1 /****************************************************************************
2 * RRDtool 1.1.x Copyright Tobias Oetiker, 1997 - 2002
3 ****************************************************************************
4 * rrd__graph.c make creates ne rrds
5 ****************************************************************************/
25 #include "rrd_graph.h"
27 /* some constant definitions */
30 #ifndef RRD_DEFAULT_FONT
32 #define RRD_DEFAULT_FONT "c:/winnt/fonts/COUR.TTF"
34 #define RRD_DEFAULT_FONT "/usr/share/fonts/truetype/openoffice/ariosor.ttf"
35 /* #define RRD_DEFAULT_FONT "/usr/share/fonts/truetype/Arial.ttf" */
40 text_prop_t text_prop[] = {
41 { 10.0, RRD_DEFAULT_FONT }, /* default */
42 { 12.0, RRD_DEFAULT_FONT }, /* title */
43 { 8.0, RRD_DEFAULT_FONT }, /* axis */
44 { 10.0, RRD_DEFAULT_FONT }, /* unit */
45 { 10.0, RRD_DEFAULT_FONT } /* legend */
49 {0, TMT_SECOND,30, TMT_MINUTE,5, TMT_MINUTE,5, 0,"%H:%M"},
50 {2, TMT_MINUTE,1, TMT_MINUTE,5, TMT_MINUTE,5, 0,"%H:%M"},
51 {5, TMT_MINUTE,2, TMT_MINUTE,10, TMT_MINUTE,10, 0,"%H:%M"},
52 {10, TMT_MINUTE,5, TMT_MINUTE,20, TMT_MINUTE,20, 0,"%H:%M"},
53 {30, TMT_MINUTE,10, TMT_HOUR,1, TMT_HOUR,1, 0,"%H:%M"},
54 {60, TMT_MINUTE,30, TMT_HOUR,2, TMT_HOUR,2, 0,"%H:%M"},
55 {180, TMT_HOUR,1, TMT_HOUR,6, TMT_HOUR,6, 0,"%H:%M"},
56 /*{300, TMT_HOUR,3, TMT_HOUR,12, TMT_HOUR,12, 12*3600,"%a %p"}, this looks silly*/
57 {600, TMT_HOUR,6, TMT_DAY,1, TMT_DAY,1, 24*3600,"%a"},
58 {1800, TMT_HOUR,12, TMT_DAY,1, TMT_DAY,2, 24*3600,"%a"},
59 {3600, TMT_DAY,1, TMT_WEEK,1, TMT_WEEK,1, 7*24*3600,"Week %V"},
60 {3*3600, TMT_WEEK,1, TMT_MONTH,1, TMT_WEEK,2, 7*24*3600,"Week %V"},
61 {6*3600, TMT_MONTH,1, TMT_MONTH,1, TMT_MONTH,1, 30*24*3600,"%b"},
62 {48*3600, TMT_MONTH,1, TMT_MONTH,3, TMT_MONTH,3, 30*24*3600,"%b"},
63 {10*24*3600, TMT_YEAR,1, TMT_YEAR,1, TMT_YEAR,1, 365*24*3600,"%y"},
64 {-1,TMT_MONTH,0,TMT_MONTH,0,TMT_MONTH,0,0,""}
67 /* sensible logarithmic y label intervals ...
68 the first element of each row defines the possible starting points on the
69 y axis ... the other specify the */
71 double yloglab[][12]= {{ 1e9, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
72 { 1e3, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
73 { 1e1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
74 /* { 1e1, 1, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, */
75 { 1e1, 1, 2.5, 5, 7.5, 0, 0, 0, 0, 0, 0, 0 },
76 { 1e1, 1, 2, 4, 6, 8, 0, 0, 0, 0, 0, 0 },
77 { 1e1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0 },
78 { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }};
80 /* sensible y label intervals ...*/
98 gfx_color_t graph_col[] = /* default colors */
99 { 0xFFFFFFFF, /* canvas */
100 0xF0F0F0FF, /* background */
101 0xD0D0D0FF, /* shade A */
102 0xA0A0A0FF, /* shade B */
103 0x909090FF, /* grid */
104 0xE05050FF, /* major grid */
105 0x000000FF, /* font */
106 0x000000FF, /* frame */
107 0xFF0000FF /* arrow */
114 # define DPRINT(x) (void)(printf x, printf("\n"))
120 /* initialize with xtr(im,0); */
122 xtr(image_desc_t *im,time_t mytime){
125 pixie = (double) im->xsize / (double)(im->end - im->start);
128 return (int)((double)im->xorigin
129 + pixie * ( mytime - im->start ) );
132 /* translate data values into y coordinates */
134 ytr(image_desc_t *im, double value){
139 pixie = (double) im->ysize / (im->maxval - im->minval);
141 pixie = (double) im->ysize / (log10(im->maxval) - log10(im->minval));
143 } else if(!im->logarithmic) {
144 yval = im->yorigin - pixie * (value - im->minval);
146 if (value < im->minval) {
149 yval = im->yorigin - pixie * (log10(value) - log10(im->minval));
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 */
156 /* keep yval as-is */
157 } else if (yval > im->yorigin) {
158 yval = im->yorigin+2;
159 } else if (yval < im->yorigin - im->ysize){
160 yval = im->yorigin - im->ysize - 2;
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)
185 conv_if(CDEF,GF_CDEF)
186 conv_if(VDEF,GF_VDEF)
187 conv_if(PART,GF_PART)
188 conv_if(XPORT,GF_XPORT)
193 enum gfx_if_en if_conv(char *string){
203 enum tmt_en tmt_conv(char *string){
205 conv_if(SECOND,TMT_SECOND)
206 conv_if(MINUTE,TMT_MINUTE)
207 conv_if(HOUR,TMT_HOUR)
209 conv_if(WEEK,TMT_WEEK)
210 conv_if(MONTH,TMT_MONTH)
211 conv_if(YEAR,TMT_YEAR)
215 enum grc_en grc_conv(char *string){
217 conv_if(BACK,GRC_BACK)
218 conv_if(CANVAS,GRC_CANVAS)
219 conv_if(SHADEA,GRC_SHADEA)
220 conv_if(SHADEB,GRC_SHADEB)
221 conv_if(GRID,GRC_GRID)
222 conv_if(MGRID,GRC_MGRID)
223 conv_if(FONT,GRC_FONT)
224 conv_if(FRAME,GRC_FRAME)
225 conv_if(ARROW,GRC_ARROW)
230 enum text_prop_en text_prop_conv(char *string){
232 conv_if(DEFAULT,TEXT_PROP_DEFAULT)
233 conv_if(TITLE,TEXT_PROP_TITLE)
234 conv_if(AXIS,TEXT_PROP_AXIS)
235 conv_if(UNIT,TEXT_PROP_UNIT)
236 conv_if(LEGEND,TEXT_PROP_LEGEND)
244 im_free(image_desc_t *im)
248 if (im == NULL) return 0;
249 for(i=0;i<(unsigned)im->gdes_c;i++){
250 if (im->gdes[i].data_first){
251 /* careful here, because a single pointer can occur several times */
252 free (im->gdes[i].data);
253 if (im->gdes[i].ds_namv){
254 for (ii=0;ii<im->gdes[i].ds_cnt;ii++)
255 free(im->gdes[i].ds_namv[ii]);
256 free(im->gdes[i].ds_namv);
259 free (im->gdes[i].p_data);
260 free (im->gdes[i].rpnp);
263 gfx_destroy(im->canvas);
267 /* find SI magnitude symbol for the given number*/
270 image_desc_t *im, /* image description */
277 char *symbol[] = {"a", /* 10e-18 Atto */
278 "f", /* 10e-15 Femto */
279 "p", /* 10e-12 Pico */
280 "n", /* 10e-9 Nano */
281 "u", /* 10e-6 Micro */
282 "m", /* 10e-3 Milli */
287 "T", /* 10e12 Tera */
288 "P", /* 10e15 Peta */
294 if (*value == 0.0 || isnan(*value) ) {
298 sindex = floor(log(fabs(*value))/log((double)im->base));
299 *magfact = pow((double)im->base, (double)sindex);
300 (*value) /= (*magfact);
302 if ( sindex <= symbcenter && sindex >= -symbcenter) {
303 (*symb_ptr) = symbol[sindex+symbcenter];
311 /* find SI magnitude symbol for the numbers on the y-axis*/
314 image_desc_t *im /* image description */
318 char symbol[] = {'a', /* 10e-18 Atto */
319 'f', /* 10e-15 Femto */
320 'p', /* 10e-12 Pico */
321 'n', /* 10e-9 Nano */
322 'u', /* 10e-6 Micro */
323 'm', /* 10e-3 Milli */
328 'T', /* 10e12 Tera */
329 'P', /* 10e15 Peta */
335 if (im->unitsexponent != 9999) {
336 /* unitsexponent = 9, 6, 3, 0, -3, -6, -9, etc */
337 digits = floor(im->unitsexponent / 3);
339 digits = floor( log( max( fabs(im->minval),fabs(im->maxval)))/log((double)im->base));
341 im->magfact = pow((double)im->base , digits);
344 printf("digits %6.3f im->magfact %6.3f\n",digits,im->magfact);
347 if ( ((digits+symbcenter) < sizeof(symbol)) &&
348 ((digits+symbcenter) >= 0) )
349 im->symbol = symbol[(int)digits+symbcenter];
354 /* move min and max values around to become sensible */
357 expand_range(image_desc_t *im)
359 double sensiblevalues[] ={1000.0,900.0,800.0,750.0,700.0,
360 600.0,500.0,400.0,300.0,250.0,
361 200.0,125.0,100.0,90.0,80.0,
362 75.0,70.0,60.0,50.0,40.0,30.0,
363 25.0,20.0,10.0,9.0,8.0,
364 7.0,6.0,5.0,4.0,3.5,3.0,
365 2.5,2.0,1.8,1.5,1.2,1.0,
366 0.8,0.7,0.6,0.5,0.4,0.3,0.2,0.1,0.0,-1};
368 double scaled_min,scaled_max;
375 printf("Min: %6.2f Max: %6.2f MagFactor: %6.2f\n",
376 im->minval,im->maxval,im->magfact);
379 if (isnan(im->ygridstep)){
380 if(im->extra_flags & ALTAUTOSCALE) {
381 /* measure the amplitude of the function. Make sure that
382 graph boundaries are slightly higher then max/min vals
383 so we can see amplitude on the graph */
386 delt = im->maxval - im->minval;
388 fact = 2.0 * pow(10.0,
389 floor(log10(max(fabs(im->minval), fabs(im->maxval)))) - 2);
391 adj = (fact - delt) * 0.55;
393 printf("Min: %6.2f Max: %6.2f delt: %6.2f fact: %6.2f adj: %6.2f\n", im->minval, im->maxval, delt, fact, adj);
399 else if(im->extra_flags & ALTAUTOSCALE_MAX) {
400 /* measure the amplitude of the function. Make sure that
401 graph boundaries are slightly higher than max vals
402 so we can see amplitude on the graph */
403 adj = (im->maxval - im->minval) * 0.1;
407 scaled_min = im->minval / im->magfact;
408 scaled_max = im->maxval / im->magfact;
410 for (i=1; sensiblevalues[i] > 0; i++){
411 if (sensiblevalues[i-1]>=scaled_min &&
412 sensiblevalues[i]<=scaled_min)
413 im->minval = sensiblevalues[i]*(im->magfact);
415 if (-sensiblevalues[i-1]<=scaled_min &&
416 -sensiblevalues[i]>=scaled_min)
417 im->minval = -sensiblevalues[i-1]*(im->magfact);
419 if (sensiblevalues[i-1] >= scaled_max &&
420 sensiblevalues[i] <= scaled_max)
421 im->maxval = sensiblevalues[i-1]*(im->magfact);
423 if (-sensiblevalues[i-1]<=scaled_max &&
424 -sensiblevalues[i] >=scaled_max)
425 im->maxval = -sensiblevalues[i]*(im->magfact);
429 /* adjust min and max to the grid definition if there is one */
430 im->minval = (double)im->ylabfact * im->ygridstep *
431 floor(im->minval / ((double)im->ylabfact * im->ygridstep));
432 im->maxval = (double)im->ylabfact * im->ygridstep *
433 ceil(im->maxval /( (double)im->ylabfact * im->ygridstep));
437 fprintf(stderr,"SCALED Min: %6.2f Max: %6.2f Factor: %6.2f\n",
438 im->minval,im->maxval,im->magfact);
443 apply_gridfit(image_desc_t *im)
445 if (isnan(im->minval) || isnan(im->maxval))
448 if (im->logarithmic) {
449 double ya, yb, ypix, ypixfrac;
450 double log10_range = log10(im->maxval) - log10(im->minval);
451 ya = pow((double)10, floor(log10(im->minval)));
452 while (ya < im->minval)
455 return; /* don't have y=10^x gridline */
457 if (yb <= im->maxval) {
458 /* we have at least 2 y=10^x gridlines.
459 Make sure distance between them in pixels
460 are an integer by expanding im->maxval */
461 double y_pixel_delta = ytr(im, ya) - ytr(im, yb);
462 double factor = y_pixel_delta / floor(y_pixel_delta);
463 double new_log10_range = factor * log10_range;
464 double new_ymax_log10 = log10(im->minval) + new_log10_range;
465 im->maxval = pow(10, new_ymax_log10);
466 ytr(im, DNAN); /* reset precalc */
467 log10_range = log10(im->maxval) - log10(im->minval);
469 /* make sure first y=10^x gridline is located on
470 integer pixel position by moving scale slightly
471 downwards (sub-pixel movement) */
472 ypix = ytr(im, ya) + im->ysize; /* add im->ysize so it always is positive */
473 ypixfrac = ypix - floor(ypix);
474 if (ypixfrac > 0 && ypixfrac < 1) {
475 double yfrac = ypixfrac / im->ysize;
476 im->minval = pow(10, log10(im->minval) - yfrac * log10_range);
477 im->maxval = pow(10, log10(im->maxval) - yfrac * log10_range);
478 ytr(im, DNAN); /* reset precalc */
481 /* Make sure we have an integer pixel distance between
482 each minor gridline */
483 double ypos1 = ytr(im, im->minval);
484 double ypos2 = ytr(im, im->minval + im->ygrid_scale.gridstep);
485 double y_pixel_delta = ypos1 - ypos2;
486 double factor = y_pixel_delta / floor(y_pixel_delta);
487 double new_range = factor * (im->maxval - im->minval);
488 double gridstep = im->ygrid_scale.gridstep;
489 double minor_y, minor_y_px, minor_y_px_frac;
490 im->maxval = im->minval + new_range;
491 ytr(im, DNAN); /* reset precalc */
492 /* make sure first minor gridline is on integer pixel y coord */
493 minor_y = gridstep * floor(im->minval / gridstep);
494 while (minor_y < im->minval)
496 minor_y_px = ytr(im, minor_y) + im->ysize; /* ensure > 0 by adding ysize */
497 minor_y_px_frac = minor_y_px - floor(minor_y_px);
498 if (minor_y_px_frac > 0 && minor_y_px_frac < 1) {
499 double yfrac = minor_y_px_frac / im->ysize;
500 double range = im->maxval - im->minval;
501 im->minval = im->minval - yfrac * range;
502 im->maxval = im->maxval - yfrac * range;
503 ytr(im, DNAN); /* reset precalc */
505 calc_horizontal_grid(im); /* recalc with changed im->maxval */
509 /* reduce data reimplementation by Alex */
513 enum cf_en cf, /* which consolidation function ?*/
514 unsigned long cur_step, /* step the data currently is in */
515 time_t *start, /* start, end and step as requested ... */
516 time_t *end, /* ... by the application will be ... */
517 unsigned long *step, /* ... adjusted to represent reality */
518 unsigned long *ds_cnt, /* number of data sources in file */
519 rrd_value_t **data) /* two dimensional array containing the data */
521 int i,reduce_factor = ceil((double)(*step) / (double)cur_step);
522 unsigned long col,dst_row,row_cnt,start_offset,end_offset,skiprows=0;
523 rrd_value_t *srcptr,*dstptr;
525 (*step) = cur_step*reduce_factor; /* set new step size for reduced data */
528 row_cnt = ((*end)-(*start))/cur_step;
534 printf("Reducing %lu rows with factor %i time %lu to %lu, step %lu\n",
535 row_cnt,reduce_factor,*start,*end,cur_step);
536 for (col=0;col<row_cnt;col++) {
537 printf("time %10lu: ",*start+(col+1)*cur_step);
538 for (i=0;i<*ds_cnt;i++)
539 printf(" %8.2e",srcptr[*ds_cnt*col+i]);
544 /* We have to combine [reduce_factor] rows of the source
545 ** into one row for the destination. Doing this we also
546 ** need to take care to combine the correct rows. First
547 ** alter the start and end time so that they are multiples
548 ** of the new step time. We cannot reduce the amount of
549 ** time so we have to move the end towards the future and
550 ** the start towards the past.
552 end_offset = (*end) % (*step);
553 start_offset = (*start) % (*step);
555 /* If there is a start offset (which cannot be more than
556 ** one destination row), skip the appropriate number of
557 ** source rows and one destination row. The appropriate
558 ** number is what we do know (start_offset/cur_step) of
559 ** the new interval (*step/cur_step aka reduce_factor).
562 printf("start_offset: %lu end_offset: %lu\n",start_offset,end_offset);
563 printf("row_cnt before: %lu\n",row_cnt);
566 (*start) = (*start)-start_offset;
567 skiprows=reduce_factor-start_offset/cur_step;
568 srcptr+=skiprows* *ds_cnt;
569 for (col=0;col<(*ds_cnt);col++) *dstptr++ = DNAN;
573 printf("row_cnt between: %lu\n",row_cnt);
576 /* At the end we have some rows that are not going to be
577 ** used, the amount is end_offset/cur_step
580 (*end) = (*end)-end_offset+(*step);
581 skiprows = end_offset/cur_step;
585 printf("row_cnt after: %lu\n",row_cnt);
588 /* Sanity check: row_cnt should be multiple of reduce_factor */
589 /* if this gets triggered, something is REALLY WRONG ... we die immediately */
591 if (row_cnt%reduce_factor) {
592 printf("SANITY CHECK: %lu rows cannot be reduced by %i \n",
593 row_cnt,reduce_factor);
594 printf("BUG in reduce_data()\n");
598 /* Now combine reduce_factor intervals at a time
599 ** into one interval for the destination.
602 for (dst_row=0;row_cnt>=reduce_factor;dst_row++) {
603 for (col=0;col<(*ds_cnt);col++) {
604 rrd_value_t newval=DNAN;
605 unsigned long validval=0;
607 for (i=0;i<reduce_factor;i++) {
608 if (isnan(srcptr[i*(*ds_cnt)+col])) {
612 if (isnan(newval)) newval = srcptr[i*(*ds_cnt)+col];
620 newval += srcptr[i*(*ds_cnt)+col];
623 newval = min (newval,srcptr[i*(*ds_cnt)+col]);
626 /* an interval contains a failure if any subintervals contained a failure */
628 newval = max (newval,srcptr[i*(*ds_cnt)+col]);
631 newval = srcptr[i*(*ds_cnt)+col];
636 if (validval == 0){newval = DNAN;} else{
654 srcptr+=(*ds_cnt)*reduce_factor;
655 row_cnt-=reduce_factor;
657 /* If we had to alter the endtime, we didn't have enough
658 ** source rows to fill the last row. Fill it with NaN.
660 if (end_offset) for (col=0;col<(*ds_cnt);col++) *dstptr++ = DNAN;
662 row_cnt = ((*end)-(*start))/ *step;
664 printf("Done reducing. Currently %lu rows, time %lu to %lu, step %lu\n",
665 row_cnt,*start,*end,*step);
666 for (col=0;col<row_cnt;col++) {
667 printf("time %10lu: ",*start+(col+1)*(*step));
668 for (i=0;i<*ds_cnt;i++)
669 printf(" %8.2e",srcptr[*ds_cnt*col+i]);
676 /* get the data required for the graphs from the
680 data_fetch(image_desc_t *im )
685 /* pull the data from the log files ... */
686 for (i=0;i<im->gdes_c;i++){
687 /* only GF_DEF elements fetch data */
688 if (im->gdes[i].gf != GF_DEF)
692 /* do we have it already ?*/
693 for (ii=0;ii<i;ii++) {
694 if (im->gdes[ii].gf != GF_DEF)
696 if ((strcmp(im->gdes[i].rrd, im->gdes[ii].rrd) == 0)
697 && (im->gdes[i].cf == im->gdes[ii].cf)
698 && (im->gdes[i].start == im->gdes[ii].start)
699 && (im->gdes[i].end == im->gdes[ii].end)
700 && (im->gdes[i].step == im->gdes[ii].step)) {
701 /* OK, the data is already there.
702 ** Just copy the header portion
704 im->gdes[i].start = im->gdes[ii].start;
705 im->gdes[i].end = im->gdes[ii].end;
706 im->gdes[i].step = im->gdes[ii].step;
707 im->gdes[i].ds_cnt = im->gdes[ii].ds_cnt;
708 im->gdes[i].ds_namv = im->gdes[ii].ds_namv;
709 im->gdes[i].data = im->gdes[ii].data;
710 im->gdes[i].data_first = 0;
717 unsigned long ft_step = im->gdes[i].step ;
719 if((rrd_fetch_fn(im->gdes[i].rrd,
725 &im->gdes[i].ds_namv,
726 &im->gdes[i].data)) == -1){
729 im->gdes[i].data_first = 1;
731 if (ft_step < im->gdes[i].step) {
732 reduce_data(im->gdes[i].cf,
740 im->gdes[i].step = ft_step;
744 /* lets see if the required data source is realy there */
745 for(ii=0;ii<im->gdes[i].ds_cnt;ii++){
746 if(strcmp(im->gdes[i].ds_namv[ii],im->gdes[i].ds_nam) == 0){
749 if (im->gdes[i].ds== -1){
750 rrd_set_error("No DS called '%s' in '%s'",
751 im->gdes[i].ds_nam,im->gdes[i].rrd);
759 /* evaluate the expressions in the CDEF functions */
761 /*************************************************************
763 *************************************************************/
766 find_var_wrapper(void *arg1, char *key)
768 return find_var((image_desc_t *) arg1, key);
771 /* find gdes containing var*/
773 find_var(image_desc_t *im, char *key){
775 for(ii=0;ii<im->gdes_c-1;ii++){
776 if((im->gdes[ii].gf == GF_DEF
777 || im->gdes[ii].gf == GF_VDEF
778 || im->gdes[ii].gf == GF_CDEF)
779 && (strcmp(im->gdes[ii].vname,key) == 0)){
786 /* find the largest common denominator for all the numbers
787 in the 0 terminated num array */
792 for (i=0;num[i+1]!=0;i++){
794 rest=num[i] % num[i+1];
795 num[i]=num[i+1]; num[i+1]=rest;
799 /* return i==0?num[i]:num[i-1]; */
803 /* run the rpn calculator on all the VDEF and CDEF arguments */
805 data_calc( image_desc_t *im){
809 long *steparray, rpi;
814 rpnstack_init(&rpnstack);
816 for (gdi=0;gdi<im->gdes_c;gdi++){
817 /* Look for GF_VDEF and GF_CDEF in the same loop,
818 * so CDEFs can use VDEFs and vice versa
820 switch (im->gdes[gdi].gf) {
824 /* A VDEF has no DS. This also signals other parts
825 * of rrdtool that this is a VDEF value, not a CDEF.
827 im->gdes[gdi].ds_cnt = 0;
828 if (vdef_calc(im,gdi)) {
829 rrd_set_error("Error processing VDEF '%s'"
832 rpnstack_free(&rpnstack);
837 im->gdes[gdi].ds_cnt = 1;
838 im->gdes[gdi].ds = 0;
839 im->gdes[gdi].data_first = 1;
840 im->gdes[gdi].start = 0;
841 im->gdes[gdi].end = 0;
846 /* Find the variables in the expression.
847 * - VDEF variables are substituted by their values
848 * and the opcode is changed into OP_NUMBER.
849 * - CDEF variables are analized for their step size,
850 * the lowest common denominator of all the step
851 * sizes of the data sources involved is calculated
852 * and the resulting number is the step size for the
853 * resulting data source.
855 for(rpi=0;im->gdes[gdi].rpnp[rpi].op != OP_END;rpi++){
856 if(im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
857 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER){
858 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
859 if (im->gdes[ptr].ds_cnt == 0) {
861 printf("DEBUG: inside CDEF '%s' processing VDEF '%s'\n",
863 im->gdes[ptr].vname);
864 printf("DEBUG: value from vdef is %f\n",im->gdes[ptr].vf.val);
866 im->gdes[gdi].rpnp[rpi].val = im->gdes[ptr].vf.val;
867 im->gdes[gdi].rpnp[rpi].op = OP_NUMBER;
870 rrd_realloc(steparray,
871 (++stepcnt+1)*sizeof(*steparray)))==NULL){
872 rrd_set_error("realloc steparray");
873 rpnstack_free(&rpnstack);
877 steparray[stepcnt-1] = im->gdes[ptr].step;
879 /* adjust start and end of cdef (gdi) so
880 * that it runs from the latest start point
881 * to the earliest endpoint of any of the
882 * rras involved (ptr)
884 if(im->gdes[gdi].start < im->gdes[ptr].start)
885 im->gdes[gdi].start = im->gdes[ptr].start;
887 if(im->gdes[gdi].end == 0 ||
888 im->gdes[gdi].end > im->gdes[ptr].end)
889 im->gdes[gdi].end = im->gdes[ptr].end;
891 /* store pointer to the first element of
892 * the rra providing data for variable,
893 * further save step size and data source
896 im->gdes[gdi].rpnp[rpi].data = im->gdes[ptr].data + im->gdes[ptr].ds;
897 im->gdes[gdi].rpnp[rpi].step = im->gdes[ptr].step;
898 im->gdes[gdi].rpnp[rpi].ds_cnt = im->gdes[ptr].ds_cnt;
900 /* backoff the *.data ptr; this is done so
901 * rpncalc() function doesn't have to treat
902 * the first case differently
904 } /* if ds_cnt != 0 */
905 } /* if OP_VARIABLE */
906 } /* loop through all rpi */
908 /* move the data pointers to the correct period */
909 for(rpi=0;im->gdes[gdi].rpnp[rpi].op != OP_END;rpi++){
910 if(im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
911 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER){
912 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
913 if(im->gdes[gdi].start > im->gdes[ptr].start) {
914 im->gdes[gdi].rpnp[rpi].data += im->gdes[gdi].rpnp[rpi].ds_cnt;
920 if(steparray == NULL){
921 rrd_set_error("rpn expressions without DEF"
922 " or CDEF variables are not supported");
923 rpnstack_free(&rpnstack);
926 steparray[stepcnt]=0;
927 /* Now find the resulting step. All steps in all
928 * used RRAs have to be visited
930 im->gdes[gdi].step = lcd(steparray);
932 if((im->gdes[gdi].data = malloc((
933 (im->gdes[gdi].end-im->gdes[gdi].start)
934 / im->gdes[gdi].step)
935 * sizeof(double)))==NULL){
936 rrd_set_error("malloc im->gdes[gdi].data");
937 rpnstack_free(&rpnstack);
941 /* Step through the new cdef results array and
942 * calculate the values
944 for (now = im->gdes[gdi].start + im->gdes[gdi].step;
945 now<=im->gdes[gdi].end;
946 now += im->gdes[gdi].step)
948 rpnp_t *rpnp = im -> gdes[gdi].rpnp;
950 /* 3rd arg of rpn_calc is for OP_VARIABLE lookups;
951 * in this case we are advancing by timesteps;
952 * we use the fact that time_t is a synonym for long
954 if (rpn_calc(rpnp,&rpnstack,(long) now,
955 im->gdes[gdi].data,++dataidx) == -1) {
956 /* rpn_calc sets the error string */
957 rpnstack_free(&rpnstack);
960 } /* enumerate over time steps within a CDEF */
965 } /* enumerate over CDEFs */
966 rpnstack_free(&rpnstack);
970 /* massage data so, that we get one value for each x coordinate in the graph */
972 data_proc( image_desc_t *im ){
974 double pixstep = (double)(im->end-im->start)
975 /(double)im->xsize; /* how much time
976 passes in one pixel */
978 double minval=DNAN,maxval=DNAN;
980 unsigned long gr_time;
982 /* memory for the processed data */
983 for(i=0;i<im->gdes_c;i++) {
984 if((im->gdes[i].gf==GF_LINE) ||
985 (im->gdes[i].gf==GF_AREA) ||
986 (im->gdes[i].gf==GF_TICK) ||
987 (im->gdes[i].gf==GF_STACK)) {
988 if((im->gdes[i].p_data = malloc((im->xsize +1)
989 * sizeof(rrd_value_t)))==NULL){
990 rrd_set_error("malloc data_proc");
996 for (i=0;i<im->xsize;i++) { /* for each pixel */
998 gr_time = im->start+pixstep*i; /* time of the current step */
1001 for (ii=0;ii<im->gdes_c;ii++) {
1003 switch (im->gdes[ii].gf) {
1007 if (!im->gdes[ii].stack)
1010 value = im->gdes[ii].yrule;
1011 if (isnan(value) || (im->gdes[ii].gf == GF_TICK)) {
1012 /* The time of the data doesn't necessarily match
1013 ** the time of the graph. Beware.
1015 vidx = im->gdes[ii].vidx;
1016 if ( (gr_time >= im->gdes[vidx].start) &&
1017 (gr_time <= im->gdes[vidx].end) ) {
1018 value = im->gdes[vidx].data[
1019 (unsigned long) floor(
1020 (double)(gr_time - im->gdes[vidx].start)
1021 / im->gdes[vidx].step)
1022 * im->gdes[vidx].ds_cnt
1030 if (! isnan(value)) {
1032 im->gdes[ii].p_data[i] = paintval;
1033 /* GF_TICK: the data values are not
1034 ** relevant for min and max
1036 if (finite(paintval) && im->gdes[ii].gf != GF_TICK ) {
1037 if (isnan(minval) || paintval < minval)
1039 if (isnan(maxval) || paintval > maxval)
1043 im->gdes[ii].p_data[i] = DNAN;
1052 /* if min or max have not been asigned a value this is because
1053 there was no data in the graph ... this is not good ...
1054 lets set these to dummy values then ... */
1056 if (isnan(minval)) minval = 0.0;
1057 if (isnan(maxval)) maxval = 1.0;
1059 /* adjust min and max values */
1060 if (isnan(im->minval)
1061 /* don't adjust low-end with log scale */
1062 || ((!im->logarithmic && !im->rigid) && im->minval > minval)
1064 im->minval = minval;
1065 if (isnan(im->maxval)
1066 || (!im->rigid && im->maxval < maxval)
1068 if (im->logarithmic)
1069 im->maxval = maxval * 1.1;
1071 im->maxval = maxval;
1073 /* make sure min and max are not equal */
1074 if (im->minval == im->maxval) {
1076 if (! im->logarithmic) {
1079 /* make sure min and max are not both zero */
1080 if (im->maxval == 0.0) {
1089 /* identify the point where the first gridline, label ... gets placed */
1093 time_t start, /* what is the initial time */
1094 enum tmt_en baseint, /* what is the basic interval */
1095 long basestep /* how many if these do we jump a time */
1099 localtime_r(&start, &tm);
1102 tm.tm_sec -= tm.tm_sec % basestep; break;
1105 tm.tm_min -= tm.tm_min % basestep;
1110 tm.tm_hour -= tm.tm_hour % basestep; break;
1112 /* we do NOT look at the basestep for this ... */
1115 tm.tm_hour = 0; break;
1117 /* we do NOT look at the basestep for this ... */
1121 tm.tm_mday -= tm.tm_wday -1; /* -1 because we want the monday */
1122 if (tm.tm_wday==0) tm.tm_mday -= 7; /* we want the *previous* monday */
1129 tm.tm_mon -= tm.tm_mon % basestep; break;
1137 tm.tm_year -= (tm.tm_year+1900) % basestep;
1142 /* identify the point where the next gridline, label ... gets placed */
1145 time_t current, /* what is the initial time */
1146 enum tmt_en baseint, /* what is the basic interval */
1147 long basestep /* how many if these do we jump a time */
1152 localtime_r(¤t, &tm);
1156 tm.tm_sec += basestep; break;
1158 tm.tm_min += basestep; break;
1160 tm.tm_hour += basestep; break;
1162 tm.tm_mday += basestep; break;
1164 tm.tm_mday += 7*basestep; break;
1166 tm.tm_mon += basestep; break;
1168 tm.tm_year += basestep;
1170 madetime = mktime(&tm);
1171 } while (madetime == -1); /* this is necessary to skip impssible times
1172 like the daylight saving time skips */
1178 /* calculate values required for PRINT and GPRINT functions */
1181 print_calc(image_desc_t *im, char ***prdata)
1183 long i,ii,validsteps;
1186 int graphelement = 0;
1189 double magfact = -1;
1193 if (im->imginfo) prlines++;
1194 for(i=0;i<im->gdes_c;i++){
1195 switch(im->gdes[i].gf){
1198 if(((*prdata) = rrd_realloc((*prdata),prlines*sizeof(char *)))==NULL){
1199 rrd_set_error("realloc prdata");
1203 /* PRINT and GPRINT can now print VDEF generated values.
1204 * There's no need to do any calculations on them as these
1205 * calculations were already made.
1207 vidx = im->gdes[i].vidx;
1208 if (im->gdes[vidx].gf==GF_VDEF) { /* simply use vals */
1209 printval = im->gdes[vidx].vf.val;
1210 printtime = im->gdes[vidx].vf.when;
1211 } else { /* need to calculate max,min,avg etcetera */
1212 max_ii =((im->gdes[vidx].end
1213 - im->gdes[vidx].start)
1214 / im->gdes[vidx].step
1215 * im->gdes[vidx].ds_cnt);
1218 for( ii=im->gdes[vidx].ds;
1220 ii+=im->gdes[vidx].ds_cnt){
1221 if (! finite(im->gdes[vidx].data[ii]))
1223 if (isnan(printval)){
1224 printval = im->gdes[vidx].data[ii];
1229 switch (im->gdes[i].cf){
1232 case CF_DEVSEASONAL:
1236 printval += im->gdes[vidx].data[ii];
1239 printval = min( printval, im->gdes[vidx].data[ii]);
1243 printval = max( printval, im->gdes[vidx].data[ii]);
1246 printval = im->gdes[vidx].data[ii];
1249 if (im->gdes[i].cf==CF_AVERAGE || im->gdes[i].cf > CF_LAST) {
1250 if (validsteps > 1) {
1251 printval = (printval / validsteps);
1254 } /* prepare printval */
1256 if (!strcmp(im->gdes[i].format,"%c")) { /* VDEF time print */
1257 char ctime_buf[128]; /* PS: for ctime_r, must be >= 26 chars */
1258 if (im->gdes[i].gf == GF_PRINT){
1259 (*prdata)[prlines-2] = malloc((FMT_LEG_LEN+2)*sizeof(char));
1260 sprintf((*prdata)[prlines-2],"%s (%lu)",
1261 ctime_r(&printtime,ctime_buf),printtime);
1262 (*prdata)[prlines-1] = NULL;
1264 sprintf(im->gdes[i].legend,"%s (%lu)",
1265 ctime_r(&printtime,ctime_buf),printtime);
1269 if ((percent_s = strstr(im->gdes[i].format,"%S")) != NULL) {
1270 /* Magfact is set to -1 upon entry to print_calc. If it
1271 * is still less than 0, then we need to run auto_scale.
1272 * Otherwise, put the value into the correct units. If
1273 * the value is 0, then do not set the symbol or magnification
1274 * so next the calculation will be performed again. */
1275 if (magfact < 0.0) {
1276 auto_scale(im,&printval,&si_symb,&magfact);
1277 if (printval == 0.0)
1280 printval /= magfact;
1282 *(++percent_s) = 's';
1283 } else if (strstr(im->gdes[i].format,"%s") != NULL) {
1284 auto_scale(im,&printval,&si_symb,&magfact);
1287 if (im->gdes[i].gf == GF_PRINT){
1288 (*prdata)[prlines-2] = malloc((FMT_LEG_LEN+2)*sizeof(char));
1289 (*prdata)[prlines-1] = NULL;
1290 if (bad_format(im->gdes[i].format)) {
1291 rrd_set_error("bad format for [G]PRINT in '%s'", im->gdes[i].format);
1294 #ifdef HAVE_SNPRINTF
1295 snprintf((*prdata)[prlines-2],FMT_LEG_LEN,im->gdes[i].format,printval,si_symb);
1297 sprintf((*prdata)[prlines-2],im->gdes[i].format,printval,si_symb);
1302 if (bad_format(im->gdes[i].format)) {
1303 rrd_set_error("bad format for [G]PRINT in '%s'", im->gdes[i].format);
1306 #ifdef HAVE_SNPRINTF
1307 snprintf(im->gdes[i].legend,FMT_LEG_LEN-2,im->gdes[i].format,printval,si_symb);
1309 sprintf(im->gdes[i].legend,im->gdes[i].format,printval,si_symb);
1332 return graphelement;
1336 /* place legends with color spots */
1338 leg_place(image_desc_t *im)
1341 int interleg = im->text_prop[TEXT_PROP_LEGEND].size*2.0;
1342 int box =im->text_prop[TEXT_PROP_LEGEND].size*1.5;
1343 int border = im->text_prop[TEXT_PROP_LEGEND].size*2.0;
1344 int fill=0, fill_last;
1346 int leg_x = border, leg_y = im->yimg;
1350 char prt_fctn; /*special printfunctions */
1353 if( !(im->extra_flags & NOLEGEND) ) {
1354 if ((legspace = malloc(im->gdes_c*sizeof(int)))==NULL){
1355 rrd_set_error("malloc for legspace");
1359 for(i=0;i<im->gdes_c;i++){
1362 leg_cc = strlen(im->gdes[i].legend);
1364 /* is there a controle code ant the end of the legend string ? */
1365 if (leg_cc >= 2 && im->gdes[i].legend[leg_cc-2] == '\\') {
1366 prt_fctn = im->gdes[i].legend[leg_cc-1];
1368 im->gdes[i].legend[leg_cc] = '\0';
1372 /* remove exess space */
1373 while (prt_fctn=='g' &&
1375 im->gdes[i].legend[leg_cc-1]==' '){
1377 im->gdes[i].legend[leg_cc]='\0';
1380 legspace[i]=(prt_fctn=='g' ? 0 : interleg);
1383 /* no interleg space if string ends in \g */
1384 fill += legspace[i];
1386 if (im->gdes[i].gf != GF_GPRINT &&
1387 im->gdes[i].gf != GF_COMMENT) {
1390 fill += gfx_get_text_width(im->canvas, fill+border,
1391 im->text_prop[TEXT_PROP_LEGEND].font,
1392 im->text_prop[TEXT_PROP_LEGEND].size,
1394 im->gdes[i].legend);
1399 /* who said there was a special tag ... ?*/
1400 if (prt_fctn=='g') {
1403 if (prt_fctn == '\0') {
1404 if (i == im->gdes_c -1 ) prt_fctn ='l';
1406 /* is it time to place the legends ? */
1407 if (fill > im->ximg - 2*border){
1422 if (prt_fctn != '\0'){
1424 if (leg_c >= 2 && prt_fctn == 'j') {
1425 glue = (im->ximg - fill - 2* border) / (leg_c-1);
1429 if (prt_fctn =='c') leg_x = (im->ximg - fill) / 2.0;
1430 if (prt_fctn =='r') leg_x = im->ximg - fill - border;
1432 for(ii=mark;ii<=i;ii++){
1433 if(im->gdes[ii].legend[0]=='\0')
1435 im->gdes[ii].leg_x = leg_x;
1436 im->gdes[ii].leg_y = leg_y;
1438 gfx_get_text_width(im->canvas, leg_x,
1439 im->text_prop[TEXT_PROP_LEGEND].font,
1440 im->text_prop[TEXT_PROP_LEGEND].size,
1442 im->gdes[ii].legend)
1445 if (im->gdes[ii].gf != GF_GPRINT &&
1446 im->gdes[ii].gf != GF_COMMENT)
1449 leg_y = leg_y + im->text_prop[TEXT_PROP_LEGEND].size*1.2;
1450 if (prt_fctn == 's') leg_y -= im->text_prop[TEXT_PROP_LEGEND].size*1.2;
1462 /* create a grid on the graph. it determines what to do
1463 from the values of xsize, start and end */
1465 /* the xaxis labels are determined from the number of seconds per pixel
1466 in the requested graph */
1471 calc_horizontal_grid(image_desc_t *im)
1477 int decimals, fractionals;
1479 im->ygrid_scale.labfact=2;
1481 range = im->maxval - im->minval;
1482 scaledrange = range / im->magfact;
1484 /* does the scale of this graph make it impossible to put lines
1485 on it? If so, give up. */
1486 if (isnan(scaledrange)) {
1490 /* find grid spaceing */
1492 if(isnan(im->ygridstep)){
1493 if(im->extra_flags & ALTYGRID) {
1494 /* find the value with max number of digits. Get number of digits */
1495 decimals = ceil(log10(max(fabs(im->maxval), fabs(im->minval))));
1496 if(decimals <= 0) /* everything is small. make place for zero */
1499 fractionals = floor(log10(range));
1500 if(fractionals < 0) /* small amplitude. */
1501 sprintf(im->ygrid_scale.labfmt, "%%%d.%df", decimals - fractionals + 1, -fractionals + 1);
1503 sprintf(im->ygrid_scale.labfmt, "%%%d.1f", decimals + 1);
1504 im->ygrid_scale.gridstep = pow((double)10, (double)fractionals);
1505 if(im->ygrid_scale.gridstep == 0) /* range is one -> 0.1 is reasonable scale */
1506 im->ygrid_scale.gridstep = 0.1;
1507 /* should have at least 5 lines but no more then 15 */
1508 if(range/im->ygrid_scale.gridstep < 5)
1509 im->ygrid_scale.gridstep /= 10;
1510 if(range/im->ygrid_scale.gridstep > 15)
1511 im->ygrid_scale.gridstep *= 10;
1512 if(range/im->ygrid_scale.gridstep > 5) {
1513 im->ygrid_scale.labfact = 1;
1514 if(range/im->ygrid_scale.gridstep > 8)
1515 im->ygrid_scale.labfact = 2;
1518 im->ygrid_scale.gridstep /= 5;
1519 im->ygrid_scale.labfact = 5;
1523 for(i=0;ylab[i].grid > 0;i++){
1524 pixel = im->ysize / (scaledrange / ylab[i].grid);
1525 if (gridind == -1 && pixel > 5) {
1532 if (pixel * ylab[gridind].lfac[i] >= 2 * im->text_prop[TEXT_PROP_AXIS].size) {
1533 im->ygrid_scale.labfact = ylab[gridind].lfac[i];
1538 im->ygrid_scale.gridstep = ylab[gridind].grid * im->magfact;
1541 im->ygrid_scale.gridstep = im->ygridstep;
1542 im->ygrid_scale.labfact = im->ylabfact;
1547 int draw_horizontal_grid(image_desc_t *im)
1551 char graph_label[100];
1552 double X0=im->xorigin;
1553 double X1=im->xorigin+im->xsize;
1555 int sgrid = (int)( im->minval / im->ygrid_scale.gridstep - 1);
1556 int egrid = (int)( im->maxval / im->ygrid_scale.gridstep + 1);
1557 scaledstep = im->ygrid_scale.gridstep/im->magfact;
1558 for (i = sgrid; i <= egrid; i++){
1559 double Y0=ytr(im,im->ygrid_scale.gridstep*i);
1560 if ( Y0 >= im->yorigin-im->ysize
1561 && Y0 <= im->yorigin){
1562 if(i % im->ygrid_scale.labfact == 0){
1563 if (i==0 || im->symbol == ' ') {
1565 if(im->extra_flags & ALTYGRID) {
1566 sprintf(graph_label,im->ygrid_scale.labfmt,scaledstep*i);
1569 sprintf(graph_label,"%4.1f",scaledstep*i);
1572 sprintf(graph_label,"%4.0f",scaledstep*i);
1576 sprintf(graph_label,"%4.1f %c",scaledstep*i, im->symbol);
1578 sprintf(graph_label,"%4.0f %c",scaledstep*i, im->symbol);
1582 gfx_new_text ( im->canvas,
1583 X0-im->text_prop[TEXT_PROP_AXIS].size/1.5, Y0,
1584 im->graph_col[GRC_FONT],
1585 im->text_prop[TEXT_PROP_AXIS].font,
1586 im->text_prop[TEXT_PROP_AXIS].size,
1587 im->tabwidth, 0.0, GFX_H_RIGHT, GFX_V_CENTER,
1589 gfx_new_dashed_line ( im->canvas,
1592 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1593 im->grid_dash_on, im->grid_dash_off);
1595 } else if (!(im->extra_flags & NOMINOR)) {
1596 gfx_new_dashed_line ( im->canvas,
1599 GRIDWIDTH, im->graph_col[GRC_GRID],
1600 im->grid_dash_on, im->grid_dash_off);
1608 /* logaritmic horizontal grid */
1610 horizontal_log_grid(image_desc_t *im)
1614 int minoridx=0, majoridx=0;
1615 char graph_label[100];
1617 double value, pixperstep, minstep;
1619 /* find grid spaceing */
1620 pixpex= (double)im->ysize / (log10(im->maxval) - log10(im->minval));
1622 if (isnan(pixpex)) {
1626 for(i=0;yloglab[i][0] > 0;i++){
1627 minstep = log10(yloglab[i][0]);
1628 for(ii=1;yloglab[i][ii+1] > 0;ii++){
1629 if(yloglab[i][ii+2]==0){
1630 minstep = log10(yloglab[i][ii+1])-log10(yloglab[i][ii]);
1634 pixperstep = pixpex * minstep;
1635 if(pixperstep > 5){minoridx = i;}
1636 if(pixperstep > 2 * im->text_prop[TEXT_PROP_LEGEND].size){majoridx = i;}
1640 X1=im->xorigin+im->xsize;
1641 /* paint minor grid */
1642 for (value = pow((double)10, log10(im->minval)
1643 - fmod(log10(im->minval),log10(yloglab[minoridx][0])));
1644 value <= im->maxval;
1645 value *= yloglab[minoridx][0]){
1646 if (value < im->minval) continue;
1648 while(yloglab[minoridx][++i] > 0){
1649 Y0 = ytr(im,value * yloglab[minoridx][i]);
1650 if (Y0 <= im->yorigin - im->ysize) break;
1651 gfx_new_dashed_line ( im->canvas,
1654 GRIDWIDTH, im->graph_col[GRC_GRID],
1655 im->grid_dash_on, im->grid_dash_off);
1659 /* paint major grid and labels*/
1660 for (value = pow((double)10, log10(im->minval)
1661 - fmod(log10(im->minval),log10(yloglab[majoridx][0])));
1662 value <= im->maxval;
1663 value *= yloglab[majoridx][0]){
1664 if (value < im->minval) continue;
1666 while(yloglab[majoridx][++i] > 0){
1667 Y0 = ytr(im,value * yloglab[majoridx][i]);
1668 if (Y0 <= im->yorigin - im->ysize) break;
1669 gfx_new_dashed_line ( im->canvas,
1672 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1673 im->grid_dash_on, im->grid_dash_off);
1675 sprintf(graph_label,"%3.0e",value * yloglab[majoridx][i]);
1676 gfx_new_text ( im->canvas,
1677 X0-im->text_prop[TEXT_PROP_AXIS].size/1.5, Y0,
1678 im->graph_col[GRC_FONT],
1679 im->text_prop[TEXT_PROP_AXIS].font,
1680 im->text_prop[TEXT_PROP_AXIS].size,
1681 im->tabwidth,0.0, GFX_H_RIGHT, GFX_V_CENTER,
1693 int xlab_sel; /* which sort of label and grid ? */
1694 time_t ti, tilab, timajor;
1696 char graph_label[100];
1697 double X0,Y0,Y1; /* points for filled graph and more*/
1700 /* the type of time grid is determined by finding
1701 the number of seconds per pixel in the graph */
1704 if(im->xlab_user.minsec == -1){
1705 factor=(im->end - im->start)/im->xsize;
1707 while ( xlab[xlab_sel+1].minsec != -1
1708 && xlab[xlab_sel+1].minsec <= factor){ xlab_sel++; }
1709 im->xlab_user.gridtm = xlab[xlab_sel].gridtm;
1710 im->xlab_user.gridst = xlab[xlab_sel].gridst;
1711 im->xlab_user.mgridtm = xlab[xlab_sel].mgridtm;
1712 im->xlab_user.mgridst = xlab[xlab_sel].mgridst;
1713 im->xlab_user.labtm = xlab[xlab_sel].labtm;
1714 im->xlab_user.labst = xlab[xlab_sel].labst;
1715 im->xlab_user.precis = xlab[xlab_sel].precis;
1716 im->xlab_user.stst = xlab[xlab_sel].stst;
1719 /* y coords are the same for every line ... */
1721 Y1 = im->yorigin-im->ysize;
1724 /* paint the minor grid */
1725 if (!(im->extra_flags & NOMINOR))
1727 for(ti = find_first_time(im->start,
1728 im->xlab_user.gridtm,
1729 im->xlab_user.gridst),
1730 timajor = find_first_time(im->start,
1731 im->xlab_user.mgridtm,
1732 im->xlab_user.mgridst);
1734 ti = find_next_time(ti,im->xlab_user.gridtm,im->xlab_user.gridst)
1736 /* are we inside the graph ? */
1737 if (ti < im->start || ti > im->end) continue;
1738 while (timajor < ti) {
1739 timajor = find_next_time(timajor,
1740 im->xlab_user.mgridtm, im->xlab_user.mgridst);
1742 if (ti == timajor) continue; /* skip as falls on major grid line */
1744 gfx_new_dashed_line(im->canvas,X0,Y0+1, X0,Y1-1,GRIDWIDTH,
1745 im->graph_col[GRC_GRID],
1746 im->grid_dash_on, im->grid_dash_off);
1751 /* paint the major grid */
1752 for(ti = find_first_time(im->start,
1753 im->xlab_user.mgridtm,
1754 im->xlab_user.mgridst);
1756 ti = find_next_time(ti,im->xlab_user.mgridtm,im->xlab_user.mgridst)
1758 /* are we inside the graph ? */
1759 if (ti < im->start || ti > im->end) continue;
1761 gfx_new_dashed_line(im->canvas,X0,Y0+3, X0,Y1-2,MGRIDWIDTH,
1762 im->graph_col[GRC_MGRID],
1763 im->grid_dash_on, im->grid_dash_off);
1766 /* paint the labels below the graph */
1767 for(ti = find_first_time(im->start,
1768 im->xlab_user.labtm,
1769 im->xlab_user.labst);
1771 ti = find_next_time(ti,im->xlab_user.labtm,im->xlab_user.labst)
1773 tilab= ti + im->xlab_user.precis/2; /* correct time for the label */
1774 /* are we inside the graph ? */
1775 if (ti < im->start || ti > im->end) continue;
1778 localtime_r(&tilab, &tm);
1779 strftime(graph_label,99,im->xlab_user.stst, &tm);
1781 # error "your libc has no strftime I guess we'll abort the exercise here."
1783 gfx_new_text ( im->canvas,
1784 xtr(im,tilab), Y0+im->text_prop[TEXT_PROP_AXIS].size/1.5,
1785 im->graph_col[GRC_FONT],
1786 im->text_prop[TEXT_PROP_AXIS].font,
1787 im->text_prop[TEXT_PROP_AXIS].size,
1788 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_TOP,
1801 /* draw x and y axis */
1802 gfx_new_line ( im->canvas, im->xorigin+im->xsize,im->yorigin,
1803 im->xorigin+im->xsize,im->yorigin-im->ysize,
1804 GRIDWIDTH, im->graph_col[GRC_GRID]);
1806 gfx_new_line ( im->canvas, im->xorigin,im->yorigin-im->ysize,
1807 im->xorigin+im->xsize,im->yorigin-im->ysize,
1808 GRIDWIDTH, im->graph_col[GRC_GRID]);
1810 gfx_new_line ( im->canvas, im->xorigin-4,im->yorigin,
1811 im->xorigin+im->xsize+4,im->yorigin,
1812 MGRIDWIDTH, im->graph_col[GRC_GRID]);
1814 gfx_new_line ( im->canvas, im->xorigin,im->yorigin+4,
1815 im->xorigin,im->yorigin-im->ysize-4,
1816 MGRIDWIDTH, im->graph_col[GRC_GRID]);
1819 /* arrow for X axis direction */
1820 gfx_new_area ( im->canvas,
1821 im->xorigin+im->xsize+3, im->yorigin-3,
1822 im->xorigin+im->xsize+3, im->yorigin+4,
1823 im->xorigin+im->xsize+8, im->yorigin+0.5, /* LINEOFFSET */
1824 im->graph_col[GRC_ARROW]);
1831 grid_paint(image_desc_t *im)
1835 double X0,Y0; /* points for filled graph and more*/
1838 /* draw 3d border */
1839 node = gfx_new_area (im->canvas, 0,im->yimg,
1841 2,2,im->graph_col[GRC_SHADEA]);
1842 gfx_add_point( node , im->ximg - 2, 2 );
1843 gfx_add_point( node , im->ximg, 0 );
1844 gfx_add_point( node , 0,0 );
1845 /* gfx_add_point( node , 0,im->yimg ); */
1847 node = gfx_new_area (im->canvas, 2,im->yimg-2,
1848 im->ximg-2,im->yimg-2,
1850 im->graph_col[GRC_SHADEB]);
1851 gfx_add_point( node , im->ximg,0);
1852 gfx_add_point( node , im->ximg,im->yimg);
1853 gfx_add_point( node , 0,im->yimg);
1854 /* gfx_add_point( node , 0,im->yimg ); */
1857 if (im->draw_x_grid == 1 )
1860 if (im->draw_y_grid == 1){
1861 if(im->logarithmic){
1862 res = horizontal_log_grid(im);
1864 res = draw_horizontal_grid(im);
1867 /* dont draw horizontal grid if there is no min and max val */
1869 char *nodata = "No Data found";
1870 gfx_new_text(im->canvas,im->ximg/2, (2*im->yorigin-im->ysize) / 2,
1871 im->graph_col[GRC_FONT],
1872 im->text_prop[TEXT_PROP_AXIS].font,
1873 im->text_prop[TEXT_PROP_AXIS].size,
1874 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_CENTER,
1879 /* yaxis description */
1880 if (im->canvas->imgformat != IF_PNG) {
1881 gfx_new_text( im->canvas,
1882 7, (im->yorigin - im->ysize/2),
1883 im->graph_col[GRC_FONT],
1884 im->text_prop[TEXT_PROP_AXIS].font,
1885 im->text_prop[TEXT_PROP_AXIS].size, im->tabwidth, 270.0,
1886 GFX_H_CENTER, GFX_V_CENTER,
1889 /* horrible hack until we can actually print vertically */
1892 int l=strlen(im->ylegend);
1894 for (n=0;n<strlen(im->ylegend);n++) {
1895 s[0]=im->ylegend[n];
1897 gfx_new_text(im->canvas,7,im->text_prop[TEXT_PROP_AXIS].size*(l-n),
1898 im->graph_col[GRC_FONT],
1899 im->text_prop[TEXT_PROP_AXIS].font,
1900 im->text_prop[TEXT_PROP_AXIS].size, im->tabwidth, 270.0,
1901 GFX_H_CENTER, GFX_V_CENTER,
1908 gfx_new_text( im->canvas,
1909 im->ximg/2, im->text_prop[TEXT_PROP_TITLE].size,
1910 im->graph_col[GRC_FONT],
1911 im->text_prop[TEXT_PROP_TITLE].font,
1912 im->text_prop[TEXT_PROP_TITLE].size, im->tabwidth, 0.0,
1913 GFX_H_CENTER, GFX_V_CENTER,
1917 if( !(im->extra_flags & NOLEGEND) ) {
1918 for(i=0;i<im->gdes_c;i++){
1919 if(im->gdes[i].legend[0] =='\0')
1922 /* im->gdes[i].leg_y is the bottom of the legend */
1923 X0 = im->gdes[i].leg_x;
1924 Y0 = im->gdes[i].leg_y;
1926 if ( im->gdes[i].gf != GF_GPRINT
1927 && im->gdes[i].gf != GF_COMMENT) {
1930 boxH = gfx_get_text_width(im->canvas, 0,
1931 im->text_prop[TEXT_PROP_AXIS].font,
1932 im->text_prop[TEXT_PROP_AXIS].size,
1933 im->tabwidth,"M") * 1.25;
1936 node = gfx_new_area(im->canvas,
1941 gfx_add_point ( node, X0+boxH, Y0-boxV );
1942 node = gfx_new_line(im->canvas,
1945 gfx_add_point(node,X0+boxH,Y0);
1946 gfx_add_point(node,X0+boxH,Y0-boxV);
1947 gfx_close_path(node);
1948 X0 += boxH / 1.25 * 2;
1950 gfx_new_text ( im->canvas, X0, Y0,
1951 im->graph_col[GRC_FONT],
1952 im->text_prop[TEXT_PROP_AXIS].font,
1953 im->text_prop[TEXT_PROP_AXIS].size,
1954 im->tabwidth,0.0, GFX_H_LEFT, GFX_V_BOTTOM,
1955 im->gdes[i].legend );
1961 /*****************************************************
1962 * lazy check make sure we rely need to create this graph
1963 *****************************************************/
1965 int lazy_check(image_desc_t *im){
1968 struct stat imgstat;
1970 if (im->lazy == 0) return 0; /* no lazy option */
1971 if (stat(im->graphfile,&imgstat) != 0)
1972 return 0; /* can't stat */
1973 /* one pixel in the existing graph is more then what we would
1975 if (time(NULL) - imgstat.st_mtime >
1976 (im->end - im->start) / im->xsize)
1978 if ((fd = fopen(im->graphfile,"rb")) == NULL)
1979 return 0; /* the file does not exist */
1980 switch (im->canvas->imgformat) {
1982 size = PngSize(fd,&(im->ximg),&(im->yimg));
1992 pie_part(image_desc_t *im, gfx_color_t color,
1993 double PieCenterX, double PieCenterY, double Radius,
1994 double startangle, double endangle)
1998 double step=M_PI/50; /* Number of iterations for the circle;
1999 ** 10 is definitely too low, more than
2000 ** 50 seems to be overkill
2003 /* Strange but true: we have to work clockwise or else
2004 ** anti aliasing nor transparency don't work.
2006 ** This test is here to make sure we do it right, also
2007 ** this makes the for...next loop more easy to implement.
2008 ** The return will occur if the user enters a negative number
2009 ** (which shouldn't be done according to the specs) or if the
2010 ** programmers do something wrong (which, as we all know, never
2011 ** happens anyway :)
2013 if (endangle<startangle) return;
2015 /* Hidden feature: Radius decreases each full circle */
2017 while (angle>=2*M_PI) {
2022 node=gfx_new_area(im->canvas,
2023 PieCenterX+sin(startangle)*Radius,
2024 PieCenterY-cos(startangle)*Radius,
2027 PieCenterX+sin(endangle)*Radius,
2028 PieCenterY-cos(endangle)*Radius,
2030 for (angle=endangle;angle-startangle>=step;angle-=step) {
2032 PieCenterX+sin(angle)*Radius,
2033 PieCenterY-cos(angle)*Radius );
2038 graph_size_location(image_desc_t *im, int elements, int piechart )
2040 /* The actual size of the image to draw is determined from
2041 ** several sources. The size given on the command line is
2042 ** the graph area but we need more as we have to draw labels
2043 ** and other things outside the graph area
2046 /* +-+-------------------------------------------+
2047 ** |l|.................title.....................|
2048 ** |e+--+-------------------------------+--------+
2051 ** |l| l| main graph area | chart |
2054 ** |r+--+-------------------------------+--------+
2055 ** |e| | x-axis labels | |
2056 ** |v+--+-------------------------------+--------+
2057 ** | |..............legends......................|
2058 ** +-+-------------------------------------------+
2060 int Xvertical=0, Yvertical=0,
2061 Xtitle =0, Ytitle =0,
2062 Xylabel =0, Yylabel =0,
2065 Xxlabel =0, Yxlabel =0,
2067 Xlegend =0, Ylegend =0,
2069 Xspacing =10, Yspacing =10;
2071 if (im->ylegend[0] != '\0') {
2072 Xvertical = im->text_prop[TEXT_PROP_LEGEND].size *2;
2073 Yvertical = im->text_prop[TEXT_PROP_LEGEND].size * (strlen(im->ylegend)+1);
2076 if (im->title[0] != '\0') {
2077 /* The title is placed "inbetween" two text lines so it
2078 ** automatically has some vertical spacing. The horizontal
2079 ** spacing is added here, on each side.
2081 Xtitle = gfx_get_text_width(im->canvas, 0,
2082 im->text_prop[TEXT_PROP_TITLE].font,
2083 im->text_prop[TEXT_PROP_TITLE].size,
2085 im->title) + 2*Xspacing;
2086 Ytitle = im->text_prop[TEXT_PROP_TITLE].size*2;
2092 if (im->draw_x_grid) {
2094 Yxlabel=im->text_prop[TEXT_PROP_LEGEND].size *2;
2096 if (im->draw_y_grid) {
2097 Xylabel=im->text_prop[TEXT_PROP_LEGEND].size *6;
2103 im->piesize=im->xsize<im->ysize?im->xsize:im->ysize;
2108 /* Now calculate the total size. Insert some spacing where
2109 desired. im->xorigin and im->yorigin need to correspond
2110 with the lower left corner of the main graph area or, if
2111 this one is not set, the imaginary box surrounding the
2114 /* The legend width cannot yet be determined, as a result we
2115 ** have problems adjusting the image to it. For now, we just
2116 ** forget about it at all; the legend will have to fit in the
2117 ** size already allocated.
2119 im->ximg = Xylabel + Xmain + Xpie + Xspacing;
2120 if (Xmain) im->ximg += Xspacing;
2121 if (Xpie) im->ximg += Xspacing;
2122 im->xorigin = Xspacing + Xylabel;
2123 if (Xtitle > im->ximg) im->ximg = Xtitle;
2125 im->ximg += Xvertical;
2126 im->xorigin += Xvertical;
2130 /* The vertical size is interesting... we need to compare
2131 ** the sum of {Ytitle, Ymain, Yxlabel, Ylegend} with Yvertical
2132 ** however we need to know {Ytitle+Ymain+Yxlabel} in order to
2133 ** start even thinking about Ylegend.
2135 ** Do it in three portions: First calculate the inner part,
2136 ** then do the legend, then adjust the total height of the img.
2139 /* reserve space for main and/or pie */
2140 im->yimg = Ymain + Yxlabel;
2141 if (im->yimg < Ypie) im->yimg = Ypie;
2142 im->yorigin = im->yimg - Yxlabel;
2143 /* reserve space for the title *or* some padding above the graph */
2146 im->yorigin += Ytitle;
2148 im->yimg += Yspacing;
2149 im->yorigin += Yspacing;
2151 /* reserve space for padding below the graph */
2152 im->yimg += Yspacing;
2155 /* Determine where to place the legends onto the image.
2156 ** Adjust im->yimg to match the space requirements.
2158 if(leg_place(im)==-1)
2161 /* last of three steps: check total height of image */
2162 if (im->yimg < Yvertical) im->yimg = Yvertical;
2165 if (Xlegend > im->ximg) {
2167 /* reposition Pie */
2171 /* The pie is placed in the upper right hand corner,
2172 ** just below the title (if any) and with sufficient
2176 im->pie_x = im->ximg - Xspacing - Xpie/2;
2177 im->pie_y = im->yorigin-Ymain+Ypie/2;
2179 im->pie_x = im->ximg/2;
2180 im->pie_y = im->yorigin-Ypie/2;
2186 /* draw that picture thing ... */
2188 graph_paint(image_desc_t *im, char ***calcpr)
2191 int lazy = lazy_check(im);
2193 double PieStart=0.0;
2197 double areazero = 0.0;
2198 enum gf_en stack_gf = GF_PRINT;
2199 graph_desc_t *lastgdes = NULL;
2201 /* if we are lazy and there is nothing to PRINT ... quit now */
2202 if (lazy && im->prt_c==0) return 0;
2204 /* pull the data from the rrd files ... */
2206 if(data_fetch(im)==-1)
2209 /* evaluate VDEF and CDEF operations ... */
2210 if(data_calc(im)==-1)
2213 /* check if we need to draw a piechart */
2214 for(i=0;i<im->gdes_c;i++){
2215 if (im->gdes[i].gf == GF_PART) {
2221 /* calculate and PRINT and GPRINT definitions. We have to do it at
2222 * this point because it will affect the length of the legends
2223 * if there are no graph elements we stop here ...
2224 * if we are lazy, try to quit ...
2226 i=print_calc(im,calcpr);
2228 if(((i==0)&&(piechart==0)) || lazy) return 0;
2230 /* If there's only the pie chart to draw, signal this */
2231 if (i==0) piechart=2;
2233 /* get actual drawing data and find min and max values*/
2234 if(data_proc(im)==-1)
2237 if(!im->logarithmic){si_unit(im);} /* identify si magnitude Kilo, Mega Giga ? */
2239 if(!im->rigid && ! im->logarithmic)
2240 expand_range(im); /* make sure the upper and lower limit are
2243 if (!calc_horizontal_grid(im))
2248 /**************************************************************
2249 *** Calculating sizes and locations became a bit confusing ***
2250 *** so I moved this into a separate function. ***
2251 **************************************************************/
2252 if(graph_size_location(im,i,piechart)==-1)
2255 /* the actual graph is created by going through the individual
2256 graph elements and then drawing them */
2258 node=gfx_new_area ( im->canvas,
2262 im->graph_col[GRC_BACK]);
2264 gfx_add_point(node,0, im->yimg);
2266 if (piechart != 2) {
2267 node=gfx_new_area ( im->canvas,
2268 im->xorigin, im->yorigin,
2269 im->xorigin + im->xsize, im->yorigin,
2270 im->xorigin + im->xsize, im->yorigin-im->ysize,
2271 im->graph_col[GRC_CANVAS]);
2273 gfx_add_point(node,im->xorigin, im->yorigin - im->ysize);
2275 if (im->minval > 0.0)
2276 areazero = im->minval;
2277 if (im->maxval < 0.0)
2278 areazero = im->maxval;
2284 pie_part(im,im->graph_col[GRC_CANVAS],im->pie_x,im->pie_y,im->piesize*0.5,0,2*M_PI);
2287 for(i=0;i<im->gdes_c;i++){
2288 switch(im->gdes[i].gf){
2300 for (ii = 0; ii < im->xsize; ii++)
2302 if (!isnan(im->gdes[i].p_data[ii]) &&
2303 im->gdes[i].p_data[ii] > 0.0)
2305 /* generate a tick */
2306 gfx_new_line(im->canvas, im -> xorigin + ii,
2307 im -> yorigin - (im -> gdes[i].yrule * im -> ysize),
2311 im -> gdes[i].col );
2317 stack_gf = im->gdes[i].gf;
2319 /* fix data points at oo and -oo */
2320 for(ii=0;ii<im->xsize;ii++){
2321 if (isinf(im->gdes[i].p_data[ii])){
2322 if (im->gdes[i].p_data[ii] > 0) {
2323 im->gdes[i].p_data[ii] = im->maxval ;
2325 im->gdes[i].p_data[ii] = im->minval ;
2331 if (im->gdes[i].col != 0x0){
2332 /* GF_LINE and friend */
2333 if(stack_gf == GF_LINE ){
2335 for(ii=1;ii<im->xsize;ii++){
2336 if ( ! isnan(im->gdes[i].p_data[ii-1])
2337 && ! isnan(im->gdes[i].p_data[ii])){
2339 node = gfx_new_line(im->canvas,
2340 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii-1]),
2341 ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]),
2342 im->gdes[i].linewidth,
2345 gfx_add_point(node,ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]));
2354 for(ii=1;ii<im->xsize;ii++){
2356 if ( ! isnan(im->gdes[i].p_data[ii-1])
2357 && ! isnan(im->gdes[i].p_data[ii])){
2361 if (im->gdes[i].gf == GF_STACK) {
2363 if ( (im->gdes[i].gf == GF_STACK)
2364 || (im->gdes[i].stack) ) {
2366 ybase = ytr(im,lastgdes->p_data[ii-1]);
2368 ybase = ytr(im,areazero);
2371 node = gfx_new_area(im->canvas,
2372 ii-1+im->xorigin,ybase,
2373 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii-1]),
2374 ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]),
2378 gfx_add_point(node,ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]));
2382 if ( node != NULL && (ii+1==im->xsize || isnan(im->gdes[i].p_data[ii]) )){
2383 /* GF_AREA STACK type*/
2385 if (im->gdes[i].gf == GF_STACK ) {
2387 if ( (im->gdes[i].gf == GF_STACK)
2388 || (im->gdes[i].stack) ) {
2390 for (iii=ii-1;iii>area_start;iii--){
2391 gfx_add_point(node,iii+im->xorigin,ytr(im,lastgdes->p_data[iii]));
2394 gfx_add_point(node,ii+im->xorigin,ytr(im,areazero));
2399 } /* else GF_LINE */
2400 } /* if color != 0x0 */
2401 /* make sure we do not run into trouble when stacking on NaN */
2402 for(ii=0;ii<im->xsize;ii++){
2403 if (isnan(im->gdes[i].p_data[ii])) {
2404 if (lastgdes && (im->gdes[i].gf == GF_STACK)) {
2405 im->gdes[i].p_data[ii] = lastgdes->p_data[ii];
2407 im->gdes[i].p_data[ii] = ytr(im,areazero);
2411 lastgdes = &(im->gdes[i]);
2414 if(isnan(im->gdes[i].yrule)) /* fetch variable */
2415 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2417 if (finite(im->gdes[i].yrule)) { /* even the fetched var can be NaN */
2418 pie_part(im,im->gdes[i].col,
2419 im->pie_x,im->pie_y,im->piesize*0.4,
2420 M_PI*2.0*PieStart/100.0,
2421 M_PI*2.0*(PieStart+im->gdes[i].yrule)/100.0);
2422 PieStart += im->gdes[i].yrule;
2431 /* grid_paint also does the text */
2434 /* the RULES are the last thing to paint ... */
2435 for(i=0;i<im->gdes_c;i++){
2437 switch(im->gdes[i].gf){
2439 if(isnan(im->gdes[i].yrule)) { /* fetch variable */
2440 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2442 if(im->gdes[i].yrule >= im->minval
2443 && im->gdes[i].yrule <= im->maxval)
2444 gfx_new_line(im->canvas,
2445 im->xorigin,ytr(im,im->gdes[i].yrule),
2446 im->xorigin+im->xsize,ytr(im,im->gdes[i].yrule),
2447 1.0,im->gdes[i].col);
2450 if(im->gdes[i].xrule == 0) { /* fetch variable */
2451 im->gdes[i].xrule = im->gdes[im->gdes[i].vidx].vf.when;
2453 if(im->gdes[i].xrule >= im->start
2454 && im->gdes[i].xrule <= im->end)
2455 gfx_new_line(im->canvas,
2456 xtr(im,im->gdes[i].xrule),im->yorigin,
2457 xtr(im,im->gdes[i].xrule),im->yorigin-im->ysize,
2458 1.0,im->gdes[i].col);
2466 if (strcmp(im->graphfile,"-")==0) {
2468 /* Change translation mode for stdout to BINARY */
2469 _setmode( _fileno( stdout ), O_BINARY );
2473 if ((fo = fopen(im->graphfile,"wb")) == NULL) {
2474 rrd_set_error("Opening '%s' for write: %s",im->graphfile,
2475 rrd_strerror(errno));
2479 gfx_render (im->canvas,im->ximg,im->yimg,0x0,fo);
2480 if (strcmp(im->graphfile,"-") != 0)
2486 /*****************************************************
2488 *****************************************************/
2491 gdes_alloc(image_desc_t *im){
2493 unsigned long def_step = (im->end-im->start)/im->xsize;
2495 if (im->step > def_step) /* step can be increassed ... no decreassed */
2496 def_step = im->step;
2500 if ((im->gdes = (graph_desc_t *) rrd_realloc(im->gdes, (im->gdes_c)
2501 * sizeof(graph_desc_t)))==NULL){
2502 rrd_set_error("realloc graph_descs");
2507 im->gdes[im->gdes_c-1].step=def_step;
2508 im->gdes[im->gdes_c-1].stack=0;
2509 im->gdes[im->gdes_c-1].debug=0;
2510 im->gdes[im->gdes_c-1].start=im->start;
2511 im->gdes[im->gdes_c-1].end=im->end;
2512 im->gdes[im->gdes_c-1].vname[0]='\0';
2513 im->gdes[im->gdes_c-1].data=NULL;
2514 im->gdes[im->gdes_c-1].ds_namv=NULL;
2515 im->gdes[im->gdes_c-1].data_first=0;
2516 im->gdes[im->gdes_c-1].p_data=NULL;
2517 im->gdes[im->gdes_c-1].rpnp=NULL;
2518 im->gdes[im->gdes_c-1].col = 0x0;
2519 im->gdes[im->gdes_c-1].legend[0]='\0';
2520 im->gdes[im->gdes_c-1].rrd[0]='\0';
2521 im->gdes[im->gdes_c-1].ds=-1;
2522 im->gdes[im->gdes_c-1].p_data=NULL;
2523 im->gdes[im->gdes_c-1].yrule=DNAN;
2524 im->gdes[im->gdes_c-1].xrule=0;
2528 /* copies input untill the first unescaped colon is found
2529 or until input ends. backslashes have to be escaped as well */
2531 scan_for_col(char *input, int len, char *output)
2536 input[inp] != ':' &&
2539 if (input[inp] == '\\' &&
2540 input[inp+1] != '\0' &&
2541 (input[inp+1] == '\\' ||
2542 input[inp+1] == ':')){
2543 output[outp++] = input[++inp];
2546 output[outp++] = input[inp];
2549 output[outp] = '\0';
2552 /* Some surgery done on this function, it became ridiculously big.
2554 ** - initializing now in rrd_graph_init()
2555 ** - options parsing now in rrd_graph_options()
2556 ** - script parsing now in rrd_graph_script()
2559 rrd_graph(int argc, char **argv, char ***prdata, int *xsize, int *ysize)
2563 rrd_graph_init(&im);
2565 rrd_graph_options(argc,argv,&im);
2566 if (rrd_test_error()) {
2571 if (strlen(argv[optind])>=MAXPATH) {
2572 rrd_set_error("filename (including path) too long");
2576 strncpy(im.graphfile,argv[optind],MAXPATH-1);
2577 im.graphfile[MAXPATH-1]='\0';
2579 rrd_graph_script(argc,argv,&im);
2580 if (rrd_test_error()) {
2585 /* Everything is now read and the actual work can start */
2588 if (graph_paint(&im,prdata)==-1){
2593 /* The image is generated and needs to be output.
2594 ** Also, if needed, print a line with information about the image.
2602 /* maybe prdata is not allocated yet ... lets do it now */
2603 if ((*prdata = calloc(2,sizeof(char *)))==NULL) {
2604 rrd_set_error("malloc imginfo");
2608 if(((*prdata)[0] = malloc((strlen(im.imginfo)+200+strlen(im.graphfile))*sizeof(char)))
2610 rrd_set_error("malloc imginfo");
2613 filename=im.graphfile+strlen(im.graphfile);
2614 while(filename > im.graphfile) {
2615 if (*(filename-1)=='/' || *(filename-1)=='\\' ) break;
2619 sprintf((*prdata)[0],im.imginfo,filename,(long)(im.canvas->zoom*im.ximg),(long)(im.canvas->zoom*im.yimg));
2626 rrd_graph_init(image_desc_t *im)
2633 #ifdef HAVE_SETLOCALE
2634 setlocale(LC_TIME,"");
2637 im->xlab_user.minsec = -1;
2643 im->ylegend[0] = '\0';
2644 im->title[0] = '\0';
2647 im->unitsexponent= 9999;
2653 im->logarithmic = 0;
2654 im->ygridstep = DNAN;
2655 im->draw_x_grid = 1;
2656 im->draw_y_grid = 1;
2661 im->canvas = gfx_new_canvas();
2662 im->grid_dash_on = 1;
2663 im->grid_dash_off = 1;
2665 for(i=0;i<DIM(graph_col);i++)
2666 im->graph_col[i]=graph_col[i];
2668 for(i=0;i<DIM(text_prop);i++){
2669 im->text_prop[i].size = text_prop[i].size;
2670 im->text_prop[i].font = text_prop[i].font;
2675 rrd_graph_options(int argc, char *argv[],image_desc_t *im)
2678 char *parsetime_error = NULL;
2679 char scan_gtm[12],scan_mtm[12],scan_ltm[12],col_nam[12];
2680 time_t start_tmp=0,end_tmp=0;
2682 struct time_value start_tv, end_tv;
2685 parsetime("end-24h", &start_tv);
2686 parsetime("now", &end_tv);
2689 static struct option long_options[] =
2691 {"start", required_argument, 0, 's'},
2692 {"end", required_argument, 0, 'e'},
2693 {"x-grid", required_argument, 0, 'x'},
2694 {"y-grid", required_argument, 0, 'y'},
2695 {"vertical-label",required_argument,0,'v'},
2696 {"width", required_argument, 0, 'w'},
2697 {"height", required_argument, 0, 'h'},
2698 {"interlaced", no_argument, 0, 'i'},
2699 {"upper-limit",required_argument, 0, 'u'},
2700 {"lower-limit",required_argument, 0, 'l'},
2701 {"rigid", no_argument, 0, 'r'},
2702 {"base", required_argument, 0, 'b'},
2703 {"logarithmic",no_argument, 0, 'o'},
2704 {"color", required_argument, 0, 'c'},
2705 {"font", required_argument, 0, 'n'},
2706 {"title", required_argument, 0, 't'},
2707 {"imginfo", required_argument, 0, 'f'},
2708 {"imgformat", required_argument, 0, 'a'},
2709 {"lazy", no_argument, 0, 'z'},
2710 {"zoom", required_argument, 0, 'm'},
2711 {"no-legend", no_argument, 0, 'g'},
2712 {"alt-y-grid", no_argument, 0, 'Y'},
2713 {"no-minor", no_argument, 0, 'I'},
2714 {"alt-autoscale", no_argument, 0, 'A'},
2715 {"alt-autoscale-max", no_argument, 0, 'M'},
2716 {"units-exponent",required_argument, 0, 'X'},
2717 {"step", required_argument, 0, 'S'},
2718 {"no-gridfit", no_argument, 0, 'N'},
2720 int option_index = 0;
2724 opt = getopt_long(argc, argv,
2725 "s:e:x:y:v:w:h:iu:l:rb:oc:n:m:t:f:a:I:zgYAMX:S:N",
2726 long_options, &option_index);
2733 im->extra_flags |= NOMINOR;
2736 im->extra_flags |= ALTYGRID;
2739 im->extra_flags |= ALTAUTOSCALE;
2742 im->extra_flags |= ALTAUTOSCALE_MAX;
2745 im->extra_flags |= NOLEGEND;
2748 im->unitsexponent = atoi(optarg);
2751 im->step = atoi(optarg);
2757 if ((parsetime_error = parsetime(optarg, &start_tv))) {
2758 rrd_set_error( "start time: %s", parsetime_error );
2763 if ((parsetime_error = parsetime(optarg, &end_tv))) {
2764 rrd_set_error( "end time: %s", parsetime_error );
2769 if(strcmp(optarg,"none") == 0){
2775 "%10[A-Z]:%ld:%10[A-Z]:%ld:%10[A-Z]:%ld:%ld:%n",
2777 &im->xlab_user.gridst,
2779 &im->xlab_user.mgridst,
2781 &im->xlab_user.labst,
2782 &im->xlab_user.precis,
2783 &stroff) == 7 && stroff != 0){
2784 strncpy(im->xlab_form, optarg+stroff, sizeof(im->xlab_form) - 1);
2785 if((im->xlab_user.gridtm = tmt_conv(scan_gtm)) == -1){
2786 rrd_set_error("unknown keyword %s",scan_gtm);
2788 } else if ((im->xlab_user.mgridtm = tmt_conv(scan_mtm)) == -1){
2789 rrd_set_error("unknown keyword %s",scan_mtm);
2791 } else if ((im->xlab_user.labtm = tmt_conv(scan_ltm)) == -1){
2792 rrd_set_error("unknown keyword %s",scan_ltm);
2795 im->xlab_user.minsec = 1;
2796 im->xlab_user.stst = im->xlab_form;
2798 rrd_set_error("invalid x-grid format");
2804 if(strcmp(optarg,"none") == 0){
2812 &im->ylabfact) == 2) {
2813 if(im->ygridstep<=0){
2814 rrd_set_error("grid step must be > 0");
2816 } else if (im->ylabfact < 1){
2817 rrd_set_error("label factor must be > 0");
2821 rrd_set_error("invalid y-grid format");
2826 strncpy(im->ylegend,optarg,150);
2827 im->ylegend[150]='\0';
2830 im->maxval = atof(optarg);
2833 im->minval = atof(optarg);
2836 im->base = atol(optarg);
2837 if(im->base != 1024 && im->base != 1000 ){
2838 rrd_set_error("the only sensible value for base apart from 1000 is 1024");
2843 long_tmp = atol(optarg);
2844 if (long_tmp < 10) {
2845 rrd_set_error("width below 10 pixels");
2848 im->xsize = long_tmp;
2851 long_tmp = atol(optarg);
2852 if (long_tmp < 10) {
2853 rrd_set_error("height below 10 pixels");
2856 im->ysize = long_tmp;
2859 im->canvas->interlaced = 1;
2865 im->imginfo = optarg;
2868 if((im->canvas->imgformat = if_conv(optarg)) == -1) {
2869 rrd_set_error("unsupported graphics format '%s'",optarg);
2877 im->logarithmic = 1;
2878 if (isnan(im->minval))
2884 col_nam,&color) == 2){
2886 if((ci=grc_conv(col_nam)) != -1){
2887 im->graph_col[ci]=color;
2889 rrd_set_error("invalid color name '%s'",col_nam);
2892 rrd_set_error("invalid color def format");
2897 /* originally this used char *prop = "" and
2898 ** char *font = "dummy" however this results
2899 ** in a SEG fault, at least on RH7.1
2901 ** The current implementation isn't proper
2902 ** either, font is never freed and prop uses
2903 ** a fixed width string
2912 prop,&size,font) == 3){
2914 if((sindex=text_prop_conv(prop)) != -1){
2915 im->text_prop[sindex].size=size;
2916 im->text_prop[sindex].font=font;
2917 if (sindex==0) { /* the default */
2918 im->text_prop[TEXT_PROP_TITLE].size=size;
2919 im->text_prop[TEXT_PROP_TITLE].font=font;
2920 im->text_prop[TEXT_PROP_AXIS].size=size;
2921 im->text_prop[TEXT_PROP_AXIS].font=font;
2922 im->text_prop[TEXT_PROP_UNIT].size=size;
2923 im->text_prop[TEXT_PROP_UNIT].font=font;
2924 im->text_prop[TEXT_PROP_LEGEND].size=size;
2925 im->text_prop[TEXT_PROP_LEGEND].font=font;
2928 rrd_set_error("invalid fonttag '%s'",prop);
2932 rrd_set_error("invalid text property format");
2938 im->canvas->zoom = atof(optarg);
2939 if (im->canvas->zoom <= 0.0) {
2940 rrd_set_error("zoom factor must be > 0");
2945 strncpy(im->title,optarg,150);
2946 im->title[150]='\0';
2951 rrd_set_error("unknown option '%c'", optopt);
2953 rrd_set_error("unknown option '%s'",argv[optind-1]);
2958 if (optind >= argc) {
2959 rrd_set_error("missing filename");
2963 if (im->logarithmic == 1 && (im->minval <= 0 || isnan(im->minval))){
2964 rrd_set_error("for a logarithmic yaxis you must specify a lower-limit > 0");
2968 if (proc_start_end(&start_tv,&end_tv,&start_tmp,&end_tmp) == -1){
2969 /* error string is set in parsetime.c */
2973 if (start_tmp < 3600*24*365*10){
2974 rrd_set_error("the first entry to fetch should be after 1980 (%ld)",start_tmp);
2978 if (end_tmp < start_tmp) {
2979 rrd_set_error("start (%ld) should be less than end (%ld)",
2980 start_tmp, end_tmp);
2984 im->start = start_tmp;
2989 rrd_graph_check_vname(image_desc_t *im, char *varname, char *err)
2991 if ((im->gdes[im->gdes_c-1].vidx=find_var(im,varname))==-1) {
2992 rrd_set_error("Unknown variable '%s' in %s",varname,err);
2998 rrd_graph_color(image_desc_t *im, char *var, char *err, int optional)
3001 graph_desc_t *gdp=&im->gdes[im->gdes_c-1];
3003 color=strstr(var,"#");
3006 rrd_set_error("Found no color in %s",err);
3015 rest=strstr(color,":");
3023 sscanf(color,"#%6lx%n",&col,&n);
3024 col = (col << 8) + 0xff /* shift left by 8 */;
3025 if (n!=7) rrd_set_error("Color problem in %s",err);
3028 sscanf(color,"#%8lx%n",&col,&n);
3031 rrd_set_error("Color problem in %s",err);
3033 if (rrd_test_error()) return 0;
3039 rrd_graph_legend(graph_desc_t *gdp, char *line)
3043 i=scan_for_col(line,FMT_LEG_LEN,gdp->legend);
3045 return (strlen(&line[i])==0);
3049 int bad_format(char *fmt) {
3053 while (*ptr != '\0')
3054 if (*ptr++ == '%') {
3056 /* line cannot end with percent char */
3057 if (*ptr == '\0') return 1;
3059 /* '%s', '%S' and '%%' are allowed */
3060 if (*ptr == 's' || *ptr == 'S' || *ptr == '%') ptr++;
3062 /* or else '% 6.2lf' and such are allowed */
3065 /* optional padding character */
3066 if (*ptr == ' ' || *ptr == '+' || *ptr == '-') ptr++;
3068 /* This should take care of 'm.n' with all three optional */
3069 while (*ptr >= '0' && *ptr <= '9') ptr++;
3070 if (*ptr == '.') ptr++;
3071 while (*ptr >= '0' && *ptr <= '9') ptr++;
3073 /* Either 'le', 'lf' or 'lg' must follow here */
3074 if (*ptr++ != 'l') return 1;
3075 if (*ptr == 'e' || *ptr == 'f' || *ptr == 'g') ptr++;
3086 vdef_parse(gdes,str)
3087 struct graph_desc_t *gdes;
3090 /* A VDEF currently is either "func" or "param,func"
3091 * so the parsing is rather simple. Change if needed.
3098 sscanf(str,"%le,%29[A-Z]%n",¶m,func,&n);
3099 if (n==strlen(str)) { /* matched */
3103 sscanf(str,"%29[A-Z]%n",func,&n);
3104 if (n==strlen(str)) { /* matched */
3107 rrd_set_error("Unknown function string '%s' in VDEF '%s'"
3114 if (!strcmp("PERCENT",func)) gdes->vf.op = VDEF_PERCENT;
3115 else if (!strcmp("MAXIMUM",func)) gdes->vf.op = VDEF_MAXIMUM;
3116 else if (!strcmp("AVERAGE",func)) gdes->vf.op = VDEF_AVERAGE;
3117 else if (!strcmp("MINIMUM",func)) gdes->vf.op = VDEF_MINIMUM;
3118 else if (!strcmp("TOTAL", func)) gdes->vf.op = VDEF_TOTAL;
3119 else if (!strcmp("FIRST", func)) gdes->vf.op = VDEF_FIRST;
3120 else if (!strcmp("LAST", func)) gdes->vf.op = VDEF_LAST;
3122 rrd_set_error("Unknown function '%s' in VDEF '%s'\n"
3129 switch (gdes->vf.op) {
3131 if (isnan(param)) { /* no parameter given */
3132 rrd_set_error("Function '%s' needs parameter in VDEF '%s'\n"
3138 if (param>=0.0 && param<=100.0) {
3139 gdes->vf.param = param;
3140 gdes->vf.val = DNAN; /* undefined */
3141 gdes->vf.when = 0; /* undefined */
3143 rrd_set_error("Parameter '%f' out of range in VDEF '%s'\n"
3157 gdes->vf.param = DNAN;
3158 gdes->vf.val = DNAN;
3161 rrd_set_error("Function '%s' needs no parameter in VDEF '%s'\n"
3178 graph_desc_t *src,*dst;
3182 dst = &im->gdes[gdi];
3183 src = &im->gdes[dst->vidx];
3184 data = src->data + src->ds;
3185 steps = (src->end - src->start) / src->step;
3188 printf("DEBUG: start == %lu, end == %lu, %lu steps\n"
3195 switch (dst->vf.op) {
3196 case VDEF_PERCENT: {
3197 rrd_value_t * array;
3201 if ((array = malloc(steps*sizeof(double)))==NULL) {
3202 rrd_set_error("malloc VDEV_PERCENT");
3205 for (step=0;step < steps; step++) {
3206 array[step]=data[step*src->ds_cnt];
3208 qsort(array,step,sizeof(double),vdef_percent_compar);
3210 field = (steps-1)*dst->vf.param/100;
3211 dst->vf.val = array[field];
3212 dst->vf.when = 0; /* no time component */
3215 for(step=0;step<steps;step++)
3216 printf("DEBUG: %3li:%10.2f %c\n",step,array[step],step==field?'*':' ');
3222 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3223 if (step == steps) {
3227 dst->vf.val = data[step*src->ds_cnt];
3228 dst->vf.when = src->start + (step+1)*src->step;
3230 while (step != steps) {
3231 if (finite(data[step*src->ds_cnt])) {
3232 if (data[step*src->ds_cnt] > dst->vf.val) {
3233 dst->vf.val = data[step*src->ds_cnt];
3234 dst->vf.when = src->start + (step+1)*src->step;
3241 case VDEF_AVERAGE: {
3244 for (step=0;step<steps;step++) {
3245 if (finite(data[step*src->ds_cnt])) {
3246 sum += data[step*src->ds_cnt];
3251 if (dst->vf.op == VDEF_TOTAL) {
3252 dst->vf.val = sum*src->step;
3253 dst->vf.when = cnt*src->step; /* not really "when" */
3255 dst->vf.val = sum/cnt;
3256 dst->vf.when = 0; /* no time component */
3266 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3267 if (step == steps) {
3271 dst->vf.val = data[step*src->ds_cnt];
3272 dst->vf.when = src->start + (step+1)*src->step;
3274 while (step != steps) {
3275 if (finite(data[step*src->ds_cnt])) {
3276 if (data[step*src->ds_cnt] < dst->vf.val) {
3277 dst->vf.val = data[step*src->ds_cnt];
3278 dst->vf.when = src->start + (step+1)*src->step;
3285 /* The time value returned here is one step before the
3286 * actual time value. This is the start of the first
3290 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3291 if (step == steps) { /* all entries were NaN */
3295 dst->vf.val = data[step*src->ds_cnt];
3296 dst->vf.when = src->start + step*src->step;
3300 /* The time value returned here is the
3301 * actual time value. This is the end of the last
3305 while (step >= 0 && isnan(data[step*src->ds_cnt])) step--;
3306 if (step < 0) { /* all entries were NaN */
3310 dst->vf.val = data[step*src->ds_cnt];
3311 dst->vf.when = src->start + (step+1)*src->step;
3318 /* NaN < -INF < finite_values < INF */
3320 vdef_percent_compar(a,b)
3323 /* Equality is not returned; this doesn't hurt except
3324 * (maybe) for a little performance.
3327 /* First catch NaN values. They are smallest */
3328 if (isnan( *(double *)a )) return -1;
3329 if (isnan( *(double *)b )) return 1;
3331 /* NaN doesn't reach this part so INF and -INF are extremes.
3332 * The sign from isinf() is compatible with the sign we return
3334 if (isinf( *(double *)a )) return isinf( *(double *)a );
3335 if (isinf( *(double *)b )) return isinf( *(double *)b );
3337 /* If we reach this, both values must be finite */
3338 if ( *(double *)a < *(double *)b ) return -1; else return 1;