From: inikep <inikep@gmail.com>
Date: Fri, 15 Apr 2016 11:44:46 +0000 (+0200)
Subject: introduced ZSTD_DEAFULT_CLEVEL for (compressionLevel<=0)
X-Git-Tag: v0.6.1^2~39^2~22
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2c5eeea635f901a44a6b31ef184cee93683a2f66;p=thirdparty%2Fzstd.git

introduced ZSTD_DEAFULT_CLEVEL for (compressionLevel<=0)
---

diff --git a/lib/zstd_compress.c b/lib/zstd_compress.c
index 86d83ee6d..463ae11ae 100644
--- a/lib/zstd_compress.c
+++ b/lib/zstd_compress.c
@@ -2431,7 +2431,8 @@ size_t ZSTD_compress(void* dst, size_t dstCapacity, const void* src, size_t srcS
 
 /*-=====  Pre-defined compression levels  =====-*/
 
-#define ZSTD_MAX_CLEVEL 22
+#define ZSTD_DEAFULT_CLEVEL 5
+#define ZSTD_MAX_CLEVEL     22
 unsigned ZSTD_maxCLevel(void) { return ZSTD_MAX_CLEVEL; }
 
 static const ZSTD_compressionParameters ZSTD_defaultCParameters[4][ZSTD_MAX_CLEVEL+1] = {
@@ -2550,7 +2551,8 @@ ZSTD_compressionParameters ZSTD_getCParams(int compressionLevel, U64 srcSize, si
     size_t const addedSize = srcSize ? 0 : 500;
     U64 const rSize = srcSize+dictSize ? srcSize+dictSize+addedSize : (U64)-1;
     U32 const tableID = (rSize <= 256 KB) + (rSize <= 128 KB) + (rSize <= 16 KB);   /* intentional underflow for srcSizeHint == 0 */
-    if (compressionLevel<=0) compressionLevel = 1;
+    if (compressionLevel < 0) compressionLevel = ZSTD_DEAFULT_CLEVEL;
+    if (compressionLevel==0) compressionLevel = 1;
     if (compressionLevel > ZSTD_MAX_CLEVEL) compressionLevel = ZSTD_MAX_CLEVEL;
     cp = ZSTD_defaultCParameters[tableID][compressionLevel];
     if (MEM_32bits()) {   /* auto-correction, for 32-bits mode */