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-rw-r--r--src/search/tsearch_avl.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/src/search/tsearch_avl.c b/src/search/tsearch_avl.c
index f5c2cf61..b56159b9 100644
--- a/src/search/tsearch_avl.c
+++ b/src/search/tsearch_avl.c
@@ -1,6 +1,12 @@
#include <stdlib.h>
#include <search.h>
+/*
+avl tree implementation using recursive functions
+the height of an n node tree is less than 1.44*log2(n+2)-1
+(so the max recursion depth in case of a tree with 2^32 nodes is 45)
+*/
+
struct node {
const void *key;
struct node *left;