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