9597daff9479605049669bfeec859135715f7e40
1 /****************************************************************************
2 * RRDtool 1.1.x Copyright Tobias Oetiker, 1997 - 2002
3 ****************************************************************************
4 * rrd__graph.c make creates ne rrds
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 #ifndef WIN32
36 #define RRD_DEFAULT_FONT "VeraMono.ttf"
37 /* #define RRD_DEFAULT_FONT "/usr/share/fonts/truetype/openoffice/ariosor.ttf" */
38 /* #define RRD_DEFAULT_FONT "/usr/share/fonts/truetype/Arial.ttf" */
39 #endif
40 #endif
42 text_prop_t text_prop[] = {
43 { 10.0, RRD_DEFAULT_FONT }, /* default */
44 { 10.0, RRD_DEFAULT_FONT }, /* title */
45 { 8.0, RRD_DEFAULT_FONT }, /* axis */
46 { 10.0, RRD_DEFAULT_FONT }, /* unit */
47 { 10.0, RRD_DEFAULT_FONT } /* legend */
48 };
50 xlab_t xlab[] = {
51 {0, TMT_SECOND,30, TMT_MINUTE,5, TMT_MINUTE,5, 0,"%H:%M"},
52 {2, TMT_MINUTE,1, TMT_MINUTE,5, TMT_MINUTE,5, 0,"%H:%M"},
53 {5, TMT_MINUTE,2, TMT_MINUTE,10, TMT_MINUTE,10, 0,"%H:%M"},
54 {10, TMT_MINUTE,5, TMT_MINUTE,20, TMT_MINUTE,20, 0,"%H:%M"},
55 {30, TMT_MINUTE,10, TMT_HOUR,1, TMT_HOUR,1, 0,"%H:%M"},
56 {60, TMT_MINUTE,30, TMT_HOUR,2, TMT_HOUR,2, 0,"%H:%M"},
57 {180, TMT_HOUR,1, TMT_HOUR,6, TMT_HOUR,6, 0,"%H:%M"},
58 /*{300, TMT_HOUR,3, TMT_HOUR,12, TMT_HOUR,12, 12*3600,"%a %p"}, this looks silly*/
59 {600, TMT_HOUR,6, TMT_DAY,1, TMT_DAY,1, 24*3600,"%a"},
60 {1800, TMT_HOUR,12, TMT_DAY,1, TMT_DAY,2, 24*3600,"%a"},
61 {3600, TMT_DAY,1, TMT_WEEK,1, TMT_WEEK,1, 7*24*3600,"Week %V"},
62 {3*3600, TMT_WEEK,1, TMT_MONTH,1, TMT_WEEK,2, 7*24*3600,"Week %V"},
63 {6*3600, TMT_MONTH,1, TMT_MONTH,1, TMT_MONTH,1, 30*24*3600,"%b"},
64 {48*3600, TMT_MONTH,1, TMT_MONTH,3, TMT_MONTH,3, 30*24*3600,"%b"},
65 {10*24*3600, TMT_YEAR,1, TMT_YEAR,1, TMT_YEAR,1, 365*24*3600,"%y"},
66 {-1,TMT_MONTH,0,TMT_MONTH,0,TMT_MONTH,0,0,""}
67 };
69 /* sensible logarithmic y label intervals ...
70 the first element of each row defines the possible starting points on the
71 y axis ... the other specify the */
73 double yloglab[][12]= {{ 1e9, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
74 { 1e3, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
75 { 1e1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
76 /* { 1e1, 1, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, */
77 { 1e1, 1, 2.5, 5, 7.5, 0, 0, 0, 0, 0, 0, 0 },
78 { 1e1, 1, 2, 4, 6, 8, 0, 0, 0, 0, 0, 0 },
79 { 1e1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0 },
80 { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }};
82 /* sensible y label intervals ...*/
84 ylab_t ylab[]= {
85 {0.1, {1,2, 5,10}},
86 {0.2, {1,5,10,20}},
87 {0.5, {1,2, 4,10}},
88 {1.0, {1,2, 5,10}},
89 {2.0, {1,5,10,20}},
90 {5.0, {1,2, 4,10}},
91 {10.0, {1,2, 5,10}},
92 {20.0, {1,5,10,20}},
93 {50.0, {1,2, 4,10}},
94 {100.0, {1,2, 5,10}},
95 {200.0, {1,5,10,20}},
96 {500.0, {1,2, 4,10}},
97 {0.0, {0,0,0,0}}};
100 gfx_color_t graph_col[] = /* default colors */
101 { 0xFFFFFFFF, /* canvas */
102 0xF0F0F0FF, /* background */
103 0xD0D0D0FF, /* shade A */
104 0xA0A0A0FF, /* shade B */
105 0x909090FF, /* grid */
106 0xE05050FF, /* major grid */
107 0x000000FF, /* font */
108 0x000000FF, /* frame */
109 0xFF0000FF /* arrow */
110 };
113 /* #define DEBUG */
115 #ifdef DEBUG
116 # define DPRINT(x) (void)(printf x, printf("\n"))
117 #else
118 # define DPRINT(x)
119 #endif
122 /* initialize with xtr(im,0); */
123 int
124 xtr(image_desc_t *im,time_t mytime){
125 static double pixie;
126 if (mytime==0){
127 pixie = (double) im->xsize / (double)(im->end - im->start);
128 return im->xorigin;
129 }
130 return (int)((double)im->xorigin
131 + pixie * ( mytime - im->start ) );
132 }
134 /* translate data values into y coordinates */
135 double
136 ytr(image_desc_t *im, double value){
137 static double pixie;
138 double yval;
139 if (isnan(value)){
140 if(!im->logarithmic)
141 pixie = (double) im->ysize / (im->maxval - im->minval);
142 else
143 pixie = (double) im->ysize / (log10(im->maxval) - log10(im->minval));
144 yval = im->yorigin;
145 } else if(!im->logarithmic) {
146 yval = im->yorigin - pixie * (value - im->minval);
147 } else {
148 if (value < im->minval) {
149 yval = im->yorigin;
150 } else {
151 yval = im->yorigin - pixie * (log10(value) - log10(im->minval));
152 }
153 }
154 /* make sure we don't return anything too unreasonable. GD lib can
155 get terribly slow when drawing lines outside its scope. This is
156 especially problematic in connection with the rigid option */
157 if (! im->rigid) {
158 /* keep yval as-is */
159 } else if (yval > im->yorigin) {
160 yval = im->yorigin+2;
161 } else if (yval < im->yorigin - im->ysize){
162 yval = im->yorigin - im->ysize - 2;
163 }
164 return yval;
165 }
169 /* conversion function for symbolic entry names */
172 #define conv_if(VV,VVV) \
173 if (strcmp(#VV, string) == 0) return VVV ;
175 enum gf_en gf_conv(char *string){
177 conv_if(PRINT,GF_PRINT)
178 conv_if(GPRINT,GF_GPRINT)
179 conv_if(COMMENT,GF_COMMENT)
180 conv_if(HRULE,GF_HRULE)
181 conv_if(VRULE,GF_VRULE)
182 conv_if(LINE,GF_LINE)
183 conv_if(AREA,GF_AREA)
184 conv_if(STACK,GF_STACK)
185 conv_if(TICK,GF_TICK)
186 conv_if(DEF,GF_DEF)
187 conv_if(CDEF,GF_CDEF)
188 conv_if(VDEF,GF_VDEF)
189 conv_if(PART,GF_PART)
190 conv_if(XPORT,GF_XPORT)
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(FRAME,GRC_FRAME)
227 conv_if(ARROW,GRC_ARROW)
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].start == im->gdes[ii].start)
701 && (im->gdes[i].end == im->gdes[ii].end)
702 && (im->gdes[i].step == im->gdes[ii].step)) {
703 /* OK, the data is already there.
704 ** Just copy the header portion
705 */
706 im->gdes[i].start = im->gdes[ii].start;
707 im->gdes[i].end = im->gdes[ii].end;
708 im->gdes[i].step = im->gdes[ii].step;
709 im->gdes[i].ds_cnt = im->gdes[ii].ds_cnt;
710 im->gdes[i].ds_namv = im->gdes[ii].ds_namv;
711 im->gdes[i].data = im->gdes[ii].data;
712 im->gdes[i].data_first = 0;
713 skip=1;
714 }
715 if (skip)
716 break;
717 }
718 if (! skip) {
719 unsigned long ft_step = im->gdes[i].step ;
721 if((rrd_fetch_fn(im->gdes[i].rrd,
722 im->gdes[i].cf,
723 &im->gdes[i].start,
724 &im->gdes[i].end,
725 &ft_step,
726 &im->gdes[i].ds_cnt,
727 &im->gdes[i].ds_namv,
728 &im->gdes[i].data)) == -1){
729 return -1;
730 }
731 im->gdes[i].data_first = 1;
733 if (ft_step < im->gdes[i].step) {
734 reduce_data(im->gdes[i].cf,
735 ft_step,
736 &im->gdes[i].start,
737 &im->gdes[i].end,
738 &im->gdes[i].step,
739 &im->gdes[i].ds_cnt,
740 &im->gdes[i].data);
741 } else {
742 im->gdes[i].step = ft_step;
743 }
744 }
746 /* lets see if the required data source is really there */
747 for(ii=0;ii<(int)im->gdes[i].ds_cnt;ii++){
748 if(strcmp(im->gdes[i].ds_namv[ii],im->gdes[i].ds_nam) == 0){
749 im->gdes[i].ds=ii; }
750 }
751 if (im->gdes[i].ds== -1){
752 rrd_set_error("No DS called '%s' in '%s'",
753 im->gdes[i].ds_nam,im->gdes[i].rrd);
754 return -1;
755 }
757 }
758 return 0;
759 }
761 /* evaluate the expressions in the CDEF functions */
763 /*************************************************************
764 * CDEF stuff
765 *************************************************************/
767 long
768 find_var_wrapper(void *arg1, char *key)
769 {
770 return find_var((image_desc_t *) arg1, key);
771 }
773 /* find gdes containing var*/
774 long
775 find_var(image_desc_t *im, char *key){
776 long ii;
777 for(ii=0;ii<im->gdes_c-1;ii++){
778 if((im->gdes[ii].gf == GF_DEF
779 || im->gdes[ii].gf == GF_VDEF
780 || im->gdes[ii].gf == GF_CDEF)
781 && (strcmp(im->gdes[ii].vname,key) == 0)){
782 return ii;
783 }
784 }
785 return -1;
786 }
788 /* find the largest common denominator for all the numbers
789 in the 0 terminated num array */
790 long
791 lcd(long *num){
792 long rest;
793 int i;
794 for (i=0;num[i+1]!=0;i++){
795 do {
796 rest=num[i] % num[i+1];
797 num[i]=num[i+1]; num[i+1]=rest;
798 } while (rest!=0);
799 num[i+1] = num[i];
800 }
801 /* return i==0?num[i]:num[i-1]; */
802 return num[i];
803 }
805 /* run the rpn calculator on all the VDEF and CDEF arguments */
806 int
807 data_calc( image_desc_t *im){
809 int gdi;
810 int dataidx;
811 long *steparray, rpi;
812 int stepcnt;
813 time_t now;
814 rpnstack_t rpnstack;
816 rpnstack_init(&rpnstack);
818 for (gdi=0;gdi<im->gdes_c;gdi++){
819 /* Look for GF_VDEF and GF_CDEF in the same loop,
820 * so CDEFs can use VDEFs and vice versa
821 */
822 switch (im->gdes[gdi].gf) {
823 case GF_XPORT:
824 break;
825 case GF_VDEF:
826 /* A VDEF has no DS. This also signals other parts
827 * of rrdtool that this is a VDEF value, not a CDEF.
828 */
829 im->gdes[gdi].ds_cnt = 0;
830 if (vdef_calc(im,gdi)) {
831 rrd_set_error("Error processing VDEF '%s'"
832 ,im->gdes[gdi].vname
833 );
834 rpnstack_free(&rpnstack);
835 return -1;
836 }
837 break;
838 case GF_CDEF:
839 im->gdes[gdi].ds_cnt = 1;
840 im->gdes[gdi].ds = 0;
841 im->gdes[gdi].data_first = 1;
842 im->gdes[gdi].start = 0;
843 im->gdes[gdi].end = 0;
844 steparray=NULL;
845 stepcnt = 0;
846 dataidx=-1;
848 /* Find the variables in the expression.
849 * - VDEF variables are substituted by their values
850 * and the opcode is changed into OP_NUMBER.
851 * - CDEF variables are analized for their step size,
852 * the lowest common denominator of all the step
853 * sizes of the data sources involved is calculated
854 * and the resulting number is the step size for the
855 * resulting data source.
856 */
857 for(rpi=0;im->gdes[gdi].rpnp[rpi].op != OP_END;rpi++){
858 if(im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
859 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER){
860 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
861 if (im->gdes[ptr].ds_cnt == 0) {
862 #if 0
863 printf("DEBUG: inside CDEF '%s' processing VDEF '%s'\n",
864 im->gdes[gdi].vname,
865 im->gdes[ptr].vname);
866 printf("DEBUG: value from vdef is %f\n",im->gdes[ptr].vf.val);
867 #endif
868 im->gdes[gdi].rpnp[rpi].val = im->gdes[ptr].vf.val;
869 im->gdes[gdi].rpnp[rpi].op = OP_NUMBER;
870 } else {
871 if ((steparray =
872 rrd_realloc(steparray,
873 (++stepcnt+1)*sizeof(*steparray)))==NULL){
874 rrd_set_error("realloc steparray");
875 rpnstack_free(&rpnstack);
876 return -1;
877 };
879 steparray[stepcnt-1] = im->gdes[ptr].step;
881 /* adjust start and end of cdef (gdi) so
882 * that it runs from the latest start point
883 * to the earliest endpoint of any of the
884 * rras involved (ptr)
885 */
886 if(im->gdes[gdi].start < im->gdes[ptr].start)
887 im->gdes[gdi].start = im->gdes[ptr].start;
889 if(im->gdes[gdi].end == 0 ||
890 im->gdes[gdi].end > im->gdes[ptr].end)
891 im->gdes[gdi].end = im->gdes[ptr].end;
893 /* store pointer to the first element of
894 * the rra providing data for variable,
895 * further save step size and data source
896 * count of this rra
897 */
898 im->gdes[gdi].rpnp[rpi].data = im->gdes[ptr].data + im->gdes[ptr].ds;
899 im->gdes[gdi].rpnp[rpi].step = im->gdes[ptr].step;
900 im->gdes[gdi].rpnp[rpi].ds_cnt = im->gdes[ptr].ds_cnt;
902 /* backoff the *.data ptr; this is done so
903 * rpncalc() function doesn't have to treat
904 * the first case differently
905 */
906 } /* if ds_cnt != 0 */
907 } /* if OP_VARIABLE */
908 } /* loop through all rpi */
910 /* move the data pointers to the correct period */
911 for(rpi=0;im->gdes[gdi].rpnp[rpi].op != OP_END;rpi++){
912 if(im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
913 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER){
914 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
915 if(im->gdes[gdi].start > im->gdes[ptr].start) {
916 im->gdes[gdi].rpnp[rpi].data += im->gdes[gdi].rpnp[rpi].ds_cnt;
917 }
918 }
919 }
922 if(steparray == NULL){
923 rrd_set_error("rpn expressions without DEF"
924 " or CDEF variables are not supported");
925 rpnstack_free(&rpnstack);
926 return -1;
927 }
928 steparray[stepcnt]=0;
929 /* Now find the resulting step. All steps in all
930 * used RRAs have to be visited
931 */
932 im->gdes[gdi].step = lcd(steparray);
933 free(steparray);
934 if((im->gdes[gdi].data = malloc((
935 (im->gdes[gdi].end-im->gdes[gdi].start)
936 / im->gdes[gdi].step)
937 * sizeof(double)))==NULL){
938 rrd_set_error("malloc im->gdes[gdi].data");
939 rpnstack_free(&rpnstack);
940 return -1;
941 }
943 /* Step through the new cdef results array and
944 * calculate the values
945 */
946 for (now = im->gdes[gdi].start + im->gdes[gdi].step;
947 now<=im->gdes[gdi].end;
948 now += im->gdes[gdi].step)
949 {
950 rpnp_t *rpnp = im -> gdes[gdi].rpnp;
952 /* 3rd arg of rpn_calc is for OP_VARIABLE lookups;
953 * in this case we are advancing by timesteps;
954 * we use the fact that time_t is a synonym for long
955 */
956 if (rpn_calc(rpnp,&rpnstack,(long) now,
957 im->gdes[gdi].data,++dataidx) == -1) {
958 /* rpn_calc sets the error string */
959 rpnstack_free(&rpnstack);
960 return -1;
961 }
962 } /* enumerate over time steps within a CDEF */
963 break;
964 default:
965 continue;
966 }
967 } /* enumerate over CDEFs */
968 rpnstack_free(&rpnstack);
969 return 0;
970 }
972 /* massage data so, that we get one value for each x coordinate in the graph */
973 int
974 data_proc( image_desc_t *im ){
975 long i,ii;
976 double pixstep = (double)(im->end-im->start)
977 /(double)im->xsize; /* how much time
978 passes in one pixel */
979 double paintval;
980 double minval=DNAN,maxval=DNAN;
982 unsigned long gr_time;
984 /* memory for the processed data */
985 for(i=0;i<im->gdes_c;i++) {
986 if((im->gdes[i].gf==GF_LINE) ||
987 (im->gdes[i].gf==GF_AREA) ||
988 (im->gdes[i].gf==GF_TICK) ||
989 (im->gdes[i].gf==GF_STACK)) {
990 if((im->gdes[i].p_data = malloc((im->xsize +1)
991 * sizeof(rrd_value_t)))==NULL){
992 rrd_set_error("malloc data_proc");
993 return -1;
994 }
995 }
996 }
998 for (i=0;i<im->xsize;i++) { /* for each pixel */
999 long vidx;
1000 gr_time = im->start+pixstep*i; /* time of the current step */
1001 paintval=0.0;
1003 for (ii=0;ii<im->gdes_c;ii++) {
1004 double value;
1005 switch (im->gdes[ii].gf) {
1006 case GF_LINE:
1007 case GF_AREA:
1008 case GF_TICK:
1009 if (!im->gdes[ii].stack)
1010 paintval = 0.0;
1011 case GF_STACK:
1012 value = im->gdes[ii].yrule;
1013 if (isnan(value) || (im->gdes[ii].gf == GF_TICK)) {
1014 /* The time of the data doesn't necessarily match
1015 ** the time of the graph. Beware.
1016 */
1017 vidx = im->gdes[ii].vidx;
1018 if ( ((long int)gr_time >= (long int)im->gdes[vidx].start) &&
1019 ((long int)gr_time <= (long int)im->gdes[vidx].end) ) {
1020 value = im->gdes[vidx].data[
1021 (unsigned long) floor(
1022 (double)(gr_time - im->gdes[vidx].start)
1023 / im->gdes[vidx].step)
1024 * im->gdes[vidx].ds_cnt
1025 + im->gdes[vidx].ds
1026 ];
1027 } else {
1028 value = DNAN;
1029 }
1030 };
1032 if (! isnan(value)) {
1033 paintval += value;
1034 im->gdes[ii].p_data[i] = paintval;
1035 /* GF_TICK: the data values are not
1036 ** relevant for min and max
1037 */
1038 if (finite(paintval) && im->gdes[ii].gf != GF_TICK ) {
1039 if (isnan(minval) || paintval < minval)
1040 minval = paintval;
1041 if (isnan(maxval) || paintval > maxval)
1042 maxval = paintval;
1043 }
1044 } else {
1045 im->gdes[ii].p_data[i] = DNAN;
1046 }
1047 break;
1048 default:
1049 break;
1050 }
1051 }
1052 }
1054 /* if min or max have not been asigned a value this is because
1055 there was no data in the graph ... this is not good ...
1056 lets set these to dummy values then ... */
1058 if (isnan(minval)) minval = 0.0;
1059 if (isnan(maxval)) maxval = 1.0;
1061 /* adjust min and max values */
1062 if (isnan(im->minval)
1063 /* don't adjust low-end with log scale */
1064 || ((!im->logarithmic && !im->rigid) && im->minval > minval)
1065 )
1066 im->minval = minval;
1067 if (isnan(im->maxval)
1068 || (!im->rigid && im->maxval < maxval)
1069 ) {
1070 if (im->logarithmic)
1071 im->maxval = maxval * 1.1;
1072 else
1073 im->maxval = maxval;
1074 }
1075 /* make sure min is smaller than max */
1076 if (im->minval > im->maxval) {
1077 im->minval = 0.99 * im->maxval;
1078 }
1080 /* make sure min and max are not equal */
1081 if (im->minval == im->maxval) {
1082 im->maxval *= 1.01;
1083 if (! im->logarithmic) {
1084 im->minval *= 0.99;
1085 }
1086 /* make sure min and max are not both zero */
1087 if (im->maxval == 0.0) {
1088 im->maxval = 1.0;
1089 }
1090 }
1091 return 0;
1092 }
1096 /* identify the point where the first gridline, label ... gets placed */
1098 time_t
1099 find_first_time(
1100 time_t start, /* what is the initial time */
1101 enum tmt_en baseint, /* what is the basic interval */
1102 long basestep /* how many if these do we jump a time */
1103 )
1104 {
1105 struct tm tm;
1106 localtime_r(&start, &tm);
1107 switch(baseint){
1108 case TMT_SECOND:
1109 tm.tm_sec -= tm.tm_sec % basestep; break;
1110 case TMT_MINUTE:
1111 tm.tm_sec=0;
1112 tm.tm_min -= tm.tm_min % basestep;
1113 break;
1114 case TMT_HOUR:
1115 tm.tm_sec=0;
1116 tm.tm_min = 0;
1117 tm.tm_hour -= tm.tm_hour % basestep; break;
1118 case TMT_DAY:
1119 /* we do NOT look at the basestep for this ... */
1120 tm.tm_sec=0;
1121 tm.tm_min = 0;
1122 tm.tm_hour = 0; break;
1123 case TMT_WEEK:
1124 /* we do NOT look at the basestep for this ... */
1125 tm.tm_sec=0;
1126 tm.tm_min = 0;
1127 tm.tm_hour = 0;
1128 tm.tm_mday -= tm.tm_wday -1; /* -1 because we want the monday */
1129 if (tm.tm_wday==0) tm.tm_mday -= 7; /* we want the *previous* monday */
1130 break;
1131 case TMT_MONTH:
1132 tm.tm_sec=0;
1133 tm.tm_min = 0;
1134 tm.tm_hour = 0;
1135 tm.tm_mday = 1;
1136 tm.tm_mon -= tm.tm_mon % basestep; break;
1138 case TMT_YEAR:
1139 tm.tm_sec=0;
1140 tm.tm_min = 0;
1141 tm.tm_hour = 0;
1142 tm.tm_mday = 1;
1143 tm.tm_mon = 0;
1144 tm.tm_year -= (tm.tm_year+1900) % basestep;
1146 }
1147 return mktime(&tm);
1148 }
1149 /* identify the point where the next gridline, label ... gets placed */
1150 time_t
1151 find_next_time(
1152 time_t current, /* what is the initial time */
1153 enum tmt_en baseint, /* what is the basic interval */
1154 long basestep /* how many if these do we jump a time */
1155 )
1156 {
1157 struct tm tm;
1158 time_t madetime;
1159 localtime_r(¤t, &tm);
1160 do {
1161 switch(baseint){
1162 case TMT_SECOND:
1163 tm.tm_sec += basestep; break;
1164 case TMT_MINUTE:
1165 tm.tm_min += basestep; break;
1166 case TMT_HOUR:
1167 tm.tm_hour += basestep; break;
1168 case TMT_DAY:
1169 tm.tm_mday += basestep; break;
1170 case TMT_WEEK:
1171 tm.tm_mday += 7*basestep; break;
1172 case TMT_MONTH:
1173 tm.tm_mon += basestep; break;
1174 case TMT_YEAR:
1175 tm.tm_year += basestep;
1176 }
1177 madetime = mktime(&tm);
1178 } while (madetime == -1); /* this is necessary to skip impssible times
1179 like the daylight saving time skips */
1180 return madetime;
1182 }
1185 /* calculate values required for PRINT and GPRINT functions */
1187 int
1188 print_calc(image_desc_t *im, char ***prdata)
1189 {
1190 long i,ii,validsteps;
1191 double printval;
1192 time_t printtime;
1193 int graphelement = 0;
1194 long vidx;
1195 int max_ii;
1196 double magfact = -1;
1197 char *si_symb = "";
1198 char *percent_s;
1199 int prlines = 1;
1200 if (im->imginfo) prlines++;
1201 for(i=0;i<im->gdes_c;i++){
1202 switch(im->gdes[i].gf){
1203 case GF_PRINT:
1204 prlines++;
1205 if(((*prdata) = rrd_realloc((*prdata),prlines*sizeof(char *)))==NULL){
1206 rrd_set_error("realloc prdata");
1207 return 0;
1208 }
1209 case GF_GPRINT:
1210 /* PRINT and GPRINT can now print VDEF generated values.
1211 * There's no need to do any calculations on them as these
1212 * calculations were already made.
1213 */
1214 vidx = im->gdes[i].vidx;
1215 if (im->gdes[vidx].gf==GF_VDEF) { /* simply use vals */
1216 printval = im->gdes[vidx].vf.val;
1217 printtime = im->gdes[vidx].vf.when;
1218 } else { /* need to calculate max,min,avg etcetera */
1219 max_ii =((im->gdes[vidx].end
1220 - im->gdes[vidx].start)
1221 / im->gdes[vidx].step
1222 * im->gdes[vidx].ds_cnt);
1223 printval = DNAN;
1224 validsteps = 0;
1225 for( ii=im->gdes[vidx].ds;
1226 ii < max_ii;
1227 ii+=im->gdes[vidx].ds_cnt){
1228 if (! finite(im->gdes[vidx].data[ii]))
1229 continue;
1230 if (isnan(printval)){
1231 printval = im->gdes[vidx].data[ii];
1232 validsteps++;
1233 continue;
1234 }
1236 switch (im->gdes[i].cf){
1237 case CF_HWPREDICT:
1238 case CF_DEVPREDICT:
1239 case CF_DEVSEASONAL:
1240 case CF_SEASONAL:
1241 case CF_AVERAGE:
1242 validsteps++;
1243 printval += im->gdes[vidx].data[ii];
1244 break;
1245 case CF_MINIMUM:
1246 printval = min( printval, im->gdes[vidx].data[ii]);
1247 break;
1248 case CF_FAILURES:
1249 case CF_MAXIMUM:
1250 printval = max( printval, im->gdes[vidx].data[ii]);
1251 break;
1252 case CF_LAST:
1253 printval = im->gdes[vidx].data[ii];
1254 }
1255 }
1256 if (im->gdes[i].cf==CF_AVERAGE || im->gdes[i].cf > CF_LAST) {
1257 if (validsteps > 1) {
1258 printval = (printval / validsteps);
1259 }
1260 }
1261 } /* prepare printval */
1263 if (!strcmp(im->gdes[i].format,"%c")) { /* VDEF time print */
1264 char ctime_buf[128]; /* PS: for ctime_r, must be >= 26 chars */
1265 if (im->gdes[i].gf == GF_PRINT){
1266 (*prdata)[prlines-2] = malloc((FMT_LEG_LEN+2)*sizeof(char));
1267 sprintf((*prdata)[prlines-2],"%s (%lu)",
1268 ctime_r(&printtime,ctime_buf),printtime);
1269 (*prdata)[prlines-1] = NULL;
1270 } else {
1271 sprintf(im->gdes[i].legend,"%s (%lu)",
1272 ctime_r(&printtime,ctime_buf),printtime);
1273 graphelement = 1;
1274 }
1275 } else {
1276 if ((percent_s = strstr(im->gdes[i].format,"%S")) != NULL) {
1277 /* Magfact is set to -1 upon entry to print_calc. If it
1278 * is still less than 0, then we need to run auto_scale.
1279 * Otherwise, put the value into the correct units. If
1280 * the value is 0, then do not set the symbol or magnification
1281 * so next the calculation will be performed again. */
1282 if (magfact < 0.0) {
1283 auto_scale(im,&printval,&si_symb,&magfact);
1284 if (printval == 0.0)
1285 magfact = -1.0;
1286 } else {
1287 printval /= magfact;
1288 }
1289 *(++percent_s) = 's';
1290 } else if (strstr(im->gdes[i].format,"%s") != NULL) {
1291 auto_scale(im,&printval,&si_symb,&magfact);
1292 }
1294 if (im->gdes[i].gf == GF_PRINT){
1295 (*prdata)[prlines-2] = malloc((FMT_LEG_LEN+2)*sizeof(char));
1296 (*prdata)[prlines-1] = NULL;
1297 if (bad_format(im->gdes[i].format)) {
1298 rrd_set_error("bad format for [G]PRINT in '%s'", im->gdes[i].format);
1299 return -1;
1300 }
1301 #ifdef HAVE_SNPRINTF
1302 snprintf((*prdata)[prlines-2],FMT_LEG_LEN,im->gdes[i].format,printval,si_symb);
1303 #else
1304 sprintf((*prdata)[prlines-2],im->gdes[i].format,printval,si_symb);
1305 #endif
1306 } else {
1307 /* GF_GPRINT */
1309 if (bad_format(im->gdes[i].format)) {
1310 rrd_set_error("bad format for [G]PRINT in '%s'", im->gdes[i].format);
1311 return -1;
1312 }
1313 #ifdef HAVE_SNPRINTF
1314 snprintf(im->gdes[i].legend,FMT_LEG_LEN-2,im->gdes[i].format,printval,si_symb);
1315 #else
1316 sprintf(im->gdes[i].legend,im->gdes[i].format,printval,si_symb);
1317 #endif
1318 graphelement = 1;
1319 }
1320 }
1321 break;
1322 case GF_LINE:
1323 case GF_AREA:
1324 case GF_TICK:
1325 case GF_STACK:
1326 case GF_HRULE:
1327 case GF_VRULE:
1328 graphelement = 1;
1329 break;
1330 case GF_COMMENT:
1331 case GF_DEF:
1332 case GF_CDEF:
1333 case GF_VDEF:
1334 case GF_PART:
1335 case GF_XPORT:
1336 break;
1337 }
1338 }
1339 return graphelement;
1340 }
1343 /* place legends with color spots */
1344 int
1345 leg_place(image_desc_t *im)
1346 {
1347 /* graph labels */
1348 int interleg = im->text_prop[TEXT_PROP_LEGEND].size*2.0;
1349 int box =im->text_prop[TEXT_PROP_LEGEND].size*1.5;
1350 int border = im->text_prop[TEXT_PROP_LEGEND].size*2.0;
1351 int fill=0, fill_last;
1352 int leg_c = 0;
1353 int leg_x = border, leg_y = im->yimg;
1354 int leg_cc;
1355 int glue = 0;
1356 int i,ii, mark = 0;
1357 char prt_fctn; /*special printfunctions */
1358 int *legspace;
1360 if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
1361 if ((legspace = malloc(im->gdes_c*sizeof(int)))==NULL){
1362 rrd_set_error("malloc for legspace");
1363 return -1;
1364 }
1366 for(i=0;i<im->gdes_c;i++){
1367 fill_last = fill;
1369 /* hid legends for rules which are not displayed */
1371 if (im->gdes[i].gf == GF_HRULE &&
1372 (im->gdes[i].yrule < im->minval || im->gdes[i].yrule > im->maxval))
1373 im->gdes[i].legend[0] = '\0';
1375 if (im->gdes[i].gf == GF_VRULE &&
1376 (im->gdes[i].xrule < im->start || im->gdes[i].xrule > im->end))
1377 im->gdes[i].legend[0] = '\0';
1379 leg_cc = strlen(im->gdes[i].legend);
1381 /* is there a controle code ant the end of the legend string ? */
1382 if (leg_cc >= 2 && im->gdes[i].legend[leg_cc-2] == '\\') {
1383 prt_fctn = im->gdes[i].legend[leg_cc-1];
1384 leg_cc -= 2;
1385 im->gdes[i].legend[leg_cc] = '\0';
1386 } else {
1387 prt_fctn = '\0';
1388 }
1389 /* remove exess space */
1390 while (prt_fctn=='g' &&
1391 leg_cc > 0 &&
1392 im->gdes[i].legend[leg_cc-1]==' '){
1393 leg_cc--;
1394 im->gdes[i].legend[leg_cc]='\0';
1395 }
1396 if (leg_cc != 0 ){
1397 legspace[i]=(prt_fctn=='g' ? 0 : interleg);
1399 if (fill > 0){
1400 /* no interleg space if string ends in \g */
1401 fill += legspace[i];
1402 }
1403 if (im->gdes[i].gf != GF_GPRINT &&
1404 im->gdes[i].gf != GF_COMMENT) {
1405 fill += box;
1406 }
1407 fill += gfx_get_text_width(im->canvas, fill+border,
1408 im->text_prop[TEXT_PROP_LEGEND].font,
1409 im->text_prop[TEXT_PROP_LEGEND].size,
1410 im->tabwidth,
1411 im->gdes[i].legend, 0);
1412 leg_c++;
1413 } else {
1414 legspace[i]=0;
1415 }
1416 /* who said there was a special tag ... ?*/
1417 if (prt_fctn=='g') {
1418 prt_fctn = '\0';
1419 }
1420 if (prt_fctn == '\0') {
1421 if (i == im->gdes_c -1 ) prt_fctn ='l';
1423 /* is it time to place the legends ? */
1424 if (fill > im->ximg - 2*border){
1425 if (leg_c > 1) {
1426 /* go back one */
1427 i--;
1428 fill = fill_last;
1429 leg_c--;
1430 prt_fctn = 'j';
1431 } else {
1432 prt_fctn = 'l';
1433 }
1435 }
1436 }
1439 if (prt_fctn != '\0'){
1440 leg_x = border;
1441 if (leg_c >= 2 && prt_fctn == 'j') {
1442 glue = (im->ximg - fill - 2* border) / (leg_c-1);
1443 } else {
1444 glue = 0;
1445 }
1446 if (prt_fctn =='c') leg_x = (im->ximg - fill) / 2.0;
1447 if (prt_fctn =='r') leg_x = im->ximg - fill - border;
1449 for(ii=mark;ii<=i;ii++){
1450 if(im->gdes[ii].legend[0]=='\0')
1451 continue;
1452 im->gdes[ii].leg_x = leg_x;
1453 im->gdes[ii].leg_y = leg_y;
1454 leg_x +=
1455 gfx_get_text_width(im->canvas, leg_x,
1456 im->text_prop[TEXT_PROP_LEGEND].font,
1457 im->text_prop[TEXT_PROP_LEGEND].size,
1458 im->tabwidth,
1459 im->gdes[ii].legend, 0)
1460 + legspace[ii]
1461 + glue;
1462 if (im->gdes[ii].gf != GF_GPRINT &&
1463 im->gdes[ii].gf != GF_COMMENT)
1464 leg_x += box;
1465 }
1466 leg_y = leg_y + im->text_prop[TEXT_PROP_LEGEND].size*1.2;
1467 if (prt_fctn == 's') leg_y -= im->text_prop[TEXT_PROP_LEGEND].size*1.2;
1468 fill = 0;
1469 leg_c = 0;
1470 mark = ii;
1471 }
1472 }
1473 im->yimg = leg_y;
1474 free(legspace);
1475 }
1476 return 0;
1477 }
1479 /* create a grid on the graph. it determines what to do
1480 from the values of xsize, start and end */
1482 /* the xaxis labels are determined from the number of seconds per pixel
1483 in the requested graph */
1487 int
1488 calc_horizontal_grid(image_desc_t *im)
1489 {
1490 double range;
1491 double scaledrange;
1492 int pixel,i;
1493 int gridind;
1494 int decimals, fractionals;
1496 im->ygrid_scale.labfact=2;
1497 gridind=-1;
1498 range = im->maxval - im->minval;
1499 scaledrange = range / im->magfact;
1501 /* does the scale of this graph make it impossible to put lines
1502 on it? If so, give up. */
1503 if (isnan(scaledrange)) {
1504 return 0;
1505 }
1507 /* find grid spaceing */
1508 pixel=1;
1509 if(isnan(im->ygridstep)){
1510 if(im->extra_flags & ALTYGRID) {
1511 /* find the value with max number of digits. Get number of digits */
1512 decimals = ceil(log10(max(fabs(im->maxval), fabs(im->minval))));
1513 if(decimals <= 0) /* everything is small. make place for zero */
1514 decimals = 1;
1516 fractionals = floor(log10(range));
1517 if(fractionals < 0) /* small amplitude. */
1518 sprintf(im->ygrid_scale.labfmt, "%%%d.%df", decimals - fractionals + 1, -fractionals + 1);
1519 else
1520 sprintf(im->ygrid_scale.labfmt, "%%%d.1f", decimals + 1);
1521 im->ygrid_scale.gridstep = pow((double)10, (double)fractionals);
1522 if(im->ygrid_scale.gridstep == 0) /* range is one -> 0.1 is reasonable scale */
1523 im->ygrid_scale.gridstep = 0.1;
1524 /* should have at least 5 lines but no more then 15 */
1525 if(range/im->ygrid_scale.gridstep < 5)
1526 im->ygrid_scale.gridstep /= 10;
1527 if(range/im->ygrid_scale.gridstep > 15)
1528 im->ygrid_scale.gridstep *= 10;
1529 if(range/im->ygrid_scale.gridstep > 5) {
1530 im->ygrid_scale.labfact = 1;
1531 if(range/im->ygrid_scale.gridstep > 8)
1532 im->ygrid_scale.labfact = 2;
1533 }
1534 else {
1535 im->ygrid_scale.gridstep /= 5;
1536 im->ygrid_scale.labfact = 5;
1537 }
1538 }
1539 else {
1540 for(i=0;ylab[i].grid > 0;i++){
1541 pixel = im->ysize / (scaledrange / ylab[i].grid);
1542 if (gridind == -1 && pixel > 5) {
1543 gridind = i;
1544 break;
1545 }
1546 }
1548 for(i=0; i<4;i++) {
1549 if (pixel * ylab[gridind].lfac[i] >= 2 * im->text_prop[TEXT_PROP_AXIS].size) {
1550 im->ygrid_scale.labfact = ylab[gridind].lfac[i];
1551 break;
1552 }
1553 }
1555 im->ygrid_scale.gridstep = ylab[gridind].grid * im->magfact;
1556 }
1557 } else {
1558 im->ygrid_scale.gridstep = im->ygridstep;
1559 im->ygrid_scale.labfact = im->ylabfact;
1560 }
1561 return 1;
1562 }
1564 int draw_horizontal_grid(image_desc_t *im)
1565 {
1566 int i;
1567 double scaledstep;
1568 char graph_label[100];
1569 double X0=im->xorigin;
1570 double X1=im->xorigin+im->xsize;
1572 int sgrid = (int)( im->minval / im->ygrid_scale.gridstep - 1);
1573 int egrid = (int)( im->maxval / im->ygrid_scale.gridstep + 1);
1574 scaledstep = im->ygrid_scale.gridstep/im->magfact;
1575 for (i = sgrid; i <= egrid; i++){
1576 double Y0=ytr(im,im->ygrid_scale.gridstep*i);
1577 if ( Y0 >= im->yorigin-im->ysize
1578 && Y0 <= im->yorigin){
1579 if(i % im->ygrid_scale.labfact == 0){
1580 if (i==0 || im->symbol == ' ') {
1581 if(scaledstep < 1){
1582 if(im->extra_flags & ALTYGRID) {
1583 sprintf(graph_label,im->ygrid_scale.labfmt,scaledstep*i);
1584 }
1585 else {
1586 sprintf(graph_label,"%4.1f",scaledstep*i);
1587 }
1588 } else {
1589 sprintf(graph_label,"%4.0f",scaledstep*i);
1590 }
1591 }else {
1592 if(scaledstep < 1){
1593 sprintf(graph_label,"%4.1f %c",scaledstep*i, im->symbol);
1594 } else {
1595 sprintf(graph_label,"%4.0f %c",scaledstep*i, im->symbol);
1596 }
1597 }
1599 gfx_new_text ( im->canvas,
1600 X0-im->text_prop[TEXT_PROP_AXIS].size/1.5, Y0,
1601 im->graph_col[GRC_FONT],
1602 im->text_prop[TEXT_PROP_AXIS].font,
1603 im->text_prop[TEXT_PROP_AXIS].size,
1604 im->tabwidth, 0.0, GFX_H_RIGHT, GFX_V_CENTER,
1605 graph_label );
1606 gfx_new_dashed_line ( im->canvas,
1607 X0-2,Y0,
1608 X1+2,Y0,
1609 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1610 im->grid_dash_on, im->grid_dash_off);
1612 } else if (!(im->extra_flags & NOMINOR)) {
1613 gfx_new_dashed_line ( im->canvas,
1614 X0-1,Y0,
1615 X1+1,Y0,
1616 GRIDWIDTH, im->graph_col[GRC_GRID],
1617 im->grid_dash_on, im->grid_dash_off);
1619 }
1620 }
1621 }
1622 return 1;
1623 }
1625 /* logaritmic horizontal grid */
1626 int
1627 horizontal_log_grid(image_desc_t *im)
1628 {
1629 double pixpex;
1630 int ii,i;
1631 int minoridx=0, majoridx=0;
1632 char graph_label[100];
1633 double X0,X1,Y0;
1634 double value, pixperstep, minstep;
1636 /* find grid spaceing */
1637 pixpex= (double)im->ysize / (log10(im->maxval) - log10(im->minval));
1639 if (isnan(pixpex)) {
1640 return 0;
1641 }
1643 for(i=0;yloglab[i][0] > 0;i++){
1644 minstep = log10(yloglab[i][0]);
1645 for(ii=1;yloglab[i][ii+1] > 0;ii++){
1646 if(yloglab[i][ii+2]==0){
1647 minstep = log10(yloglab[i][ii+1])-log10(yloglab[i][ii]);
1648 break;
1649 }
1650 }
1651 pixperstep = pixpex * minstep;
1652 if(pixperstep > 5){minoridx = i;}
1653 if(pixperstep > 2 * im->text_prop[TEXT_PROP_LEGEND].size){majoridx = i;}
1654 }
1656 X0=im->xorigin;
1657 X1=im->xorigin+im->xsize;
1658 /* paint minor grid */
1659 for (value = pow((double)10, log10(im->minval)
1660 - fmod(log10(im->minval),log10(yloglab[minoridx][0])));
1661 value <= im->maxval;
1662 value *= yloglab[minoridx][0]){
1663 if (value < im->minval) continue;
1664 i=0;
1665 while(yloglab[minoridx][++i] > 0){
1666 Y0 = ytr(im,value * yloglab[minoridx][i]);
1667 if (Y0 <= im->yorigin - im->ysize) break;
1668 gfx_new_dashed_line ( im->canvas,
1669 X0-1,Y0,
1670 X1+1,Y0,
1671 GRIDWIDTH, im->graph_col[GRC_GRID],
1672 im->grid_dash_on, im->grid_dash_off);
1673 }
1674 }
1676 /* paint major grid and labels*/
1677 for (value = pow((double)10, log10(im->minval)
1678 - fmod(log10(im->minval),log10(yloglab[majoridx][0])));
1679 value <= im->maxval;
1680 value *= yloglab[majoridx][0]){
1681 if (value < im->minval) continue;
1682 i=0;
1683 while(yloglab[majoridx][++i] > 0){
1684 Y0 = ytr(im,value * yloglab[majoridx][i]);
1685 if (Y0 <= im->yorigin - im->ysize) break;
1686 gfx_new_dashed_line ( im->canvas,
1687 X0-2,Y0,
1688 X1+2,Y0,
1689 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1690 im->grid_dash_on, im->grid_dash_off);
1692 sprintf(graph_label,"%3.0e",value * yloglab[majoridx][i]);
1693 gfx_new_text ( im->canvas,
1694 X0-im->text_prop[TEXT_PROP_AXIS].size/1.5, Y0,
1695 im->graph_col[GRC_FONT],
1696 im->text_prop[TEXT_PROP_AXIS].font,
1697 im->text_prop[TEXT_PROP_AXIS].size,
1698 im->tabwidth,0.0, GFX_H_RIGHT, GFX_V_CENTER,
1699 graph_label );
1700 }
1701 }
1702 return 1;
1703 }
1706 void
1707 vertical_grid(
1708 image_desc_t *im )
1709 {
1710 int xlab_sel; /* which sort of label and grid ? */
1711 time_t ti, tilab, timajor;
1712 long factor;
1713 char graph_label[100];
1714 double X0,Y0,Y1; /* points for filled graph and more*/
1715 struct tm tm;
1717 /* the type of time grid is determined by finding
1718 the number of seconds per pixel in the graph */
1721 if(im->xlab_user.minsec == -1){
1722 factor=(im->end - im->start)/im->xsize;
1723 xlab_sel=0;
1724 while ( xlab[xlab_sel+1].minsec != -1
1725 && xlab[xlab_sel+1].minsec <= factor){ xlab_sel++; }
1726 im->xlab_user.gridtm = xlab[xlab_sel].gridtm;
1727 im->xlab_user.gridst = xlab[xlab_sel].gridst;
1728 im->xlab_user.mgridtm = xlab[xlab_sel].mgridtm;
1729 im->xlab_user.mgridst = xlab[xlab_sel].mgridst;
1730 im->xlab_user.labtm = xlab[xlab_sel].labtm;
1731 im->xlab_user.labst = xlab[xlab_sel].labst;
1732 im->xlab_user.precis = xlab[xlab_sel].precis;
1733 im->xlab_user.stst = xlab[xlab_sel].stst;
1734 }
1736 /* y coords are the same for every line ... */
1737 Y0 = im->yorigin;
1738 Y1 = im->yorigin-im->ysize;
1741 /* paint the minor grid */
1742 if (!(im->extra_flags & NOMINOR))
1743 {
1744 for(ti = find_first_time(im->start,
1745 im->xlab_user.gridtm,
1746 im->xlab_user.gridst),
1747 timajor = find_first_time(im->start,
1748 im->xlab_user.mgridtm,
1749 im->xlab_user.mgridst);
1750 ti < im->end;
1751 ti = find_next_time(ti,im->xlab_user.gridtm,im->xlab_user.gridst)
1752 ){
1753 /* are we inside the graph ? */
1754 if (ti < im->start || ti > im->end) continue;
1755 while (timajor < ti) {
1756 timajor = find_next_time(timajor,
1757 im->xlab_user.mgridtm, im->xlab_user.mgridst);
1758 }
1759 if (ti == timajor) continue; /* skip as falls on major grid line */
1760 X0 = xtr(im,ti);
1761 gfx_new_dashed_line(im->canvas,X0,Y0+1, X0,Y1-1,GRIDWIDTH,
1762 im->graph_col[GRC_GRID],
1763 im->grid_dash_on, im->grid_dash_off);
1765 }
1766 }
1768 /* paint the major grid */
1769 for(ti = find_first_time(im->start,
1770 im->xlab_user.mgridtm,
1771 im->xlab_user.mgridst);
1772 ti < im->end;
1773 ti = find_next_time(ti,im->xlab_user.mgridtm,im->xlab_user.mgridst)
1774 ){
1775 /* are we inside the graph ? */
1776 if (ti < im->start || ti > im->end) continue;
1777 X0 = xtr(im,ti);
1778 gfx_new_dashed_line(im->canvas,X0,Y0+3, X0,Y1-2,MGRIDWIDTH,
1779 im->graph_col[GRC_MGRID],
1780 im->grid_dash_on, im->grid_dash_off);
1782 }
1783 /* paint the labels below the graph */
1784 for(ti = find_first_time(im->start,
1785 im->xlab_user.labtm,
1786 im->xlab_user.labst);
1787 ti <= im->end;
1788 ti = find_next_time(ti,im->xlab_user.labtm,im->xlab_user.labst)
1789 ){
1790 tilab= ti + im->xlab_user.precis/2; /* correct time for the label */
1791 /* are we inside the graph ? */
1792 if (ti < im->start || ti > im->end) continue;
1794 #if HAVE_STRFTIME
1795 localtime_r(&tilab, &tm);
1796 strftime(graph_label,99,im->xlab_user.stst, &tm);
1797 #else
1798 # error "your libc has no strftime I guess we'll abort the exercise here."
1799 #endif
1800 gfx_new_text ( im->canvas,
1801 xtr(im,tilab), Y0+im->text_prop[TEXT_PROP_AXIS].size/1.5,
1802 im->graph_col[GRC_FONT],
1803 im->text_prop[TEXT_PROP_AXIS].font,
1804 im->text_prop[TEXT_PROP_AXIS].size,
1805 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_TOP,
1806 graph_label );
1808 }
1810 }
1813 void
1814 axis_paint(
1815 image_desc_t *im
1816 )
1817 {
1818 /* draw x and y axis */
1819 gfx_new_line ( im->canvas, im->xorigin+im->xsize,im->yorigin,
1820 im->xorigin+im->xsize,im->yorigin-im->ysize,
1821 GRIDWIDTH, im->graph_col[GRC_GRID]);
1823 gfx_new_line ( im->canvas, im->xorigin,im->yorigin-im->ysize,
1824 im->xorigin+im->xsize,im->yorigin-im->ysize,
1825 GRIDWIDTH, im->graph_col[GRC_GRID]);
1827 gfx_new_line ( im->canvas, im->xorigin-4,im->yorigin,
1828 im->xorigin+im->xsize+4,im->yorigin,
1829 MGRIDWIDTH, im->graph_col[GRC_GRID]);
1831 gfx_new_line ( im->canvas, im->xorigin,im->yorigin+4,
1832 im->xorigin,im->yorigin-im->ysize-4,
1833 MGRIDWIDTH, im->graph_col[GRC_GRID]);
1836 /* arrow for X axis direction */
1837 gfx_new_area ( im->canvas,
1838 im->xorigin+im->xsize+3, im->yorigin-3,
1839 im->xorigin+im->xsize+3, im->yorigin+4,
1840 im->xorigin+im->xsize+8, im->yorigin+0.5, /* LINEOFFSET */
1841 im->graph_col[GRC_ARROW]);
1845 }
1847 void
1848 grid_paint(image_desc_t *im)
1849 {
1850 long i;
1851 int res=0;
1852 double X0,Y0; /* points for filled graph and more*/
1853 gfx_node_t *node;
1855 /* draw 3d border */
1856 node = gfx_new_area (im->canvas, 0,im->yimg,
1857 2,im->yimg-2,
1858 2,2,im->graph_col[GRC_SHADEA]);
1859 gfx_add_point( node , im->ximg - 2, 2 );
1860 gfx_add_point( node , im->ximg, 0 );
1861 gfx_add_point( node , 0,0 );
1862 /* gfx_add_point( node , 0,im->yimg ); */
1864 node = gfx_new_area (im->canvas, 2,im->yimg-2,
1865 im->ximg-2,im->yimg-2,
1866 im->ximg - 2, 2,
1867 im->graph_col[GRC_SHADEB]);
1868 gfx_add_point( node , im->ximg,0);
1869 gfx_add_point( node , im->ximg,im->yimg);
1870 gfx_add_point( node , 0,im->yimg);
1871 /* gfx_add_point( node , 0,im->yimg ); */
1874 if (im->draw_x_grid == 1 )
1875 vertical_grid(im);
1877 if (im->draw_y_grid == 1){
1878 if(im->logarithmic){
1879 res = horizontal_log_grid(im);
1880 } else {
1881 res = draw_horizontal_grid(im);
1882 }
1884 /* dont draw horizontal grid if there is no min and max val */
1885 if (! res ) {
1886 char *nodata = "No Data found";
1887 gfx_new_text(im->canvas,im->ximg/2, (2*im->yorigin-im->ysize) / 2,
1888 im->graph_col[GRC_FONT],
1889 im->text_prop[TEXT_PROP_AXIS].font,
1890 im->text_prop[TEXT_PROP_AXIS].size,
1891 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_CENTER,
1892 nodata );
1893 }
1894 }
1896 /* yaxis description */
1897 /* if (im->canvas->imgformat != IF_PNG) {*/
1898 if (1) {
1899 gfx_new_text( im->canvas,
1900 7, (im->yorigin - im->ysize/2),
1901 im->graph_col[GRC_FONT],
1902 im->text_prop[TEXT_PROP_AXIS].font,
1903 im->text_prop[TEXT_PROP_AXIS].size, im->tabwidth,
1904 RRDGRAPH_YLEGEND_ANGLE,
1905 GFX_H_LEFT, GFX_V_CENTER,
1906 im->ylegend);
1907 } else {
1908 /* horrible hack until we can actually print vertically */
1909 {
1910 int n;
1911 char s[2];
1912 for (n=0;n< (int)strlen(im->ylegend);n++) {
1913 s[0]=im->ylegend[n];
1914 s[1]='\0';
1915 gfx_new_text(im->canvas,7,im->text_prop[TEXT_PROP_AXIS].size*(n+1),
1916 im->graph_col[GRC_FONT],
1917 im->text_prop[TEXT_PROP_AXIS].font,
1918 im->text_prop[TEXT_PROP_AXIS].size, im->tabwidth, 270.0,
1919 GFX_H_CENTER, GFX_V_CENTER,
1920 s);
1921 }
1922 }
1923 }
1925 /* graph title */
1926 gfx_new_text( im->canvas,
1927 im->ximg/2, im->text_prop[TEXT_PROP_TITLE].size,
1928 im->graph_col[GRC_FONT],
1929 im->text_prop[TEXT_PROP_TITLE].font,
1930 im->text_prop[TEXT_PROP_TITLE].size, im->tabwidth, 0.0,
1931 GFX_H_CENTER, GFX_V_CENTER,
1932 im->title);
1934 /* graph labels */
1935 if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
1936 for(i=0;i<im->gdes_c;i++){
1937 if(im->gdes[i].legend[0] =='\0')
1938 continue;
1940 /* im->gdes[i].leg_y is the bottom of the legend */
1941 X0 = im->gdes[i].leg_x;
1942 Y0 = im->gdes[i].leg_y;
1943 /* Box needed? */
1944 if ( im->gdes[i].gf != GF_GPRINT
1945 && im->gdes[i].gf != GF_COMMENT) {
1946 int boxH, boxV;
1948 boxH = gfx_get_text_width(im->canvas, 0,
1949 im->text_prop[TEXT_PROP_AXIS].font,
1950 im->text_prop[TEXT_PROP_AXIS].size,
1951 im->tabwidth,"M", 0) * 1.25;
1952 boxV = boxH;
1954 node = gfx_new_area(im->canvas,
1955 X0,Y0-boxV,
1956 X0,Y0,
1957 X0+boxH,Y0,
1958 im->gdes[i].col);
1959 gfx_add_point ( node, X0+boxH, Y0-boxV );
1960 node = gfx_new_line(im->canvas,
1961 X0,Y0-boxV, X0,Y0,
1962 1,0x000000FF);
1963 gfx_add_point(node,X0+boxH,Y0);
1964 gfx_add_point(node,X0+boxH,Y0-boxV);
1965 gfx_close_path(node);
1966 X0 += boxH / 1.25 * 2;
1967 }
1968 gfx_new_text ( im->canvas, X0, Y0,
1969 im->graph_col[GRC_FONT],
1970 im->text_prop[TEXT_PROP_AXIS].font,
1971 im->text_prop[TEXT_PROP_AXIS].size,
1972 im->tabwidth,0.0, GFX_H_LEFT, GFX_V_BOTTOM,
1973 im->gdes[i].legend );
1974 }
1975 }
1976 }
1979 /*****************************************************
1980 * lazy check make sure we rely need to create this graph
1981 *****************************************************/
1983 int lazy_check(image_desc_t *im){
1984 FILE *fd = NULL;
1985 int size = 1;
1986 struct stat imgstat;
1988 if (im->lazy == 0) return 0; /* no lazy option */
1989 if (stat(im->graphfile,&imgstat) != 0)
1990 return 0; /* can't stat */
1991 /* one pixel in the existing graph is more then what we would
1992 change here ... */
1993 if (time(NULL) - imgstat.st_mtime >
1994 (im->end - im->start) / im->xsize)
1995 return 0;
1996 if ((fd = fopen(im->graphfile,"rb")) == NULL)
1997 return 0; /* the file does not exist */
1998 switch (im->canvas->imgformat) {
1999 case IF_PNG:
2000 size = PngSize(fd,&(im->ximg),&(im->yimg));
2001 break;
2002 default:
2003 size = 1;
2004 }
2005 fclose(fd);
2006 return size;
2007 }
2009 void
2010 pie_part(image_desc_t *im, gfx_color_t color,
2011 double PieCenterX, double PieCenterY, double Radius,
2012 double startangle, double endangle)
2013 {
2014 gfx_node_t *node;
2015 double angle;
2016 double step=M_PI/50; /* Number of iterations for the circle;
2017 ** 10 is definitely too low, more than
2018 ** 50 seems to be overkill
2019 */
2021 /* Strange but true: we have to work clockwise or else
2022 ** anti aliasing nor transparency don't work.
2023 **
2024 ** This test is here to make sure we do it right, also
2025 ** this makes the for...next loop more easy to implement.
2026 ** The return will occur if the user enters a negative number
2027 ** (which shouldn't be done according to the specs) or if the
2028 ** programmers do something wrong (which, as we all know, never
2029 ** happens anyway :)
2030 */
2031 if (endangle<startangle) return;
2033 /* Hidden feature: Radius decreases each full circle */
2034 angle=startangle;
2035 while (angle>=2*M_PI) {
2036 angle -= 2*M_PI;
2037 Radius *= 0.8;
2038 }
2040 node=gfx_new_area(im->canvas,
2041 PieCenterX+sin(startangle)*Radius,
2042 PieCenterY-cos(startangle)*Radius,
2043 PieCenterX,
2044 PieCenterY,
2045 PieCenterX+sin(endangle)*Radius,
2046 PieCenterY-cos(endangle)*Radius,
2047 color);
2048 for (angle=endangle;angle-startangle>=step;angle-=step) {
2049 gfx_add_point(node,
2050 PieCenterX+sin(angle)*Radius,
2051 PieCenterY-cos(angle)*Radius );
2052 }
2053 }
2055 int
2056 graph_size_location(image_desc_t *im, int elements, int piechart )
2057 {
2058 /* The actual size of the image to draw is determined from
2059 ** several sources. The size given on the command line is
2060 ** the graph area but we need more as we have to draw labels
2061 ** and other things outside the graph area
2062 */
2064 /* +-+-------------------------------------------+
2065 ** |l|.................title.....................|
2066 ** |e+--+-------------------------------+--------+
2067 ** |b| b| | |
2068 ** |a| a| | pie |
2069 ** |l| l| main graph area | chart |
2070 ** |.| .| | area |
2071 ** |t| y| | |
2072 ** |r+--+-------------------------------+--------+
2073 ** |e| | x-axis labels | |
2074 ** |v+--+-------------------------------+--------+
2075 ** | |..............legends......................|
2076 ** +-+-------------------------------------------+
2077 */
2078 int Xvertical=0, Yvertical=0,
2079 Xtitle =0, Ytitle =0,
2080 Xylabel =0, Yylabel =0,
2081 Xmain =0, Ymain =0,
2082 Xpie =0, Ypie =0,
2083 Xxlabel =0, Yxlabel =0,
2084 #if 0
2085 Xlegend =0, Ylegend =0,
2086 #endif
2087 Xspacing =10, Yspacing =10;
2089 if (im->extra_flags & ONLY_GRAPH) {
2090 if ( im->ysize > 32 ) {
2091 rrd_set_error("height > 32 is not possible with --only-graph option");
2092 return -1;
2093 }
2094 Xspacing =0;
2095 Yspacing =0;
2096 } else {
2097 if (im->ylegend[0] != '\0') {
2098 Xvertical = im->text_prop[TEXT_PROP_LEGEND].size *2;
2099 Yvertical = im->text_prop[TEXT_PROP_LEGEND].size * (strlen(im->ylegend)+1);
2100 }
2101 }
2103 if (im->title[0] != '\0') {
2104 /* The title is placed "inbetween" two text lines so it
2105 ** automatically has some vertical spacing. The horizontal
2106 ** spacing is added here, on each side.
2107 */
2108 Xtitle = gfx_get_text_width(im->canvas, 0,
2109 im->text_prop[TEXT_PROP_TITLE].font,
2110 im->text_prop[TEXT_PROP_TITLE].size,
2111 im->tabwidth,
2112 im->title, 0) + 2*Xspacing;
2113 Ytitle = im->text_prop[TEXT_PROP_TITLE].size*2;
2114 }
2116 if (elements) {
2117 Xmain=im->xsize;
2118 Ymain=im->ysize;
2119 if (im->draw_x_grid) {
2120 Xxlabel=Xmain;
2121 Yxlabel=im->text_prop[TEXT_PROP_LEGEND].size *2;
2122 }
2123 if (im->draw_y_grid) {
2124 Xylabel=im->text_prop[TEXT_PROP_LEGEND].size *6;
2125 Yylabel=Ymain;
2126 }
2127 }
2129 if (piechart) {
2130 im->piesize=im->xsize<im->ysize?im->xsize:im->ysize;
2131 Xpie=im->piesize;
2132 Ypie=im->piesize;
2133 }
2135 /* Now calculate the total size. Insert some spacing where
2136 desired. im->xorigin and im->yorigin need to correspond
2137 with the lower left corner of the main graph area or, if
2138 this one is not set, the imaginary box surrounding the
2139 pie chart area. */
2141 /* The legend width cannot yet be determined, as a result we
2142 ** have problems adjusting the image to it. For now, we just
2143 ** forget about it at all; the legend will have to fit in the
2144 ** size already allocated.
2145 */
2146 im->ximg = Xmain;
2148 if ( !(im->extra_flags & ONLY_GRAPH) ) {
2149 im->ximg = Xylabel + Xmain + Xpie + Xspacing;
2150 }
2152 if (Xmain) im->ximg += Xspacing;
2153 if (Xpie) im->ximg += Xspacing;
2155 if (im->extra_flags & ONLY_GRAPH) {
2156 im->xorigin = 0;
2157 } else {
2158 im->xorigin = Xspacing + Xylabel;
2159 }
2161 if (Xtitle > im->ximg) im->ximg = Xtitle;
2162 if (Xvertical) {
2163 im->ximg += Xvertical;
2164 im->xorigin += Xvertical;
2165 }
2166 xtr(im,0);
2168 /* The vertical size is interesting... we need to compare
2169 ** the sum of {Ytitle, Ymain, Yxlabel, Ylegend} with Yvertical
2170 ** however we need to know {Ytitle+Ymain+Yxlabel} in order to
2171 ** start even thinking about Ylegend.
2172 **
2173 ** Do it in three portions: First calculate the inner part,
2174 ** then do the legend, then adjust the total height of the img.
2175 */
2177 /* reserve space for main and/or pie */
2179 if (im->extra_flags & ONLY_GRAPH) {
2180 im->yimg = Ymain;
2181 } else {
2182 im->yimg = Ymain + Yxlabel;
2183 }
2185 if (im->yimg < Ypie) im->yimg = Ypie;
2187 if (im->extra_flags & ONLY_GRAPH) {
2188 im->yorigin = im->yimg;
2189 } else {
2190 im->yorigin = im->yimg - Yxlabel;
2191 }
2193 /* reserve space for the title *or* some padding above the graph */
2194 if (Ytitle) {
2195 im->yimg += Ytitle;
2196 im->yorigin += Ytitle;
2197 } else {
2198 im->yimg += Yspacing;
2199 im->yorigin += Yspacing;
2200 }
2201 /* reserve space for padding below the graph */
2202 im->yimg += Yspacing;
2203 ytr(im,DNAN);
2205 /* Determine where to place the legends onto the image.
2206 ** Adjust im->yimg to match the space requirements.
2207 */
2208 if(leg_place(im)==-1)
2209 return -1;
2211 /* last of three steps: check total height of image */
2212 if (im->yimg < Yvertical) im->yimg = Yvertical;
2214 #if 0
2215 if (Xlegend > im->ximg) {
2216 im->ximg = Xlegend;
2217 /* reposition Pie */
2218 }
2219 #endif
2221 /* The pie is placed in the upper right hand corner,
2222 ** just below the title (if any) and with sufficient
2223 ** padding.
2224 */
2225 if (elements) {
2226 im->pie_x = im->ximg - Xspacing - Xpie/2;
2227 im->pie_y = im->yorigin-Ymain+Ypie/2;
2228 } else {
2229 im->pie_x = im->ximg/2;
2230 im->pie_y = im->yorigin-Ypie/2;
2231 }
2233 return 0;
2234 }
2236 /* draw that picture thing ... */
2237 int
2238 graph_paint(image_desc_t *im, char ***calcpr)
2239 {
2240 int i,ii;
2241 int lazy = lazy_check(im);
2242 int piechart = 0;
2243 double PieStart=0.0;
2244 FILE *fo;
2245 gfx_node_t *node;
2247 double areazero = 0.0;
2248 enum gf_en stack_gf = GF_PRINT;
2249 graph_desc_t *lastgdes = NULL;
2251 /* if we are lazy and there is nothing to PRINT ... quit now */
2252 if (lazy && im->prt_c==0) return 0;
2254 /* pull the data from the rrd files ... */
2256 if(data_fetch(im)==-1)
2257 return -1;
2259 /* evaluate VDEF and CDEF operations ... */
2260 if(data_calc(im)==-1)
2261 return -1;
2263 /* check if we need to draw a piechart */
2264 for(i=0;i<im->gdes_c;i++){
2265 if (im->gdes[i].gf == GF_PART) {
2266 piechart=1;
2267 break;
2268 }
2269 }
2271 /* calculate and PRINT and GPRINT definitions. We have to do it at
2272 * this point because it will affect the length of the legends
2273 * if there are no graph elements we stop here ...
2274 * if we are lazy, try to quit ...
2275 */
2276 i=print_calc(im,calcpr);
2277 if(i<0) return -1;
2278 if(((i==0)&&(piechart==0)) || lazy) return 0;
2280 /* If there's only the pie chart to draw, signal this */
2281 if (i==0) piechart=2;
2283 /* get actual drawing data and find min and max values*/
2284 if(data_proc(im)==-1)
2285 return -1;
2287 if(!im->logarithmic){si_unit(im);} /* identify si magnitude Kilo, Mega Giga ? */
2289 if(!im->rigid && ! im->logarithmic)
2290 expand_range(im); /* make sure the upper and lower limit are
2291 sensible values */
2293 if (!calc_horizontal_grid(im))
2294 return -1;
2296 if (im->gridfit)
2297 apply_gridfit(im);
2300 /**************************************************************
2301 *** Calculating sizes and locations became a bit confusing ***
2302 *** so I moved this into a separate function. ***
2303 **************************************************************/
2304 if(graph_size_location(im,i,piechart)==-1)
2305 return -1;
2307 /* the actual graph is created by going through the individual
2308 graph elements and then drawing them */
2310 node=gfx_new_area ( im->canvas,
2311 0, 0,
2312 im->ximg, 0,
2313 im->ximg, im->yimg,
2314 im->graph_col[GRC_BACK]);
2316 gfx_add_point(node,0, im->yimg);
2318 if (piechart != 2) {
2319 node=gfx_new_area ( im->canvas,
2320 im->xorigin, im->yorigin,
2321 im->xorigin + im->xsize, im->yorigin,
2322 im->xorigin + im->xsize, im->yorigin-im->ysize,
2323 im->graph_col[GRC_CANVAS]);
2325 gfx_add_point(node,im->xorigin, im->yorigin - im->ysize);
2327 if (im->minval > 0.0)
2328 areazero = im->minval;
2329 if (im->maxval < 0.0)
2330 areazero = im->maxval;
2331 if( !(im->extra_flags & ONLY_GRAPH) )
2332 axis_paint(im);
2333 }
2335 if (piechart) {
2336 pie_part(im,im->graph_col[GRC_CANVAS],im->pie_x,im->pie_y,im->piesize*0.5,0,2*M_PI);
2337 }
2339 for(i=0;i<im->gdes_c;i++){
2340 switch(im->gdes[i].gf){
2341 case GF_CDEF:
2342 case GF_VDEF:
2343 case GF_DEF:
2344 case GF_PRINT:
2345 case GF_GPRINT:
2346 case GF_COMMENT:
2347 case GF_HRULE:
2348 case GF_VRULE:
2349 case GF_XPORT:
2350 break;
2351 case GF_TICK:
2352 for (ii = 0; ii < im->xsize; ii++)
2353 {
2354 if (!isnan(im->gdes[i].p_data[ii]) &&
2355 im->gdes[i].p_data[ii] > 0.0)
2356 {
2357 /* generate a tick */
2358 gfx_new_line(im->canvas, im -> xorigin + ii,
2359 im -> yorigin - (im -> gdes[i].yrule * im -> ysize),
2360 im -> xorigin + ii,
2361 im -> yorigin,
2362 1.0,
2363 im -> gdes[i].col );
2364 }
2365 }
2366 break;
2367 case GF_LINE:
2368 case GF_AREA:
2369 stack_gf = im->gdes[i].gf;
2370 case GF_STACK:
2371 /* fix data points at oo and -oo */
2372 for(ii=0;ii<im->xsize;ii++){
2373 if (isinf(im->gdes[i].p_data[ii])){
2374 if (im->gdes[i].p_data[ii] > 0) {
2375 im->gdes[i].p_data[ii] = im->maxval ;
2376 } else {
2377 im->gdes[i].p_data[ii] = im->minval ;
2378 }
2380 }
2381 } /* for */
2383 if (im->gdes[i].col != 0x0){
2384 /* GF_LINE and friend */
2385 if(stack_gf == GF_LINE ){
2386 node = NULL;
2387 for(ii=1;ii<im->xsize;ii++){
2388 if ( ! isnan(im->gdes[i].p_data[ii-1])
2389 && ! isnan(im->gdes[i].p_data[ii])){
2390 if (node == NULL){
2391 node = gfx_new_line(im->canvas,
2392 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii-1]),
2393 ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]),
2394 im->gdes[i].linewidth,
2395 im->gdes[i].col);
2396 } else {
2397 gfx_add_point(node,ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]));
2398 }
2399 } else {
2400 node = NULL;
2401 }
2402 }
2403 } else {
2404 int area_start=-1;
2405 node = NULL;
2406 for(ii=1;ii<im->xsize;ii++){
2407 /* open an area */
2408 if ( ! isnan(im->gdes[i].p_data[ii-1])
2409 && ! isnan(im->gdes[i].p_data[ii])){
2410 if (node == NULL){
2411 float ybase = 0.0;
2412 /*
2413 if (im->gdes[i].gf == GF_STACK) {
2414 */
2415 if ( (im->gdes[i].gf == GF_STACK)
2416 || (im->gdes[i].stack) ) {
2418 ybase = ytr(im,lastgdes->p_data[ii-1]);
2419 } else {
2420 ybase = ytr(im,areazero);
2421 }
2422 area_start = ii-1;
2423 node = gfx_new_area(im->canvas,
2424 ii-1+im->xorigin,ybase,
2425 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii-1]),
2426 ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]),
2427 im->gdes[i].col
2428 );
2429 } else {
2430 gfx_add_point(node,ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]));
2431 }
2432 }
2434 if ( node != NULL && (ii+1==im->xsize || isnan(im->gdes[i].p_data[ii]) )){
2435 /* GF_AREA STACK type*/
2436 /*
2437 if (im->gdes[i].gf == GF_STACK ) {
2438 */
2439 if ( (im->gdes[i].gf == GF_STACK)
2440 || (im->gdes[i].stack) ) {
2441 int iii;
2442 for (iii=ii-1;iii>area_start;iii--){
2443 gfx_add_point(node,iii+im->xorigin,ytr(im,lastgdes->p_data[iii]));
2444 }
2445 } else {
2446 gfx_add_point(node,ii+im->xorigin,ytr(im,areazero));
2447 };
2448 node=NULL;
2449 };
2450 }
2451 } /* else GF_LINE */
2452 } /* if color != 0x0 */
2453 /* make sure we do not run into trouble when stacking on NaN */
2454 for(ii=0;ii<im->xsize;ii++){
2455 if (isnan(im->gdes[i].p_data[ii])) {
2456 if (lastgdes && (im->gdes[i].gf == GF_STACK)) {
2457 im->gdes[i].p_data[ii] = lastgdes->p_data[ii];
2458 } else {
2459 im->gdes[i].p_data[ii] = ytr(im,areazero);
2460 }
2461 }
2462 }
2463 lastgdes = &(im->gdes[i]);
2464 break;
2465 case GF_PART:
2466 if(isnan(im->gdes[i].yrule)) /* fetch variable */
2467 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2469 if (finite(im->gdes[i].yrule)) { /* even the fetched var can be NaN */
2470 pie_part(im,im->gdes[i].col,
2471 im->pie_x,im->pie_y,im->piesize*0.4,
2472 M_PI*2.0*PieStart/100.0,
2473 M_PI*2.0*(PieStart+im->gdes[i].yrule)/100.0);
2474 PieStart += im->gdes[i].yrule;
2475 }
2476 break;
2477 } /* switch */
2478 }
2479 if (piechart==2) {
2480 im->draw_x_grid=0;
2481 im->draw_y_grid=0;
2482 }
2483 /* grid_paint also does the text */
2484 if( !(im->extra_flags & ONLY_GRAPH) )
2485 grid_paint(im);
2487 /* the RULES are the last thing to paint ... */
2488 for(i=0;i<im->gdes_c;i++){
2490 switch(im->gdes[i].gf){
2491 case GF_HRULE:
2492 if(isnan(im->gdes[i].yrule)) { /* fetch variable */
2493 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2494 };
2495 if(im->gdes[i].yrule >= im->minval
2496 && im->gdes[i].yrule <= im->maxval)
2497 gfx_new_line(im->canvas,
2498 im->xorigin,ytr(im,im->gdes[i].yrule),
2499 im->xorigin+im->xsize,ytr(im,im->gdes[i].yrule),
2500 1.0,im->gdes[i].col);
2501 break;
2502 case GF_VRULE:
2503 if(im->gdes[i].xrule == 0) { /* fetch variable */
2504 im->gdes[i].xrule = im->gdes[im->gdes[i].vidx].vf.when;
2505 };
2506 if(im->gdes[i].xrule >= im->start
2507 && im->gdes[i].xrule <= im->end)
2508 gfx_new_line(im->canvas,
2509 xtr(im,im->gdes[i].xrule),im->yorigin,
2510 xtr(im,im->gdes[i].xrule),im->yorigin-im->ysize,
2511 1.0,im->gdes[i].col);
2512 break;
2513 default:
2514 break;
2515 }
2516 }
2519 if (strcmp(im->graphfile,"-")==0) {
2520 fo = im->graphhandle ? im->graphhandle : stdout;
2521 #ifdef WIN32
2522 /* Change translation mode for stdout to BINARY */
2523 _setmode( _fileno( fo ), O_BINARY );
2524 #endif
2525 } else {
2526 if ((fo = fopen(im->graphfile,"wb")) == NULL) {
2527 rrd_set_error("Opening '%s' for write: %s",im->graphfile,
2528 rrd_strerror(errno));
2529 return (-1);
2530 }
2531 }
2532 gfx_render (im->canvas,im->ximg,im->yimg,0x0,fo);
2533 if (strcmp(im->graphfile,"-") != 0)
2534 fclose(fo);
2535 return 0;
2536 }
2539 /*****************************************************
2540 * graph stuff
2541 *****************************************************/
2543 int
2544 gdes_alloc(image_desc_t *im){
2546 unsigned long def_step = (im->end-im->start)/im->xsize;
2548 if (im->step > def_step) /* step can be increassed ... no decreassed */
2549 def_step = im->step;
2551 im->gdes_c++;
2553 if ((im->gdes = (graph_desc_t *) rrd_realloc(im->gdes, (im->gdes_c)
2554 * sizeof(graph_desc_t)))==NULL){
2555 rrd_set_error("realloc graph_descs");
2556 return -1;
2557 }
2560 im->gdes[im->gdes_c-1].step=def_step;
2561 im->gdes[im->gdes_c-1].stack=0;
2562 im->gdes[im->gdes_c-1].debug=0;
2563 im->gdes[im->gdes_c-1].start=im->start;
2564 im->gdes[im->gdes_c-1].end=im->end;
2565 im->gdes[im->gdes_c-1].vname[0]='\0';
2566 im->gdes[im->gdes_c-1].data=NULL;
2567 im->gdes[im->gdes_c-1].ds_namv=NULL;
2568 im->gdes[im->gdes_c-1].data_first=0;
2569 im->gdes[im->gdes_c-1].p_data=NULL;
2570 im->gdes[im->gdes_c-1].rpnp=NULL;
2571 im->gdes[im->gdes_c-1].col = 0x0;
2572 im->gdes[im->gdes_c-1].legend[0]='\0';
2573 im->gdes[im->gdes_c-1].rrd[0]='\0';
2574 im->gdes[im->gdes_c-1].ds=-1;
2575 im->gdes[im->gdes_c-1].p_data=NULL;
2576 im->gdes[im->gdes_c-1].yrule=DNAN;
2577 im->gdes[im->gdes_c-1].xrule=0;
2578 return 0;
2579 }
2581 /* copies input untill the first unescaped colon is found
2582 or until input ends. backslashes have to be escaped as well */
2583 int
2584 scan_for_col(char *input, int len, char *output)
2585 {
2586 int inp,outp=0;
2587 for (inp=0;
2588 inp < len &&
2589 input[inp] != ':' &&
2590 input[inp] != '\0';
2591 inp++){
2592 if (input[inp] == '\\' &&
2593 input[inp+1] != '\0' &&
2594 (input[inp+1] == '\\' ||
2595 input[inp+1] == ':')){
2596 output[outp++] = input[++inp];
2597 }
2598 else {
2599 output[outp++] = input[inp];
2600 }
2601 }
2602 output[outp] = '\0';
2603 return inp;
2604 }
2605 /* Some surgery done on this function, it became ridiculously big.
2606 ** Things moved:
2607 ** - initializing now in rrd_graph_init()
2608 ** - options parsing now in rrd_graph_options()
2609 ** - script parsing now in rrd_graph_script()
2610 */
2611 int
2612 rrd_graph(int argc, char **argv, char ***prdata, int *xsize, int *ysize, FILE *stream)
2613 {
2614 image_desc_t im;
2616 rrd_graph_init(&im);
2617 im.graphhandle = stream;
2619 rrd_graph_options(argc,argv,&im);
2620 if (rrd_test_error()) {
2621 im_free(&im);
2622 return -1;
2623 }
2625 if (strlen(argv[optind])>=MAXPATH) {
2626 rrd_set_error("filename (including path) too long");
2627 im_free(&im);
2628 return -1;
2629 }
2630 strncpy(im.graphfile,argv[optind],MAXPATH-1);
2631 im.graphfile[MAXPATH-1]='\0';
2633 rrd_graph_script(argc,argv,&im);
2634 if (rrd_test_error()) {
2635 im_free(&im);
2636 return -1;
2637 }
2639 /* Everything is now read and the actual work can start */
2641 (*prdata)=NULL;
2642 if (graph_paint(&im,prdata)==-1){
2643 im_free(&im);
2644 return -1;
2645 }
2647 /* The image is generated and needs to be output.
2648 ** Also, if needed, print a line with information about the image.
2649 */
2651 *xsize=im.ximg;
2652 *ysize=im.yimg;
2653 if (im.imginfo) {
2654 char *filename;
2655 if (!(*prdata)) {
2656 /* maybe prdata is not allocated yet ... lets do it now */
2657 if ((*prdata = calloc(2,sizeof(char *)))==NULL) {
2658 rrd_set_error("malloc imginfo");
2659 return -1;
2660 };
2661 }
2662 if(((*prdata)[0] = malloc((strlen(im.imginfo)+200+strlen(im.graphfile))*sizeof(char)))
2663 ==NULL){
2664 rrd_set_error("malloc imginfo");
2665 return -1;
2666 }
2667 filename=im.graphfile+strlen(im.graphfile);
2668 while(filename > im.graphfile) {
2669 if (*(filename-1)=='/' || *(filename-1)=='\\' ) break;
2670 filename--;
2671 }
2673 sprintf((*prdata)[0],im.imginfo,filename,(long)(im.canvas->zoom*im.ximg),(long)(im.canvas->zoom*im.yimg));
2674 }
2675 im_free(&im);
2676 return 0;
2677 }
2679 void
2680 rrd_graph_init(image_desc_t *im)
2681 {
2682 unsigned int i;
2684 #ifdef HAVE_TZSET
2685 tzset();
2686 #endif
2687 #ifdef HAVE_SETLOCALE
2688 setlocale(LC_TIME,"");
2689 #endif
2691 im->xlab_user.minsec = -1;
2692 im->ximg=0;
2693 im->yimg=0;
2694 im->xsize = 400;
2695 im->ysize = 100;
2696 im->step = 0;
2697 im->ylegend[0] = '\0';
2698 im->title[0] = '\0';
2699 im->minval = DNAN;
2700 im->maxval = DNAN;
2701 im->unitsexponent= 9999;
2702 im->extra_flags= 0;
2703 im->rigid = 0;
2704 im->gridfit = 1;
2705 im->imginfo = NULL;
2706 im->lazy = 0;
2707 im->logarithmic = 0;
2708 im->ygridstep = DNAN;
2709 im->draw_x_grid = 1;
2710 im->draw_y_grid = 1;
2711 im->base = 1000;
2712 im->prt_c = 0;
2713 im->gdes_c = 0;
2714 im->gdes = NULL;
2715 im->canvas = gfx_new_canvas();
2716 im->grid_dash_on = 1;
2717 im->grid_dash_off = 1;
2719 for(i=0;i<DIM(graph_col);i++)
2720 im->graph_col[i]=graph_col[i];
2721 #ifdef WIN32
2722 {
2723 char *windir;
2724 windir = getenv("windir");
2725 /* %windir% is something like D:\windows or C:\winnt */
2726 if (windir != NULL) {
2727 strcpy(rrd_win_default_font,windir);
2728 strcat(rrd_win_default_font,"\\fonts\\cour.ttf");
2729 for(i=0;i<DIM(text_prop);i++)
2730 text_prop[i].font = rrd_win_default_font;
2731 }
2732 }
2733 #endif
2734 for(i=0;i<DIM(text_prop);i++){
2735 im->text_prop[i].size = text_prop[i].size;
2736 im->text_prop[i].font = text_prop[i].font;
2737 }
2738 }
2740 void
2741 rrd_graph_options(int argc, char *argv[],image_desc_t *im)
2742 {
2743 int stroff;
2744 char *parsetime_error = NULL;
2745 char scan_gtm[12],scan_mtm[12],scan_ltm[12],col_nam[12];
2746 time_t start_tmp=0,end_tmp=0;
2747 long long_tmp;
2748 struct rrd_time_value start_tv, end_tv;
2749 gfx_color_t color;
2751 parsetime("end-24h", &start_tv);
2752 parsetime("now", &end_tv);
2754 while (1){
2755 static struct option long_options[] =
2756 {
2757 {"start", required_argument, 0, 's'},
2758 {"end", required_argument, 0, 'e'},
2759 {"x-grid", required_argument, 0, 'x'},
2760 {"y-grid", required_argument, 0, 'y'},
2761 {"vertical-label",required_argument,0,'v'},
2762 {"width", required_argument, 0, 'w'},
2763 {"height", required_argument, 0, 'h'},
2764 {"interlaced", no_argument, 0, 'i'},
2765 {"upper-limit",required_argument, 0, 'u'},
2766 {"lower-limit",required_argument, 0, 'l'},
2767 {"rigid", no_argument, 0, 'r'},
2768 {"base", required_argument, 0, 'b'},
2769 {"logarithmic",no_argument, 0, 'o'},
2770 {"color", required_argument, 0, 'c'},
2771 {"font", required_argument, 0, 'n'},
2772 {"title", required_argument, 0, 't'},
2773 {"imginfo", required_argument, 0, 'f'},
2774 {"imgformat", required_argument, 0, 'a'},
2775 {"lazy", no_argument, 0, 'z'},
2776 {"zoom", required_argument, 0, 'm'},
2777 {"no-legend", no_argument, 0, 'g'},
2778 {"only-graph", no_argument, 0, 'j'},
2779 {"alt-y-grid", no_argument, 0, 'Y'},
2780 {"no-minor", no_argument, 0, 'I'},
2781 {"alt-autoscale", no_argument, 0, 'A'},
2782 {"alt-autoscale-max", no_argument, 0, 'M'},
2783 {"units-exponent",required_argument, 0, 'X'},
2784 {"step", required_argument, 0, 'S'},
2785 {"no-gridfit", no_argument, 0, 'N'},
2786 {0,0,0,0}};
2787 int option_index = 0;
2788 int opt;
2791 opt = getopt_long(argc, argv,
2792 "s:e:x:y:v:w:h:iu:l:rb:oc:n:m:t:f:a:I:zgjYAMX:S:N",
2793 long_options, &option_index);
2795 if (opt == EOF)
2796 break;
2798 switch(opt) {
2799 case 'I':
2800 im->extra_flags |= NOMINOR;
2801 break;
2802 case 'Y':
2803 im->extra_flags |= ALTYGRID;
2804 break;
2805 case 'A':
2806 im->extra_flags |= ALTAUTOSCALE;
2807 break;
2808 case 'M':
2809 im->extra_flags |= ALTAUTOSCALE_MAX;
2810 break;
2811 case 'j':
2812 im->extra_flags |= ONLY_GRAPH;
2813 break;
2814 case 'g':
2815 im->extra_flags |= NOLEGEND;
2816 break;
2817 case 'X':
2818 im->unitsexponent = atoi(optarg);
2819 break;
2820 case 'S':
2821 im->step = atoi(optarg);
2822 break;
2823 case 262:
2824 im->gridfit = 0;
2825 break;
2826 case 's':
2827 if ((parsetime_error = parsetime(optarg, &start_tv))) {
2828 rrd_set_error( "start time: %s", parsetime_error );
2829 return;
2830 }
2831 break;
2832 case 'e':
2833 if ((parsetime_error = parsetime(optarg, &end_tv))) {
2834 rrd_set_error( "end time: %s", parsetime_error );
2835 return;
2836 }
2837 break;
2838 case 'x':
2839 if(strcmp(optarg,"none") == 0){
2840 im->draw_x_grid=0;
2841 break;
2842 };
2844 if(sscanf(optarg,
2845 "%10[A-Z]:%ld:%10[A-Z]:%ld:%10[A-Z]:%ld:%ld:%n",
2846 scan_gtm,
2847 &im->xlab_user.gridst,
2848 scan_mtm,
2849 &im->xlab_user.mgridst,
2850 scan_ltm,
2851 &im->xlab_user.labst,
2852 &im->xlab_user.precis,
2853 &stroff) == 7 && stroff != 0){
2854 strncpy(im->xlab_form, optarg+stroff, sizeof(im->xlab_form) - 1);
2855 if((int)(im->xlab_user.gridtm = tmt_conv(scan_gtm)) == -1){
2856 rrd_set_error("unknown keyword %s",scan_gtm);
2857 return;
2858 } else if ((int)(im->xlab_user.mgridtm = tmt_conv(scan_mtm)) == -1){
2859 rrd_set_error("unknown keyword %s",scan_mtm);
2860 return;
2861 } else if ((int)(im->xlab_user.labtm = tmt_conv(scan_ltm)) == -1){
2862 rrd_set_error("unknown keyword %s",scan_ltm);
2863 return;
2864 }
2865 im->xlab_user.minsec = 1;
2866 im->xlab_user.stst = im->xlab_form;
2867 } else {
2868 rrd_set_error("invalid x-grid format");
2869 return;
2870 }
2871 break;
2872 case 'y':
2874 if(strcmp(optarg,"none") == 0){
2875 im->draw_y_grid=0;
2876 break;
2877 };
2879 if(sscanf(optarg,
2880 "%lf:%d",
2881 &im->ygridstep,
2882 &im->ylabfact) == 2) {
2883 if(im->ygridstep<=0){
2884 rrd_set_error("grid step must be > 0");
2885 return;
2886 } else if (im->ylabfact < 1){
2887 rrd_set_error("label factor must be > 0");
2888 return;
2889 }
2890 } else {
2891 rrd_set_error("invalid y-grid format");
2892 return;
2893 }
2894 break;
2895 case 'v':
2896 strncpy(im->ylegend,optarg,150);
2897 im->ylegend[150]='\0';
2898 break;
2899 case 'u':
2900 im->maxval = atof(optarg);
2901 break;
2902 case 'l':
2903 im->minval = atof(optarg);
2904 break;
2905 case 'b':
2906 im->base = atol(optarg);
2907 if(im->base != 1024 && im->base != 1000 ){
2908 rrd_set_error("the only sensible value for base apart from 1000 is 1024");
2909 return;
2910 }
2911 break;
2912 case 'w':
2913 long_tmp = atol(optarg);
2914 if (long_tmp < 10) {
2915 rrd_set_error("width below 10 pixels");
2916 return;
2917 }
2918 im->xsize = long_tmp;
2919 break;
2920 case 'h':
2921 long_tmp = atol(optarg);
2922 if (long_tmp < 10) {
2923 rrd_set_error("height below 10 pixels");
2924 return;
2925 }
2926 im->ysize = long_tmp;
2927 break;
2928 case 'i':
2929 im->canvas->interlaced = 1;
2930 break;
2931 case 'r':
2932 im->rigid = 1;
2933 break;
2934 case 'f':
2935 im->imginfo = optarg;
2936 break;
2937 case 'a':
2938 if((int)(im->canvas->imgformat = if_conv(optarg)) == -1) {
2939 rrd_set_error("unsupported graphics format '%s'",optarg);
2940 return;
2941 }
2942 break;
2943 case 'z':
2944 im->lazy = 1;
2945 break;
2946 case 'o':
2947 im->logarithmic = 1;
2948 if (isnan(im->minval))
2949 im->minval=1;
2950 break;
2951 case 'c':
2952 if(sscanf(optarg,
2953 "%10[A-Z]#%8lx",
2954 col_nam,&color) == 2){
2955 int ci;
2956 if((ci=grc_conv(col_nam)) != -1){
2957 im->graph_col[ci]=color;
2958 } else {
2959 rrd_set_error("invalid color name '%s'",col_nam);
2960 }
2961 } else {
2962 rrd_set_error("invalid color def format");
2963 return;
2964 }
2965 break;
2966 case 'n':{
2967 /* originally this used char *prop = "" and
2968 ** char *font = "dummy" however this results
2969 ** in a SEG fault, at least on RH7.1
2970 **
2971 ** The current implementation isn't proper
2972 ** either, font is never freed and prop uses
2973 ** a fixed width string
2974 */
2975 char prop[100];
2976 double size = 1;
2977 char *font;
2979 font=malloc(255);
2980 if(sscanf(optarg,
2981 "%10[A-Z]:%lf:%s",
2982 prop,&size,font) == 3){
2983 int sindex;
2984 if((sindex=text_prop_conv(prop)) != -1){
2985 im->text_prop[sindex].size=size;
2986 im->text_prop[sindex].font=font;
2987 if (sindex==0) { /* the default */
2988 im->text_prop[TEXT_PROP_TITLE].size=size;
2989 im->text_prop[TEXT_PROP_TITLE].font=font;
2990 im->text_prop[TEXT_PROP_AXIS].size=size;
2991 im->text_prop[TEXT_PROP_AXIS].font=font;
2992 im->text_prop[TEXT_PROP_UNIT].size=size;
2993 im->text_prop[TEXT_PROP_UNIT].font=font;
2994 im->text_prop[TEXT_PROP_LEGEND].size=size;
2995 im->text_prop[TEXT_PROP_LEGEND].font=font;
2996 }
2997 } else {
2998 rrd_set_error("invalid fonttag '%s'",prop);
2999 return;
3000 }
3001 } else {
3002 rrd_set_error("invalid text property format");
3003 return;
3004 }
3005 break;
3006 }
3007 case 'm':
3008 im->canvas->zoom = atof(optarg);
3009 if (im->canvas->zoom <= 0.0) {
3010 rrd_set_error("zoom factor must be > 0");
3011 return;
3012 }
3013 break;
3014 case 't':
3015 strncpy(im->title,optarg,150);
3016 im->title[150]='\0';
3017 break;
3019 case '?':
3020 if (optopt != 0)
3021 rrd_set_error("unknown option '%c'", optopt);
3022 else
3023 rrd_set_error("unknown option '%s'",argv[optind-1]);
3024 return;
3025 }
3026 }
3028 if (optind >= argc) {
3029 rrd_set_error("missing filename");
3030 return;
3031 }
3033 if (im->logarithmic == 1 && (im->minval <= 0 || isnan(im->minval))){
3034 rrd_set_error("for a logarithmic yaxis you must specify a lower-limit > 0");
3035 return;
3036 }
3038 if (proc_start_end(&start_tv,&end_tv,&start_tmp,&end_tmp) == -1){
3039 /* error string is set in parsetime.c */
3040 return;
3041 }
3043 if (start_tmp < 3600*24*365*10){
3044 rrd_set_error("the first entry to fetch should be after 1980 (%ld)",start_tmp);
3045 return;
3046 }
3048 if (end_tmp < start_tmp) {
3049 rrd_set_error("start (%ld) should be less than end (%ld)",
3050 start_tmp, end_tmp);
3051 return;
3052 }
3054 im->start = start_tmp;
3055 im->end = end_tmp;
3056 }
3058 int
3059 rrd_graph_check_vname(image_desc_t *im, char *varname, char *err)
3060 {
3061 if ((im->gdes[im->gdes_c-1].vidx=find_var(im,varname))==-1) {
3062 rrd_set_error("Unknown variable '%s' in %s",varname,err);
3063 return -1;
3064 }
3065 return 0;
3066 }
3067 int
3068 rrd_graph_color(image_desc_t *im, char *var, char *err, int optional)
3069 {
3070 char *color;
3071 graph_desc_t *gdp=&im->gdes[im->gdes_c-1];
3073 color=strstr(var,"#");
3074 if (color==NULL) {
3075 if (optional==0) {
3076 rrd_set_error("Found no color in %s",err);
3077 return 0;
3078 }
3079 return 0;
3080 } else {
3081 int n=0;
3082 char *rest;
3083 gfx_color_t col;
3085 rest=strstr(color,":");
3086 if (rest!=NULL)
3087 n=rest-color;
3088 else
3089 n=strlen(color);
3091 switch (n) {
3092 case 7:
3093 sscanf(color,"#%6lx%n",&col,&n);
3094 col = (col << 8) + 0xff /* shift left by 8 */;
3095 if (n!=7) rrd_set_error("Color problem in %s",err);
3096 break;
3097 case 9:
3098 sscanf(color,"#%8lx%n",&col,&n);
3099 if (n==9) break;
3100 default:
3101 rrd_set_error("Color problem in %s",err);
3102 }
3103 if (rrd_test_error()) return 0;
3104 gdp->col = col;
3105 return n;
3106 }
3107 }
3108 int
3109 rrd_graph_legend(graph_desc_t *gdp, char *line)
3110 {
3111 int i;
3113 i=scan_for_col(line,FMT_LEG_LEN,gdp->legend);
3115 return (strlen(&line[i])==0);
3116 }
3119 int bad_format(char *fmt) {
3120 char *ptr;
3121 int n=0;
3122 ptr = fmt;
3123 while (*ptr != '\0')
3124 if (*ptr++ == '%') {
3126 /* line cannot end with percent char */
3127 if (*ptr == '\0') return 1;
3129 /* '%s', '%S' and '%%' are allowed */
3130 if (*ptr == 's' || *ptr == 'S' || *ptr == '%') ptr++;
3132 /* or else '% 6.2lf' and such are allowed */
3133 else {
3135 /* optional padding character */
3136 if (*ptr == ' ' || *ptr == '+' || *ptr == '-') ptr++;
3138 /* This should take care of 'm.n' with all three optional */
3139 while (*ptr >= '0' && *ptr <= '9') ptr++;
3140 if (*ptr == '.') ptr++;
3141 while (*ptr >= '0' && *ptr <= '9') ptr++;
3143 /* Either 'le', 'lf' or 'lg' must follow here */
3144 if (*ptr++ != 'l') return 1;
3145 if (*ptr == 'e' || *ptr == 'f' || *ptr == 'g') ptr++;
3146 else return 1;
3147 n++;
3148 }
3149 }
3151 return (n!=1);
3152 }
3155 int
3156 vdef_parse(gdes,str)
3157 struct graph_desc_t *gdes;
3158 char *str;
3159 {
3160 /* A VDEF currently is either "func" or "param,func"
3161 * so the parsing is rather simple. Change if needed.
3162 */
3163 double param;
3164 char func[30];
3165 int n;
3167 n=0;
3168 sscanf(str,"%le,%29[A-Z]%n",¶m,func,&n);
3169 if (n== (int)strlen(str)) { /* matched */
3170 ;
3171 } else {
3172 n=0;
3173 sscanf(str,"%29[A-Z]%n",func,&n);
3174 if (n== (int)strlen(str)) { /* matched */
3175 param=DNAN;
3176 } else {
3177 rrd_set_error("Unknown function string '%s' in VDEF '%s'"
3178 ,str
3179 ,gdes->vname
3180 );
3181 return -1;
3182 }
3183 }
3184 if (!strcmp("PERCENT",func)) gdes->vf.op = VDEF_PERCENT;
3185 else if (!strcmp("MAXIMUM",func)) gdes->vf.op = VDEF_MAXIMUM;
3186 else if (!strcmp("AVERAGE",func)) gdes->vf.op = VDEF_AVERAGE;
3187 else if (!strcmp("MINIMUM",func)) gdes->vf.op = VDEF_MINIMUM;
3188 else if (!strcmp("TOTAL", func)) gdes->vf.op = VDEF_TOTAL;
3189 else if (!strcmp("FIRST", func)) gdes->vf.op = VDEF_FIRST;
3190 else if (!strcmp("LAST", func)) gdes->vf.op = VDEF_LAST;
3191 else {
3192 rrd_set_error("Unknown function '%s' in VDEF '%s'\n"
3193 ,func
3194 ,gdes->vname
3195 );
3196 return -1;
3197 };
3199 switch (gdes->vf.op) {
3200 case VDEF_PERCENT:
3201 if (isnan(param)) { /* no parameter given */
3202 rrd_set_error("Function '%s' needs parameter in VDEF '%s'\n"
3203 ,func
3204 ,gdes->vname
3205 );
3206 return -1;
3207 };
3208 if (param>=0.0 && param<=100.0) {
3209 gdes->vf.param = param;
3210 gdes->vf.val = DNAN; /* undefined */
3211 gdes->vf.when = 0; /* undefined */
3212 } else {
3213 rrd_set_error("Parameter '%f' out of range in VDEF '%s'\n"
3214 ,param
3215 ,gdes->vname
3216 );
3217 return -1;
3218 };
3219 break;
3220 case VDEF_MAXIMUM:
3221 case VDEF_AVERAGE:
3222 case VDEF_MINIMUM:
3223 case VDEF_TOTAL:
3224 case VDEF_FIRST:
3225 case VDEF_LAST:
3226 if (isnan(param)) {
3227 gdes->vf.param = DNAN;
3228 gdes->vf.val = DNAN;
3229 gdes->vf.when = 0;
3230 } else {
3231 rrd_set_error("Function '%s' needs no parameter in VDEF '%s'\n"
3232 ,func
3233 ,gdes->vname
3234 );
3235 return -1;
3236 };
3237 break;
3238 };
3239 return 0;
3240 }
3243 int
3244 vdef_calc(im,gdi)
3245 image_desc_t *im;
3246 int gdi;
3247 {
3248 graph_desc_t *src,*dst;
3249 rrd_value_t *data;
3250 long step,steps;
3252 dst = &im->gdes[gdi];
3253 src = &im->gdes[dst->vidx];
3254 data = src->data + src->ds;
3255 steps = (src->end - src->start) / src->step;
3257 #if 0
3258 printf("DEBUG: start == %lu, end == %lu, %lu steps\n"
3259 ,src->start
3260 ,src->end
3261 ,steps
3262 );
3263 #endif
3265 switch (dst->vf.op) {
3266 case VDEF_PERCENT: {
3267 rrd_value_t * array;
3268 int field;
3271 if ((array = malloc(steps*sizeof(double)))==NULL) {
3272 rrd_set_error("malloc VDEV_PERCENT");
3273 return -1;
3274 }
3275 for (step=0;step < steps; step++) {
3276 array[step]=data[step*src->ds_cnt];
3277 }
3278 qsort(array,step,sizeof(double),vdef_percent_compar);
3280 field = (steps-1)*dst->vf.param/100;
3281 dst->vf.val = array[field];
3282 dst->vf.when = 0; /* no time component */
3283 free(array);
3284 #if 0
3285 for(step=0;step<steps;step++)
3286 printf("DEBUG: %3li:%10.2f %c\n",step,array[step],step==field?'*':' ');
3287 #endif
3288 }
3289 break;
3290 case VDEF_MAXIMUM:
3291 step=0;
3292 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3293 if (step == steps) {
3294 dst->vf.val = DNAN;
3295 dst->vf.when = 0;
3296 } else {
3297 dst->vf.val = data[step*src->ds_cnt];
3298 dst->vf.when = src->start + (step+1)*src->step;
3299 }
3300 while (step != steps) {
3301 if (finite(data[step*src->ds_cnt])) {
3302 if (data[step*src->ds_cnt] > dst->vf.val) {
3303 dst->vf.val = data[step*src->ds_cnt];
3304 dst->vf.when = src->start + (step+1)*src->step;
3305 }
3306 }
3307 step++;
3308 }
3309 break;
3310 case VDEF_TOTAL:
3311 case VDEF_AVERAGE: {
3312 int cnt=0;
3313 double sum=0.0;
3314 for (step=0;step<steps;step++) {
3315 if (finite(data[step*src->ds_cnt])) {
3316 sum += data[step*src->ds_cnt];
3317 cnt ++;
3318 };
3319 }
3320 if (cnt) {
3321 if (dst->vf.op == VDEF_TOTAL) {
3322 dst->vf.val = sum*src->step;
3323 dst->vf.when = cnt*src->step; /* not really "when" */
3324 } else {
3325 dst->vf.val = sum/cnt;
3326 dst->vf.when = 0; /* no time component */
3327 };
3328 } else {
3329 dst->vf.val = DNAN;
3330 dst->vf.when = 0;
3331 }
3332 }
3333 break;
3334 case VDEF_MINIMUM:
3335 step=0;
3336 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3337 if (step == steps) {
3338 dst->vf.val = DNAN;
3339 dst->vf.when = 0;
3340 } else {
3341 dst->vf.val = data[step*src->ds_cnt];
3342 dst->vf.when = src->start + (step+1)*src->step;
3343 }
3344 while (step != steps) {
3345 if (finite(data[step*src->ds_cnt])) {
3346 if (data[step*src->ds_cnt] < dst->vf.val) {
3347 dst->vf.val = data[step*src->ds_cnt];
3348 dst->vf.when = src->start + (step+1)*src->step;
3349 }
3350 }
3351 step++;
3352 }
3353 break;
3354 case VDEF_FIRST:
3355 /* The time value returned here is one step before the
3356 * actual time value. This is the start of the first
3357 * non-NaN interval.
3358 */
3359 step=0;
3360 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3361 if (step == steps) { /* all entries were NaN */
3362 dst->vf.val = DNAN;
3363 dst->vf.when = 0;
3364 } else {
3365 dst->vf.val = data[step*src->ds_cnt];
3366 dst->vf.when = src->start + step*src->step;
3367 }
3368 break;
3369 case VDEF_LAST:
3370 /* The time value returned here is the
3371 * actual time value. This is the end of the last
3372 * non-NaN interval.
3373 */
3374 step=steps-1;
3375 while (step >= 0 && isnan(data[step*src->ds_cnt])) step--;
3376 if (step < 0) { /* all entries were NaN */
3377 dst->vf.val = DNAN;
3378 dst->vf.when = 0;
3379 } else {
3380 dst->vf.val = data[step*src->ds_cnt];
3381 dst->vf.when = src->start + (step+1)*src->step;
3382 }
3383 break;
3384 }
3385 return 0;
3386 }
3388 /* NaN < -INF < finite_values < INF */
3389 int
3390 vdef_percent_compar(a,b)
3391 const void *a,*b;
3392 {
3393 /* Equality is not returned; this doesn't hurt except
3394 * (maybe) for a little performance.
3395 */
3397 /* First catch NaN values. They are smallest */
3398 if (isnan( *(double *)a )) return -1;
3399 if (isnan( *(double *)b )) return 1;
3401 /* NaN doesn't reach this part so INF and -INF are extremes.
3402 * The sign from isinf() is compatible with the sign we return
3403 */
3404 if (isinf( *(double *)a )) return isinf( *(double *)a );
3405 if (isinf( *(double *)b )) return isinf( *(double *)b );
3407 /* If we reach this, both values must be finite */
3408 if ( *(double *)a < *(double *)b ) return -1; else return 1;
3409 }