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1 // SPDX-License-Identifier: GPL-3.0-or-later
2
3 #ifndef NETDATA_API_QUERY_INCREMENTAL_SUM_H
4 #define NETDATA_API_QUERY_INCREMENTAL_SUM_H
5
6 #include "../query.h"
7 #include "../rrdr.h"
8
9 struct tg_incremental_sum {
10 NETDATA_DOUBLE first;
11 NETDATA_DOUBLE last;
12 size_t count;
13 };
14
15 // resets when switches dimensions
16 // so, clear everything to restart
17 static inline void tg_incremental_sum_reset(RRDR *r) {
18 struct tg_incremental_sum *g = (struct tg_incremental_sum *)r->time_grouping.data;
19 g->first = NAN;
20 g->last = NAN;
21 g->count = 0;
22 }
23
24 static inline void tg_incremental_sum_create(RRDR *r, const char *options __maybe_unused) {
25 r->time_grouping.data = onewayalloc_mallocz(r->internal.owa, sizeof(struct tg_incremental_sum));
26 tg_incremental_sum_reset(r);
27 }
28
29 static inline void tg_incremental_sum_free(RRDR *r) {
30 onewayalloc_freez(r->internal.owa, r->time_grouping.data);
31 r->time_grouping.data = NULL;
32 }
33
34 static inline void tg_incremental_sum_add(RRDR *r, NETDATA_DOUBLE value) {
35 struct tg_incremental_sum *g = (struct tg_incremental_sum *)r->time_grouping.data;
36
37 if(unlikely(!g->count)) {
38 if(isnan(g->first))
39 g->first = value;
40 else
41 g->last = value;
42
43 g->count++;
44 }
45 else {
46 g->last = value;
47 g->count++;
48 }
49 }
50
51 static inline NETDATA_DOUBLE tg_incremental_sum_flush(RRDR *r, RRDR_VALUE_FLAGS *rrdr_value_options_ptr) {
52 struct tg_incremental_sum *g = (struct tg_incremental_sum *)r->time_grouping.data;
53
54 NETDATA_DOUBLE value;
55
56 if(unlikely(!g->count || isnan(g->first) || isnan(g->last))) {
57 value = 0.0;
58 *rrdr_value_options_ptr |= RRDR_VALUE_EMPTY;
59 }
60 else {
61 value = g->last - g->first;
62 }
63
64 g->first = g->last;
65 g->last = NAN;
66 g->count = 0;
67
68 return value;
69 }
70
71 #endif //NETDATA_API_QUERY_INCREMENTAL_SUM_H