From f3460fc148fc828b9c33b1a3967b6e494ad1f8f2 Mon Sep 17 00:00:00 2001
From: Alexey Tourbin <alexey.tourbin@gmail.com>
Date: Sat, 29 Apr 2017 15:00:47 +0300
Subject: liz4hc.h: fix a comment: LZ4HC_MAX_CLEVEL -> LZ4HC_CLEVEL_MAX

---
 lib/lz4hc.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/lz4hc.h b/lib/lz4hc.h
index 2e3880d..c4284c0 100644
--- a/lib/lz4hc.h
+++ b/lib/lz4hc.h
@@ -58,8 +58,8 @@ extern "C" {
  * `dst` must be already allocated.
  * Compression is guaranteed to succeed if `dstCapacity >= LZ4_compressBound(srcSize)` (see "lz4.h")
  * Max supported `srcSize` value is LZ4_MAX_INPUT_SIZE (see "lz4.h")
- * `compressionLevel` : Recommended values are between 4 and 9, although any value between 1 and LZ4HC_MAX_CLEVEL will work.
- *                      Values >LZ4HC_MAX_CLEVEL behave the same as LZ4HC_MAX_CLEVEL.
+ * `compressionLevel` : Recommended values are between 4 and 9, although any value between 1 and LZ4HC_CLEVEL_MAX will work.
+ *                      Values >LZ4HC_CLEVEL_MAX behave the same as LZ4HC_CLEVEL_MAX.
  * @return : the number of bytes written into 'dst'
  *           or 0 if compression fails.
  */
-- 
cgit v0.12


From a41df535f709fcb6ccba079dd4d630c4ec4f7151 Mon Sep 17 00:00:00 2001
From: Alexey Tourbin <alexey.tourbin@gmail.com>
Date: Sat, 29 Apr 2017 15:16:51 +0300
Subject: lz4cli.c: fix a comment: LZ4HC_DEFAULT_CLEVEL -> LZ4HC_CLEVEL_MAX

Actually the program only mentions LZ4HC_CLEVEL_MAX.
---
 programs/lz4cli.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/programs/lz4cli.c b/programs/lz4cli.c
index 329ca0b..10aa5aa 100644
--- a/programs/lz4cli.c
+++ b/programs/lz4cli.c
@@ -49,7 +49,7 @@
 #include <string.h>   /* strcmp, strlen */
 #include "bench.h"    /* BMK_benchFile, BMK_SetNbIterations, BMK_SetBlocksize, BMK_SetPause */
 #include "lz4io.h"    /* LZ4IO_compressFilename, LZ4IO_decompressFilename, LZ4IO_compressMultipleFilenames */
-#include "lz4hc.h"    /* LZ4HC_DEFAULT_CLEVEL */
+#include "lz4hc.h"    /* LZ4HC_CLEVEL_MAX */
 #include "lz4.h"      /* LZ4_VERSION_STRING */
 
 
-- 
cgit v0.12


From 6cf1f7d758c23d6033d388eabbbb50380c364d2e Mon Sep 17 00:00:00 2001
From: Alexey Tourbin <alexey.tourbin@gmail.com>
Date: Sat, 29 Apr 2017 15:52:51 +0300
Subject: lz4hc.c: clamp compression levels > 12

I noticed that, while 'lz4 -12' works fine, 'lz4 -13' does not compress
at all.

$ cat </etc/passwd |wc -c
2565
$ lz4 -12 </etc/passwd |wc -c
1456
$ lz4 -13 </etc/passwd |wc -c
2584

Perhaps the best way to fix this is to clamp the compression level
in the LZ4HC_compress_generic routine.
---
 lib/lz4hc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/lz4hc.c b/lib/lz4hc.c
index ac15d20..16fe029 100644
--- a/lib/lz4hc.c
+++ b/lib/lz4hc.c
@@ -555,6 +555,8 @@ static int LZ4HC_compress_generic (
                 ctx->searchNum = LZ4HC_getSearchNum(cLevel);
                 return LZ4HC_compress_optimal(ctx, src, dst, *srcSizePtr, dstCapacity, limit, 128, 0);
             default:
+                cLevel = 12;
+                /* pass-through */
             case 12:
                 ctx->searchNum = LZ4HC_getSearchNum(cLevel);
                 return LZ4HC_compress_optimal(ctx, src, dst, *srcSizePtr, dstCapacity, limit, LZ4_OPT_NUM, 1);
-- 
cgit v0.12