From 17cf250aff26d3baa6b311a3404f1a932e16cf17 Mon Sep 17 00:00:00 2001
From: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Date: Wed, 7 Jun 2006 20:05:43 +0200
Subject: [PATCH] Off-by-one error in get_path_prefix(), found by Valgrind

[jc: original fix was done by Pavel and this contains improvements
 by Rene.]

Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Acked-by: Pavel Roskin <proski@gnu.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
---
 builtin-tar-tree.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/builtin-tar-tree.c b/builtin-tar-tree.c
index 5f740cf70..7663b9bd8 100644
--- a/builtin-tar-tree.c
+++ b/builtin-tar-tree.c
@@ -168,8 +168,9 @@ static int get_path_prefix(const struct strbuf *path, int maxlen)
 	int i = path->len;
 	if (i > maxlen)
 		i = maxlen;
-	while (i > 0 && path->buf[i] != '/')
+	do {
 		i--;
+	} while (i > 0 && path->buf[i] != '/');
 	return i;
 }
 
-- 
2.30.2