22f3f542ecd0a6f7a8239775618257b7e0ded974
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,
1809 im->xlab_user.labtm,
1810 im->xlab_user.labst);
1811 ti <= im->end;
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 (ti < im->start || ti > 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 node = gfx_new_area(im->canvas,
1966 X0,Y0-boxV,
1967 X0,Y0,
1968 X0+boxH,Y0,
1969 im->gdes[i].col);
1970 gfx_add_point ( node, X0+boxH, Y0-boxV );
1971 node = gfx_new_line(im->canvas,
1972 X0,Y0-boxV, X0,Y0,
1973 1,0x000000FF);
1974 gfx_add_point(node,X0+boxH,Y0);
1975 gfx_add_point(node,X0+boxH,Y0-boxV);
1976 gfx_close_path(node);
1977 }
1978 }
1979 }
1980 }
1983 /*****************************************************
1984 * lazy check make sure we rely need to create this graph
1985 *****************************************************/
1987 int lazy_check(image_desc_t *im){
1988 FILE *fd = NULL;
1989 int size = 1;
1990 struct stat imgstat;
1992 if (im->lazy == 0) return 0; /* no lazy option */
1993 if (stat(im->graphfile,&imgstat) != 0)
1994 return 0; /* can't stat */
1995 /* one pixel in the existing graph is more then what we would
1996 change here ... */
1997 if (time(NULL) - imgstat.st_mtime >
1998 (im->end - im->start) / im->xsize)
1999 return 0;
2000 if ((fd = fopen(im->graphfile,"rb")) == NULL)
2001 return 0; /* the file does not exist */
2002 switch (im->canvas->imgformat) {
2003 case IF_PNG:
2004 size = PngSize(fd,&(im->ximg),&(im->yimg));
2005 break;
2006 default:
2007 size = 1;
2008 }
2009 fclose(fd);
2010 return size;
2011 }
2013 #ifdef WITH_PIECHART
2014 void
2015 pie_part(image_desc_t *im, gfx_color_t color,
2016 double PieCenterX, double PieCenterY, double Radius,
2017 double startangle, double endangle)
2018 {
2019 gfx_node_t *node;
2020 double angle;
2021 double step=M_PI/50; /* Number of iterations for the circle;
2022 ** 10 is definitely too low, more than
2023 ** 50 seems to be overkill
2024 */
2026 /* Strange but true: we have to work clockwise or else
2027 ** anti aliasing nor transparency don't work.
2028 **
2029 ** This test is here to make sure we do it right, also
2030 ** this makes the for...next loop more easy to implement.
2031 ** The return will occur if the user enters a negative number
2032 ** (which shouldn't be done according to the specs) or if the
2033 ** programmers do something wrong (which, as we all know, never
2034 ** happens anyway :)
2035 */
2036 if (endangle<startangle) return;
2038 /* Hidden feature: Radius decreases each full circle */
2039 angle=startangle;
2040 while (angle>=2*M_PI) {
2041 angle -= 2*M_PI;
2042 Radius *= 0.8;
2043 }
2045 node=gfx_new_area(im->canvas,
2046 PieCenterX+sin(startangle)*Radius,
2047 PieCenterY-cos(startangle)*Radius,
2048 PieCenterX,
2049 PieCenterY,
2050 PieCenterX+sin(endangle)*Radius,
2051 PieCenterY-cos(endangle)*Radius,
2052 color);
2053 for (angle=endangle;angle-startangle>=step;angle-=step) {
2054 gfx_add_point(node,
2055 PieCenterX+sin(angle)*Radius,
2056 PieCenterY-cos(angle)*Radius );
2057 }
2058 }
2060 #endif
2062 int
2063 graph_size_location(image_desc_t *im, int elements
2065 #ifdef WITH_PIECHART
2066 , int piechart
2067 #endif
2069 )
2070 {
2071 /* The actual size of the image to draw is determined from
2072 ** several sources. The size given on the command line is
2073 ** the graph area but we need more as we have to draw labels
2074 ** and other things outside the graph area
2075 */
2077 /* +-+-------------------------------------------+
2078 ** |l|.................title.....................|
2079 ** |e+--+-------------------------------+--------+
2080 ** |b| b| | |
2081 ** |a| a| | pie |
2082 ** |l| l| main graph area | chart |
2083 ** |.| .| | area |
2084 ** |t| y| | |
2085 ** |r+--+-------------------------------+--------+
2086 ** |e| | x-axis labels | |
2087 ** |v+--+-------------------------------+--------+
2088 ** | |..............legends......................|
2089 ** +-+-------------------------------------------+
2090 */
2091 int Xvertical=0, Yvertical=0,
2092 Xtitle =0, Ytitle =0,
2093 Xylabel =0, Yylabel =0,
2094 Xmain =0, Ymain =0,
2095 Xpie =0, Ypie =0,
2096 Xxlabel =0, Yxlabel =0,
2097 #if 0
2098 Xlegend =0, Ylegend =0,
2099 #endif
2100 Xspacing =10, Yspacing =10;
2102 if (im->extra_flags & ONLY_GRAPH) {
2103 Xspacing =0;
2104 Yspacing =0;
2105 } else {
2106 if (im->ylegend[0] != '\0') {
2107 Xvertical = im->text_prop[TEXT_PROP_UNIT].size *2;
2108 Yvertical = gfx_get_text_width(im->canvas, 0,
2109 im->text_prop[TEXT_PROP_UNIT].font,
2110 im->text_prop[TEXT_PROP_UNIT].size,
2111 im->tabwidth,im->ylegend, 0);
2112 }
2113 }
2115 if (im->title[0] != '\0') {
2116 /* The title is placed "inbetween" two text lines so it
2117 ** automatically has some vertical spacing. The horizontal
2118 ** spacing is added here, on each side.
2119 */
2120 Xtitle = gfx_get_text_width(im->canvas, 0,
2121 im->text_prop[TEXT_PROP_TITLE].font,
2122 im->text_prop[TEXT_PROP_TITLE].size,
2123 im->tabwidth,
2124 im->title, 0) + 2*Xspacing;
2125 Ytitle = im->text_prop[TEXT_PROP_TITLE].size*2.5;
2126 }
2128 if (elements) {
2129 Xmain=im->xsize;
2130 Ymain=im->ysize;
2131 if (im->draw_x_grid) {
2132 Xxlabel=Xmain;
2133 Yxlabel=im->text_prop[TEXT_PROP_AXIS].size *2.5;
2134 }
2135 if (im->draw_y_grid) {
2136 Xylabel=im->text_prop[TEXT_PROP_AXIS].size *6;
2137 Yylabel=Ymain;
2138 }
2139 }
2141 #ifdef WITH_PIECHART
2142 if (piechart) {
2143 im->piesize=im->xsize<im->ysize?im->xsize:im->ysize;
2144 Xpie=im->piesize;
2145 Ypie=im->piesize;
2146 }
2147 #endif
2149 /* Now calculate the total size. Insert some spacing where
2150 desired. im->xorigin and im->yorigin need to correspond
2151 with the lower left corner of the main graph area or, if
2152 this one is not set, the imaginary box surrounding the
2153 pie chart area. */
2155 /* The legend width cannot yet be determined, as a result we
2156 ** have problems adjusting the image to it. For now, we just
2157 ** forget about it at all; the legend will have to fit in the
2158 ** size already allocated.
2159 */
2160 im->ximg = Xmain;
2162 if ( !(im->extra_flags & ONLY_GRAPH) ) {
2163 im->ximg = Xylabel + Xmain + Xpie + 2 * Xspacing;
2164 }
2166 if (Xmain) im->ximg += Xspacing;
2167 if (Xpie) im->ximg += Xspacing;
2169 if (im->extra_flags & ONLY_GRAPH) {
2170 im->xorigin = 0;
2171 } else {
2172 im->xorigin = Xspacing + Xylabel;
2173 }
2175 if (Xtitle > im->ximg) im->ximg = Xtitle;
2176 if (Xvertical) {
2177 im->ximg += Xvertical;
2178 im->xorigin += Xvertical;
2179 }
2180 xtr(im,0);
2182 /* The vertical size is interesting... we need to compare
2183 ** the sum of {Ytitle, Ymain, Yxlabel, Ylegend} with Yvertical
2184 ** however we need to know {Ytitle+Ymain+Yxlabel} in order to
2185 ** start even thinking about Ylegend.
2186 **
2187 ** Do it in three portions: First calculate the inner part,
2188 ** then do the legend, then adjust the total height of the img.
2189 */
2191 /* reserve space for main and/or pie */
2193 if (im->extra_flags & ONLY_GRAPH) {
2194 im->yimg = Ymain;
2195 } else {
2196 im->yimg = Ymain + Yxlabel;
2197 }
2199 if (im->yimg < Ypie) im->yimg = Ypie;
2201 if (im->extra_flags & ONLY_GRAPH) {
2202 im->yorigin = im->yimg;
2203 } else {
2204 im->yorigin = im->yimg - Yxlabel;
2205 }
2207 /* reserve space for the title *or* some padding above the graph */
2208 if (Ytitle) {
2209 im->yimg += Ytitle;
2210 im->yorigin += Ytitle;
2211 } else {
2212 im->yimg += Yspacing;
2213 im->yorigin += Yspacing;
2214 }
2215 /* reserve space for padding below the graph */
2216 im->yimg += Yspacing;
2217 ytr(im,DNAN);
2219 /* Determine where to place the legends onto the image.
2220 ** Adjust im->yimg to match the space requirements.
2221 */
2222 if(leg_place(im)==-1)
2223 return -1;
2225 /* last of three steps: check total height of image */
2226 if (im->yimg < Yvertical) im->yimg = Yvertical;
2228 #if 0
2229 if (Xlegend > im->ximg) {
2230 im->ximg = Xlegend;
2231 /* reposition Pie */
2232 }
2233 #endif
2235 #ifdef WITH_PIECHART
2236 /* The pie is placed in the upper right hand corner,
2237 ** just below the title (if any) and with sufficient
2238 ** padding.
2239 */
2240 if (elements) {
2241 im->pie_x = im->ximg - Xspacing - Xpie/2;
2242 im->pie_y = im->yorigin-Ymain+Ypie/2;
2243 } else {
2244 im->pie_x = im->ximg/2;
2245 im->pie_y = im->yorigin-Ypie/2;
2246 }
2247 #endif
2249 return 0;
2250 }
2252 /* draw that picture thing ... */
2253 int
2254 graph_paint(image_desc_t *im, char ***calcpr)
2255 {
2256 int i,ii;
2257 int lazy = lazy_check(im);
2258 #ifdef WITH_PIECHART
2259 int piechart = 0;
2260 double PieStart=0.0;
2261 #endif
2262 FILE *fo;
2263 gfx_node_t *node;
2265 double areazero = 0.0;
2266 enum gf_en stack_gf = GF_PRINT;
2267 graph_desc_t *lastgdes = NULL;
2269 /* if we are lazy and there is nothing to PRINT ... quit now */
2270 if (lazy && im->prt_c==0) return 0;
2272 /* pull the data from the rrd files ... */
2274 if(data_fetch(im)==-1)
2275 return -1;
2277 /* evaluate VDEF and CDEF operations ... */
2278 if(data_calc(im)==-1)
2279 return -1;
2281 #ifdef WITH_PIECHART
2282 /* check if we need to draw a piechart */
2283 for(i=0;i<im->gdes_c;i++){
2284 if (im->gdes[i].gf == GF_PART) {
2285 piechart=1;
2286 break;
2287 }
2288 }
2289 #endif
2291 /* calculate and PRINT and GPRINT definitions. We have to do it at
2292 * this point because it will affect the length of the legends
2293 * if there are no graph elements we stop here ...
2294 * if we are lazy, try to quit ...
2295 */
2296 i=print_calc(im,calcpr);
2297 if(i<0) return -1;
2298 if(((i==0)
2299 #ifdef WITH_PIECHART
2300 &&(piechart==0)
2301 #endif
2302 ) || lazy) return 0;
2304 #ifdef WITH_PIECHART
2305 /* If there's only the pie chart to draw, signal this */
2306 if (i==0) piechart=2;
2307 #endif
2309 /* get actual drawing data and find min and max values*/
2310 if(data_proc(im)==-1)
2311 return -1;
2313 if(!im->logarithmic){si_unit(im);} /* identify si magnitude Kilo, Mega Giga ? */
2315 if(!im->rigid && ! im->logarithmic)
2316 expand_range(im); /* make sure the upper and lower limit are
2317 sensible values */
2319 if (!calc_horizontal_grid(im))
2320 return -1;
2322 if (im->gridfit)
2323 apply_gridfit(im);
2326 /**************************************************************
2327 *** Calculating sizes and locations became a bit confusing ***
2328 *** so I moved this into a separate function. ***
2329 **************************************************************/
2330 if(graph_size_location(im,i
2331 #ifdef WITH_PIECHART
2332 ,piechart
2333 #endif
2334 )==-1)
2335 return -1;
2337 /* the actual graph is created by going through the individual
2338 graph elements and then drawing them */
2340 node=gfx_new_area ( im->canvas,
2341 0, 0,
2342 im->ximg, 0,
2343 im->ximg, im->yimg,
2344 im->graph_col[GRC_BACK]);
2346 gfx_add_point(node,0, im->yimg);
2348 #ifdef WITH_PIECHART
2349 if (piechart != 2) {
2350 #endif
2351 node=gfx_new_area ( im->canvas,
2352 im->xorigin, im->yorigin,
2353 im->xorigin + im->xsize, im->yorigin,
2354 im->xorigin + im->xsize, im->yorigin-im->ysize,
2355 im->graph_col[GRC_CANVAS]);
2357 gfx_add_point(node,im->xorigin, im->yorigin - im->ysize);
2359 if (im->minval > 0.0)
2360 areazero = im->minval;
2361 if (im->maxval < 0.0)
2362 areazero = im->maxval;
2363 #ifdef WITH_PIECHART
2364 }
2365 #endif
2367 #ifdef WITH_PIECHART
2368 if (piechart) {
2369 pie_part(im,im->graph_col[GRC_CANVAS],im->pie_x,im->pie_y,im->piesize*0.5,0,2*M_PI);
2370 }
2371 #endif
2373 for(i=0;i<im->gdes_c;i++){
2374 switch(im->gdes[i].gf){
2375 case GF_CDEF:
2376 case GF_VDEF:
2377 case GF_DEF:
2378 case GF_PRINT:
2379 case GF_GPRINT:
2380 case GF_COMMENT:
2381 case GF_HRULE:
2382 case GF_VRULE:
2383 case GF_XPORT:
2384 case GF_SHIFT:
2385 break;
2386 case GF_TICK:
2387 for (ii = 0; ii < im->xsize; ii++)
2388 {
2389 if (!isnan(im->gdes[i].p_data[ii]) &&
2390 im->gdes[i].p_data[ii] > 0.0)
2391 {
2392 /* generate a tick */
2393 gfx_new_line(im->canvas, im -> xorigin + ii,
2394 im -> yorigin - (im -> gdes[i].yrule * im -> ysize),
2395 im -> xorigin + ii,
2396 im -> yorigin,
2397 1.0,
2398 im -> gdes[i].col );
2399 }
2400 }
2401 break;
2402 case GF_LINE:
2403 case GF_AREA:
2404 stack_gf = im->gdes[i].gf;
2405 case GF_STACK:
2406 /* fix data points at oo and -oo */
2407 for(ii=0;ii<im->xsize;ii++){
2408 if (isinf(im->gdes[i].p_data[ii])){
2409 if (im->gdes[i].p_data[ii] > 0) {
2410 im->gdes[i].p_data[ii] = im->maxval ;
2411 } else {
2412 im->gdes[i].p_data[ii] = im->minval ;
2413 }
2415 }
2416 } /* for */
2418 if (im->gdes[i].col != 0x0){
2419 /* GF_LINE and friend */
2420 if(stack_gf == GF_LINE ){
2421 node = NULL;
2422 for(ii=1;ii<im->xsize;ii++){
2423 if ( ! isnan(im->gdes[i].p_data[ii-1])
2424 && ! isnan(im->gdes[i].p_data[ii])){
2425 if (node == NULL){
2426 node = gfx_new_line(im->canvas,
2427 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii-1]),
2428 ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]),
2429 im->gdes[i].linewidth,
2430 im->gdes[i].col);
2431 } else {
2432 gfx_add_point(node,ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]));
2433 }
2434 } else {
2435 node = NULL;
2436 }
2437 }
2438 } else {
2439 int area_start=-1;
2440 node = NULL;
2441 for(ii=1;ii<im->xsize;ii++){
2442 /* open an area */
2443 if ( ! isnan(im->gdes[i].p_data[ii-1])
2444 && ! isnan(im->gdes[i].p_data[ii])){
2445 if (node == NULL){
2446 float ybase = 0.0;
2447 /*
2448 if (im->gdes[i].gf == GF_STACK) {
2449 */
2450 if ( (im->gdes[i].gf == GF_STACK)
2451 || (im->gdes[i].stack) ) {
2453 ybase = ytr(im,lastgdes->p_data[ii-1]);
2454 } else {
2455 ybase = ytr(im,areazero);
2456 }
2457 area_start = ii-1;
2458 node = gfx_new_area(im->canvas,
2459 ii-1+im->xorigin,ybase,
2460 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii-1]),
2461 ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]),
2462 im->gdes[i].col
2463 );
2464 } else {
2465 gfx_add_point(node,ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]));
2466 }
2467 }
2469 if ( node != NULL && (ii+1==im->xsize || isnan(im->gdes[i].p_data[ii]) )){
2470 /* GF_AREA STACK type*/
2471 /*
2472 if (im->gdes[i].gf == GF_STACK ) {
2473 */
2474 if ( (im->gdes[i].gf == GF_STACK)
2475 || (im->gdes[i].stack) ) {
2476 int iii;
2477 for (iii=ii-1;iii>area_start;iii--){
2478 gfx_add_point(node,iii+im->xorigin,ytr(im,lastgdes->p_data[iii]));
2479 }
2480 } else {
2481 gfx_add_point(node,ii+im->xorigin,ytr(im,areazero));
2482 };
2483 node=NULL;
2484 };
2485 }
2486 } /* else GF_LINE */
2487 } /* if color != 0x0 */
2488 /* make sure we do not run into trouble when stacking on NaN */
2489 for(ii=0;ii<im->xsize;ii++){
2490 if (isnan(im->gdes[i].p_data[ii])) {
2491 if (lastgdes && (im->gdes[i].gf == GF_STACK)) {
2492 im->gdes[i].p_data[ii] = lastgdes->p_data[ii];
2493 } else {
2494 im->gdes[i].p_data[ii] = ytr(im,areazero);
2495 }
2496 }
2497 }
2498 lastgdes = &(im->gdes[i]);
2499 break;
2500 #ifdef WITH_PIECHART
2501 case GF_PART:
2502 if(isnan(im->gdes[i].yrule)) /* fetch variable */
2503 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2505 if (finite(im->gdes[i].yrule)) { /* even the fetched var can be NaN */
2506 pie_part(im,im->gdes[i].col,
2507 im->pie_x,im->pie_y,im->piesize*0.4,
2508 M_PI*2.0*PieStart/100.0,
2509 M_PI*2.0*(PieStart+im->gdes[i].yrule)/100.0);
2510 PieStart += im->gdes[i].yrule;
2511 }
2512 break;
2513 #endif
2515 } /* switch */
2516 }
2517 #ifdef WITH_PIECHART
2518 if (piechart==2) {
2519 im->draw_x_grid=0;
2520 im->draw_y_grid=0;
2521 }
2522 #endif
2524 if( !(im->extra_flags & ONLY_GRAPH) )
2525 axis_paint(im);
2527 /* grid_paint also does the text */
2528 if( !(im->extra_flags & ONLY_GRAPH) )
2529 grid_paint(im);
2531 /* the RULES are the last thing to paint ... */
2532 for(i=0;i<im->gdes_c;i++){
2534 switch(im->gdes[i].gf){
2535 case GF_HRULE:
2536 if(isnan(im->gdes[i].yrule)) { /* fetch variable */
2537 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2538 };
2539 if(im->gdes[i].yrule >= im->minval
2540 && im->gdes[i].yrule <= im->maxval)
2541 gfx_new_line(im->canvas,
2542 im->xorigin,ytr(im,im->gdes[i].yrule),
2543 im->xorigin+im->xsize,ytr(im,im->gdes[i].yrule),
2544 1.0,im->gdes[i].col);
2545 break;
2546 case GF_VRULE:
2547 if(im->gdes[i].xrule == 0) { /* fetch variable */
2548 im->gdes[i].xrule = im->gdes[im->gdes[i].vidx].vf.when;
2549 };
2550 if(im->gdes[i].xrule >= im->start
2551 && im->gdes[i].xrule <= im->end)
2552 gfx_new_line(im->canvas,
2553 xtr(im,im->gdes[i].xrule),im->yorigin,
2554 xtr(im,im->gdes[i].xrule),im->yorigin-im->ysize,
2555 1.0,im->gdes[i].col);
2556 break;
2557 default:
2558 break;
2559 }
2560 }
2563 if (strcmp(im->graphfile,"-")==0) {
2564 fo = im->graphhandle ? im->graphhandle : stdout;
2565 #ifdef WIN32
2566 /* Change translation mode for stdout to BINARY */
2567 _setmode( _fileno( fo ), O_BINARY );
2568 #endif
2569 } else {
2570 if ((fo = fopen(im->graphfile,"wb")) == NULL) {
2571 rrd_set_error("Opening '%s' for write: %s",im->graphfile,
2572 rrd_strerror(errno));
2573 return (-1);
2574 }
2575 }
2576 gfx_render (im->canvas,im->ximg,im->yimg,0x0,fo);
2577 if (strcmp(im->graphfile,"-") != 0)
2578 fclose(fo);
2579 return 0;
2580 }
2583 /*****************************************************
2584 * graph stuff
2585 *****************************************************/
2587 int
2588 gdes_alloc(image_desc_t *im){
2590 im->gdes_c++;
2591 if ((im->gdes = (graph_desc_t *) rrd_realloc(im->gdes, (im->gdes_c)
2592 * sizeof(graph_desc_t)))==NULL){
2593 rrd_set_error("realloc graph_descs");
2594 return -1;
2595 }
2598 im->gdes[im->gdes_c-1].step=im->step;
2599 im->gdes[im->gdes_c-1].stack=0;
2600 im->gdes[im->gdes_c-1].debug=0;
2601 im->gdes[im->gdes_c-1].start=im->start;
2602 im->gdes[im->gdes_c-1].end=im->end;
2603 im->gdes[im->gdes_c-1].vname[0]='\0';
2604 im->gdes[im->gdes_c-1].data=NULL;
2605 im->gdes[im->gdes_c-1].ds_namv=NULL;
2606 im->gdes[im->gdes_c-1].data_first=0;
2607 im->gdes[im->gdes_c-1].p_data=NULL;
2608 im->gdes[im->gdes_c-1].rpnp=NULL;
2609 im->gdes[im->gdes_c-1].shift=0;
2610 im->gdes[im->gdes_c-1].col = 0x0;
2611 im->gdes[im->gdes_c-1].legend[0]='\0';
2612 im->gdes[im->gdes_c-1].format[0]='\0';
2613 im->gdes[im->gdes_c-1].rrd[0]='\0';
2614 im->gdes[im->gdes_c-1].ds=-1;
2615 im->gdes[im->gdes_c-1].p_data=NULL;
2616 im->gdes[im->gdes_c-1].yrule=DNAN;
2617 im->gdes[im->gdes_c-1].xrule=0;
2618 return 0;
2619 }
2621 /* copies input untill the first unescaped colon is found
2622 or until input ends. backslashes have to be escaped as well */
2623 int
2624 scan_for_col(char *input, int len, char *output)
2625 {
2626 int inp,outp=0;
2627 for (inp=0;
2628 inp < len &&
2629 input[inp] != ':' &&
2630 input[inp] != '\0';
2631 inp++){
2632 if (input[inp] == '\\' &&
2633 input[inp+1] != '\0' &&
2634 (input[inp+1] == '\\' ||
2635 input[inp+1] == ':')){
2636 output[outp++] = input[++inp];
2637 }
2638 else {
2639 output[outp++] = input[inp];
2640 }
2641 }
2642 output[outp] = '\0';
2643 return inp;
2644 }
2645 /* Some surgery done on this function, it became ridiculously big.
2646 ** Things moved:
2647 ** - initializing now in rrd_graph_init()
2648 ** - options parsing now in rrd_graph_options()
2649 ** - script parsing now in rrd_graph_script()
2650 */
2651 int
2652 rrd_graph(int argc, char **argv, char ***prdata, int *xsize, int *ysize, FILE *stream, double *ymin, double *ymax)
2653 {
2654 image_desc_t im;
2656 rrd_graph_init(&im);
2657 im.graphhandle = stream;
2659 rrd_graph_options(argc,argv,&im);
2660 if (rrd_test_error()) {
2661 im_free(&im);
2662 return -1;
2663 }
2665 if (strlen(argv[optind])>=MAXPATH) {
2666 rrd_set_error("filename (including path) too long");
2667 im_free(&im);
2668 return -1;
2669 }
2670 strncpy(im.graphfile,argv[optind],MAXPATH-1);
2671 im.graphfile[MAXPATH-1]='\0';
2673 rrd_graph_script(argc,argv,&im,1);
2674 if (rrd_test_error()) {
2675 im_free(&im);
2676 return -1;
2677 }
2679 /* Everything is now read and the actual work can start */
2681 (*prdata)=NULL;
2682 if (graph_paint(&im,prdata)==-1){
2683 im_free(&im);
2684 return -1;
2685 }
2687 /* The image is generated and needs to be output.
2688 ** Also, if needed, print a line with information about the image.
2689 */
2691 *xsize=im.ximg;
2692 *ysize=im.yimg;
2693 *ymin=im.minval;
2694 *ymax=im.maxval;
2695 if (im.imginfo) {
2696 char *filename;
2697 if (!(*prdata)) {
2698 /* maybe prdata is not allocated yet ... lets do it now */
2699 if ((*prdata = calloc(2,sizeof(char *)))==NULL) {
2700 rrd_set_error("malloc imginfo");
2701 return -1;
2702 };
2703 }
2704 if(((*prdata)[0] = malloc((strlen(im.imginfo)+200+strlen(im.graphfile))*sizeof(char)))
2705 ==NULL){
2706 rrd_set_error("malloc imginfo");
2707 return -1;
2708 }
2709 filename=im.graphfile+strlen(im.graphfile);
2710 while(filename > im.graphfile) {
2711 if (*(filename-1)=='/' || *(filename-1)=='\\' ) break;
2712 filename--;
2713 }
2715 sprintf((*prdata)[0],im.imginfo,filename,(long)(im.canvas->zoom*im.ximg),(long)(im.canvas->zoom*im.yimg));
2716 }
2717 im_free(&im);
2718 return 0;
2719 }
2721 void
2722 rrd_graph_init(image_desc_t *im)
2723 {
2724 unsigned int i;
2726 #ifdef HAVE_TZSET
2727 tzset();
2728 #endif
2729 #ifdef HAVE_SETLOCALE
2730 setlocale(LC_TIME,"");
2731 #endif
2733 im->xlab_user.minsec = -1;
2734 im->ximg=0;
2735 im->yimg=0;
2736 im->xsize = 400;
2737 im->ysize = 100;
2738 im->step = 0;
2739 im->ylegend[0] = '\0';
2740 im->title[0] = '\0';
2741 im->minval = DNAN;
2742 im->maxval = DNAN;
2743 im->unitsexponent= 9999;
2744 im->extra_flags= 0;
2745 im->rigid = 0;
2746 im->gridfit = 1;
2747 im->imginfo = NULL;
2748 im->lazy = 0;
2749 im->logarithmic = 0;
2750 im->ygridstep = DNAN;
2751 im->draw_x_grid = 1;
2752 im->draw_y_grid = 1;
2753 im->base = 1000;
2754 im->prt_c = 0;
2755 im->gdes_c = 0;
2756 im->gdes = NULL;
2757 im->canvas = gfx_new_canvas();
2758 im->grid_dash_on = 1;
2759 im->grid_dash_off = 1;
2760 im->tabwidth = 40.0;
2762 for(i=0;i<DIM(graph_col);i++)
2763 im->graph_col[i]=graph_col[i];
2764 #ifdef WIN32
2765 {
2766 char *windir;
2767 windir = getenv("windir");
2768 /* %windir% is something like D:\windows or C:\winnt */
2769 if (windir != NULL) {
2770 strcpy(rrd_win_default_font,windir);
2771 strcat(rrd_win_default_font,"\\fonts\\cour.ttf");
2772 for(i=0;i<DIM(text_prop);i++)
2773 strcpy(text_prop[i].font,rrd_win_default_font);
2774 }
2775 }
2776 #endif
2777 for(i=0;i<DIM(text_prop);i++){
2778 im->text_prop[i].size = text_prop[i].size;
2779 strcpy(im->text_prop[i].font,text_prop[i].font);
2780 }
2781 }
2783 void
2784 rrd_graph_options(int argc, char *argv[],image_desc_t *im)
2785 {
2786 int stroff;
2787 char *parsetime_error = NULL;
2788 char scan_gtm[12],scan_mtm[12],scan_ltm[12],col_nam[12];
2789 time_t start_tmp=0,end_tmp=0;
2790 long long_tmp;
2791 struct rrd_time_value start_tv, end_tv;
2792 gfx_color_t color;
2794 parsetime("end-24h", &start_tv);
2795 parsetime("now", &end_tv);
2797 while (1){
2798 static struct option long_options[] =
2799 {
2800 {"start", required_argument, 0, 's'},
2801 {"end", required_argument, 0, 'e'},
2802 {"x-grid", required_argument, 0, 'x'},
2803 {"y-grid", required_argument, 0, 'y'},
2804 {"vertical-label",required_argument,0,'v'},
2805 {"width", required_argument, 0, 'w'},
2806 {"height", required_argument, 0, 'h'},
2807 {"interlaced", no_argument, 0, 'i'},
2808 {"upper-limit",required_argument, 0, 'u'},
2809 {"lower-limit",required_argument, 0, 'l'},
2810 {"rigid", no_argument, 0, 'r'},
2811 {"base", required_argument, 0, 'b'},
2812 {"logarithmic",no_argument, 0, 'o'},
2813 {"color", required_argument, 0, 'c'},
2814 {"font", required_argument, 0, 'n'},
2815 {"title", required_argument, 0, 't'},
2816 {"imginfo", required_argument, 0, 'f'},
2817 {"imgformat", required_argument, 0, 'a'},
2818 {"lazy", no_argument, 0, 'z'},
2819 {"zoom", required_argument, 0, 'm'},
2820 {"no-legend", no_argument, 0, 'g'},
2821 {"force-rules-legend",no_argument,0, 'F'},
2822 {"only-graph", no_argument, 0, 'j'},
2823 {"alt-y-grid", no_argument, 0, 'Y'},
2824 {"no-minor", no_argument, 0, 'I'},
2825 {"alt-autoscale", no_argument, 0, 'A'},
2826 {"alt-autoscale-max", no_argument, 0, 'M'},
2827 {"units-exponent",required_argument, 0, 'X'},
2828 {"step", required_argument, 0, 'S'},
2829 {"tabwidth", required_argument, 0, 'T'},
2830 {"no-gridfit", no_argument, 0, 'N'},
2831 {0,0,0,0}};
2832 int option_index = 0;
2833 int opt;
2836 opt = getopt_long(argc, argv,
2837 "s:e:x:y:v:w:h:iu:l:rb:oc:n:m:t:f:a:I:zgjFYAMX:S:NT:",
2838 long_options, &option_index);
2840 if (opt == EOF)
2841 break;
2843 switch(opt) {
2844 case 'I':
2845 im->extra_flags |= NOMINOR;
2846 break;
2847 case 'Y':
2848 im->extra_flags |= ALTYGRID;
2849 break;
2850 case 'A':
2851 im->extra_flags |= ALTAUTOSCALE;
2852 break;
2853 case 'M':
2854 im->extra_flags |= ALTAUTOSCALE_MAX;
2855 break;
2856 case 'j':
2857 im->extra_flags |= ONLY_GRAPH;
2858 break;
2859 case 'g':
2860 im->extra_flags |= NOLEGEND;
2861 break;
2862 case 'F':
2863 im->extra_flags |= FORCE_RULES_LEGEND;
2864 break;
2865 case 'X':
2866 im->unitsexponent = atoi(optarg);
2867 break;
2868 case 'T':
2869 im->tabwidth = atof(optarg);
2870 break;
2871 case 'S':
2872 im->step = atoi(optarg);
2873 break;
2874 case 262:
2875 im->gridfit = 0;
2876 break;
2877 case 's':
2878 if ((parsetime_error = parsetime(optarg, &start_tv))) {
2879 rrd_set_error( "start time: %s", parsetime_error );
2880 return;
2881 }
2882 break;
2883 case 'e':
2884 if ((parsetime_error = parsetime(optarg, &end_tv))) {
2885 rrd_set_error( "end time: %s", parsetime_error );
2886 return;
2887 }
2888 break;
2889 case 'x':
2890 if(strcmp(optarg,"none") == 0){
2891 im->draw_x_grid=0;
2892 break;
2893 };
2895 if(sscanf(optarg,
2896 "%10[A-Z]:%ld:%10[A-Z]:%ld:%10[A-Z]:%ld:%ld:%n",
2897 scan_gtm,
2898 &im->xlab_user.gridst,
2899 scan_mtm,
2900 &im->xlab_user.mgridst,
2901 scan_ltm,
2902 &im->xlab_user.labst,
2903 &im->xlab_user.precis,
2904 &stroff) == 7 && stroff != 0){
2905 strncpy(im->xlab_form, optarg+stroff, sizeof(im->xlab_form) - 1);
2906 if((int)(im->xlab_user.gridtm = tmt_conv(scan_gtm)) == -1){
2907 rrd_set_error("unknown keyword %s",scan_gtm);
2908 return;
2909 } else if ((int)(im->xlab_user.mgridtm = tmt_conv(scan_mtm)) == -1){
2910 rrd_set_error("unknown keyword %s",scan_mtm);
2911 return;
2912 } else if ((int)(im->xlab_user.labtm = tmt_conv(scan_ltm)) == -1){
2913 rrd_set_error("unknown keyword %s",scan_ltm);
2914 return;
2915 }
2916 im->xlab_user.minsec = 1;
2917 im->xlab_user.stst = im->xlab_form;
2918 } else {
2919 rrd_set_error("invalid x-grid format");
2920 return;
2921 }
2922 break;
2923 case 'y':
2925 if(strcmp(optarg,"none") == 0){
2926 im->draw_y_grid=0;
2927 break;
2928 };
2930 if(sscanf(optarg,
2931 "%lf:%d",
2932 &im->ygridstep,
2933 &im->ylabfact) == 2) {
2934 if(im->ygridstep<=0){
2935 rrd_set_error("grid step must be > 0");
2936 return;
2937 } else if (im->ylabfact < 1){
2938 rrd_set_error("label factor must be > 0");
2939 return;
2940 }
2941 } else {
2942 rrd_set_error("invalid y-grid format");
2943 return;
2944 }
2945 break;
2946 case 'v':
2947 strncpy(im->ylegend,optarg,150);
2948 im->ylegend[150]='\0';
2949 break;
2950 case 'u':
2951 im->maxval = atof(optarg);
2952 break;
2953 case 'l':
2954 im->minval = atof(optarg);
2955 break;
2956 case 'b':
2957 im->base = atol(optarg);
2958 if(im->base != 1024 && im->base != 1000 ){
2959 rrd_set_error("the only sensible value for base apart from 1000 is 1024");
2960 return;
2961 }
2962 break;
2963 case 'w':
2964 long_tmp = atol(optarg);
2965 if (long_tmp < 10) {
2966 rrd_set_error("width below 10 pixels");
2967 return;
2968 }
2969 im->xsize = long_tmp;
2970 break;
2971 case 'h':
2972 long_tmp = atol(optarg);
2973 if (long_tmp < 10) {
2974 rrd_set_error("height below 10 pixels");
2975 return;
2976 }
2977 im->ysize = long_tmp;
2978 break;
2979 case 'i':
2980 im->canvas->interlaced = 1;
2981 break;
2982 case 'r':
2983 im->rigid = 1;
2984 break;
2985 case 'f':
2986 im->imginfo = optarg;
2987 break;
2988 case 'a':
2989 if((int)(im->canvas->imgformat = if_conv(optarg)) == -1) {
2990 rrd_set_error("unsupported graphics format '%s'",optarg);
2991 return;
2992 }
2993 break;
2994 case 'z':
2995 im->lazy = 1;
2996 break;
2997 case 'o':
2998 im->logarithmic = 1;
2999 if (isnan(im->minval))
3000 im->minval=1;
3001 break;
3002 case 'c':
3003 if(sscanf(optarg,
3004 "%10[A-Z]#%8lx",
3005 col_nam,&color) == 2){
3006 int ci;
3007 if((ci=grc_conv(col_nam)) != -1){
3008 im->graph_col[ci]=color;
3009 } else {
3010 rrd_set_error("invalid color name '%s'",col_nam);
3011 }
3012 } else {
3013 rrd_set_error("invalid color def format");
3014 return;
3015 }
3016 break;
3017 case 'n':{
3018 char prop[15];
3019 double size = 1;
3020 char font[1024];
3022 if(sscanf(optarg,
3023 "%10[A-Z]:%lf:%1000s",
3024 prop,&size,font) == 3){
3025 int sindex;
3026 if((sindex=text_prop_conv(prop)) != -1){
3027 im->text_prop[sindex].size=size;
3028 strcpy(im->text_prop[sindex].font,font);
3029 if (sindex==0) { /* the default */
3030 im->text_prop[TEXT_PROP_TITLE].size=size;
3031 strcpy(im->text_prop[TEXT_PROP_TITLE].font,font);
3032 im->text_prop[TEXT_PROP_AXIS].size=size;
3033 strcpy(im->text_prop[TEXT_PROP_AXIS].font,font);
3034 im->text_prop[TEXT_PROP_UNIT].size=size;
3035 strcpy(im->text_prop[TEXT_PROP_UNIT].font,font);
3036 im->text_prop[TEXT_PROP_LEGEND].size=size;
3037 strcpy(im->text_prop[TEXT_PROP_LEGEND].font,font);
3038 }
3039 } else {
3040 rrd_set_error("invalid fonttag '%s'",prop);
3041 return;
3042 }
3043 } else {
3044 rrd_set_error("invalid text property format");
3045 return;
3046 }
3047 break;
3048 }
3049 case 'm':
3050 im->canvas->zoom = atof(optarg);
3051 if (im->canvas->zoom <= 0.0) {
3052 rrd_set_error("zoom factor must be > 0");
3053 return;
3054 }
3055 break;
3056 case 't':
3057 strncpy(im->title,optarg,150);
3058 im->title[150]='\0';
3059 break;
3061 case '?':
3062 if (optopt != 0)
3063 rrd_set_error("unknown option '%c'", optopt);
3064 else
3065 rrd_set_error("unknown option '%s'",argv[optind-1]);
3066 return;
3067 }
3068 }
3070 if (optind >= argc) {
3071 rrd_set_error("missing filename");
3072 return;
3073 }
3075 if (im->logarithmic == 1 && (im->minval <= 0 || isnan(im->minval))){
3076 rrd_set_error("for a logarithmic yaxis you must specify a lower-limit > 0");
3077 return;
3078 }
3080 if (proc_start_end(&start_tv,&end_tv,&start_tmp,&end_tmp) == -1){
3081 /* error string is set in parsetime.c */
3082 return;
3083 }
3085 if (start_tmp < 3600*24*365*10){
3086 rrd_set_error("the first entry to fetch should be after 1980 (%ld)",start_tmp);
3087 return;
3088 }
3090 if (end_tmp < start_tmp) {
3091 rrd_set_error("start (%ld) should be less than end (%ld)",
3092 start_tmp, end_tmp);
3093 return;
3094 }
3096 im->start = start_tmp;
3097 im->end = end_tmp;
3098 im->step = max((long)im->step, (im->end-im->start)/im->xsize);
3099 }
3101 int
3102 rrd_graph_check_vname(image_desc_t *im, char *varname, char *err)
3103 {
3104 if ((im->gdes[im->gdes_c-1].vidx=find_var(im,varname))==-1) {
3105 rrd_set_error("Unknown variable '%s' in %s",varname,err);
3106 return -1;
3107 }
3108 return 0;
3109 }
3110 int
3111 rrd_graph_color(image_desc_t *im, char *var, char *err, int optional)
3112 {
3113 char *color;
3114 graph_desc_t *gdp=&im->gdes[im->gdes_c-1];
3116 color=strstr(var,"#");
3117 if (color==NULL) {
3118 if (optional==0) {
3119 rrd_set_error("Found no color in %s",err);
3120 return 0;
3121 }
3122 return 0;
3123 } else {
3124 int n=0;
3125 char *rest;
3126 gfx_color_t col;
3128 rest=strstr(color,":");
3129 if (rest!=NULL)
3130 n=rest-color;
3131 else
3132 n=strlen(color);
3134 switch (n) {
3135 case 7:
3136 sscanf(color,"#%6lx%n",&col,&n);
3137 col = (col << 8) + 0xff /* shift left by 8 */;
3138 if (n!=7) rrd_set_error("Color problem in %s",err);
3139 break;
3140 case 9:
3141 sscanf(color,"#%8lx%n",&col,&n);
3142 if (n==9) break;
3143 default:
3144 rrd_set_error("Color problem in %s",err);
3145 }
3146 if (rrd_test_error()) return 0;
3147 gdp->col = col;
3148 return n;
3149 }
3150 }
3153 int bad_format(char *fmt) {
3154 char *ptr;
3155 int n=0;
3156 ptr = fmt;
3157 while (*ptr != '\0')
3158 if (*ptr++ == '%') {
3160 /* line cannot end with percent char */
3161 if (*ptr == '\0') return 1;
3163 /* '%s', '%S' and '%%' are allowed */
3164 if (*ptr == 's' || *ptr == 'S' || *ptr == '%') ptr++;
3166 /* or else '% 6.2lf' and such are allowed */
3167 else {
3169 /* optional padding character */
3170 if (*ptr == ' ' || *ptr == '+' || *ptr == '-') ptr++;
3172 /* This should take care of 'm.n' with all three optional */
3173 while (*ptr >= '0' && *ptr <= '9') ptr++;
3174 if (*ptr == '.') ptr++;
3175 while (*ptr >= '0' && *ptr <= '9') ptr++;
3177 /* Either 'le', 'lf' or 'lg' must follow here */
3178 if (*ptr++ != 'l') return 1;
3179 if (*ptr == 'e' || *ptr == 'f' || *ptr == 'g') ptr++;
3180 else return 1;
3181 n++;
3182 }
3183 }
3185 return (n!=1);
3186 }
3189 int
3190 vdef_parse(gdes,str)
3191 struct graph_desc_t *gdes;
3192 char *str;
3193 {
3194 /* A VDEF currently is either "func" or "param,func"
3195 * so the parsing is rather simple. Change if needed.
3196 */
3197 double param;
3198 char func[30];
3199 int n;
3201 n=0;
3202 sscanf(str,"%le,%29[A-Z]%n",¶m,func,&n);
3203 if (n== (int)strlen(str)) { /* matched */
3204 ;
3205 } else {
3206 n=0;
3207 sscanf(str,"%29[A-Z]%n",func,&n);
3208 if (n== (int)strlen(str)) { /* matched */
3209 param=DNAN;
3210 } else {
3211 rrd_set_error("Unknown function string '%s' in VDEF '%s'"
3212 ,str
3213 ,gdes->vname
3214 );
3215 return -1;
3216 }
3217 }
3218 if (!strcmp("PERCENT",func)) gdes->vf.op = VDEF_PERCENT;
3219 else if (!strcmp("MAXIMUM",func)) gdes->vf.op = VDEF_MAXIMUM;
3220 else if (!strcmp("AVERAGE",func)) gdes->vf.op = VDEF_AVERAGE;
3221 else if (!strcmp("MINIMUM",func)) gdes->vf.op = VDEF_MINIMUM;
3222 else if (!strcmp("TOTAL", func)) gdes->vf.op = VDEF_TOTAL;
3223 else if (!strcmp("FIRST", func)) gdes->vf.op = VDEF_FIRST;
3224 else if (!strcmp("LAST", func)) gdes->vf.op = VDEF_LAST;
3225 else {
3226 rrd_set_error("Unknown function '%s' in VDEF '%s'\n"
3227 ,func
3228 ,gdes->vname
3229 );
3230 return -1;
3231 };
3233 switch (gdes->vf.op) {
3234 case VDEF_PERCENT:
3235 if (isnan(param)) { /* no parameter given */
3236 rrd_set_error("Function '%s' needs parameter in VDEF '%s'\n"
3237 ,func
3238 ,gdes->vname
3239 );
3240 return -1;
3241 };
3242 if (param>=0.0 && param<=100.0) {
3243 gdes->vf.param = param;
3244 gdes->vf.val = DNAN; /* undefined */
3245 gdes->vf.when = 0; /* undefined */
3246 } else {
3247 rrd_set_error("Parameter '%f' out of range in VDEF '%s'\n"
3248 ,param
3249 ,gdes->vname
3250 );
3251 return -1;
3252 };
3253 break;
3254 case VDEF_MAXIMUM:
3255 case VDEF_AVERAGE:
3256 case VDEF_MINIMUM:
3257 case VDEF_TOTAL:
3258 case VDEF_FIRST:
3259 case VDEF_LAST:
3260 if (isnan(param)) {
3261 gdes->vf.param = DNAN;
3262 gdes->vf.val = DNAN;
3263 gdes->vf.when = 0;
3264 } else {
3265 rrd_set_error("Function '%s' needs no parameter in VDEF '%s'\n"
3266 ,func
3267 ,gdes->vname
3268 );
3269 return -1;
3270 };
3271 break;
3272 };
3273 return 0;
3274 }
3277 int
3278 vdef_calc(im,gdi)
3279 image_desc_t *im;
3280 int gdi;
3281 {
3282 graph_desc_t *src,*dst;
3283 rrd_value_t *data;
3284 long step,steps;
3286 dst = &im->gdes[gdi];
3287 src = &im->gdes[dst->vidx];
3288 data = src->data + src->ds;
3289 steps = (src->end - src->start) / src->step;
3291 #if 0
3292 printf("DEBUG: start == %lu, end == %lu, %lu steps\n"
3293 ,src->start
3294 ,src->end
3295 ,steps
3296 );
3297 #endif
3299 switch (dst->vf.op) {
3300 case VDEF_PERCENT: {
3301 rrd_value_t * array;
3302 int field;
3305 if ((array = malloc(steps*sizeof(double)))==NULL) {
3306 rrd_set_error("malloc VDEV_PERCENT");
3307 return -1;
3308 }
3309 for (step=0;step < steps; step++) {
3310 array[step]=data[step*src->ds_cnt];
3311 }
3312 qsort(array,step,sizeof(double),vdef_percent_compar);
3314 field = (steps-1)*dst->vf.param/100;
3315 dst->vf.val = array[field];
3316 dst->vf.when = 0; /* no time component */
3317 free(array);
3318 #if 0
3319 for(step=0;step<steps;step++)
3320 printf("DEBUG: %3li:%10.2f %c\n",step,array[step],step==field?'*':' ');
3321 #endif
3322 }
3323 break;
3324 case VDEF_MAXIMUM:
3325 step=0;
3326 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3327 if (step == steps) {
3328 dst->vf.val = DNAN;
3329 dst->vf.when = 0;
3330 } else {
3331 dst->vf.val = data[step*src->ds_cnt];
3332 dst->vf.when = src->start + (step+1)*src->step;
3333 }
3334 while (step != steps) {
3335 if (finite(data[step*src->ds_cnt])) {
3336 if (data[step*src->ds_cnt] > dst->vf.val) {
3337 dst->vf.val = data[step*src->ds_cnt];
3338 dst->vf.when = src->start + (step+1)*src->step;
3339 }
3340 }
3341 step++;
3342 }
3343 break;
3344 case VDEF_TOTAL:
3345 case VDEF_AVERAGE: {
3346 int cnt=0;
3347 double sum=0.0;
3348 for (step=0;step<steps;step++) {
3349 if (finite(data[step*src->ds_cnt])) {
3350 sum += data[step*src->ds_cnt];
3351 cnt ++;
3352 };
3353 }
3354 if (cnt) {
3355 if (dst->vf.op == VDEF_TOTAL) {
3356 dst->vf.val = sum*src->step;
3357 dst->vf.when = cnt*src->step; /* not really "when" */
3358 } else {
3359 dst->vf.val = sum/cnt;
3360 dst->vf.when = 0; /* no time component */
3361 };
3362 } else {
3363 dst->vf.val = DNAN;
3364 dst->vf.when = 0;
3365 }
3366 }
3367 break;
3368 case VDEF_MINIMUM:
3369 step=0;
3370 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3371 if (step == steps) {
3372 dst->vf.val = DNAN;
3373 dst->vf.when = 0;
3374 } else {
3375 dst->vf.val = data[step*src->ds_cnt];
3376 dst->vf.when = src->start + (step+1)*src->step;
3377 }
3378 while (step != steps) {
3379 if (finite(data[step*src->ds_cnt])) {
3380 if (data[step*src->ds_cnt] < dst->vf.val) {
3381 dst->vf.val = data[step*src->ds_cnt];
3382 dst->vf.when = src->start + (step+1)*src->step;
3383 }
3384 }
3385 step++;
3386 }
3387 break;
3388 case VDEF_FIRST:
3389 /* The time value returned here is one step before the
3390 * actual time value. This is the start of the first
3391 * non-NaN interval.
3392 */
3393 step=0;
3394 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3395 if (step == steps) { /* all entries were NaN */
3396 dst->vf.val = DNAN;
3397 dst->vf.when = 0;
3398 } else {
3399 dst->vf.val = data[step*src->ds_cnt];
3400 dst->vf.when = src->start + step*src->step;
3401 }
3402 break;
3403 case VDEF_LAST:
3404 /* The time value returned here is the
3405 * actual time value. This is the end of the last
3406 * non-NaN interval.
3407 */
3408 step=steps-1;
3409 while (step >= 0 && isnan(data[step*src->ds_cnt])) step--;
3410 if (step < 0) { /* all entries were NaN */
3411 dst->vf.val = DNAN;
3412 dst->vf.when = 0;
3413 } else {
3414 dst->vf.val = data[step*src->ds_cnt];
3415 dst->vf.when = src->start + (step+1)*src->step;
3416 }
3417 break;
3418 }
3419 return 0;
3420 }
3422 /* NaN < -INF < finite_values < INF */
3423 int
3424 vdef_percent_compar(a,b)
3425 const void *a,*b;
3426 {
3427 /* Equality is not returned; this doesn't hurt except
3428 * (maybe) for a little performance.
3429 */
3431 /* First catch NaN values. They are smallest */
3432 if (isnan( *(double *)a )) return -1;
3433 if (isnan( *(double *)b )) return 1;
3435 /* NaN doesn't reach this part so INF and -INF are extremes.
3436 * The sign from isinf() is compatible with the sign we return
3437 */
3438 if (isinf( *(double *)a )) return isinf( *(double *)a );
3439 if (isinf( *(double *)b )) return isinf( *(double *)b );
3441 /* If we reach this, both values must be finite */
3442 if ( *(double *)a < *(double *)b ) return -1; else return 1;
3443 }