if(PRINT,GF_PRINT)
172 conv_if(GPRINT,GF_GPRINT)
173 conv_if(COMMENT,GF_COMMENT)
174 conv_if(HRULE,GF_HRULE)
175 conv_if(VRULE,GF_VRULE)
176 conv_if(LINE,GF_LINE)
177 conv_if(AREA,GF_AREA)
178 conv_if(STACK,GF_STACK)
179 conv_if(TICK,GF_TICK)
180 conv_if(DEF,GF_DEF)
181 conv_if(CDEF,GF_CDEF)
182 conv_if(VDEF,GF_VDEF)
183 #ifdef WITH_PIECHART
184 conv_if(PART,GF_PART)
185 #endif
186 conv_if(XPORT,GF_XPORT)
187 conv_if(SHIFT,GF_SHIFT)
189 return (-1);
190 }
192 enum gfx_if_en if_conv(char *string){
194 conv_if(PNG,IF_PNG)
195 conv_if(SVG,IF_SVG)
196 conv_if(EPS,IF_EPS)
197 conv_if(PDF,IF_PDF)
199 return (-1);
200 }
202 enum tmt_en tmt_conv(char *string){
204 conv_if(SECOND,TMT_SECOND)
205 conv_if(MINUTE,TMT_MINUTE)
206 conv_if(HOUR,TMT_HOUR)
207 conv_if(DAY,TMT_DAY)
208 conv_if(WEEK,TMT_WEEK)
209 conv_if(MONTH,TMT_MONTH)
210 conv_if(YEAR,TMT_YEAR)
211 return (-1);
212 }
214 enum grc_en grc_conv(char *string){
216 conv_if(BACK,GRC_BACK)
217 conv_if(CANVAS,GRC_CANVAS)
218 conv_if(SHADEA,GRC_SHADEA)
219 conv_if(SHADEB,GRC_SHADEB)
220 conv_if(GRID,GRC_GRID)
221 conv_if(MGRID,GRC_MGRID)
222 conv_if(FONT,GRC_FONT)
223 conv_if(ARROW,GRC_ARROW)
224 conv_if(AXIS,GRC_AXIS)
226 return -1;
227 }
229 enum text_prop_en text_prop_conv(char *string){
231 conv_if(DEFAULT,TEXT_PROP_DEFAULT)
232 conv_if(TITLE,TEXT_PROP_TITLE)
233 conv_if(AXIS,TEXT_PROP_AXIS)
234 conv_if(UNIT,TEXT_PROP_UNIT)
235 conv_if(LEGEND,TEXT_PROP_LEGEND)
236 return -1;
237 }
240 #undef conv_if
242 int
243 im_free(image_desc_t *im)
244 {
245 unsigned long i,ii;
247 if (im == NULL) return 0;
248 for(i=0;i<(unsigned)im->gdes_c;i++){
249 if (im->gdes[i].data_first){
250 /* careful here, because a single pointer can occur several times */
251 free (im->gdes[i].data);
252 if (im->gdes[i].ds_namv){
253 for (ii=0;ii<im->gdes[i].ds_cnt;ii++)
254 free(im->gdes[i].ds_namv[ii]);
255 free(im->gdes[i].ds_namv);
256 }
257 }
258 free (im->gdes[i].p_data);
259 free (im->gdes[i].rpnp);
260 }
261 free(im->gdes);
262 gfx_destroy(im->canvas);
263 return 0;
264 }
266 /* find SI magnitude symbol for the given number*/
267 void
268 auto_scale(
269 image_desc_t *im, /* image description */
270 double *value,
271 char **symb_ptr,
272 double *magfact
273 )
274 {
276 char *symbol[] = {"a", /* 10e-18 Atto */
277 "f", /* 10e-15 Femto */
278 "p", /* 10e-12 Pico */
279 "n", /* 10e-9 Nano */
280 "u", /* 10e-6 Micro */
281 "m", /* 10e-3 Milli */
282 " ", /* Base */
283 "k", /* 10e3 Kilo */
284 "M", /* 10e6 Mega */
285 "G", /* 10e9 Giga */
286 "T", /* 10e12 Tera */
287 "P", /* 10e15 Peta */
288 "E"};/* 10e18 Exa */
290 int symbcenter = 6;
291 int sindex;
293 if (*value == 0.0 || isnan(*value) ) {
294 sindex = 0;
295 *magfact = 1.0;
296 } else {
297 sindex = floor(log(fabs(*value))/log((double)im->base));
298 *magfact = pow((double)im->base, (double)sindex);
299 (*value) /= (*magfact);
300 }
301 if ( sindex <= symbcenter && sindex >= -symbcenter) {
302 (*symb_ptr) = symbol[sindex+symbcenter];
303 }
304 else {
305 (*symb_ptr) = "?";
306 }
307 }
310 /* find SI magnitude symbol for the numbers on the y-axis*/
311 void
312 si_unit(
313 image_desc_t *im /* image description */
314 )
315 {
317 char symbol[] = {'a', /* 10e-18 Atto */
318 'f', /* 10e-15 Femto */
319 'p', /* 10e-12 Pico */
320 'n', /* 10e-9 Nano */
321 'u', /* 10e-6 Micro */
322 'm', /* 10e-3 Milli */
323 ' ', /* Base */
324 'k', /* 10e3 Kilo */
325 'M', /* 10e6 Mega */
326 'G', /* 10e9 Giga */
327 'T', /* 10e12 Tera */
328 'P', /* 10e15 Peta */
329 'E'};/* 10e18 Exa */
331 int symbcenter = 6;
332 double digits;
334 if (im->unitsexponent != 9999) {
335 /* unitsexponent = 9, 6, 3, 0, -3, -6, -9, etc */
336 digits = floor(im->unitsexponent / 3);
337 } else {
338 digits = floor( log( max( fabs(im->minval),fabs(im->maxval)))/log((double)im->base));
339 }
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 if ( ((digits+symbcenter) < sizeof(symbol)) &&
347 ((digits+symbcenter) >= 0) )
348 im->symbol = symbol[(int)digits+symbcenter];
349 else
350 im->symbol = ' ';
351 }
353 /* move min and max values around to become sensible */
355 void
356 expand_range(image_desc_t *im)
357 {
358 double sensiblevalues[] ={1000.0,900.0,800.0,750.0,700.0,
359 600.0,500.0,400.0,300.0,250.0,
360 200.0,125.0,100.0,90.0,80.0,
361 75.0,70.0,60.0,50.0,40.0,30.0,
362 25.0,20.0,10.0,9.0,8.0,
363 7.0,6.0,5.0,4.0,3.5,3.0,
364 2.5,2.0,1.8,1.5,1.2,1.0,
365 0.8,0.7,0.6,0.5,0.4,0.3,0.2,0.1,0.0,-1};
367 double scaled_min,scaled_max;
368 double adj;
369 int i;
373 #ifdef DEBUG
374 printf("Min: %6.2f Max: %6.2f MagFactor: %6.2f\n",
375 im->minval,im->maxval,im->magfact);
376 #endif
378 if (isnan(im->ygridstep)){
379 if(im->extra_flags & ALTAUTOSCALE) {
380 /* measure the amplitude of the function. Make sure that
381 graph boundaries are slightly higher then max/min vals
382 so we can see amplitude on the graph */
383 double delt, fact;
385 delt = im->maxval - im->minval;
386 adj = delt * 0.1;
387 fact = 2.0 * pow(10.0,
388 floor(log10(max(fabs(im->minval), fabs(im->maxval)))) - 2);
389 if (delt < fact) {
390 adj = (fact - delt) * 0.55;
391 #ifdef DEBUG
392 printf("Min: %6.2f Max: %6.2f delt: %6.2f fact: %6.2f adj: %6.2f\n", im->minval, im->maxval, delt, fact, adj);
393 #endif
394 }
395 im->minval -= adj;
396 im->maxval += adj;
397 }
398 else if(im->extra_flags & ALTAUTOSCALE_MAX) {
399 /* measure the amplitude of the function. Make sure that
400 graph boundaries are slightly higher than max vals
401 so we can see amplitude on the graph */
402 adj = (im->maxval - im->minval) * 0.1;
403 im->maxval += adj;
404 }
405 else {
406 scaled_min = im->minval / im->magfact;
407 scaled_max = im->maxval / im->magfact;
409 for (i=1; sensiblevalues[i] > 0; i++){
410 if (sensiblevalues[i-1]>=scaled_min &&
411 sensiblevalues[i]<=scaled_min)
412 im->minval = sensiblevalues[i]*(im->magfact);
414 if (-sensiblevalues[i-1]<=scaled_min &&
415 -sensiblevalues[i]>=scaled_min)
416 im->minval = -sensiblevalues[i-1]*(im->magfact);
418 if (sensiblevalues[i-1] >= scaled_max &&
419 sensiblevalues[i] <= scaled_max)
420 im->maxval = sensiblevalues[i-1]*(im->magfact);
422 if (-sensiblevalues[i-1]<=scaled_max &&
423 -sensiblevalues[i] >=scaled_max)
424 im->maxval = -sensiblevalues[i]*(im->magfact);
425 }
426 }
427 } else {
428 /* adjust min and max to the grid definition if there is one */
429 im->minval = (double)im->ylabfact * im->ygridstep *
430 floor(im->minval / ((double)im->ylabfact * im->ygridstep));
431 im->maxval = (double)im->ylabfact * im->ygridstep *
432 ceil(im->maxval /( (double)im->ylabfact * im->ygridstep));
433 }
435 #ifdef DEBUG
436 fprintf(stderr,"SCALED Min: %6.2f Max: %6.2f Factor: %6.2f\n",
437 im->minval,im->maxval,im->magfact);
438 #endif
439 }
441 void
442 apply_gridfit(image_desc_t *im)
443 {
444 if (isnan(im->minval) || isnan(im->maxval))
445 return;
446 ytr(im,DNAN);
447 if (im->logarithmic) {
448 double ya, yb, ypix, ypixfrac;
449 double log10_range = log10(im->maxval) - log10(im->minval);
450 ya = pow((double)10, floor(log10(im->minval)));
451 while (ya < im->minval)
452 ya *= 10;
453 if (ya > im->maxval)
454 return; /* don't have y=10^x gridline */
455 yb = ya * 10;
456 if (yb <= im->maxval) {
457 /* we have at least 2 y=10^x gridlines.
458 Make sure distance between them in pixels
459 are an integer by expanding im->maxval */
460 double y_pixel_delta = ytr(im, ya) - ytr(im, yb);
461 double factor = y_pixel_delta / floor(y_pixel_delta);
462 double new_log10_range = factor * log10_range;
463 double new_ymax_log10 = log10(im->minval) + new_log10_range;
464 im->maxval = pow(10, new_ymax_log10);
465 ytr(im, DNAN); /* reset precalc */
466 log10_range = log10(im->maxval) - log10(im->minval);
467 }
468 /* make sure first y=10^x gridline is located on
469 integer pixel position by moving scale slightly
470 downwards (sub-pixel movement) */
471 ypix = ytr(im, ya) + im->ysize; /* add im->ysize so it always is positive */
472 ypixfrac = ypix - floor(ypix);
473 if (ypixfrac > 0 && ypixfrac < 1) {
474 double yfrac = ypixfrac / im->ysize;
475 im->minval = pow(10, log10(im->minval) - yfrac * log10_range);
476 im->maxval = pow(10, log10(im->maxval) - yfrac * log10_range);
477 ytr(im, DNAN); /* reset precalc */
478 }
479 } else {
480 /* Make sure we have an integer pixel distance between
481 each minor gridline */
482 double ypos1 = ytr(im, im->minval);
483 double ypos2 = ytr(im, im->minval + im->ygrid_scale.gridstep);
484 double y_pixel_delta = ypos1 - ypos2;
485 double factor = y_pixel_delta / floor(y_pixel_delta);
486 double new_range = factor * (im->maxval - im->minval);
487 double gridstep = im->ygrid_scale.gridstep;
488 double minor_y, minor_y_px, minor_y_px_frac;
489 im->maxval = im->minval + new_range;
490 ytr(im, DNAN); /* reset precalc */
491 /* make sure first minor gridline is on integer pixel y coord */
492 minor_y = gridstep * floor(im->minval / gridstep);
493 while (minor_y < im->minval)
494 minor_y += gridstep;
495 minor_y_px = ytr(im, minor_y) + im->ysize; /* ensure > 0 by adding ysize */
496 minor_y_px_frac = minor_y_px - floor(minor_y_px);
497 if (minor_y_px_frac > 0 && minor_y_px_frac < 1) {
498 double yfrac = minor_y_px_frac / im->ysize;
499 double range = im->maxval - im->minval;
500 im->minval = im->minval - yfrac * range;
501 im->maxval = im->maxval - yfrac * range;
502 ytr(im, DNAN); /* reset precalc */
503 }
504 calc_horizontal_grid(im); /* recalc with changed im->maxval */
505 }
506 }
508 /* reduce data reimplementation by Alex */
510 void
511 reduce_data(
512 enum cf_en cf, /* which consolidation function ?*/
513 unsigned long cur_step, /* step the data currently is in */
514 time_t *start, /* start, end and step as requested ... */
515 time_t *end, /* ... by the application will be ... */
516 unsigned long *step, /* ... adjusted to represent reality */
517 unsigned long *ds_cnt, /* number of data sources in file */
518 rrd_value_t **data) /* two dimensional array containing the data */
519 {
520 int i,reduce_factor = ceil((double)(*step) / (double)cur_step);
521 unsigned long col,dst_row,row_cnt,start_offset,end_offset,skiprows=0;
522 rrd_value_t *srcptr,*dstptr;
524 (*step) = cur_step*reduce_factor; /* set new step size for reduced data */
525 dstptr = *data;
526 srcptr = *data;
527 row_cnt = ((*end)-(*start))/cur_step;
529 #ifdef DEBUG
530 #define DEBUG_REDUCE
531 #endif
532 #ifdef DEBUG_REDUCE
533 printf("Reducing %lu rows with factor %i time %lu to %lu, step %lu\n",
534 row_cnt,reduce_factor,*start,*end,cur_step);
535 for (col=0;col<row_cnt;col++) {
536 printf("time %10lu: ",*start+(col+1)*cur_step);
537 for (i=0;i<*ds_cnt;i++)
538 printf(" %8.2e",srcptr[*ds_cnt*col+i]);
539 printf("\n");
540 }
541 #endif
543 /* We have to combine [reduce_factor] rows of the source
544 ** into one row for the destination. Doing this we also
545 ** need to take care to combine the correct rows. First
546 ** alter the start and end time so that they are multiples
547 ** of the new step time. We cannot reduce the amount of
548 ** time so we have to move the end towards the future and
549 ** the start towards the past.
550 */
551 end_offset = (*end) % (*step);
552 start_offset = (*start) % (*step);
554 /* If there is a start offset (which cannot be more than
555 ** one destination row), skip the appropriate number of
556 ** source rows and one destination row. The appropriate
557 ** number is what we do know (start_offset/cur_step) of
558 ** the new interval (*step/cur_step aka reduce_factor).
559 */
560 #ifdef DEBUG_REDUCE
561 printf("start_offset: %lu end_offset: %lu\n",start_offset,end_offset);
562 printf("row_cnt before: %lu\n",row_cnt);
563 #endif
564 if (start_offset) {
565 (*start) = (*start)-start_offset;
566 skiprows=reduce_factor-start_offset/cur_step;
567 srcptr+=skiprows* *ds_cnt;
568 for (col=0;col<(*ds_cnt);col++) *dstptr++ = DNAN;
569 row_cnt-=skiprows;
570 }
571 #ifdef DEBUG_REDUCE
572 printf("row_cnt between: %lu\n",row_cnt);
573 #endif
575 /* At the end we have some rows that are not going to be
576 ** used, the amount is end_offset/cur_step
577 */
578 if (end_offset) {
579 (*end) = (*end)-end_offset+(*step);
580 skiprows = end_offset/cur_step;
581 row_cnt-=skiprows;
582 }
583 #ifdef DEBUG_REDUCE
584 printf("row_cnt after: %lu\n",row_cnt);
585 #endif
587 /* Sanity check: row_cnt should be multiple of reduce_factor */
588 /* if this gets triggered, something is REALLY WRONG ... we die immediately */
590 if (row_cnt%reduce_factor) {
591 printf("SANITY CHECK: %lu rows cannot be reduced by %i \n",
592 row_cnt,reduce_factor);
593 printf("BUG in reduce_data()\n");
594 exit(1);
595 }
597 /* Now combine reduce_factor intervals at a time
598 ** into one interval for the destination.
599 */
601 for (dst_row=0;(long int)row_cnt>=reduce_factor;dst_row++) {
602 for (col=0;col<(*ds_cnt);col++) {
603 rrd_value_t newval=DNAN;
604 unsigned long validval=0;
606 for (i=0;i<reduce_factor;i++) {
607 if (isnan(srcptr[i*(*ds_cnt)+col])) {
608 continue;
609 }
610 validval++;
611 if (isnan(newval)) newval = srcptr[i*(*ds_cnt)+col];
612 else {
613 switch (cf) {
614 case CF_HWPREDICT:
615 case CF_DEVSEASONAL:
616 case CF_DEVPREDICT:
617 case CF_SEASONAL:
618 case CF_AVERAGE:
619 newval += srcptr[i*(*ds_cnt)+col];
620 break;
621 case CF_MINIMUM:
622 newval = min (newval,srcptr[i*(*ds_cnt)+col]);
623 break;
624 case CF_FAILURES:
625 /* an interval contains a failure if any subintervals contained a failure */
626 case CF_MAXIMUM:
627 newval = max (newval,srcptr[i*(*ds_cnt)+col]);
628 break;
629 case CF_LAST:
630 newval = srcptr[i*(*ds_cnt)+col];
631 break;
632 }
633 }
634 }
635 if (validval == 0){newval = DNAN;} else{
636 switch (cf) {
637 case CF_HWPREDICT:
638 case CF_DEVSEASONAL:
639 case CF_DEVPREDICT:
640 case CF_SEASONAL:
641 case CF_AVERAGE:
642 newval /= validval;
643 break;
644 case CF_MINIMUM:
645 case CF_FAILURES:
646 case CF_MAXIMUM:
647 case CF_LAST:
648 break;
649 }
650 }
651 *dstptr++=newval;
652 }
653 srcptr+=(*ds_cnt)*reduce_factor;
654 row_cnt-=reduce_factor;
655 }
656 /* If we had to alter the endtime, we didn't have enough
657 ** source rows to fill the last row. Fill it with NaN.
658 */
659 if (end_offset) for (col=0;col<(*ds_cnt);col++) *dstptr++ = DNAN;
660 #ifdef DEBUG_REDUCE
661 row_cnt = ((*end)-(*start))/ *step;
662 srcptr = *data;
663 printf("Done reducing. Currently %lu rows, time %lu to %lu, step %lu\n",
664 row_cnt,*start,*end,*step);
665 for (col=0;col<row_cnt;col++) {
666 printf("time %10lu: ",*start+(col+1)*(*step));
667 for (i=0;i<*ds_cnt;i++)
668 printf(" %8.2e",srcptr[*ds_cnt*col+i]);
669 printf("\n");
670 }
671 #endif
672 }
675 /* get the data required for the graphs from the
676 relevant rrds ... */
678 int
679 data_fetch(image_desc_t *im )
680 {
681 int i,ii;
682 int skip;
684 /* pull the data from the log files ... */
685 for (i=0;i< (int)im->gdes_c;i++){
686 /* only GF_DEF elements fetch data */
687 if (im->gdes[i].gf != GF_DEF)
688 continue;
690 skip=0;
691 /* do we have it already ?*/
692 for (ii=0;ii<i;ii++) {
693 if (im->gdes[ii].gf != GF_DEF)
694 continue;
695 if ((strcmp(im->gdes[i].rrd, im->gdes[ii].rrd) == 0)
696 && (im->gdes[i].cf == im->gdes[ii].cf)
697 && (im->gdes[i].cf_reduce == im->gdes[ii].cf_reduce)
698 && (im->gdes[i].start == im->gdes[ii].start)
699 && (im->gdes[i].end == im->gdes[ii].end)
700 && (im->gdes[i].step == im->gdes[ii].step)) {
701 /* OK, the data is already there.
702 ** Just copy the header portion
703 */
704 im->gdes[i].start = im->gdes[ii].start;
705 im->gdes[i].end = im->gdes[ii].end;
706 im->gdes[i].step = im->gdes[ii].step;
707 im->gdes[i].ds_cnt = im->gdes[ii].ds_cnt;
708 im->gdes[i].ds_namv = im->gdes[ii].ds_namv;
709 im->gdes[i].data = im->gdes[ii].data;
710 im->gdes[i].data_first = 0;
711 skip=1;
712 }
713 if (skip)
714 break;
715 }
716 if (! skip) {
717 unsigned long ft_step = im->gdes[i].step ;
719 if((rrd_fetch_fn(im->gdes[i].rrd,
720 im->gdes[i].cf,
721 &im->gdes[i].start,
722 &im->gdes[i].end,
723 &ft_step,
724 &im->gdes[i].ds_cnt,
725 &im->gdes[i].ds_namv,
726 &im->gdes[i].data)) == -1){
727 return -1;
728 }
729 im->gdes[i].data_first = 1;
730 im->gdes[i].step = im->step;
732 if (ft_step < im->gdes[i].step) {
733 reduce_data(im->gdes[i].cf_reduce,
734 ft_step,
735 &im->gdes[i].start,
736 &im->gdes[i].end,
737 &im->gdes[i].step,
738 &im->gdes[i].ds_cnt,
739 &im->gdes[i].data);
740 } else {
741 im->gdes[i].step = ft_step;
742 }
743 }
745 /* lets see if the required data source is really there */
746 for(ii=0;ii<(int)im->gdes[i].ds_cnt;ii++){
747 if(strcmp(im->gdes[i].ds_namv[ii],im->gdes[i].ds_nam) == 0){
748 im->gdes[i].ds=ii; }
749 }
750 if (im->gdes[i].ds== -1){
751 rrd_set_error("No DS called '%s' in '%s'",
752 im->gdes[i].ds_nam,im->gdes[i].rrd);
753 return -1;
754 }
756 }
757 return 0;
758 }
760 /* evaluate the expressions in the CDEF functions */
762 /*************************************************************
763 * CDEF stuff
764 *************************************************************/
766 long
767 find_var_wrapper(void *arg1, char *key)
768 {
769 return find_var((image_desc_t *) arg1, key);
770 }
772 /* find gdes containing var*/
773 long
774 find_var(image_desc_t *im, char *key){
775 long ii;
776 for(ii=0;ii<im->gdes_c-1;ii++){
777 if((im->gdes[ii].gf == GF_DEF
778 || im->gdes[ii].gf == GF_VDEF
779 || im->gdes[ii].gf == GF_CDEF)
780 && (strcmp(im->gdes[ii].vname,key) == 0)){
781 return ii;
782 }
783 }
784 return -1;
785 }
787 /* find the largest common denominator for all the numbers
788 in the 0 terminated num array */
789 long
790 lcd(long *num){
791 long rest;
792 int i;
793 for (i=0;num[i+1]!=0;i++){
794 do {
795 rest=num[i] % num[i+1];
796 num[i]=num[i+1]; num[i+1]=rest;
797 } while (rest!=0);
798 num[i+1] = num[i];
799 }
800 /* return i==0?num[i]:num[i-1]; */
801 return num[i];
802 }
804 /* run the rpn calculator on all the VDEF and CDEF arguments */
805 int
806 data_calc( image_desc_t *im){
808 int gdi;
809 int dataidx;
810 long *steparray, rpi;
811 int stepcnt;
812 time_t now;
813 rpnstack_t rpnstack;
815 rpnstack_init(&rpnstack);
817 for (gdi=0;gdi<im->gdes_c;gdi++){
818 /* Look for GF_VDEF and GF_CDEF in the same loop,
819 * so CDEFs can use VDEFs and vice versa
820 */
821 switch (im->gdes[gdi].gf) {
822 case GF_XPORT:
823 break;
824 case GF_SHIFT: {
825 graph_desc_t *vdp = &im->gdes[im->gdes[gdi].vidx];
827 /* remove current shift */
828 vdp->start -= vdp->shift;
829 vdp->end -= vdp->shift;
831 /* vdef */
832 if (im->gdes[gdi].shidx >= 0)
833 vdp->shift = im->gdes[im->gdes[gdi].shidx].vf.val;
834 /* constant */
835 else
836 vdp->shift = im->gdes[gdi].shval;
838 /* normalize shift to multiple of consolidated step */
839 vdp->shift = (vdp->shift / (long)vdp->step) * (long)vdp->step;
841 /* apply shift */
842 vdp->start += vdp->shift;
843 vdp->end += vdp->shift;
844 break;
845 }
846 case GF_VDEF:
847 /* A VDEF has no DS. This also signals other parts
848 * of rrdtool that this is a VDEF value, not a CDEF.
849 */
850 im->gdes[gdi].ds_cnt = 0;
851 if (vdef_calc(im,gdi)) {
852 rrd_set_error("Error processing VDEF '%s'"
853 ,im->gdes[gdi].vname
854 );
855 rpnstack_free(&rpnstack);
856 return -1;
857 }
858 break;
859 case GF_CDEF:
860 im->gdes[gdi].ds_cnt = 1;
861 im->gdes[gdi].ds = 0;
862 im->gdes[gdi].data_first = 1;
863 im->gdes[gdi].start = 0;
864 im->gdes[gdi].end = 0;
865 steparray=NULL;
866 stepcnt = 0;
867 dataidx=-1;
869 /* Find the variables in the expression.
870 * - VDEF variables are substituted by their values
871 * and the opcode is changed into OP_NUMBER.
872 * - CDEF variables are analized for their step size,
873 * the lowest common denominator of all the step
874 * sizes of the data sources involved is calculated
875 * and the resulting number is the step size for the
876 * resulting data source.
877 */
878 for(rpi=0;im->gdes[gdi].rpnp[rpi].op != OP_END;rpi++){
879 if(im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
880 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER){
881 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
882 if (im->gdes[ptr].ds_cnt == 0) {
883 #if 0
884 printf("DEBUG: inside CDEF '%s' processing VDEF '%s'\n",
885 im->gdes[gdi].vname,
886 im->gdes[ptr].vname);
887 printf("DEBUG: value from vdef is %f\n",im->gdes[ptr].vf.val);
888 #endif
889 im->gdes[gdi].rpnp[rpi].val = im->gdes[ptr].vf.val;
890 im->gdes[gdi].rpnp[rpi].op = OP_NUMBER;
891 } else {
892 if ((steparray =
893 rrd_realloc(steparray,
894 (++stepcnt+1)*sizeof(*steparray)))==NULL){
895 rrd_set_error("realloc steparray");
896 rpnstack_free(&rpnstack);
897 return -1;
898 };
900 steparray[stepcnt-1] = im->gdes[ptr].step;
902 /* adjust start and end of cdef (gdi) so
903 * that it runs from the latest start point
904 * to the earliest endpoint of any of the
905 * rras involved (ptr)
906 */
907 if(im->gdes[gdi].start < im->gdes[ptr].start)
908 im->gdes[gdi].start = im->gdes[ptr].start;
910 if(im->gdes[gdi].end == 0 ||
911 im->gdes[gdi].end > im->gdes[ptr].end)
912 im->gdes[gdi].end = im->gdes[ptr].end;
914 /* store pointer to the first element of
915 * the rra providing data for variable,
916 * further save step size and data source
917 * count of this rra
918 */
919 im->gdes[gdi].rpnp[rpi].data = im->gdes[ptr].data + im->gdes[ptr].ds;
920 im->gdes[gdi].rpnp[rpi].step = im->gdes[ptr].step;
921 im->gdes[gdi].rpnp[rpi].ds_cnt = im->gdes[ptr].ds_cnt;
923 /* backoff the *.data ptr; this is done so
924 * rpncalc() function doesn't have to treat
925 * the first case differently
926 */
927 } /* if ds_cnt != 0 */
928 } /* if OP_VARIABLE */
929 } /* loop through all rpi */
931 /* move the data pointers to the correct period */
932 for(rpi=0;im->gdes[gdi].rpnp[rpi].op != OP_END;rpi++){
933 if(im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
934 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER){
935 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
936 long diff = im->gdes[gdi].start - im->gdes[ptr].start;
938 if(diff > 0)
939 im->gdes[gdi].rpnp[rpi].data += (diff / im->gdes[ptr].step) * im->gdes[ptr].ds_cnt;
940 }
941 }
943 if(steparray == NULL){
944 rrd_set_error("rpn expressions without DEF"
945 " or CDEF variables are not supported");
946 rpnstack_free(&rpnstack);
947 return -1;
948 }
949 steparray[stepcnt]=0;
950 /* Now find the resulting step. All steps in all
951 * used RRAs have to be visited
952 */
953 im->gdes[gdi].step = lcd(steparray);
954 free(steparray);
955 if((im->gdes[gdi].data = malloc((
956 (im->gdes[gdi].end-im->gdes[gdi].start)
957 / im->gdes[gdi].step)
958 * sizeof(double)))==NULL){
959 rrd_set_error("malloc im->gdes[gdi].data");
960 rpnstack_free(&rpnstack);
961 return -1;
962 }
964 /* Step through the new cdef results array and
965 * calculate the values
966 */
967 for (now = im->gdes[gdi].start + im->gdes[gdi].step;
968 now<=im->gdes[gdi].end;
969 now += im->gdes[gdi].step)
970 {
971 rpnp_t *rpnp = im -> gdes[gdi].rpnp;
973 /* 3rd arg of rpn_calc is for OP_VARIABLE lookups;
974 * in this case we are advancing by timesteps;
975 * we use the fact that time_t is a synonym for long
976 */
977 if (rpn_calc(rpnp,&rpnstack,(long) now,
978 im->gdes[gdi].data,++dataidx) == -1) {
979 /* rpn_calc sets the error string */
980 rpnstack_free(&rpnstack);
981 return -1;
982 }
983 } /* enumerate over time steps within a CDEF */
984 break;
985 default:
986 continue;
987 }
988 } /* enumerate over CDEFs */
989 rpnstack_free(&rpnstack);
990 return 0;
991 }
993 /* massage data so, that we get one value for each x coordinate in the graph */
994 int
995 data_proc( image_desc_t *im ){
996 long i,ii;
997 double pixstep = (double)(im->end-im->start)
998 /(double)im->xsize; /* how much time
999 passes in one pixel */
1000 double paintval;
1001 double minval=DNAN,maxval=DNAN;
1003 unsigned long gr_time;
1005 /* memory for the processed data */
1006 for(i=0;i<im->gdes_c;i++) {
1007 if((im->gdes[i].gf==GF_LINE) ||
1008 (im->gdes[i].gf==GF_AREA) ||
1009 (im->gdes[i].gf==GF_TICK) ||
1010 (im->gdes[i].gf==GF_STACK)) {
1011 if((im->gdes[i].p_data = malloc((im->xsize +1)
1012 * sizeof(rrd_value_t)))==NULL){
1013 rrd_set_error("malloc data_proc");
1014 return -1;
1015 }
1016 }
1017 }
1019 for (i=0;i<im->xsize;i++) { /* for each pixel */
1020 long vidx;
1021 gr_time = im->start+pixstep*i; /* time of the current step */
1022 paintval=0.0;
1024 for (ii=0;ii<im->gdes_c;ii++) {
1025 double value;
1026 switch (im->gdes[ii].gf) {
1027 case GF_LINE:
1028 case GF_AREA:
1029 case GF_TICK:
1030 if (!im->gdes[ii].stack)
1031 paintval = 0.0;
1032 case GF_STACK:
1033 value = im->gdes[ii].yrule;
1034 if (isnan(value) || (im->gdes[ii].gf == GF_TICK)) {
1035 /* The time of the data doesn't necessarily match
1036 ** the time of the graph. Beware.
1037 */
1038 vidx = im->gdes[ii].vidx;
1039 if (im->gdes[vidx].gf == GF_VDEF) {
1040 value = im->gdes[vidx].vf.val;
1041 } else if (((long int)gr_time >= (long int)im->gdes[vidx].start) &&
1042 ((long int)gr_time <= (long int)im->gdes[vidx].end) ) {
1043 value = im->gdes[vidx].data[
1044 (unsigned long) floor(
1045 (double)(gr_time - im->gdes[vidx].start)
1046 / im->gdes[vidx].step)
1047 * im->gdes[vidx].ds_cnt
1048 + im->gdes[vidx].ds
1049 ];
1050 } else {
1051 value = DNAN;
1052 }
1053 };
1055 if (! isnan(value)) {
1056 paintval += value;
1057 im->gdes[ii].p_data[i] = paintval;
1058 /* GF_TICK: the data values are not
1059 ** relevant for min and max
1060 */
1061 if (finite(paintval) && im->gdes[ii].gf != GF_TICK ) {
1062 if (isnan(minval) || paintval < minval)
1063 minval = paintval;
1064 if (isnan(maxval) || paintval > maxval)
1065 maxval = paintval;
1066 }
1067 } else {
1068 im->gdes[ii].p_data[i] = DNAN;
1069 }
1070 break;
1071 default:
1072 break;
1073 }
1074 }
1075 }
1077 /* if min or max have not been asigned a value this is because
1078 there was no data in the graph ... this is not good ...
1079 lets set these to dummy values then ... */
1081 if (isnan(minval)) minval = 0.0;
1082 if (isnan(maxval)) maxval = 1.0;
1084 /* adjust min and max values */
1085 if (isnan(im->minval)
1086 /* don't adjust low-end with log scale */
1087 || ((!im->logarithmic && !im->rigid) && im->minval > minval)
1088 )
1089 im->minval = minval;
1090 if (isnan(im->maxval)
1091 || (!im->rigid && im->maxval < maxval)
1092 ) {
1093 if (im->logarithmic)
1094 im->maxval = maxval * 1.1;
1095 else
1096 im->maxval = maxval;
1097 }
1098 /* make sure min is smaller than max */
1099 if (im->minval > im->maxval) {
1100 im->minval = 0.99 * im->maxval;
1101 }
1103 /* make sure min and max are not equal */
1104 if (im->minval == im->maxval) {
1105 im->maxval *= 1.01;
1106 if (! im->logarithmic) {
1107 im->minval *= 0.99;
1108 }
1109 /* make sure min and max are not both zero */
1110 if (im->maxval == 0.0) {
1111 im->maxval = 1.0;
1112 }
1113 }
1114 return 0;
1115 }
1119 /* identify the point where the first gridline, label ... gets placed */
1121 time_t
1122 find_first_time(
1123 time_t start, /* what is the initial time */
1124 enum tmt_en baseint, /* what is the basic interval */
1125 long basestep /* how many if these do we jump a time */
1126 )
1127 {
1128 struct tm tm;
1129 localtime_r(&start, &tm);
1130 switch(baseint){
1131 case TMT_SECOND:
1132 tm.tm_sec -= tm.tm_sec % basestep; break;
1133 case TMT_MINUTE:
1134 tm.tm_sec=0;
1135 tm.tm_min -= tm.tm_min % basestep;
1136 break;
1137 case TMT_HOUR:
1138 tm.tm_sec=0;
1139 tm.tm_min = 0;
1140 tm.tm_hour -= tm.tm_hour % basestep; break;
1141 case TMT_DAY:
1142 /* we do NOT look at the basestep for this ... */
1143 tm.tm_sec=0;
1144 tm.tm_min = 0;
1145 tm.tm_hour = 0; break;
1146 case TMT_WEEK:
1147 /* we do NOT look at the basestep for this ... */
1148 tm.tm_sec=0;
1149 tm.tm_min = 0;
1150 tm.tm_hour = 0;
1151 tm.tm_mday -= tm.tm_wday -1; /* -1 because we want the monday */
1152 if (tm.tm_wday==0) tm.tm_mday -= 7; /* we want the *previous* monday */
1153 break;
1154 case TMT_MONTH:
1155 tm.tm_sec=0;
1156 tm.tm_min = 0;
1157 tm.tm_hour = 0;
1158 tm.tm_mday = 1;
1159 tm.tm_mon -= tm.tm_mon % basestep; break;
1161 case TMT_YEAR:
1162 tm.tm_sec=0;
1163 tm.tm_min = 0;
1164 tm.tm_hour = 0;
1165 tm.tm_mday = 1;
1166 tm.tm_mon = 0;
1167 tm.tm_year -= (tm.tm_year+1900) % basestep;
1169 }
1170 return mktime(&tm);
1171 }
1172 /* identify the point where the next gridline, label ... gets placed */
1173 time_t
1174 find_next_time(
1175 time_t current, /* what is the initial time */
1176 enum tmt_en baseint, /* what is the basic interval */
1177 long basestep /* how many if these do we jump a time */
1178 )
1179 {
1180 struct tm tm;
1181 time_t madetime;
1182 localtime_r(¤t, &tm);
1183 do {
1184 switch(baseint){
1185 case TMT_SECOND:
1186 tm.tm_sec += basestep; break;
1187 case TMT_MINUTE:
1188 tm.tm_min += basestep; break;
1189 case TMT_HOUR:
1190 tm.tm_hour += basestep; break;
1191 case TMT_DAY:
1192 tm.tm_mday += basestep; break;
1193 case TMT_WEEK:
1194 tm.tm_mday += 7*basestep; break;
1195 case TMT_MONTH:
1196 tm.tm_mon += basestep; break;
1197 case TMT_YEAR:
1198 tm.tm_year += basestep;
1199 }
1200 madetime = mktime(&tm);
1201 } while (madetime == -1); /* this is necessary to skip impssible times
1202 like the daylight saving time skips */
1203 return madetime;
1205 }
1208 /* calculate values required for PRINT and GPRINT functions */
1210 int
1211 print_calc(image_desc_t *im, char ***prdata)
1212 {
1213 long i,ii,validsteps;
1214 double printval;
1215 time_t printtime;
1216 int graphelement = 0;
1217 long vidx;
1218 int max_ii;
1219 double magfact = -1;
1220 char *si_symb = "";
1221 char *percent_s;
1222 int prlines = 1;
1223 if (im->imginfo) prlines++;
1224 for(i=0;i<im->gdes_c;i++){
1225 switch(im->gdes[i].gf){
1226 case GF_PRINT:
1227 prlines++;
1228 if(((*prdata) = rrd_realloc((*prdata),prlines*sizeof(char *)))==NULL){
1229 rrd_set_error("realloc prdata");
1230 return 0;
1231 }
1232 case GF_GPRINT:
1233 /* PRINT and GPRINT can now print VDEF generated values.
1234 * There's no need to do any calculations on them as these
1235 * calculations were already made.
1236 */
1237 vidx = im->gdes[i].vidx;
1238 if (im->gdes[vidx].gf==GF_VDEF) { /* simply use vals */
1239 printval = im->gdes[vidx].vf.val;
1240 printtime = im->gdes[vidx].vf.when;
1241 } else { /* need to calculate max,min,avg etcetera */
1242 max_ii =((im->gdes[vidx].end
1243 - im->gdes[vidx].start)
1244 / im->gdes[vidx].step
1245 * im->gdes[vidx].ds_cnt);
1246 printval = DNAN;
1247 validsteps = 0;
1248 for( ii=im->gdes[vidx].ds;
1249 ii < max_ii;
1250 ii+=im->gdes[vidx].ds_cnt){
1251 if (! finite(im->gdes[vidx].data[ii]))
1252 continue;
1253 if (isnan(printval)){
1254 printval = im->gdes[vidx].data[ii];
1255 validsteps++;
1256 continue;
1257 }
1259 switch (im->gdes[i].cf){
1260 case CF_HWPREDICT:
1261 case CF_DEVPREDICT:
1262 case CF_DEVSEASONAL:
1263 case CF_SEASONAL:
1264 case CF_AVERAGE:
1265 validsteps++;
1266 printval += im->gdes[vidx].data[ii];
1267 break;
1268 case CF_MINIMUM:
1269 printval = min( printval, im->gdes[vidx].data[ii]);
1270 break;
1271 case CF_FAILURES:
1272 case CF_MAXIMUM:
1273 printval = max( printval, im->gdes[vidx].data[ii]);
1274 break;
1275 case CF_LAST:
1276 printval = im->gdes[vidx].data[ii];
1277 }
1278 }
1279 if (im->gdes[i].cf==CF_AVERAGE || im->gdes[i].cf > CF_LAST) {
1280 if (validsteps > 1) {
1281 printval = (printval / validsteps);
1282 }
1283 }
1284 } /* prepare printval */
1286 if (!strcmp(im->gdes[i].format,"%c")) { /* VDEF time print */
1287 char ctime_buf[128]; /* PS: for ctime_r, must be >= 26 chars */
1288 if (im->gdes[i].gf == GF_PRINT){
1289 (*prdata)[prlines-2] = malloc((FMT_LEG_LEN+2)*sizeof(char));
1290 sprintf((*prdata)[prlines-2],"%s (%lu)",
1291 ctime_r(&printtime,ctime_buf),printtime);
1292 (*prdata)[prlines-1] = NULL;
1293 } else {
1294 sprintf(im->gdes[i].legend,"%s (%lu)",
1295 ctime_r(&printtime,ctime_buf),printtime);
1296 graphelement = 1;
1297 }
1298 } else {
1299 if ((percent_s = strstr(im->gdes[i].format,"%S")) != NULL) {
1300 /* Magfact is set to -1 upon entry to print_calc. If it
1301 * is still less than 0, then we need to run auto_scale.
1302 * Otherwise, put the value into the correct units. If
1303 * the value is 0, then do not set the symbol or magnification
1304 * so next the calculation will be performed again. */
1305 if (magfact < 0.0) {
1306 auto_scale(im,&printval,&si_symb,&magfact);
1307 if (printval == 0.0)
1308 magfact = -1.0;
1309 } else {
1310 printval /= magfact;
1311 }
1312 *(++percent_s) = 's';
1313 } else if (strstr(im->gdes[i].format,"%s") != NULL) {
1314 auto_scale(im,&printval,&si_symb,&magfact);
1315 }
1317 if (im->gdes[i].gf == GF_PRINT){
1318 (*prdata)[prlines-2] = malloc((FMT_LEG_LEN+2)*sizeof(char));
1319 (*prdata)[prlines-1] = NULL;
1320 if (bad_format(im->gdes[i].format)) {
1321 rrd_set_error("bad format for PRINT in '%s'", im->gdes[i].format);
1322 return -1;
1323 }
1324 #ifdef HAVE_SNPRINTF
1325 snprintf((*prdata)[prlines-2],FMT_LEG_LEN,im->gdes[i].format,printval,si_symb);
1326 #else
1327 sprintf((*prdata)[prlines-2],im->gdes[i].format,printval,si_symb);
1328 #endif
1329 } else {
1330 /* GF_GPRINT */
1332 if (bad_format(im->gdes[i].format)) {
1333 rrd_set_error("bad format for GPRINT in '%s'", im->gdes[i].format);
1334 return -1;
1335 }
1336 #ifdef HAVE_SNPRINTF
1337 snprintf(im->gdes[i].legend,FMT_LEG_LEN-2,im->gdes[i].format,printval,si_symb);
1338 #else
1339 sprintf(im->gdes[i].legend,im->gdes[i].format,printval,si_symb);
1340 #endif
1341 graphelement = 1;
1342 }
1343 }
1344 break;
1345 case GF_LINE:
1346 case GF_AREA:
1347 case GF_TICK:
1348 case GF_STACK:
1349 case GF_HRULE:
1350 case GF_VRULE:
1351 graphelement = 1;
1352 break;
1353 case GF_COMMENT:
1354 case GF_DEF:
1355 case GF_CDEF:
1356 case GF_VDEF:
1357 #ifdef WITH_PIECHART
1358 case GF_PART:
1359 #endif
1360 case GF_SHIFT:
1361 case GF_XPORT:
1362 break;
1363 }
1364 }
1365 return graphelement;
1366 }
1369 /* place legends with color spots */
1370 int
1371 leg_place(image_desc_t *im)
1372 {
1373 /* graph labels */
1374 int interleg = im->text_prop[TEXT_PROP_LEGEND].size*2.0;
1375 int border = im->text_prop[TEXT_PROP_LEGEND].size*2.0;
1376 int fill=0, fill_last;
1377 int leg_c = 0;
1378 int leg_x = border, leg_y = im->yimg;
1379 int leg_cc;
1380 int glue = 0;
1381 int i,ii, mark = 0;
1382 char prt_fctn; /*special printfunctions */
1383 int *legspace;
1385 if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
1386 if ((legspace = malloc(im->gdes_c*sizeof(int)))==NULL){
1387 rrd_set_error("malloc for legspace");
1388 return -1;
1389 }
1391 for(i=0;i<im->gdes_c;i++){
1392 fill_last = fill;
1394 /* hid legends for rules which are not displayed */
1396 if(!(im->extra_flags & FORCE_RULES_LEGEND)) {
1397 if (im->gdes[i].gf == GF_HRULE &&
1398 (im->gdes[i].yrule < im->minval || im->gdes[i].yrule > im->maxval))
1399 im->gdes[i].legend[0] = '\0';
1401 if (im->gdes[i].gf == GF_VRULE &&
1402 (im->gdes[i].xrule < im->start || im->gdes[i].xrule > im->end))
1403 im->gdes[i].legend[0] = '\0';
1404 }
1406 leg_cc = strlen(im->gdes[i].legend);
1408 /* is there a controle code ant the end of the legend string ? */
1409 /* and it is not a tab \\t */
1410 if (leg_cc >= 2 && im->gdes[i].legend[leg_cc-2] == '\\' && im->gdes[i].legend[leg_cc-1] != 't') {
1411 prt_fctn = im->gdes[i].legend[leg_cc-1];
1412 leg_cc -= 2;
1413 im->gdes[i].legend[leg_cc] = '\0';
1414 } else {
1415 prt_fctn = '\0';
1416 }
1417 /* remove exess space */
1418 while (prt_fctn=='g' &&
1419 leg_cc > 0 &&
1420 im->gdes[i].legend[leg_cc-1]==' '){
1421 leg_cc--;
1422 im->gdes[i].legend[leg_cc]='\0';
1423 }
1424 if (leg_cc != 0 ){
1425 legspace[i]=(prt_fctn=='g' ? 0 : interleg);
1427 if (fill > 0){
1428 /* no interleg space if string ends in \g */
1429 fill += legspace[i];
1430 }
1431 fill += gfx_get_text_width(im->canvas, fill+border,
1432 im->text_prop[TEXT_PROP_LEGEND].font,
1433 im->text_prop[TEXT_PROP_LEGEND].size,
1434 im->tabwidth,
1435 im->gdes[i].legend, 0);
1436 leg_c++;
1437 } else {
1438 legspace[i]=0;
1439 }
1440 /* who said there was a special tag ... ?*/
1441 if (prt_fctn=='g') {
1442 prt_fctn = '\0';
1443 }
1444 if (prt_fctn == '\0') {
1445 if (i == im->gdes_c -1 ) prt_fctn ='l';
1447 /* is it time to place the legends ? */
1448 if (fill > im->ximg - 2*border){
1449 if (leg_c > 1) {
1450 /* go back one */
1451 i--;
1452 fill = fill_last;
1453 leg_c--;
1454 prt_fctn = 'j';
1455 } else {
1456 prt_fctn = 'l';
1457 }
1459 }
1460 }
1463 if (prt_fctn != '\0'){
1464 leg_x = border;
1465 if (leg_c >= 2 && prt_fctn == 'j') {
1466 glue = (im->ximg - fill - 2* border) / (leg_c-1);
1467 } else {
1468 glue = 0;
1469 }
1470 if (prt_fctn =='c') leg_x = (im->ximg - fill) / 2.0;
1471 if (prt_fctn =='r') leg_x = im->ximg - fill - border;
1473 for(ii=mark;ii<=i;ii++){
1474 if(im->gdes[ii].legend[0]=='\0')
1475 continue; /* skip empty legends */
1476 im->gdes[ii].leg_x = leg_x;
1477 im->gdes[ii].leg_y = leg_y;
1478 leg_x +=
1479 gfx_get_text_width(im->canvas, leg_x,
1480 im->text_prop[TEXT_PROP_LEGEND].font,
1481 im->text_prop[TEXT_PROP_LEGEND].size,
1482 im->tabwidth,
1483 im->gdes[ii].legend, 0)
1484 + legspace[ii]
1485 + glue;
1486 }
1487 leg_y += im->text_prop[TEXT_PROP_LEGEND].size*1.7;
1488 if (prt_fctn == 's') leg_y -= im->text_prop[TEXT_PROP_LEGEND].size;
1489 fill = 0;
1490 leg_c = 0;
1491 mark = ii;
1492 }
1493 }
1494 im->yimg = leg_y;
1495 free(legspace);
1496 }
1497 return 0;
1498 }
1500 /* create a grid on the graph. it determines what to do
1501 from the values of xsize, start and end */
1503 /* the xaxis labels are determined from the number of seconds per pixel
1504 in the requested graph */
1508 int
1509 calc_horizontal_grid(image_desc_t *im)
1510 {
1511 double range;
1512 double scaledrange;
1513 int pixel,i;
1514 int gridind;
1515 int decimals, fractionals;
1517 im->ygrid_scale.labfact=2;
1518 gridind=-1;
1519 range = im->maxval - im->minval;
1520 scaledrange = range / im->magfact;
1522 /* does the scale of this graph make it impossible to put lines
1523 on it? If so, give up. */
1524 if (isnan(scaledrange)) {
1525 return 0;
1526 }
1528 /* find grid spaceing */
1529 pixel=1;
1530 if(isnan(im->ygridstep)){
1531 if(im->extra_flags & ALTYGRID) {
1532 /* find the value with max number of digits. Get number of digits */
1533 decimals = ceil(log10(max(fabs(im->maxval), fabs(im->minval))));
1534 if(decimals <= 0) /* everything is small. make place for zero */
1535 decimals = 1;
1537 fractionals = floor(log10(range));
1538 if(fractionals < 0) /* small amplitude. */
1539 sprintf(im->ygrid_scale.labfmt, "%%%d.%df", decimals - fractionals + 1, -fractionals + 1);
1540 else
1541 sprintf(im->ygrid_scale.labfmt, "%%%d.1f", decimals + 1);
1542 im->ygrid_scale.gridstep = pow((double)10, (double)fractionals);
1543 if(im->ygrid_scale.gridstep == 0) /* range is one -> 0.1 is reasonable scale */
1544 im->ygrid_scale.gridstep = 0.1;
1545 /* should have at least 5 lines but no more then 15 */
1546 if(range/im->ygrid_scale.gridstep < 5)
1547 im->ygrid_scale.gridstep /= 10;
1548 if(range/im->ygrid_scale.gridstep > 15)
1549 im->ygrid_scale.gridstep *= 10;
1550 if(range/im->ygrid_scale.gridstep > 5) {
1551 im->ygrid_scale.labfact = 1;
1552 if(range/im->ygrid_scale.gridstep > 8)
1553 im->ygrid_scale.labfact = 2;
1554 }
1555 else {
1556 im->ygrid_scale.gridstep /= 5;
1557 im->ygrid_scale.labfact = 5;
1558 }
1559 }
1560 else {
1561 for(i=0;ylab[i].grid > 0;i++){
1562 pixel = im->ysize / (scaledrange / ylab[i].grid);
1563 if (gridind == -1 && pixel > 5) {
1564 gridind = i;
1565 break;
1566 }
1567 }
1569 for(i=0; i<4;i++) {
1570 if (pixel * ylab[gridind].lfac[i] >= 2 * im->text_prop[TEXT_PROP_AXIS].size) {
1571 im->ygrid_scale.labfact = ylab[gridind].lfac[i];
1572 break;
1573 }
1574 }
1576 im->ygrid_scale.gridstep = ylab[gridind].grid * im->magfact;
1577 }
1578 } else {
1579 im->ygrid_scale.gridstep = im->ygridstep;
1580 im->ygrid_scale.labfact = im->ylabfact;
1581 }
1582 return 1;
1583 }
1585 int draw_horizontal_grid(image_desc_t *im)
1586 {
1587 int i;
1588 double scaledstep;
1589 char graph_label[100];
1590 double X0=im->xorigin;
1591 double X1=im->xorigin+im->xsize;
1593 int sgrid = (int)( im->minval / im->ygrid_scale.gridstep - 1);
1594 int egrid = (int)( im->maxval / im->ygrid_scale.gridstep + 1);
1595 scaledstep = im->ygrid_scale.gridstep/im->magfact;
1596 for (i = sgrid; i <= egrid; i++){
1597 double Y0=ytr(im,im->ygrid_scale.gridstep*i);
1598 if ( Y0 >= im->yorigin-im->ysize
1599 && Y0 <= im->yorigin){
1600 if(i % im->ygrid_scale.labfact == 0){
1601 if (i==0 || im->symbol == ' ') {
1602 if(scaledstep < 1){
1603 if(im->extra_flags & ALTYGRID) {
1604 sprintf(graph_label,im->ygrid_scale.labfmt,scaledstep*i);
1605 }
1606 else {
1607 sprintf(graph_label,"%4.1f",scaledstep*i);
1608 }
1609 } else {
1610 sprintf(graph_label,"%4.0f",scaledstep*i);
1611 }
1612 }else {
1613 if(scaledstep < 1){
1614 sprintf(graph_label,"%4.1f %c",scaledstep*i, im->symbol);
1615 } else {
1616 sprintf(graph_label,"%4.0f %c",scaledstep*i, im->symbol);
1617 }
1618 }
1620 gfx_new_text ( im->canvas,
1621 X0-im->text_prop[TEXT_PROP_AXIS].size/1.5, Y0,
1622 im->graph_col[GRC_FONT],
1623 im->text_prop[TEXT_PROP_AXIS].font,
1624 im->text_prop[TEXT_PROP_AXIS].size,
1625 im->tabwidth, 0.0, GFX_H_RIGHT, GFX_V_CENTER,
1626 graph_label );
1627 gfx_new_dashed_line ( im->canvas,
1628 X0-2,Y0,
1629 X1+2,Y0,
1630 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1631 im->grid_dash_on, im->grid_dash_off);
1633 } else if (!(im->extra_flags & NOMINOR)) {
1634 gfx_new_dashed_line ( im->canvas,
1635 X0-1,Y0,
1636 X1+1,Y0,
1637 GRIDWIDTH, im->graph_col[GRC_GRID],
1638 im->grid_dash_on, im->grid_dash_off);
1640 }
1641 }
1642 }
1643 return 1;
1644 }
1646 /* logaritmic horizontal grid */
1647 int
1648 horizontal_log_grid(image_desc_t *im)
1649 {
1650 double pixpex;
1651 int ii,i;
1652 int minoridx=0, majoridx=0;
1653 char graph_label[100];
1654 double X0,X1,Y0;
1655 double value, pixperstep, minstep;
1657 /* find grid spaceing */
1658 pixpex= (double)im->ysize / (log10(im->maxval) - log10(im->minval));
1660 if (isnan(pixpex)) {
1661 return 0;
1662 }
1664 for(i=0;yloglab[i][0] > 0;i++){
1665 minstep = log10(yloglab[i][0]);
1666 for(ii=1;yloglab[i][ii+1] > 0;ii++){
1667 if(yloglab[i][ii+2]==0){
1668 minstep = log10(yloglab[i][ii+1])-log10(yloglab[i][ii]);
1669 break;
1670 }
1671 }
1672 pixperstep = pixpex * minstep;
1673 if(pixperstep > 5){minoridx = i;}
1674 if(pixperstep > 2 * im->text_prop[TEXT_PROP_LEGEND].size){majoridx = i;}
1675 }
1677 X0=im->xorigin;
1678 X1=im->xorigin+im->xsize;
1679 /* paint minor grid */
1680 for (value = pow((double)10, log10(im->minval)
1681 - fmod(log10(im->minval),log10(yloglab[minoridx][0])));
1682 value <= im->maxval;
1683 value *= yloglab[minoridx][0]){
1684 if (value < im->minval) continue;
1685 i=0;
1686 while(yloglab[minoridx][++i] > 0){
1687 Y0 = ytr(im,value * yloglab[minoridx][i]);
1688 if (Y0 <= im->yorigin - im->ysize) break;
1689 gfx_new_dashed_line ( im->canvas,
1690 X0-1,Y0,
1691 X1+1,Y0,
1692 GRIDWIDTH, im->graph_col[GRC_GRID],
1693 im->grid_dash_on, im->grid_dash_off);
1694 }
1695 }
1697 /* paint major grid and labels*/
1698 for (value = pow((double)10, log10(im->minval)
1699 - fmod(log10(im->minval),log10(yloglab[majoridx][0])));
1700 value <= im->maxval;
1701 value *= yloglab[majoridx][0]){
1702 if (value < im->minval) continue;
1703 i=0;
1704 while(yloglab[majoridx][++i] > 0){
1705 Y0 = ytr(im,value * yloglab[majoridx][i]);
1706 if (Y0 <= im->yorigin - im->ysize) break;
1707 gfx_new_dashed_line ( im->canvas,
1708 X0-2,Y0,
1709 X1+2,Y0,
1710 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1711 im->grid_dash_on, im->grid_dash_off);
1713 sprintf(graph_label,"%3.0e",value * yloglab[majoridx][i]);
1714 gfx_new_text ( im->canvas,
1715 X0-im->text_prop[TEXT_PROP_AXIS].size/1.5, Y0,
1716 im->graph_col[GRC_FONT],
1717 im->text_prop[TEXT_PROP_AXIS].font,
1718 im->text_prop[TEXT_PROP_AXIS].size,
1719 im->tabwidth,0.0, GFX_H_RIGHT, GFX_V_CENTER,
1720 graph_label );
1721 }
1722 }
1723 return 1;
1724 }
1727 void
1728 vertical_grid(
1729 image_desc_t *im )
1730 {
1731 int xlab_sel; /* which sort of label and grid ? */
1732 time_t ti, tilab, timajor;
1733 long factor;
1734 char graph_label[100];
1735 double X0,Y0,Y1; /* points for filled graph and more*/
1736 struct tm tm;
1738 /* the type of time grid is determined by finding
1739 the number of seconds per pixel in the graph */
1742 if(im->xlab_user.minsec == -1){
1743 factor=(im->end - im->start)/im->xsize;
1744 xlab_sel=0;
1745 while ( xlab[xlab_sel+1].minsec != -1
1746 && xlab[xlab_sel+1].minsec <= factor){ xlab_sel++; }
1747 im->xlab_user.gridtm = xlab[xlab_sel].gridtm;
1748 im->xlab_user.gridst = xlab[xlab_sel].gridst;
1749 im->xlab_user.mgridtm = xlab[xlab_sel].mgridtm;
1750 im->xlab_user.mgridst = xlab[xlab_sel].mgridst;
1751 im->xlab_user.labtm = xlab[xlab_sel].labtm;
1752 im->xlab_user.labst = xlab[xlab_sel].labst;
1753 im->xlab_user.precis = xlab[xlab_sel].precis;
1754 im->xlab_user.stst = xlab[xlab_sel].stst;
1755 }
1757 /* y coords are the same for every line ... */
1758 Y0 = im->yorigin;
1759 Y1 = im->yorigin-im->ysize;
1762 /* paint the minor grid */
1763 if (!(im->extra_flags & NOMINOR))
1764 {
1765 for(ti = find_first_time(im->start,
1766 im->xlab_user.gridtm,
1767 im->xlab_user.gridst),
1768 timajor = find_first_time(im->start,
1769 im->xlab_user.mgridtm,
1770 im->xlab_user.mgridst);
1771 ti < im->end;
1772 ti = find_next_time(ti,im->xlab_user.gridtm,im->xlab_user.gridst)
1773 ){
1774 /* are we inside the graph ? */
1775 if (ti < im->start || ti > im->end) continue;
1776 while (timajor < ti) {
1777 timajor = find_next_time(timajor,
1778 im->xlab_user.mgridtm, im->xlab_user.mgridst);
1779 }
1780 if (ti == timajor) continue; /* skip as falls on major grid line */
1781 X0 = xtr(im,ti);
1782 gfx_new_dashed_line(im->canvas,X0,Y0+1, X0,Y1-1,GRIDWIDTH,
1783 im->graph_col[GRC_GRID],
1784 im->grid_dash_on, im->grid_dash_off);
1786 }
1787 }
1789 /* paint the major grid */
1790 for(ti = find_first_time(im->start,
1791 im->xlab_user.mgridtm,
1792 im->xlab_user.mgridst);
1793 ti < im->end;
1794 ti = find_next_time(ti,im->xlab_user.mgridtm,im->xlab_user.mgridst)
1795 ){
1796 /* are we inside the graph ? */
1797 if (ti < im->start || ti > im->end) continue;
1798 X0 = xtr(im,ti);
1799 gfx_new_dashed_line(im->canvas,X0,Y0+3, X0,Y1-2,MGRIDWIDTH,
1800 im->graph_col[GRC_MGRID],
1801 im->grid_dash_on, im->grid_dash_off);
1803 }
1804 /* paint the labels below the graph */
1805 for(ti = find_first_time(im->start - im->xlab_user.precis/2,
1806 im->xlab_user.labtm,
1807 im->xlab_user.labst);
1808 ti <= im->end - im->xlab_user.precis/2;
1809 ti = find_next_time(ti,im->xlab_user.labtm,im->xlab_user.labst)
1810 ){
1811 tilab= ti + im->xlab_user.precis/2; /* correct time for the label */
1812 /* are we inside the graph ? */
1813 if (tilab < im->start || tilab > im->end) continue;
1815 #if HAVE_STRFTIME
1816 localtime_r(&tilab, &tm);
1817 strftime(graph_label,99,im->xlab_user.stst, &tm);
1818 #else
1819 # error "your libc has no strftime I guess we'll abort the exercise here."
1820 #endif
1821 gfx_new_text ( im->canvas,
1822 xtr(im,tilab), Y0+im->text_prop[TEXT_PROP_AXIS].size/1.5,
1823 im->graph_col[GRC_FONT],
1824 im->text_prop[TEXT_PROP_AXIS].font,
1825 im->text_prop[TEXT_PROP_AXIS].size,
1826 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_TOP,
1827 graph_label );
1829 }
1831 }
1834 void
1835 axis_paint(
1836 image_desc_t *im
1837 )
1838 {
1839 /* draw x and y axis */
1840 /* gfx_new_line ( im->canvas, im->xorigin+im->xsize,im->yorigin,
1841 im->xorigin+im->xsize,im->yorigin-im->ysize,
1842 GRIDWIDTH, im->graph_col[GRC_AXIS]);
1844 gfx_new_line ( im->canvas, im->xorigin,im->yorigin-im->ysize,
1845 im->xorigin+im->xsize,im->yorigin-im->ysize,
1846 GRIDWIDTH, im->graph_col[GRC_AXIS]); */
1848 gfx_new_line ( im->canvas, im->xorigin-4,im->yorigin,
1849 im->xorigin+im->xsize+4,im->yorigin,
1850 MGRIDWIDTH, im->graph_col[GRC_AXIS]);
1852 gfx_new_line ( im->canvas, im->xorigin,im->yorigin+4,
1853 im->xorigin,im->yorigin-im->ysize-4,
1854 MGRIDWIDTH, im->graph_col[GRC_AXIS]);
1857 /* arrow for X axis direction */
1858 gfx_new_area ( im->canvas,
1859 im->xorigin+im->xsize+3, im->yorigin-3,
1860 im->xorigin+im->xsize+3, im->yorigin+4,
1861 im->xorigin+im->xsize+8, im->yorigin+0.5, /* LINEOFFSET */
1862 im->graph_col[GRC_ARROW]);
1864 }
1866 void
1867 grid_paint(image_desc_t *im)
1868 {
1869 long i;
1870 int res=0;
1871 double X0,Y0; /* points for filled graph and more*/
1872 gfx_node_t *node;
1874 /* draw 3d border */
1875 node = gfx_new_area (im->canvas, 0,im->yimg,
1876 2,im->yimg-2,
1877 2,2,im->graph_col[GRC_SHADEA]);
1878 gfx_add_point( node , im->ximg - 2, 2 );
1879 gfx_add_point( node , im->ximg, 0 );
1880 gfx_add_point( node , 0,0 );
1881 /* gfx_add_point( node , 0,im->yimg ); */
1883 node = gfx_new_area (im->canvas, 2,im->yimg-2,
1884 im->ximg-2,im->yimg-2,
1885 im->ximg - 2, 2,
1886 im->graph_col[GRC_SHADEB]);
1887 gfx_add_point( node , im->ximg,0);
1888 gfx_add_point( node , im->ximg,im->yimg);
1889 gfx_add_point( node , 0,im->yimg);
1890 /* gfx_add_point( node , 0,im->yimg ); */
1893 if (im->draw_x_grid == 1 )
1894 vertical_grid(im);
1896 if (im->draw_y_grid == 1){
1897 if(im->logarithmic){
1898 res = horizontal_log_grid(im);
1899 } else {
1900 res = draw_horizontal_grid(im);
1901 }
1903 /* dont draw horizontal grid if there is no min and max val */
1904 if (! res ) {
1905 char *nodata = "No Data found";
1906 gfx_new_text(im->canvas,im->ximg/2, (2*im->yorigin-im->ysize) / 2,
1907 im->graph_col[GRC_FONT],
1908 im->text_prop[TEXT_PROP_AXIS].font,
1909 im->text_prop[TEXT_PROP_AXIS].size,
1910 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_CENTER,
1911 nodata );
1912 }
1913 }
1915 /* yaxis unit description */
1916 gfx_new_text( im->canvas,
1917 7, (im->yorigin - im->ysize/2),
1918 im->graph_col[GRC_FONT],
1919 im->text_prop[TEXT_PROP_UNIT].font,
1920 im->text_prop[TEXT_PROP_UNIT].size, im->tabwidth,
1921 RRDGRAPH_YLEGEND_ANGLE,
1922 GFX_H_LEFT, GFX_V_CENTER,
1923 im->ylegend);
1925 /* graph title */
1926 gfx_new_text( im->canvas,
1927 im->ximg/2, im->text_prop[TEXT_PROP_TITLE].size*1.2,
1928 im->graph_col[GRC_FONT],
1929 im->text_prop[TEXT_PROP_TITLE].font,
1930 im->text_prop[TEXT_PROP_TITLE].size, im->tabwidth, 0.0,
1931 GFX_H_CENTER, GFX_V_CENTER,
1932 im->title);
1934 /* graph labels */
1935 if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
1936 for(i=0;i<im->gdes_c;i++){
1937 if(im->gdes[i].legend[0] =='\0')
1938 continue;
1940 /* im->gdes[i].leg_y is the bottom of the legend */
1941 X0 = im->gdes[i].leg_x;
1942 Y0 = im->gdes[i].leg_y;
1943 gfx_new_text ( im->canvas, X0, Y0,
1944 im->graph_col[GRC_FONT],
1945 im->text_prop[TEXT_PROP_LEGEND].font,
1946 im->text_prop[TEXT_PROP_LEGEND].size,
1947 im->tabwidth,0.0, GFX_H_LEFT, GFX_V_BOTTOM,
1948 im->gdes[i].legend );
1949 /* The legend for GRAPH items starts with "M " to have
1950 enough space for the box */
1951 if ( im->gdes[i].gf != GF_PRINT &&
1952 im->gdes[i].gf != GF_GPRINT &&
1953 im->gdes[i].gf != GF_COMMENT) {
1954 int boxH, boxV;
1956 boxH = gfx_get_text_width(im->canvas, 0,
1957 im->text_prop[TEXT_PROP_LEGEND].font,
1958 im->text_prop[TEXT_PROP_LEGEND].size,
1959 im->tabwidth,"M", 0)*1.2;
1960 boxV = boxH;
1962 /* make sure transparent colors show up all the same */
1963 node = gfx_new_area(im->canvas,
1964 X0,Y0-boxV,
1965 X0,Y0,
1966 X0+boxH,Y0,
1967 im->graph_col[GRC_CANVAS]);
1968 gfx_add_point ( node, X0+boxH, Y0-boxV );
1970 node = gfx_new_area(im->canvas,
1971 X0,Y0-boxV,
1972 X0,Y0,
1973 X0+boxH,Y0,
1974 im->gdes[i].col);
1975 gfx_add_point ( node, X0+boxH, Y0-boxV );
1976 node = gfx_new_line(im->canvas,
1977 X0,Y0-boxV, X0,Y0,
1978 1,im->graph_col[GRC_FONT]);
1979 gfx_add_point(node,X0+boxH,Y0);
1980 gfx_add_point(node,X0+boxH,Y0-boxV);
1981 gfx_close_path(node);
1982 }
1983 }
1984 }
1985 }
1988 /*****************************************************
1989 * lazy check make sure we rely need to create this graph
1990 *****************************************************/
1992 int lazy_check(image_desc_t *im){
1993 FILE *fd = NULL;
1994 int size = 1;
1995 struct stat imgstat;
1997 if (im->lazy == 0) return 0; /* no lazy option */
1998 if (stat(im->graphfile,&imgstat) != 0)
1999 return 0; /* can't stat */
2000 /* one pixel in the existing graph is more then what we would
2001 change here ... */
2002 if (time(NULL) - imgstat.st_mtime >
2003 (im->end - im->start) / im->xsize)
2004 return 0;
2005 if ((fd = fopen(im->graphfile,"rb")) == NULL)
2006 return 0; /* the file does not exist */
2007 switch (im->canvas->imgformat) {
2008 case IF_PNG:
2009 size = PngSize(fd,&(im->ximg),&(im->yimg));
2010 break;
2011 default:
2012 size = 1;
2013 }
2014 fclose(fd);
2015 return size;
2016 }
2018 #ifdef WITH_PIECHART
2019 void
2020 pie_part(image_desc_t *im, gfx_color_t color,
2021 double PieCenterX, double PieCenterY, double Radius,
2022 double startangle, double endangle)
2023 {
2024 gfx_node_t *node;
2025 double angle;
2026 double step=M_PI/50; /* Number of iterations for the circle;
2027 ** 10 is definitely too low, more than
2028 ** 50 seems to be overkill
2029 */
2031 /* Strange but true: we have to work clockwise or else
2032 ** anti aliasing nor transparency don't work.
2033 **
2034 ** This test is here to make sure we do it right, also
2035 ** this makes the for...next loop more easy to implement.
2036 ** The return will occur if the user enters a negative number
2037 ** (which shouldn't be done according to the specs) or if the
2038 ** programmers do something wrong (which, as we all know, never
2039 ** happens anyway :)
2040 */
2041 if (endangle<startangle) return;
2043 /* Hidden feature: Radius decreases each full circle */
2044 angle=startangle;
2045 while (angle>=2*M_PI) {
2046 angle -= 2*M_PI;
2047 Radius *= 0.8;
2048 }
2050 node=gfx_new_area(im->canvas,
2051 PieCenterX+sin(startangle)*Radius,
2052 PieCenterY-cos(startangle)*Radius,
2053 PieCenterX,
2054 PieCenterY,
2055 PieCenterX+sin(endangle)*Radius,
2056 PieCenterY-cos(endangle)*Radius,
2057 color);
2058 for (angle=endangle;angle-startangle>=step;angle-=step) {
2059 gfx_add_point(node,
2060 PieCenterX+sin(angle)*Radius,
2061 PieCenterY-cos(angle)*Radius );
2062 }
2063 }
2065 #endif
2067 int
2068 graph_size_location(image_desc_t *im, int elements
2070 #ifdef WITH_PIECHART
2071 , int piechart
2072 #endif
2074 )
2075 {
2076 /* The actual size of the image to draw is determined from
2077 ** several sources. The size given on the command line is
2078 ** the graph area but we need more as we have to draw labels
2079 ** and other things outside the graph area
2080 */
2082 /* +-+-------------------------------------------+
2083 ** |l|.................title.....................|
2084 ** |e+--+-------------------------------+--------+
2085 ** |b| b| | |
2086 ** |a| a| | pie |
2087 ** |l| l| main graph area | chart |
2088 ** |.| .| | area |
2089 ** |t| y| | |
2090 ** |r+--+-------------------------------+--------+
2091 ** |e| | x-axis labels | |
2092 ** |v+--+-------------------------------+--------+
2093 ** | |..............legends......................|
2094 ** +-+-------------------------------------------+
2095 */
2096 int Xvertical=0, Yvertical=0,
2097 Xtitle =0, Ytitle =0,
2098 Xylabel =0, Yylabel =0,
2099 Xmain =0, Ymain =0,
2100 Xpie =0, Ypie =0,
2101 Xxlabel =0, Yxlabel =0,
2102 #if 0
2103 Xlegend =0, Ylegend =0,
2104 #endif
2105 Xspacing =10, Yspacing =10;
2107 if (im->extra_flags & ONLY_GRAPH) {
2108 Xspacing =0;
2109 Yspacing =0;
2110 } else {
2111 if (im->ylegend[0] != '\0') {
2112 Xvertical = im->text_prop[TEXT_PROP_UNIT].size *2;
2113 Yvertical = gfx_get_text_width(im->canvas, 0,
2114 im->text_prop[TEXT_PROP_UNIT].font,
2115 im->text_prop[TEXT_PROP_UNIT].size,
2116 im->tabwidth,im->ylegend, 0);
2117 }
2118 }
2120 if (im->title[0] != '\0') {
2121 /* The title is placed "inbetween" two text lines so it
2122 ** automatically has some vertical spacing. The horizontal
2123 ** spacing is added here, on each side.
2124 */
2125 Xtitle = gfx_get_text_width(im->canvas, 0,
2126 im->text_prop[TEXT_PROP_TITLE].font,
2127 im->text_prop[TEXT_PROP_TITLE].size,
2128 im->tabwidth,
2129 im->title, 0) + 2*Xspacing;
2130 Ytitle = im->text_prop[TEXT_PROP_TITLE].size*2.5;
2131 }
2133 if (elements) {
2134 Xmain=im->xsize;
2135 Ymain=im->ysize;
2136 if (im->draw_x_grid) {
2137 Xxlabel=Xmain;
2138 Yxlabel=im->text_prop[TEXT_PROP_AXIS].size *2.5;
2139 }
2140 if (im->draw_y_grid) {
2141 Xylabel=im->text_prop[TEXT_PROP_AXIS].size *6;
2142 Yylabel=Ymain;
2143 }
2144 }
2146 #ifdef WITH_PIECHART
2147 if (piechart) {
2148 im->piesize=im->xsize<im->ysize?im->xsize:im->ysize;
2149 Xpie=im->piesize;
2150 Ypie=im->piesize;
2151 }
2152 #endif
2154 /* Now calculate the total size. Insert some spacing where
2155 desired. im->xorigin and im->yorigin need to correspond
2156 with the lower left corner of the main graph area or, if
2157 this one is not set, the imaginary box surrounding the
2158 pie chart area. */
2160 /* The legend width cannot yet be determined, as a result we
2161 ** have problems adjusting the image to it. For now, we just
2162 ** forget about it at all; the legend will have to fit in the
2163 ** size already allocated.
2164 */
2165 im->ximg = Xmain;
2167 if ( !(im->extra_flags & ONLY_GRAPH) ) {
2168 im->ximg = Xylabel + Xmain + Xpie + 2 * Xspacing;
2169 }
2171 if (Xmain) im->ximg += Xspacing;
2172 if (Xpie) im->ximg += Xspacing;
2174 if (im->extra_flags & ONLY_GRAPH) {
2175 im->xorigin = 0;
2176 } else {
2177 im->xorigin = Xspacing + Xylabel;
2178 }
2180 if (Xtitle > im->ximg) im->ximg = Xtitle;
2181 if (Xvertical) {
2182 im->ximg += Xvertical;
2183 im->xorigin += Xvertical;
2184 }
2185 xtr(im,0);
2187 /* The vertical size is interesting... we need to compare
2188 ** the sum of {Ytitle, Ymain, Yxlabel, Ylegend} with Yvertical
2189 ** however we need to know {Ytitle+Ymain+Yxlabel} in order to
2190 ** start even thinking about Ylegend.
2191 **
2192 ** Do it in three portions: First calculate the inner part,
2193 ** then do the legend, then adjust the total height of the img.
2194 */
2196 /* reserve space for main and/or pie */
2198 if (im->extra_flags & ONLY_GRAPH) {
2199 im->yimg = Ymain;
2200 } else {
2201 im->yimg = Ymain + Yxlabel;
2202 }
2204 if (im->yimg < Ypie) im->yimg = Ypie;
2206 if (im->extra_flags & ONLY_GRAPH) {
2207 im->yorigin = im->yimg;
2208 } else {
2209 im->yorigin = im->yimg - Yxlabel;
2210 }
2212 /* reserve space for the title *or* some padding above the graph */
2213 if (Ytitle) {
2214 im->yimg += Ytitle;
2215 im->yorigin += Ytitle;
2216 } else {
2217 im->yimg += Yspacing;
2218 im->yorigin += Yspacing;
2219 }
2220 /* reserve space for padding below the graph */
2221 im->yimg += Yspacing;
2222 ytr(im,DNAN);
2224 /* Determine where to place the legends onto the image.
2225 ** Adjust im->yimg to match the space requirements.
2226 */
2227 if(leg_place(im)==-1)
2228 return -1;
2230 /* last of three steps: check total height of image */
2231 if (im->yimg < Yvertical) im->yimg = Yvertical;
2233 #if 0
2234 if (Xlegend > im->ximg) {
2235 im->ximg = Xlegend;
2236 /* reposition Pie */
2237 }
2238 #endif
2240 #ifdef WITH_PIECHART
2241 /* The pie is placed in the upper right hand corner,
2242 ** just below the title (if any) and with sufficient
2243 ** padding.
2244 */
2245 if (elements) {
2246 im->pie_x = im->ximg - Xspacing - Xpie/2;
2247 im->pie_y = im->yorigin-Ymain+Ypie/2;
2248 } else {
2249 im->pie_x = im->ximg/2;
2250 im->pie_y = im->yorigin-Ypie/2;
2251 }
2252 #endif
2254 return 0;
2255 }
2257 /* draw that picture thing ... */
2258 int
2259 graph_paint(image_desc_t *im, char ***calcpr)
2260 {
2261 int i,ii;
2262 int lazy = lazy_check(im);
2263 #ifdef WITH_PIECHART
2264 int piechart = 0;
2265 double PieStart=0.0;
2266 #endif
2267 FILE *fo;
2268 gfx_node_t *node;
2270 double areazero = 0.0;
2271 enum gf_en stack_gf = GF_PRINT;
2272 graph_desc_t *lastgdes = NULL;
2274 /* if we are lazy and there is nothing to PRINT ... quit now */
2275 if (lazy && im->prt_c==0) return 0;
2277 /* pull the data from the rrd files ... */
2279 if(data_fetch(im)==-1)
2280 return -1;
2282 /* evaluate VDEF and CDEF operations ... */
2283 if(data_calc(im)==-1)
2284 return -1;
2286 #ifdef WITH_PIECHART
2287 /* check if we need to draw a piechart */
2288 for(i=0;i<im->gdes_c;i++){
2289 if (im->gdes[i].gf == GF_PART) {
2290 piechart=1;
2291 break;
2292 }
2293 }
2294 #endif
2296 /* calculate and PRINT and GPRINT definitions. We have to do it at
2297 * this point because it will affect the length of the legends
2298 * if there are no graph elements we stop here ...
2299 * if we are lazy, try to quit ...
2300 */
2301 i=print_calc(im,calcpr);
2302 if(i<0) return -1;
2303 if(((i==0)
2304 #ifdef WITH_PIECHART
2305 &&(piechart==0)
2306 #endif
2307 ) || lazy) return 0;
2309 #ifdef WITH_PIECHART
2310 /* If there's only the pie chart to draw, signal this */
2311 if (i==0) piechart=2;
2312 #endif
2314 /* get actual drawing data and find min and max values*/
2315 if(data_proc(im)==-1)
2316 return -1;
2318 if(!im->logarithmic){si_unit(im);} /* identify si magnitude Kilo, Mega Giga ? */
2320 if(!im->rigid && ! im->logarithmic)
2321 expand_range(im); /* make sure the upper and lower limit are
2322 sensible values */
2324 if (!calc_horizontal_grid(im))
2325 return -1;
2327 if (im->gridfit)
2328 apply_gridfit(im);
2331 /**************************************************************
2332 *** Calculating sizes and locations became a bit confusing ***
2333 *** so I moved this into a separate function. ***
2334 **************************************************************/
2335 if(graph_size_location(im,i
2336 #ifdef WITH_PIECHART
2337 ,piechart
2338 #endif
2339 )==-1)
2340 return -1;
2342 /* the actual graph is created by going through the individual
2343 graph elements and then drawing them */
2345 node=gfx_new_area ( im->canvas,
2346 0, 0,
2347 im->ximg, 0,
2348 im->ximg, im->yimg,
2349 im->graph_col[GRC_BACK]);
2351 gfx_add_point(node,0, im->yimg);
2353 #ifdef WITH_PIECHART
2354 if (piechart != 2) {
2355 #endif
2356 node=gfx_new_area ( im->canvas,
2357 im->xorigin, im->yorigin,
2358 im->xorigin + im->xsize, im->yorigin,
2359 im->xorigin + im->xsize, im->yorigin-im->ysize,
2360 im->graph_col[GRC_CANVAS]);
2362 gfx_add_point(node,im->xorigin, im->yorigin - im->ysize);
2364 if (im->minval > 0.0)
2365 areazero = im->minval;
2366 if (im->maxval < 0.0)
2367 areazero = im->maxval;
2368 #ifdef WITH_PIECHART
2369 }
2370 #endif
2372 #ifdef WITH_PIECHART
2373 if (piechart) {
2374 pie_part(im,im->graph_col[GRC_CANVAS],im->pie_x,im->pie_y,im->piesize*0.5,0,2*M_PI);
2375 }
2376 #endif
2378 for(i=0;i<im->gdes_c;i++){
2379 switch(im->gdes[i].gf){
2380 case GF_CDEF:
2381 case GF_VDEF:
2382 case GF_DEF:
2383 case GF_PRINT:
2384 case GF_GPRINT:
2385 case GF_COMMENT:
2386 case GF_HRULE:
2387 case GF_VRULE:
2388 case GF_XPORT:
2389 case GF_SHIFT:
2390 break;
2391 case GF_TICK:
2392 for (ii = 0; ii < im->xsize; ii++)
2393 {
2394 if (!isnan(im->gdes[i].p_data[ii]) &&
2395 im->gdes[i].p_data[ii] > 0.0)
2396 {
2397 /* generate a tick */
2398 gfx_new_line(im->canvas, im -> xorigin + ii,
2399 im -> yorigin - (im -> gdes[i].yrule * im -> ysize),
2400 im -> xorigin + ii,
2401 im -> yorigin,
2402 1.0,
2403 im -> gdes[i].col );
2404 }
2405 }
2406 break;
2407 case GF_LINE:
2408 case GF_AREA:
2409 stack_gf = im->gdes[i].gf;
2410 case GF_STACK:
2411 /* fix data points at oo and -oo */
2412 for(ii=0;ii<im->xsize;ii++){
2413 if (isinf(im->gdes[i].p_data[ii])){
2414 if (im->gdes[i].p_data[ii] > 0) {
2415 im->gdes[i].p_data[ii] = im->maxval ;
2416 } else {
2417 im->gdes[i].p_data[ii] = im->minval ;
2418 }
2420 }
2421 } /* for */
2423 if (im->gdes[i].col != 0x0){
2424 /* GF_LINE and friend */
2425 if(stack_gf == GF_LINE ){
2426 node = NULL;
2427 for(ii=1;ii<im->xsize;ii++){
2428 if ( ! isnan(im->gdes[i].p_data[ii-1])
2429 && ! isnan(im->gdes[i].p_data[ii])){
2430 if (node == NULL){
2431 node = gfx_new_line(im->canvas,
2432 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii-1]),
2433 ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]),
2434 im->gdes[i].linewidth,
2435 im->gdes[i].col);
2436 } else {
2437 gfx_add_point(node,ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]));
2438 }
2439 } else {
2440 node = NULL;
2441 }
2442 }
2443 } else {
2444 int area_start=-1;
2445 node = NULL;
2446 for(ii=1;ii<im->xsize;ii++){
2447 /* open an area */
2448 if ( ! isnan(im->gdes[i].p_data[ii-1])
2449 && ! isnan(im->gdes[i].p_data[ii])){
2450 if (node == NULL){
2451 float ybase = 0.0;
2452 /*
2453 if (im->gdes[i].gf == GF_STACK) {
2454 */
2455 if ( (im->gdes[i].gf == GF_STACK)
2456 || (im->gdes[i].stack) ) {
2458 ybase = ytr(im,lastgdes->p_data[ii-1]);
2459 } else {
2460 ybase = ytr(im,areazero);
2461 }
2462 area_start = ii-1;
2463 node = gfx_new_area(im->canvas,
2464 ii-1+im->xorigin,ybase,
2465 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii-1]),
2466 ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]),
2467 im->gdes[i].col
2468 );
2469 } else {
2470 gfx_add_point(node,ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]));
2471 }
2472 }
2474 if ( node != NULL && (ii+1==im->xsize || isnan(im->gdes[i].p_data[ii]) )){
2475 /* GF_AREA STACK type*/
2476 /*
2477 if (im->gdes[i].gf == GF_STACK ) {
2478 */
2479 if ( (im->gdes[i].gf == GF_STACK)
2480 || (im->gdes[i].stack) ) {
2481 int iii;
2482 for (iii=ii-1;iii>area_start;iii--){
2483 gfx_add_point(node,iii+im->xorigin,ytr(im,lastgdes->p_data[iii]));
2484 }
2485 } else {
2486 gfx_add_point(node,ii+im->xorigin,ytr(im,areazero));
2487 };
2488 node=NULL;
2489 };
2490 }
2491 } /* else GF_LINE */
2492 } /* if color != 0x0 */
2493 /* make sure we do not run into trouble when stacking on NaN */
2494 for(ii=0;ii<im->xsize;ii++){
2495 if (isnan(im->gdes[i].p_data[ii])) {
2496 if (lastgdes && (im->gdes[i].gf == GF_STACK)) {
2497 im->gdes[i].p_data[ii] = lastgdes->p_data[ii];
2498 } else {
2499 im->gdes[i].p_data[ii] = ytr(im,areazero);
2500 }
2501 }
2502 }
2503 lastgdes = &(im->gdes[i]);
2504 break;
2505 #ifdef WITH_PIECHART
2506 case GF_PART:
2507 if(isnan(im->gdes[i].yrule)) /* fetch variable */
2508 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2510 if (finite(im->gdes[i].yrule)) { /* even the fetched var can be NaN */
2511 pie_part(im,im->gdes[i].col,
2512 im->pie_x,im->pie_y,im->piesize*0.4,
2513 M_PI*2.0*PieStart/100.0,
2514 M_PI*2.0*(PieStart+im->gdes[i].yrule)/100.0);
2515 PieStart += im->gdes[i].yrule;
2516 }
2517 break;
2518 #endif
2520 } /* switch */
2521 }
2522 #ifdef WITH_PIECHART
2523 if (piechart==2) {
2524 im->draw_x_grid=0;
2525 im->draw_y_grid=0;
2526 }
2527 #endif
2529 if( !(im->extra_flags & ONLY_GRAPH) )
2530 axis_paint(im);
2532 /* grid_paint also does the text */
2533 if( !(im->extra_flags & ONLY_GRAPH) )
2534 grid_paint(im);
2536 /* the RULES are the last thing to paint ... */
2537 for(i=0;i<im->gdes_c;i++){
2539 switch(im->gdes[i].gf){
2540 case GF_HRULE:
2541 if(isnan(im->gdes[i].yrule)) { /* fetch variable */
2542 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2543 };
2544 if(im->gdes[i].yrule >= im->minval
2545 && im->gdes[i].yrule <= im->maxval)
2546 gfx_new_line(im->canvas,
2547 im->xorigin,ytr(im,im->gdes[i].yrule),
2548 im->xorigin+im->xsize,ytr(im,im->gdes[i].yrule),
2549 1.0,im->gdes[i].col);
2550 break;
2551 case GF_VRULE:
2552 if(im->gdes[i].xrule == 0) { /* fetch variable */
2553 im->gdes[i].xrule = im->gdes[im->gdes[i].vidx].vf.when;
2554 };
2555 if(im->gdes[i].xrule >= im->start
2556 && im->gdes[i].xrule <= im->end)
2557 gfx_new_line(im->canvas,
2558 xtr(im,im->gdes[i].xrule),im->yorigin,
2559 xtr(im,im->gdes[i].xrule),im->yorigin-im->ysize,
2560 1.0,im->gdes[i].col);
2561 break;
2562 default:
2563 break;
2564 }
2565 }
2568 if (strcmp(im->graphfile,"-")==0) {
2569 fo = im->graphhandle ? im->graphhandle : stdout;
2570 #if defined(WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
2571 /* Change translation mode for stdout to BINARY */
2572 _setmode( _fileno( fo ), O_BINARY );
2573 #endif
2574 } else {
2575 if ((fo = fopen(im->graphfile,"wb")) == NULL) {
2576 rrd_set_error("Opening '%s' for write: %s",im->graphfile,
2577 rrd_strerror(errno));
2578 return (-1);
2579 }
2580 }
2581 gfx_render (im->canvas,im->ximg,im->yimg,0x0,fo);
2582 if (strcmp(im->graphfile,"-") != 0)
2583 fclose(fo);
2584 return 0;
2585 }
2588 /*****************************************************
2589 * graph stuff
2590 *****************************************************/
2592 int
2593 gdes_alloc(image_desc_t *im){
2595 im->gdes_c++;
2596 if ((im->gdes = (graph_desc_t *) rrd_realloc(im->gdes, (im->gdes_c)
2597 * sizeof(graph_desc_t)))==NULL){
2598 rrd_set_error("realloc graph_descs");
2599 return -1;
2600 }
2603 im->gdes[im->gdes_c-1].step=im->step;
2604 im->gdes[im->gdes_c-1].stack=0;
2605 im->gdes[im->gdes_c-1].debug=0;
2606 im->gdes[im->gdes_c-1].start=im->start;
2607 im->gdes[im->gdes_c-1].end=im->end;
2608 im->gdes[im->gdes_c-1].vname[0]='\0';
2609 im->gdes[im->gdes_c-1].data=NULL;
2610 im->gdes[im->gdes_c-1].ds_namv=NULL;
2611 im->gdes[im->gdes_c-1].data_first=0;
2612 im->gdes[im->gdes_c-1].p_data=NULL;
2613 im->gdes[im->gdes_c-1].rpnp=NULL;
2614 im->gdes[im->gdes_c-1].shift=0;
2615 im->gdes[im->gdes_c-1].col = 0x0;
2616 im->gdes[im->gdes_c-1].legend[0]='\0';
2617 im->gdes[im->gdes_c-1].format[0]='\0';
2618 im->gdes[im->gdes_c-1].rrd[0]='\0';
2619 im->gdes[im->gdes_c-1].ds=-1;
2620 im->gdes[im->gdes_c-1].p_data=NULL;
2621 im->gdes[im->gdes_c-1].yrule=DNAN;
2622 im->gdes[im->gdes_c-1].xrule=0;
2623 return 0;
2624 }
2626 /* copies input untill the first unescaped colon is found
2627 or until input ends. backslashes have to be escaped as well */
2628 int
2629 scan_for_col(char *input, int len, char *output)
2630 {
2631 int inp,outp=0;
2632 for (inp=0;
2633 inp < len &&
2634 input[inp] != ':' &&
2635 input[inp] != '\0';
2636 inp++){
2637 if (input[inp] == '\\' &&
2638 input[inp+1] != '\0' &&
2639 (input[inp+1] == '\\' ||
2640 input[inp+1] == ':')){
2641 output[outp++] = input[++inp];
2642 }
2643 else {
2644 output[outp++] = input[inp];
2645 }
2646 }
2647 output[outp] = '\0';
2648 return inp;
2649 }
2650 /* Some surgery done on this function, it became ridiculously big.
2651 ** Things moved:
2652 ** - initializing now in rrd_graph_init()
2653 ** - options parsing now in rrd_graph_options()
2654 ** - script parsing now in rrd_graph_script()
2655 */
2656 int
2657 rrd_graph(int argc, char **argv, char ***prdata, int *xsize, int *ysize, FILE *stream, double *ymin, double *ymax)
2658 {
2659 image_desc_t im;
2661 rrd_graph_init(&im);
2662 im.graphhandle = stream;
2664 rrd_graph_options(argc,argv,&im);
2665 if (rrd_test_error()) {
2666 im_free(&im);
2667 return -1;
2668 }
2670 if (strlen(argv[optind])>=MAXPATH) {
2671 rrd_set_error("filename (including path) too long");
2672 im_free(&im);
2673 return -1;
2674 }
2675 strncpy(im.graphfile,argv[optind],MAXPATH-1);
2676 im.graphfile[MAXPATH-1]='\0';
2678 rrd_graph_script(argc,argv,&im,1);
2679 if (rrd_test_error()) {
2680 im_free(&im);
2681 return -1;
2682 }
2684 /* Everything is now read and the actual work can start */
2686 (*prdata)=NULL;
2687 if (graph_paint(&im,prdata)==-1){
2688 im_free(&im);
2689 return -1;
2690 }
2692 /* The image is generated and needs to be output.
2693 ** Also, if needed, print a line with information about the image.
2694 */
2696 *xsize=im.ximg;
2697 *ysize=im.yimg;
2698 *ymin=im.minval;
2699 *ymax=im.maxval;
2700 if (im.imginfo) {
2701 char *filename;
2702 if (!(*prdata)) {
2703 /* maybe prdata is not allocated yet ... lets do it now */
2704 if ((*prdata = calloc(2,sizeof(char *)))==NULL) {
2705 rrd_set_error("malloc imginfo");
2706 return -1;
2707 };
2708 }
2709 if(((*prdata)[0] = malloc((strlen(im.imginfo)+200+strlen(im.graphfile))*sizeof(char)))
2710 ==NULL){
2711 rrd_set_error("malloc imginfo");
2712 return -1;
2713 }
2714 filename=im.graphfile+strlen(im.graphfile);
2715 while(filename > im.graphfile) {
2716 if (*(filename-1)=='/' || *(filename-1)=='\\' ) break;
2717 filename--;
2718 }
2720 sprintf((*prdata)[0],im.imginfo,filename,(long)(im.canvas->zoom*im.ximg),(long)(im.canvas->zoom*im.yimg));
2721 }
2722 im_free(&im);
2723 return 0;
2724 }
2726 void
2727 rrd_graph_init(image_desc_t *im)
2728 {
2729 unsigned int i;
2731 #ifdef HAVE_TZSET
2732 tzset();
2733 #endif
2734 #ifdef HAVE_SETLOCALE
2735 setlocale(LC_TIME,"");
2736 #endif
2738 im->xlab_user.minsec = -1;
2739 im->ximg=0;
2740 im->yimg=0;
2741 im->xsize = 400;
2742 im->ysize = 100;
2743 im->step = 0;
2744 im->ylegend[0] = '\0';
2745 im->title[0] = '\0';
2746 im->minval = DNAN;
2747 im->maxval = DNAN;
2748 im->unitsexponent= 9999;
2749 im->extra_flags= 0;
2750 im->rigid = 0;
2751 im->gridfit = 1;
2752 im->imginfo = NULL;
2753 im->lazy = 0;
2754 im->logarithmic = 0;
2755 im->ygridstep = DNAN;
2756 im->draw_x_grid = 1;
2757 im->draw_y_grid = 1;
2758 im->base = 1000;
2759 im->prt_c = 0;
2760 im->gdes_c = 0;
2761 im->gdes = NULL;
2762 im->canvas = gfx_new_canvas();
2763 im->grid_dash_on = 1;
2764 im->grid_dash_off = 1;
2765 im->tabwidth = 40.0;
2767 for(i=0;i<DIM(graph_col);i++)
2768 im->graph_col[i]=graph_col[i];
2770 #if defined(WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
2771 {
2772 char *windir;
2773 char rrd_win_default_font[1000];
2774 windir = getenv("windir");
2775 /* %windir% is something like D:\windows or C:\winnt */
2776 if (windir != NULL) {
2777 strncpy(rrd_win_default_font,windir,999);
2778 rrd_win_default_font[999] = '\0';
2779 strcat(rrd_win_default_font,"\\fonts\\cour.ttf");
2780 for(i=0;i<DIM(text_prop);i++){
2781 strncpy(text_prop[i].font,rrd_win_default_font,sizeof(text_prop[i].font)-1);
2782 text_prop[i].font[sizeof(text_prop[i].font)-1] = '\0';
2783 }
2784 }
2785 #endif
2786 {
2787 char *deffont;
2788 deffont = getenv("RRD_DEFAULT_FONT");
2789 /* %windir% is something like D:\windows or C:\winnt */
2790 if (deffont != NULL) {
2791 for(i=0;i<DIM(text_prop);i++){
2792 strncpy(text_prop[i].font,deffont,sizeof(text_prop[i].font)-1);
2793 text_prop[i].font[sizeof(text_prop[i].font)-1] = '\0';
2794 }
2795 }
2796 }
2797 for(i=0;i<DIM(text_prop);i++){
2798 im->text_prop[i].size = text_prop[i].size;
2799 strcpy(im->text_prop[i].font,text_prop[i].font);
2800 }
2801 }
2803 void
2804 rrd_graph_options(int argc, char *argv[],image_desc_t *im)
2805 {
2806 int stroff;
2807 char *parsetime_error = NULL;
2808 char scan_gtm[12],scan_mtm[12],scan_ltm[12],col_nam[12];
2809 time_t start_tmp=0,end_tmp=0;
2810 long long_tmp;
2811 struct rrd_time_value start_tv, end_tv;
2812 gfx_color_t color;
2814 parsetime("end-24h", &start_tv);
2815 parsetime("now", &end_tv);
2817 while (1){
2818 static struct option long_options[] =
2819 {
2820 {"start", required_argument, 0, 's'},
2821 {"end", required_argument, 0, 'e'},
2822 {"x-grid", required_argument, 0, 'x'},
2823 {"y-grid", required_argument, 0, 'y'},
2824 {"vertical-label",required_argument,0,'v'},
2825 {"width", required_argument, 0, 'w'},
2826 {"height", required_argument, 0, 'h'},
2827 {"interlaced", no_argument, 0, 'i'},
2828 {"upper-limit",required_argument, 0, 'u'},
2829 {"lower-limit",required_argument, 0, 'l'},
2830 {"rigid", no_argument, 0, 'r'},
2831 {"base", required_argument, 0, 'b'},
2832 {"logarithmic",no_argument, 0, 'o'},
2833 {"color", required_argument, 0, 'c'},
2834 {"font", required_argument, 0, 'n'},
2835 {"title", required_argument, 0, 't'},
2836 {"imginfo", required_argument, 0, 'f'},
2837 {"imgformat", required_argument, 0, 'a'},
2838 {"lazy", no_argument, 0, 'z'},
2839 {"zoom", required_argument, 0, 'm'},
2840 {"no-legend", no_argument, 0, 'g'},
2841 {"force-rules-legend",no_argument,0, 'F'},
2842 {"only-graph", no_argument, 0, 'j'},
2843 {"alt-y-grid", no_argument, 0, 'Y'},
2844 {"no-minor", no_argument, 0, 'I'},
2845 {"alt-autoscale", no_argument, 0, 'A'},
2846 {"alt-autoscale-max", no_argument, 0, 'M'},
2847 {"units-exponent",required_argument, 0, 'X'},
2848 {"step", required_argument, 0, 'S'},
2849 {"tabwidth", required_argument, 0, 'T'},
2850 {"no-gridfit", no_argument, 0, 'N'},
2851 {0,0,0,0}};
2852 int option_index = 0;
2853 int opt;
2856 opt = getopt_long(argc, argv,
2857 "s:e:x:y:v:w:h:iu:l:rb:oc:n:m:t:f:a:I:zgjFYAMX:S:NT:",
2858 long_options, &option_index);
2860 if (opt == EOF)
2861 break;
2863 switch(opt) {
2864 case 'I':
2865 im->extra_flags |= NOMINOR;
2866 break;
2867 case 'Y':
2868 im->extra_flags |= ALTYGRID;
2869 break;
2870 case 'A':
2871 im->extra_flags |= ALTAUTOSCALE;
2872 break;
2873 case 'M':
2874 im->extra_flags |= ALTAUTOSCALE_MAX;
2875 break;
2876 case 'j':
2877 im->extra_flags |= ONLY_GRAPH;
2878 break;
2879 case 'g':
2880 im->extra_flags |= NOLEGEND;
2881 break;
2882 case 'F':
2883 im->extra_flags |= FORCE_RULES_LEGEND;
2884 break;
2885 case 'X':
2886 im->unitsexponent = atoi(optarg);
2887 break;
2888 case 'T':
2889 im->tabwidth = atof(optarg);
2890 break;
2891 case 'S':
2892 im->step = atoi(optarg);
2893 break;
2894 case 262:
2895 im->gridfit = 0;
2896 break;
2897 case 's':
2898 if ((parsetime_error = parsetime(optarg, &start_tv))) {
2899 rrd_set_error( "start time: %s", parsetime_error );
2900 return;
2901 }
2902 break;
2903 case 'e':
2904 if ((parsetime_error = parsetime(optarg, &end_tv))) {
2905 rrd_set_error( "end time: %s", parsetime_error );
2906 return;
2907 }
2908 break;
2909 case 'x':
2910 if(strcmp(optarg,"none") == 0){
2911 im->draw_x_grid=0;
2912 break;
2913 };
2915 if(sscanf(optarg,
2916 "%10[A-Z]:%ld:%10[A-Z]:%ld:%10[A-Z]:%ld:%ld:%n",
2917 scan_gtm,
2918 &im->xlab_user.gridst,
2919 scan_mtm,
2920 &im->xlab_user.mgridst,
2921 scan_ltm,
2922 &im->xlab_user.labst,
2923 &im->xlab_user.precis,
2924 &stroff) == 7 && stroff != 0){
2925 strncpy(im->xlab_form, optarg+stroff, sizeof(im->xlab_form) - 1);
2926 im->xlab_form[sizeof(im->xlab_form)-1] = '\0';
2927 if((int)(im->xlab_user.gridtm = tmt_conv(scan_gtm)) == -1){
2928 rrd_set_error("unknown keyword %s",scan_gtm);
2929 return;
2930 } else if ((int)(im->xlab_user.mgridtm = tmt_conv(scan_mtm)) == -1){
2931 rrd_set_error("unknown keyword %s",scan_mtm);
2932 return;
2933 } else if ((int)(im->xlab_user.labtm = tmt_conv(scan_ltm)) == -1){
2934 rrd_set_error("unknown keyword %s",scan_ltm);
2935 return;
2936 }
2937 im->xlab_user.minsec = 1;
2938 im->xlab_user.stst = im->xlab_form;
2939 } else {
2940 rrd_set_error("invalid x-grid format");
2941 return;
2942 }
2943 break;
2944 case 'y':
2946 if(strcmp(optarg,"none") == 0){
2947 im->draw_y_grid=0;
2948 break;
2949 };
2951 if(sscanf(optarg,
2952 "%lf:%d",
2953 &im->ygridstep,
2954 &im->ylabfact) == 2) {
2955 if(im->ygridstep<=0){
2956 rrd_set_error("grid step must be > 0");
2957 return;
2958 } else if (im->ylabfact < 1){
2959 rrd_set_error("label factor must be > 0");
2960 return;
2961 }
2962 } else {
2963 rrd_set_error("invalid y-grid format");
2964 return;
2965 }
2966 break;
2967 case 'v':
2968 strncpy(im->ylegend,optarg,150);
2969 im->ylegend[150]='\0';
2970 break;
2971 case 'u':
2972 im->maxval = atof(optarg);
2973 break;
2974 case 'l':
2975 im->minval = atof(optarg);
2976 break;
2977 case 'b':
2978 im->base = atol(optarg);
2979 if(im->base != 1024 && im->base != 1000 ){
2980 rrd_set_error("the only sensible value for base apart from 1000 is 1024");
2981 return;
2982 }
2983 break;
2984 case 'w':
2985 long_tmp = atol(optarg);
2986 if (long_tmp < 10) {
2987 rrd_set_error("width below 10 pixels");
2988 return;
2989 }
2990 im->xsize = long_tmp;
2991 break;
2992 case 'h':
2993 long_tmp = atol(optarg);
2994 if (long_tmp < 10) {
2995 rrd_set_error("height below 10 pixels");
2996 return;
2997 }
2998 im->ysize = long_tmp;
2999 break;
3000 case 'i':
3001 im->canvas->interlaced = 1;
3002 break;
3003 case 'r':
3004 im->rigid = 1;
3005 break;
3006 case 'f':
3007 im->imginfo = optarg;
3008 break;
3009 case 'a':
3010 if((int)(im->canvas->imgformat = if_conv(optarg)) == -1) {
3011 rrd_set_error("unsupported graphics format '%s'",optarg);
3012 return;
3013 }
3014 break;
3015 case 'z':
3016 im->lazy = 1;
3017 break;
3018 case 'o':
3019 im->logarithmic = 1;
3020 if (isnan(im->minval))
3021 im->minval=1;
3022 break;
3023 case 'c':
3024 if(sscanf(optarg,
3025 "%10[A-Z]#%8lx",
3026 col_nam,&color) == 2){
3027 int ci;
3028 if((ci=grc_conv(col_nam)) != -1){
3029 im->graph_col[ci]=color;
3030 } else {
3031 rrd_set_error("invalid color name '%s'",col_nam);
3032 }
3033 } else {
3034 rrd_set_error("invalid color def format");
3035 return;
3036 }
3037 break;
3038 case 'n':{
3039 char prop[15];
3040 double size = 1;
3041 char font[1024];
3043 if(sscanf(optarg,
3044 "%10[A-Z]:%lf:%1000s",
3045 prop,&size,font) == 3){
3046 int sindex;
3047 if((sindex=text_prop_conv(prop)) != -1){
3048 im->text_prop[sindex].size=size;
3049 strcpy(im->text_prop[sindex].font,font);
3050 if (sindex==0) { /* the default */
3051 im->text_prop[TEXT_PROP_TITLE].size=size;
3052 strcpy(im->text_prop[TEXT_PROP_TITLE].font,font);
3053 im->text_prop[TEXT_PROP_AXIS].size=size;
3054 strcpy(im->text_prop[TEXT_PROP_AXIS].font,font);
3055 im->text_prop[TEXT_PROP_UNIT].size=size;
3056 strcpy(im->text_prop[TEXT_PROP_UNIT].font,font);
3057 im->text_prop[TEXT_PROP_LEGEND].size=size;
3058 strcpy(im->text_prop[TEXT_PROP_LEGEND].font,font);
3059 }
3060 } else {
3061 rrd_set_error("invalid fonttag '%s'",prop);
3062 return;
3063 }
3064 } else {
3065 rrd_set_error("invalid text property format");
3066 return;
3067 }
3068 break;
3069 }
3070 case 'm':
3071 im->canvas->zoom = atof(optarg);
3072 if (im->canvas->zoom <= 0.0) {
3073 rrd_set_error("zoom factor must be > 0");
3074 return;
3075 }
3076 break;
3077 case 't':
3078 strncpy(im->title,optarg,150);
3079 im->title[150]='\0';
3080 break;
3082 case '?':
3083 if (optopt != 0)
3084 rrd_set_error("unknown option '%c'", optopt);
3085 else
3086 rrd_set_error("unknown option '%s'",argv[optind-1]);
3087 return;
3088 }
3089 }
3091 if (optind >= argc) {
3092 rrd_set_error("missing filename");
3093 return;
3094 }
3096 if (im->logarithmic == 1 && (im->minval <= 0 || isnan(im->minval))){
3097 rrd_set_error("for a logarithmic yaxis you must specify a lower-limit > 0");
3098 return;
3099 }
3101 if (proc_start_end(&start_tv,&end_tv,&start_tmp,&end_tmp) == -1){
3102 /* error string is set in parsetime.c */
3103 return;
3104 }
3106 if (start_tmp < 3600*24*365*10){
3107 rrd_set_error("the first entry to fetch should be after 1980 (%ld)",start_tmp);
3108 return;
3109 }
3111 if (end_tmp < start_tmp) {
3112 rrd_set_error("start (%ld) should be less than end (%ld)",
3113 start_tmp, end_tmp);
3114 return;
3115 }
3117 im->start = start_tmp;
3118 im->end = end_tmp;
3119 im->step = max((long)im->step, (im->end-im->start)/im->xsize);
3120 }
3122 int
3123 rrd_graph_check_vname(image_desc_t *im, char *varname, char *err)
3124 {
3125 if ((im->gdes[im->gdes_c-1].vidx=find_var(im,varname))==-1) {
3126 rrd_set_error("Unknown variable '%s' in %s",varname,err);
3127 return -1;
3128 }
3129 return 0;
3130 }
3131 int
3132 rrd_graph_color(image_desc_t *im, char *var, char *err, int optional)
3133 {
3134 char *color;
3135 graph_desc_t *gdp=&im->gdes[im->gdes_c-1];
3137 color=strstr(var,"#");
3138 if (color==NULL) {
3139 if (optional==0) {
3140 rrd_set_error("Found no color in %s",err);
3141 return 0;
3142 }
3143 return 0;
3144 } else {
3145 int n=0;
3146 char *rest;
3147 gfx_color_t col;
3149 rest=strstr(color,":");
3150 if (rest!=NULL)
3151 n=rest-color;
3152 else
3153 n=strlen(color);
3155 switch (n) {
3156 case 7:
3157 sscanf(color,"#%6lx%n",&col,&n);
3158 col = (col << 8) + 0xff /* shift left by 8 */;
3159 if (n!=7) rrd_set_error("Color problem in %s",err);
3160 break;
3161 case 9:
3162 sscanf(color,"#%8lx%n",&col,&n);
3163 if (n==9) break;
3164 default:
3165 rrd_set_error("Color problem in %s",err);
3166 }
3167 if (rrd_test_error()) return 0;
3168 gdp->col = col;
3169 return n;
3170 }
3171 }
3174 int bad_format(char *fmt) {
3175 char *ptr;
3176 int n=0;
3177 ptr = fmt;
3178 while (*ptr != '\0')
3179 if (*ptr++ == '%') {
3181 /* line cannot end with percent char */
3182 if (*ptr == '\0') return 1;
3184 /* '%s', '%S' and '%%' are allowed */
3185 if (*ptr == 's' || *ptr == 'S' || *ptr == '%') ptr++;
3187 /* or else '% 6.2lf' and such are allowed */
3188 else {
3190 /* optional padding character */
3191 if (*ptr == ' ' || *ptr == '+' || *ptr == '-') ptr++;
3193 /* This should take care of 'm.n' with all three optional */
3194 while (*ptr >= '0' && *ptr <= '9') ptr++;
3195 if (*ptr == '.') ptr++;
3196 while (*ptr >= '0' && *ptr <= '9') ptr++;
3198 /* Either 'le', 'lf' or 'lg' must follow here */
3199 if (*ptr++ != 'l') return 1;
3200 if (*ptr == 'e' || *ptr == 'f' || *ptr == 'g') ptr++;
3201 else return 1;
3202 n++;
3203 }
3204 }
3206 return (n!=1);
3207 }
3210 int
3211 vdef_parse(gdes,str)
3212 struct graph_desc_t *gdes;
3213 char *str;
3214 {
3215 /* A VDEF currently is either "func" or "param,func"
3216 * so the parsing is rather simple. Change if needed.
3217 */
3218 double param;
3219 char func[30];
3220 int n;
3222 n=0;
3223 sscanf(str,"%le,%29[A-Z]%n",¶m,func,&n);
3224 if (n== (int)strlen(str)) { /* matched */
3225 ;
3226 } else {
3227 n=0;
3228 sscanf(str,"%29[A-Z]%n",func,&n);
3229 if (n== (int)strlen(str)) { /* matched */
3230 param=DNAN;
3231 } else {
3232 rrd_set_error("Unknown function string '%s' in VDEF '%s'"
3233 ,str
3234 ,gdes->vname
3235 );
3236 return -1;
3237 }
3238 }
3239 if (!strcmp("PERCENT",func)) gdes->vf.op = VDEF_PERCENT;
3240 else if (!strcmp("MAXIMUM",func)) gdes->vf.op = VDEF_MAXIMUM;
3241 else if (!strcmp("AVERAGE",func)) gdes->vf.op = VDEF_AVERAGE;
3242 else if (!strcmp("MINIMUM",func)) gdes->vf.op = VDEF_MINIMUM;
3243 else if (!strcmp("TOTAL", func)) gdes->vf.op = VDEF_TOTAL;
3244 else if (!strcmp("FIRST", func)) gdes->vf.op = VDEF_FIRST;
3245 else if (!strcmp("LAST", func)) gdes->vf.op = VDEF_LAST;
3246 else {
3247 rrd_set_error("Unknown function '%s' in VDEF '%s'\n"
3248 ,func
3249 ,gdes->vname
3250 );
3251 return -1;
3252 };
3254 switch (gdes->vf.op) {
3255 case VDEF_PERCENT:
3256 if (isnan(param)) { /* no parameter given */
3257 rrd_set_error("Function '%s' needs parameter in VDEF '%s'\n"
3258 ,func
3259 ,gdes->vname
3260 );
3261 return -1;
3262 };
3263 if (param>=0.0 && param<=100.0) {
3264 gdes->vf.param = param;
3265 gdes->vf.val = DNAN; /* undefined */
3266 gdes->vf.when = 0; /* undefined */
3267 } else {
3268 rrd_set_error("Parameter '%f' out of range in VDEF '%s'\n"
3269 ,param
3270 ,gdes->vname
3271 );
3272 return -1;
3273 };
3274 break;
3275 case VDEF_MAXIMUM:
3276 case VDEF_AVERAGE:
3277 case VDEF_MINIMUM:
3278 case VDEF_TOTAL:
3279 case VDEF_FIRST:
3280 case VDEF_LAST:
3281 if (isnan(param)) {
3282 gdes->vf.param = DNAN;
3283 gdes->vf.val = DNAN;
3284 gdes->vf.when = 0;
3285 } else {
3286 rrd_set_error("Function '%s' needs no parameter in VDEF '%s'\n"
3287 ,func
3288 ,gdes->vname
3289 );
3290 return -1;
3291 };
3292 break;
3293 };
3294 return 0;
3295 }
3298 int
3299 vdef_calc(im,gdi)
3300 image_desc_t *im;
3301 int gdi;
3302 {
3303 graph_desc_t *src,*dst;
3304 rrd_value_t *data;
3305 long step,steps;
3307 dst = &im->gdes[gdi];
3308 src = &im->gdes[dst->vidx];
3309 data = src->data + src->ds;
3310 steps = (src->end - src->start) / src->step;
3312 #if 0
3313 printf("DEBUG: start == %lu, end == %lu, %lu steps\n"
3314 ,src->start
3315 ,src->end
3316 ,steps
3317 );
3318 #endif
3320 switch (dst->vf.op) {
3321 case VDEF_PERCENT: {
3322 rrd_value_t * array;
3323 int field;
3326 if ((array = malloc(steps*sizeof(double)))==NULL) {
3327 rrd_set_error("malloc VDEV_PERCENT");
3328 return -1;
3329 }
3330 for (step=0;step < steps; step++) {
3331 array[step]=data[step*src->ds_cnt];
3332 }
3333 qsort(array,step,sizeof(double),vdef_percent_compar);
3335 field = (steps-1)*dst->vf.param/100;
3336 dst->vf.val = array[field];
3337 dst->vf.when = 0; /* no time component */
3338 free(array);
3339 #if 0
3340 for(step=0;step<steps;step++)
3341 printf("DEBUG: %3li:%10.2f %c\n",step,array[step],step==field?'*':' ');
3342 #endif
3343 }
3344 break;
3345 case VDEF_MAXIMUM:
3346 step=0;
3347 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3348 if (step == steps) {
3349 dst->vf.val = DNAN;
3350 dst->vf.when = 0;
3351 } else {
3352 dst->vf.val = data[step*src->ds_cnt];
3353 dst->vf.when = src->start + (step+1)*src->step;
3354 }
3355 while (step != steps) {
3356 if (finite(data[step*src->ds_cnt])) {
3357 if (data[step*src->ds_cnt] > dst->vf.val) {
3358 dst->vf.val = data[step*src->ds_cnt];
3359 dst->vf.when = src->start + (step+1)*src->step;
3360 }
3361 }
3362 step++;
3363 }
3364 break;
3365 case VDEF_TOTAL:
3366 case VDEF_AVERAGE: {
3367 int cnt=0;
3368 double sum=0.0;
3369 for (step=0;step<steps;step++) {
3370 if (finite(data[step*src->ds_cnt])) {
3371 sum += data[step*src->ds_cnt];
3372 cnt ++;
3373 };
3374 }
3375 if (cnt) {
3376 if (dst->vf.op == VDEF_TOTAL) {
3377 dst->vf.val = sum*src->step;
3378 dst->vf.when = cnt*src->step; /* not really "when" */
3379 } else {
3380 dst->vf.val = sum/cnt;
3381 dst->vf.when = 0; /* no time component */
3382 };
3383 } else {
3384 dst->vf.val = DNAN;
3385 dst->vf.when = 0;
3386 }
3387 }
3388 break;
3389 case VDEF_MINIMUM:
3390 step=0;
3391 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3392 if (step == steps) {
3393 dst->vf.val = DNAN;
3394 dst->vf.when = 0;
3395 } else {
3396 dst->vf.val = data[step*src->ds_cnt];
3397 dst->vf.when = src->start + (step+1)*src->step;
3398 }
3399 while (step != steps) {
3400 if (finite(data[step*src->ds_cnt])) {
3401 if (data[step*src->ds_cnt] < dst->vf.val) {
3402 dst->vf.val = data[step*src->ds_cnt];
3403 dst->vf.when = src->start + (step+1)*src->step;
3404 }
3405 }
3406 step++;
3407 }
3408 break;
3409 case VDEF_FIRST:
3410 /* The time value returned here is one step before the
3411 * actual time value. This is the start of the first
3412 * non-NaN interval.
3413 */
3414 step=0;
3415 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3416 if (step == steps) { /* all entries were NaN */
3417 dst->vf.val = DNAN;
3418 dst->vf.when = 0;
3419 } else {
3420 dst->vf.val = data[step*src->ds_cnt];
3421 dst->vf.when = src->start + step*src->step;
3422 }
3423 break;
3424 case VDEF_LAST:
3425 /* The time value returned here is the
3426 * actual time value. This is the end of the last
3427 * non-NaN interval.
3428 */
3429 step=steps-1;
3430 while (step >= 0 && isnan(data[step*src->ds_cnt])) step--;
3431 if (step < 0) { /* all entries were NaN */
3432 dst->vf.val = DNAN;
3433 dst->vf.when = 0;
3434 } else {
3435 dst->vf.val = data[step*src->ds_cnt];
3436 dst->vf.when = src->start + (step+1)*src->step;
3437 }
3438 break;
3439 }
3440 return 0;
3441 }
3443 /* NaN < -INF < finite_values < INF */
3444 int
3445 vdef_percent_compar(a,b)
3446 const void *a,*b;
3447 {
3448 /* Equality is not returned; this doesn't hurt except
3449 * (maybe) for a little performance.
3450 */
3452 /* First catch NaN values. They are smallest */
3453 if (isnan( *(double *)a )) return -1;
3454 if (isnan( *(double *)b )) return 1;
3456 /* NaN doesn't reach this part so INF and -INF are extremes.
3457 * The sign from isinf() is compatible with the sign we return
3458 */
3459 if (isinf( *(double *)a )) return isinf( *(double *)a );
3460 if (isinf( *(double *)b )) return isinf( *(double *)b );
3462 /* If we reach this, both values must be finite */
3463 if ( *(double *)a < *(double *)b ) return -1; else return 1;
3464 }