From a12b728745cf68dfda53dfa3e6b522ecd8fc7dcf Mon Sep 17 00:00:00 2001
From: matz <matz@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Mon, 7 Aug 2006 08:10:12 +0000
Subject: * ext/syck/syck.c (syck_move_tokens): should avoid negative  
 memmove.  [ruby-list:42625]

git-svn-id: http://svn.ruby-lang.org/repos/ruby/branches/ruby_1_8@10698 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ext/syck/syck.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'ext')

diff --git a/ext/syck/syck.c b/ext/syck/syck.c
index 24a56a5e4..a83c8813c 100644
--- a/ext/syck/syck.c
+++ b/ext/syck/syck.c
@@ -412,7 +412,8 @@ syck_move_tokens( SyckParser *p )
     skip = p->limit - p->token;
     if ( ( count = p->token - p->buffer ) )
     {
-        S_MEMMOVE( p->buffer, p->token, char, skip );
+	if (skip > 0)
+	    S_MEMMOVE( p->buffer, p->token, char, skip );
         p->token = p->buffer;
         p->marker -= count;
         p->cursor -= count;
-- 
cgit