src/web/api/queries/incremental_sum/incremental_sum.h
// SPDX-License-Identifier: GPL-3.0-or-later
#ifndef NETDATA_API_QUERY_INCREMENTAL_SUM_H
#define NETDATA_API_QUERY_INCREMENTAL_SUM_H
#include "../query.h"
#include "../rrdr.h"
struct tg_incremental_sum {
NETDATA_DOUBLE first;
NETDATA_DOUBLE last;
size_t count;
};
// resets when switches dimensions
// so, clear everything to restart
static inline void tg_incremental_sum_reset(RRDR *r) {
struct tg_incremental_sum *g = (struct tg_incremental_sum *)r->time_grouping.data;
g->first = NAN;
g->last = NAN;
g->count = 0;
}
static inline void tg_incremental_sum_create(RRDR *r, const char *options __maybe_unused) {
r->time_grouping.data = onewayalloc_mallocz(r->internal.owa, sizeof(struct tg_incremental_sum));
tg_incremental_sum_reset(r);
}
static inline void tg_incremental_sum_free(RRDR *r) {
onewayalloc_freez(r->internal.owa, r->time_grouping.data);
r->time_grouping.data = NULL;
}
static inline void tg_incremental_sum_add(RRDR *r, NETDATA_DOUBLE value) {
struct tg_incremental_sum *g = (struct tg_incremental_sum *)r->time_grouping.data;
if(unlikely(!g->count)) {
if(isnan(g->first))
g->first = value;
else
g->last = value;
g->count++;
}
else {
g->last = value;
g->count++;
}
}
static inline NETDATA_DOUBLE tg_incremental_sum_flush(RRDR *r, RRDR_VALUE_FLAGS *rrdr_value_options_ptr) {
struct tg_incremental_sum *g = (struct tg_incremental_sum *)r->time_grouping.data;
NETDATA_DOUBLE value;
if(unlikely(!g->count || isnan(g->first) || isnan(g->last))) {
value = 0.0;
*rrdr_value_options_ptr |= RRDR_VALUE_EMPTY;
}
else {
value = g->last - g->first;
}
g->first = g->last;
g->last = NAN;
g->count = 0;
return value;
}
#endif //NETDATA_API_QUERY_INCREMENTAL_SUM_H