a405a29fa728493f5617243bd77aa508f76ce053
1 /****************************************************************************
2 * RRDtool 1.1.x Copyright Tobias Oetiker, 1997 - 2002
3 ****************************************************************************
4 * rrd__graph.c make creates ne rrds
5 ****************************************************************************/
8 #include <sys/stat.h>
10 #include "rrd_tool.h"
12 #ifdef WIN32
13 #include <io.h>
14 #include <fcntl.h>
15 #endif
17 #ifdef HAVE_TIME_H
18 #include <time.h>
19 #endif
21 #ifdef HAVE_LOCALE_H
22 #include <locale.h>
23 #endif
25 #include "rrd_graph.h"
27 /* some constant definitions */
30 #ifndef RRD_DEFAULT_FONT
31 #ifdef WIN32
32 #define RRD_DEFAULT_FONT "c:/winnt/fonts/COUR.TTF"
33 #else
34 #define RRD_DEFAULT_FONT "/usr/share/fonts/truetype/openoffice/ariosor.ttf"
35 /* #define RRD_DEFAULT_FONT "/usr/share/fonts/truetype/Arial.ttf" */
36 #endif
37 #endif
40 text_prop_t text_prop[] = {
41 { 10.0, RRD_DEFAULT_FONT }, /* default */
42 { 12.0, RRD_DEFAULT_FONT }, /* title */
43 { 8.0, RRD_DEFAULT_FONT }, /* axis */
44 { 10.0, RRD_DEFAULT_FONT }, /* unit */
45 { 10.0, RRD_DEFAULT_FONT } /* legend */
46 };
48 xlab_t xlab[] = {
49 {0, TMT_SECOND,30, TMT_MINUTE,5, TMT_MINUTE,5, 0,"%H:%M"},
50 {2, TMT_MINUTE,1, TMT_MINUTE,5, TMT_MINUTE,5, 0,"%H:%M"},
51 {5, TMT_MINUTE,2, TMT_MINUTE,10, TMT_MINUTE,10, 0,"%H:%M"},
52 {10, TMT_MINUTE,5, TMT_MINUTE,20, TMT_MINUTE,20, 0,"%H:%M"},
53 {30, TMT_MINUTE,10, TMT_HOUR,1, TMT_HOUR,1, 0,"%H:%M"},
54 {60, TMT_MINUTE,30, TMT_HOUR,2, TMT_HOUR,2, 0,"%H:%M"},
55 {180, TMT_HOUR,1, TMT_HOUR,6, TMT_HOUR,6, 0,"%H:%M"},
56 /*{300, TMT_HOUR,3, TMT_HOUR,12, TMT_HOUR,12, 12*3600,"%a %p"}, this looks silly*/
57 {600, TMT_HOUR,6, TMT_DAY,1, TMT_DAY,1, 24*3600,"%a"},
58 {1800, TMT_HOUR,12, TMT_DAY,1, TMT_DAY,2, 24*3600,"%a"},
59 {3600, TMT_DAY,1, TMT_WEEK,1, TMT_WEEK,1, 7*24*3600,"Week %V"},
60 {3*3600, TMT_WEEK,1, TMT_MONTH,1, TMT_WEEK,2, 7*24*3600,"Week %V"},
61 {6*3600, TMT_MONTH,1, TMT_MONTH,1, TMT_MONTH,1, 30*24*3600,"%b"},
62 {48*3600, TMT_MONTH,1, TMT_MONTH,3, TMT_MONTH,3, 30*24*3600,"%b"},
63 {10*24*3600, TMT_YEAR,1, TMT_YEAR,1, TMT_YEAR,1, 365*24*3600,"%y"},
64 {-1,TMT_MONTH,0,TMT_MONTH,0,TMT_MONTH,0,0,""}
65 };
67 /* sensible logarithmic y label intervals ...
68 the first element of each row defines the possible starting points on the
69 y axis ... the other specify the */
71 double yloglab[][12]= {{ 1e9, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
72 { 1e3, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
73 { 1e1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
74 /* { 1e1, 1, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, */
75 { 1e1, 1, 2.5, 5, 7.5, 0, 0, 0, 0, 0, 0, 0 },
76 { 1e1, 1, 2, 4, 6, 8, 0, 0, 0, 0, 0, 0 },
77 { 1e1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0 },
78 { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }};
80 /* sensible y label intervals ...*/
82 ylab_t ylab[]= {
83 {0.1, {1,2, 5,10}},
84 {0.2, {1,5,10,20}},
85 {0.5, {1,2, 4,10}},
86 {1.0, {1,2, 5,10}},
87 {2.0, {1,5,10,20}},
88 {5.0, {1,2, 4,10}},
89 {10.0, {1,2, 5,10}},
90 {20.0, {1,5,10,20}},
91 {50.0, {1,2, 4,10}},
92 {100.0, {1,2, 5,10}},
93 {200.0, {1,5,10,20}},
94 {500.0, {1,2, 4,10}},
95 {0.0, {0,0,0,0}}};
98 gfx_color_t graph_col[] = /* default colors */
99 { 0xFFFFFFFF, /* canvas */
100 0xF0F0F0FF, /* background */
101 0xD0D0D0FF, /* shade A */
102 0xA0A0A0FF, /* shade B */
103 0x909090FF, /* grid */
104 0xE05050FF, /* major grid */
105 0x000000FF, /* font */
106 0x000000FF, /* frame */
107 0xFF0000FF /* arrow */
108 };
111 /* #define DEBUG */
113 #ifdef DEBUG
114 # define DPRINT(x) (void)(printf x, printf("\n"))
115 #else
116 # define DPRINT(x)
117 #endif
120 /* initialize with xtr(im,0); */
121 int
122 xtr(image_desc_t *im,time_t mytime){
123 static double pixie;
124 if (mytime==0){
125 pixie = (double) im->xsize / (double)(im->end - im->start);
126 return im->xorigin;
127 }
128 return (int)((double)im->xorigin
129 + pixie * ( mytime - im->start ) );
130 }
132 /* translate data values into y coordinates */
133 double
134 ytr(image_desc_t *im, double value){
135 static double pixie;
136 double yval;
137 if (isnan(value)){
138 if(!im->logarithmic)
139 pixie = (double) im->ysize / (im->maxval - im->minval);
140 else
141 pixie = (double) im->ysize / (log10(im->maxval) - log10(im->minval));
142 yval = im->yorigin;
143 } else if(!im->logarithmic) {
144 yval = im->yorigin - pixie * (value - im->minval);
145 } else {
146 if (value < im->minval) {
147 yval = im->yorigin;
148 } else {
149 yval = im->yorigin - pixie * (log10(value) - log10(im->minval));
150 }
151 }
152 /* make sure we don't return anything too unreasonable. GD lib can
153 get terribly slow when drawing lines outside its scope. This is
154 especially problematic in connection with the rigid option */
155 if (! im->rigid) {
156 /* keep yval as-is */
157 } else if (yval > im->yorigin) {
158 yval = im->yorigin+2;
159 } else if (yval < im->yorigin - im->ysize){
160 yval = im->yorigin - im->ysize - 2;
161 }
162 return yval;
163 }
167 /* conversion function for symbolic entry names */
170 #define conv_if(VV,VVV) \
171 if (strcmp(#VV, string) == 0) return VVV ;
173 enum gf_en gf_conv(char *string){
175 conv_if(PRINT,GF_PRINT)
176 conv_if(GPRINT,GF_GPRINT)
177 conv_if(COMMENT,GF_COMMENT)
178 conv_if(HRULE,GF_HRULE)
179 conv_if(VRULE,GF_VRULE)
180 conv_if(LINE,GF_LINE)
181 conv_if(AREA,GF_AREA)
182 conv_if(STACK,GF_STACK)
183 conv_if(TICK,GF_TICK)
184 conv_if(DEF,GF_DEF)
185 conv_if(CDEF,GF_CDEF)
186 conv_if(VDEF,GF_VDEF)
187 conv_if(PART,GF_PART)
188 conv_if(XPORT,GF_XPORT)
190 return (-1);
191 }
193 enum gfx_if_en if_conv(char *string){
195 conv_if(PNG,IF_PNG)
196 conv_if(SVG,IF_SVG)
197 conv_if(EPS,IF_EPS)
198 conv_if(PDF,IF_PDF)
200 return (-1);
201 }
203 enum tmt_en tmt_conv(char *string){
205 conv_if(SECOND,TMT_SECOND)
206 conv_if(MINUTE,TMT_MINUTE)
207 conv_if(HOUR,TMT_HOUR)
208 conv_if(DAY,TMT_DAY)
209 conv_if(WEEK,TMT_WEEK)
210 conv_if(MONTH,TMT_MONTH)
211 conv_if(YEAR,TMT_YEAR)
212 return (-1);
213 }
215 enum grc_en grc_conv(char *string){
217 conv_if(BACK,GRC_BACK)
218 conv_if(CANVAS,GRC_CANVAS)
219 conv_if(SHADEA,GRC_SHADEA)
220 conv_if(SHADEB,GRC_SHADEB)
221 conv_if(GRID,GRC_GRID)
222 conv_if(MGRID,GRC_MGRID)
223 conv_if(FONT,GRC_FONT)
224 conv_if(FRAME,GRC_FRAME)
225 conv_if(ARROW,GRC_ARROW)
227 return -1;
228 }
230 enum text_prop_en text_prop_conv(char *string){
232 conv_if(DEFAULT,TEXT_PROP_DEFAULT)
233 conv_if(TITLE,TEXT_PROP_TITLE)
234 conv_if(AXIS,TEXT_PROP_AXIS)
235 conv_if(UNIT,TEXT_PROP_UNIT)
236 conv_if(LEGEND,TEXT_PROP_LEGEND)
237 return -1;
238 }
241 #undef conv_if
243 int
244 im_free(image_desc_t *im)
245 {
246 unsigned long i,ii;
248 if (im == NULL) return 0;
249 for(i=0;i<(unsigned)im->gdes_c;i++){
250 if (im->gdes[i].data_first){
251 /* careful here, because a single pointer can occur several times */
252 free (im->gdes[i].data);
253 if (im->gdes[i].ds_namv){
254 for (ii=0;ii<im->gdes[i].ds_cnt;ii++)
255 free(im->gdes[i].ds_namv[ii]);
256 free(im->gdes[i].ds_namv);
257 }
258 }
259 free (im->gdes[i].p_data);
260 free (im->gdes[i].rpnp);
261 }
262 free(im->gdes);
263 gfx_destroy(im->canvas);
264 return 0;
265 }
267 /* find SI magnitude symbol for the given number*/
268 void
269 auto_scale(
270 image_desc_t *im, /* image description */
271 double *value,
272 char **symb_ptr,
273 double *magfact
274 )
275 {
277 char *symbol[] = {"a", /* 10e-18 Atto */
278 "f", /* 10e-15 Femto */
279 "p", /* 10e-12 Pico */
280 "n", /* 10e-9 Nano */
281 "u", /* 10e-6 Micro */
282 "m", /* 10e-3 Milli */
283 " ", /* Base */
284 "k", /* 10e3 Kilo */
285 "M", /* 10e6 Mega */
286 "G", /* 10e9 Giga */
287 "T", /* 10e12 Tera */
288 "P", /* 10e15 Peta */
289 "E"};/* 10e18 Exa */
291 int symbcenter = 6;
292 int sindex;
294 if (*value == 0.0 || isnan(*value) ) {
295 sindex = 0;
296 *magfact = 1.0;
297 } else {
298 sindex = floor(log(fabs(*value))/log((double)im->base));
299 *magfact = pow((double)im->base, (double)sindex);
300 (*value) /= (*magfact);
301 }
302 if ( sindex <= symbcenter && sindex >= -symbcenter) {
303 (*symb_ptr) = symbol[sindex+symbcenter];
304 }
305 else {
306 (*symb_ptr) = "?";
307 }
308 }
311 /* find SI magnitude symbol for the numbers on the y-axis*/
312 void
313 si_unit(
314 image_desc_t *im /* image description */
315 )
316 {
318 char symbol[] = {'a', /* 10e-18 Atto */
319 'f', /* 10e-15 Femto */
320 'p', /* 10e-12 Pico */
321 'n', /* 10e-9 Nano */
322 'u', /* 10e-6 Micro */
323 'm', /* 10e-3 Milli */
324 ' ', /* Base */
325 'k', /* 10e3 Kilo */
326 'M', /* 10e6 Mega */
327 'G', /* 10e9 Giga */
328 'T', /* 10e12 Tera */
329 'P', /* 10e15 Peta */
330 'E'};/* 10e18 Exa */
332 int symbcenter = 6;
333 double digits;
335 if (im->unitsexponent != 9999) {
336 /* unitsexponent = 9, 6, 3, 0, -3, -6, -9, etc */
337 digits = floor(im->unitsexponent / 3);
338 } else {
339 digits = floor( log( max( fabs(im->minval),fabs(im->maxval)))/log((double)im->base));
340 }
341 im->magfact = pow((double)im->base , digits);
343 #ifdef DEBUG
344 printf("digits %6.3f im->magfact %6.3f\n",digits,im->magfact);
345 #endif
347 if ( ((digits+symbcenter) < sizeof(symbol)) &&
348 ((digits+symbcenter) >= 0) )
349 im->symbol = symbol[(int)digits+symbcenter];
350 else
351 im->symbol = ' ';
352 }
354 /* move min and max values around to become sensible */
356 void
357 expand_range(image_desc_t *im)
358 {
359 double sensiblevalues[] ={1000.0,900.0,800.0,750.0,700.0,
360 600.0,500.0,400.0,300.0,250.0,
361 200.0,125.0,100.0,90.0,80.0,
362 75.0,70.0,60.0,50.0,40.0,30.0,
363 25.0,20.0,10.0,9.0,8.0,
364 7.0,6.0,5.0,4.0,3.5,3.0,
365 2.5,2.0,1.8,1.5,1.2,1.0,
366 0.8,0.7,0.6,0.5,0.4,0.3,0.2,0.1,0.0,-1};
368 double scaled_min,scaled_max;
369 double adj;
370 int i;
374 #ifdef DEBUG
375 printf("Min: %6.2f Max: %6.2f MagFactor: %6.2f\n",
376 im->minval,im->maxval,im->magfact);
377 #endif
379 if (isnan(im->ygridstep)){
380 if(im->extra_flags & ALTAUTOSCALE) {
381 /* measure the amplitude of the function. Make sure that
382 graph boundaries are slightly higher then max/min vals
383 so we can see amplitude on the graph */
384 double delt, fact;
386 delt = im->maxval - im->minval;
387 adj = delt * 0.1;
388 fact = 2.0 * pow(10.0,
389 floor(log10(max(fabs(im->minval), fabs(im->maxval)))) - 2);
390 if (delt < fact) {
391 adj = (fact - delt) * 0.55;
392 #ifdef DEBUG
393 printf("Min: %6.2f Max: %6.2f delt: %6.2f fact: %6.2f adj: %6.2f\n", im->minval, im->maxval, delt, fact, adj);
394 #endif
395 }
396 im->minval -= adj;
397 im->maxval += adj;
398 }
399 else if(im->extra_flags & ALTAUTOSCALE_MAX) {
400 /* measure the amplitude of the function. Make sure that
401 graph boundaries are slightly higher than max vals
402 so we can see amplitude on the graph */
403 adj = (im->maxval - im->minval) * 0.1;
404 im->maxval += adj;
405 }
406 else {
407 scaled_min = im->minval / im->magfact;
408 scaled_max = im->maxval / im->magfact;
410 for (i=1; sensiblevalues[i] > 0; i++){
411 if (sensiblevalues[i-1]>=scaled_min &&
412 sensiblevalues[i]<=scaled_min)
413 im->minval = sensiblevalues[i]*(im->magfact);
415 if (-sensiblevalues[i-1]<=scaled_min &&
416 -sensiblevalues[i]>=scaled_min)
417 im->minval = -sensiblevalues[i-1]*(im->magfact);
419 if (sensiblevalues[i-1] >= scaled_max &&
420 sensiblevalues[i] <= scaled_max)
421 im->maxval = sensiblevalues[i-1]*(im->magfact);
423 if (-sensiblevalues[i-1]<=scaled_max &&
424 -sensiblevalues[i] >=scaled_max)
425 im->maxval = -sensiblevalues[i]*(im->magfact);
426 }
427 }
428 } else {
429 /* adjust min and max to the grid definition if there is one */
430 im->minval = (double)im->ylabfact * im->ygridstep *
431 floor(im->minval / ((double)im->ylabfact * im->ygridstep));
432 im->maxval = (double)im->ylabfact * im->ygridstep *
433 ceil(im->maxval /( (double)im->ylabfact * im->ygridstep));
434 }
436 #ifdef DEBUG
437 fprintf(stderr,"SCALED Min: %6.2f Max: %6.2f Factor: %6.2f\n",
438 im->minval,im->maxval,im->magfact);
439 #endif
440 }
442 void
443 apply_gridfit(image_desc_t *im)
444 {
445 if (isnan(im->minval) || isnan(im->maxval))
446 return;
447 ytr(im,DNAN);
448 if (im->logarithmic) {
449 double ya, yb, ypix, ypixfrac;
450 double log10_range = log10(im->maxval) - log10(im->minval);
451 ya = pow((double)10, floor(log10(im->minval)));
452 while (ya < im->minval)
453 ya *= 10;
454 if (ya > im->maxval)
455 return; /* don't have y=10^x gridline */
456 yb = ya * 10;
457 if (yb <= im->maxval) {
458 /* we have at least 2 y=10^x gridlines.
459 Make sure distance between them in pixels
460 are an integer by expanding im->maxval */
461 double y_pixel_delta = ytr(im, ya) - ytr(im, yb);
462 double factor = y_pixel_delta / floor(y_pixel_delta);
463 double new_log10_range = factor * log10_range;
464 double new_ymax_log10 = log10(im->minval) + new_log10_range;
465 im->maxval = pow(10, new_ymax_log10);
466 ytr(im, DNAN); /* reset precalc */
467 log10_range = log10(im->maxval) - log10(im->minval);
468 }
469 /* make sure first y=10^x gridline is located on
470 integer pixel position by moving scale slightly
471 downwards (sub-pixel movement) */
472 ypix = ytr(im, ya) + im->ysize; /* add im->ysize so it always is positive */
473 ypixfrac = ypix - floor(ypix);
474 if (ypixfrac > 0 && ypixfrac < 1) {
475 double yfrac = ypixfrac / im->ysize;
476 im->minval = pow(10, log10(im->minval) - yfrac * log10_range);
477 im->maxval = pow(10, log10(im->maxval) - yfrac * log10_range);
478 ytr(im, DNAN); /* reset precalc */
479 }
480 } else {
481 /* Make sure we have an integer pixel distance between
482 each minor gridline */
483 double ypos1 = ytr(im, im->minval);
484 double ypos2 = ytr(im, im->minval + im->ygrid_scale.gridstep);
485 double y_pixel_delta = ypos1 - ypos2;
486 double factor = y_pixel_delta / floor(y_pixel_delta);
487 double new_range = factor * (im->maxval - im->minval);
488 double gridstep = im->ygrid_scale.gridstep;
489 double minor_y, minor_y_px, minor_y_px_frac;
490 im->maxval = im->minval + new_range;
491 ytr(im, DNAN); /* reset precalc */
492 /* make sure first minor gridline is on integer pixel y coord */
493 minor_y = gridstep * floor(im->minval / gridstep);
494 while (minor_y < im->minval)
495 minor_y += gridstep;
496 minor_y_px = ytr(im, minor_y) + im->ysize; /* ensure > 0 by adding ysize */
497 minor_y_px_frac = minor_y_px - floor(minor_y_px);
498 if (minor_y_px_frac > 0 && minor_y_px_frac < 1) {
499 double yfrac = minor_y_px_frac / im->ysize;
500 double range = im->maxval - im->minval;
501 im->minval = im->minval - yfrac * range;
502 im->maxval = im->maxval - yfrac * range;
503 ytr(im, DNAN); /* reset precalc */
504 }
505 calc_horizontal_grid(im); /* recalc with changed im->maxval */
506 }
507 }
509 /* reduce data reimplementation by Alex */
511 void
512 reduce_data(
513 enum cf_en cf, /* which consolidation function ?*/
514 unsigned long cur_step, /* step the data currently is in */
515 time_t *start, /* start, end and step as requested ... */
516 time_t *end, /* ... by the application will be ... */
517 unsigned long *step, /* ... adjusted to represent reality */
518 unsigned long *ds_cnt, /* number of data sources in file */
519 rrd_value_t **data) /* two dimensional array containing the data */
520 {
521 int i,reduce_factor = ceil((double)(*step) / (double)cur_step);
522 unsigned long col,dst_row,row_cnt,start_offset,end_offset,skiprows=0;
523 rrd_value_t *srcptr,*dstptr;
525 (*step) = cur_step*reduce_factor; /* set new step size for reduced data */
526 dstptr = *data;
527 srcptr = *data;
528 row_cnt = ((*end)-(*start))/cur_step;
530 #ifdef DEBUG
531 #define DEBUG_REDUCE
532 #endif
533 #ifdef DEBUG_REDUCE
534 printf("Reducing %lu rows with factor %i time %lu to %lu, step %lu\n",
535 row_cnt,reduce_factor,*start,*end,cur_step);
536 for (col=0;col<row_cnt;col++) {
537 printf("time %10lu: ",*start+(col+1)*cur_step);
538 for (i=0;i<*ds_cnt;i++)
539 printf(" %8.2e",srcptr[*ds_cnt*col+i]);
540 printf("\n");
541 }
542 #endif
544 /* We have to combine [reduce_factor] rows of the source
545 ** into one row for the destination. Doing this we also
546 ** need to take care to combine the correct rows. First
547 ** alter the start and end time so that they are multiples
548 ** of the new step time. We cannot reduce the amount of
549 ** time so we have to move the end towards the future and
550 ** the start towards the past.
551 */
552 end_offset = (*end) % (*step);
553 start_offset = (*start) % (*step);
555 /* If there is a start offset (which cannot be more than
556 ** one destination row), skip the appropriate number of
557 ** source rows and one destination row. The appropriate
558 ** number is what we do know (start_offset/cur_step) of
559 ** the new interval (*step/cur_step aka reduce_factor).
560 */
561 #ifdef DEBUG_REDUCE
562 printf("start_offset: %lu end_offset: %lu\n",start_offset,end_offset);
563 printf("row_cnt before: %lu\n",row_cnt);
564 #endif
565 if (start_offset) {
566 (*start) = (*start)-start_offset;
567 skiprows=reduce_factor-start_offset/cur_step;
568 srcptr+=skiprows* *ds_cnt;
569 for (col=0;col<(*ds_cnt);col++) *dstptr++ = DNAN;
570 row_cnt-=skiprows;
571 }
572 #ifdef DEBUG_REDUCE
573 printf("row_cnt between: %lu\n",row_cnt);
574 #endif
576 /* At the end we have some rows that are not going to be
577 ** used, the amount is end_offset/cur_step
578 */
579 if (end_offset) {
580 (*end) = (*end)-end_offset+(*step);
581 skiprows = end_offset/cur_step;
582 row_cnt-=skiprows;
583 }
584 #ifdef DEBUG_REDUCE
585 printf("row_cnt after: %lu\n",row_cnt);
586 #endif
588 /* Sanity check: row_cnt should be multiple of reduce_factor */
589 /* if this gets triggered, something is REALLY WRONG ... we die immediately */
591 if (row_cnt%reduce_factor) {
592 printf("SANITY CHECK: %lu rows cannot be reduced by %i \n",
593 row_cnt,reduce_factor);
594 printf("BUG in reduce_data()\n");
595 exit(1);
596 }
598 /* Now combine reduce_factor intervals at a time
599 ** into one interval for the destination.
600 */
602 for (dst_row=0;row_cnt>=reduce_factor;dst_row++) {
603 for (col=0;col<(*ds_cnt);col++) {
604 rrd_value_t newval=DNAN;
605 unsigned long validval=0;
607 for (i=0;i<reduce_factor;i++) {
608 if (isnan(srcptr[i*(*ds_cnt)+col])) {
609 continue;
610 }
611 validval++;
612 if (isnan(newval)) newval = srcptr[i*(*ds_cnt)+col];
613 else {
614 switch (cf) {
615 case CF_HWPREDICT:
616 case CF_DEVSEASONAL:
617 case CF_DEVPREDICT:
618 case CF_SEASONAL:
619 case CF_AVERAGE:
620 newval += srcptr[i*(*ds_cnt)+col];
621 break;
622 case CF_MINIMUM:
623 newval = min (newval,srcptr[i*(*ds_cnt)+col]);
624 break;
625 case CF_FAILURES:
626 /* an interval contains a failure if any subintervals contained a failure */
627 case CF_MAXIMUM:
628 newval = max (newval,srcptr[i*(*ds_cnt)+col]);
629 break;
630 case CF_LAST:
631 newval = srcptr[i*(*ds_cnt)+col];
632 break;
633 }
634 }
635 }
636 if (validval == 0){newval = DNAN;} else{
637 switch (cf) {
638 case CF_HWPREDICT:
639 case CF_DEVSEASONAL:
640 case CF_DEVPREDICT:
641 case CF_SEASONAL:
642 case CF_AVERAGE:
643 newval /= validval;
644 break;
645 case CF_MINIMUM:
646 case CF_FAILURES:
647 case CF_MAXIMUM:
648 case CF_LAST:
649 break;
650 }
651 }
652 *dstptr++=newval;
653 }
654 srcptr+=(*ds_cnt)*reduce_factor;
655 row_cnt-=reduce_factor;
656 }
657 /* If we had to alter the endtime, we didn't have enough
658 ** source rows to fill the last row. Fill it with NaN.
659 */
660 if (end_offset) for (col=0;col<(*ds_cnt);col++) *dstptr++ = DNAN;
661 #ifdef DEBUG_REDUCE
662 row_cnt = ((*end)-(*start))/ *step;
663 srcptr = *data;
664 printf("Done reducing. Currently %lu rows, time %lu to %lu, step %lu\n",
665 row_cnt,*start,*end,*step);
666 for (col=0;col<row_cnt;col++) {
667 printf("time %10lu: ",*start+(col+1)*(*step));
668 for (i=0;i<*ds_cnt;i++)
669 printf(" %8.2e",srcptr[*ds_cnt*col+i]);
670 printf("\n");
671 }
672 #endif
673 }
676 /* get the data required for the graphs from the
677 relevant rrds ... */
679 int
680 data_fetch( image_desc_t *im )
681 {
682 int i,ii;
683 int skip;
685 /* pull the data from the log files ... */
686 for (i=0;i<im->gdes_c;i++){
687 /* only GF_DEF elements fetch data */
688 if (im->gdes[i].gf != GF_DEF)
689 continue;
691 skip=0;
692 /* do we have it already ?*/
693 for (ii=0;ii<i;ii++) {
694 if (im->gdes[ii].gf != GF_DEF)
695 continue;
696 if ((strcmp(im->gdes[i].rrd, im->gdes[ii].rrd) == 0)
697 && (im->gdes[i].cf == im->gdes[ii].cf)
698 && (im->gdes[i].start == im->gdes[ii].start)
699 && (im->gdes[i].end == im->gdes[ii].end)
700 && (im->gdes[i].step == im->gdes[ii].step)) {
701 /* OK, the data is already there.
702 ** Just copy the header portion
703 */
704 im->gdes[i].start = im->gdes[ii].start;
705 im->gdes[i].end = im->gdes[ii].end;
706 im->gdes[i].step = im->gdes[ii].step;
707 im->gdes[i].ds_cnt = im->gdes[ii].ds_cnt;
708 im->gdes[i].ds_namv = im->gdes[ii].ds_namv;
709 im->gdes[i].data = im->gdes[ii].data;
710 im->gdes[i].data_first = 0;
711 skip=1;
712 }
713 if (skip)
714 break;
715 }
716 if (! skip) {
717 unsigned long ft_step = im->gdes[i].step ;
719 if((rrd_fetch_fn(im->gdes[i].rrd,
720 im->gdes[i].cf,
721 &im->gdes[i].start,
722 &im->gdes[i].end,
723 &ft_step,
724 &im->gdes[i].ds_cnt,
725 &im->gdes[i].ds_namv,
726 &im->gdes[i].data)) == -1){
727 return -1;
728 }
729 im->gdes[i].data_first = 1;
731 if (ft_step < im->gdes[i].step) {
732 reduce_data(im->gdes[i].cf,
733 ft_step,
734 &im->gdes[i].start,
735 &im->gdes[i].end,
736 &im->gdes[i].step,
737 &im->gdes[i].ds_cnt,
738 &im->gdes[i].data);
739 } else {
740 im->gdes[i].step = ft_step;
741 }
742 }
744 /* lets see if the required data source is realy there */
745 for(ii=0;ii<im->gdes[i].ds_cnt;ii++){
746 if(strcmp(im->gdes[i].ds_namv[ii],im->gdes[i].ds_nam) == 0){
747 im->gdes[i].ds=ii; }
748 }
749 if (im->gdes[i].ds== -1){
750 rrd_set_error("No DS called '%s' in '%s'",
751 im->gdes[i].ds_nam,im->gdes[i].rrd);
752 return -1;
753 }
755 }
756 return 0;
757 }
759 /* evaluate the expressions in the CDEF functions */
761 /*************************************************************
762 * CDEF stuff
763 *************************************************************/
765 long
766 find_var_wrapper(void *arg1, char *key)
767 {
768 return find_var((image_desc_t *) arg1, key);
769 }
771 /* find gdes containing var*/
772 long
773 find_var(image_desc_t *im, char *key){
774 long ii;
775 for(ii=0;ii<im->gdes_c-1;ii++){
776 if((im->gdes[ii].gf == GF_DEF
777 || im->gdes[ii].gf == GF_VDEF
778 || im->gdes[ii].gf == GF_CDEF)
779 && (strcmp(im->gdes[ii].vname,key) == 0)){
780 return ii;
781 }
782 }
783 return -1;
784 }
786 /* find the largest common denominator for all the numbers
787 in the 0 terminated num array */
788 long
789 lcd(long *num){
790 long rest;
791 int i;
792 for (i=0;num[i+1]!=0;i++){
793 do {
794 rest=num[i] % num[i+1];
795 num[i]=num[i+1]; num[i+1]=rest;
796 } while (rest!=0);
797 num[i+1] = num[i];
798 }
799 /* return i==0?num[i]:num[i-1]; */
800 return num[i];
801 }
803 /* run the rpn calculator on all the VDEF and CDEF arguments */
804 int
805 data_calc( image_desc_t *im){
807 int gdi;
808 int dataidx;
809 long *steparray, rpi;
810 int stepcnt;
811 time_t now;
812 rpnstack_t rpnstack;
814 rpnstack_init(&rpnstack);
816 for (gdi=0;gdi<im->gdes_c;gdi++){
817 /* Look for GF_VDEF and GF_CDEF in the same loop,
818 * so CDEFs can use VDEFs and vice versa
819 */
820 switch (im->gdes[gdi].gf) {
821 case GF_XPORT:
822 break;
823 case GF_VDEF:
824 /* A VDEF has no DS. This also signals other parts
825 * of rrdtool that this is a VDEF value, not a CDEF.
826 */
827 im->gdes[gdi].ds_cnt = 0;
828 if (vdef_calc(im,gdi)) {
829 rrd_set_error("Error processing VDEF '%s'"
830 ,im->gdes[gdi].vname
831 );
832 rpnstack_free(&rpnstack);
833 return -1;
834 }
835 break;
836 case GF_CDEF:
837 im->gdes[gdi].ds_cnt = 1;
838 im->gdes[gdi].ds = 0;
839 im->gdes[gdi].data_first = 1;
840 im->gdes[gdi].start = 0;
841 im->gdes[gdi].end = 0;
842 steparray=NULL;
843 stepcnt = 0;
844 dataidx=-1;
846 /* Find the variables in the expression.
847 * - VDEF variables are substituted by their values
848 * and the opcode is changed into OP_NUMBER.
849 * - CDEF variables are analized for their step size,
850 * the lowest common denominator of all the step
851 * sizes of the data sources involved is calculated
852 * and the resulting number is the step size for the
853 * resulting data source.
854 */
855 for(rpi=0;im->gdes[gdi].rpnp[rpi].op != OP_END;rpi++){
856 if(im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
857 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER){
858 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
859 if (im->gdes[ptr].ds_cnt == 0) {
860 #if 0
861 printf("DEBUG: inside CDEF '%s' processing VDEF '%s'\n",
862 im->gdes[gdi].vname,
863 im->gdes[ptr].vname);
864 printf("DEBUG: value from vdef is %f\n",im->gdes[ptr].vf.val);
865 #endif
866 im->gdes[gdi].rpnp[rpi].val = im->gdes[ptr].vf.val;
867 im->gdes[gdi].rpnp[rpi].op = OP_NUMBER;
868 } else {
869 if ((steparray =
870 rrd_realloc(steparray,
871 (++stepcnt+1)*sizeof(*steparray)))==NULL){
872 rrd_set_error("realloc steparray");
873 rpnstack_free(&rpnstack);
874 return -1;
875 };
877 steparray[stepcnt-1] = im->gdes[ptr].step;
879 /* adjust start and end of cdef (gdi) so
880 * that it runs from the latest start point
881 * to the earliest endpoint of any of the
882 * rras involved (ptr)
883 */
884 if(im->gdes[gdi].start < im->gdes[ptr].start)
885 im->gdes[gdi].start = im->gdes[ptr].start;
887 if(im->gdes[gdi].end == 0 ||
888 im->gdes[gdi].end > im->gdes[ptr].end)
889 im->gdes[gdi].end = im->gdes[ptr].end;
891 /* store pointer to the first element of
892 * the rra providing data for variable,
893 * further save step size and data source
894 * count of this rra
895 */
896 im->gdes[gdi].rpnp[rpi].data = im->gdes[ptr].data + im->gdes[ptr].ds;
897 im->gdes[gdi].rpnp[rpi].step = im->gdes[ptr].step;
898 im->gdes[gdi].rpnp[rpi].ds_cnt = im->gdes[ptr].ds_cnt;
900 /* backoff the *.data ptr; this is done so
901 * rpncalc() function doesn't have to treat
902 * the first case differently
903 */
904 } /* if ds_cnt != 0 */
905 } /* if OP_VARIABLE */
906 } /* loop through all rpi */
908 /* move the data pointers to the correct period */
909 for(rpi=0;im->gdes[gdi].rpnp[rpi].op != OP_END;rpi++){
910 if(im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
911 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER){
912 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
913 if(im->gdes[gdi].start > im->gdes[ptr].start) {
914 im->gdes[gdi].rpnp[rpi].data += im->gdes[gdi].rpnp[rpi].ds_cnt;
915 }
916 }
917 }
920 if(steparray == NULL){
921 rrd_set_error("rpn expressions without DEF"
922 " or CDEF variables are not supported");
923 rpnstack_free(&rpnstack);
924 return -1;
925 }
926 steparray[stepcnt]=0;
927 /* Now find the resulting step. All steps in all
928 * used RRAs have to be visited
929 */
930 im->gdes[gdi].step = lcd(steparray);
931 free(steparray);
932 if((im->gdes[gdi].data = malloc((
933 (im->gdes[gdi].end-im->gdes[gdi].start)
934 / im->gdes[gdi].step)
935 * sizeof(double)))==NULL){
936 rrd_set_error("malloc im->gdes[gdi].data");
937 rpnstack_free(&rpnstack);
938 return -1;
939 }
941 /* Step through the new cdef results array and
942 * calculate the values
943 */
944 for (now = im->gdes[gdi].start + im->gdes[gdi].step;
945 now<=im->gdes[gdi].end;
946 now += im->gdes[gdi].step)
947 {
948 rpnp_t *rpnp = im -> gdes[gdi].rpnp;
950 /* 3rd arg of rpn_calc is for OP_VARIABLE lookups;
951 * in this case we are advancing by timesteps;
952 * we use the fact that time_t is a synonym for long
953 */
954 if (rpn_calc(rpnp,&rpnstack,(long) now,
955 im->gdes[gdi].data,++dataidx) == -1) {
956 /* rpn_calc sets the error string */
957 rpnstack_free(&rpnstack);
958 return -1;
959 }
960 } /* enumerate over time steps within a CDEF */
961 break;
962 default:
963 continue;
964 }
965 } /* enumerate over CDEFs */
966 rpnstack_free(&rpnstack);
967 return 0;
968 }
970 /* massage data so, that we get one value for each x coordinate in the graph */
971 int
972 data_proc( image_desc_t *im ){
973 long i,ii;
974 double pixstep = (double)(im->end-im->start)
975 /(double)im->xsize; /* how much time
976 passes in one pixel */
977 double paintval;
978 double minval=DNAN,maxval=DNAN;
980 unsigned long gr_time;
982 /* memory for the processed data */
983 for(i=0;i<im->gdes_c;i++) {
984 if((im->gdes[i].gf==GF_LINE) ||
985 (im->gdes[i].gf==GF_AREA) ||
986 (im->gdes[i].gf==GF_TICK) ||
987 (im->gdes[i].gf==GF_STACK)) {
988 if((im->gdes[i].p_data = malloc((im->xsize +1)
989 * sizeof(rrd_value_t)))==NULL){
990 rrd_set_error("malloc data_proc");
991 return -1;
992 }
993 }
994 }
996 for (i=0;i<im->xsize;i++) { /* for each pixel */
997 long vidx;
998 gr_time = im->start+pixstep*i; /* time of the current step */
999 paintval=0.0;
1001 for (ii=0;ii<im->gdes_c;ii++) {
1002 double value;
1003 switch (im->gdes[ii].gf) {
1004 case GF_LINE:
1005 case GF_AREA:
1006 case GF_TICK:
1007 if (!im->gdes[ii].stack)
1008 paintval = 0.0;
1009 case GF_STACK:
1010 value = im->gdes[ii].yrule;
1011 if (isnan(value)) { /* not a number or VDEF */
1012 /* The time of the data doesn't necessarily match
1013 ** the time of the graph. Beware.
1014 */
1015 vidx = im->gdes[ii].vidx;
1016 if ( (gr_time >= im->gdes[vidx].start) &&
1017 (gr_time <= im->gdes[vidx].end) ) {
1018 value = im->gdes[vidx].data[
1019 (unsigned long) floor(
1020 (double)(gr_time - im->gdes[vidx].start)
1021 / im->gdes[vidx].step)
1022 * im->gdes[vidx].ds_cnt
1023 + im->gdes[vidx].ds
1024 ];
1025 } else {
1026 value = DNAN;
1027 }
1028 };
1030 if (! isnan(value)) {
1031 paintval += value;
1032 im->gdes[ii].p_data[i] = paintval;
1033 /* GF_TICK: the data values are not
1034 ** relevant for min and max
1035 */
1036 if (finite(paintval) && im->gdes[ii].gf != GF_TICK ) {
1037 if (isnan(minval) || paintval < minval)
1038 minval = paintval;
1039 if (isnan(maxval) || paintval > maxval)
1040 maxval = paintval;
1041 }
1042 } else {
1043 im->gdes[ii].p_data[i] = DNAN;
1044 }
1045 break;
1046 default:
1047 break;
1048 }
1049 }
1050 }
1052 /* if min or max have not been asigned a value this is because
1053 there was no data in the graph ... this is not good ...
1054 lets set these to dummy values then ... */
1056 if (isnan(minval)) minval = 0.0;
1057 if (isnan(maxval)) maxval = 1.0;
1059 /* adjust min and max values */
1060 if (isnan(im->minval)
1061 /* don't adjust low-end with log scale */
1062 || ((!im->logarithmic && !im->rigid) && im->minval > minval)
1063 )
1064 im->minval = minval;
1065 if (isnan(im->maxval)
1066 || (!im->rigid && im->maxval < maxval)
1067 ) {
1068 if (im->logarithmic)
1069 im->maxval = maxval * 1.1;
1070 else
1071 im->maxval = maxval;
1072 }
1073 /* make sure min and max are not equal */
1074 if (im->minval == im->maxval) {
1075 im->maxval *= 1.01;
1076 if (! im->logarithmic) {
1077 im->minval *= 0.99;
1078 }
1079 /* make sure min and max are not both zero */
1080 if (im->maxval == 0.0) {
1081 im->maxval = 1.0;
1082 }
1083 }
1084 return 0;
1085 }
1089 /* identify the point where the first gridline, label ... gets placed */
1091 time_t
1092 find_first_time(
1093 time_t start, /* what is the initial time */
1094 enum tmt_en baseint, /* what is the basic interval */
1095 long basestep /* how many if these do we jump a time */
1096 )
1097 {
1098 struct tm tm;
1099 tm = *localtime(&start);
1100 switch(baseint){
1101 case TMT_SECOND:
1102 tm.tm_sec -= tm.tm_sec % basestep; break;
1103 case TMT_MINUTE:
1104 tm.tm_sec=0;
1105 tm.tm_min -= tm.tm_min % basestep;
1106 break;
1107 case TMT_HOUR:
1108 tm.tm_sec=0;
1109 tm.tm_min = 0;
1110 tm.tm_hour -= tm.tm_hour % basestep; break;
1111 case TMT_DAY:
1112 /* we do NOT look at the basestep for this ... */
1113 tm.tm_sec=0;
1114 tm.tm_min = 0;
1115 tm.tm_hour = 0; break;
1116 case TMT_WEEK:
1117 /* we do NOT look at the basestep for this ... */
1118 tm.tm_sec=0;
1119 tm.tm_min = 0;
1120 tm.tm_hour = 0;
1121 tm.tm_mday -= tm.tm_wday -1; /* -1 because we want the monday */
1122 if (tm.tm_wday==0) tm.tm_mday -= 7; /* we want the *previous* monday */
1123 break;
1124 case TMT_MONTH:
1125 tm.tm_sec=0;
1126 tm.tm_min = 0;
1127 tm.tm_hour = 0;
1128 tm.tm_mday = 1;
1129 tm.tm_mon -= tm.tm_mon % basestep; break;
1131 case TMT_YEAR:
1132 tm.tm_sec=0;
1133 tm.tm_min = 0;
1134 tm.tm_hour = 0;
1135 tm.tm_mday = 1;
1136 tm.tm_mon = 0;
1137 tm.tm_year -= (tm.tm_year+1900) % basestep;
1139 }
1140 return mktime(&tm);
1141 }
1142 /* identify the point where the next gridline, label ... gets placed */
1143 time_t
1144 find_next_time(
1145 time_t current, /* what is the initial time */
1146 enum tmt_en baseint, /* what is the basic interval */
1147 long basestep /* how many if these do we jump a time */
1148 )
1149 {
1150 struct tm tm;
1151 time_t madetime;
1152 tm = *localtime(¤t);
1153 do {
1154 switch(baseint){
1155 case TMT_SECOND:
1156 tm.tm_sec += basestep; break;
1157 case TMT_MINUTE:
1158 tm.tm_min += basestep; break;
1159 case TMT_HOUR:
1160 tm.tm_hour += basestep; break;
1161 case TMT_DAY:
1162 tm.tm_mday += basestep; break;
1163 case TMT_WEEK:
1164 tm.tm_mday += 7*basestep; break;
1165 case TMT_MONTH:
1166 tm.tm_mon += basestep; break;
1167 case TMT_YEAR:
1168 tm.tm_year += basestep;
1169 }
1170 madetime = mktime(&tm);
1171 } while (madetime == -1); /* this is necessary to skip impssible times
1172 like the daylight saving time skips */
1173 return madetime;
1175 }
1178 /* calculate values required for PRINT and GPRINT functions */
1180 int
1181 print_calc(image_desc_t *im, char ***prdata)
1182 {
1183 long i,ii,validsteps;
1184 double printval;
1185 time_t printtime;
1186 int graphelement = 0;
1187 long vidx;
1188 int max_ii;
1189 double magfact = -1;
1190 char *si_symb = "";
1191 char *percent_s;
1192 int prlines = 1;
1193 if (im->imginfo) prlines++;
1194 for(i=0;i<im->gdes_c;i++){
1195 switch(im->gdes[i].gf){
1196 case GF_PRINT:
1197 prlines++;
1198 if(((*prdata) = rrd_realloc((*prdata),prlines*sizeof(char *)))==NULL){
1199 rrd_set_error("realloc prdata");
1200 return 0;
1201 }
1202 case GF_GPRINT:
1203 /* PRINT and GPRINT can now print VDEF generated values.
1204 * There's no need to do any calculations on them as these
1205 * calculations were already made.
1206 */
1207 vidx = im->gdes[i].vidx;
1208 if (im->gdes[vidx].gf==GF_VDEF) { /* simply use vals */
1209 printval = im->gdes[vidx].vf.val;
1210 printtime = im->gdes[vidx].vf.when;
1211 } else { /* need to calculate max,min,avg etcetera */
1212 max_ii =((im->gdes[vidx].end
1213 - im->gdes[vidx].start)
1214 / im->gdes[vidx].step
1215 * im->gdes[vidx].ds_cnt);
1216 printval = DNAN;
1217 validsteps = 0;
1218 for( ii=im->gdes[vidx].ds;
1219 ii < max_ii;
1220 ii+=im->gdes[vidx].ds_cnt){
1221 if (! finite(im->gdes[vidx].data[ii]))
1222 continue;
1223 if (isnan(printval)){
1224 printval = im->gdes[vidx].data[ii];
1225 validsteps++;
1226 continue;
1227 }
1229 switch (im->gdes[i].cf){
1230 case CF_HWPREDICT:
1231 case CF_DEVPREDICT:
1232 case CF_DEVSEASONAL:
1233 case CF_SEASONAL:
1234 case CF_AVERAGE:
1235 validsteps++;
1236 printval += im->gdes[vidx].data[ii];
1237 break;
1238 case CF_MINIMUM:
1239 printval = min( printval, im->gdes[vidx].data[ii]);
1240 break;
1241 case CF_FAILURES:
1242 case CF_MAXIMUM:
1243 printval = max( printval, im->gdes[vidx].data[ii]);
1244 break;
1245 case CF_LAST:
1246 printval = im->gdes[vidx].data[ii];
1247 }
1248 }
1249 if (im->gdes[i].cf==CF_AVERAGE || im->gdes[i].cf > CF_LAST) {
1250 if (validsteps > 1) {
1251 printval = (printval / validsteps);
1252 }
1253 }
1254 } /* prepare printval */
1256 if (!strcmp(im->gdes[i].format,"%c")) { /* VDEF time print */
1257 if (im->gdes[i].gf == GF_PRINT){
1258 (*prdata)[prlines-2] = malloc((FMT_LEG_LEN+2)*sizeof(char));
1259 sprintf((*prdata)[prlines-2],"%s (%lu)",
1260 ctime(&printtime),printtime);
1261 (*prdata)[prlines-1] = NULL;
1262 } else {
1263 sprintf(im->gdes[i].legend,"%s (%lu)",
1264 ctime(&printtime),printtime);
1265 graphelement = 1;
1266 }
1267 } else {
1268 if ((percent_s = strstr(im->gdes[i].format,"%S")) != NULL) {
1269 /* Magfact is set to -1 upon entry to print_calc. If it
1270 * is still less than 0, then we need to run auto_scale.
1271 * Otherwise, put the value into the correct units. If
1272 * the value is 0, then do not set the symbol or magnification
1273 * so next the calculation will be performed again. */
1274 if (magfact < 0.0) {
1275 auto_scale(im,&printval,&si_symb,&magfact);
1276 if (printval == 0.0)
1277 magfact = -1.0;
1278 } else {
1279 printval /= magfact;
1280 }
1281 *(++percent_s) = 's';
1282 } else if (strstr(im->gdes[i].format,"%s") != NULL) {
1283 auto_scale(im,&printval,&si_symb,&magfact);
1284 }
1286 if (im->gdes[i].gf == GF_PRINT){
1287 (*prdata)[prlines-2] = malloc((FMT_LEG_LEN+2)*sizeof(char));
1288 (*prdata)[prlines-1] = NULL;
1289 if (bad_format(im->gdes[i].format)) {
1290 rrd_set_error("bad format for [G]PRINT in '%s'", im->gdes[i].format);
1291 return -1;
1292 }
1293 #ifdef HAVE_SNPRINTF
1294 snprintf((*prdata)[prlines-2],FMT_LEG_LEN,im->gdes[i].format,printval,si_symb);
1295 #else
1296 sprintf((*prdata)[prlines-2],im->gdes[i].format,printval,si_symb);
1297 #endif
1298 } else {
1299 /* GF_GPRINT */
1301 if (bad_format(im->gdes[i].format)) {
1302 rrd_set_error("bad format for [G]PRINT in '%s'", im->gdes[i].format);
1303 return -1;
1304 }
1305 #ifdef HAVE_SNPRINTF
1306 snprintf(im->gdes[i].legend,FMT_LEG_LEN-2,im->gdes[i].format,printval,si_symb);
1307 #else
1308 sprintf(im->gdes[i].legend,im->gdes[i].format,printval,si_symb);
1309 #endif
1310 graphelement = 1;
1311 }
1312 }
1313 break;
1314 case GF_LINE:
1315 case GF_AREA:
1316 case GF_TICK:
1317 case GF_STACK:
1318 case GF_HRULE:
1319 case GF_VRULE:
1320 graphelement = 1;
1321 break;
1322 case GF_COMMENT:
1323 case GF_DEF:
1324 case GF_CDEF:
1325 case GF_VDEF:
1326 case GF_PART:
1327 case GF_XPORT:
1328 break;
1329 }
1330 }
1331 return graphelement;
1332 }
1335 /* place legends with color spots */
1336 int
1337 leg_place(image_desc_t *im)
1338 {
1339 /* graph labels */
1340 int interleg = im->text_prop[TEXT_PROP_LEGEND].size*2.0;
1341 int box =im->text_prop[TEXT_PROP_LEGEND].size*1.5;
1342 int border = im->text_prop[TEXT_PROP_LEGEND].size*2.0;
1343 int fill=0, fill_last;
1344 int leg_c = 0;
1345 int leg_x = border, leg_y = im->yimg;
1346 int leg_cc;
1347 int glue = 0;
1348 int i,ii, mark = 0;
1349 char prt_fctn; /*special printfunctions */
1350 int *legspace;
1352 if( !(im->extra_flags & NOLEGEND) ) {
1353 if ((legspace = malloc(im->gdes_c*sizeof(int)))==NULL){
1354 rrd_set_error("malloc for legspace");
1355 return -1;
1356 }
1358 for(i=0;i<im->gdes_c;i++){
1359 fill_last = fill;
1361 leg_cc = strlen(im->gdes[i].legend);
1363 /* is there a controle code ant the end of the legend string ? */
1364 if (leg_cc >= 2 && im->gdes[i].legend[leg_cc-2] == '\\') {
1365 prt_fctn = im->gdes[i].legend[leg_cc-1];
1366 leg_cc -= 2;
1367 im->gdes[i].legend[leg_cc] = '\0';
1368 } else {
1369 prt_fctn = '\0';
1370 }
1371 /* remove exess space */
1372 while (prt_fctn=='g' &&
1373 leg_cc > 0 &&
1374 im->gdes[i].legend[leg_cc-1]==' '){
1375 leg_cc--;
1376 im->gdes[i].legend[leg_cc]='\0';
1377 }
1378 if (leg_cc != 0 ){
1379 legspace[i]=(prt_fctn=='g' ? 0 : interleg);
1381 if (fill > 0){
1382 /* no interleg space if string ends in \g */
1383 fill += legspace[i];
1384 }
1385 if (im->gdes[i].gf != GF_GPRINT &&
1386 im->gdes[i].gf != GF_COMMENT) {
1387 fill += box;
1388 }
1389 fill += gfx_get_text_width(im->canvas, fill+border,
1390 im->text_prop[TEXT_PROP_LEGEND].font,
1391 im->text_prop[TEXT_PROP_LEGEND].size,
1392 im->tabwidth,
1393 im->gdes[i].legend);
1394 leg_c++;
1395 } else {
1396 legspace[i]=0;
1397 }
1398 /* who said there was a special tag ... ?*/
1399 if (prt_fctn=='g') {
1400 prt_fctn = '\0';
1401 }
1402 if (prt_fctn == '\0') {
1403 if (i == im->gdes_c -1 ) prt_fctn ='l';
1405 /* is it time to place the legends ? */
1406 if (fill > im->ximg - 2*border){
1407 if (leg_c > 1) {
1408 /* go back one */
1409 i--;
1410 fill = fill_last;
1411 leg_c--;
1412 prt_fctn = 'j';
1413 } else {
1414 prt_fctn = 'l';
1415 }
1417 }
1418 }
1421 if (prt_fctn != '\0'){
1422 leg_x = border;
1423 if (leg_c >= 2 && prt_fctn == 'j') {
1424 glue = (im->ximg - fill - 2* border) / (leg_c-1);
1425 } else {
1426 glue = 0;
1427 }
1428 if (prt_fctn =='c') leg_x = (im->ximg - fill) / 2.0;
1429 if (prt_fctn =='r') leg_x = im->ximg - fill - border;
1431 for(ii=mark;ii<=i;ii++){
1432 if(im->gdes[ii].legend[0]=='\0')
1433 continue;
1434 im->gdes[ii].leg_x = leg_x;
1435 im->gdes[ii].leg_y = leg_y;
1436 leg_x +=
1437 gfx_get_text_width(im->canvas, leg_x,
1438 im->text_prop[TEXT_PROP_LEGEND].font,
1439 im->text_prop[TEXT_PROP_LEGEND].size,
1440 im->tabwidth,
1441 im->gdes[ii].legend)
1442 + legspace[ii]
1443 + glue;
1444 if (im->gdes[ii].gf != GF_GPRINT &&
1445 im->gdes[ii].gf != GF_COMMENT)
1446 leg_x += box;
1447 }
1448 leg_y = leg_y + im->text_prop[TEXT_PROP_LEGEND].size*1.2;
1449 if (prt_fctn == 's') leg_y -= im->text_prop[TEXT_PROP_LEGEND].size*1.2;
1450 fill = 0;
1451 leg_c = 0;
1452 mark = ii;
1453 }
1454 }
1455 im->yimg = leg_y;
1456 free(legspace);
1457 }
1458 return 0;
1459 }
1461 /* create a grid on the graph. it determines what to do
1462 from the values of xsize, start and end */
1464 /* the xaxis labels are determined from the number of seconds per pixel
1465 in the requested graph */
1469 int
1470 calc_horizontal_grid(image_desc_t *im)
1471 {
1472 double range;
1473 double scaledrange;
1474 int pixel,i;
1475 int gridind;
1476 int decimals, fractionals;
1478 im->ygrid_scale.labfact=2;
1479 gridind=-1;
1480 range = im->maxval - im->minval;
1481 scaledrange = range / im->magfact;
1483 /* does the scale of this graph make it impossible to put lines
1484 on it? If so, give up. */
1485 if (isnan(scaledrange)) {
1486 return 0;
1487 }
1489 /* find grid spaceing */
1490 pixel=1;
1491 if(isnan(im->ygridstep)){
1492 if(im->extra_flags & ALTYGRID) {
1493 /* find the value with max number of digits. Get number of digits */
1494 decimals = ceil(log10(max(fabs(im->maxval), fabs(im->minval))));
1495 if(decimals <= 0) /* everything is small. make place for zero */
1496 decimals = 1;
1498 fractionals = floor(log10(range));
1499 if(fractionals < 0) /* small amplitude. */
1500 sprintf(im->ygrid_scale.labfmt, "%%%d.%df", decimals - fractionals + 1, -fractionals + 1);
1501 else
1502 sprintf(im->ygrid_scale.labfmt, "%%%d.1f", decimals + 1);
1503 im->ygrid_scale.gridstep = pow((double)10, (double)fractionals);
1504 if(im->ygrid_scale.gridstep == 0) /* range is one -> 0.1 is reasonable scale */
1505 im->ygrid_scale.gridstep = 0.1;
1506 /* should have at least 5 lines but no more then 15 */
1507 if(range/im->ygrid_scale.gridstep < 5)
1508 im->ygrid_scale.gridstep /= 10;
1509 if(range/im->ygrid_scale.gridstep > 15)
1510 im->ygrid_scale.gridstep *= 10;
1511 if(range/im->ygrid_scale.gridstep > 5) {
1512 im->ygrid_scale.labfact = 1;
1513 if(range/im->ygrid_scale.gridstep > 8)
1514 im->ygrid_scale.labfact = 2;
1515 }
1516 else {
1517 im->ygrid_scale.gridstep /= 5;
1518 im->ygrid_scale.labfact = 5;
1519 }
1520 }
1521 else {
1522 for(i=0;ylab[i].grid > 0;i++){
1523 pixel = im->ysize / (scaledrange / ylab[i].grid);
1524 if (gridind == -1 && pixel > 5) {
1525 gridind = i;
1526 break;
1527 }
1528 }
1530 for(i=0; i<4;i++) {
1531 if (pixel * ylab[gridind].lfac[i] >= 2 * im->text_prop[TEXT_PROP_AXIS].size) {
1532 im->ygrid_scale.labfact = ylab[gridind].lfac[i];
1533 break;
1534 }
1535 }
1537 im->ygrid_scale.gridstep = ylab[gridind].grid * im->magfact;
1538 }
1539 } else {
1540 im->ygrid_scale.gridstep = im->ygridstep;
1541 im->ygrid_scale.labfact = im->ylabfact;
1542 }
1543 return 1;
1544 }
1546 int draw_horizontal_grid(image_desc_t *im)
1547 {
1548 int i;
1549 double scaledstep;
1550 char graph_label[100];
1551 double X0=im->xorigin;
1552 double X1=im->xorigin+im->xsize;
1554 int sgrid = (int)( im->minval / im->ygrid_scale.gridstep - 1);
1555 int egrid = (int)( im->maxval / im->ygrid_scale.gridstep + 1);
1556 scaledstep = im->ygrid_scale.gridstep/im->magfact;
1557 for (i = sgrid; i <= egrid; i++){
1558 double Y0=ytr(im,im->ygrid_scale.gridstep*i);
1559 if ( Y0 >= im->yorigin-im->ysize
1560 && Y0 <= im->yorigin){
1561 if(i % im->ygrid_scale.labfact == 0){
1562 if (i==0 || im->symbol == ' ') {
1563 if(scaledstep < 1){
1564 if(im->extra_flags & ALTYGRID) {
1565 sprintf(graph_label,im->ygrid_scale.labfmt,scaledstep*i);
1566 }
1567 else {
1568 sprintf(graph_label,"%4.1f",scaledstep*i);
1569 }
1570 } else {
1571 sprintf(graph_label,"%4.0f",scaledstep*i);
1572 }
1573 }else {
1574 if(scaledstep < 1){
1575 sprintf(graph_label,"%4.1f %c",scaledstep*i, im->symbol);
1576 } else {
1577 sprintf(graph_label,"%4.0f %c",scaledstep*i, im->symbol);
1578 }
1579 }
1581 gfx_new_text ( im->canvas,
1582 X0-im->text_prop[TEXT_PROP_AXIS].size/1.5, Y0,
1583 im->graph_col[GRC_FONT],
1584 im->text_prop[TEXT_PROP_AXIS].font,
1585 im->text_prop[TEXT_PROP_AXIS].size,
1586 im->tabwidth, 0.0, GFX_H_RIGHT, GFX_V_CENTER,
1587 graph_label );
1588 gfx_new_dashed_line ( im->canvas,
1589 X0-2,Y0,
1590 X1+2,Y0,
1591 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1592 im->grid_dash_on, im->grid_dash_off);
1594 } else {
1595 gfx_new_dashed_line ( im->canvas,
1596 X0-1,Y0,
1597 X1+1,Y0,
1598 GRIDWIDTH, im->graph_col[GRC_GRID],
1599 im->grid_dash_on, im->grid_dash_off);
1601 }
1602 }
1603 }
1604 return 1;
1605 }
1607 /* logaritmic horizontal grid */
1608 int
1609 horizontal_log_grid(image_desc_t *im)
1610 {
1611 double pixpex;
1612 int ii,i;
1613 int minoridx=0, majoridx=0;
1614 char graph_label[100];
1615 double X0,X1,Y0;
1616 double value, pixperstep, minstep;
1618 /* find grid spaceing */
1619 pixpex= (double)im->ysize / (log10(im->maxval) - log10(im->minval));
1621 if (isnan(pixpex)) {
1622 return 0;
1623 }
1625 for(i=0;yloglab[i][0] > 0;i++){
1626 minstep = log10(yloglab[i][0]);
1627 for(ii=1;yloglab[i][ii+1] > 0;ii++){
1628 if(yloglab[i][ii+2]==0){
1629 minstep = log10(yloglab[i][ii+1])-log10(yloglab[i][ii]);
1630 break;
1631 }
1632 }
1633 pixperstep = pixpex * minstep;
1634 if(pixperstep > 5){minoridx = i;}
1635 if(pixperstep > 2 * im->text_prop[TEXT_PROP_LEGEND].size){majoridx = i;}
1636 }
1638 X0=im->xorigin;
1639 X1=im->xorigin+im->xsize;
1640 /* paint minor grid */
1641 for (value = pow((double)10, log10(im->minval)
1642 - fmod(log10(im->minval),log10(yloglab[minoridx][0])));
1643 value <= im->maxval;
1644 value *= yloglab[minoridx][0]){
1645 if (value < im->minval) continue;
1646 i=0;
1647 while(yloglab[minoridx][++i] > 0){
1648 Y0 = ytr(im,value * yloglab[minoridx][i]);
1649 if (Y0 <= im->yorigin - im->ysize) break;
1650 gfx_new_dashed_line ( im->canvas,
1651 X0-1,Y0,
1652 X1+1,Y0,
1653 GRIDWIDTH, im->graph_col[GRC_GRID],
1654 im->grid_dash_on, im->grid_dash_off);
1655 }
1656 }
1658 /* paint major grid and labels*/
1659 for (value = pow((double)10, log10(im->minval)
1660 - fmod(log10(im->minval),log10(yloglab[majoridx][0])));
1661 value <= im->maxval;
1662 value *= yloglab[majoridx][0]){
1663 if (value < im->minval) continue;
1664 i=0;
1665 while(yloglab[majoridx][++i] > 0){
1666 Y0 = ytr(im,value * yloglab[majoridx][i]);
1667 if (Y0 <= im->yorigin - im->ysize) break;
1668 gfx_new_dashed_line ( im->canvas,
1669 X0-2,Y0,
1670 X1+2,Y0,
1671 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1672 im->grid_dash_on, im->grid_dash_off);
1674 sprintf(graph_label,"%3.0e",value * yloglab[majoridx][i]);
1675 gfx_new_text ( im->canvas,
1676 X0-im->text_prop[TEXT_PROP_AXIS].size/1.5, Y0,
1677 im->graph_col[GRC_FONT],
1678 im->text_prop[TEXT_PROP_AXIS].font,
1679 im->text_prop[TEXT_PROP_AXIS].size,
1680 im->tabwidth,0.0, GFX_H_RIGHT, GFX_V_CENTER,
1681 graph_label );
1682 }
1683 }
1684 return 1;
1685 }
1688 void
1689 vertical_grid(
1690 image_desc_t *im )
1691 {
1692 int xlab_sel; /* which sort of label and grid ? */
1693 time_t ti, tilab, timajor;
1694 long factor;
1695 char graph_label[100];
1696 double X0,Y0,Y1; /* points for filled graph and more*/
1699 /* the type of time grid is determined by finding
1700 the number of seconds per pixel in the graph */
1703 if(im->xlab_user.minsec == -1){
1704 factor=(im->end - im->start)/im->xsize;
1705 xlab_sel=0;
1706 while ( xlab[xlab_sel+1].minsec != -1
1707 && xlab[xlab_sel+1].minsec <= factor){ xlab_sel++; }
1708 im->xlab_user.gridtm = xlab[xlab_sel].gridtm;
1709 im->xlab_user.gridst = xlab[xlab_sel].gridst;
1710 im->xlab_user.mgridtm = xlab[xlab_sel].mgridtm;
1711 im->xlab_user.mgridst = xlab[xlab_sel].mgridst;
1712 im->xlab_user.labtm = xlab[xlab_sel].labtm;
1713 im->xlab_user.labst = xlab[xlab_sel].labst;
1714 im->xlab_user.precis = xlab[xlab_sel].precis;
1715 im->xlab_user.stst = xlab[xlab_sel].stst;
1716 }
1718 /* y coords are the same for every line ... */
1719 Y0 = im->yorigin;
1720 Y1 = im->yorigin-im->ysize;
1723 /* paint the minor grid */
1724 for(ti = find_first_time(im->start,
1725 im->xlab_user.gridtm,
1726 im->xlab_user.gridst),
1727 timajor = find_first_time(im->start,
1728 im->xlab_user.mgridtm,
1729 im->xlab_user.mgridst);
1730 ti < im->end;
1731 ti = find_next_time(ti,im->xlab_user.gridtm,im->xlab_user.gridst)
1732 ){
1733 /* are we inside the graph ? */
1734 if (ti < im->start || ti > im->end) continue;
1735 while (timajor < ti) {
1736 timajor = find_next_time(timajor,
1737 im->xlab_user.mgridtm, im->xlab_user.mgridst);
1738 }
1739 if (ti == timajor) continue; /* skip as falls on major grid line */
1740 X0 = xtr(im,ti);
1741 gfx_new_dashed_line(im->canvas,X0,Y0+1, X0,Y1-1,GRIDWIDTH,
1742 im->graph_col[GRC_GRID],
1743 im->grid_dash_on, im->grid_dash_off);
1745 }
1747 /* paint the major grid */
1748 for(ti = find_first_time(im->start,
1749 im->xlab_user.mgridtm,
1750 im->xlab_user.mgridst);
1751 ti < im->end;
1752 ti = find_next_time(ti,im->xlab_user.mgridtm,im->xlab_user.mgridst)
1753 ){
1754 /* are we inside the graph ? */
1755 if (ti < im->start || ti > im->end) continue;
1756 X0 = xtr(im,ti);
1757 gfx_new_dashed_line(im->canvas,X0,Y0+3, X0,Y1-2,MGRIDWIDTH,
1758 im->graph_col[GRC_MGRID],
1759 im->grid_dash_on, im->grid_dash_off);
1761 }
1762 /* paint the labels below the graph */
1763 for(ti = find_first_time(im->start,
1764 im->xlab_user.labtm,
1765 im->xlab_user.labst);
1766 ti <= im->end;
1767 ti = find_next_time(ti,im->xlab_user.labtm,im->xlab_user.labst)
1768 ){
1769 tilab= ti + im->xlab_user.precis/2; /* correct time for the label */
1770 /* are we inside the graph ? */
1771 if (ti < im->start || ti > im->end) continue;
1773 #if HAVE_STRFTIME
1774 strftime(graph_label,99,im->xlab_user.stst,localtime(&tilab));
1775 #else
1776 # error "your libc has no strftime I guess we'll abort the exercise here."
1777 #endif
1778 gfx_new_text ( im->canvas,
1779 xtr(im,tilab), Y0+im->text_prop[TEXT_PROP_AXIS].size/1.5,
1780 im->graph_col[GRC_FONT],
1781 im->text_prop[TEXT_PROP_AXIS].font,
1782 im->text_prop[TEXT_PROP_AXIS].size,
1783 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_TOP,
1784 graph_label );
1786 }
1788 }
1791 void
1792 axis_paint(
1793 image_desc_t *im
1794 )
1795 {
1796 /* draw x and y axis */
1797 gfx_new_line ( im->canvas, im->xorigin+im->xsize,im->yorigin,
1798 im->xorigin+im->xsize,im->yorigin-im->ysize,
1799 GRIDWIDTH, im->graph_col[GRC_GRID]);
1801 gfx_new_line ( im->canvas, im->xorigin,im->yorigin-im->ysize,
1802 im->xorigin+im->xsize,im->yorigin-im->ysize,
1803 GRIDWIDTH, im->graph_col[GRC_GRID]);
1805 gfx_new_line ( im->canvas, im->xorigin-4,im->yorigin,
1806 im->xorigin+im->xsize+4,im->yorigin,
1807 MGRIDWIDTH, im->graph_col[GRC_GRID]);
1809 gfx_new_line ( im->canvas, im->xorigin,im->yorigin+4,
1810 im->xorigin,im->yorigin-im->ysize-4,
1811 MGRIDWIDTH, im->graph_col[GRC_GRID]);
1814 /* arrow for X axis direction */
1815 gfx_new_area ( im->canvas,
1816 im->xorigin+im->xsize+3, im->yorigin-3,
1817 im->xorigin+im->xsize+3, im->yorigin+4,
1818 im->xorigin+im->xsize+8, im->yorigin+0.5, /* LINEOFFSET */
1819 im->graph_col[GRC_ARROW]);
1823 }
1825 void
1826 grid_paint(image_desc_t *im)
1827 {
1828 long i;
1829 int res=0;
1830 double X0,Y0; /* points for filled graph and more*/
1831 gfx_node_t *node;
1833 /* draw 3d border */
1834 node = gfx_new_area (im->canvas, 0,im->yimg,
1835 2,im->yimg-2,
1836 2,2,im->graph_col[GRC_SHADEA]);
1837 gfx_add_point( node , im->ximg - 2, 2 );
1838 gfx_add_point( node , im->ximg, 0 );
1839 gfx_add_point( node , 0,0 );
1840 /* gfx_add_point( node , 0,im->yimg ); */
1842 node = gfx_new_area (im->canvas, 2,im->yimg-2,
1843 im->ximg-2,im->yimg-2,
1844 im->ximg - 2, 2,
1845 im->graph_col[GRC_SHADEB]);
1846 gfx_add_point( node , im->ximg,0);
1847 gfx_add_point( node , im->ximg,im->yimg);
1848 gfx_add_point( node , 0,im->yimg);
1849 /* gfx_add_point( node , 0,im->yimg ); */
1852 if (im->draw_x_grid == 1 )
1853 vertical_grid(im);
1855 if (im->draw_y_grid == 1){
1856 if(im->logarithmic){
1857 res = horizontal_log_grid(im);
1858 } else {
1859 res = draw_horizontal_grid(im);
1860 }
1862 /* dont draw horizontal grid if there is no min and max val */
1863 if (! res ) {
1864 char *nodata = "No Data found";
1865 gfx_new_text(im->canvas,im->ximg/2, (2*im->yorigin-im->ysize) / 2,
1866 im->graph_col[GRC_FONT],
1867 im->text_prop[TEXT_PROP_AXIS].font,
1868 im->text_prop[TEXT_PROP_AXIS].size,
1869 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_CENTER,
1870 nodata );
1871 }
1872 }
1874 /* yaxis description */
1875 if (im->canvas->imgformat != IF_PNG) {
1876 gfx_new_text( im->canvas,
1877 7, (im->yorigin - im->ysize/2),
1878 im->graph_col[GRC_FONT],
1879 im->text_prop[TEXT_PROP_AXIS].font,
1880 im->text_prop[TEXT_PROP_AXIS].size, im->tabwidth, 270.0,
1881 GFX_H_CENTER, GFX_V_CENTER,
1882 im->ylegend);
1883 } else {
1884 /* horrible hack until we can actually print vertically */
1885 {
1886 int n;
1887 int l=strlen(im->ylegend);
1888 char s[2];
1889 for (n=0;n<strlen(im->ylegend);n++) {
1890 s[0]=im->ylegend[n];
1891 s[1]='\0';
1892 gfx_new_text(im->canvas,7,im->text_prop[TEXT_PROP_AXIS].size*(l-n),
1893 im->graph_col[GRC_FONT],
1894 im->text_prop[TEXT_PROP_AXIS].font,
1895 im->text_prop[TEXT_PROP_AXIS].size, im->tabwidth, 270.0,
1896 GFX_H_CENTER, GFX_V_CENTER,
1897 s);
1898 }
1899 }
1900 }
1902 /* graph title */
1903 gfx_new_text( im->canvas,
1904 im->ximg/2, im->text_prop[TEXT_PROP_TITLE].size,
1905 im->graph_col[GRC_FONT],
1906 im->text_prop[TEXT_PROP_TITLE].font,
1907 im->text_prop[TEXT_PROP_TITLE].size, im->tabwidth, 0.0,
1908 GFX_H_CENTER, GFX_V_CENTER,
1909 im->title);
1911 /* graph labels */
1912 if( !(im->extra_flags & NOLEGEND) ) {
1913 for(i=0;i<im->gdes_c;i++){
1914 if(im->gdes[i].legend[0] =='\0')
1915 continue;
1917 /* im->gdes[i].leg_y is the bottom of the legend */
1918 X0 = im->gdes[i].leg_x;
1919 Y0 = im->gdes[i].leg_y;
1920 /* Box needed? */
1921 if ( im->gdes[i].gf != GF_GPRINT
1922 && im->gdes[i].gf != GF_COMMENT) {
1923 int boxH, boxV;
1925 boxH = gfx_get_text_width(im->canvas, 0,
1926 im->text_prop[TEXT_PROP_AXIS].font,
1927 im->text_prop[TEXT_PROP_AXIS].size,
1928 im->tabwidth,"M") * 1.25;
1929 boxV = boxH;
1931 node = gfx_new_area(im->canvas,
1932 X0,Y0-boxV,
1933 X0,Y0,
1934 X0+boxH,Y0,
1935 im->gdes[i].col);
1936 gfx_add_point ( node, X0+boxH, Y0-boxV );
1937 node = gfx_new_line(im->canvas,
1938 X0,Y0-boxV, X0,Y0,
1939 1,0x000000FF);
1940 gfx_add_point(node,X0+boxH,Y0);
1941 gfx_add_point(node,X0+boxH,Y0-boxV);
1942 gfx_close_path(node);
1943 X0 += boxH / 1.25 * 2;
1944 }
1945 gfx_new_text ( im->canvas, X0, Y0,
1946 im->graph_col[GRC_FONT],
1947 im->text_prop[TEXT_PROP_AXIS].font,
1948 im->text_prop[TEXT_PROP_AXIS].size,
1949 im->tabwidth,0.0, GFX_H_LEFT, GFX_V_BOTTOM,
1950 im->gdes[i].legend );
1951 }
1952 }
1953 }
1956 /*****************************************************
1957 * lazy check make sure we rely need to create this graph
1958 *****************************************************/
1960 int lazy_check(image_desc_t *im){
1961 FILE *fd = NULL;
1962 int size = 1;
1963 struct stat imgstat;
1965 if (im->lazy == 0) return 0; /* no lazy option */
1966 if (stat(im->graphfile,&imgstat) != 0)
1967 return 0; /* can't stat */
1968 /* one pixel in the existing graph is more then what we would
1969 change here ... */
1970 if (time(NULL) - imgstat.st_mtime >
1971 (im->end - im->start) / im->xsize)
1972 return 0;
1973 if ((fd = fopen(im->graphfile,"rb")) == NULL)
1974 return 0; /* the file does not exist */
1975 switch (im->canvas->imgformat) {
1976 case IF_PNG:
1977 size = PngSize(fd,&(im->ximg),&(im->yimg));
1978 break;
1979 default:
1980 size = 1;
1981 }
1982 fclose(fd);
1983 return size;
1984 }
1986 void
1987 pie_part(image_desc_t *im, gfx_color_t color,
1988 double PieCenterX, double PieCenterY, double Radius,
1989 double startangle, double endangle)
1990 {
1991 gfx_node_t *node;
1992 double angle;
1993 double step=M_PI/50; /* Number of iterations for the circle;
1994 ** 10 is definitely too low, more than
1995 ** 50 seems to be overkill
1996 */
1998 /* Strange but true: we have to work clockwise or else
1999 ** anti aliasing nor transparency don't work.
2000 **
2001 ** This test is here to make sure we do it right, also
2002 ** this makes the for...next loop more easy to implement.
2003 ** The return will occur if the user enters a negative number
2004 ** (which shouldn't be done according to the specs) or if the
2005 ** programmers do something wrong (which, as we all know, never
2006 ** happens anyway :)
2007 */
2008 if (endangle<startangle) return;
2010 /* Hidden feature: Radius decreases each full circle */
2011 angle=startangle;
2012 while (angle>=2*M_PI) {
2013 angle -= 2*M_PI;
2014 Radius *= 0.8;
2015 }
2017 node=gfx_new_area(im->canvas,
2018 PieCenterX+sin(startangle)*Radius,
2019 PieCenterY-cos(startangle)*Radius,
2020 PieCenterX,
2021 PieCenterY,
2022 PieCenterX+sin(endangle)*Radius,
2023 PieCenterY-cos(endangle)*Radius,
2024 color);
2025 for (angle=endangle;angle-startangle>=step;angle-=step) {
2026 gfx_add_point(node,
2027 PieCenterX+sin(angle)*Radius,
2028 PieCenterY-cos(angle)*Radius );
2029 }
2030 }
2032 int
2033 graph_size_location(image_desc_t *im, int elements, int piechart )
2034 {
2035 /* The actual size of the image to draw is determined from
2036 ** several sources. The size given on the command line is
2037 ** the graph area but we need more as we have to draw labels
2038 ** and other things outside the graph area
2039 */
2041 /* +-+-------------------------------------------+
2042 ** |l|.................title.....................|
2043 ** |e+--+-------------------------------+--------+
2044 ** |b| b| | |
2045 ** |a| a| | pie |
2046 ** |l| l| main graph area | chart |
2047 ** |.| .| | area |
2048 ** |t| y| | |
2049 ** |r+--+-------------------------------+--------+
2050 ** |e| | x-axis labels | |
2051 ** |v+--+-------------------------------+--------+
2052 ** | |..............legends......................|
2053 ** +-+-------------------------------------------+
2054 */
2055 int Xvertical=0, Yvertical=0,
2056 Xtitle =0, Ytitle =0,
2057 Xylabel =0, Yylabel =0,
2058 Xmain =0, Ymain =0,
2059 Xpie =0, Ypie =0,
2060 Xxlabel =0, Yxlabel =0,
2061 #if 0
2062 Xlegend =0, Ylegend =0,
2063 #endif
2064 Xspacing =10, Yspacing =10;
2066 if (im->ylegend[0] != '\0') {
2067 Xvertical = im->text_prop[TEXT_PROP_LEGEND].size *2;
2068 Yvertical = im->text_prop[TEXT_PROP_LEGEND].size * (strlen(im->ylegend)+1);
2069 }
2071 if (im->title[0] != '\0') {
2072 /* The title is placed "inbetween" two text lines so it
2073 ** automatically has some vertical spacing. The horizontal
2074 ** spacing is added here, on each side.
2075 */
2076 Xtitle = gfx_get_text_width(im->canvas, 0,
2077 im->text_prop[TEXT_PROP_TITLE].font,
2078 im->text_prop[TEXT_PROP_TITLE].size,
2079 im->tabwidth,
2080 im->title) + 2*Xspacing;
2081 Ytitle = im->text_prop[TEXT_PROP_TITLE].size*2;
2082 }
2084 if (elements) {
2085 Xmain=im->xsize;
2086 Ymain=im->ysize;
2087 if (im->draw_x_grid) {
2088 Xxlabel=Xmain;
2089 Yxlabel=im->text_prop[TEXT_PROP_LEGEND].size *2;
2090 }
2091 if (im->draw_y_grid) {
2092 Xylabel=im->text_prop[TEXT_PROP_LEGEND].size *6;
2093 Yylabel=Ymain;
2094 }
2095 }
2097 if (piechart) {
2098 im->piesize=im->xsize<im->ysize?im->xsize:im->ysize;
2099 Xpie=im->piesize;
2100 Ypie=im->piesize;
2101 }
2103 /* Now calculate the total size. Insert some spacing where
2104 desired. im->xorigin and im->yorigin need to correspond
2105 with the lower left corner of the main graph area or, if
2106 this one is not set, the imaginary box surrounding the
2107 pie chart area. */
2109 /* The legend width cannot yet be determined, as a result we
2110 ** have problems adjusting the image to it. For now, we just
2111 ** forget about it at all; the legend will have to fit in the
2112 ** size already allocated.
2113 */
2114 im->ximg = Xylabel + Xmain + Xpie + Xspacing;
2115 if (Xmain) im->ximg += Xspacing;
2116 if (Xpie) im->ximg += Xspacing;
2117 im->xorigin = Xspacing + Xylabel;
2118 if (Xtitle > im->ximg) im->ximg = Xtitle;
2119 if (Xvertical) {
2120 im->ximg += Xvertical;
2121 im->xorigin += Xvertical;
2122 }
2123 xtr(im,0);
2125 /* The vertical size is interesting... we need to compare
2126 ** the sum of {Ytitle, Ymain, Yxlabel, Ylegend} with Yvertical
2127 ** however we need to know {Ytitle+Ymain+Yxlabel} in order to
2128 ** start even thinking about Ylegend.
2129 **
2130 ** Do it in three portions: First calculate the inner part,
2131 ** then do the legend, then adjust the total height of the img.
2132 */
2134 /* reserve space for main and/or pie */
2135 im->yimg = Ymain + Yxlabel;
2136 if (im->yimg < Ypie) im->yimg = Ypie;
2137 im->yorigin = im->yimg - Yxlabel;
2138 /* reserve space for the title *or* some padding above the graph */
2139 if (Ytitle) {
2140 im->yimg += Ytitle;
2141 im->yorigin += Ytitle;
2142 } else {
2143 im->yimg += Yspacing;
2144 im->yorigin += Yspacing;
2145 }
2146 /* reserve space for padding below the graph */
2147 im->yimg += Yspacing;
2148 ytr(im,DNAN);
2150 /* Determine where to place the legends onto the image.
2151 ** Adjust im->yimg to match the space requirements.
2152 */
2153 if(leg_place(im)==-1)
2154 return -1;
2156 /* last of three steps: check total height of image */
2157 if (im->yimg < Yvertical) im->yimg = Yvertical;
2159 #if 0
2160 if (Xlegend > im->ximg) {
2161 im->ximg = Xlegend;
2162 /* reposition Pie */
2163 }
2164 #endif
2166 /* The pie is placed in the upper right hand corner,
2167 ** just below the title (if any) and with sufficient
2168 ** padding.
2169 */
2170 if (elements) {
2171 im->pie_x = im->ximg - Xspacing - Xpie/2;
2172 im->pie_y = im->yorigin-Ymain+Ypie/2;
2173 } else {
2174 im->pie_x = im->ximg/2;
2175 im->pie_y = im->yorigin-Ypie/2;
2176 }
2178 return 0;
2179 }
2181 /* draw that picture thing ... */
2182 int
2183 graph_paint(image_desc_t *im, char ***calcpr)
2184 {
2185 int i,ii;
2186 int lazy = lazy_check(im);
2187 int piechart = 0;
2188 double PieStart=0.0;
2189 FILE *fo;
2190 gfx_node_t *node;
2192 double areazero = 0.0;
2193 enum gf_en stack_gf = GF_PRINT;
2194 graph_desc_t *lastgdes = NULL;
2196 /* if we are lazy and there is nothing to PRINT ... quit now */
2197 if (lazy && im->prt_c==0) return 0;
2199 /* pull the data from the rrd files ... */
2201 if(data_fetch(im)==-1)
2202 return -1;
2204 /* evaluate VDEF and CDEF operations ... */
2205 if(data_calc(im)==-1)
2206 return -1;
2208 /* check if we need to draw a piechart */
2209 for(i=0;i<im->gdes_c;i++){
2210 if (im->gdes[i].gf == GF_PART) {
2211 piechart=1;
2212 break;
2213 }
2214 }
2216 /* calculate and PRINT and GPRINT definitions. We have to do it at
2217 * this point because it will affect the length of the legends
2218 * if there are no graph elements we stop here ...
2219 * if we are lazy, try to quit ...
2220 */
2221 i=print_calc(im,calcpr);
2222 if(i<0) return -1;
2223 if(((i==0)&&(piechart==0)) || lazy) return 0;
2225 /* If there's only the pie chart to draw, signal this */
2226 if (i==0) piechart=2;
2228 /* get actual drawing data and find min and max values*/
2229 if(data_proc(im)==-1)
2230 return -1;
2232 if(!im->logarithmic){si_unit(im);} /* identify si magnitude Kilo, Mega Giga ? */
2234 if(!im->rigid && ! im->logarithmic)
2235 expand_range(im); /* make sure the upper and lower limit are
2236 sensible values */
2238 if (!calc_horizontal_grid(im))
2239 return -1;
2240 if (im->gridfit)
2241 apply_gridfit(im);
2243 /**************************************************************
2244 *** Calculating sizes and locations became a bit confusing ***
2245 *** so I moved this into a separate function. ***
2246 **************************************************************/
2247 if(graph_size_location(im,i,piechart)==-1)
2248 return -1;
2250 /* the actual graph is created by going through the individual
2251 graph elements and then drawing them */
2253 node=gfx_new_area ( im->canvas,
2254 0, 0,
2255 im->ximg, 0,
2256 im->ximg, im->yimg,
2257 im->graph_col[GRC_BACK]);
2259 gfx_add_point(node,0, im->yimg);
2261 if (piechart != 2) {
2262 node=gfx_new_area ( im->canvas,
2263 im->xorigin, im->yorigin,
2264 im->xorigin + im->xsize, im->yorigin,
2265 im->xorigin + im->xsize, im->yorigin-im->ysize,
2266 im->graph_col[GRC_CANVAS]);
2268 gfx_add_point(node,im->xorigin, im->yorigin - im->ysize);
2270 if (im->minval > 0.0)
2271 areazero = im->minval;
2272 if (im->maxval < 0.0)
2273 areazero = im->maxval;
2275 axis_paint(im);
2276 }
2278 if (piechart) {
2279 pie_part(im,im->graph_col[GRC_CANVAS],im->pie_x,im->pie_y,im->piesize*0.5,0,2*M_PI);
2280 }
2282 for(i=0;i<im->gdes_c;i++){
2283 switch(im->gdes[i].gf){
2284 case GF_CDEF:
2285 case GF_VDEF:
2286 case GF_DEF:
2287 case GF_PRINT:
2288 case GF_GPRINT:
2289 case GF_COMMENT:
2290 case GF_HRULE:
2291 case GF_VRULE:
2292 case GF_XPORT:
2293 break;
2294 case GF_TICK:
2295 for (ii = 0; ii < im->xsize; ii++)
2296 {
2297 if (!isnan(im->gdes[i].p_data[ii]) &&
2298 im->gdes[i].p_data[ii] > 0.0)
2299 {
2300 /* generate a tick */
2301 gfx_new_line(im->canvas, im -> xorigin + ii,
2302 im -> yorigin - (im -> gdes[i].yrule * im -> ysize),
2303 im -> xorigin + ii,
2304 im -> yorigin,
2305 1.0,
2306 im -> gdes[i].col );
2307 }
2308 }
2309 break;
2310 case GF_LINE:
2311 case GF_AREA:
2312 stack_gf = im->gdes[i].gf;
2313 case GF_STACK:
2314 /* fix data points at oo and -oo */
2315 for(ii=0;ii<im->xsize;ii++){
2316 if (isinf(im->gdes[i].p_data[ii])){
2317 if (im->gdes[i].p_data[ii] > 0) {
2318 im->gdes[i].p_data[ii] = im->maxval ;
2319 } else {
2320 im->gdes[i].p_data[ii] = im->minval ;
2321 }
2323 }
2324 } /* for */
2326 if (im->gdes[i].col != 0x0){
2327 /* GF_LINE and friend */
2328 if(stack_gf == GF_LINE ){
2329 node = NULL;
2330 for(ii=1;ii<im->xsize;ii++){
2331 if ( ! isnan(im->gdes[i].p_data[ii-1])
2332 && ! isnan(im->gdes[i].p_data[ii])){
2333 if (node == NULL){
2334 node = gfx_new_line(im->canvas,
2335 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii-1]),
2336 ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]),
2337 im->gdes[i].linewidth,
2338 im->gdes[i].col);
2339 } else {
2340 gfx_add_point(node,ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]));
2341 }
2342 } else {
2343 node = NULL;
2344 }
2345 }
2346 } else {
2347 int area_start=-1;
2348 node = NULL;
2349 for(ii=1;ii<im->xsize;ii++){
2350 /* open an area */
2351 if ( ! isnan(im->gdes[i].p_data[ii-1])
2352 && ! isnan(im->gdes[i].p_data[ii])){
2353 if (node == NULL){
2354 float ybase = 0.0;
2355 /*
2356 if (im->gdes[i].gf == GF_STACK) {
2357 */
2358 if ( (im->gdes[i].gf == GF_STACK)
2359 || (im->gdes[i].stack) ) {
2361 ybase = ytr(im,lastgdes->p_data[ii-1]);
2362 } else {
2363 ybase = ytr(im,areazero);
2364 }
2365 area_start = ii-1;
2366 node = gfx_new_area(im->canvas,
2367 ii-1+im->xorigin,ybase,
2368 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii-1]),
2369 ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]),
2370 im->gdes[i].col
2371 );
2372 } else {
2373 gfx_add_point(node,ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]));
2374 }
2375 }
2377 if ( node != NULL && (ii+1==im->xsize || isnan(im->gdes[i].p_data[ii]) )){
2378 /* GF_AREA STACK type*/
2379 /*
2380 if (im->gdes[i].gf == GF_STACK ) {
2381 */
2382 if ( (im->gdes[i].gf == GF_STACK)
2383 || (im->gdes[i].stack) ) {
2384 int iii;
2385 for (iii=ii-1;iii>area_start;iii--){
2386 gfx_add_point(node,iii+im->xorigin,ytr(im,lastgdes->p_data[iii]));
2387 }
2388 } else {
2389 gfx_add_point(node,ii+im->xorigin,ytr(im,areazero));
2390 };
2391 node=NULL;
2392 };
2393 }
2394 } /* else GF_LINE */
2395 } /* if color != 0x0 */
2396 /* make sure we do not run into trouble when stacking on NaN */
2397 for(ii=0;ii<im->xsize;ii++){
2398 if (isnan(im->gdes[i].p_data[ii])) {
2399 double ybase = 0.0;
2400 if (lastgdes) {
2401 ybase = ytr(im,lastgdes->p_data[ii-1]);
2402 };
2403 if (isnan(ybase) || !lastgdes ){
2404 ybase = ytr(im,areazero);
2405 }
2406 im->gdes[i].p_data[ii] = ybase;
2407 }
2408 }
2409 lastgdes = &(im->gdes[i]);
2410 break;
2411 case GF_PART:
2412 if(isnan(im->gdes[i].yrule)) /* fetch variable */
2413 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2415 if (finite(im->gdes[i].yrule)) { /* even the fetched var can be NaN */
2416 pie_part(im,im->gdes[i].col,
2417 im->pie_x,im->pie_y,im->piesize*0.4,
2418 M_PI*2.0*PieStart/100.0,
2419 M_PI*2.0*(PieStart+im->gdes[i].yrule)/100.0);
2420 PieStart += im->gdes[i].yrule;
2421 }
2422 break;
2423 } /* switch */
2424 }
2425 if (piechart==2) {
2426 im->draw_x_grid=0;
2427 im->draw_y_grid=0;
2428 }
2429 /* grid_paint also does the text */
2430 grid_paint(im);
2432 /* the RULES are the last thing to paint ... */
2433 for(i=0;i<im->gdes_c;i++){
2435 switch(im->gdes[i].gf){
2436 case GF_HRULE:
2437 if(isnan(im->gdes[i].yrule)) { /* fetch variable */
2438 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2439 };
2440 if(im->gdes[i].yrule >= im->minval
2441 && im->gdes[i].yrule <= im->maxval)
2442 gfx_new_line(im->canvas,
2443 im->xorigin,ytr(im,im->gdes[i].yrule),
2444 im->xorigin+im->xsize,ytr(im,im->gdes[i].yrule),
2445 1.0,im->gdes[i].col);
2446 break;
2447 case GF_VRULE:
2448 if(im->gdes[i].xrule == 0) { /* fetch variable */
2449 im->gdes[i].xrule = im->gdes[im->gdes[i].vidx].vf.when;
2450 };
2451 if(im->gdes[i].xrule >= im->start
2452 && im->gdes[i].xrule <= im->end)
2453 gfx_new_line(im->canvas,
2454 xtr(im,im->gdes[i].xrule),im->yorigin,
2455 xtr(im,im->gdes[i].xrule),im->yorigin-im->ysize,
2456 1.0,im->gdes[i].col);
2457 break;
2458 default:
2459 break;
2460 }
2461 }
2464 if (strcmp(im->graphfile,"-")==0) {
2465 #ifdef WIN32
2466 /* Change translation mode for stdout to BINARY */
2467 _setmode( _fileno( stdout ), O_BINARY );
2468 #endif
2469 fo = stdout;
2470 } else {
2471 if ((fo = fopen(im->graphfile,"wb")) == NULL) {
2472 rrd_set_error("Opening '%s' for write: %s",im->graphfile,
2473 strerror(errno));
2474 return (-1);
2475 }
2476 }
2477 gfx_render (im->canvas,im->ximg,im->yimg,0x0,fo);
2478 if (strcmp(im->graphfile,"-") != 0)
2479 fclose(fo);
2480 return 0;
2481 }
2484 /*****************************************************
2485 * graph stuff
2486 *****************************************************/
2488 int
2489 gdes_alloc(image_desc_t *im){
2491 long def_step = (im->end-im->start)/im->xsize;
2493 if (im->step > def_step) /* step can be increassed ... no decreassed */
2494 def_step = im->step;
2496 im->gdes_c++;
2498 if ((im->gdes = (graph_desc_t *) rrd_realloc(im->gdes, (im->gdes_c)
2499 * sizeof(graph_desc_t)))==NULL){
2500 rrd_set_error("realloc graph_descs");
2501 return -1;
2502 }
2505 im->gdes[im->gdes_c-1].step=def_step;
2506 im->gdes[im->gdes_c-1].stack=0;
2507 im->gdes[im->gdes_c-1].debug=0;
2508 im->gdes[im->gdes_c-1].start=im->start;
2509 im->gdes[im->gdes_c-1].end=im->end;
2510 im->gdes[im->gdes_c-1].vname[0]='\0';
2511 im->gdes[im->gdes_c-1].data=NULL;
2512 im->gdes[im->gdes_c-1].ds_namv=NULL;
2513 im->gdes[im->gdes_c-1].data_first=0;
2514 im->gdes[im->gdes_c-1].p_data=NULL;
2515 im->gdes[im->gdes_c-1].rpnp=NULL;
2516 im->gdes[im->gdes_c-1].col = 0x0;
2517 im->gdes[im->gdes_c-1].legend[0]='\0';
2518 im->gdes[im->gdes_c-1].rrd[0]='\0';
2519 im->gdes[im->gdes_c-1].ds=-1;
2520 im->gdes[im->gdes_c-1].p_data=NULL;
2521 im->gdes[im->gdes_c-1].yrule=DNAN;
2522 im->gdes[im->gdes_c-1].xrule=0;
2523 return 0;
2524 }
2526 /* copies input untill the first unescaped colon is found
2527 or until input ends. backslashes have to be escaped as well */
2528 int
2529 scan_for_col(char *input, int len, char *output)
2530 {
2531 int inp,outp=0;
2532 for (inp=0;
2533 inp < len &&
2534 input[inp] != ':' &&
2535 input[inp] != '\0';
2536 inp++){
2537 if (input[inp] == '\\' &&
2538 input[inp+1] != '\0' &&
2539 (input[inp+1] == '\\' ||
2540 input[inp+1] == ':')){
2541 output[outp++] = input[++inp];
2542 }
2543 else {
2544 output[outp++] = input[inp];
2545 }
2546 }
2547 output[outp] = '\0';
2548 return inp;
2549 }
2550 /* Some surgery done on this function, it became ridiculously big.
2551 ** Things moved:
2552 ** - initializing now in rrd_graph_init()
2553 ** - options parsing now in rrd_graph_options()
2554 ** - script parsing now in rrd_graph_script()
2555 */
2556 int
2557 rrd_graph(int argc, char **argv, char ***prdata, int *xsize, int *ysize)
2558 {
2559 image_desc_t im;
2561 rrd_graph_init(&im);
2563 rrd_graph_options(argc,argv,&im);
2564 if (rrd_test_error()) {
2565 im_free(&im);
2566 return -1;
2567 }
2569 if (strlen(argv[optind])>=MAXPATH) {
2570 rrd_set_error("filename (including path) too long");
2571 im_free(&im);
2572 return -1;
2573 }
2574 strncpy(im.graphfile,argv[optind],MAXPATH-1);
2575 im.graphfile[MAXPATH-1]='\0';
2577 rrd_graph_script(argc,argv,&im);
2578 if (rrd_test_error()) {
2579 im_free(&im);
2580 return -1;
2581 }
2583 /* Everything is now read and the actual work can start */
2585 (*prdata)=NULL;
2586 if (graph_paint(&im,prdata)==-1){
2587 im_free(&im);
2588 return -1;
2589 }
2591 /* The image is generated and needs to be output.
2592 ** Also, if needed, print a line with information about the image.
2593 */
2595 *xsize=im.ximg;
2596 *ysize=im.yimg;
2597 if (im.imginfo) {
2598 char *filename;
2599 if (!(*prdata)) {
2600 /* maybe prdata is not allocated yet ... lets do it now */
2601 if ((*prdata = calloc(2,sizeof(char *)))==NULL) {
2602 rrd_set_error("malloc imginfo");
2603 return -1;
2604 };
2605 }
2606 if(((*prdata)[0] = malloc((strlen(im.imginfo)+200+strlen(im.graphfile))*sizeof(char)))
2607 ==NULL){
2608 rrd_set_error("malloc imginfo");
2609 return -1;
2610 }
2611 filename=im.graphfile+strlen(im.graphfile);
2612 while(filename > im.graphfile) {
2613 if (*(filename-1)=='/' || *(filename-1)=='\\' ) break;
2614 filename--;
2615 }
2617 sprintf((*prdata)[0],im.imginfo,filename,(long)(im.canvas->zoom*im.ximg),(long)(im.canvas->zoom*im.yimg));
2618 }
2619 im_free(&im);
2620 return 0;
2621 }
2623 void
2624 rrd_graph_init(image_desc_t *im)
2625 {
2626 int i;
2628 #ifdef HAVE_TZSET
2629 tzset();
2630 #endif
2631 #ifdef HAVE_SETLOCALE
2632 setlocale(LC_TIME,"");
2633 #endif
2635 im->xlab_user.minsec = -1;
2636 im->ximg=0;
2637 im->yimg=0;
2638 im->xsize = 400;
2639 im->ysize = 100;
2640 im->step = 0;
2641 im->ylegend[0] = '\0';
2642 im->title[0] = '\0';
2643 im->minval = DNAN;
2644 im->maxval = DNAN;
2645 im->unitsexponent= 9999;
2646 im->extra_flags= 0;
2647 im->rigid = 0;
2648 im->gridfit = 1;
2649 im->imginfo = NULL;
2650 im->lazy = 0;
2651 im->logarithmic = 0;
2652 im->ygridstep = DNAN;
2653 im->draw_x_grid = 1;
2654 im->draw_y_grid = 1;
2655 im->base = 1000;
2656 im->prt_c = 0;
2657 im->gdes_c = 0;
2658 im->gdes = NULL;
2659 im->canvas = gfx_new_canvas();
2660 im->grid_dash_on = 1;
2661 im->grid_dash_off = 1;
2663 for(i=0;i<DIM(graph_col);i++)
2664 im->graph_col[i]=graph_col[i];
2666 for(i=0;i<DIM(text_prop);i++){
2667 im->text_prop[i].size = text_prop[i].size;
2668 im->text_prop[i].font = text_prop[i].font;
2669 }
2670 }
2672 void
2673 rrd_graph_options(int argc, char *argv[],image_desc_t *im)
2674 {
2675 int stroff;
2676 char *parsetime_error = NULL;
2677 char scan_gtm[12],scan_mtm[12],scan_ltm[12],col_nam[12];
2678 time_t start_tmp=0,end_tmp=0;
2679 long long_tmp;
2680 struct time_value start_tv, end_tv;
2681 gfx_color_t color;
2683 parsetime("end-24h", &start_tv);
2684 parsetime("now", &end_tv);
2686 while (1){
2687 static struct option long_options[] =
2688 {
2689 {"start", required_argument, 0, 's'},
2690 {"end", required_argument, 0, 'e'},
2691 {"x-grid", required_argument, 0, 'x'},
2692 {"y-grid", required_argument, 0, 'y'},
2693 {"vertical-label",required_argument,0,'v'},
2694 {"width", required_argument, 0, 'w'},
2695 {"height", required_argument, 0, 'h'},
2696 {"interlaced", no_argument, 0, 'i'},
2697 {"upper-limit",required_argument, 0, 'u'},
2698 {"lower-limit",required_argument, 0, 'l'},
2699 {"rigid", no_argument, 0, 'r'},
2700 {"base", required_argument, 0, 'b'},
2701 {"logarithmic",no_argument, 0, 'o'},
2702 {"color", required_argument, 0, 'c'},
2703 {"font", required_argument, 0, 'n'},
2704 {"title", required_argument, 0, 't'},
2705 {"imginfo", required_argument, 0, 'f'},
2706 {"imgformat", required_argument, 0, 'a'},
2707 {"lazy", no_argument, 0, 'z'},
2708 {"zoom", required_argument, 0, 'm'},
2709 {"no-legend", no_argument, 0, 'g'},
2710 {"alt-y-grid", no_argument, 0, 257 },
2711 {"alt-autoscale", no_argument, 0, 258 },
2712 {"alt-autoscale-max", no_argument, 0, 259 },
2713 {"units-exponent",required_argument, 0, 260},
2714 {"step", required_argument, 0, 261},
2715 {"no-gridfit", no_argument, 0, 262},
2716 {0,0,0,0}};
2717 int option_index = 0;
2718 int opt;
2721 opt = getopt_long(argc, argv,
2722 "s:e:x:y:v:w:h:iu:l:rb:oc:n:m:t:f:a:z:g",
2723 long_options, &option_index);
2725 if (opt == EOF)
2726 break;
2728 switch(opt) {
2729 case 257:
2730 im->extra_flags |= ALTYGRID;
2731 break;
2732 case 258:
2733 im->extra_flags |= ALTAUTOSCALE;
2734 break;
2735 case 259:
2736 im->extra_flags |= ALTAUTOSCALE_MAX;
2737 break;
2738 case 'g':
2739 im->extra_flags |= NOLEGEND;
2740 break;
2741 case 260:
2742 im->unitsexponent = atoi(optarg);
2743 break;
2744 case 261:
2745 im->step = atoi(optarg);
2746 break;
2747 case 262:
2748 im->gridfit = 0;
2749 break;
2750 case 's':
2751 if ((parsetime_error = parsetime(optarg, &start_tv))) {
2752 rrd_set_error( "start time: %s", parsetime_error );
2753 return;
2754 }
2755 break;
2756 case 'e':
2757 if ((parsetime_error = parsetime(optarg, &end_tv))) {
2758 rrd_set_error( "end time: %s", parsetime_error );
2759 return;
2760 }
2761 break;
2762 case 'x':
2763 if(strcmp(optarg,"none") == 0){
2764 im->draw_x_grid=0;
2765 break;
2766 };
2768 if(sscanf(optarg,
2769 "%10[A-Z]:%ld:%10[A-Z]:%ld:%10[A-Z]:%ld:%ld:%n",
2770 scan_gtm,
2771 &im->xlab_user.gridst,
2772 scan_mtm,
2773 &im->xlab_user.mgridst,
2774 scan_ltm,
2775 &im->xlab_user.labst,
2776 &im->xlab_user.precis,
2777 &stroff) == 7 && stroff != 0){
2778 strncpy(im->xlab_form, optarg+stroff, sizeof(im->xlab_form) - 1);
2779 if((im->xlab_user.gridtm = tmt_conv(scan_gtm)) == -1){
2780 rrd_set_error("unknown keyword %s",scan_gtm);
2781 return;
2782 } else if ((im->xlab_user.mgridtm = tmt_conv(scan_mtm)) == -1){
2783 rrd_set_error("unknown keyword %s",scan_mtm);
2784 return;
2785 } else if ((im->xlab_user.labtm = tmt_conv(scan_ltm)) == -1){
2786 rrd_set_error("unknown keyword %s",scan_ltm);
2787 return;
2788 }
2789 im->xlab_user.minsec = 1;
2790 im->xlab_user.stst = im->xlab_form;
2791 } else {
2792 rrd_set_error("invalid x-grid format");
2793 return;
2794 }
2795 break;
2796 case 'y':
2798 if(strcmp(optarg,"none") == 0){
2799 im->draw_y_grid=0;
2800 break;
2801 };
2803 if(sscanf(optarg,
2804 "%lf:%d",
2805 &im->ygridstep,
2806 &im->ylabfact) == 2) {
2807 if(im->ygridstep<=0){
2808 rrd_set_error("grid step must be > 0");
2809 return;
2810 } else if (im->ylabfact < 1){
2811 rrd_set_error("label factor must be > 0");
2812 return;
2813 }
2814 } else {
2815 rrd_set_error("invalid y-grid format");
2816 return;
2817 }
2818 break;
2819 case 'v':
2820 strncpy(im->ylegend,optarg,150);
2821 im->ylegend[150]='\0';
2822 break;
2823 case 'u':
2824 im->maxval = atof(optarg);
2825 break;
2826 case 'l':
2827 im->minval = atof(optarg);
2828 break;
2829 case 'b':
2830 im->base = atol(optarg);
2831 if(im->base != 1024 && im->base != 1000 ){
2832 rrd_set_error("the only sensible value for base apart from 1000 is 1024");
2833 return;
2834 }
2835 break;
2836 case 'w':
2837 long_tmp = atol(optarg);
2838 if (long_tmp < 10) {
2839 rrd_set_error("width below 10 pixels");
2840 return;
2841 }
2842 im->xsize = long_tmp;
2843 break;
2844 case 'h':
2845 long_tmp = atol(optarg);
2846 if (long_tmp < 10) {
2847 rrd_set_error("height below 10 pixels");
2848 return;
2849 }
2850 im->ysize = long_tmp;
2851 break;
2852 case 'i':
2853 im->canvas->interlaced = 1;
2854 break;
2855 case 'r':
2856 im->rigid = 1;
2857 break;
2858 case 'f':
2859 im->imginfo = optarg;
2860 break;
2861 case 'a':
2862 if((im->canvas->imgformat = if_conv(optarg)) == -1) {
2863 rrd_set_error("unsupported graphics format '%s'",optarg);
2864 return;
2865 }
2866 break;
2867 case 'z':
2868 im->lazy = 1;
2869 break;
2870 case 'o':
2871 im->logarithmic = 1;
2872 if (isnan(im->minval))
2873 im->minval=1;
2874 break;
2875 case 'c':
2876 if(sscanf(optarg,
2877 "%10[A-Z]#%8lx",
2878 col_nam,&color) == 2){
2879 int ci;
2880 if((ci=grc_conv(col_nam)) != -1){
2881 im->graph_col[ci]=color;
2882 } else {
2883 rrd_set_error("invalid color name '%s'",col_nam);
2884 }
2885 } else {
2886 rrd_set_error("invalid color def format");
2887 return;
2888 }
2889 break;
2890 case 'n':{
2891 /* originally this used char *prop = "" and
2892 ** char *font = "dummy" however this results
2893 ** in a SEG fault, at least on RH7.1
2894 **
2895 ** The current implementation isn't proper
2896 ** either, font is never freed and prop uses
2897 ** a fixed width string
2898 */
2899 char prop[100];
2900 double size = 1;
2901 char *font;
2903 font=malloc(255);
2904 if(sscanf(optarg,
2905 "%10[A-Z]:%lf:%s",
2906 prop,&size,font) == 3){
2907 int sindex;
2908 if((sindex=text_prop_conv(prop)) != -1){
2909 im->text_prop[sindex].size=size;
2910 im->text_prop[sindex].font=font;
2911 if (sindex==0) { /* the default */
2912 im->text_prop[TEXT_PROP_TITLE].size=size;
2913 im->text_prop[TEXT_PROP_TITLE].font=font;
2914 im->text_prop[TEXT_PROP_AXIS].size=size;
2915 im->text_prop[TEXT_PROP_AXIS].font=font;
2916 im->text_prop[TEXT_PROP_UNIT].size=size;
2917 im->text_prop[TEXT_PROP_UNIT].font=font;
2918 im->text_prop[TEXT_PROP_LEGEND].size=size;
2919 im->text_prop[TEXT_PROP_LEGEND].font=font;
2920 }
2921 } else {
2922 rrd_set_error("invalid fonttag '%s'",prop);
2923 return;
2924 }
2925 } else {
2926 rrd_set_error("invalid text property format");
2927 return;
2928 }
2929 break;
2930 }
2931 case 'm':
2932 im->canvas->zoom = atof(optarg);
2933 if (im->canvas->zoom <= 0.0) {
2934 rrd_set_error("zoom factor must be > 0");
2935 return;
2936 }
2937 break;
2938 case 't':
2939 strncpy(im->title,optarg,150);
2940 im->title[150]='\0';
2941 break;
2943 case '?':
2944 if (optopt != 0)
2945 rrd_set_error("unknown option '%c'", optopt);
2946 else
2947 rrd_set_error("unknown option '%s'",argv[optind-1]);
2948 return;
2949 }
2950 }
2952 if (optind >= argc) {
2953 rrd_set_error("missing filename");
2954 return;
2955 }
2957 if (im->logarithmic == 1 && (im->minval <= 0 || isnan(im->minval))){
2958 rrd_set_error("for a logarithmic yaxis you must specify a lower-limit > 0");
2959 return;
2960 }
2962 if (proc_start_end(&start_tv,&end_tv,&start_tmp,&end_tmp) == -1){
2963 /* error string is set in parsetime.c */
2964 return;
2965 }
2967 if (start_tmp < 3600*24*365*10){
2968 rrd_set_error("the first entry to fetch should be after 1980 (%ld)",start_tmp);
2969 return;
2970 }
2972 if (end_tmp < start_tmp) {
2973 rrd_set_error("start (%ld) should be less than end (%ld)",
2974 start_tmp, end_tmp);
2975 return;
2976 }
2978 im->start = start_tmp;
2979 im->end = end_tmp;
2980 }
2982 int
2983 rrd_graph_check_vname(image_desc_t *im, char *varname, char *err)
2984 {
2985 if ((im->gdes[im->gdes_c-1].vidx=find_var(im,varname))==-1) {
2986 rrd_set_error("Unknown variable '%s' in %s",varname,err);
2987 return -1;
2988 }
2989 return 0;
2990 }
2991 int
2992 rrd_graph_color(image_desc_t *im, char *var, char *err, int optional)
2993 {
2994 char *color;
2995 graph_desc_t *gdp=&im->gdes[im->gdes_c-1];
2997 color=strstr(var,"#");
2998 if (color==NULL) {
2999 if (optional==0) {
3000 rrd_set_error("Found no color in %s",err);
3001 return 0;
3002 }
3003 return 0;
3004 } else {
3005 int n=0;
3006 char *rest;
3007 gfx_color_t col;
3009 rest=strstr(color,":");
3010 if (rest!=NULL)
3011 n=rest-color;
3012 else
3013 n=strlen(color);
3015 switch (n) {
3016 case 7:
3017 sscanf(color,"#%6lx%n",&col,&n);
3018 col = (col << 8) + 0xff /* shift left by 8 */;
3019 if (n!=7) rrd_set_error("Color problem in %s",err);
3020 break;
3021 case 9:
3022 sscanf(color,"#%8lx%n",&col,&n);
3023 if (n==9) break;
3024 default:
3025 rrd_set_error("Color problem in %s",err);
3026 }
3027 if (rrd_test_error()) return 0;
3028 gdp->col = col;
3029 return n;
3030 }
3031 }
3032 int
3033 rrd_graph_legend(graph_desc_t *gdp, char *line)
3034 {
3035 int i;
3037 i=scan_for_col(line,FMT_LEG_LEN,gdp->legend);
3039 return (strlen(&line[i])==0);
3040 }
3043 int bad_format(char *fmt) {
3044 char *ptr;
3045 int n=0;
3046 ptr = fmt;
3047 while (*ptr != '\0')
3048 if (*ptr++ == '%') {
3050 /* line cannot end with percent char */
3051 if (*ptr == '\0') return 1;
3053 /* '%s', '%S' and '%%' are allowed */
3054 if (*ptr == 's' || *ptr == 'S' || *ptr == '%') ptr++;
3056 /* or else '% 6.2lf' and such are allowed */
3057 else {
3059 /* optional padding character */
3060 if (*ptr == ' ' || *ptr == '+' || *ptr == '-') ptr++;
3062 /* This should take care of 'm.n' with all three optional */
3063 while (*ptr >= '0' && *ptr <= '9') ptr++;
3064 if (*ptr == '.') ptr++;
3065 while (*ptr >= '0' && *ptr <= '9') ptr++;
3067 /* Either 'le' or 'lf' must follow here */
3068 if (*ptr++ != 'l') return 1;
3069 if (*ptr == 'e' || *ptr == 'f') ptr++;
3070 else return 1;
3071 n++;
3072 }
3073 }
3075 return (n!=1);
3076 }
3079 int
3080 vdef_parse(gdes,str)
3081 struct graph_desc_t *gdes;
3082 char *str;
3083 {
3084 /* A VDEF currently is either "func" or "param,func"
3085 * so the parsing is rather simple. Change if needed.
3086 */
3087 double param;
3088 char func[30];
3089 int n;
3091 n=0;
3092 sscanf(str,"%le,%29[A-Z]%n",¶m,func,&n);
3093 if (n==strlen(str)) { /* matched */
3094 ;
3095 } else {
3096 n=0;
3097 sscanf(str,"%29[A-Z]%n",func,&n);
3098 if (n==strlen(str)) { /* matched */
3099 param=DNAN;
3100 } else {
3101 rrd_set_error("Unknown function string '%s' in VDEF '%s'"
3102 ,str
3103 ,gdes->vname
3104 );
3105 return -1;
3106 }
3107 }
3108 if (!strcmp("PERCENT",func)) gdes->vf.op = VDEF_PERCENT;
3109 else if (!strcmp("MAXIMUM",func)) gdes->vf.op = VDEF_MAXIMUM;
3110 else if (!strcmp("AVERAGE",func)) gdes->vf.op = VDEF_AVERAGE;
3111 else if (!strcmp("MINIMUM",func)) gdes->vf.op = VDEF_MINIMUM;
3112 else if (!strcmp("TOTAL", func)) gdes->vf.op = VDEF_TOTAL;
3113 else if (!strcmp("FIRST", func)) gdes->vf.op = VDEF_FIRST;
3114 else if (!strcmp("LAST", func)) gdes->vf.op = VDEF_LAST;
3115 else {
3116 rrd_set_error("Unknown function '%s' in VDEF '%s'\n"
3117 ,func
3118 ,gdes->vname
3119 );
3120 return -1;
3121 };
3123 switch (gdes->vf.op) {
3124 case VDEF_PERCENT:
3125 if (isnan(param)) { /* no parameter given */
3126 rrd_set_error("Function '%s' needs parameter in VDEF '%s'\n"
3127 ,func
3128 ,gdes->vname
3129 );
3130 return -1;
3131 };
3132 if (param>=0.0 && param<=100.0) {
3133 gdes->vf.param = param;
3134 gdes->vf.val = DNAN; /* undefined */
3135 gdes->vf.when = 0; /* undefined */
3136 } else {
3137 rrd_set_error("Parameter '%f' out of range in VDEF '%s'\n"
3138 ,param
3139 ,gdes->vname
3140 );
3141 return -1;
3142 };
3143 break;
3144 case VDEF_MAXIMUM:
3145 case VDEF_AVERAGE:
3146 case VDEF_MINIMUM:
3147 case VDEF_TOTAL:
3148 case VDEF_FIRST:
3149 case VDEF_LAST:
3150 if (isnan(param)) {
3151 gdes->vf.param = DNAN;
3152 gdes->vf.val = DNAN;
3153 gdes->vf.when = 0;
3154 } else {
3155 rrd_set_error("Function '%s' needs no parameter in VDEF '%s'\n"
3156 ,func
3157 ,gdes->vname
3158 );
3159 return -1;
3160 };
3161 break;
3162 };
3163 return 0;
3164 }
3167 int
3168 vdef_calc(im,gdi)
3169 image_desc_t *im;
3170 int gdi;
3171 {
3172 graph_desc_t *src,*dst;
3173 rrd_value_t *data;
3174 long step,steps;
3176 dst = &im->gdes[gdi];
3177 src = &im->gdes[dst->vidx];
3178 data = src->data + src->ds;
3179 steps = (src->end - src->start) / src->step;
3181 #if 0
3182 printf("DEBUG: start == %lu, end == %lu, %lu steps\n"
3183 ,src->start
3184 ,src->end
3185 ,steps
3186 );
3187 #endif
3189 switch (dst->vf.op) {
3190 case VDEF_PERCENT: {
3191 rrd_value_t * array;
3192 int field;
3195 if ((array = malloc(steps*sizeof(double)))==NULL) {
3196 rrd_set_error("malloc VDEV_PERCENT");
3197 return -1;
3198 }
3199 for (step=0;step < steps; step++) {
3200 array[step]=data[step*src->ds_cnt];
3201 }
3202 qsort(array,step,sizeof(double),vdef_percent_compar);
3204 field = (steps-1)*dst->vf.param/100;
3205 dst->vf.val = array[field];
3206 dst->vf.when = 0; /* no time component */
3207 free(array);
3208 #if 0
3209 for(step=0;step<steps;step++)
3210 printf("DEBUG: %3li:%10.2f %c\n",step,array[step],step==field?'*':' ');
3211 #endif
3212 }
3213 break;
3214 case VDEF_MAXIMUM:
3215 step=0;
3216 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3217 if (step == steps) {
3218 dst->vf.val = DNAN;
3219 dst->vf.when = 0;
3220 } else {
3221 dst->vf.val = data[step*src->ds_cnt];
3222 dst->vf.when = src->start + (step+1)*src->step;
3223 }
3224 while (step != steps) {
3225 if (finite(data[step*src->ds_cnt])) {
3226 if (data[step*src->ds_cnt] > dst->vf.val) {
3227 dst->vf.val = data[step*src->ds_cnt];
3228 dst->vf.when = src->start + (step+1)*src->step;
3229 }
3230 }
3231 step++;
3232 }
3233 break;
3234 case VDEF_TOTAL:
3235 case VDEF_AVERAGE: {
3236 int cnt=0;
3237 double sum=0.0;
3238 for (step=0;step<steps;step++) {
3239 if (finite(data[step*src->ds_cnt])) {
3240 sum += data[step*src->ds_cnt];
3241 cnt ++;
3242 };
3243 }
3244 if (cnt) {
3245 if (dst->vf.op == VDEF_TOTAL) {
3246 dst->vf.val = sum*src->step;
3247 dst->vf.when = cnt*src->step; /* not really "when" */
3248 } else {
3249 dst->vf.val = sum/cnt;
3250 dst->vf.when = 0; /* no time component */
3251 };
3252 } else {
3253 dst->vf.val = DNAN;
3254 dst->vf.when = 0;
3255 }
3256 }
3257 break;
3258 case VDEF_MINIMUM:
3259 step=0;
3260 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3261 if (step == steps) {
3262 dst->vf.val = DNAN;
3263 dst->vf.when = 0;
3264 } else {
3265 dst->vf.val = data[step*src->ds_cnt];
3266 dst->vf.when = src->start + (step+1)*src->step;
3267 }
3268 while (step != steps) {
3269 if (finite(data[step*src->ds_cnt])) {
3270 if (data[step*src->ds_cnt] < dst->vf.val) {
3271 dst->vf.val = data[step*src->ds_cnt];
3272 dst->vf.when = src->start + (step+1)*src->step;
3273 }
3274 }
3275 step++;
3276 }
3277 break;
3278 case VDEF_FIRST:
3279 /* The time value returned here is one step before the
3280 * actual time value. This is the start of the first
3281 * non-NaN interval.
3282 */
3283 step=0;
3284 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3285 if (step == steps) { /* all entries were NaN */
3286 dst->vf.val = DNAN;
3287 dst->vf.when = 0;
3288 } else {
3289 dst->vf.val = data[step*src->ds_cnt];
3290 dst->vf.when = src->start + step*src->step;
3291 }
3292 break;
3293 case VDEF_LAST:
3294 /* The time value returned here is the
3295 * actual time value. This is the end of the last
3296 * non-NaN interval.
3297 */
3298 step=steps-1;
3299 while (step >= 0 && isnan(data[step*src->ds_cnt])) step--;
3300 if (step < 0) { /* all entries were NaN */
3301 dst->vf.val = DNAN;
3302 dst->vf.when = 0;
3303 } else {
3304 dst->vf.val = data[step*src->ds_cnt];
3305 dst->vf.when = src->start + (step+1)*src->step;
3306 }
3307 break;
3308 }
3309 return 0;
3310 }
3312 /* NaN < -INF < finite_values < INF */
3313 int
3314 vdef_percent_compar(a,b)
3315 const void *a,*b;
3316 {
3317 /* Equality is not returned; this doesn't hurt except
3318 * (maybe) for a little performance.
3319 */
3321 /* First catch NaN values. They are smallest */
3322 if (isnan( *(double *)a )) return -1;
3323 if (isnan( *(double *)b )) return 1;
3325 /* NaN doesn't reach this part so INF and -INF are extremes.
3326 * The sign from isinf() is compatible with the sign we return
3327 */
3328 if (isinf( *(double *)a )) return isinf( *(double *)a );
3329 if (isinf( *(double *)b )) return isinf( *(double *)b );
3331 /* If we reach this, both values must be finite */
3332 if ( *(double *)a < *(double *)b ) return -1; else return 1;
3333 }