From: Yann Collet <yann.collet.73@gmail.com>
Date: Fri, 6 Nov 2015 16:13:46 +0000 (+0100)
Subject: minor CRatio improvement
X-Git-Tag: zstd-0.3.5^2~13
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=47cfa9a98539ff0acf31ac2428b90a56e18a1071;p=thirdparty%2Fzstd.git

minor CRatio improvement
---

diff --git a/lib/zstdhc.c b/lib/zstdhc.c
index a8e6631e8..e2dfafc1d 100644
--- a/lib/zstdhc.c
+++ b/lib/zstdhc.c
@@ -707,6 +707,8 @@ size_t ZSTD_HC_compressBlock_lazy_generic(ZSTD_HC_CCtx* ctx,
         }
 
         /* store sequence */
+        if (offset)
+        while ((start>anchor) && (start-offset>ctx->base) && (start[-1] == start[-1-offset])) { start--; matchLength++; }  /* catch up */
         {
             size_t litLength = start - anchor;
             if (offset) offset_1 = offset;