be5574133d6171310989a33356e785bce5a4d3f0
1 /****************************************************************************
2 * RRDtool 1.2.6 Copyright by Tobi Oetiker, 1997-2005
3 ****************************************************************************
4 * rrd__graph.c produce graphs from data in rrdfiles
5 ****************************************************************************/
8 #include <sys/stat.h>
10 #include "rrd_tool.h"
12 #if defined(WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
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 */
31 #ifndef RRD_DEFAULT_FONT
32 /* there is special code later to pick Cour.ttf when running on windows */
33 #define RRD_DEFAULT_FONT "DejaVuSansMono-Roman.ttf"
34 #endif
36 text_prop_t text_prop[] = {
37 { 8.0, RRD_DEFAULT_FONT }, /* default */
38 { 9.0, RRD_DEFAULT_FONT }, /* title */
39 { 7.0, RRD_DEFAULT_FONT }, /* axis */
40 { 8.0, RRD_DEFAULT_FONT }, /* unit */
41 { 8.0, RRD_DEFAULT_FONT } /* legend */
42 };
44 xlab_t xlab[] = {
45 {0, TMT_SECOND,30, TMT_MINUTE,5, TMT_MINUTE,5, 0,"%H:%M"},
46 {2, TMT_MINUTE,1, TMT_MINUTE,5, TMT_MINUTE,5, 0,"%H:%M"},
47 {5, TMT_MINUTE,2, TMT_MINUTE,10, TMT_MINUTE,10, 0,"%H:%M"},
48 {10, TMT_MINUTE,5, TMT_MINUTE,20, TMT_MINUTE,20, 0,"%H:%M"},
49 {30, TMT_MINUTE,10, TMT_HOUR,1, TMT_HOUR,1, 0,"%H:%M"},
50 {60, TMT_MINUTE,30, TMT_HOUR,2, TMT_HOUR,2, 0,"%H:%M"},
51 {180, TMT_HOUR,1, TMT_HOUR,6, TMT_HOUR,6, 0,"%H:%M"},
52 /*{300, TMT_HOUR,3, TMT_HOUR,12, TMT_HOUR,12, 12*3600,"%a %p"}, this looks silly*/
53 {600, TMT_HOUR,6, TMT_DAY,1, TMT_DAY,1, 24*3600,"%a"},
54 {1800, TMT_HOUR,12, TMT_DAY,1, TMT_DAY,2, 24*3600,"%a"},
55 {3600, TMT_DAY,1, TMT_WEEK,1, TMT_WEEK,1, 7*24*3600,"Week %V"},
56 {3*3600, TMT_WEEK,1, TMT_MONTH,1, TMT_WEEK,2, 7*24*3600,"Week %V"},
57 {6*3600, TMT_MONTH,1, TMT_MONTH,1, TMT_MONTH,1, 30*24*3600,"%b"},
58 {48*3600, TMT_MONTH,1, TMT_MONTH,3, TMT_MONTH,3, 30*24*3600,"%b"},
59 {10*24*3600, TMT_YEAR,1, TMT_YEAR,1, TMT_YEAR,1, 365*24*3600,"%y"},
60 {-1,TMT_MONTH,0,TMT_MONTH,0,TMT_MONTH,0,0,""}
61 };
63 /* sensible logarithmic y label intervals ...
64 the first element of each row defines the possible starting points on the
65 y axis ... the other specify the */
67 double yloglab[][12]= {{ 1e9, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
68 { 1e3, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
69 { 1e1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
70 /* { 1e1, 1, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, */
71 { 1e1, 1, 2.5, 5, 7.5, 0, 0, 0, 0, 0, 0, 0 },
72 { 1e1, 1, 2, 4, 6, 8, 0, 0, 0, 0, 0, 0 },
73 { 1e1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0 },
74 { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }};
76 /* sensible y label intervals ...*/
78 ylab_t ylab[]= {
79 {0.1, {1,2, 5,10}},
80 {0.2, {1,5,10,20}},
81 {0.5, {1,2, 4,10}},
82 {1.0, {1,2, 5,10}},
83 {2.0, {1,5,10,20}},
84 {5.0, {1,2, 4,10}},
85 {10.0, {1,2, 5,10}},
86 {20.0, {1,5,10,20}},
87 {50.0, {1,2, 4,10}},
88 {100.0, {1,2, 5,10}},
89 {200.0, {1,5,10,20}},
90 {500.0, {1,2, 4,10}},
91 {0.0, {0,0,0,0}}};
94 gfx_color_t graph_col[] = /* default colors */
95 { 0xFFFFFFFF, /* canvas */
96 0xF0F0F0FF, /* background */
97 0xD0D0D0FF, /* shade A */
98 0xA0A0A0FF, /* shade B */
99 0x90909080, /* grid */
100 0xE0505080, /* major grid */
101 0x000000FF, /* font */
102 0x802020FF, /* arrow */
103 0x202020FF /* axis */
104 };
107 /* #define DEBUG */
109 #ifdef DEBUG
110 # define DPRINT(x) (void)(printf x, printf("\n"))
111 #else
112 # define DPRINT(x)
113 #endif
116 /* initialize with xtr(im,0); */
117 int
118 xtr(image_desc_t *im,time_t mytime){
119 static double pixie;
120 if (mytime==0){
121 pixie = (double) im->xsize / (double)(im->end - im->start);
122 return im->xorigin;
123 }
124 return (int)((double)im->xorigin
125 + pixie * ( mytime - im->start ) );
126 }
128 /* translate data values into y coordinates */
129 double
130 ytr(image_desc_t *im, double value){
131 static double pixie;
132 double yval;
133 if (isnan(value)){
134 if(!im->logarithmic)
135 pixie = (double) im->ysize / (im->maxval - im->minval);
136 else
137 pixie = (double) im->ysize / (log10(im->maxval) - log10(im->minval));
138 yval = im->yorigin;
139 } else if(!im->logarithmic) {
140 yval = im->yorigin - pixie * (value - im->minval);
141 } else {
142 if (value < im->minval) {
143 yval = im->yorigin;
144 } else {
145 yval = im->yorigin - pixie * (log10(value) - log10(im->minval));
146 }
147 }
148 /* make sure we don't return anything too unreasonable. GD lib can
149 get terribly slow when drawing lines outside its scope. This is
150 especially problematic in connection with the rigid option */
151 if (! im->rigid) {
152 /* keep yval as-is */
153 } else if (yval > im->yorigin) {
154 yval = im->yorigin;
155 } else if (yval < im->yorigin - im->ysize){
156 yval = im->yorigin - im->ysize;
157 }
158 return yval;
159 }
163 /* conversion function for symbolic entry names */
166 #define conv_if(VV,VVV) \
167 if (strcmp(#VV, string) == 0) return VVV ;
169 enum gf_en gf_conv(char *string){
171 conv_if(PRINT,GF_PRINT)
172 conv_if(GPRINT,GF_GPRINT)
173 conv_if(COMMENT,GF_COMMENT)
174 conv_if(HRULE,GF_HRULE)
175 conv_if(VRULE,GF_VRULE)
176 conv_if(LINE,GF_LINE)
177 conv_if(AREA,GF_AREA)
178 conv_if(STACK,GF_STACK)
179 conv_if(TICK,GF_TICK)
180 conv_if(DEF,GF_DEF)
181 conv_if(CDEF,GF_CDEF)
182 conv_if(VDEF,GF_VDEF)
183 #ifdef WITH_PIECHART
184 conv_if(PART,GF_PART)
185 #endif
186 conv_if(XPORT,GF_XPORT)
187 conv_if(SHIFT,GF_SHIFT)
189 return (-1);
190 }
192 enum gfx_if_en if_conv(char *string){
194 conv_if(PNG,IF_PNG)
195 conv_if(SVG,IF_SVG)
196 conv_if(EPS,IF_EPS)
197 conv_if(PDF,IF_PDF)
199 return (-1);
200 }
202 enum tmt_en tmt_conv(char *string){
204 conv_if(SECOND,TMT_SECOND)
205 conv_if(MINUTE,TMT_MINUTE)
206 conv_if(HOUR,TMT_HOUR)
207 conv_if(DAY,TMT_DAY)
208 conv_if(WEEK,TMT_WEEK)
209 conv_if(MONTH,TMT_MONTH)
210 conv_if(YEAR,TMT_YEAR)
211 return (-1);
212 }
214 enum grc_en grc_conv(char *string){
216 conv_if(BACK,GRC_BACK)
217 conv_if(CANVAS,GRC_CANVAS)
218 conv_if(SHADEA,GRC_SHADEA)
219 conv_if(SHADEB,GRC_SHADEB)
220 conv_if(GRID,GRC_GRID)
221 conv_if(MGRID,GRC_MGRID)
222 conv_if(FONT,GRC_FONT)
223 conv_if(ARROW,GRC_ARROW)
224 conv_if(AXIS,GRC_AXIS)
226 return -1;
227 }
229 enum text_prop_en text_prop_conv(char *string){
231 conv_if(DEFAULT,TEXT_PROP_DEFAULT)
232 conv_if(TITLE,TEXT_PROP_TITLE)
233 conv_if(AXIS,TEXT_PROP_AXIS)
234 conv_if(UNIT,TEXT_PROP_UNIT)
235 conv_if(LEGEND,TEXT_PROP_LEGEND)
236 return -1;
237 }
240 #undef conv_if
242 int
243 im_free(image_desc_t *im)
244 {
245 unsigned long i,ii;
247 if (im == NULL) return 0;
248 for(i=0;i<(unsigned)im->gdes_c;i++){
249 if (im->gdes[i].data_first){
250 /* careful here, because a single pointer can occur several times */
251 free (im->gdes[i].data);
252 if (im->gdes[i].ds_namv){
253 for (ii=0;ii<im->gdes[i].ds_cnt;ii++)
254 free(im->gdes[i].ds_namv[ii]);
255 free(im->gdes[i].ds_namv);
256 }
257 }
258 free (im->gdes[i].p_data);
259 free (im->gdes[i].rpnp);
260 }
261 free(im->gdes);
262 gfx_destroy(im->canvas);
263 return 0;
264 }
266 /* find SI magnitude symbol for the given number*/
267 void
268 auto_scale(
269 image_desc_t *im, /* image description */
270 double *value,
271 char **symb_ptr,
272 double *magfact
273 )
274 {
276 char *symbol[] = {"a", /* 10e-18 Atto */
277 "f", /* 10e-15 Femto */
278 "p", /* 10e-12 Pico */
279 "n", /* 10e-9 Nano */
280 "u", /* 10e-6 Micro */
281 "m", /* 10e-3 Milli */
282 " ", /* Base */
283 "k", /* 10e3 Kilo */
284 "M", /* 10e6 Mega */
285 "G", /* 10e9 Giga */
286 "T", /* 10e12 Tera */
287 "P", /* 10e15 Peta */
288 "E"};/* 10e18 Exa */
290 int symbcenter = 6;
291 int sindex;
293 if (*value == 0.0 || isnan(*value) ) {
294 sindex = 0;
295 *magfact = 1.0;
296 } else {
297 sindex = floor(log(fabs(*value))/log((double)im->base));
298 *magfact = pow((double)im->base, (double)sindex);
299 (*value) /= (*magfact);
300 }
301 if ( sindex <= symbcenter && sindex >= -symbcenter) {
302 (*symb_ptr) = symbol[sindex+symbcenter];
303 }
304 else {
305 (*symb_ptr) = "?";
306 }
307 }
310 /* find SI magnitude symbol for the numbers on the y-axis*/
311 void
312 si_unit(
313 image_desc_t *im /* image description */
314 )
315 {
317 char symbol[] = {'a', /* 10e-18 Atto */
318 'f', /* 10e-15 Femto */
319 'p', /* 10e-12 Pico */
320 'n', /* 10e-9 Nano */
321 'u', /* 10e-6 Micro */
322 'm', /* 10e-3 Milli */
323 ' ', /* Base */
324 'k', /* 10e3 Kilo */
325 'M', /* 10e6 Mega */
326 'G', /* 10e9 Giga */
327 'T', /* 10e12 Tera */
328 'P', /* 10e15 Peta */
329 'E'};/* 10e18 Exa */
331 int symbcenter = 6;
332 double digits,viewdigits=0;
334 digits = floor( log( max( fabs(im->minval),fabs(im->maxval)))/log((double)im->base));
336 if (im->unitsexponent != 9999) {
337 /* unitsexponent = 9, 6, 3, 0, -3, -6, -9, etc */
338 viewdigits = floor(im->unitsexponent / 3);
339 } else {
340 viewdigits = digits;
341 }
343 im->magfact = pow((double)im->base , digits);
345 #ifdef DEBUG
346 printf("digits %6.3f im->magfact %6.3f\n",digits,im->magfact);
347 #endif
349 im->viewfactor = im->magfact / pow((double)im->base , viewdigits);
351 pow((double)im->base , viewdigits);
353 if ( ((viewdigits+symbcenter) < sizeof(symbol)) &&
354 ((viewdigits+symbcenter) >= 0) )
355 im->symbol = symbol[(int)viewdigits+symbcenter];
356 else
357 im->symbol = '?';
358 }
360 /* move min and max values around to become sensible */
362 void
363 expand_range(image_desc_t *im)
364 {
365 double sensiblevalues[] ={1000.0,900.0,800.0,750.0,700.0,
366 600.0,500.0,400.0,300.0,250.0,
367 200.0,125.0,100.0,90.0,80.0,
368 75.0,70.0,60.0,50.0,40.0,30.0,
369 25.0,20.0,10.0,9.0,8.0,
370 7.0,6.0,5.0,4.0,3.5,3.0,
371 2.5,2.0,1.8,1.5,1.2,1.0,
372 0.8,0.7,0.6,0.5,0.4,0.3,0.2,0.1,0.0,-1};
374 double scaled_min,scaled_max;
375 double adj;
376 int i;
380 #ifdef DEBUG
381 printf("Min: %6.2f Max: %6.2f MagFactor: %6.2f\n",
382 im->minval,im->maxval,im->magfact);
383 #endif
385 if (isnan(im->ygridstep)){
386 if(im->extra_flags & ALTAUTOSCALE) {
387 /* measure the amplitude of the function. Make sure that
388 graph boundaries are slightly higher then max/min vals
389 so we can see amplitude on the graph */
390 double delt, fact;
392 delt = im->maxval - im->minval;
393 adj = delt * 0.1;
394 fact = 2.0 * pow(10.0,
395 floor(log10(max(fabs(im->minval), fabs(im->maxval)))) - 2);
396 if (delt < fact) {
397 adj = (fact - delt) * 0.55;
398 #ifdef DEBUG
399 printf("Min: %6.2f Max: %6.2f delt: %6.2f fact: %6.2f adj: %6.2f\n", im->minval, im->maxval, delt, fact, adj);
400 #endif
401 }
402 im->minval -= adj;
403 im->maxval += adj;
404 }
405 else if(im->extra_flags & ALTAUTOSCALE_MAX) {
406 /* measure the amplitude of the function. Make sure that
407 graph boundaries are slightly higher than max vals
408 so we can see amplitude on the graph */
409 adj = (im->maxval - im->minval) * 0.1;
410 im->maxval += adj;
411 }
412 else {
413 scaled_min = im->minval / im->magfact;
414 scaled_max = im->maxval / im->magfact;
416 for (i=1; sensiblevalues[i] > 0; i++){
417 if (sensiblevalues[i-1]>=scaled_min &&
418 sensiblevalues[i]<=scaled_min)
419 im->minval = sensiblevalues[i]*(im->magfact);
421 if (-sensiblevalues[i-1]<=scaled_min &&
422 -sensiblevalues[i]>=scaled_min)
423 im->minval = -sensiblevalues[i-1]*(im->magfact);
425 if (sensiblevalues[i-1] >= scaled_max &&
426 sensiblevalues[i] <= scaled_max)
427 im->maxval = sensiblevalues[i-1]*(im->magfact);
429 if (-sensiblevalues[i-1]<=scaled_max &&
430 -sensiblevalues[i] >=scaled_max)
431 im->maxval = -sensiblevalues[i]*(im->magfact);
432 }
433 /* no sensiblevalues found. we switch to ALTYGRID mode */
434 if (sensiblevalues[i] == 0){
435 im->extra_flags |= ALTYGRID;
436 }
437 }
438 } else {
439 /* adjust min and max to the grid definition if there is one */
440 im->minval = (double)im->ylabfact * im->ygridstep *
441 floor(im->minval / ((double)im->ylabfact * im->ygridstep));
442 im->maxval = (double)im->ylabfact * im->ygridstep *
443 ceil(im->maxval /( (double)im->ylabfact * im->ygridstep));
444 }
446 #ifdef DEBUG
447 fprintf(stderr,"SCALED Min: %6.2f Max: %6.2f Factor: %6.2f\n",
448 im->minval,im->maxval,im->magfact);
449 #endif
450 }
452 void
453 apply_gridfit(image_desc_t *im)
454 {
455 if (isnan(im->minval) || isnan(im->maxval))
456 return;
457 ytr(im,DNAN);
458 if (im->logarithmic) {
459 double ya, yb, ypix, ypixfrac;
460 double log10_range = log10(im->maxval) - log10(im->minval);
461 ya = pow((double)10, floor(log10(im->minval)));
462 while (ya < im->minval)
463 ya *= 10;
464 if (ya > im->maxval)
465 return; /* don't have y=10^x gridline */
466 yb = ya * 10;
467 if (yb <= im->maxval) {
468 /* we have at least 2 y=10^x gridlines.
469 Make sure distance between them in pixels
470 are an integer by expanding im->maxval */
471 double y_pixel_delta = ytr(im, ya) - ytr(im, yb);
472 double factor = y_pixel_delta / floor(y_pixel_delta);
473 double new_log10_range = factor * log10_range;
474 double new_ymax_log10 = log10(im->minval) + new_log10_range;
475 im->maxval = pow(10, new_ymax_log10);
476 ytr(im, DNAN); /* reset precalc */
477 log10_range = log10(im->maxval) - log10(im->minval);
478 }
479 /* make sure first y=10^x gridline is located on
480 integer pixel position by moving scale slightly
481 downwards (sub-pixel movement) */
482 ypix = ytr(im, ya) + im->ysize; /* add im->ysize so it always is positive */
483 ypixfrac = ypix - floor(ypix);
484 if (ypixfrac > 0 && ypixfrac < 1) {
485 double yfrac = ypixfrac / im->ysize;
486 im->minval = pow(10, log10(im->minval) - yfrac * log10_range);
487 im->maxval = pow(10, log10(im->maxval) - yfrac * log10_range);
488 ytr(im, DNAN); /* reset precalc */
489 }
490 } else {
491 /* Make sure we have an integer pixel distance between
492 each minor gridline */
493 double ypos1 = ytr(im, im->minval);
494 double ypos2 = ytr(im, im->minval + im->ygrid_scale.gridstep);
495 double y_pixel_delta = ypos1 - ypos2;
496 double factor = y_pixel_delta / floor(y_pixel_delta);
497 double new_range = factor * (im->maxval - im->minval);
498 double gridstep = im->ygrid_scale.gridstep;
499 double minor_y, minor_y_px, minor_y_px_frac;
500 im->maxval = im->minval + new_range;
501 ytr(im, DNAN); /* reset precalc */
502 /* make sure first minor gridline is on integer pixel y coord */
503 minor_y = gridstep * floor(im->minval / gridstep);
504 while (minor_y < im->minval)
505 minor_y += gridstep;
506 minor_y_px = ytr(im, minor_y) + im->ysize; /* ensure > 0 by adding ysize */
507 minor_y_px_frac = minor_y_px - floor(minor_y_px);
508 if (minor_y_px_frac > 0 && minor_y_px_frac < 1) {
509 double yfrac = minor_y_px_frac / im->ysize;
510 double range = im->maxval - im->minval;
511 im->minval = im->minval - yfrac * range;
512 im->maxval = im->maxval - yfrac * range;
513 ytr(im, DNAN); /* reset precalc */
514 }
515 calc_horizontal_grid(im); /* recalc with changed im->maxval */
516 }
517 }
519 /* reduce data reimplementation by Alex */
521 void
522 reduce_data(
523 enum cf_en cf, /* which consolidation function ?*/
524 unsigned long cur_step, /* step the data currently is in */
525 time_t *start, /* start, end and step as requested ... */
526 time_t *end, /* ... by the application will be ... */
527 unsigned long *step, /* ... adjusted to represent reality */
528 unsigned long *ds_cnt, /* number of data sources in file */
529 rrd_value_t **data) /* two dimensional array containing the data */
530 {
531 int i,reduce_factor = ceil((double)(*step) / (double)cur_step);
532 unsigned long col,dst_row,row_cnt,start_offset,end_offset,skiprows=0;
533 rrd_value_t *srcptr,*dstptr;
535 (*step) = cur_step*reduce_factor; /* set new step size for reduced data */
536 dstptr = *data;
537 srcptr = *data;
538 row_cnt = ((*end)-(*start))/cur_step;
540 #ifdef DEBUG
541 #define DEBUG_REDUCE
542 #endif
543 #ifdef DEBUG_REDUCE
544 printf("Reducing %lu rows with factor %i time %lu to %lu, step %lu\n",
545 row_cnt,reduce_factor,*start,*end,cur_step);
546 for (col=0;col<row_cnt;col++) {
547 printf("time %10lu: ",*start+(col+1)*cur_step);
548 for (i=0;i<*ds_cnt;i++)
549 printf(" %8.2e",srcptr[*ds_cnt*col+i]);
550 printf("\n");
551 }
552 #endif
554 /* We have to combine [reduce_factor] rows of the source
555 ** into one row for the destination. Doing this we also
556 ** need to take care to combine the correct rows. First
557 ** alter the start and end time so that they are multiples
558 ** of the new step time. We cannot reduce the amount of
559 ** time so we have to move the end towards the future and
560 ** the start towards the past.
561 */
562 end_offset = (*end) % (*step);
563 start_offset = (*start) % (*step);
565 /* If there is a start offset (which cannot be more than
566 ** one destination row), skip the appropriate number of
567 ** source rows and one destination row. The appropriate
568 ** number is what we do know (start_offset/cur_step) of
569 ** the new interval (*step/cur_step aka reduce_factor).
570 */
571 #ifdef DEBUG_REDUCE
572 printf("start_offset: %lu end_offset: %lu\n",start_offset,end_offset);
573 printf("row_cnt before: %lu\n",row_cnt);
574 #endif
575 if (start_offset) {
576 (*start) = (*start)-start_offset;
577 skiprows=reduce_factor-start_offset/cur_step;
578 srcptr+=skiprows* *ds_cnt;
579 for (col=0;col<(*ds_cnt);col++) *dstptr++ = DNAN;
580 row_cnt-=skiprows;
581 }
582 #ifdef DEBUG_REDUCE
583 printf("row_cnt between: %lu\n",row_cnt);
584 #endif
586 /* At the end we have some rows that are not going to be
587 ** used, the amount is end_offset/cur_step
588 */
589 if (end_offset) {
590 (*end) = (*end)-end_offset+(*step);
591 skiprows = end_offset/cur_step;
592 row_cnt-=skiprows;
593 }
594 #ifdef DEBUG_REDUCE
595 printf("row_cnt after: %lu\n",row_cnt);
596 #endif
598 /* Sanity check: row_cnt should be multiple of reduce_factor */
599 /* if this gets triggered, something is REALLY WRONG ... we die immediately */
601 if (row_cnt%reduce_factor) {
602 printf("SANITY CHECK: %lu rows cannot be reduced by %i \n",
603 row_cnt,reduce_factor);
604 printf("BUG in reduce_data()\n");
605 exit(1);
606 }
608 /* Now combine reduce_factor intervals at a time
609 ** into one interval for the destination.
610 */
612 for (dst_row=0;(long int)row_cnt>=reduce_factor;dst_row++) {
613 for (col=0;col<(*ds_cnt);col++) {
614 rrd_value_t newval=DNAN;
615 unsigned long validval=0;
617 for (i=0;i<reduce_factor;i++) {
618 if (isnan(srcptr[i*(*ds_cnt)+col])) {
619 continue;
620 }
621 validval++;
622 if (isnan(newval)) newval = srcptr[i*(*ds_cnt)+col];
623 else {
624 switch (cf) {
625 case CF_HWPREDICT:
626 case CF_DEVSEASONAL:
627 case CF_DEVPREDICT:
628 case CF_SEASONAL:
629 case CF_AVERAGE:
630 newval += srcptr[i*(*ds_cnt)+col];
631 break;
632 case CF_MINIMUM:
633 newval = min (newval,srcptr[i*(*ds_cnt)+col]);
634 break;
635 case CF_FAILURES:
636 /* an interval contains a failure if any subintervals contained a failure */
637 case CF_MAXIMUM:
638 newval = max (newval,srcptr[i*(*ds_cnt)+col]);
639 break;
640 case CF_LAST:
641 newval = srcptr[i*(*ds_cnt)+col];
642 break;
643 }
644 }
645 }
646 if (validval == 0){newval = DNAN;} else{
647 switch (cf) {
648 case CF_HWPREDICT:
649 case CF_DEVSEASONAL:
650 case CF_DEVPREDICT:
651 case CF_SEASONAL:
652 case CF_AVERAGE:
653 newval /= validval;
654 break;
655 case CF_MINIMUM:
656 case CF_FAILURES:
657 case CF_MAXIMUM:
658 case CF_LAST:
659 break;
660 }
661 }
662 *dstptr++=newval;
663 }
664 srcptr+=(*ds_cnt)*reduce_factor;
665 row_cnt-=reduce_factor;
666 }
667 /* If we had to alter the endtime, we didn't have enough
668 ** source rows to fill the last row. Fill it with NaN.
669 */
670 if (end_offset) for (col=0;col<(*ds_cnt);col++) *dstptr++ = DNAN;
671 #ifdef DEBUG_REDUCE
672 row_cnt = ((*end)-(*start))/ *step;
673 srcptr = *data;
674 printf("Done reducing. Currently %lu rows, time %lu to %lu, step %lu\n",
675 row_cnt,*start,*end,*step);
676 for (col=0;col<row_cnt;col++) {
677 printf("time %10lu: ",*start+(col+1)*(*step));
678 for (i=0;i<*ds_cnt;i++)
679 printf(" %8.2e",srcptr[*ds_cnt*col+i]);
680 printf("\n");
681 }
682 #endif
683 }
686 /* get the data required for the graphs from the
687 relevant rrds ... */
689 int
690 data_fetch(image_desc_t *im )
691 {
692 int i,ii;
693 int skip;
695 /* pull the data from the log files ... */
696 for (i=0;i< (int)im->gdes_c;i++){
697 /* only GF_DEF elements fetch data */
698 if (im->gdes[i].gf != GF_DEF)
699 continue;
701 skip=0;
702 /* do we have it already ?*/
703 for (ii=0;ii<i;ii++) {
704 if (im->gdes[ii].gf != GF_DEF)
705 continue;
706 if ((strcmp(im->gdes[i].rrd, im->gdes[ii].rrd) == 0)
707 && (im->gdes[i].cf == im->gdes[ii].cf)
708 && (im->gdes[i].cf_reduce == im->gdes[ii].cf_reduce)
709 && (im->gdes[i].start == im->gdes[ii].start)
710 && (im->gdes[i].end == im->gdes[ii].end)
711 && (im->gdes[i].step == im->gdes[ii].step)) {
712 /* OK, the data is already there.
713 ** Just copy the header portion
714 */
715 im->gdes[i].start = im->gdes[ii].start;
716 im->gdes[i].end = im->gdes[ii].end;
717 im->gdes[i].step = im->gdes[ii].step;
718 im->gdes[i].ds_cnt = im->gdes[ii].ds_cnt;
719 im->gdes[i].ds_namv = im->gdes[ii].ds_namv;
720 im->gdes[i].data = im->gdes[ii].data;
721 im->gdes[i].data_first = 0;
722 skip=1;
723 }
724 if (skip)
725 break;
726 }
727 if (! skip) {
728 unsigned long ft_step = im->gdes[i].step ;
730 if((rrd_fetch_fn(im->gdes[i].rrd,
731 im->gdes[i].cf,
732 &im->gdes[i].start,
733 &im->gdes[i].end,
734 &ft_step,
735 &im->gdes[i].ds_cnt,
736 &im->gdes[i].ds_namv,
737 &im->gdes[i].data)) == -1){
738 return -1;
739 }
740 im->gdes[i].data_first = 1;
741 im->gdes[i].step = im->step;
743 if (ft_step < im->gdes[i].step) {
744 reduce_data(im->gdes[i].cf_reduce,
745 ft_step,
746 &im->gdes[i].start,
747 &im->gdes[i].end,
748 &im->gdes[i].step,
749 &im->gdes[i].ds_cnt,
750 &im->gdes[i].data);
751 } else {
752 im->gdes[i].step = ft_step;
753 }
754 }
756 /* lets see if the required data source is really there */
757 for(ii=0;ii<(int)im->gdes[i].ds_cnt;ii++){
758 if(strcmp(im->gdes[i].ds_namv[ii],im->gdes[i].ds_nam) == 0){
759 im->gdes[i].ds=ii; }
760 }
761 if (im->gdes[i].ds== -1){
762 rrd_set_error("No DS called '%s' in '%s'",
763 im->gdes[i].ds_nam,im->gdes[i].rrd);
764 return -1;
765 }
767 }
768 return 0;
769 }
771 /* evaluate the expressions in the CDEF functions */
773 /*************************************************************
774 * CDEF stuff
775 *************************************************************/
777 long
778 find_var_wrapper(void *arg1, char *key)
779 {
780 return find_var((image_desc_t *) arg1, key);
781 }
783 /* find gdes containing var*/
784 long
785 find_var(image_desc_t *im, char *key){
786 long ii;
787 for(ii=0;ii<im->gdes_c-1;ii++){
788 if((im->gdes[ii].gf == GF_DEF
789 || im->gdes[ii].gf == GF_VDEF
790 || im->gdes[ii].gf == GF_CDEF)
791 && (strcmp(im->gdes[ii].vname,key) == 0)){
792 return ii;
793 }
794 }
795 return -1;
796 }
798 /* find the largest common denominator for all the numbers
799 in the 0 terminated num array */
800 long
801 lcd(long *num){
802 long rest;
803 int i;
804 for (i=0;num[i+1]!=0;i++){
805 do {
806 rest=num[i] % num[i+1];
807 num[i]=num[i+1]; num[i+1]=rest;
808 } while (rest!=0);
809 num[i+1] = num[i];
810 }
811 /* return i==0?num[i]:num[i-1]; */
812 return num[i];
813 }
815 /* run the rpn calculator on all the VDEF and CDEF arguments */
816 int
817 data_calc( image_desc_t *im){
819 int gdi;
820 int dataidx;
821 long *steparray, rpi;
822 int stepcnt;
823 time_t now;
824 rpnstack_t rpnstack;
826 rpnstack_init(&rpnstack);
828 for (gdi=0;gdi<im->gdes_c;gdi++){
829 /* Look for GF_VDEF and GF_CDEF in the same loop,
830 * so CDEFs can use VDEFs and vice versa
831 */
832 switch (im->gdes[gdi].gf) {
833 case GF_XPORT:
834 break;
835 case GF_SHIFT: {
836 graph_desc_t *vdp = &im->gdes[im->gdes[gdi].vidx];
838 /* remove current shift */
839 vdp->start -= vdp->shift;
840 vdp->end -= vdp->shift;
842 /* vdef */
843 if (im->gdes[gdi].shidx >= 0)
844 vdp->shift = im->gdes[im->gdes[gdi].shidx].vf.val;
845 /* constant */
846 else
847 vdp->shift = im->gdes[gdi].shval;
849 /* normalize shift to multiple of consolidated step */
850 vdp->shift = (vdp->shift / (long)vdp->step) * (long)vdp->step;
852 /* apply shift */
853 vdp->start += vdp->shift;
854 vdp->end += vdp->shift;
855 break;
856 }
857 case GF_VDEF:
858 /* A VDEF has no DS. This also signals other parts
859 * of rrdtool that this is a VDEF value, not a CDEF.
860 */
861 im->gdes[gdi].ds_cnt = 0;
862 if (vdef_calc(im,gdi)) {
863 rrd_set_error("Error processing VDEF '%s'"
864 ,im->gdes[gdi].vname
865 );
866 rpnstack_free(&rpnstack);
867 return -1;
868 }
869 break;
870 case GF_CDEF:
871 im->gdes[gdi].ds_cnt = 1;
872 im->gdes[gdi].ds = 0;
873 im->gdes[gdi].data_first = 1;
874 im->gdes[gdi].start = 0;
875 im->gdes[gdi].end = 0;
876 steparray=NULL;
877 stepcnt = 0;
878 dataidx=-1;
880 /* Find the variables in the expression.
881 * - VDEF variables are substituted by their values
882 * and the opcode is changed into OP_NUMBER.
883 * - CDEF variables are analized for their step size,
884 * the lowest common denominator of all the step
885 * sizes of the data sources involved is calculated
886 * and the resulting number is the step size for the
887 * resulting data source.
888 */
889 for(rpi=0;im->gdes[gdi].rpnp[rpi].op != OP_END;rpi++){
890 if(im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
891 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER){
892 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
893 if (im->gdes[ptr].ds_cnt == 0) { /* this is a VDEF data source */
894 #if 0
895 printf("DEBUG: inside CDEF '%s' processing VDEF '%s'\n",
896 im->gdes[gdi].vname,
897 im->gdes[ptr].vname);
898 printf("DEBUG: value from vdef is %f\n",im->gdes[ptr].vf.val);
899 #endif
900 im->gdes[gdi].rpnp[rpi].val = im->gdes[ptr].vf.val;
901 im->gdes[gdi].rpnp[rpi].op = OP_NUMBER;
902 } else { /* normal variables and PREF(variables) */
904 /* add one entry to the array that keeps track of the step sizes of the
905 * data sources going into the CDEF. */
906 if ((steparray =
907 rrd_realloc(steparray,
908 (++stepcnt+1)*sizeof(*steparray)))==NULL){
909 rrd_set_error("realloc steparray");
910 rpnstack_free(&rpnstack);
911 return -1;
912 };
914 steparray[stepcnt-1] = im->gdes[ptr].step;
916 /* adjust start and end of cdef (gdi) so
917 * that it runs from the latest start point
918 * to the earliest endpoint of any of the
919 * rras involved (ptr)
920 */
922 if(im->gdes[gdi].start < im->gdes[ptr].start)
923 im->gdes[gdi].start = im->gdes[ptr].start;
925 if(im->gdes[gdi].end == 0 ||
926 im->gdes[gdi].end > im->gdes[ptr].end)
927 im->gdes[gdi].end = im->gdes[ptr].end;
929 /* store pointer to the first element of
930 * the rra providing data for variable,
931 * further save step size and data source
932 * count of this rra
933 */
934 im->gdes[gdi].rpnp[rpi].data = im->gdes[ptr].data + im->gdes[ptr].ds;
935 im->gdes[gdi].rpnp[rpi].step = im->gdes[ptr].step;
936 im->gdes[gdi].rpnp[rpi].ds_cnt = im->gdes[ptr].ds_cnt;
938 /* backoff the *.data ptr; this is done so
939 * rpncalc() function doesn't have to treat
940 * the first case differently
941 */
942 } /* if ds_cnt != 0 */
943 } /* if OP_VARIABLE */
944 } /* loop through all rpi */
946 /* move the data pointers to the correct period */
947 for(rpi=0;im->gdes[gdi].rpnp[rpi].op != OP_END;rpi++){
948 if(im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
949 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER){
950 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
951 long diff = im->gdes[gdi].start - im->gdes[ptr].start;
953 if(diff > 0)
954 im->gdes[gdi].rpnp[rpi].data += (diff / im->gdes[ptr].step) * im->gdes[ptr].ds_cnt;
955 }
956 }
958 if(steparray == NULL){
959 rrd_set_error("rpn expressions without DEF"
960 " or CDEF variables are not supported");
961 rpnstack_free(&rpnstack);
962 return -1;
963 }
964 steparray[stepcnt]=0;
965 /* Now find the resulting step. All steps in all
966 * used RRAs have to be visited
967 */
968 im->gdes[gdi].step = lcd(steparray);
969 free(steparray);
970 if((im->gdes[gdi].data = malloc((
971 (im->gdes[gdi].end-im->gdes[gdi].start)
972 / im->gdes[gdi].step)
973 * sizeof(double)))==NULL){
974 rrd_set_error("malloc im->gdes[gdi].data");
975 rpnstack_free(&rpnstack);
976 return -1;
977 }
979 /* Step through the new cdef results array and
980 * calculate the values
981 */
982 for (now = im->gdes[gdi].start + im->gdes[gdi].step;
983 now<=im->gdes[gdi].end;
984 now += im->gdes[gdi].step)
985 {
986 rpnp_t *rpnp = im -> gdes[gdi].rpnp;
988 /* 3rd arg of rpn_calc is for OP_VARIABLE lookups;
989 * in this case we are advancing by timesteps;
990 * we use the fact that time_t is a synonym for long
991 */
992 if (rpn_calc(rpnp,&rpnstack,(long) now,
993 im->gdes[gdi].data,++dataidx) == -1) {
994 /* rpn_calc sets the error string */
995 rpnstack_free(&rpnstack);
996 return -1;
997 }
998 } /* enumerate over time steps within a CDEF */
999 break;
1000 default:
1001 continue;
1002 }
1003 } /* enumerate over CDEFs */
1004 rpnstack_free(&rpnstack);
1005 return 0;
1006 }
1008 /* massage data so, that we get one value for each x coordinate in the graph */
1009 int
1010 data_proc( image_desc_t *im ){
1011 long i,ii;
1012 double pixstep = (double)(im->end-im->start)
1013 /(double)im->xsize; /* how much time
1014 passes in one pixel */
1015 double paintval;
1016 double minval=DNAN,maxval=DNAN;
1018 unsigned long gr_time;
1020 /* memory for the processed data */
1021 for(i=0;i<im->gdes_c;i++) {
1022 if((im->gdes[i].gf==GF_LINE) ||
1023 (im->gdes[i].gf==GF_AREA) ||
1024 (im->gdes[i].gf==GF_TICK) ||
1025 (im->gdes[i].gf==GF_STACK)) {
1026 if((im->gdes[i].p_data = malloc((im->xsize +1)
1027 * sizeof(rrd_value_t)))==NULL){
1028 rrd_set_error("malloc data_proc");
1029 return -1;
1030 }
1031 }
1032 }
1034 for (i=0;i<im->xsize;i++) { /* for each pixel */
1035 long vidx;
1036 gr_time = im->start+pixstep*i; /* time of the current step */
1037 paintval=0.0;
1039 for (ii=0;ii<im->gdes_c;ii++) {
1040 double value;
1041 switch (im->gdes[ii].gf) {
1042 case GF_LINE:
1043 case GF_AREA:
1044 case GF_TICK:
1045 if (!im->gdes[ii].stack)
1046 paintval = 0.0;
1047 case GF_STACK:
1048 value = im->gdes[ii].yrule;
1049 if (isnan(value) || (im->gdes[ii].gf == GF_TICK)) {
1050 /* The time of the data doesn't necessarily match
1051 ** the time of the graph. Beware.
1052 */
1053 vidx = im->gdes[ii].vidx;
1054 if (im->gdes[vidx].gf == GF_VDEF) {
1055 value = im->gdes[vidx].vf.val;
1056 } else if (((long int)gr_time >= (long int)im->gdes[vidx].start) &&
1057 ((long int)gr_time <= (long int)im->gdes[vidx].end) ) {
1058 value = im->gdes[vidx].data[
1059 (unsigned long) floor(
1060 (double)(gr_time - im->gdes[vidx].start)
1061 / im->gdes[vidx].step)
1062 * im->gdes[vidx].ds_cnt
1063 + im->gdes[vidx].ds
1064 ];
1065 } else {
1066 value = DNAN;
1067 }
1068 };
1070 if (! isnan(value)) {
1071 paintval += value;
1072 im->gdes[ii].p_data[i] = paintval;
1073 /* GF_TICK: the data values are not
1074 ** relevant for min and max
1075 */
1076 if (finite(paintval) && im->gdes[ii].gf != GF_TICK ) {
1077 if (isnan(minval) || paintval < minval)
1078 minval = paintval;
1079 if (isnan(maxval) || paintval > maxval)
1080 maxval = paintval;
1081 }
1082 } else {
1083 im->gdes[ii].p_data[i] = DNAN;
1084 }
1085 break;
1086 default:
1087 break;
1088 }
1089 }
1090 }
1092 /* if min or max have not been asigned a value this is because
1093 there was no data in the graph ... this is not good ...
1094 lets set these to dummy values then ... */
1096 if (isnan(minval)) minval = 0.0;
1097 if (isnan(maxval)) maxval = 1.0;
1099 /* adjust min and max values */
1100 if (isnan(im->minval)
1101 /* don't adjust low-end with log scale */
1102 || ((!im->logarithmic && !im->rigid) && im->minval > minval)
1103 )
1104 im->minval = minval;
1105 if (isnan(im->maxval)
1106 || (!im->rigid && im->maxval < maxval)
1107 ) {
1108 if (im->logarithmic)
1109 im->maxval = maxval * 1.1;
1110 else
1111 im->maxval = maxval;
1112 }
1113 /* make sure min is smaller than max */
1114 if (im->minval > im->maxval) {
1115 im->minval = 0.99 * im->maxval;
1116 }
1118 /* make sure min and max are not equal */
1119 if (im->minval == im->maxval) {
1120 im->maxval *= 1.01;
1121 if (! im->logarithmic) {
1122 im->minval *= 0.99;
1123 }
1124 /* make sure min and max are not both zero */
1125 if (im->maxval == 0.0) {
1126 im->maxval = 1.0;
1127 }
1128 }
1129 return 0;
1130 }
1134 /* identify the point where the first gridline, label ... gets placed */
1136 time_t
1137 find_first_time(
1138 time_t start, /* what is the initial time */
1139 enum tmt_en baseint, /* what is the basic interval */
1140 long basestep /* how many if these do we jump a time */
1141 )
1142 {
1143 struct tm tm;
1144 localtime_r(&start, &tm);
1145 switch(baseint){
1146 case TMT_SECOND:
1147 tm.tm_sec -= tm.tm_sec % basestep; break;
1148 case TMT_MINUTE:
1149 tm.tm_sec=0;
1150 tm.tm_min -= tm.tm_min % basestep;
1151 break;
1152 case TMT_HOUR:
1153 tm.tm_sec=0;
1154 tm.tm_min = 0;
1155 tm.tm_hour -= tm.tm_hour % basestep; break;
1156 case TMT_DAY:
1157 /* we do NOT look at the basestep for this ... */
1158 tm.tm_sec=0;
1159 tm.tm_min = 0;
1160 tm.tm_hour = 0; break;
1161 case TMT_WEEK:
1162 /* we do NOT look at the basestep for this ... */
1163 tm.tm_sec=0;
1164 tm.tm_min = 0;
1165 tm.tm_hour = 0;
1166 tm.tm_mday -= tm.tm_wday -1; /* -1 because we want the monday */
1167 if (tm.tm_wday==0) tm.tm_mday -= 7; /* we want the *previous* monday */
1168 break;
1169 case TMT_MONTH:
1170 tm.tm_sec=0;
1171 tm.tm_min = 0;
1172 tm.tm_hour = 0;
1173 tm.tm_mday = 1;
1174 tm.tm_mon -= tm.tm_mon % basestep; break;
1176 case TMT_YEAR:
1177 tm.tm_sec=0;
1178 tm.tm_min = 0;
1179 tm.tm_hour = 0;
1180 tm.tm_mday = 1;
1181 tm.tm_mon = 0;
1182 tm.tm_year -= (tm.tm_year+1900) % basestep;
1184 }
1185 return mktime(&tm);
1186 }
1187 /* identify the point where the next gridline, label ... gets placed */
1188 time_t
1189 find_next_time(
1190 time_t current, /* what is the initial time */
1191 enum tmt_en baseint, /* what is the basic interval */
1192 long basestep /* how many if these do we jump a time */
1193 )
1194 {
1195 struct tm tm;
1196 time_t madetime;
1197 localtime_r(¤t, &tm);
1198 do {
1199 switch(baseint){
1200 case TMT_SECOND:
1201 tm.tm_sec += basestep; break;
1202 case TMT_MINUTE:
1203 tm.tm_min += basestep; break;
1204 case TMT_HOUR:
1205 tm.tm_hour += basestep; break;
1206 case TMT_DAY:
1207 tm.tm_mday += basestep; break;
1208 case TMT_WEEK:
1209 tm.tm_mday += 7*basestep; break;
1210 case TMT_MONTH:
1211 tm.tm_mon += basestep; break;
1212 case TMT_YEAR:
1213 tm.tm_year += basestep;
1214 }
1215 madetime = mktime(&tm);
1216 } while (madetime == -1); /* this is necessary to skip impssible times
1217 like the daylight saving time skips */
1218 return madetime;
1220 }
1223 /* calculate values required for PRINT and GPRINT functions */
1225 int
1226 print_calc(image_desc_t *im, char ***prdata)
1227 {
1228 long i,ii,validsteps;
1229 double printval;
1230 time_t printtime;
1231 int graphelement = 0;
1232 long vidx;
1233 int max_ii;
1234 double magfact = -1;
1235 char *si_symb = "";
1236 char *percent_s;
1237 int prlines = 1;
1238 if (im->imginfo) prlines++;
1239 for(i=0;i<im->gdes_c;i++){
1240 switch(im->gdes[i].gf){
1241 case GF_PRINT:
1242 prlines++;
1243 if(((*prdata) = rrd_realloc((*prdata),prlines*sizeof(char *)))==NULL){
1244 rrd_set_error("realloc prdata");
1245 return 0;
1246 }
1247 case GF_GPRINT:
1248 /* PRINT and GPRINT can now print VDEF generated values.
1249 * There's no need to do any calculations on them as these
1250 * calculations were already made.
1251 */
1252 vidx = im->gdes[i].vidx;
1253 if (im->gdes[vidx].gf==GF_VDEF) { /* simply use vals */
1254 printval = im->gdes[vidx].vf.val;
1255 printtime = im->gdes[vidx].vf.when;
1256 } else { /* need to calculate max,min,avg etcetera */
1257 max_ii =((im->gdes[vidx].end
1258 - im->gdes[vidx].start)
1259 / im->gdes[vidx].step
1260 * im->gdes[vidx].ds_cnt);
1261 printval = DNAN;
1262 validsteps = 0;
1263 for( ii=im->gdes[vidx].ds;
1264 ii < max_ii;
1265 ii+=im->gdes[vidx].ds_cnt){
1266 if (! finite(im->gdes[vidx].data[ii]))
1267 continue;
1268 if (isnan(printval)){
1269 printval = im->gdes[vidx].data[ii];
1270 validsteps++;
1271 continue;
1272 }
1274 switch (im->gdes[i].cf){
1275 case CF_HWPREDICT:
1276 case CF_DEVPREDICT:
1277 case CF_DEVSEASONAL:
1278 case CF_SEASONAL:
1279 case CF_AVERAGE:
1280 validsteps++;
1281 printval += im->gdes[vidx].data[ii];
1282 break;
1283 case CF_MINIMUM:
1284 printval = min( printval, im->gdes[vidx].data[ii]);
1285 break;
1286 case CF_FAILURES:
1287 case CF_MAXIMUM:
1288 printval = max( printval, im->gdes[vidx].data[ii]);
1289 break;
1290 case CF_LAST:
1291 printval = im->gdes[vidx].data[ii];
1292 }
1293 }
1294 if (im->gdes[i].cf==CF_AVERAGE || im->gdes[i].cf > CF_LAST) {
1295 if (validsteps > 1) {
1296 printval = (printval / validsteps);
1297 }
1298 }
1299 } /* prepare printval */
1301 if (!strcmp(im->gdes[i].format,"%c")) { /* VDEF time print */
1302 char ctime_buf[128]; /* PS: for ctime_r, must be >= 26 chars */
1303 int iii=0;
1304 ctime_r(&printtime,ctime_buf);
1305 while(isprint(ctime_buf[iii])){iii++;}
1306 ctime_buf[iii]='\0';
1307 if (im->gdes[i].gf == GF_PRINT){
1308 (*prdata)[prlines-2] = malloc((FMT_LEG_LEN+2)*sizeof(char));
1309 sprintf((*prdata)[prlines-2],"%s (%lu)",ctime_buf,printtime);
1310 (*prdata)[prlines-1] = NULL;
1311 } else {
1312 sprintf(im->gdes[i].legend,"%s (%lu)",ctime_buf,printtime);
1313 graphelement = 1;
1314 }
1315 } else {
1316 if ((percent_s = strstr(im->gdes[i].format,"%S")) != NULL) {
1317 /* Magfact is set to -1 upon entry to print_calc. If it
1318 * is still less than 0, then we need to run auto_scale.
1319 * Otherwise, put the value into the correct units. If
1320 * the value is 0, then do not set the symbol or magnification
1321 * so next the calculation will be performed again. */
1322 if (magfact < 0.0) {
1323 auto_scale(im,&printval,&si_symb,&magfact);
1324 if (printval == 0.0)
1325 magfact = -1.0;
1326 } else {
1327 printval /= magfact;
1328 }
1329 *(++percent_s) = 's';
1330 } else if (strstr(im->gdes[i].format,"%s") != NULL) {
1331 auto_scale(im,&printval,&si_symb,&magfact);
1332 }
1334 if (im->gdes[i].gf == GF_PRINT){
1335 (*prdata)[prlines-2] = malloc((FMT_LEG_LEN+2)*sizeof(char));
1336 (*prdata)[prlines-1] = NULL;
1337 if (bad_format(im->gdes[i].format)) {
1338 rrd_set_error("bad format for PRINT in '%s'", im->gdes[i].format);
1339 return -1;
1340 }
1341 #ifdef HAVE_SNPRINTF
1342 snprintf((*prdata)[prlines-2],FMT_LEG_LEN,im->gdes[i].format,printval,si_symb);
1343 #else
1344 sprintf((*prdata)[prlines-2],im->gdes[i].format,printval,si_symb);
1345 #endif
1346 } else {
1347 /* GF_GPRINT */
1349 if (bad_format(im->gdes[i].format)) {
1350 rrd_set_error("bad format for GPRINT in '%s'", im->gdes[i].format);
1351 return -1;
1352 }
1353 #ifdef HAVE_SNPRINTF
1354 snprintf(im->gdes[i].legend,FMT_LEG_LEN-2,im->gdes[i].format,printval,si_symb);
1355 #else
1356 sprintf(im->gdes[i].legend,im->gdes[i].format,printval,si_symb);
1357 #endif
1358 graphelement = 1;
1359 }
1360 }
1361 break;
1362 case GF_LINE:
1363 case GF_AREA:
1364 case GF_TICK:
1365 case GF_STACK:
1366 case GF_HRULE:
1367 case GF_VRULE:
1368 graphelement = 1;
1369 break;
1370 case GF_COMMENT:
1371 case GF_DEF:
1372 case GF_CDEF:
1373 case GF_VDEF:
1374 #ifdef WITH_PIECHART
1375 case GF_PART:
1376 #endif
1377 case GF_SHIFT:
1378 case GF_XPORT:
1379 break;
1380 }
1381 }
1382 return graphelement;
1383 }
1386 /* place legends with color spots */
1387 int
1388 leg_place(image_desc_t *im)
1389 {
1390 /* graph labels */
1391 int interleg = im->text_prop[TEXT_PROP_LEGEND].size*2.0;
1392 int border = im->text_prop[TEXT_PROP_LEGEND].size*2.0;
1393 int fill=0, fill_last;
1394 int leg_c = 0;
1395 int leg_x = border, leg_y = im->yimg;
1396 int leg_cc;
1397 int glue = 0;
1398 int i,ii, mark = 0;
1399 char prt_fctn; /*special printfunctions */
1400 int *legspace;
1402 if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
1403 if ((legspace = malloc(im->gdes_c*sizeof(int)))==NULL){
1404 rrd_set_error("malloc for legspace");
1405 return -1;
1406 }
1408 for(i=0;i<im->gdes_c;i++){
1409 fill_last = fill;
1411 /* hid legends for rules which are not displayed */
1413 if(!(im->extra_flags & FORCE_RULES_LEGEND)) {
1414 if (im->gdes[i].gf == GF_HRULE &&
1415 (im->gdes[i].yrule < im->minval || im->gdes[i].yrule > im->maxval))
1416 im->gdes[i].legend[0] = '\0';
1418 if (im->gdes[i].gf == GF_VRULE &&
1419 (im->gdes[i].xrule < im->start || im->gdes[i].xrule > im->end))
1420 im->gdes[i].legend[0] = '\0';
1421 }
1423 leg_cc = strlen(im->gdes[i].legend);
1425 /* is there a controle code ant the end of the legend string ? */
1426 /* and it is not a tab \\t */
1427 if (leg_cc >= 2 && im->gdes[i].legend[leg_cc-2] == '\\' && im->gdes[i].legend[leg_cc-1] != 't') {
1428 prt_fctn = im->gdes[i].legend[leg_cc-1];
1429 leg_cc -= 2;
1430 im->gdes[i].legend[leg_cc] = '\0';
1431 } else {
1432 prt_fctn = '\0';
1433 }
1434 /* remove exess space */
1435 while (prt_fctn=='g' &&
1436 leg_cc > 0 &&
1437 im->gdes[i].legend[leg_cc-1]==' '){
1438 leg_cc--;
1439 im->gdes[i].legend[leg_cc]='\0';
1440 }
1441 if (leg_cc != 0 ){
1442 legspace[i]=(prt_fctn=='g' ? 0 : interleg);
1444 if (fill > 0){
1445 /* no interleg space if string ends in \g */
1446 fill += legspace[i];
1447 }
1448 fill += gfx_get_text_width(im->canvas, fill+border,
1449 im->text_prop[TEXT_PROP_LEGEND].font,
1450 im->text_prop[TEXT_PROP_LEGEND].size,
1451 im->tabwidth,
1452 im->gdes[i].legend, 0);
1453 leg_c++;
1454 } else {
1455 legspace[i]=0;
1456 }
1457 /* who said there was a special tag ... ?*/
1458 if (prt_fctn=='g') {
1459 prt_fctn = '\0';
1460 }
1461 if (prt_fctn == '\0') {
1462 if (i == im->gdes_c -1 ) prt_fctn ='l';
1464 /* is it time to place the legends ? */
1465 if (fill > im->ximg - 2*border){
1466 if (leg_c > 1) {
1467 /* go back one */
1468 i--;
1469 fill = fill_last;
1470 leg_c--;
1471 prt_fctn = 'j';
1472 } else {
1473 prt_fctn = 'l';
1474 }
1476 }
1477 }
1480 if (prt_fctn != '\0'){
1481 leg_x = border;
1482 if (leg_c >= 2 && prt_fctn == 'j') {
1483 glue = (im->ximg - fill - 2* border) / (leg_c-1);
1484 } else {
1485 glue = 0;
1486 }
1487 if (prt_fctn =='c') leg_x = (im->ximg - fill) / 2.0;
1488 if (prt_fctn =='r') leg_x = im->ximg - fill - border;
1490 for(ii=mark;ii<=i;ii++){
1491 if(im->gdes[ii].legend[0]=='\0')
1492 continue; /* skip empty legends */
1493 im->gdes[ii].leg_x = leg_x;
1494 im->gdes[ii].leg_y = leg_y;
1495 leg_x +=
1496 gfx_get_text_width(im->canvas, leg_x,
1497 im->text_prop[TEXT_PROP_LEGEND].font,
1498 im->text_prop[TEXT_PROP_LEGEND].size,
1499 im->tabwidth,
1500 im->gdes[ii].legend, 0)
1501 + legspace[ii]
1502 + glue;
1503 }
1504 leg_y += im->text_prop[TEXT_PROP_LEGEND].size*1.8;
1505 if (prt_fctn == 's') leg_y -= im->text_prop[TEXT_PROP_LEGEND].size;
1506 fill = 0;
1507 leg_c = 0;
1508 mark = ii;
1509 }
1510 }
1511 im->yimg = leg_y;
1512 free(legspace);
1513 }
1514 return 0;
1515 }
1517 /* create a grid on the graph. it determines what to do
1518 from the values of xsize, start and end */
1520 /* the xaxis labels are determined from the number of seconds per pixel
1521 in the requested graph */
1525 int
1526 calc_horizontal_grid(image_desc_t *im)
1527 {
1528 double range;
1529 double scaledrange;
1530 int pixel,i;
1531 int gridind;
1532 int decimals, fractionals;
1534 im->ygrid_scale.labfact=2;
1535 gridind=-1;
1536 range = im->maxval - im->minval;
1537 scaledrange = range / im->magfact;
1539 /* does the scale of this graph make it impossible to put lines
1540 on it? If so, give up. */
1541 if (isnan(scaledrange)) {
1542 return 0;
1543 }
1545 /* find grid spaceing */
1546 pixel=1;
1547 if(isnan(im->ygridstep)){
1548 if(im->extra_flags & ALTYGRID) {
1549 /* find the value with max number of digits. Get number of digits */
1550 decimals = ceil(log10(max(fabs(im->maxval), fabs(im->minval))));
1551 if(decimals <= 0) /* everything is small. make place for zero */
1552 decimals = 1;
1554 fractionals = floor(log10(range));
1555 if(fractionals < 0) { /* small amplitude. */
1556 int len = decimals - fractionals + 1;
1557 if (im->unitslength < len) im->unitslength = len;
1558 sprintf(im->ygrid_scale.labfmt, "%%%d.%df", len, -fractionals + 1);
1559 } else {
1560 int len = decimals + 1;
1561 if (im->unitslength < len) im->unitslength = len;
1562 sprintf(im->ygrid_scale.labfmt, "%%%d.1f", len);
1563 }
1564 im->ygrid_scale.gridstep = pow((double)10, (double)fractionals);
1565 if(im->ygrid_scale.gridstep == 0) /* range is one -> 0.1 is reasonable scale */
1566 im->ygrid_scale.gridstep = 0.1;
1567 /* should have at least 5 lines but no more then 15 */
1568 if(range/im->ygrid_scale.gridstep < 5)
1569 im->ygrid_scale.gridstep /= 10;
1570 if(range/im->ygrid_scale.gridstep > 15)
1571 im->ygrid_scale.gridstep *= 10;
1572 if(range/im->ygrid_scale.gridstep > 5) {
1573 im->ygrid_scale.labfact = 1;
1574 if(range/im->ygrid_scale.gridstep > 8)
1575 im->ygrid_scale.labfact = 2;
1576 }
1577 else {
1578 im->ygrid_scale.gridstep /= 5;
1579 im->ygrid_scale.labfact = 5;
1580 }
1581 }
1582 else {
1583 for(i=0;ylab[i].grid > 0;i++){
1584 pixel = im->ysize / (scaledrange / ylab[i].grid);
1585 if (pixel > 7) {
1586 gridind = i;
1587 break;
1588 }
1589 }
1591 for(i=0; i<4;i++) {
1592 if (pixel * ylab[gridind].lfac[i] >= 2.5 * im->text_prop[TEXT_PROP_AXIS].size) {
1593 im->ygrid_scale.labfact = ylab[gridind].lfac[i];
1594 break;
1595 }
1596 }
1598 im->ygrid_scale.gridstep = ylab[gridind].grid * im->magfact;
1599 }
1600 } else {
1601 im->ygrid_scale.gridstep = im->ygridstep;
1602 im->ygrid_scale.labfact = im->ylabfact;
1603 }
1604 return 1;
1605 }
1607 int draw_horizontal_grid(image_desc_t *im)
1608 {
1609 int i;
1610 double scaledstep;
1611 char graph_label[100];
1612 double X0=im->xorigin;
1613 double X1=im->xorigin+im->xsize;
1615 int sgrid = (int)( im->minval / im->ygrid_scale.gridstep - 1);
1616 int egrid = (int)( im->maxval / im->ygrid_scale.gridstep + 1);
1617 double MaxY;
1618 scaledstep = im->ygrid_scale.gridstep/im->magfact;
1619 MaxY = scaledstep*(double)im->viewfactor*(double)egrid;
1620 for (i = sgrid; i <= egrid; i++){
1621 double Y0=ytr(im,im->ygrid_scale.gridstep*i);
1622 if ( Y0 >= im->yorigin-im->ysize
1623 && Y0 <= im->yorigin){
1624 if(i % im->ygrid_scale.labfact == 0){
1625 if (i==0 || im->symbol == ' ') {
1626 if(MaxY < 10) {
1627 if(im->extra_flags & ALTYGRID) {
1628 sprintf(graph_label,im->ygrid_scale.labfmt,scaledstep*im->viewfactor*i);
1629 }
1630 else {
1631 sprintf(graph_label,"%4.1f",scaledstep*im->viewfactor*i);
1632 }
1633 } else {
1634 sprintf(graph_label,"%4.0f",scaledstep*im->viewfactor*i);
1635 }
1636 }else {
1637 if(MaxY < 10){
1638 sprintf(graph_label,"%4.1f %c",scaledstep*im->viewfactor*i, im->symbol);
1639 } else {
1640 sprintf(graph_label,"%4.0f %c",scaledstep*im->viewfactor*i, im->symbol);
1641 }
1642 }
1644 gfx_new_text ( im->canvas,
1645 X0-im->text_prop[TEXT_PROP_AXIS].size, Y0,
1646 im->graph_col[GRC_FONT],
1647 im->text_prop[TEXT_PROP_AXIS].font,
1648 im->text_prop[TEXT_PROP_AXIS].size,
1649 im->tabwidth, 0.0, GFX_H_RIGHT, GFX_V_CENTER,
1650 graph_label );
1651 gfx_new_dashed_line ( im->canvas,
1652 X0-2,Y0,
1653 X1+2,Y0,
1654 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1655 im->grid_dash_on, im->grid_dash_off);
1657 } else if (!(im->extra_flags & NOMINOR)) {
1658 gfx_new_dashed_line ( im->canvas,
1659 X0-1,Y0,
1660 X1+1,Y0,
1661 GRIDWIDTH, im->graph_col[GRC_GRID],
1662 im->grid_dash_on, im->grid_dash_off);
1664 }
1665 }
1666 }
1667 return 1;
1668 }
1670 /* logaritmic horizontal grid */
1671 int
1672 horizontal_log_grid(image_desc_t *im)
1673 {
1674 double pixpex;
1675 int ii,i;
1676 int minoridx=0, majoridx=0;
1677 char graph_label[100];
1678 double X0,X1,Y0;
1679 double value, pixperstep, minstep;
1681 /* find grid spaceing */
1682 pixpex= (double)im->ysize / (log10(im->maxval) - log10(im->minval));
1684 if (isnan(pixpex)) {
1685 return 0;
1686 }
1688 for(i=0;yloglab[i][0] > 0;i++){
1689 minstep = log10(yloglab[i][0]);
1690 for(ii=1;yloglab[i][ii+1] > 0;ii++){
1691 if(yloglab[i][ii+2]==0){
1692 minstep = log10(yloglab[i][ii+1])-log10(yloglab[i][ii]);
1693 break;
1694 }
1695 }
1696 pixperstep = pixpex * minstep;
1697 if(pixperstep > 5){minoridx = i;}
1698 if(pixperstep > 2 * im->text_prop[TEXT_PROP_LEGEND].size){majoridx = i;}
1699 }
1701 X0=im->xorigin;
1702 X1=im->xorigin+im->xsize;
1703 /* paint minor grid */
1704 for (value = pow((double)10, log10(im->minval)
1705 - fmod(log10(im->minval),log10(yloglab[minoridx][0])));
1706 value <= im->maxval;
1707 value *= yloglab[minoridx][0]){
1708 if (value < im->minval) continue;
1709 i=0;
1710 while(yloglab[minoridx][++i] > 0){
1711 Y0 = ytr(im,value * yloglab[minoridx][i]);
1712 if (Y0 <= im->yorigin - im->ysize) break;
1713 gfx_new_dashed_line ( im->canvas,
1714 X0-1,Y0,
1715 X1+1,Y0,
1716 GRIDWIDTH, im->graph_col[GRC_GRID],
1717 im->grid_dash_on, im->grid_dash_off);
1718 }
1719 }
1721 /* paint major grid and labels*/
1722 for (value = pow((double)10, log10(im->minval)
1723 - fmod(log10(im->minval),log10(yloglab[majoridx][0])));
1724 value <= im->maxval;
1725 value *= yloglab[majoridx][0]){
1726 if (value < im->minval) continue;
1727 i=0;
1728 while(yloglab[majoridx][++i] > 0){
1729 Y0 = ytr(im,value * yloglab[majoridx][i]);
1730 if (Y0 <= im->yorigin - im->ysize) break;
1731 gfx_new_dashed_line ( im->canvas,
1732 X0-2,Y0,
1733 X1+2,Y0,
1734 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1735 im->grid_dash_on, im->grid_dash_off);
1737 sprintf(graph_label,"%3.0e",value * yloglab[majoridx][i]);
1738 gfx_new_text ( im->canvas,
1739 X0-im->text_prop[TEXT_PROP_AXIS].size, Y0,
1740 im->graph_col[GRC_FONT],
1741 im->text_prop[TEXT_PROP_AXIS].font,
1742 im->text_prop[TEXT_PROP_AXIS].size,
1743 im->tabwidth,0.0, GFX_H_RIGHT, GFX_V_CENTER,
1744 graph_label );
1745 }
1746 }
1747 return 1;
1748 }
1751 void
1752 vertical_grid(
1753 image_desc_t *im )
1754 {
1755 int xlab_sel; /* which sort of label and grid ? */
1756 time_t ti, tilab, timajor;
1757 long factor;
1758 char graph_label[100];
1759 double X0,Y0,Y1; /* points for filled graph and more*/
1760 struct tm tm;
1762 /* the type of time grid is determined by finding
1763 the number of seconds per pixel in the graph */
1766 if(im->xlab_user.minsec == -1){
1767 factor=(im->end - im->start)/im->xsize;
1768 xlab_sel=0;
1769 while ( xlab[xlab_sel+1].minsec != -1
1770 && xlab[xlab_sel+1].minsec <= factor){ xlab_sel++; }
1771 im->xlab_user.gridtm = xlab[xlab_sel].gridtm;
1772 im->xlab_user.gridst = xlab[xlab_sel].gridst;
1773 im->xlab_user.mgridtm = xlab[xlab_sel].mgridtm;
1774 im->xlab_user.mgridst = xlab[xlab_sel].mgridst;
1775 im->xlab_user.labtm = xlab[xlab_sel].labtm;
1776 im->xlab_user.labst = xlab[xlab_sel].labst;
1777 im->xlab_user.precis = xlab[xlab_sel].precis;
1778 im->xlab_user.stst = xlab[xlab_sel].stst;
1779 }
1781 /* y coords are the same for every line ... */
1782 Y0 = im->yorigin;
1783 Y1 = im->yorigin-im->ysize;
1786 /* paint the minor grid */
1787 if (!(im->extra_flags & NOMINOR))
1788 {
1789 for(ti = find_first_time(im->start,
1790 im->xlab_user.gridtm,
1791 im->xlab_user.gridst),
1792 timajor = find_first_time(im->start,
1793 im->xlab_user.mgridtm,
1794 im->xlab_user.mgridst);
1795 ti < im->end;
1796 ti = find_next_time(ti,im->xlab_user.gridtm,im->xlab_user.gridst)
1797 ){
1798 /* are we inside the graph ? */
1799 if (ti < im->start || ti > im->end) continue;
1800 while (timajor < ti) {
1801 timajor = find_next_time(timajor,
1802 im->xlab_user.mgridtm, im->xlab_user.mgridst);
1803 }
1804 if (ti == timajor) continue; /* skip as falls on major grid line */
1805 X0 = xtr(im,ti);
1806 gfx_new_dashed_line(im->canvas,X0,Y0+1, X0,Y1-1,GRIDWIDTH,
1807 im->graph_col[GRC_GRID],
1808 im->grid_dash_on, im->grid_dash_off);
1810 }
1811 }
1813 /* paint the major grid */
1814 for(ti = find_first_time(im->start,
1815 im->xlab_user.mgridtm,
1816 im->xlab_user.mgridst);
1817 ti < im->end;
1818 ti = find_next_time(ti,im->xlab_user.mgridtm,im->xlab_user.mgridst)
1819 ){
1820 /* are we inside the graph ? */
1821 if (ti < im->start || ti > im->end) continue;
1822 X0 = xtr(im,ti);
1823 gfx_new_dashed_line(im->canvas,X0,Y0+3, X0,Y1-2,MGRIDWIDTH,
1824 im->graph_col[GRC_MGRID],
1825 im->grid_dash_on, im->grid_dash_off);
1827 }
1828 /* paint the labels below the graph */
1829 for(ti = find_first_time(im->start - im->xlab_user.precis/2,
1830 im->xlab_user.labtm,
1831 im->xlab_user.labst);
1832 ti <= im->end - im->xlab_user.precis/2;
1833 ti = find_next_time(ti,im->xlab_user.labtm,im->xlab_user.labst)
1834 ){
1835 tilab= ti + im->xlab_user.precis/2; /* correct time for the label */
1836 /* are we inside the graph ? */
1837 if (tilab < im->start || tilab > im->end) continue;
1839 #if HAVE_STRFTIME
1840 localtime_r(&tilab, &tm);
1841 strftime(graph_label,99,im->xlab_user.stst, &tm);
1842 #else
1843 # error "your libc has no strftime I guess we'll abort the exercise here."
1844 #endif
1845 gfx_new_text ( im->canvas,
1846 xtr(im,tilab), Y0+im->text_prop[TEXT_PROP_AXIS].size,
1847 im->graph_col[GRC_FONT],
1848 im->text_prop[TEXT_PROP_AXIS].font,
1849 im->text_prop[TEXT_PROP_AXIS].size,
1850 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_TOP,
1851 graph_label );
1853 }
1855 }
1858 void
1859 axis_paint(
1860 image_desc_t *im
1861 )
1862 {
1863 /* draw x and y axis */
1864 /* gfx_new_line ( im->canvas, im->xorigin+im->xsize,im->yorigin,
1865 im->xorigin+im->xsize,im->yorigin-im->ysize,
1866 GRIDWIDTH, im->graph_col[GRC_AXIS]);
1868 gfx_new_line ( im->canvas, im->xorigin,im->yorigin-im->ysize,
1869 im->xorigin+im->xsize,im->yorigin-im->ysize,
1870 GRIDWIDTH, im->graph_col[GRC_AXIS]); */
1872 gfx_new_line ( im->canvas, im->xorigin-4,im->yorigin,
1873 im->xorigin+im->xsize+4,im->yorigin,
1874 MGRIDWIDTH, im->graph_col[GRC_AXIS]);
1876 gfx_new_line ( im->canvas, im->xorigin,im->yorigin+4,
1877 im->xorigin,im->yorigin-im->ysize-4,
1878 MGRIDWIDTH, im->graph_col[GRC_AXIS]);
1881 /* arrow for X and Y axis direction */
1882 gfx_new_area ( im->canvas,
1883 im->xorigin+im->xsize+2, im->yorigin-2,
1884 im->xorigin+im->xsize+2, im->yorigin+3,
1885 im->xorigin+im->xsize+7, im->yorigin+0.5, /* LINEOFFSET */
1886 im->graph_col[GRC_ARROW]);
1888 gfx_new_area ( im->canvas,
1889 im->xorigin-2, im->yorigin-im->ysize-2,
1890 im->xorigin+3, im->yorigin-im->ysize-2,
1891 im->xorigin+0.5, im->yorigin-im->ysize-7, /* LINEOFFSET */
1892 im->graph_col[GRC_ARROW]);
1894 }
1896 void
1897 grid_paint(image_desc_t *im)
1898 {
1899 long i;
1900 int res=0;
1901 double X0,Y0; /* points for filled graph and more*/
1902 gfx_node_t *node;
1904 /* draw 3d border */
1905 node = gfx_new_area (im->canvas, 0,im->yimg,
1906 2,im->yimg-2,
1907 2,2,im->graph_col[GRC_SHADEA]);
1908 gfx_add_point( node , im->ximg - 2, 2 );
1909 gfx_add_point( node , im->ximg, 0 );
1910 gfx_add_point( node , 0,0 );
1911 /* gfx_add_point( node , 0,im->yimg ); */
1913 node = gfx_new_area (im->canvas, 2,im->yimg-2,
1914 im->ximg-2,im->yimg-2,
1915 im->ximg - 2, 2,
1916 im->graph_col[GRC_SHADEB]);
1917 gfx_add_point( node , im->ximg,0);
1918 gfx_add_point( node , im->ximg,im->yimg);
1919 gfx_add_point( node , 0,im->yimg);
1920 /* gfx_add_point( node , 0,im->yimg ); */
1923 if (im->draw_x_grid == 1 )
1924 vertical_grid(im);
1926 if (im->draw_y_grid == 1){
1927 if(im->logarithmic){
1928 res = horizontal_log_grid(im);
1929 } else {
1930 res = draw_horizontal_grid(im);
1931 }
1933 /* dont draw horizontal grid if there is no min and max val */
1934 if (! res ) {
1935 char *nodata = "No Data found";
1936 gfx_new_text(im->canvas,im->ximg/2, (2*im->yorigin-im->ysize) / 2,
1937 im->graph_col[GRC_FONT],
1938 im->text_prop[TEXT_PROP_AXIS].font,
1939 im->text_prop[TEXT_PROP_AXIS].size,
1940 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_CENTER,
1941 nodata );
1942 }
1943 }
1945 /* yaxis unit description */
1946 gfx_new_text( im->canvas,
1947 10, (im->yorigin - im->ysize/2),
1948 im->graph_col[GRC_FONT],
1949 im->text_prop[TEXT_PROP_UNIT].font,
1950 im->text_prop[TEXT_PROP_UNIT].size, im->tabwidth,
1951 RRDGRAPH_YLEGEND_ANGLE,
1952 GFX_H_LEFT, GFX_V_CENTER,
1953 im->ylegend);
1955 /* graph title */
1956 gfx_new_text( im->canvas,
1957 im->ximg/2, im->text_prop[TEXT_PROP_TITLE].size*1.3+4,
1958 im->graph_col[GRC_FONT],
1959 im->text_prop[TEXT_PROP_TITLE].font,
1960 im->text_prop[TEXT_PROP_TITLE].size, im->tabwidth, 0.0,
1961 GFX_H_CENTER, GFX_V_CENTER,
1962 im->title);
1963 /* rrdtool 'logo' */
1964 gfx_new_text( im->canvas,
1965 im->ximg-7, 7,
1966 ( im->graph_col[GRC_FONT] & 0xffffff00 ) | 0x00000044,
1967 im->text_prop[TEXT_PROP_AXIS].font,
1968 5.5, im->tabwidth, 270,
1969 GFX_H_RIGHT, GFX_V_TOP,
1970 "RRDTOOL / TOBI OETIKER");
1972 /* graph labels */
1973 if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
1974 for(i=0;i<im->gdes_c;i++){
1975 if(im->gdes[i].legend[0] =='\0')
1976 continue;
1978 /* im->gdes[i].leg_y is the bottom of the legend */
1979 X0 = im->gdes[i].leg_x;
1980 Y0 = im->gdes[i].leg_y;
1981 gfx_new_text ( im->canvas, X0, Y0,
1982 im->graph_col[GRC_FONT],
1983 im->text_prop[TEXT_PROP_LEGEND].font,
1984 im->text_prop[TEXT_PROP_LEGEND].size,
1985 im->tabwidth,0.0, GFX_H_LEFT, GFX_V_BOTTOM,
1986 im->gdes[i].legend );
1987 /* The legend for GRAPH items starts with "M " to have
1988 enough space for the box */
1989 if ( im->gdes[i].gf != GF_PRINT &&
1990 im->gdes[i].gf != GF_GPRINT &&
1991 im->gdes[i].gf != GF_COMMENT) {
1992 int boxL, boxH, boxV;
1994 boxL = gfx_get_text_width(im->canvas, 0,
1995 im->text_prop[TEXT_PROP_LEGEND].font,
1996 im->text_prop[TEXT_PROP_LEGEND].size,
1997 im->tabwidth,"oo", 0);
1998 boxH = boxL / 1.9;
1999 boxV = boxH+1;
2001 /* make sure transparent colors show up all the same */
2002 node = gfx_new_area(im->canvas,
2003 X0-1,Y0-boxV,
2004 X0-1,Y0+1,
2005 X0+boxL+0.5,Y0+1,
2006 im->graph_col[GRC_BACK]);
2007 gfx_add_point ( node, X0+boxL+0.5, Y0-boxV );
2008 node = gfx_new_area(im->canvas,
2009 X0-1,Y0-boxV,
2010 X0-1,Y0,
2011 X0+boxH,Y0,
2012 im->graph_col[GRC_CANVAS]);
2013 gfx_add_point ( node, X0+boxH, Y0-boxV );
2015 node = gfx_new_area(im->canvas,
2016 X0-1,Y0-boxV,
2017 X0-1,Y0,
2018 X0+boxH,Y0,
2019 im->gdes[i].col);
2020 gfx_add_point ( node, X0+boxH, Y0-boxV );
2021 node = gfx_new_line(im->canvas,
2022 X0-1,Y0-boxV,
2023 X0-1,Y0,
2024 1,im->graph_col[GRC_FONT]);
2025 gfx_add_point(node,X0+boxH,Y0);
2026 gfx_add_point(node,X0+boxH,Y0-boxV);
2027 gfx_close_path(node);
2028 }
2029 }
2030 }
2031 }
2034 /*****************************************************
2035 * lazy check make sure we rely need to create this graph
2036 *****************************************************/
2038 int lazy_check(image_desc_t *im){
2039 FILE *fd = NULL;
2040 int size = 1;
2041 struct stat imgstat;
2043 if (im->lazy == 0) return 0; /* no lazy option */
2044 if (stat(im->graphfile,&imgstat) != 0)
2045 return 0; /* can't stat */
2046 /* one pixel in the existing graph is more then what we would
2047 change here ... */
2048 if (time(NULL) - imgstat.st_mtime >
2049 (im->end - im->start) / im->xsize)
2050 return 0;
2051 if ((fd = fopen(im->graphfile,"rb")) == NULL)
2052 return 0; /* the file does not exist */
2053 switch (im->canvas->imgformat) {
2054 case IF_PNG:
2055 size = PngSize(fd,&(im->ximg),&(im->yimg));
2056 break;
2057 default:
2058 size = 1;
2059 }
2060 fclose(fd);
2061 return size;
2062 }
2064 #ifdef WITH_PIECHART
2065 void
2066 pie_part(image_desc_t *im, gfx_color_t color,
2067 double PieCenterX, double PieCenterY, double Radius,
2068 double startangle, double endangle)
2069 {
2070 gfx_node_t *node;
2071 double angle;
2072 double step=M_PI/50; /* Number of iterations for the circle;
2073 ** 10 is definitely too low, more than
2074 ** 50 seems to be overkill
2075 */
2077 /* Strange but true: we have to work clockwise or else
2078 ** anti aliasing nor transparency don't work.
2079 **
2080 ** This test is here to make sure we do it right, also
2081 ** this makes the for...next loop more easy to implement.
2082 ** The return will occur if the user enters a negative number
2083 ** (which shouldn't be done according to the specs) or if the
2084 ** programmers do something wrong (which, as we all know, never
2085 ** happens anyway :)
2086 */
2087 if (endangle<startangle) return;
2089 /* Hidden feature: Radius decreases each full circle */
2090 angle=startangle;
2091 while (angle>=2*M_PI) {
2092 angle -= 2*M_PI;
2093 Radius *= 0.8;
2094 }
2096 node=gfx_new_area(im->canvas,
2097 PieCenterX+sin(startangle)*Radius,
2098 PieCenterY-cos(startangle)*Radius,
2099 PieCenterX,
2100 PieCenterY,
2101 PieCenterX+sin(endangle)*Radius,
2102 PieCenterY-cos(endangle)*Radius,
2103 color);
2104 for (angle=endangle;angle-startangle>=step;angle-=step) {
2105 gfx_add_point(node,
2106 PieCenterX+sin(angle)*Radius,
2107 PieCenterY-cos(angle)*Radius );
2108 }
2109 }
2111 #endif
2113 int
2114 graph_size_location(image_desc_t *im, int elements
2116 #ifdef WITH_PIECHART
2117 , int piechart
2118 #endif
2120 )
2121 {
2122 /* The actual size of the image to draw is determined from
2123 ** several sources. The size given on the command line is
2124 ** the graph area but we need more as we have to draw labels
2125 ** and other things outside the graph area
2126 */
2128 /* +-+-------------------------------------------+
2129 ** |l|.................title.....................|
2130 ** |e+--+-------------------------------+--------+
2131 ** |b| b| | |
2132 ** |a| a| | pie |
2133 ** |l| l| main graph area | chart |
2134 ** |.| .| | area |
2135 ** |t| y| | |
2136 ** |r+--+-------------------------------+--------+
2137 ** |e| | x-axis labels | |
2138 ** |v+--+-------------------------------+--------+
2139 ** | |..............legends......................|
2140 ** +-+-------------------------------------------+
2141 */
2142 int Xvertical=0,
2143 Ytitle =0,
2144 Xylabel =0,
2145 Xmain =0, Ymain =0,
2146 #ifdef WITH_PIECHART
2147 Xpie =0, Ypie =0,
2148 #endif
2149 Yxlabel =0,
2150 #if 0
2151 Xlegend =0, Ylegend =0,
2152 #endif
2153 Xspacing =15, Yspacing =15;
2155 if (im->extra_flags & ONLY_GRAPH) {
2156 im->xorigin =0;
2157 im->ximg = im->xsize;
2158 im->yimg = im->ysize;
2159 im->yorigin = im->ysize;
2160 return 0;
2161 }
2163 if (im->ylegend[0] != '\0' ) {
2164 Xvertical = im->text_prop[TEXT_PROP_UNIT].size *2;
2165 }
2168 if (im->title[0] != '\0') {
2169 /* The title is placed "inbetween" two text lines so it
2170 ** automatically has some vertical spacing. The horizontal
2171 ** spacing is added here, on each side.
2172 */
2173 /* don't care for the with of the title
2174 Xtitle = gfx_get_text_width(im->canvas, 0,
2175 im->text_prop[TEXT_PROP_TITLE].font,
2176 im->text_prop[TEXT_PROP_TITLE].size,
2177 im->tabwidth,
2178 im->title, 0) + 2*Xspacing; */
2179 Ytitle = im->text_prop[TEXT_PROP_TITLE].size*2.6+10;
2180 }
2182 if (elements) {
2183 Xmain=im->xsize;
2184 Ymain=im->ysize;
2185 if (im->draw_x_grid) {
2186 Yxlabel=im->text_prop[TEXT_PROP_AXIS].size *2.5;
2187 }
2188 if (im->draw_y_grid) {
2189 Xylabel=gfx_get_text_width(im->canvas, 0,
2190 im->text_prop[TEXT_PROP_AXIS].font,
2191 im->text_prop[TEXT_PROP_AXIS].size,
2192 im->tabwidth,
2193 "0", 0) * im->unitslength;
2194 }
2195 }
2197 #ifdef WITH_PIECHART
2198 if (piechart) {
2199 im->piesize=im->xsize<im->ysize?im->xsize:im->ysize;
2200 Xpie=im->piesize;
2201 Ypie=im->piesize;
2202 }
2203 #endif
2205 /* Now calculate the total size. Insert some spacing where
2206 desired. im->xorigin and im->yorigin need to correspond
2207 with the lower left corner of the main graph area or, if
2208 this one is not set, the imaginary box surrounding the
2209 pie chart area. */
2211 /* The legend width cannot yet be determined, as a result we
2212 ** have problems adjusting the image to it. For now, we just
2213 ** forget about it at all; the legend will have to fit in the
2214 ** size already allocated.
2215 */
2216 im->ximg = Xylabel + Xmain + 2 * Xspacing;
2218 #ifdef WITH_PIECHART
2219 im->ximg += Xpie;
2220 #endif
2222 if (Xmain) im->ximg += Xspacing;
2223 #ifdef WITH_PIECHART
2224 if (Xpie) im->ximg += Xspacing;
2225 #endif
2227 im->xorigin = Xspacing + Xylabel;
2229 /* the length of the title should not influence with width of the graph
2230 if (Xtitle > im->ximg) im->ximg = Xtitle; */
2232 if (Xvertical) { /* unit description */
2233 im->ximg += Xvertical;
2234 im->xorigin += Xvertical;
2235 }
2236 xtr(im,0);
2238 /* The vertical size is interesting... we need to compare
2239 ** the sum of {Ytitle, Ymain, Yxlabel, Ylegend} with Yvertical
2240 ** however we need to know {Ytitle+Ymain+Yxlabel} in order to
2241 ** start even thinking about Ylegend.
2242 **
2243 ** Do it in three portions: First calculate the inner part,
2244 ** then do the legend, then adjust the total height of the img.
2245 */
2247 /* reserve space for main and/or pie */
2249 im->yimg = Ymain + Yxlabel;
2251 #ifdef WITH_PIECHART
2252 if (im->yimg < Ypie) im->yimg = Ypie;
2253 #endif
2255 im->yorigin = im->yimg - Yxlabel;
2257 /* reserve space for the title *or* some padding above the graph */
2258 if (Ytitle) {
2259 im->yimg += Ytitle;
2260 im->yorigin += Ytitle;
2261 } else {
2262 im->yimg += 1.5*Yspacing;
2263 im->yorigin += 1.5*Yspacing;
2264 }
2265 /* reserve space for padding below the graph */
2266 im->yimg += Yspacing;
2267 ytr(im,DNAN);
2269 /* Determine where to place the legends onto the image.
2270 ** Adjust im->yimg to match the space requirements.
2271 */
2272 if(leg_place(im)==-1)
2273 return -1;
2276 #if 0
2277 if (Xlegend > im->ximg) {
2278 im->ximg = Xlegend;
2279 /* reposition Pie */
2280 }
2281 #endif
2283 #ifdef WITH_PIECHART
2284 /* The pie is placed in the upper right hand corner,
2285 ** just below the title (if any) and with sufficient
2286 ** padding.
2287 */
2288 if (elements) {
2289 im->pie_x = im->ximg - Xspacing - Xpie/2;
2290 im->pie_y = im->yorigin-Ymain+Ypie/2;
2291 } else {
2292 im->pie_x = im->ximg/2;
2293 im->pie_y = im->yorigin-Ypie/2;
2294 }
2295 #endif
2297 return 0;
2298 }
2300 /* draw that picture thing ... */
2301 int
2302 graph_paint(image_desc_t *im, char ***calcpr)
2303 {
2304 int i,ii;
2305 int lazy = lazy_check(im);
2306 #ifdef WITH_PIECHART
2307 int piechart = 0;
2308 double PieStart=0.0;
2309 #endif
2310 FILE *fo;
2311 gfx_node_t *node;
2313 double areazero = 0.0;
2314 enum gf_en stack_gf = GF_PRINT;
2315 graph_desc_t *lastgdes = NULL;
2317 /* if we are lazy and there is nothing to PRINT ... quit now */
2318 if (lazy && im->prt_c==0) return 0;
2320 /* pull the data from the rrd files ... */
2322 if(data_fetch(im)==-1)
2323 return -1;
2325 /* evaluate VDEF and CDEF operations ... */
2326 if(data_calc(im)==-1)
2327 return -1;
2329 #ifdef WITH_PIECHART
2330 /* check if we need to draw a piechart */
2331 for(i=0;i<im->gdes_c;i++){
2332 if (im->gdes[i].gf == GF_PART) {
2333 piechart=1;
2334 break;
2335 }
2336 }
2337 #endif
2339 /* calculate and PRINT and GPRINT definitions. We have to do it at
2340 * this point because it will affect the length of the legends
2341 * if there are no graph elements we stop here ...
2342 * if we are lazy, try to quit ...
2343 */
2344 i=print_calc(im,calcpr);
2345 if(i<0) return -1;
2346 if(((i==0)
2347 #ifdef WITH_PIECHART
2348 &&(piechart==0)
2349 #endif
2350 ) || lazy) return 0;
2352 #ifdef WITH_PIECHART
2353 /* If there's only the pie chart to draw, signal this */
2354 if (i==0) piechart=2;
2355 #endif
2357 /* get actual drawing data and find min and max values*/
2358 if(data_proc(im)==-1)
2359 return -1;
2361 if(!im->logarithmic){si_unit(im);} /* identify si magnitude Kilo, Mega Giga ? */
2363 if(!im->rigid && ! im->logarithmic)
2364 expand_range(im); /* make sure the upper and lower limit are
2365 sensible values */
2367 if (!calc_horizontal_grid(im))
2368 return -1;
2370 if (im->gridfit)
2371 apply_gridfit(im);
2374 /**************************************************************
2375 *** Calculating sizes and locations became a bit confusing ***
2376 *** so I moved this into a separate function. ***
2377 **************************************************************/
2378 if(graph_size_location(im,i
2379 #ifdef WITH_PIECHART
2380 ,piechart
2381 #endif
2382 )==-1)
2383 return -1;
2385 /* the actual graph is created by going through the individual
2386 graph elements and then drawing them */
2388 node=gfx_new_area ( im->canvas,
2389 0, 0,
2390 im->ximg, 0,
2391 im->ximg, im->yimg,
2392 im->graph_col[GRC_BACK]);
2394 gfx_add_point(node,0, im->yimg);
2396 #ifdef WITH_PIECHART
2397 if (piechart != 2) {
2398 #endif
2399 node=gfx_new_area ( im->canvas,
2400 im->xorigin, im->yorigin,
2401 im->xorigin + im->xsize, im->yorigin,
2402 im->xorigin + im->xsize, im->yorigin-im->ysize,
2403 im->graph_col[GRC_CANVAS]);
2405 gfx_add_point(node,im->xorigin, im->yorigin - im->ysize);
2407 if (im->minval > 0.0)
2408 areazero = im->minval;
2409 if (im->maxval < 0.0)
2410 areazero = im->maxval;
2411 #ifdef WITH_PIECHART
2412 }
2413 #endif
2415 #ifdef WITH_PIECHART
2416 if (piechart) {
2417 pie_part(im,im->graph_col[GRC_CANVAS],im->pie_x,im->pie_y,im->piesize*0.5,0,2*M_PI);
2418 }
2419 #endif
2421 for(i=0;i<im->gdes_c;i++){
2422 switch(im->gdes[i].gf){
2423 case GF_CDEF:
2424 case GF_VDEF:
2425 case GF_DEF:
2426 case GF_PRINT:
2427 case GF_GPRINT:
2428 case GF_COMMENT:
2429 case GF_HRULE:
2430 case GF_VRULE:
2431 case GF_XPORT:
2432 case GF_SHIFT:
2433 break;
2434 case GF_TICK:
2435 for (ii = 0; ii < im->xsize; ii++)
2436 {
2437 if (!isnan(im->gdes[i].p_data[ii]) &&
2438 im->gdes[i].p_data[ii] > 0.0)
2439 {
2440 /* generate a tick */
2441 gfx_new_line(im->canvas, im -> xorigin + ii,
2442 im -> yorigin - (im -> gdes[i].yrule * im -> ysize),
2443 im -> xorigin + ii,
2444 im -> yorigin,
2445 1.0,
2446 im -> gdes[i].col );
2447 }
2448 }
2449 break;
2450 case GF_LINE:
2451 case GF_AREA:
2452 stack_gf = im->gdes[i].gf;
2453 case GF_STACK:
2454 /* fix data points at oo and -oo */
2455 for(ii=0;ii<im->xsize;ii++){
2456 if (isinf(im->gdes[i].p_data[ii])){
2457 if (im->gdes[i].p_data[ii] > 0) {
2458 im->gdes[i].p_data[ii] = im->maxval ;
2459 } else {
2460 im->gdes[i].p_data[ii] = im->minval ;
2461 }
2463 }
2464 } /* for */
2466 /* *******************************************************
2467 a ___. (a,t)
2468 | | ___
2469 ____| | | |
2470 | |___|
2471 -------|--t-1--t--------------------------------
2473 if we know the value at time t was a then
2474 we draw a square from t-1 to t with the value a.
2476 ********************************************************* */
2477 if (im->gdes[i].col != 0x0){
2478 /* GF_LINE and friend */
2479 if(stack_gf == GF_LINE ){
2480 node = NULL;
2481 for(ii=1;ii<im->xsize;ii++){
2482 if (isnan(im->gdes[i].p_data[ii]) || (im->slopemode==1 && isnan(im->gdes[i].p_data[ii-1]))){
2483 node = NULL;
2484 continue;
2485 }
2486 if ( node == NULL ) {
2487 if ( im->slopemode == 0 ){
2488 node = gfx_new_line(im->canvas,
2489 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii]),
2490 ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]),
2491 im->gdes[i].linewidth,
2492 im->gdes[i].col);
2493 } else {
2494 node = gfx_new_line(im->canvas,
2495 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii-1]),
2496 ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]),
2497 im->gdes[i].linewidth,
2498 im->gdes[i].col);
2499 }
2500 } else {
2501 if ( im->slopemode==0 ){
2502 gfx_add_point(node,ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii]));
2503 };
2504 gfx_add_point(node,ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]));
2505 };
2507 }
2508 } else {
2509 double ybase0 = DNAN,ytop0=DNAN;
2510 for(ii=0;ii<im->xsize;ii++){
2511 /* keep things simple for now, just draw these bars
2512 do not try to build a big and complex area */
2513 double ybase,ytop;
2514 if ( im->slopemode == 0 && ii==0){
2515 continue;
2516 }
2517 if ( isnan(im->gdes[i].p_data[ii]) ) {
2518 ybase0 = DNAN;
2519 continue;
2520 }
2521 ytop = ytr(im,im->gdes[i].p_data[ii]);
2522 if ( lastgdes && im->gdes[i].stack ) {
2523 ybase = ytr(im,lastgdes->p_data[ii]);
2524 } else {
2525 ybase = ytr(im,areazero);
2526 }
2527 if ( ybase == ytop ){
2528 ybase0 = DNAN;
2529 continue;
2530 }
2531 /* every area has to be wound clock-wise,
2532 so we have to make sur base remains base */
2533 if (ybase > ytop){
2534 double extra = ytop;
2535 ytop = ybase;
2536 ybase = extra;
2537 }
2538 if ( im->slopemode == 0){
2539 ybase0 = ybase;
2540 ytop0 = ytop;
2541 }
2542 if ( !isnan(ybase0) ){
2543 node = gfx_new_area(im->canvas,
2544 (double)ii-1.2+(double)im->xorigin,ybase0-0.2,
2545 (double)ii-1.2+(double)im->xorigin,ytop0+0.2,
2546 (double)ii+0.2+(double)im->xorigin,ytop+0.2,
2547 im->gdes[i].col
2548 );
2549 gfx_add_point(node,
2550 (double)ii+0.02+im->xorigin,ybase-0.2
2551 );
2552 }
2553 ybase0=ybase;
2554 ytop0=ytop;
2555 }
2556 } /* else GF_LINE */
2557 } /* if color != 0x0 */
2558 /* make sure we do not run into trouble when stacking on NaN */
2559 for(ii=0;ii<im->xsize;ii++){
2560 if (isnan(im->gdes[i].p_data[ii])) {
2561 if (lastgdes && (im->gdes[i].stack)) {
2562 im->gdes[i].p_data[ii] = lastgdes->p_data[ii];
2563 } else {
2564 im->gdes[i].p_data[ii] = ytr(im,areazero);
2565 }
2566 }
2567 }
2568 lastgdes = &(im->gdes[i]);
2569 break;
2570 #ifdef WITH_PIECHART
2571 case GF_PART:
2572 if(isnan(im->gdes[i].yrule)) /* fetch variable */
2573 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2575 if (finite(im->gdes[i].yrule)) { /* even the fetched var can be NaN */
2576 pie_part(im,im->gdes[i].col,
2577 im->pie_x,im->pie_y,im->piesize*0.4,
2578 M_PI*2.0*PieStart/100.0,
2579 M_PI*2.0*(PieStart+im->gdes[i].yrule)/100.0);
2580 PieStart += im->gdes[i].yrule;
2581 }
2582 break;
2583 #endif
2585 } /* switch */
2586 }
2587 #ifdef WITH_PIECHART
2588 if (piechart==2) {
2589 im->draw_x_grid=0;
2590 im->draw_y_grid=0;
2591 }
2592 #endif
2595 /* grid_paint also does the text */
2596 if( !(im->extra_flags & ONLY_GRAPH) )
2597 grid_paint(im);
2600 if( !(im->extra_flags & ONLY_GRAPH) )
2601 axis_paint(im);
2603 /* the RULES are the last thing to paint ... */
2604 for(i=0;i<im->gdes_c;i++){
2606 switch(im->gdes[i].gf){
2607 case GF_HRULE:
2608 if(isnan(im->gdes[i].yrule)) { /* fetch variable */
2609 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2610 };
2611 if(im->gdes[i].yrule >= im->minval
2612 && im->gdes[i].yrule <= im->maxval)
2613 gfx_new_line(im->canvas,
2614 im->xorigin,ytr(im,im->gdes[i].yrule),
2615 im->xorigin+im->xsize,ytr(im,im->gdes[i].yrule),
2616 1.0,im->gdes[i].col);
2617 break;
2618 case GF_VRULE:
2619 if(im->gdes[i].xrule == 0) { /* fetch variable */
2620 im->gdes[i].xrule = im->gdes[im->gdes[i].vidx].vf.when;
2621 };
2622 if(im->gdes[i].xrule >= im->start
2623 && im->gdes[i].xrule <= im->end)
2624 gfx_new_line(im->canvas,
2625 xtr(im,im->gdes[i].xrule),im->yorigin,
2626 xtr(im,im->gdes[i].xrule),im->yorigin-im->ysize,
2627 1.0,im->gdes[i].col);
2628 break;
2629 default:
2630 break;
2631 }
2632 }
2635 if (strcmp(im->graphfile,"-")==0) {
2636 fo = im->graphhandle ? im->graphhandle : stdout;
2637 #if defined(WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
2638 /* Change translation mode for stdout to BINARY */
2639 _setmode( _fileno( fo ), O_BINARY );
2640 #endif
2641 } else {
2642 if ((fo = fopen(im->graphfile,"wb")) == NULL) {
2643 rrd_set_error("Opening '%s' for write: %s",im->graphfile,
2644 rrd_strerror(errno));
2645 return (-1);
2646 }
2647 }
2648 gfx_render (im->canvas,im->ximg,im->yimg,0x0,fo);
2649 if (strcmp(im->graphfile,"-") != 0)
2650 fclose(fo);
2651 return 0;
2652 }
2655 /*****************************************************
2656 * graph stuff
2657 *****************************************************/
2659 int
2660 gdes_alloc(image_desc_t *im){
2662 im->gdes_c++;
2663 if ((im->gdes = (graph_desc_t *) rrd_realloc(im->gdes, (im->gdes_c)
2664 * sizeof(graph_desc_t)))==NULL){
2665 rrd_set_error("realloc graph_descs");
2666 return -1;
2667 }
2670 im->gdes[im->gdes_c-1].step=im->step;
2671 im->gdes[im->gdes_c-1].stack=0;
2672 im->gdes[im->gdes_c-1].debug=0;
2673 im->gdes[im->gdes_c-1].start=im->start;
2674 im->gdes[im->gdes_c-1].end=im->end;
2675 im->gdes[im->gdes_c-1].vname[0]='\0';
2676 im->gdes[im->gdes_c-1].data=NULL;
2677 im->gdes[im->gdes_c-1].ds_namv=NULL;
2678 im->gdes[im->gdes_c-1].data_first=0;
2679 im->gdes[im->gdes_c-1].p_data=NULL;
2680 im->gdes[im->gdes_c-1].rpnp=NULL;
2681 im->gdes[im->gdes_c-1].shift=0;
2682 im->gdes[im->gdes_c-1].col = 0x0;
2683 im->gdes[im->gdes_c-1].legend[0]='\0';
2684 im->gdes[im->gdes_c-1].format[0]='\0';
2685 im->gdes[im->gdes_c-1].rrd[0]='\0';
2686 im->gdes[im->gdes_c-1].ds=-1;
2687 im->gdes[im->gdes_c-1].p_data=NULL;
2688 im->gdes[im->gdes_c-1].yrule=DNAN;
2689 im->gdes[im->gdes_c-1].xrule=0;
2690 return 0;
2691 }
2693 /* copies input untill the first unescaped colon is found
2694 or until input ends. backslashes have to be escaped as well */
2695 int
2696 scan_for_col(char *input, int len, char *output)
2697 {
2698 int inp,outp=0;
2699 for (inp=0;
2700 inp < len &&
2701 input[inp] != ':' &&
2702 input[inp] != '\0';
2703 inp++){
2704 if (input[inp] == '\\' &&
2705 input[inp+1] != '\0' &&
2706 (input[inp+1] == '\\' ||
2707 input[inp+1] == ':')){
2708 output[outp++] = input[++inp];
2709 }
2710 else {
2711 output[outp++] = input[inp];
2712 }
2713 }
2714 output[outp] = '\0';
2715 return inp;
2716 }
2717 /* Some surgery done on this function, it became ridiculously big.
2718 ** Things moved:
2719 ** - initializing now in rrd_graph_init()
2720 ** - options parsing now in rrd_graph_options()
2721 ** - script parsing now in rrd_graph_script()
2722 */
2723 int
2724 rrd_graph(int argc, char **argv, char ***prdata, int *xsize, int *ysize, FILE *stream, double *ymin, double *ymax)
2725 {
2726 image_desc_t im;
2727 rrd_graph_init(&im);
2728 im.graphhandle = stream;
2730 rrd_graph_options(argc,argv,&im);
2731 if (rrd_test_error()) {
2732 im_free(&im);
2733 return -1;
2734 }
2736 if (strlen(argv[optind])>=MAXPATH) {
2737 rrd_set_error("filename (including path) too long");
2738 im_free(&im);
2739 return -1;
2740 }
2741 strncpy(im.graphfile,argv[optind],MAXPATH-1);
2742 im.graphfile[MAXPATH-1]='\0';
2744 rrd_graph_script(argc,argv,&im,1);
2745 if (rrd_test_error()) {
2746 im_free(&im);
2747 return -1;
2748 }
2750 /* Everything is now read and the actual work can start */
2752 (*prdata)=NULL;
2753 if (graph_paint(&im,prdata)==-1){
2754 im_free(&im);
2755 return -1;
2756 }
2758 /* The image is generated and needs to be output.
2759 ** Also, if needed, print a line with information about the image.
2760 */
2762 *xsize=im.ximg;
2763 *ysize=im.yimg;
2764 *ymin=im.minval;
2765 *ymax=im.maxval;
2766 if (im.imginfo) {
2767 char *filename;
2768 if (!(*prdata)) {
2769 /* maybe prdata is not allocated yet ... lets do it now */
2770 if ((*prdata = calloc(2,sizeof(char *)))==NULL) {
2771 rrd_set_error("malloc imginfo");
2772 return -1;
2773 };
2774 }
2775 if(((*prdata)[0] = malloc((strlen(im.imginfo)+200+strlen(im.graphfile))*sizeof(char)))
2776 ==NULL){
2777 rrd_set_error("malloc imginfo");
2778 return -1;
2779 }
2780 filename=im.graphfile+strlen(im.graphfile);
2781 while(filename > im.graphfile) {
2782 if (*(filename-1)=='/' || *(filename-1)=='\\' ) break;
2783 filename--;
2784 }
2786 sprintf((*prdata)[0],im.imginfo,filename,(long)(im.canvas->zoom*im.ximg),(long)(im.canvas->zoom*im.yimg));
2787 }
2788 im_free(&im);
2789 return 0;
2790 }
2792 void
2793 rrd_graph_init(image_desc_t *im)
2794 {
2795 unsigned int i;
2797 #ifdef HAVE_TZSET
2798 tzset();
2799 #endif
2800 #ifdef HAVE_SETLOCALE
2801 setlocale(LC_TIME,"");
2802 #endif
2803 im->yorigin=0;
2804 im->xorigin=0;
2805 im->minval=0;
2806 im->xlab_user.minsec = -1;
2807 im->ximg=0;
2808 im->yimg=0;
2809 im->xsize = 400;
2810 im->ysize = 100;
2811 im->step = 0;
2812 im->ylegend[0] = '\0';
2813 im->title[0] = '\0';
2814 im->minval = DNAN;
2815 im->maxval = DNAN;
2816 im->unitsexponent= 9999;
2817 im->unitslength= 6;
2818 im->symbol = ' ';
2819 im->viewfactor = 1.0;
2820 im->extra_flags= 0;
2821 im->rigid = 0;
2822 im->gridfit = 1;
2823 im->imginfo = NULL;
2824 im->lazy = 0;
2825 im->slopemode = 0;
2826 im->logarithmic = 0;
2827 im->ygridstep = DNAN;
2828 im->draw_x_grid = 1;
2829 im->draw_y_grid = 1;
2830 im->base = 1000;
2831 im->prt_c = 0;
2832 im->gdes_c = 0;
2833 im->gdes = NULL;
2834 im->canvas = gfx_new_canvas();
2835 im->grid_dash_on = 1;
2836 im->grid_dash_off = 1;
2837 im->tabwidth = 40.0;
2839 for(i=0;i<DIM(graph_col);i++)
2840 im->graph_col[i]=graph_col[i];
2842 #if defined(WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
2843 {
2844 char *windir;
2845 char rrd_win_default_font[1000];
2846 windir = getenv("windir");
2847 /* %windir% is something like D:\windows or C:\winnt */
2848 if (windir != NULL) {
2849 strncpy(rrd_win_default_font,windir,999);
2850 rrd_win_default_font[999] = '\0';
2851 strcat(rrd_win_default_font,"\\fonts\\");
2852 strcat(rrd_win_default_font,RRD_DEFAULT_FONT);
2853 for(i=0;i<DIM(text_prop);i++){
2854 strncpy(text_prop[i].font,rrd_win_default_font,sizeof(text_prop[i].font)-1);
2855 text_prop[i].font[sizeof(text_prop[i].font)-1] = '\0';
2856 }
2857 }
2858 }
2859 #endif
2860 {
2861 char *deffont;
2862 deffont = getenv("RRD_DEFAULT_FONT");
2863 if (deffont != NULL) {
2864 for(i=0;i<DIM(text_prop);i++){
2865 strncpy(text_prop[i].font,deffont,sizeof(text_prop[i].font)-1);
2866 text_prop[i].font[sizeof(text_prop[i].font)-1] = '\0';
2867 }
2868 }
2869 }
2870 for(i=0;i<DIM(text_prop);i++){
2871 im->text_prop[i].size = text_prop[i].size;
2872 strcpy(im->text_prop[i].font,text_prop[i].font);
2873 }
2874 }
2876 void
2877 rrd_graph_options(int argc, char *argv[],image_desc_t *im)
2878 {
2879 int stroff;
2880 char *parsetime_error = NULL;
2881 char scan_gtm[12],scan_mtm[12],scan_ltm[12],col_nam[12];
2882 time_t start_tmp=0,end_tmp=0;
2883 long long_tmp;
2884 struct rrd_time_value start_tv, end_tv;
2885 gfx_color_t color;
2886 optind = 0; opterr = 0; /* initialize getopt */
2888 parsetime("end-24h", &start_tv);
2889 parsetime("now", &end_tv);
2891 while (1){
2892 static struct option long_options[] =
2893 {
2894 {"start", required_argument, 0, 's'},
2895 {"end", required_argument, 0, 'e'},
2896 {"x-grid", required_argument, 0, 'x'},
2897 {"y-grid", required_argument, 0, 'y'},
2898 {"vertical-label",required_argument,0,'v'},
2899 {"width", required_argument, 0, 'w'},
2900 {"height", required_argument, 0, 'h'},
2901 {"interlaced", no_argument, 0, 'i'},
2902 {"upper-limit",required_argument, 0, 'u'},
2903 {"lower-limit",required_argument, 0, 'l'},
2904 {"rigid", no_argument, 0, 'r'},
2905 {"base", required_argument, 0, 'b'},
2906 {"logarithmic",no_argument, 0, 'o'},
2907 {"color", required_argument, 0, 'c'},
2908 {"font", required_argument, 0, 'n'},
2909 {"title", required_argument, 0, 't'},
2910 {"imginfo", required_argument, 0, 'f'},
2911 {"imgformat", required_argument, 0, 'a'},
2912 {"lazy", no_argument, 0, 'z'},
2913 {"zoom", required_argument, 0, 'm'},
2914 {"no-legend", no_argument, 0, 'g'},
2915 {"force-rules-legend",no_argument,0, 'F'},
2916 {"only-graph", no_argument, 0, 'j'},
2917 {"alt-y-grid", no_argument, 0, 'Y'},
2918 {"no-minor", no_argument, 0, 'I'},
2919 {"slope-mode", no_argument, 0, 'E'},
2920 {"alt-autoscale", no_argument, 0, 'A'},
2921 {"alt-autoscale-max", no_argument, 0, 'M'},
2922 {"no-gridfit", no_argument, 0, 'N'},
2923 {"units-exponent",required_argument, 0, 'X'},
2924 {"units-length",required_argument, 0, 'L'},
2925 {"step", required_argument, 0, 'S'},
2926 {"tabwidth", required_argument, 0, 'T'},
2927 {"font-render-mode", required_argument, 0, 'R'},
2928 {"font-smoothing-threshold", required_argument, 0, 'B'},
2929 {0,0,0,0}};
2930 int option_index = 0;
2931 int opt;
2932 int col_start,col_end;
2934 opt = getopt_long(argc, argv,
2935 "s:e:x:y:v:w:h:iu:l:rb:oc:n:m:t:f:a:I:zgjFYAMEX:L:S:T:NR:B:",
2936 long_options, &option_index);
2938 if (opt == EOF)
2939 break;
2941 switch(opt) {
2942 case 'I':
2943 im->extra_flags |= NOMINOR;
2944 break;
2945 case 'Y':
2946 im->extra_flags |= ALTYGRID;
2947 break;
2948 case 'A':
2949 im->extra_flags |= ALTAUTOSCALE;
2950 break;
2951 case 'M':
2952 im->extra_flags |= ALTAUTOSCALE_MAX;
2953 break;
2954 case 'j':
2955 im->extra_flags |= ONLY_GRAPH;
2956 break;
2957 case 'g':
2958 im->extra_flags |= NOLEGEND;
2959 break;
2960 case 'F':
2961 im->extra_flags |= FORCE_RULES_LEGEND;
2962 break;
2963 case 'X':
2964 im->unitsexponent = atoi(optarg);
2965 break;
2966 case 'L':
2967 im->unitslength = atoi(optarg);
2968 break;
2969 case 'T':
2970 im->tabwidth = atof(optarg);
2971 break;
2972 case 'S':
2973 im->step = atoi(optarg);
2974 break;
2975 case 'N':
2976 im->gridfit = 0;
2977 break;
2978 case 's':
2979 if ((parsetime_error = parsetime(optarg, &start_tv))) {
2980 rrd_set_error( "start time: %s", parsetime_error );
2981 return;
2982 }
2983 break;
2984 case 'e':
2985 if ((parsetime_error = parsetime(optarg, &end_tv))) {
2986 rrd_set_error( "end time: %s", parsetime_error );
2987 return;
2988 }
2989 break;
2990 case 'x':
2991 if(strcmp(optarg,"none") == 0){
2992 im->draw_x_grid=0;
2993 break;
2994 };
2996 if(sscanf(optarg,
2997 "%10[A-Z]:%ld:%10[A-Z]:%ld:%10[A-Z]:%ld:%ld:%n",
2998 scan_gtm,
2999 &im->xlab_user.gridst,
3000 scan_mtm,
3001 &im->xlab_user.mgridst,
3002 scan_ltm,
3003 &im->xlab_user.labst,
3004 &im->xlab_user.precis,
3005 &stroff) == 7 && stroff != 0){
3006 strncpy(im->xlab_form, optarg+stroff, sizeof(im->xlab_form) - 1);
3007 im->xlab_form[sizeof(im->xlab_form)-1] = '\0';
3008 if((int)(im->xlab_user.gridtm = tmt_conv(scan_gtm)) == -1){
3009 rrd_set_error("unknown keyword %s",scan_gtm);
3010 return;
3011 } else if ((int)(im->xlab_user.mgridtm = tmt_conv(scan_mtm)) == -1){
3012 rrd_set_error("unknown keyword %s",scan_mtm);
3013 return;
3014 } else if ((int)(im->xlab_user.labtm = tmt_conv(scan_ltm)) == -1){
3015 rrd_set_error("unknown keyword %s",scan_ltm);
3016 return;
3017 }
3018 im->xlab_user.minsec = 1;
3019 im->xlab_user.stst = im->xlab_form;
3020 } else {
3021 rrd_set_error("invalid x-grid format");
3022 return;
3023 }
3024 break;
3025 case 'y':
3027 if(strcmp(optarg,"none") == 0){
3028 im->draw_y_grid=0;
3029 break;
3030 };
3032 if(sscanf(optarg,
3033 "%lf:%d",
3034 &im->ygridstep,
3035 &im->ylabfact) == 2) {
3036 if(im->ygridstep<=0){
3037 rrd_set_error("grid step must be > 0");
3038 return;
3039 } else if (im->ylabfact < 1){
3040 rrd_set_error("label factor must be > 0");
3041 return;
3042 }
3043 } else {
3044 rrd_set_error("invalid y-grid format");
3045 return;
3046 }
3047 break;
3048 case 'v':
3049 strncpy(im->ylegend,optarg,150);
3050 im->ylegend[150]='\0';
3051 break;
3052 case 'u':
3053 im->maxval = atof(optarg);
3054 break;
3055 case 'l':
3056 im->minval = atof(optarg);
3057 break;
3058 case 'b':
3059 im->base = atol(optarg);
3060 if(im->base != 1024 && im->base != 1000 ){
3061 rrd_set_error("the only sensible value for base apart from 1000 is 1024");
3062 return;
3063 }
3064 break;
3065 case 'w':
3066 long_tmp = atol(optarg);
3067 if (long_tmp < 10) {
3068 rrd_set_error("width below 10 pixels");
3069 return;
3070 }
3071 im->xsize = long_tmp;
3072 break;
3073 case 'h':
3074 long_tmp = atol(optarg);
3075 if (long_tmp < 10) {
3076 rrd_set_error("height below 10 pixels");
3077 return;
3078 }
3079 im->ysize = long_tmp;
3080 break;
3081 case 'i':
3082 im->canvas->interlaced = 1;
3083 break;
3084 case 'r':
3085 im->rigid = 1;
3086 break;
3087 case 'f':
3088 im->imginfo = optarg;
3089 break;
3090 case 'a':
3091 if((int)(im->canvas->imgformat = if_conv(optarg)) == -1) {
3092 rrd_set_error("unsupported graphics format '%s'",optarg);
3093 return;
3094 }
3095 break;
3096 case 'z':
3097 im->lazy = 1;
3098 break;
3099 case 'E':
3100 im->slopemode = 1;
3101 break;
3103 case 'o':
3104 im->logarithmic = 1;
3105 if (isnan(im->minval))
3106 im->minval=1;
3107 break;
3108 case 'c':
3109 if(sscanf(optarg,
3110 "%10[A-Z]#%n%8lx%n",
3111 col_nam,&col_start,&color,&col_end) == 2){
3112 int ci;
3113 int col_len = col_end - col_start;
3114 switch (col_len){
3115 case 6:
3116 color = (color << 8) + 0xff /* shift left by 8 */;
3117 break;
3118 case 8:
3119 break;
3120 default:
3121 rrd_set_error("the color format is #RRGGBB[AA]");
3122 return;
3123 }
3124 if((ci=grc_conv(col_nam)) != -1){
3125 im->graph_col[ci]=color;
3126 } else {
3127 rrd_set_error("invalid color name '%s'",col_nam);
3128 return;
3129 }
3130 } else {
3131 rrd_set_error("invalid color def format");
3132 return;
3133 }
3134 break;
3135 case 'n':{
3136 char prop[15];
3137 double size = 1;
3138 char font[1024];
3140 if(sscanf(optarg,
3141 "%10[A-Z]:%lf:%1000s",
3142 prop,&size,font) == 3){
3143 int sindex;
3144 if((sindex=text_prop_conv(prop)) != -1){
3145 im->text_prop[sindex].size=size;
3146 strcpy(im->text_prop[sindex].font,font);
3147 if (sindex==0) { /* the default */
3148 im->text_prop[TEXT_PROP_TITLE].size=size;
3149 strcpy(im->text_prop[TEXT_PROP_TITLE].font,font);
3150 im->text_prop[TEXT_PROP_AXIS].size=size;
3151 strcpy(im->text_prop[TEXT_PROP_AXIS].font,font);
3152 im->text_prop[TEXT_PROP_UNIT].size=size;
3153 strcpy(im->text_prop[TEXT_PROP_UNIT].font,font);
3154 im->text_prop[TEXT_PROP_LEGEND].size=size;
3155 strcpy(im->text_prop[TEXT_PROP_LEGEND].font,font);
3156 }
3157 } else {
3158 rrd_set_error("invalid fonttag '%s'",prop);
3159 return;
3160 }
3161 } else {
3162 rrd_set_error("invalid text property format");
3163 return;
3164 }
3165 break;
3166 }
3167 case 'm':
3168 im->canvas->zoom = atof(optarg);
3169 if (im->canvas->zoom <= 0.0) {
3170 rrd_set_error("zoom factor must be > 0");
3171 return;
3172 }
3173 break;
3174 case 't':
3175 strncpy(im->title,optarg,150);
3176 im->title[150]='\0';
3177 break;
3179 case 'R':
3180 if ( strcmp( optarg, "normal" ) == 0 )
3181 im->canvas->aa_type = AA_NORMAL;
3182 else if ( strcmp( optarg, "light" ) == 0 )
3183 im->canvas->aa_type = AA_LIGHT;
3184 else if ( strcmp( optarg, "mono" ) == 0 )
3185 im->canvas->aa_type = AA_NONE;
3186 else
3187 {
3188 rrd_set_error("unknown font-render-mode '%s'", optarg );
3189 return;
3190 }
3191 break;
3193 case 'B':
3194 im->canvas->font_aa_threshold = atof(optarg);
3195 break;
3197 case '?':
3198 if (optopt != 0)
3199 rrd_set_error("unknown option '%c'", optopt);
3200 else
3201 rrd_set_error("unknown option '%s'",argv[optind-1]);
3202 return;
3203 }
3204 }
3206 if (optind >= argc) {
3207 rrd_set_error("missing filename");
3208 return;
3209 }
3211 if (im->logarithmic == 1 && (im->minval <= 0 || isnan(im->minval))){
3212 rrd_set_error("for a logarithmic yaxis you must specify a lower-limit > 0");
3213 return;
3214 }
3216 if (proc_start_end(&start_tv,&end_tv,&start_tmp,&end_tmp) == -1){
3217 /* error string is set in parsetime.c */
3218 return;
3219 }
3221 if (start_tmp < 3600*24*365*10){
3222 rrd_set_error("the first entry to fetch should be after 1980 (%ld)",start_tmp);
3223 return;
3224 }
3226 if (end_tmp < start_tmp) {
3227 rrd_set_error("start (%ld) should be less than end (%ld)",
3228 start_tmp, end_tmp);
3229 return;
3230 }
3232 im->start = start_tmp;
3233 im->end = end_tmp;
3234 im->step = max((long)im->step, (im->end-im->start)/im->xsize);
3235 }
3237 int
3238 rrd_graph_check_vname(image_desc_t *im, char *varname, char *err)
3239 {
3240 if ((im->gdes[im->gdes_c-1].vidx=find_var(im,varname))==-1) {
3241 rrd_set_error("Unknown variable '%s' in %s",varname,err);
3242 return -1;
3243 }
3244 return 0;
3245 }
3246 int
3247 rrd_graph_color(image_desc_t *im, char *var, char *err, int optional)
3248 {
3249 char *color;
3250 graph_desc_t *gdp=&im->gdes[im->gdes_c-1];
3252 color=strstr(var,"#");
3253 if (color==NULL) {
3254 if (optional==0) {
3255 rrd_set_error("Found no color in %s",err);
3256 return 0;
3257 }
3258 return 0;
3259 } else {
3260 int n=0;
3261 char *rest;
3262 gfx_color_t col;
3264 rest=strstr(color,":");
3265 if (rest!=NULL)
3266 n=rest-color;
3267 else
3268 n=strlen(color);
3270 switch (n) {
3271 case 7:
3272 sscanf(color,"#%6lx%n",&col,&n);
3273 col = (col << 8) + 0xff /* shift left by 8 */;
3274 if (n!=7) rrd_set_error("Color problem in %s",err);
3275 break;
3276 case 9:
3277 sscanf(color,"#%8lx%n",&col,&n);
3278 if (n==9) break;
3279 default:
3280 rrd_set_error("Color problem in %s",err);
3281 }
3282 if (rrd_test_error()) return 0;
3283 gdp->col = col;
3284 return n;
3285 }
3286 }
3289 int bad_format(char *fmt) {
3290 char *ptr;
3291 int n=0;
3292 ptr = fmt;
3293 while (*ptr != '\0')
3294 if (*ptr++ == '%') {
3296 /* line cannot end with percent char */
3297 if (*ptr == '\0') return 1;
3299 /* '%s', '%S' and '%%' are allowed */
3300 if (*ptr == 's' || *ptr == 'S' || *ptr == '%') ptr++;
3302 /* or else '% 6.2lf' and such are allowed */
3303 else {
3305 /* optional padding character */
3306 if (*ptr == ' ' || *ptr == '+' || *ptr == '-') ptr++;
3308 /* This should take care of 'm.n' with all three optional */
3309 while (*ptr >= '0' && *ptr <= '9') ptr++;
3310 if (*ptr == '.') ptr++;
3311 while (*ptr >= '0' && *ptr <= '9') ptr++;
3313 /* Either 'le', 'lf' or 'lg' must follow here */
3314 if (*ptr++ != 'l') return 1;
3315 if (*ptr == 'e' || *ptr == 'f' || *ptr == 'g') ptr++;
3316 else return 1;
3317 n++;
3318 }
3319 }
3321 return (n!=1);
3322 }
3325 int
3326 vdef_parse(gdes,str)
3327 struct graph_desc_t *gdes;
3328 char *str;
3329 {
3330 /* A VDEF currently is either "func" or "param,func"
3331 * so the parsing is rather simple. Change if needed.
3332 */
3333 double param;
3334 char func[30];
3335 int n;
3337 n=0;
3338 sscanf(str,"%le,%29[A-Z]%n",¶m,func,&n);
3339 if (n== (int)strlen(str)) { /* matched */
3340 ;
3341 } else {
3342 n=0;
3343 sscanf(str,"%29[A-Z]%n",func,&n);
3344 if (n== (int)strlen(str)) { /* matched */
3345 param=DNAN;
3346 } else {
3347 rrd_set_error("Unknown function string '%s' in VDEF '%s'"
3348 ,str
3349 ,gdes->vname
3350 );
3351 return -1;
3352 }
3353 }
3354 if (!strcmp("PERCENT",func)) gdes->vf.op = VDEF_PERCENT;
3355 else if (!strcmp("MAXIMUM",func)) gdes->vf.op = VDEF_MAXIMUM;
3356 else if (!strcmp("AVERAGE",func)) gdes->vf.op = VDEF_AVERAGE;
3357 else if (!strcmp("MINIMUM",func)) gdes->vf.op = VDEF_MINIMUM;
3358 else if (!strcmp("TOTAL", func)) gdes->vf.op = VDEF_TOTAL;
3359 else if (!strcmp("FIRST", func)) gdes->vf.op = VDEF_FIRST;
3360 else if (!strcmp("LAST", func)) gdes->vf.op = VDEF_LAST;
3361 else {
3362 rrd_set_error("Unknown function '%s' in VDEF '%s'\n"
3363 ,func
3364 ,gdes->vname
3365 );
3366 return -1;
3367 };
3369 switch (gdes->vf.op) {
3370 case VDEF_PERCENT:
3371 if (isnan(param)) { /* no parameter given */
3372 rrd_set_error("Function '%s' needs parameter in VDEF '%s'\n"
3373 ,func
3374 ,gdes->vname
3375 );
3376 return -1;
3377 };
3378 if (param>=0.0 && param<=100.0) {
3379 gdes->vf.param = param;
3380 gdes->vf.val = DNAN; /* undefined */
3381 gdes->vf.when = 0; /* undefined */
3382 } else {
3383 rrd_set_error("Parameter '%f' out of range in VDEF '%s'\n"
3384 ,param
3385 ,gdes->vname
3386 );
3387 return -1;
3388 };
3389 break;
3390 case VDEF_MAXIMUM:
3391 case VDEF_AVERAGE:
3392 case VDEF_MINIMUM:
3393 case VDEF_TOTAL:
3394 case VDEF_FIRST:
3395 case VDEF_LAST:
3396 if (isnan(param)) {
3397 gdes->vf.param = DNAN;
3398 gdes->vf.val = DNAN;
3399 gdes->vf.when = 0;
3400 } else {
3401 rrd_set_error("Function '%s' needs no parameter in VDEF '%s'\n"
3402 ,func
3403 ,gdes->vname
3404 );
3405 return -1;
3406 };
3407 break;
3408 };
3409 return 0;
3410 }
3413 int
3414 vdef_calc(im,gdi)
3415 image_desc_t *im;
3416 int gdi;
3417 {
3418 graph_desc_t *src,*dst;
3419 rrd_value_t *data;
3420 long step,steps;
3422 dst = &im->gdes[gdi];
3423 src = &im->gdes[dst->vidx];
3424 data = src->data + src->ds;
3425 steps = (src->end - src->start) / src->step;
3427 #if 0
3428 printf("DEBUG: start == %lu, end == %lu, %lu steps\n"
3429 ,src->start
3430 ,src->end
3431 ,steps
3432 );
3433 #endif
3435 switch (dst->vf.op) {
3436 case VDEF_PERCENT: {
3437 rrd_value_t * array;
3438 int field;
3441 if ((array = malloc(steps*sizeof(double)))==NULL) {
3442 rrd_set_error("malloc VDEV_PERCENT");
3443 return -1;
3444 }
3445 for (step=0;step < steps; step++) {
3446 array[step]=data[step*src->ds_cnt];
3447 }
3448 qsort(array,step,sizeof(double),vdef_percent_compar);
3450 field = (steps-1)*dst->vf.param/100;
3451 dst->vf.val = array[field];
3452 dst->vf.when = 0; /* no time component */
3453 free(array);
3454 #if 0
3455 for(step=0;step<steps;step++)
3456 printf("DEBUG: %3li:%10.2f %c\n",step,array[step],step==field?'*':' ');
3457 #endif
3458 }
3459 break;
3460 case VDEF_MAXIMUM:
3461 step=0;
3462 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3463 if (step == steps) {
3464 dst->vf.val = DNAN;
3465 dst->vf.when = 0;
3466 } else {
3467 dst->vf.val = data[step*src->ds_cnt];
3468 dst->vf.when = src->start + (step+1)*src->step;
3469 }
3470 while (step != steps) {
3471 if (finite(data[step*src->ds_cnt])) {
3472 if (data[step*src->ds_cnt] > dst->vf.val) {
3473 dst->vf.val = data[step*src->ds_cnt];
3474 dst->vf.when = src->start + (step+1)*src->step;
3475 }
3476 }
3477 step++;
3478 }
3479 break;
3480 case VDEF_TOTAL:
3481 case VDEF_AVERAGE: {
3482 int cnt=0;
3483 double sum=0.0;
3484 for (step=0;step<steps;step++) {
3485 if (finite(data[step*src->ds_cnt])) {
3486 sum += data[step*src->ds_cnt];
3487 cnt ++;
3488 };
3489 }
3490 if (cnt) {
3491 if (dst->vf.op == VDEF_TOTAL) {
3492 dst->vf.val = sum*src->step;
3493 dst->vf.when = cnt*src->step; /* not really "when" */
3494 } else {
3495 dst->vf.val = sum/cnt;
3496 dst->vf.when = 0; /* no time component */
3497 };
3498 } else {
3499 dst->vf.val = DNAN;
3500 dst->vf.when = 0;
3501 }
3502 }
3503 break;
3504 case VDEF_MINIMUM:
3505 step=0;
3506 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3507 if (step == steps) {
3508 dst->vf.val = DNAN;
3509 dst->vf.when = 0;
3510 } else {
3511 dst->vf.val = data[step*src->ds_cnt];
3512 dst->vf.when = src->start + (step+1)*src->step;
3513 }
3514 while (step != steps) {
3515 if (finite(data[step*src->ds_cnt])) {
3516 if (data[step*src->ds_cnt] < dst->vf.val) {
3517 dst->vf.val = data[step*src->ds_cnt];
3518 dst->vf.when = src->start + (step+1)*src->step;
3519 }
3520 }
3521 step++;
3522 }
3523 break;
3524 case VDEF_FIRST:
3525 /* The time value returned here is one step before the
3526 * actual time value. This is the start of the first
3527 * non-NaN interval.
3528 */
3529 step=0;
3530 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3531 if (step == steps) { /* all entries were NaN */
3532 dst->vf.val = DNAN;
3533 dst->vf.when = 0;
3534 } else {
3535 dst->vf.val = data[step*src->ds_cnt];
3536 dst->vf.when = src->start + step*src->step;
3537 }
3538 break;
3539 case VDEF_LAST:
3540 /* The time value returned here is the
3541 * actual time value. This is the end of the last
3542 * non-NaN interval.
3543 */
3544 step=steps-1;
3545 while (step >= 0 && isnan(data[step*src->ds_cnt])) step--;
3546 if (step < 0) { /* all entries were NaN */
3547 dst->vf.val = DNAN;
3548 dst->vf.when = 0;
3549 } else {
3550 dst->vf.val = data[step*src->ds_cnt];
3551 dst->vf.when = src->start + (step+1)*src->step;
3552 }
3553 break;
3554 }
3555 return 0;
3556 }
3558 /* NaN < -INF < finite_values < INF */
3559 int
3560 vdef_percent_compar(a,b)
3561 const void *a,*b;
3562 {
3563 /* Equality is not returned; this doesn't hurt except
3564 * (maybe) for a little performance.
3565 */
3567 /* First catch NaN values. They are smallest */
3568 if (isnan( *(double *)a )) return -1;
3569 if (isnan( *(double *)b )) return 1;
3571 /* NaN doesn't reach this part so INF and -INF are extremes.
3572 * The sign from isinf() is compatible with the sign we return
3573 */
3574 if (isinf( *(double *)a )) return isinf( *(double *)a );
3575 if (isinf( *(double *)b )) return isinf( *(double *)b );
3577 /* If we reach this, both values must be finite */
3578 if ( *(double *)a < *(double *)b ) return -1; else return 1;
3579 }