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-rw-r--r--web/api/queries/average/average.c62
1 files changed, 62 insertions, 0 deletions
diff --git a/web/api/queries/average/average.c b/web/api/queries/average/average.c
new file mode 100644
index 0000000..2c64358
--- /dev/null
+++ b/web/api/queries/average/average.c
@@ -0,0 +1,62 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "average.h"
+
+// ----------------------------------------------------------------------------
+// average
+
+struct grouping_average {
+ calculated_number sum;
+ size_t count;
+};
+
+void *grouping_create_average(RRDR *r) {
+ (void)r;
+ return callocz(1, sizeof(struct grouping_average));
+}
+
+// resets when switches dimensions
+// so, clear everything to restart
+void grouping_reset_average(RRDR *r) {
+ struct grouping_average *g = (struct grouping_average *)r->internal.grouping_data;
+ g->sum = 0;
+ g->count = 0;
+}
+
+void grouping_free_average(RRDR *r) {
+ freez(r->internal.grouping_data);
+ r->internal.grouping_data = NULL;
+}
+
+void grouping_add_average(RRDR *r, calculated_number value) {
+ if(!isnan(value)) {
+ struct grouping_average *g = (struct grouping_average *)r->internal.grouping_data;
+ g->sum += value;
+ g->count++;
+ }
+}
+
+calculated_number grouping_flush_average(RRDR *r, RRDR_VALUE_FLAGS *rrdr_value_options_ptr) {
+ struct grouping_average *g = (struct grouping_average *)r->internal.grouping_data;
+
+ calculated_number value;
+
+ if(unlikely(!g->count)) {
+ value = 0.0;
+ *rrdr_value_options_ptr |= RRDR_VALUE_EMPTY;
+ }
+ else {
+ if(unlikely(r->internal.resampling_group != 1)) {
+ if (unlikely(r->result_options & RRDR_RESULT_OPTION_VARIABLE_STEP))
+ value = g->sum / g->count / r->internal.resampling_divisor;
+ else
+ value = g->sum / r->internal.resampling_divisor;
+ } else
+ value = g->sum / g->count;
+ }
+
+ g->sum = 0.0;
+ g->count = 0;
+
+ return value;
+}