src/rrd2json.c

   1 #ifdef HAVE_CONFIG_H
   2 #include <config.h>
   3 #endif
   4 #include <pthread.h>
   5 #include <stdlib.h>
   6 #include <string.h>
   7 #include <stdint.h>
   8 #include <math.h>
   9
  10 #include "log.h"
  11 #include "common.h"
  12 #include "rrd2json.h"
  13
  14 #define HOSTNAME_MAX 1024
  15 char *hostname = "unknown";
  16
  17 void rrd_stats_api_v1_chart(RRDSET *st, BUFFER *wb)
  18 {
  19         pthread_rwlock_rdlock(&st->rwlock);
  20
  21         buffer_sprintf(wb,
  22                 "\t\t{\n"
  23                 "\t\t\t\"id\": \"%s\",\n"
  24                 "\t\t\t\"name\": \"%s\",\n"
  25                 "\t\t\t\"type\": \"%s\",\n"
  26                 "\t\t\t\"family\": \"%s\",\n"
  27                 "\t\t\t\"context\": \"%s\",\n"
  28                 "\t\t\t\"title\": \"%s\",\n"
  29                 "\t\t\t\"priority\": %ld,\n"
  30                 "\t\t\t\"enabled\": %s,\n"
  31                 "\t\t\t\"units\": \"%s\",\n"
  32                 "\t\t\t\"data_url\": \"/api/v1/data?chart=%s\",\n"
  33                 "\t\t\t\"chart_type\": \"%s\",\n"
  34                 "\t\t\t\"duration\": %ld,\n"
  35                 "\t\t\t\"first_entry\": %lu,\n"
  36                 "\t\t\t\"last_entry\": %lu,\n"
  37                 "\t\t\t\"update_every\": %d,\n"
  38                 "\t\t\t\"dimensions\": {\n"
  39                 , st->id
  40                 , st->name
  41                 , st->type
  42                 , st->family
  43                 , st->context
  44                 , st->title
  45                 , st->priority
  46                 , st->enabled?"true":"false"
  47                 , st->units
  48                 , st->name
  49                 , rrdset_type_name(st->chart_type)
  50                 , st->entries * st->update_every
  51                 , rrdset_first_entry_t(st)
  52                 , rrdset_last_entry_t(st)
  53                 , st->update_every
  54                 );
  55
  56         unsigned long memory = st->memsize;
  57
  58         int c = 0;
  59         RRDDIM *rd;
  60         for(rd = st->dimensions; rd ; rd = rd->next) {
  61                 if(rd->flags & RRDDIM_FLAG_HIDDEN) continue;
  62
  63                 memory += rd->memsize;
  64
  65                 buffer_sprintf(wb,
  66                         "%s"
  67                         "\t\t\t\t\"%s\": { \"name\": \"%s\" }"
  68                         , c?",\n":""
  69                         , rd->id
  70                         , rd->name
  71                         );
  72
  73                 c++;
  74         }
  75
  76         buffer_sprintf(wb,
  77                 "\n\t\t\t}\n"
  78                 "\t\t}"
  79                 );
  80
  81         pthread_rwlock_unlock(&st->rwlock);
  82 }
  83
  84 void rrd_stats_api_v1_charts(BUFFER *wb)
  85 {
  86         long c;
  87         RRDSET *st;
  88
  89         buffer_sprintf(wb, "{\n"
  90                    "\t\"hostname\": \"%s\""
  91                 ",\n\t\"update_every\": %d"
  92                 ",\n\t\"history\": %d"
  93                 ",\n\t\"charts\": {"
  94                 , hostname
  95                 , rrd_update_every
  96                 , rrd_default_history_entries
  97                 );
  98
  99         pthread_rwlock_rdlock(&rrdset_root_rwlock);
 100         for(st = rrdset_root, c = 0; st ; st = st->next) {
 101                 if(st->enabled) {
 102                         if(c) buffer_strcat(wb, ",");
 103                         buffer_strcat(wb, "\n\t\t\"");
 104                         buffer_strcat(wb, st->id);
 105                         buffer_strcat(wb, "\": ");
 106                         rrd_stats_api_v1_chart(st, wb);
 107                         c++;
 108                 }
 109         }
 110         pthread_rwlock_unlock(&rrdset_root_rwlock);
 111
 112         buffer_strcat(wb, "\n\t}\n}\n");
 113 }
 114
 115
 116 unsigned long rrd_stats_one_json(RRDSET *st, char *options, BUFFER *wb)
 117 {
 118         time_t now = time(NULL);
 119
 120         pthread_rwlock_rdlock(&st->rwlock);
 121
 122         buffer_sprintf(wb,
 123                 "\t\t{\n"
 124                 "\t\t\t\"id\": \"%s\",\n"
 125                 "\t\t\t\"name\": \"%s\",\n"
 126                 "\t\t\t\"type\": \"%s\",\n"
 127                 "\t\t\t\"family\": \"%s\",\n"
 128                 "\t\t\t\"context\": \"%s\",\n"
 129                 "\t\t\t\"title\": \"%s\",\n"
 130                 "\t\t\t\"priority\": %ld,\n"
 131                 "\t\t\t\"enabled\": %d,\n"
 132                 "\t\t\t\"units\": \"%s\",\n"
 133                 "\t\t\t\"url\": \"/data/%s/%s\",\n"
 134                 "\t\t\t\"chart_type\": \"%s\",\n"
 135                 "\t\t\t\"counter\": %ld,\n"
 136                 "\t\t\t\"entries\": %ld,\n"
 137                 "\t\t\t\"first_entry_t\": %lu,\n"
 138                 "\t\t\t\"last_entry\": %ld,\n"
 139                 "\t\t\t\"last_entry_t\": %lu,\n"
 140                 "\t\t\t\"last_entry_secs_ago\": %lu,\n"
 141                 "\t\t\t\"update_every\": %d,\n"
 142                 "\t\t\t\"isdetail\": %d,\n"
 143                 "\t\t\t\"usec_since_last_update\": %llu,\n"
 144                 "\t\t\t\"collected_total\": " TOTAL_NUMBER_FORMAT ",\n"
 145                 "\t\t\t\"last_collected_total\": " TOTAL_NUMBER_FORMAT ",\n"
 146                 "\t\t\t\"dimensions\": [\n"
 147                 , st->id
 148                 , st->name
 149                 , st->type
 150                 , st->family
 151                 , st->context
 152                 , st->title
 153                 , st->priority
 154                 , st->enabled
 155                 , st->units
 156                 , st->name, options?options:""
 157                 , rrdset_type_name(st->chart_type)
 158                 , st->counter
 159                 , st->entries
 160                 , rrdset_first_entry_t(st)
 161                 , rrdset_last_slot(st)
 162                 , rrdset_last_entry_t(st)
 163                 , (now < rrdset_last_entry_t(st)) ? (time_t)0 : now - rrdset_last_entry_t(st)
 164                 , st->update_every
 165                 , st->isdetail
 166                 , st->usec_since_last_update
 167                 , st->collected_total
 168                 , st->last_collected_total
 169                 );
 170
 171         unsigned long memory = st->memsize;
 172
 173         RRDDIM *rd;
 174         for(rd = st->dimensions; rd ; rd = rd->next) {
 175
 176                 memory += rd->memsize;
 177
 178                 buffer_sprintf(wb,
 179                         "\t\t\t\t{\n"
 180                         "\t\t\t\t\t\"id\": \"%s\",\n"
 181                         "\t\t\t\t\t\"name\": \"%s\",\n"
 182                         "\t\t\t\t\t\"entries\": %ld,\n"
 183                         "\t\t\t\t\t\"isHidden\": %d,\n"
 184                         "\t\t\t\t\t\"algorithm\": \"%s\",\n"
 185                         "\t\t\t\t\t\"multiplier\": %ld,\n"
 186                         "\t\t\t\t\t\"divisor\": %ld,\n"
 187                         "\t\t\t\t\t\"last_entry_t\": %lu,\n"
 188                         "\t\t\t\t\t\"collected_value\": " COLLECTED_NUMBER_FORMAT ",\n"
 189                         "\t\t\t\t\t\"calculated_value\": " CALCULATED_NUMBER_FORMAT ",\n"
 190                         "\t\t\t\t\t\"last_collected_value\": " COLLECTED_NUMBER_FORMAT ",\n"
 191                         "\t\t\t\t\t\"last_calculated_value\": " CALCULATED_NUMBER_FORMAT ",\n"
 192                         "\t\t\t\t\t\"memory\": %lu\n"
 193                         "\t\t\t\t}%s\n"
 194                         , rd->id
 195                         , rd->name
 196                         , rd->entries
 197                         , (rd->flags & RRDDIM_FLAG_HIDDEN)?1:0
 198                         , rrddim_algorithm_name(rd->algorithm)
 199                         , rd->multiplier
 200                         , rd->divisor
 201                         , rd->last_collected_time.tv_sec
 202                         , rd->collected_value
 203                         , rd->calculated_value
 204                         , rd->last_collected_value
 205                         , rd->last_calculated_value
 206                         , rd->memsize
 207                         , rd->next?",":""
 208                         );
 209         }
 210
 211         buffer_sprintf(wb,
 212                 "\t\t\t],\n"
 213                 "\t\t\t\"memory\" : %lu\n"
 214                 "\t\t}"
 215                 , memory
 216                 );
 217
 218         pthread_rwlock_unlock(&st->rwlock);
 219         return memory;
 220 }
 221
 222 #define RRD_GRAPH_JSON_HEADER "{\n\t\"charts\": [\n"
 223 #define RRD_GRAPH_JSON_FOOTER "\n\t]\n}\n"
 224
 225 void rrd_stats_graph_json(RRDSET *st, char *options, BUFFER *wb)
 226 {
 227         buffer_strcat(wb, RRD_GRAPH_JSON_HEADER);
 228         rrd_stats_one_json(st, options, wb);
 229         buffer_strcat(wb, RRD_GRAPH_JSON_FOOTER);
 230 }
 231
 232 void rrd_stats_all_json(BUFFER *wb)
 233 {
 234         unsigned long memory = 0;
 235         long c;
 236         RRDSET *st;
 237
 238         buffer_strcat(wb, RRD_GRAPH_JSON_HEADER);
 239
 240         pthread_rwlock_rdlock(&rrdset_root_rwlock);
 241         for(st = rrdset_root, c = 0; st ; st = st->next) {
 242                 if(st->enabled) {
 243                         if(c) buffer_strcat(wb, ",\n");
 244                         memory += rrd_stats_one_json(st, NULL, wb);
 245                         c++;
 246                 }
 247         }
 248         pthread_rwlock_unlock(&rrdset_root_rwlock);
 249
 250         buffer_sprintf(wb, "\n\t],\n"
 251                 "\t\"hostname\": \"%s\",\n"
 252                 "\t\"update_every\": %d,\n"
 253                 "\t\"history\": %d,\n"
 254                 "\t\"memory\": %lu\n"
 255                 "}\n"
 256                 , hostname
 257                 , rrd_update_every
 258                 , rrd_default_history_entries
 259                 , memory
 260                 );
 261 }
 262
 263
 264
 265 // ----------------------------------------------------------------------------
 266
 267 // RRDR dimension options
 268 #define RRDR_EMPTY      0x01 // the dimension contains / the value is empty (null)
 269 #define RRDR_RESET      0x02 // the dimension contains / the value is reset
 270 #define RRDR_HIDDEN     0x04 // the dimension contains / the value is hidden
 271 #define RRDR_NONZERO    0x08 // the dimension contains / the value is non-zero
 272
 273 // RRDR result options
 274 #define RRDR_RESULT_OPTION_ABSOLUTE 0x00000001
 275 #define RRDR_RESULT_OPTION_RELATIVE 0x00000002
 276
 277 typedef struct rrdresult {
 278         RRDSET *st;                     // the chart this result refers to
 279
 280         uint32_t result_options;        // RRDR_RESULT_OPTION_*
 281
 282         int d;                                  // the number of dimensions
 283         long n;                                 // the number of values in the arrays
 284         long rows;                          // the number of rows used
 285
 286         uint8_t *od;                    // the options for the dimensions
 287
 288         time_t *t;                              // array of n timestamps
 289         calculated_number *v;   // array n x d values
 290         uint8_t *o;                             // array n x d options
 291
 292         long c;                                 // current line ( -1 ~ n ), ( -1 = none, use rrdr_rows() to get number of rows )
 293
 294         long group;                             // how many collected values were grouped for each row
 295         int update_every;               // what is the suggested update frequency in seconds
 296
 297         calculated_number min;
 298         calculated_number max;
 299
 300         time_t before;
 301         time_t after;
 302
 303         int has_st_lock;                // if st is read locked by us
 304 } RRDR;
 305
 306 #define rrdr_rows(r) ((r)->rows)
 307
 308 /*
 309 static void rrdr_dump(RRDR *r)
 310 {
 311         long c, i;
 312         RRDDIM *d;
 313
 314         fprintf(stderr, "\nCHART %s (%s)\n", r->st->id, r->st->name);
 315
 316         for(c = 0, d = r->st->dimensions; d ;c++, d = d->next) {
 317                 fprintf(stderr, "DIMENSION %s (%s), %s%s%s%s\n"
 318                                 , d->id
 319                                 , d->name
 320                                 , (r->od[c] & RRDR_EMPTY)?"EMPTY ":""
 321                                 , (r->od[c] & RRDR_RESET)?"RESET ":""
 322                                 , (r->od[c] & RRDR_HIDDEN)?"HIDDEN ":""
 323                                 , (r->od[c] & RRDR_NONZERO)?"NONZERO ":""
 324                                 );
 325         }
 326
 327         if(r->rows <= 0) {
 328                 fprintf(stderr, "RRDR does not have any values in it.\n");
 329                 return;
 330         }
 331
 332         fprintf(stderr, "RRDR includes %d values in it:\n", r->rows);
 333
 334         // for each line in the array
 335         for(i = 0; i < r->rows ;i++) {
 336                 calculated_number *cn = &r->v[ i * r->d ];
 337                 uint8_t *co = &r->o[ i * r->d ];
 338
 339                 // print the id and the timestamp of the line
 340                 fprintf(stderr, "%ld %ld ", i + 1, r->t[i]);
 341
 342                 // for each dimension
 343                 for(c = 0, d = r->st->dimensions; d ;c++, d = d->next) {
 344                         if(unlikely(r->od[c] & RRDR_HIDDEN)) continue;
 345                         if(unlikely(!(r->od[c] & RRDR_NONZERO))) continue;
 346
 347                         if(co[c] & RRDR_EMPTY)
 348                                 fprintf(stderr, "null ");
 349                         else
 350                                 fprintf(stderr, CALCULATED_NUMBER_FORMAT " %s%s%s%s "
 351                                         , cn[c]
 352                                         , (co[c] & RRDR_EMPTY)?"E":" "
 353                                         , (co[c] & RRDR_RESET)?"R":" "
 354                                         , (co[c] & RRDR_HIDDEN)?"H":" "
 355                                         , (co[c] & RRDR_NONZERO)?"N":" "
 356                                         );
 357                 }
 358
 359                 fprintf(stderr, "\n");
 360         }
 361 }
 362 */
 363
 364 void rrdr_disable_not_selected_dimensions(RRDR *r, const char *dims)
 365 {
 366         char b[strlen(dims) + 1];
 367         char *o = b, *tok;
 368         strcpy(o, dims);
 369
 370         long c;
 371         RRDDIM *d;
 372
 373         // disable all of them
 374         for(c = 0, d = r->st->dimensions; d ;c++, d = d->next)
 375                 r->od[c] |= RRDR_HIDDEN;
 376
 377         while(o && *o && (tok = mystrsep(&o, ",|"))) {
 378                 if(!*tok) continue;
 379
 380                 uint32_t hash = simple_hash(tok);
 381
 382                 // find it and enable it
 383                 for(c = 0, d = r->st->dimensions; d ;c++, d = d->next) {
 384                         if(unlikely((hash == d->hash && !strcmp(d->id, tok)) || !strcmp(d->name, tok))) {
 385                                 r->od[c] &= ~RRDR_HIDDEN;
 386
 387                                 // since the user needs this dimension
 388                                 // make it appear as NONZERO, to return it
 389                                 // even if the dimension has only zeros
 390                                 r->od[c] |= RRDR_NONZERO;
 391                         }
 392                 }
 393         }
 394 }
 395
 396 void rrdr_buffer_print_format(BUFFER *wb, uint32_t format)
 397 {
 398         switch(format) {
 399         case DATASOURCE_JSON:
 400                 buffer_strcat(wb, DATASOURCE_FORMAT_JSON);
 401                 break;
 402
 403         case DATASOURCE_DATATABLE_JSON:
 404                 buffer_strcat(wb, DATASOURCE_FORMAT_DATATABLE_JSON);
 405                 break;
 406
 407         case DATASOURCE_DATATABLE_JSONP:
 408                 buffer_strcat(wb, DATASOURCE_FORMAT_DATATABLE_JSONP);
 409                 break;
 410
 411         case DATASOURCE_JSONP:
 412                 buffer_strcat(wb, DATASOURCE_FORMAT_JSONP);
 413                 break;
 414
 415         case DATASOURCE_SSV:
 416                 buffer_strcat(wb, DATASOURCE_FORMAT_SSV);
 417                 break;
 418
 419         case DATASOURCE_CSV:
 420                 buffer_strcat(wb, DATASOURCE_FORMAT_CSV);
 421                 break;
 422
 423         case DATASOURCE_TSV:
 424                 buffer_strcat(wb, DATASOURCE_FORMAT_TSV);
 425                 break;
 426
 427         case DATASOURCE_HTML:
 428                 buffer_strcat(wb, DATASOURCE_FORMAT_HTML);
 429                 break;
 430
 431         case DATASOURCE_JS_ARRAY:
 432                 buffer_strcat(wb, DATASOURCE_FORMAT_JS_ARRAY);
 433                 break;
 434
 435         case DATASOURCE_SSV_COMMA:
 436                 buffer_strcat(wb, DATASOURCE_FORMAT_SSV_COMMA);
 437                 break;
 438
 439         default:
 440                 buffer_strcat(wb, "unknown");
 441                 break;
 442         }
 443 }
 444
 445 uint32_t rrdr_check_options(RRDR *r, uint32_t options, const char *dims)
 446 {
 447         if(options & RRDR_OPTION_NONZERO) {
 448                 long i;
 449
 450                 if(dims && *dims) {
 451                         // the caller wants specific dimensions
 452                         // disable NONZERO option
 453                         // to make sure we don't accidentally prevent
 454                         // the specific dimensions from being returned
 455                         i = 0;
 456                 }
 457                 else {
 458                         // find how many dimensions are not zero
 459                         long c;
 460                         RRDDIM *rd;
 461                         for(c = 0, i = 0, rd = r->st->dimensions; rd && c < r->d ; c++, rd = rd->next) {
 462                                 if(unlikely(r->od[c] & RRDR_HIDDEN)) continue;
 463                                 if(unlikely(!(r->od[c] & RRDR_NONZERO))) continue;
 464                                 i++;
 465                         }
 466                 }
 467
 468                 // if with nonzero we get i = 0 (no dimensions will be returned)
 469                 // disable nonzero to show all dimensions
 470                 if(!i) options &= ~RRDR_OPTION_NONZERO;
 471         }
 472
 473         return options;
 474 }
 475
 476 void rrdr_json_wrapper_begin(RRDR *r, BUFFER *wb, uint32_t format, uint32_t options, int string_value)
 477 {
 478         long rows = rrdr_rows(r);
 479         long c, i;
 480         RRDDIM *rd;
 481
 482         //info("JSONWRAPPER(): %s: BEGIN", r->st->id);
 483         char kq[2] = "",                                        // key quote
 484                 sq[2] = "";                                             // string quote
 485
 486         if( options & RRDR_OPTION_GOOGLE_JSON ) {
 487                 kq[0] = '\0';
 488                 sq[0] = '\'';
 489         }
 490         else {
 491                 kq[0] = '"';
 492                 sq[0] = '"';
 493         }
 494
 495         buffer_sprintf(wb, "{\n"
 496                         "       %sapi%s: 1,\n"
 497                         "       %sid%s: %s%s%s,\n"
 498                         "       %sname%s: %s%s%s,\n"
 499                         "       %sview_update_every%s: %d,\n"
 500                         "       %supdate_every%s: %d,\n"
 501                         "       %sfirst_entry%s: %u,\n"
 502                         "       %slast_entry%s: %u,\n"
 503                         "       %sbefore%s: %u,\n"
 504                         "       %safter%s: %u,\n"
 505                         "       %sdimension_names%s: ["
 506                         , kq, kq
 507                         , kq, kq, sq, r->st->id, sq
 508                         , kq, kq, sq, r->st->name, sq
 509                         , kq, kq, r->update_every
 510                         , kq, kq, r->st->update_every
 511                         , kq, kq, (uint32_t)rrdset_first_entry_t(r->st)
 512                         , kq, kq, (uint32_t)rrdset_last_entry_t(r->st)
 513                         , kq, kq, (uint32_t)r->before
 514                         , kq, kq, (uint32_t)r->after
 515                         , kq, kq);
 516
 517         for(c = 0, i = 0, rd = r->st->dimensions; rd && c < r->d ;c++, rd = rd->next) {
 518                 if(unlikely(r->od[c] & RRDR_HIDDEN)) continue;
 519                 if(unlikely((options & RRDR_OPTION_NONZERO) && !(r->od[c] & RRDR_NONZERO))) continue;
 520
 521                 if(i) buffer_strcat(wb, ", ");
 522                 buffer_strcat(wb, sq);
 523                 buffer_strcat(wb, rd->name);
 524                 buffer_strcat(wb, sq);
 525                 i++;
 526         }
 527         if(!i) {
 528 #ifdef NETDATA_INTERNAL_CHECKS
 529                 error("RRDR is empty for %s (RRDR has %d dimensions, options is 0x%08x)", r->st->id, r->d, options);
 530 #endif
 531                 rows = 0;
 532                 buffer_strcat(wb, sq);
 533                 buffer_strcat(wb, "no data");
 534                 buffer_strcat(wb, sq);
 535         }
 536
 537         buffer_sprintf(wb, "],\n"
 538                         "       %sdimension_ids%s: ["
 539                         , kq, kq);
 540
 541         for(c = 0, i = 0, rd = r->st->dimensions; rd && c < r->d ;c++, rd = rd->next) {
 542                 if(unlikely(r->od[c] & RRDR_HIDDEN)) continue;
 543                 if(unlikely((options & RRDR_OPTION_NONZERO) && !(r->od[c] & RRDR_NONZERO))) continue;
 544
 545                 if(i) buffer_strcat(wb, ", ");
 546                 buffer_strcat(wb, sq);
 547                 buffer_strcat(wb, rd->id);
 548                 buffer_strcat(wb, sq);
 549                 i++;
 550         }
 551         if(!i) {
 552                 rows = 0;
 553                 buffer_strcat(wb, sq);
 554                 buffer_strcat(wb, "no data");
 555                 buffer_strcat(wb, sq);
 556         }
 557
 558         buffer_sprintf(wb, "],\n"
 559                         "       %slatest_values%s: ["
 560                         , kq, kq);
 561
 562         for(c = 0, i = 0, rd = r->st->dimensions; rd && c < r->d ;c++, rd = rd->next) {
 563                 if(unlikely(r->od[c] & RRDR_HIDDEN)) continue;
 564                 if(unlikely((options & RRDR_OPTION_NONZERO) && !(r->od[c] & RRDR_NONZERO))) continue;
 565
 566                 if(i) buffer_strcat(wb, ", ");
 567                 i++;
 568
 569                 storage_number n = rd->values[rrdset_last_slot(r->st)];
 570
 571                 if(!does_storage_number_exist(n))
 572                         buffer_strcat(wb, "null");
 573                 else
 574                         buffer_rrd_value(wb, unpack_storage_number(n));
 575         }
 576         if(!i) {
 577                 rows = 0;
 578                 buffer_strcat(wb, "null");
 579         }
 580
 581         buffer_sprintf(wb, "],\n"
 582                         "       %sview_latest_values%s: ["
 583                         , kq, kq);
 584
 585         i = 0;
 586         if(rows) {
 587                 for(c = 0, i = 0, rd = r->st->dimensions; rd && c < r->d ;c++, rd = rd->next) {
 588                         if(unlikely(r->od[c] & RRDR_HIDDEN)) continue;
 589                         if(unlikely((options & RRDR_OPTION_NONZERO) && !(r->od[c] & RRDR_NONZERO))) continue;
 590
 591                         if(i) buffer_strcat(wb, ", ");
 592                         i++;
 593
 594                         calculated_number *cn = &r->v[ (0) * r->d ];
 595                         uint8_t *co = &r->o[ (0) * r->d ];
 596
 597                         if(co[c] & RRDR_EMPTY)
 598                                 buffer_strcat(wb, "null");
 599                         else
 600                                 buffer_rrd_value(wb, cn[c]);
 601                 }
 602         }
 603         if(!i) {
 604                 rows = 0;
 605                 buffer_strcat(wb, "null");
 606         }
 607
 608         buffer_sprintf(wb, "],\n"
 609                         "       %sdimensions%s: %ld,\n"
 610                         "       %spoints%s: %ld,\n"
 611                         "       %sformat%s: %s"
 612                         , kq, kq, i
 613                         , kq, kq, rows
 614                         , kq, kq, sq
 615                         );
 616
 617         rrdr_buffer_print_format(wb, format);
 618
 619         buffer_sprintf(wb, "%s,\n"
 620                         "       %sresult%s: "
 621                         , sq
 622                         , kq, kq
 623                         );
 624
 625         if(string_value) buffer_strcat(wb, sq);
 626         //info("JSONWRAPPER(): %s: END", r->st->id);
 627 }
 628
 629 void rrdr_json_wrapper_end(RRDR *r, BUFFER *wb, uint32_t format, uint32_t options, int string_value)
 630 {
 631         (void)format;
 632
 633         char kq[2] = "",                                        // key quote
 634                 sq[2] = "";                                             // string quote
 635
 636         if( options & RRDR_OPTION_GOOGLE_JSON ) {
 637                 kq[0] = '\0';
 638                 sq[0] = '\'';
 639         }
 640         else {
 641                 kq[0] = '"';
 642                 sq[0] = '"';
 643         }
 644
 645         if(string_value) buffer_strcat(wb, sq);
 646
 647         buffer_sprintf(wb, ",\n %smin%s: ", kq, kq);
 648         buffer_rrd_value(wb, r->min);
 649         buffer_sprintf(wb, ",\n %smax%s: ", kq, kq);
 650         buffer_rrd_value(wb, r->max);
 651         buffer_strcat(wb, "\n}\n");
 652 }
 653
 654 #define JSON_DATES_JS 1
 655 #define JSON_DATES_TIMESTAMP 2
 656
 657 static void rrdr2json(RRDR *r, BUFFER *wb, uint32_t options, int datatable)
 658 {
 659         //info("RRD2JSON(): %s: BEGIN", r->st->id);
 660         int row_annotations = 0, dates, dates_with_new = 0;
 661         char kq[2] = "",                                        // key quote
 662                 sq[2] = "",                                             // string quote
 663                 pre_label[101] = "",                    // before each label
 664                 post_label[101] = "",                   // after each label
 665                 pre_date[101] = "",                             // the beginning of line, to the date
 666                 post_date[101] = "",                    // closing the date
 667                 pre_value[101] = "",                    // before each value
 668                 post_value[101] = "",                   // after each value
 669                 post_line[101] = "",                    // at the end of each row
 670                 normal_annotation[201] = "",    // default row annotation
 671                 overflow_annotation[201] = "",  // overflow row annotation
 672                 data_begin[101] = "",                   // between labels and values
 673                 finish[101] = "";                               // at the end of everything
 674
 675         if(datatable) {
 676                 dates = JSON_DATES_JS;
 677                 if( options & RRDR_OPTION_GOOGLE_JSON ) {
 678                         kq[0] = '\0';
 679                         sq[0] = '\'';
 680                 }
 681                 else {
 682                         kq[0] = '"';
 683                         sq[0] = '"';
 684                 }
 685                 row_annotations = 1;
 686                 snprintfz(pre_date,   100, "            {%sc%s:[{%sv%s:%s", kq, kq, kq, kq, sq);
 687                 snprintfz(post_date,  100, "%s}", sq);
 688                 snprintfz(pre_label,  100, ",\n         {%sid%s:%s%s,%slabel%s:%s", kq, kq, sq, sq, kq, kq, sq);
 689                 snprintfz(post_label, 100, "%s,%spattern%s:%s%s,%stype%s:%snumber%s}", sq, kq, kq, sq, sq, kq, kq, sq, sq);
 690                 snprintfz(pre_value,  100, ",{%sv%s:", kq, kq);
 691                 strcpy(post_value,         "}");
 692                 strcpy(post_line,          "]}");
 693                 snprintfz(data_begin, 100, "\n  ],\n    %srows%s:\n     [\n", kq, kq);
 694                 strcpy(finish,             "\n  ]\n}");
 695
 696                 snprintfz(overflow_annotation, 200, ",{%sv%s:%sRESET OR OVERFLOW%s},{%sv%s:%sThe counters have been wrapped.%s}", kq, kq, sq, sq, kq, kq, sq, sq);
 697                 snprintfz(normal_annotation,   200, ",{%sv%s:null},{%sv%s:null}", kq, kq, kq, kq);
 698
 699                 buffer_sprintf(wb, "{\n %scols%s:\n     [\n", kq, kq);
 700                 buffer_sprintf(wb, "            {%sid%s:%s%s,%slabel%s:%stime%s,%spattern%s:%s%s,%stype%s:%sdatetime%s},\n", kq, kq, sq, sq, kq, kq, sq, sq, kq, kq, sq, sq, kq, kq, sq, sq);
 701                 buffer_sprintf(wb, "            {%sid%s:%s%s,%slabel%s:%s%s,%spattern%s:%s%s,%stype%s:%sstring%s,%sp%s:{%srole%s:%sannotation%s}},\n", kq, kq, sq, sq, kq, kq, sq, sq, kq, kq, sq, sq, kq, kq, sq, sq, kq, kq, kq, kq, sq, sq);
 702                 buffer_sprintf(wb, "            {%sid%s:%s%s,%slabel%s:%s%s,%spattern%s:%s%s,%stype%s:%sstring%s,%sp%s:{%srole%s:%sannotationText%s}}", kq, kq, sq, sq, kq, kq, sq, sq, kq, kq, sq, sq, kq, kq, sq, sq, kq, kq, kq, kq, sq, sq);
 703
 704                 // remove the valueobjects flag
 705                 // google wants its own keys
 706                 if(options & RRDR_OPTION_OBJECTSROWS)
 707                         options &= ~RRDR_OPTION_OBJECTSROWS;
 708         }
 709         else {
 710                 kq[0] = '"';
 711                 sq[0] = '"';
 712                 if((options & RRDR_OPTION_SECONDS) || (options & RRDR_OPTION_MILLISECONDS)) {
 713                         dates = JSON_DATES_TIMESTAMP;
 714                         dates_with_new = 0;
 715                 }
 716                 else {
 717                         dates = JSON_DATES_JS;
 718                         dates_with_new = 1;
 719                 }
 720                 if( options & RRDR_OPTION_OBJECTSROWS )
 721                         strcpy(pre_date, "              { ");
 722                 else
 723                         strcpy(pre_date, "              [ ");
 724                 strcpy(pre_label,  ", \"");
 725                 strcpy(post_label, "\"");
 726                 strcpy(pre_value,  ", ");
 727                 if( options & RRDR_OPTION_OBJECTSROWS )
 728                         strcpy(post_line, "}");
 729                 else
 730                         strcpy(post_line, "]");
 731                 snprintfz(data_begin, 100, "],\n        %sdata%s:\n     [\n", kq, kq);
 732                 strcpy(finish,             "\n  ]\n}");
 733
 734                 buffer_sprintf(wb, "{\n %slabels%s: [", kq, kq);
 735                 buffer_sprintf(wb, "%stime%s", sq, sq);
 736         }
 737
 738         // -------------------------------------------------------------------------
 739         // print the JSON header
 740
 741         long c, i;
 742         RRDDIM *rd;
 743
 744         // print the header lines
 745         for(c = 0, i = 0, rd = r->st->dimensions; rd && c < r->d ;c++, rd = rd->next) {
 746                 if(unlikely(r->od[c] & RRDR_HIDDEN)) continue;
 747                 if(unlikely((options & RRDR_OPTION_NONZERO) && !(r->od[c] & RRDR_NONZERO))) continue;
 748
 749                 buffer_strcat(wb, pre_label);
 750                 buffer_strcat(wb, rd->name);
 751                 buffer_strcat(wb, post_label);
 752                 i++;
 753         }
 754         if(!i) {
 755                 buffer_strcat(wb, pre_label);
 756                 buffer_strcat(wb, "no data");
 757                 buffer_strcat(wb, post_label);
 758         }
 759
 760         // print the begin of row data
 761         buffer_strcat(wb, data_begin);
 762
 763         // if all dimensions are hidden, print a null
 764         if(!i) {
 765                 buffer_strcat(wb, finish);
 766                 return;
 767         }
 768
 769         long start = 0, end = rrdr_rows(r), step = 1;
 770         if((options & RRDR_OPTION_REVERSED)) {
 771                 start = rrdr_rows(r) - 1;
 772                 end = -1;
 773                 step = -1;
 774         }
 775
 776         // for each line in the array
 777         calculated_number total = 1;
 778         for(i = start; i != end ;i += step) {
 779                 calculated_number *cn = &r->v[ i * r->d ];
 780                 uint8_t *co = &r->o[ i * r->d ];
 781
 782                 time_t now = r->t[i];
 783
 784                 if(dates == JSON_DATES_JS) {
 785                         // generate the local date time
 786                         struct tm tmbuf, *tm = localtime_r(&now, &tmbuf);
 787                         if(!tm) { error("localtime_r() failed."); continue; }
 788
 789                         if(likely(i != start)) buffer_strcat(wb, ",\n");
 790                         buffer_strcat(wb, pre_date);
 791
 792                         if( options & RRDR_OPTION_OBJECTSROWS )
 793                                 buffer_sprintf(wb, "%stime%s: ", kq, kq);
 794
 795                         if(dates_with_new)
 796                                 buffer_strcat(wb, "new ");
 797
 798                         buffer_jsdate(wb, tm->tm_year + 1900, tm->tm_mon, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec);
 799
 800                         buffer_strcat(wb, post_date);
 801
 802                         if(row_annotations) {
 803                                 // google supports one annotation per row
 804                                 int annotation_found = 0;
 805                                 for(c = 0, rd = r->st->dimensions; rd ;c++, rd = rd->next) {
 806                                         if(co[c] & RRDR_RESET) {
 807                                                 buffer_strcat(wb, overflow_annotation);
 808                                                 annotation_found = 1;
 809                                                 break;
 810                                         }
 811                                 }
 812                                 if(!annotation_found)
 813                                         buffer_strcat(wb, normal_annotation);
 814                         }
 815                 }
 816                 else {
 817                         // print the timestamp of the line
 818                         if(likely(i != start)) buffer_strcat(wb, ",\n");
 819                         buffer_strcat(wb, pre_date);
 820
 821                         if( options & RRDR_OPTION_OBJECTSROWS )
 822                                 buffer_sprintf(wb, "%stime%s: ", kq, kq);
 823
 824                         buffer_rrd_value(wb, (calculated_number)r->t[i]);
 825                         // in ms
 826                         if(options & RRDR_OPTION_MILLISECONDS) buffer_strcat(wb, "000");
 827
 828                         buffer_strcat(wb, post_date);
 829                 }
 830
 831                 if(unlikely(options & RRDR_OPTION_PERCENTAGE)) {
 832                         total = 0;
 833                         for(c = 0, rd = r->st->dimensions; rd && c < r->d ;c++, rd = rd->next) {
 834                                 calculated_number n = cn[c];
 835
 836                                 if(likely((options & RRDR_OPTION_ABSOLUTE) && n < 0))
 837                                         n = -n;
 838
 839                                 total += n;
 840                         }
 841                         // prevent a division by zero
 842                         if(total == 0) total = 1;
 843                 }
 844
 845                 // for each dimension
 846                 for(c = 0, rd = r->st->dimensions; rd && c < r->d ;c++, rd = rd->next) {
 847                         if(unlikely(r->od[c] & RRDR_HIDDEN)) continue;
 848                         if(unlikely((options & RRDR_OPTION_NONZERO) && !(r->od[c] & RRDR_NONZERO))) continue;
 849
 850                         calculated_number n = cn[c];
 851
 852                         buffer_strcat(wb, pre_value);
 853
 854                         if( options & RRDR_OPTION_OBJECTSROWS )
 855                                 buffer_sprintf(wb, "%s%s%s: ", kq, rd->name, kq);
 856
 857                         if(co[c] & RRDR_EMPTY) {
 858                                 if(options & RRDR_OPTION_NULL2ZERO)
 859                                         buffer_strcat(wb, "0");
 860                                 else
 861                                         buffer_strcat(wb, "null");
 862                         }
 863                         else {
 864                                 if(unlikely((options & RRDR_OPTION_ABSOLUTE) && n < 0))
 865                                         n = -n;
 866
 867                                 if(unlikely(options & RRDR_OPTION_PERCENTAGE))
 868                                         n = n * 100 / total;
 869
 870                                 buffer_rrd_value(wb, n);
 871                         }
 872
 873                         buffer_strcat(wb, post_value);
 874                 }
 875
 876                 buffer_strcat(wb, post_line);
 877         }
 878
 879         buffer_strcat(wb, finish);
 880         //info("RRD2JSON(): %s: END", r->st->id);
 881 }
 882
 883 static void rrdr2csv(RRDR *r, BUFFER *wb, uint32_t options, const char *startline, const char *separator, const char *endline, const char *betweenlines)
 884 {
 885         //info("RRD2CSV(): %s: BEGIN", r->st->id);
 886         long c, i;
 887         RRDDIM *d;
 888
 889         // print the csv header
 890         for(c = 0, i = 0, d = r->st->dimensions; d && c < r->d ;c++, d = d->next) {
 891                 if(unlikely(r->od[c] & RRDR_HIDDEN)) continue;
 892                 if(unlikely((options & RRDR_OPTION_NONZERO) && !(r->od[c] & RRDR_NONZERO))) continue;
 893
 894                 if(!i) {
 895                         buffer_strcat(wb, startline);
 896                         if(options & RRDR_OPTION_LABEL_QUOTES) buffer_strcat(wb, "\"");
 897                         buffer_strcat(wb, "time");
 898                         if(options & RRDR_OPTION_LABEL_QUOTES) buffer_strcat(wb, "\"");
 899                 }
 900                 buffer_strcat(wb, separator);
 901                 if(options & RRDR_OPTION_LABEL_QUOTES) buffer_strcat(wb, "\"");
 902                 buffer_strcat(wb, d->name);
 903                 if(options & RRDR_OPTION_LABEL_QUOTES) buffer_strcat(wb, "\"");
 904                 i++;
 905         }
 906         buffer_strcat(wb, endline);
 907
 908         if(!i) {
 909                 // no dimensions present
 910                 return;
 911         }
 912
 913         long start = 0, end = rrdr_rows(r), step = 1;
 914         if((options & RRDR_OPTION_REVERSED)) {
 915                 start = rrdr_rows(r) - 1;
 916                 end = -1;
 917                 step = -1;
 918         }
 919
 920         // for each line in the array
 921         calculated_number total = 1;
 922         for(i = start; i != end ;i += step) {
 923                 calculated_number *cn = &r->v[ i * r->d ];
 924                 uint8_t *co = &r->o[ i * r->d ];
 925
 926                 buffer_strcat(wb, betweenlines);
 927                 buffer_strcat(wb, startline);
 928
 929                 time_t now = r->t[i];
 930
 931                 if((options & RRDR_OPTION_SECONDS) || (options & RRDR_OPTION_MILLISECONDS)) {
 932                         // print the timestamp of the line
 933                         buffer_rrd_value(wb, (calculated_number)now);
 934                         // in ms
 935                         if(options & RRDR_OPTION_MILLISECONDS) buffer_strcat(wb, "000");
 936                 }
 937                 else {
 938                         // generate the local date time
 939                         struct tm tmbuf, *tm = localtime_r(&now, &tmbuf);
 940                         if(!tm) { error("localtime() failed."); continue; }
 941                         buffer_date(wb, tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec);
 942                 }
 943
 944                 if(unlikely(options & RRDR_OPTION_PERCENTAGE)) {
 945                         total = 0;
 946                         for(c = 0, d = r->st->dimensions; d && c < r->d ;c++, d = d->next) {
 947                                 calculated_number n = cn[c];
 948
 949                                 if(likely((options & RRDR_OPTION_ABSOLUTE) && n < 0))
 950                                         n = -n;
 951
 952                                 total += n;
 953                         }
 954                         // prevent a division by zero
 955                         if(total == 0) total = 1;
 956                 }
 957
 958                 // for each dimension
 959                 for(c = 0, d = r->st->dimensions; d && c < r->d ;c++, d = d->next) {
 960                         if(unlikely(r->od[c] & RRDR_HIDDEN)) continue;
 961                         if(unlikely((options & RRDR_OPTION_NONZERO) && !(r->od[c] & RRDR_NONZERO))) continue;
 962
 963                         buffer_strcat(wb, separator);
 964
 965                         calculated_number n = cn[c];
 966
 967                         if(co[c] & RRDR_EMPTY) {
 968                                 if(options & RRDR_OPTION_NULL2ZERO)
 969                                         buffer_strcat(wb, "0");
 970                                 else
 971                                         buffer_strcat(wb, "null");
 972                         }
 973                         else {
 974                                 if(unlikely((options & RRDR_OPTION_ABSOLUTE) && n < 0))
 975                                         n = -n;
 976
 977                                 if(unlikely(options & RRDR_OPTION_PERCENTAGE))
 978                                         n = n * 100 / total;
 979
 980                                 buffer_rrd_value(wb, n);
 981                         }
 982                 }
 983
 984                 buffer_strcat(wb, endline);
 985         }
 986         //info("RRD2CSV(): %s: END", r->st->id);
 987 }
 988
 989 inline static calculated_number rrdr2value(RRDR *r, long i, uint32_t options, int *all_values_are_null) {
 990         long c;
 991         RRDDIM *d;
 992
 993         calculated_number *cn = &r->v[ i * r->d ];
 994         uint8_t *co = &r->o[ i * r->d ];
 995
 996         calculated_number sum = 0, min = 0, max = 0, v;
 997         int all_null = 1, init = 1;
 998
 999         calculated_number total = 1;
1000         if(unlikely(options & RRDR_OPTION_PERCENTAGE)) {
1001                 total = 0;
1002                 for(c = 0, d = r->st->dimensions; d && c < r->d ;c++, d = d->next) {
1003                         calculated_number n = cn[c];
1004
1005                         if(likely((options & RRDR_OPTION_ABSOLUTE) && n < 0))
1006                                 n = -n;
1007
1008                         total += n;
1009                 }
1010                 // prevent a division by zero
1011                 if(total == 0) total = 1;
1012         }
1013
1014         // for each dimension
1015         for(c = 0, d = r->st->dimensions; d && c < r->d ;c++, d = d->next) {
1016                 if(unlikely(r->od[c] & RRDR_HIDDEN)) continue;
1017                 if(unlikely((options & RRDR_OPTION_NONZERO) && !(r->od[c] & RRDR_NONZERO))) continue;
1018
1019                 calculated_number n = cn[c];
1020
1021                 if(likely((options & RRDR_OPTION_ABSOLUTE) && n < 0))
1022                         n = -n;
1023
1024                 if(unlikely(options & RRDR_OPTION_PERCENTAGE))
1025                         n = n * 100 / total;
1026
1027                 if(unlikely(init)) {
1028                         if(n > 0) {
1029                                 min = 0;
1030                                 max = n;
1031                         }
1032                         else {
1033                                 min = n;
1034                                 max = 0;
1035                         }
1036                         init = 0;
1037                 }
1038
1039                 if(likely(!(co[c] & RRDR_EMPTY))) {
1040                         all_null = 0;
1041                         sum += n;
1042                 }
1043
1044                 if(n < min) min = n;
1045                 if(n > max) max = n;
1046         }
1047
1048         if(unlikely(all_null)) {
1049                 if(likely(*all_values_are_null))
1050                         *all_values_are_null = 1;
1051                 return 0;
1052         }
1053         else {
1054                 if(likely(*all_values_are_null))
1055                         *all_values_are_null = 0;
1056         }
1057
1058         if(options & RRDR_OPTION_MIN2MAX)
1059                 v = max - min;
1060         else
1061                 v = sum;
1062
1063         return v;
1064 }
1065
1066 static void rrdr2ssv(RRDR *r, BUFFER *wb, uint32_t options, const char *prefix, const char *separator, const char *suffix)
1067 {
1068         //info("RRD2SSV(): %s: BEGIN", r->st->id);
1069         long i;
1070
1071         buffer_strcat(wb, prefix);
1072         long start = 0, end = rrdr_rows(r), step = 1;
1073         if((options & RRDR_OPTION_REVERSED)) {
1074                 start = rrdr_rows(r) - 1;
1075                 end = -1;
1076                 step = -1;
1077         }
1078
1079         // for each line in the array
1080         for(i = start; i != end ;i += step) {
1081                 int all_values_are_null = 0;
1082                 calculated_number v = rrdr2value(r, i, options, &all_values_are_null);
1083
1084                 if(likely(i != start)) {
1085                         if(r->min > v) r->min = v;
1086                         if(r->max < v) r->max = v;
1087                 }
1088                 else {
1089                         r->min = v;
1090                         r->max = v;
1091                 }
1092
1093                 if(likely(i != start))
1094                         buffer_strcat(wb, separator);
1095
1096                 if(all_values_are_null) {
1097                         if(options & RRDR_OPTION_NULL2ZERO)
1098                                 buffer_strcat(wb, "0");
1099                         else
1100                                 buffer_strcat(wb, "null");
1101                 }
1102                 else
1103                         buffer_rrd_value(wb, v);
1104         }
1105         buffer_strcat(wb, suffix);
1106         //info("RRD2SSV(): %s: END", r->st->id);
1107 }
1108
1109 inline static calculated_number *rrdr_line_values(RRDR *r)
1110 {
1111         return &r->v[ r->c * r->d ];
1112 }
1113
1114 inline static uint8_t *rrdr_line_options(RRDR *r)
1115 {
1116         return &r->o[ r->c * r->d ];
1117 }
1118
1119 inline static int rrdr_line_init(RRDR *r, time_t t)
1120 {
1121         r->c++;
1122
1123         if(unlikely(r->c >= r->n)) {
1124                 error("requested to step above RRDR size for chart %s", r->st->name);
1125                 r->c = r->n - 1;
1126         }
1127
1128         // save the time
1129         r->t[r->c] = t;
1130
1131         return 1;
1132 }
1133
1134 inline static void rrdr_lock_rrdset(RRDR *r) {
1135         if(unlikely(!r)) {
1136                 error("NULL value given!");
1137                 return;
1138         }
1139
1140         pthread_rwlock_rdlock(&r->st->rwlock);
1141         r->has_st_lock = 1;
1142 }
1143
1144 inline static void rrdr_unlock_rrdset(RRDR *r) {
1145         if(unlikely(!r)) {
1146                 error("NULL value given!");
1147                 return;
1148         }
1149
1150         if(likely(r->has_st_lock)) {
1151                 pthread_rwlock_unlock(&r->st->rwlock);
1152                 r->has_st_lock = 0;
1153         }
1154 }
1155
1156 inline static void rrdr_free(RRDR *r)
1157 {
1158         if(unlikely(!r)) {
1159                 error("NULL value given!");
1160                 return;
1161         }
1162
1163         rrdr_unlock_rrdset(r);
1164         if(likely(r->t)) free(r->t);
1165         if(likely(r->v)) free(r->v);
1166         if(likely(r->o)) free(r->o);
1167         if(likely(r->od)) free(r->od);
1168         free(r);
1169 }
1170
1171 inline void rrdr_done(RRDR *r)
1172 {
1173         r->rows = r->c + 1;
1174         r->c = 0;
1175 }
1176
1177 static RRDR *rrdr_create(RRDSET *st, long n)
1178 {
1179         if(unlikely(!st)) {
1180                 error("NULL value given!");
1181                 return NULL;
1182         }
1183
1184         RRDR *r = calloc(1, sizeof(RRDR));
1185         if(unlikely(!r)) goto cleanup;
1186
1187         r->st = st;
1188
1189         rrdr_lock_rrdset(r);
1190
1191         RRDDIM *rd;
1192         for(rd = st->dimensions ; rd ; rd = rd->next) r->d++;
1193
1194         r->n = n;
1195
1196         r->t = malloc(n * sizeof(time_t));
1197         if(unlikely(!r->t)) goto cleanup;
1198
1199         r->v = malloc(n * r->d * sizeof(calculated_number));
1200         if(unlikely(!r->v)) goto cleanup;
1201
1202         r->o = malloc(n * r->d * sizeof(uint8_t));
1203         if(unlikely(!r->o)) goto cleanup;
1204
1205         r->od = malloc(r->d * sizeof(uint8_t));
1206         if(unlikely(!r->od)) goto cleanup;
1207
1208         // set the hidden flag on hidden dimensions
1209         int c;
1210         for(c = 0, rd = st->dimensions ; rd ; c++, rd = rd->next) {
1211                 if(unlikely(rd->flags & RRDDIM_FLAG_HIDDEN)) r->od[c] = RRDR_HIDDEN;
1212                 else r->od[c] = 0;
1213         }
1214
1215         r->c = -1;
1216
1217         r->group = 1;
1218         r->update_every = 1;
1219
1220         return r;
1221
1222 cleanup:
1223         error("Cannot allocate RRDR memory for %ld entries", n);
1224         if(likely(r)) rrdr_free(r);
1225         return NULL;
1226 }
1227
1228 RRDR *rrd2rrdr(RRDSET *st, long points, long long after, long long before, int group_method, int aligned)
1229 {
1230         int debug = st->debug;
1231         int absolute_period_requested = -1;
1232
1233         time_t first_entry_t = rrdset_first_entry_t(st);
1234         time_t last_entry_t  = rrdset_last_entry_t(st);
1235
1236         if(before == 0 && after == 0) {
1237                 before = last_entry_t;
1238                 after = first_entry_t;
1239                 absolute_period_requested = 0;
1240         }
1241
1242         // allow relative for before and after
1243         if(((before < 0)?-before:before) <= (st->update_every * st->entries)) {
1244                 before = last_entry_t + before;
1245                 absolute_period_requested = 0;
1246         }
1247
1248         if(((after < 0)?-after:after) <= (st->update_every * st->entries)) {
1249                 if(after == 0) after = -st->update_every;
1250                 after = before + after;
1251                 absolute_period_requested = 0;
1252         }
1253
1254         if(absolute_period_requested == -1)
1255                 absolute_period_requested = 1;
1256
1257         // make sure they are within our timeframe
1258         if(before > last_entry_t)  before = last_entry_t;
1259         if(before < first_entry_t) before = first_entry_t;
1260
1261         if(after > last_entry_t)  after = last_entry_t;
1262         if(after < first_entry_t) after = first_entry_t;
1263
1264         // check if they are upside down
1265         if(after > before) {
1266                 time_t tmp = before;
1267                 before = after;
1268                 after = tmp;
1269         }
1270
1271         // the duration of the chart
1272         time_t duration = before - after;
1273         long available_points = duration / st->update_every;
1274
1275         if(duration <= 0 || available_points <= 0)
1276                 return rrdr_create(st, 1);
1277
1278         // check the wanted points
1279         if(points < 0) points = -points;
1280         if(points > available_points) points = available_points;
1281         if(points == 0) points = available_points;
1282
1283         // calculate proper grouping of source data
1284         long group = available_points / points;
1285         if(group <= 0) group = 1;
1286
1287         // round group to the closest integer
1288         if(available_points % points > points / 2) group++;
1289
1290         time_t after_new  = (aligned) ? (after  - (after  % (group * st->update_every))) : after;
1291         time_t before_new = (aligned) ? (before - (before % (group * st->update_every))) : before;
1292         long points_new   = (before_new - after_new) / st->update_every / group;
1293
1294         // find the starting and ending slots in our round robin db
1295         long    start_at_slot = rrdset_time2slot(st, before_new),
1296                         stop_at_slot  = rrdset_time2slot(st, after_new);
1297
1298 #ifdef NETDATA_INTERNAL_CHECKS
1299         if(after_new < first_entry_t) {
1300                 error("after_new %u is too small, minimum %u", (uint32_t)after_new, (uint32_t)first_entry_t);
1301         }
1302         if(after_new > last_entry_t) {
1303                 error("after_new %u is too big, maximum %u", (uint32_t)after_new, (uint32_t)last_entry_t);
1304         }
1305         if(before_new < first_entry_t) {
1306                 error("before_new %u is too small, minimum %u", (uint32_t)before_new, (uint32_t)first_entry_t);
1307         }
1308         if(before_new > last_entry_t) {
1309                 error("before_new %u is too big, maximum %u", (uint32_t)before_new, (uint32_t)last_entry_t);
1310         }
1311         if(start_at_slot < 0 || start_at_slot >= st->entries) {
1312                 error("start_at_slot is invalid %ld, expected 0 to %ld", start_at_slot, st->entries - 1);
1313         }
1314         if(stop_at_slot < 0 || stop_at_slot >= st->entries) {
1315                 error("stop_at_slot is invalid %ld, expected 0 to %ld", stop_at_slot, st->entries - 1);
1316         }
1317         if(points_new > (before_new - after_new) / group / st->update_every + 1) {
1318                 error("points_new %ld is more than points %ld", points_new, (before_new - after_new) / group / st->update_every + 1);
1319         }
1320 #endif
1321
1322         //info("RRD2RRDR(): %s: wanted %ld points, got %ld - group=%ld, wanted duration=%u, got %u - wanted %ld - %ld, got %ld - %ld", st->id, points, points_new, group, before - after, before_new - after_new, after, before, after_new, before_new);
1323
1324         after = after_new;
1325         before = before_new;
1326         duration = before - after;
1327         points = points_new;
1328
1329         // Now we have:
1330         // before = the end time of the calculation
1331         // after = the start time of the calculation
1332         // duration = the duration of the calculation
1333         // group = the number of source points to aggregate / group together
1334         // method = the method of grouping source points
1335         // points = the number of points to generate
1336
1337
1338         // -------------------------------------------------------------------------
1339         // initialize our result set
1340
1341         RRDR *r = rrdr_create(st, points);
1342         if(!r) {
1343 #ifdef NETDATA_INTERNAL_CHECKS
1344                 error("Cannot create RRDR for %s, after=%u, before=%u, duration=%u, points=%ld", st->id, (uint32_t)after, (uint32_t)before, (uint32_t)duration, points);
1345 #endif
1346                 return NULL;
1347         }
1348         if(!r->d) {
1349 #ifdef NETDATA_INTERNAL_CHECKS
1350                 error("Returning empty RRDR (no dimensions in RRDSET) for %s, after=%u, before=%u, duration=%u, points=%ld", st->id, (uint32_t)after, (uint32_t)before, (uint32_t)duration, points);
1351 #endif
1352                 return r;
1353         }
1354
1355         if(absolute_period_requested == 1)
1356                 r->result_options |= RRDR_RESULT_OPTION_ABSOLUTE;
1357         else
1358                 r->result_options |= RRDR_RESULT_OPTION_RELATIVE;
1359
1360         // find how many dimensions we have
1361         long dimensions = r->d;
1362
1363
1364         // -------------------------------------------------------------------------
1365         // checks for debugging
1366
1367         if(debug) debug(D_RRD_STATS, "INFO %s first_t: %u, last_t: %u, all_duration: %u, after: %u, before: %u, duration: %u, points: %ld, group: %ld"
1368                         , st->id
1369                         , (uint32_t)first_entry_t
1370                         , (uint32_t)last_entry_t
1371                         , (uint32_t)(last_entry_t - first_entry_t)
1372                         , (uint32_t)after
1373                         , (uint32_t)before
1374                         , (uint32_t)duration
1375                         , points
1376                         , group
1377                         );
1378
1379
1380         // -------------------------------------------------------------------------
1381         // temp arrays for keeping values per dimension
1382
1383         calculated_number       last_values[dimensions]; // keep the last value of each dimension
1384         calculated_number       group_values[dimensions]; // keep sums when grouping
1385         long                            group_counts[dimensions]; // keep the number of values added to group_values
1386         uint8_t                         group_options[dimensions];
1387         uint8_t                         found_non_zero[dimensions];
1388
1389
1390         // initialize them
1391         RRDDIM *rd;
1392         long c;
1393         for( rd = st->dimensions, c = 0 ; rd && c < dimensions ; rd = rd->next, c++) {
1394                 last_values[c] = 0;
1395                 group_values[c] = 0;
1396                 group_counts[c] = 0;
1397                 group_options[c] = 0;
1398                 found_non_zero[c] = 0;
1399         }
1400
1401
1402         // -------------------------------------------------------------------------
1403         // the main loop
1404
1405         time_t  now = rrdset_slot2time(st, start_at_slot),
1406                         dt = st->update_every,
1407                         group_start_t = 0;
1408
1409         if(unlikely(debug)) debug(D_RRD_STATS, "BEGIN %s after_t: %u (stop_at_t: %ld), before_t: %u (start_at_t: %ld), start_t(now): %u, current_entry: %ld, entries: %ld"
1410                         , st->id
1411                         , (uint32_t)after
1412                         , stop_at_slot
1413                         , (uint32_t)before
1414                         , start_at_slot
1415                         , (uint32_t)now
1416                         , st->current_entry
1417                         , st->entries
1418                         );
1419
1420         r->group = group;
1421         r->update_every = group * st->update_every;
1422         r->before = now;
1423         r->after = now;
1424
1425         //info("RRD2RRDR(): %s: STARTING", st->id);
1426
1427         long slot = start_at_slot, counter = 0, stop_now = 0, added = 0, group_count = 0, add_this = 0;
1428         for(; !stop_now ; now -= dt, slot--, counter++) {
1429                 if(unlikely(slot < 0)) slot = st->entries - 1;
1430                 if(unlikely(slot == stop_at_slot)) stop_now = counter;
1431
1432                 if(unlikely(debug)) debug(D_RRD_STATS, "ROW %s slot: %ld, entries_counter: %ld, group_count: %ld, added: %ld, now: %lu, %s %s"
1433                                 , st->id
1434                                 , slot
1435                                 , counter
1436                                 , group_count + 1
1437                                 , added
1438                                 , now
1439                                 , (group_count + 1 == group)?"PRINT":"  -  "
1440                                 , (now >= after && now <= before)?"RANGE":"  -  "
1441                                 );
1442
1443                 // make sure we return data in the proper time range
1444                 if(unlikely(now > before)) continue;
1445                 if(unlikely(now < after)) break;
1446
1447                 if(unlikely(group_count == 0)) {
1448                         group_start_t = now;
1449                 }
1450                 group_count++;
1451
1452                 if(unlikely(group_count == group)) {
1453                         if(unlikely(added >= points)) break;
1454                         add_this = 1;
1455                 }
1456
1457                 // do the calculations
1458                 for(rd = st->dimensions, c = 0 ; rd && c < dimensions ; rd = rd->next, c++) {
1459                         storage_number n = rd->values[slot];
1460                         if(unlikely(!does_storage_number_exist(n))) continue;
1461
1462                         group_counts[c]++;
1463
1464                         calculated_number value = unpack_storage_number(n);
1465                         if(likely(value != 0.0)) {
1466                                 group_options[c] |= RRDR_NONZERO;
1467                                 found_non_zero[c] = 1;
1468                         }
1469
1470                         if(unlikely(did_storage_number_reset(n)))
1471                                 group_options[c] |= RRDR_RESET;
1472
1473                         switch(group_method) {
1474                                 case GROUP_MAX:
1475                                         if(unlikely(fabsl(value) > fabsl(group_values[c])))
1476                                                 group_values[c] = value;
1477                                         break;
1478
1479                                 default:
1480                                 case GROUP_SUM:
1481                                 case GROUP_AVERAGE:
1482                                         group_values[c] += value;
1483                                         break;
1484
1485                                 case GROUP_INCREMENTAL_SUM:
1486                                         if(unlikely(slot == start_at_slot))
1487                                                 last_values[c] = value;
1488
1489                                         group_values[c] += last_values[c] - value;
1490                                         last_values[c] = value;
1491                                         break;
1492                         }
1493                 }
1494
1495                 // added it
1496                 if(unlikely(add_this)) {
1497                         if(unlikely(!rrdr_line_init(r, group_start_t))) break;
1498
1499                         r->after = now;
1500
1501                         calculated_number *cn = rrdr_line_values(r);
1502                         uint8_t *co = rrdr_line_options(r);
1503
1504                         for(rd = st->dimensions, c = 0 ; rd && c < dimensions ; rd = rd->next, c++) {
1505
1506                                 // update the dimension options
1507                                 if(likely(found_non_zero[c])) r->od[c] |= RRDR_NONZERO;
1508
1509                                 // store the specific point options
1510                                 co[c] = group_options[c];
1511
1512                                 // store the value
1513                                 if(unlikely(group_counts[c] == 0)) {
1514                                         cn[c] = 0.0;
1515                                         co[c] |= RRDR_EMPTY;
1516                                 }
1517                                 else if(unlikely(group_method == GROUP_AVERAGE)) {
1518                                         // GROUP_AVERAGE
1519                                         cn[c] = group_values[c] / group_counts[c];
1520                                 }
1521                                 else {
1522                                         // GROUP_SUM
1523                                         // GROUP_MAX
1524                                         // GROUP_INCREMENTAL_SUM
1525                                         cn[c] = group_values[c];
1526                                 }
1527
1528                                 if(cn[c] < r->min) r->min = cn[c];
1529                                 if(cn[c] > r->max) r->max = cn[c];
1530
1531                                 // reset them for the next loop
1532                                 group_values[c] = 0;
1533                                 group_counts[c] = 0;
1534                                 group_options[c] = 0;
1535                         }
1536
1537                         added++;
1538                         group_count = 0;
1539                         add_this = 0;
1540                 }
1541         }
1542
1543         rrdr_done(r);
1544         //info("RRD2RRDR(): %s: END %ld loops made, %ld points generated", st->id, counter, rrdr_rows(r));
1545         //error("SHIFT: %s: wanted %ld points, got %ld", st->id, points, rrdr_rows(r));
1546         return r;
1547 }
1548
1549 int rrd2value(RRDSET *st, BUFFER *wb, calculated_number *n, BUFFER *dimensions, long points, long long after, long long before, int group_method, uint32_t options, time_t *latest_timestamp, int *value_is_null)
1550 {
1551         RRDR *r = rrd2rrdr(st, points, after, before, group_method, !(options & RRDR_OPTION_NOT_ALIGNED));
1552         if(!r) {
1553                 if(value_is_null) *value_is_null = 1;
1554                 return 500;
1555         }
1556
1557         if(rrdr_rows(r) == 0) {
1558                 rrdr_free(r);
1559                 if(value_is_null) *value_is_null = 1;
1560                 return 400;
1561         }
1562
1563         if(r->result_options & RRDR_RESULT_OPTION_RELATIVE)
1564                 wb->options |= WB_CONTENT_NO_CACHEABLE;
1565         else if(r->result_options & RRDR_RESULT_OPTION_ABSOLUTE)
1566                 wb->options |= WB_CONTENT_CACHEABLE;
1567
1568         options = rrdr_check_options(r, options, (dimensions)?buffer_tostring(dimensions):NULL);
1569
1570         if(dimensions)
1571                 rrdr_disable_not_selected_dimensions(r, buffer_tostring(dimensions));
1572
1573         if(latest_timestamp)
1574                 *latest_timestamp = r->before;
1575
1576         long i = (options & RRDR_OPTION_REVERSED)?rrdr_rows(r) - 1:0;
1577         *n = rrdr2value(r, i, options, value_is_null);
1578
1579         rrdr_free(r);
1580         return 200;
1581 }
1582
1583 int rrd2format(RRDSET *st, BUFFER *wb, BUFFER *dimensions, uint32_t format, long points, long long after, long long before, int group_method, uint32_t options, time_t *latest_timestamp)
1584 {
1585         RRDR *r = rrd2rrdr(st, points, after, before, group_method, !(options & RRDR_OPTION_NOT_ALIGNED));
1586         if(!r) {
1587                 buffer_strcat(wb, "Cannot generate output with these parameters on this chart.");
1588                 return 500;
1589         }
1590
1591         if(r->result_options & RRDR_RESULT_OPTION_RELATIVE)
1592                 wb->options |= WB_CONTENT_NO_CACHEABLE;
1593         else if(r->result_options & RRDR_RESULT_OPTION_ABSOLUTE)
1594                 wb->options |= WB_CONTENT_CACHEABLE;
1595
1596         options = rrdr_check_options(r, options, (dimensions)?buffer_tostring(dimensions):NULL);
1597
1598         if(dimensions)
1599                 rrdr_disable_not_selected_dimensions(r, buffer_tostring(dimensions));
1600
1601         if(latest_timestamp && rrdr_rows(r) > 0)
1602                 *latest_timestamp = r->before;
1603
1604         switch(format) {
1605         case DATASOURCE_SSV:
1606                 if(options & RRDR_OPTION_JSON_WRAP) {
1607                         wb->contenttype = CT_APPLICATION_JSON;
1608                         rrdr_json_wrapper_begin(r, wb, format, options, 1);
1609                         rrdr2ssv(r, wb, options, "", " ", "");
1610                         rrdr_json_wrapper_end(r, wb, format, options, 1);
1611                 }
1612                 else {
1613                         wb->contenttype = CT_TEXT_PLAIN;
1614                         rrdr2ssv(r, wb, options, "", " ", "");
1615                 }
1616                 break;
1617
1618         case DATASOURCE_SSV_COMMA:
1619                 if(options & RRDR_OPTION_JSON_WRAP) {
1620                         wb->contenttype = CT_APPLICATION_JSON;
1621                         rrdr_json_wrapper_begin(r, wb, format, options, 1);
1622                         rrdr2ssv(r, wb, options, "", ",", "");
1623                         rrdr_json_wrapper_end(r, wb, format, options, 1);
1624                 }
1625                 else {
1626                         wb->contenttype = CT_TEXT_PLAIN;
1627                         rrdr2ssv(r, wb, options, "", ",", "");
1628                 }
1629                 break;
1630
1631         case DATASOURCE_JS_ARRAY:
1632                 if(options & RRDR_OPTION_JSON_WRAP) {
1633                         wb->contenttype = CT_APPLICATION_JSON;
1634                         rrdr_json_wrapper_begin(r, wb, format, options, 0);
1635                         rrdr2ssv(r, wb, options, "[", ",", "]");
1636                         rrdr_json_wrapper_end(r, wb, format, options, 0);
1637                 }
1638                 else {
1639                         wb->contenttype = CT_APPLICATION_JSON;
1640                         rrdr2ssv(r, wb, options, "[", ",", "]");
1641                 }
1642                 break;
1643
1644         case DATASOURCE_CSV:
1645                 if(options & RRDR_OPTION_JSON_WRAP) {
1646                         wb->contenttype = CT_APPLICATION_JSON;
1647                         rrdr_json_wrapper_begin(r, wb, format, options, 1);
1648                         rrdr2csv(r, wb, options, "", ",", "\\n", "");
1649                         rrdr_json_wrapper_end(r, wb, format, options, 1);
1650                 }
1651                 else {
1652                         wb->contenttype = CT_TEXT_PLAIN;
1653                         rrdr2csv(r, wb, options, "", ",", "\r\n", "");
1654                 }
1655                 break;
1656
1657         case DATASOURCE_CSV_JSON_ARRAY:
1658                 wb->contenttype = CT_APPLICATION_JSON;
1659                 if(options & RRDR_OPTION_JSON_WRAP) {
1660                         rrdr_json_wrapper_begin(r, wb, format, options, 0);
1661                         buffer_strcat(wb, "[\n");
1662                         rrdr2csv(r, wb, options + RRDR_OPTION_LABEL_QUOTES, "[", ",", "]", ",\n");
1663                         buffer_strcat(wb, "\n]");
1664                         rrdr_json_wrapper_end(r, wb, format, options, 0);
1665                 }
1666                 else {
1667                         wb->contenttype = CT_TEXT_PLAIN;
1668                         buffer_strcat(wb, "[\n");
1669                         rrdr2csv(r, wb, options + RRDR_OPTION_LABEL_QUOTES, "[", ",", "]", ",\n");
1670                         buffer_strcat(wb, "\n]");
1671                 }
1672                 break;
1673
1674         case DATASOURCE_TSV:
1675                 if(options & RRDR_OPTION_JSON_WRAP) {
1676                         wb->contenttype = CT_APPLICATION_JSON;
1677                         rrdr_json_wrapper_begin(r, wb, format, options, 1);
1678                         rrdr2csv(r, wb, options, "", "\t", "\\n", "");
1679                         rrdr_json_wrapper_end(r, wb, format, options, 1);
1680                 }
1681                 else {
1682                         wb->contenttype = CT_TEXT_PLAIN;
1683                         rrdr2csv(r, wb, options, "", "\t", "\r\n", "");
1684                 }
1685                 break;
1686
1687         case DATASOURCE_HTML:
1688                 if(options & RRDR_OPTION_JSON_WRAP) {
1689                         wb->contenttype = CT_APPLICATION_JSON;
1690                         rrdr_json_wrapper_begin(r, wb, format, options, 1);
1691                         buffer_strcat(wb, "<html>\\n<center>\\n<table border=\\\"0\\\" cellpadding=\\\"5\\\" cellspacing=\\\"5\\\">\\n");
1692                         rrdr2csv(r, wb, options, "<tr><td>", "</td><td>", "</td></tr>\\n", "");
1693                         buffer_strcat(wb, "</table>\\n</center>\\n</html>\\n");
1694                         rrdr_json_wrapper_end(r, wb, format, options, 1);
1695                 }
1696                 else {
1697                         wb->contenttype = CT_TEXT_HTML;
1698                         buffer_strcat(wb, "<html>\n<center>\n<table border=\"0\" cellpadding=\"5\" cellspacing=\"5\">\n");
1699                         rrdr2csv(r, wb, options, "<tr><td>", "</td><td>", "</td></tr>\n", "");
1700                         buffer_strcat(wb, "</table>\n</center>\n</html>\n");
1701                 }
1702                 break;
1703
1704         case DATASOURCE_DATATABLE_JSONP:
1705                 wb->contenttype = CT_APPLICATION_X_JAVASCRIPT;
1706
1707                 if(options & RRDR_OPTION_JSON_WRAP)
1708                         rrdr_json_wrapper_begin(r, wb, format, options, 0);
1709
1710                 rrdr2json(r, wb, options, 1);
1711
1712                 if(options & RRDR_OPTION_JSON_WRAP)
1713                         rrdr_json_wrapper_end(r, wb, format, options, 0);
1714                 break;
1715
1716         case DATASOURCE_DATATABLE_JSON:
1717                 wb->contenttype = CT_APPLICATION_JSON;
1718
1719                 if(options & RRDR_OPTION_JSON_WRAP)
1720                         rrdr_json_wrapper_begin(r, wb, format, options, 0);
1721
1722                 rrdr2json(r, wb, options, 1);
1723
1724                 if(options & RRDR_OPTION_JSON_WRAP)
1725                         rrdr_json_wrapper_end(r, wb, format, options, 0);
1726                 break;
1727
1728         case DATASOURCE_JSONP:
1729                 wb->contenttype = CT_APPLICATION_X_JAVASCRIPT;
1730                 if(options & RRDR_OPTION_JSON_WRAP)
1731                         rrdr_json_wrapper_begin(r, wb, format, options, 0);
1732
1733                 rrdr2json(r, wb, options, 0);
1734
1735                 if(options & RRDR_OPTION_JSON_WRAP)
1736                         rrdr_json_wrapper_end(r, wb, format, options, 0);
1737                 break;
1738
1739         case DATASOURCE_JSON:
1740         default:
1741                 wb->contenttype = CT_APPLICATION_JSON;
1742
1743                 if(options & RRDR_OPTION_JSON_WRAP)
1744                         rrdr_json_wrapper_begin(r, wb, format, options, 0);
1745
1746                 rrdr2json(r, wb, options, 0);
1747
1748                 if(options & RRDR_OPTION_JSON_WRAP)
1749                         rrdr_json_wrapper_end(r, wb, format, options, 0);
1750                 break;
1751         }
1752
1753         rrdr_free(r);
1754         return 200;
1755 }
1756
1757 time_t rrd_stats_json(int type, RRDSET *st, BUFFER *wb, long points, long group, int group_method, time_t after, time_t before, int only_non_zero)
1758 {
1759         int c;
1760         pthread_rwlock_rdlock(&st->rwlock);
1761
1762
1763         // -------------------------------------------------------------------------
1764         // switch from JSON to google JSON
1765
1766         char kq[2] = "\"";
1767         char sq[2] = "\"";
1768         switch(type) {
1769                 case DATASOURCE_DATATABLE_JSON:
1770                 case DATASOURCE_DATATABLE_JSONP:
1771                         kq[0] = '\0';
1772                         sq[0] = '\'';
1773                         break;
1774
1775                 case DATASOURCE_JSON:
1776                 default:
1777                         break;
1778         }
1779
1780
1781         // -------------------------------------------------------------------------
1782         // validate the parameters
1783
1784         if(points < 1) points = 1;
1785         if(group < 1) group = 1;
1786
1787         if(before == 0 || before > rrdset_last_entry_t(st)) before = rrdset_last_entry_t(st);
1788         if(after  == 0 || after < rrdset_first_entry_t(st)) after = rrdset_first_entry_t(st);
1789
1790         // ---
1791
1792         // our return value (the last timestamp printed)
1793         // this is required to detect re-transmit in google JSONP
1794         time_t last_timestamp = 0;
1795
1796
1797         // -------------------------------------------------------------------------
1798         // find how many dimensions we have
1799
1800         int dimensions = 0;
1801         RRDDIM *rd;
1802         for( rd = st->dimensions ; rd ; rd = rd->next) dimensions++;
1803         if(!dimensions) {
1804                 pthread_rwlock_unlock(&st->rwlock);
1805                 buffer_strcat(wb, "No dimensions yet.");
1806                 return 0;
1807         }
1808
1809
1810         // -------------------------------------------------------------------------
1811         // prepare various strings, to speed up the loop
1812
1813         char overflow_annotation[201]; snprintfz(overflow_annotation, 200, ",{%sv%s:%sRESET OR OVERFLOW%s},{%sv%s:%sThe counters have been wrapped.%s}", kq, kq, sq, sq, kq, kq, sq, sq);
1814         char normal_annotation[201];   snprintfz(normal_annotation,   200, ",{%sv%s:null},{%sv%s:null}", kq, kq, kq, kq);
1815         char pre_date[51];             snprintfz(pre_date,             50, "            {%sc%s:[{%sv%s:%s", kq, kq, kq, kq, sq);
1816         char post_date[21];            snprintfz(post_date,            20, "%s}", sq);
1817         char pre_value[21];            snprintfz(pre_value,            20, ",{%sv%s:", kq, kq);
1818         char post_value[21];           strcpy(post_value,                  "}");
1819
1820
1821         // -------------------------------------------------------------------------
1822         // checks for debugging
1823
1824         if(st->debug) {
1825                 debug(D_RRD_STATS, "%s first_entry_t = %lu, last_entry_t = %lu, duration = %lu, after = %lu, before = %lu, duration = %lu, entries_to_show = %lu, group = %lu"
1826                         , st->id
1827                         , rrdset_first_entry_t(st)
1828                         , rrdset_last_entry_t(st)
1829                         , rrdset_last_entry_t(st) - rrdset_first_entry_t(st)
1830                         , after
1831                         , before
1832                         , before - after
1833                         , points
1834                         , group
1835                         );
1836
1837                 if(before < after)
1838                         debug(D_RRD_STATS, "WARNING: %s The newest value in the database (%lu) is earlier than the oldest (%lu)", st->name, before, after);
1839
1840                 if((before - after) > st->entries * st->update_every)
1841                         debug(D_RRD_STATS, "WARNING: %s The time difference between the oldest and the newest entries (%lu) is higher than the capacity of the database (%lu)", st->name, before - after, st->entries * st->update_every);
1842         }
1843
1844
1845         // -------------------------------------------------------------------------
1846         // temp arrays for keeping values per dimension
1847
1848         calculated_number group_values[dimensions]; // keep sums when grouping
1849         int               print_hidden[dimensions]; // keep hidden flags
1850         int               found_non_zero[dimensions];
1851         int               found_non_existing[dimensions];
1852
1853         // initialize them
1854         for( rd = st->dimensions, c = 0 ; rd && c < dimensions ; rd = rd->next, c++) {
1855                 group_values[c] = 0;
1856                 print_hidden[c] = (rd->flags & RRDDIM_FLAG_HIDDEN)?1:0;
1857                 found_non_zero[c] = 0;
1858                 found_non_existing[c] = 0;
1859         }
1860
1861
1862         // error("OLD: points=%d after=%d before=%d group=%d, duration=%d", entries_to_show, before - (st->update_every * group * entries_to_show), before, group, before - after + 1);
1863         // rrd2array(st, entries_to_show, before - (st->update_every * group * entries_to_show), before, group_method, only_non_zero);
1864         // rrd2rrdr(st, entries_to_show, before - (st->update_every * group * entries_to_show), before, group_method);
1865
1866         // -------------------------------------------------------------------------
1867         // remove dimensions that contain only zeros
1868
1869         int max_loop = 1;
1870         if(only_non_zero) max_loop = 2;
1871
1872         for(; max_loop ; max_loop--) {
1873
1874                 // -------------------------------------------------------------------------
1875                 // print the JSON header
1876
1877                 buffer_sprintf(wb, "{\n %scols%s:\n     [\n", kq, kq);
1878                 buffer_sprintf(wb, "            {%sid%s:%s%s,%slabel%s:%stime%s,%spattern%s:%s%s,%stype%s:%sdatetime%s},\n", kq, kq, sq, sq, kq, kq, sq, sq, kq, kq, sq, sq, kq, kq, sq, sq);
1879                 buffer_sprintf(wb, "            {%sid%s:%s%s,%slabel%s:%s%s,%spattern%s:%s%s,%stype%s:%sstring%s,%sp%s:{%srole%s:%sannotation%s}},\n", kq, kq, sq, sq, kq, kq, sq, sq, kq, kq, sq, sq, kq, kq, sq, sq, kq, kq, kq, kq, sq, sq);
1880                 buffer_sprintf(wb, "            {%sid%s:%s%s,%slabel%s:%s%s,%spattern%s:%s%s,%stype%s:%sstring%s,%sp%s:{%srole%s:%sannotationText%s}}", kq, kq, sq, sq, kq, kq, sq, sq, kq, kq, sq, sq, kq, kq, sq, sq, kq, kq, kq, kq, sq, sq);
1881
1882                 // print the header for each dimension
1883                 // and update the print_hidden array for the dimensions that should be hidden
1884                 int pc = 0;
1885                 for( rd = st->dimensions, c = 0 ; rd && c < dimensions ; rd = rd->next, c++) {
1886                         if(!print_hidden[c]) {
1887                                 pc++;
1888                                 buffer_sprintf(wb, ",\n         {%sid%s:%s%s,%slabel%s:%s%s%s,%spattern%s:%s%s,%stype%s:%snumber%s}", kq, kq, sq, sq, kq, kq, sq, rd->name, sq, kq, kq, sq, sq, kq, kq, sq, sq);
1889                         }
1890                 }
1891                 if(!pc) {
1892                         buffer_sprintf(wb, ",\n         {%sid%s:%s%s,%slabel%s:%s%s%s,%spattern%s:%s%s,%stype%s:%snumber%s}", kq, kq, sq, sq, kq, kq, sq, "no data", sq, kq, kq, sq, sq, kq, kq, sq, sq);
1893                 }
1894
1895                 // print the begin of row data
1896                 buffer_sprintf(wb, "\n  ],\n    %srows%s:\n     [\n", kq, kq);
1897
1898
1899                 // -------------------------------------------------------------------------
1900                 // the main loop
1901
1902                 int annotate_reset = 0;
1903                 int annotation_count = 0;
1904
1905                 long    t = rrdset_time2slot(st, before),
1906                                 stop_at_t = rrdset_time2slot(st, after),
1907                                 stop_now = 0;
1908
1909                 t -= t % group;
1910
1911                 time_t  now = rrdset_slot2time(st, t),
1912                                 dt = st->update_every;
1913
1914                 long count = 0, printed = 0, group_count = 0;
1915                 last_timestamp = 0;
1916
1917                 if(st->debug) debug(D_RRD_STATS, "%s: REQUEST after:%u before:%u, points:%ld, group:%ld, CHART cur:%ld first: %u last:%u, CALC start_t:%ld, stop_t:%ld"
1918                                         , st->id
1919                                         , (uint32_t)after
1920                                         , (uint32_t)before
1921                                         , points
1922                                         , group
1923                                         , st->current_entry
1924                                         , (uint32_t)rrdset_first_entry_t(st)
1925                                         , (uint32_t)rrdset_last_entry_t(st)
1926                                         , t
1927                                         , stop_at_t
1928                                         );
1929
1930                 long counter = 0;
1931                 for(; !stop_now ; now -= dt, t--, counter++) {
1932                         if(t < 0) t = st->entries - 1;
1933                         if(t == stop_at_t) stop_now = counter;
1934
1935                         int print_this = 0;
1936
1937                         if(st->debug) debug(D_RRD_STATS, "%s t = %ld, count = %ld, group_count = %ld, printed = %ld, now = %lu, %s %s"
1938                                         , st->id
1939                                         , t
1940                                         , count + 1
1941                                         , group_count + 1
1942                                         , printed
1943                                         , now
1944                                         , (group_count + 1 == group)?"PRINT":"  -  "
1945                                         , (now >= after && now <= before)?"RANGE":"  -  "
1946                                         );
1947
1948
1949                         // make sure we return data in the proper time range
1950                         if(now > before) continue;
1951                         if(now < after) break;
1952
1953                         //if(rrdset_slot2time(st, t) != now)
1954                         //      error("%s: slot=%ld, now=%ld, slot2time=%ld, diff=%ld, last_entry_t=%ld, rrdset_last_slot=%ld", st->id, t, now, rrdset_slot2time(st,t), now - rrdset_slot2time(st,t), rrdset_last_entry_t(st), rrdset_last_slot(st));
1955
1956                         count++;
1957                         group_count++;
1958
1959                         // check if we have to print this now
1960                         if(group_count == group) {
1961                                 if(printed >= points) {
1962                                         // debug(D_RRD_STATS, "Already printed all rows. Stopping.");
1963                                         break;
1964                                 }
1965
1966                                 // generate the local date time
1967                                 struct tm tmbuf, *tm = localtime_r(&now, &tmbuf);
1968                                 if(!tm) { error("localtime() failed."); continue; }
1969                                 if(now > last_timestamp) last_timestamp = now;
1970
1971                                 if(printed) buffer_strcat(wb, "]},\n");
1972                                 buffer_strcat(wb, pre_date);
1973                                 buffer_jsdate(wb, tm->tm_year + 1900, tm->tm_mon, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec);
1974                                 buffer_strcat(wb, post_date);
1975
1976                                 print_this = 1;
1977                         }
1978
1979                         // do the calculations
1980                         for(rd = st->dimensions, c = 0 ; rd && c < dimensions ; rd = rd->next, c++) {
1981                                 storage_number n = rd->values[t];
1982                                 calculated_number value = unpack_storage_number(n);
1983
1984                                 if(!does_storage_number_exist(n)) {
1985                                         value = 0.0;
1986                                         found_non_existing[c]++;
1987                                 }
1988                                 if(did_storage_number_reset(n)) annotate_reset = 1;
1989
1990                                 switch(group_method) {
1991                                         case GROUP_MAX:
1992                                                 if(abs(value) > abs(group_values[c])) group_values[c] = value;
1993                                                 break;
1994
1995                                         case GROUP_SUM:
1996                                                 group_values[c] += value;
1997                                                 break;
1998
1999                                         default:
2000                                         case GROUP_AVERAGE:
2001                                                 group_values[c] += value;
2002                                                 if(print_this) group_values[c] /= ( group_count - found_non_existing[c] );
2003                                                 break;
2004                                 }
2005                         }
2006
2007                         if(print_this) {
2008                                 if(annotate_reset) {
2009                                         annotation_count++;
2010                                         buffer_strcat(wb, overflow_annotation);
2011                                         annotate_reset = 0;
2012                                 }
2013                                 else
2014                                         buffer_strcat(wb, normal_annotation);
2015
2016                                 pc = 0;
2017                                 for(c = 0 ; c < dimensions ; c++) {
2018                                         if(found_non_existing[c] == group_count) {
2019                                                 // all entries are non-existing
2020                                                 pc++;
2021                                                 buffer_strcat(wb, pre_value);
2022                                                 buffer_strcat(wb, "null");
2023                                                 buffer_strcat(wb, post_value);
2024                                         }
2025                                         else if(!print_hidden[c]) {
2026                                                 pc++;
2027                                                 buffer_strcat(wb, pre_value);
2028                                                 buffer_rrd_value(wb, group_values[c]);
2029                                                 buffer_strcat(wb, post_value);
2030
2031                                                 if(group_values[c]) found_non_zero[c]++;
2032                                         }
2033
2034                                         // reset them for the next loop
2035                                         group_values[c] = 0;
2036                                         found_non_existing[c] = 0;
2037                                 }
2038
2039                                 // if all dimensions are hidden, print a null
2040                                 if(!pc) {
2041                                         buffer_strcat(wb, pre_value);
2042                                         buffer_strcat(wb, "null");
2043                                         buffer_strcat(wb, post_value);
2044                                 }
2045
2046                                 printed++;
2047                                 group_count = 0;
2048                         }
2049                 }
2050
2051                 if(printed) buffer_strcat(wb, "]}");
2052                 buffer_strcat(wb, "\n   ]\n}\n");
2053
2054                 if(only_non_zero && max_loop > 1) {
2055                         int changed = 0;
2056                         for(rd = st->dimensions, c = 0 ; rd && c < dimensions ; rd = rd->next, c++) {
2057                                 group_values[c] = 0;
2058                                 found_non_existing[c] = 0;
2059
2060                                 if(!print_hidden[c] && !found_non_zero[c]) {
2061                                         changed = 1;
2062                                         print_hidden[c] = 1;
2063                                 }
2064                         }
2065
2066                         if(changed) buffer_flush(wb);
2067                         else break;
2068                 }
2069                 else break;
2070
2071         } // max_loop
2072
2073         debug(D_RRD_STATS, "RRD_STATS_JSON: %s total %ld bytes", st->name, wb->len);
2074
2075         pthread_rwlock_unlock(&st->rwlock);
2076         return last_timestamp;
2077 }