1 files changed, 122 insertions, 0 deletions
diff --git a/utils/utils.c b/utils/utils.c
new file mode 100644
index 0000000..59d02f1
--- /dev/null
+++ b/utils/utils.c
@@ -0,0 +1,122 @@
+/*
+ * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
+ * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 2.1
+ * as published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <libubox/avl.h>
+#include <libubox/avl-cmp.h>
+#include "utils.h"
+
+void
+__blobmsg_list_init(struct blobmsg_list *list, int offset, int len, blobmsg_list_cmp cmp)
+{
+	avl_init(&list->avl, avl_strcmp, false, NULL);
+	list->node_offset = offset;
+	list->node_len = len;
+	list->cmp = cmp;
+}
+
+int
+blobmsg_list_fill(struct blobmsg_list *list, void *data, int len, bool array)
+{
+	struct avl_tree *tree = &list->avl;
+	struct blobmsg_list_node *node;
+	struct blob_attr *cur;
+	void *ptr;
+	int count = 0;
+	int rem = len;
+
+	__blob_for_each_attr(cur, data, rem) {
+		if (!blobmsg_check_attr(cur, !array))
+			continue;
+
+		ptr = calloc(1, list->node_len);
+		if (!ptr)
+			return -1;
+
+		node = (void *) ((char *)ptr + list->node_offset);
+		if (array)
+			node->avl.key = blobmsg_data(cur);
+		else
+			node->avl.key = blobmsg_name(cur);
+		node->data = cur;
+		if (avl_insert(tree, &node->avl)) {
+			free(ptr);
+			continue;
+		}
+
+		count++;
+	}
+
+	return count;
+}
+
+void
+blobmsg_list_move(struct blobmsg_list *list, struct blobmsg_list *src)
+{
+	struct blobmsg_list_node *node, *tmp;
+	void *ptr;
+
+	avl_remove_all_elements(&src->avl, node, avl, tmp) {
+		if (avl_insert(&list->avl, &node->avl)) {
+			ptr = ((char *) node - list->node_offset);
+			free(ptr);
+		}
+	}
+}
+
+void
+blobmsg_list_free(struct blobmsg_list *list)
+{
+	struct blobmsg_list_node *node, *tmp;
+	void *ptr;
+
+	avl_remove_all_elements(&list->avl, node, avl, tmp) {
+		ptr = ((char *) node - list->node_offset);
+		free(ptr);
+	}
+}
+
+bool
+blobmsg_list_equal(struct blobmsg_list *l1, struct blobmsg_list *l2)
+{
+	struct blobmsg_list_node *n1, *n2;
+	int count = l1->avl.count;
+
+	if (count != l2->avl.count)
+		return false;
+
+	n1 = avl_first_element(&l1->avl, n1, avl);
+	n2 = avl_first_element(&l2->avl, n2, avl);
+
+	while (count-- > 0) {
+		int len;
+
+		len = blob_len(n1->data);
+		if (len != blob_len(n2->data))
+			return false;
+
+		if (memcmp(n1->data, n2->data, len) != 0)
+			return false;
+
+		if (l1->cmp && !l1->cmp(n1, n2))
+			return false;
+
+		if (!count)
+			break;
+
+		n1 = avl_next_element(n1, avl);
+		n2 = avl_next_element(n2, avl);
+	}
+
+	return true;
+}