1 files changed, 86 insertions, 0 deletions
diff --git a/fluent-bit/src/multiline/flb_ml_group.c b/fluent-bit/src/multiline/flb_ml_group.c
new file mode 100644
index 00000000..895a7105
--- /dev/null
+++ b/fluent-bit/src/multiline/flb_ml_group.c
@@ -0,0 +1,86 @@
+/* -*- 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/flb_mem.h>
+#include <fluent-bit/flb_log.h>
+#include <fluent-bit/multiline/flb_ml.h>
+#include <fluent-bit/multiline/flb_ml_parser.h>
+
+struct flb_ml_group *flb_ml_group_create(struct flb_ml *ml)
+{
+    struct flb_ml_group *group;
+
+    group = flb_calloc(1, sizeof(struct flb_ml_group));
+    if (!group) {
+        flb_errno();
+        return NULL;
+    }
+    group->id = mk_list_size(&ml->groups);
+    group->ml = ml;
+    group->lru_parser = NULL;
+    mk_list_init(&group->parsers);
+
+    mk_list_add(&group->_head, &ml->groups);
+
+    return group;
+}
+
+/*
+ * Link a parser instance into the active group, if no group exists, a default
+ * one is created.
+ */
+int flb_ml_group_add_parser(struct flb_ml *ctx, struct flb_ml_parser_ins *p)
+{
+    struct flb_ml_group *group = NULL;
+
+    if (mk_list_size(&ctx->groups) == 0) {
+        group = flb_ml_group_create(ctx);
+        if (!group) {
+            return -1;
+        }
+    }
+    else {
+        /* retrieve the latest active group */
+        group = mk_list_entry_last(&ctx->groups, struct flb_ml_group, _head);
+    }
+
+    if (!group) {
+        return -1;
+    }
+
+    mk_list_add(&p->_head, &group->parsers);
+    return 0;
+}
+
+void flb_ml_group_destroy(struct flb_ml_group *group)
+{
+    struct mk_list *head;
+    struct mk_list *tmp;
+    struct flb_ml_parser_ins *parser_i;
+
+    /* destroy parser instances */
+    mk_list_foreach_safe(head, tmp, &group->parsers) {
+        parser_i = mk_list_entry(head, struct flb_ml_parser_ins, _head);
+        flb_ml_parser_instance_destroy(parser_i);
+    }
+
+    mk_list_del(&group->_head);
+    flb_free(group);
+}