Merge pull request #349 from svpv/master

clamp hc levels > 12 + minor fixes in comments

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);

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.
  */

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 */