From c454872f4e81e69a8e9950289ab810fcac3fc922 Mon Sep 17 00:00:00 2001
From: Ondrej Filip <feela@network.cz>
Date: Sun, 27 Mar 2011 23:27:37 +0200
Subject: Avoid using stack.

---
 filter/config.Y | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/filter/config.Y b/filter/config.Y
index d1dd081e..ebe6f498 100644
--- a/filter/config.Y
+++ b/filter/config.Y
@@ -27,15 +27,17 @@ static int make_pair(int i1, int i2)
 
 struct f_tree *f_generate_rev_wcard(int from, int to, int expr)
 {
-	struct f_tree * ret = NULL;
-	if(from <= to) {
+	struct f_tree *ret = NULL, *last = NULL;
+
+	while (from <= to) {
 		ret = f_new_tree(); 
 		ret->from.type = ret->to.type = T_PAIR;
 		ret->from.val.i = ret->to.val.i = make_pair(from, expr); 
-		ret->left = f_generate_rev_wcard(from+1, to, expr);
+		ret->left = last;
+
+		from++; last = ret;
 	}
 	return ret;
-
 }
 
 CF_DECLS
-- 
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