From: Yann Collet <yann.collet.73@gmail.com>
Date: Tue, 17 Nov 2015 15:14:55 +0000 (+0100)
Subject: fix compression bug in rollbuffer mode
X-Git-Tag: zstd-0.4.0^2~23^2~41
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=94b9d8ec8db8d4ca937ea55502e89a579c33c8cd;p=thirdparty%2Fzstd.git

fix compression bug in rollbuffer mode
---

diff --git a/lib/zstd_compress.c b/lib/zstd_compress.c
index ad3db50c5..53dfc742f 100644
--- a/lib/zstd_compress.c
+++ b/lib/zstd_compress.c
@@ -867,7 +867,7 @@ size_t ZSTD_compressBlock_fast_extDict_generic(ZSTD_CCtx* ctx,
             const BYTE* iEndCount = (matchEnd - match < iend - ip) ? ip + (matchEnd - match) : iend;
             size_t matchLength = ZSTD_count(ip+MINMATCH, match+MINMATCH, iEndCount);
             size_t offsetCode = current-matchIndex;
-            if (matchIndex + matchLength + MINMATCH == dictLimit)
+            if (match + matchLength + MINMATCH == matchEnd)
                 matchLength += ZSTD_count(ip + matchLength + MINMATCH, base + dictLimit, iend);
             if (offsetCode == offset_2) offsetCode = 0;
             offset_2 = offset_1;