1 files changed, 148 insertions, 0 deletions
diff --git a/src/web/api/queries/countif/countif.h b/src/web/api/queries/countif/countif.h
new file mode 100644
index 000000000..af204a95a
--- /dev/null
+++ b/src/web/api/queries/countif/countif.h
@@ -0,0 +1,148 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#ifndef NETDATA_API_QUERY_COUNTIF_H
+#define NETDATA_API_QUERY_COUNTIF_H
+
+#include "../query.h"
+#include "../rrdr.h"
+
+enum tg_countif_cmp {
+    TG_COUNTIF_EQUAL,
+    TG_COUNTIF_NOTEQUAL,
+    TG_COUNTIF_LESS,
+    TG_COUNTIF_LESSEQUAL,
+    TG_COUNTIF_GREATER,
+    TG_COUNTIF_GREATEREQUAL,
+};
+
+struct tg_countif {
+    enum tg_countif_cmp comparison;
+    NETDATA_DOUBLE target;
+    size_t count;
+    size_t matched;
+};
+
+static inline void tg_countif_create(RRDR *r, const char *options __maybe_unused) {
+    struct tg_countif *g = onewayalloc_callocz(r->internal.owa, 1, sizeof(struct tg_countif));
+    r->time_grouping.data = g;
+
+    if(options && *options) {
+        // skip any leading spaces
+        while(isspace((uint8_t)*options)) options++;
+
+        // find the comparison function
+        switch(*options) {
+            case '!':
+                options++;
+                if(*options != '=' && *options != ':')
+                    options--;
+                g->comparison = TG_COUNTIF_NOTEQUAL;
+                break;
+
+            case '>':
+                options++;
+                if(*options == '=' || *options == ':') {
+                    g->comparison = TG_COUNTIF_GREATEREQUAL;
+                }
+                else {
+                    options--;
+                    g->comparison = TG_COUNTIF_GREATER;
+                }
+                break;
+
+            case '<':
+                options++;
+                if(*options == '>') {
+                    g->comparison = TG_COUNTIF_NOTEQUAL;
+                }
+                else if(*options == '=' || *options == ':') {
+                    g->comparison = TG_COUNTIF_LESSEQUAL;
+                }
+                else {
+                    options--;
+                    g->comparison = TG_COUNTIF_LESS;
+                }
+                break;
+
+            default:
+            case '=':
+            case ':':
+                g->comparison = TG_COUNTIF_EQUAL;
+                break;
+        }
+        if(*options) options++;
+
+        // skip everything up to the first digit
+        while(isspace((uint8_t)*options)) options++;
+
+        g->target = str2ndd(options, NULL);
+    }
+    else {
+        g->target = 0.0;
+        g->comparison = TG_COUNTIF_EQUAL;
+    }
+}
+
+// resets when switches dimensions
+// so, clear everything to restart
+static inline void tg_countif_reset(RRDR *r) {
+    struct tg_countif *g = (struct tg_countif *)r->time_grouping.data;
+    g->matched = 0;
+    g->count = 0;
+}
+
+static inline void tg_countif_free(RRDR *r) {
+    onewayalloc_freez(r->internal.owa, r->time_grouping.data);
+    r->time_grouping.data = NULL;
+}
+
+static inline void tg_countif_add(RRDR *r, NETDATA_DOUBLE value) {
+    struct tg_countif *g = (struct tg_countif *)r->time_grouping.data;
+    switch(g->comparison) {
+        case TG_COUNTIF_GREATER:
+            if(value > g->target) g->matched++;
+            break;
+
+        case TG_COUNTIF_GREATEREQUAL:
+            if(value >= g->target) g->matched++;
+            break;
+
+        case TG_COUNTIF_LESS:
+            if(value < g->target) g->matched++;
+            break;
+
+        case TG_COUNTIF_LESSEQUAL:
+            if(value <= g->target) g->matched++;
+            break;
+
+        case TG_COUNTIF_EQUAL:
+            if(value == g->target) g->matched++;
+            break;
+
+        case TG_COUNTIF_NOTEQUAL:
+            if(value != g->target) g->matched++;
+            break;
+    }
+    g->count++;
+}
+
+static inline NETDATA_DOUBLE tg_countif_flush(RRDR *r, RRDR_VALUE_FLAGS *rrdr_value_options_ptr) {
+    struct tg_countif *g = (struct tg_countif *)r->time_grouping.data;
+
+    NETDATA_DOUBLE value;
+
+    if(unlikely(!g->count)) {
+        value = 0.0;
+        *rrdr_value_options_ptr |= RRDR_VALUE_EMPTY;
+    }
+    else {
+        value = (NETDATA_DOUBLE)g->matched * 100 / (NETDATA_DOUBLE)g->count;
+    }
+
+    g->matched = 0;
+    g->count = 0;
+
+    return value;
+}
+
+#endif //NETDATA_API_QUERY_COUNTIF_H