1 files changed, 82 insertions, 0 deletions
diff --git a/fluent-bit/src/stream_processor/flb_sp_groupby.c b/fluent-bit/src/stream_processor/flb_sp_groupby.c
new file mode 100644
index 000000000..9cd72c230
--- /dev/null
+++ b/fluent-bit/src/stream_processor/flb_sp_groupby.c
@@ -0,0 +1,82 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+
+/*  Fluent Bit
+ *  ==========
+ *  Copyright (C) 2015-2022 The Fluent Bit Authors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+#include <fluent-bit/flb_info.h>
+#include <fluent-bit/stream_processor/flb_sp.h>
+
+int flb_sp_groupby_compare(const void *lhs, const void *rhs)
+{
+    int i;
+    int strcmp_result;
+    struct aggregate_node *left = (struct aggregate_node *) lhs;
+    struct aggregate_node *right = (struct aggregate_node *) rhs;
+    struct aggregate_num *lval;
+    struct aggregate_num *rval;
+
+    for (i = 0; i < left->groupby_keys; i++) {
+        lval = &left->groupby_nums[i];
+        rval = &right->groupby_nums[i];
+
+        /* Convert integer to double if a float value appears on one side */
+        if (lval->type == FLB_SP_NUM_I64 && rval->type == FLB_SP_NUM_F64) {
+            lval->type = FLB_SP_NUM_F64;
+            lval->f64 = (double) lval->i64;
+        }
+        else if (lval->type == FLB_SP_NUM_F64 && rval->type == FLB_SP_NUM_I64) {
+            rval->type = FLB_SP_NUM_F64;
+            rval->f64 = (double) rval->i64;
+        }
+
+        /* Comparison */
+        if (lval->type == FLB_SP_BOOLEAN && rval->type == FLB_SP_BOOLEAN) {
+            if (lval->boolean != rval->boolean) {
+                return 1;
+            }
+        }
+        else if (lval->type == FLB_SP_NUM_I64 && rval->type == FLB_SP_NUM_I64) {
+            if (lval->i64 > rval->i64) {
+                return 1;
+            }
+
+            if (lval->i64 < rval->i64) {
+                return -1;
+            }
+        }
+        else if (lval->type == FLB_SP_NUM_F64 &&  rval->type == FLB_SP_NUM_F64) {
+            if (lval->f64 > rval->f64) {
+                return 1;
+            }
+
+            if (lval->f64 < rval->f64) {
+                return -1;
+            }
+        }
+        else if (lval->type == FLB_SP_STRING && rval->type == FLB_SP_STRING) {
+            strcmp_result = strcmp((const char *) lval->string, (const char *) rval->string);
+            if (strcmp_result != 0) {
+              return strcmp_result;
+            }
+        }
+        else { /* Sides have different types */
+            return -1;
+        }
+    }
+
+    return 0;
+}