src/rrd2json.c

   1 #include "common.h"
   2
   3 void rrd_stats_api_v1_chart_with_data(RRDSET *st, BUFFER *wb, size_t *dimensions_count, size_t *memory_used)
   4 {
   5     rrdset_rdlock(st);
   6
   7     buffer_sprintf(wb,
   8         "\t\t{\n"
   9         "\t\t\t\"id\": \"%s\",\n"
  10         "\t\t\t\"name\": \"%s\",\n"
  11         "\t\t\t\"type\": \"%s\",\n"
  12         "\t\t\t\"family\": \"%s\",\n"
  13         "\t\t\t\"context\": \"%s\",\n"
  14         "\t\t\t\"title\": \"%s\",\n"
  15         "\t\t\t\"priority\": %ld,\n"
  16         "\t\t\t\"enabled\": %s,\n"
  17         "\t\t\t\"units\": \"%s\",\n"
  18         "\t\t\t\"data_url\": \"/api/v1/data?chart=%s\",\n"
  19         "\t\t\t\"chart_type\": \"%s\",\n"
  20         "\t\t\t\"duration\": %ld,\n"
  21         "\t\t\t\"first_entry\": %ld,\n"
  22         "\t\t\t\"last_entry\": %ld,\n"
  23         "\t\t\t\"update_every\": %d,\n"
  24         "\t\t\t\"dimensions\": {\n"
  25         , st->id
  26         , st->name
  27         , st->type
  28         , st->family
  29         , st->context
  30         , st->title
  31         , st->priority
  32         , rrdset_flag_check(st, RRDSET_FLAG_ENABLED)?"true":"false"
  33         , st->units
  34         , st->name
  35         , rrdset_type_name(st->chart_type)
  36         , st->entries * st->update_every
  37         , rrdset_first_entry_t(st)
  38         , rrdset_last_entry_t(st)
  39         , st->update_every
  40         );
  41
  42     unsigned long memory = st->memsize;
  43
  44     size_t dimensions = 0;
  45     RRDDIM *rd;
  46     for(rd = st->dimensions; rd ; rd = rd->next) {
  47         if(rrddim_flag_check(rd, RRDDIM_FLAG_HIDDEN)) continue;
  48
  49         memory += rd->memsize;
  50
  51         buffer_sprintf(wb,
  52             "%s"
  53             "\t\t\t\t\"%s\": { \"name\": \"%s\" }"
  54             , dimensions?",\n":""
  55             , rd->id
  56             , rd->name
  57             );
  58
  59         dimensions++;
  60     }
  61
  62     if(dimensions_count) *dimensions_count += dimensions;
  63     if(memory_used) *memory_used += memory;
  64
  65     buffer_strcat(wb, "\n\t\t\t},\n\t\t\t\"green\": ");
  66     buffer_rrd_value(wb, st->green);
  67     buffer_strcat(wb, ",\n\t\t\t\"red\": ");
  68     buffer_rrd_value(wb, st->red);
  69
  70     buffer_sprintf(wb,
  71         "\n\t\t}"
  72         );
  73
  74     rrdset_unlock(st);
  75 }
  76
  77 void rrd_stats_api_v1_chart(RRDSET *st, BUFFER *wb) {
  78     rrd_stats_api_v1_chart_with_data(st, wb, NULL, NULL);
  79 }
  80
  81 void rrd_stats_api_v1_charts(RRDHOST *host, BUFFER *wb)
  82 {
  83     size_t c, dimensions = 0, memory = 0, alarms = 0;
  84     RRDSET *st;
  85
  86     buffer_sprintf(wb, "{\n"
  87            "\t\"hostname\": \"%s\""
  88         ",\n\t\"version\": \"%s\""
  89         ",\n\t\"os\": \"%s\""
  90         ",\n\t\"update_every\": %d"
  91         ",\n\t\"history\": %d"
  92         ",\n\t\"charts\": {"
  93         , host->hostname
  94         , program_version
  95         , os_type
  96         , host->rrd_update_every
  97         , host->rrd_history_entries
  98         );
  99
 100     rrdhost_rdlock(host);
 101     for(st = host->rrdset_root, c = 0; st ; st = st->next) {
 102         if(rrdset_flag_check(st, RRDSET_FLAG_ENABLED) && st->dimensions) {
 103             if(c) buffer_strcat(wb, ",");
 104             buffer_strcat(wb, "\n\t\t\"");
 105             buffer_strcat(wb, st->id);
 106             buffer_strcat(wb, "\": ");
 107             rrd_stats_api_v1_chart_with_data(st, wb, &dimensions, &memory);
 108             c++;
 109         }
 110     }
 111
 112     RRDCALC *rc;
 113     for(rc = host->alarms; rc ; rc = rc->next) {
 114         if(rc->rrdset)
 115             alarms++;
 116     }
 117     rrdhost_unlock(host);
 118
 119     buffer_sprintf(wb, "\n\t}"
 120                     ",\n\t\"charts_count\": %zu"
 121                     ",\n\t\"dimensions_count\": %zu"
 122                     ",\n\t\"alarms_count\": %zu"
 123                     ",\n\t\"rrd_memory_bytes\": %zu"
 124                     "\n}\n"
 125                    , c
 126                    , dimensions
 127                    , alarms
 128                    , memory
 129     );
 130 }
 131
 132 // ----------------------------------------------------------------------------
 133 // PROMETHEUS
 134 // /api/v1/allmetrics?format=prometheus
 135
 136 static inline size_t prometheus_name_copy(char *d, const char *s, size_t usable) {
 137     size_t n;
 138
 139     for(n = 0; *s && n < usable ; d++, s++, n++) {
 140         register char c = *s;
 141
 142         if(unlikely(!isalnum(c))) *d = '_';
 143         else *d = c;
 144     }
 145     *d = '\0';
 146
 147     return n;
 148 }
 149
 150 #define PROMETHEUS_ELEMENT_MAX 256
 151
 152 void rrd_stats_api_v1_charts_allmetrics_prometheus(RRDHOST *host, BUFFER *wb) {
 153     rrdhost_rdlock(host);
 154
 155     char hostname[PROMETHEUS_ELEMENT_MAX + 1];
 156     prometheus_name_copy(hostname, config_get("global", "hostname", "localhost"), PROMETHEUS_ELEMENT_MAX);
 157
 158     // for each chart
 159     RRDSET *st;
 160     for(st = host->rrdset_root; st ; st = st->next) {
 161         char chart[PROMETHEUS_ELEMENT_MAX + 1];
 162         prometheus_name_copy(chart, st->id, PROMETHEUS_ELEMENT_MAX);
 163
 164         buffer_strcat(wb, "\n");
 165         if(rrdset_flag_check(st, RRDSET_FLAG_ENABLED) && st->dimensions) {
 166             rrdset_rdlock(st);
 167
 168             // for each dimension
 169             RRDDIM *rd;
 170             for(rd = st->dimensions; rd ; rd = rd->next) {
 171                 if(rd->counter) {
 172                     char dimension[PROMETHEUS_ELEMENT_MAX + 1];
 173                     prometheus_name_copy(dimension, rd->id, PROMETHEUS_ELEMENT_MAX);
 174
 175                     // buffer_sprintf(wb, "# HELP %s.%s %s\n", st->id, rd->id, st->units);
 176
 177                     switch(rd->algorithm) {
 178                         case RRD_ALGORITHM_INCREMENTAL:
 179                         case RRD_ALGORITHM_PCENT_OVER_DIFF_TOTAL:
 180                             buffer_sprintf(wb, "# TYPE %s_%s counter\n", chart, dimension);
 181                             break;
 182
 183                         default:
 184                             buffer_sprintf(wb, "# TYPE %s_%s gauge\n", chart, dimension);
 185                             break;
 186                     }
 187
 188                     // calculated_number n = (calculated_number)rd->last_collected_value * (calculated_number)(abs(rd->multiplier)) / (calculated_number)(abs(rd->divisor));
 189                     // buffer_sprintf(wb, "%s.%s " CALCULATED_NUMBER_FORMAT " %llu\n", st->id, rd->id, n,
 190                     //        (unsigned long long)((rd->last_collected_time.tv_sec * 1000) + (rd->last_collected_time.tv_usec / 1000)));
 191
 192                     buffer_sprintf(wb, "%s_%s{instance=\"%s\"} " COLLECTED_NUMBER_FORMAT " %llu\n",
 193                             chart, dimension, hostname, rd->last_collected_value,
 194                             (unsigned long long)((rd->last_collected_time.tv_sec * 1000) + (rd->last_collected_time.tv_usec / 1000)));
 195
 196                 }
 197             }
 198
 199             rrdset_unlock(st);
 200         }
 201     }
 202
 203     rrdhost_unlock(host);
 204 }
 205
 206 // ----------------------------------------------------------------------------
 207 // BASH
 208 // /api/v1/allmetrics?format=bash
 209
 210 static inline size_t shell_name_copy(char *d, const char *s, size_t usable) {
 211     size_t n;
 212
 213     for(n = 0; *s && n < usable ; d++, s++, n++) {
 214         register char c = *s;
 215
 216         if(unlikely(!isalnum(c))) *d = '_';
 217         else *d = (char)toupper(c);
 218     }
 219     *d = '\0';
 220
 221     return n;
 222 }
 223
 224 #define SHELL_ELEMENT_MAX 100
 225
 226 void rrd_stats_api_v1_charts_allmetrics_shell(RRDHOST *host, BUFFER *wb) {
 227     rrdhost_rdlock(host);
 228
 229     // for each chart
 230     RRDSET *st;
 231     for(st = host->rrdset_root; st ; st = st->next) {
 232         calculated_number total = 0.0;
 233         char chart[SHELL_ELEMENT_MAX + 1];
 234         shell_name_copy(chart, st->id, SHELL_ELEMENT_MAX);
 235
 236         buffer_sprintf(wb, "\n# chart: %s (name: %s)\n", st->id, st->name);
 237         if(rrdset_flag_check(st, RRDSET_FLAG_ENABLED) && st->dimensions) {
 238             rrdset_rdlock(st);
 239
 240             // for each dimension
 241             RRDDIM *rd;
 242             for(rd = st->dimensions; rd ; rd = rd->next) {
 243                 if(rd->counter) {
 244                     char dimension[SHELL_ELEMENT_MAX + 1];
 245                     shell_name_copy(dimension, rd->id, SHELL_ELEMENT_MAX);
 246
 247                     calculated_number n = rd->last_stored_value;
 248
 249                     if(isnan(n) || isinf(n))
 250                         buffer_sprintf(wb, "NETDATA_%s_%s=\"\"      # %s\n", chart, dimension, st->units);
 251                     else {
 252                         if(rd->multiplier < 0 || rd->divisor < 0) n = -n;
 253                         n = roundl(n);
 254                         if(!rrddim_flag_check(rd, RRDDIM_FLAG_HIDDEN)) total += n;
 255                         buffer_sprintf(wb, "NETDATA_%s_%s=\"%0.0Lf\"      # %s\n", chart, dimension, n, st->units);
 256                     }
 257                 }
 258             }
 259
 260             total = roundl(total);
 261             buffer_sprintf(wb, "NETDATA_%s_VISIBLETOTAL=\"%0.0Lf\"      # %s\n", chart, total, st->units);
 262             rrdset_unlock(st);
 263         }
 264     }
 265
 266     buffer_strcat(wb, "\n# NETDATA ALARMS RUNNING\n");
 267
 268     RRDCALC *rc;
 269     for(rc = host->alarms; rc ;rc = rc->next) {
 270         if(!rc->rrdset) continue;
 271
 272         char chart[SHELL_ELEMENT_MAX + 1];
 273         shell_name_copy(chart, rc->rrdset->id, SHELL_ELEMENT_MAX);
 274
 275         char alarm[SHELL_ELEMENT_MAX + 1];
 276         shell_name_copy(alarm, rc->name, SHELL_ELEMENT_MAX);
 277
 278         calculated_number n = rc->value;
 279
 280         if(isnan(n) || isinf(n))
 281             buffer_sprintf(wb, "NETDATA_ALARM_%s_%s_VALUE=\"\"      # %s\n", chart, alarm, rc->units);
 282         else {
 283             n = roundl(n);
 284             buffer_sprintf(wb, "NETDATA_ALARM_%s_%s_VALUE=\"%0.0Lf\"      # %s\n", chart, alarm, n, rc->units);
 285         }
 286
 287         buffer_sprintf(wb, "NETDATA_ALARM_%s_%s_STATUS=\"%s\"\n", chart, alarm, rrdcalc_status2string(rc->status));
 288     }
 289
 290     rrdhost_unlock(host);
 291 }
 292
 293 // ----------------------------------------------------------------------------
 294
 295 unsigned long rrd_stats_one_json(RRDSET *st, char *options, BUFFER *wb)
 296 {
 297     time_t now = now_realtime_sec();
 298
 299     rrdset_rdlock(st);
 300
 301     buffer_sprintf(wb,
 302         "\t\t{\n"
 303         "\t\t\t\"id\": \"%s\",\n"
 304         "\t\t\t\"name\": \"%s\",\n"
 305         "\t\t\t\"type\": \"%s\",\n"
 306         "\t\t\t\"family\": \"%s\",\n"
 307         "\t\t\t\"context\": \"%s\",\n"
 308         "\t\t\t\"title\": \"%s\",\n"
 309         "\t\t\t\"priority\": %ld,\n"
 310         "\t\t\t\"enabled\": %d,\n"
 311         "\t\t\t\"units\": \"%s\",\n"
 312         "\t\t\t\"url\": \"/data/%s/%s\",\n"
 313         "\t\t\t\"chart_type\": \"%s\",\n"
 314         "\t\t\t\"counter\": %lu,\n"
 315         "\t\t\t\"entries\": %ld,\n"
 316         "\t\t\t\"first_entry_t\": %ld,\n"
 317         "\t\t\t\"last_entry\": %lu,\n"
 318         "\t\t\t\"last_entry_t\": %ld,\n"
 319         "\t\t\t\"last_entry_secs_ago\": %ld,\n"
 320         "\t\t\t\"update_every\": %d,\n"
 321         "\t\t\t\"isdetail\": %d,\n"
 322         "\t\t\t\"usec_since_last_update\": %llu,\n"
 323         "\t\t\t\"collected_total\": " TOTAL_NUMBER_FORMAT ",\n"
 324         "\t\t\t\"last_collected_total\": " TOTAL_NUMBER_FORMAT ",\n"
 325         "\t\t\t\"dimensions\": [\n"
 326         , st->id
 327         , st->name
 328         , st->type
 329         , st->family
 330         , st->context
 331         , st->title
 332         , st->priority
 333         , rrdset_flag_check(st, RRDSET_FLAG_ENABLED)?1:0
 334         , st->units
 335         , st->name, options?options:""
 336         , rrdset_type_name(st->chart_type)
 337         , st->counter
 338         , st->entries
 339         , rrdset_first_entry_t(st)
 340         , rrdset_last_slot(st)
 341         , rrdset_last_entry_t(st)
 342         , (now < rrdset_last_entry_t(st)) ? (time_t)0 : now - rrdset_last_entry_t(st)
 343         , st->update_every
 344         , rrdset_flag_check(st, RRDSET_FLAG_DETAIL)?1:0
 345         , st->usec_since_last_update
 346         , st->collected_total
 347         , st->last_collected_total
 348         );
 349
 350     unsigned long memory = st->memsize;
 351
 352     RRDDIM *rd;
 353     for(rd = st->dimensions; rd ; rd = rd->next) {
 354
 355         memory += rd->memsize;
 356
 357         buffer_sprintf(wb,
 358             "\t\t\t\t{\n"
 359             "\t\t\t\t\t\"id\": \"%s\",\n"
 360             "\t\t\t\t\t\"name\": \"%s\",\n"
 361             "\t\t\t\t\t\"entries\": %ld,\n"
 362             "\t\t\t\t\t\"isHidden\": %d,\n"
 363             "\t\t\t\t\t\"algorithm\": \"%s\",\n"
 364             "\t\t\t\t\t\"multiplier\": " COLLECTED_NUMBER_FORMAT ",\n"
 365             "\t\t\t\t\t\"divisor\": " COLLECTED_NUMBER_FORMAT ",\n"
 366             "\t\t\t\t\t\"last_entry_t\": %ld,\n"
 367             "\t\t\t\t\t\"collected_value\": " COLLECTED_NUMBER_FORMAT ",\n"
 368             "\t\t\t\t\t\"calculated_value\": " CALCULATED_NUMBER_FORMAT ",\n"
 369             "\t\t\t\t\t\"last_collected_value\": " COLLECTED_NUMBER_FORMAT ",\n"
 370             "\t\t\t\t\t\"last_calculated_value\": " CALCULATED_NUMBER_FORMAT ",\n"
 371             "\t\t\t\t\t\"memory\": %lu\n"
 372             "\t\t\t\t}%s\n"
 373             , rd->id
 374             , rd->name
 375             , rd->entries
 376             , rrddim_flag_check(rd, RRDDIM_FLAG_HIDDEN)?1:0
 377             , rrd_algorithm_name(rd->algorithm)
 378             , rd->multiplier
 379             , rd->divisor
 380             , rd->last_collected_time.tv_sec
 381             , rd->collected_value
 382             , rd->calculated_value
 383             , rd->last_collected_value
 384             , rd->last_calculated_value
 385             , rd->memsize
 386             , rd->next?",":""
 387             );
 388     }
 389
 390     buffer_sprintf(wb,
 391         "\t\t\t],\n"
 392         "\t\t\t\"memory\" : %lu\n"
 393         "\t\t}"
 394         , memory
 395         );
 396
 397     rrdset_unlock(st);
 398     return memory;
 399 }
 400
 401 #define RRD_GRAPH_JSON_HEADER "{\n\t\"charts\": [\n"
 402 #define RRD_GRAPH_JSON_FOOTER "\n\t]\n}\n"
 403
 404 void rrd_stats_graph_json(RRDSET *st, char *options, BUFFER *wb)
 405 {
 406     buffer_strcat(wb, RRD_GRAPH_JSON_HEADER);
 407     rrd_stats_one_json(st, options, wb);
 408     buffer_strcat(wb, RRD_GRAPH_JSON_FOOTER);
 409 }
 410
 411 void rrd_stats_all_json(RRDHOST *host, BUFFER *wb)
 412 {
 413     unsigned long memory = 0;
 414     long c;
 415     RRDSET *st;
 416
 417     buffer_strcat(wb, RRD_GRAPH_JSON_HEADER);
 418
 419     rrdhost_rdlock(host);
 420
 421     for(st = host->rrdset_root, c = 0; st ; st = st->next) {
 422         if(rrdset_flag_check(st, RRDSET_FLAG_ENABLED) && st->dimensions) {
 423             if(c) buffer_strcat(wb, ",\n");
 424             memory += rrd_stats_one_json(st, NULL, wb);
 425             c++;
 426         }
 427     }
 428
 429     buffer_sprintf(wb, "\n\t],\n"
 430         "\t\"hostname\": \"%s\",\n"
 431         "\t\"update_every\": %d,\n"
 432         "\t\"history\": %d,\n"
 433         "\t\"memory\": %lu\n"
 434         "}\n"
 435         , host->hostname
 436         , host->rrd_update_every
 437         , host->rrd_history_entries
 438         , memory
 439         );
 440
 441     rrdhost_unlock(host);
 442 }
 443
 444
 445
 446 // ----------------------------------------------------------------------------
 447
 448 // RRDR dimension options
 449 #define RRDR_EMPTY      0x01 // the dimension contains / the value is empty (null)
 450 #define RRDR_RESET      0x02 // the dimension contains / the value is reset
 451 #define RRDR_HIDDEN     0x04 // the dimension contains / the value is hidden
 452 #define RRDR_NONZERO    0x08 // the dimension contains / the value is non-zero
 453 #define RRDR_SELECTED   0x10 // the dimension is selected
 454
 455 // RRDR result options
 456 #define RRDR_RESULT_OPTION_ABSOLUTE 0x00000001
 457 #define RRDR_RESULT_OPTION_RELATIVE 0x00000002
 458
 459 typedef struct rrdresult {
 460     RRDSET *st;         // the chart this result refers to
 461
 462     uint32_t result_options;    // RRDR_RESULT_OPTION_*
 463
 464     int d;                  // the number of dimensions
 465     long n;                 // the number of values in the arrays
 466     long rows;              // the number of rows used
 467
 468     uint8_t *od;            // the options for the dimensions
 469
 470     time_t *t;              // array of n timestamps
 471     calculated_number *v;   // array n x d values
 472     uint8_t *o;             // array n x d options
 473
 474     long c;                 // current line ( -1 ~ n ), ( -1 = none, use rrdr_rows() to get number of rows )
 475
 476     long group;             // how many collected values were grouped for each row
 477     int update_every;       // what is the suggested update frequency in seconds
 478
 479     calculated_number min;
 480     calculated_number max;
 481
 482     time_t before;
 483     time_t after;
 484
 485     int has_st_lock;        // if st is read locked by us
 486 } RRDR;
 487
 488 #define rrdr_rows(r) ((r)->rows)
 489
 490 /*
 491 static void rrdr_dump(RRDR *r)
 492 {
 493     long c, i;
 494     RRDDIM *d;
 495
 496     fprintf(stderr, "\nCHART %s (%s)\n", r->st->id, r->st->name);
 497
 498     for(c = 0, d = r->st->dimensions; d ;c++, d = d->next) {
 499         fprintf(stderr, "DIMENSION %s (%s), %s%s%s%s\n"
 500                 , d->id
 501                 , d->name
 502                 , (r->od[c] & RRDR_EMPTY)?"EMPTY ":""
 503                 , (r->od[c] & RRDR_RESET)?"RESET ":""
 504                 , (r->od[c] & RRDR_HIDDEN)?"HIDDEN ":""
 505                 , (r->od[c] & RRDR_NONZERO)?"NONZERO ":""
 506                 );
 507     }
 508
 509     if(r->rows <= 0) {
 510         fprintf(stderr, "RRDR does not have any values in it.\n");
 511         return;
 512     }
 513
 514     fprintf(stderr, "RRDR includes %d values in it:\n", r->rows);
 515
 516     // for each line in the array
 517     for(i = 0; i < r->rows ;i++) {
 518         calculated_number *cn = &r->v[ i * r->d ];
 519         uint8_t *co = &r->o[ i * r->d ];
 520
 521         // print the id and the timestamp of the line
 522         fprintf(stderr, "%ld %ld ", i + 1, r->t[i]);
 523
 524         // for each dimension
 525         for(c = 0, d = r->st->dimensions; d ;c++, d = d->next) {
 526             if(unlikely(r->od[c] & RRDR_HIDDEN)) continue;
 527             if(unlikely(!(r->od[c] & RRDR_NONZERO))) continue;
 528
 529             if(co[c] & RRDR_EMPTY)
 530                 fprintf(stderr, "null ");
 531             else
 532                 fprintf(stderr, CALCULATED_NUMBER_FORMAT " %s%s%s%s "
 533                     , cn[c]
 534                     , (co[c] & RRDR_EMPTY)?"E":" "
 535                     , (co[c] & RRDR_RESET)?"R":" "
 536                     , (co[c] & RRDR_HIDDEN)?"H":" "
 537                     , (co[c] & RRDR_NONZERO)?"N":" "
 538                     );
 539         }
 540
 541         fprintf(stderr, "\n");
 542     }
 543 }
 544 */
 545
 546 void rrdr_disable_not_selected_dimensions(RRDR *r, uint32_t options, const char *dims) {
 547     if(unlikely(!dims || !*dims)) return;
 548
 549     char b[strlen(dims) + 1];
 550     char *o = b, *tok;
 551     strcpy(o, dims);
 552
 553     long c, dims_selected = 0, dims_not_hidden_not_zero = 0;
 554     RRDDIM *d;
 555
 556     // disable all of them
 557     for(c = 0, d = r->st->dimensions; d ;c++, d = d->next)
 558         r->od[c] |= RRDR_HIDDEN;
 559
 560     while(o && *o && (tok = mystrsep(&o, ",|"))) {
 561         if(!*tok) continue;
 562
 563         uint32_t hash = simple_hash(tok);
 564
 565         // find it and enable it
 566         for(c = 0, d = r->st->dimensions; d ;c++, d = d->next) {
 567             if(unlikely((hash == d->hash && !strcmp(d->id, tok)) || (hash == d->hash_name && !strcmp(d->name, tok)))) {
 568
 569                 if(likely(r->od[c] & RRDR_HIDDEN)) {
 570                     r->od[c] |= RRDR_SELECTED;
 571                     r->od[c] &= ~RRDR_HIDDEN;
 572                     dims_selected++;
 573                 }
 574
 575                 // since the user needs this dimension
 576                 // make it appear as NONZERO, to return it
 577                 // even if the dimension has only zeros
 578                 // unless option non_zero is set
 579                 if(likely(!(options & RRDR_OPTION_NONZERO)))
 580                     r->od[c] |= RRDR_NONZERO;
 581
 582                 // count the visible dimensions
 583                 if(likely(r->od[c] & RRDR_NONZERO))
 584                     dims_not_hidden_not_zero++;
 585             }
 586         }
 587     }
 588
 589     // check if all dimensions are hidden
 590     if(unlikely(!dims_not_hidden_not_zero && dims_selected)) {
 591         // there are a few selected dimensions
 592         // but they are all zero
 593         // enable the selected ones
 594         // to avoid returning an empty chart
 595         for(c = 0, d = r->st->dimensions; d ;c++, d = d->next)
 596             if(unlikely(r->od[c] & RRDR_SELECTED))
 597                 r->od[c] |= RRDR_NONZERO;
 598     }
 599 }
 600
 601 void rrdr_buffer_print_format(BUFFER *wb, uint32_t format)
 602 {
 603     switch(format) {
 604     case DATASOURCE_JSON:
 605         buffer_strcat(wb, DATASOURCE_FORMAT_JSON);
 606         break;
 607
 608     case DATASOURCE_DATATABLE_JSON:
 609         buffer_strcat(wb, DATASOURCE_FORMAT_DATATABLE_JSON);
 610         break;
 611
 612     case DATASOURCE_DATATABLE_JSONP:
 613         buffer_strcat(wb, DATASOURCE_FORMAT_DATATABLE_JSONP);
 614         break;
 615
 616     case DATASOURCE_JSONP:
 617         buffer_strcat(wb, DATASOURCE_FORMAT_JSONP);
 618         break;
 619
 620     case DATASOURCE_SSV:
 621         buffer_strcat(wb, DATASOURCE_FORMAT_SSV);
 622         break;
 623
 624     case DATASOURCE_CSV:
 625         buffer_strcat(wb, DATASOURCE_FORMAT_CSV);
 626         break;
 627
 628     case DATASOURCE_TSV:
 629         buffer_strcat(wb, DATASOURCE_FORMAT_TSV);
 630         break;
 631
 632     case DATASOURCE_HTML:
 633         buffer_strcat(wb, DATASOURCE_FORMAT_HTML);
 634         break;
 635
 636     case DATASOURCE_JS_ARRAY:
 637         buffer_strcat(wb, DATASOURCE_FORMAT_JS_ARRAY);
 638         break;
 639
 640     case DATASOURCE_SSV_COMMA:
 641         buffer_strcat(wb, DATASOURCE_FORMAT_SSV_COMMA);
 642         break;
 643
 644     default:
 645         buffer_strcat(wb, "unknown");
 646         break;
 647     }
 648 }
 649
 650 uint32_t rrdr_check_options(RRDR *r, uint32_t options, const char *dims)
 651 {
 652     (void)dims;
 653
 654     if(options & RRDR_OPTION_NONZERO) {
 655         long i;
 656
 657         // commented due to #1514
 658
 659         //if(dims && *dims) {
 660             // the caller wants specific dimensions
 661             // disable NONZERO option
 662             // to make sure we don't accidentally prevent
 663             // the specific dimensions from being returned
 664             // i = 0;
 665         //}
 666         //else {
 667             // find how many dimensions are not zero
 668             long c;
 669             RRDDIM *rd;
 670             for(c = 0, i = 0, rd = r->st->dimensions; rd && c < r->d ; c++, rd = rd->next) {
 671                 if(unlikely(r->od[c] & RRDR_HIDDEN)) continue;
 672                 if(unlikely(!(r->od[c] & RRDR_NONZERO))) continue;
 673                 i++;
 674             }
 675         //}
 676
 677         // if with nonzero we get i = 0 (no dimensions will be returned)
 678         // disable nonzero to show all dimensions
 679         if(!i) options &= ~RRDR_OPTION_NONZERO;
 680     }
 681
 682     return options;
 683 }
 684
 685 void rrdr_json_wrapper_begin(RRDR *r, BUFFER *wb, uint32_t format, uint32_t options, int string_value)
 686 {
 687     long rows = rrdr_rows(r);
 688     long c, i;
 689     RRDDIM *rd;
 690
 691     //info("JSONWRAPPER(): %s: BEGIN", r->st->id);
 692     char kq[2] = "",                    // key quote
 693         sq[2] = "";                     // string quote
 694
 695     if( options & RRDR_OPTION_GOOGLE_JSON ) {
 696         kq[0] = '\0';
 697         sq[0] = '\'';
 698     }
 699     else {
 700         kq[0] = '"';
 701         sq[0] = '"';
 702     }
 703
 704     buffer_sprintf(wb, "{\n"
 705             "   %sapi%s: 1,\n"
 706             "   %sid%s: %s%s%s,\n"
 707             "   %sname%s: %s%s%s,\n"
 708             "   %sview_update_every%s: %d,\n"
 709             "   %supdate_every%s: %d,\n"
 710             "   %sfirst_entry%s: %u,\n"
 711             "   %slast_entry%s: %u,\n"
 712             "   %sbefore%s: %u,\n"
 713             "   %safter%s: %u,\n"
 714             "   %sdimension_names%s: ["
 715             , kq, kq
 716             , kq, kq, sq, r->st->id, sq
 717             , kq, kq, sq, r->st->name, sq
 718             , kq, kq, r->update_every
 719             , kq, kq, r->st->update_every
 720             , kq, kq, (uint32_t)rrdset_first_entry_t(r->st)
 721             , kq, kq, (uint32_t)rrdset_last_entry_t(r->st)
 722             , kq, kq, (uint32_t)r->before
 723             , kq, kq, (uint32_t)r->after
 724             , kq, kq);
 725
 726     for(c = 0, i = 0, rd = r->st->dimensions; rd && c < r->d ;c++, rd = rd->next) {
 727         if(unlikely(r->od[c] & RRDR_HIDDEN)) continue;
 728         if(unlikely((options & RRDR_OPTION_NONZERO) && !(r->od[c] & RRDR_NONZERO))) continue;
 729
 730         if(i) buffer_strcat(wb, ", ");
 731         buffer_strcat(wb, sq);
 732         buffer_strcat(wb, rd->name);
 733         buffer_strcat(wb, sq);
 734         i++;
 735     }
 736     if(!i) {
 737 #ifdef NETDATA_INTERNAL_CHECKS
 738         error("RRDR is empty for %s (RRDR has %d dimensions, options is 0x%08x)", r->st->id, r->d, options);
 739 #endif
 740         rows = 0;
 741         buffer_strcat(wb, sq);
 742         buffer_strcat(wb, "no data");
 743         buffer_strcat(wb, sq);
 744     }
 745
 746     buffer_sprintf(wb, "],\n"
 747             "   %sdimension_ids%s: ["
 748             , kq, kq);
 749
 750     for(c = 0, i = 0, rd = r->st->dimensions; rd && c < r->d ;c++, rd = rd->next) {
 751         if(unlikely(r->od[c] & RRDR_HIDDEN)) continue;
 752         if(unlikely((options & RRDR_OPTION_NONZERO) && !(r->od[c] & RRDR_NONZERO))) continue;
 753
 754         if(i) buffer_strcat(wb, ", ");
 755         buffer_strcat(wb, sq);
 756         buffer_strcat(wb, rd->id);
 757         buffer_strcat(wb, sq);
 758         i++;
 759     }
 760     if(!i) {
 761         rows = 0;
 762         buffer_strcat(wb, sq);
 763         buffer_strcat(wb, "no data");
 764         buffer_strcat(wb, sq);
 765     }
 766
 767     buffer_sprintf(wb, "],\n"
 768             "   %slatest_values%s: ["
 769             , kq, kq);
 770
 771     for(c = 0, i = 0, rd = r->st->dimensions; rd && c < r->d ;c++, rd = rd->next) {
 772         if(unlikely(r->od[c] & RRDR_HIDDEN)) continue;
 773         if(unlikely((options & RRDR_OPTION_NONZERO) && !(r->od[c] & RRDR_NONZERO))) continue;
 774
 775         if(i) buffer_strcat(wb, ", ");
 776         i++;
 777
 778         storage_number n = rd->values[rrdset_last_slot(r->st)];
 779
 780         if(!does_storage_number_exist(n))
 781             buffer_strcat(wb, "null");
 782         else
 783             buffer_rrd_value(wb, unpack_storage_number(n));
 784     }
 785     if(!i) {
 786         rows = 0;
 787         buffer_strcat(wb, "null");
 788     }
 789
 790     buffer_sprintf(wb, "],\n"
 791             "   %sview_latest_values%s: ["
 792             , kq, kq);
 793
 794     i = 0;
 795     if(rows) {
 796         for(c = 0, i = 0, rd = r->st->dimensions; rd && c < r->d ;c++, rd = rd->next) {
 797             if(unlikely(r->od[c] & RRDR_HIDDEN)) continue;
 798             if(unlikely((options & RRDR_OPTION_NONZERO) && !(r->od[c] & RRDR_NONZERO))) continue;
 799
 800             if(i) buffer_strcat(wb, ", ");
 801             i++;
 802
 803             calculated_number *cn = &r->v[ (0) * r->d ];
 804             uint8_t *co = &r->o[ (0) * r->d ];
 805
 806             if(co[c] & RRDR_EMPTY)
 807                 buffer_strcat(wb, "null");
 808             else
 809                 buffer_rrd_value(wb, cn[c]);
 810         }
 811     }
 812     if(!i) {
 813         rows = 0;
 814         buffer_strcat(wb, "null");
 815     }
 816
 817     buffer_sprintf(wb, "],\n"
 818             "   %sdimensions%s: %ld,\n"
 819             "   %spoints%s: %ld,\n"
 820             "   %sformat%s: %s"
 821             , kq, kq, i
 822             , kq, kq, rows
 823             , kq, kq, sq
 824             );
 825
 826     rrdr_buffer_print_format(wb, format);
 827
 828     buffer_sprintf(wb, "%s,\n"
 829             "   %sresult%s: "
 830             , sq
 831             , kq, kq
 832             );
 833
 834     if(string_value) buffer_strcat(wb, sq);
 835     //info("JSONWRAPPER(): %s: END", r->st->id);
 836 }
 837
 838 void rrdr_json_wrapper_end(RRDR *r, BUFFER *wb, uint32_t format, uint32_t options, int string_value)
 839 {
 840     (void)format;
 841
 842     char kq[2] = "",                    // key quote
 843         sq[2] = "";                     // string quote
 844
 845     if( options & RRDR_OPTION_GOOGLE_JSON ) {
 846         kq[0] = '\0';
 847         sq[0] = '\'';
 848     }
 849     else {
 850         kq[0] = '"';
 851         sq[0] = '"';
 852     }
 853
 854     if(string_value) buffer_strcat(wb, sq);
 855
 856     buffer_sprintf(wb, ",\n %smin%s: ", kq, kq);
 857     buffer_rrd_value(wb, r->min);
 858     buffer_sprintf(wb, ",\n %smax%s: ", kq, kq);
 859     buffer_rrd_value(wb, r->max);
 860     buffer_strcat(wb, "\n}\n");
 861 }
 862
 863 #define JSON_DATES_JS 1
 864 #define JSON_DATES_TIMESTAMP 2
 865
 866 static void rrdr2json(RRDR *r, BUFFER *wb, uint32_t options, int datatable)
 867 {
 868     //info("RRD2JSON(): %s: BEGIN", r->st->id);
 869     int row_annotations = 0, dates, dates_with_new = 0;
 870     char kq[2] = "",                    // key quote
 871         sq[2] = "",                     // string quote
 872         pre_label[101] = "",            // before each label
 873         post_label[101] = "",           // after each label
 874         pre_date[101] = "",             // the beginning of line, to the date
 875         post_date[101] = "",            // closing the date
 876         pre_value[101] = "",            // before each value
 877         post_value[101] = "",           // after each value
 878         post_line[101] = "",            // at the end of each row
 879         normal_annotation[201] = "",    // default row annotation
 880         overflow_annotation[201] = "",  // overflow row annotation
 881         data_begin[101] = "",           // between labels and values
 882         finish[101] = "";               // at the end of everything
 883
 884     if(datatable) {
 885         dates = JSON_DATES_JS;
 886         if( options & RRDR_OPTION_GOOGLE_JSON ) {
 887             kq[0] = '\0';
 888             sq[0] = '\'';
 889         }
 890         else {
 891             kq[0] = '"';
 892             sq[0] = '"';
 893         }
 894         row_annotations = 1;
 895         snprintfz(pre_date,   100, "        {%sc%s:[{%sv%s:%s", kq, kq, kq, kq, sq);
 896         snprintfz(post_date,  100, "%s}", sq);
 897         snprintfz(pre_label,  100, ",\n     {%sid%s:%s%s,%slabel%s:%s", kq, kq, sq, sq, kq, kq, sq);
 898         snprintfz(post_label, 100, "%s,%spattern%s:%s%s,%stype%s:%snumber%s}", sq, kq, kq, sq, sq, kq, kq, sq, sq);
 899         snprintfz(pre_value,  100, ",{%sv%s:", kq, kq);
 900         strcpy(post_value,         "}");
 901         strcpy(post_line,          "]}");
 902         snprintfz(data_begin, 100, "\n  ],\n    %srows%s:\n [\n", kq, kq);
 903         strcpy(finish,             "\n  ]\n}");
 904
 905         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);
 906         snprintfz(normal_annotation,   200, ",{%sv%s:null},{%sv%s:null}", kq, kq, kq, kq);
 907
 908         buffer_sprintf(wb, "{\n %scols%s:\n [\n", kq, kq);
 909         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);
 910         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);
 911         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);
 912
 913         // remove the valueobjects flag
 914         // google wants its own keys
 915         if(options & RRDR_OPTION_OBJECTSROWS)
 916             options &= ~RRDR_OPTION_OBJECTSROWS;
 917     }
 918     else {
 919         kq[0] = '"';
 920         sq[0] = '"';
 921         if(options & RRDR_OPTION_GOOGLE_JSON) {
 922             dates = JSON_DATES_JS;
 923             dates_with_new = 1;
 924         }
 925         else {
 926             dates = JSON_DATES_TIMESTAMP;
 927             dates_with_new = 0;
 928         }
 929         if( options & RRDR_OPTION_OBJECTSROWS )
 930             strcpy(pre_date, "      { ");
 931         else
 932             strcpy(pre_date, "      [ ");
 933         strcpy(pre_label,  ", \"");
 934         strcpy(post_label, "\"");
 935         strcpy(pre_value,  ", ");
 936         if( options & RRDR_OPTION_OBJECTSROWS )
 937             strcpy(post_line, "}");
 938         else
 939             strcpy(post_line, "]");
 940         snprintfz(data_begin, 100, "],\n    %sdata%s:\n [\n", kq, kq);
 941         strcpy(finish,             "\n  ]\n}");
 942
 943         buffer_sprintf(wb, "{\n %slabels%s: [", kq, kq);
 944         buffer_sprintf(wb, "%stime%s", sq, sq);
 945     }
 946
 947     // -------------------------------------------------------------------------
 948     // print the JSON header
 949
 950     long c, i;
 951     RRDDIM *rd;
 952
 953     // print the header lines
 954     for(c = 0, i = 0, rd = r->st->dimensions; rd && c < r->d ;c++, rd = rd->next) {
 955         if(unlikely(r->od[c] & RRDR_HIDDEN)) continue;
 956         if(unlikely((options & RRDR_OPTION_NONZERO) && !(r->od[c] & RRDR_NONZERO))) continue;
 957
 958         buffer_strcat(wb, pre_label);
 959         buffer_strcat(wb, rd->name);
 960         buffer_strcat(wb, post_label);
 961         i++;
 962     }
 963     if(!i) {
 964         buffer_strcat(wb, pre_label);
 965         buffer_strcat(wb, "no data");
 966         buffer_strcat(wb, post_label);
 967     }
 968
 969     // print the begin of row data
 970     buffer_strcat(wb, data_begin);
 971
 972     // if all dimensions are hidden, print a null
 973     if(!i) {
 974         buffer_strcat(wb, finish);
 975         return;
 976     }
 977
 978     long start = 0, end = rrdr_rows(r), step = 1;
 979     if((options & RRDR_OPTION_REVERSED)) {
 980         start = rrdr_rows(r) - 1;
 981         end = -1;
 982         step = -1;
 983     }
 984
 985     // for each line in the array
 986     calculated_number total = 1;
 987     for(i = start; i != end ;i += step) {
 988         calculated_number *cn = &r->v[ i * r->d ];
 989         uint8_t *co = &r->o[ i * r->d ];
 990
 991         time_t now = r->t[i];
 992
 993         if(dates == JSON_DATES_JS) {
 994             // generate the local date time
 995             struct tm tmbuf, *tm = localtime_r(&now, &tmbuf);
 996             if(!tm) { error("localtime_r() failed."); continue; }
 997
 998             if(likely(i != start)) buffer_strcat(wb, ",\n");
 999             buffer_strcat(wb, pre_date);
1000
1001             if( options & RRDR_OPTION_OBJECTSROWS )
1002                 buffer_sprintf(wb, "%stime%s: ", kq, kq);
1003
1004             if(dates_with_new)
1005                 buffer_strcat(wb, "new ");
1006
1007             buffer_jsdate(wb, tm->tm_year + 1900, tm->tm_mon, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec);
1008
1009             buffer_strcat(wb, post_date);
1010
1011             if(row_annotations) {
1012                 // google supports one annotation per row
1013                 int annotation_found = 0;
1014                 for(c = 0, rd = r->st->dimensions; rd ;c++, rd = rd->next) {
1015                     if(co[c] & RRDR_RESET) {
1016                         buffer_strcat(wb, overflow_annotation);
1017                         annotation_found = 1;
1018                         break;
1019                     }
1020                 }
1021                 if(!annotation_found)
1022                     buffer_strcat(wb, normal_annotation);
1023             }
1024         }
1025         else {
1026             // print the timestamp of the line
1027             if(likely(i != start)) buffer_strcat(wb, ",\n");
1028             buffer_strcat(wb, pre_date);
1029
1030             if( options & RRDR_OPTION_OBJECTSROWS )
1031                 buffer_sprintf(wb, "%stime%s: ", kq, kq);
1032
1033             buffer_rrd_value(wb, (calculated_number)r->t[i]);
1034             // in ms
1035             if(options & RRDR_OPTION_MILLISECONDS) buffer_strcat(wb, "000");
1036
1037             buffer_strcat(wb, post_date);
1038         }
1039
1040         if(unlikely(options & RRDR_OPTION_PERCENTAGE)) {
1041             total = 0;
1042             for(c = 0, rd = r->st->dimensions; rd && c < r->d ;c++, rd = rd->next) {
1043                 calculated_number n = cn[c];
1044
1045                 if(likely((options & RRDR_OPTION_ABSOLUTE) && n < 0))
1046                     n = -n;
1047
1048                 total += n;
1049             }
1050             // prevent a division by zero
1051             if(total == 0) total = 1;
1052         }
1053
1054         // for each dimension
1055         for(c = 0, rd = r->st->dimensions; rd && c < r->d ;c++, rd = rd->next) {
1056             if(unlikely(r->od[c] & RRDR_HIDDEN)) continue;
1057             if(unlikely((options & RRDR_OPTION_NONZERO) && !(r->od[c] & RRDR_NONZERO))) continue;
1058
1059             calculated_number n = cn[c];
1060
1061             buffer_strcat(wb, pre_value);
1062
1063             if( options & RRDR_OPTION_OBJECTSROWS )
1064                 buffer_sprintf(wb, "%s%s%s: ", kq, rd->name, kq);
1065
1066             if(co[c] & RRDR_EMPTY) {
1067                 if(options & RRDR_OPTION_NULL2ZERO)
1068                     buffer_strcat(wb, "0");
1069                 else
1070                     buffer_strcat(wb, "null");
1071             }
1072             else {
1073                 if(unlikely((options & RRDR_OPTION_ABSOLUTE) && n < 0))
1074                     n = -n;
1075
1076                 if(unlikely(options & RRDR_OPTION_PERCENTAGE))
1077                     n = n * 100 / total;
1078
1079                 buffer_rrd_value(wb, n);
1080             }
1081
1082             buffer_strcat(wb, post_value);
1083         }
1084
1085         buffer_strcat(wb, post_line);
1086     }
1087
1088     buffer_strcat(wb, finish);
1089     //info("RRD2JSON(): %s: END", r->st->id);
1090 }
1091
1092 static void rrdr2csv(RRDR *r, BUFFER *wb, uint32_t options, const char *startline, const char *separator, const char *endline, const char *betweenlines)
1093 {
1094     //info("RRD2CSV(): %s: BEGIN", r->st->id);
1095     long c, i;
1096     RRDDIM *d;
1097
1098     // print the csv header
1099     for(c = 0, i = 0, d = r->st->dimensions; d && c < r->d ;c++, d = d->next) {
1100         if(unlikely(r->od[c] & RRDR_HIDDEN)) continue;
1101         if(unlikely((options & RRDR_OPTION_NONZERO) && !(r->od[c] & RRDR_NONZERO))) continue;
1102
1103         if(!i) {
1104             buffer_strcat(wb, startline);
1105             if(options & RRDR_OPTION_LABEL_QUOTES) buffer_strcat(wb, "\"");
1106             buffer_strcat(wb, "time");
1107             if(options & RRDR_OPTION_LABEL_QUOTES) buffer_strcat(wb, "\"");
1108         }
1109         buffer_strcat(wb, separator);
1110         if(options & RRDR_OPTION_LABEL_QUOTES) buffer_strcat(wb, "\"");
1111         buffer_strcat(wb, d->name);
1112         if(options & RRDR_OPTION_LABEL_QUOTES) buffer_strcat(wb, "\"");
1113         i++;
1114     }
1115     buffer_strcat(wb, endline);
1116
1117     if(!i) {
1118         // no dimensions present
1119         return;
1120     }
1121
1122     long start = 0, end = rrdr_rows(r), step = 1;
1123     if((options & RRDR_OPTION_REVERSED)) {
1124         start = rrdr_rows(r) - 1;
1125         end = -1;
1126         step = -1;
1127     }
1128
1129     // for each line in the array
1130     calculated_number total = 1;
1131     for(i = start; i != end ;i += step) {
1132         calculated_number *cn = &r->v[ i * r->d ];
1133         uint8_t *co = &r->o[ i * r->d ];
1134
1135         buffer_strcat(wb, betweenlines);
1136         buffer_strcat(wb, startline);
1137
1138         time_t now = r->t[i];
1139
1140         if((options & RRDR_OPTION_SECONDS) || (options & RRDR_OPTION_MILLISECONDS)) {
1141             // print the timestamp of the line
1142             buffer_rrd_value(wb, (calculated_number)now);
1143             // in ms
1144             if(options & RRDR_OPTION_MILLISECONDS) buffer_strcat(wb, "000");
1145         }
1146         else {
1147             // generate the local date time
1148             struct tm tmbuf, *tm = localtime_r(&now, &tmbuf);
1149             if(!tm) { error("localtime() failed."); continue; }
1150             buffer_date(wb, tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec);
1151         }
1152
1153         if(unlikely(options & RRDR_OPTION_PERCENTAGE)) {
1154             total = 0;
1155             for(c = 0, d = r->st->dimensions; d && c < r->d ;c++, d = d->next) {
1156                 calculated_number n = cn[c];
1157
1158                 if(likely((options & RRDR_OPTION_ABSOLUTE) && n < 0))
1159                     n = -n;
1160
1161                 total += n;
1162             }
1163             // prevent a division by zero
1164             if(total == 0) total = 1;
1165         }
1166
1167         // for each dimension
1168         for(c = 0, d = r->st->dimensions; d && c < r->d ;c++, d = d->next) {
1169             if(unlikely(r->od[c] & RRDR_HIDDEN)) continue;
1170             if(unlikely((options & RRDR_OPTION_NONZERO) && !(r->od[c] & RRDR_NONZERO))) continue;
1171
1172             buffer_strcat(wb, separator);
1173
1174             calculated_number n = cn[c];
1175
1176             if(co[c] & RRDR_EMPTY) {
1177                 if(options & RRDR_OPTION_NULL2ZERO)
1178                     buffer_strcat(wb, "0");
1179                 else
1180                     buffer_strcat(wb, "null");
1181             }
1182             else {
1183                 if(unlikely((options & RRDR_OPTION_ABSOLUTE) && n < 0))
1184                     n = -n;
1185
1186                 if(unlikely(options & RRDR_OPTION_PERCENTAGE))
1187                     n = n * 100 / total;
1188
1189                 buffer_rrd_value(wb, n);
1190             }
1191         }
1192
1193         buffer_strcat(wb, endline);
1194     }
1195     //info("RRD2CSV(): %s: END", r->st->id);
1196 }
1197
1198 inline static calculated_number rrdr2value(RRDR *r, long i, uint32_t options, int *all_values_are_null) {
1199     long c;
1200     RRDDIM *d;
1201
1202     calculated_number *cn = &r->v[ i * r->d ];
1203     uint8_t *co = &r->o[ i * r->d ];
1204
1205     calculated_number sum = 0, min = 0, max = 0, v;
1206     int all_null = 1, init = 1;
1207
1208     calculated_number total = 1;
1209     if(unlikely(options & RRDR_OPTION_PERCENTAGE)) {
1210         total = 0;
1211         for(c = 0, d = r->st->dimensions; d && c < r->d ;c++, d = d->next) {
1212             calculated_number n = cn[c];
1213
1214             if(likely((options & RRDR_OPTION_ABSOLUTE) && n < 0))
1215                 n = -n;
1216
1217             total += n;
1218         }
1219         // prevent a division by zero
1220         if(total == 0) total = 1;
1221     }
1222
1223     // for each dimension
1224     for(c = 0, d = r->st->dimensions; d && c < r->d ;c++, d = d->next) {
1225         if(unlikely(r->od[c] & RRDR_HIDDEN)) continue;
1226         if(unlikely((options & RRDR_OPTION_NONZERO) && !(r->od[c] & RRDR_NONZERO))) continue;
1227
1228         calculated_number n = cn[c];
1229
1230         if(likely((options & RRDR_OPTION_ABSOLUTE) && n < 0))
1231             n = -n;
1232
1233         if(unlikely(options & RRDR_OPTION_PERCENTAGE))
1234             n = n * 100 / total;
1235
1236         if(unlikely(init)) {
1237             if(n > 0) {
1238                 min = 0;
1239                 max = n;
1240             }
1241             else {
1242                 min = n;
1243                 max = 0;
1244             }
1245             init = 0;
1246         }
1247
1248         if(likely(!(co[c] & RRDR_EMPTY))) {
1249             all_null = 0;
1250             sum += n;
1251         }
1252
1253         if(n < min) min = n;
1254         if(n > max) max = n;
1255     }
1256
1257     if(unlikely(all_null)) {
1258         if(likely(all_values_are_null))
1259             *all_values_are_null = 1;
1260         return 0;
1261     }
1262     else {
1263         if(likely(all_values_are_null))
1264             *all_values_are_null = 0;
1265     }
1266
1267     if(options & RRDR_OPTION_MIN2MAX)
1268         v = max - min;
1269     else
1270         v = sum;
1271
1272     return v;
1273 }
1274
1275 static void rrdr2ssv(RRDR *r, BUFFER *wb, uint32_t options, const char *prefix, const char *separator, const char *suffix)
1276 {
1277     //info("RRD2SSV(): %s: BEGIN", r->st->id);
1278     long i;
1279
1280     buffer_strcat(wb, prefix);
1281     long start = 0, end = rrdr_rows(r), step = 1;
1282     if((options & RRDR_OPTION_REVERSED)) {
1283         start = rrdr_rows(r) - 1;
1284         end = -1;
1285         step = -1;
1286     }
1287
1288     // for each line in the array
1289     for(i = start; i != end ;i += step) {
1290         int all_values_are_null = 0;
1291         calculated_number v = rrdr2value(r, i, options, &all_values_are_null);
1292
1293         if(likely(i != start)) {
1294             if(r->min > v) r->min = v;
1295             if(r->max < v) r->max = v;
1296         }
1297         else {
1298             r->min = v;
1299             r->max = v;
1300         }
1301
1302         if(likely(i != start))
1303             buffer_strcat(wb, separator);
1304
1305         if(all_values_are_null) {
1306             if(options & RRDR_OPTION_NULL2ZERO)
1307                 buffer_strcat(wb, "0");
1308             else
1309                 buffer_strcat(wb, "null");
1310         }
1311         else
1312             buffer_rrd_value(wb, v);
1313     }
1314     buffer_strcat(wb, suffix);
1315     //info("RRD2SSV(): %s: END", r->st->id);
1316 }
1317
1318 inline static calculated_number *rrdr_line_values(RRDR *r)
1319 {
1320     return &r->v[ r->c * r->d ];
1321 }
1322
1323 inline static uint8_t *rrdr_line_options(RRDR *r)
1324 {
1325     return &r->o[ r->c * r->d ];
1326 }
1327
1328 inline static int rrdr_line_init(RRDR *r, time_t t)
1329 {
1330     r->c++;
1331
1332     if(unlikely(r->c >= r->n)) {
1333         error("requested to step above RRDR size for chart %s", r->st->name);
1334         r->c = r->n - 1;
1335     }
1336
1337     // save the time
1338     r->t[r->c] = t;
1339
1340     return 1;
1341 }
1342
1343 inline static void rrdr_lock_rrdset(RRDR *r) {
1344     if(unlikely(!r)) {
1345         error("NULL value given!");
1346         return;
1347     }
1348
1349     rrdset_rdlock(r->st);
1350     r->has_st_lock = 1;
1351 }
1352
1353 inline static void rrdr_unlock_rrdset(RRDR *r) {
1354     if(unlikely(!r)) {
1355         error("NULL value given!");
1356         return;
1357     }
1358
1359     if(likely(r->has_st_lock)) {
1360         rrdset_unlock(r->st);
1361         r->has_st_lock = 0;
1362     }
1363 }
1364
1365 inline static void rrdr_free(RRDR *r)
1366 {
1367     if(unlikely(!r)) {
1368         error("NULL value given!");
1369         return;
1370     }
1371
1372     rrdr_unlock_rrdset(r);
1373     freez(r->t);
1374     freez(r->v);
1375     freez(r->o);
1376     freez(r->od);
1377     freez(r);
1378 }
1379
1380 static inline void rrdr_done(RRDR *r)
1381 {
1382     r->rows = r->c + 1;
1383     r->c = 0;
1384 }
1385
1386 static RRDR *rrdr_create(RRDSET *st, long n)
1387 {
1388     if(unlikely(!st)) {
1389         error("NULL value given!");
1390         return NULL;
1391     }
1392
1393     RRDR *r = callocz(1, sizeof(RRDR));
1394     r->st = st;
1395
1396     rrdr_lock_rrdset(r);
1397
1398     RRDDIM *rd;
1399     for(rd = st->dimensions ; rd ; rd = rd->next) r->d++;
1400
1401     r->n = n;
1402
1403     r->t = mallocz(n * sizeof(time_t));
1404     r->v = mallocz(n * r->d * sizeof(calculated_number));
1405     r->o = mallocz(n * r->d * sizeof(uint8_t));
1406     r->od = mallocz(r->d * sizeof(uint8_t));
1407
1408     // set the hidden flag on hidden dimensions
1409     int c;
1410     for(c = 0, rd = st->dimensions ; rd ; c++, rd = rd->next) {
1411         if(unlikely(rrddim_flag_check(rd, RRDDIM_FLAG_HIDDEN)))
1412             r->od[c] = RRDR_HIDDEN;
1413         else
1414             r->od[c] = 0;
1415     }
1416
1417     r->c = -1;
1418     r->group = 1;
1419     r->update_every = 1;
1420
1421     return r;
1422 }
1423
1424 RRDR *rrd2rrdr(RRDSET *st, long points, long long after, long long before, int group_method, int aligned)
1425 {
1426     int debug = rrdset_flag_check(st, RRDSET_FLAG_DEBUG)?1:0;
1427     int absolute_period_requested = -1;
1428
1429     time_t first_entry_t = rrdset_first_entry_t(st);
1430     time_t last_entry_t  = rrdset_last_entry_t(st);
1431
1432     if(before == 0 && after == 0) {
1433         // dump the all the data
1434         before = last_entry_t;
1435         after = first_entry_t;
1436         absolute_period_requested = 0;
1437     }
1438
1439     // allow relative for before (smaller than API_RELATIVE_TIME_MAX)
1440     if(((before < 0)?-before:before) <= API_RELATIVE_TIME_MAX) {
1441         if(abs(before) % st->update_every) {
1442             // make sure it is multiple of st->update_every
1443             if(before < 0) before = before - st->update_every - before % st->update_every;
1444             else           before = before + st->update_every - before % st->update_every;
1445         }
1446         if(before > 0) before = first_entry_t + before;
1447         else           before = last_entry_t  + before;
1448         absolute_period_requested = 0;
1449     }
1450
1451     // allow relative for after (smaller than API_RELATIVE_TIME_MAX)
1452     if(((after < 0)?-after:after) <= API_RELATIVE_TIME_MAX) {
1453         if(after == 0) after = -st->update_every;
1454         if(abs(after) % st->update_every) {
1455             // make sure it is multiple of st->update_every
1456             if(after < 0) after = after - st->update_every - after % st->update_every;
1457             else          after = after + st->update_every - after % st->update_every;
1458         }
1459         after = before + after;
1460         absolute_period_requested = 0;
1461     }
1462
1463     if(absolute_period_requested == -1)
1464         absolute_period_requested = 1;
1465
1466     // make sure they are within our timeframe
1467     if(before > last_entry_t)  before = last_entry_t;
1468     if(before < first_entry_t) before = first_entry_t;
1469
1470     if(after > last_entry_t)  after = last_entry_t;
1471     if(after < first_entry_t) after = first_entry_t;
1472
1473     // check if they are upside down
1474     if(after > before) {
1475         time_t tmp = before;
1476         before = after;
1477         after = tmp;
1478     }
1479
1480     // the duration of the chart
1481     time_t duration = before - after;
1482     long available_points = duration / st->update_every;
1483
1484     if(duration <= 0 || available_points <= 0)
1485         return rrdr_create(st, 1);
1486
1487     // check the wanted points
1488     if(points < 0) points = -points;
1489     if(points > available_points) points = available_points;
1490     if(points == 0) points = available_points;
1491
1492     // calculate proper grouping of source data
1493     long group = available_points / points;
1494     if(group <= 0) group = 1;
1495
1496     // round group to the closest integer
1497     if(available_points % points > points / 2) group++;
1498
1499     time_t after_new  = (aligned) ? (after  - (after  % (group * st->update_every))) : after;
1500     time_t before_new = (aligned) ? (before - (before % (group * st->update_every))) : before;
1501     long points_new   = (before_new - after_new) / st->update_every / group;
1502
1503     // find the starting and ending slots in our round robin db
1504     long    start_at_slot = rrdset_time2slot(st, before_new),
1505             stop_at_slot  = rrdset_time2slot(st, after_new);
1506
1507 #ifdef NETDATA_INTERNAL_CHECKS
1508     if(after_new < first_entry_t) {
1509         error("after_new %u is too small, minimum %u", (uint32_t)after_new, (uint32_t)first_entry_t);
1510     }
1511     if(after_new > last_entry_t) {
1512         error("after_new %u is too big, maximum %u", (uint32_t)after_new, (uint32_t)last_entry_t);
1513     }
1514     if(before_new < first_entry_t) {
1515         error("before_new %u is too small, minimum %u", (uint32_t)before_new, (uint32_t)first_entry_t);
1516     }
1517     if(before_new > last_entry_t) {
1518         error("before_new %u is too big, maximum %u", (uint32_t)before_new, (uint32_t)last_entry_t);
1519     }
1520     if(start_at_slot < 0 || start_at_slot >= st->entries) {
1521         error("start_at_slot is invalid %ld, expected 0 to %ld", start_at_slot, st->entries - 1);
1522     }
1523     if(stop_at_slot < 0 || stop_at_slot >= st->entries) {
1524         error("stop_at_slot is invalid %ld, expected 0 to %ld", stop_at_slot, st->entries - 1);
1525     }
1526     if(points_new > (before_new - after_new) / group / st->update_every + 1) {
1527         error("points_new %ld is more than points %ld", points_new, (before_new - after_new) / group / st->update_every + 1);
1528     }
1529 #endif
1530
1531     //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);
1532
1533     after = after_new;
1534     before = before_new;
1535     duration = before - after;
1536     points = points_new;
1537
1538     // Now we have:
1539     // before = the end time of the calculation
1540     // after = the start time of the calculation
1541     // duration = the duration of the calculation
1542     // group = the number of source points to aggregate / group together
1543     // method = the method of grouping source points
1544     // points = the number of points to generate
1545
1546
1547     // -------------------------------------------------------------------------
1548     // initialize our result set
1549
1550     RRDR *r = rrdr_create(st, points);
1551     if(!r) {
1552 #ifdef NETDATA_INTERNAL_CHECKS
1553         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);
1554 #endif
1555         return NULL;
1556     }
1557     if(!r->d) {
1558 #ifdef NETDATA_INTERNAL_CHECKS
1559         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);
1560 #endif
1561         return r;
1562     }
1563
1564     if(absolute_period_requested == 1)
1565         r->result_options |= RRDR_RESULT_OPTION_ABSOLUTE;
1566     else
1567         r->result_options |= RRDR_RESULT_OPTION_RELATIVE;
1568
1569     // find how many dimensions we have
1570     long dimensions = r->d;
1571
1572
1573     // -------------------------------------------------------------------------
1574     // checks for debugging
1575
1576     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"
1577             , st->id
1578             , (uint32_t)first_entry_t
1579             , (uint32_t)last_entry_t
1580             , (uint32_t)(last_entry_t - first_entry_t)
1581             , (uint32_t)after
1582             , (uint32_t)before
1583             , (uint32_t)duration
1584             , points
1585             , group
1586             );
1587
1588
1589     // -------------------------------------------------------------------------
1590     // temp arrays for keeping values per dimension
1591
1592     calculated_number   last_values[dimensions]; // keep the last value of each dimension
1593     calculated_number   group_values[dimensions]; // keep sums when grouping
1594     long                group_counts[dimensions]; // keep the number of values added to group_values
1595     uint8_t             group_options[dimensions];
1596     uint8_t             found_non_zero[dimensions];
1597
1598
1599     // initialize them
1600     RRDDIM *rd;
1601     long c;
1602     for( rd = st->dimensions, c = 0 ; rd && c < dimensions ; rd = rd->next, c++) {
1603         last_values[c] = 0;
1604         group_values[c] = (group_method == GROUP_MAX || group_method == GROUP_MIN)?NAN:0;
1605         group_counts[c] = 0;
1606         group_options[c] = 0;
1607         found_non_zero[c] = 0;
1608     }
1609
1610
1611     // -------------------------------------------------------------------------
1612     // the main loop
1613
1614     time_t  now = rrdset_slot2time(st, start_at_slot),
1615             dt = st->update_every,
1616             group_start_t = 0;
1617
1618     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"
1619             , st->id
1620             , (uint32_t)after
1621             , stop_at_slot
1622             , (uint32_t)before
1623             , start_at_slot
1624             , (uint32_t)now
1625             , st->current_entry
1626             , st->entries
1627             );
1628
1629     r->group = group;
1630     r->update_every = group * st->update_every;
1631     r->before = now;
1632     r->after = now;
1633
1634     //info("RRD2RRDR(): %s: STARTING", st->id);
1635
1636     long slot = start_at_slot, counter = 0, stop_now = 0, added = 0, group_count = 0, add_this = 0;
1637     for(; !stop_now ; now -= dt, slot--, counter++) {
1638         if(unlikely(slot < 0)) slot = st->entries - 1;
1639         if(unlikely(slot == stop_at_slot)) stop_now = counter;
1640
1641         if(unlikely(debug)) debug(D_RRD_STATS, "ROW %s slot: %ld, entries_counter: %ld, group_count: %ld, added: %ld, now: %ld, %s %s"
1642                 , st->id
1643                 , slot
1644                 , counter
1645                 , group_count + 1
1646                 , added
1647                 , now
1648                 , (group_count + 1 == group)?"PRINT":"  -  "
1649                 , (now >= after && now <= before)?"RANGE":"  -  "
1650                 );
1651
1652         // make sure we return data in the proper time range
1653         if(unlikely(now > before)) continue;
1654         if(unlikely(now < after)) break;
1655
1656         if(unlikely(group_count == 0)) {
1657             group_start_t = now;
1658         }
1659         group_count++;
1660
1661         if(unlikely(group_count == group)) {
1662             if(unlikely(added >= points)) break;
1663             add_this = 1;
1664         }
1665
1666         // do the calculations
1667         for(rd = st->dimensions, c = 0 ; rd && c < dimensions ; rd = rd->next, c++) {
1668             storage_number n = rd->values[slot];
1669             if(unlikely(!does_storage_number_exist(n))) continue;
1670
1671             group_counts[c]++;
1672
1673             calculated_number value = unpack_storage_number(n);
1674             if(likely(value != 0.0)) {
1675                 group_options[c] |= RRDR_NONZERO;
1676                 found_non_zero[c] = 1;
1677             }
1678
1679             if(unlikely(did_storage_number_reset(n)))
1680                 group_options[c] |= RRDR_RESET;
1681
1682             switch(group_method) {
1683                 case GROUP_MIN:
1684                     if(unlikely(isnan(group_values[c])) ||
1685                             fabsl(value) < fabsl(group_values[c]))
1686                         group_values[c] = value;
1687                     break;
1688
1689                 case GROUP_MAX:
1690                     if(unlikely(isnan(group_values[c])) ||
1691                             fabsl(value) > fabsl(group_values[c]))
1692                         group_values[c] = value;
1693                     break;
1694
1695                 default:
1696                 case GROUP_SUM:
1697                 case GROUP_AVERAGE:
1698                 case GROUP_UNDEFINED:
1699                     group_values[c] += value;
1700                     break;
1701
1702                 case GROUP_INCREMENTAL_SUM:
1703                     if(unlikely(slot == start_at_slot))
1704                         last_values[c] = value;
1705
1706                     group_values[c] += last_values[c] - value;
1707                     last_values[c] = value;
1708                     break;
1709             }
1710         }
1711
1712         // added it
1713         if(unlikely(add_this)) {
1714             if(unlikely(!rrdr_line_init(r, group_start_t))) break;
1715
1716             r->after = now;
1717
1718             calculated_number *cn = rrdr_line_values(r);
1719             uint8_t *co = rrdr_line_options(r);
1720
1721             for(rd = st->dimensions, c = 0 ; rd && c < dimensions ; rd = rd->next, c++) {
1722
1723                 // update the dimension options
1724                 if(likely(found_non_zero[c])) r->od[c] |= RRDR_NONZERO;
1725
1726                 // store the specific point options
1727                 co[c] = group_options[c];
1728
1729                 // store the value
1730                 if(unlikely(group_counts[c] == 0)) {
1731                     cn[c] = 0.0;
1732                     co[c] |= RRDR_EMPTY;
1733                     group_values[c] = (group_method == GROUP_MAX || group_method == GROUP_MIN)?NAN:0;
1734                 }
1735                 else {
1736                     switch(group_method) {
1737                         case GROUP_MIN:
1738                         case GROUP_MAX:
1739                             if(unlikely(isnan(group_values[c])))
1740                                 cn[c] = 0;
1741                             else {
1742                                 cn[c] = group_values[c];
1743                                 group_values[c] = NAN;
1744                             }
1745                             break;
1746
1747                         case GROUP_SUM:
1748                         case GROUP_INCREMENTAL_SUM:
1749                             cn[c] = group_values[c];
1750                             group_values[c] = 0;
1751                             break;
1752
1753                         default:
1754                         case GROUP_AVERAGE:
1755                         case GROUP_UNDEFINED:
1756                             cn[c] = group_values[c] / group_counts[c];
1757                             group_values[c] = 0;
1758                             break;
1759                     }
1760
1761                     if(cn[c] < r->min) r->min = cn[c];
1762                     if(cn[c] > r->max) r->max = cn[c];
1763                 }
1764
1765                 // reset for the next loop
1766                 group_counts[c] = 0;
1767                 group_options[c] = 0;
1768             }
1769
1770             added++;
1771             group_count = 0;
1772             add_this = 0;
1773         }
1774     }
1775
1776     rrdr_done(r);
1777     //info("RRD2RRDR(): %s: END %ld loops made, %ld points generated", st->id, counter, rrdr_rows(r));
1778     //error("SHIFT: %s: wanted %ld points, got %ld", st->id, points, rrdr_rows(r));
1779     return r;
1780 }
1781
1782 int rrd2value(RRDSET *st, BUFFER *wb, calculated_number *n, const char *dimensions, long points, long long after, long long before, int group_method, uint32_t options, time_t *db_after, time_t *db_before, int *value_is_null)
1783 {
1784     RRDR *r = rrd2rrdr(st, points, after, before, group_method, !(options & RRDR_OPTION_NOT_ALIGNED));
1785     if(!r) {
1786         if(value_is_null) *value_is_null = 1;
1787         return 500;
1788     }
1789
1790     if(rrdr_rows(r) == 0) {
1791         rrdr_free(r);
1792
1793         if(db_after)  *db_after  = 0;
1794         if(db_before) *db_before = 0;
1795         if(value_is_null) *value_is_null = 1;
1796
1797         return 400;
1798     }
1799
1800     if(r->result_options & RRDR_RESULT_OPTION_RELATIVE)
1801         buffer_no_cacheable(wb);
1802     else if(r->result_options & RRDR_RESULT_OPTION_ABSOLUTE)
1803         buffer_cacheable(wb);
1804
1805     options = rrdr_check_options(r, options, dimensions);
1806
1807     if(dimensions)
1808         rrdr_disable_not_selected_dimensions(r, options, dimensions);
1809
1810     if(db_after)  *db_after  = r->after;
1811     if(db_before) *db_before = r->before;
1812
1813     long i = (options & RRDR_OPTION_REVERSED)?rrdr_rows(r) - 1:0;
1814     *n = rrdr2value(r, i, options, value_is_null);
1815
1816     rrdr_free(r);
1817     return 200;
1818 }
1819
1820 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)
1821 {
1822     RRDR *r = rrd2rrdr(st, points, after, before, group_method, !(options & RRDR_OPTION_NOT_ALIGNED));
1823     if(!r) {
1824         buffer_strcat(wb, "Cannot generate output with these parameters on this chart.");
1825         return 500;
1826     }
1827
1828     if(r->result_options & RRDR_RESULT_OPTION_RELATIVE)
1829         buffer_no_cacheable(wb);
1830     else if(r->result_options & RRDR_RESULT_OPTION_ABSOLUTE)
1831         buffer_cacheable(wb);
1832
1833     options = rrdr_check_options(r, options, (dimensions)?buffer_tostring(dimensions):NULL);
1834
1835     if(dimensions)
1836         rrdr_disable_not_selected_dimensions(r, options, buffer_tostring(dimensions));
1837
1838     if(latest_timestamp && rrdr_rows(r) > 0)
1839         *latest_timestamp = r->before;
1840
1841     switch(format) {
1842     case DATASOURCE_SSV:
1843         if(options & RRDR_OPTION_JSON_WRAP) {
1844             wb->contenttype = CT_APPLICATION_JSON;
1845             rrdr_json_wrapper_begin(r, wb, format, options, 1);
1846             rrdr2ssv(r, wb, options, "", " ", "");
1847             rrdr_json_wrapper_end(r, wb, format, options, 1);
1848         }
1849         else {
1850             wb->contenttype = CT_TEXT_PLAIN;
1851             rrdr2ssv(r, wb, options, "", " ", "");
1852         }
1853         break;
1854
1855     case DATASOURCE_SSV_COMMA:
1856         if(options & RRDR_OPTION_JSON_WRAP) {
1857             wb->contenttype = CT_APPLICATION_JSON;
1858             rrdr_json_wrapper_begin(r, wb, format, options, 1);
1859             rrdr2ssv(r, wb, options, "", ",", "");
1860             rrdr_json_wrapper_end(r, wb, format, options, 1);
1861         }
1862         else {
1863             wb->contenttype = CT_TEXT_PLAIN;
1864             rrdr2ssv(r, wb, options, "", ",", "");
1865         }
1866         break;
1867
1868     case DATASOURCE_JS_ARRAY:
1869         if(options & RRDR_OPTION_JSON_WRAP) {
1870             wb->contenttype = CT_APPLICATION_JSON;
1871             rrdr_json_wrapper_begin(r, wb, format, options, 0);
1872             rrdr2ssv(r, wb, options, "[", ",", "]");
1873             rrdr_json_wrapper_end(r, wb, format, options, 0);
1874         }
1875         else {
1876             wb->contenttype = CT_APPLICATION_JSON;
1877             rrdr2ssv(r, wb, options, "[", ",", "]");
1878         }
1879         break;
1880
1881     case DATASOURCE_CSV:
1882         if(options & RRDR_OPTION_JSON_WRAP) {
1883             wb->contenttype = CT_APPLICATION_JSON;
1884             rrdr_json_wrapper_begin(r, wb, format, options, 1);
1885             rrdr2csv(r, wb, options, "", ",", "\\n", "");
1886             rrdr_json_wrapper_end(r, wb, format, options, 1);
1887         }
1888         else {
1889             wb->contenttype = CT_TEXT_PLAIN;
1890             rrdr2csv(r, wb, options, "", ",", "\r\n", "");
1891         }
1892         break;
1893
1894     case DATASOURCE_CSV_JSON_ARRAY:
1895         wb->contenttype = CT_APPLICATION_JSON;
1896         if(options & RRDR_OPTION_JSON_WRAP) {
1897             rrdr_json_wrapper_begin(r, wb, format, options, 0);
1898             buffer_strcat(wb, "[\n");
1899             rrdr2csv(r, wb, options + RRDR_OPTION_LABEL_QUOTES, "[", ",", "]", ",\n");
1900             buffer_strcat(wb, "\n]");
1901             rrdr_json_wrapper_end(r, wb, format, options, 0);
1902         }
1903         else {
1904             wb->contenttype = CT_TEXT_PLAIN;
1905             buffer_strcat(wb, "[\n");
1906             rrdr2csv(r, wb, options + RRDR_OPTION_LABEL_QUOTES, "[", ",", "]", ",\n");
1907             buffer_strcat(wb, "\n]");
1908         }
1909         break;
1910
1911     case DATASOURCE_TSV:
1912         if(options & RRDR_OPTION_JSON_WRAP) {
1913             wb->contenttype = CT_APPLICATION_JSON;
1914             rrdr_json_wrapper_begin(r, wb, format, options, 1);
1915             rrdr2csv(r, wb, options, "", "\t", "\\n", "");
1916             rrdr_json_wrapper_end(r, wb, format, options, 1);
1917         }
1918         else {
1919             wb->contenttype = CT_TEXT_PLAIN;
1920             rrdr2csv(r, wb, options, "", "\t", "\r\n", "");
1921         }
1922         break;
1923
1924     case DATASOURCE_HTML:
1925         if(options & RRDR_OPTION_JSON_WRAP) {
1926             wb->contenttype = CT_APPLICATION_JSON;
1927             rrdr_json_wrapper_begin(r, wb, format, options, 1);
1928             buffer_strcat(wb, "<html>\\n<center>\\n<table border=\\\"0\\\" cellpadding=\\\"5\\\" cellspacing=\\\"5\\\">\\n");
1929             rrdr2csv(r, wb, options, "<tr><td>", "</td><td>", "</td></tr>\\n", "");
1930             buffer_strcat(wb, "</table>\\n</center>\\n</html>\\n");
1931             rrdr_json_wrapper_end(r, wb, format, options, 1);
1932         }
1933         else {
1934             wb->contenttype = CT_TEXT_HTML;
1935             buffer_strcat(wb, "<html>\n<center>\n<table border=\"0\" cellpadding=\"5\" cellspacing=\"5\">\n");
1936             rrdr2csv(r, wb, options, "<tr><td>", "</td><td>", "</td></tr>\n", "");
1937             buffer_strcat(wb, "</table>\n</center>\n</html>\n");
1938         }
1939         break;
1940
1941     case DATASOURCE_DATATABLE_JSONP:
1942         wb->contenttype = CT_APPLICATION_X_JAVASCRIPT;
1943
1944         if(options & RRDR_OPTION_JSON_WRAP)
1945             rrdr_json_wrapper_begin(r, wb, format, options, 0);
1946
1947         rrdr2json(r, wb, options, 1);
1948
1949         if(options & RRDR_OPTION_JSON_WRAP)
1950             rrdr_json_wrapper_end(r, wb, format, options, 0);
1951         break;
1952
1953     case DATASOURCE_DATATABLE_JSON:
1954         wb->contenttype = CT_APPLICATION_JSON;
1955
1956         if(options & RRDR_OPTION_JSON_WRAP)
1957             rrdr_json_wrapper_begin(r, wb, format, options, 0);
1958
1959         rrdr2json(r, wb, options, 1);
1960
1961         if(options & RRDR_OPTION_JSON_WRAP)
1962             rrdr_json_wrapper_end(r, wb, format, options, 0);
1963         break;
1964
1965     case DATASOURCE_JSONP:
1966         wb->contenttype = CT_APPLICATION_X_JAVASCRIPT;
1967         if(options & RRDR_OPTION_JSON_WRAP)
1968             rrdr_json_wrapper_begin(r, wb, format, options, 0);
1969
1970         rrdr2json(r, wb, options, 0);
1971
1972         if(options & RRDR_OPTION_JSON_WRAP)
1973             rrdr_json_wrapper_end(r, wb, format, options, 0);
1974         break;
1975
1976     case DATASOURCE_JSON:
1977     default:
1978         wb->contenttype = CT_APPLICATION_JSON;
1979
1980         if(options & RRDR_OPTION_JSON_WRAP)
1981             rrdr_json_wrapper_begin(r, wb, format, options, 0);
1982
1983         rrdr2json(r, wb, options, 0);
1984
1985         if(options & RRDR_OPTION_JSON_WRAP)
1986             rrdr_json_wrapper_end(r, wb, format, options, 0);
1987         break;
1988     }
1989
1990     rrdr_free(r);
1991     return 200;
1992 }
1993
1994 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)
1995 {
1996     int c;
1997     rrdset_rdlock(st);
1998
1999
2000     // -------------------------------------------------------------------------
2001     // switch from JSON to google JSON
2002
2003     char kq[2] = "\"";
2004     char sq[2] = "\"";
2005     switch(type) {
2006         case DATASOURCE_DATATABLE_JSON:
2007         case DATASOURCE_DATATABLE_JSONP:
2008             kq[0] = '\0';
2009             sq[0] = '\'';
2010             break;
2011
2012         case DATASOURCE_JSON:
2013         default:
2014             break;
2015     }
2016
2017
2018     // -------------------------------------------------------------------------
2019     // validate the parameters
2020
2021     if(points < 1) points = 1;
2022     if(group < 1) group = 1;
2023
2024     if(before == 0 || before > rrdset_last_entry_t(st)) before = rrdset_last_entry_t(st);
2025     if(after  == 0 || after < rrdset_first_entry_t(st)) after = rrdset_first_entry_t(st);
2026
2027     // ---
2028
2029     // our return value (the last timestamp printed)
2030     // this is required to detect re-transmit in google JSONP
2031     time_t last_timestamp = 0;
2032
2033
2034     // -------------------------------------------------------------------------
2035     // find how many dimensions we have
2036
2037     int dimensions = 0;
2038     RRDDIM *rd;
2039     for( rd = st->dimensions ; rd ; rd = rd->next) dimensions++;
2040     if(!dimensions) {
2041         rrdset_unlock(st);
2042         buffer_strcat(wb, "No dimensions yet.");
2043         return 0;
2044     }
2045
2046
2047     // -------------------------------------------------------------------------
2048     // prepare various strings, to speed up the loop
2049
2050     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);
2051     char normal_annotation[201];   snprintfz(normal_annotation,   200, ",{%sv%s:null},{%sv%s:null}", kq, kq, kq, kq);
2052     char pre_date[51];             snprintfz(pre_date,             50, "        {%sc%s:[{%sv%s:%s", kq, kq, kq, kq, sq);
2053     char post_date[21];            snprintfz(post_date,            20, "%s}", sq);
2054     char pre_value[21];            snprintfz(pre_value,            20, ",{%sv%s:", kq, kq);
2055     char post_value[21];           strcpy(post_value,                  "}");
2056
2057
2058     // -------------------------------------------------------------------------
2059     // checks for debugging
2060
2061     if(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)) {
2062         debug(D_RRD_STATS, "%s first_entry_t = %ld, last_entry_t = %ld, duration = %ld, after = %ld, before = %ld, duration = %ld, entries_to_show = %ld, group = %ld"
2063             , st->id
2064             , rrdset_first_entry_t(st)
2065             , rrdset_last_entry_t(st)
2066             , rrdset_last_entry_t(st) - rrdset_first_entry_t(st)
2067             , after
2068             , before
2069             , before - after
2070             , points
2071             , group
2072             );
2073
2074         if(before < after)
2075             debug(D_RRD_STATS, "WARNING: %s The newest value in the database (%ld) is earlier than the oldest (%ld)", st->name, before, after);
2076
2077         if((before - after) > st->entries * st->update_every)
2078             debug(D_RRD_STATS, "WARNING: %s The time difference between the oldest and the newest entries (%ld) is higher than the capacity of the database (%ld)", st->name, before - after, st->entries * st->update_every);
2079     }
2080
2081
2082     // -------------------------------------------------------------------------
2083     // temp arrays for keeping values per dimension
2084
2085     calculated_number group_values[dimensions]; // keep sums when grouping
2086     int               print_hidden[dimensions]; // keep hidden flags
2087     int               found_non_zero[dimensions];
2088     int               found_non_existing[dimensions];
2089
2090     // initialize them
2091     for( rd = st->dimensions, c = 0 ; rd && c < dimensions ; rd = rd->next, c++) {
2092         group_values[c] = 0;
2093         print_hidden[c] = rrddim_flag_check(rd, RRDDIM_FLAG_HIDDEN)?1:0;
2094         found_non_zero[c] = 0;
2095         found_non_existing[c] = 0;
2096     }
2097
2098
2099     // 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);
2100     // rrd2array(st, entries_to_show, before - (st->update_every * group * entries_to_show), before, group_method, only_non_zero);
2101     // rrd2rrdr(st, entries_to_show, before - (st->update_every * group * entries_to_show), before, group_method);
2102
2103     // -------------------------------------------------------------------------
2104     // remove dimensions that contain only zeros
2105
2106     int max_loop = 1;
2107     if(only_non_zero) max_loop = 2;
2108
2109     for(; max_loop ; max_loop--) {
2110
2111         // -------------------------------------------------------------------------
2112         // print the JSON header
2113
2114         buffer_sprintf(wb, "{\n %scols%s:\n [\n", kq, kq);
2115         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);
2116         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);
2117         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);
2118
2119         // print the header for each dimension
2120         // and update the print_hidden array for the dimensions that should be hidden
2121         int pc = 0;
2122         for( rd = st->dimensions, c = 0 ; rd && c < dimensions ; rd = rd->next, c++) {
2123             if(!print_hidden[c]) {
2124                 pc++;
2125                 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);
2126             }
2127         }
2128         if(!pc) {
2129             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);
2130         }
2131
2132         // print the begin of row data
2133         buffer_sprintf(wb, "\n  ],\n    %srows%s:\n [\n", kq, kq);
2134
2135
2136         // -------------------------------------------------------------------------
2137         // the main loop
2138
2139         int annotate_reset = 0;
2140         int annotation_count = 0;
2141
2142         long    t = rrdset_time2slot(st, before),
2143                 stop_at_t = rrdset_time2slot(st, after),
2144                 stop_now = 0;
2145
2146         t -= t % group;
2147
2148         time_t  now = rrdset_slot2time(st, t),
2149                 dt = st->update_every;
2150
2151         long count = 0, printed = 0, group_count = 0;
2152         last_timestamp = 0;
2153
2154         if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
2155             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"
2156                     , st->id
2157                     , (uint32_t)after
2158                     , (uint32_t)before
2159                     , points
2160                     , group
2161                     , st->current_entry
2162                     , (uint32_t)rrdset_first_entry_t(st)
2163                     , (uint32_t)rrdset_last_entry_t(st)
2164                     , t
2165                     , stop_at_t
2166                     );
2167
2168         long counter = 0;
2169         for(; !stop_now ; now -= dt, t--, counter++) {
2170             if(t < 0) t = st->entries - 1;
2171             if(t == stop_at_t) stop_now = counter;
2172
2173             int print_this = 0;
2174
2175             if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
2176                 debug(D_RRD_STATS, "%s t = %ld, count = %ld, group_count = %ld, printed = %ld, now = %ld, %s %s"
2177                     , st->id
2178                     , t
2179                     , count + 1
2180                     , group_count + 1
2181                     , printed
2182                     , now
2183                     , (group_count + 1 == group)?"PRINT":"  -  "
2184                     , (now >= after && now <= before)?"RANGE":"  -  "
2185                     );
2186
2187
2188             // make sure we return data in the proper time range
2189             if(now > before) continue;
2190             if(now < after) break;
2191
2192             //if(rrdset_slot2time(st, t) != now)
2193             //  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));
2194
2195             count++;
2196             group_count++;
2197
2198             // check if we have to print this now
2199             if(group_count == group) {
2200                 if(printed >= points) {
2201                     // debug(D_RRD_STATS, "Already printed all rows. Stopping.");
2202                     break;
2203                 }
2204
2205                 // generate the local date time
2206                 struct tm tmbuf, *tm = localtime_r(&now, &tmbuf);
2207                 if(!tm) { error("localtime() failed."); continue; }
2208                 if(now > last_timestamp) last_timestamp = now;
2209
2210                 if(printed) buffer_strcat(wb, "]},\n");
2211                 buffer_strcat(wb, pre_date);
2212                 buffer_jsdate(wb, tm->tm_year + 1900, tm->tm_mon, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec);
2213                 buffer_strcat(wb, post_date);
2214
2215                 print_this = 1;
2216             }
2217
2218             // do the calculations
2219             for(rd = st->dimensions, c = 0 ; rd && c < dimensions ; rd = rd->next, c++) {
2220                 storage_number n = rd->values[t];
2221                 calculated_number value = unpack_storage_number(n);
2222
2223                 if(!does_storage_number_exist(n)) {
2224                     value = 0.0;
2225                     found_non_existing[c]++;
2226                 }
2227                 if(did_storage_number_reset(n)) annotate_reset = 1;
2228
2229                 switch(group_method) {
2230                     case GROUP_MAX:
2231                         if(abs(value) > abs(group_values[c])) group_values[c] = value;
2232                         break;
2233
2234                     case GROUP_SUM:
2235                         group_values[c] += value;
2236                         break;
2237
2238                     default:
2239                     case GROUP_AVERAGE:
2240                         group_values[c] += value;
2241                         if(print_this) group_values[c] /= ( group_count - found_non_existing[c] );
2242                         break;
2243                 }
2244             }
2245
2246             if(print_this) {
2247                 if(annotate_reset) {
2248                     annotation_count++;
2249                     buffer_strcat(wb, overflow_annotation);
2250                     annotate_reset = 0;
2251                 }
2252                 else
2253                     buffer_strcat(wb, normal_annotation);
2254
2255                 pc = 0;
2256                 for(c = 0 ; c < dimensions ; c++) {
2257                     if(found_non_existing[c] == group_count) {
2258                         // all entries are non-existing
2259                         pc++;
2260                         buffer_strcat(wb, pre_value);
2261                         buffer_strcat(wb, "null");
2262                         buffer_strcat(wb, post_value);
2263                     }
2264                     else if(!print_hidden[c]) {
2265                         pc++;
2266                         buffer_strcat(wb, pre_value);
2267                         buffer_rrd_value(wb, group_values[c]);
2268                         buffer_strcat(wb, post_value);
2269
2270                         if(group_values[c]) found_non_zero[c]++;
2271                     }
2272
2273                     // reset them for the next loop
2274                     group_values[c] = 0;
2275                     found_non_existing[c] = 0;
2276                 }
2277
2278                 // if all dimensions are hidden, print a null
2279                 if(!pc) {
2280                     buffer_strcat(wb, pre_value);
2281                     buffer_strcat(wb, "null");
2282                     buffer_strcat(wb, post_value);
2283                 }
2284
2285                 printed++;
2286                 group_count = 0;
2287             }
2288         }
2289
2290         if(printed) buffer_strcat(wb, "]}");
2291         buffer_strcat(wb, "\n   ]\n}\n");
2292
2293         if(only_non_zero && max_loop > 1) {
2294             int changed = 0;
2295             for(rd = st->dimensions, c = 0 ; rd && c < dimensions ; rd = rd->next, c++) {
2296                 group_values[c] = 0;
2297                 found_non_existing[c] = 0;
2298
2299                 if(!print_hidden[c] && !found_non_zero[c]) {
2300                     changed = 1;
2301                     print_hidden[c] = 1;
2302                 }
2303             }
2304
2305             if(changed) buffer_flush(wb);
2306             else break;
2307         }
2308         else break;
2309
2310     } // max_loop
2311
2312     debug(D_RRD_STATS, "RRD_STATS_JSON: %s total %zu bytes", st->name, wb->len);
2313
2314     rrdset_unlock(st);
2315     return last_timestamp;
2316 }