From: Hitatm <gxnhit@gmail.com>
Date: Mon, 15 Jul 2019 14:53:46 +0000 (+0800)
Subject: bugfix: correctly control the offset < LZ4_DISTANCE_MAX,when change the value of... 
X-Git-Tag: upstream/1.9.3~2^2~14^2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=8ac954aa71edd5c13a0b9f6ab57eaece75efc28d;p=platform%2Fupstream%2Flz4.git

bugfix: correctly control the offset < LZ4_DISTANCE_MAX,when change the value of LZ4_DISTANCE_MAX,
---

diff --git a/lib/lz4hc.c b/lib/lz4hc.c
index 936f739..46c20bc 100644
--- a/lib/lz4hc.c
+++ b/lib/lz4hc.c
@@ -228,7 +228,7 @@ LZ4HC_InsertAndGetWiderMatch (
     const U32 dictLimit = hc4->dictLimit;
     const BYTE* const lowPrefixPtr = base + dictLimit;
     const U32 ipIndex = (U32)(ip - base);
-    const U32 lowestMatchIndex = (hc4->lowLimit + 64 KB > ipIndex) ? hc4->lowLimit : ipIndex - LZ4_DISTANCE_MAX;
+    const U32 lowestMatchIndex = (hc4->lowLimit + (LZ4_DISTANCE_MAX + 1) > ipIndex) ? hc4->lowLimit : ipIndex - LZ4_DISTANCE_MAX;
     const BYTE* const dictBase = hc4->dictBase;
     int const lookBackLength = (int)(ip-iLowLimit);
     int nbAttempts = maxNbAttempts;