From 525f3fab3360f29e4c64b3dfa4ae9699f68eb18d Mon Sep 17 00:00:00 2001
From: Yann Collet <cyan@fb.com>
Date: Wed, 28 Mar 2018 11:33:41 -0600
Subject: [PATCH] restored ability to manually set overlapLog

---
 programs/fileio.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/programs/fileio.c b/programs/fileio.c
index 14569bb47..5e3928ef3 100644
--- a/programs/fileio.c
+++ b/programs/fileio.c
@@ -466,6 +466,13 @@ static cRess_t FIO_createCResources(const char* dictFileName, int cLevel,
 #ifdef ZSTD_MULTITHREAD
         DISPLAYLEVEL(5,"set nb workers = %u \n", g_nbWorkers);
         CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_p_nbWorkers, g_nbWorkers) );
+        if ( (g_overlapLog == FIO_OVERLAP_LOG_NOTSET)
+          && (cLevel == ZSTD_maxCLevel()) )
+            g_overlapLog = 9;   /* full overlap */
+        if (g_overlapLog != FIO_OVERLAP_LOG_NOTSET) {
+            DISPLAYLEVEL(3,"set overlapLog = %u \n", g_overlapLog);
+            CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_p_overlapSizeLog, g_overlapLog) );
+        }
 #endif
         /* dictionary */
         CHECK( ZSTD_CCtx_setPledgedSrcSize(ress.cctx, srcSize) );  /* set the value temporarily for dictionary loading, to adapt compression parameters */