+ * Internal function to support returning the element from a avl tree query
+ * @param tree pointer to avl tree
+ * @param key pointer to key
+ * @param offset offset of node inside the embedded struct
+ * @param mode mode of lookup operation (less equal, equal or greater equal)
+ * @param pointer to elemen, NULL if no fitting one was found
+ */
+static inline void *
+__avl_find_element(const struct avl_tree *tree, const void *key, size_t offset, enum avl_find_mode mode) {
+ void *node = NULL;
+
+ switch (mode) {
+ case AVL_FIND_EQUAL:
+ node = avl_find(tree, key);
+ break;
+ case AVL_FIND_LESSEQUAL:
+ node = avl_find_lessequal(tree, key);
+ break;
+ case AVL_FIND_GREATEREQUAL:
+ node = avl_find_greaterequal(tree, key);
+ break;
+ }
+ return node == NULL ? NULL : (((char *)node) - offset);
+}
+
+/**