From: senhuang42 <senhuang96@fb.com>
Date: Tue, 27 Oct 2020 15:02:58 +0000 (-0400)
Subject: Add support for repcodes
X-Git-Tag: v1.4.7~30^2~47
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=89f3848310aa11bcd9c01dbe253271c61fa319a5;p=thirdparty%2Fzstd.git

Add support for repcodes
---

diff --git a/lib/compress/zstd_compress.c b/lib/compress/zstd_compress.c
index cdfc39c20..cb227bea5 100644
--- a/lib/compress/zstd_compress.c
+++ b/lib/compress/zstd_compress.c
@@ -4505,7 +4505,11 @@ static size_t ZSTD_copySequencesToSeqStore(ZSTD_CCtx* zc,
         U32 offCode = inSeqs[idx].offset + ZSTD_REP_MOVE;
         RETURN_ERROR_IF(matchLength < MINMATCH, corruption_detected, "Matchlength too small!");
         DEBUGLOG(7, "Seqstore idx: %zu, seq: (ll: %u, ml: %u, of: %u)", idx, litLength, matchLength, offCode);
-        ZSTD_storeSeq(&zc->seqStore, litLength, ip, iend, offCode, matchLength - MINMATCH);
+        if (inSeqs[idx].rep) {
+            ZSTD_storeSeq(&zc->seqStore, litLength, ip, iend, inSeqs[idx].rep - 1, matchLength - MINMATCH);
+        } else {
+            ZSTD_storeSeq(&zc->seqStore, litLength, ip, iend, offCode, matchLength - MINMATCH);
+        }
         ip += matchLength + litLength;
     }
 
diff --git a/lib/compress/zstd_compress_internal.h b/lib/compress/zstd_compress_internal.h
index 3ff318d53..6b6d101f8 100644
--- a/lib/compress/zstd_compress_internal.h
+++ b/lib/compress/zstd_compress_internal.h
@@ -497,6 +497,9 @@ static void ZSTD_safecopyLiterals(BYTE* op, BYTE const* ip, BYTE const* const ie
 HINT_INLINE UNUSED_ATTR
 void ZSTD_storeSeq(seqStore_t* seqStorePtr, size_t litLength, const BYTE* literals, const BYTE* litLimit, U32 offCode, size_t mlBase)
 {
+    if (offCode <= 3) {
+        printf("of: %u ml: %u ll: %u\n", offCode, mlBase, litLength);
+    }
     BYTE const* const litLimit_w = litLimit - WILDCOPY_OVERLENGTH;
     BYTE const* const litEnd = literals + litLength;
 #if defined(DEBUGLEVEL) && (DEBUGLEVEL >= 6)