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)
191 conv_if(SHIFT,GF_SHIFT)
193 return (-1);
194 }
196 enum gfx_if_en if_conv(char *string){
198 conv_if(PNG,IF_PNG)
199 conv_if(SVG,IF_SVG)
200 conv_if(EPS,IF_EPS)
201 conv_if(PDF,IF_PDF)
203 return (-1);
204 }
206 enum tmt_en tmt_conv(char *string){
208 conv_if(SECOND,TMT_SECOND)
209 conv_if(MINUTE,TMT_MINUTE)
210 conv_if(HOUR,TMT_HOUR)
211 conv_if(DAY,TMT_DAY)
212 conv_if(WEEK,TMT_WEEK)
213 conv_if(MONTH,TMT_MONTH)
214 conv_if(YEAR,TMT_YEAR)
215 return (-1);
216 }
218 enum grc_en grc_conv(char *string){
220 conv_if(BACK,GRC_BACK)
221 conv_if(CANVAS,GRC_CANVAS)
222 conv_if(SHADEA,GRC_SHADEA)
223 conv_if(SHADEB,GRC_SHADEB)
224 conv_if(GRID,GRC_GRID)
225 conv_if(MGRID,GRC_MGRID)
226 conv_if(FONT,GRC_FONT)
227 conv_if(FRAME,GRC_FRAME)
228 conv_if(ARROW,GRC_ARROW)
230 return -1;
231 }
233 enum text_prop_en text_prop_conv(char *string){
235 conv_if(DEFAULT,TEXT_PROP_DEFAULT)
236 conv_if(TITLE,TEXT_PROP_TITLE)
237 conv_if(AXIS,TEXT_PROP_AXIS)
238 conv_if(UNIT,TEXT_PROP_UNIT)
239 conv_if(LEGEND,TEXT_PROP_LEGEND)
240 return -1;
241 }
244 #undef conv_if
246 int
247 im_free(image_desc_t *im)
248 {
249 unsigned long i,ii;
251 if (im == NULL) return 0;
252 for(i=0;i<(unsigned)im->gdes_c;i++){
253 if (im->gdes[i].data_first){
254 /* careful here, because a single pointer can occur several times */
255 free (im->gdes[i].data);
256 if (im->gdes[i].ds_namv){
257 for (ii=0;ii<im->gdes[i].ds_cnt;ii++)
258 free(im->gdes[i].ds_namv[ii]);
259 free(im->gdes[i].ds_namv);
260 }
261 }
262 free (im->gdes[i].p_data);
263 free (im->gdes[i].rpnp);
264 }
265 free(im->gdes);
266 gfx_destroy(im->canvas);
267 return 0;
268 }
270 /* find SI magnitude symbol for the given number*/
271 void
272 auto_scale(
273 image_desc_t *im, /* image description */
274 double *value,
275 char **symb_ptr,
276 double *magfact
277 )
278 {
280 char *symbol[] = {"a", /* 10e-18 Atto */
281 "f", /* 10e-15 Femto */
282 "p", /* 10e-12 Pico */
283 "n", /* 10e-9 Nano */
284 "u", /* 10e-6 Micro */
285 "m", /* 10e-3 Milli */
286 " ", /* Base */
287 "k", /* 10e3 Kilo */
288 "M", /* 10e6 Mega */
289 "G", /* 10e9 Giga */
290 "T", /* 10e12 Tera */
291 "P", /* 10e15 Peta */
292 "E"};/* 10e18 Exa */
294 int symbcenter = 6;
295 int sindex;
297 if (*value == 0.0 || isnan(*value) ) {
298 sindex = 0;
299 *magfact = 1.0;
300 } else {
301 sindex = floor(log(fabs(*value))/log((double)im->base));
302 *magfact = pow((double)im->base, (double)sindex);
303 (*value) /= (*magfact);
304 }
305 if ( sindex <= symbcenter && sindex >= -symbcenter) {
306 (*symb_ptr) = symbol[sindex+symbcenter];
307 }
308 else {
309 (*symb_ptr) = "?";
310 }
311 }
314 /* find SI magnitude symbol for the numbers on the y-axis*/
315 void
316 si_unit(
317 image_desc_t *im /* image description */
318 )
319 {
321 char symbol[] = {'a', /* 10e-18 Atto */
322 'f', /* 10e-15 Femto */
323 'p', /* 10e-12 Pico */
324 'n', /* 10e-9 Nano */
325 'u', /* 10e-6 Micro */
326 'm', /* 10e-3 Milli */
327 ' ', /* Base */
328 'k', /* 10e3 Kilo */
329 'M', /* 10e6 Mega */
330 'G', /* 10e9 Giga */
331 'T', /* 10e12 Tera */
332 'P', /* 10e15 Peta */
333 'E'};/* 10e18 Exa */
335 int symbcenter = 6;
336 double digits;
338 if (im->unitsexponent != 9999) {
339 /* unitsexponent = 9, 6, 3, 0, -3, -6, -9, etc */
340 digits = floor(im->unitsexponent / 3);
341 } else {
342 digits = floor( log( max( fabs(im->minval),fabs(im->maxval)))/log((double)im->base));
343 }
344 im->magfact = pow((double)im->base , digits);
346 #ifdef DEBUG
347 printf("digits %6.3f im->magfact %6.3f\n",digits,im->magfact);
348 #endif
350 if ( ((digits+symbcenter) < sizeof(symbol)) &&
351 ((digits+symbcenter) >= 0) )
352 im->symbol = symbol[(int)digits+symbcenter];
353 else
354 im->symbol = ' ';
355 }
357 /* move min and max values around to become sensible */
359 void
360 expand_range(image_desc_t *im)
361 {
362 double sensiblevalues[] ={1000.0,900.0,800.0,750.0,700.0,
363 600.0,500.0,400.0,300.0,250.0,
364 200.0,125.0,100.0,90.0,80.0,
365 75.0,70.0,60.0,50.0,40.0,30.0,
366 25.0,20.0,10.0,9.0,8.0,
367 7.0,6.0,5.0,4.0,3.5,3.0,
368 2.5,2.0,1.8,1.5,1.2,1.0,
369 0.8,0.7,0.6,0.5,0.4,0.3,0.2,0.1,0.0,-1};
371 double scaled_min,scaled_max;
372 double adj;
373 int i;
377 #ifdef DEBUG
378 printf("Min: %6.2f Max: %6.2f MagFactor: %6.2f\n",
379 im->minval,im->maxval,im->magfact);
380 #endif
382 if (isnan(im->ygridstep)){
383 if(im->extra_flags & ALTAUTOSCALE) {
384 /* measure the amplitude of the function. Make sure that
385 graph boundaries are slightly higher then max/min vals
386 so we can see amplitude on the graph */
387 double delt, fact;
389 delt = im->maxval - im->minval;
390 adj = delt * 0.1;
391 fact = 2.0 * pow(10.0,
392 floor(log10(max(fabs(im->minval), fabs(im->maxval)))) - 2);
393 if (delt < fact) {
394 adj = (fact - delt) * 0.55;
395 #ifdef DEBUG
396 printf("Min: %6.2f Max: %6.2f delt: %6.2f fact: %6.2f adj: %6.2f\n", im->minval, im->maxval, delt, fact, adj);
397 #endif
398 }
399 im->minval -= adj;
400 im->maxval += adj;
401 }
402 else if(im->extra_flags & ALTAUTOSCALE_MAX) {
403 /* measure the amplitude of the function. Make sure that
404 graph boundaries are slightly higher than max vals
405 so we can see amplitude on the graph */
406 adj = (im->maxval - im->minval) * 0.1;
407 im->maxval += adj;
408 }
409 else {
410 scaled_min = im->minval / im->magfact;
411 scaled_max = im->maxval / im->magfact;
413 for (i=1; sensiblevalues[i] > 0; i++){
414 if (sensiblevalues[i-1]>=scaled_min &&
415 sensiblevalues[i]<=scaled_min)
416 im->minval = sensiblevalues[i]*(im->magfact);
418 if (-sensiblevalues[i-1]<=scaled_min &&
419 -sensiblevalues[i]>=scaled_min)
420 im->minval = -sensiblevalues[i-1]*(im->magfact);
422 if (sensiblevalues[i-1] >= scaled_max &&
423 sensiblevalues[i] <= scaled_max)
424 im->maxval = sensiblevalues[i-1]*(im->magfact);
426 if (-sensiblevalues[i-1]<=scaled_max &&
427 -sensiblevalues[i] >=scaled_max)
428 im->maxval = -sensiblevalues[i]*(im->magfact);
429 }
430 }
431 } else {
432 /* adjust min and max to the grid definition if there is one */
433 im->minval = (double)im->ylabfact * im->ygridstep *
434 floor(im->minval / ((double)im->ylabfact * im->ygridstep));
435 im->maxval = (double)im->ylabfact * im->ygridstep *
436 ceil(im->maxval /( (double)im->ylabfact * im->ygridstep));
437 }
439 #ifdef DEBUG
440 fprintf(stderr,"SCALED Min: %6.2f Max: %6.2f Factor: %6.2f\n",
441 im->minval,im->maxval,im->magfact);
442 #endif
443 }
445 void
446 apply_gridfit(image_desc_t *im)
447 {
448 if (isnan(im->minval) || isnan(im->maxval))
449 return;
450 ytr(im,DNAN);
451 if (im->logarithmic) {
452 double ya, yb, ypix, ypixfrac;
453 double log10_range = log10(im->maxval) - log10(im->minval);
454 ya = pow((double)10, floor(log10(im->minval)));
455 while (ya < im->minval)
456 ya *= 10;
457 if (ya > im->maxval)
458 return; /* don't have y=10^x gridline */
459 yb = ya * 10;
460 if (yb <= im->maxval) {
461 /* we have at least 2 y=10^x gridlines.
462 Make sure distance between them in pixels
463 are an integer by expanding im->maxval */
464 double y_pixel_delta = ytr(im, ya) - ytr(im, yb);
465 double factor = y_pixel_delta / floor(y_pixel_delta);
466 double new_log10_range = factor * log10_range;
467 double new_ymax_log10 = log10(im->minval) + new_log10_range;
468 im->maxval = pow(10, new_ymax_log10);
469 ytr(im, DNAN); /* reset precalc */
470 log10_range = log10(im->maxval) - log10(im->minval);
471 }
472 /* make sure first y=10^x gridline is located on
473 integer pixel position by moving scale slightly
474 downwards (sub-pixel movement) */
475 ypix = ytr(im, ya) + im->ysize; /* add im->ysize so it always is positive */
476 ypixfrac = ypix - floor(ypix);
477 if (ypixfrac > 0 && ypixfrac < 1) {
478 double yfrac = ypixfrac / im->ysize;
479 im->minval = pow(10, log10(im->minval) - yfrac * log10_range);
480 im->maxval = pow(10, log10(im->maxval) - yfrac * log10_range);
481 ytr(im, DNAN); /* reset precalc */
482 }
483 } else {
484 /* Make sure we have an integer pixel distance between
485 each minor gridline */
486 double ypos1 = ytr(im, im->minval);
487 double ypos2 = ytr(im, im->minval + im->ygrid_scale.gridstep);
488 double y_pixel_delta = ypos1 - ypos2;
489 double factor = y_pixel_delta / floor(y_pixel_delta);
490 double new_range = factor * (im->maxval - im->minval);
491 double gridstep = im->ygrid_scale.gridstep;
492 double minor_y, minor_y_px, minor_y_px_frac;
493 im->maxval = im->minval + new_range;
494 ytr(im, DNAN); /* reset precalc */
495 /* make sure first minor gridline is on integer pixel y coord */
496 minor_y = gridstep * floor(im->minval / gridstep);
497 while (minor_y < im->minval)
498 minor_y += gridstep;
499 minor_y_px = ytr(im, minor_y) + im->ysize; /* ensure > 0 by adding ysize */
500 minor_y_px_frac = minor_y_px - floor(minor_y_px);
501 if (minor_y_px_frac > 0 && minor_y_px_frac < 1) {
502 double yfrac = minor_y_px_frac / im->ysize;
503 double range = im->maxval - im->minval;
504 im->minval = im->minval - yfrac * range;
505 im->maxval = im->maxval - yfrac * range;
506 ytr(im, DNAN); /* reset precalc */
507 }
508 calc_horizontal_grid(im); /* recalc with changed im->maxval */
509 }
510 }
512 /* reduce data reimplementation by Alex */
514 void
515 reduce_data(
516 enum cf_en cf, /* which consolidation function ?*/
517 unsigned long cur_step, /* step the data currently is in */
518 time_t *start, /* start, end and step as requested ... */
519 time_t *end, /* ... by the application will be ... */
520 unsigned long *step, /* ... adjusted to represent reality */
521 unsigned long *ds_cnt, /* number of data sources in file */
522 rrd_value_t **data) /* two dimensional array containing the data */
523 {
524 int i,reduce_factor = ceil((double)(*step) / (double)cur_step);
525 unsigned long col,dst_row,row_cnt,start_offset,end_offset,skiprows=0;
526 rrd_value_t *srcptr,*dstptr;
528 (*step) = cur_step*reduce_factor; /* set new step size for reduced data */
529 dstptr = *data;
530 srcptr = *data;
531 row_cnt = ((*end)-(*start))/cur_step;
533 #ifdef DEBUG
534 #define DEBUG_REDUCE
535 #endif
536 #ifdef DEBUG_REDUCE
537 printf("Reducing %lu rows with factor %i time %lu to %lu, step %lu\n",
538 row_cnt,reduce_factor,*start,*end,cur_step);
539 for (col=0;col<row_cnt;col++) {
540 printf("time %10lu: ",*start+(col+1)*cur_step);
541 for (i=0;i<*ds_cnt;i++)
542 printf(" %8.2e",srcptr[*ds_cnt*col+i]);
543 printf("\n");
544 }
545 #endif
547 /* We have to combine [reduce_factor] rows of the source
548 ** into one row for the destination. Doing this we also
549 ** need to take care to combine the correct rows. First
550 ** alter the start and end time so that they are multiples
551 ** of the new step time. We cannot reduce the amount of
552 ** time so we have to move the end towards the future and
553 ** the start towards the past.
554 */
555 end_offset = (*end) % (*step);
556 start_offset = (*start) % (*step);
558 /* If there is a start offset (which cannot be more than
559 ** one destination row), skip the appropriate number of
560 ** source rows and one destination row. The appropriate
561 ** number is what we do know (start_offset/cur_step) of
562 ** the new interval (*step/cur_step aka reduce_factor).
563 */
564 #ifdef DEBUG_REDUCE
565 printf("start_offset: %lu end_offset: %lu\n",start_offset,end_offset);
566 printf("row_cnt before: %lu\n",row_cnt);
567 #endif
568 if (start_offset) {
569 (*start) = (*start)-start_offset;
570 skiprows=reduce_factor-start_offset/cur_step;
571 srcptr+=skiprows* *ds_cnt;
572 for (col=0;col<(*ds_cnt);col++) *dstptr++ = DNAN;
573 row_cnt-=skiprows;
574 }
575 #ifdef DEBUG_REDUCE
576 printf("row_cnt between: %lu\n",row_cnt);
577 #endif
579 /* At the end we have some rows that are not going to be
580 ** used, the amount is end_offset/cur_step
581 */
582 if (end_offset) {
583 (*end) = (*end)-end_offset+(*step);
584 skiprows = end_offset/cur_step;
585 row_cnt-=skiprows;
586 }
587 #ifdef DEBUG_REDUCE
588 printf("row_cnt after: %lu\n",row_cnt);
589 #endif
591 /* Sanity check: row_cnt should be multiple of reduce_factor */
592 /* if this gets triggered, something is REALLY WRONG ... we die immediately */
594 if (row_cnt%reduce_factor) {
595 printf("SANITY CHECK: %lu rows cannot be reduced by %i \n",
596 row_cnt,reduce_factor);
597 printf("BUG in reduce_data()\n");
598 exit(1);
599 }
601 /* Now combine reduce_factor intervals at a time
602 ** into one interval for the destination.
603 */
605 for (dst_row=0;(long int)row_cnt>=reduce_factor;dst_row++) {
606 for (col=0;col<(*ds_cnt);col++) {
607 rrd_value_t newval=DNAN;
608 unsigned long validval=0;
610 for (i=0;i<reduce_factor;i++) {
611 if (isnan(srcptr[i*(*ds_cnt)+col])) {
612 continue;
613 }
614 validval++;
615 if (isnan(newval)) newval = srcptr[i*(*ds_cnt)+col];
616 else {
617 switch (cf) {
618 case CF_HWPREDICT:
619 case CF_DEVSEASONAL:
620 case CF_DEVPREDICT:
621 case CF_SEASONAL:
622 case CF_AVERAGE:
623 newval += srcptr[i*(*ds_cnt)+col];
624 break;
625 case CF_MINIMUM:
626 newval = min (newval,srcptr[i*(*ds_cnt)+col]);
627 break;
628 case CF_FAILURES:
629 /* an interval contains a failure if any subintervals contained a failure */
630 case CF_MAXIMUM:
631 newval = max (newval,srcptr[i*(*ds_cnt)+col]);
632 break;
633 case CF_LAST:
634 newval = srcptr[i*(*ds_cnt)+col];
635 break;
636 }
637 }
638 }
639 if (validval == 0){newval = DNAN;} else{
640 switch (cf) {
641 case CF_HWPREDICT:
642 case CF_DEVSEASONAL:
643 case CF_DEVPREDICT:
644 case CF_SEASONAL:
645 case CF_AVERAGE:
646 newval /= validval;
647 break;
648 case CF_MINIMUM:
649 case CF_FAILURES:
650 case CF_MAXIMUM:
651 case CF_LAST:
652 break;
653 }
654 }
655 *dstptr++=newval;
656 }
657 srcptr+=(*ds_cnt)*reduce_factor;
658 row_cnt-=reduce_factor;
659 }
660 /* If we had to alter the endtime, we didn't have enough
661 ** source rows to fill the last row. Fill it with NaN.
662 */
663 if (end_offset) for (col=0;col<(*ds_cnt);col++) *dstptr++ = DNAN;
664 #ifdef DEBUG_REDUCE
665 row_cnt = ((*end)-(*start))/ *step;
666 srcptr = *data;
667 printf("Done reducing. Currently %lu rows, time %lu to %lu, step %lu\n",
668 row_cnt,*start,*end,*step);
669 for (col=0;col<row_cnt;col++) {
670 printf("time %10lu: ",*start+(col+1)*(*step));
671 for (i=0;i<*ds_cnt;i++)
672 printf(" %8.2e",srcptr[*ds_cnt*col+i]);
673 printf("\n");
674 }
675 #endif
676 }
679 /* get the data required for the graphs from the
680 relevant rrds ... */
682 int
683 data_fetch(image_desc_t *im )
684 {
685 int i,ii;
686 int skip;
688 /* pull the data from the log files ... */
689 for (i=0;i< (int)im->gdes_c;i++){
690 /* only GF_DEF elements fetch data */
691 if (im->gdes[i].gf != GF_DEF)
692 continue;
694 skip=0;
695 /* do we have it already ?*/
696 for (ii=0;ii<i;ii++) {
697 if (im->gdes[ii].gf != GF_DEF)
698 continue;
699 if ((strcmp(im->gdes[i].rrd, im->gdes[ii].rrd) == 0)
700 && (im->gdes[i].cf == im->gdes[ii].cf)
701 && (im->gdes[i].cf_reduce == im->gdes[ii].cf_reduce)
702 && (im->gdes[i].start == im->gdes[ii].start)
703 && (im->gdes[i].end == im->gdes[ii].end)
704 && (im->gdes[i].step == im->gdes[ii].step)) {
705 /* OK, the data is already there.
706 ** Just copy the header portion
707 */
708 im->gdes[i].start = im->gdes[ii].start;
709 im->gdes[i].end = im->gdes[ii].end;
710 im->gdes[i].step = im->gdes[ii].step;
711 im->gdes[i].ds_cnt = im->gdes[ii].ds_cnt;
712 im->gdes[i].ds_namv = im->gdes[ii].ds_namv;
713 im->gdes[i].data = im->gdes[ii].data;
714 im->gdes[i].data_first = 0;
715 skip=1;
716 }
717 if (skip)
718 break;
719 }
720 if (! skip) {
721 unsigned long ft_step = im->gdes[i].step ;
723 if((rrd_fetch_fn(im->gdes[i].rrd,
724 im->gdes[i].cf,
725 &im->gdes[i].start,
726 &im->gdes[i].end,
727 &ft_step,
728 &im->gdes[i].ds_cnt,
729 &im->gdes[i].ds_namv,
730 &im->gdes[i].data)) == -1){
731 return -1;
732 }
733 im->gdes[i].data_first = 1;
734 im->gdes[i].step = im->step;
736 if (ft_step < im->gdes[i].step) {
737 reduce_data(im->gdes[i].cf_reduce,
738 ft_step,
739 &im->gdes[i].start,
740 &im->gdes[i].end,
741 &im->gdes[i].step,
742 &im->gdes[i].ds_cnt,
743 &im->gdes[i].data);
744 } else {
745 im->gdes[i].step = ft_step;
746 }
747 }
749 /* lets see if the required data source is really there */
750 for(ii=0;ii<(int)im->gdes[i].ds_cnt;ii++){
751 if(strcmp(im->gdes[i].ds_namv[ii],im->gdes[i].ds_nam) == 0){
752 im->gdes[i].ds=ii; }
753 }
754 if (im->gdes[i].ds== -1){
755 rrd_set_error("No DS called '%s' in '%s'",
756 im->gdes[i].ds_nam,im->gdes[i].rrd);
757 return -1;
758 }
760 }
761 return 0;
762 }
764 /* evaluate the expressions in the CDEF functions */
766 /*************************************************************
767 * CDEF stuff
768 *************************************************************/
770 long
771 find_var_wrapper(void *arg1, char *key)
772 {
773 return find_var((image_desc_t *) arg1, key);
774 }
776 /* find gdes containing var*/
777 long
778 find_var(image_desc_t *im, char *key){
779 long ii;
780 for(ii=0;ii<im->gdes_c-1;ii++){
781 if((im->gdes[ii].gf == GF_DEF
782 || im->gdes[ii].gf == GF_VDEF
783 || im->gdes[ii].gf == GF_CDEF)
784 && (strcmp(im->gdes[ii].vname,key) == 0)){
785 return ii;
786 }
787 }
788 return -1;
789 }
791 /* find the largest common denominator for all the numbers
792 in the 0 terminated num array */
793 long
794 lcd(long *num){
795 long rest;
796 int i;
797 for (i=0;num[i+1]!=0;i++){
798 do {
799 rest=num[i] % num[i+1];
800 num[i]=num[i+1]; num[i+1]=rest;
801 } while (rest!=0);
802 num[i+1] = num[i];
803 }
804 /* return i==0?num[i]:num[i-1]; */
805 return num[i];
806 }
808 /* run the rpn calculator on all the VDEF and CDEF arguments */
809 int
810 data_calc( image_desc_t *im){
812 int gdi;
813 int dataidx;
814 long *steparray, rpi;
815 int stepcnt;
816 time_t now;
817 rpnstack_t rpnstack;
819 rpnstack_init(&rpnstack);
821 for (gdi=0;gdi<im->gdes_c;gdi++){
822 /* Look for GF_VDEF and GF_CDEF in the same loop,
823 * so CDEFs can use VDEFs and vice versa
824 */
825 switch (im->gdes[gdi].gf) {
826 case GF_XPORT:
827 break;
828 case GF_SHIFT: {
829 graph_desc_t *vdp = &im->gdes[im->gdes[gdi].vidx];
831 /* remove current shift */
832 vdp->start -= vdp->shift;
833 vdp->end -= vdp->shift;
835 /* vdef */
836 if (im->gdes[gdi].shidx >= 0)
837 vdp->shift = im->gdes[im->gdes[gdi].shidx].vf.val;
838 /* constant */
839 else
840 vdp->shift = im->gdes[gdi].shval;
842 /* normalize shift to multiple of consolidated step */
843 vdp->shift = (vdp->shift / (long)vdp->step) * (long)vdp->step;
845 /* apply shift */
846 vdp->start += vdp->shift;
847 vdp->end += vdp->shift;
848 break;
849 }
850 case GF_VDEF:
851 /* A VDEF has no DS. This also signals other parts
852 * of rrdtool that this is a VDEF value, not a CDEF.
853 */
854 im->gdes[gdi].ds_cnt = 0;
855 if (vdef_calc(im,gdi)) {
856 rrd_set_error("Error processing VDEF '%s'"
857 ,im->gdes[gdi].vname
858 );
859 rpnstack_free(&rpnstack);
860 return -1;
861 }
862 break;
863 case GF_CDEF:
864 im->gdes[gdi].ds_cnt = 1;
865 im->gdes[gdi].ds = 0;
866 im->gdes[gdi].data_first = 1;
867 im->gdes[gdi].start = 0;
868 im->gdes[gdi].end = 0;
869 steparray=NULL;
870 stepcnt = 0;
871 dataidx=-1;
873 /* Find the variables in the expression.
874 * - VDEF variables are substituted by their values
875 * and the opcode is changed into OP_NUMBER.
876 * - CDEF variables are analized for their step size,
877 * the lowest common denominator of all the step
878 * sizes of the data sources involved is calculated
879 * and the resulting number is the step size for the
880 * resulting data source.
881 */
882 for(rpi=0;im->gdes[gdi].rpnp[rpi].op != OP_END;rpi++){
883 if(im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
884 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER){
885 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
886 if (im->gdes[ptr].ds_cnt == 0) {
887 #if 0
888 printf("DEBUG: inside CDEF '%s' processing VDEF '%s'\n",
889 im->gdes[gdi].vname,
890 im->gdes[ptr].vname);
891 printf("DEBUG: value from vdef is %f\n",im->gdes[ptr].vf.val);
892 #endif
893 im->gdes[gdi].rpnp[rpi].val = im->gdes[ptr].vf.val;
894 im->gdes[gdi].rpnp[rpi].op = OP_NUMBER;
895 } else {
896 if ((steparray =
897 rrd_realloc(steparray,
898 (++stepcnt+1)*sizeof(*steparray)))==NULL){
899 rrd_set_error("realloc steparray");
900 rpnstack_free(&rpnstack);
901 return -1;
902 };
904 steparray[stepcnt-1] = im->gdes[ptr].step;
906 /* adjust start and end of cdef (gdi) so
907 * that it runs from the latest start point
908 * to the earliest endpoint of any of the
909 * rras involved (ptr)
910 */
911 if(im->gdes[gdi].start < im->gdes[ptr].start)
912 im->gdes[gdi].start = im->gdes[ptr].start;
914 if(im->gdes[gdi].end == 0 ||
915 im->gdes[gdi].end > im->gdes[ptr].end)
916 im->gdes[gdi].end = im->gdes[ptr].end;
918 /* store pointer to the first element of
919 * the rra providing data for variable,
920 * further save step size and data source
921 * count of this rra
922 */
923 im->gdes[gdi].rpnp[rpi].data = im->gdes[ptr].data + im->gdes[ptr].ds;
924 im->gdes[gdi].rpnp[rpi].step = im->gdes[ptr].step;
925 im->gdes[gdi].rpnp[rpi].ds_cnt = im->gdes[ptr].ds_cnt;
927 /* backoff the *.data ptr; this is done so
928 * rpncalc() function doesn't have to treat
929 * the first case differently
930 */
931 } /* if ds_cnt != 0 */
932 } /* if OP_VARIABLE */
933 } /* loop through all rpi */
935 /* move the data pointers to the correct period */
936 for(rpi=0;im->gdes[gdi].rpnp[rpi].op != OP_END;rpi++){
937 if(im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
938 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER){
939 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
940 long diff = im->gdes[gdi].start - im->gdes[ptr].start;
942 if(diff > 0)
943 im->gdes[gdi].rpnp[rpi].data += (diff / im->gdes[ptr].step) * im->gdes[ptr].ds_cnt;
944 }
945 }
947 if(steparray == NULL){
948 rrd_set_error("rpn expressions without DEF"
949 " or CDEF variables are not supported");
950 rpnstack_free(&rpnstack);
951 return -1;
952 }
953 steparray[stepcnt]=0;
954 /* Now find the resulting step. All steps in all
955 * used RRAs have to be visited
956 */
957 im->gdes[gdi].step = lcd(steparray);
958 free(steparray);
959 if((im->gdes[gdi].data = malloc((
960 (im->gdes[gdi].end-im->gdes[gdi].start)
961 / im->gdes[gdi].step)
962 * sizeof(double)))==NULL){
963 rrd_set_error("malloc im->gdes[gdi].data");
964 rpnstack_free(&rpnstack);
965 return -1;
966 }
968 /* Step through the new cdef results array and
969 * calculate the values
970 */
971 for (now = im->gdes[gdi].start + im->gdes[gdi].step;
972 now<=im->gdes[gdi].end;
973 now += im->gdes[gdi].step)
974 {
975 rpnp_t *rpnp = im -> gdes[gdi].rpnp;
977 /* 3rd arg of rpn_calc is for OP_VARIABLE lookups;
978 * in this case we are advancing by timesteps;
979 * we use the fact that time_t is a synonym for long
980 */
981 if (rpn_calc(rpnp,&rpnstack,(long) now,
982 im->gdes[gdi].data,++dataidx) == -1) {
983 /* rpn_calc sets the error string */
984 rpnstack_free(&rpnstack);
985 return -1;
986 }
987 } /* enumerate over time steps within a CDEF */
988 break;
989 default:
990 continue;
991 }
992 } /* enumerate over CDEFs */
993 rpnstack_free(&rpnstack);
994 return 0;
995 }
997 /* massage data so, that we get one value for each x coordinate in the graph */
998 int
999 data_proc( image_desc_t *im ){
1000 long i,ii;
1001 double pixstep = (double)(im->end-im->start)
1002 /(double)im->xsize; /* how much time
1003 passes in one pixel */
1004 double paintval;
1005 double minval=DNAN,maxval=DNAN;
1007 unsigned long gr_time;
1009 /* memory for the processed data */
1010 for(i=0;i<im->gdes_c;i++) {
1011 if((im->gdes[i].gf==GF_LINE) ||
1012 (im->gdes[i].gf==GF_AREA) ||
1013 (im->gdes[i].gf==GF_TICK) ||
1014 (im->gdes[i].gf==GF_STACK)) {
1015 if((im->gdes[i].p_data = malloc((im->xsize +1)
1016 * sizeof(rrd_value_t)))==NULL){
1017 rrd_set_error("malloc data_proc");
1018 return -1;
1019 }
1020 }
1021 }
1023 for (i=0;i<im->xsize;i++) { /* for each pixel */
1024 long vidx;
1025 gr_time = im->start+pixstep*i; /* time of the current step */
1026 paintval=0.0;
1028 for (ii=0;ii<im->gdes_c;ii++) {
1029 double value;
1030 switch (im->gdes[ii].gf) {
1031 case GF_LINE:
1032 case GF_AREA:
1033 case GF_TICK:
1034 if (!im->gdes[ii].stack)
1035 paintval = 0.0;
1036 case GF_STACK:
1037 value = im->gdes[ii].yrule;
1038 if (isnan(value) || (im->gdes[ii].gf == GF_TICK)) {
1039 /* The time of the data doesn't necessarily match
1040 ** the time of the graph. Beware.
1041 */
1042 vidx = im->gdes[ii].vidx;
1043 if (im->gdes[vidx].gf == GF_VDEF) {
1044 value = im->gdes[vidx].vf.val;
1045 } else if (((long int)gr_time >= (long int)im->gdes[vidx].start) &&
1046 ((long int)gr_time <= (long int)im->gdes[vidx].end) ) {
1047 value = im->gdes[vidx].data[
1048 (unsigned long) floor(
1049 (double)(gr_time - im->gdes[vidx].start)
1050 / im->gdes[vidx].step)
1051 * im->gdes[vidx].ds_cnt
1052 + im->gdes[vidx].ds
1053 ];
1054 } else {
1055 value = DNAN;
1056 }
1057 };
1059 if (! isnan(value)) {
1060 paintval += value;
1061 im->gdes[ii].p_data[i] = paintval;
1062 /* GF_TICK: the data values are not
1063 ** relevant for min and max
1064 */
1065 if (finite(paintval) && im->gdes[ii].gf != GF_TICK ) {
1066 if (isnan(minval) || paintval < minval)
1067 minval = paintval;
1068 if (isnan(maxval) || paintval > maxval)
1069 maxval = paintval;
1070 }
1071 } else {
1072 im->gdes[ii].p_data[i] = DNAN;
1073 }
1074 break;
1075 default:
1076 break;
1077 }
1078 }
1079 }
1081 /* if min or max have not been asigned a value this is because
1082 there was no data in the graph ... this is not good ...
1083 lets set these to dummy values then ... */
1085 if (isnan(minval)) minval = 0.0;
1086 if (isnan(maxval)) maxval = 1.0;
1088 /* adjust min and max values */
1089 if (isnan(im->minval)
1090 /* don't adjust low-end with log scale */
1091 || ((!im->logarithmic && !im->rigid) && im->minval > minval)
1092 )
1093 im->minval = minval;
1094 if (isnan(im->maxval)
1095 || (!im->rigid && im->maxval < maxval)
1096 ) {
1097 if (im->logarithmic)
1098 im->maxval = maxval * 1.1;
1099 else
1100 im->maxval = maxval;
1101 }
1102 /* make sure min is smaller than max */
1103 if (im->minval > im->maxval) {
1104 im->minval = 0.99 * im->maxval;
1105 }
1107 /* make sure min and max are not equal */
1108 if (im->minval == im->maxval) {
1109 im->maxval *= 1.01;
1110 if (! im->logarithmic) {
1111 im->minval *= 0.99;
1112 }
1113 /* make sure min and max are not both zero */
1114 if (im->maxval == 0.0) {
1115 im->maxval = 1.0;
1116 }
1117 }
1118 return 0;
1119 }
1123 /* identify the point where the first gridline, label ... gets placed */
1125 time_t
1126 find_first_time(
1127 time_t start, /* what is the initial time */
1128 enum tmt_en baseint, /* what is the basic interval */
1129 long basestep /* how many if these do we jump a time */
1130 )
1131 {
1132 struct tm tm;
1133 localtime_r(&start, &tm);
1134 switch(baseint){
1135 case TMT_SECOND:
1136 tm.tm_sec -= tm.tm_sec % basestep; break;
1137 case TMT_MINUTE:
1138 tm.tm_sec=0;
1139 tm.tm_min -= tm.tm_min % basestep;
1140 break;
1141 case TMT_HOUR:
1142 tm.tm_sec=0;
1143 tm.tm_min = 0;
1144 tm.tm_hour -= tm.tm_hour % basestep; break;
1145 case TMT_DAY:
1146 /* we do NOT look at the basestep for this ... */
1147 tm.tm_sec=0;
1148 tm.tm_min = 0;
1149 tm.tm_hour = 0; break;
1150 case TMT_WEEK:
1151 /* we do NOT look at the basestep for this ... */
1152 tm.tm_sec=0;
1153 tm.tm_min = 0;
1154 tm.tm_hour = 0;
1155 tm.tm_mday -= tm.tm_wday -1; /* -1 because we want the monday */
1156 if (tm.tm_wday==0) tm.tm_mday -= 7; /* we want the *previous* monday */
1157 break;
1158 case TMT_MONTH:
1159 tm.tm_sec=0;
1160 tm.tm_min = 0;
1161 tm.tm_hour = 0;
1162 tm.tm_mday = 1;
1163 tm.tm_mon -= tm.tm_mon % basestep; break;
1165 case TMT_YEAR:
1166 tm.tm_sec=0;
1167 tm.tm_min = 0;
1168 tm.tm_hour = 0;
1169 tm.tm_mday = 1;
1170 tm.tm_mon = 0;
1171 tm.tm_year -= (tm.tm_year+1900) % basestep;
1173 }
1174 return mktime(&tm);
1175 }
1176 /* identify the point where the next gridline, label ... gets placed */
1177 time_t
1178 find_next_time(
1179 time_t current, /* what is the initial time */
1180 enum tmt_en baseint, /* what is the basic interval */
1181 long basestep /* how many if these do we jump a time */
1182 )
1183 {
1184 struct tm tm;
1185 time_t madetime;
1186 localtime_r(¤t, &tm);
1187 do {
1188 switch(baseint){
1189 case TMT_SECOND:
1190 tm.tm_sec += basestep; break;
1191 case TMT_MINUTE:
1192 tm.tm_min += basestep; break;
1193 case TMT_HOUR:
1194 tm.tm_hour += basestep; break;
1195 case TMT_DAY:
1196 tm.tm_mday += basestep; break;
1197 case TMT_WEEK:
1198 tm.tm_mday += 7*basestep; break;
1199 case TMT_MONTH:
1200 tm.tm_mon += basestep; break;
1201 case TMT_YEAR:
1202 tm.tm_year += basestep;
1203 }
1204 madetime = mktime(&tm);
1205 } while (madetime == -1); /* this is necessary to skip impssible times
1206 like the daylight saving time skips */
1207 return madetime;
1209 }
1212 /* calculate values required for PRINT and GPRINT functions */
1214 int
1215 print_calc(image_desc_t *im, char ***prdata)
1216 {
1217 long i,ii,validsteps;
1218 double printval;
1219 time_t printtime;
1220 int graphelement = 0;
1221 long vidx;
1222 int max_ii;
1223 double magfact = -1;
1224 char *si_symb = "";
1225 char *percent_s;
1226 int prlines = 1;
1227 if (im->imginfo) prlines++;
1228 for(i=0;i<im->gdes_c;i++){
1229 switch(im->gdes[i].gf){
1230 case GF_PRINT:
1231 prlines++;
1232 if(((*prdata) = rrd_realloc((*prdata),prlines*sizeof(char *)))==NULL){
1233 rrd_set_error("realloc prdata");
1234 return 0;
1235 }
1236 case GF_GPRINT:
1237 /* PRINT and GPRINT can now print VDEF generated values.
1238 * There's no need to do any calculations on them as these
1239 * calculations were already made.
1240 */
1241 vidx = im->gdes[i].vidx;
1242 if (im->gdes[vidx].gf==GF_VDEF) { /* simply use vals */
1243 printval = im->gdes[vidx].vf.val;
1244 printtime = im->gdes[vidx].vf.when;
1245 } else { /* need to calculate max,min,avg etcetera */
1246 max_ii =((im->gdes[vidx].end
1247 - im->gdes[vidx].start)
1248 / im->gdes[vidx].step
1249 * im->gdes[vidx].ds_cnt);
1250 printval = DNAN;
1251 validsteps = 0;
1252 for( ii=im->gdes[vidx].ds;
1253 ii < max_ii;
1254 ii+=im->gdes[vidx].ds_cnt){
1255 if (! finite(im->gdes[vidx].data[ii]))
1256 continue;
1257 if (isnan(printval)){
1258 printval = im->gdes[vidx].data[ii];
1259 validsteps++;
1260 continue;
1261 }
1263 switch (im->gdes[i].cf){
1264 case CF_HWPREDICT:
1265 case CF_DEVPREDICT:
1266 case CF_DEVSEASONAL:
1267 case CF_SEASONAL:
1268 case CF_AVERAGE:
1269 validsteps++;
1270 printval += im->gdes[vidx].data[ii];
1271 break;
1272 case CF_MINIMUM:
1273 printval = min( printval, im->gdes[vidx].data[ii]);
1274 break;
1275 case CF_FAILURES:
1276 case CF_MAXIMUM:
1277 printval = max( printval, im->gdes[vidx].data[ii]);
1278 break;
1279 case CF_LAST:
1280 printval = im->gdes[vidx].data[ii];
1281 }
1282 }
1283 if (im->gdes[i].cf==CF_AVERAGE || im->gdes[i].cf > CF_LAST) {
1284 if (validsteps > 1) {
1285 printval = (printval / validsteps);
1286 }
1287 }
1288 } /* prepare printval */
1290 if (!strcmp(im->gdes[i].format,"%c")) { /* VDEF time print */
1291 char ctime_buf[128]; /* PS: for ctime_r, must be >= 26 chars */
1292 if (im->gdes[i].gf == GF_PRINT){
1293 (*prdata)[prlines-2] = malloc((FMT_LEG_LEN+2)*sizeof(char));
1294 sprintf((*prdata)[prlines-2],"%s (%lu)",
1295 ctime_r(&printtime,ctime_buf),printtime);
1296 (*prdata)[prlines-1] = NULL;
1297 } else {
1298 sprintf(im->gdes[i].legend,"%s (%lu)",
1299 ctime_r(&printtime,ctime_buf),printtime);
1300 graphelement = 1;
1301 }
1302 } else {
1303 if ((percent_s = strstr(im->gdes[i].format,"%S")) != NULL) {
1304 /* Magfact is set to -1 upon entry to print_calc. If it
1305 * is still less than 0, then we need to run auto_scale.
1306 * Otherwise, put the value into the correct units. If
1307 * the value is 0, then do not set the symbol or magnification
1308 * so next the calculation will be performed again. */
1309 if (magfact < 0.0) {
1310 auto_scale(im,&printval,&si_symb,&magfact);
1311 if (printval == 0.0)
1312 magfact = -1.0;
1313 } else {
1314 printval /= magfact;
1315 }
1316 *(++percent_s) = 's';
1317 } else if (strstr(im->gdes[i].format,"%s") != NULL) {
1318 auto_scale(im,&printval,&si_symb,&magfact);
1319 }
1321 if (im->gdes[i].gf == GF_PRINT){
1322 (*prdata)[prlines-2] = malloc((FMT_LEG_LEN+2)*sizeof(char));
1323 (*prdata)[prlines-1] = NULL;
1324 if (bad_format(im->gdes[i].format)) {
1325 rrd_set_error("bad format for [G]PRINT in '%s'", im->gdes[i].format);
1326 return -1;
1327 }
1328 #ifdef HAVE_SNPRINTF
1329 snprintf((*prdata)[prlines-2],FMT_LEG_LEN,im->gdes[i].format,printval,si_symb);
1330 #else
1331 sprintf((*prdata)[prlines-2],im->gdes[i].format,printval,si_symb);
1332 #endif
1333 } else {
1334 /* GF_GPRINT */
1336 if (bad_format(im->gdes[i].format)) {
1337 rrd_set_error("bad format for [G]PRINT in '%s'", im->gdes[i].format);
1338 return -1;
1339 }
1340 #ifdef HAVE_SNPRINTF
1341 snprintf(im->gdes[i].legend,FMT_LEG_LEN-2,im->gdes[i].format,printval,si_symb);
1342 #else
1343 sprintf(im->gdes[i].legend,im->gdes[i].format,printval,si_symb);
1344 #endif
1345 graphelement = 1;
1346 }
1347 }
1348 break;
1349 case GF_LINE:
1350 case GF_AREA:
1351 case GF_TICK:
1352 case GF_STACK:
1353 case GF_HRULE:
1354 case GF_VRULE:
1355 graphelement = 1;
1356 break;
1357 case GF_COMMENT:
1358 case GF_DEF:
1359 case GF_CDEF:
1360 case GF_VDEF:
1361 case GF_PART:
1362 case GF_SHIFT:
1363 case GF_XPORT:
1364 break;
1365 }
1366 }
1367 return graphelement;
1368 }
1371 /* place legends with color spots */
1372 int
1373 leg_place(image_desc_t *im)
1374 {
1375 /* graph labels */
1376 int interleg = im->text_prop[TEXT_PROP_LEGEND].size*2.0;
1377 int box =im->text_prop[TEXT_PROP_LEGEND].size*1.5;
1378 int border = im->text_prop[TEXT_PROP_LEGEND].size*2.0;
1379 int fill=0, fill_last;
1380 int leg_c = 0;
1381 int leg_x = border, leg_y = im->yimg;
1382 int leg_cc;
1383 int glue = 0;
1384 int i,ii, mark = 0;
1385 char prt_fctn; /*special printfunctions */
1386 int *legspace;
1388 if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
1389 if ((legspace = malloc(im->gdes_c*sizeof(int)))==NULL){
1390 rrd_set_error("malloc for legspace");
1391 return -1;
1392 }
1394 for(i=0;i<im->gdes_c;i++){
1395 fill_last = fill;
1397 /* hid legends for rules which are not displayed */
1399 if(!(im->extra_flags & FORCE_RULES_LEGEND)) {
1400 if (im->gdes[i].gf == GF_HRULE &&
1401 (im->gdes[i].yrule < im->minval || im->gdes[i].yrule > im->maxval))
1402 im->gdes[i].legend[0] = '\0';
1404 if (im->gdes[i].gf == GF_VRULE &&
1405 (im->gdes[i].xrule < im->start || im->gdes[i].xrule > im->end))
1406 im->gdes[i].legend[0] = '\0';
1407 }
1409 leg_cc = strlen(im->gdes[i].legend);
1411 /* is there a controle code ant the end of the legend string ? */
1412 if (leg_cc >= 2 && im->gdes[i].legend[leg_cc-2] == '\\') {
1413 prt_fctn = im->gdes[i].legend[leg_cc-1];
1414 leg_cc -= 2;
1415 im->gdes[i].legend[leg_cc] = '\0';
1416 } else {
1417 prt_fctn = '\0';
1418 }
1419 /* remove exess space */
1420 while (prt_fctn=='g' &&
1421 leg_cc > 0 &&
1422 im->gdes[i].legend[leg_cc-1]==' '){
1423 leg_cc--;
1424 im->gdes[i].legend[leg_cc]='\0';
1425 }
1426 if (leg_cc != 0 ){
1427 legspace[i]=(prt_fctn=='g' ? 0 : interleg);
1429 if (fill > 0){
1430 /* no interleg space if string ends in \g */
1431 fill += legspace[i];
1432 }
1433 if (im->gdes[i].gf != GF_GPRINT &&
1434 im->gdes[i].gf != GF_COMMENT) {
1435 fill += box;
1436 }
1437 fill += gfx_get_text_width(im->canvas, fill+border,
1438 im->text_prop[TEXT_PROP_LEGEND].font,
1439 im->text_prop[TEXT_PROP_LEGEND].size,
1440 im->tabwidth,
1441 im->gdes[i].legend, 0);
1442 leg_c++;
1443 } else {
1444 legspace[i]=0;
1445 }
1446 /* who said there was a special tag ... ?*/
1447 if (prt_fctn=='g') {
1448 prt_fctn = '\0';
1449 }
1450 if (prt_fctn == '\0') {
1451 if (i == im->gdes_c -1 ) prt_fctn ='l';
1453 /* is it time to place the legends ? */
1454 if (fill > im->ximg - 2*border){
1455 if (leg_c > 1) {
1456 /* go back one */
1457 i--;
1458 fill = fill_last;
1459 leg_c--;
1460 prt_fctn = 'j';
1461 } else {
1462 prt_fctn = 'l';
1463 }
1465 }
1466 }
1469 if (prt_fctn != '\0'){
1470 leg_x = border;
1471 if (leg_c >= 2 && prt_fctn == 'j') {
1472 glue = (im->ximg - fill - 2* border) / (leg_c-1);
1473 } else {
1474 glue = 0;
1475 }
1476 if (prt_fctn =='c') leg_x = (im->ximg - fill) / 2.0;
1477 if (prt_fctn =='r') leg_x = im->ximg - fill - border;
1479 for(ii=mark;ii<=i;ii++){
1480 if(im->gdes[ii].legend[0]=='\0')
1481 continue;
1482 im->gdes[ii].leg_x = leg_x;
1483 im->gdes[ii].leg_y = leg_y;
1484 leg_x +=
1485 gfx_get_text_width(im->canvas, leg_x,
1486 im->text_prop[TEXT_PROP_LEGEND].font,
1487 im->text_prop[TEXT_PROP_LEGEND].size,
1488 im->tabwidth,
1489 im->gdes[ii].legend, 0)
1490 + legspace[ii]
1491 + glue;
1492 if (im->gdes[ii].gf != GF_GPRINT &&
1493 im->gdes[ii].gf != GF_COMMENT)
1494 leg_x += box;
1495 }
1496 leg_y = leg_y + im->text_prop[TEXT_PROP_LEGEND].size*1.2;
1497 if (prt_fctn == 's') leg_y -= im->text_prop[TEXT_PROP_LEGEND].size*1.2;
1498 fill = 0;
1499 leg_c = 0;
1500 mark = ii;
1501 }
1502 }
1503 im->yimg = leg_y;
1504 free(legspace);
1505 }
1506 return 0;
1507 }
1509 /* create a grid on the graph. it determines what to do
1510 from the values of xsize, start and end */
1512 /* the xaxis labels are determined from the number of seconds per pixel
1513 in the requested graph */
1517 int
1518 calc_horizontal_grid(image_desc_t *im)
1519 {
1520 double range;
1521 double scaledrange;
1522 int pixel,i;
1523 int gridind;
1524 int decimals, fractionals;
1526 im->ygrid_scale.labfact=2;
1527 gridind=-1;
1528 range = im->maxval - im->minval;
1529 scaledrange = range / im->magfact;
1531 /* does the scale of this graph make it impossible to put lines
1532 on it? If so, give up. */
1533 if (isnan(scaledrange)) {
1534 return 0;
1535 }
1537 /* find grid spaceing */
1538 pixel=1;
1539 if(isnan(im->ygridstep)){
1540 if(im->extra_flags & ALTYGRID) {
1541 /* find the value with max number of digits. Get number of digits */
1542 decimals = ceil(log10(max(fabs(im->maxval), fabs(im->minval))));
1543 if(decimals <= 0) /* everything is small. make place for zero */
1544 decimals = 1;
1546 fractionals = floor(log10(range));
1547 if(fractionals < 0) /* small amplitude. */
1548 sprintf(im->ygrid_scale.labfmt, "%%%d.%df", decimals - fractionals + 1, -fractionals + 1);
1549 else
1550 sprintf(im->ygrid_scale.labfmt, "%%%d.1f", decimals + 1);
1551 im->ygrid_scale.gridstep = pow((double)10, (double)fractionals);
1552 if(im->ygrid_scale.gridstep == 0) /* range is one -> 0.1 is reasonable scale */
1553 im->ygrid_scale.gridstep = 0.1;
1554 /* should have at least 5 lines but no more then 15 */
1555 if(range/im->ygrid_scale.gridstep < 5)
1556 im->ygrid_scale.gridstep /= 10;
1557 if(range/im->ygrid_scale.gridstep > 15)
1558 im->ygrid_scale.gridstep *= 10;
1559 if(range/im->ygrid_scale.gridstep > 5) {
1560 im->ygrid_scale.labfact = 1;
1561 if(range/im->ygrid_scale.gridstep > 8)
1562 im->ygrid_scale.labfact = 2;
1563 }
1564 else {
1565 im->ygrid_scale.gridstep /= 5;
1566 im->ygrid_scale.labfact = 5;
1567 }
1568 }
1569 else {
1570 for(i=0;ylab[i].grid > 0;i++){
1571 pixel = im->ysize / (scaledrange / ylab[i].grid);
1572 if (gridind == -1 && pixel > 5) {
1573 gridind = i;
1574 break;
1575 }
1576 }
1578 for(i=0; i<4;i++) {
1579 if (pixel * ylab[gridind].lfac[i] >= 2 * im->text_prop[TEXT_PROP_AXIS].size) {
1580 im->ygrid_scale.labfact = ylab[gridind].lfac[i];
1581 break;
1582 }
1583 }
1585 im->ygrid_scale.gridstep = ylab[gridind].grid * im->magfact;
1586 }
1587 } else {
1588 im->ygrid_scale.gridstep = im->ygridstep;
1589 im->ygrid_scale.labfact = im->ylabfact;
1590 }
1591 return 1;
1592 }
1594 int draw_horizontal_grid(image_desc_t *im)
1595 {
1596 int i;
1597 double scaledstep;
1598 char graph_label[100];
1599 double X0=im->xorigin;
1600 double X1=im->xorigin+im->xsize;
1602 int sgrid = (int)( im->minval / im->ygrid_scale.gridstep - 1);
1603 int egrid = (int)( im->maxval / im->ygrid_scale.gridstep + 1);
1604 scaledstep = im->ygrid_scale.gridstep/im->magfact;
1605 for (i = sgrid; i <= egrid; i++){
1606 double Y0=ytr(im,im->ygrid_scale.gridstep*i);
1607 if ( Y0 >= im->yorigin-im->ysize
1608 && Y0 <= im->yorigin){
1609 if(i % im->ygrid_scale.labfact == 0){
1610 if (i==0 || im->symbol == ' ') {
1611 if(scaledstep < 1){
1612 if(im->extra_flags & ALTYGRID) {
1613 sprintf(graph_label,im->ygrid_scale.labfmt,scaledstep*i);
1614 }
1615 else {
1616 sprintf(graph_label,"%4.1f",scaledstep*i);
1617 }
1618 } else {
1619 sprintf(graph_label,"%4.0f",scaledstep*i);
1620 }
1621 }else {
1622 if(scaledstep < 1){
1623 sprintf(graph_label,"%4.1f %c",scaledstep*i, im->symbol);
1624 } else {
1625 sprintf(graph_label,"%4.0f %c",scaledstep*i, im->symbol);
1626 }
1627 }
1629 gfx_new_text ( im->canvas,
1630 X0-im->text_prop[TEXT_PROP_AXIS].size/1.5, Y0,
1631 im->graph_col[GRC_FONT],
1632 im->text_prop[TEXT_PROP_AXIS].font,
1633 im->text_prop[TEXT_PROP_AXIS].size,
1634 im->tabwidth, 0.0, GFX_H_RIGHT, GFX_V_CENTER,
1635 graph_label );
1636 gfx_new_dashed_line ( im->canvas,
1637 X0-2,Y0,
1638 X1+2,Y0,
1639 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1640 im->grid_dash_on, im->grid_dash_off);
1642 } else if (!(im->extra_flags & NOMINOR)) {
1643 gfx_new_dashed_line ( im->canvas,
1644 X0-1,Y0,
1645 X1+1,Y0,
1646 GRIDWIDTH, im->graph_col[GRC_GRID],
1647 im->grid_dash_on, im->grid_dash_off);
1649 }
1650 }
1651 }
1652 return 1;
1653 }
1655 /* logaritmic horizontal grid */
1656 int
1657 horizontal_log_grid(image_desc_t *im)
1658 {
1659 double pixpex;
1660 int ii,i;
1661 int minoridx=0, majoridx=0;
1662 char graph_label[100];
1663 double X0,X1,Y0;
1664 double value, pixperstep, minstep;
1666 /* find grid spaceing */
1667 pixpex= (double)im->ysize / (log10(im->maxval) - log10(im->minval));
1669 if (isnan(pixpex)) {
1670 return 0;
1671 }
1673 for(i=0;yloglab[i][0] > 0;i++){
1674 minstep = log10(yloglab[i][0]);
1675 for(ii=1;yloglab[i][ii+1] > 0;ii++){
1676 if(yloglab[i][ii+2]==0){
1677 minstep = log10(yloglab[i][ii+1])-log10(yloglab[i][ii]);
1678 break;
1679 }
1680 }
1681 pixperstep = pixpex * minstep;
1682 if(pixperstep > 5){minoridx = i;}
1683 if(pixperstep > 2 * im->text_prop[TEXT_PROP_LEGEND].size){majoridx = i;}
1684 }
1686 X0=im->xorigin;
1687 X1=im->xorigin+im->xsize;
1688 /* paint minor grid */
1689 for (value = pow((double)10, log10(im->minval)
1690 - fmod(log10(im->minval),log10(yloglab[minoridx][0])));
1691 value <= im->maxval;
1692 value *= yloglab[minoridx][0]){
1693 if (value < im->minval) continue;
1694 i=0;
1695 while(yloglab[minoridx][++i] > 0){
1696 Y0 = ytr(im,value * yloglab[minoridx][i]);
1697 if (Y0 <= im->yorigin - im->ysize) break;
1698 gfx_new_dashed_line ( im->canvas,
1699 X0-1,Y0,
1700 X1+1,Y0,
1701 GRIDWIDTH, im->graph_col[GRC_GRID],
1702 im->grid_dash_on, im->grid_dash_off);
1703 }
1704 }
1706 /* paint major grid and labels*/
1707 for (value = pow((double)10, log10(im->minval)
1708 - fmod(log10(im->minval),log10(yloglab[majoridx][0])));
1709 value <= im->maxval;
1710 value *= yloglab[majoridx][0]){
1711 if (value < im->minval) continue;
1712 i=0;
1713 while(yloglab[majoridx][++i] > 0){
1714 Y0 = ytr(im,value * yloglab[majoridx][i]);
1715 if (Y0 <= im->yorigin - im->ysize) break;
1716 gfx_new_dashed_line ( im->canvas,
1717 X0-2,Y0,
1718 X1+2,Y0,
1719 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1720 im->grid_dash_on, im->grid_dash_off);
1722 sprintf(graph_label,"%3.0e",value * yloglab[majoridx][i]);
1723 gfx_new_text ( im->canvas,
1724 X0-im->text_prop[TEXT_PROP_AXIS].size/1.5, Y0,
1725 im->graph_col[GRC_FONT],
1726 im->text_prop[TEXT_PROP_AXIS].font,
1727 im->text_prop[TEXT_PROP_AXIS].size,
1728 im->tabwidth,0.0, GFX_H_RIGHT, GFX_V_CENTER,
1729 graph_label );
1730 }
1731 }
1732 return 1;
1733 }
1736 void
1737 vertical_grid(
1738 image_desc_t *im )
1739 {
1740 int xlab_sel; /* which sort of label and grid ? */
1741 time_t ti, tilab, timajor;
1742 long factor;
1743 char graph_label[100];
1744 double X0,Y0,Y1; /* points for filled graph and more*/
1745 struct tm tm;
1747 /* the type of time grid is determined by finding
1748 the number of seconds per pixel in the graph */
1751 if(im->xlab_user.minsec == -1){
1752 factor=(im->end - im->start)/im->xsize;
1753 xlab_sel=0;
1754 while ( xlab[xlab_sel+1].minsec != -1
1755 && xlab[xlab_sel+1].minsec <= factor){ xlab_sel++; }
1756 im->xlab_user.gridtm = xlab[xlab_sel].gridtm;
1757 im->xlab_user.gridst = xlab[xlab_sel].gridst;
1758 im->xlab_user.mgridtm = xlab[xlab_sel].mgridtm;
1759 im->xlab_user.mgridst = xlab[xlab_sel].mgridst;
1760 im->xlab_user.labtm = xlab[xlab_sel].labtm;
1761 im->xlab_user.labst = xlab[xlab_sel].labst;
1762 im->xlab_user.precis = xlab[xlab_sel].precis;
1763 im->xlab_user.stst = xlab[xlab_sel].stst;
1764 }
1766 /* y coords are the same for every line ... */
1767 Y0 = im->yorigin;
1768 Y1 = im->yorigin-im->ysize;
1771 /* paint the minor grid */
1772 if (!(im->extra_flags & NOMINOR))
1773 {
1774 for(ti = find_first_time(im->start,
1775 im->xlab_user.gridtm,
1776 im->xlab_user.gridst),
1777 timajor = find_first_time(im->start,
1778 im->xlab_user.mgridtm,
1779 im->xlab_user.mgridst);
1780 ti < im->end;
1781 ti = find_next_time(ti,im->xlab_user.gridtm,im->xlab_user.gridst)
1782 ){
1783 /* are we inside the graph ? */
1784 if (ti < im->start || ti > im->end) continue;
1785 while (timajor < ti) {
1786 timajor = find_next_time(timajor,
1787 im->xlab_user.mgridtm, im->xlab_user.mgridst);
1788 }
1789 if (ti == timajor) continue; /* skip as falls on major grid line */
1790 X0 = xtr(im,ti);
1791 gfx_new_dashed_line(im->canvas,X0,Y0+1, X0,Y1-1,GRIDWIDTH,
1792 im->graph_col[GRC_GRID],
1793 im->grid_dash_on, im->grid_dash_off);
1795 }
1796 }
1798 /* paint the major grid */
1799 for(ti = find_first_time(im->start,
1800 im->xlab_user.mgridtm,
1801 im->xlab_user.mgridst);
1802 ti < im->end;
1803 ti = find_next_time(ti,im->xlab_user.mgridtm,im->xlab_user.mgridst)
1804 ){
1805 /* are we inside the graph ? */
1806 if (ti < im->start || ti > im->end) continue;
1807 X0 = xtr(im,ti);
1808 gfx_new_dashed_line(im->canvas,X0,Y0+3, X0,Y1-2,MGRIDWIDTH,
1809 im->graph_col[GRC_MGRID],
1810 im->grid_dash_on, im->grid_dash_off);
1812 }
1813 /* paint the labels below the graph */
1814 for(ti = find_first_time(im->start,
1815 im->xlab_user.labtm,
1816 im->xlab_user.labst);
1817 ti <= im->end;
1818 ti = find_next_time(ti,im->xlab_user.labtm,im->xlab_user.labst)
1819 ){
1820 tilab= ti + im->xlab_user.precis/2; /* correct time for the label */
1821 /* are we inside the graph ? */
1822 if (ti < im->start || ti > im->end) continue;
1824 #if HAVE_STRFTIME
1825 localtime_r(&tilab, &tm);
1826 strftime(graph_label,99,im->xlab_user.stst, &tm);
1827 #else
1828 # error "your libc has no strftime I guess we'll abort the exercise here."
1829 #endif
1830 gfx_new_text ( im->canvas,
1831 xtr(im,tilab), Y0+im->text_prop[TEXT_PROP_AXIS].size/1.5,
1832 im->graph_col[GRC_FONT],
1833 im->text_prop[TEXT_PROP_AXIS].font,
1834 im->text_prop[TEXT_PROP_AXIS].size,
1835 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_TOP,
1836 graph_label );
1838 }
1840 }
1843 void
1844 axis_paint(
1845 image_desc_t *im
1846 )
1847 {
1848 /* draw x and y axis */
1849 gfx_new_line ( im->canvas, im->xorigin+im->xsize,im->yorigin,
1850 im->xorigin+im->xsize,im->yorigin-im->ysize,
1851 GRIDWIDTH, im->graph_col[GRC_GRID]);
1853 gfx_new_line ( im->canvas, im->xorigin,im->yorigin-im->ysize,
1854 im->xorigin+im->xsize,im->yorigin-im->ysize,
1855 GRIDWIDTH, im->graph_col[GRC_GRID]);
1857 gfx_new_line ( im->canvas, im->xorigin-4,im->yorigin,
1858 im->xorigin+im->xsize+4,im->yorigin,
1859 MGRIDWIDTH, im->graph_col[GRC_GRID]);
1861 gfx_new_line ( im->canvas, im->xorigin,im->yorigin+4,
1862 im->xorigin,im->yorigin-im->ysize-4,
1863 MGRIDWIDTH, im->graph_col[GRC_GRID]);
1866 /* arrow for X axis direction */
1867 gfx_new_area ( im->canvas,
1868 im->xorigin+im->xsize+3, im->yorigin-3,
1869 im->xorigin+im->xsize+3, im->yorigin+4,
1870 im->xorigin+im->xsize+8, im->yorigin+0.5, /* LINEOFFSET */
1871 im->graph_col[GRC_ARROW]);
1875 }
1877 void
1878 grid_paint(image_desc_t *im)
1879 {
1880 long i;
1881 int res=0;
1882 double X0,Y0; /* points for filled graph and more*/
1883 gfx_node_t *node;
1885 /* draw 3d border */
1886 node = gfx_new_area (im->canvas, 0,im->yimg,
1887 2,im->yimg-2,
1888 2,2,im->graph_col[GRC_SHADEA]);
1889 gfx_add_point( node , im->ximg - 2, 2 );
1890 gfx_add_point( node , im->ximg, 0 );
1891 gfx_add_point( node , 0,0 );
1892 /* gfx_add_point( node , 0,im->yimg ); */
1894 node = gfx_new_area (im->canvas, 2,im->yimg-2,
1895 im->ximg-2,im->yimg-2,
1896 im->ximg - 2, 2,
1897 im->graph_col[GRC_SHADEB]);
1898 gfx_add_point( node , im->ximg,0);
1899 gfx_add_point( node , im->ximg,im->yimg);
1900 gfx_add_point( node , 0,im->yimg);
1901 /* gfx_add_point( node , 0,im->yimg ); */
1904 if (im->draw_x_grid == 1 )
1905 vertical_grid(im);
1907 if (im->draw_y_grid == 1){
1908 if(im->logarithmic){
1909 res = horizontal_log_grid(im);
1910 } else {
1911 res = draw_horizontal_grid(im);
1912 }
1914 /* dont draw horizontal grid if there is no min and max val */
1915 if (! res ) {
1916 char *nodata = "No Data found";
1917 gfx_new_text(im->canvas,im->ximg/2, (2*im->yorigin-im->ysize) / 2,
1918 im->graph_col[GRC_FONT],
1919 im->text_prop[TEXT_PROP_AXIS].font,
1920 im->text_prop[TEXT_PROP_AXIS].size,
1921 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_CENTER,
1922 nodata );
1923 }
1924 }
1926 /* yaxis description */
1927 /* if (im->canvas->imgformat != IF_PNG) {*/
1928 if (1) {
1929 gfx_new_text( im->canvas,
1930 7, (im->yorigin - im->ysize/2),
1931 im->graph_col[GRC_FONT],
1932 im->text_prop[TEXT_PROP_AXIS].font,
1933 im->text_prop[TEXT_PROP_AXIS].size, im->tabwidth,
1934 RRDGRAPH_YLEGEND_ANGLE,
1935 GFX_H_LEFT, GFX_V_CENTER,
1936 im->ylegend);
1937 } else {
1938 /* horrible hack until we can actually print vertically */
1939 {
1940 int n;
1941 char s[2];
1942 for (n=0;n< (int)strlen(im->ylegend);n++) {
1943 s[0]=im->ylegend[n];
1944 s[1]='\0';
1945 gfx_new_text(im->canvas,7,im->text_prop[TEXT_PROP_AXIS].size*(n+1),
1946 im->graph_col[GRC_FONT],
1947 im->text_prop[TEXT_PROP_AXIS].font,
1948 im->text_prop[TEXT_PROP_AXIS].size, im->tabwidth, 270.0,
1949 GFX_H_CENTER, GFX_V_CENTER,
1950 s);
1951 }
1952 }
1953 }
1955 /* graph title */
1956 gfx_new_text( im->canvas,
1957 im->ximg/2, im->text_prop[TEXT_PROP_TITLE].size,
1958 im->graph_col[GRC_FONT],
1959 im->text_prop[TEXT_PROP_TITLE].font,
1960 im->text_prop[TEXT_PROP_TITLE].size, im->tabwidth, 0.0,
1961 GFX_H_CENTER, GFX_V_CENTER,
1962 im->title);
1964 /* graph labels */
1965 if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
1966 for(i=0;i<im->gdes_c;i++){
1967 if(im->gdes[i].legend[0] =='\0')
1968 continue;
1970 /* im->gdes[i].leg_y is the bottom of the legend */
1971 X0 = im->gdes[i].leg_x;
1972 Y0 = im->gdes[i].leg_y;
1973 /* Box needed? */
1974 if ( im->gdes[i].gf != GF_GPRINT
1975 && im->gdes[i].gf != GF_COMMENT) {
1976 int boxH, boxV;
1978 boxH = gfx_get_text_width(im->canvas, 0,
1979 im->text_prop[TEXT_PROP_AXIS].font,
1980 im->text_prop[TEXT_PROP_AXIS].size,
1981 im->tabwidth,"M", 0) * 1.25;
1982 boxV = boxH;
1984 node = gfx_new_area(im->canvas,
1985 X0,Y0-boxV,
1986 X0,Y0,
1987 X0+boxH,Y0,
1988 im->gdes[i].col);
1989 gfx_add_point ( node, X0+boxH, Y0-boxV );
1990 node = gfx_new_line(im->canvas,
1991 X0,Y0-boxV, X0,Y0,
1992 1,0x000000FF);
1993 gfx_add_point(node,X0+boxH,Y0);
1994 gfx_add_point(node,X0+boxH,Y0-boxV);
1995 gfx_close_path(node);
1996 X0 += boxH / 1.25 * 2;
1997 }
1998 gfx_new_text ( im->canvas, X0, Y0,
1999 im->graph_col[GRC_FONT],
2000 im->text_prop[TEXT_PROP_AXIS].font,
2001 im->text_prop[TEXT_PROP_AXIS].size,
2002 im->tabwidth,0.0, GFX_H_LEFT, GFX_V_BOTTOM,
2003 im->gdes[i].legend );
2004 }
2005 }
2006 }
2009 /*****************************************************
2010 * lazy check make sure we rely need to create this graph
2011 *****************************************************/
2013 int lazy_check(image_desc_t *im){
2014 FILE *fd = NULL;
2015 int size = 1;
2016 struct stat imgstat;
2018 if (im->lazy == 0) return 0; /* no lazy option */
2019 if (stat(im->graphfile,&imgstat) != 0)
2020 return 0; /* can't stat */
2021 /* one pixel in the existing graph is more then what we would
2022 change here ... */
2023 if (time(NULL) - imgstat.st_mtime >
2024 (im->end - im->start) / im->xsize)
2025 return 0;
2026 if ((fd = fopen(im->graphfile,"rb")) == NULL)
2027 return 0; /* the file does not exist */
2028 switch (im->canvas->imgformat) {
2029 case IF_PNG:
2030 size = PngSize(fd,&(im->ximg),&(im->yimg));
2031 break;
2032 default:
2033 size = 1;
2034 }
2035 fclose(fd);
2036 return size;
2037 }
2039 void
2040 pie_part(image_desc_t *im, gfx_color_t color,
2041 double PieCenterX, double PieCenterY, double Radius,
2042 double startangle, double endangle)
2043 {
2044 gfx_node_t *node;
2045 double angle;
2046 double step=M_PI/50; /* Number of iterations for the circle;
2047 ** 10 is definitely too low, more than
2048 ** 50 seems to be overkill
2049 */
2051 /* Strange but true: we have to work clockwise or else
2052 ** anti aliasing nor transparency don't work.
2053 **
2054 ** This test is here to make sure we do it right, also
2055 ** this makes the for...next loop more easy to implement.
2056 ** The return will occur if the user enters a negative number
2057 ** (which shouldn't be done according to the specs) or if the
2058 ** programmers do something wrong (which, as we all know, never
2059 ** happens anyway :)
2060 */
2061 if (endangle<startangle) return;
2063 /* Hidden feature: Radius decreases each full circle */
2064 angle=startangle;
2065 while (angle>=2*M_PI) {
2066 angle -= 2*M_PI;
2067 Radius *= 0.8;
2068 }
2070 node=gfx_new_area(im->canvas,
2071 PieCenterX+sin(startangle)*Radius,
2072 PieCenterY-cos(startangle)*Radius,
2073 PieCenterX,
2074 PieCenterY,
2075 PieCenterX+sin(endangle)*Radius,
2076 PieCenterY-cos(endangle)*Radius,
2077 color);
2078 for (angle=endangle;angle-startangle>=step;angle-=step) {
2079 gfx_add_point(node,
2080 PieCenterX+sin(angle)*Radius,
2081 PieCenterY-cos(angle)*Radius );
2082 }
2083 }
2085 int
2086 graph_size_location(image_desc_t *im, int elements, int piechart )
2087 {
2088 /* The actual size of the image to draw is determined from
2089 ** several sources. The size given on the command line is
2090 ** the graph area but we need more as we have to draw labels
2091 ** and other things outside the graph area
2092 */
2094 /* +-+-------------------------------------------+
2095 ** |l|.................title.....................|
2096 ** |e+--+-------------------------------+--------+
2097 ** |b| b| | |
2098 ** |a| a| | pie |
2099 ** |l| l| main graph area | chart |
2100 ** |.| .| | area |
2101 ** |t| y| | |
2102 ** |r+--+-------------------------------+--------+
2103 ** |e| | x-axis labels | |
2104 ** |v+--+-------------------------------+--------+
2105 ** | |..............legends......................|
2106 ** +-+-------------------------------------------+
2107 */
2108 int Xvertical=0, Yvertical=0,
2109 Xtitle =0, Ytitle =0,
2110 Xylabel =0, Yylabel =0,
2111 Xmain =0, Ymain =0,
2112 Xpie =0, Ypie =0,
2113 Xxlabel =0, Yxlabel =0,
2114 #if 0
2115 Xlegend =0, Ylegend =0,
2116 #endif
2117 Xspacing =10, Yspacing =10;
2119 if (im->extra_flags & ONLY_GRAPH) {
2120 if ( im->ysize > 32 ) {
2121 rrd_set_error("height > 32 is not possible with --only-graph option");
2122 return -1;
2123 }
2124 Xspacing =0;
2125 Yspacing =0;
2126 } else {
2127 if (im->ylegend[0] != '\0') {
2128 Xvertical = im->text_prop[TEXT_PROP_LEGEND].size *2;
2129 Yvertical = im->text_prop[TEXT_PROP_LEGEND].size * (strlen(im->ylegend)+1);
2130 }
2131 }
2133 if (im->title[0] != '\0') {
2134 /* The title is placed "inbetween" two text lines so it
2135 ** automatically has some vertical spacing. The horizontal
2136 ** spacing is added here, on each side.
2137 */
2138 Xtitle = gfx_get_text_width(im->canvas, 0,
2139 im->text_prop[TEXT_PROP_TITLE].font,
2140 im->text_prop[TEXT_PROP_TITLE].size,
2141 im->tabwidth,
2142 im->title, 0) + 2*Xspacing;
2143 Ytitle = im->text_prop[TEXT_PROP_TITLE].size*2;
2144 }
2146 if (elements) {
2147 Xmain=im->xsize;
2148 Ymain=im->ysize;
2149 if (im->draw_x_grid) {
2150 Xxlabel=Xmain;
2151 Yxlabel=im->text_prop[TEXT_PROP_LEGEND].size *2;
2152 }
2153 if (im->draw_y_grid) {
2154 Xylabel=im->text_prop[TEXT_PROP_LEGEND].size *6;
2155 Yylabel=Ymain;
2156 }
2157 }
2159 if (piechart) {
2160 im->piesize=im->xsize<im->ysize?im->xsize:im->ysize;
2161 Xpie=im->piesize;
2162 Ypie=im->piesize;
2163 }
2165 /* Now calculate the total size. Insert some spacing where
2166 desired. im->xorigin and im->yorigin need to correspond
2167 with the lower left corner of the main graph area or, if
2168 this one is not set, the imaginary box surrounding the
2169 pie chart area. */
2171 /* The legend width cannot yet be determined, as a result we
2172 ** have problems adjusting the image to it. For now, we just
2173 ** forget about it at all; the legend will have to fit in the
2174 ** size already allocated.
2175 */
2176 im->ximg = Xmain;
2178 if ( !(im->extra_flags & ONLY_GRAPH) ) {
2179 im->ximg = Xylabel + Xmain + Xpie + Xspacing;
2180 }
2182 if (Xmain) im->ximg += Xspacing;
2183 if (Xpie) im->ximg += Xspacing;
2185 if (im->extra_flags & ONLY_GRAPH) {
2186 im->xorigin = 0;
2187 } else {
2188 im->xorigin = Xspacing + Xylabel;
2189 }
2191 if (Xtitle > im->ximg) im->ximg = Xtitle;
2192 if (Xvertical) {
2193 im->ximg += Xvertical;
2194 im->xorigin += Xvertical;
2195 }
2196 xtr(im,0);
2198 /* The vertical size is interesting... we need to compare
2199 ** the sum of {Ytitle, Ymain, Yxlabel, Ylegend} with Yvertical
2200 ** however we need to know {Ytitle+Ymain+Yxlabel} in order to
2201 ** start even thinking about Ylegend.
2202 **
2203 ** Do it in three portions: First calculate the inner part,
2204 ** then do the legend, then adjust the total height of the img.
2205 */
2207 /* reserve space for main and/or pie */
2209 if (im->extra_flags & ONLY_GRAPH) {
2210 im->yimg = Ymain;
2211 } else {
2212 im->yimg = Ymain + Yxlabel;
2213 }
2215 if (im->yimg < Ypie) im->yimg = Ypie;
2217 if (im->extra_flags & ONLY_GRAPH) {
2218 im->yorigin = im->yimg;
2219 } else {
2220 im->yorigin = im->yimg - Yxlabel;
2221 }
2223 /* reserve space for the title *or* some padding above the graph */
2224 if (Ytitle) {
2225 im->yimg += Ytitle;
2226 im->yorigin += Ytitle;
2227 } else {
2228 im->yimg += Yspacing;
2229 im->yorigin += Yspacing;
2230 }
2231 /* reserve space for padding below the graph */
2232 im->yimg += Yspacing;
2233 ytr(im,DNAN);
2235 /* Determine where to place the legends onto the image.
2236 ** Adjust im->yimg to match the space requirements.
2237 */
2238 if(leg_place(im)==-1)
2239 return -1;
2241 /* last of three steps: check total height of image */
2242 if (im->yimg < Yvertical) im->yimg = Yvertical;
2244 #if 0
2245 if (Xlegend > im->ximg) {
2246 im->ximg = Xlegend;
2247 /* reposition Pie */
2248 }
2249 #endif
2251 /* The pie is placed in the upper right hand corner,
2252 ** just below the title (if any) and with sufficient
2253 ** padding.
2254 */
2255 if (elements) {
2256 im->pie_x = im->ximg - Xspacing - Xpie/2;
2257 im->pie_y = im->yorigin-Ymain+Ypie/2;
2258 } else {
2259 im->pie_x = im->ximg/2;
2260 im->pie_y = im->yorigin-Ypie/2;
2261 }
2263 return 0;
2264 }
2266 /* draw that picture thing ... */
2267 int
2268 graph_paint(image_desc_t *im, char ***calcpr)
2269 {
2270 int i,ii;
2271 int lazy = lazy_check(im);
2272 int piechart = 0;
2273 double PieStart=0.0;
2274 FILE *fo;
2275 gfx_node_t *node;
2277 double areazero = 0.0;
2278 enum gf_en stack_gf = GF_PRINT;
2279 graph_desc_t *lastgdes = NULL;
2281 /* if we are lazy and there is nothing to PRINT ... quit now */
2282 if (lazy && im->prt_c==0) return 0;
2284 /* pull the data from the rrd files ... */
2286 if(data_fetch(im)==-1)
2287 return -1;
2289 /* evaluate VDEF and CDEF operations ... */
2290 if(data_calc(im)==-1)
2291 return -1;
2293 /* check if we need to draw a piechart */
2294 for(i=0;i<im->gdes_c;i++){
2295 if (im->gdes[i].gf == GF_PART) {
2296 piechart=1;
2297 break;
2298 }
2299 }
2301 /* calculate and PRINT and GPRINT definitions. We have to do it at
2302 * this point because it will affect the length of the legends
2303 * if there are no graph elements we stop here ...
2304 * if we are lazy, try to quit ...
2305 */
2306 i=print_calc(im,calcpr);
2307 if(i<0) return -1;
2308 if(((i==0)&&(piechart==0)) || lazy) return 0;
2310 /* If there's only the pie chart to draw, signal this */
2311 if (i==0) piechart=2;
2313 /* get actual drawing data and find min and max values*/
2314 if(data_proc(im)==-1)
2315 return -1;
2317 if(!im->logarithmic){si_unit(im);} /* identify si magnitude Kilo, Mega Giga ? */
2319 if(!im->rigid && ! im->logarithmic)
2320 expand_range(im); /* make sure the upper and lower limit are
2321 sensible values */
2323 if (!calc_horizontal_grid(im))
2324 return -1;
2326 if (im->gridfit)
2327 apply_gridfit(im);
2330 /**************************************************************
2331 *** Calculating sizes and locations became a bit confusing ***
2332 *** so I moved this into a separate function. ***
2333 **************************************************************/
2334 if(graph_size_location(im,i,piechart)==-1)
2335 return -1;
2337 /* the actual graph is created by going through the individual
2338 graph elements and then drawing them */
2340 node=gfx_new_area ( im->canvas,
2341 0, 0,
2342 im->ximg, 0,
2343 im->ximg, im->yimg,
2344 im->graph_col[GRC_BACK]);
2346 gfx_add_point(node,0, im->yimg);
2348 if (piechart != 2) {
2349 node=gfx_new_area ( im->canvas,
2350 im->xorigin, im->yorigin,
2351 im->xorigin + im->xsize, im->yorigin,
2352 im->xorigin + im->xsize, im->yorigin-im->ysize,
2353 im->graph_col[GRC_CANVAS]);
2355 gfx_add_point(node,im->xorigin, im->yorigin - im->ysize);
2357 if (im->minval > 0.0)
2358 areazero = im->minval;
2359 if (im->maxval < 0.0)
2360 areazero = im->maxval;
2361 if( !(im->extra_flags & ONLY_GRAPH) )
2362 axis_paint(im);
2363 }
2365 if (piechart) {
2366 pie_part(im,im->graph_col[GRC_CANVAS],im->pie_x,im->pie_y,im->piesize*0.5,0,2*M_PI);
2367 }
2369 for(i=0;i<im->gdes_c;i++){
2370 switch(im->gdes[i].gf){
2371 case GF_CDEF:
2372 case GF_VDEF:
2373 case GF_DEF:
2374 case GF_PRINT:
2375 case GF_GPRINT:
2376 case GF_COMMENT:
2377 case GF_HRULE:
2378 case GF_VRULE:
2379 case GF_XPORT:
2380 case GF_SHIFT:
2381 break;
2382 case GF_TICK:
2383 for (ii = 0; ii < im->xsize; ii++)
2384 {
2385 if (!isnan(im->gdes[i].p_data[ii]) &&
2386 im->gdes[i].p_data[ii] > 0.0)
2387 {
2388 /* generate a tick */
2389 gfx_new_line(im->canvas, im -> xorigin + ii,
2390 im -> yorigin - (im -> gdes[i].yrule * im -> ysize),
2391 im -> xorigin + ii,
2392 im -> yorigin,
2393 1.0,
2394 im -> gdes[i].col );
2395 }
2396 }
2397 break;
2398 case GF_LINE:
2399 case GF_AREA:
2400 stack_gf = im->gdes[i].gf;
2401 case GF_STACK:
2402 /* fix data points at oo and -oo */
2403 for(ii=0;ii<im->xsize;ii++){
2404 if (isinf(im->gdes[i].p_data[ii])){
2405 if (im->gdes[i].p_data[ii] > 0) {
2406 im->gdes[i].p_data[ii] = im->maxval ;
2407 } else {
2408 im->gdes[i].p_data[ii] = im->minval ;
2409 }
2411 }
2412 } /* for */
2414 if (im->gdes[i].col != 0x0){
2415 /* GF_LINE and friend */
2416 if(stack_gf == GF_LINE ){
2417 node = NULL;
2418 for(ii=1;ii<im->xsize;ii++){
2419 if ( ! isnan(im->gdes[i].p_data[ii-1])
2420 && ! isnan(im->gdes[i].p_data[ii])){
2421 if (node == NULL){
2422 node = gfx_new_line(im->canvas,
2423 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii-1]),
2424 ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]),
2425 im->gdes[i].linewidth,
2426 im->gdes[i].col);
2427 } else {
2428 gfx_add_point(node,ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]));
2429 }
2430 } else {
2431 node = NULL;
2432 }
2433 }
2434 } else {
2435 int area_start=-1;
2436 node = NULL;
2437 for(ii=1;ii<im->xsize;ii++){
2438 /* open an area */
2439 if ( ! isnan(im->gdes[i].p_data[ii-1])
2440 && ! isnan(im->gdes[i].p_data[ii])){
2441 if (node == NULL){
2442 float ybase = 0.0;
2443 /*
2444 if (im->gdes[i].gf == GF_STACK) {
2445 */
2446 if ( (im->gdes[i].gf == GF_STACK)
2447 || (im->gdes[i].stack) ) {
2449 ybase = ytr(im,lastgdes->p_data[ii-1]);
2450 } else {
2451 ybase = ytr(im,areazero);
2452 }
2453 area_start = ii-1;
2454 node = gfx_new_area(im->canvas,
2455 ii-1+im->xorigin,ybase,
2456 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii-1]),
2457 ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]),
2458 im->gdes[i].col
2459 );
2460 } else {
2461 gfx_add_point(node,ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]));
2462 }
2463 }
2465 if ( node != NULL && (ii+1==im->xsize || isnan(im->gdes[i].p_data[ii]) )){
2466 /* GF_AREA STACK type*/
2467 /*
2468 if (im->gdes[i].gf == GF_STACK ) {
2469 */
2470 if ( (im->gdes[i].gf == GF_STACK)
2471 || (im->gdes[i].stack) ) {
2472 int iii;
2473 for (iii=ii-1;iii>area_start;iii--){
2474 gfx_add_point(node,iii+im->xorigin,ytr(im,lastgdes->p_data[iii]));
2475 }
2476 } else {
2477 gfx_add_point(node,ii+im->xorigin,ytr(im,areazero));
2478 };
2479 node=NULL;
2480 };
2481 }
2482 } /* else GF_LINE */
2483 } /* if color != 0x0 */
2484 /* make sure we do not run into trouble when stacking on NaN */
2485 for(ii=0;ii<im->xsize;ii++){
2486 if (isnan(im->gdes[i].p_data[ii])) {
2487 if (lastgdes && (im->gdes[i].gf == GF_STACK)) {
2488 im->gdes[i].p_data[ii] = lastgdes->p_data[ii];
2489 } else {
2490 im->gdes[i].p_data[ii] = ytr(im,areazero);
2491 }
2492 }
2493 }
2494 lastgdes = &(im->gdes[i]);
2495 break;
2496 case GF_PART:
2497 if(isnan(im->gdes[i].yrule)) /* fetch variable */
2498 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2500 if (finite(im->gdes[i].yrule)) { /* even the fetched var can be NaN */
2501 pie_part(im,im->gdes[i].col,
2502 im->pie_x,im->pie_y,im->piesize*0.4,
2503 M_PI*2.0*PieStart/100.0,
2504 M_PI*2.0*(PieStart+im->gdes[i].yrule)/100.0);
2505 PieStart += im->gdes[i].yrule;
2506 }
2507 break;
2508 } /* switch */
2509 }
2510 if (piechart==2) {
2511 im->draw_x_grid=0;
2512 im->draw_y_grid=0;
2513 }
2514 /* grid_paint also does the text */
2515 if( !(im->extra_flags & ONLY_GRAPH) )
2516 grid_paint(im);
2518 /* the RULES are the last thing to paint ... */
2519 for(i=0;i<im->gdes_c;i++){
2521 switch(im->gdes[i].gf){
2522 case GF_HRULE:
2523 if(isnan(im->gdes[i].yrule)) { /* fetch variable */
2524 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2525 };
2526 if(im->gdes[i].yrule >= im->minval
2527 && im->gdes[i].yrule <= im->maxval)
2528 gfx_new_line(im->canvas,
2529 im->xorigin,ytr(im,im->gdes[i].yrule),
2530 im->xorigin+im->xsize,ytr(im,im->gdes[i].yrule),
2531 1.0,im->gdes[i].col);
2532 break;
2533 case GF_VRULE:
2534 if(im->gdes[i].xrule == 0) { /* fetch variable */
2535 im->gdes[i].xrule = im->gdes[im->gdes[i].vidx].vf.when;
2536 };
2537 if(im->gdes[i].xrule >= im->start
2538 && im->gdes[i].xrule <= im->end)
2539 gfx_new_line(im->canvas,
2540 xtr(im,im->gdes[i].xrule),im->yorigin,
2541 xtr(im,im->gdes[i].xrule),im->yorigin-im->ysize,
2542 1.0,im->gdes[i].col);
2543 break;
2544 default:
2545 break;
2546 }
2547 }
2550 if (strcmp(im->graphfile,"-")==0) {
2551 fo = im->graphhandle ? im->graphhandle : stdout;
2552 #ifdef WIN32
2553 /* Change translation mode for stdout to BINARY */
2554 _setmode( _fileno( fo ), O_BINARY );
2555 #endif
2556 } else {
2557 if ((fo = fopen(im->graphfile,"wb")) == NULL) {
2558 rrd_set_error("Opening '%s' for write: %s",im->graphfile,
2559 rrd_strerror(errno));
2560 return (-1);
2561 }
2562 }
2563 gfx_render (im->canvas,im->ximg,im->yimg,0x0,fo);
2564 if (strcmp(im->graphfile,"-") != 0)
2565 fclose(fo);
2566 return 0;
2567 }
2570 /*****************************************************
2571 * graph stuff
2572 *****************************************************/
2574 int
2575 gdes_alloc(image_desc_t *im){
2577 im->gdes_c++;
2578 if ((im->gdes = (graph_desc_t *) rrd_realloc(im->gdes, (im->gdes_c)
2579 * sizeof(graph_desc_t)))==NULL){
2580 rrd_set_error("realloc graph_descs");
2581 return -1;
2582 }
2585 im->gdes[im->gdes_c-1].step=im->step;
2586 im->gdes[im->gdes_c-1].stack=0;
2587 im->gdes[im->gdes_c-1].debug=0;
2588 im->gdes[im->gdes_c-1].start=im->start;
2589 im->gdes[im->gdes_c-1].end=im->end;
2590 im->gdes[im->gdes_c-1].vname[0]='\0';
2591 im->gdes[im->gdes_c-1].data=NULL;
2592 im->gdes[im->gdes_c-1].ds_namv=NULL;
2593 im->gdes[im->gdes_c-1].data_first=0;
2594 im->gdes[im->gdes_c-1].p_data=NULL;
2595 im->gdes[im->gdes_c-1].rpnp=NULL;
2596 im->gdes[im->gdes_c-1].shift=0;
2597 im->gdes[im->gdes_c-1].col = 0x0;
2598 im->gdes[im->gdes_c-1].legend[0]='\0';
2599 im->gdes[im->gdes_c-1].rrd[0]='\0';
2600 im->gdes[im->gdes_c-1].ds=-1;
2601 im->gdes[im->gdes_c-1].p_data=NULL;
2602 im->gdes[im->gdes_c-1].yrule=DNAN;
2603 im->gdes[im->gdes_c-1].xrule=0;
2604 return 0;
2605 }
2607 /* copies input untill the first unescaped colon is found
2608 or until input ends. backslashes have to be escaped as well */
2609 int
2610 scan_for_col(char *input, int len, char *output)
2611 {
2612 int inp,outp=0;
2613 for (inp=0;
2614 inp < len &&
2615 input[inp] != ':' &&
2616 input[inp] != '\0';
2617 inp++){
2618 if (input[inp] == '\\' &&
2619 input[inp+1] != '\0' &&
2620 (input[inp+1] == '\\' ||
2621 input[inp+1] == ':')){
2622 output[outp++] = input[++inp];
2623 }
2624 else {
2625 output[outp++] = input[inp];
2626 }
2627 }
2628 output[outp] = '\0';
2629 return inp;
2630 }
2631 /* Some surgery done on this function, it became ridiculously big.
2632 ** Things moved:
2633 ** - initializing now in rrd_graph_init()
2634 ** - options parsing now in rrd_graph_options()
2635 ** - script parsing now in rrd_graph_script()
2636 */
2637 int
2638 rrd_graph(int argc, char **argv, char ***prdata, int *xsize, int *ysize, FILE *stream)
2639 {
2640 image_desc_t im;
2642 rrd_graph_init(&im);
2643 im.graphhandle = stream;
2645 rrd_graph_options(argc,argv,&im);
2646 if (rrd_test_error()) {
2647 im_free(&im);
2648 return -1;
2649 }
2651 if (strlen(argv[optind])>=MAXPATH) {
2652 rrd_set_error("filename (including path) too long");
2653 im_free(&im);
2654 return -1;
2655 }
2656 strncpy(im.graphfile,argv[optind],MAXPATH-1);
2657 im.graphfile[MAXPATH-1]='\0';
2659 rrd_graph_script(argc,argv,&im,1);
2660 if (rrd_test_error()) {
2661 im_free(&im);
2662 return -1;
2663 }
2665 /* Everything is now read and the actual work can start */
2667 (*prdata)=NULL;
2668 if (graph_paint(&im,prdata)==-1){
2669 im_free(&im);
2670 return -1;
2671 }
2673 /* The image is generated and needs to be output.
2674 ** Also, if needed, print a line with information about the image.
2675 */
2677 *xsize=im.ximg;
2678 *ysize=im.yimg;
2679 if (im.imginfo) {
2680 char *filename;
2681 if (!(*prdata)) {
2682 /* maybe prdata is not allocated yet ... lets do it now */
2683 if ((*prdata = calloc(2,sizeof(char *)))==NULL) {
2684 rrd_set_error("malloc imginfo");
2685 return -1;
2686 };
2687 }
2688 if(((*prdata)[0] = malloc((strlen(im.imginfo)+200+strlen(im.graphfile))*sizeof(char)))
2689 ==NULL){
2690 rrd_set_error("malloc imginfo");
2691 return -1;
2692 }
2693 filename=im.graphfile+strlen(im.graphfile);
2694 while(filename > im.graphfile) {
2695 if (*(filename-1)=='/' || *(filename-1)=='\\' ) break;
2696 filename--;
2697 }
2699 sprintf((*prdata)[0],im.imginfo,filename,(long)(im.canvas->zoom*im.ximg),(long)(im.canvas->zoom*im.yimg));
2700 }
2701 im_free(&im);
2702 return 0;
2703 }
2705 void
2706 rrd_graph_init(image_desc_t *im)
2707 {
2708 unsigned int i;
2710 #ifdef HAVE_TZSET
2711 tzset();
2712 #endif
2713 #ifdef HAVE_SETLOCALE
2714 setlocale(LC_TIME,"");
2715 #endif
2717 im->xlab_user.minsec = -1;
2718 im->ximg=0;
2719 im->yimg=0;
2720 im->xsize = 400;
2721 im->ysize = 100;
2722 im->step = 0;
2723 im->ylegend[0] = '\0';
2724 im->title[0] = '\0';
2725 im->minval = DNAN;
2726 im->maxval = DNAN;
2727 im->unitsexponent= 9999;
2728 im->extra_flags= 0;
2729 im->rigid = 0;
2730 im->gridfit = 1;
2731 im->imginfo = NULL;
2732 im->lazy = 0;
2733 im->logarithmic = 0;
2734 im->ygridstep = DNAN;
2735 im->draw_x_grid = 1;
2736 im->draw_y_grid = 1;
2737 im->base = 1000;
2738 im->prt_c = 0;
2739 im->gdes_c = 0;
2740 im->gdes = NULL;
2741 im->canvas = gfx_new_canvas();
2742 im->grid_dash_on = 1;
2743 im->grid_dash_off = 1;
2745 for(i=0;i<DIM(graph_col);i++)
2746 im->graph_col[i]=graph_col[i];
2747 #ifdef WIN32
2748 {
2749 char *windir;
2750 windir = getenv("windir");
2751 /* %windir% is something like D:\windows or C:\winnt */
2752 if (windir != NULL) {
2753 strcpy(rrd_win_default_font,windir);
2754 strcat(rrd_win_default_font,"\\fonts\\cour.ttf");
2755 for(i=0;i<DIM(text_prop);i++)
2756 text_prop[i].font = rrd_win_default_font;
2757 }
2758 }
2759 #endif
2760 for(i=0;i<DIM(text_prop);i++){
2761 im->text_prop[i].size = text_prop[i].size;
2762 im->text_prop[i].font = text_prop[i].font;
2763 }
2764 }
2766 void
2767 rrd_graph_options(int argc, char *argv[],image_desc_t *im)
2768 {
2769 int stroff;
2770 char *parsetime_error = NULL;
2771 char scan_gtm[12],scan_mtm[12],scan_ltm[12],col_nam[12];
2772 time_t start_tmp=0,end_tmp=0;
2773 long long_tmp;
2774 struct rrd_time_value start_tv, end_tv;
2775 gfx_color_t color;
2777 parsetime("end-24h", &start_tv);
2778 parsetime("now", &end_tv);
2780 while (1){
2781 static struct option long_options[] =
2782 {
2783 {"start", required_argument, 0, 's'},
2784 {"end", required_argument, 0, 'e'},
2785 {"x-grid", required_argument, 0, 'x'},
2786 {"y-grid", required_argument, 0, 'y'},
2787 {"vertical-label",required_argument,0,'v'},
2788 {"width", required_argument, 0, 'w'},
2789 {"height", required_argument, 0, 'h'},
2790 {"interlaced", no_argument, 0, 'i'},
2791 {"upper-limit",required_argument, 0, 'u'},
2792 {"lower-limit",required_argument, 0, 'l'},
2793 {"rigid", no_argument, 0, 'r'},
2794 {"base", required_argument, 0, 'b'},
2795 {"logarithmic",no_argument, 0, 'o'},
2796 {"color", required_argument, 0, 'c'},
2797 {"font", required_argument, 0, 'n'},
2798 {"title", required_argument, 0, 't'},
2799 {"imginfo", required_argument, 0, 'f'},
2800 {"imgformat", required_argument, 0, 'a'},
2801 {"lazy", no_argument, 0, 'z'},
2802 {"zoom", required_argument, 0, 'm'},
2803 {"no-legend", no_argument, 0, 'g'},
2804 {"force-rules-legend",no_argument,0, 'F'},
2805 {"only-graph", no_argument, 0, 'j'},
2806 {"alt-y-grid", no_argument, 0, 'Y'},
2807 {"no-minor", no_argument, 0, 'I'},
2808 {"alt-autoscale", no_argument, 0, 'A'},
2809 {"alt-autoscale-max", no_argument, 0, 'M'},
2810 {"units-exponent",required_argument, 0, 'X'},
2811 {"step", required_argument, 0, 'S'},
2812 {"no-gridfit", no_argument, 0, 'N'},
2813 {0,0,0,0}};
2814 int option_index = 0;
2815 int opt;
2818 opt = getopt_long(argc, argv,
2819 "s:e:x:y:v:w:h:iu:l:rb:oc:n:m:t:f:a:I:zgjFYAMX:S:N",
2820 long_options, &option_index);
2822 if (opt == EOF)
2823 break;
2825 switch(opt) {
2826 case 'I':
2827 im->extra_flags |= NOMINOR;
2828 break;
2829 case 'Y':
2830 im->extra_flags |= ALTYGRID;
2831 break;
2832 case 'A':
2833 im->extra_flags |= ALTAUTOSCALE;
2834 break;
2835 case 'M':
2836 im->extra_flags |= ALTAUTOSCALE_MAX;
2837 break;
2838 case 'j':
2839 im->extra_flags |= ONLY_GRAPH;
2840 break;
2841 case 'g':
2842 im->extra_flags |= NOLEGEND;
2843 break;
2844 case 'F':
2845 im->extra_flags |= FORCE_RULES_LEGEND;
2846 break;
2847 case 'X':
2848 im->unitsexponent = atoi(optarg);
2849 break;
2850 case 'S':
2851 im->step = atoi(optarg);
2852 break;
2853 case 262:
2854 im->gridfit = 0;
2855 break;
2856 case 's':
2857 if ((parsetime_error = parsetime(optarg, &start_tv))) {
2858 rrd_set_error( "start time: %s", parsetime_error );
2859 return;
2860 }
2861 break;
2862 case 'e':
2863 if ((parsetime_error = parsetime(optarg, &end_tv))) {
2864 rrd_set_error( "end time: %s", parsetime_error );
2865 return;
2866 }
2867 break;
2868 case 'x':
2869 if(strcmp(optarg,"none") == 0){
2870 im->draw_x_grid=0;
2871 break;
2872 };
2874 if(sscanf(optarg,
2875 "%10[A-Z]:%ld:%10[A-Z]:%ld:%10[A-Z]:%ld:%ld:%n",
2876 scan_gtm,
2877 &im->xlab_user.gridst,
2878 scan_mtm,
2879 &im->xlab_user.mgridst,
2880 scan_ltm,
2881 &im->xlab_user.labst,
2882 &im->xlab_user.precis,
2883 &stroff) == 7 && stroff != 0){
2884 strncpy(im->xlab_form, optarg+stroff, sizeof(im->xlab_form) - 1);
2885 if((int)(im->xlab_user.gridtm = tmt_conv(scan_gtm)) == -1){
2886 rrd_set_error("unknown keyword %s",scan_gtm);
2887 return;
2888 } else if ((int)(im->xlab_user.mgridtm = tmt_conv(scan_mtm)) == -1){
2889 rrd_set_error("unknown keyword %s",scan_mtm);
2890 return;
2891 } else if ((int)(im->xlab_user.labtm = tmt_conv(scan_ltm)) == -1){
2892 rrd_set_error("unknown keyword %s",scan_ltm);
2893 return;
2894 }
2895 im->xlab_user.minsec = 1;
2896 im->xlab_user.stst = im->xlab_form;
2897 } else {
2898 rrd_set_error("invalid x-grid format");
2899 return;
2900 }
2901 break;
2902 case 'y':
2904 if(strcmp(optarg,"none") == 0){
2905 im->draw_y_grid=0;
2906 break;
2907 };
2909 if(sscanf(optarg,
2910 "%lf:%d",
2911 &im->ygridstep,
2912 &im->ylabfact) == 2) {
2913 if(im->ygridstep<=0){
2914 rrd_set_error("grid step must be > 0");
2915 return;
2916 } else if (im->ylabfact < 1){
2917 rrd_set_error("label factor must be > 0");
2918 return;
2919 }
2920 } else {
2921 rrd_set_error("invalid y-grid format");
2922 return;
2923 }
2924 break;
2925 case 'v':
2926 strncpy(im->ylegend,optarg,150);
2927 im->ylegend[150]='\0';
2928 break;
2929 case 'u':
2930 im->maxval = atof(optarg);
2931 break;
2932 case 'l':
2933 im->minval = atof(optarg);
2934 break;
2935 case 'b':
2936 im->base = atol(optarg);
2937 if(im->base != 1024 && im->base != 1000 ){
2938 rrd_set_error("the only sensible value for base apart from 1000 is 1024");
2939 return;
2940 }
2941 break;
2942 case 'w':
2943 long_tmp = atol(optarg);
2944 if (long_tmp < 10) {
2945 rrd_set_error("width below 10 pixels");
2946 return;
2947 }
2948 im->xsize = long_tmp;
2949 break;
2950 case 'h':
2951 long_tmp = atol(optarg);
2952 if (long_tmp < 10) {
2953 rrd_set_error("height below 10 pixels");
2954 return;
2955 }
2956 im->ysize = long_tmp;
2957 break;
2958 case 'i':
2959 im->canvas->interlaced = 1;
2960 break;
2961 case 'r':
2962 im->rigid = 1;
2963 break;
2964 case 'f':
2965 im->imginfo = optarg;
2966 break;
2967 case 'a':
2968 if((int)(im->canvas->imgformat = if_conv(optarg)) == -1) {
2969 rrd_set_error("unsupported graphics format '%s'",optarg);
2970 return;
2971 }
2972 break;
2973 case 'z':
2974 im->lazy = 1;
2975 break;
2976 case 'o':
2977 im->logarithmic = 1;
2978 if (isnan(im->minval))
2979 im->minval=1;
2980 break;
2981 case 'c':
2982 if(sscanf(optarg,
2983 "%10[A-Z]#%8lx",
2984 col_nam,&color) == 2){
2985 int ci;
2986 if((ci=grc_conv(col_nam)) != -1){
2987 im->graph_col[ci]=color;
2988 } else {
2989 rrd_set_error("invalid color name '%s'",col_nam);
2990 }
2991 } else {
2992 rrd_set_error("invalid color def format");
2993 return;
2994 }
2995 break;
2996 case 'n':{
2997 /* originally this used char *prop = "" and
2998 ** char *font = "dummy" however this results
2999 ** in a SEG fault, at least on RH7.1
3000 **
3001 ** The current implementation isn't proper
3002 ** either, font is never freed and prop uses
3003 ** a fixed width string
3004 */
3005 char prop[100];
3006 double size = 1;
3007 char *font;
3009 font=malloc(255);
3010 if(sscanf(optarg,
3011 "%10[A-Z]:%lf:%s",
3012 prop,&size,font) == 3){
3013 int sindex;
3014 if((sindex=text_prop_conv(prop)) != -1){
3015 im->text_prop[sindex].size=size;
3016 im->text_prop[sindex].font=font;
3017 if (sindex==0) { /* the default */
3018 im->text_prop[TEXT_PROP_TITLE].size=size;
3019 im->text_prop[TEXT_PROP_TITLE].font=font;
3020 im->text_prop[TEXT_PROP_AXIS].size=size;
3021 im->text_prop[TEXT_PROP_AXIS].font=font;
3022 im->text_prop[TEXT_PROP_UNIT].size=size;
3023 im->text_prop[TEXT_PROP_UNIT].font=font;
3024 im->text_prop[TEXT_PROP_LEGEND].size=size;
3025 im->text_prop[TEXT_PROP_LEGEND].font=font;
3026 }
3027 } else {
3028 rrd_set_error("invalid fonttag '%s'",prop);
3029 return;
3030 }
3031 } else {
3032 rrd_set_error("invalid text property format");
3033 return;
3034 }
3035 break;
3036 }
3037 case 'm':
3038 im->canvas->zoom = atof(optarg);
3039 if (im->canvas->zoom <= 0.0) {
3040 rrd_set_error("zoom factor must be > 0");
3041 return;
3042 }
3043 break;
3044 case 't':
3045 strncpy(im->title,optarg,150);
3046 im->title[150]='\0';
3047 break;
3049 case '?':
3050 if (optopt != 0)
3051 rrd_set_error("unknown option '%c'", optopt);
3052 else
3053 rrd_set_error("unknown option '%s'",argv[optind-1]);
3054 return;
3055 }
3056 }
3058 if (optind >= argc) {
3059 rrd_set_error("missing filename");
3060 return;
3061 }
3063 if (im->logarithmic == 1 && (im->minval <= 0 || isnan(im->minval))){
3064 rrd_set_error("for a logarithmic yaxis you must specify a lower-limit > 0");
3065 return;
3066 }
3068 if (proc_start_end(&start_tv,&end_tv,&start_tmp,&end_tmp) == -1){
3069 /* error string is set in parsetime.c */
3070 return;
3071 }
3073 if (start_tmp < 3600*24*365*10){
3074 rrd_set_error("the first entry to fetch should be after 1980 (%ld)",start_tmp);
3075 return;
3076 }
3078 if (end_tmp < start_tmp) {
3079 rrd_set_error("start (%ld) should be less than end (%ld)",
3080 start_tmp, end_tmp);
3081 return;
3082 }
3084 im->start = start_tmp;
3085 im->end = end_tmp;
3086 im->step = max((long)im->step, (im->end-im->start)/im->xsize);
3087 }
3089 int
3090 rrd_graph_check_vname(image_desc_t *im, char *varname, char *err)
3091 {
3092 if ((im->gdes[im->gdes_c-1].vidx=find_var(im,varname))==-1) {
3093 rrd_set_error("Unknown variable '%s' in %s",varname,err);
3094 return -1;
3095 }
3096 return 0;
3097 }
3098 int
3099 rrd_graph_color(image_desc_t *im, char *var, char *err, int optional)
3100 {
3101 char *color;
3102 graph_desc_t *gdp=&im->gdes[im->gdes_c-1];
3104 color=strstr(var,"#");
3105 if (color==NULL) {
3106 if (optional==0) {
3107 rrd_set_error("Found no color in %s",err);
3108 return 0;
3109 }
3110 return 0;
3111 } else {
3112 int n=0;
3113 char *rest;
3114 gfx_color_t col;
3116 rest=strstr(color,":");
3117 if (rest!=NULL)
3118 n=rest-color;
3119 else
3120 n=strlen(color);
3122 switch (n) {
3123 case 7:
3124 sscanf(color,"#%6lx%n",&col,&n);
3125 col = (col << 8) + 0xff /* shift left by 8 */;
3126 if (n!=7) rrd_set_error("Color problem in %s",err);
3127 break;
3128 case 9:
3129 sscanf(color,"#%8lx%n",&col,&n);
3130 if (n==9) break;
3131 default:
3132 rrd_set_error("Color problem in %s",err);
3133 }
3134 if (rrd_test_error()) return 0;
3135 gdp->col = col;
3136 return n;
3137 }
3138 }
3139 int
3140 rrd_graph_legend(graph_desc_t *gdp, char *line)
3141 {
3142 int i;
3144 i=scan_for_col(line,FMT_LEG_LEN,gdp->legend);
3146 return (strlen(&line[i])==0);
3147 }
3150 int bad_format(char *fmt) {
3151 char *ptr;
3152 int n=0;
3153 ptr = fmt;
3154 while (*ptr != '\0')
3155 if (*ptr++ == '%') {
3157 /* line cannot end with percent char */
3158 if (*ptr == '\0') return 1;
3160 /* '%s', '%S' and '%%' are allowed */
3161 if (*ptr == 's' || *ptr == 'S' || *ptr == '%') ptr++;
3163 /* or else '% 6.2lf' and such are allowed */
3164 else {
3166 /* optional padding character */
3167 if (*ptr == ' ' || *ptr == '+' || *ptr == '-') ptr++;
3169 /* This should take care of 'm.n' with all three optional */
3170 while (*ptr >= '0' && *ptr <= '9') ptr++;
3171 if (*ptr == '.') ptr++;
3172 while (*ptr >= '0' && *ptr <= '9') ptr++;
3174 /* Either 'le', 'lf' or 'lg' must follow here */
3175 if (*ptr++ != 'l') return 1;
3176 if (*ptr == 'e' || *ptr == 'f' || *ptr == 'g') ptr++;
3177 else return 1;
3178 n++;
3179 }
3180 }
3182 return (n!=1);
3183 }
3186 int
3187 vdef_parse(gdes,str)
3188 struct graph_desc_t *gdes;
3189 char *str;
3190 {
3191 /* A VDEF currently is either "func" or "param,func"
3192 * so the parsing is rather simple. Change if needed.
3193 */
3194 double param;
3195 char func[30];
3196 int n;
3198 n=0;
3199 sscanf(str,"%le,%29[A-Z]%n",¶m,func,&n);
3200 if (n== (int)strlen(str)) { /* matched */
3201 ;
3202 } else {
3203 n=0;
3204 sscanf(str,"%29[A-Z]%n",func,&n);
3205 if (n== (int)strlen(str)) { /* matched */
3206 param=DNAN;
3207 } else {
3208 rrd_set_error("Unknown function string '%s' in VDEF '%s'"
3209 ,str
3210 ,gdes->vname
3211 );
3212 return -1;
3213 }
3214 }
3215 if (!strcmp("PERCENT",func)) gdes->vf.op = VDEF_PERCENT;
3216 else if (!strcmp("MAXIMUM",func)) gdes->vf.op = VDEF_MAXIMUM;
3217 else if (!strcmp("AVERAGE",func)) gdes->vf.op = VDEF_AVERAGE;
3218 else if (!strcmp("MINIMUM",func)) gdes->vf.op = VDEF_MINIMUM;
3219 else if (!strcmp("TOTAL", func)) gdes->vf.op = VDEF_TOTAL;
3220 else if (!strcmp("FIRST", func)) gdes->vf.op = VDEF_FIRST;
3221 else if (!strcmp("LAST", func)) gdes->vf.op = VDEF_LAST;
3222 else {
3223 rrd_set_error("Unknown function '%s' in VDEF '%s'\n"
3224 ,func
3225 ,gdes->vname
3226 );
3227 return -1;
3228 };
3230 switch (gdes->vf.op) {
3231 case VDEF_PERCENT:
3232 if (isnan(param)) { /* no parameter given */
3233 rrd_set_error("Function '%s' needs parameter in VDEF '%s'\n"
3234 ,func
3235 ,gdes->vname
3236 );
3237 return -1;
3238 };
3239 if (param>=0.0 && param<=100.0) {
3240 gdes->vf.param = param;
3241 gdes->vf.val = DNAN; /* undefined */
3242 gdes->vf.when = 0; /* undefined */
3243 } else {
3244 rrd_set_error("Parameter '%f' out of range in VDEF '%s'\n"
3245 ,param
3246 ,gdes->vname
3247 );
3248 return -1;
3249 };
3250 break;
3251 case VDEF_MAXIMUM:
3252 case VDEF_AVERAGE:
3253 case VDEF_MINIMUM:
3254 case VDEF_TOTAL:
3255 case VDEF_FIRST:
3256 case VDEF_LAST:
3257 if (isnan(param)) {
3258 gdes->vf.param = DNAN;
3259 gdes->vf.val = DNAN;
3260 gdes->vf.when = 0;
3261 } else {
3262 rrd_set_error("Function '%s' needs no parameter in VDEF '%s'\n"
3263 ,func
3264 ,gdes->vname
3265 );
3266 return -1;
3267 };
3268 break;
3269 };
3270 return 0;
3271 }
3274 int
3275 vdef_calc(im,gdi)
3276 image_desc_t *im;
3277 int gdi;
3278 {
3279 graph_desc_t *src,*dst;
3280 rrd_value_t *data;
3281 long step,steps;
3283 dst = &im->gdes[gdi];
3284 src = &im->gdes[dst->vidx];
3285 data = src->data + src->ds;
3286 steps = (src->end - src->start) / src->step;
3288 #if 0
3289 printf("DEBUG: start == %lu, end == %lu, %lu steps\n"
3290 ,src->start
3291 ,src->end
3292 ,steps
3293 );
3294 #endif
3296 switch (dst->vf.op) {
3297 case VDEF_PERCENT: {
3298 rrd_value_t * array;
3299 int field;
3302 if ((array = malloc(steps*sizeof(double)))==NULL) {
3303 rrd_set_error("malloc VDEV_PERCENT");
3304 return -1;
3305 }
3306 for (step=0;step < steps; step++) {
3307 array[step]=data[step*src->ds_cnt];
3308 }
3309 qsort(array,step,sizeof(double),vdef_percent_compar);
3311 field = (steps-1)*dst->vf.param/100;
3312 dst->vf.val = array[field];
3313 dst->vf.when = 0; /* no time component */
3314 free(array);
3315 #if 0
3316 for(step=0;step<steps;step++)
3317 printf("DEBUG: %3li:%10.2f %c\n",step,array[step],step==field?'*':' ');
3318 #endif
3319 }
3320 break;
3321 case VDEF_MAXIMUM:
3322 step=0;
3323 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3324 if (step == steps) {
3325 dst->vf.val = DNAN;
3326 dst->vf.when = 0;
3327 } else {
3328 dst->vf.val = data[step*src->ds_cnt];
3329 dst->vf.when = src->start + (step+1)*src->step;
3330 }
3331 while (step != steps) {
3332 if (finite(data[step*src->ds_cnt])) {
3333 if (data[step*src->ds_cnt] > dst->vf.val) {
3334 dst->vf.val = data[step*src->ds_cnt];
3335 dst->vf.when = src->start + (step+1)*src->step;
3336 }
3337 }
3338 step++;
3339 }
3340 break;
3341 case VDEF_TOTAL:
3342 case VDEF_AVERAGE: {
3343 int cnt=0;
3344 double sum=0.0;
3345 for (step=0;step<steps;step++) {
3346 if (finite(data[step*src->ds_cnt])) {
3347 sum += data[step*src->ds_cnt];
3348 cnt ++;
3349 };
3350 }
3351 if (cnt) {
3352 if (dst->vf.op == VDEF_TOTAL) {
3353 dst->vf.val = sum*src->step;
3354 dst->vf.when = cnt*src->step; /* not really "when" */
3355 } else {
3356 dst->vf.val = sum/cnt;
3357 dst->vf.when = 0; /* no time component */
3358 };
3359 } else {
3360 dst->vf.val = DNAN;
3361 dst->vf.when = 0;
3362 }
3363 }
3364 break;
3365 case VDEF_MINIMUM:
3366 step=0;
3367 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3368 if (step == steps) {
3369 dst->vf.val = DNAN;
3370 dst->vf.when = 0;
3371 } else {
3372 dst->vf.val = data[step*src->ds_cnt];
3373 dst->vf.when = src->start + (step+1)*src->step;
3374 }
3375 while (step != steps) {
3376 if (finite(data[step*src->ds_cnt])) {
3377 if (data[step*src->ds_cnt] < dst->vf.val) {
3378 dst->vf.val = data[step*src->ds_cnt];
3379 dst->vf.when = src->start + (step+1)*src->step;
3380 }
3381 }
3382 step++;
3383 }
3384 break;
3385 case VDEF_FIRST:
3386 /* The time value returned here is one step before the
3387 * actual time value. This is the start of the first
3388 * non-NaN interval.
3389 */
3390 step=0;
3391 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3392 if (step == steps) { /* all entries were NaN */
3393 dst->vf.val = DNAN;
3394 dst->vf.when = 0;
3395 } else {
3396 dst->vf.val = data[step*src->ds_cnt];
3397 dst->vf.when = src->start + step*src->step;
3398 }
3399 break;
3400 case VDEF_LAST:
3401 /* The time value returned here is the
3402 * actual time value. This is the end of the last
3403 * non-NaN interval.
3404 */
3405 step=steps-1;
3406 while (step >= 0 && isnan(data[step*src->ds_cnt])) step--;
3407 if (step < 0) { /* all entries were NaN */
3408 dst->vf.val = DNAN;
3409 dst->vf.when = 0;
3410 } else {
3411 dst->vf.val = data[step*src->ds_cnt];
3412 dst->vf.when = src->start + (step+1)*src->step;
3413 }
3414 break;
3415 }
3416 return 0;
3417 }
3419 /* NaN < -INF < finite_values < INF */
3420 int
3421 vdef_percent_compar(a,b)
3422 const void *a,*b;
3423 {
3424 /* Equality is not returned; this doesn't hurt except
3425 * (maybe) for a little performance.
3426 */
3428 /* First catch NaN values. They are smallest */
3429 if (isnan( *(double *)a )) return -1;
3430 if (isnan( *(double *)b )) return 1;
3432 /* NaN doesn't reach this part so INF and -INF are extremes.
3433 * The sign from isinf() is compatible with the sign we return
3434 */
3435 if (isinf( *(double *)a )) return isinf( *(double *)a );
3436 if (isinf( *(double *)b )) return isinf( *(double *)b );
3438 /* If we reach this, both values must be finite */
3439 if ( *(double *)a < *(double *)b ) return -1; else return 1;
3440 }