2fae2583de02cfda0e96f5edeafac79a4dbfc292
1 /****************************************************************************
2 * RRDtool 1.2.4 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 scaledstep = im->ygrid_scale.gridstep/im->magfact;
1618 for (i = sgrid; i <= egrid; i++){
1619 double Y0=ytr(im,im->ygrid_scale.gridstep*i);
1620 if ( Y0 >= im->yorigin-im->ysize
1621 && Y0 <= im->yorigin){
1622 if(i % im->ygrid_scale.labfact == 0){
1623 if (i==0 || im->symbol == ' ') {
1624 if(scaledstep < 1){
1625 if(im->extra_flags & ALTYGRID) {
1626 sprintf(graph_label,im->ygrid_scale.labfmt,scaledstep*im->viewfactor*i);
1627 }
1628 else {
1629 sprintf(graph_label,"%4.1f",scaledstep*im->viewfactor*i);
1630 }
1631 } else {
1632 sprintf(graph_label,"%4.0f",scaledstep*im->viewfactor*i);
1633 }
1634 }else {
1635 if(scaledstep < 1){
1636 sprintf(graph_label,"%4.1f %c",scaledstep*im->viewfactor*i, im->symbol);
1637 } else {
1638 sprintf(graph_label,"%4.0f %c",scaledstep*im->viewfactor*i, im->symbol);
1639 }
1640 }
1642 gfx_new_text ( im->canvas,
1643 X0-im->text_prop[TEXT_PROP_AXIS].size, Y0,
1644 im->graph_col[GRC_FONT],
1645 im->text_prop[TEXT_PROP_AXIS].font,
1646 im->text_prop[TEXT_PROP_AXIS].size,
1647 im->tabwidth, 0.0, GFX_H_RIGHT, GFX_V_CENTER,
1648 graph_label );
1649 gfx_new_dashed_line ( im->canvas,
1650 X0-2,Y0,
1651 X1+2,Y0,
1652 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1653 im->grid_dash_on, im->grid_dash_off);
1655 } else if (!(im->extra_flags & NOMINOR)) {
1656 gfx_new_dashed_line ( im->canvas,
1657 X0-1,Y0,
1658 X1+1,Y0,
1659 GRIDWIDTH, im->graph_col[GRC_GRID],
1660 im->grid_dash_on, im->grid_dash_off);
1662 }
1663 }
1664 }
1665 return 1;
1666 }
1668 /* logaritmic horizontal grid */
1669 int
1670 horizontal_log_grid(image_desc_t *im)
1671 {
1672 double pixpex;
1673 int ii,i;
1674 int minoridx=0, majoridx=0;
1675 char graph_label[100];
1676 double X0,X1,Y0;
1677 double value, pixperstep, minstep;
1679 /* find grid spaceing */
1680 pixpex= (double)im->ysize / (log10(im->maxval) - log10(im->minval));
1682 if (isnan(pixpex)) {
1683 return 0;
1684 }
1686 for(i=0;yloglab[i][0] > 0;i++){
1687 minstep = log10(yloglab[i][0]);
1688 for(ii=1;yloglab[i][ii+1] > 0;ii++){
1689 if(yloglab[i][ii+2]==0){
1690 minstep = log10(yloglab[i][ii+1])-log10(yloglab[i][ii]);
1691 break;
1692 }
1693 }
1694 pixperstep = pixpex * minstep;
1695 if(pixperstep > 5){minoridx = i;}
1696 if(pixperstep > 2 * im->text_prop[TEXT_PROP_LEGEND].size){majoridx = i;}
1697 }
1699 X0=im->xorigin;
1700 X1=im->xorigin+im->xsize;
1701 /* paint minor grid */
1702 for (value = pow((double)10, log10(im->minval)
1703 - fmod(log10(im->minval),log10(yloglab[minoridx][0])));
1704 value <= im->maxval;
1705 value *= yloglab[minoridx][0]){
1706 if (value < im->minval) continue;
1707 i=0;
1708 while(yloglab[minoridx][++i] > 0){
1709 Y0 = ytr(im,value * yloglab[minoridx][i]);
1710 if (Y0 <= im->yorigin - im->ysize) break;
1711 gfx_new_dashed_line ( im->canvas,
1712 X0-1,Y0,
1713 X1+1,Y0,
1714 GRIDWIDTH, im->graph_col[GRC_GRID],
1715 im->grid_dash_on, im->grid_dash_off);
1716 }
1717 }
1719 /* paint major grid and labels*/
1720 for (value = pow((double)10, log10(im->minval)
1721 - fmod(log10(im->minval),log10(yloglab[majoridx][0])));
1722 value <= im->maxval;
1723 value *= yloglab[majoridx][0]){
1724 if (value < im->minval) continue;
1725 i=0;
1726 while(yloglab[majoridx][++i] > 0){
1727 Y0 = ytr(im,value * yloglab[majoridx][i]);
1728 if (Y0 <= im->yorigin - im->ysize) break;
1729 gfx_new_dashed_line ( im->canvas,
1730 X0-2,Y0,
1731 X1+2,Y0,
1732 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1733 im->grid_dash_on, im->grid_dash_off);
1735 sprintf(graph_label,"%3.0e",value * yloglab[majoridx][i]);
1736 gfx_new_text ( im->canvas,
1737 X0-im->text_prop[TEXT_PROP_AXIS].size, Y0,
1738 im->graph_col[GRC_FONT],
1739 im->text_prop[TEXT_PROP_AXIS].font,
1740 im->text_prop[TEXT_PROP_AXIS].size,
1741 im->tabwidth,0.0, GFX_H_RIGHT, GFX_V_CENTER,
1742 graph_label );
1743 }
1744 }
1745 return 1;
1746 }
1749 void
1750 vertical_grid(
1751 image_desc_t *im )
1752 {
1753 int xlab_sel; /* which sort of label and grid ? */
1754 time_t ti, tilab, timajor;
1755 long factor;
1756 char graph_label[100];
1757 double X0,Y0,Y1; /* points for filled graph and more*/
1758 struct tm tm;
1760 /* the type of time grid is determined by finding
1761 the number of seconds per pixel in the graph */
1764 if(im->xlab_user.minsec == -1){
1765 factor=(im->end - im->start)/im->xsize;
1766 xlab_sel=0;
1767 while ( xlab[xlab_sel+1].minsec != -1
1768 && xlab[xlab_sel+1].minsec <= factor){ xlab_sel++; }
1769 im->xlab_user.gridtm = xlab[xlab_sel].gridtm;
1770 im->xlab_user.gridst = xlab[xlab_sel].gridst;
1771 im->xlab_user.mgridtm = xlab[xlab_sel].mgridtm;
1772 im->xlab_user.mgridst = xlab[xlab_sel].mgridst;
1773 im->xlab_user.labtm = xlab[xlab_sel].labtm;
1774 im->xlab_user.labst = xlab[xlab_sel].labst;
1775 im->xlab_user.precis = xlab[xlab_sel].precis;
1776 im->xlab_user.stst = xlab[xlab_sel].stst;
1777 }
1779 /* y coords are the same for every line ... */
1780 Y0 = im->yorigin;
1781 Y1 = im->yorigin-im->ysize;
1784 /* paint the minor grid */
1785 if (!(im->extra_flags & NOMINOR))
1786 {
1787 for(ti = find_first_time(im->start,
1788 im->xlab_user.gridtm,
1789 im->xlab_user.gridst),
1790 timajor = find_first_time(im->start,
1791 im->xlab_user.mgridtm,
1792 im->xlab_user.mgridst);
1793 ti < im->end;
1794 ti = find_next_time(ti,im->xlab_user.gridtm,im->xlab_user.gridst)
1795 ){
1796 /* are we inside the graph ? */
1797 if (ti < im->start || ti > im->end) continue;
1798 while (timajor < ti) {
1799 timajor = find_next_time(timajor,
1800 im->xlab_user.mgridtm, im->xlab_user.mgridst);
1801 }
1802 if (ti == timajor) continue; /* skip as falls on major grid line */
1803 X0 = xtr(im,ti);
1804 gfx_new_dashed_line(im->canvas,X0,Y0+1, X0,Y1-1,GRIDWIDTH,
1805 im->graph_col[GRC_GRID],
1806 im->grid_dash_on, im->grid_dash_off);
1808 }
1809 }
1811 /* paint the major grid */
1812 for(ti = find_first_time(im->start,
1813 im->xlab_user.mgridtm,
1814 im->xlab_user.mgridst);
1815 ti < im->end;
1816 ti = find_next_time(ti,im->xlab_user.mgridtm,im->xlab_user.mgridst)
1817 ){
1818 /* are we inside the graph ? */
1819 if (ti < im->start || ti > im->end) continue;
1820 X0 = xtr(im,ti);
1821 gfx_new_dashed_line(im->canvas,X0,Y0+3, X0,Y1-2,MGRIDWIDTH,
1822 im->graph_col[GRC_MGRID],
1823 im->grid_dash_on, im->grid_dash_off);
1825 }
1826 /* paint the labels below the graph */
1827 for(ti = find_first_time(im->start - im->xlab_user.precis/2,
1828 im->xlab_user.labtm,
1829 im->xlab_user.labst);
1830 ti <= im->end - im->xlab_user.precis/2;
1831 ti = find_next_time(ti,im->xlab_user.labtm,im->xlab_user.labst)
1832 ){
1833 tilab= ti + im->xlab_user.precis/2; /* correct time for the label */
1834 /* are we inside the graph ? */
1835 if (tilab < im->start || tilab > im->end) continue;
1837 #if HAVE_STRFTIME
1838 localtime_r(&tilab, &tm);
1839 strftime(graph_label,99,im->xlab_user.stst, &tm);
1840 #else
1841 # error "your libc has no strftime I guess we'll abort the exercise here."
1842 #endif
1843 gfx_new_text ( im->canvas,
1844 xtr(im,tilab), Y0+im->text_prop[TEXT_PROP_AXIS].size,
1845 im->graph_col[GRC_FONT],
1846 im->text_prop[TEXT_PROP_AXIS].font,
1847 im->text_prop[TEXT_PROP_AXIS].size,
1848 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_TOP,
1849 graph_label );
1851 }
1853 }
1856 void
1857 axis_paint(
1858 image_desc_t *im
1859 )
1860 {
1861 /* draw x and y axis */
1862 /* gfx_new_line ( im->canvas, im->xorigin+im->xsize,im->yorigin,
1863 im->xorigin+im->xsize,im->yorigin-im->ysize,
1864 GRIDWIDTH, im->graph_col[GRC_AXIS]);
1866 gfx_new_line ( im->canvas, im->xorigin,im->yorigin-im->ysize,
1867 im->xorigin+im->xsize,im->yorigin-im->ysize,
1868 GRIDWIDTH, im->graph_col[GRC_AXIS]); */
1870 gfx_new_line ( im->canvas, im->xorigin-4,im->yorigin,
1871 im->xorigin+im->xsize+4,im->yorigin,
1872 MGRIDWIDTH, im->graph_col[GRC_AXIS]);
1874 gfx_new_line ( im->canvas, im->xorigin,im->yorigin+4,
1875 im->xorigin,im->yorigin-im->ysize-4,
1876 MGRIDWIDTH, im->graph_col[GRC_AXIS]);
1879 /* arrow for X and Y axis direction */
1880 gfx_new_area ( im->canvas,
1881 im->xorigin+im->xsize+2, im->yorigin-2,
1882 im->xorigin+im->xsize+2, im->yorigin+3,
1883 im->xorigin+im->xsize+7, im->yorigin+0.5, /* LINEOFFSET */
1884 im->graph_col[GRC_ARROW]);
1886 gfx_new_area ( im->canvas,
1887 im->xorigin-2, im->yorigin-im->ysize-2,
1888 im->xorigin+3, im->yorigin-im->ysize-2,
1889 im->xorigin+0.5, im->yorigin-im->ysize-7, /* LINEOFFSET */
1890 im->graph_col[GRC_ARROW]);
1892 }
1894 void
1895 grid_paint(image_desc_t *im)
1896 {
1897 long i;
1898 int res=0;
1899 double X0,Y0; /* points for filled graph and more*/
1900 gfx_node_t *node;
1902 /* draw 3d border */
1903 node = gfx_new_area (im->canvas, 0,im->yimg,
1904 2,im->yimg-2,
1905 2,2,im->graph_col[GRC_SHADEA]);
1906 gfx_add_point( node , im->ximg - 2, 2 );
1907 gfx_add_point( node , im->ximg, 0 );
1908 gfx_add_point( node , 0,0 );
1909 /* gfx_add_point( node , 0,im->yimg ); */
1911 node = gfx_new_area (im->canvas, 2,im->yimg-2,
1912 im->ximg-2,im->yimg-2,
1913 im->ximg - 2, 2,
1914 im->graph_col[GRC_SHADEB]);
1915 gfx_add_point( node , im->ximg,0);
1916 gfx_add_point( node , im->ximg,im->yimg);
1917 gfx_add_point( node , 0,im->yimg);
1918 /* gfx_add_point( node , 0,im->yimg ); */
1921 if (im->draw_x_grid == 1 )
1922 vertical_grid(im);
1924 if (im->draw_y_grid == 1){
1925 if(im->logarithmic){
1926 res = horizontal_log_grid(im);
1927 } else {
1928 res = draw_horizontal_grid(im);
1929 }
1931 /* dont draw horizontal grid if there is no min and max val */
1932 if (! res ) {
1933 char *nodata = "No Data found";
1934 gfx_new_text(im->canvas,im->ximg/2, (2*im->yorigin-im->ysize) / 2,
1935 im->graph_col[GRC_FONT],
1936 im->text_prop[TEXT_PROP_AXIS].font,
1937 im->text_prop[TEXT_PROP_AXIS].size,
1938 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_CENTER,
1939 nodata );
1940 }
1941 }
1943 /* yaxis unit description */
1944 gfx_new_text( im->canvas,
1945 10, (im->yorigin - im->ysize/2),
1946 im->graph_col[GRC_FONT],
1947 im->text_prop[TEXT_PROP_UNIT].font,
1948 im->text_prop[TEXT_PROP_UNIT].size, im->tabwidth,
1949 RRDGRAPH_YLEGEND_ANGLE,
1950 GFX_H_LEFT, GFX_V_CENTER,
1951 im->ylegend);
1953 /* graph title */
1954 gfx_new_text( im->canvas,
1955 im->ximg/2, im->text_prop[TEXT_PROP_TITLE].size*1.3+4,
1956 im->graph_col[GRC_FONT],
1957 im->text_prop[TEXT_PROP_TITLE].font,
1958 im->text_prop[TEXT_PROP_TITLE].size, im->tabwidth, 0.0,
1959 GFX_H_CENTER, GFX_V_CENTER,
1960 im->title);
1961 /* rrdtool 'logo' */
1962 gfx_new_text( im->canvas,
1963 im->ximg-7, 7,
1964 ( im->graph_col[GRC_FONT] & 0xffffff00 ) | 0x00000044,
1965 im->text_prop[TEXT_PROP_AXIS].font,
1966 5.5, im->tabwidth, 270,
1967 GFX_H_RIGHT, GFX_V_TOP,
1968 "RRDTOOL / TOBI OETIKER");
1970 /* graph labels */
1971 if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
1972 for(i=0;i<im->gdes_c;i++){
1973 if(im->gdes[i].legend[0] =='\0')
1974 continue;
1976 /* im->gdes[i].leg_y is the bottom of the legend */
1977 X0 = im->gdes[i].leg_x;
1978 Y0 = im->gdes[i].leg_y;
1979 gfx_new_text ( im->canvas, X0, Y0,
1980 im->graph_col[GRC_FONT],
1981 im->text_prop[TEXT_PROP_LEGEND].font,
1982 im->text_prop[TEXT_PROP_LEGEND].size,
1983 im->tabwidth,0.0, GFX_H_LEFT, GFX_V_BOTTOM,
1984 im->gdes[i].legend );
1985 /* The legend for GRAPH items starts with "M " to have
1986 enough space for the box */
1987 if ( im->gdes[i].gf != GF_PRINT &&
1988 im->gdes[i].gf != GF_GPRINT &&
1989 im->gdes[i].gf != GF_COMMENT) {
1990 int boxL, boxH, boxV;
1992 boxL = gfx_get_text_width(im->canvas, 0,
1993 im->text_prop[TEXT_PROP_LEGEND].font,
1994 im->text_prop[TEXT_PROP_LEGEND].size,
1995 im->tabwidth,"oo", 0);
1996 boxH = boxL / 1.9;
1997 boxV = boxH+1;
1999 /* make sure transparent colors show up all the same */
2000 node = gfx_new_area(im->canvas,
2001 X0-1,Y0-boxV,
2002 X0-1,Y0+1,
2003 X0+boxL+0.5,Y0+1,
2004 im->graph_col[GRC_BACK]);
2005 gfx_add_point ( node, X0+boxL+0.5, Y0-boxV );
2006 node = gfx_new_area(im->canvas,
2007 X0-1,Y0-boxV,
2008 X0-1,Y0,
2009 X0+boxH,Y0,
2010 im->graph_col[GRC_CANVAS]);
2011 gfx_add_point ( node, X0+boxH, Y0-boxV );
2013 node = gfx_new_area(im->canvas,
2014 X0-1,Y0-boxV,
2015 X0-1,Y0,
2016 X0+boxH,Y0,
2017 im->gdes[i].col);
2018 gfx_add_point ( node, X0+boxH, Y0-boxV );
2019 node = gfx_new_line(im->canvas,
2020 X0-1,Y0-boxV,
2021 X0-1,Y0,
2022 1,im->graph_col[GRC_FONT]);
2023 gfx_add_point(node,X0+boxH,Y0);
2024 gfx_add_point(node,X0+boxH,Y0-boxV);
2025 gfx_close_path(node);
2026 }
2027 }
2028 }
2029 }
2032 /*****************************************************
2033 * lazy check make sure we rely need to create this graph
2034 *****************************************************/
2036 int lazy_check(image_desc_t *im){
2037 FILE *fd = NULL;
2038 int size = 1;
2039 struct stat imgstat;
2041 if (im->lazy == 0) return 0; /* no lazy option */
2042 if (stat(im->graphfile,&imgstat) != 0)
2043 return 0; /* can't stat */
2044 /* one pixel in the existing graph is more then what we would
2045 change here ... */
2046 if (time(NULL) - imgstat.st_mtime >
2047 (im->end - im->start) / im->xsize)
2048 return 0;
2049 if ((fd = fopen(im->graphfile,"rb")) == NULL)
2050 return 0; /* the file does not exist */
2051 switch (im->canvas->imgformat) {
2052 case IF_PNG:
2053 size = PngSize(fd,&(im->ximg),&(im->yimg));
2054 break;
2055 default:
2056 size = 1;
2057 }
2058 fclose(fd);
2059 return size;
2060 }
2062 #ifdef WITH_PIECHART
2063 void
2064 pie_part(image_desc_t *im, gfx_color_t color,
2065 double PieCenterX, double PieCenterY, double Radius,
2066 double startangle, double endangle)
2067 {
2068 gfx_node_t *node;
2069 double angle;
2070 double step=M_PI/50; /* Number of iterations for the circle;
2071 ** 10 is definitely too low, more than
2072 ** 50 seems to be overkill
2073 */
2075 /* Strange but true: we have to work clockwise or else
2076 ** anti aliasing nor transparency don't work.
2077 **
2078 ** This test is here to make sure we do it right, also
2079 ** this makes the for...next loop more easy to implement.
2080 ** The return will occur if the user enters a negative number
2081 ** (which shouldn't be done according to the specs) or if the
2082 ** programmers do something wrong (which, as we all know, never
2083 ** happens anyway :)
2084 */
2085 if (endangle<startangle) return;
2087 /* Hidden feature: Radius decreases each full circle */
2088 angle=startangle;
2089 while (angle>=2*M_PI) {
2090 angle -= 2*M_PI;
2091 Radius *= 0.8;
2092 }
2094 node=gfx_new_area(im->canvas,
2095 PieCenterX+sin(startangle)*Radius,
2096 PieCenterY-cos(startangle)*Radius,
2097 PieCenterX,
2098 PieCenterY,
2099 PieCenterX+sin(endangle)*Radius,
2100 PieCenterY-cos(endangle)*Radius,
2101 color);
2102 for (angle=endangle;angle-startangle>=step;angle-=step) {
2103 gfx_add_point(node,
2104 PieCenterX+sin(angle)*Radius,
2105 PieCenterY-cos(angle)*Radius );
2106 }
2107 }
2109 #endif
2111 int
2112 graph_size_location(image_desc_t *im, int elements
2114 #ifdef WITH_PIECHART
2115 , int piechart
2116 #endif
2118 )
2119 {
2120 /* The actual size of the image to draw is determined from
2121 ** several sources. The size given on the command line is
2122 ** the graph area but we need more as we have to draw labels
2123 ** and other things outside the graph area
2124 */
2126 /* +-+-------------------------------------------+
2127 ** |l|.................title.....................|
2128 ** |e+--+-------------------------------+--------+
2129 ** |b| b| | |
2130 ** |a| a| | pie |
2131 ** |l| l| main graph area | chart |
2132 ** |.| .| | area |
2133 ** |t| y| | |
2134 ** |r+--+-------------------------------+--------+
2135 ** |e| | x-axis labels | |
2136 ** |v+--+-------------------------------+--------+
2137 ** | |..............legends......................|
2138 ** +-+-------------------------------------------+
2139 */
2140 int Xvertical=0,
2141 Ytitle =0,
2142 Xylabel =0,
2143 Xmain =0, Ymain =0,
2144 #ifdef WITH_PIECHART
2145 Xpie =0, Ypie =0,
2146 #endif
2147 Yxlabel =0,
2148 #if 0
2149 Xlegend =0, Ylegend =0,
2150 #endif
2151 Xspacing =15, Yspacing =15;
2153 if (im->extra_flags & ONLY_GRAPH) {
2154 im->xorigin =0;
2155 im->ximg = im->xsize;
2156 im->yimg = im->ysize;
2157 im->yorigin = im->ysize;
2158 return 0;
2159 }
2161 if (im->ylegend[0] != '\0' ) {
2162 Xvertical = im->text_prop[TEXT_PROP_UNIT].size *2;
2163 }
2166 if (im->title[0] != '\0') {
2167 /* The title is placed "inbetween" two text lines so it
2168 ** automatically has some vertical spacing. The horizontal
2169 ** spacing is added here, on each side.
2170 */
2171 /* don't care for the with of the title
2172 Xtitle = gfx_get_text_width(im->canvas, 0,
2173 im->text_prop[TEXT_PROP_TITLE].font,
2174 im->text_prop[TEXT_PROP_TITLE].size,
2175 im->tabwidth,
2176 im->title, 0) + 2*Xspacing; */
2177 Ytitle = im->text_prop[TEXT_PROP_TITLE].size*2.6+10;
2178 }
2180 if (elements) {
2181 Xmain=im->xsize;
2182 Ymain=im->ysize;
2183 if (im->draw_x_grid) {
2184 Yxlabel=im->text_prop[TEXT_PROP_AXIS].size *2.5;
2185 }
2186 if (im->draw_y_grid) {
2187 Xylabel=gfx_get_text_width(im->canvas, 0,
2188 im->text_prop[TEXT_PROP_AXIS].font,
2189 im->text_prop[TEXT_PROP_AXIS].size,
2190 im->tabwidth,
2191 "0", 0) * im->unitslength;
2192 }
2193 }
2195 #ifdef WITH_PIECHART
2196 if (piechart) {
2197 im->piesize=im->xsize<im->ysize?im->xsize:im->ysize;
2198 Xpie=im->piesize;
2199 Ypie=im->piesize;
2200 }
2201 #endif
2203 /* Now calculate the total size. Insert some spacing where
2204 desired. im->xorigin and im->yorigin need to correspond
2205 with the lower left corner of the main graph area or, if
2206 this one is not set, the imaginary box surrounding the
2207 pie chart area. */
2209 /* The legend width cannot yet be determined, as a result we
2210 ** have problems adjusting the image to it. For now, we just
2211 ** forget about it at all; the legend will have to fit in the
2212 ** size already allocated.
2213 */
2214 im->ximg = Xylabel + Xmain + 2 * Xspacing;
2216 #ifdef WITH_PIECHART
2217 im->ximg += Xpie;
2218 #endif
2220 if (Xmain) im->ximg += Xspacing;
2221 #ifdef WITH_PIECHART
2222 if (Xpie) im->ximg += Xspacing;
2223 #endif
2225 im->xorigin = Xspacing + Xylabel;
2227 /* the length of the title should not influence with width of the graph
2228 if (Xtitle > im->ximg) im->ximg = Xtitle; */
2230 if (Xvertical) { /* unit description */
2231 im->ximg += Xvertical;
2232 im->xorigin += Xvertical;
2233 }
2234 xtr(im,0);
2236 /* The vertical size is interesting... we need to compare
2237 ** the sum of {Ytitle, Ymain, Yxlabel, Ylegend} with Yvertical
2238 ** however we need to know {Ytitle+Ymain+Yxlabel} in order to
2239 ** start even thinking about Ylegend.
2240 **
2241 ** Do it in three portions: First calculate the inner part,
2242 ** then do the legend, then adjust the total height of the img.
2243 */
2245 /* reserve space for main and/or pie */
2247 im->yimg = Ymain + Yxlabel;
2249 #ifdef WITH_PIECHART
2250 if (im->yimg < Ypie) im->yimg = Ypie;
2251 #endif
2253 im->yorigin = im->yimg - Yxlabel;
2255 /* reserve space for the title *or* some padding above the graph */
2256 if (Ytitle) {
2257 im->yimg += Ytitle;
2258 im->yorigin += Ytitle;
2259 } else {
2260 im->yimg += 1.5*Yspacing;
2261 im->yorigin += 1.5*Yspacing;
2262 }
2263 /* reserve space for padding below the graph */
2264 im->yimg += Yspacing;
2265 ytr(im,DNAN);
2267 /* Determine where to place the legends onto the image.
2268 ** Adjust im->yimg to match the space requirements.
2269 */
2270 if(leg_place(im)==-1)
2271 return -1;
2274 #if 0
2275 if (Xlegend > im->ximg) {
2276 im->ximg = Xlegend;
2277 /* reposition Pie */
2278 }
2279 #endif
2281 #ifdef WITH_PIECHART
2282 /* The pie is placed in the upper right hand corner,
2283 ** just below the title (if any) and with sufficient
2284 ** padding.
2285 */
2286 if (elements) {
2287 im->pie_x = im->ximg - Xspacing - Xpie/2;
2288 im->pie_y = im->yorigin-Ymain+Ypie/2;
2289 } else {
2290 im->pie_x = im->ximg/2;
2291 im->pie_y = im->yorigin-Ypie/2;
2292 }
2293 #endif
2295 return 0;
2296 }
2298 /* draw that picture thing ... */
2299 int
2300 graph_paint(image_desc_t *im, char ***calcpr)
2301 {
2302 int i,ii;
2303 int lazy = lazy_check(im);
2304 #ifdef WITH_PIECHART
2305 int piechart = 0;
2306 double PieStart=0.0;
2307 #endif
2308 FILE *fo;
2309 gfx_node_t *node;
2311 double areazero = 0.0;
2312 enum gf_en stack_gf = GF_PRINT;
2313 graph_desc_t *lastgdes = NULL;
2315 /* if we are lazy and there is nothing to PRINT ... quit now */
2316 if (lazy && im->prt_c==0) return 0;
2318 /* pull the data from the rrd files ... */
2320 if(data_fetch(im)==-1)
2321 return -1;
2323 /* evaluate VDEF and CDEF operations ... */
2324 if(data_calc(im)==-1)
2325 return -1;
2327 #ifdef WITH_PIECHART
2328 /* check if we need to draw a piechart */
2329 for(i=0;i<im->gdes_c;i++){
2330 if (im->gdes[i].gf == GF_PART) {
2331 piechart=1;
2332 break;
2333 }
2334 }
2335 #endif
2337 /* calculate and PRINT and GPRINT definitions. We have to do it at
2338 * this point because it will affect the length of the legends
2339 * if there are no graph elements we stop here ...
2340 * if we are lazy, try to quit ...
2341 */
2342 i=print_calc(im,calcpr);
2343 if(i<0) return -1;
2344 if(((i==0)
2345 #ifdef WITH_PIECHART
2346 &&(piechart==0)
2347 #endif
2348 ) || lazy) return 0;
2350 #ifdef WITH_PIECHART
2351 /* If there's only the pie chart to draw, signal this */
2352 if (i==0) piechart=2;
2353 #endif
2355 /* get actual drawing data and find min and max values*/
2356 if(data_proc(im)==-1)
2357 return -1;
2359 if(!im->logarithmic){si_unit(im);} /* identify si magnitude Kilo, Mega Giga ? */
2361 if(!im->rigid && ! im->logarithmic)
2362 expand_range(im); /* make sure the upper and lower limit are
2363 sensible values */
2365 if (!calc_horizontal_grid(im))
2366 return -1;
2368 if (im->gridfit)
2369 apply_gridfit(im);
2372 /**************************************************************
2373 *** Calculating sizes and locations became a bit confusing ***
2374 *** so I moved this into a separate function. ***
2375 **************************************************************/
2376 if(graph_size_location(im,i
2377 #ifdef WITH_PIECHART
2378 ,piechart
2379 #endif
2380 )==-1)
2381 return -1;
2383 /* the actual graph is created by going through the individual
2384 graph elements and then drawing them */
2386 node=gfx_new_area ( im->canvas,
2387 0, 0,
2388 im->ximg, 0,
2389 im->ximg, im->yimg,
2390 im->graph_col[GRC_BACK]);
2392 gfx_add_point(node,0, im->yimg);
2394 #ifdef WITH_PIECHART
2395 if (piechart != 2) {
2396 #endif
2397 node=gfx_new_area ( im->canvas,
2398 im->xorigin, im->yorigin,
2399 im->xorigin + im->xsize, im->yorigin,
2400 im->xorigin + im->xsize, im->yorigin-im->ysize,
2401 im->graph_col[GRC_CANVAS]);
2403 gfx_add_point(node,im->xorigin, im->yorigin - im->ysize);
2405 if (im->minval > 0.0)
2406 areazero = im->minval;
2407 if (im->maxval < 0.0)
2408 areazero = im->maxval;
2409 #ifdef WITH_PIECHART
2410 }
2411 #endif
2413 #ifdef WITH_PIECHART
2414 if (piechart) {
2415 pie_part(im,im->graph_col[GRC_CANVAS],im->pie_x,im->pie_y,im->piesize*0.5,0,2*M_PI);
2416 }
2417 #endif
2419 for(i=0;i<im->gdes_c;i++){
2420 switch(im->gdes[i].gf){
2421 case GF_CDEF:
2422 case GF_VDEF:
2423 case GF_DEF:
2424 case GF_PRINT:
2425 case GF_GPRINT:
2426 case GF_COMMENT:
2427 case GF_HRULE:
2428 case GF_VRULE:
2429 case GF_XPORT:
2430 case GF_SHIFT:
2431 break;
2432 case GF_TICK:
2433 for (ii = 0; ii < im->xsize; ii++)
2434 {
2435 if (!isnan(im->gdes[i].p_data[ii]) &&
2436 im->gdes[i].p_data[ii] > 0.0)
2437 {
2438 /* generate a tick */
2439 gfx_new_line(im->canvas, im -> xorigin + ii,
2440 im -> yorigin - (im -> gdes[i].yrule * im -> ysize),
2441 im -> xorigin + ii,
2442 im -> yorigin,
2443 1.0,
2444 im -> gdes[i].col );
2445 }
2446 }
2447 break;
2448 case GF_LINE:
2449 case GF_AREA:
2450 stack_gf = im->gdes[i].gf;
2451 case GF_STACK:
2452 /* fix data points at oo and -oo */
2453 for(ii=0;ii<im->xsize;ii++){
2454 if (isinf(im->gdes[i].p_data[ii])){
2455 if (im->gdes[i].p_data[ii] > 0) {
2456 im->gdes[i].p_data[ii] = im->maxval ;
2457 } else {
2458 im->gdes[i].p_data[ii] = im->minval ;
2459 }
2461 }
2462 } /* for */
2464 /* *******************************************************
2465 a ___. (a,t)
2466 | | ___
2467 ____| | | |
2468 | |___|
2469 -------|--t-1--t--------------------------------
2471 if we know the value at time t was a then
2472 we draw a square from t-1 to t with the value a.
2474 ********************************************************* */
2475 if (im->gdes[i].col != 0x0){
2476 /* GF_LINE and friend */
2477 if(stack_gf == GF_LINE ){
2478 node = NULL;
2479 for(ii=1;ii<im->xsize;ii++){
2480 if (isnan(im->gdes[i].p_data[ii]) || (im->slopemode==1 && isnan(im->gdes[i].p_data[ii-1]))){
2481 node = NULL;
2482 continue;
2483 }
2484 if ( node == NULL ) {
2485 if ( im->slopemode == 0 ){
2486 node = gfx_new_line(im->canvas,
2487 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii]),
2488 ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]),
2489 im->gdes[i].linewidth,
2490 im->gdes[i].col);
2491 } else {
2492 node = gfx_new_line(im->canvas,
2493 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii-1]),
2494 ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]),
2495 im->gdes[i].linewidth,
2496 im->gdes[i].col);
2497 }
2498 } else {
2499 if ( im->slopemode==0 ){
2500 gfx_add_point(node,ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii]));
2501 };
2502 gfx_add_point(node,ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]));
2503 };
2505 }
2506 } else {
2507 float ybase0 = DNAN,ytop0=DNAN;
2508 for(ii=0;ii<im->xsize;ii++){
2509 /* keep things simple for now, just draw these bars
2510 do not try to build a big and complex area */
2511 float ybase,ytop;
2512 if ( im->slopemode == 0 && ii==0){
2513 continue;
2514 }
2515 if ( isnan(im->gdes[i].p_data[ii]) ) {
2516 ybase0 = DNAN;
2517 continue;
2518 }
2519 ytop = ytr(im,im->gdes[i].p_data[ii]);
2520 if ( lastgdes && im->gdes[i].stack ) {
2521 ybase = ytr(im,lastgdes->p_data[ii]);
2522 } else {
2523 ybase = ytr(im,areazero);
2524 }
2525 if ( ybase == ytop ){
2526 ybase0 = DNAN;
2527 continue;
2528 }
2529 /* every area has to be wound clock-wise,
2530 so we have to make sur base remains base */
2531 if (ybase > ytop){
2532 float extra = ytop;
2533 ytop = ybase;
2534 ybase = extra;
2535 }
2536 if ( im->slopemode == 0){
2537 ybase0 = ybase;
2538 ytop0 = ytop;
2539 }
2540 if ( !isnan(ybase0) ){
2541 node = gfx_new_area(im->canvas,
2542 ii-1+im->xorigin,ybase0,
2543 ii-1+im->xorigin,ytop0,
2544 ii+im->xorigin,ytop,
2545 im->gdes[i].col
2546 );
2547 gfx_add_point(node,
2548 ii+im->xorigin,ybase
2549 );
2550 }
2551 ybase0=ybase;
2552 ytop0=ytop;
2553 }
2554 } /* else GF_LINE */
2555 } /* if color != 0x0 */
2556 /* make sure we do not run into trouble when stacking on NaN */
2557 for(ii=0;ii<im->xsize;ii++){
2558 if (isnan(im->gdes[i].p_data[ii])) {
2559 if (lastgdes && (im->gdes[i].stack)) {
2560 im->gdes[i].p_data[ii] = lastgdes->p_data[ii];
2561 } else {
2562 im->gdes[i].p_data[ii] = ytr(im,areazero);
2563 }
2564 }
2565 }
2566 lastgdes = &(im->gdes[i]);
2567 break;
2568 #ifdef WITH_PIECHART
2569 case GF_PART:
2570 if(isnan(im->gdes[i].yrule)) /* fetch variable */
2571 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2573 if (finite(im->gdes[i].yrule)) { /* even the fetched var can be NaN */
2574 pie_part(im,im->gdes[i].col,
2575 im->pie_x,im->pie_y,im->piesize*0.4,
2576 M_PI*2.0*PieStart/100.0,
2577 M_PI*2.0*(PieStart+im->gdes[i].yrule)/100.0);
2578 PieStart += im->gdes[i].yrule;
2579 }
2580 break;
2581 #endif
2583 } /* switch */
2584 }
2585 #ifdef WITH_PIECHART
2586 if (piechart==2) {
2587 im->draw_x_grid=0;
2588 im->draw_y_grid=0;
2589 }
2590 #endif
2593 /* grid_paint also does the text */
2594 if( !(im->extra_flags & ONLY_GRAPH) )
2595 grid_paint(im);
2598 if( !(im->extra_flags & ONLY_GRAPH) )
2599 axis_paint(im);
2601 /* the RULES are the last thing to paint ... */
2602 for(i=0;i<im->gdes_c;i++){
2604 switch(im->gdes[i].gf){
2605 case GF_HRULE:
2606 if(isnan(im->gdes[i].yrule)) { /* fetch variable */
2607 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2608 };
2609 if(im->gdes[i].yrule >= im->minval
2610 && im->gdes[i].yrule <= im->maxval)
2611 gfx_new_line(im->canvas,
2612 im->xorigin,ytr(im,im->gdes[i].yrule),
2613 im->xorigin+im->xsize,ytr(im,im->gdes[i].yrule),
2614 1.0,im->gdes[i].col);
2615 break;
2616 case GF_VRULE:
2617 if(im->gdes[i].xrule == 0) { /* fetch variable */
2618 im->gdes[i].xrule = im->gdes[im->gdes[i].vidx].vf.when;
2619 };
2620 if(im->gdes[i].xrule >= im->start
2621 && im->gdes[i].xrule <= im->end)
2622 gfx_new_line(im->canvas,
2623 xtr(im,im->gdes[i].xrule),im->yorigin,
2624 xtr(im,im->gdes[i].xrule),im->yorigin-im->ysize,
2625 1.0,im->gdes[i].col);
2626 break;
2627 default:
2628 break;
2629 }
2630 }
2633 if (strcmp(im->graphfile,"-")==0) {
2634 fo = im->graphhandle ? im->graphhandle : stdout;
2635 #if defined(WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
2636 /* Change translation mode for stdout to BINARY */
2637 _setmode( _fileno( fo ), O_BINARY );
2638 #endif
2639 } else {
2640 if ((fo = fopen(im->graphfile,"wb")) == NULL) {
2641 rrd_set_error("Opening '%s' for write: %s",im->graphfile,
2642 rrd_strerror(errno));
2643 return (-1);
2644 }
2645 }
2646 gfx_render (im->canvas,im->ximg,im->yimg,0x0,fo);
2647 if (strcmp(im->graphfile,"-") != 0)
2648 fclose(fo);
2649 return 0;
2650 }
2653 /*****************************************************
2654 * graph stuff
2655 *****************************************************/
2657 int
2658 gdes_alloc(image_desc_t *im){
2660 im->gdes_c++;
2661 if ((im->gdes = (graph_desc_t *) rrd_realloc(im->gdes, (im->gdes_c)
2662 * sizeof(graph_desc_t)))==NULL){
2663 rrd_set_error("realloc graph_descs");
2664 return -1;
2665 }
2668 im->gdes[im->gdes_c-1].step=im->step;
2669 im->gdes[im->gdes_c-1].stack=0;
2670 im->gdes[im->gdes_c-1].debug=0;
2671 im->gdes[im->gdes_c-1].start=im->start;
2672 im->gdes[im->gdes_c-1].end=im->end;
2673 im->gdes[im->gdes_c-1].vname[0]='\0';
2674 im->gdes[im->gdes_c-1].data=NULL;
2675 im->gdes[im->gdes_c-1].ds_namv=NULL;
2676 im->gdes[im->gdes_c-1].data_first=0;
2677 im->gdes[im->gdes_c-1].p_data=NULL;
2678 im->gdes[im->gdes_c-1].rpnp=NULL;
2679 im->gdes[im->gdes_c-1].shift=0;
2680 im->gdes[im->gdes_c-1].col = 0x0;
2681 im->gdes[im->gdes_c-1].legend[0]='\0';
2682 im->gdes[im->gdes_c-1].format[0]='\0';
2683 im->gdes[im->gdes_c-1].rrd[0]='\0';
2684 im->gdes[im->gdes_c-1].ds=-1;
2685 im->gdes[im->gdes_c-1].p_data=NULL;
2686 im->gdes[im->gdes_c-1].yrule=DNAN;
2687 im->gdes[im->gdes_c-1].xrule=0;
2688 return 0;
2689 }
2691 /* copies input untill the first unescaped colon is found
2692 or until input ends. backslashes have to be escaped as well */
2693 int
2694 scan_for_col(char *input, int len, char *output)
2695 {
2696 int inp,outp=0;
2697 for (inp=0;
2698 inp < len &&
2699 input[inp] != ':' &&
2700 input[inp] != '\0';
2701 inp++){
2702 if (input[inp] == '\\' &&
2703 input[inp+1] != '\0' &&
2704 (input[inp+1] == '\\' ||
2705 input[inp+1] == ':')){
2706 output[outp++] = input[++inp];
2707 }
2708 else {
2709 output[outp++] = input[inp];
2710 }
2711 }
2712 output[outp] = '\0';
2713 return inp;
2714 }
2715 /* Some surgery done on this function, it became ridiculously big.
2716 ** Things moved:
2717 ** - initializing now in rrd_graph_init()
2718 ** - options parsing now in rrd_graph_options()
2719 ** - script parsing now in rrd_graph_script()
2720 */
2721 int
2722 rrd_graph(int argc, char **argv, char ***prdata, int *xsize, int *ysize, FILE *stream, double *ymin, double *ymax)
2723 {
2724 image_desc_t im;
2725 rrd_graph_init(&im);
2726 im.graphhandle = stream;
2728 rrd_graph_options(argc,argv,&im);
2729 if (rrd_test_error()) {
2730 im_free(&im);
2731 return -1;
2732 }
2734 if (strlen(argv[optind])>=MAXPATH) {
2735 rrd_set_error("filename (including path) too long");
2736 im_free(&im);
2737 return -1;
2738 }
2739 strncpy(im.graphfile,argv[optind],MAXPATH-1);
2740 im.graphfile[MAXPATH-1]='\0';
2742 rrd_graph_script(argc,argv,&im,1);
2743 if (rrd_test_error()) {
2744 im_free(&im);
2745 return -1;
2746 }
2748 /* Everything is now read and the actual work can start */
2750 (*prdata)=NULL;
2751 if (graph_paint(&im,prdata)==-1){
2752 im_free(&im);
2753 return -1;
2754 }
2756 /* The image is generated and needs to be output.
2757 ** Also, if needed, print a line with information about the image.
2758 */
2760 *xsize=im.ximg;
2761 *ysize=im.yimg;
2762 *ymin=im.minval;
2763 *ymax=im.maxval;
2764 if (im.imginfo) {
2765 char *filename;
2766 if (!(*prdata)) {
2767 /* maybe prdata is not allocated yet ... lets do it now */
2768 if ((*prdata = calloc(2,sizeof(char *)))==NULL) {
2769 rrd_set_error("malloc imginfo");
2770 return -1;
2771 };
2772 }
2773 if(((*prdata)[0] = malloc((strlen(im.imginfo)+200+strlen(im.graphfile))*sizeof(char)))
2774 ==NULL){
2775 rrd_set_error("malloc imginfo");
2776 return -1;
2777 }
2778 filename=im.graphfile+strlen(im.graphfile);
2779 while(filename > im.graphfile) {
2780 if (*(filename-1)=='/' || *(filename-1)=='\\' ) break;
2781 filename--;
2782 }
2784 sprintf((*prdata)[0],im.imginfo,filename,(long)(im.canvas->zoom*im.ximg),(long)(im.canvas->zoom*im.yimg));
2785 }
2786 im_free(&im);
2787 return 0;
2788 }
2790 void
2791 rrd_graph_init(image_desc_t *im)
2792 {
2793 unsigned int i;
2795 #ifdef HAVE_TZSET
2796 tzset();
2797 #endif
2798 #ifdef HAVE_SETLOCALE
2799 setlocale(LC_TIME,"");
2800 #endif
2801 im->yorigin=0;
2802 im->xorigin=0;
2803 im->minval=0;
2804 im->xlab_user.minsec = -1;
2805 im->ximg=0;
2806 im->yimg=0;
2807 im->xsize = 400;
2808 im->ysize = 100;
2809 im->step = 0;
2810 im->ylegend[0] = '\0';
2811 im->title[0] = '\0';
2812 im->minval = DNAN;
2813 im->maxval = DNAN;
2814 im->unitsexponent= 9999;
2815 im->unitslength= 6;
2816 im->symbol = ' ';
2817 im->viewfactor = 1.0;
2818 im->extra_flags= 0;
2819 im->rigid = 0;
2820 im->gridfit = 1;
2821 im->imginfo = NULL;
2822 im->lazy = 0;
2823 im->slopemode = 0;
2824 im->logarithmic = 0;
2825 im->ygridstep = DNAN;
2826 im->draw_x_grid = 1;
2827 im->draw_y_grid = 1;
2828 im->base = 1000;
2829 im->prt_c = 0;
2830 im->gdes_c = 0;
2831 im->gdes = NULL;
2832 im->canvas = gfx_new_canvas();
2833 im->grid_dash_on = 1;
2834 im->grid_dash_off = 1;
2835 im->tabwidth = 40.0;
2837 for(i=0;i<DIM(graph_col);i++)
2838 im->graph_col[i]=graph_col[i];
2840 #if defined(WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
2841 {
2842 char *windir;
2843 char rrd_win_default_font[1000];
2844 windir = getenv("windir");
2845 /* %windir% is something like D:\windows or C:\winnt */
2846 if (windir != NULL) {
2847 strncpy(rrd_win_default_font,windir,999);
2848 rrd_win_default_font[999] = '\0';
2849 strcat(rrd_win_default_font,"\\fonts\\");
2850 strcat(rrd_win_default_font,RRD_DEFAULT_FONT);
2851 for(i=0;i<DIM(text_prop);i++){
2852 strncpy(text_prop[i].font,rrd_win_default_font,sizeof(text_prop[i].font)-1);
2853 text_prop[i].font[sizeof(text_prop[i].font)-1] = '\0';
2854 }
2855 }
2856 }
2857 #endif
2858 {
2859 char *deffont;
2860 deffont = getenv("RRD_DEFAULT_FONT");
2861 if (deffont != NULL) {
2862 for(i=0;i<DIM(text_prop);i++){
2863 strncpy(text_prop[i].font,deffont,sizeof(text_prop[i].font)-1);
2864 text_prop[i].font[sizeof(text_prop[i].font)-1] = '\0';
2865 }
2866 }
2867 }
2868 for(i=0;i<DIM(text_prop);i++){
2869 im->text_prop[i].size = text_prop[i].size;
2870 strcpy(im->text_prop[i].font,text_prop[i].font);
2871 }
2872 }
2874 void
2875 rrd_graph_options(int argc, char *argv[],image_desc_t *im)
2876 {
2877 int stroff;
2878 char *parsetime_error = NULL;
2879 char scan_gtm[12],scan_mtm[12],scan_ltm[12],col_nam[12];
2880 time_t start_tmp=0,end_tmp=0;
2881 long long_tmp;
2882 struct rrd_time_value start_tv, end_tv;
2883 gfx_color_t color;
2884 optind = 0; opterr = 0; /* initialize getopt */
2886 parsetime("end-24h", &start_tv);
2887 parsetime("now", &end_tv);
2889 while (1){
2890 static struct option long_options[] =
2891 {
2892 {"start", required_argument, 0, 's'},
2893 {"end", required_argument, 0, 'e'},
2894 {"x-grid", required_argument, 0, 'x'},
2895 {"y-grid", required_argument, 0, 'y'},
2896 {"vertical-label",required_argument,0,'v'},
2897 {"width", required_argument, 0, 'w'},
2898 {"height", required_argument, 0, 'h'},
2899 {"interlaced", no_argument, 0, 'i'},
2900 {"upper-limit",required_argument, 0, 'u'},
2901 {"lower-limit",required_argument, 0, 'l'},
2902 {"rigid", no_argument, 0, 'r'},
2903 {"base", required_argument, 0, 'b'},
2904 {"logarithmic",no_argument, 0, 'o'},
2905 {"color", required_argument, 0, 'c'},
2906 {"font", required_argument, 0, 'n'},
2907 {"title", required_argument, 0, 't'},
2908 {"imginfo", required_argument, 0, 'f'},
2909 {"imgformat", required_argument, 0, 'a'},
2910 {"lazy", no_argument, 0, 'z'},
2911 {"zoom", required_argument, 0, 'm'},
2912 {"no-legend", no_argument, 0, 'g'},
2913 {"force-rules-legend",no_argument,0, 'F'},
2914 {"only-graph", no_argument, 0, 'j'},
2915 {"alt-y-grid", no_argument, 0, 'Y'},
2916 {"no-minor", no_argument, 0, 'I'},
2917 {"slope-mode", no_argument, 0, 'E'},
2918 {"alt-autoscale", no_argument, 0, 'A'},
2919 {"alt-autoscale-max", no_argument, 0, 'M'},
2920 {"no-gridfit", no_argument, 0, 'N'},
2921 {"units-exponent",required_argument, 0, 'X'},
2922 {"units-length",required_argument, 0, 'L'},
2923 {"step", required_argument, 0, 'S'},
2924 {"tabwidth", required_argument, 0, 'T'},
2925 {"font-render-mode", required_argument, 0, 'R'},
2926 {"font-smoothing-threshold", required_argument, 0, 'B'},
2927 {0,0,0,0}};
2928 int option_index = 0;
2929 int opt;
2930 int col_start,col_end;
2932 opt = getopt_long(argc, argv,
2933 "s:e:x:y:v:w:h:iu:l:rb:oc:n:m:t:f:a:I:zgjFYAMEX:L:S:T:NR:B:",
2934 long_options, &option_index);
2936 if (opt == EOF)
2937 break;
2939 switch(opt) {
2940 case 'I':
2941 im->extra_flags |= NOMINOR;
2942 break;
2943 case 'Y':
2944 im->extra_flags |= ALTYGRID;
2945 break;
2946 case 'A':
2947 im->extra_flags |= ALTAUTOSCALE;
2948 break;
2949 case 'M':
2950 im->extra_flags |= ALTAUTOSCALE_MAX;
2951 break;
2952 case 'j':
2953 im->extra_flags |= ONLY_GRAPH;
2954 break;
2955 case 'g':
2956 im->extra_flags |= NOLEGEND;
2957 break;
2958 case 'F':
2959 im->extra_flags |= FORCE_RULES_LEGEND;
2960 break;
2961 case 'X':
2962 im->unitsexponent = atoi(optarg);
2963 break;
2964 case 'L':
2965 im->unitslength = atoi(optarg);
2966 break;
2967 case 'T':
2968 im->tabwidth = atof(optarg);
2969 break;
2970 case 'S':
2971 im->step = atoi(optarg);
2972 break;
2973 case 'N':
2974 im->gridfit = 0;
2975 break;
2976 case 's':
2977 if ((parsetime_error = parsetime(optarg, &start_tv))) {
2978 rrd_set_error( "start time: %s", parsetime_error );
2979 return;
2980 }
2981 break;
2982 case 'e':
2983 if ((parsetime_error = parsetime(optarg, &end_tv))) {
2984 rrd_set_error( "end time: %s", parsetime_error );
2985 return;
2986 }
2987 break;
2988 case 'x':
2989 if(strcmp(optarg,"none") == 0){
2990 im->draw_x_grid=0;
2991 break;
2992 };
2994 if(sscanf(optarg,
2995 "%10[A-Z]:%ld:%10[A-Z]:%ld:%10[A-Z]:%ld:%ld:%n",
2996 scan_gtm,
2997 &im->xlab_user.gridst,
2998 scan_mtm,
2999 &im->xlab_user.mgridst,
3000 scan_ltm,
3001 &im->xlab_user.labst,
3002 &im->xlab_user.precis,
3003 &stroff) == 7 && stroff != 0){
3004 strncpy(im->xlab_form, optarg+stroff, sizeof(im->xlab_form) - 1);
3005 im->xlab_form[sizeof(im->xlab_form)-1] = '\0';
3006 if((int)(im->xlab_user.gridtm = tmt_conv(scan_gtm)) == -1){
3007 rrd_set_error("unknown keyword %s",scan_gtm);
3008 return;
3009 } else if ((int)(im->xlab_user.mgridtm = tmt_conv(scan_mtm)) == -1){
3010 rrd_set_error("unknown keyword %s",scan_mtm);
3011 return;
3012 } else if ((int)(im->xlab_user.labtm = tmt_conv(scan_ltm)) == -1){
3013 rrd_set_error("unknown keyword %s",scan_ltm);
3014 return;
3015 }
3016 im->xlab_user.minsec = 1;
3017 im->xlab_user.stst = im->xlab_form;
3018 } else {
3019 rrd_set_error("invalid x-grid format");
3020 return;
3021 }
3022 break;
3023 case 'y':
3025 if(strcmp(optarg,"none") == 0){
3026 im->draw_y_grid=0;
3027 break;
3028 };
3030 if(sscanf(optarg,
3031 "%lf:%d",
3032 &im->ygridstep,
3033 &im->ylabfact) == 2) {
3034 if(im->ygridstep<=0){
3035 rrd_set_error("grid step must be > 0");
3036 return;
3037 } else if (im->ylabfact < 1){
3038 rrd_set_error("label factor must be > 0");
3039 return;
3040 }
3041 } else {
3042 rrd_set_error("invalid y-grid format");
3043 return;
3044 }
3045 break;
3046 case 'v':
3047 strncpy(im->ylegend,optarg,150);
3048 im->ylegend[150]='\0';
3049 break;
3050 case 'u':
3051 im->maxval = atof(optarg);
3052 break;
3053 case 'l':
3054 im->minval = atof(optarg);
3055 break;
3056 case 'b':
3057 im->base = atol(optarg);
3058 if(im->base != 1024 && im->base != 1000 ){
3059 rrd_set_error("the only sensible value for base apart from 1000 is 1024");
3060 return;
3061 }
3062 break;
3063 case 'w':
3064 long_tmp = atol(optarg);
3065 if (long_tmp < 10) {
3066 rrd_set_error("width below 10 pixels");
3067 return;
3068 }
3069 im->xsize = long_tmp;
3070 break;
3071 case 'h':
3072 long_tmp = atol(optarg);
3073 if (long_tmp < 10) {
3074 rrd_set_error("height below 10 pixels");
3075 return;
3076 }
3077 im->ysize = long_tmp;
3078 break;
3079 case 'i':
3080 im->canvas->interlaced = 1;
3081 break;
3082 case 'r':
3083 im->rigid = 1;
3084 break;
3085 case 'f':
3086 im->imginfo = optarg;
3087 break;
3088 case 'a':
3089 if((int)(im->canvas->imgformat = if_conv(optarg)) == -1) {
3090 rrd_set_error("unsupported graphics format '%s'",optarg);
3091 return;
3092 }
3093 break;
3094 case 'z':
3095 im->lazy = 1;
3096 break;
3097 case 'E':
3098 im->slopemode = 1;
3099 break;
3101 case 'o':
3102 im->logarithmic = 1;
3103 if (isnan(im->minval))
3104 im->minval=1;
3105 break;
3106 case 'c':
3107 if(sscanf(optarg,
3108 "%10[A-Z]#%n%8lx%n",
3109 col_nam,&col_start,&color,&col_end) == 2){
3110 int ci;
3111 int col_len = col_end - col_start;
3112 switch (col_len){
3113 case 6:
3114 color = (color << 8) + 0xff /* shift left by 8 */;
3115 break;
3116 case 8:
3117 break;
3118 default:
3119 rrd_set_error("the color format is #RRGGBB[AA]");
3120 return;
3121 }
3122 if((ci=grc_conv(col_nam)) != -1){
3123 im->graph_col[ci]=color;
3124 } else {
3125 rrd_set_error("invalid color name '%s'",col_nam);
3126 return;
3127 }
3128 } else {
3129 rrd_set_error("invalid color def format");
3130 return;
3131 }
3132 break;
3133 case 'n':{
3134 char prop[15];
3135 double size = 1;
3136 char font[1024];
3138 if(sscanf(optarg,
3139 "%10[A-Z]:%lf:%1000s",
3140 prop,&size,font) == 3){
3141 int sindex;
3142 if((sindex=text_prop_conv(prop)) != -1){
3143 im->text_prop[sindex].size=size;
3144 strcpy(im->text_prop[sindex].font,font);
3145 if (sindex==0) { /* the default */
3146 im->text_prop[TEXT_PROP_TITLE].size=size;
3147 strcpy(im->text_prop[TEXT_PROP_TITLE].font,font);
3148 im->text_prop[TEXT_PROP_AXIS].size=size;
3149 strcpy(im->text_prop[TEXT_PROP_AXIS].font,font);
3150 im->text_prop[TEXT_PROP_UNIT].size=size;
3151 strcpy(im->text_prop[TEXT_PROP_UNIT].font,font);
3152 im->text_prop[TEXT_PROP_LEGEND].size=size;
3153 strcpy(im->text_prop[TEXT_PROP_LEGEND].font,font);
3154 }
3155 } else {
3156 rrd_set_error("invalid fonttag '%s'",prop);
3157 return;
3158 }
3159 } else {
3160 rrd_set_error("invalid text property format");
3161 return;
3162 }
3163 break;
3164 }
3165 case 'm':
3166 im->canvas->zoom = atof(optarg);
3167 if (im->canvas->zoom <= 0.0) {
3168 rrd_set_error("zoom factor must be > 0");
3169 return;
3170 }
3171 break;
3172 case 't':
3173 strncpy(im->title,optarg,150);
3174 im->title[150]='\0';
3175 break;
3177 case 'R':
3178 if ( strcmp( optarg, "normal" ) == 0 )
3179 im->canvas->aa_type = AA_NORMAL;
3180 else if ( strcmp( optarg, "light" ) == 0 )
3181 im->canvas->aa_type = AA_LIGHT;
3182 else if ( strcmp( optarg, "mono" ) == 0 )
3183 im->canvas->aa_type = AA_NONE;
3184 else
3185 {
3186 rrd_set_error("unknown font-render-mode '%s'", optarg );
3187 return;
3188 }
3189 break;
3191 case 'B':
3192 im->canvas->font_aa_threshold = atof(optarg);
3193 break;
3195 case '?':
3196 if (optopt != 0)
3197 rrd_set_error("unknown option '%c'", optopt);
3198 else
3199 rrd_set_error("unknown option '%s'",argv[optind-1]);
3200 return;
3201 }
3202 }
3204 if (optind >= argc) {
3205 rrd_set_error("missing filename");
3206 return;
3207 }
3209 if (im->logarithmic == 1 && (im->minval <= 0 || isnan(im->minval))){
3210 rrd_set_error("for a logarithmic yaxis you must specify a lower-limit > 0");
3211 return;
3212 }
3214 if (proc_start_end(&start_tv,&end_tv,&start_tmp,&end_tmp) == -1){
3215 /* error string is set in parsetime.c */
3216 return;
3217 }
3219 if (start_tmp < 3600*24*365*10){
3220 rrd_set_error("the first entry to fetch should be after 1980 (%ld)",start_tmp);
3221 return;
3222 }
3224 if (end_tmp < start_tmp) {
3225 rrd_set_error("start (%ld) should be less than end (%ld)",
3226 start_tmp, end_tmp);
3227 return;
3228 }
3230 im->start = start_tmp;
3231 im->end = end_tmp;
3232 im->step = max((long)im->step, (im->end-im->start)/im->xsize);
3233 }
3235 int
3236 rrd_graph_check_vname(image_desc_t *im, char *varname, char *err)
3237 {
3238 if ((im->gdes[im->gdes_c-1].vidx=find_var(im,varname))==-1) {
3239 rrd_set_error("Unknown variable '%s' in %s",varname,err);
3240 return -1;
3241 }
3242 return 0;
3243 }
3244 int
3245 rrd_graph_color(image_desc_t *im, char *var, char *err, int optional)
3246 {
3247 char *color;
3248 graph_desc_t *gdp=&im->gdes[im->gdes_c-1];
3250 color=strstr(var,"#");
3251 if (color==NULL) {
3252 if (optional==0) {
3253 rrd_set_error("Found no color in %s",err);
3254 return 0;
3255 }
3256 return 0;
3257 } else {
3258 int n=0;
3259 char *rest;
3260 gfx_color_t col;
3262 rest=strstr(color,":");
3263 if (rest!=NULL)
3264 n=rest-color;
3265 else
3266 n=strlen(color);
3268 switch (n) {
3269 case 7:
3270 sscanf(color,"#%6lx%n",&col,&n);
3271 col = (col << 8) + 0xff /* shift left by 8 */;
3272 if (n!=7) rrd_set_error("Color problem in %s",err);
3273 break;
3274 case 9:
3275 sscanf(color,"#%8lx%n",&col,&n);
3276 if (n==9) break;
3277 default:
3278 rrd_set_error("Color problem in %s",err);
3279 }
3280 if (rrd_test_error()) return 0;
3281 gdp->col = col;
3282 return n;
3283 }
3284 }
3287 int bad_format(char *fmt) {
3288 char *ptr;
3289 int n=0;
3290 ptr = fmt;
3291 while (*ptr != '\0')
3292 if (*ptr++ == '%') {
3294 /* line cannot end with percent char */
3295 if (*ptr == '\0') return 1;
3297 /* '%s', '%S' and '%%' are allowed */
3298 if (*ptr == 's' || *ptr == 'S' || *ptr == '%') ptr++;
3300 /* or else '% 6.2lf' and such are allowed */
3301 else {
3303 /* optional padding character */
3304 if (*ptr == ' ' || *ptr == '+' || *ptr == '-') ptr++;
3306 /* This should take care of 'm.n' with all three optional */
3307 while (*ptr >= '0' && *ptr <= '9') ptr++;
3308 if (*ptr == '.') ptr++;
3309 while (*ptr >= '0' && *ptr <= '9') ptr++;
3311 /* Either 'le', 'lf' or 'lg' must follow here */
3312 if (*ptr++ != 'l') return 1;
3313 if (*ptr == 'e' || *ptr == 'f' || *ptr == 'g') ptr++;
3314 else return 1;
3315 n++;
3316 }
3317 }
3319 return (n!=1);
3320 }
3323 int
3324 vdef_parse(gdes,str)
3325 struct graph_desc_t *gdes;
3326 char *str;
3327 {
3328 /* A VDEF currently is either "func" or "param,func"
3329 * so the parsing is rather simple. Change if needed.
3330 */
3331 double param;
3332 char func[30];
3333 int n;
3335 n=0;
3336 sscanf(str,"%le,%29[A-Z]%n",¶m,func,&n);
3337 if (n== (int)strlen(str)) { /* matched */
3338 ;
3339 } else {
3340 n=0;
3341 sscanf(str,"%29[A-Z]%n",func,&n);
3342 if (n== (int)strlen(str)) { /* matched */
3343 param=DNAN;
3344 } else {
3345 rrd_set_error("Unknown function string '%s' in VDEF '%s'"
3346 ,str
3347 ,gdes->vname
3348 );
3349 return -1;
3350 }
3351 }
3352 if (!strcmp("PERCENT",func)) gdes->vf.op = VDEF_PERCENT;
3353 else if (!strcmp("MAXIMUM",func)) gdes->vf.op = VDEF_MAXIMUM;
3354 else if (!strcmp("AVERAGE",func)) gdes->vf.op = VDEF_AVERAGE;
3355 else if (!strcmp("MINIMUM",func)) gdes->vf.op = VDEF_MINIMUM;
3356 else if (!strcmp("TOTAL", func)) gdes->vf.op = VDEF_TOTAL;
3357 else if (!strcmp("FIRST", func)) gdes->vf.op = VDEF_FIRST;
3358 else if (!strcmp("LAST", func)) gdes->vf.op = VDEF_LAST;
3359 else {
3360 rrd_set_error("Unknown function '%s' in VDEF '%s'\n"
3361 ,func
3362 ,gdes->vname
3363 );
3364 return -1;
3365 };
3367 switch (gdes->vf.op) {
3368 case VDEF_PERCENT:
3369 if (isnan(param)) { /* no parameter given */
3370 rrd_set_error("Function '%s' needs parameter in VDEF '%s'\n"
3371 ,func
3372 ,gdes->vname
3373 );
3374 return -1;
3375 };
3376 if (param>=0.0 && param<=100.0) {
3377 gdes->vf.param = param;
3378 gdes->vf.val = DNAN; /* undefined */
3379 gdes->vf.when = 0; /* undefined */
3380 } else {
3381 rrd_set_error("Parameter '%f' out of range in VDEF '%s'\n"
3382 ,param
3383 ,gdes->vname
3384 );
3385 return -1;
3386 };
3387 break;
3388 case VDEF_MAXIMUM:
3389 case VDEF_AVERAGE:
3390 case VDEF_MINIMUM:
3391 case VDEF_TOTAL:
3392 case VDEF_FIRST:
3393 case VDEF_LAST:
3394 if (isnan(param)) {
3395 gdes->vf.param = DNAN;
3396 gdes->vf.val = DNAN;
3397 gdes->vf.when = 0;
3398 } else {
3399 rrd_set_error("Function '%s' needs no parameter in VDEF '%s'\n"
3400 ,func
3401 ,gdes->vname
3402 );
3403 return -1;
3404 };
3405 break;
3406 };
3407 return 0;
3408 }
3411 int
3412 vdef_calc(im,gdi)
3413 image_desc_t *im;
3414 int gdi;
3415 {
3416 graph_desc_t *src,*dst;
3417 rrd_value_t *data;
3418 long step,steps;
3420 dst = &im->gdes[gdi];
3421 src = &im->gdes[dst->vidx];
3422 data = src->data + src->ds;
3423 steps = (src->end - src->start) / src->step;
3425 #if 0
3426 printf("DEBUG: start == %lu, end == %lu, %lu steps\n"
3427 ,src->start
3428 ,src->end
3429 ,steps
3430 );
3431 #endif
3433 switch (dst->vf.op) {
3434 case VDEF_PERCENT: {
3435 rrd_value_t * array;
3436 int field;
3439 if ((array = malloc(steps*sizeof(double)))==NULL) {
3440 rrd_set_error("malloc VDEV_PERCENT");
3441 return -1;
3442 }
3443 for (step=0;step < steps; step++) {
3444 array[step]=data[step*src->ds_cnt];
3445 }
3446 qsort(array,step,sizeof(double),vdef_percent_compar);
3448 field = (steps-1)*dst->vf.param/100;
3449 dst->vf.val = array[field];
3450 dst->vf.when = 0; /* no time component */
3451 free(array);
3452 #if 0
3453 for(step=0;step<steps;step++)
3454 printf("DEBUG: %3li:%10.2f %c\n",step,array[step],step==field?'*':' ');
3455 #endif
3456 }
3457 break;
3458 case VDEF_MAXIMUM:
3459 step=0;
3460 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3461 if (step == steps) {
3462 dst->vf.val = DNAN;
3463 dst->vf.when = 0;
3464 } else {
3465 dst->vf.val = data[step*src->ds_cnt];
3466 dst->vf.when = src->start + (step+1)*src->step;
3467 }
3468 while (step != steps) {
3469 if (finite(data[step*src->ds_cnt])) {
3470 if (data[step*src->ds_cnt] > dst->vf.val) {
3471 dst->vf.val = data[step*src->ds_cnt];
3472 dst->vf.when = src->start + (step+1)*src->step;
3473 }
3474 }
3475 step++;
3476 }
3477 break;
3478 case VDEF_TOTAL:
3479 case VDEF_AVERAGE: {
3480 int cnt=0;
3481 double sum=0.0;
3482 for (step=0;step<steps;step++) {
3483 if (finite(data[step*src->ds_cnt])) {
3484 sum += data[step*src->ds_cnt];
3485 cnt ++;
3486 };
3487 }
3488 if (cnt) {
3489 if (dst->vf.op == VDEF_TOTAL) {
3490 dst->vf.val = sum*src->step;
3491 dst->vf.when = cnt*src->step; /* not really "when" */
3492 } else {
3493 dst->vf.val = sum/cnt;
3494 dst->vf.when = 0; /* no time component */
3495 };
3496 } else {
3497 dst->vf.val = DNAN;
3498 dst->vf.when = 0;
3499 }
3500 }
3501 break;
3502 case VDEF_MINIMUM:
3503 step=0;
3504 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3505 if (step == steps) {
3506 dst->vf.val = DNAN;
3507 dst->vf.when = 0;
3508 } else {
3509 dst->vf.val = data[step*src->ds_cnt];
3510 dst->vf.when = src->start + (step+1)*src->step;
3511 }
3512 while (step != steps) {
3513 if (finite(data[step*src->ds_cnt])) {
3514 if (data[step*src->ds_cnt] < dst->vf.val) {
3515 dst->vf.val = data[step*src->ds_cnt];
3516 dst->vf.when = src->start + (step+1)*src->step;
3517 }
3518 }
3519 step++;
3520 }
3521 break;
3522 case VDEF_FIRST:
3523 /* The time value returned here is one step before the
3524 * actual time value. This is the start of the first
3525 * non-NaN interval.
3526 */
3527 step=0;
3528 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3529 if (step == steps) { /* all entries were NaN */
3530 dst->vf.val = DNAN;
3531 dst->vf.when = 0;
3532 } else {
3533 dst->vf.val = data[step*src->ds_cnt];
3534 dst->vf.when = src->start + step*src->step;
3535 }
3536 break;
3537 case VDEF_LAST:
3538 /* The time value returned here is the
3539 * actual time value. This is the end of the last
3540 * non-NaN interval.
3541 */
3542 step=steps-1;
3543 while (step >= 0 && isnan(data[step*src->ds_cnt])) step--;
3544 if (step < 0) { /* all entries were NaN */
3545 dst->vf.val = DNAN;
3546 dst->vf.when = 0;
3547 } else {
3548 dst->vf.val = data[step*src->ds_cnt];
3549 dst->vf.when = src->start + (step+1)*src->step;
3550 }
3551 break;
3552 }
3553 return 0;
3554 }
3556 /* NaN < -INF < finite_values < INF */
3557 int
3558 vdef_percent_compar(a,b)
3559 const void *a,*b;
3560 {
3561 /* Equality is not returned; this doesn't hurt except
3562 * (maybe) for a little performance.
3563 */
3565 /* First catch NaN values. They are smallest */
3566 if (isnan( *(double *)a )) return -1;
3567 if (isnan( *(double *)b )) return 1;
3569 /* NaN doesn't reach this part so INF and -INF are extremes.
3570 * The sign from isinf() is compatible with the sign we return
3571 */
3572 if (isinf( *(double *)a )) return isinf( *(double *)a );
3573 if (isinf( *(double *)b )) return isinf( *(double *)b );
3575 /* If we reach this, both values must be finite */
3576 if ( *(double *)a < *(double *)b ) return -1; else return 1;
3577 }