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1 /****************************************************************************
2 * RRDtool 1.2.12 Copyright by Tobi Oetiker, 1997-2005
3 ****************************************************************************
4 * rrd__graph.c produce graphs from data in rrdfiles
5 ****************************************************************************/
8 #include <sys/stat.h>
10 #include "rrd_tool.h"
12 #if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
13 #include <io.h>
14 #include <fcntl.h>
15 #endif
17 #ifdef HAVE_TIME_H
18 #include <time.h>
19 #endif
21 #ifdef HAVE_LOCALE_H
22 #include <locale.h>
23 #endif
25 #include "rrd_graph.h"
27 /* some constant definitions */
31 #ifndef RRD_DEFAULT_FONT
32 /* there is special code later to pick Cour.ttf when running on windows */
33 #define RRD_DEFAULT_FONT "DejaVuSansMono-Roman.ttf"
34 #endif
36 text_prop_t text_prop[] = {
37 { 8.0, RRD_DEFAULT_FONT }, /* default */
38 { 9.0, RRD_DEFAULT_FONT }, /* title */
39 { 7.0, RRD_DEFAULT_FONT }, /* axis */
40 { 8.0, RRD_DEFAULT_FONT }, /* unit */
41 { 8.0, RRD_DEFAULT_FONT } /* legend */
42 };
44 xlab_t xlab[] = {
45 {0, 0, TMT_SECOND,30, TMT_MINUTE,5, TMT_MINUTE,5, 0,"%H:%M"},
46 {2, 0, TMT_MINUTE,1, TMT_MINUTE,5, TMT_MINUTE,5, 0,"%H:%M"},
47 {5, 0, TMT_MINUTE,2, TMT_MINUTE,10, TMT_MINUTE,10, 0,"%H:%M"},
48 {10, 0, TMT_MINUTE,5, TMT_MINUTE,20, TMT_MINUTE,20, 0,"%H:%M"},
49 {30, 0, TMT_MINUTE,10, TMT_HOUR,1, TMT_HOUR,1, 0,"%H:%M"},
50 {60, 0, TMT_MINUTE,30, TMT_HOUR,2, TMT_HOUR,2, 0,"%H:%M"},
51 {180, 0, TMT_HOUR,1, TMT_HOUR,6, TMT_HOUR,6, 0,"%H:%M"},
52 {180, 1*24*3600, TMT_HOUR,1, TMT_HOUR,6, TMT_HOUR,6, 0,"%a %H:%M"},
53 /*{300, 0, TMT_HOUR,3, TMT_HOUR,12, TMT_HOUR,12, 12*3600,"%a %p"}, this looks silly*/
54 {600, 0, TMT_HOUR,6, TMT_DAY,1, TMT_DAY,1, 24*3600,"%a"},
55 {600, 1*24*3600, TMT_HOUR,6, TMT_DAY,1, TMT_DAY,1, 24*3600,"%a %d"},
56 {1800, 0, TMT_HOUR,12, TMT_DAY,1, TMT_DAY,2, 24*3600,"%a"},
57 {1800, 1*24*3600, TMT_HOUR,12, TMT_DAY,1, TMT_DAY,2, 24*3600,"%a %d"},
58 {3600, 0, TMT_DAY,1, TMT_WEEK,1, TMT_WEEK,1, 7*24*3600,"Week %V"},
59 {3*3600, 0, TMT_WEEK,1, TMT_MONTH,1, TMT_WEEK,2, 7*24*3600,"Week %V"},
60 {6*3600, 0, TMT_MONTH,1, TMT_MONTH,1, TMT_MONTH,1, 30*24*3600,"%b"},
61 {48*3600, 0, TMT_MONTH,1, TMT_MONTH,3, TMT_MONTH,3, 30*24*3600,"%b"},
62 {10*24*3600, 0, TMT_YEAR,1, TMT_YEAR,1, TMT_YEAR,1, 365*24*3600,"%y"},
63 {-1,0,TMT_MONTH,0,TMT_MONTH,0,TMT_MONTH,0,0,""}
64 };
66 /* sensible logarithmic y label intervals ...
67 the first element of each row defines the possible starting points on the
68 y axis ... the other specify the */
70 double yloglab[][12]= {{ 1e9, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
71 { 1e3, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
72 { 1e1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
73 /* { 1e1, 1, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, */
74 { 1e1, 1, 2.5, 5, 7.5, 0, 0, 0, 0, 0, 0, 0 },
75 { 1e1, 1, 2, 4, 6, 8, 0, 0, 0, 0, 0, 0 },
76 { 1e1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0 },
77 { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }};
79 /* sensible y label intervals ...*/
81 ylab_t ylab[]= {
82 {0.1, {1,2, 5,10}},
83 {0.2, {1,5,10,20}},
84 {0.5, {1,2, 4,10}},
85 {1.0, {1,2, 5,10}},
86 {2.0, {1,5,10,20}},
87 {5.0, {1,2, 4,10}},
88 {10.0, {1,2, 5,10}},
89 {20.0, {1,5,10,20}},
90 {50.0, {1,2, 4,10}},
91 {100.0, {1,2, 5,10}},
92 {200.0, {1,5,10,20}},
93 {500.0, {1,2, 4,10}},
94 {0.0, {0,0,0,0}}};
97 gfx_color_t graph_col[] = /* default colors */
98 { 0xFFFFFFFF, /* canvas */
99 0xF0F0F0FF, /* background */
100 0xD0D0D0FF, /* shade A */
101 0xA0A0A0FF, /* shade B */
102 0x90909080, /* grid */
103 0xE0505080, /* major grid */
104 0x000000FF, /* font */
105 0x802020FF, /* arrow */
106 0x202020FF, /* axis */
107 0x000000FF /* frame */
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 +0.00001;
159 } else if (yval < im->yorigin - im->ysize){
160 yval = im->yorigin - im->ysize - 0.00001;
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 #ifdef WITH_PIECHART
188 conv_if(PART,GF_PART)
189 #endif
190 conv_if(XPORT,GF_XPORT)
191 conv_if(SHIFT,GF_SHIFT)
193 return (-1);
194 }
196 enum gfx_if_en if_conv(char *string){
198 conv_if(PNG,IF_PNG)
199 conv_if(SVG,IF_SVG)
200 conv_if(EPS,IF_EPS)
201 conv_if(PDF,IF_PDF)
203 return (-1);
204 }
206 enum tmt_en tmt_conv(char *string){
208 conv_if(SECOND,TMT_SECOND)
209 conv_if(MINUTE,TMT_MINUTE)
210 conv_if(HOUR,TMT_HOUR)
211 conv_if(DAY,TMT_DAY)
212 conv_if(WEEK,TMT_WEEK)
213 conv_if(MONTH,TMT_MONTH)
214 conv_if(YEAR,TMT_YEAR)
215 return (-1);
216 }
218 enum grc_en grc_conv(char *string){
220 conv_if(BACK,GRC_BACK)
221 conv_if(CANVAS,GRC_CANVAS)
222 conv_if(SHADEA,GRC_SHADEA)
223 conv_if(SHADEB,GRC_SHADEB)
224 conv_if(GRID,GRC_GRID)
225 conv_if(MGRID,GRC_MGRID)
226 conv_if(FONT,GRC_FONT)
227 conv_if(ARROW,GRC_ARROW)
228 conv_if(AXIS,GRC_AXIS)
229 conv_if(FRAME,GRC_FRAME)
231 return -1;
232 }
234 enum text_prop_en text_prop_conv(char *string){
236 conv_if(DEFAULT,TEXT_PROP_DEFAULT)
237 conv_if(TITLE,TEXT_PROP_TITLE)
238 conv_if(AXIS,TEXT_PROP_AXIS)
239 conv_if(UNIT,TEXT_PROP_UNIT)
240 conv_if(LEGEND,TEXT_PROP_LEGEND)
241 return -1;
242 }
245 #undef conv_if
247 int
248 im_free(image_desc_t *im)
249 {
250 unsigned long i,ii;
252 if (im == NULL) return 0;
253 for(i=0;i<(unsigned)im->gdes_c;i++){
254 if (im->gdes[i].data_first){
255 /* careful here, because a single pointer can occur several times */
256 free (im->gdes[i].data);
257 if (im->gdes[i].ds_namv){
258 for (ii=0;ii<im->gdes[i].ds_cnt;ii++)
259 free(im->gdes[i].ds_namv[ii]);
260 free(im->gdes[i].ds_namv);
261 }
262 }
263 free (im->gdes[i].p_data);
264 free (im->gdes[i].rpnp);
265 }
266 free(im->gdes);
267 gfx_destroy(im->canvas);
268 return 0;
269 }
271 /* find SI magnitude symbol for the given number*/
272 void
273 auto_scale(
274 image_desc_t *im, /* image description */
275 double *value,
276 char **symb_ptr,
277 double *magfact
278 )
279 {
281 char *symbol[] = {"a", /* 10e-18 Atto */
282 "f", /* 10e-15 Femto */
283 "p", /* 10e-12 Pico */
284 "n", /* 10e-9 Nano */
285 "u", /* 10e-6 Micro */
286 "m", /* 10e-3 Milli */
287 " ", /* Base */
288 "k", /* 10e3 Kilo */
289 "M", /* 10e6 Mega */
290 "G", /* 10e9 Giga */
291 "T", /* 10e12 Tera */
292 "P", /* 10e15 Peta */
293 "E"};/* 10e18 Exa */
295 int symbcenter = 6;
296 int sindex;
298 if (*value == 0.0 || isnan(*value) ) {
299 sindex = 0;
300 *magfact = 1.0;
301 } else {
302 sindex = floor(log(fabs(*value))/log((double)im->base));
303 *magfact = pow((double)im->base, (double)sindex);
304 (*value) /= (*magfact);
305 }
306 if ( sindex <= symbcenter && sindex >= -symbcenter) {
307 (*symb_ptr) = symbol[sindex+symbcenter];
308 }
309 else {
310 (*symb_ptr) = "?";
311 }
312 }
315 /* find SI magnitude symbol for the numbers on the y-axis*/
316 void
317 si_unit(
318 image_desc_t *im /* image description */
319 )
320 {
322 char symbol[] = {'a', /* 10e-18 Atto */
323 'f', /* 10e-15 Femto */
324 'p', /* 10e-12 Pico */
325 'n', /* 10e-9 Nano */
326 'u', /* 10e-6 Micro */
327 'm', /* 10e-3 Milli */
328 ' ', /* Base */
329 'k', /* 10e3 Kilo */
330 'M', /* 10e6 Mega */
331 'G', /* 10e9 Giga */
332 'T', /* 10e12 Tera */
333 'P', /* 10e15 Peta */
334 'E'};/* 10e18 Exa */
336 int symbcenter = 6;
337 double digits,viewdigits=0;
339 digits = floor( log( max( fabs(im->minval),fabs(im->maxval)))/log((double)im->base));
341 if (im->unitsexponent != 9999) {
342 /* unitsexponent = 9, 6, 3, 0, -3, -6, -9, etc */
343 viewdigits = floor(im->unitsexponent / 3);
344 } else {
345 viewdigits = digits;
346 }
348 im->magfact = pow((double)im->base , digits);
350 #ifdef DEBUG
351 printf("digits %6.3f im->magfact %6.3f\n",digits,im->magfact);
352 #endif
354 im->viewfactor = im->magfact / pow((double)im->base , viewdigits);
356 if ( ((viewdigits+symbcenter) < sizeof(symbol)) &&
357 ((viewdigits+symbcenter) >= 0) )
358 im->symbol = symbol[(int)viewdigits+symbcenter];
359 else
360 im->symbol = '?';
361 }
363 /* move min and max values around to become sensible */
365 void
366 expand_range(image_desc_t *im)
367 {
368 double sensiblevalues[] ={1000.0,900.0,800.0,750.0,700.0,
369 600.0,500.0,400.0,300.0,250.0,
370 200.0,125.0,100.0,90.0,80.0,
371 75.0,70.0,60.0,50.0,40.0,30.0,
372 25.0,20.0,10.0,9.0,8.0,
373 7.0,6.0,5.0,4.0,3.5,3.0,
374 2.5,2.0,1.8,1.5,1.2,1.0,
375 0.8,0.7,0.6,0.5,0.4,0.3,0.2,0.1,0.0,-1};
377 double scaled_min,scaled_max;
378 double adj;
379 int i;
383 #ifdef DEBUG
384 printf("Min: %6.2f Max: %6.2f MagFactor: %6.2f\n",
385 im->minval,im->maxval,im->magfact);
386 #endif
388 if (isnan(im->ygridstep)){
389 if(im->extra_flags & ALTAUTOSCALE) {
390 /* measure the amplitude of the function. Make sure that
391 graph boundaries are slightly higher then max/min vals
392 so we can see amplitude on the graph */
393 double delt, fact;
395 delt = im->maxval - im->minval;
396 adj = delt * 0.1;
397 fact = 2.0 * pow(10.0,
398 floor(log10(max(fabs(im->minval), fabs(im->maxval))/im->magfact)) - 2);
399 if (delt < fact) {
400 adj = (fact - delt) * 0.55;
401 #ifdef DEBUG
402 printf("Min: %6.2f Max: %6.2f delt: %6.2f fact: %6.2f adj: %6.2f\n", im->minval, im->maxval, delt, fact, adj);
403 #endif
404 }
405 im->minval -= adj;
406 im->maxval += adj;
407 }
408 else if(im->extra_flags & ALTAUTOSCALE_MAX) {
409 /* measure the amplitude of the function. Make sure that
410 graph boundaries are slightly higher than max vals
411 so we can see amplitude on the graph */
412 adj = (im->maxval - im->minval) * 0.1;
413 im->maxval += adj;
414 }
415 else {
416 scaled_min = im->minval / im->magfact;
417 scaled_max = im->maxval / im->magfact;
419 for (i=1; sensiblevalues[i] > 0; i++){
420 if (sensiblevalues[i-1]>=scaled_min &&
421 sensiblevalues[i]<=scaled_min)
422 im->minval = sensiblevalues[i]*(im->magfact);
424 if (-sensiblevalues[i-1]<=scaled_min &&
425 -sensiblevalues[i]>=scaled_min)
426 im->minval = -sensiblevalues[i-1]*(im->magfact);
428 if (sensiblevalues[i-1] >= scaled_max &&
429 sensiblevalues[i] <= scaled_max)
430 im->maxval = sensiblevalues[i-1]*(im->magfact);
432 if (-sensiblevalues[i-1]<=scaled_max &&
433 -sensiblevalues[i] >=scaled_max)
434 im->maxval = -sensiblevalues[i]*(im->magfact);
435 }
436 }
437 } else {
438 /* adjust min and max to the grid definition if there is one */
439 im->minval = (double)im->ylabfact * im->ygridstep *
440 floor(im->minval / ((double)im->ylabfact * im->ygridstep));
441 im->maxval = (double)im->ylabfact * im->ygridstep *
442 ceil(im->maxval /( (double)im->ylabfact * im->ygridstep));
443 }
445 #ifdef DEBUG
446 fprintf(stderr,"SCALED Min: %6.2f Max: %6.2f Factor: %6.2f\n",
447 im->minval,im->maxval,im->magfact);
448 #endif
449 }
451 void
452 apply_gridfit(image_desc_t *im)
453 {
454 if (isnan(im->minval) || isnan(im->maxval))
455 return;
456 ytr(im,DNAN);
457 if (im->logarithmic) {
458 double ya, yb, ypix, ypixfrac;
459 double log10_range = log10(im->maxval) - log10(im->minval);
460 ya = pow((double)10, floor(log10(im->minval)));
461 while (ya < im->minval)
462 ya *= 10;
463 if (ya > im->maxval)
464 return; /* don't have y=10^x gridline */
465 yb = ya * 10;
466 if (yb <= im->maxval) {
467 /* we have at least 2 y=10^x gridlines.
468 Make sure distance between them in pixels
469 are an integer by expanding im->maxval */
470 double y_pixel_delta = ytr(im, ya) - ytr(im, yb);
471 double factor = y_pixel_delta / floor(y_pixel_delta);
472 double new_log10_range = factor * log10_range;
473 double new_ymax_log10 = log10(im->minval) + new_log10_range;
474 im->maxval = pow(10, new_ymax_log10);
475 ytr(im,DNAN); /* reset precalc */
476 log10_range = log10(im->maxval) - log10(im->minval);
477 }
478 /* make sure first y=10^x gridline is located on
479 integer pixel position by moving scale slightly
480 downwards (sub-pixel movement) */
481 ypix = ytr(im, ya) + im->ysize; /* add im->ysize so it always is positive */
482 ypixfrac = ypix - floor(ypix);
483 if (ypixfrac > 0 && ypixfrac < 1) {
484 double yfrac = ypixfrac / im->ysize;
485 im->minval = pow(10, log10(im->minval) - yfrac * log10_range);
486 im->maxval = pow(10, log10(im->maxval) - yfrac * log10_range);
487 ytr(im,DNAN); /* reset precalc */
488 }
489 } else {
490 /* Make sure we have an integer pixel distance between
491 each minor gridline */
492 double ypos1 = ytr(im, im->minval);
493 double ypos2 = ytr(im, im->minval + im->ygrid_scale.gridstep);
494 double y_pixel_delta = ypos1 - ypos2;
495 double factor = y_pixel_delta / floor(y_pixel_delta);
496 double new_range = factor * (im->maxval - im->minval);
497 double gridstep = im->ygrid_scale.gridstep;
498 double minor_y, minor_y_px, minor_y_px_frac;
499 im->maxval = im->minval + new_range;
500 ytr(im,DNAN); /* reset precalc */
501 /* make sure first minor gridline is on integer pixel y coord */
502 minor_y = gridstep * floor(im->minval / gridstep);
503 while (minor_y < im->minval)
504 minor_y += gridstep;
505 minor_y_px = ytr(im, minor_y) + im->ysize; /* ensure > 0 by adding ysize */
506 minor_y_px_frac = minor_y_px - floor(minor_y_px);
507 if (minor_y_px_frac > 0 && minor_y_px_frac < 1) {
508 double yfrac = minor_y_px_frac / im->ysize;
509 double range = im->maxval - im->minval;
510 im->minval = im->minval - yfrac * range;
511 im->maxval = im->maxval - yfrac * range;
512 ytr(im,DNAN); /* reset precalc */
513 }
514 calc_horizontal_grid(im); /* recalc with changed im->maxval */
515 }
516 }
518 /* reduce data reimplementation by Alex */
520 void
521 reduce_data(
522 enum cf_en cf, /* which consolidation function ?*/
523 unsigned long cur_step, /* step the data currently is in */
524 time_t *start, /* start, end and step as requested ... */
525 time_t *end, /* ... by the application will be ... */
526 unsigned long *step, /* ... adjusted to represent reality */
527 unsigned long *ds_cnt, /* number of data sources in file */
528 rrd_value_t **data) /* two dimensional array containing the data */
529 {
530 int i,reduce_factor = ceil((double)(*step) / (double)cur_step);
531 unsigned long col,dst_row,row_cnt,start_offset,end_offset,skiprows=0;
532 rrd_value_t *srcptr,*dstptr;
534 (*step) = cur_step*reduce_factor; /* set new step size for reduced data */
535 dstptr = *data;
536 srcptr = *data;
537 row_cnt = ((*end)-(*start))/cur_step;
539 #ifdef DEBUG
540 #define DEBUG_REDUCE
541 #endif
542 #ifdef DEBUG_REDUCE
543 printf("Reducing %lu rows with factor %i time %lu to %lu, step %lu\n",
544 row_cnt,reduce_factor,*start,*end,cur_step);
545 for (col=0;col<row_cnt;col++) {
546 printf("time %10lu: ",*start+(col+1)*cur_step);
547 for (i=0;i<*ds_cnt;i++)
548 printf(" %8.2e",srcptr[*ds_cnt*col+i]);
549 printf("\n");
550 }
551 #endif
553 /* We have to combine [reduce_factor] rows of the source
554 ** into one row for the destination. Doing this we also
555 ** need to take care to combine the correct rows. First
556 ** alter the start and end time so that they are multiples
557 ** of the new step time. We cannot reduce the amount of
558 ** time so we have to move the end towards the future and
559 ** the start towards the past.
560 */
561 end_offset = (*end) % (*step);
562 start_offset = (*start) % (*step);
564 /* If there is a start offset (which cannot be more than
565 ** one destination row), skip the appropriate number of
566 ** source rows and one destination row. The appropriate
567 ** number is what we do know (start_offset/cur_step) of
568 ** the new interval (*step/cur_step aka reduce_factor).
569 */
570 #ifdef DEBUG_REDUCE
571 printf("start_offset: %lu end_offset: %lu\n",start_offset,end_offset);
572 printf("row_cnt before: %lu\n",row_cnt);
573 #endif
574 if (start_offset) {
575 (*start) = (*start)-start_offset;
576 skiprows=reduce_factor-start_offset/cur_step;
577 srcptr+=skiprows* *ds_cnt;
578 for (col=0;col<(*ds_cnt);col++) *dstptr++ = DNAN;
579 row_cnt-=skiprows;
580 }
581 #ifdef DEBUG_REDUCE
582 printf("row_cnt between: %lu\n",row_cnt);
583 #endif
585 /* At the end we have some rows that are not going to be
586 ** used, the amount is end_offset/cur_step
587 */
588 if (end_offset) {
589 (*end) = (*end)-end_offset+(*step);
590 skiprows = end_offset/cur_step;
591 row_cnt-=skiprows;
592 }
593 #ifdef DEBUG_REDUCE
594 printf("row_cnt after: %lu\n",row_cnt);
595 #endif
597 /* Sanity check: row_cnt should be multiple of reduce_factor */
598 /* if this gets triggered, something is REALLY WRONG ... we die immediately */
600 if (row_cnt%reduce_factor) {
601 printf("SANITY CHECK: %lu rows cannot be reduced by %i \n",
602 row_cnt,reduce_factor);
603 printf("BUG in reduce_data()\n");
604 exit(1);
605 }
607 /* Now combine reduce_factor intervals at a time
608 ** into one interval for the destination.
609 */
611 for (dst_row=0;(long int)row_cnt>=reduce_factor;dst_row++) {
612 for (col=0;col<(*ds_cnt);col++) {
613 rrd_value_t newval=DNAN;
614 unsigned long validval=0;
616 for (i=0;i<reduce_factor;i++) {
617 if (isnan(srcptr[i*(*ds_cnt)+col])) {
618 continue;
619 }
620 validval++;
621 if (isnan(newval)) newval = srcptr[i*(*ds_cnt)+col];
622 else {
623 switch (cf) {
624 case CF_HWPREDICT:
625 case CF_DEVSEASONAL:
626 case CF_DEVPREDICT:
627 case CF_SEASONAL:
628 case CF_AVERAGE:
629 newval += srcptr[i*(*ds_cnt)+col];
630 break;
631 case CF_MINIMUM:
632 newval = min (newval,srcptr[i*(*ds_cnt)+col]);
633 break;
634 case CF_FAILURES:
635 /* an interval contains a failure if any subintervals contained a failure */
636 case CF_MAXIMUM:
637 newval = max (newval,srcptr[i*(*ds_cnt)+col]);
638 break;
639 case CF_LAST:
640 newval = srcptr[i*(*ds_cnt)+col];
641 break;
642 }
643 }
644 }
645 if (validval == 0){newval = DNAN;} else{
646 switch (cf) {
647 case CF_HWPREDICT:
648 case CF_DEVSEASONAL:
649 case CF_DEVPREDICT:
650 case CF_SEASONAL:
651 case CF_AVERAGE:
652 newval /= validval;
653 break;
654 case CF_MINIMUM:
655 case CF_FAILURES:
656 case CF_MAXIMUM:
657 case CF_LAST:
658 break;
659 }
660 }
661 *dstptr++=newval;
662 }
663 srcptr+=(*ds_cnt)*reduce_factor;
664 row_cnt-=reduce_factor;
665 }
666 /* If we had to alter the endtime, we didn't have enough
667 ** source rows to fill the last row. Fill it with NaN.
668 */
669 if (end_offset) for (col=0;col<(*ds_cnt);col++) *dstptr++ = DNAN;
670 #ifdef DEBUG_REDUCE
671 row_cnt = ((*end)-(*start))/ *step;
672 srcptr = *data;
673 printf("Done reducing. Currently %lu rows, time %lu to %lu, step %lu\n",
674 row_cnt,*start,*end,*step);
675 for (col=0;col<row_cnt;col++) {
676 printf("time %10lu: ",*start+(col+1)*(*step));
677 for (i=0;i<*ds_cnt;i++)
678 printf(" %8.2e",srcptr[*ds_cnt*col+i]);
679 printf("\n");
680 }
681 #endif
682 }
685 /* get the data required for the graphs from the
686 relevant rrds ... */
688 int
689 data_fetch(image_desc_t *im )
690 {
691 int i,ii;
692 int skip;
694 /* pull the data from the rrd files ... */
695 for (i=0;i< (int)im->gdes_c;i++){
696 /* only GF_DEF elements fetch data */
697 if (im->gdes[i].gf != GF_DEF)
698 continue;
700 skip=0;
701 /* do we have it already ?*/
702 for (ii=0;ii<i;ii++) {
703 if (im->gdes[ii].gf != GF_DEF)
704 continue;
705 if ((strcmp(im->gdes[i].rrd, im->gdes[ii].rrd) == 0)
706 && (im->gdes[i].cf == im->gdes[ii].cf)
707 && (im->gdes[i].cf_reduce == im->gdes[ii].cf_reduce)
708 && (im->gdes[i].start_orig == im->gdes[ii].start_orig)
709 && (im->gdes[i].end_orig == im->gdes[ii].end_orig)
710 && (im->gdes[i].step_orig == im->gdes[ii].step_orig)) {
711 /* OK, the data is already there.
712 ** Just copy the header portion
713 */
714 im->gdes[i].start = im->gdes[ii].start;
715 im->gdes[i].end = im->gdes[ii].end;
716 im->gdes[i].step = im->gdes[ii].step;
717 im->gdes[i].ds_cnt = im->gdes[ii].ds_cnt;
718 im->gdes[i].ds_namv = im->gdes[ii].ds_namv;
719 im->gdes[i].data = im->gdes[ii].data;
720 im->gdes[i].data_first = 0;
721 skip=1;
722 }
723 if (skip)
724 break;
725 }
726 if (! skip) {
727 unsigned long ft_step = im->gdes[i].step ;
729 if((rrd_fetch_fn(im->gdes[i].rrd,
730 im->gdes[i].cf,
731 &im->gdes[i].start,
732 &im->gdes[i].end,
733 &ft_step,
734 &im->gdes[i].ds_cnt,
735 &im->gdes[i].ds_namv,
736 &im->gdes[i].data)) == -1){
737 return -1;
738 }
739 im->gdes[i].data_first = 1;
740 im->gdes[i].step = im->step;
742 if (ft_step < im->gdes[i].step) {
743 reduce_data(im->gdes[i].cf_reduce,
744 ft_step,
745 &im->gdes[i].start,
746 &im->gdes[i].end,
747 &im->gdes[i].step,
748 &im->gdes[i].ds_cnt,
749 &im->gdes[i].data);
750 } else {
751 im->gdes[i].step = ft_step;
752 }
753 }
755 /* lets see if the required data source is really there */
756 for(ii=0;ii<(int)im->gdes[i].ds_cnt;ii++){
757 if(strcmp(im->gdes[i].ds_namv[ii],im->gdes[i].ds_nam) == 0){
758 im->gdes[i].ds=ii; }
759 }
760 if (im->gdes[i].ds== -1){
761 rrd_set_error("No DS called '%s' in '%s'",
762 im->gdes[i].ds_nam,im->gdes[i].rrd);
763 return -1;
764 }
766 }
767 return 0;
768 }
770 /* evaluate the expressions in the CDEF functions */
772 /*************************************************************
773 * CDEF stuff
774 *************************************************************/
776 long
777 find_var_wrapper(void *arg1, char *key)
778 {
779 return find_var((image_desc_t *) arg1, key);
780 }
782 /* find gdes containing var*/
783 long
784 find_var(image_desc_t *im, char *key){
785 long ii;
786 for(ii=0;ii<im->gdes_c-1;ii++){
787 if((im->gdes[ii].gf == GF_DEF
788 || im->gdes[ii].gf == GF_VDEF
789 || im->gdes[ii].gf == GF_CDEF)
790 && (strcmp(im->gdes[ii].vname,key) == 0)){
791 return ii;
792 }
793 }
794 return -1;
795 }
797 /* find the largest common denominator for all the numbers
798 in the 0 terminated num array */
799 long
800 lcd(long *num){
801 long rest;
802 int i;
803 for (i=0;num[i+1]!=0;i++){
804 do {
805 rest=num[i] % num[i+1];
806 num[i]=num[i+1]; num[i+1]=rest;
807 } while (rest!=0);
808 num[i+1] = num[i];
809 }
810 /* return i==0?num[i]:num[i-1]; */
811 return num[i];
812 }
814 /* run the rpn calculator on all the VDEF and CDEF arguments */
815 int
816 data_calc( image_desc_t *im){
818 int gdi;
819 int dataidx;
820 long *steparray, rpi;
821 int stepcnt;
822 time_t now;
823 rpnstack_t rpnstack;
825 rpnstack_init(&rpnstack);
827 for (gdi=0;gdi<im->gdes_c;gdi++){
828 /* Look for GF_VDEF and GF_CDEF in the same loop,
829 * so CDEFs can use VDEFs and vice versa
830 */
831 switch (im->gdes[gdi].gf) {
832 case GF_XPORT:
833 break;
834 case GF_SHIFT: {
835 graph_desc_t *vdp = &im->gdes[im->gdes[gdi].vidx];
837 /* remove current shift */
838 vdp->start -= vdp->shift;
839 vdp->end -= vdp->shift;
841 /* vdef */
842 if (im->gdes[gdi].shidx >= 0)
843 vdp->shift = im->gdes[im->gdes[gdi].shidx].vf.val;
844 /* constant */
845 else
846 vdp->shift = im->gdes[gdi].shval;
848 /* normalize shift to multiple of consolidated step */
849 vdp->shift = (vdp->shift / (long)vdp->step) * (long)vdp->step;
851 /* apply shift */
852 vdp->start += vdp->shift;
853 vdp->end += vdp->shift;
854 break;
855 }
856 case GF_VDEF:
857 /* A VDEF has no DS. This also signals other parts
858 * of rrdtool that this is a VDEF value, not a CDEF.
859 */
860 im->gdes[gdi].ds_cnt = 0;
861 if (vdef_calc(im,gdi)) {
862 rrd_set_error("Error processing VDEF '%s'"
863 ,im->gdes[gdi].vname
864 );
865 rpnstack_free(&rpnstack);
866 return -1;
867 }
868 break;
869 case GF_CDEF:
870 im->gdes[gdi].ds_cnt = 1;
871 im->gdes[gdi].ds = 0;
872 im->gdes[gdi].data_first = 1;
873 im->gdes[gdi].start = 0;
874 im->gdes[gdi].end = 0;
875 steparray=NULL;
876 stepcnt = 0;
877 dataidx=-1;
879 /* Find the variables in the expression.
880 * - VDEF variables are substituted by their values
881 * and the opcode is changed into OP_NUMBER.
882 * - CDEF variables are analized for their step size,
883 * the lowest common denominator of all the step
884 * sizes of the data sources involved is calculated
885 * and the resulting number is the step size for the
886 * resulting data source.
887 */
888 for(rpi=0;im->gdes[gdi].rpnp[rpi].op != OP_END;rpi++){
889 if(im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
890 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER){
891 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
892 if (im->gdes[ptr].ds_cnt == 0) { /* this is a VDEF data source */
893 #if 0
894 printf("DEBUG: inside CDEF '%s' processing VDEF '%s'\n",
895 im->gdes[gdi].vname,
896 im->gdes[ptr].vname);
897 printf("DEBUG: value from vdef is %f\n",im->gdes[ptr].vf.val);
898 #endif
899 im->gdes[gdi].rpnp[rpi].val = im->gdes[ptr].vf.val;
900 im->gdes[gdi].rpnp[rpi].op = OP_NUMBER;
901 } else { /* normal variables and PREF(variables) */
903 /* add one entry to the array that keeps track of the step sizes of the
904 * data sources going into the CDEF. */
905 if ((steparray =
906 rrd_realloc(steparray,
907 (++stepcnt+1)*sizeof(*steparray)))==NULL){
908 rrd_set_error("realloc steparray");
909 rpnstack_free(&rpnstack);
910 return -1;
911 };
913 steparray[stepcnt-1] = im->gdes[ptr].step;
915 /* adjust start and end of cdef (gdi) so
916 * that it runs from the latest start point
917 * to the earliest endpoint of any of the
918 * rras involved (ptr)
919 */
921 if(im->gdes[gdi].start < im->gdes[ptr].start)
922 im->gdes[gdi].start = im->gdes[ptr].start;
924 if(im->gdes[gdi].end == 0 ||
925 im->gdes[gdi].end > im->gdes[ptr].end)
926 im->gdes[gdi].end = im->gdes[ptr].end;
928 /* store pointer to the first element of
929 * the rra providing data for variable,
930 * further save step size and data source
931 * count of this rra
932 */
933 im->gdes[gdi].rpnp[rpi].data = im->gdes[ptr].data + im->gdes[ptr].ds;
934 im->gdes[gdi].rpnp[rpi].step = im->gdes[ptr].step;
935 im->gdes[gdi].rpnp[rpi].ds_cnt = im->gdes[ptr].ds_cnt;
937 /* backoff the *.data ptr; this is done so
938 * rpncalc() function doesn't have to treat
939 * the first case differently
940 */
941 } /* if ds_cnt != 0 */
942 } /* if OP_VARIABLE */
943 } /* loop through all rpi */
945 /* move the data pointers to the correct period */
946 for(rpi=0;im->gdes[gdi].rpnp[rpi].op != OP_END;rpi++){
947 if(im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
948 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER){
949 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
950 long diff = im->gdes[gdi].start - im->gdes[ptr].start;
952 if(diff > 0)
953 im->gdes[gdi].rpnp[rpi].data += (diff / im->gdes[ptr].step) * im->gdes[ptr].ds_cnt;
954 }
955 }
957 if(steparray == NULL){
958 rrd_set_error("rpn expressions without DEF"
959 " or CDEF variables are not supported");
960 rpnstack_free(&rpnstack);
961 return -1;
962 }
963 steparray[stepcnt]=0;
964 /* Now find the resulting step. All steps in all
965 * used RRAs have to be visited
966 */
967 im->gdes[gdi].step = lcd(steparray);
968 free(steparray);
969 if((im->gdes[gdi].data = malloc((
970 (im->gdes[gdi].end-im->gdes[gdi].start)
971 / im->gdes[gdi].step)
972 * sizeof(double)))==NULL){
973 rrd_set_error("malloc im->gdes[gdi].data");
974 rpnstack_free(&rpnstack);
975 return -1;
976 }
978 /* Step through the new cdef results array and
979 * calculate the values
980 */
981 for (now = im->gdes[gdi].start + im->gdes[gdi].step;
982 now<=im->gdes[gdi].end;
983 now += im->gdes[gdi].step)
984 {
985 rpnp_t *rpnp = im -> gdes[gdi].rpnp;
987 /* 3rd arg of rpn_calc is for OP_VARIABLE lookups;
988 * in this case we are advancing by timesteps;
989 * we use the fact that time_t is a synonym for long
990 */
991 if (rpn_calc(rpnp,&rpnstack,(long) now,
992 im->gdes[gdi].data,++dataidx) == -1) {
993 /* rpn_calc sets the error string */
994 rpnstack_free(&rpnstack);
995 return -1;
996 }
997 } /* enumerate over time steps within a CDEF */
998 break;
999 default:
1000 continue;
1001 }
1002 } /* enumerate over CDEFs */
1003 rpnstack_free(&rpnstack);
1004 return 0;
1005 }
1007 /* massage data so, that we get one value for each x coordinate in the graph */
1008 int
1009 data_proc( image_desc_t *im ){
1010 long i,ii;
1011 double pixstep = (double)(im->end-im->start)
1012 /(double)im->xsize; /* how much time
1013 passes in one pixel */
1014 double paintval;
1015 double minval=DNAN,maxval=DNAN;
1017 unsigned long gr_time;
1019 /* memory for the processed data */
1020 for(i=0;i<im->gdes_c;i++) {
1021 if((im->gdes[i].gf==GF_LINE) ||
1022 (im->gdes[i].gf==GF_AREA) ||
1023 (im->gdes[i].gf==GF_TICK)) {
1024 if((im->gdes[i].p_data = malloc((im->xsize +1)
1025 * sizeof(rrd_value_t)))==NULL){
1026 rrd_set_error("malloc data_proc");
1027 return -1;
1028 }
1029 }
1030 }
1032 for (i=0;i<im->xsize;i++) { /* for each pixel */
1033 long vidx;
1034 gr_time = im->start+pixstep*i; /* time of the current step */
1035 paintval=0.0;
1037 for (ii=0;ii<im->gdes_c;ii++) {
1038 double value;
1039 switch (im->gdes[ii].gf) {
1040 case GF_LINE:
1041 case GF_AREA:
1042 case GF_TICK:
1043 if (!im->gdes[ii].stack)
1044 paintval = 0.0;
1045 value = im->gdes[ii].yrule;
1046 if (isnan(value) || (im->gdes[ii].gf == GF_TICK)) {
1047 /* The time of the data doesn't necessarily match
1048 ** the time of the graph. Beware.
1049 */
1050 vidx = im->gdes[ii].vidx;
1051 if (im->gdes[vidx].gf == GF_VDEF) {
1052 value = im->gdes[vidx].vf.val;
1053 } else if (((long int)gr_time >= (long int)im->gdes[vidx].start) &&
1054 ((long int)gr_time <= (long int)im->gdes[vidx].end) ) {
1055 value = im->gdes[vidx].data[
1056 (unsigned long) floor(
1057 (double)(gr_time - im->gdes[vidx].start)
1058 / im->gdes[vidx].step)
1059 * im->gdes[vidx].ds_cnt
1060 + im->gdes[vidx].ds
1061 ];
1062 } else {
1063 value = DNAN;
1064 }
1065 };
1067 if (! isnan(value)) {
1068 paintval += value;
1069 im->gdes[ii].p_data[i] = paintval;
1070 /* GF_TICK: the data values are not
1071 ** relevant for min and max
1072 */
1073 if (finite(paintval) && im->gdes[ii].gf != GF_TICK ) {
1074 if (isnan(minval) || paintval < minval)
1075 minval = paintval;
1076 if (isnan(maxval) || paintval > maxval)
1077 maxval = paintval;
1078 }
1079 } else {
1080 im->gdes[ii].p_data[i] = DNAN;
1081 }
1082 break;
1083 case GF_STACK:
1084 rrd_set_error("STACK should already be turned into LINE or AREA here");
1085 return -1;
1086 break;
1087 default:
1088 break;
1089 }
1090 }
1091 }
1093 /* if min or max have not been asigned a value this is because
1094 there was no data in the graph ... this is not good ...
1095 lets set these to dummy values then ... */
1097 if (isnan(minval)) minval = 0.0;
1098 if (isnan(maxval)) maxval = 1.0;
1100 /* adjust min and max values */
1101 if (isnan(im->minval)
1102 /* don't adjust low-end with log scale */
1103 || ((!im->logarithmic && !im->rigid) && im->minval > minval)
1104 )
1105 im->minval = minval;
1106 if (isnan(im->maxval)
1107 || (!im->rigid && im->maxval < maxval)
1108 ) {
1109 if (im->logarithmic)
1110 im->maxval = maxval * 1.1;
1111 else
1112 im->maxval = maxval;
1113 }
1114 /* make sure min is smaller than max */
1115 if (im->minval > im->maxval) {
1116 im->minval = 0.99 * im->maxval;
1117 }
1119 /* make sure min and max are not equal */
1120 if (im->minval == im->maxval) {
1121 im->maxval *= 1.01;
1122 if (! im->logarithmic) {
1123 im->minval *= 0.99;
1124 }
1125 /* make sure min and max are not both zero */
1126 if (im->maxval == 0.0) {
1127 im->maxval = 1.0;
1128 }
1129 }
1130 return 0;
1131 }
1135 /* identify the point where the first gridline, label ... gets placed */
1137 time_t
1138 find_first_time(
1139 time_t start, /* what is the initial time */
1140 enum tmt_en baseint, /* what is the basic interval */
1141 long basestep /* how many if these do we jump a time */
1142 )
1143 {
1144 struct tm tm;
1145 localtime_r(&start, &tm);
1146 switch(baseint){
1147 case TMT_SECOND:
1148 tm.tm_sec -= tm.tm_sec % basestep; break;
1149 case TMT_MINUTE:
1150 tm.tm_sec=0;
1151 tm.tm_min -= tm.tm_min % basestep;
1152 break;
1153 case TMT_HOUR:
1154 tm.tm_sec=0;
1155 tm.tm_min = 0;
1156 tm.tm_hour -= tm.tm_hour % basestep; break;
1157 case TMT_DAY:
1158 /* we do NOT look at the basestep for this ... */
1159 tm.tm_sec=0;
1160 tm.tm_min = 0;
1161 tm.tm_hour = 0; break;
1162 case TMT_WEEK:
1163 /* we do NOT look at the basestep for this ... */
1164 tm.tm_sec=0;
1165 tm.tm_min = 0;
1166 tm.tm_hour = 0;
1167 tm.tm_mday -= tm.tm_wday -1; /* -1 because we want the monday */
1168 if (tm.tm_wday==0) tm.tm_mday -= 7; /* we want the *previous* monday */
1169 break;
1170 case TMT_MONTH:
1171 tm.tm_sec=0;
1172 tm.tm_min = 0;
1173 tm.tm_hour = 0;
1174 tm.tm_mday = 1;
1175 tm.tm_mon -= tm.tm_mon % basestep; break;
1177 case TMT_YEAR:
1178 tm.tm_sec=0;
1179 tm.tm_min = 0;
1180 tm.tm_hour = 0;
1181 tm.tm_mday = 1;
1182 tm.tm_mon = 0;
1183 tm.tm_year -= (tm.tm_year+1900) % basestep;
1185 }
1186 return mktime(&tm);
1187 }
1188 /* identify the point where the next gridline, label ... gets placed */
1189 time_t
1190 find_next_time(
1191 time_t current, /* what is the initial time */
1192 enum tmt_en baseint, /* what is the basic interval */
1193 long basestep /* how many if these do we jump a time */
1194 )
1195 {
1196 struct tm tm;
1197 time_t madetime;
1198 localtime_r(¤t, &tm);
1199 do {
1200 switch(baseint){
1201 case TMT_SECOND:
1202 tm.tm_sec += basestep; break;
1203 case TMT_MINUTE:
1204 tm.tm_min += basestep; break;
1205 case TMT_HOUR:
1206 tm.tm_hour += basestep; break;
1207 case TMT_DAY:
1208 tm.tm_mday += basestep; break;
1209 case TMT_WEEK:
1210 tm.tm_mday += 7*basestep; break;
1211 case TMT_MONTH:
1212 tm.tm_mon += basestep; break;
1213 case TMT_YEAR:
1214 tm.tm_year += basestep;
1215 }
1216 madetime = mktime(&tm);
1217 } while (madetime == -1); /* this is necessary to skip impssible times
1218 like the daylight saving time skips */
1219 return madetime;
1221 }
1224 /* calculate values required for PRINT and GPRINT functions */
1226 int
1227 print_calc(image_desc_t *im, char ***prdata)
1228 {
1229 long i,ii,validsteps;
1230 double printval;
1231 time_t printtime;
1232 int graphelement = 0;
1233 long vidx;
1234 int max_ii;
1235 double magfact = -1;
1236 char *si_symb = "";
1237 char *percent_s;
1238 int prlines = 1;
1239 if (im->imginfo) prlines++;
1240 for(i=0;i<im->gdes_c;i++){
1241 switch(im->gdes[i].gf){
1242 case GF_PRINT:
1243 prlines++;
1244 if(((*prdata) = rrd_realloc((*prdata),prlines*sizeof(char *)))==NULL){
1245 rrd_set_error("realloc prdata");
1246 return 0;
1247 }
1248 case GF_GPRINT:
1249 /* PRINT and GPRINT can now print VDEF generated values.
1250 * There's no need to do any calculations on them as these
1251 * calculations were already made.
1252 */
1253 vidx = im->gdes[i].vidx;
1254 if (im->gdes[vidx].gf==GF_VDEF) { /* simply use vals */
1255 printval = im->gdes[vidx].vf.val;
1256 printtime = im->gdes[vidx].vf.when;
1257 } else { /* need to calculate max,min,avg etcetera */
1258 max_ii =((im->gdes[vidx].end
1259 - im->gdes[vidx].start)
1260 / im->gdes[vidx].step
1261 * im->gdes[vidx].ds_cnt);
1262 printval = DNAN;
1263 validsteps = 0;
1264 for( ii=im->gdes[vidx].ds;
1265 ii < max_ii;
1266 ii+=im->gdes[vidx].ds_cnt){
1267 if (! finite(im->gdes[vidx].data[ii]))
1268 continue;
1269 if (isnan(printval)){
1270 printval = im->gdes[vidx].data[ii];
1271 validsteps++;
1272 continue;
1273 }
1275 switch (im->gdes[i].cf){
1276 case CF_HWPREDICT:
1277 case CF_DEVPREDICT:
1278 case CF_DEVSEASONAL:
1279 case CF_SEASONAL:
1280 case CF_AVERAGE:
1281 validsteps++;
1282 printval += im->gdes[vidx].data[ii];
1283 break;
1284 case CF_MINIMUM:
1285 printval = min( printval, im->gdes[vidx].data[ii]);
1286 break;
1287 case CF_FAILURES:
1288 case CF_MAXIMUM:
1289 printval = max( printval, im->gdes[vidx].data[ii]);
1290 break;
1291 case CF_LAST:
1292 printval = im->gdes[vidx].data[ii];
1293 }
1294 }
1295 if (im->gdes[i].cf==CF_AVERAGE || im->gdes[i].cf > CF_LAST) {
1296 if (validsteps > 1) {
1297 printval = (printval / validsteps);
1298 }
1299 }
1300 } /* prepare printval */
1302 if (!strcmp(im->gdes[i].format,"%c")) { /* VDEF time print */
1303 char ctime_buf[128]; /* PS: for ctime_r, must be >= 26 chars */
1304 int iii=0;
1305 ctime_r(&printtime,ctime_buf);
1306 while(isprint(ctime_buf[iii])){iii++;}
1307 ctime_buf[iii]='\0';
1308 if (im->gdes[i].gf == GF_PRINT){
1309 (*prdata)[prlines-2] = malloc((FMT_LEG_LEN+2)*sizeof(char));
1310 sprintf((*prdata)[prlines-2],"%s (%lu)",ctime_buf,printtime);
1311 (*prdata)[prlines-1] = NULL;
1312 } else {
1313 sprintf(im->gdes[i].legend,"%s (%lu)",ctime_buf,printtime);
1314 graphelement = 1;
1315 }
1316 } else {
1317 if ((percent_s = strstr(im->gdes[i].format,"%S")) != NULL) {
1318 /* Magfact is set to -1 upon entry to print_calc. If it
1319 * is still less than 0, then we need to run auto_scale.
1320 * Otherwise, put the value into the correct units. If
1321 * the value is 0, then do not set the symbol or magnification
1322 * so next the calculation will be performed again. */
1323 if (magfact < 0.0) {
1324 auto_scale(im,&printval,&si_symb,&magfact);
1325 if (printval == 0.0)
1326 magfact = -1.0;
1327 } else {
1328 printval /= magfact;
1329 }
1330 *(++percent_s) = 's';
1331 } else if (strstr(im->gdes[i].format,"%s") != NULL) {
1332 auto_scale(im,&printval,&si_symb,&magfact);
1333 }
1335 if (im->gdes[i].gf == GF_PRINT){
1336 (*prdata)[prlines-2] = malloc((FMT_LEG_LEN+2)*sizeof(char));
1337 (*prdata)[prlines-1] = NULL;
1338 if (bad_format(im->gdes[i].format)) {
1339 rrd_set_error("bad format for PRINT in '%s'", im->gdes[i].format);
1340 return -1;
1341 }
1342 #ifdef HAVE_SNPRINTF
1343 snprintf((*prdata)[prlines-2],FMT_LEG_LEN,im->gdes[i].format,printval,si_symb);
1344 #else
1345 sprintf((*prdata)[prlines-2],im->gdes[i].format,printval,si_symb);
1346 #endif
1347 } else {
1348 /* GF_GPRINT */
1350 if (bad_format(im->gdes[i].format)) {
1351 rrd_set_error("bad format for GPRINT in '%s'", im->gdes[i].format);
1352 return -1;
1353 }
1354 #ifdef HAVE_SNPRINTF
1355 snprintf(im->gdes[i].legend,FMT_LEG_LEN-2,im->gdes[i].format,printval,si_symb);
1356 #else
1357 sprintf(im->gdes[i].legend,im->gdes[i].format,printval,si_symb);
1358 #endif
1359 graphelement = 1;
1360 }
1361 }
1362 break;
1363 case GF_LINE:
1364 case GF_AREA:
1365 case GF_TICK:
1366 case GF_HRULE:
1367 case GF_VRULE:
1368 graphelement = 1;
1369 break;
1370 case GF_COMMENT:
1371 case GF_DEF:
1372 case GF_CDEF:
1373 case GF_VDEF:
1374 #ifdef WITH_PIECHART
1375 case GF_PART:
1376 #endif
1377 case GF_SHIFT:
1378 case GF_XPORT:
1379 break;
1380 case GF_STACK:
1381 rrd_set_error("STACK should already be turned into LINE or AREA here");
1382 return -1;
1383 break;
1384 }
1385 }
1386 return graphelement;
1387 }
1390 /* place legends with color spots */
1391 int
1392 leg_place(image_desc_t *im)
1393 {
1394 /* graph labels */
1395 int interleg = im->text_prop[TEXT_PROP_LEGEND].size*2.0;
1396 int border = im->text_prop[TEXT_PROP_LEGEND].size*2.0;
1397 int fill=0, fill_last;
1398 int leg_c = 0;
1399 int leg_x = border, leg_y = im->yimg;
1400 int leg_cc;
1401 int glue = 0;
1402 int i,ii, mark = 0;
1403 char prt_fctn; /*special printfunctions */
1404 int *legspace;
1406 if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
1407 if ((legspace = malloc(im->gdes_c*sizeof(int)))==NULL){
1408 rrd_set_error("malloc for legspace");
1409 return -1;
1410 }
1412 for(i=0;i<im->gdes_c;i++){
1413 fill_last = fill;
1415 /* hid legends for rules which are not displayed */
1417 if(!(im->extra_flags & FORCE_RULES_LEGEND)) {
1418 if (im->gdes[i].gf == GF_HRULE &&
1419 (im->gdes[i].yrule < im->minval || im->gdes[i].yrule > im->maxval))
1420 im->gdes[i].legend[0] = '\0';
1422 if (im->gdes[i].gf == GF_VRULE &&
1423 (im->gdes[i].xrule < im->start || im->gdes[i].xrule > im->end))
1424 im->gdes[i].legend[0] = '\0';
1425 }
1427 leg_cc = strlen(im->gdes[i].legend);
1429 /* is there a controle code ant the end of the legend string ? */
1430 /* and it is not a tab \\t */
1431 if (leg_cc >= 2 && im->gdes[i].legend[leg_cc-2] == '\\' && im->gdes[i].legend[leg_cc-1] != 't') {
1432 prt_fctn = im->gdes[i].legend[leg_cc-1];
1433 leg_cc -= 2;
1434 im->gdes[i].legend[leg_cc] = '\0';
1435 } else {
1436 prt_fctn = '\0';
1437 }
1438 /* remove exess space */
1439 while (prt_fctn=='g' &&
1440 leg_cc > 0 &&
1441 im->gdes[i].legend[leg_cc-1]==' '){
1442 leg_cc--;
1443 im->gdes[i].legend[leg_cc]='\0';
1444 }
1445 if (leg_cc != 0 ){
1446 legspace[i]=(prt_fctn=='g' ? 0 : interleg);
1448 if (fill > 0){
1449 /* no interleg space if string ends in \g */
1450 fill += legspace[i];
1451 }
1452 fill += gfx_get_text_width(im->canvas, fill+border,
1453 im->text_prop[TEXT_PROP_LEGEND].font,
1454 im->text_prop[TEXT_PROP_LEGEND].size,
1455 im->tabwidth,
1456 im->gdes[i].legend, 0);
1457 leg_c++;
1458 } else {
1459 legspace[i]=0;
1460 }
1461 /* who said there was a special tag ... ?*/
1462 if (prt_fctn=='g') {
1463 prt_fctn = '\0';
1464 }
1465 if (prt_fctn == '\0') {
1466 if (i == im->gdes_c -1 ) prt_fctn ='l';
1468 /* is it time to place the legends ? */
1469 if (fill > im->ximg - 2*border){
1470 if (leg_c > 1) {
1471 /* go back one */
1472 i--;
1473 fill = fill_last;
1474 leg_c--;
1475 prt_fctn = 'j';
1476 } else {
1477 prt_fctn = 'l';
1478 }
1480 }
1481 }
1484 if (prt_fctn != '\0'){
1485 leg_x = border;
1486 if (leg_c >= 2 && prt_fctn == 'j') {
1487 glue = (im->ximg - fill - 2* border) / (leg_c-1);
1488 } else {
1489 glue = 0;
1490 }
1491 if (prt_fctn =='c') leg_x = (im->ximg - fill) / 2.0;
1492 if (prt_fctn =='r') leg_x = im->ximg - fill - border;
1494 for(ii=mark;ii<=i;ii++){
1495 if(im->gdes[ii].legend[0]=='\0')
1496 continue; /* skip empty legends */
1497 im->gdes[ii].leg_x = leg_x;
1498 im->gdes[ii].leg_y = leg_y;
1499 leg_x +=
1500 gfx_get_text_width(im->canvas, leg_x,
1501 im->text_prop[TEXT_PROP_LEGEND].font,
1502 im->text_prop[TEXT_PROP_LEGEND].size,
1503 im->tabwidth,
1504 im->gdes[ii].legend, 0)
1505 + legspace[ii]
1506 + glue;
1507 }
1508 leg_y += im->text_prop[TEXT_PROP_LEGEND].size*1.8;
1509 if (prt_fctn == 's') leg_y -= im->text_prop[TEXT_PROP_LEGEND].size;
1510 fill = 0;
1511 leg_c = 0;
1512 mark = ii;
1513 }
1514 }
1515 im->yimg = leg_y;
1516 free(legspace);
1517 }
1518 return 0;
1519 }
1521 /* create a grid on the graph. it determines what to do
1522 from the values of xsize, start and end */
1524 /* the xaxis labels are determined from the number of seconds per pixel
1525 in the requested graph */
1529 int
1530 calc_horizontal_grid(image_desc_t *im)
1531 {
1532 double range;
1533 double scaledrange;
1534 int pixel,i;
1535 int gridind=0;
1536 int decimals, fractionals;
1538 im->ygrid_scale.labfact=2;
1539 range = im->maxval - im->minval;
1540 scaledrange = range / im->magfact;
1542 /* does the scale of this graph make it impossible to put lines
1543 on it? If so, give up. */
1544 if (isnan(scaledrange)) {
1545 return 0;
1546 }
1548 /* find grid spaceing */
1549 pixel=1;
1550 if(isnan(im->ygridstep)){
1551 if(im->extra_flags & ALTYGRID) {
1552 /* find the value with max number of digits. Get number of digits */
1553 decimals = ceil(log10(max(fabs(im->maxval), fabs(im->minval))*im->viewfactor/im->magfact));
1554 if(decimals <= 0) /* everything is small. make place for zero */
1555 decimals = 1;
1557 im->ygrid_scale.gridstep = pow((double)10, floor(log10(range*im->viewfactor/im->magfact)))/im->viewfactor*im->magfact;
1559 if(im->ygrid_scale.gridstep == 0) /* range is one -> 0.1 is reasonable scale */
1560 im->ygrid_scale.gridstep = 0.1;
1561 /* should have at least 5 lines but no more then 15 */
1562 if(range/im->ygrid_scale.gridstep < 5)
1563 im->ygrid_scale.gridstep /= 10;
1564 if(range/im->ygrid_scale.gridstep > 15)
1565 im->ygrid_scale.gridstep *= 10;
1566 if(range/im->ygrid_scale.gridstep > 5) {
1567 im->ygrid_scale.labfact = 1;
1568 if(range/im->ygrid_scale.gridstep > 8)
1569 im->ygrid_scale.labfact = 2;
1570 }
1571 else {
1572 im->ygrid_scale.gridstep /= 5;
1573 im->ygrid_scale.labfact = 5;
1574 }
1575 fractionals = floor(log10(im->ygrid_scale.gridstep*(double)im->ygrid_scale.labfact*im->viewfactor/im->magfact));
1576 if(fractionals < 0) { /* small amplitude. */
1577 int len = decimals - fractionals + 1;
1578 if (im->unitslength < len+2) im->unitslength = len+2;
1579 sprintf(im->ygrid_scale.labfmt, "%%%d.%df%s", len, -fractionals,(im->symbol != ' ' ? " %c" : ""));
1580 } else {
1581 int len = decimals + 1;
1582 if (im->unitslength < len+2) im->unitslength = len+2;
1583 sprintf(im->ygrid_scale.labfmt, "%%%d.0f%s", len, ( im->symbol != ' ' ? " %c" : "" ));
1584 }
1585 }
1586 else {
1587 for(i=0;ylab[i].grid > 0;i++){
1588 pixel = im->ysize / (scaledrange / ylab[i].grid);
1589 gridind = i;
1590 if (pixel > 7)
1591 break;
1592 }
1594 for(i=0; i<4;i++) {
1595 if (pixel * ylab[gridind].lfac[i] >= 2.5 * im->text_prop[TEXT_PROP_AXIS].size) {
1596 im->ygrid_scale.labfact = ylab[gridind].lfac[i];
1597 break;
1598 }
1599 }
1601 im->ygrid_scale.gridstep = ylab[gridind].grid * im->magfact;
1602 }
1603 } else {
1604 im->ygrid_scale.gridstep = im->ygridstep;
1605 im->ygrid_scale.labfact = im->ylabfact;
1606 }
1607 return 1;
1608 }
1610 int draw_horizontal_grid(image_desc_t *im)
1611 {
1612 int i;
1613 double scaledstep;
1614 char graph_label[100];
1615 int nlabels=0;
1616 double X0=im->xorigin;
1617 double X1=im->xorigin+im->xsize;
1619 int sgrid = (int)( im->minval / im->ygrid_scale.gridstep - 1);
1620 int egrid = (int)( im->maxval / im->ygrid_scale.gridstep + 1);
1621 double MaxY;
1622 scaledstep = im->ygrid_scale.gridstep/(double)im->magfact*(double)im->viewfactor;
1623 MaxY = scaledstep*(double)egrid;
1624 for (i = sgrid; i <= egrid; i++){
1625 double Y0=ytr(im,im->ygrid_scale.gridstep*i);
1626 double YN=ytr(im,im->ygrid_scale.gridstep*(i+1));
1627 if ( Y0 >= im->yorigin-im->ysize
1628 && Y0 <= im->yorigin){
1629 /* Make sure at least 2 grid labels are shown, even if it doesn't agree
1630 with the chosen settings. Add a label if required by settings, or if
1631 there is only one label so far and the next grid line is out of bounds. */
1632 if(i % im->ygrid_scale.labfact == 0 || ( nlabels==1 && (YN < im->yorigin-im->ysize || YN > im->yorigin) )){
1633 if (im->symbol == ' ') {
1634 if(im->extra_flags & ALTYGRID) {
1635 sprintf(graph_label,im->ygrid_scale.labfmt,scaledstep*(double)i);
1636 } else {
1637 if(MaxY < 10) {
1638 sprintf(graph_label,"%4.1f",scaledstep*(double)i);
1639 } else {
1640 sprintf(graph_label,"%4.0f",scaledstep*(double)i);
1641 }
1642 }
1643 }else {
1644 char sisym = ( i == 0 ? ' ' : im->symbol);
1645 if(im->extra_flags & ALTYGRID) {
1646 sprintf(graph_label,im->ygrid_scale.labfmt,scaledstep*(double)i,sisym);
1647 } else {
1648 if(MaxY < 10){
1649 sprintf(graph_label,"%4.1f %c",scaledstep*(double)i, sisym);
1650 } else {
1651 sprintf(graph_label,"%4.0f %c",scaledstep*(double)i, sisym);
1652 }
1653 }
1654 }
1655 nlabels++;
1657 gfx_new_text ( im->canvas,
1658 X0-im->text_prop[TEXT_PROP_AXIS].size, Y0,
1659 im->graph_col[GRC_FONT],
1660 im->text_prop[TEXT_PROP_AXIS].font,
1661 im->text_prop[TEXT_PROP_AXIS].size,
1662 im->tabwidth, 0.0, GFX_H_RIGHT, GFX_V_CENTER,
1663 graph_label );
1664 gfx_new_dashed_line ( im->canvas,
1665 X0-2,Y0,
1666 X1+2,Y0,
1667 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1668 im->grid_dash_on, im->grid_dash_off);
1670 } else if (!(im->extra_flags & NOMINOR)) {
1671 gfx_new_dashed_line ( im->canvas,
1672 X0-1,Y0,
1673 X1+1,Y0,
1674 GRIDWIDTH, im->graph_col[GRC_GRID],
1675 im->grid_dash_on, im->grid_dash_off);
1677 }
1678 }
1679 }
1680 return 1;
1681 }
1683 /* logaritmic horizontal grid */
1684 int
1685 horizontal_log_grid(image_desc_t *im)
1686 {
1687 double pixpex;
1688 int ii,i;
1689 int minoridx=0, majoridx=0;
1690 char graph_label[100];
1691 double X0,X1,Y0;
1692 double value, pixperstep, minstep;
1694 /* find grid spaceing */
1695 pixpex= (double)im->ysize / (log10(im->maxval) - log10(im->minval));
1697 if (isnan(pixpex)) {
1698 return 0;
1699 }
1701 for(i=0;yloglab[i][0] > 0;i++){
1702 minstep = log10(yloglab[i][0]);
1703 for(ii=1;yloglab[i][ii+1] > 0;ii++){
1704 if(yloglab[i][ii+2]==0){
1705 minstep = log10(yloglab[i][ii+1])-log10(yloglab[i][ii]);
1706 break;
1707 }
1708 }
1709 pixperstep = pixpex * minstep;
1710 if(pixperstep > 5){minoridx = i;}
1711 if(pixperstep > 2 * im->text_prop[TEXT_PROP_LEGEND].size){majoridx = i;}
1712 }
1714 X0=im->xorigin;
1715 X1=im->xorigin+im->xsize;
1716 /* paint minor grid */
1717 for (value = pow((double)10, log10(im->minval)
1718 - fmod(log10(im->minval),log10(yloglab[minoridx][0])));
1719 value <= im->maxval;
1720 value *= yloglab[minoridx][0]){
1721 if (value < im->minval) continue;
1722 i=0;
1723 while(yloglab[minoridx][++i] > 0){
1724 Y0 = ytr(im,value * yloglab[minoridx][i]);
1725 if (Y0 <= im->yorigin - im->ysize) break;
1726 gfx_new_dashed_line ( im->canvas,
1727 X0-1,Y0,
1728 X1+1,Y0,
1729 GRIDWIDTH, im->graph_col[GRC_GRID],
1730 im->grid_dash_on, im->grid_dash_off);
1731 }
1732 }
1734 /* paint major grid and labels*/
1735 for (value = pow((double)10, log10(im->minval)
1736 - fmod(log10(im->minval),log10(yloglab[majoridx][0])));
1737 value <= im->maxval;
1738 value *= yloglab[majoridx][0]){
1739 if (value < im->minval) continue;
1740 i=0;
1741 while(yloglab[majoridx][++i] > 0){
1742 Y0 = ytr(im,value * yloglab[majoridx][i]);
1743 if (Y0 <= im->yorigin - im->ysize) break;
1744 gfx_new_dashed_line ( im->canvas,
1745 X0-2,Y0,
1746 X1+2,Y0,
1747 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1748 im->grid_dash_on, im->grid_dash_off);
1750 sprintf(graph_label,"%3.0e",value * yloglab[majoridx][i]);
1751 gfx_new_text ( im->canvas,
1752 X0-im->text_prop[TEXT_PROP_AXIS].size, Y0,
1753 im->graph_col[GRC_FONT],
1754 im->text_prop[TEXT_PROP_AXIS].font,
1755 im->text_prop[TEXT_PROP_AXIS].size,
1756 im->tabwidth,0.0, GFX_H_RIGHT, GFX_V_CENTER,
1757 graph_label );
1758 }
1759 }
1760 return 1;
1761 }
1764 void
1765 vertical_grid(
1766 image_desc_t *im )
1767 {
1768 int xlab_sel; /* which sort of label and grid ? */
1769 time_t ti, tilab, timajor;
1770 long factor;
1771 char graph_label[100];
1772 double X0,Y0,Y1; /* points for filled graph and more*/
1773 struct tm tm;
1775 /* the type of time grid is determined by finding
1776 the number of seconds per pixel in the graph */
1779 if(im->xlab_user.minsec == -1){
1780 factor=(im->end - im->start)/im->xsize;
1781 xlab_sel=0;
1782 while ( xlab[xlab_sel+1].minsec != -1
1783 && xlab[xlab_sel+1].minsec <= factor) { xlab_sel++; } /* pick the last one */
1784 while ( xlab[xlab_sel-1].minsec == xlab[xlab_sel].minsec
1785 && xlab[xlab_sel].length > (im->end - im->start)) { xlab_sel--; } /* go back to the smallest size */
1786 im->xlab_user.gridtm = xlab[xlab_sel].gridtm;
1787 im->xlab_user.gridst = xlab[xlab_sel].gridst;
1788 im->xlab_user.mgridtm = xlab[xlab_sel].mgridtm;
1789 im->xlab_user.mgridst = xlab[xlab_sel].mgridst;
1790 im->xlab_user.labtm = xlab[xlab_sel].labtm;
1791 im->xlab_user.labst = xlab[xlab_sel].labst;
1792 im->xlab_user.precis = xlab[xlab_sel].precis;
1793 im->xlab_user.stst = xlab[xlab_sel].stst;
1794 }
1796 /* y coords are the same for every line ... */
1797 Y0 = im->yorigin;
1798 Y1 = im->yorigin-im->ysize;
1801 /* paint the minor grid */
1802 if (!(im->extra_flags & NOMINOR))
1803 {
1804 for(ti = find_first_time(im->start,
1805 im->xlab_user.gridtm,
1806 im->xlab_user.gridst),
1807 timajor = find_first_time(im->start,
1808 im->xlab_user.mgridtm,
1809 im->xlab_user.mgridst);
1810 ti < im->end;
1811 ti = find_next_time(ti,im->xlab_user.gridtm,im->xlab_user.gridst)
1812 ){
1813 /* are we inside the graph ? */
1814 if (ti < im->start || ti > im->end) continue;
1815 while (timajor < ti) {
1816 timajor = find_next_time(timajor,
1817 im->xlab_user.mgridtm, im->xlab_user.mgridst);
1818 }
1819 if (ti == timajor) continue; /* skip as falls on major grid line */
1820 X0 = xtr(im,ti);
1821 gfx_new_dashed_line(im->canvas,X0,Y0+1, X0,Y1-1,GRIDWIDTH,
1822 im->graph_col[GRC_GRID],
1823 im->grid_dash_on, im->grid_dash_off);
1825 }
1826 }
1828 /* paint the major grid */
1829 for(ti = find_first_time(im->start,
1830 im->xlab_user.mgridtm,
1831 im->xlab_user.mgridst);
1832 ti < im->end;
1833 ti = find_next_time(ti,im->xlab_user.mgridtm,im->xlab_user.mgridst)
1834 ){
1835 /* are we inside the graph ? */
1836 if (ti < im->start || ti > im->end) continue;
1837 X0 = xtr(im,ti);
1838 gfx_new_dashed_line(im->canvas,X0,Y0+3, X0,Y1-2,MGRIDWIDTH,
1839 im->graph_col[GRC_MGRID],
1840 im->grid_dash_on, im->grid_dash_off);
1842 }
1843 /* paint the labels below the graph */
1844 for(ti = find_first_time(im->start - im->xlab_user.precis/2,
1845 im->xlab_user.labtm,
1846 im->xlab_user.labst);
1847 ti <= im->end - im->xlab_user.precis/2;
1848 ti = find_next_time(ti,im->xlab_user.labtm,im->xlab_user.labst)
1849 ){
1850 tilab= ti + im->xlab_user.precis/2; /* correct time for the label */
1851 /* are we inside the graph ? */
1852 if (tilab < im->start || tilab > im->end) continue;
1854 #if HAVE_STRFTIME
1855 localtime_r(&tilab, &tm);
1856 strftime(graph_label,99,im->xlab_user.stst, &tm);
1857 #else
1858 # error "your libc has no strftime I guess we'll abort the exercise here."
1859 #endif
1860 gfx_new_text ( im->canvas,
1861 xtr(im,tilab), Y0+im->text_prop[TEXT_PROP_AXIS].size*1.4+5,
1862 im->graph_col[GRC_FONT],
1863 im->text_prop[TEXT_PROP_AXIS].font,
1864 im->text_prop[TEXT_PROP_AXIS].size,
1865 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_BOTTOM,
1866 graph_label );
1868 }
1870 }
1873 void
1874 axis_paint(
1875 image_desc_t *im
1876 )
1877 {
1878 /* draw x and y axis */
1879 /* gfx_new_line ( im->canvas, im->xorigin+im->xsize,im->yorigin,
1880 im->xorigin+im->xsize,im->yorigin-im->ysize,
1881 GRIDWIDTH, im->graph_col[GRC_AXIS]);
1883 gfx_new_line ( im->canvas, im->xorigin,im->yorigin-im->ysize,
1884 im->xorigin+im->xsize,im->yorigin-im->ysize,
1885 GRIDWIDTH, im->graph_col[GRC_AXIS]); */
1887 gfx_new_line ( im->canvas, im->xorigin-4,im->yorigin,
1888 im->xorigin+im->xsize+4,im->yorigin,
1889 MGRIDWIDTH, im->graph_col[GRC_AXIS]);
1891 gfx_new_line ( im->canvas, im->xorigin,im->yorigin+4,
1892 im->xorigin,im->yorigin-im->ysize-4,
1893 MGRIDWIDTH, im->graph_col[GRC_AXIS]);
1896 /* arrow for X and Y axis direction */
1897 gfx_new_area ( im->canvas,
1898 im->xorigin+im->xsize+2, im->yorigin-2,
1899 im->xorigin+im->xsize+2, im->yorigin+3,
1900 im->xorigin+im->xsize+7, im->yorigin+0.5, /* LINEOFFSET */
1901 im->graph_col[GRC_ARROW]);
1903 gfx_new_area ( im->canvas,
1904 im->xorigin-2, im->yorigin-im->ysize-2,
1905 im->xorigin+3, im->yorigin-im->ysize-2,
1906 im->xorigin+0.5, im->yorigin-im->ysize-7, /* LINEOFFSET */
1907 im->graph_col[GRC_ARROW]);
1909 }
1911 void
1912 grid_paint(image_desc_t *im)
1913 {
1914 long i;
1915 int res=0;
1916 double X0,Y0; /* points for filled graph and more*/
1917 gfx_node_t *node;
1919 /* draw 3d border */
1920 node = gfx_new_area (im->canvas, 0,im->yimg,
1921 2,im->yimg-2,
1922 2,2,im->graph_col[GRC_SHADEA]);
1923 gfx_add_point( node , im->ximg - 2, 2 );
1924 gfx_add_point( node , im->ximg, 0 );
1925 gfx_add_point( node , 0,0 );
1926 /* gfx_add_point( node , 0,im->yimg ); */
1928 node = gfx_new_area (im->canvas, 2,im->yimg-2,
1929 im->ximg-2,im->yimg-2,
1930 im->ximg - 2, 2,
1931 im->graph_col[GRC_SHADEB]);
1932 gfx_add_point( node , im->ximg,0);
1933 gfx_add_point( node , im->ximg,im->yimg);
1934 gfx_add_point( node , 0,im->yimg);
1935 /* gfx_add_point( node , 0,im->yimg ); */
1938 if (im->draw_x_grid == 1 )
1939 vertical_grid(im);
1941 if (im->draw_y_grid == 1){
1942 if(im->logarithmic){
1943 res = horizontal_log_grid(im);
1944 } else {
1945 res = draw_horizontal_grid(im);
1946 }
1948 /* dont draw horizontal grid if there is no min and max val */
1949 if (! res ) {
1950 char *nodata = "No Data found";
1951 gfx_new_text(im->canvas,im->ximg/2, (2*im->yorigin-im->ysize) / 2,
1952 im->graph_col[GRC_FONT],
1953 im->text_prop[TEXT_PROP_AXIS].font,
1954 im->text_prop[TEXT_PROP_AXIS].size,
1955 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_CENTER,
1956 nodata );
1957 }
1958 }
1960 /* yaxis unit description */
1961 gfx_new_text( im->canvas,
1962 10, (im->yorigin - im->ysize/2),
1963 im->graph_col[GRC_FONT],
1964 im->text_prop[TEXT_PROP_UNIT].font,
1965 im->text_prop[TEXT_PROP_UNIT].size, im->tabwidth,
1966 RRDGRAPH_YLEGEND_ANGLE,
1967 GFX_H_LEFT, GFX_V_CENTER,
1968 im->ylegend);
1970 /* graph title */
1971 gfx_new_text( im->canvas,
1972 im->ximg/2, im->text_prop[TEXT_PROP_TITLE].size*1.3+4,
1973 im->graph_col[GRC_FONT],
1974 im->text_prop[TEXT_PROP_TITLE].font,
1975 im->text_prop[TEXT_PROP_TITLE].size, im->tabwidth, 0.0,
1976 GFX_H_CENTER, GFX_V_CENTER,
1977 im->title);
1978 /* rrdtool 'logo' */
1979 gfx_new_text( im->canvas,
1980 im->ximg-7, 7,
1981 ( im->graph_col[GRC_FONT] & 0xffffff00 ) | 0x00000044,
1982 im->text_prop[TEXT_PROP_AXIS].font,
1983 5.5, im->tabwidth, 270,
1984 GFX_H_RIGHT, GFX_V_TOP,
1985 "RRDTOOL / TOBI OETIKER");
1987 /* graph watermark */
1988 if(im->watermark[0] != '\0') {
1989 gfx_new_text( im->canvas,
1990 im->ximg/2, im->yimg-6,
1991 ( im->graph_col[GRC_FONT] & 0xffffff00 ) | 0x00000044,
1992 im->text_prop[TEXT_PROP_AXIS].font,
1993 5.5, im->tabwidth, 0,
1994 GFX_H_CENTER, GFX_V_BOTTOM,
1995 im->watermark);
1996 }
1998 /* graph labels */
1999 if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
2000 for(i=0;i<im->gdes_c;i++){
2001 if(im->gdes[i].legend[0] =='\0')
2002 continue;
2004 /* im->gdes[i].leg_y is the bottom of the legend */
2005 X0 = im->gdes[i].leg_x;
2006 Y0 = im->gdes[i].leg_y;
2007 gfx_new_text ( im->canvas, X0, Y0,
2008 im->graph_col[GRC_FONT],
2009 im->text_prop[TEXT_PROP_LEGEND].font,
2010 im->text_prop[TEXT_PROP_LEGEND].size,
2011 im->tabwidth,0.0, GFX_H_LEFT, GFX_V_BOTTOM,
2012 im->gdes[i].legend );
2013 /* The legend for GRAPH items starts with "M " to have
2014 enough space for the box */
2015 if ( im->gdes[i].gf != GF_PRINT &&
2016 im->gdes[i].gf != GF_GPRINT &&
2017 im->gdes[i].gf != GF_COMMENT) {
2018 int boxH, boxV;
2020 boxH = gfx_get_text_width(im->canvas, 0,
2021 im->text_prop[TEXT_PROP_LEGEND].font,
2022 im->text_prop[TEXT_PROP_LEGEND].size,
2023 im->tabwidth,"o", 0) * 1.2;
2024 boxV = boxH*1.1;
2026 /* make sure transparent colors show up the same way as in the graph */
2027 node = gfx_new_area(im->canvas,
2028 X0,Y0-boxV,
2029 X0,Y0,
2030 X0+boxH,Y0,
2031 im->graph_col[GRC_BACK]);
2032 gfx_add_point ( node, X0+boxH, Y0-boxV );
2034 node = gfx_new_area(im->canvas,
2035 X0,Y0-boxV,
2036 X0,Y0,
2037 X0+boxH,Y0,
2038 im->gdes[i].col);
2039 gfx_add_point ( node, X0+boxH, Y0-boxV );
2040 node = gfx_new_line(im->canvas,
2041 X0,Y0-boxV,
2042 X0,Y0,
2043 1.0,im->graph_col[GRC_FRAME]);
2044 gfx_add_point(node,X0+boxH,Y0);
2045 gfx_add_point(node,X0+boxH,Y0-boxV);
2046 gfx_close_path(node);
2047 }
2048 }
2049 }
2050 }
2053 /*****************************************************
2054 * lazy check make sure we rely need to create this graph
2055 *****************************************************/
2057 int lazy_check(image_desc_t *im){
2058 FILE *fd = NULL;
2059 int size = 1;
2060 struct stat imgstat;
2062 if (im->lazy == 0) return 0; /* no lazy option */
2063 if (stat(im->graphfile,&imgstat) != 0)
2064 return 0; /* can't stat */
2065 /* one pixel in the existing graph is more then what we would
2066 change here ... */
2067 if (time(NULL) - imgstat.st_mtime >
2068 (im->end - im->start) / im->xsize)
2069 return 0;
2070 if ((fd = fopen(im->graphfile,"rb")) == NULL)
2071 return 0; /* the file does not exist */
2072 switch (im->canvas->imgformat) {
2073 case IF_PNG:
2074 size = PngSize(fd,&(im->ximg),&(im->yimg));
2075 break;
2076 default:
2077 size = 1;
2078 }
2079 fclose(fd);
2080 return size;
2081 }
2083 #ifdef WITH_PIECHART
2084 void
2085 pie_part(image_desc_t *im, gfx_color_t color,
2086 double PieCenterX, double PieCenterY, double Radius,
2087 double startangle, double endangle)
2088 {
2089 gfx_node_t *node;
2090 double angle;
2091 double step=M_PI/50; /* Number of iterations for the circle;
2092 ** 10 is definitely too low, more than
2093 ** 50 seems to be overkill
2094 */
2096 /* Strange but true: we have to work clockwise or else
2097 ** anti aliasing nor transparency don't work.
2098 **
2099 ** This test is here to make sure we do it right, also
2100 ** this makes the for...next loop more easy to implement.
2101 ** The return will occur if the user enters a negative number
2102 ** (which shouldn't be done according to the specs) or if the
2103 ** programmers do something wrong (which, as we all know, never
2104 ** happens anyway :)
2105 */
2106 if (endangle<startangle) return;
2108 /* Hidden feature: Radius decreases each full circle */
2109 angle=startangle;
2110 while (angle>=2*M_PI) {
2111 angle -= 2*M_PI;
2112 Radius *= 0.8;
2113 }
2115 node=gfx_new_area(im->canvas,
2116 PieCenterX+sin(startangle)*Radius,
2117 PieCenterY-cos(startangle)*Radius,
2118 PieCenterX,
2119 PieCenterY,
2120 PieCenterX+sin(endangle)*Radius,
2121 PieCenterY-cos(endangle)*Radius,
2122 color);
2123 for (angle=endangle;angle-startangle>=step;angle-=step) {
2124 gfx_add_point(node,
2125 PieCenterX+sin(angle)*Radius,
2126 PieCenterY-cos(angle)*Radius );
2127 }
2128 }
2130 #endif
2132 int
2133 graph_size_location(image_desc_t *im, int elements
2135 #ifdef WITH_PIECHART
2136 , int piechart
2137 #endif
2139 )
2140 {
2141 /* The actual size of the image to draw is determined from
2142 ** several sources. The size given on the command line is
2143 ** the graph area but we need more as we have to draw labels
2144 ** and other things outside the graph area
2145 */
2147 /* +-+-------------------------------------------+
2148 ** |l|.................title.....................|
2149 ** |e+--+-------------------------------+--------+
2150 ** |b| b| | |
2151 ** |a| a| | pie |
2152 ** |l| l| main graph area | chart |
2153 ** |.| .| | area |
2154 ** |t| y| | |
2155 ** |r+--+-------------------------------+--------+
2156 ** |e| | x-axis labels | |
2157 ** |v+--+-------------------------------+--------+
2158 ** | |..............legends......................|
2159 ** +-+-------------------------------------------+
2160 ** | watermark |
2161 ** +---------------------------------------------+
2162 */
2163 int Xvertical=0,
2164 Ytitle =0,
2165 Xylabel =0,
2166 Xmain =0, Ymain =0,
2167 #ifdef WITH_PIECHART
2168 Xpie =0, Ypie =0,
2169 #endif
2170 Yxlabel =0,
2171 #if 0
2172 Xlegend =0, Ylegend =0,
2173 #endif
2174 Xspacing =15, Yspacing =15,
2176 Ywatermark =4;
2178 if (im->extra_flags & ONLY_GRAPH) {
2179 im->xorigin =0;
2180 im->ximg = im->xsize;
2181 im->yimg = im->ysize;
2182 im->yorigin = im->ysize;
2183 ytr(im,DNAN);
2184 return 0;
2185 }
2187 if (im->ylegend[0] != '\0' ) {
2188 Xvertical = im->text_prop[TEXT_PROP_UNIT].size *2;
2189 }
2192 if (im->title[0] != '\0') {
2193 /* The title is placed "inbetween" two text lines so it
2194 ** automatically has some vertical spacing. The horizontal
2195 ** spacing is added here, on each side.
2196 */
2197 /* don't care for the with of the title
2198 Xtitle = gfx_get_text_width(im->canvas, 0,
2199 im->text_prop[TEXT_PROP_TITLE].font,
2200 im->text_prop[TEXT_PROP_TITLE].size,
2201 im->tabwidth,
2202 im->title, 0) + 2*Xspacing; */
2203 Ytitle = im->text_prop[TEXT_PROP_TITLE].size*2.6+10;
2204 }
2206 if (elements) {
2207 Xmain=im->xsize;
2208 Ymain=im->ysize;
2209 if (im->draw_x_grid) {
2210 Yxlabel=im->text_prop[TEXT_PROP_AXIS].size *2.5;
2211 }
2212 if (im->draw_y_grid) {
2213 Xylabel=gfx_get_text_width(im->canvas, 0,
2214 im->text_prop[TEXT_PROP_AXIS].font,
2215 im->text_prop[TEXT_PROP_AXIS].size,
2216 im->tabwidth,
2217 "0", 0) * im->unitslength;
2218 }
2219 }
2221 #ifdef WITH_PIECHART
2222 if (piechart) {
2223 im->piesize=im->xsize<im->ysize?im->xsize:im->ysize;
2224 Xpie=im->piesize;
2225 Ypie=im->piesize;
2226 }
2227 #endif
2229 /* Now calculate the total size. Insert some spacing where
2230 desired. im->xorigin and im->yorigin need to correspond
2231 with the lower left corner of the main graph area or, if
2232 this one is not set, the imaginary box surrounding the
2233 pie chart area. */
2235 /* The legend width cannot yet be determined, as a result we
2236 ** have problems adjusting the image to it. For now, we just
2237 ** forget about it at all; the legend will have to fit in the
2238 ** size already allocated.
2239 */
2240 im->ximg = Xylabel + Xmain + 2 * Xspacing;
2242 #ifdef WITH_PIECHART
2243 im->ximg += Xpie;
2244 #endif
2246 if (Xmain) im->ximg += Xspacing;
2247 #ifdef WITH_PIECHART
2248 if (Xpie) im->ximg += Xspacing;
2249 #endif
2251 im->xorigin = Xspacing + Xylabel;
2253 /* the length of the title should not influence with width of the graph
2254 if (Xtitle > im->ximg) im->ximg = Xtitle; */
2256 if (Xvertical) { /* unit description */
2257 im->ximg += Xvertical;
2258 im->xorigin += Xvertical;
2259 }
2260 xtr(im,0);
2262 /* The vertical size is interesting... we need to compare
2263 ** the sum of {Ytitle, Ymain, Yxlabel, Ylegend, Ywatermark} with
2264 ** Yvertical however we need to know {Ytitle+Ymain+Yxlabel}
2265 ** in order to start even thinking about Ylegend or Ywatermark.
2266 **
2267 ** Do it in three portions: First calculate the inner part,
2268 ** then do the legend, then adjust the total height of the img,
2269 ** adding space for a watermark if one exists;
2270 */
2272 /* reserve space for main and/or pie */
2274 im->yimg = Ymain + Yxlabel;
2276 #ifdef WITH_PIECHART
2277 if (im->yimg < Ypie) im->yimg = Ypie;
2278 #endif
2280 im->yorigin = im->yimg - Yxlabel;
2282 /* reserve space for the title *or* some padding above the graph */
2283 if (Ytitle) {
2284 im->yimg += Ytitle;
2285 im->yorigin += Ytitle;
2286 } else {
2287 im->yimg += 1.5*Yspacing;
2288 im->yorigin += 1.5*Yspacing;
2289 }
2290 /* reserve space for padding below the graph */
2291 im->yimg += Yspacing;
2293 /* Determine where to place the legends onto the image.
2294 ** Adjust im->yimg to match the space requirements.
2295 */
2296 if(leg_place(im)==-1)
2297 return -1;
2299 if (im->watermark[0] != '\0') {
2300 im->yimg += Ywatermark;
2301 }
2303 #if 0
2304 if (Xlegend > im->ximg) {
2305 im->ximg = Xlegend;
2306 /* reposition Pie */
2307 }
2308 #endif
2310 #ifdef WITH_PIECHART
2311 /* The pie is placed in the upper right hand corner,
2312 ** just below the title (if any) and with sufficient
2313 ** padding.
2314 */
2315 if (elements) {
2316 im->pie_x = im->ximg - Xspacing - Xpie/2;
2317 im->pie_y = im->yorigin-Ymain+Ypie/2;
2318 } else {
2319 im->pie_x = im->ximg/2;
2320 im->pie_y = im->yorigin-Ypie/2;
2321 }
2322 #endif
2324 ytr(im,DNAN);
2325 return 0;
2326 }
2328 /* from http://www.cygnus-software.com/papers/comparingfloats/comparingfloats.htm */
2329 /* yes we are loosing precision by doing tos with floats instead of doubles
2330 but it seems more stable this way. */
2332 static int AlmostEqual2sComplement (float A, float B, int maxUlps)
2333 {
2335 int aInt = *(int*)&A;
2336 int bInt = *(int*)&B;
2337 int intDiff;
2338 /* Make sure maxUlps is non-negative and small enough that the
2339 default NAN won't compare as equal to anything. */
2341 /* assert(maxUlps > 0 && maxUlps < 4 * 1024 * 1024); */
2343 /* Make aInt lexicographically ordered as a twos-complement int */
2345 if (aInt < 0)
2346 aInt = 0x80000000l - aInt;
2348 /* Make bInt lexicographically ordered as a twos-complement int */
2350 if (bInt < 0)
2351 bInt = 0x80000000l - bInt;
2353 intDiff = abs(aInt - bInt);
2355 if (intDiff <= maxUlps)
2356 return 1;
2358 return 0;
2359 }
2361 /* draw that picture thing ... */
2362 int
2363 graph_paint(image_desc_t *im, char ***calcpr)
2364 {
2365 int i,ii;
2366 int lazy = lazy_check(im);
2367 #ifdef WITH_PIECHART
2368 int piechart = 0;
2369 double PieStart=0.0;
2370 #endif
2371 FILE *fo;
2372 gfx_node_t *node;
2374 double areazero = 0.0;
2375 graph_desc_t *lastgdes = NULL;
2377 /* if we are lazy and there is nothing to PRINT ... quit now */
2378 if (lazy && im->prt_c==0) return 0;
2380 /* pull the data from the rrd files ... */
2382 if(data_fetch(im)==-1)
2383 return -1;
2385 /* evaluate VDEF and CDEF operations ... */
2386 if(data_calc(im)==-1)
2387 return -1;
2389 #ifdef WITH_PIECHART
2390 /* check if we need to draw a piechart */
2391 for(i=0;i<im->gdes_c;i++){
2392 if (im->gdes[i].gf == GF_PART) {
2393 piechart=1;
2394 break;
2395 }
2396 }
2397 #endif
2399 /* calculate and PRINT and GPRINT definitions. We have to do it at
2400 * this point because it will affect the length of the legends
2401 * if there are no graph elements we stop here ...
2402 * if we are lazy, try to quit ...
2403 */
2404 i=print_calc(im,calcpr);
2405 if(i<0) return -1;
2406 if(((i==0)
2407 #ifdef WITH_PIECHART
2408 &&(piechart==0)
2409 #endif
2410 ) || lazy) return 0;
2412 #ifdef WITH_PIECHART
2413 /* If there's only the pie chart to draw, signal this */
2414 if (i==0) piechart=2;
2415 #endif
2417 /* get actual drawing data and find min and max values*/
2418 if(data_proc(im)==-1)
2419 return -1;
2421 if(!im->logarithmic){si_unit(im);} /* identify si magnitude Kilo, Mega Giga ? */
2423 if(!im->rigid && ! im->logarithmic)
2424 expand_range(im); /* make sure the upper and lower limit are
2425 sensible values */
2427 if (!calc_horizontal_grid(im))
2428 return -1;
2430 if (im->gridfit)
2431 apply_gridfit(im);
2434 /**************************************************************
2435 *** Calculating sizes and locations became a bit confusing ***
2436 *** so I moved this into a separate function. ***
2437 **************************************************************/
2438 if(graph_size_location(im,i
2439 #ifdef WITH_PIECHART
2440 ,piechart
2441 #endif
2442 )==-1)
2443 return -1;
2445 /* the actual graph is created by going through the individual
2446 graph elements and then drawing them */
2448 node=gfx_new_area ( im->canvas,
2449 0, 0,
2450 0, im->yimg,
2451 im->ximg, im->yimg,
2452 im->graph_col[GRC_BACK]);
2454 gfx_add_point(node,im->ximg, 0);
2456 #ifdef WITH_PIECHART
2457 if (piechart != 2) {
2458 #endif
2459 node=gfx_new_area ( im->canvas,
2460 im->xorigin, im->yorigin,
2461 im->xorigin + im->xsize, im->yorigin,
2462 im->xorigin + im->xsize, im->yorigin-im->ysize,
2463 im->graph_col[GRC_CANVAS]);
2465 gfx_add_point(node,im->xorigin, im->yorigin - im->ysize);
2467 if (im->minval > 0.0)
2468 areazero = im->minval;
2469 if (im->maxval < 0.0)
2470 areazero = im->maxval;
2471 #ifdef WITH_PIECHART
2472 }
2473 #endif
2475 #ifdef WITH_PIECHART
2476 if (piechart) {
2477 pie_part(im,im->graph_col[GRC_CANVAS],im->pie_x,im->pie_y,im->piesize*0.5,0,2*M_PI);
2478 }
2479 #endif
2481 for(i=0;i<im->gdes_c;i++){
2482 switch(im->gdes[i].gf){
2483 case GF_CDEF:
2484 case GF_VDEF:
2485 case GF_DEF:
2486 case GF_PRINT:
2487 case GF_GPRINT:
2488 case GF_COMMENT:
2489 case GF_HRULE:
2490 case GF_VRULE:
2491 case GF_XPORT:
2492 case GF_SHIFT:
2493 break;
2494 case GF_TICK:
2495 for (ii = 0; ii < im->xsize; ii++)
2496 {
2497 if (!isnan(im->gdes[i].p_data[ii]) &&
2498 im->gdes[i].p_data[ii] != 0.0)
2499 {
2500 if (im -> gdes[i].yrule > 0 ) {
2501 gfx_new_line(im->canvas,
2502 im -> xorigin + ii, im->yorigin,
2503 im -> xorigin + ii, im->yorigin - im -> gdes[i].yrule * im -> ysize,
2504 1.0,
2505 im -> gdes[i].col );
2506 } else if ( im -> gdes[i].yrule < 0 ) {
2507 gfx_new_line(im->canvas,
2508 im -> xorigin + ii, im->yorigin - im -> ysize,
2509 im -> xorigin + ii, im->yorigin - ( 1 - im -> gdes[i].yrule ) * im -> ysize,
2510 1.0,
2511 im -> gdes[i].col );
2513 }
2514 }
2515 }
2516 break;
2517 case GF_LINE:
2518 case GF_AREA:
2519 /* fix data points at oo and -oo */
2520 for(ii=0;ii<im->xsize;ii++){
2521 if (isinf(im->gdes[i].p_data[ii])){
2522 if (im->gdes[i].p_data[ii] > 0) {
2523 im->gdes[i].p_data[ii] = im->maxval ;
2524 } else {
2525 im->gdes[i].p_data[ii] = im->minval ;
2526 }
2528 }
2529 } /* for */
2531 /* *******************************************************
2532 a ___. (a,t)
2533 | | ___
2534 ____| | | |
2535 | |___|
2536 -------|--t-1--t--------------------------------
2538 if we know the value at time t was a then
2539 we draw a square from t-1 to t with the value a.
2541 ********************************************************* */
2542 if (im->gdes[i].col != 0x0){
2543 /* GF_LINE and friend */
2544 if(im->gdes[i].gf == GF_LINE ){
2545 double last_y=0.0;
2546 node = NULL;
2547 for(ii=1;ii<im->xsize;ii++){
2548 if (isnan(im->gdes[i].p_data[ii]) || (im->slopemode==1 && isnan(im->gdes[i].p_data[ii-1]))){
2549 node = NULL;
2550 continue;
2551 }
2552 if ( node == NULL ) {
2553 last_y = ytr(im,im->gdes[i].p_data[ii]);
2554 if ( im->slopemode == 0 ){
2555 node = gfx_new_line(im->canvas,
2556 ii-1+im->xorigin,last_y,
2557 ii+im->xorigin,last_y,
2558 im->gdes[i].linewidth,
2559 im->gdes[i].col);
2560 } else {
2561 node = gfx_new_line(im->canvas,
2562 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii-1]),
2563 ii+im->xorigin,last_y,
2564 im->gdes[i].linewidth,
2565 im->gdes[i].col);
2566 }
2567 } else {
2568 double new_y = ytr(im,im->gdes[i].p_data[ii]);
2569 if ( im->slopemode==0 && ! AlmostEqual2sComplement(new_y,last_y,4)){
2570 gfx_add_point(node,ii-1+im->xorigin,new_y);
2571 };
2572 last_y = new_y;
2573 gfx_add_point(node,ii+im->xorigin,new_y);
2574 };
2576 }
2577 } else {
2578 int idxI=-1;
2579 double *foreY=malloc(sizeof(double)*im->xsize*2);
2580 double *foreX=malloc(sizeof(double)*im->xsize*2);
2581 double *backY=malloc(sizeof(double)*im->xsize*2);
2582 double *backX=malloc(sizeof(double)*im->xsize*2);
2583 int drawem = 0;
2584 for(ii=0;ii<=im->xsize;ii++){
2585 double ybase,ytop;
2586 if ( idxI > 0 && ( drawem != 0 || ii==im->xsize)){
2587 int cntI=1;
2588 int lastI=0;
2589 while (cntI < idxI && AlmostEqual2sComplement(foreY[lastI],foreY[cntI],4) && AlmostEqual2sComplement(foreY[lastI],foreY[cntI+1],4)){cntI++;}
2590 node = gfx_new_area(im->canvas,
2591 backX[0],backY[0],
2592 foreX[0],foreY[0],
2593 foreX[cntI],foreY[cntI], im->gdes[i].col);
2594 while (cntI < idxI) {
2595 lastI = cntI;
2596 cntI++;
2597 while ( cntI < idxI && AlmostEqual2sComplement(foreY[lastI],foreY[cntI],4) && AlmostEqual2sComplement(foreY[lastI],foreY[cntI+1],4)){cntI++;}
2598 gfx_add_point(node,foreX[cntI],foreY[cntI]);
2599 }
2600 gfx_add_point(node,backX[idxI],backY[idxI]);
2601 while (idxI > 1){
2602 lastI = idxI;
2603 idxI--;
2604 while ( idxI > 1 && AlmostEqual2sComplement(backY[lastI], backY[idxI],4) && AlmostEqual2sComplement(backY[lastI],backY[idxI-1],4)){idxI--;}
2605 gfx_add_point(node,backX[idxI],backY[idxI]);
2606 }
2607 idxI=-1;
2608 drawem = 0;
2609 }
2610 if (drawem != 0){
2611 drawem = 0;
2612 idxI=-1;
2613 }
2614 if (ii == im->xsize) break;
2616 /* keep things simple for now, just draw these bars
2617 do not try to build a big and complex area */
2620 if ( im->slopemode == 0 && ii==0){
2621 continue;
2622 }
2623 if ( isnan(im->gdes[i].p_data[ii]) ) {
2624 drawem = 1;
2625 continue;
2626 }
2627 ytop = ytr(im,im->gdes[i].p_data[ii]);
2628 if ( lastgdes && im->gdes[i].stack ) {
2629 ybase = ytr(im,lastgdes->p_data[ii]);
2630 } else {
2631 ybase = ytr(im,areazero);
2632 }
2633 if ( ybase == ytop ){
2634 drawem = 1;
2635 continue;
2636 }
2637 /* every area has to be wound clock-wise,
2638 so we have to make sur base remains base */
2639 if (ybase > ytop){
2640 double extra = ytop;
2641 ytop = ybase;
2642 ybase = extra;
2643 }
2644 if ( im->slopemode == 0 ){
2645 backY[++idxI] = ybase-0.2;
2646 backX[idxI] = ii+im->xorigin-1;
2647 foreY[idxI] = ytop+0.2;
2648 foreX[idxI] = ii+im->xorigin-1;
2649 }
2650 backY[++idxI] = ybase-0.2;
2651 backX[idxI] = ii+im->xorigin;
2652 foreY[idxI] = ytop+0.2;
2653 foreX[idxI] = ii+im->xorigin;
2654 }
2655 /* close up any remaining area */
2656 free(foreY);
2657 free(foreX);
2658 free(backY);
2659 free(backX);
2660 } /* else GF_LINE */
2661 } /* if color != 0x0 */
2662 /* make sure we do not run into trouble when stacking on NaN */
2663 for(ii=0;ii<im->xsize;ii++){
2664 if (isnan(im->gdes[i].p_data[ii])) {
2665 if (lastgdes && (im->gdes[i].stack)) {
2666 im->gdes[i].p_data[ii] = lastgdes->p_data[ii];
2667 } else {
2668 im->gdes[i].p_data[ii] = areazero;
2669 }
2670 }
2671 }
2672 lastgdes = &(im->gdes[i]);
2673 break;
2674 #ifdef WITH_PIECHART
2675 case GF_PART:
2676 if(isnan(im->gdes[i].yrule)) /* fetch variable */
2677 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2679 if (finite(im->gdes[i].yrule)) { /* even the fetched var can be NaN */
2680 pie_part(im,im->gdes[i].col,
2681 im->pie_x,im->pie_y,im->piesize*0.4,
2682 M_PI*2.0*PieStart/100.0,
2683 M_PI*2.0*(PieStart+im->gdes[i].yrule)/100.0);
2684 PieStart += im->gdes[i].yrule;
2685 }
2686 break;
2687 #endif
2688 case GF_STACK:
2689 rrd_set_error("STACK should already be turned into LINE or AREA here");
2690 return -1;
2691 break;
2693 } /* switch */
2694 }
2695 #ifdef WITH_PIECHART
2696 if (piechart==2) {
2697 im->draw_x_grid=0;
2698 im->draw_y_grid=0;
2699 }
2700 #endif
2703 /* grid_paint also does the text */
2704 if( !(im->extra_flags & ONLY_GRAPH) )
2705 grid_paint(im);
2708 if( !(im->extra_flags & ONLY_GRAPH) )
2709 axis_paint(im);
2711 /* the RULES are the last thing to paint ... */
2712 for(i=0;i<im->gdes_c;i++){
2714 switch(im->gdes[i].gf){
2715 case GF_HRULE:
2716 if(isnan(im->gdes[i].yrule)) { /* fetch variable */
2717 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2718 };
2719 if(im->gdes[i].yrule >= im->minval
2720 && im->gdes[i].yrule <= im->maxval)
2721 gfx_new_line(im->canvas,
2722 im->xorigin,ytr(im,im->gdes[i].yrule),
2723 im->xorigin+im->xsize,ytr(im,im->gdes[i].yrule),
2724 1.0,im->gdes[i].col);
2725 break;
2726 case GF_VRULE:
2727 if(im->gdes[i].xrule == 0) { /* fetch variable */
2728 im->gdes[i].xrule = im->gdes[im->gdes[i].vidx].vf.when;
2729 };
2730 if(im->gdes[i].xrule >= im->start
2731 && im->gdes[i].xrule <= im->end)
2732 gfx_new_line(im->canvas,
2733 xtr(im,im->gdes[i].xrule),im->yorigin,
2734 xtr(im,im->gdes[i].xrule),im->yorigin-im->ysize,
2735 1.0,im->gdes[i].col);
2736 break;
2737 default:
2738 break;
2739 }
2740 }
2743 if (strcmp(im->graphfile,"-")==0) {
2744 fo = im->graphhandle ? im->graphhandle : stdout;
2745 #if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
2746 /* Change translation mode for stdout to BINARY */
2747 _setmode( _fileno( fo ), O_BINARY );
2748 #endif
2749 } else {
2750 if ((fo = fopen(im->graphfile,"wb")) == NULL) {
2751 rrd_set_error("Opening '%s' for write: %s",im->graphfile,
2752 rrd_strerror(errno));
2753 return (-1);
2754 }
2755 }
2756 gfx_render (im->canvas,im->ximg,im->yimg,0x00000000,fo);
2757 if (strcmp(im->graphfile,"-") != 0)
2758 fclose(fo);
2759 return 0;
2760 }
2763 /*****************************************************
2764 * graph stuff
2765 *****************************************************/
2767 int
2768 gdes_alloc(image_desc_t *im){
2770 im->gdes_c++;
2771 if ((im->gdes = (graph_desc_t *) rrd_realloc(im->gdes, (im->gdes_c)
2772 * sizeof(graph_desc_t)))==NULL){
2773 rrd_set_error("realloc graph_descs");
2774 return -1;
2775 }
2778 im->gdes[im->gdes_c-1].step=im->step;
2779 im->gdes[im->gdes_c-1].step_orig=im->step;
2780 im->gdes[im->gdes_c-1].stack=0;
2781 im->gdes[im->gdes_c-1].linewidth=0;
2782 im->gdes[im->gdes_c-1].debug=0;
2783 im->gdes[im->gdes_c-1].start=im->start;
2784 im->gdes[im->gdes_c-1].end=im->end;
2785 im->gdes[im->gdes_c-1].vname[0]='\0';
2786 im->gdes[im->gdes_c-1].data=NULL;
2787 im->gdes[im->gdes_c-1].ds_namv=NULL;
2788 im->gdes[im->gdes_c-1].data_first=0;
2789 im->gdes[im->gdes_c-1].p_data=NULL;
2790 im->gdes[im->gdes_c-1].rpnp=NULL;
2791 im->gdes[im->gdes_c-1].shift=0;
2792 im->gdes[im->gdes_c-1].col = 0x0;
2793 im->gdes[im->gdes_c-1].legend[0]='\0';
2794 im->gdes[im->gdes_c-1].format[0]='\0';
2795 im->gdes[im->gdes_c-1].rrd[0]='\0';
2796 im->gdes[im->gdes_c-1].ds=-1;
2797 im->gdes[im->gdes_c-1].p_data=NULL;
2798 im->gdes[im->gdes_c-1].yrule=DNAN;
2799 im->gdes[im->gdes_c-1].xrule=0;
2800 return 0;
2801 }
2803 /* copies input untill the first unescaped colon is found
2804 or until input ends. backslashes have to be escaped as well */
2805 int
2806 scan_for_col(const char *const input, int len, char *const output)
2807 {
2808 int inp,outp=0;
2809 for (inp=0;
2810 inp < len &&
2811 input[inp] != ':' &&
2812 input[inp] != '\0';
2813 inp++){
2814 if (input[inp] == '\\' &&
2815 input[inp+1] != '\0' &&
2816 (input[inp+1] == '\\' ||
2817 input[inp+1] == ':')){
2818 output[outp++] = input[++inp];
2819 }
2820 else {
2821 output[outp++] = input[inp];
2822 }
2823 }
2824 output[outp] = '\0';
2825 return inp;
2826 }
2827 /* Some surgery done on this function, it became ridiculously big.
2828 ** Things moved:
2829 ** - initializing now in rrd_graph_init()
2830 ** - options parsing now in rrd_graph_options()
2831 ** - script parsing now in rrd_graph_script()
2832 */
2833 int
2834 rrd_graph(int argc, char **argv, char ***prdata, int *xsize, int *ysize, FILE *stream, double *ymin, double *ymax)
2835 {
2836 image_desc_t im;
2837 rrd_graph_init(&im);
2838 im.graphhandle = stream;
2840 rrd_graph_options(argc,argv,&im);
2841 if (rrd_test_error()) {
2842 im_free(&im);
2843 return -1;
2844 }
2846 if (strlen(argv[optind])>=MAXPATH) {
2847 rrd_set_error("filename (including path) too long");
2848 im_free(&im);
2849 return -1;
2850 }
2851 strncpy(im.graphfile,argv[optind],MAXPATH-1);
2852 im.graphfile[MAXPATH-1]='\0';
2854 rrd_graph_script(argc,argv,&im,1);
2855 if (rrd_test_error()) {
2856 im_free(&im);
2857 return -1;
2858 }
2860 /* Everything is now read and the actual work can start */
2862 (*prdata)=NULL;
2863 if (graph_paint(&im,prdata)==-1){
2864 im_free(&im);
2865 return -1;
2866 }
2868 /* The image is generated and needs to be output.
2869 ** Also, if needed, print a line with information about the image.
2870 */
2872 *xsize=im.ximg;
2873 *ysize=im.yimg;
2874 *ymin=im.minval;
2875 *ymax=im.maxval;
2876 if (im.imginfo) {
2877 char *filename;
2878 if (!(*prdata)) {
2879 /* maybe prdata is not allocated yet ... lets do it now */
2880 if ((*prdata = calloc(2,sizeof(char *)))==NULL) {
2881 rrd_set_error("malloc imginfo");
2882 return -1;
2883 };
2884 }
2885 if(((*prdata)[0] = malloc((strlen(im.imginfo)+200+strlen(im.graphfile))*sizeof(char)))
2886 ==NULL){
2887 rrd_set_error("malloc imginfo");
2888 return -1;
2889 }
2890 filename=im.graphfile+strlen(im.graphfile);
2891 while(filename > im.graphfile) {
2892 if (*(filename-1)=='/' || *(filename-1)=='\\' ) break;
2893 filename--;
2894 }
2896 sprintf((*prdata)[0],im.imginfo,filename,(long)(im.canvas->zoom*im.ximg),(long)(im.canvas->zoom*im.yimg));
2897 }
2898 im_free(&im);
2899 return 0;
2900 }
2902 void
2903 rrd_graph_init(image_desc_t *im)
2904 {
2905 unsigned int i;
2907 #ifdef HAVE_TZSET
2908 tzset();
2909 #endif
2910 #ifdef HAVE_SETLOCALE
2911 setlocale(LC_TIME,"");
2912 #ifdef HAVE_MBSTOWCS
2913 setlocale(LC_CTYPE,"");
2914 #endif
2915 #endif
2916 im->yorigin=0;
2917 im->xorigin=0;
2918 im->minval=0;
2919 im->xlab_user.minsec = -1;
2920 im->ximg=0;
2921 im->yimg=0;
2922 im->xsize = 400;
2923 im->ysize = 100;
2924 im->step = 0;
2925 im->ylegend[0] = '\0';
2926 im->title[0] = '\0';
2927 im->watermark[0] = '\0';
2928 im->minval = DNAN;
2929 im->maxval = DNAN;
2930 im->unitsexponent= 9999;
2931 im->unitslength= 6;
2932 im->symbol = ' ';
2933 im->viewfactor = 1.0;
2934 im->extra_flags= 0;
2935 im->rigid = 0;
2936 im->gridfit = 1;
2937 im->imginfo = NULL;
2938 im->lazy = 0;
2939 im->slopemode = 0;
2940 im->logarithmic = 0;
2941 im->ygridstep = DNAN;
2942 im->draw_x_grid = 1;
2943 im->draw_y_grid = 1;
2944 im->base = 1000;
2945 im->prt_c = 0;
2946 im->gdes_c = 0;
2947 im->gdes = NULL;
2948 im->canvas = gfx_new_canvas();
2949 im->grid_dash_on = 1;
2950 im->grid_dash_off = 1;
2951 im->tabwidth = 40.0;
2953 for(i=0;i<DIM(graph_col);i++)
2954 im->graph_col[i]=graph_col[i];
2956 #if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
2957 {
2958 char *windir;
2959 char rrd_win_default_font[1000];
2960 windir = getenv("windir");
2961 /* %windir% is something like D:\windows or C:\winnt */
2962 if (windir != NULL) {
2963 strncpy(rrd_win_default_font,windir,500);
2964 rrd_win_default_font[500] = '\0';
2965 strcat(rrd_win_default_font,"\\fonts\\");
2966 strcat(rrd_win_default_font,RRD_DEFAULT_FONT);
2967 for(i=0;i<DIM(text_prop);i++){
2968 strncpy(text_prop[i].font,rrd_win_default_font,sizeof(text_prop[i].font)-1);
2969 text_prop[i].font[sizeof(text_prop[i].font)-1] = '\0';
2970 }
2971 }
2972 }
2973 #endif
2974 {
2975 char *deffont;
2976 deffont = getenv("RRD_DEFAULT_FONT");
2977 if (deffont != NULL) {
2978 for(i=0;i<DIM(text_prop);i++){
2979 strncpy(text_prop[i].font,deffont,sizeof(text_prop[i].font)-1);
2980 text_prop[i].font[sizeof(text_prop[i].font)-1] = '\0';
2981 }
2982 }
2983 }
2984 for(i=0;i<DIM(text_prop);i++){
2985 im->text_prop[i].size = text_prop[i].size;
2986 strcpy(im->text_prop[i].font,text_prop[i].font);
2987 }
2988 }
2990 void
2991 rrd_graph_options(int argc, char *argv[],image_desc_t *im)
2992 {
2993 int stroff;
2994 char *parsetime_error = NULL;
2995 char scan_gtm[12],scan_mtm[12],scan_ltm[12],col_nam[12];
2996 time_t start_tmp=0,end_tmp=0;
2997 long long_tmp;
2998 struct rrd_time_value start_tv, end_tv;
2999 gfx_color_t color;
3000 optind = 0; opterr = 0; /* initialize getopt */
3002 parsetime("end-24h", &start_tv);
3003 parsetime("now", &end_tv);
3005 while (1){
3006 static struct option long_options[] =
3007 {
3008 {"start", required_argument, 0, 's'},
3009 {"end", required_argument, 0, 'e'},
3010 {"x-grid", required_argument, 0, 'x'},
3011 {"y-grid", required_argument, 0, 'y'},
3012 {"vertical-label",required_argument,0,'v'},
3013 {"width", required_argument, 0, 'w'},
3014 {"height", required_argument, 0, 'h'},
3015 {"interlaced", no_argument, 0, 'i'},
3016 {"upper-limit",required_argument, 0, 'u'},
3017 {"lower-limit",required_argument, 0, 'l'},
3018 {"rigid", no_argument, 0, 'r'},
3019 {"base", required_argument, 0, 'b'},
3020 {"logarithmic",no_argument, 0, 'o'},
3021 {"color", required_argument, 0, 'c'},
3022 {"font", required_argument, 0, 'n'},
3023 {"title", required_argument, 0, 't'},
3024 {"imginfo", required_argument, 0, 'f'},
3025 {"imgformat", required_argument, 0, 'a'},
3026 {"lazy", no_argument, 0, 'z'},
3027 {"zoom", required_argument, 0, 'm'},
3028 {"no-legend", no_argument, 0, 'g'},
3029 {"force-rules-legend",no_argument,0, 'F'},
3030 {"only-graph", no_argument, 0, 'j'},
3031 {"alt-y-grid", no_argument, 0, 'Y'},
3032 {"no-minor", no_argument, 0, 'I'},
3033 {"slope-mode", no_argument, 0, 'E'},
3034 {"alt-autoscale", no_argument, 0, 'A'},
3035 {"alt-autoscale-max", no_argument, 0, 'M'},
3036 {"no-gridfit", no_argument, 0, 'N'},
3037 {"units-exponent",required_argument, 0, 'X'},
3038 {"units-length",required_argument, 0, 'L'},
3039 {"step", required_argument, 0, 'S'},
3040 {"tabwidth", required_argument, 0, 'T'},
3041 {"font-render-mode", required_argument, 0, 'R'},
3042 {"font-smoothing-threshold", required_argument, 0, 'B'},
3043 {"watermark", required_argument, 0, 'W'},
3044 {"alt-y-mrtg", no_argument, 0, 1000}, /* this has no effect it is just here to save old apps from crashing when they use it */
3045 {0,0,0,0}};
3046 int option_index = 0;
3047 int opt;
3048 int col_start,col_end;
3050 opt = getopt_long(argc, argv,
3051 "s:e:x:y:v:w:h:iu:l:rb:oc:n:m:t:f:a:I:zgjFYAMEX:L:S:T:NR:B:W:",
3052 long_options, &option_index);
3054 if (opt == EOF)
3055 break;
3057 switch(opt) {
3058 case 'I':
3059 im->extra_flags |= NOMINOR;
3060 break;
3061 case 'Y':
3062 im->extra_flags |= ALTYGRID;
3063 break;
3064 case 'A':
3065 im->extra_flags |= ALTAUTOSCALE;
3066 break;
3067 case 'M':
3068 im->extra_flags |= ALTAUTOSCALE_MAX;
3069 break;
3070 case 'j':
3071 im->extra_flags |= ONLY_GRAPH;
3072 break;
3073 case 'g':
3074 im->extra_flags |= NOLEGEND;
3075 break;
3076 case 'F':
3077 im->extra_flags |= FORCE_RULES_LEGEND;
3078 break;
3079 case 'X':
3080 im->unitsexponent = atoi(optarg);
3081 break;
3082 case 'L':
3083 im->unitslength = atoi(optarg);
3084 break;
3085 case 'T':
3086 im->tabwidth = atof(optarg);
3087 break;
3088 case 'S':
3089 im->step = atoi(optarg);
3090 break;
3091 case 'N':
3092 im->gridfit = 0;
3093 break;
3094 case 's':
3095 if ((parsetime_error = parsetime(optarg, &start_tv))) {
3096 rrd_set_error( "start time: %s", parsetime_error );
3097 return;
3098 }
3099 break;
3100 case 'e':
3101 if ((parsetime_error = parsetime(optarg, &end_tv))) {
3102 rrd_set_error( "end time: %s", parsetime_error );
3103 return;
3104 }
3105 break;
3106 case 'x':
3107 if(strcmp(optarg,"none") == 0){
3108 im->draw_x_grid=0;
3109 break;
3110 };
3112 if(sscanf(optarg,
3113 "%10[A-Z]:%ld:%10[A-Z]:%ld:%10[A-Z]:%ld:%ld:%n",
3114 scan_gtm,
3115 &im->xlab_user.gridst,
3116 scan_mtm,
3117 &im->xlab_user.mgridst,
3118 scan_ltm,
3119 &im->xlab_user.labst,
3120 &im->xlab_user.precis,
3121 &stroff) == 7 && stroff != 0){
3122 strncpy(im->xlab_form, optarg+stroff, sizeof(im->xlab_form) - 1);
3123 im->xlab_form[sizeof(im->xlab_form)-1] = '\0';
3124 if((int)(im->xlab_user.gridtm = tmt_conv(scan_gtm)) == -1){
3125 rrd_set_error("unknown keyword %s",scan_gtm);
3126 return;
3127 } else if ((int)(im->xlab_user.mgridtm = tmt_conv(scan_mtm)) == -1){
3128 rrd_set_error("unknown keyword %s",scan_mtm);
3129 return;
3130 } else if ((int)(im->xlab_user.labtm = tmt_conv(scan_ltm)) == -1){
3131 rrd_set_error("unknown keyword %s",scan_ltm);
3132 return;
3133 }
3134 im->xlab_user.minsec = 1;
3135 im->xlab_user.stst = im->xlab_form;
3136 } else {
3137 rrd_set_error("invalid x-grid format");
3138 return;
3139 }
3140 break;
3141 case 'y':
3143 if(strcmp(optarg,"none") == 0){
3144 im->draw_y_grid=0;
3145 break;
3146 };
3148 if(sscanf(optarg,
3149 "%lf:%d",
3150 &im->ygridstep,
3151 &im->ylabfact) == 2) {
3152 if(im->ygridstep<=0){
3153 rrd_set_error("grid step must be > 0");
3154 return;
3155 } else if (im->ylabfact < 1){
3156 rrd_set_error("label factor must be > 0");
3157 return;
3158 }
3159 } else {
3160 rrd_set_error("invalid y-grid format");
3161 return;
3162 }
3163 break;
3164 case 'v':
3165 strncpy(im->ylegend,optarg,150);
3166 im->ylegend[150]='\0';
3167 break;
3168 case 'u':
3169 im->maxval = atof(optarg);
3170 break;
3171 case 'l':
3172 im->minval = atof(optarg);
3173 break;
3174 case 'b':
3175 im->base = atol(optarg);
3176 if(im->base != 1024 && im->base != 1000 ){
3177 rrd_set_error("the only sensible value for base apart from 1000 is 1024");
3178 return;
3179 }
3180 break;
3181 case 'w':
3182 long_tmp = atol(optarg);
3183 if (long_tmp < 10) {
3184 rrd_set_error("width below 10 pixels");
3185 return;
3186 }
3187 im->xsize = long_tmp;
3188 break;
3189 case 'h':
3190 long_tmp = atol(optarg);
3191 if (long_tmp < 10) {
3192 rrd_set_error("height below 10 pixels");
3193 return;
3194 }
3195 im->ysize = long_tmp;
3196 break;
3197 case 'i':
3198 im->canvas->interlaced = 1;
3199 break;
3200 case 'r':
3201 im->rigid = 1;
3202 break;
3203 case 'f':
3204 im->imginfo = optarg;
3205 break;
3206 case 'a':
3207 if((int)(im->canvas->imgformat = if_conv(optarg)) == -1) {
3208 rrd_set_error("unsupported graphics format '%s'",optarg);
3209 return;
3210 }
3211 break;
3212 case 'z':
3213 im->lazy = 1;
3214 break;
3215 case 'E':
3216 im->slopemode = 1;
3217 break;
3219 case 'o':
3220 im->logarithmic = 1;
3221 if (isnan(im->minval))
3222 im->minval=1;
3223 break;
3224 case 'c':
3225 if(sscanf(optarg,
3226 "%10[A-Z]#%n%8lx%n",
3227 col_nam,&col_start,&color,&col_end) == 2){
3228 int ci;
3229 int col_len = col_end - col_start;
3230 switch (col_len){
3231 case 3:
3232 color = (
3233 ((color & 0xF00) * 0x110000) |
3234 ((color & 0x0F0) * 0x011000) |
3235 ((color & 0x00F) * 0x001100) |
3236 0x000000FF
3237 );
3238 break;
3239 case 4:
3240 color = (
3241 ((color & 0xF000) * 0x11000) |
3242 ((color & 0x0F00) * 0x01100) |
3243 ((color & 0x00F0) * 0x00110) |
3244 ((color & 0x000F) * 0x00011)
3245 );
3246 break;
3247 case 6:
3248 color = (color << 8) + 0xff /* shift left by 8 */;
3249 break;
3250 case 8:
3251 break;
3252 default:
3253 rrd_set_error("the color format is #RRGGBB[AA]");
3254 return;
3255 }
3256 if((ci=grc_conv(col_nam)) != -1){
3257 im->graph_col[ci]=color;
3258 } else {
3259 rrd_set_error("invalid color name '%s'",col_nam);
3260 return;
3261 }
3262 } else {
3263 rrd_set_error("invalid color def format");
3264 return;
3265 }
3266 break;
3267 case 'n':{
3268 char prop[15];
3269 double size = 1;
3270 char font[1024] = "";
3272 if(sscanf(optarg,
3273 "%10[A-Z]:%lf:%1000s",
3274 prop,&size,font) >= 2){
3275 int sindex,propidx;
3276 if((sindex=text_prop_conv(prop)) != -1){
3277 for (propidx=sindex;propidx<TEXT_PROP_LAST;propidx++){
3278 if (size > 0){
3279 im->text_prop[propidx].size=size;
3280 }
3281 if (strlen(font) > 0){
3282 strcpy(im->text_prop[propidx].font,font);
3283 }
3284 if (propidx==sindex && sindex != 0) break;
3285 }
3286 } else {
3287 rrd_set_error("invalid fonttag '%s'",prop);
3288 return;
3289 }
3290 } else {
3291 rrd_set_error("invalid text property format");
3292 return;
3293 }
3294 break;
3295 }
3296 case 'm':
3297 im->canvas->zoom = atof(optarg);
3298 if (im->canvas->zoom <= 0.0) {
3299 rrd_set_error("zoom factor must be > 0");
3300 return;
3301 }
3302 break;
3303 case 't':
3304 strncpy(im->title,optarg,150);
3305 im->title[150]='\0';
3306 break;
3308 case 'R':
3309 if ( strcmp( optarg, "normal" ) == 0 )
3310 im->canvas->aa_type = AA_NORMAL;
3311 else if ( strcmp( optarg, "light" ) == 0 )
3312 im->canvas->aa_type = AA_LIGHT;
3313 else if ( strcmp( optarg, "mono" ) == 0 )
3314 im->canvas->aa_type = AA_NONE;
3315 else
3316 {
3317 rrd_set_error("unknown font-render-mode '%s'", optarg );
3318 return;
3319 }
3320 break;
3322 case 'B':
3323 im->canvas->font_aa_threshold = atof(optarg);
3324 break;
3326 case 'W':
3327 strncpy(im->watermark,optarg,100);
3328 im->watermark[99]='\0';
3329 break;
3331 case '?':
3332 if (optopt != 0)
3333 rrd_set_error("unknown option '%c'", optopt);
3334 else
3335 rrd_set_error("unknown option '%s'",argv[optind-1]);
3336 return;
3337 }
3338 }
3340 if (optind >= argc) {
3341 rrd_set_error("missing filename");
3342 return;
3343 }
3345 if (im->logarithmic == 1 && (im->minval <= 0 || isnan(im->minval))){
3346 rrd_set_error("for a logarithmic yaxis you must specify a lower-limit > 0");
3347 return;
3348 }
3350 if (proc_start_end(&start_tv,&end_tv,&start_tmp,&end_tmp) == -1){
3351 /* error string is set in parsetime.c */
3352 return;
3353 }
3355 if (start_tmp < 3600*24*365*10){
3356 rrd_set_error("the first entry to fetch should be after 1980 (%ld)",start_tmp);
3357 return;
3358 }
3360 if (end_tmp < start_tmp) {
3361 rrd_set_error("start (%ld) should be less than end (%ld)",
3362 start_tmp, end_tmp);
3363 return;
3364 }
3366 im->start = start_tmp;
3367 im->end = end_tmp;
3368 im->step = max((long)im->step, (im->end-im->start)/im->xsize);
3369 }
3371 int
3372 rrd_graph_check_vname(image_desc_t *im, char *varname, char *err)
3373 {
3374 if ((im->gdes[im->gdes_c-1].vidx=find_var(im,varname))==-1) {
3375 rrd_set_error("Unknown variable '%s' in %s",varname,err);
3376 return -1;
3377 }
3378 return 0;
3379 }
3380 int
3381 rrd_graph_color(image_desc_t *im, char *var, char *err, int optional)
3382 {
3383 char *color;
3384 graph_desc_t *gdp=&im->gdes[im->gdes_c-1];
3386 color=strstr(var,"#");
3387 if (color==NULL) {
3388 if (optional==0) {
3389 rrd_set_error("Found no color in %s",err);
3390 return 0;
3391 }
3392 return 0;
3393 } else {
3394 int n=0;
3395 char *rest;
3396 gfx_color_t col;
3398 rest=strstr(color,":");
3399 if (rest!=NULL)
3400 n=rest-color;
3401 else
3402 n=strlen(color);
3404 switch (n) {
3405 case 7:
3406 sscanf(color,"#%6lx%n",&col,&n);
3407 col = (col << 8) + 0xff /* shift left by 8 */;
3408 if (n!=7) rrd_set_error("Color problem in %s",err);
3409 break;
3410 case 9:
3411 sscanf(color,"#%8lx%n",&col,&n);
3412 if (n==9) break;
3413 default:
3414 rrd_set_error("Color problem in %s",err);
3415 }
3416 if (rrd_test_error()) return 0;
3417 gdp->col = col;
3418 return n;
3419 }
3420 }
3423 int bad_format(char *fmt) {
3424 char *ptr;
3425 int n=0;
3426 ptr = fmt;
3427 while (*ptr != '\0')
3428 if (*ptr++ == '%') {
3430 /* line cannot end with percent char */
3431 if (*ptr == '\0') return 1;
3433 /* '%s', '%S' and '%%' are allowed */
3434 if (*ptr == 's' || *ptr == 'S' || *ptr == '%') ptr++;
3436 /* %c is allowed (but use only with vdef!) */
3437 else if (*ptr == 'c') {
3438 ptr++;
3439 n=1;
3440 }
3442 /* or else '% 6.2lf' and such are allowed */
3443 else {
3444 /* optional padding character */
3445 if (*ptr == ' ' || *ptr == '+' || *ptr == '-') ptr++;
3447 /* This should take care of 'm.n' with all three optional */
3448 while (*ptr >= '0' && *ptr <= '9') ptr++;
3449 if (*ptr == '.') ptr++;
3450 while (*ptr >= '0' && *ptr <= '9') ptr++;
3452 /* Either 'le', 'lf' or 'lg' must follow here */
3453 if (*ptr++ != 'l') return 1;
3454 if (*ptr == 'e' || *ptr == 'f' || *ptr == 'g') ptr++;
3455 else return 1;
3456 n++;
3457 }
3458 }
3460 return (n!=1);
3461 }
3464 int
3465 vdef_parse(gdes,str)
3466 struct graph_desc_t *gdes;
3467 const char *const str;
3468 {
3469 /* A VDEF currently is either "func" or "param,func"
3470 * so the parsing is rather simple. Change if needed.
3471 */
3472 double param;
3473 char func[30];
3474 int n;
3476 n=0;
3477 sscanf(str,"%le,%29[A-Z]%n",¶m,func,&n);
3478 if (n== (int)strlen(str)) { /* matched */
3479 ;
3480 } else {
3481 n=0;
3482 sscanf(str,"%29[A-Z]%n",func,&n);
3483 if (n== (int)strlen(str)) { /* matched */
3484 param=DNAN;
3485 } else {
3486 rrd_set_error("Unknown function string '%s' in VDEF '%s'"
3487 ,str
3488 ,gdes->vname
3489 );
3490 return -1;
3491 }
3492 }
3493 if (!strcmp("PERCENT",func)) gdes->vf.op = VDEF_PERCENT;
3494 else if (!strcmp("MAXIMUM",func)) gdes->vf.op = VDEF_MAXIMUM;
3495 else if (!strcmp("AVERAGE",func)) gdes->vf.op = VDEF_AVERAGE;
3496 else if (!strcmp("MINIMUM",func)) gdes->vf.op = VDEF_MINIMUM;
3497 else if (!strcmp("TOTAL", func)) gdes->vf.op = VDEF_TOTAL;
3498 else if (!strcmp("FIRST", func)) gdes->vf.op = VDEF_FIRST;
3499 else if (!strcmp("LAST", func)) gdes->vf.op = VDEF_LAST;
3500 else if (!strcmp("LSLSLOPE", func)) gdes->vf.op = VDEF_LSLSLOPE;
3501 else if (!strcmp("LSLINT", func)) gdes->vf.op = VDEF_LSLINT;
3502 else if (!strcmp("LSLCORREL",func)) gdes->vf.op = VDEF_LSLCORREL;
3503 else {
3504 rrd_set_error("Unknown function '%s' in VDEF '%s'\n"
3505 ,func
3506 ,gdes->vname
3507 );
3508 return -1;
3509 };
3511 switch (gdes->vf.op) {
3512 case VDEF_PERCENT:
3513 if (isnan(param)) { /* no parameter given */
3514 rrd_set_error("Function '%s' needs parameter in VDEF '%s'\n"
3515 ,func
3516 ,gdes->vname
3517 );
3518 return -1;
3519 };
3520 if (param>=0.0 && param<=100.0) {
3521 gdes->vf.param = param;
3522 gdes->vf.val = DNAN; /* undefined */
3523 gdes->vf.when = 0; /* undefined */
3524 } else {
3525 rrd_set_error("Parameter '%f' out of range in VDEF '%s'\n"
3526 ,param
3527 ,gdes->vname
3528 );
3529 return -1;
3530 };
3531 break;
3532 case VDEF_MAXIMUM:
3533 case VDEF_AVERAGE:
3534 case VDEF_MINIMUM:
3535 case VDEF_TOTAL:
3536 case VDEF_FIRST:
3537 case VDEF_LAST:
3538 case VDEF_LSLSLOPE:
3539 case VDEF_LSLINT:
3540 case VDEF_LSLCORREL:
3541 if (isnan(param)) {
3542 gdes->vf.param = DNAN;
3543 gdes->vf.val = DNAN;
3544 gdes->vf.when = 0;
3545 } else {
3546 rrd_set_error("Function '%s' needs no parameter in VDEF '%s'\n"
3547 ,func
3548 ,gdes->vname
3549 );
3550 return -1;
3551 };
3552 break;
3553 };
3554 return 0;
3555 }
3558 int
3559 vdef_calc(im,gdi)
3560 image_desc_t *im;
3561 int gdi;
3562 {
3563 graph_desc_t *src,*dst;
3564 rrd_value_t *data;
3565 long step,steps;
3567 dst = &im->gdes[gdi];
3568 src = &im->gdes[dst->vidx];
3569 data = src->data + src->ds;
3570 steps = (src->end - src->start) / src->step;
3572 #if 0
3573 printf("DEBUG: start == %lu, end == %lu, %lu steps\n"
3574 ,src->start
3575 ,src->end
3576 ,steps
3577 );
3578 #endif
3580 switch (dst->vf.op) {
3581 case VDEF_PERCENT: {
3582 rrd_value_t * array;
3583 int field;
3586 if ((array = malloc(steps*sizeof(double)))==NULL) {
3587 rrd_set_error("malloc VDEV_PERCENT");
3588 return -1;
3589 }
3590 for (step=0;step < steps; step++) {
3591 array[step]=data[step*src->ds_cnt];
3592 }
3593 qsort(array,step,sizeof(double),vdef_percent_compar);
3595 field = (steps-1)*dst->vf.param/100;
3596 dst->vf.val = array[field];
3597 dst->vf.when = 0; /* no time component */
3598 free(array);
3599 #if 0
3600 for(step=0;step<steps;step++)
3601 printf("DEBUG: %3li:%10.2f %c\n",step,array[step],step==field?'*':' ');
3602 #endif
3603 }
3604 break;
3605 case VDEF_MAXIMUM:
3606 step=0;
3607 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3608 if (step == steps) {
3609 dst->vf.val = DNAN;
3610 dst->vf.when = 0;
3611 } else {
3612 dst->vf.val = data[step*src->ds_cnt];
3613 dst->vf.when = src->start + (step+1)*src->step;
3614 }
3615 while (step != steps) {
3616 if (finite(data[step*src->ds_cnt])) {
3617 if (data[step*src->ds_cnt] > dst->vf.val) {
3618 dst->vf.val = data[step*src->ds_cnt];
3619 dst->vf.when = src->start + (step+1)*src->step;
3620 }
3621 }
3622 step++;
3623 }
3624 break;
3625 case VDEF_TOTAL:
3626 case VDEF_AVERAGE: {
3627 int cnt=0;
3628 double sum=0.0;
3629 for (step=0;step<steps;step++) {
3630 if (finite(data[step*src->ds_cnt])) {
3631 sum += data[step*src->ds_cnt];
3632 cnt ++;
3633 };
3634 }
3635 if (cnt) {
3636 if (dst->vf.op == VDEF_TOTAL) {
3637 dst->vf.val = sum*src->step;
3638 dst->vf.when = cnt*src->step; /* not really "when" */
3639 } else {
3640 dst->vf.val = sum/cnt;
3641 dst->vf.when = 0; /* no time component */
3642 };
3643 } else {
3644 dst->vf.val = DNAN;
3645 dst->vf.when = 0;
3646 }
3647 }
3648 break;
3649 case VDEF_MINIMUM:
3650 step=0;
3651 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3652 if (step == steps) {
3653 dst->vf.val = DNAN;
3654 dst->vf.when = 0;
3655 } else {
3656 dst->vf.val = data[step*src->ds_cnt];
3657 dst->vf.when = src->start + (step+1)*src->step;
3658 }
3659 while (step != steps) {
3660 if (finite(data[step*src->ds_cnt])) {
3661 if (data[step*src->ds_cnt] < dst->vf.val) {
3662 dst->vf.val = data[step*src->ds_cnt];
3663 dst->vf.when = src->start + (step+1)*src->step;
3664 }
3665 }
3666 step++;
3667 }
3668 break;
3669 case VDEF_FIRST:
3670 /* The time value returned here is one step before the
3671 * actual time value. This is the start of the first
3672 * non-NaN interval.
3673 */
3674 step=0;
3675 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3676 if (step == steps) { /* all entries were NaN */
3677 dst->vf.val = DNAN;
3678 dst->vf.when = 0;
3679 } else {
3680 dst->vf.val = data[step*src->ds_cnt];
3681 dst->vf.when = src->start + step*src->step;
3682 }
3683 break;
3684 case VDEF_LAST:
3685 /* The time value returned here is the
3686 * actual time value. This is the end of the last
3687 * non-NaN interval.
3688 */
3689 step=steps-1;
3690 while (step >= 0 && isnan(data[step*src->ds_cnt])) step--;
3691 if (step < 0) { /* all entries were NaN */
3692 dst->vf.val = DNAN;
3693 dst->vf.when = 0;
3694 } else {
3695 dst->vf.val = data[step*src->ds_cnt];
3696 dst->vf.when = src->start + (step+1)*src->step;
3697 }
3698 break;
3699 case VDEF_LSLSLOPE:
3700 case VDEF_LSLINT:
3701 case VDEF_LSLCORREL:{
3702 /* Bestfit line by linear least squares method */
3704 int cnt=0;
3705 double SUMx, SUMy, SUMxy, SUMxx, SUMyy, slope, y_intercept, correl ;
3706 SUMx = 0; SUMy = 0; SUMxy = 0; SUMxx = 0; SUMyy = 0;
3708 for (step=0;step<steps;step++) {
3709 if (finite(data[step*src->ds_cnt])) {
3710 cnt++;
3711 SUMx += step;
3712 SUMxx += step * step;
3713 SUMxy += step * data[step*src->ds_cnt];
3714 SUMy += data[step*src->ds_cnt];
3715 SUMyy += data[step*src->ds_cnt]*data[step*src->ds_cnt];
3716 };
3717 }
3719 slope = ( SUMx*SUMy - cnt*SUMxy ) / ( SUMx*SUMx - cnt*SUMxx );
3720 y_intercept = ( SUMy - slope*SUMx ) / cnt;
3721 correl = (SUMxy - (SUMx*SUMy)/cnt) / sqrt((SUMxx - (SUMx*SUMx)/cnt)*(SUMyy - (SUMy*SUMy)/cnt));
3723 if (cnt) {
3724 if (dst->vf.op == VDEF_LSLSLOPE) {
3725 dst->vf.val = slope;
3726 dst->vf.when = cnt*src->step;
3727 } else if (dst->vf.op == VDEF_LSLINT) {
3728 dst->vf.val = y_intercept;
3729 dst->vf.when = cnt*src->step;
3730 } else if (dst->vf.op == VDEF_LSLCORREL) {
3731 dst->vf.val = correl;
3732 dst->vf.when = cnt*src->step;
3733 };
3735 } else {
3736 dst->vf.val = DNAN;
3737 dst->vf.when = 0;
3738 }
3739 }
3740 break;
3741 }
3742 return 0;
3743 }
3745 /* NaN < -INF < finite_values < INF */
3746 int
3747 vdef_percent_compar(a,b)
3748 const void *a,*b;
3749 {
3750 /* Equality is not returned; this doesn't hurt except
3751 * (maybe) for a little performance.
3752 */
3754 /* First catch NaN values. They are smallest */
3755 if (isnan( *(double *)a )) return -1;
3756 if (isnan( *(double *)b )) return 1;
3758 /* NaN doesn't reach this part so INF and -INF are extremes.
3759 * The sign from isinf() is compatible with the sign we return
3760 */
3761 if (isinf( *(double *)a )) return isinf( *(double *)a );
3762 if (isinf( *(double *)b )) return isinf( *(double *)b );
3764 /* If we reach this, both values must be finite */
3765 if ( *(double *)a < *(double *)b ) return -1; else return 1;
3766 }