d22c85350a2750d36455411afa08b74308975f6c
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->gdes[i].gf == GF_HRULE &&
1400 (im->gdes[i].yrule < im->minval || im->gdes[i].yrule > im->maxval))
1401 im->gdes[i].legend[0] = '\0';
1403 if (im->gdes[i].gf == GF_VRULE &&
1404 (im->gdes[i].xrule < im->start || im->gdes[i].xrule > im->end))
1405 im->gdes[i].legend[0] = '\0';
1407 leg_cc = strlen(im->gdes[i].legend);
1409 /* is there a controle code ant the end of the legend string ? */
1410 if (leg_cc >= 2 && im->gdes[i].legend[leg_cc-2] == '\\') {
1411 prt_fctn = im->gdes[i].legend[leg_cc-1];
1412 leg_cc -= 2;
1413 im->gdes[i].legend[leg_cc] = '\0';
1414 } else {
1415 prt_fctn = '\0';
1416 }
1417 /* remove exess space */
1418 while (prt_fctn=='g' &&
1419 leg_cc > 0 &&
1420 im->gdes[i].legend[leg_cc-1]==' '){
1421 leg_cc--;
1422 im->gdes[i].legend[leg_cc]='\0';
1423 }
1424 if (leg_cc != 0 ){
1425 legspace[i]=(prt_fctn=='g' ? 0 : interleg);
1427 if (fill > 0){
1428 /* no interleg space if string ends in \g */
1429 fill += legspace[i];
1430 }
1431 if (im->gdes[i].gf != GF_GPRINT &&
1432 im->gdes[i].gf != GF_COMMENT) {
1433 fill += box;
1434 }
1435 fill += gfx_get_text_width(im->canvas, fill+border,
1436 im->text_prop[TEXT_PROP_LEGEND].font,
1437 im->text_prop[TEXT_PROP_LEGEND].size,
1438 im->tabwidth,
1439 im->gdes[i].legend, 0);
1440 leg_c++;
1441 } else {
1442 legspace[i]=0;
1443 }
1444 /* who said there was a special tag ... ?*/
1445 if (prt_fctn=='g') {
1446 prt_fctn = '\0';
1447 }
1448 if (prt_fctn == '\0') {
1449 if (i == im->gdes_c -1 ) prt_fctn ='l';
1451 /* is it time to place the legends ? */
1452 if (fill > im->ximg - 2*border){
1453 if (leg_c > 1) {
1454 /* go back one */
1455 i--;
1456 fill = fill_last;
1457 leg_c--;
1458 prt_fctn = 'j';
1459 } else {
1460 prt_fctn = 'l';
1461 }
1463 }
1464 }
1467 if (prt_fctn != '\0'){
1468 leg_x = border;
1469 if (leg_c >= 2 && prt_fctn == 'j') {
1470 glue = (im->ximg - fill - 2* border) / (leg_c-1);
1471 } else {
1472 glue = 0;
1473 }
1474 if (prt_fctn =='c') leg_x = (im->ximg - fill) / 2.0;
1475 if (prt_fctn =='r') leg_x = im->ximg - fill - border;
1477 for(ii=mark;ii<=i;ii++){
1478 if(im->gdes[ii].legend[0]=='\0')
1479 continue;
1480 im->gdes[ii].leg_x = leg_x;
1481 im->gdes[ii].leg_y = leg_y;
1482 leg_x +=
1483 gfx_get_text_width(im->canvas, leg_x,
1484 im->text_prop[TEXT_PROP_LEGEND].font,
1485 im->text_prop[TEXT_PROP_LEGEND].size,
1486 im->tabwidth,
1487 im->gdes[ii].legend, 0)
1488 + legspace[ii]
1489 + glue;
1490 if (im->gdes[ii].gf != GF_GPRINT &&
1491 im->gdes[ii].gf != GF_COMMENT)
1492 leg_x += box;
1493 }
1494 leg_y = leg_y + im->text_prop[TEXT_PROP_LEGEND].size*1.2;
1495 if (prt_fctn == 's') leg_y -= im->text_prop[TEXT_PROP_LEGEND].size*1.2;
1496 fill = 0;
1497 leg_c = 0;
1498 mark = ii;
1499 }
1500 }
1501 im->yimg = leg_y;
1502 free(legspace);
1503 }
1504 return 0;
1505 }
1507 /* create a grid on the graph. it determines what to do
1508 from the values of xsize, start and end */
1510 /* the xaxis labels are determined from the number of seconds per pixel
1511 in the requested graph */
1515 int
1516 calc_horizontal_grid(image_desc_t *im)
1517 {
1518 double range;
1519 double scaledrange;
1520 int pixel,i;
1521 int gridind;
1522 int decimals, fractionals;
1524 im->ygrid_scale.labfact=2;
1525 gridind=-1;
1526 range = im->maxval - im->minval;
1527 scaledrange = range / im->magfact;
1529 /* does the scale of this graph make it impossible to put lines
1530 on it? If so, give up. */
1531 if (isnan(scaledrange)) {
1532 return 0;
1533 }
1535 /* find grid spaceing */
1536 pixel=1;
1537 if(isnan(im->ygridstep)){
1538 if(im->extra_flags & ALTYGRID) {
1539 /* find the value with max number of digits. Get number of digits */
1540 decimals = ceil(log10(max(fabs(im->maxval), fabs(im->minval))));
1541 if(decimals <= 0) /* everything is small. make place for zero */
1542 decimals = 1;
1544 fractionals = floor(log10(range));
1545 if(fractionals < 0) /* small amplitude. */
1546 sprintf(im->ygrid_scale.labfmt, "%%%d.%df", decimals - fractionals + 1, -fractionals + 1);
1547 else
1548 sprintf(im->ygrid_scale.labfmt, "%%%d.1f", decimals + 1);
1549 im->ygrid_scale.gridstep = pow((double)10, (double)fractionals);
1550 if(im->ygrid_scale.gridstep == 0) /* range is one -> 0.1 is reasonable scale */
1551 im->ygrid_scale.gridstep = 0.1;
1552 /* should have at least 5 lines but no more then 15 */
1553 if(range/im->ygrid_scale.gridstep < 5)
1554 im->ygrid_scale.gridstep /= 10;
1555 if(range/im->ygrid_scale.gridstep > 15)
1556 im->ygrid_scale.gridstep *= 10;
1557 if(range/im->ygrid_scale.gridstep > 5) {
1558 im->ygrid_scale.labfact = 1;
1559 if(range/im->ygrid_scale.gridstep > 8)
1560 im->ygrid_scale.labfact = 2;
1561 }
1562 else {
1563 im->ygrid_scale.gridstep /= 5;
1564 im->ygrid_scale.labfact = 5;
1565 }
1566 }
1567 else {
1568 for(i=0;ylab[i].grid > 0;i++){
1569 pixel = im->ysize / (scaledrange / ylab[i].grid);
1570 if (gridind == -1 && pixel > 5) {
1571 gridind = i;
1572 break;
1573 }
1574 }
1576 for(i=0; i<4;i++) {
1577 if (pixel * ylab[gridind].lfac[i] >= 2 * im->text_prop[TEXT_PROP_AXIS].size) {
1578 im->ygrid_scale.labfact = ylab[gridind].lfac[i];
1579 break;
1580 }
1581 }
1583 im->ygrid_scale.gridstep = ylab[gridind].grid * im->magfact;
1584 }
1585 } else {
1586 im->ygrid_scale.gridstep = im->ygridstep;
1587 im->ygrid_scale.labfact = im->ylabfact;
1588 }
1589 return 1;
1590 }
1592 int draw_horizontal_grid(image_desc_t *im)
1593 {
1594 int i;
1595 double scaledstep;
1596 char graph_label[100];
1597 double X0=im->xorigin;
1598 double X1=im->xorigin+im->xsize;
1600 int sgrid = (int)( im->minval / im->ygrid_scale.gridstep - 1);
1601 int egrid = (int)( im->maxval / im->ygrid_scale.gridstep + 1);
1602 scaledstep = im->ygrid_scale.gridstep/im->magfact;
1603 for (i = sgrid; i <= egrid; i++){
1604 double Y0=ytr(im,im->ygrid_scale.gridstep*i);
1605 if ( Y0 >= im->yorigin-im->ysize
1606 && Y0 <= im->yorigin){
1607 if(i % im->ygrid_scale.labfact == 0){
1608 if (i==0 || im->symbol == ' ') {
1609 if(scaledstep < 1){
1610 if(im->extra_flags & ALTYGRID) {
1611 sprintf(graph_label,im->ygrid_scale.labfmt,scaledstep*i);
1612 }
1613 else {
1614 sprintf(graph_label,"%4.1f",scaledstep*i);
1615 }
1616 } else {
1617 sprintf(graph_label,"%4.0f",scaledstep*i);
1618 }
1619 }else {
1620 if(scaledstep < 1){
1621 sprintf(graph_label,"%4.1f %c",scaledstep*i, im->symbol);
1622 } else {
1623 sprintf(graph_label,"%4.0f %c",scaledstep*i, im->symbol);
1624 }
1625 }
1627 gfx_new_text ( im->canvas,
1628 X0-im->text_prop[TEXT_PROP_AXIS].size/1.5, Y0,
1629 im->graph_col[GRC_FONT],
1630 im->text_prop[TEXT_PROP_AXIS].font,
1631 im->text_prop[TEXT_PROP_AXIS].size,
1632 im->tabwidth, 0.0, GFX_H_RIGHT, GFX_V_CENTER,
1633 graph_label );
1634 gfx_new_dashed_line ( im->canvas,
1635 X0-2,Y0,
1636 X1+2,Y0,
1637 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1638 im->grid_dash_on, im->grid_dash_off);
1640 } else if (!(im->extra_flags & NOMINOR)) {
1641 gfx_new_dashed_line ( im->canvas,
1642 X0-1,Y0,
1643 X1+1,Y0,
1644 GRIDWIDTH, im->graph_col[GRC_GRID],
1645 im->grid_dash_on, im->grid_dash_off);
1647 }
1648 }
1649 }
1650 return 1;
1651 }
1653 /* logaritmic horizontal grid */
1654 int
1655 horizontal_log_grid(image_desc_t *im)
1656 {
1657 double pixpex;
1658 int ii,i;
1659 int minoridx=0, majoridx=0;
1660 char graph_label[100];
1661 double X0,X1,Y0;
1662 double value, pixperstep, minstep;
1664 /* find grid spaceing */
1665 pixpex= (double)im->ysize / (log10(im->maxval) - log10(im->minval));
1667 if (isnan(pixpex)) {
1668 return 0;
1669 }
1671 for(i=0;yloglab[i][0] > 0;i++){
1672 minstep = log10(yloglab[i][0]);
1673 for(ii=1;yloglab[i][ii+1] > 0;ii++){
1674 if(yloglab[i][ii+2]==0){
1675 minstep = log10(yloglab[i][ii+1])-log10(yloglab[i][ii]);
1676 break;
1677 }
1678 }
1679 pixperstep = pixpex * minstep;
1680 if(pixperstep > 5){minoridx = i;}
1681 if(pixperstep > 2 * im->text_prop[TEXT_PROP_LEGEND].size){majoridx = i;}
1682 }
1684 X0=im->xorigin;
1685 X1=im->xorigin+im->xsize;
1686 /* paint minor grid */
1687 for (value = pow((double)10, log10(im->minval)
1688 - fmod(log10(im->minval),log10(yloglab[minoridx][0])));
1689 value <= im->maxval;
1690 value *= yloglab[minoridx][0]){
1691 if (value < im->minval) continue;
1692 i=0;
1693 while(yloglab[minoridx][++i] > 0){
1694 Y0 = ytr(im,value * yloglab[minoridx][i]);
1695 if (Y0 <= im->yorigin - im->ysize) break;
1696 gfx_new_dashed_line ( im->canvas,
1697 X0-1,Y0,
1698 X1+1,Y0,
1699 GRIDWIDTH, im->graph_col[GRC_GRID],
1700 im->grid_dash_on, im->grid_dash_off);
1701 }
1702 }
1704 /* paint major grid and labels*/
1705 for (value = pow((double)10, log10(im->minval)
1706 - fmod(log10(im->minval),log10(yloglab[majoridx][0])));
1707 value <= im->maxval;
1708 value *= yloglab[majoridx][0]){
1709 if (value < im->minval) continue;
1710 i=0;
1711 while(yloglab[majoridx][++i] > 0){
1712 Y0 = ytr(im,value * yloglab[majoridx][i]);
1713 if (Y0 <= im->yorigin - im->ysize) break;
1714 gfx_new_dashed_line ( im->canvas,
1715 X0-2,Y0,
1716 X1+2,Y0,
1717 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1718 im->grid_dash_on, im->grid_dash_off);
1720 sprintf(graph_label,"%3.0e",value * yloglab[majoridx][i]);
1721 gfx_new_text ( im->canvas,
1722 X0-im->text_prop[TEXT_PROP_AXIS].size/1.5, Y0,
1723 im->graph_col[GRC_FONT],
1724 im->text_prop[TEXT_PROP_AXIS].font,
1725 im->text_prop[TEXT_PROP_AXIS].size,
1726 im->tabwidth,0.0, GFX_H_RIGHT, GFX_V_CENTER,
1727 graph_label );
1728 }
1729 }
1730 return 1;
1731 }
1734 void
1735 vertical_grid(
1736 image_desc_t *im )
1737 {
1738 int xlab_sel; /* which sort of label and grid ? */
1739 time_t ti, tilab, timajor;
1740 long factor;
1741 char graph_label[100];
1742 double X0,Y0,Y1; /* points for filled graph and more*/
1743 struct tm tm;
1745 /* the type of time grid is determined by finding
1746 the number of seconds per pixel in the graph */
1749 if(im->xlab_user.minsec == -1){
1750 factor=(im->end - im->start)/im->xsize;
1751 xlab_sel=0;
1752 while ( xlab[xlab_sel+1].minsec != -1
1753 && xlab[xlab_sel+1].minsec <= factor){ xlab_sel++; }
1754 im->xlab_user.gridtm = xlab[xlab_sel].gridtm;
1755 im->xlab_user.gridst = xlab[xlab_sel].gridst;
1756 im->xlab_user.mgridtm = xlab[xlab_sel].mgridtm;
1757 im->xlab_user.mgridst = xlab[xlab_sel].mgridst;
1758 im->xlab_user.labtm = xlab[xlab_sel].labtm;
1759 im->xlab_user.labst = xlab[xlab_sel].labst;
1760 im->xlab_user.precis = xlab[xlab_sel].precis;
1761 im->xlab_user.stst = xlab[xlab_sel].stst;
1762 }
1764 /* y coords are the same for every line ... */
1765 Y0 = im->yorigin;
1766 Y1 = im->yorigin-im->ysize;
1769 /* paint the minor grid */
1770 if (!(im->extra_flags & NOMINOR))
1771 {
1772 for(ti = find_first_time(im->start,
1773 im->xlab_user.gridtm,
1774 im->xlab_user.gridst),
1775 timajor = find_first_time(im->start,
1776 im->xlab_user.mgridtm,
1777 im->xlab_user.mgridst);
1778 ti < im->end;
1779 ti = find_next_time(ti,im->xlab_user.gridtm,im->xlab_user.gridst)
1780 ){
1781 /* are we inside the graph ? */
1782 if (ti < im->start || ti > im->end) continue;
1783 while (timajor < ti) {
1784 timajor = find_next_time(timajor,
1785 im->xlab_user.mgridtm, im->xlab_user.mgridst);
1786 }
1787 if (ti == timajor) continue; /* skip as falls on major grid line */
1788 X0 = xtr(im,ti);
1789 gfx_new_dashed_line(im->canvas,X0,Y0+1, X0,Y1-1,GRIDWIDTH,
1790 im->graph_col[GRC_GRID],
1791 im->grid_dash_on, im->grid_dash_off);
1793 }
1794 }
1796 /* paint the major grid */
1797 for(ti = find_first_time(im->start,
1798 im->xlab_user.mgridtm,
1799 im->xlab_user.mgridst);
1800 ti < im->end;
1801 ti = find_next_time(ti,im->xlab_user.mgridtm,im->xlab_user.mgridst)
1802 ){
1803 /* are we inside the graph ? */
1804 if (ti < im->start || ti > im->end) continue;
1805 X0 = xtr(im,ti);
1806 gfx_new_dashed_line(im->canvas,X0,Y0+3, X0,Y1-2,MGRIDWIDTH,
1807 im->graph_col[GRC_MGRID],
1808 im->grid_dash_on, im->grid_dash_off);
1810 }
1811 /* paint the labels below the graph */
1812 for(ti = find_first_time(im->start,
1813 im->xlab_user.labtm,
1814 im->xlab_user.labst);
1815 ti <= im->end;
1816 ti = find_next_time(ti,im->xlab_user.labtm,im->xlab_user.labst)
1817 ){
1818 tilab= ti + im->xlab_user.precis/2; /* correct time for the label */
1819 /* are we inside the graph ? */
1820 if (ti < im->start || ti > im->end) continue;
1822 #if HAVE_STRFTIME
1823 localtime_r(&tilab, &tm);
1824 strftime(graph_label,99,im->xlab_user.stst, &tm);
1825 #else
1826 # error "your libc has no strftime I guess we'll abort the exercise here."
1827 #endif
1828 gfx_new_text ( im->canvas,
1829 xtr(im,tilab), Y0+im->text_prop[TEXT_PROP_AXIS].size/1.5,
1830 im->graph_col[GRC_FONT],
1831 im->text_prop[TEXT_PROP_AXIS].font,
1832 im->text_prop[TEXT_PROP_AXIS].size,
1833 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_TOP,
1834 graph_label );
1836 }
1838 }
1841 void
1842 axis_paint(
1843 image_desc_t *im
1844 )
1845 {
1846 /* draw x and y axis */
1847 gfx_new_line ( im->canvas, im->xorigin+im->xsize,im->yorigin,
1848 im->xorigin+im->xsize,im->yorigin-im->ysize,
1849 GRIDWIDTH, im->graph_col[GRC_GRID]);
1851 gfx_new_line ( im->canvas, im->xorigin,im->yorigin-im->ysize,
1852 im->xorigin+im->xsize,im->yorigin-im->ysize,
1853 GRIDWIDTH, im->graph_col[GRC_GRID]);
1855 gfx_new_line ( im->canvas, im->xorigin-4,im->yorigin,
1856 im->xorigin+im->xsize+4,im->yorigin,
1857 MGRIDWIDTH, im->graph_col[GRC_GRID]);
1859 gfx_new_line ( im->canvas, im->xorigin,im->yorigin+4,
1860 im->xorigin,im->yorigin-im->ysize-4,
1861 MGRIDWIDTH, im->graph_col[GRC_GRID]);
1864 /* arrow for X axis direction */
1865 gfx_new_area ( im->canvas,
1866 im->xorigin+im->xsize+3, im->yorigin-3,
1867 im->xorigin+im->xsize+3, im->yorigin+4,
1868 im->xorigin+im->xsize+8, im->yorigin+0.5, /* LINEOFFSET */
1869 im->graph_col[GRC_ARROW]);
1873 }
1875 void
1876 grid_paint(image_desc_t *im)
1877 {
1878 long i;
1879 int res=0;
1880 double X0,Y0; /* points for filled graph and more*/
1881 gfx_node_t *node;
1883 /* draw 3d border */
1884 node = gfx_new_area (im->canvas, 0,im->yimg,
1885 2,im->yimg-2,
1886 2,2,im->graph_col[GRC_SHADEA]);
1887 gfx_add_point( node , im->ximg - 2, 2 );
1888 gfx_add_point( node , im->ximg, 0 );
1889 gfx_add_point( node , 0,0 );
1890 /* gfx_add_point( node , 0,im->yimg ); */
1892 node = gfx_new_area (im->canvas, 2,im->yimg-2,
1893 im->ximg-2,im->yimg-2,
1894 im->ximg - 2, 2,
1895 im->graph_col[GRC_SHADEB]);
1896 gfx_add_point( node , im->ximg,0);
1897 gfx_add_point( node , im->ximg,im->yimg);
1898 gfx_add_point( node , 0,im->yimg);
1899 /* gfx_add_point( node , 0,im->yimg ); */
1902 if (im->draw_x_grid == 1 )
1903 vertical_grid(im);
1905 if (im->draw_y_grid == 1){
1906 if(im->logarithmic){
1907 res = horizontal_log_grid(im);
1908 } else {
1909 res = draw_horizontal_grid(im);
1910 }
1912 /* dont draw horizontal grid if there is no min and max val */
1913 if (! res ) {
1914 char *nodata = "No Data found";
1915 gfx_new_text(im->canvas,im->ximg/2, (2*im->yorigin-im->ysize) / 2,
1916 im->graph_col[GRC_FONT],
1917 im->text_prop[TEXT_PROP_AXIS].font,
1918 im->text_prop[TEXT_PROP_AXIS].size,
1919 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_CENTER,
1920 nodata );
1921 }
1922 }
1924 /* yaxis description */
1925 /* if (im->canvas->imgformat != IF_PNG) {*/
1926 if (1) {
1927 gfx_new_text( im->canvas,
1928 7, (im->yorigin - im->ysize/2),
1929 im->graph_col[GRC_FONT],
1930 im->text_prop[TEXT_PROP_AXIS].font,
1931 im->text_prop[TEXT_PROP_AXIS].size, im->tabwidth,
1932 RRDGRAPH_YLEGEND_ANGLE,
1933 GFX_H_LEFT, GFX_V_CENTER,
1934 im->ylegend);
1935 } else {
1936 /* horrible hack until we can actually print vertically */
1937 {
1938 int n;
1939 char s[2];
1940 for (n=0;n< (int)strlen(im->ylegend);n++) {
1941 s[0]=im->ylegend[n];
1942 s[1]='\0';
1943 gfx_new_text(im->canvas,7,im->text_prop[TEXT_PROP_AXIS].size*(n+1),
1944 im->graph_col[GRC_FONT],
1945 im->text_prop[TEXT_PROP_AXIS].font,
1946 im->text_prop[TEXT_PROP_AXIS].size, im->tabwidth, 270.0,
1947 GFX_H_CENTER, GFX_V_CENTER,
1948 s);
1949 }
1950 }
1951 }
1953 /* graph title */
1954 gfx_new_text( im->canvas,
1955 im->ximg/2, im->text_prop[TEXT_PROP_TITLE].size,
1956 im->graph_col[GRC_FONT],
1957 im->text_prop[TEXT_PROP_TITLE].font,
1958 im->text_prop[TEXT_PROP_TITLE].size, im->tabwidth, 0.0,
1959 GFX_H_CENTER, GFX_V_CENTER,
1960 im->title);
1962 /* graph labels */
1963 if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
1964 for(i=0;i<im->gdes_c;i++){
1965 if(im->gdes[i].legend[0] =='\0')
1966 continue;
1968 /* im->gdes[i].leg_y is the bottom of the legend */
1969 X0 = im->gdes[i].leg_x;
1970 Y0 = im->gdes[i].leg_y;
1971 /* Box needed? */
1972 if ( im->gdes[i].gf != GF_GPRINT
1973 && im->gdes[i].gf != GF_COMMENT) {
1974 int boxH, boxV;
1976 boxH = gfx_get_text_width(im->canvas, 0,
1977 im->text_prop[TEXT_PROP_AXIS].font,
1978 im->text_prop[TEXT_PROP_AXIS].size,
1979 im->tabwidth,"M", 0) * 1.25;
1980 boxV = boxH;
1982 node = gfx_new_area(im->canvas,
1983 X0,Y0-boxV,
1984 X0,Y0,
1985 X0+boxH,Y0,
1986 im->gdes[i].col);
1987 gfx_add_point ( node, X0+boxH, Y0-boxV );
1988 node = gfx_new_line(im->canvas,
1989 X0,Y0-boxV, X0,Y0,
1990 1,0x000000FF);
1991 gfx_add_point(node,X0+boxH,Y0);
1992 gfx_add_point(node,X0+boxH,Y0-boxV);
1993 gfx_close_path(node);
1994 X0 += boxH / 1.25 * 2;
1995 }
1996 gfx_new_text ( im->canvas, X0, Y0,
1997 im->graph_col[GRC_FONT],
1998 im->text_prop[TEXT_PROP_AXIS].font,
1999 im->text_prop[TEXT_PROP_AXIS].size,
2000 im->tabwidth,0.0, GFX_H_LEFT, GFX_V_BOTTOM,
2001 im->gdes[i].legend );
2002 }
2003 }
2004 }
2007 /*****************************************************
2008 * lazy check make sure we rely need to create this graph
2009 *****************************************************/
2011 int lazy_check(image_desc_t *im){
2012 FILE *fd = NULL;
2013 int size = 1;
2014 struct stat imgstat;
2016 if (im->lazy == 0) return 0; /* no lazy option */
2017 if (stat(im->graphfile,&imgstat) != 0)
2018 return 0; /* can't stat */
2019 /* one pixel in the existing graph is more then what we would
2020 change here ... */
2021 if (time(NULL) - imgstat.st_mtime >
2022 (im->end - im->start) / im->xsize)
2023 return 0;
2024 if ((fd = fopen(im->graphfile,"rb")) == NULL)
2025 return 0; /* the file does not exist */
2026 switch (im->canvas->imgformat) {
2027 case IF_PNG:
2028 size = PngSize(fd,&(im->ximg),&(im->yimg));
2029 break;
2030 default:
2031 size = 1;
2032 }
2033 fclose(fd);
2034 return size;
2035 }
2037 void
2038 pie_part(image_desc_t *im, gfx_color_t color,
2039 double PieCenterX, double PieCenterY, double Radius,
2040 double startangle, double endangle)
2041 {
2042 gfx_node_t *node;
2043 double angle;
2044 double step=M_PI/50; /* Number of iterations for the circle;
2045 ** 10 is definitely too low, more than
2046 ** 50 seems to be overkill
2047 */
2049 /* Strange but true: we have to work clockwise or else
2050 ** anti aliasing nor transparency don't work.
2051 **
2052 ** This test is here to make sure we do it right, also
2053 ** this makes the for...next loop more easy to implement.
2054 ** The return will occur if the user enters a negative number
2055 ** (which shouldn't be done according to the specs) or if the
2056 ** programmers do something wrong (which, as we all know, never
2057 ** happens anyway :)
2058 */
2059 if (endangle<startangle) return;
2061 /* Hidden feature: Radius decreases each full circle */
2062 angle=startangle;
2063 while (angle>=2*M_PI) {
2064 angle -= 2*M_PI;
2065 Radius *= 0.8;
2066 }
2068 node=gfx_new_area(im->canvas,
2069 PieCenterX+sin(startangle)*Radius,
2070 PieCenterY-cos(startangle)*Radius,
2071 PieCenterX,
2072 PieCenterY,
2073 PieCenterX+sin(endangle)*Radius,
2074 PieCenterY-cos(endangle)*Radius,
2075 color);
2076 for (angle=endangle;angle-startangle>=step;angle-=step) {
2077 gfx_add_point(node,
2078 PieCenterX+sin(angle)*Radius,
2079 PieCenterY-cos(angle)*Radius );
2080 }
2081 }
2083 int
2084 graph_size_location(image_desc_t *im, int elements, int piechart )
2085 {
2086 /* The actual size of the image to draw is determined from
2087 ** several sources. The size given on the command line is
2088 ** the graph area but we need more as we have to draw labels
2089 ** and other things outside the graph area
2090 */
2092 /* +-+-------------------------------------------+
2093 ** |l|.................title.....................|
2094 ** |e+--+-------------------------------+--------+
2095 ** |b| b| | |
2096 ** |a| a| | pie |
2097 ** |l| l| main graph area | chart |
2098 ** |.| .| | area |
2099 ** |t| y| | |
2100 ** |r+--+-------------------------------+--------+
2101 ** |e| | x-axis labels | |
2102 ** |v+--+-------------------------------+--------+
2103 ** | |..............legends......................|
2104 ** +-+-------------------------------------------+
2105 */
2106 int Xvertical=0, Yvertical=0,
2107 Xtitle =0, Ytitle =0,
2108 Xylabel =0, Yylabel =0,
2109 Xmain =0, Ymain =0,
2110 Xpie =0, Ypie =0,
2111 Xxlabel =0, Yxlabel =0,
2112 #if 0
2113 Xlegend =0, Ylegend =0,
2114 #endif
2115 Xspacing =10, Yspacing =10;
2117 if (im->extra_flags & ONLY_GRAPH) {
2118 if ( im->ysize > 32 ) {
2119 rrd_set_error("height > 32 is not possible with --only-graph option");
2120 return -1;
2121 }
2122 Xspacing =0;
2123 Yspacing =0;
2124 } else {
2125 if (im->ylegend[0] != '\0') {
2126 Xvertical = im->text_prop[TEXT_PROP_LEGEND].size *2;
2127 Yvertical = im->text_prop[TEXT_PROP_LEGEND].size * (strlen(im->ylegend)+1);
2128 }
2129 }
2131 if (im->title[0] != '\0') {
2132 /* The title is placed "inbetween" two text lines so it
2133 ** automatically has some vertical spacing. The horizontal
2134 ** spacing is added here, on each side.
2135 */
2136 Xtitle = gfx_get_text_width(im->canvas, 0,
2137 im->text_prop[TEXT_PROP_TITLE].font,
2138 im->text_prop[TEXT_PROP_TITLE].size,
2139 im->tabwidth,
2140 im->title, 0) + 2*Xspacing;
2141 Ytitle = im->text_prop[TEXT_PROP_TITLE].size*2;
2142 }
2144 if (elements) {
2145 Xmain=im->xsize;
2146 Ymain=im->ysize;
2147 if (im->draw_x_grid) {
2148 Xxlabel=Xmain;
2149 Yxlabel=im->text_prop[TEXT_PROP_LEGEND].size *2;
2150 }
2151 if (im->draw_y_grid) {
2152 Xylabel=im->text_prop[TEXT_PROP_LEGEND].size *6;
2153 Yylabel=Ymain;
2154 }
2155 }
2157 if (piechart) {
2158 im->piesize=im->xsize<im->ysize?im->xsize:im->ysize;
2159 Xpie=im->piesize;
2160 Ypie=im->piesize;
2161 }
2163 /* Now calculate the total size. Insert some spacing where
2164 desired. im->xorigin and im->yorigin need to correspond
2165 with the lower left corner of the main graph area or, if
2166 this one is not set, the imaginary box surrounding the
2167 pie chart area. */
2169 /* The legend width cannot yet be determined, as a result we
2170 ** have problems adjusting the image to it. For now, we just
2171 ** forget about it at all; the legend will have to fit in the
2172 ** size already allocated.
2173 */
2174 im->ximg = Xmain;
2176 if ( !(im->extra_flags & ONLY_GRAPH) ) {
2177 im->ximg = Xylabel + Xmain + Xpie + Xspacing;
2178 }
2180 if (Xmain) im->ximg += Xspacing;
2181 if (Xpie) im->ximg += Xspacing;
2183 if (im->extra_flags & ONLY_GRAPH) {
2184 im->xorigin = 0;
2185 } else {
2186 im->xorigin = Xspacing + Xylabel;
2187 }
2189 if (Xtitle > im->ximg) im->ximg = Xtitle;
2190 if (Xvertical) {
2191 im->ximg += Xvertical;
2192 im->xorigin += Xvertical;
2193 }
2194 xtr(im,0);
2196 /* The vertical size is interesting... we need to compare
2197 ** the sum of {Ytitle, Ymain, Yxlabel, Ylegend} with Yvertical
2198 ** however we need to know {Ytitle+Ymain+Yxlabel} in order to
2199 ** start even thinking about Ylegend.
2200 **
2201 ** Do it in three portions: First calculate the inner part,
2202 ** then do the legend, then adjust the total height of the img.
2203 */
2205 /* reserve space for main and/or pie */
2207 if (im->extra_flags & ONLY_GRAPH) {
2208 im->yimg = Ymain;
2209 } else {
2210 im->yimg = Ymain + Yxlabel;
2211 }
2213 if (im->yimg < Ypie) im->yimg = Ypie;
2215 if (im->extra_flags & ONLY_GRAPH) {
2216 im->yorigin = im->yimg;
2217 } else {
2218 im->yorigin = im->yimg - Yxlabel;
2219 }
2221 /* reserve space for the title *or* some padding above the graph */
2222 if (Ytitle) {
2223 im->yimg += Ytitle;
2224 im->yorigin += Ytitle;
2225 } else {
2226 im->yimg += Yspacing;
2227 im->yorigin += Yspacing;
2228 }
2229 /* reserve space for padding below the graph */
2230 im->yimg += Yspacing;
2231 ytr(im,DNAN);
2233 /* Determine where to place the legends onto the image.
2234 ** Adjust im->yimg to match the space requirements.
2235 */
2236 if(leg_place(im)==-1)
2237 return -1;
2239 /* last of three steps: check total height of image */
2240 if (im->yimg < Yvertical) im->yimg = Yvertical;
2242 #if 0
2243 if (Xlegend > im->ximg) {
2244 im->ximg = Xlegend;
2245 /* reposition Pie */
2246 }
2247 #endif
2249 /* The pie is placed in the upper right hand corner,
2250 ** just below the title (if any) and with sufficient
2251 ** padding.
2252 */
2253 if (elements) {
2254 im->pie_x = im->ximg - Xspacing - Xpie/2;
2255 im->pie_y = im->yorigin-Ymain+Ypie/2;
2256 } else {
2257 im->pie_x = im->ximg/2;
2258 im->pie_y = im->yorigin-Ypie/2;
2259 }
2261 return 0;
2262 }
2264 /* draw that picture thing ... */
2265 int
2266 graph_paint(image_desc_t *im, char ***calcpr)
2267 {
2268 int i,ii;
2269 int lazy = lazy_check(im);
2270 int piechart = 0;
2271 double PieStart=0.0;
2272 FILE *fo;
2273 gfx_node_t *node;
2275 double areazero = 0.0;
2276 enum gf_en stack_gf = GF_PRINT;
2277 graph_desc_t *lastgdes = NULL;
2279 /* if we are lazy and there is nothing to PRINT ... quit now */
2280 if (lazy && im->prt_c==0) return 0;
2282 /* pull the data from the rrd files ... */
2284 if(data_fetch(im)==-1)
2285 return -1;
2287 /* evaluate VDEF and CDEF operations ... */
2288 if(data_calc(im)==-1)
2289 return -1;
2291 /* check if we need to draw a piechart */
2292 for(i=0;i<im->gdes_c;i++){
2293 if (im->gdes[i].gf == GF_PART) {
2294 piechart=1;
2295 break;
2296 }
2297 }
2299 /* calculate and PRINT and GPRINT definitions. We have to do it at
2300 * this point because it will affect the length of the legends
2301 * if there are no graph elements we stop here ...
2302 * if we are lazy, try to quit ...
2303 */
2304 i=print_calc(im,calcpr);
2305 if(i<0) return -1;
2306 if(((i==0)&&(piechart==0)) || lazy) return 0;
2308 /* If there's only the pie chart to draw, signal this */
2309 if (i==0) piechart=2;
2311 /* get actual drawing data and find min and max values*/
2312 if(data_proc(im)==-1)
2313 return -1;
2315 if(!im->logarithmic){si_unit(im);} /* identify si magnitude Kilo, Mega Giga ? */
2317 if(!im->rigid && ! im->logarithmic)
2318 expand_range(im); /* make sure the upper and lower limit are
2319 sensible values */
2321 if (!calc_horizontal_grid(im))
2322 return -1;
2324 if (im->gridfit)
2325 apply_gridfit(im);
2328 /**************************************************************
2329 *** Calculating sizes and locations became a bit confusing ***
2330 *** so I moved this into a separate function. ***
2331 **************************************************************/
2332 if(graph_size_location(im,i,piechart)==-1)
2333 return -1;
2335 /* the actual graph is created by going through the individual
2336 graph elements and then drawing them */
2338 node=gfx_new_area ( im->canvas,
2339 0, 0,
2340 im->ximg, 0,
2341 im->ximg, im->yimg,
2342 im->graph_col[GRC_BACK]);
2344 gfx_add_point(node,0, im->yimg);
2346 if (piechart != 2) {
2347 node=gfx_new_area ( im->canvas,
2348 im->xorigin, im->yorigin,
2349 im->xorigin + im->xsize, im->yorigin,
2350 im->xorigin + im->xsize, im->yorigin-im->ysize,
2351 im->graph_col[GRC_CANVAS]);
2353 gfx_add_point(node,im->xorigin, im->yorigin - im->ysize);
2355 if (im->minval > 0.0)
2356 areazero = im->minval;
2357 if (im->maxval < 0.0)
2358 areazero = im->maxval;
2359 if( !(im->extra_flags & ONLY_GRAPH) )
2360 axis_paint(im);
2361 }
2363 if (piechart) {
2364 pie_part(im,im->graph_col[GRC_CANVAS],im->pie_x,im->pie_y,im->piesize*0.5,0,2*M_PI);
2365 }
2367 for(i=0;i<im->gdes_c;i++){
2368 switch(im->gdes[i].gf){
2369 case GF_CDEF:
2370 case GF_VDEF:
2371 case GF_DEF:
2372 case GF_PRINT:
2373 case GF_GPRINT:
2374 case GF_COMMENT:
2375 case GF_HRULE:
2376 case GF_VRULE:
2377 case GF_XPORT:
2378 case GF_SHIFT:
2379 break;
2380 case GF_TICK:
2381 for (ii = 0; ii < im->xsize; ii++)
2382 {
2383 if (!isnan(im->gdes[i].p_data[ii]) &&
2384 im->gdes[i].p_data[ii] > 0.0)
2385 {
2386 /* generate a tick */
2387 gfx_new_line(im->canvas, im -> xorigin + ii,
2388 im -> yorigin - (im -> gdes[i].yrule * im -> ysize),
2389 im -> xorigin + ii,
2390 im -> yorigin,
2391 1.0,
2392 im -> gdes[i].col );
2393 }
2394 }
2395 break;
2396 case GF_LINE:
2397 case GF_AREA:
2398 stack_gf = im->gdes[i].gf;
2399 case GF_STACK:
2400 /* fix data points at oo and -oo */
2401 for(ii=0;ii<im->xsize;ii++){
2402 if (isinf(im->gdes[i].p_data[ii])){
2403 if (im->gdes[i].p_data[ii] > 0) {
2404 im->gdes[i].p_data[ii] = im->maxval ;
2405 } else {
2406 im->gdes[i].p_data[ii] = im->minval ;
2407 }
2409 }
2410 } /* for */
2412 if (im->gdes[i].col != 0x0){
2413 /* GF_LINE and friend */
2414 if(stack_gf == GF_LINE ){
2415 node = NULL;
2416 for(ii=1;ii<im->xsize;ii++){
2417 if ( ! isnan(im->gdes[i].p_data[ii-1])
2418 && ! isnan(im->gdes[i].p_data[ii])){
2419 if (node == NULL){
2420 node = gfx_new_line(im->canvas,
2421 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii-1]),
2422 ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]),
2423 im->gdes[i].linewidth,
2424 im->gdes[i].col);
2425 } else {
2426 gfx_add_point(node,ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]));
2427 }
2428 } else {
2429 node = NULL;
2430 }
2431 }
2432 } else {
2433 int area_start=-1;
2434 node = NULL;
2435 for(ii=1;ii<im->xsize;ii++){
2436 /* open an area */
2437 if ( ! isnan(im->gdes[i].p_data[ii-1])
2438 && ! isnan(im->gdes[i].p_data[ii])){
2439 if (node == NULL){
2440 float ybase = 0.0;
2441 /*
2442 if (im->gdes[i].gf == GF_STACK) {
2443 */
2444 if ( (im->gdes[i].gf == GF_STACK)
2445 || (im->gdes[i].stack) ) {
2447 ybase = ytr(im,lastgdes->p_data[ii-1]);
2448 } else {
2449 ybase = ytr(im,areazero);
2450 }
2451 area_start = ii-1;
2452 node = gfx_new_area(im->canvas,
2453 ii-1+im->xorigin,ybase,
2454 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii-1]),
2455 ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]),
2456 im->gdes[i].col
2457 );
2458 } else {
2459 gfx_add_point(node,ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]));
2460 }
2461 }
2463 if ( node != NULL && (ii+1==im->xsize || isnan(im->gdes[i].p_data[ii]) )){
2464 /* GF_AREA STACK type*/
2465 /*
2466 if (im->gdes[i].gf == GF_STACK ) {
2467 */
2468 if ( (im->gdes[i].gf == GF_STACK)
2469 || (im->gdes[i].stack) ) {
2470 int iii;
2471 for (iii=ii-1;iii>area_start;iii--){
2472 gfx_add_point(node,iii+im->xorigin,ytr(im,lastgdes->p_data[iii]));
2473 }
2474 } else {
2475 gfx_add_point(node,ii+im->xorigin,ytr(im,areazero));
2476 };
2477 node=NULL;
2478 };
2479 }
2480 } /* else GF_LINE */
2481 } /* if color != 0x0 */
2482 /* make sure we do not run into trouble when stacking on NaN */
2483 for(ii=0;ii<im->xsize;ii++){
2484 if (isnan(im->gdes[i].p_data[ii])) {
2485 if (lastgdes && (im->gdes[i].gf == GF_STACK)) {
2486 im->gdes[i].p_data[ii] = lastgdes->p_data[ii];
2487 } else {
2488 im->gdes[i].p_data[ii] = ytr(im,areazero);
2489 }
2490 }
2491 }
2492 lastgdes = &(im->gdes[i]);
2493 break;
2494 case GF_PART:
2495 if(isnan(im->gdes[i].yrule)) /* fetch variable */
2496 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2498 if (finite(im->gdes[i].yrule)) { /* even the fetched var can be NaN */
2499 pie_part(im,im->gdes[i].col,
2500 im->pie_x,im->pie_y,im->piesize*0.4,
2501 M_PI*2.0*PieStart/100.0,
2502 M_PI*2.0*(PieStart+im->gdes[i].yrule)/100.0);
2503 PieStart += im->gdes[i].yrule;
2504 }
2505 break;
2506 } /* switch */
2507 }
2508 if (piechart==2) {
2509 im->draw_x_grid=0;
2510 im->draw_y_grid=0;
2511 }
2512 /* grid_paint also does the text */
2513 if( !(im->extra_flags & ONLY_GRAPH) )
2514 grid_paint(im);
2516 /* the RULES are the last thing to paint ... */
2517 for(i=0;i<im->gdes_c;i++){
2519 switch(im->gdes[i].gf){
2520 case GF_HRULE:
2521 if(isnan(im->gdes[i].yrule)) { /* fetch variable */
2522 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2523 };
2524 if(im->gdes[i].yrule >= im->minval
2525 && im->gdes[i].yrule <= im->maxval)
2526 gfx_new_line(im->canvas,
2527 im->xorigin,ytr(im,im->gdes[i].yrule),
2528 im->xorigin+im->xsize,ytr(im,im->gdes[i].yrule),
2529 1.0,im->gdes[i].col);
2530 break;
2531 case GF_VRULE:
2532 if(im->gdes[i].xrule == 0) { /* fetch variable */
2533 im->gdes[i].xrule = im->gdes[im->gdes[i].vidx].vf.when;
2534 };
2535 if(im->gdes[i].xrule >= im->start
2536 && im->gdes[i].xrule <= im->end)
2537 gfx_new_line(im->canvas,
2538 xtr(im,im->gdes[i].xrule),im->yorigin,
2539 xtr(im,im->gdes[i].xrule),im->yorigin-im->ysize,
2540 1.0,im->gdes[i].col);
2541 break;
2542 default:
2543 break;
2544 }
2545 }
2548 if (strcmp(im->graphfile,"-")==0) {
2549 fo = im->graphhandle ? im->graphhandle : stdout;
2550 #ifdef WIN32
2551 /* Change translation mode for stdout to BINARY */
2552 _setmode( _fileno( fo ), O_BINARY );
2553 #endif
2554 } else {
2555 if ((fo = fopen(im->graphfile,"wb")) == NULL) {
2556 rrd_set_error("Opening '%s' for write: %s",im->graphfile,
2557 rrd_strerror(errno));
2558 return (-1);
2559 }
2560 }
2561 gfx_render (im->canvas,im->ximg,im->yimg,0x0,fo);
2562 if (strcmp(im->graphfile,"-") != 0)
2563 fclose(fo);
2564 return 0;
2565 }
2568 /*****************************************************
2569 * graph stuff
2570 *****************************************************/
2572 int
2573 gdes_alloc(image_desc_t *im){
2575 im->gdes_c++;
2576 if ((im->gdes = (graph_desc_t *) rrd_realloc(im->gdes, (im->gdes_c)
2577 * sizeof(graph_desc_t)))==NULL){
2578 rrd_set_error("realloc graph_descs");
2579 return -1;
2580 }
2583 im->gdes[im->gdes_c-1].step=im->step;
2584 im->gdes[im->gdes_c-1].stack=0;
2585 im->gdes[im->gdes_c-1].debug=0;
2586 im->gdes[im->gdes_c-1].start=im->start;
2587 im->gdes[im->gdes_c-1].end=im->end;
2588 im->gdes[im->gdes_c-1].vname[0]='\0';
2589 im->gdes[im->gdes_c-1].data=NULL;
2590 im->gdes[im->gdes_c-1].ds_namv=NULL;
2591 im->gdes[im->gdes_c-1].data_first=0;
2592 im->gdes[im->gdes_c-1].p_data=NULL;
2593 im->gdes[im->gdes_c-1].rpnp=NULL;
2594 im->gdes[im->gdes_c-1].shift=0;
2595 im->gdes[im->gdes_c-1].col = 0x0;
2596 im->gdes[im->gdes_c-1].legend[0]='\0';
2597 im->gdes[im->gdes_c-1].rrd[0]='\0';
2598 im->gdes[im->gdes_c-1].ds=-1;
2599 im->gdes[im->gdes_c-1].p_data=NULL;
2600 im->gdes[im->gdes_c-1].yrule=DNAN;
2601 im->gdes[im->gdes_c-1].xrule=0;
2602 return 0;
2603 }
2605 /* copies input untill the first unescaped colon is found
2606 or until input ends. backslashes have to be escaped as well */
2607 int
2608 scan_for_col(char *input, int len, char *output)
2609 {
2610 int inp,outp=0;
2611 for (inp=0;
2612 inp < len &&
2613 input[inp] != ':' &&
2614 input[inp] != '\0';
2615 inp++){
2616 if (input[inp] == '\\' &&
2617 input[inp+1] != '\0' &&
2618 (input[inp+1] == '\\' ||
2619 input[inp+1] == ':')){
2620 output[outp++] = input[++inp];
2621 }
2622 else {
2623 output[outp++] = input[inp];
2624 }
2625 }
2626 output[outp] = '\0';
2627 return inp;
2628 }
2629 /* Some surgery done on this function, it became ridiculously big.
2630 ** Things moved:
2631 ** - initializing now in rrd_graph_init()
2632 ** - options parsing now in rrd_graph_options()
2633 ** - script parsing now in rrd_graph_script()
2634 */
2635 int
2636 rrd_graph(int argc, char **argv, char ***prdata, int *xsize, int *ysize, FILE *stream)
2637 {
2638 image_desc_t im;
2640 rrd_graph_init(&im);
2641 im.graphhandle = stream;
2643 rrd_graph_options(argc,argv,&im);
2644 if (rrd_test_error()) {
2645 im_free(&im);
2646 return -1;
2647 }
2649 if (strlen(argv[optind])>=MAXPATH) {
2650 rrd_set_error("filename (including path) too long");
2651 im_free(&im);
2652 return -1;
2653 }
2654 strncpy(im.graphfile,argv[optind],MAXPATH-1);
2655 im.graphfile[MAXPATH-1]='\0';
2657 rrd_graph_script(argc,argv,&im,1);
2658 if (rrd_test_error()) {
2659 im_free(&im);
2660 return -1;
2661 }
2663 /* Everything is now read and the actual work can start */
2665 (*prdata)=NULL;
2666 if (graph_paint(&im,prdata)==-1){
2667 im_free(&im);
2668 return -1;
2669 }
2671 /* The image is generated and needs to be output.
2672 ** Also, if needed, print a line with information about the image.
2673 */
2675 *xsize=im.ximg;
2676 *ysize=im.yimg;
2677 if (im.imginfo) {
2678 char *filename;
2679 if (!(*prdata)) {
2680 /* maybe prdata is not allocated yet ... lets do it now */
2681 if ((*prdata = calloc(2,sizeof(char *)))==NULL) {
2682 rrd_set_error("malloc imginfo");
2683 return -1;
2684 };
2685 }
2686 if(((*prdata)[0] = malloc((strlen(im.imginfo)+200+strlen(im.graphfile))*sizeof(char)))
2687 ==NULL){
2688 rrd_set_error("malloc imginfo");
2689 return -1;
2690 }
2691 filename=im.graphfile+strlen(im.graphfile);
2692 while(filename > im.graphfile) {
2693 if (*(filename-1)=='/' || *(filename-1)=='\\' ) break;
2694 filename--;
2695 }
2697 sprintf((*prdata)[0],im.imginfo,filename,(long)(im.canvas->zoom*im.ximg),(long)(im.canvas->zoom*im.yimg));
2698 }
2699 im_free(&im);
2700 return 0;
2701 }
2703 void
2704 rrd_graph_init(image_desc_t *im)
2705 {
2706 unsigned int i;
2708 #ifdef HAVE_TZSET
2709 tzset();
2710 #endif
2711 #ifdef HAVE_SETLOCALE
2712 setlocale(LC_TIME,"");
2713 #endif
2715 im->xlab_user.minsec = -1;
2716 im->ximg=0;
2717 im->yimg=0;
2718 im->xsize = 400;
2719 im->ysize = 100;
2720 im->step = 0;
2721 im->ylegend[0] = '\0';
2722 im->title[0] = '\0';
2723 im->minval = DNAN;
2724 im->maxval = DNAN;
2725 im->unitsexponent= 9999;
2726 im->extra_flags= 0;
2727 im->rigid = 0;
2728 im->gridfit = 1;
2729 im->imginfo = NULL;
2730 im->lazy = 0;
2731 im->logarithmic = 0;
2732 im->ygridstep = DNAN;
2733 im->draw_x_grid = 1;
2734 im->draw_y_grid = 1;
2735 im->base = 1000;
2736 im->prt_c = 0;
2737 im->gdes_c = 0;
2738 im->gdes = NULL;
2739 im->canvas = gfx_new_canvas();
2740 im->grid_dash_on = 1;
2741 im->grid_dash_off = 1;
2743 for(i=0;i<DIM(graph_col);i++)
2744 im->graph_col[i]=graph_col[i];
2745 #ifdef WIN32
2746 {
2747 char *windir;
2748 windir = getenv("windir");
2749 /* %windir% is something like D:\windows or C:\winnt */
2750 if (windir != NULL) {
2751 strcpy(rrd_win_default_font,windir);
2752 strcat(rrd_win_default_font,"\\fonts\\cour.ttf");
2753 for(i=0;i<DIM(text_prop);i++)
2754 text_prop[i].font = rrd_win_default_font;
2755 }
2756 }
2757 #endif
2758 for(i=0;i<DIM(text_prop);i++){
2759 im->text_prop[i].size = text_prop[i].size;
2760 im->text_prop[i].font = text_prop[i].font;
2761 }
2762 }
2764 void
2765 rrd_graph_options(int argc, char *argv[],image_desc_t *im)
2766 {
2767 int stroff;
2768 char *parsetime_error = NULL;
2769 char scan_gtm[12],scan_mtm[12],scan_ltm[12],col_nam[12];
2770 time_t start_tmp=0,end_tmp=0;
2771 long long_tmp;
2772 struct rrd_time_value start_tv, end_tv;
2773 gfx_color_t color;
2775 parsetime("end-24h", &start_tv);
2776 parsetime("now", &end_tv);
2778 while (1){
2779 static struct option long_options[] =
2780 {
2781 {"start", required_argument, 0, 's'},
2782 {"end", required_argument, 0, 'e'},
2783 {"x-grid", required_argument, 0, 'x'},
2784 {"y-grid", required_argument, 0, 'y'},
2785 {"vertical-label",required_argument,0,'v'},
2786 {"width", required_argument, 0, 'w'},
2787 {"height", required_argument, 0, 'h'},
2788 {"interlaced", no_argument, 0, 'i'},
2789 {"upper-limit",required_argument, 0, 'u'},
2790 {"lower-limit",required_argument, 0, 'l'},
2791 {"rigid", no_argument, 0, 'r'},
2792 {"base", required_argument, 0, 'b'},
2793 {"logarithmic",no_argument, 0, 'o'},
2794 {"color", required_argument, 0, 'c'},
2795 {"font", required_argument, 0, 'n'},
2796 {"title", required_argument, 0, 't'},
2797 {"imginfo", required_argument, 0, 'f'},
2798 {"imgformat", required_argument, 0, 'a'},
2799 {"lazy", no_argument, 0, 'z'},
2800 {"zoom", required_argument, 0, 'm'},
2801 {"no-legend", no_argument, 0, 'g'},
2802 {"only-graph", no_argument, 0, 'j'},
2803 {"alt-y-grid", no_argument, 0, 'Y'},
2804 {"no-minor", no_argument, 0, 'I'},
2805 {"alt-autoscale", no_argument, 0, 'A'},
2806 {"alt-autoscale-max", no_argument, 0, 'M'},
2807 {"units-exponent",required_argument, 0, 'X'},
2808 {"step", required_argument, 0, 'S'},
2809 {"no-gridfit", no_argument, 0, 'N'},
2810 {0,0,0,0}};
2811 int option_index = 0;
2812 int opt;
2815 opt = getopt_long(argc, argv,
2816 "s:e:x:y:v:w:h:iu:l:rb:oc:n:m:t:f:a:I:zgjYAMX:S:N",
2817 long_options, &option_index);
2819 if (opt == EOF)
2820 break;
2822 switch(opt) {
2823 case 'I':
2824 im->extra_flags |= NOMINOR;
2825 break;
2826 case 'Y':
2827 im->extra_flags |= ALTYGRID;
2828 break;
2829 case 'A':
2830 im->extra_flags |= ALTAUTOSCALE;
2831 break;
2832 case 'M':
2833 im->extra_flags |= ALTAUTOSCALE_MAX;
2834 break;
2835 case 'j':
2836 im->extra_flags |= ONLY_GRAPH;
2837 break;
2838 case 'g':
2839 im->extra_flags |= NOLEGEND;
2840 break;
2841 case 'X':
2842 im->unitsexponent = atoi(optarg);
2843 break;
2844 case 'S':
2845 im->step = atoi(optarg);
2846 break;
2847 case 262:
2848 im->gridfit = 0;
2849 break;
2850 case 's':
2851 if ((parsetime_error = parsetime(optarg, &start_tv))) {
2852 rrd_set_error( "start time: %s", parsetime_error );
2853 return;
2854 }
2855 break;
2856 case 'e':
2857 if ((parsetime_error = parsetime(optarg, &end_tv))) {
2858 rrd_set_error( "end time: %s", parsetime_error );
2859 return;
2860 }
2861 break;
2862 case 'x':
2863 if(strcmp(optarg,"none") == 0){
2864 im->draw_x_grid=0;
2865 break;
2866 };
2868 if(sscanf(optarg,
2869 "%10[A-Z]:%ld:%10[A-Z]:%ld:%10[A-Z]:%ld:%ld:%n",
2870 scan_gtm,
2871 &im->xlab_user.gridst,
2872 scan_mtm,
2873 &im->xlab_user.mgridst,
2874 scan_ltm,
2875 &im->xlab_user.labst,
2876 &im->xlab_user.precis,
2877 &stroff) == 7 && stroff != 0){
2878 strncpy(im->xlab_form, optarg+stroff, sizeof(im->xlab_form) - 1);
2879 if((int)(im->xlab_user.gridtm = tmt_conv(scan_gtm)) == -1){
2880 rrd_set_error("unknown keyword %s",scan_gtm);
2881 return;
2882 } else if ((int)(im->xlab_user.mgridtm = tmt_conv(scan_mtm)) == -1){
2883 rrd_set_error("unknown keyword %s",scan_mtm);
2884 return;
2885 } else if ((int)(im->xlab_user.labtm = tmt_conv(scan_ltm)) == -1){
2886 rrd_set_error("unknown keyword %s",scan_ltm);
2887 return;
2888 }
2889 im->xlab_user.minsec = 1;
2890 im->xlab_user.stst = im->xlab_form;
2891 } else {
2892 rrd_set_error("invalid x-grid format");
2893 return;
2894 }
2895 break;
2896 case 'y':
2898 if(strcmp(optarg,"none") == 0){
2899 im->draw_y_grid=0;
2900 break;
2901 };
2903 if(sscanf(optarg,
2904 "%lf:%d",
2905 &im->ygridstep,
2906 &im->ylabfact) == 2) {
2907 if(im->ygridstep<=0){
2908 rrd_set_error("grid step must be > 0");
2909 return;
2910 } else if (im->ylabfact < 1){
2911 rrd_set_error("label factor must be > 0");
2912 return;
2913 }
2914 } else {
2915 rrd_set_error("invalid y-grid format");
2916 return;
2917 }
2918 break;
2919 case 'v':
2920 strncpy(im->ylegend,optarg,150);
2921 im->ylegend[150]='\0';
2922 break;
2923 case 'u':
2924 im->maxval = atof(optarg);
2925 break;
2926 case 'l':
2927 im->minval = atof(optarg);
2928 break;
2929 case 'b':
2930 im->base = atol(optarg);
2931 if(im->base != 1024 && im->base != 1000 ){
2932 rrd_set_error("the only sensible value for base apart from 1000 is 1024");
2933 return;
2934 }
2935 break;
2936 case 'w':
2937 long_tmp = atol(optarg);
2938 if (long_tmp < 10) {
2939 rrd_set_error("width below 10 pixels");
2940 return;
2941 }
2942 im->xsize = long_tmp;
2943 break;
2944 case 'h':
2945 long_tmp = atol(optarg);
2946 if (long_tmp < 10) {
2947 rrd_set_error("height below 10 pixels");
2948 return;
2949 }
2950 im->ysize = long_tmp;
2951 break;
2952 case 'i':
2953 im->canvas->interlaced = 1;
2954 break;
2955 case 'r':
2956 im->rigid = 1;
2957 break;
2958 case 'f':
2959 im->imginfo = optarg;
2960 break;
2961 case 'a':
2962 if((int)(im->canvas->imgformat = if_conv(optarg)) == -1) {
2963 rrd_set_error("unsupported graphics format '%s'",optarg);
2964 return;
2965 }
2966 break;
2967 case 'z':
2968 im->lazy = 1;
2969 break;
2970 case 'o':
2971 im->logarithmic = 1;
2972 if (isnan(im->minval))
2973 im->minval=1;
2974 break;
2975 case 'c':
2976 if(sscanf(optarg,
2977 "%10[A-Z]#%8lx",
2978 col_nam,&color) == 2){
2979 int ci;
2980 if((ci=grc_conv(col_nam)) != -1){
2981 im->graph_col[ci]=color;
2982 } else {
2983 rrd_set_error("invalid color name '%s'",col_nam);
2984 }
2985 } else {
2986 rrd_set_error("invalid color def format");
2987 return;
2988 }
2989 break;
2990 case 'n':{
2991 /* originally this used char *prop = "" and
2992 ** char *font = "dummy" however this results
2993 ** in a SEG fault, at least on RH7.1
2994 **
2995 ** The current implementation isn't proper
2996 ** either, font is never freed and prop uses
2997 ** a fixed width string
2998 */
2999 char prop[100];
3000 double size = 1;
3001 char *font;
3003 font=malloc(255);
3004 if(sscanf(optarg,
3005 "%10[A-Z]:%lf:%s",
3006 prop,&size,font) == 3){
3007 int sindex;
3008 if((sindex=text_prop_conv(prop)) != -1){
3009 im->text_prop[sindex].size=size;
3010 im->text_prop[sindex].font=font;
3011 if (sindex==0) { /* the default */
3012 im->text_prop[TEXT_PROP_TITLE].size=size;
3013 im->text_prop[TEXT_PROP_TITLE].font=font;
3014 im->text_prop[TEXT_PROP_AXIS].size=size;
3015 im->text_prop[TEXT_PROP_AXIS].font=font;
3016 im->text_prop[TEXT_PROP_UNIT].size=size;
3017 im->text_prop[TEXT_PROP_UNIT].font=font;
3018 im->text_prop[TEXT_PROP_LEGEND].size=size;
3019 im->text_prop[TEXT_PROP_LEGEND].font=font;
3020 }
3021 } else {
3022 rrd_set_error("invalid fonttag '%s'",prop);
3023 return;
3024 }
3025 } else {
3026 rrd_set_error("invalid text property format");
3027 return;
3028 }
3029 break;
3030 }
3031 case 'm':
3032 im->canvas->zoom = atof(optarg);
3033 if (im->canvas->zoom <= 0.0) {
3034 rrd_set_error("zoom factor must be > 0");
3035 return;
3036 }
3037 break;
3038 case 't':
3039 strncpy(im->title,optarg,150);
3040 im->title[150]='\0';
3041 break;
3043 case '?':
3044 if (optopt != 0)
3045 rrd_set_error("unknown option '%c'", optopt);
3046 else
3047 rrd_set_error("unknown option '%s'",argv[optind-1]);
3048 return;
3049 }
3050 }
3052 if (optind >= argc) {
3053 rrd_set_error("missing filename");
3054 return;
3055 }
3057 if (im->logarithmic == 1 && (im->minval <= 0 || isnan(im->minval))){
3058 rrd_set_error("for a logarithmic yaxis you must specify a lower-limit > 0");
3059 return;
3060 }
3062 if (proc_start_end(&start_tv,&end_tv,&start_tmp,&end_tmp) == -1){
3063 /* error string is set in parsetime.c */
3064 return;
3065 }
3067 if (start_tmp < 3600*24*365*10){
3068 rrd_set_error("the first entry to fetch should be after 1980 (%ld)",start_tmp);
3069 return;
3070 }
3072 if (end_tmp < start_tmp) {
3073 rrd_set_error("start (%ld) should be less than end (%ld)",
3074 start_tmp, end_tmp);
3075 return;
3076 }
3078 im->start = start_tmp;
3079 im->end = end_tmp;
3080 im->step = max((long)im->step, (im->end-im->start)/im->xsize);
3081 }
3083 int
3084 rrd_graph_check_vname(image_desc_t *im, char *varname, char *err)
3085 {
3086 if ((im->gdes[im->gdes_c-1].vidx=find_var(im,varname))==-1) {
3087 rrd_set_error("Unknown variable '%s' in %s",varname,err);
3088 return -1;
3089 }
3090 return 0;
3091 }
3092 int
3093 rrd_graph_color(image_desc_t *im, char *var, char *err, int optional)
3094 {
3095 char *color;
3096 graph_desc_t *gdp=&im->gdes[im->gdes_c-1];
3098 color=strstr(var,"#");
3099 if (color==NULL) {
3100 if (optional==0) {
3101 rrd_set_error("Found no color in %s",err);
3102 return 0;
3103 }
3104 return 0;
3105 } else {
3106 int n=0;
3107 char *rest;
3108 gfx_color_t col;
3110 rest=strstr(color,":");
3111 if (rest!=NULL)
3112 n=rest-color;
3113 else
3114 n=strlen(color);
3116 switch (n) {
3117 case 7:
3118 sscanf(color,"#%6lx%n",&col,&n);
3119 col = (col << 8) + 0xff /* shift left by 8 */;
3120 if (n!=7) rrd_set_error("Color problem in %s",err);
3121 break;
3122 case 9:
3123 sscanf(color,"#%8lx%n",&col,&n);
3124 if (n==9) break;
3125 default:
3126 rrd_set_error("Color problem in %s",err);
3127 }
3128 if (rrd_test_error()) return 0;
3129 gdp->col = col;
3130 return n;
3131 }
3132 }
3133 int
3134 rrd_graph_legend(graph_desc_t *gdp, char *line)
3135 {
3136 int i;
3138 i=scan_for_col(line,FMT_LEG_LEN,gdp->legend);
3140 return (strlen(&line[i])==0);
3141 }
3144 int bad_format(char *fmt) {
3145 char *ptr;
3146 int n=0;
3147 ptr = fmt;
3148 while (*ptr != '\0')
3149 if (*ptr++ == '%') {
3151 /* line cannot end with percent char */
3152 if (*ptr == '\0') return 1;
3154 /* '%s', '%S' and '%%' are allowed */
3155 if (*ptr == 's' || *ptr == 'S' || *ptr == '%') ptr++;
3157 /* or else '% 6.2lf' and such are allowed */
3158 else {
3160 /* optional padding character */
3161 if (*ptr == ' ' || *ptr == '+' || *ptr == '-') ptr++;
3163 /* This should take care of 'm.n' with all three optional */
3164 while (*ptr >= '0' && *ptr <= '9') ptr++;
3165 if (*ptr == '.') ptr++;
3166 while (*ptr >= '0' && *ptr <= '9') ptr++;
3168 /* Either 'le', 'lf' or 'lg' must follow here */
3169 if (*ptr++ != 'l') return 1;
3170 if (*ptr == 'e' || *ptr == 'f' || *ptr == 'g') ptr++;
3171 else return 1;
3172 n++;
3173 }
3174 }
3176 return (n!=1);
3177 }
3180 int
3181 vdef_parse(gdes,str)
3182 struct graph_desc_t *gdes;
3183 char *str;
3184 {
3185 /* A VDEF currently is either "func" or "param,func"
3186 * so the parsing is rather simple. Change if needed.
3187 */
3188 double param;
3189 char func[30];
3190 int n;
3192 n=0;
3193 sscanf(str,"%le,%29[A-Z]%n",¶m,func,&n);
3194 if (n== (int)strlen(str)) { /* matched */
3195 ;
3196 } else {
3197 n=0;
3198 sscanf(str,"%29[A-Z]%n",func,&n);
3199 if (n== (int)strlen(str)) { /* matched */
3200 param=DNAN;
3201 } else {
3202 rrd_set_error("Unknown function string '%s' in VDEF '%s'"
3203 ,str
3204 ,gdes->vname
3205 );
3206 return -1;
3207 }
3208 }
3209 if (!strcmp("PERCENT",func)) gdes->vf.op = VDEF_PERCENT;
3210 else if (!strcmp("MAXIMUM",func)) gdes->vf.op = VDEF_MAXIMUM;
3211 else if (!strcmp("AVERAGE",func)) gdes->vf.op = VDEF_AVERAGE;
3212 else if (!strcmp("MINIMUM",func)) gdes->vf.op = VDEF_MINIMUM;
3213 else if (!strcmp("TOTAL", func)) gdes->vf.op = VDEF_TOTAL;
3214 else if (!strcmp("FIRST", func)) gdes->vf.op = VDEF_FIRST;
3215 else if (!strcmp("LAST", func)) gdes->vf.op = VDEF_LAST;
3216 else {
3217 rrd_set_error("Unknown function '%s' in VDEF '%s'\n"
3218 ,func
3219 ,gdes->vname
3220 );
3221 return -1;
3222 };
3224 switch (gdes->vf.op) {
3225 case VDEF_PERCENT:
3226 if (isnan(param)) { /* no parameter given */
3227 rrd_set_error("Function '%s' needs parameter in VDEF '%s'\n"
3228 ,func
3229 ,gdes->vname
3230 );
3231 return -1;
3232 };
3233 if (param>=0.0 && param<=100.0) {
3234 gdes->vf.param = param;
3235 gdes->vf.val = DNAN; /* undefined */
3236 gdes->vf.when = 0; /* undefined */
3237 } else {
3238 rrd_set_error("Parameter '%f' out of range in VDEF '%s'\n"
3239 ,param
3240 ,gdes->vname
3241 );
3242 return -1;
3243 };
3244 break;
3245 case VDEF_MAXIMUM:
3246 case VDEF_AVERAGE:
3247 case VDEF_MINIMUM:
3248 case VDEF_TOTAL:
3249 case VDEF_FIRST:
3250 case VDEF_LAST:
3251 if (isnan(param)) {
3252 gdes->vf.param = DNAN;
3253 gdes->vf.val = DNAN;
3254 gdes->vf.when = 0;
3255 } else {
3256 rrd_set_error("Function '%s' needs no parameter in VDEF '%s'\n"
3257 ,func
3258 ,gdes->vname
3259 );
3260 return -1;
3261 };
3262 break;
3263 };
3264 return 0;
3265 }
3268 int
3269 vdef_calc(im,gdi)
3270 image_desc_t *im;
3271 int gdi;
3272 {
3273 graph_desc_t *src,*dst;
3274 rrd_value_t *data;
3275 long step,steps;
3277 dst = &im->gdes[gdi];
3278 src = &im->gdes[dst->vidx];
3279 data = src->data + src->ds;
3280 steps = (src->end - src->start) / src->step;
3282 #if 0
3283 printf("DEBUG: start == %lu, end == %lu, %lu steps\n"
3284 ,src->start
3285 ,src->end
3286 ,steps
3287 );
3288 #endif
3290 switch (dst->vf.op) {
3291 case VDEF_PERCENT: {
3292 rrd_value_t * array;
3293 int field;
3296 if ((array = malloc(steps*sizeof(double)))==NULL) {
3297 rrd_set_error("malloc VDEV_PERCENT");
3298 return -1;
3299 }
3300 for (step=0;step < steps; step++) {
3301 array[step]=data[step*src->ds_cnt];
3302 }
3303 qsort(array,step,sizeof(double),vdef_percent_compar);
3305 field = (steps-1)*dst->vf.param/100;
3306 dst->vf.val = array[field];
3307 dst->vf.when = 0; /* no time component */
3308 free(array);
3309 #if 0
3310 for(step=0;step<steps;step++)
3311 printf("DEBUG: %3li:%10.2f %c\n",step,array[step],step==field?'*':' ');
3312 #endif
3313 }
3314 break;
3315 case VDEF_MAXIMUM:
3316 step=0;
3317 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3318 if (step == steps) {
3319 dst->vf.val = DNAN;
3320 dst->vf.when = 0;
3321 } else {
3322 dst->vf.val = data[step*src->ds_cnt];
3323 dst->vf.when = src->start + (step+1)*src->step;
3324 }
3325 while (step != steps) {
3326 if (finite(data[step*src->ds_cnt])) {
3327 if (data[step*src->ds_cnt] > dst->vf.val) {
3328 dst->vf.val = data[step*src->ds_cnt];
3329 dst->vf.when = src->start + (step+1)*src->step;
3330 }
3331 }
3332 step++;
3333 }
3334 break;
3335 case VDEF_TOTAL:
3336 case VDEF_AVERAGE: {
3337 int cnt=0;
3338 double sum=0.0;
3339 for (step=0;step<steps;step++) {
3340 if (finite(data[step*src->ds_cnt])) {
3341 sum += data[step*src->ds_cnt];
3342 cnt ++;
3343 };
3344 }
3345 if (cnt) {
3346 if (dst->vf.op == VDEF_TOTAL) {
3347 dst->vf.val = sum*src->step;
3348 dst->vf.when = cnt*src->step; /* not really "when" */
3349 } else {
3350 dst->vf.val = sum/cnt;
3351 dst->vf.when = 0; /* no time component */
3352 };
3353 } else {
3354 dst->vf.val = DNAN;
3355 dst->vf.when = 0;
3356 }
3357 }
3358 break;
3359 case VDEF_MINIMUM:
3360 step=0;
3361 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3362 if (step == steps) {
3363 dst->vf.val = DNAN;
3364 dst->vf.when = 0;
3365 } else {
3366 dst->vf.val = data[step*src->ds_cnt];
3367 dst->vf.when = src->start + (step+1)*src->step;
3368 }
3369 while (step != steps) {
3370 if (finite(data[step*src->ds_cnt])) {
3371 if (data[step*src->ds_cnt] < dst->vf.val) {
3372 dst->vf.val = data[step*src->ds_cnt];
3373 dst->vf.when = src->start + (step+1)*src->step;
3374 }
3375 }
3376 step++;
3377 }
3378 break;
3379 case VDEF_FIRST:
3380 /* The time value returned here is one step before the
3381 * actual time value. This is the start of the first
3382 * non-NaN interval.
3383 */
3384 step=0;
3385 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3386 if (step == steps) { /* all entries were NaN */
3387 dst->vf.val = DNAN;
3388 dst->vf.when = 0;
3389 } else {
3390 dst->vf.val = data[step*src->ds_cnt];
3391 dst->vf.when = src->start + step*src->step;
3392 }
3393 break;
3394 case VDEF_LAST:
3395 /* The time value returned here is the
3396 * actual time value. This is the end of the last
3397 * non-NaN interval.
3398 */
3399 step=steps-1;
3400 while (step >= 0 && isnan(data[step*src->ds_cnt])) step--;
3401 if (step < 0) { /* all entries were NaN */
3402 dst->vf.val = DNAN;
3403 dst->vf.when = 0;
3404 } else {
3405 dst->vf.val = data[step*src->ds_cnt];
3406 dst->vf.when = src->start + (step+1)*src->step;
3407 }
3408 break;
3409 }
3410 return 0;
3411 }
3413 /* NaN < -INF < finite_values < INF */
3414 int
3415 vdef_percent_compar(a,b)
3416 const void *a,*b;
3417 {
3418 /* Equality is not returned; this doesn't hurt except
3419 * (maybe) for a little performance.
3420 */
3422 /* First catch NaN values. They are smallest */
3423 if (isnan( *(double *)a )) return -1;
3424 if (isnan( *(double *)b )) return 1;
3426 /* NaN doesn't reach this part so INF and -INF are extremes.
3427 * The sign from isinf() is compatible with the sign we return
3428 */
3429 if (isinf( *(double *)a )) return isinf( *(double *)a );
3430 if (isinf( *(double *)b )) return isinf( *(double *)b );
3432 /* If we reach this, both values must be finite */
3433 if ( *(double *)a < *(double *)b ) return -1; else return 1;
3434 }