Adding upstream version 1.37.1.upstream/1.37.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 66 insertions, 0 deletions

diff --git a/web/api/queries/incremental_sum/incremental_sum.c b/web/api/queries/incremental_sum/incremental_sum.c
new file mode 100644
index 0000000..afca530
--- /dev/null
+++ b/web/api/queries/incremental_sum/incremental_sum.c
@@ -0,0 +1,66 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "incremental_sum.h"
+
+// ----------------------------------------------------------------------------
+// incremental sum
+
+struct grouping_incremental_sum {
+    NETDATA_DOUBLE first;
+    NETDATA_DOUBLE last;
+    size_t count;
+};
+
+void grouping_create_incremental_sum(RRDR *r, const char *options __maybe_unused) {
+    r->internal.grouping_data = onewayalloc_callocz(r->internal.owa, 1, sizeof(struct grouping_incremental_sum));
+}
+
+// resets when switches dimensions
+// so, clear everything to restart
+void grouping_reset_incremental_sum(RRDR *r) {
+    struct grouping_incremental_sum *g = (struct grouping_incremental_sum *)r->internal.grouping_data;
+    g->first = 0;
+    g->last = 0;
+    g->count = 0;
+}
+
+void grouping_free_incremental_sum(RRDR *r) {
+    onewayalloc_freez(r->internal.owa, r->internal.grouping_data);
+    r->internal.grouping_data = NULL;
+}
+
+void grouping_add_incremental_sum(RRDR *r, NETDATA_DOUBLE value) {
+    struct grouping_incremental_sum *g = (struct grouping_incremental_sum *)r->internal.grouping_data;
+
+    if(unlikely(!g->count)) {
+        g->first = value;
+        g->count++;
+    }
+    else {
+        g->last = value;
+        g->count++;
+    }
+}
+
+NETDATA_DOUBLE grouping_flush_incremental_sum(RRDR *r, RRDR_VALUE_FLAGS *rrdr_value_options_ptr) {
+    struct grouping_incremental_sum *g = (struct grouping_incremental_sum *)r->internal.grouping_data;
+
+    NETDATA_DOUBLE value;
+
+    if(unlikely(!g->count)) {
+        value = 0.0;
+        *rrdr_value_options_ptr |= RRDR_VALUE_EMPTY;
+    }
+    else if(unlikely(g->count == 1)) {
+        value = 0.0;
+    }
+    else {
+        value = g->last - g->first;
+    }
+
+    g->first = 0.0;
+    g->last = 0.0;
+    g->count = 0;
+
+    return value;
+}