From: W. Felix Handte <w@felixhandte.com>
Date: Wed, 6 Nov 2019 21:05:02 +0000 (-0500)
Subject: Fix #1861: Restrict overlapLog Parameter When Not Built With Multithreading
X-Git-Tag: v1.4.5^2~162^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c13f81905a3241dcef5ec9273eb5dfb326e83beb;p=thirdparty%2Fzstd.git

Fix #1861: Restrict overlapLog Parameter When Not Built With Multithreading

This parameter is unused in single-threaded compression. We should make it
behave like the other multithread-only parameters, for which we only accept
zero when we are not built with multithreading.
---

diff --git a/lib/compress/zstd_compress.c b/lib/compress/zstd_compress.c
index 35346b92c..edeac4b95 100644
--- a/lib/compress/zstd_compress.c
+++ b/lib/compress/zstd_compress.c
@@ -339,8 +339,13 @@ ZSTD_bounds ZSTD_cParam_getBounds(ZSTD_cParameter param)
         return bounds;
 
     case ZSTD_c_overlapLog:
+#ifdef ZSTD_MULTITHREAD
         bounds.lowerBound = ZSTD_OVERLAPLOG_MIN;
         bounds.upperBound = ZSTD_OVERLAPLOG_MAX;
+#else
+        bounds.lowerBound = 0;
+        bounds.upperBound = 0;
+#endif
         return bounds;
 
     case ZSTD_c_enableLongDistanceMatching: