0279d49d524cbee22831a1546e6528b5195e8fea
1 /****************************************************************************
2 * RRDtool 1.2rc2 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 #ifdef WIN32
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 */
30 #ifdef WIN32
31 char rrd_win_default_font[80];
32 #endif
34 #ifndef RRD_DEFAULT_FONT
35 /* there is special code later to pick Cour.ttf when running on windows */
36 #define RRD_DEFAULT_FONT "VeraMono.ttf"
37 #endif
39 text_prop_t text_prop[] = {
40 { 9.0, RRD_DEFAULT_FONT }, /* default */
41 { 11.0, RRD_DEFAULT_FONT }, /* title */
42 { 8.0, RRD_DEFAULT_FONT }, /* axis */
43 { 9.0, RRD_DEFAULT_FONT }, /* unit */
44 { 9.0, RRD_DEFAULT_FONT } /* legend */
45 };
47 xlab_t xlab[] = {
48 {0, TMT_SECOND,30, TMT_MINUTE,5, TMT_MINUTE,5, 0,"%H:%M"},
49 {2, TMT_MINUTE,1, TMT_MINUTE,5, TMT_MINUTE,5, 0,"%H:%M"},
50 {5, TMT_MINUTE,2, TMT_MINUTE,10, TMT_MINUTE,10, 0,"%H:%M"},
51 {10, TMT_MINUTE,5, TMT_MINUTE,20, TMT_MINUTE,20, 0,"%H:%M"},
52 {30, TMT_MINUTE,10, TMT_HOUR,1, TMT_HOUR,1, 0,"%H:%M"},
53 {60, TMT_MINUTE,30, TMT_HOUR,2, TMT_HOUR,2, 0,"%H:%M"},
54 {180, TMT_HOUR,1, TMT_HOUR,6, TMT_HOUR,6, 0,"%H:%M"},
55 /*{300, TMT_HOUR,3, TMT_HOUR,12, TMT_HOUR,12, 12*3600,"%a %p"}, this looks silly*/
56 {600, TMT_HOUR,6, TMT_DAY,1, TMT_DAY,1, 24*3600,"%a"},
57 {1800, TMT_HOUR,12, TMT_DAY,1, TMT_DAY,2, 24*3600,"%a"},
58 {3600, TMT_DAY,1, TMT_WEEK,1, TMT_WEEK,1, 7*24*3600,"Week %V"},
59 {3*3600, TMT_WEEK,1, TMT_MONTH,1, TMT_WEEK,2, 7*24*3600,"Week %V"},
60 {6*3600, TMT_MONTH,1, TMT_MONTH,1, TMT_MONTH,1, 30*24*3600,"%b"},
61 {48*3600, TMT_MONTH,1, TMT_MONTH,3, TMT_MONTH,3, 30*24*3600,"%b"},
62 {10*24*3600, TMT_YEAR,1, TMT_YEAR,1, TMT_YEAR,1, 365*24*3600,"%y"},
63 {-1,TMT_MONTH,0,TMT_MONTH,0,TMT_MONTH,0,0,""}
64 };
66 /* sensible logarithmic y label intervals ...
67 the first element of each row defines the possible starting points on the
68 y axis ... the other specify the */
70 double yloglab[][12]= {{ 1e9, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
71 { 1e3, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
72 { 1e1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
73 /* { 1e1, 1, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, */
74 { 1e1, 1, 2.5, 5, 7.5, 0, 0, 0, 0, 0, 0, 0 },
75 { 1e1, 1, 2, 4, 6, 8, 0, 0, 0, 0, 0, 0 },
76 { 1e1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0 },
77 { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }};
79 /* sensible y label intervals ...*/
81 ylab_t ylab[]= {
82 {0.1, {1,2, 5,10}},
83 {0.2, {1,5,10,20}},
84 {0.5, {1,2, 4,10}},
85 {1.0, {1,2, 5,10}},
86 {2.0, {1,5,10,20}},
87 {5.0, {1,2, 4,10}},
88 {10.0, {1,2, 5,10}},
89 {20.0, {1,5,10,20}},
90 {50.0, {1,2, 4,10}},
91 {100.0, {1,2, 5,10}},
92 {200.0, {1,5,10,20}},
93 {500.0, {1,2, 4,10}},
94 {0.0, {0,0,0,0}}};
97 gfx_color_t graph_col[] = /* default colors */
98 { 0xFFFFFFFF, /* canvas */
99 0xF0F0F0FF, /* background */
100 0xD0D0D0FF, /* shade A */
101 0xA0A0A0FF, /* shade B */
102 0x90909080, /* grid */
103 0xE0505080, /* major grid */
104 0x000000FF, /* font */
105 0xFF0000FF, /* arrow */
106 0x404040FF /* axis */
107 };
110 /* #define DEBUG */
112 #ifdef DEBUG
113 # define DPRINT(x) (void)(printf x, printf("\n"))
114 #else
115 # define DPRINT(x)
116 #endif
119 /* initialize with xtr(im,0); */
120 int
121 xtr(image_desc_t *im,time_t mytime){
122 static double pixie;
123 if (mytime==0){
124 pixie = (double) im->xsize / (double)(im->end - im->start);
125 return im->xorigin;
126 }
127 return (int)((double)im->xorigin
128 + pixie * ( mytime - im->start ) );
129 }
131 /* translate data values into y coordinates */
132 double
133 ytr(image_desc_t *im, double value){
134 static double pixie;
135 double yval;
136 if (isnan(value)){
137 if(!im->logarithmic)
138 pixie = (double) im->ysize / (im->maxval - im->minval);
139 else
140 pixie = (double) im->ysize / (log10(im->maxval) - log10(im->minval));
141 yval = im->yorigin;
142 } else if(!im->logarithmic) {
143 yval = im->yorigin - pixie * (value - im->minval);
144 } else {
145 if (value < im->minval) {
146 yval = im->yorigin;
147 } else {
148 yval = im->yorigin - pixie * (log10(value) - log10(im->minval));
149 }
150 }
151 /* make sure we don't return anything too unreasonable. GD lib can
152 get terribly slow when drawing lines outside its scope. This is
153 especially problematic in connection with the rigid option */
154 if (! im->rigid) {
155 /* keep yval as-is */
156 } else if (yval > im->yorigin) {
157 yval = im->yorigin+2;
158 } else if (yval < im->yorigin - im->ysize){
159 yval = im->yorigin - im->ysize - 2;
160 }
161 return yval;
162 }
166 /* conversion function for symbolic entry names */
169 #define conv_if(VV,VVV) \
170 if (strcmp(#VV, string) == 0) return VVV ;
172 enum gf_en gf_conv(char *string){
174 conv_if(PRINT,GF_PRINT)
175 conv_if(GPRINT,GF_GPRINT)
176 conv_if(COMMENT,GF_COMMENT)
177 conv_if(HRULE,GF_HRULE)
178 conv_if(VRULE,GF_VRULE)
179 conv_if(LINE,GF_LINE)
180 conv_if(AREA,GF_AREA)
181 conv_if(STACK,GF_STACK)
182 conv_if(TICK,GF_TICK)
183 conv_if(DEF,GF_DEF)
184 conv_if(CDEF,GF_CDEF)
185 conv_if(VDEF,GF_VDEF)
186 #ifdef WITH_PIECHART
187 conv_if(PART,GF_PART)
188 #endif
189 conv_if(XPORT,GF_XPORT)
190 conv_if(SHIFT,GF_SHIFT)
192 return (-1);
193 }
195 enum gfx_if_en if_conv(char *string){
197 conv_if(PNG,IF_PNG)
198 conv_if(SVG,IF_SVG)
199 conv_if(EPS,IF_EPS)
200 conv_if(PDF,IF_PDF)
202 return (-1);
203 }
205 enum tmt_en tmt_conv(char *string){
207 conv_if(SECOND,TMT_SECOND)
208 conv_if(MINUTE,TMT_MINUTE)
209 conv_if(HOUR,TMT_HOUR)
210 conv_if(DAY,TMT_DAY)
211 conv_if(WEEK,TMT_WEEK)
212 conv_if(MONTH,TMT_MONTH)
213 conv_if(YEAR,TMT_YEAR)
214 return (-1);
215 }
217 enum grc_en grc_conv(char *string){
219 conv_if(BACK,GRC_BACK)
220 conv_if(CANVAS,GRC_CANVAS)
221 conv_if(SHADEA,GRC_SHADEA)
222 conv_if(SHADEB,GRC_SHADEB)
223 conv_if(GRID,GRC_GRID)
224 conv_if(MGRID,GRC_MGRID)
225 conv_if(FONT,GRC_FONT)
226 conv_if(ARROW,GRC_ARROW)
227 conv_if(AXIS,GRC_AXIS)
229 return -1;
230 }
232 enum text_prop_en text_prop_conv(char *string){
234 conv_if(DEFAULT,TEXT_PROP_DEFAULT)
235 conv_if(TITLE,TEXT_PROP_TITLE)
236 conv_if(AXIS,TEXT_PROP_AXIS)
237 conv_if(UNIT,TEXT_PROP_UNIT)
238 conv_if(LEGEND,TEXT_PROP_LEGEND)
239 return -1;
240 }
243 #undef conv_if
245 int
246 im_free(image_desc_t *im)
247 {
248 unsigned long i,ii;
250 if (im == NULL) return 0;
251 for(i=0;i<(unsigned)im->gdes_c;i++){
252 if (im->gdes[i].data_first){
253 /* careful here, because a single pointer can occur several times */
254 free (im->gdes[i].data);
255 if (im->gdes[i].ds_namv){
256 for (ii=0;ii<im->gdes[i].ds_cnt;ii++)
257 free(im->gdes[i].ds_namv[ii]);
258 free(im->gdes[i].ds_namv);
259 }
260 }
261 free (im->gdes[i].p_data);
262 free (im->gdes[i].rpnp);
263 }
264 free(im->gdes);
265 gfx_destroy(im->canvas);
266 return 0;
267 }
269 /* find SI magnitude symbol for the given number*/
270 void
271 auto_scale(
272 image_desc_t *im, /* image description */
273 double *value,
274 char **symb_ptr,
275 double *magfact
276 )
277 {
279 char *symbol[] = {"a", /* 10e-18 Atto */
280 "f", /* 10e-15 Femto */
281 "p", /* 10e-12 Pico */
282 "n", /* 10e-9 Nano */
283 "u", /* 10e-6 Micro */
284 "m", /* 10e-3 Milli */
285 " ", /* Base */
286 "k", /* 10e3 Kilo */
287 "M", /* 10e6 Mega */
288 "G", /* 10e9 Giga */
289 "T", /* 10e12 Tera */
290 "P", /* 10e15 Peta */
291 "E"};/* 10e18 Exa */
293 int symbcenter = 6;
294 int sindex;
296 if (*value == 0.0 || isnan(*value) ) {
297 sindex = 0;
298 *magfact = 1.0;
299 } else {
300 sindex = floor(log(fabs(*value))/log((double)im->base));
301 *magfact = pow((double)im->base, (double)sindex);
302 (*value) /= (*magfact);
303 }
304 if ( sindex <= symbcenter && sindex >= -symbcenter) {
305 (*symb_ptr) = symbol[sindex+symbcenter];
306 }
307 else {
308 (*symb_ptr) = "?";
309 }
310 }
313 /* find SI magnitude symbol for the numbers on the y-axis*/
314 void
315 si_unit(
316 image_desc_t *im /* image description */
317 )
318 {
320 char symbol[] = {'a', /* 10e-18 Atto */
321 'f', /* 10e-15 Femto */
322 'p', /* 10e-12 Pico */
323 'n', /* 10e-9 Nano */
324 'u', /* 10e-6 Micro */
325 'm', /* 10e-3 Milli */
326 ' ', /* Base */
327 'k', /* 10e3 Kilo */
328 'M', /* 10e6 Mega */
329 'G', /* 10e9 Giga */
330 'T', /* 10e12 Tera */
331 'P', /* 10e15 Peta */
332 'E'};/* 10e18 Exa */
334 int symbcenter = 6;
335 double digits;
337 if (im->unitsexponent != 9999) {
338 /* unitsexponent = 9, 6, 3, 0, -3, -6, -9, etc */
339 digits = floor(im->unitsexponent / 3);
340 } else {
341 digits = floor( log( max( fabs(im->minval),fabs(im->maxval)))/log((double)im->base));
342 }
343 im->magfact = pow((double)im->base , digits);
345 #ifdef DEBUG
346 printf("digits %6.3f im->magfact %6.3f\n",digits,im->magfact);
347 #endif
349 if ( ((digits+symbcenter) < sizeof(symbol)) &&
350 ((digits+symbcenter) >= 0) )
351 im->symbol = symbol[(int)digits+symbcenter];
352 else
353 im->symbol = ' ';
354 }
356 /* move min and max values around to become sensible */
358 void
359 expand_range(image_desc_t *im)
360 {
361 double sensiblevalues[] ={1000.0,900.0,800.0,750.0,700.0,
362 600.0,500.0,400.0,300.0,250.0,
363 200.0,125.0,100.0,90.0,80.0,
364 75.0,70.0,60.0,50.0,40.0,30.0,
365 25.0,20.0,10.0,9.0,8.0,
366 7.0,6.0,5.0,4.0,3.5,3.0,
367 2.5,2.0,1.8,1.5,1.2,1.0,
368 0.8,0.7,0.6,0.5,0.4,0.3,0.2,0.1,0.0,-1};
370 double scaled_min,scaled_max;
371 double adj;
372 int i;
376 #ifdef DEBUG
377 printf("Min: %6.2f Max: %6.2f MagFactor: %6.2f\n",
378 im->minval,im->maxval,im->magfact);
379 #endif
381 if (isnan(im->ygridstep)){
382 if(im->extra_flags & ALTAUTOSCALE) {
383 /* measure the amplitude of the function. Make sure that
384 graph boundaries are slightly higher then max/min vals
385 so we can see amplitude on the graph */
386 double delt, fact;
388 delt = im->maxval - im->minval;
389 adj = delt * 0.1;
390 fact = 2.0 * pow(10.0,
391 floor(log10(max(fabs(im->minval), fabs(im->maxval)))) - 2);
392 if (delt < fact) {
393 adj = (fact - delt) * 0.55;
394 #ifdef DEBUG
395 printf("Min: %6.2f Max: %6.2f delt: %6.2f fact: %6.2f adj: %6.2f\n", im->minval, im->maxval, delt, fact, adj);
396 #endif
397 }
398 im->minval -= adj;
399 im->maxval += adj;
400 }
401 else if(im->extra_flags & ALTAUTOSCALE_MAX) {
402 /* measure the amplitude of the function. Make sure that
403 graph boundaries are slightly higher than max vals
404 so we can see amplitude on the graph */
405 adj = (im->maxval - im->minval) * 0.1;
406 im->maxval += adj;
407 }
408 else {
409 scaled_min = im->minval / im->magfact;
410 scaled_max = im->maxval / im->magfact;
412 for (i=1; sensiblevalues[i] > 0; i++){
413 if (sensiblevalues[i-1]>=scaled_min &&
414 sensiblevalues[i]<=scaled_min)
415 im->minval = sensiblevalues[i]*(im->magfact);
417 if (-sensiblevalues[i-1]<=scaled_min &&
418 -sensiblevalues[i]>=scaled_min)
419 im->minval = -sensiblevalues[i-1]*(im->magfact);
421 if (sensiblevalues[i-1] >= scaled_max &&
422 sensiblevalues[i] <= scaled_max)
423 im->maxval = sensiblevalues[i-1]*(im->magfact);
425 if (-sensiblevalues[i-1]<=scaled_max &&
426 -sensiblevalues[i] >=scaled_max)
427 im->maxval = -sensiblevalues[i]*(im->magfact);
428 }
429 }
430 } else {
431 /* adjust min and max to the grid definition if there is one */
432 im->minval = (double)im->ylabfact * im->ygridstep *
433 floor(im->minval / ((double)im->ylabfact * im->ygridstep));
434 im->maxval = (double)im->ylabfact * im->ygridstep *
435 ceil(im->maxval /( (double)im->ylabfact * im->ygridstep));
436 }
438 #ifdef DEBUG
439 fprintf(stderr,"SCALED Min: %6.2f Max: %6.2f Factor: %6.2f\n",
440 im->minval,im->maxval,im->magfact);
441 #endif
442 }
444 void
445 apply_gridfit(image_desc_t *im)
446 {
447 if (isnan(im->minval) || isnan(im->maxval))
448 return;
449 ytr(im,DNAN);
450 if (im->logarithmic) {
451 double ya, yb, ypix, ypixfrac;
452 double log10_range = log10(im->maxval) - log10(im->minval);
453 ya = pow((double)10, floor(log10(im->minval)));
454 while (ya < im->minval)
455 ya *= 10;
456 if (ya > im->maxval)
457 return; /* don't have y=10^x gridline */
458 yb = ya * 10;
459 if (yb <= im->maxval) {
460 /* we have at least 2 y=10^x gridlines.
461 Make sure distance between them in pixels
462 are an integer by expanding im->maxval */
463 double y_pixel_delta = ytr(im, ya) - ytr(im, yb);
464 double factor = y_pixel_delta / floor(y_pixel_delta);
465 double new_log10_range = factor * log10_range;
466 double new_ymax_log10 = log10(im->minval) + new_log10_range;
467 im->maxval = pow(10, new_ymax_log10);
468 ytr(im, DNAN); /* reset precalc */
469 log10_range = log10(im->maxval) - log10(im->minval);
470 }
471 /* make sure first y=10^x gridline is located on
472 integer pixel position by moving scale slightly
473 downwards (sub-pixel movement) */
474 ypix = ytr(im, ya) + im->ysize; /* add im->ysize so it always is positive */
475 ypixfrac = ypix - floor(ypix);
476 if (ypixfrac > 0 && ypixfrac < 1) {
477 double yfrac = ypixfrac / im->ysize;
478 im->minval = pow(10, log10(im->minval) - yfrac * log10_range);
479 im->maxval = pow(10, log10(im->maxval) - yfrac * log10_range);
480 ytr(im, DNAN); /* reset precalc */
481 }
482 } else {
483 /* Make sure we have an integer pixel distance between
484 each minor gridline */
485 double ypos1 = ytr(im, im->minval);
486 double ypos2 = ytr(im, im->minval + im->ygrid_scale.gridstep);
487 double y_pixel_delta = ypos1 - ypos2;
488 double factor = y_pixel_delta / floor(y_pixel_delta);
489 double new_range = factor * (im->maxval - im->minval);
490 double gridstep = im->ygrid_scale.gridstep;
491 double minor_y, minor_y_px, minor_y_px_frac;
492 im->maxval = im->minval + new_range;
493 ytr(im, DNAN); /* reset precalc */
494 /* make sure first minor gridline is on integer pixel y coord */
495 minor_y = gridstep * floor(im->minval / gridstep);
496 while (minor_y < im->minval)
497 minor_y += gridstep;
498 minor_y_px = ytr(im, minor_y) + im->ysize; /* ensure > 0 by adding ysize */
499 minor_y_px_frac = minor_y_px - floor(minor_y_px);
500 if (minor_y_px_frac > 0 && minor_y_px_frac < 1) {
501 double yfrac = minor_y_px_frac / im->ysize;
502 double range = im->maxval - im->minval;
503 im->minval = im->minval - yfrac * range;
504 im->maxval = im->maxval - yfrac * range;
505 ytr(im, DNAN); /* reset precalc */
506 }
507 calc_horizontal_grid(im); /* recalc with changed im->maxval */
508 }
509 }
511 /* reduce data reimplementation by Alex */
513 void
514 reduce_data(
515 enum cf_en cf, /* which consolidation function ?*/
516 unsigned long cur_step, /* step the data currently is in */
517 time_t *start, /* start, end and step as requested ... */
518 time_t *end, /* ... by the application will be ... */
519 unsigned long *step, /* ... adjusted to represent reality */
520 unsigned long *ds_cnt, /* number of data sources in file */
521 rrd_value_t **data) /* two dimensional array containing the data */
522 {
523 int i,reduce_factor = ceil((double)(*step) / (double)cur_step);
524 unsigned long col,dst_row,row_cnt,start_offset,end_offset,skiprows=0;
525 rrd_value_t *srcptr,*dstptr;
527 (*step) = cur_step*reduce_factor; /* set new step size for reduced data */
528 dstptr = *data;
529 srcptr = *data;
530 row_cnt = ((*end)-(*start))/cur_step;
532 #ifdef DEBUG
533 #define DEBUG_REDUCE
534 #endif
535 #ifdef DEBUG_REDUCE
536 printf("Reducing %lu rows with factor %i time %lu to %lu, step %lu\n",
537 row_cnt,reduce_factor,*start,*end,cur_step);
538 for (col=0;col<row_cnt;col++) {
539 printf("time %10lu: ",*start+(col+1)*cur_step);
540 for (i=0;i<*ds_cnt;i++)
541 printf(" %8.2e",srcptr[*ds_cnt*col+i]);
542 printf("\n");
543 }
544 #endif
546 /* We have to combine [reduce_factor] rows of the source
547 ** into one row for the destination. Doing this we also
548 ** need to take care to combine the correct rows. First
549 ** alter the start and end time so that they are multiples
550 ** of the new step time. We cannot reduce the amount of
551 ** time so we have to move the end towards the future and
552 ** the start towards the past.
553 */
554 end_offset = (*end) % (*step);
555 start_offset = (*start) % (*step);
557 /* If there is a start offset (which cannot be more than
558 ** one destination row), skip the appropriate number of
559 ** source rows and one destination row. The appropriate
560 ** number is what we do know (start_offset/cur_step) of
561 ** the new interval (*step/cur_step aka reduce_factor).
562 */
563 #ifdef DEBUG_REDUCE
564 printf("start_offset: %lu end_offset: %lu\n",start_offset,end_offset);
565 printf("row_cnt before: %lu\n",row_cnt);
566 #endif
567 if (start_offset) {
568 (*start) = (*start)-start_offset;
569 skiprows=reduce_factor-start_offset/cur_step;
570 srcptr+=skiprows* *ds_cnt;
571 for (col=0;col<(*ds_cnt);col++) *dstptr++ = DNAN;
572 row_cnt-=skiprows;
573 }
574 #ifdef DEBUG_REDUCE
575 printf("row_cnt between: %lu\n",row_cnt);
576 #endif
578 /* At the end we have some rows that are not going to be
579 ** used, the amount is end_offset/cur_step
580 */
581 if (end_offset) {
582 (*end) = (*end)-end_offset+(*step);
583 skiprows = end_offset/cur_step;
584 row_cnt-=skiprows;
585 }
586 #ifdef DEBUG_REDUCE
587 printf("row_cnt after: %lu\n",row_cnt);
588 #endif
590 /* Sanity check: row_cnt should be multiple of reduce_factor */
591 /* if this gets triggered, something is REALLY WRONG ... we die immediately */
593 if (row_cnt%reduce_factor) {
594 printf("SANITY CHECK: %lu rows cannot be reduced by %i \n",
595 row_cnt,reduce_factor);
596 printf("BUG in reduce_data()\n");
597 exit(1);
598 }
600 /* Now combine reduce_factor intervals at a time
601 ** into one interval for the destination.
602 */
604 for (dst_row=0;(long int)row_cnt>=reduce_factor;dst_row++) {
605 for (col=0;col<(*ds_cnt);col++) {
606 rrd_value_t newval=DNAN;
607 unsigned long validval=0;
609 for (i=0;i<reduce_factor;i++) {
610 if (isnan(srcptr[i*(*ds_cnt)+col])) {
611 continue;
612 }
613 validval++;
614 if (isnan(newval)) newval = srcptr[i*(*ds_cnt)+col];
615 else {
616 switch (cf) {
617 case CF_HWPREDICT:
618 case CF_DEVSEASONAL:
619 case CF_DEVPREDICT:
620 case CF_SEASONAL:
621 case CF_AVERAGE:
622 newval += srcptr[i*(*ds_cnt)+col];
623 break;
624 case CF_MINIMUM:
625 newval = min (newval,srcptr[i*(*ds_cnt)+col]);
626 break;
627 case CF_FAILURES:
628 /* an interval contains a failure if any subintervals contained a failure */
629 case CF_MAXIMUM:
630 newval = max (newval,srcptr[i*(*ds_cnt)+col]);
631 break;
632 case CF_LAST:
633 newval = srcptr[i*(*ds_cnt)+col];
634 break;
635 }
636 }
637 }
638 if (validval == 0){newval = DNAN;} else{
639 switch (cf) {
640 case CF_HWPREDICT:
641 case CF_DEVSEASONAL:
642 case CF_DEVPREDICT:
643 case CF_SEASONAL:
644 case CF_AVERAGE:
645 newval /= validval;
646 break;
647 case CF_MINIMUM:
648 case CF_FAILURES:
649 case CF_MAXIMUM:
650 case CF_LAST:
651 break;
652 }
653 }
654 *dstptr++=newval;
655 }
656 srcptr+=(*ds_cnt)*reduce_factor;
657 row_cnt-=reduce_factor;
658 }
659 /* If we had to alter the endtime, we didn't have enough
660 ** source rows to fill the last row. Fill it with NaN.
661 */
662 if (end_offset) for (col=0;col<(*ds_cnt);col++) *dstptr++ = DNAN;
663 #ifdef DEBUG_REDUCE
664 row_cnt = ((*end)-(*start))/ *step;
665 srcptr = *data;
666 printf("Done reducing. Currently %lu rows, time %lu to %lu, step %lu\n",
667 row_cnt,*start,*end,*step);
668 for (col=0;col<row_cnt;col++) {
669 printf("time %10lu: ",*start+(col+1)*(*step));
670 for (i=0;i<*ds_cnt;i++)
671 printf(" %8.2e",srcptr[*ds_cnt*col+i]);
672 printf("\n");
673 }
674 #endif
675 }
678 /* get the data required for the graphs from the
679 relevant rrds ... */
681 int
682 data_fetch(image_desc_t *im )
683 {
684 int i,ii;
685 int skip;
687 /* pull the data from the log files ... */
688 for (i=0;i< (int)im->gdes_c;i++){
689 /* only GF_DEF elements fetch data */
690 if (im->gdes[i].gf != GF_DEF)
691 continue;
693 skip=0;
694 /* do we have it already ?*/
695 for (ii=0;ii<i;ii++) {
696 if (im->gdes[ii].gf != GF_DEF)
697 continue;
698 if ((strcmp(im->gdes[i].rrd, im->gdes[ii].rrd) == 0)
699 && (im->gdes[i].cf == im->gdes[ii].cf)
700 && (im->gdes[i].cf_reduce == im->gdes[ii].cf_reduce)
701 && (im->gdes[i].start == im->gdes[ii].start)
702 && (im->gdes[i].end == im->gdes[ii].end)
703 && (im->gdes[i].step == im->gdes[ii].step)) {
704 /* OK, the data is already there.
705 ** Just copy the header portion
706 */
707 im->gdes[i].start = im->gdes[ii].start;
708 im->gdes[i].end = im->gdes[ii].end;
709 im->gdes[i].step = im->gdes[ii].step;
710 im->gdes[i].ds_cnt = im->gdes[ii].ds_cnt;
711 im->gdes[i].ds_namv = im->gdes[ii].ds_namv;
712 im->gdes[i].data = im->gdes[ii].data;
713 im->gdes[i].data_first = 0;
714 skip=1;
715 }
716 if (skip)
717 break;
718 }
719 if (! skip) {
720 unsigned long ft_step = im->gdes[i].step ;
722 if((rrd_fetch_fn(im->gdes[i].rrd,
723 im->gdes[i].cf,
724 &im->gdes[i].start,
725 &im->gdes[i].end,
726 &ft_step,
727 &im->gdes[i].ds_cnt,
728 &im->gdes[i].ds_namv,
729 &im->gdes[i].data)) == -1){
730 return -1;
731 }
732 im->gdes[i].data_first = 1;
733 im->gdes[i].step = im->step;
735 if (ft_step < im->gdes[i].step) {
736 reduce_data(im->gdes[i].cf_reduce,
737 ft_step,
738 &im->gdes[i].start,
739 &im->gdes[i].end,
740 &im->gdes[i].step,
741 &im->gdes[i].ds_cnt,
742 &im->gdes[i].data);
743 } else {
744 im->gdes[i].step = ft_step;
745 }
746 }
748 /* lets see if the required data source is really there */
749 for(ii=0;ii<(int)im->gdes[i].ds_cnt;ii++){
750 if(strcmp(im->gdes[i].ds_namv[ii],im->gdes[i].ds_nam) == 0){
751 im->gdes[i].ds=ii; }
752 }
753 if (im->gdes[i].ds== -1){
754 rrd_set_error("No DS called '%s' in '%s'",
755 im->gdes[i].ds_nam,im->gdes[i].rrd);
756 return -1;
757 }
759 }
760 return 0;
761 }
763 /* evaluate the expressions in the CDEF functions */
765 /*************************************************************
766 * CDEF stuff
767 *************************************************************/
769 long
770 find_var_wrapper(void *arg1, char *key)
771 {
772 return find_var((image_desc_t *) arg1, key);
773 }
775 /* find gdes containing var*/
776 long
777 find_var(image_desc_t *im, char *key){
778 long ii;
779 for(ii=0;ii<im->gdes_c-1;ii++){
780 if((im->gdes[ii].gf == GF_DEF
781 || im->gdes[ii].gf == GF_VDEF
782 || im->gdes[ii].gf == GF_CDEF)
783 && (strcmp(im->gdes[ii].vname,key) == 0)){
784 return ii;
785 }
786 }
787 return -1;
788 }
790 /* find the largest common denominator for all the numbers
791 in the 0 terminated num array */
792 long
793 lcd(long *num){
794 long rest;
795 int i;
796 for (i=0;num[i+1]!=0;i++){
797 do {
798 rest=num[i] % num[i+1];
799 num[i]=num[i+1]; num[i+1]=rest;
800 } while (rest!=0);
801 num[i+1] = num[i];
802 }
803 /* return i==0?num[i]:num[i-1]; */
804 return num[i];
805 }
807 /* run the rpn calculator on all the VDEF and CDEF arguments */
808 int
809 data_calc( image_desc_t *im){
811 int gdi;
812 int dataidx;
813 long *steparray, rpi;
814 int stepcnt;
815 time_t now;
816 rpnstack_t rpnstack;
818 rpnstack_init(&rpnstack);
820 for (gdi=0;gdi<im->gdes_c;gdi++){
821 /* Look for GF_VDEF and GF_CDEF in the same loop,
822 * so CDEFs can use VDEFs and vice versa
823 */
824 switch (im->gdes[gdi].gf) {
825 case GF_XPORT:
826 break;
827 case GF_SHIFT: {
828 graph_desc_t *vdp = &im->gdes[im->gdes[gdi].vidx];
830 /* remove current shift */
831 vdp->start -= vdp->shift;
832 vdp->end -= vdp->shift;
834 /* vdef */
835 if (im->gdes[gdi].shidx >= 0)
836 vdp->shift = im->gdes[im->gdes[gdi].shidx].vf.val;
837 /* constant */
838 else
839 vdp->shift = im->gdes[gdi].shval;
841 /* normalize shift to multiple of consolidated step */
842 vdp->shift = (vdp->shift / (long)vdp->step) * (long)vdp->step;
844 /* apply shift */
845 vdp->start += vdp->shift;
846 vdp->end += vdp->shift;
847 break;
848 }
849 case GF_VDEF:
850 /* A VDEF has no DS. This also signals other parts
851 * of rrdtool that this is a VDEF value, not a CDEF.
852 */
853 im->gdes[gdi].ds_cnt = 0;
854 if (vdef_calc(im,gdi)) {
855 rrd_set_error("Error processing VDEF '%s'"
856 ,im->gdes[gdi].vname
857 );
858 rpnstack_free(&rpnstack);
859 return -1;
860 }
861 break;
862 case GF_CDEF:
863 im->gdes[gdi].ds_cnt = 1;
864 im->gdes[gdi].ds = 0;
865 im->gdes[gdi].data_first = 1;
866 im->gdes[gdi].start = 0;
867 im->gdes[gdi].end = 0;
868 steparray=NULL;
869 stepcnt = 0;
870 dataidx=-1;
872 /* Find the variables in the expression.
873 * - VDEF variables are substituted by their values
874 * and the opcode is changed into OP_NUMBER.
875 * - CDEF variables are analized for their step size,
876 * the lowest common denominator of all the step
877 * sizes of the data sources involved is calculated
878 * and the resulting number is the step size for the
879 * resulting data source.
880 */
881 for(rpi=0;im->gdes[gdi].rpnp[rpi].op != OP_END;rpi++){
882 if(im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
883 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER){
884 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
885 if (im->gdes[ptr].ds_cnt == 0) {
886 #if 0
887 printf("DEBUG: inside CDEF '%s' processing VDEF '%s'\n",
888 im->gdes[gdi].vname,
889 im->gdes[ptr].vname);
890 printf("DEBUG: value from vdef is %f\n",im->gdes[ptr].vf.val);
891 #endif
892 im->gdes[gdi].rpnp[rpi].val = im->gdes[ptr].vf.val;
893 im->gdes[gdi].rpnp[rpi].op = OP_NUMBER;
894 } else {
895 if ((steparray =
896 rrd_realloc(steparray,
897 (++stepcnt+1)*sizeof(*steparray)))==NULL){
898 rrd_set_error("realloc steparray");
899 rpnstack_free(&rpnstack);
900 return -1;
901 };
903 steparray[stepcnt-1] = im->gdes[ptr].step;
905 /* adjust start and end of cdef (gdi) so
906 * that it runs from the latest start point
907 * to the earliest endpoint of any of the
908 * rras involved (ptr)
909 */
910 if(im->gdes[gdi].start < im->gdes[ptr].start)
911 im->gdes[gdi].start = im->gdes[ptr].start;
913 if(im->gdes[gdi].end == 0 ||
914 im->gdes[gdi].end > im->gdes[ptr].end)
915 im->gdes[gdi].end = im->gdes[ptr].end;
917 /* store pointer to the first element of
918 * the rra providing data for variable,
919 * further save step size and data source
920 * count of this rra
921 */
922 im->gdes[gdi].rpnp[rpi].data = im->gdes[ptr].data + im->gdes[ptr].ds;
923 im->gdes[gdi].rpnp[rpi].step = im->gdes[ptr].step;
924 im->gdes[gdi].rpnp[rpi].ds_cnt = im->gdes[ptr].ds_cnt;
926 /* backoff the *.data ptr; this is done so
927 * rpncalc() function doesn't have to treat
928 * the first case differently
929 */
930 } /* if ds_cnt != 0 */
931 } /* if OP_VARIABLE */
932 } /* loop through all rpi */
934 /* move the data pointers to the correct period */
935 for(rpi=0;im->gdes[gdi].rpnp[rpi].op != OP_END;rpi++){
936 if(im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
937 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER){
938 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
939 long diff = im->gdes[gdi].start - im->gdes[ptr].start;
941 if(diff > 0)
942 im->gdes[gdi].rpnp[rpi].data += (diff / im->gdes[ptr].step) * im->gdes[ptr].ds_cnt;
943 }
944 }
946 if(steparray == NULL){
947 rrd_set_error("rpn expressions without DEF"
948 " or CDEF variables are not supported");
949 rpnstack_free(&rpnstack);
950 return -1;
951 }
952 steparray[stepcnt]=0;
953 /* Now find the resulting step. All steps in all
954 * used RRAs have to be visited
955 */
956 im->gdes[gdi].step = lcd(steparray);
957 free(steparray);
958 if((im->gdes[gdi].data = malloc((
959 (im->gdes[gdi].end-im->gdes[gdi].start)
960 / im->gdes[gdi].step)
961 * sizeof(double)))==NULL){
962 rrd_set_error("malloc im->gdes[gdi].data");
963 rpnstack_free(&rpnstack);
964 return -1;
965 }
967 /* Step through the new cdef results array and
968 * calculate the values
969 */
970 for (now = im->gdes[gdi].start + im->gdes[gdi].step;
971 now<=im->gdes[gdi].end;
972 now += im->gdes[gdi].step)
973 {
974 rpnp_t *rpnp = im -> gdes[gdi].rpnp;
976 /* 3rd arg of rpn_calc is for OP_VARIABLE lookups;
977 * in this case we are advancing by timesteps;
978 * we use the fact that time_t is a synonym for long
979 */
980 if (rpn_calc(rpnp,&rpnstack,(long) now,
981 im->gdes[gdi].data,++dataidx) == -1) {
982 /* rpn_calc sets the error string */
983 rpnstack_free(&rpnstack);
984 return -1;
985 }
986 } /* enumerate over time steps within a CDEF */
987 break;
988 default:
989 continue;
990 }
991 } /* enumerate over CDEFs */
992 rpnstack_free(&rpnstack);
993 return 0;
994 }
996 /* massage data so, that we get one value for each x coordinate in the graph */
997 int
998 data_proc( image_desc_t *im ){
999 long i,ii;
1000 double pixstep = (double)(im->end-im->start)
1001 /(double)im->xsize; /* how much time
1002 passes in one pixel */
1003 double paintval;
1004 double minval=DNAN,maxval=DNAN;
1006 unsigned long gr_time;
1008 /* memory for the processed data */
1009 for(i=0;i<im->gdes_c;i++) {
1010 if((im->gdes[i].gf==GF_LINE) ||
1011 (im->gdes[i].gf==GF_AREA) ||
1012 (im->gdes[i].gf==GF_TICK) ||
1013 (im->gdes[i].gf==GF_STACK)) {
1014 if((im->gdes[i].p_data = malloc((im->xsize +1)
1015 * sizeof(rrd_value_t)))==NULL){
1016 rrd_set_error("malloc data_proc");
1017 return -1;
1018 }
1019 }
1020 }
1022 for (i=0;i<im->xsize;i++) { /* for each pixel */
1023 long vidx;
1024 gr_time = im->start+pixstep*i; /* time of the current step */
1025 paintval=0.0;
1027 for (ii=0;ii<im->gdes_c;ii++) {
1028 double value;
1029 switch (im->gdes[ii].gf) {
1030 case GF_LINE:
1031 case GF_AREA:
1032 case GF_TICK:
1033 if (!im->gdes[ii].stack)
1034 paintval = 0.0;
1035 case GF_STACK:
1036 value = im->gdes[ii].yrule;
1037 if (isnan(value) || (im->gdes[ii].gf == GF_TICK)) {
1038 /* The time of the data doesn't necessarily match
1039 ** the time of the graph. Beware.
1040 */
1041 vidx = im->gdes[ii].vidx;
1042 if (im->gdes[vidx].gf == GF_VDEF) {
1043 value = im->gdes[vidx].vf.val;
1044 } else if (((long int)gr_time >= (long int)im->gdes[vidx].start) &&
1045 ((long int)gr_time <= (long int)im->gdes[vidx].end) ) {
1046 value = im->gdes[vidx].data[
1047 (unsigned long) floor(
1048 (double)(gr_time - im->gdes[vidx].start)
1049 / im->gdes[vidx].step)
1050 * im->gdes[vidx].ds_cnt
1051 + im->gdes[vidx].ds
1052 ];
1053 } else {
1054 value = DNAN;
1055 }
1056 };
1058 if (! isnan(value)) {
1059 paintval += value;
1060 im->gdes[ii].p_data[i] = paintval;
1061 /* GF_TICK: the data values are not
1062 ** relevant for min and max
1063 */
1064 if (finite(paintval) && im->gdes[ii].gf != GF_TICK ) {
1065 if (isnan(minval) || paintval < minval)
1066 minval = paintval;
1067 if (isnan(maxval) || paintval > maxval)
1068 maxval = paintval;
1069 }
1070 } else {
1071 im->gdes[ii].p_data[i] = DNAN;
1072 }
1073 break;
1074 default:
1075 break;
1076 }
1077 }
1078 }
1080 /* if min or max have not been asigned a value this is because
1081 there was no data in the graph ... this is not good ...
1082 lets set these to dummy values then ... */
1084 if (isnan(minval)) minval = 0.0;
1085 if (isnan(maxval)) maxval = 1.0;
1087 /* adjust min and max values */
1088 if (isnan(im->minval)
1089 /* don't adjust low-end with log scale */
1090 || ((!im->logarithmic && !im->rigid) && im->minval > minval)
1091 )
1092 im->minval = minval;
1093 if (isnan(im->maxval)
1094 || (!im->rigid && im->maxval < maxval)
1095 ) {
1096 if (im->logarithmic)
1097 im->maxval = maxval * 1.1;
1098 else
1099 im->maxval = maxval;
1100 }
1101 /* make sure min is smaller than max */
1102 if (im->minval > im->maxval) {
1103 im->minval = 0.99 * im->maxval;
1104 }
1106 /* make sure min and max are not equal */
1107 if (im->minval == im->maxval) {
1108 im->maxval *= 1.01;
1109 if (! im->logarithmic) {
1110 im->minval *= 0.99;
1111 }
1112 /* make sure min and max are not both zero */
1113 if (im->maxval == 0.0) {
1114 im->maxval = 1.0;
1115 }
1116 }
1117 return 0;
1118 }
1122 /* identify the point where the first gridline, label ... gets placed */
1124 time_t
1125 find_first_time(
1126 time_t start, /* what is the initial time */
1127 enum tmt_en baseint, /* what is the basic interval */
1128 long basestep /* how many if these do we jump a time */
1129 )
1130 {
1131 struct tm tm;
1132 localtime_r(&start, &tm);
1133 switch(baseint){
1134 case TMT_SECOND:
1135 tm.tm_sec -= tm.tm_sec % basestep; break;
1136 case TMT_MINUTE:
1137 tm.tm_sec=0;
1138 tm.tm_min -= tm.tm_min % basestep;
1139 break;
1140 case TMT_HOUR:
1141 tm.tm_sec=0;
1142 tm.tm_min = 0;
1143 tm.tm_hour -= tm.tm_hour % basestep; break;
1144 case TMT_DAY:
1145 /* we do NOT look at the basestep for this ... */
1146 tm.tm_sec=0;
1147 tm.tm_min = 0;
1148 tm.tm_hour = 0; break;
1149 case TMT_WEEK:
1150 /* we do NOT look at the basestep for this ... */
1151 tm.tm_sec=0;
1152 tm.tm_min = 0;
1153 tm.tm_hour = 0;
1154 tm.tm_mday -= tm.tm_wday -1; /* -1 because we want the monday */
1155 if (tm.tm_wday==0) tm.tm_mday -= 7; /* we want the *previous* monday */
1156 break;
1157 case TMT_MONTH:
1158 tm.tm_sec=0;
1159 tm.tm_min = 0;
1160 tm.tm_hour = 0;
1161 tm.tm_mday = 1;
1162 tm.tm_mon -= tm.tm_mon % basestep; break;
1164 case TMT_YEAR:
1165 tm.tm_sec=0;
1166 tm.tm_min = 0;
1167 tm.tm_hour = 0;
1168 tm.tm_mday = 1;
1169 tm.tm_mon = 0;
1170 tm.tm_year -= (tm.tm_year+1900) % basestep;
1172 }
1173 return mktime(&tm);
1174 }
1175 /* identify the point where the next gridline, label ... gets placed */
1176 time_t
1177 find_next_time(
1178 time_t current, /* what is the initial time */
1179 enum tmt_en baseint, /* what is the basic interval */
1180 long basestep /* how many if these do we jump a time */
1181 )
1182 {
1183 struct tm tm;
1184 time_t madetime;
1185 localtime_r(¤t, &tm);
1186 do {
1187 switch(baseint){
1188 case TMT_SECOND:
1189 tm.tm_sec += basestep; break;
1190 case TMT_MINUTE:
1191 tm.tm_min += basestep; break;
1192 case TMT_HOUR:
1193 tm.tm_hour += basestep; break;
1194 case TMT_DAY:
1195 tm.tm_mday += basestep; break;
1196 case TMT_WEEK:
1197 tm.tm_mday += 7*basestep; break;
1198 case TMT_MONTH:
1199 tm.tm_mon += basestep; break;
1200 case TMT_YEAR:
1201 tm.tm_year += basestep;
1202 }
1203 madetime = mktime(&tm);
1204 } while (madetime == -1); /* this is necessary to skip impssible times
1205 like the daylight saving time skips */
1206 return madetime;
1208 }
1211 /* calculate values required for PRINT and GPRINT functions */
1213 int
1214 print_calc(image_desc_t *im, char ***prdata)
1215 {
1216 long i,ii,validsteps;
1217 double printval;
1218 time_t printtime;
1219 int graphelement = 0;
1220 long vidx;
1221 int max_ii;
1222 double magfact = -1;
1223 char *si_symb = "";
1224 char *percent_s;
1225 int prlines = 1;
1226 if (im->imginfo) prlines++;
1227 for(i=0;i<im->gdes_c;i++){
1228 switch(im->gdes[i].gf){
1229 case GF_PRINT:
1230 prlines++;
1231 if(((*prdata) = rrd_realloc((*prdata),prlines*sizeof(char *)))==NULL){
1232 rrd_set_error("realloc prdata");
1233 return 0;
1234 }
1235 case GF_GPRINT:
1236 /* PRINT and GPRINT can now print VDEF generated values.
1237 * There's no need to do any calculations on them as these
1238 * calculations were already made.
1239 */
1240 vidx = im->gdes[i].vidx;
1241 if (im->gdes[vidx].gf==GF_VDEF) { /* simply use vals */
1242 printval = im->gdes[vidx].vf.val;
1243 printtime = im->gdes[vidx].vf.when;
1244 } else { /* need to calculate max,min,avg etcetera */
1245 max_ii =((im->gdes[vidx].end
1246 - im->gdes[vidx].start)
1247 / im->gdes[vidx].step
1248 * im->gdes[vidx].ds_cnt);
1249 printval = DNAN;
1250 validsteps = 0;
1251 for( ii=im->gdes[vidx].ds;
1252 ii < max_ii;
1253 ii+=im->gdes[vidx].ds_cnt){
1254 if (! finite(im->gdes[vidx].data[ii]))
1255 continue;
1256 if (isnan(printval)){
1257 printval = im->gdes[vidx].data[ii];
1258 validsteps++;
1259 continue;
1260 }
1262 switch (im->gdes[i].cf){
1263 case CF_HWPREDICT:
1264 case CF_DEVPREDICT:
1265 case CF_DEVSEASONAL:
1266 case CF_SEASONAL:
1267 case CF_AVERAGE:
1268 validsteps++;
1269 printval += im->gdes[vidx].data[ii];
1270 break;
1271 case CF_MINIMUM:
1272 printval = min( printval, im->gdes[vidx].data[ii]);
1273 break;
1274 case CF_FAILURES:
1275 case CF_MAXIMUM:
1276 printval = max( printval, im->gdes[vidx].data[ii]);
1277 break;
1278 case CF_LAST:
1279 printval = im->gdes[vidx].data[ii];
1280 }
1281 }
1282 if (im->gdes[i].cf==CF_AVERAGE || im->gdes[i].cf > CF_LAST) {
1283 if (validsteps > 1) {
1284 printval = (printval / validsteps);
1285 }
1286 }
1287 } /* prepare printval */
1289 if (!strcmp(im->gdes[i].format,"%c")) { /* VDEF time print */
1290 char ctime_buf[128]; /* PS: for ctime_r, must be >= 26 chars */
1291 if (im->gdes[i].gf == GF_PRINT){
1292 (*prdata)[prlines-2] = malloc((FMT_LEG_LEN+2)*sizeof(char));
1293 sprintf((*prdata)[prlines-2],"%s (%lu)",
1294 ctime_r(&printtime,ctime_buf),printtime);
1295 (*prdata)[prlines-1] = NULL;
1296 } else {
1297 sprintf(im->gdes[i].legend,"%s (%lu)",
1298 ctime_r(&printtime,ctime_buf),printtime);
1299 graphelement = 1;
1300 }
1301 } else {
1302 if ((percent_s = strstr(im->gdes[i].format,"%S")) != NULL) {
1303 /* Magfact is set to -1 upon entry to print_calc. If it
1304 * is still less than 0, then we need to run auto_scale.
1305 * Otherwise, put the value into the correct units. If
1306 * the value is 0, then do not set the symbol or magnification
1307 * so next the calculation will be performed again. */
1308 if (magfact < 0.0) {
1309 auto_scale(im,&printval,&si_symb,&magfact);
1310 if (printval == 0.0)
1311 magfact = -1.0;
1312 } else {
1313 printval /= magfact;
1314 }
1315 *(++percent_s) = 's';
1316 } else if (strstr(im->gdes[i].format,"%s") != NULL) {
1317 auto_scale(im,&printval,&si_symb,&magfact);
1318 }
1320 if (im->gdes[i].gf == GF_PRINT){
1321 (*prdata)[prlines-2] = malloc((FMT_LEG_LEN+2)*sizeof(char));
1322 (*prdata)[prlines-1] = NULL;
1323 if (bad_format(im->gdes[i].format)) {
1324 rrd_set_error("bad format for PRINT in '%s'", im->gdes[i].format);
1325 return -1;
1326 }
1327 #ifdef HAVE_SNPRINTF
1328 snprintf((*prdata)[prlines-2],FMT_LEG_LEN,im->gdes[i].format,printval,si_symb);
1329 #else
1330 sprintf((*prdata)[prlines-2],im->gdes[i].format,printval,si_symb);
1331 #endif
1332 } else {
1333 /* GF_GPRINT */
1335 if (bad_format(im->gdes[i].format)) {
1336 rrd_set_error("bad format for GPRINT in '%s'", im->gdes[i].format);
1337 return -1;
1338 }
1339 #ifdef HAVE_SNPRINTF
1340 snprintf(im->gdes[i].legend,FMT_LEG_LEN-2,im->gdes[i].format,printval,si_symb);
1341 #else
1342 sprintf(im->gdes[i].legend,im->gdes[i].format,printval,si_symb);
1343 #endif
1344 graphelement = 1;
1345 }
1346 }
1347 break;
1348 case GF_LINE:
1349 case GF_AREA:
1350 case GF_TICK:
1351 case GF_STACK:
1352 case GF_HRULE:
1353 case GF_VRULE:
1354 graphelement = 1;
1355 break;
1356 case GF_COMMENT:
1357 case GF_DEF:
1358 case GF_CDEF:
1359 case GF_VDEF:
1360 #ifdef WITH_PIECHART
1361 case GF_PART:
1362 #endif
1363 case GF_SHIFT:
1364 case GF_XPORT:
1365 break;
1366 }
1367 }
1368 return graphelement;
1369 }
1372 /* place legends with color spots */
1373 int
1374 leg_place(image_desc_t *im)
1375 {
1376 /* graph labels */
1377 int interleg = im->text_prop[TEXT_PROP_LEGEND].size*2.0;
1378 int border = im->text_prop[TEXT_PROP_LEGEND].size*2.0;
1379 int fill=0, fill_last;
1380 int leg_c = 0;
1381 int leg_x = border, leg_y = im->yimg;
1382 int leg_cc;
1383 int glue = 0;
1384 int i,ii, mark = 0;
1385 char prt_fctn; /*special printfunctions */
1386 int *legspace;
1388 if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
1389 if ((legspace = malloc(im->gdes_c*sizeof(int)))==NULL){
1390 rrd_set_error("malloc for legspace");
1391 return -1;
1392 }
1394 for(i=0;i<im->gdes_c;i++){
1395 fill_last = fill;
1397 /* hid legends for rules which are not displayed */
1399 if(!(im->extra_flags & FORCE_RULES_LEGEND)) {
1400 if (im->gdes[i].gf == GF_HRULE &&
1401 (im->gdes[i].yrule < im->minval || im->gdes[i].yrule > im->maxval))
1402 im->gdes[i].legend[0] = '\0';
1404 if (im->gdes[i].gf == GF_VRULE &&
1405 (im->gdes[i].xrule < im->start || im->gdes[i].xrule > im->end))
1406 im->gdes[i].legend[0] = '\0';
1407 }
1409 leg_cc = strlen(im->gdes[i].legend);
1411 /* is there a controle code ant the end of the legend string ? */
1412 /* and it is not a tab \\t */
1413 if (leg_cc >= 2 && im->gdes[i].legend[leg_cc-2] == '\\' && im->gdes[i].legend[leg_cc-1] != 't') {
1414 prt_fctn = im->gdes[i].legend[leg_cc-1];
1415 leg_cc -= 2;
1416 im->gdes[i].legend[leg_cc] = '\0';
1417 } else {
1418 prt_fctn = '\0';
1419 }
1420 /* remove exess space */
1421 while (prt_fctn=='g' &&
1422 leg_cc > 0 &&
1423 im->gdes[i].legend[leg_cc-1]==' '){
1424 leg_cc--;
1425 im->gdes[i].legend[leg_cc]='\0';
1426 }
1427 if (leg_cc != 0 ){
1428 legspace[i]=(prt_fctn=='g' ? 0 : interleg);
1430 if (fill > 0){
1431 /* no interleg space if string ends in \g */
1432 fill += legspace[i];
1433 }
1434 fill += gfx_get_text_width(im->canvas, fill+border,
1435 im->text_prop[TEXT_PROP_LEGEND].font,
1436 im->text_prop[TEXT_PROP_LEGEND].size,
1437 im->tabwidth,
1438 im->gdes[i].legend, 0);
1439 leg_c++;
1440 } else {
1441 legspace[i]=0;
1442 }
1443 /* who said there was a special tag ... ?*/
1444 if (prt_fctn=='g') {
1445 prt_fctn = '\0';
1446 }
1447 if (prt_fctn == '\0') {
1448 if (i == im->gdes_c -1 ) prt_fctn ='l';
1450 /* is it time to place the legends ? */
1451 if (fill > im->ximg - 2*border){
1452 if (leg_c > 1) {
1453 /* go back one */
1454 i--;
1455 fill = fill_last;
1456 leg_c--;
1457 prt_fctn = 'j';
1458 } else {
1459 prt_fctn = 'l';
1460 }
1462 }
1463 }
1466 if (prt_fctn != '\0'){
1467 leg_x = border;
1468 if (leg_c >= 2 && prt_fctn == 'j') {
1469 glue = (im->ximg - fill - 2* border) / (leg_c-1);
1470 } else {
1471 glue = 0;
1472 }
1473 if (prt_fctn =='c') leg_x = (im->ximg - fill) / 2.0;
1474 if (prt_fctn =='r') leg_x = im->ximg - fill - border;
1476 for(ii=mark;ii<=i;ii++){
1477 if(im->gdes[ii].legend[0]=='\0')
1478 continue; /* skip empty legends */
1479 im->gdes[ii].leg_x = leg_x;
1480 im->gdes[ii].leg_y = leg_y;
1481 leg_x +=
1482 gfx_get_text_width(im->canvas, leg_x,
1483 im->text_prop[TEXT_PROP_LEGEND].font,
1484 im->text_prop[TEXT_PROP_LEGEND].size,
1485 im->tabwidth,
1486 im->gdes[ii].legend, 0)
1487 + legspace[ii]
1488 + glue;
1489 }
1490 leg_y += im->text_prop[TEXT_PROP_LEGEND].size*1.7;
1491 if (prt_fctn == 's') leg_y -= im->text_prop[TEXT_PROP_LEGEND].size;
1492 fill = 0;
1493 leg_c = 0;
1494 mark = ii;
1495 }
1496 }
1497 im->yimg = leg_y;
1498 free(legspace);
1499 }
1500 return 0;
1501 }
1503 /* create a grid on the graph. it determines what to do
1504 from the values of xsize, start and end */
1506 /* the xaxis labels are determined from the number of seconds per pixel
1507 in the requested graph */
1511 int
1512 calc_horizontal_grid(image_desc_t *im)
1513 {
1514 double range;
1515 double scaledrange;
1516 int pixel,i;
1517 int gridind;
1518 int decimals, fractionals;
1520 im->ygrid_scale.labfact=2;
1521 gridind=-1;
1522 range = im->maxval - im->minval;
1523 scaledrange = range / im->magfact;
1525 /* does the scale of this graph make it impossible to put lines
1526 on it? If so, give up. */
1527 if (isnan(scaledrange)) {
1528 return 0;
1529 }
1531 /* find grid spaceing */
1532 pixel=1;
1533 if(isnan(im->ygridstep)){
1534 if(im->extra_flags & ALTYGRID) {
1535 /* find the value with max number of digits. Get number of digits */
1536 decimals = ceil(log10(max(fabs(im->maxval), fabs(im->minval))));
1537 if(decimals <= 0) /* everything is small. make place for zero */
1538 decimals = 1;
1540 fractionals = floor(log10(range));
1541 if(fractionals < 0) /* small amplitude. */
1542 sprintf(im->ygrid_scale.labfmt, "%%%d.%df", decimals - fractionals + 1, -fractionals + 1);
1543 else
1544 sprintf(im->ygrid_scale.labfmt, "%%%d.1f", decimals + 1);
1545 im->ygrid_scale.gridstep = pow((double)10, (double)fractionals);
1546 if(im->ygrid_scale.gridstep == 0) /* range is one -> 0.1 is reasonable scale */
1547 im->ygrid_scale.gridstep = 0.1;
1548 /* should have at least 5 lines but no more then 15 */
1549 if(range/im->ygrid_scale.gridstep < 5)
1550 im->ygrid_scale.gridstep /= 10;
1551 if(range/im->ygrid_scale.gridstep > 15)
1552 im->ygrid_scale.gridstep *= 10;
1553 if(range/im->ygrid_scale.gridstep > 5) {
1554 im->ygrid_scale.labfact = 1;
1555 if(range/im->ygrid_scale.gridstep > 8)
1556 im->ygrid_scale.labfact = 2;
1557 }
1558 else {
1559 im->ygrid_scale.gridstep /= 5;
1560 im->ygrid_scale.labfact = 5;
1561 }
1562 }
1563 else {
1564 for(i=0;ylab[i].grid > 0;i++){
1565 pixel = im->ysize / (scaledrange / ylab[i].grid);
1566 if (gridind == -1 && pixel > 5) {
1567 gridind = i;
1568 break;
1569 }
1570 }
1572 for(i=0; i<4;i++) {
1573 if (pixel * ylab[gridind].lfac[i] >= 2 * im->text_prop[TEXT_PROP_AXIS].size) {
1574 im->ygrid_scale.labfact = ylab[gridind].lfac[i];
1575 break;
1576 }
1577 }
1579 im->ygrid_scale.gridstep = ylab[gridind].grid * im->magfact;
1580 }
1581 } else {
1582 im->ygrid_scale.gridstep = im->ygridstep;
1583 im->ygrid_scale.labfact = im->ylabfact;
1584 }
1585 return 1;
1586 }
1588 int draw_horizontal_grid(image_desc_t *im)
1589 {
1590 int i;
1591 double scaledstep;
1592 char graph_label[100];
1593 double X0=im->xorigin;
1594 double X1=im->xorigin+im->xsize;
1596 int sgrid = (int)( im->minval / im->ygrid_scale.gridstep - 1);
1597 int egrid = (int)( im->maxval / im->ygrid_scale.gridstep + 1);
1598 scaledstep = im->ygrid_scale.gridstep/im->magfact;
1599 for (i = sgrid; i <= egrid; i++){
1600 double Y0=ytr(im,im->ygrid_scale.gridstep*i);
1601 if ( Y0 >= im->yorigin-im->ysize
1602 && Y0 <= im->yorigin){
1603 if(i % im->ygrid_scale.labfact == 0){
1604 if (i==0 || im->symbol == ' ') {
1605 if(scaledstep < 1){
1606 if(im->extra_flags & ALTYGRID) {
1607 sprintf(graph_label,im->ygrid_scale.labfmt,scaledstep*i);
1608 }
1609 else {
1610 sprintf(graph_label,"%4.1f",scaledstep*i);
1611 }
1612 } else {
1613 sprintf(graph_label,"%4.0f",scaledstep*i);
1614 }
1615 }else {
1616 if(scaledstep < 1){
1617 sprintf(graph_label,"%4.1f %c",scaledstep*i, im->symbol);
1618 } else {
1619 sprintf(graph_label,"%4.0f %c",scaledstep*i, im->symbol);
1620 }
1621 }
1623 gfx_new_text ( im->canvas,
1624 X0-im->text_prop[TEXT_PROP_AXIS].size/1.5, Y0,
1625 im->graph_col[GRC_FONT],
1626 im->text_prop[TEXT_PROP_AXIS].font,
1627 im->text_prop[TEXT_PROP_AXIS].size,
1628 im->tabwidth, 0.0, GFX_H_RIGHT, GFX_V_CENTER,
1629 graph_label );
1630 gfx_new_dashed_line ( im->canvas,
1631 X0-2,Y0,
1632 X1+2,Y0,
1633 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1634 im->grid_dash_on, im->grid_dash_off);
1636 } else if (!(im->extra_flags & NOMINOR)) {
1637 gfx_new_dashed_line ( im->canvas,
1638 X0-1,Y0,
1639 X1+1,Y0,
1640 GRIDWIDTH, im->graph_col[GRC_GRID],
1641 im->grid_dash_on, im->grid_dash_off);
1643 }
1644 }
1645 }
1646 return 1;
1647 }
1649 /* logaritmic horizontal grid */
1650 int
1651 horizontal_log_grid(image_desc_t *im)
1652 {
1653 double pixpex;
1654 int ii,i;
1655 int minoridx=0, majoridx=0;
1656 char graph_label[100];
1657 double X0,X1,Y0;
1658 double value, pixperstep, minstep;
1660 /* find grid spaceing */
1661 pixpex= (double)im->ysize / (log10(im->maxval) - log10(im->minval));
1663 if (isnan(pixpex)) {
1664 return 0;
1665 }
1667 for(i=0;yloglab[i][0] > 0;i++){
1668 minstep = log10(yloglab[i][0]);
1669 for(ii=1;yloglab[i][ii+1] > 0;ii++){
1670 if(yloglab[i][ii+2]==0){
1671 minstep = log10(yloglab[i][ii+1])-log10(yloglab[i][ii]);
1672 break;
1673 }
1674 }
1675 pixperstep = pixpex * minstep;
1676 if(pixperstep > 5){minoridx = i;}
1677 if(pixperstep > 2 * im->text_prop[TEXT_PROP_LEGEND].size){majoridx = i;}
1678 }
1680 X0=im->xorigin;
1681 X1=im->xorigin+im->xsize;
1682 /* paint minor grid */
1683 for (value = pow((double)10, log10(im->minval)
1684 - fmod(log10(im->minval),log10(yloglab[minoridx][0])));
1685 value <= im->maxval;
1686 value *= yloglab[minoridx][0]){
1687 if (value < im->minval) continue;
1688 i=0;
1689 while(yloglab[minoridx][++i] > 0){
1690 Y0 = ytr(im,value * yloglab[minoridx][i]);
1691 if (Y0 <= im->yorigin - im->ysize) break;
1692 gfx_new_dashed_line ( im->canvas,
1693 X0-1,Y0,
1694 X1+1,Y0,
1695 GRIDWIDTH, im->graph_col[GRC_GRID],
1696 im->grid_dash_on, im->grid_dash_off);
1697 }
1698 }
1700 /* paint major grid and labels*/
1701 for (value = pow((double)10, log10(im->minval)
1702 - fmod(log10(im->minval),log10(yloglab[majoridx][0])));
1703 value <= im->maxval;
1704 value *= yloglab[majoridx][0]){
1705 if (value < im->minval) continue;
1706 i=0;
1707 while(yloglab[majoridx][++i] > 0){
1708 Y0 = ytr(im,value * yloglab[majoridx][i]);
1709 if (Y0 <= im->yorigin - im->ysize) break;
1710 gfx_new_dashed_line ( im->canvas,
1711 X0-2,Y0,
1712 X1+2,Y0,
1713 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1714 im->grid_dash_on, im->grid_dash_off);
1716 sprintf(graph_label,"%3.0e",value * yloglab[majoridx][i]);
1717 gfx_new_text ( im->canvas,
1718 X0-im->text_prop[TEXT_PROP_AXIS].size/1.5, Y0,
1719 im->graph_col[GRC_FONT],
1720 im->text_prop[TEXT_PROP_AXIS].font,
1721 im->text_prop[TEXT_PROP_AXIS].size,
1722 im->tabwidth,0.0, GFX_H_RIGHT, GFX_V_CENTER,
1723 graph_label );
1724 }
1725 }
1726 return 1;
1727 }
1730 void
1731 vertical_grid(
1732 image_desc_t *im )
1733 {
1734 int xlab_sel; /* which sort of label and grid ? */
1735 time_t ti, tilab, timajor;
1736 long factor;
1737 char graph_label[100];
1738 double X0,Y0,Y1; /* points for filled graph and more*/
1739 struct tm tm;
1741 /* the type of time grid is determined by finding
1742 the number of seconds per pixel in the graph */
1745 if(im->xlab_user.minsec == -1){
1746 factor=(im->end - im->start)/im->xsize;
1747 xlab_sel=0;
1748 while ( xlab[xlab_sel+1].minsec != -1
1749 && xlab[xlab_sel+1].minsec <= factor){ xlab_sel++; }
1750 im->xlab_user.gridtm = xlab[xlab_sel].gridtm;
1751 im->xlab_user.gridst = xlab[xlab_sel].gridst;
1752 im->xlab_user.mgridtm = xlab[xlab_sel].mgridtm;
1753 im->xlab_user.mgridst = xlab[xlab_sel].mgridst;
1754 im->xlab_user.labtm = xlab[xlab_sel].labtm;
1755 im->xlab_user.labst = xlab[xlab_sel].labst;
1756 im->xlab_user.precis = xlab[xlab_sel].precis;
1757 im->xlab_user.stst = xlab[xlab_sel].stst;
1758 }
1760 /* y coords are the same for every line ... */
1761 Y0 = im->yorigin;
1762 Y1 = im->yorigin-im->ysize;
1765 /* paint the minor grid */
1766 if (!(im->extra_flags & NOMINOR))
1767 {
1768 for(ti = find_first_time(im->start,
1769 im->xlab_user.gridtm,
1770 im->xlab_user.gridst),
1771 timajor = find_first_time(im->start,
1772 im->xlab_user.mgridtm,
1773 im->xlab_user.mgridst);
1774 ti < im->end;
1775 ti = find_next_time(ti,im->xlab_user.gridtm,im->xlab_user.gridst)
1776 ){
1777 /* are we inside the graph ? */
1778 if (ti < im->start || ti > im->end) continue;
1779 while (timajor < ti) {
1780 timajor = find_next_time(timajor,
1781 im->xlab_user.mgridtm, im->xlab_user.mgridst);
1782 }
1783 if (ti == timajor) continue; /* skip as falls on major grid line */
1784 X0 = xtr(im,ti);
1785 gfx_new_dashed_line(im->canvas,X0,Y0+1, X0,Y1-1,GRIDWIDTH,
1786 im->graph_col[GRC_GRID],
1787 im->grid_dash_on, im->grid_dash_off);
1789 }
1790 }
1792 /* paint the major grid */
1793 for(ti = find_first_time(im->start,
1794 im->xlab_user.mgridtm,
1795 im->xlab_user.mgridst);
1796 ti < im->end;
1797 ti = find_next_time(ti,im->xlab_user.mgridtm,im->xlab_user.mgridst)
1798 ){
1799 /* are we inside the graph ? */
1800 if (ti < im->start || ti > im->end) continue;
1801 X0 = xtr(im,ti);
1802 gfx_new_dashed_line(im->canvas,X0,Y0+3, X0,Y1-2,MGRIDWIDTH,
1803 im->graph_col[GRC_MGRID],
1804 im->grid_dash_on, im->grid_dash_off);
1806 }
1807 /* paint the labels below the graph */
1808 for(ti = find_first_time(im->start - im->xlab_user.precis/2,
1809 im->xlab_user.labtm,
1810 im->xlab_user.labst);
1811 ti <= im->end - im->xlab_user.precis/2;
1812 ti = find_next_time(ti,im->xlab_user.labtm,im->xlab_user.labst)
1813 ){
1814 tilab= ti + im->xlab_user.precis/2; /* correct time for the label */
1815 /* are we inside the graph ? */
1816 if (tilab < im->start || tilab > im->end) continue;
1818 #if HAVE_STRFTIME
1819 localtime_r(&tilab, &tm);
1820 strftime(graph_label,99,im->xlab_user.stst, &tm);
1821 #else
1822 # error "your libc has no strftime I guess we'll abort the exercise here."
1823 #endif
1824 gfx_new_text ( im->canvas,
1825 xtr(im,tilab), Y0+im->text_prop[TEXT_PROP_AXIS].size/1.5,
1826 im->graph_col[GRC_FONT],
1827 im->text_prop[TEXT_PROP_AXIS].font,
1828 im->text_prop[TEXT_PROP_AXIS].size,
1829 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_TOP,
1830 graph_label );
1832 }
1834 }
1837 void
1838 axis_paint(
1839 image_desc_t *im
1840 )
1841 {
1842 /* draw x and y axis */
1843 /* gfx_new_line ( im->canvas, im->xorigin+im->xsize,im->yorigin,
1844 im->xorigin+im->xsize,im->yorigin-im->ysize,
1845 GRIDWIDTH, im->graph_col[GRC_AXIS]);
1847 gfx_new_line ( im->canvas, im->xorigin,im->yorigin-im->ysize,
1848 im->xorigin+im->xsize,im->yorigin-im->ysize,
1849 GRIDWIDTH, im->graph_col[GRC_AXIS]); */
1851 gfx_new_line ( im->canvas, im->xorigin-4,im->yorigin,
1852 im->xorigin+im->xsize+4,im->yorigin,
1853 MGRIDWIDTH, im->graph_col[GRC_AXIS]);
1855 gfx_new_line ( im->canvas, im->xorigin,im->yorigin+4,
1856 im->xorigin,im->yorigin-im->ysize-4,
1857 MGRIDWIDTH, im->graph_col[GRC_AXIS]);
1860 /* arrow for X axis direction */
1861 gfx_new_area ( im->canvas,
1862 im->xorigin+im->xsize+3, im->yorigin-3,
1863 im->xorigin+im->xsize+3, im->yorigin+4,
1864 im->xorigin+im->xsize+8, im->yorigin+0.5, /* LINEOFFSET */
1865 im->graph_col[GRC_ARROW]);
1867 }
1869 void
1870 grid_paint(image_desc_t *im)
1871 {
1872 long i;
1873 int res=0;
1874 double X0,Y0; /* points for filled graph and more*/
1875 gfx_node_t *node;
1877 /* draw 3d border */
1878 node = gfx_new_area (im->canvas, 0,im->yimg,
1879 2,im->yimg-2,
1880 2,2,im->graph_col[GRC_SHADEA]);
1881 gfx_add_point( node , im->ximg - 2, 2 );
1882 gfx_add_point( node , im->ximg, 0 );
1883 gfx_add_point( node , 0,0 );
1884 /* gfx_add_point( node , 0,im->yimg ); */
1886 node = gfx_new_area (im->canvas, 2,im->yimg-2,
1887 im->ximg-2,im->yimg-2,
1888 im->ximg - 2, 2,
1889 im->graph_col[GRC_SHADEB]);
1890 gfx_add_point( node , im->ximg,0);
1891 gfx_add_point( node , im->ximg,im->yimg);
1892 gfx_add_point( node , 0,im->yimg);
1893 /* gfx_add_point( node , 0,im->yimg ); */
1896 if (im->draw_x_grid == 1 )
1897 vertical_grid(im);
1899 if (im->draw_y_grid == 1){
1900 if(im->logarithmic){
1901 res = horizontal_log_grid(im);
1902 } else {
1903 res = draw_horizontal_grid(im);
1904 }
1906 /* dont draw horizontal grid if there is no min and max val */
1907 if (! res ) {
1908 char *nodata = "No Data found";
1909 gfx_new_text(im->canvas,im->ximg/2, (2*im->yorigin-im->ysize) / 2,
1910 im->graph_col[GRC_FONT],
1911 im->text_prop[TEXT_PROP_AXIS].font,
1912 im->text_prop[TEXT_PROP_AXIS].size,
1913 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_CENTER,
1914 nodata );
1915 }
1916 }
1918 /* yaxis unit description */
1919 gfx_new_text( im->canvas,
1920 7, (im->yorigin - im->ysize/2),
1921 im->graph_col[GRC_FONT],
1922 im->text_prop[TEXT_PROP_UNIT].font,
1923 im->text_prop[TEXT_PROP_UNIT].size, im->tabwidth,
1924 RRDGRAPH_YLEGEND_ANGLE,
1925 GFX_H_LEFT, GFX_V_CENTER,
1926 im->ylegend);
1928 /* graph title */
1929 gfx_new_text( im->canvas,
1930 im->ximg/2, im->text_prop[TEXT_PROP_TITLE].size*1.2,
1931 im->graph_col[GRC_FONT],
1932 im->text_prop[TEXT_PROP_TITLE].font,
1933 im->text_prop[TEXT_PROP_TITLE].size, im->tabwidth, 0.0,
1934 GFX_H_CENTER, GFX_V_CENTER,
1935 im->title);
1937 /* graph labels */
1938 if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
1939 for(i=0;i<im->gdes_c;i++){
1940 if(im->gdes[i].legend[0] =='\0')
1941 continue;
1943 /* im->gdes[i].leg_y is the bottom of the legend */
1944 X0 = im->gdes[i].leg_x;
1945 Y0 = im->gdes[i].leg_y;
1946 gfx_new_text ( im->canvas, X0, Y0,
1947 im->graph_col[GRC_FONT],
1948 im->text_prop[TEXT_PROP_LEGEND].font,
1949 im->text_prop[TEXT_PROP_LEGEND].size,
1950 im->tabwidth,0.0, GFX_H_LEFT, GFX_V_BOTTOM,
1951 im->gdes[i].legend );
1952 /* The legend for GRAPH items starts with "M " to have
1953 enough space for the box */
1954 if ( im->gdes[i].gf != GF_PRINT &&
1955 im->gdes[i].gf != GF_GPRINT &&
1956 im->gdes[i].gf != GF_COMMENT) {
1957 int boxH, boxV;
1959 boxH = gfx_get_text_width(im->canvas, 0,
1960 im->text_prop[TEXT_PROP_LEGEND].font,
1961 im->text_prop[TEXT_PROP_LEGEND].size,
1962 im->tabwidth,"M", 0)*1.2;
1963 boxV = boxH;
1965 /* make sure transparent colors show up all the same */
1966 node = gfx_new_area(im->canvas,
1967 X0,Y0-boxV,
1968 X0,Y0,
1969 X0+boxH,Y0,
1970 im->graph_col[GRC_CANVAS]);
1971 gfx_add_point ( node, X0+boxH, Y0-boxV );
1973 node = gfx_new_area(im->canvas,
1974 X0,Y0-boxV,
1975 X0,Y0,
1976 X0+boxH,Y0,
1977 im->gdes[i].col);
1978 gfx_add_point ( node, X0+boxH, Y0-boxV );
1979 node = gfx_new_line(im->canvas,
1980 X0,Y0-boxV, X0,Y0,
1981 1,im->graph_col[GRC_FONT]);
1982 gfx_add_point(node,X0+boxH,Y0);
1983 gfx_add_point(node,X0+boxH,Y0-boxV);
1984 gfx_close_path(node);
1985 }
1986 }
1987 }
1988 }
1991 /*****************************************************
1992 * lazy check make sure we rely need to create this graph
1993 *****************************************************/
1995 int lazy_check(image_desc_t *im){
1996 FILE *fd = NULL;
1997 int size = 1;
1998 struct stat imgstat;
2000 if (im->lazy == 0) return 0; /* no lazy option */
2001 if (stat(im->graphfile,&imgstat) != 0)
2002 return 0; /* can't stat */
2003 /* one pixel in the existing graph is more then what we would
2004 change here ... */
2005 if (time(NULL) - imgstat.st_mtime >
2006 (im->end - im->start) / im->xsize)
2007 return 0;
2008 if ((fd = fopen(im->graphfile,"rb")) == NULL)
2009 return 0; /* the file does not exist */
2010 switch (im->canvas->imgformat) {
2011 case IF_PNG:
2012 size = PngSize(fd,&(im->ximg),&(im->yimg));
2013 break;
2014 default:
2015 size = 1;
2016 }
2017 fclose(fd);
2018 return size;
2019 }
2021 #ifdef WITH_PIECHART
2022 void
2023 pie_part(image_desc_t *im, gfx_color_t color,
2024 double PieCenterX, double PieCenterY, double Radius,
2025 double startangle, double endangle)
2026 {
2027 gfx_node_t *node;
2028 double angle;
2029 double step=M_PI/50; /* Number of iterations for the circle;
2030 ** 10 is definitely too low, more than
2031 ** 50 seems to be overkill
2032 */
2034 /* Strange but true: we have to work clockwise or else
2035 ** anti aliasing nor transparency don't work.
2036 **
2037 ** This test is here to make sure we do it right, also
2038 ** this makes the for...next loop more easy to implement.
2039 ** The return will occur if the user enters a negative number
2040 ** (which shouldn't be done according to the specs) or if the
2041 ** programmers do something wrong (which, as we all know, never
2042 ** happens anyway :)
2043 */
2044 if (endangle<startangle) return;
2046 /* Hidden feature: Radius decreases each full circle */
2047 angle=startangle;
2048 while (angle>=2*M_PI) {
2049 angle -= 2*M_PI;
2050 Radius *= 0.8;
2051 }
2053 node=gfx_new_area(im->canvas,
2054 PieCenterX+sin(startangle)*Radius,
2055 PieCenterY-cos(startangle)*Radius,
2056 PieCenterX,
2057 PieCenterY,
2058 PieCenterX+sin(endangle)*Radius,
2059 PieCenterY-cos(endangle)*Radius,
2060 color);
2061 for (angle=endangle;angle-startangle>=step;angle-=step) {
2062 gfx_add_point(node,
2063 PieCenterX+sin(angle)*Radius,
2064 PieCenterY-cos(angle)*Radius );
2065 }
2066 }
2068 #endif
2070 int
2071 graph_size_location(image_desc_t *im, int elements
2073 #ifdef WITH_PIECHART
2074 , int piechart
2075 #endif
2077 )
2078 {
2079 /* The actual size of the image to draw is determined from
2080 ** several sources. The size given on the command line is
2081 ** the graph area but we need more as we have to draw labels
2082 ** and other things outside the graph area
2083 */
2085 /* +-+-------------------------------------------+
2086 ** |l|.................title.....................|
2087 ** |e+--+-------------------------------+--------+
2088 ** |b| b| | |
2089 ** |a| a| | pie |
2090 ** |l| l| main graph area | chart |
2091 ** |.| .| | area |
2092 ** |t| y| | |
2093 ** |r+--+-------------------------------+--------+
2094 ** |e| | x-axis labels | |
2095 ** |v+--+-------------------------------+--------+
2096 ** | |..............legends......................|
2097 ** +-+-------------------------------------------+
2098 */
2099 int Xvertical=0, Yvertical=0,
2100 Xtitle =0, Ytitle =0,
2101 Xylabel =0, Yylabel =0,
2102 Xmain =0, Ymain =0,
2103 Xpie =0, Ypie =0,
2104 Xxlabel =0, Yxlabel =0,
2105 #if 0
2106 Xlegend =0, Ylegend =0,
2107 #endif
2108 Xspacing =10, Yspacing =10;
2110 if (im->extra_flags & ONLY_GRAPH) {
2111 Xspacing =0;
2112 Yspacing =0;
2113 } else {
2114 if (im->ylegend[0] != '\0') {
2115 Xvertical = im->text_prop[TEXT_PROP_UNIT].size *2;
2116 Yvertical = gfx_get_text_width(im->canvas, 0,
2117 im->text_prop[TEXT_PROP_UNIT].font,
2118 im->text_prop[TEXT_PROP_UNIT].size,
2119 im->tabwidth,im->ylegend, 0);
2120 }
2121 }
2123 if (im->title[0] != '\0') {
2124 /* The title is placed "inbetween" two text lines so it
2125 ** automatically has some vertical spacing. The horizontal
2126 ** spacing is added here, on each side.
2127 */
2128 Xtitle = gfx_get_text_width(im->canvas, 0,
2129 im->text_prop[TEXT_PROP_TITLE].font,
2130 im->text_prop[TEXT_PROP_TITLE].size,
2131 im->tabwidth,
2132 im->title, 0) + 2*Xspacing;
2133 Ytitle = im->text_prop[TEXT_PROP_TITLE].size*2.5;
2134 }
2136 if (elements) {
2137 Xmain=im->xsize;
2138 Ymain=im->ysize;
2139 if (im->draw_x_grid) {
2140 Xxlabel=Xmain;
2141 Yxlabel=im->text_prop[TEXT_PROP_AXIS].size *2.5;
2142 }
2143 if (im->draw_y_grid) {
2144 Xylabel=im->text_prop[TEXT_PROP_AXIS].size *6;
2145 Yylabel=Ymain;
2146 }
2147 }
2149 #ifdef WITH_PIECHART
2150 if (piechart) {
2151 im->piesize=im->xsize<im->ysize?im->xsize:im->ysize;
2152 Xpie=im->piesize;
2153 Ypie=im->piesize;
2154 }
2155 #endif
2157 /* Now calculate the total size. Insert some spacing where
2158 desired. im->xorigin and im->yorigin need to correspond
2159 with the lower left corner of the main graph area or, if
2160 this one is not set, the imaginary box surrounding the
2161 pie chart area. */
2163 /* The legend width cannot yet be determined, as a result we
2164 ** have problems adjusting the image to it. For now, we just
2165 ** forget about it at all; the legend will have to fit in the
2166 ** size already allocated.
2167 */
2168 im->ximg = Xmain;
2170 if ( !(im->extra_flags & ONLY_GRAPH) ) {
2171 im->ximg = Xylabel + Xmain + Xpie + 2 * Xspacing;
2172 }
2174 if (Xmain) im->ximg += Xspacing;
2175 if (Xpie) im->ximg += Xspacing;
2177 if (im->extra_flags & ONLY_GRAPH) {
2178 im->xorigin = 0;
2179 } else {
2180 im->xorigin = Xspacing + Xylabel;
2181 }
2183 if (Xtitle > im->ximg) im->ximg = Xtitle;
2184 if (Xvertical) {
2185 im->ximg += Xvertical;
2186 im->xorigin += Xvertical;
2187 }
2188 xtr(im,0);
2190 /* The vertical size is interesting... we need to compare
2191 ** the sum of {Ytitle, Ymain, Yxlabel, Ylegend} with Yvertical
2192 ** however we need to know {Ytitle+Ymain+Yxlabel} in order to
2193 ** start even thinking about Ylegend.
2194 **
2195 ** Do it in three portions: First calculate the inner part,
2196 ** then do the legend, then adjust the total height of the img.
2197 */
2199 /* reserve space for main and/or pie */
2201 if (im->extra_flags & ONLY_GRAPH) {
2202 im->yimg = Ymain;
2203 } else {
2204 im->yimg = Ymain + Yxlabel;
2205 }
2207 if (im->yimg < Ypie) im->yimg = Ypie;
2209 if (im->extra_flags & ONLY_GRAPH) {
2210 im->yorigin = im->yimg;
2211 } else {
2212 im->yorigin = im->yimg - Yxlabel;
2213 }
2215 /* reserve space for the title *or* some padding above the graph */
2216 if (Ytitle) {
2217 im->yimg += Ytitle;
2218 im->yorigin += Ytitle;
2219 } else {
2220 im->yimg += Yspacing;
2221 im->yorigin += Yspacing;
2222 }
2223 /* reserve space for padding below the graph */
2224 im->yimg += Yspacing;
2225 ytr(im,DNAN);
2227 /* Determine where to place the legends onto the image.
2228 ** Adjust im->yimg to match the space requirements.
2229 */
2230 if(leg_place(im)==-1)
2231 return -1;
2233 /* last of three steps: check total height of image */
2234 if (im->yimg < Yvertical) im->yimg = Yvertical;
2236 #if 0
2237 if (Xlegend > im->ximg) {
2238 im->ximg = Xlegend;
2239 /* reposition Pie */
2240 }
2241 #endif
2243 #ifdef WITH_PIECHART
2244 /* The pie is placed in the upper right hand corner,
2245 ** just below the title (if any) and with sufficient
2246 ** padding.
2247 */
2248 if (elements) {
2249 im->pie_x = im->ximg - Xspacing - Xpie/2;
2250 im->pie_y = im->yorigin-Ymain+Ypie/2;
2251 } else {
2252 im->pie_x = im->ximg/2;
2253 im->pie_y = im->yorigin-Ypie/2;
2254 }
2255 #endif
2257 return 0;
2258 }
2260 /* draw that picture thing ... */
2261 int
2262 graph_paint(image_desc_t *im, char ***calcpr)
2263 {
2264 int i,ii;
2265 int lazy = lazy_check(im);
2266 #ifdef WITH_PIECHART
2267 int piechart = 0;
2268 double PieStart=0.0;
2269 #endif
2270 FILE *fo;
2271 gfx_node_t *node;
2273 double areazero = 0.0;
2274 enum gf_en stack_gf = GF_PRINT;
2275 graph_desc_t *lastgdes = NULL;
2277 /* if we are lazy and there is nothing to PRINT ... quit now */
2278 if (lazy && im->prt_c==0) return 0;
2280 /* pull the data from the rrd files ... */
2282 if(data_fetch(im)==-1)
2283 return -1;
2285 /* evaluate VDEF and CDEF operations ... */
2286 if(data_calc(im)==-1)
2287 return -1;
2289 #ifdef WITH_PIECHART
2290 /* check if we need to draw a piechart */
2291 for(i=0;i<im->gdes_c;i++){
2292 if (im->gdes[i].gf == GF_PART) {
2293 piechart=1;
2294 break;
2295 }
2296 }
2297 #endif
2299 /* calculate and PRINT and GPRINT definitions. We have to do it at
2300 * this point because it will affect the length of the legends
2301 * if there are no graph elements we stop here ...
2302 * if we are lazy, try to quit ...
2303 */
2304 i=print_calc(im,calcpr);
2305 if(i<0) return -1;
2306 if(((i==0)
2307 #ifdef WITH_PIECHART
2308 &&(piechart==0)
2309 #endif
2310 ) || lazy) return 0;
2312 #ifdef WITH_PIECHART
2313 /* If there's only the pie chart to draw, signal this */
2314 if (i==0) piechart=2;
2315 #endif
2317 /* get actual drawing data and find min and max values*/
2318 if(data_proc(im)==-1)
2319 return -1;
2321 if(!im->logarithmic){si_unit(im);} /* identify si magnitude Kilo, Mega Giga ? */
2323 if(!im->rigid && ! im->logarithmic)
2324 expand_range(im); /* make sure the upper and lower limit are
2325 sensible values */
2327 if (!calc_horizontal_grid(im))
2328 return -1;
2330 if (im->gridfit)
2331 apply_gridfit(im);
2334 /**************************************************************
2335 *** Calculating sizes and locations became a bit confusing ***
2336 *** so I moved this into a separate function. ***
2337 **************************************************************/
2338 if(graph_size_location(im,i
2339 #ifdef WITH_PIECHART
2340 ,piechart
2341 #endif
2342 )==-1)
2343 return -1;
2345 /* the actual graph is created by going through the individual
2346 graph elements and then drawing them */
2348 node=gfx_new_area ( im->canvas,
2349 0, 0,
2350 im->ximg, 0,
2351 im->ximg, im->yimg,
2352 im->graph_col[GRC_BACK]);
2354 gfx_add_point(node,0, im->yimg);
2356 #ifdef WITH_PIECHART
2357 if (piechart != 2) {
2358 #endif
2359 node=gfx_new_area ( im->canvas,
2360 im->xorigin, im->yorigin,
2361 im->xorigin + im->xsize, im->yorigin,
2362 im->xorigin + im->xsize, im->yorigin-im->ysize,
2363 im->graph_col[GRC_CANVAS]);
2365 gfx_add_point(node,im->xorigin, im->yorigin - im->ysize);
2367 if (im->minval > 0.0)
2368 areazero = im->minval;
2369 if (im->maxval < 0.0)
2370 areazero = im->maxval;
2371 #ifdef WITH_PIECHART
2372 }
2373 #endif
2375 #ifdef WITH_PIECHART
2376 if (piechart) {
2377 pie_part(im,im->graph_col[GRC_CANVAS],im->pie_x,im->pie_y,im->piesize*0.5,0,2*M_PI);
2378 }
2379 #endif
2381 for(i=0;i<im->gdes_c;i++){
2382 switch(im->gdes[i].gf){
2383 case GF_CDEF:
2384 case GF_VDEF:
2385 case GF_DEF:
2386 case GF_PRINT:
2387 case GF_GPRINT:
2388 case GF_COMMENT:
2389 case GF_HRULE:
2390 case GF_VRULE:
2391 case GF_XPORT:
2392 case GF_SHIFT:
2393 break;
2394 case GF_TICK:
2395 for (ii = 0; ii < im->xsize; ii++)
2396 {
2397 if (!isnan(im->gdes[i].p_data[ii]) &&
2398 im->gdes[i].p_data[ii] > 0.0)
2399 {
2400 /* generate a tick */
2401 gfx_new_line(im->canvas, im -> xorigin + ii,
2402 im -> yorigin - (im -> gdes[i].yrule * im -> ysize),
2403 im -> xorigin + ii,
2404 im -> yorigin,
2405 1.0,
2406 im -> gdes[i].col );
2407 }
2408 }
2409 break;
2410 case GF_LINE:
2411 case GF_AREA:
2412 stack_gf = im->gdes[i].gf;
2413 case GF_STACK:
2414 /* fix data points at oo and -oo */
2415 for(ii=0;ii<im->xsize;ii++){
2416 if (isinf(im->gdes[i].p_data[ii])){
2417 if (im->gdes[i].p_data[ii] > 0) {
2418 im->gdes[i].p_data[ii] = im->maxval ;
2419 } else {
2420 im->gdes[i].p_data[ii] = im->minval ;
2421 }
2423 }
2424 } /* for */
2426 if (im->gdes[i].col != 0x0){
2427 /* GF_LINE and friend */
2428 if(stack_gf == GF_LINE ){
2429 node = NULL;
2430 for(ii=1;ii<im->xsize;ii++){
2431 if ( ! isnan(im->gdes[i].p_data[ii-1])
2432 && ! isnan(im->gdes[i].p_data[ii])){
2433 if (node == NULL){
2434 node = gfx_new_line(im->canvas,
2435 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii-1]),
2436 ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]),
2437 im->gdes[i].linewidth,
2438 im->gdes[i].col);
2439 } else {
2440 gfx_add_point(node,ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]));
2441 }
2442 } else {
2443 node = NULL;
2444 }
2445 }
2446 } else {
2447 int area_start=-1;
2448 node = NULL;
2449 for(ii=1;ii<im->xsize;ii++){
2450 /* open an area */
2451 if ( ! isnan(im->gdes[i].p_data[ii-1])
2452 && ! isnan(im->gdes[i].p_data[ii])){
2453 if (node == NULL){
2454 float ybase = 0.0;
2455 /*
2456 if (im->gdes[i].gf == GF_STACK) {
2457 */
2458 if ( (im->gdes[i].gf == GF_STACK)
2459 || (im->gdes[i].stack) ) {
2461 ybase = ytr(im,lastgdes->p_data[ii-1]);
2462 } else {
2463 ybase = ytr(im,areazero);
2464 }
2465 area_start = ii-1;
2466 node = gfx_new_area(im->canvas,
2467 ii-1+im->xorigin,ybase,
2468 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii-1]),
2469 ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]),
2470 im->gdes[i].col
2471 );
2472 } else {
2473 gfx_add_point(node,ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]));
2474 }
2475 }
2477 if ( node != NULL && (ii+1==im->xsize || isnan(im->gdes[i].p_data[ii]) )){
2478 /* GF_AREA STACK type*/
2479 /*
2480 if (im->gdes[i].gf == GF_STACK ) {
2481 */
2482 if ( (im->gdes[i].gf == GF_STACK)
2483 || (im->gdes[i].stack) ) {
2484 int iii;
2485 for (iii=ii-1;iii>area_start;iii--){
2486 gfx_add_point(node,iii+im->xorigin,ytr(im,lastgdes->p_data[iii]));
2487 }
2488 } else {
2489 gfx_add_point(node,ii+im->xorigin,ytr(im,areazero));
2490 };
2491 node=NULL;
2492 };
2493 }
2494 } /* else GF_LINE */
2495 } /* if color != 0x0 */
2496 /* make sure we do not run into trouble when stacking on NaN */
2497 for(ii=0;ii<im->xsize;ii++){
2498 if (isnan(im->gdes[i].p_data[ii])) {
2499 if (lastgdes && (im->gdes[i].gf == GF_STACK)) {
2500 im->gdes[i].p_data[ii] = lastgdes->p_data[ii];
2501 } else {
2502 im->gdes[i].p_data[ii] = ytr(im,areazero);
2503 }
2504 }
2505 }
2506 lastgdes = &(im->gdes[i]);
2507 break;
2508 #ifdef WITH_PIECHART
2509 case GF_PART:
2510 if(isnan(im->gdes[i].yrule)) /* fetch variable */
2511 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2513 if (finite(im->gdes[i].yrule)) { /* even the fetched var can be NaN */
2514 pie_part(im,im->gdes[i].col,
2515 im->pie_x,im->pie_y,im->piesize*0.4,
2516 M_PI*2.0*PieStart/100.0,
2517 M_PI*2.0*(PieStart+im->gdes[i].yrule)/100.0);
2518 PieStart += im->gdes[i].yrule;
2519 }
2520 break;
2521 #endif
2523 } /* switch */
2524 }
2525 #ifdef WITH_PIECHART
2526 if (piechart==2) {
2527 im->draw_x_grid=0;
2528 im->draw_y_grid=0;
2529 }
2530 #endif
2532 if( !(im->extra_flags & ONLY_GRAPH) )
2533 axis_paint(im);
2535 /* grid_paint also does the text */
2536 if( !(im->extra_flags & ONLY_GRAPH) )
2537 grid_paint(im);
2539 /* the RULES are the last thing to paint ... */
2540 for(i=0;i<im->gdes_c;i++){
2542 switch(im->gdes[i].gf){
2543 case GF_HRULE:
2544 if(isnan(im->gdes[i].yrule)) { /* fetch variable */
2545 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2546 };
2547 if(im->gdes[i].yrule >= im->minval
2548 && im->gdes[i].yrule <= im->maxval)
2549 gfx_new_line(im->canvas,
2550 im->xorigin,ytr(im,im->gdes[i].yrule),
2551 im->xorigin+im->xsize,ytr(im,im->gdes[i].yrule),
2552 1.0,im->gdes[i].col);
2553 break;
2554 case GF_VRULE:
2555 if(im->gdes[i].xrule == 0) { /* fetch variable */
2556 im->gdes[i].xrule = im->gdes[im->gdes[i].vidx].vf.when;
2557 };
2558 if(im->gdes[i].xrule >= im->start
2559 && im->gdes[i].xrule <= im->end)
2560 gfx_new_line(im->canvas,
2561 xtr(im,im->gdes[i].xrule),im->yorigin,
2562 xtr(im,im->gdes[i].xrule),im->yorigin-im->ysize,
2563 1.0,im->gdes[i].col);
2564 break;
2565 default:
2566 break;
2567 }
2568 }
2571 if (strcmp(im->graphfile,"-")==0) {
2572 fo = im->graphhandle ? im->graphhandle : stdout;
2573 #ifdef WIN32
2574 /* Change translation mode for stdout to BINARY */
2575 _setmode( _fileno( fo ), O_BINARY );
2576 #endif
2577 } else {
2578 if ((fo = fopen(im->graphfile,"wb")) == NULL) {
2579 rrd_set_error("Opening '%s' for write: %s",im->graphfile,
2580 rrd_strerror(errno));
2581 return (-1);
2582 }
2583 }
2584 gfx_render (im->canvas,im->ximg,im->yimg,0x0,fo);
2585 if (strcmp(im->graphfile,"-") != 0)
2586 fclose(fo);
2587 return 0;
2588 }
2591 /*****************************************************
2592 * graph stuff
2593 *****************************************************/
2595 int
2596 gdes_alloc(image_desc_t *im){
2598 im->gdes_c++;
2599 if ((im->gdes = (graph_desc_t *) rrd_realloc(im->gdes, (im->gdes_c)
2600 * sizeof(graph_desc_t)))==NULL){
2601 rrd_set_error("realloc graph_descs");
2602 return -1;
2603 }
2606 im->gdes[im->gdes_c-1].step=im->step;
2607 im->gdes[im->gdes_c-1].stack=0;
2608 im->gdes[im->gdes_c-1].debug=0;
2609 im->gdes[im->gdes_c-1].start=im->start;
2610 im->gdes[im->gdes_c-1].end=im->end;
2611 im->gdes[im->gdes_c-1].vname[0]='\0';
2612 im->gdes[im->gdes_c-1].data=NULL;
2613 im->gdes[im->gdes_c-1].ds_namv=NULL;
2614 im->gdes[im->gdes_c-1].data_first=0;
2615 im->gdes[im->gdes_c-1].p_data=NULL;
2616 im->gdes[im->gdes_c-1].rpnp=NULL;
2617 im->gdes[im->gdes_c-1].shift=0;
2618 im->gdes[im->gdes_c-1].col = 0x0;
2619 im->gdes[im->gdes_c-1].legend[0]='\0';
2620 im->gdes[im->gdes_c-1].format[0]='\0';
2621 im->gdes[im->gdes_c-1].rrd[0]='\0';
2622 im->gdes[im->gdes_c-1].ds=-1;
2623 im->gdes[im->gdes_c-1].p_data=NULL;
2624 im->gdes[im->gdes_c-1].yrule=DNAN;
2625 im->gdes[im->gdes_c-1].xrule=0;
2626 return 0;
2627 }
2629 /* copies input untill the first unescaped colon is found
2630 or until input ends. backslashes have to be escaped as well */
2631 int
2632 scan_for_col(char *input, int len, char *output)
2633 {
2634 int inp,outp=0;
2635 for (inp=0;
2636 inp < len &&
2637 input[inp] != ':' &&
2638 input[inp] != '\0';
2639 inp++){
2640 if (input[inp] == '\\' &&
2641 input[inp+1] != '\0' &&
2642 (input[inp+1] == '\\' ||
2643 input[inp+1] == ':')){
2644 output[outp++] = input[++inp];
2645 }
2646 else {
2647 output[outp++] = input[inp];
2648 }
2649 }
2650 output[outp] = '\0';
2651 return inp;
2652 }
2653 /* Some surgery done on this function, it became ridiculously big.
2654 ** Things moved:
2655 ** - initializing now in rrd_graph_init()
2656 ** - options parsing now in rrd_graph_options()
2657 ** - script parsing now in rrd_graph_script()
2658 */
2659 int
2660 rrd_graph(int argc, char **argv, char ***prdata, int *xsize, int *ysize, FILE *stream, double *ymin, double *ymax)
2661 {
2662 image_desc_t im;
2664 rrd_graph_init(&im);
2665 im.graphhandle = stream;
2667 rrd_graph_options(argc,argv,&im);
2668 if (rrd_test_error()) {
2669 im_free(&im);
2670 return -1;
2671 }
2673 if (strlen(argv[optind])>=MAXPATH) {
2674 rrd_set_error("filename (including path) too long");
2675 im_free(&im);
2676 return -1;
2677 }
2678 strncpy(im.graphfile,argv[optind],MAXPATH-1);
2679 im.graphfile[MAXPATH-1]='\0';
2681 rrd_graph_script(argc,argv,&im,1);
2682 if (rrd_test_error()) {
2683 im_free(&im);
2684 return -1;
2685 }
2687 /* Everything is now read and the actual work can start */
2689 (*prdata)=NULL;
2690 if (graph_paint(&im,prdata)==-1){
2691 im_free(&im);
2692 return -1;
2693 }
2695 /* The image is generated and needs to be output.
2696 ** Also, if needed, print a line with information about the image.
2697 */
2699 *xsize=im.ximg;
2700 *ysize=im.yimg;
2701 *ymin=im.minval;
2702 *ymax=im.maxval;
2703 if (im.imginfo) {
2704 char *filename;
2705 if (!(*prdata)) {
2706 /* maybe prdata is not allocated yet ... lets do it now */
2707 if ((*prdata = calloc(2,sizeof(char *)))==NULL) {
2708 rrd_set_error("malloc imginfo");
2709 return -1;
2710 };
2711 }
2712 if(((*prdata)[0] = malloc((strlen(im.imginfo)+200+strlen(im.graphfile))*sizeof(char)))
2713 ==NULL){
2714 rrd_set_error("malloc imginfo");
2715 return -1;
2716 }
2717 filename=im.graphfile+strlen(im.graphfile);
2718 while(filename > im.graphfile) {
2719 if (*(filename-1)=='/' || *(filename-1)=='\\' ) break;
2720 filename--;
2721 }
2723 sprintf((*prdata)[0],im.imginfo,filename,(long)(im.canvas->zoom*im.ximg),(long)(im.canvas->zoom*im.yimg));
2724 }
2725 im_free(&im);
2726 return 0;
2727 }
2729 void
2730 rrd_graph_init(image_desc_t *im)
2731 {
2732 unsigned int i;
2734 #ifdef HAVE_TZSET
2735 tzset();
2736 #endif
2737 #ifdef HAVE_SETLOCALE
2738 setlocale(LC_TIME,"");
2739 #endif
2741 im->xlab_user.minsec = -1;
2742 im->ximg=0;
2743 im->yimg=0;
2744 im->xsize = 400;
2745 im->ysize = 100;
2746 im->step = 0;
2747 im->ylegend[0] = '\0';
2748 im->title[0] = '\0';
2749 im->minval = DNAN;
2750 im->maxval = DNAN;
2751 im->unitsexponent= 9999;
2752 im->extra_flags= 0;
2753 im->rigid = 0;
2754 im->gridfit = 1;
2755 im->imginfo = NULL;
2756 im->lazy = 0;
2757 im->logarithmic = 0;
2758 im->ygridstep = DNAN;
2759 im->draw_x_grid = 1;
2760 im->draw_y_grid = 1;
2761 im->base = 1000;
2762 im->prt_c = 0;
2763 im->gdes_c = 0;
2764 im->gdes = NULL;
2765 im->canvas = gfx_new_canvas();
2766 im->grid_dash_on = 1;
2767 im->grid_dash_off = 1;
2768 im->tabwidth = 40.0;
2770 for(i=0;i<DIM(graph_col);i++)
2771 im->graph_col[i]=graph_col[i];
2772 #ifdef WIN32
2773 {
2774 char *windir;
2775 windir = getenv("windir");
2776 /* %windir% is something like D:\windows or C:\winnt */
2777 if (windir != NULL) {
2778 strcpy(rrd_win_default_font,windir);
2779 strcat(rrd_win_default_font,"\\fonts\\cour.ttf");
2780 for(i=0;i<DIM(text_prop);i++)
2781 strcpy(text_prop[i].font,rrd_win_default_font);
2782 }
2783 }
2784 #endif
2785 for(i=0;i<DIM(text_prop);i++){
2786 im->text_prop[i].size = text_prop[i].size;
2787 strcpy(im->text_prop[i].font,text_prop[i].font);
2788 }
2789 }
2791 void
2792 rrd_graph_options(int argc, char *argv[],image_desc_t *im)
2793 {
2794 int stroff;
2795 char *parsetime_error = NULL;
2796 char scan_gtm[12],scan_mtm[12],scan_ltm[12],col_nam[12];
2797 time_t start_tmp=0,end_tmp=0;
2798 long long_tmp;
2799 struct rrd_time_value start_tv, end_tv;
2800 gfx_color_t color;
2802 parsetime("end-24h", &start_tv);
2803 parsetime("now", &end_tv);
2805 while (1){
2806 static struct option long_options[] =
2807 {
2808 {"start", required_argument, 0, 's'},
2809 {"end", required_argument, 0, 'e'},
2810 {"x-grid", required_argument, 0, 'x'},
2811 {"y-grid", required_argument, 0, 'y'},
2812 {"vertical-label",required_argument,0,'v'},
2813 {"width", required_argument, 0, 'w'},
2814 {"height", required_argument, 0, 'h'},
2815 {"interlaced", no_argument, 0, 'i'},
2816 {"upper-limit",required_argument, 0, 'u'},
2817 {"lower-limit",required_argument, 0, 'l'},
2818 {"rigid", no_argument, 0, 'r'},
2819 {"base", required_argument, 0, 'b'},
2820 {"logarithmic",no_argument, 0, 'o'},
2821 {"color", required_argument, 0, 'c'},
2822 {"font", required_argument, 0, 'n'},
2823 {"title", required_argument, 0, 't'},
2824 {"imginfo", required_argument, 0, 'f'},
2825 {"imgformat", required_argument, 0, 'a'},
2826 {"lazy", no_argument, 0, 'z'},
2827 {"zoom", required_argument, 0, 'm'},
2828 {"no-legend", no_argument, 0, 'g'},
2829 {"force-rules-legend",no_argument,0, 'F'},
2830 {"only-graph", no_argument, 0, 'j'},
2831 {"alt-y-grid", no_argument, 0, 'Y'},
2832 {"no-minor", no_argument, 0, 'I'},
2833 {"alt-autoscale", no_argument, 0, 'A'},
2834 {"alt-autoscale-max", no_argument, 0, 'M'},
2835 {"units-exponent",required_argument, 0, 'X'},
2836 {"step", required_argument, 0, 'S'},
2837 {"tabwidth", required_argument, 0, 'T'},
2838 {"no-gridfit", no_argument, 0, 'N'},
2839 {0,0,0,0}};
2840 int option_index = 0;
2841 int opt;
2844 opt = getopt_long(argc, argv,
2845 "s:e:x:y:v:w:h:iu:l:rb:oc:n:m:t:f:a:I:zgjFYAMX:S:NT:",
2846 long_options, &option_index);
2848 if (opt == EOF)
2849 break;
2851 switch(opt) {
2852 case 'I':
2853 im->extra_flags |= NOMINOR;
2854 break;
2855 case 'Y':
2856 im->extra_flags |= ALTYGRID;
2857 break;
2858 case 'A':
2859 im->extra_flags |= ALTAUTOSCALE;
2860 break;
2861 case 'M':
2862 im->extra_flags |= ALTAUTOSCALE_MAX;
2863 break;
2864 case 'j':
2865 im->extra_flags |= ONLY_GRAPH;
2866 break;
2867 case 'g':
2868 im->extra_flags |= NOLEGEND;
2869 break;
2870 case 'F':
2871 im->extra_flags |= FORCE_RULES_LEGEND;
2872 break;
2873 case 'X':
2874 im->unitsexponent = atoi(optarg);
2875 break;
2876 case 'T':
2877 im->tabwidth = atof(optarg);
2878 break;
2879 case 'S':
2880 im->step = atoi(optarg);
2881 break;
2882 case 262:
2883 im->gridfit = 0;
2884 break;
2885 case 's':
2886 if ((parsetime_error = parsetime(optarg, &start_tv))) {
2887 rrd_set_error( "start time: %s", parsetime_error );
2888 return;
2889 }
2890 break;
2891 case 'e':
2892 if ((parsetime_error = parsetime(optarg, &end_tv))) {
2893 rrd_set_error( "end time: %s", parsetime_error );
2894 return;
2895 }
2896 break;
2897 case 'x':
2898 if(strcmp(optarg,"none") == 0){
2899 im->draw_x_grid=0;
2900 break;
2901 };
2903 if(sscanf(optarg,
2904 "%10[A-Z]:%ld:%10[A-Z]:%ld:%10[A-Z]:%ld:%ld:%n",
2905 scan_gtm,
2906 &im->xlab_user.gridst,
2907 scan_mtm,
2908 &im->xlab_user.mgridst,
2909 scan_ltm,
2910 &im->xlab_user.labst,
2911 &im->xlab_user.precis,
2912 &stroff) == 7 && stroff != 0){
2913 strncpy(im->xlab_form, optarg+stroff, sizeof(im->xlab_form) - 1);
2914 if((int)(im->xlab_user.gridtm = tmt_conv(scan_gtm)) == -1){
2915 rrd_set_error("unknown keyword %s",scan_gtm);
2916 return;
2917 } else if ((int)(im->xlab_user.mgridtm = tmt_conv(scan_mtm)) == -1){
2918 rrd_set_error("unknown keyword %s",scan_mtm);
2919 return;
2920 } else if ((int)(im->xlab_user.labtm = tmt_conv(scan_ltm)) == -1){
2921 rrd_set_error("unknown keyword %s",scan_ltm);
2922 return;
2923 }
2924 im->xlab_user.minsec = 1;
2925 im->xlab_user.stst = im->xlab_form;
2926 } else {
2927 rrd_set_error("invalid x-grid format");
2928 return;
2929 }
2930 break;
2931 case 'y':
2933 if(strcmp(optarg,"none") == 0){
2934 im->draw_y_grid=0;
2935 break;
2936 };
2938 if(sscanf(optarg,
2939 "%lf:%d",
2940 &im->ygridstep,
2941 &im->ylabfact) == 2) {
2942 if(im->ygridstep<=0){
2943 rrd_set_error("grid step must be > 0");
2944 return;
2945 } else if (im->ylabfact < 1){
2946 rrd_set_error("label factor must be > 0");
2947 return;
2948 }
2949 } else {
2950 rrd_set_error("invalid y-grid format");
2951 return;
2952 }
2953 break;
2954 case 'v':
2955 strncpy(im->ylegend,optarg,150);
2956 im->ylegend[150]='\0';
2957 break;
2958 case 'u':
2959 im->maxval = atof(optarg);
2960 break;
2961 case 'l':
2962 im->minval = atof(optarg);
2963 break;
2964 case 'b':
2965 im->base = atol(optarg);
2966 if(im->base != 1024 && im->base != 1000 ){
2967 rrd_set_error("the only sensible value for base apart from 1000 is 1024");
2968 return;
2969 }
2970 break;
2971 case 'w':
2972 long_tmp = atol(optarg);
2973 if (long_tmp < 10) {
2974 rrd_set_error("width below 10 pixels");
2975 return;
2976 }
2977 im->xsize = long_tmp;
2978 break;
2979 case 'h':
2980 long_tmp = atol(optarg);
2981 if (long_tmp < 10) {
2982 rrd_set_error("height below 10 pixels");
2983 return;
2984 }
2985 im->ysize = long_tmp;
2986 break;
2987 case 'i':
2988 im->canvas->interlaced = 1;
2989 break;
2990 case 'r':
2991 im->rigid = 1;
2992 break;
2993 case 'f':
2994 im->imginfo = optarg;
2995 break;
2996 case 'a':
2997 if((int)(im->canvas->imgformat = if_conv(optarg)) == -1) {
2998 rrd_set_error("unsupported graphics format '%s'",optarg);
2999 return;
3000 }
3001 break;
3002 case 'z':
3003 im->lazy = 1;
3004 break;
3005 case 'o':
3006 im->logarithmic = 1;
3007 if (isnan(im->minval))
3008 im->minval=1;
3009 break;
3010 case 'c':
3011 if(sscanf(optarg,
3012 "%10[A-Z]#%8lx",
3013 col_nam,&color) == 2){
3014 int ci;
3015 if((ci=grc_conv(col_nam)) != -1){
3016 im->graph_col[ci]=color;
3017 } else {
3018 rrd_set_error("invalid color name '%s'",col_nam);
3019 }
3020 } else {
3021 rrd_set_error("invalid color def format");
3022 return;
3023 }
3024 break;
3025 case 'n':{
3026 char prop[15];
3027 double size = 1;
3028 char font[1024];
3030 if(sscanf(optarg,
3031 "%10[A-Z]:%lf:%1000s",
3032 prop,&size,font) == 3){
3033 int sindex;
3034 if((sindex=text_prop_conv(prop)) != -1){
3035 im->text_prop[sindex].size=size;
3036 strcpy(im->text_prop[sindex].font,font);
3037 if (sindex==0) { /* the default */
3038 im->text_prop[TEXT_PROP_TITLE].size=size;
3039 strcpy(im->text_prop[TEXT_PROP_TITLE].font,font);
3040 im->text_prop[TEXT_PROP_AXIS].size=size;
3041 strcpy(im->text_prop[TEXT_PROP_AXIS].font,font);
3042 im->text_prop[TEXT_PROP_UNIT].size=size;
3043 strcpy(im->text_prop[TEXT_PROP_UNIT].font,font);
3044 im->text_prop[TEXT_PROP_LEGEND].size=size;
3045 strcpy(im->text_prop[TEXT_PROP_LEGEND].font,font);
3046 }
3047 } else {
3048 rrd_set_error("invalid fonttag '%s'",prop);
3049 return;
3050 }
3051 } else {
3052 rrd_set_error("invalid text property format");
3053 return;
3054 }
3055 break;
3056 }
3057 case 'm':
3058 im->canvas->zoom = atof(optarg);
3059 if (im->canvas->zoom <= 0.0) {
3060 rrd_set_error("zoom factor must be > 0");
3061 return;
3062 }
3063 break;
3064 case 't':
3065 strncpy(im->title,optarg,150);
3066 im->title[150]='\0';
3067 break;
3069 case '?':
3070 if (optopt != 0)
3071 rrd_set_error("unknown option '%c'", optopt);
3072 else
3073 rrd_set_error("unknown option '%s'",argv[optind-1]);
3074 return;
3075 }
3076 }
3078 if (optind >= argc) {
3079 rrd_set_error("missing filename");
3080 return;
3081 }
3083 if (im->logarithmic == 1 && (im->minval <= 0 || isnan(im->minval))){
3084 rrd_set_error("for a logarithmic yaxis you must specify a lower-limit > 0");
3085 return;
3086 }
3088 if (proc_start_end(&start_tv,&end_tv,&start_tmp,&end_tmp) == -1){
3089 /* error string is set in parsetime.c */
3090 return;
3091 }
3093 if (start_tmp < 3600*24*365*10){
3094 rrd_set_error("the first entry to fetch should be after 1980 (%ld)",start_tmp);
3095 return;
3096 }
3098 if (end_tmp < start_tmp) {
3099 rrd_set_error("start (%ld) should be less than end (%ld)",
3100 start_tmp, end_tmp);
3101 return;
3102 }
3104 im->start = start_tmp;
3105 im->end = end_tmp;
3106 im->step = max((long)im->step, (im->end-im->start)/im->xsize);
3107 }
3109 int
3110 rrd_graph_check_vname(image_desc_t *im, char *varname, char *err)
3111 {
3112 if ((im->gdes[im->gdes_c-1].vidx=find_var(im,varname))==-1) {
3113 rrd_set_error("Unknown variable '%s' in %s",varname,err);
3114 return -1;
3115 }
3116 return 0;
3117 }
3118 int
3119 rrd_graph_color(image_desc_t *im, char *var, char *err, int optional)
3120 {
3121 char *color;
3122 graph_desc_t *gdp=&im->gdes[im->gdes_c-1];
3124 color=strstr(var,"#");
3125 if (color==NULL) {
3126 if (optional==0) {
3127 rrd_set_error("Found no color in %s",err);
3128 return 0;
3129 }
3130 return 0;
3131 } else {
3132 int n=0;
3133 char *rest;
3134 gfx_color_t col;
3136 rest=strstr(color,":");
3137 if (rest!=NULL)
3138 n=rest-color;
3139 else
3140 n=strlen(color);
3142 switch (n) {
3143 case 7:
3144 sscanf(color,"#%6lx%n",&col,&n);
3145 col = (col << 8) + 0xff /* shift left by 8 */;
3146 if (n!=7) rrd_set_error("Color problem in %s",err);
3147 break;
3148 case 9:
3149 sscanf(color,"#%8lx%n",&col,&n);
3150 if (n==9) break;
3151 default:
3152 rrd_set_error("Color problem in %s",err);
3153 }
3154 if (rrd_test_error()) return 0;
3155 gdp->col = col;
3156 return n;
3157 }
3158 }
3161 int bad_format(char *fmt) {
3162 char *ptr;
3163 int n=0;
3164 ptr = fmt;
3165 while (*ptr != '\0')
3166 if (*ptr++ == '%') {
3168 /* line cannot end with percent char */
3169 if (*ptr == '\0') return 1;
3171 /* '%s', '%S' and '%%' are allowed */
3172 if (*ptr == 's' || *ptr == 'S' || *ptr == '%') ptr++;
3174 /* or else '% 6.2lf' and such are allowed */
3175 else {
3177 /* optional padding character */
3178 if (*ptr == ' ' || *ptr == '+' || *ptr == '-') ptr++;
3180 /* This should take care of 'm.n' with all three optional */
3181 while (*ptr >= '0' && *ptr <= '9') ptr++;
3182 if (*ptr == '.') ptr++;
3183 while (*ptr >= '0' && *ptr <= '9') ptr++;
3185 /* Either 'le', 'lf' or 'lg' must follow here */
3186 if (*ptr++ != 'l') return 1;
3187 if (*ptr == 'e' || *ptr == 'f' || *ptr == 'g') ptr++;
3188 else return 1;
3189 n++;
3190 }
3191 }
3193 return (n!=1);
3194 }
3197 int
3198 vdef_parse(gdes,str)
3199 struct graph_desc_t *gdes;
3200 char *str;
3201 {
3202 /* A VDEF currently is either "func" or "param,func"
3203 * so the parsing is rather simple. Change if needed.
3204 */
3205 double param;
3206 char func[30];
3207 int n;
3209 n=0;
3210 sscanf(str,"%le,%29[A-Z]%n",¶m,func,&n);
3211 if (n== (int)strlen(str)) { /* matched */
3212 ;
3213 } else {
3214 n=0;
3215 sscanf(str,"%29[A-Z]%n",func,&n);
3216 if (n== (int)strlen(str)) { /* matched */
3217 param=DNAN;
3218 } else {
3219 rrd_set_error("Unknown function string '%s' in VDEF '%s'"
3220 ,str
3221 ,gdes->vname
3222 );
3223 return -1;
3224 }
3225 }
3226 if (!strcmp("PERCENT",func)) gdes->vf.op = VDEF_PERCENT;
3227 else if (!strcmp("MAXIMUM",func)) gdes->vf.op = VDEF_MAXIMUM;
3228 else if (!strcmp("AVERAGE",func)) gdes->vf.op = VDEF_AVERAGE;
3229 else if (!strcmp("MINIMUM",func)) gdes->vf.op = VDEF_MINIMUM;
3230 else if (!strcmp("TOTAL", func)) gdes->vf.op = VDEF_TOTAL;
3231 else if (!strcmp("FIRST", func)) gdes->vf.op = VDEF_FIRST;
3232 else if (!strcmp("LAST", func)) gdes->vf.op = VDEF_LAST;
3233 else {
3234 rrd_set_error("Unknown function '%s' in VDEF '%s'\n"
3235 ,func
3236 ,gdes->vname
3237 );
3238 return -1;
3239 };
3241 switch (gdes->vf.op) {
3242 case VDEF_PERCENT:
3243 if (isnan(param)) { /* no parameter given */
3244 rrd_set_error("Function '%s' needs parameter in VDEF '%s'\n"
3245 ,func
3246 ,gdes->vname
3247 );
3248 return -1;
3249 };
3250 if (param>=0.0 && param<=100.0) {
3251 gdes->vf.param = param;
3252 gdes->vf.val = DNAN; /* undefined */
3253 gdes->vf.when = 0; /* undefined */
3254 } else {
3255 rrd_set_error("Parameter '%f' out of range in VDEF '%s'\n"
3256 ,param
3257 ,gdes->vname
3258 );
3259 return -1;
3260 };
3261 break;
3262 case VDEF_MAXIMUM:
3263 case VDEF_AVERAGE:
3264 case VDEF_MINIMUM:
3265 case VDEF_TOTAL:
3266 case VDEF_FIRST:
3267 case VDEF_LAST:
3268 if (isnan(param)) {
3269 gdes->vf.param = DNAN;
3270 gdes->vf.val = DNAN;
3271 gdes->vf.when = 0;
3272 } else {
3273 rrd_set_error("Function '%s' needs no parameter in VDEF '%s'\n"
3274 ,func
3275 ,gdes->vname
3276 );
3277 return -1;
3278 };
3279 break;
3280 };
3281 return 0;
3282 }
3285 int
3286 vdef_calc(im,gdi)
3287 image_desc_t *im;
3288 int gdi;
3289 {
3290 graph_desc_t *src,*dst;
3291 rrd_value_t *data;
3292 long step,steps;
3294 dst = &im->gdes[gdi];
3295 src = &im->gdes[dst->vidx];
3296 data = src->data + src->ds;
3297 steps = (src->end - src->start) / src->step;
3299 #if 0
3300 printf("DEBUG: start == %lu, end == %lu, %lu steps\n"
3301 ,src->start
3302 ,src->end
3303 ,steps
3304 );
3305 #endif
3307 switch (dst->vf.op) {
3308 case VDEF_PERCENT: {
3309 rrd_value_t * array;
3310 int field;
3313 if ((array = malloc(steps*sizeof(double)))==NULL) {
3314 rrd_set_error("malloc VDEV_PERCENT");
3315 return -1;
3316 }
3317 for (step=0;step < steps; step++) {
3318 array[step]=data[step*src->ds_cnt];
3319 }
3320 qsort(array,step,sizeof(double),vdef_percent_compar);
3322 field = (steps-1)*dst->vf.param/100;
3323 dst->vf.val = array[field];
3324 dst->vf.when = 0; /* no time component */
3325 free(array);
3326 #if 0
3327 for(step=0;step<steps;step++)
3328 printf("DEBUG: %3li:%10.2f %c\n",step,array[step],step==field?'*':' ');
3329 #endif
3330 }
3331 break;
3332 case VDEF_MAXIMUM:
3333 step=0;
3334 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3335 if (step == steps) {
3336 dst->vf.val = DNAN;
3337 dst->vf.when = 0;
3338 } else {
3339 dst->vf.val = data[step*src->ds_cnt];
3340 dst->vf.when = src->start + (step+1)*src->step;
3341 }
3342 while (step != steps) {
3343 if (finite(data[step*src->ds_cnt])) {
3344 if (data[step*src->ds_cnt] > dst->vf.val) {
3345 dst->vf.val = data[step*src->ds_cnt];
3346 dst->vf.when = src->start + (step+1)*src->step;
3347 }
3348 }
3349 step++;
3350 }
3351 break;
3352 case VDEF_TOTAL:
3353 case VDEF_AVERAGE: {
3354 int cnt=0;
3355 double sum=0.0;
3356 for (step=0;step<steps;step++) {
3357 if (finite(data[step*src->ds_cnt])) {
3358 sum += data[step*src->ds_cnt];
3359 cnt ++;
3360 };
3361 }
3362 if (cnt) {
3363 if (dst->vf.op == VDEF_TOTAL) {
3364 dst->vf.val = sum*src->step;
3365 dst->vf.when = cnt*src->step; /* not really "when" */
3366 } else {
3367 dst->vf.val = sum/cnt;
3368 dst->vf.when = 0; /* no time component */
3369 };
3370 } else {
3371 dst->vf.val = DNAN;
3372 dst->vf.when = 0;
3373 }
3374 }
3375 break;
3376 case VDEF_MINIMUM:
3377 step=0;
3378 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3379 if (step == steps) {
3380 dst->vf.val = DNAN;
3381 dst->vf.when = 0;
3382 } else {
3383 dst->vf.val = data[step*src->ds_cnt];
3384 dst->vf.when = src->start + (step+1)*src->step;
3385 }
3386 while (step != steps) {
3387 if (finite(data[step*src->ds_cnt])) {
3388 if (data[step*src->ds_cnt] < dst->vf.val) {
3389 dst->vf.val = data[step*src->ds_cnt];
3390 dst->vf.when = src->start + (step+1)*src->step;
3391 }
3392 }
3393 step++;
3394 }
3395 break;
3396 case VDEF_FIRST:
3397 /* The time value returned here is one step before the
3398 * actual time value. This is the start of the first
3399 * non-NaN interval.
3400 */
3401 step=0;
3402 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3403 if (step == steps) { /* all entries were NaN */
3404 dst->vf.val = DNAN;
3405 dst->vf.when = 0;
3406 } else {
3407 dst->vf.val = data[step*src->ds_cnt];
3408 dst->vf.when = src->start + step*src->step;
3409 }
3410 break;
3411 case VDEF_LAST:
3412 /* The time value returned here is the
3413 * actual time value. This is the end of the last
3414 * non-NaN interval.
3415 */
3416 step=steps-1;
3417 while (step >= 0 && isnan(data[step*src->ds_cnt])) step--;
3418 if (step < 0) { /* all entries were NaN */
3419 dst->vf.val = DNAN;
3420 dst->vf.when = 0;
3421 } else {
3422 dst->vf.val = data[step*src->ds_cnt];
3423 dst->vf.when = src->start + (step+1)*src->step;
3424 }
3425 break;
3426 }
3427 return 0;
3428 }
3430 /* NaN < -INF < finite_values < INF */
3431 int
3432 vdef_percent_compar(a,b)
3433 const void *a,*b;
3434 {
3435 /* Equality is not returned; this doesn't hurt except
3436 * (maybe) for a little performance.
3437 */
3439 /* First catch NaN values. They are smallest */
3440 if (isnan( *(double *)a )) return -1;
3441 if (isnan( *(double *)b )) return 1;
3443 /* NaN doesn't reach this part so INF and -INF are extremes.
3444 * The sign from isinf() is compatible with the sign we return
3445 */
3446 if (isinf( *(double *)a )) return isinf( *(double *)a );
3447 if (isinf( *(double *)b )) return isinf( *(double *)b );
3449 /* If we reach this, both values must be finite */
3450 if ( *(double *)a < *(double *)b ) return -1; else return 1;
3451 }