From e398744a35ed10cba27e659bcab6d60312770cd5 Mon Sep 17 00:00:00 2001 From: Sen Huang Date: Wed, 24 Mar 2021 10:43:48 -0700 Subject: [PATCH] Add ZSTD_defaultCLevel() function to public API --- doc/zstd_manual.html | 5 +++++ lib/compress/zstd_compress.c | 1 + lib/zstd.h | 4 ++++ tests/fuzzer.c | 6 ++++++ 4 files changed, 16 insertions(+) diff --git a/doc/zstd_manual.html b/doc/zstd_manual.html index 450f19bc..15857959 100644 --- a/doc/zstd_manual.html +++ b/doc/zstd_manual.html @@ -1441,6 +1441,11 @@ size_t ZSTD_freeCCtxParams(ZSTD_CCtx_params* params); which have troubles handling structures containing memory pointers.


+ +
int ZSTD_defaultCLevel();
+
 Returns the default compression level, specified by ZSTD_CLEVEL_DEFAULT
+
+

Advanced decompression functions


 
diff --git a/lib/compress/zstd_compress.c b/lib/compress/zstd_compress.c
index 93c4075c..bd072337 100644
--- a/lib/compress/zstd_compress.c
+++ b/lib/compress/zstd_compress.c
@@ -5054,6 +5054,7 @@ size_t ZSTD_endStream(ZSTD_CStream* zcs, ZSTD_outBuffer* output)
 #define ZSTD_MAX_CLEVEL     22
 int ZSTD_maxCLevel(void) { return ZSTD_MAX_CLEVEL; }
 int ZSTD_minCLevel(void) { return (int)-ZSTD_TARGETLENGTH_MAX; }
+int ZSTD_defaultCLevel(void) { return ZSTD_CLEVEL_DEFAULT; }
 
 static const ZSTD_compressionParameters ZSTD_defaultCParameters[4][ZSTD_MAX_CLEVEL+1] = {
 {   /* "default" - for any srcSize > 256 KB */
diff --git a/lib/zstd.h b/lib/zstd.h
index 69b1a9be..0e3fb749 100644
--- a/lib/zstd.h
+++ b/lib/zstd.h
@@ -1918,6 +1918,10 @@ ZSTDLIB_API size_t ZSTD_compressStream2_simpleArgs (
                       const void* src, size_t srcSize, size_t* srcPos,
                             ZSTD_EndDirective endOp);
 
+/*! ZSTD_defaultCLevel() :
+ * Returns the default compression level, specified by ZSTD_CLEVEL_DEFAULT
+ */
+ZSTDLIB_API int ZSTD_defaultCLevel(void);
 
 /***************************************
 *  Advanced decompression functions
diff --git a/tests/fuzzer.c b/tests/fuzzer.c
index 5f707e02..41dc320e 100644
--- a/tests/fuzzer.c
+++ b/tests/fuzzer.c
@@ -374,6 +374,12 @@ static int basicUnitTests(U32 const seed, double compressibility)
         DISPLAYLEVEL(3, "%i (OK) \n", mcl);
     }
 
+    DISPLAYLEVEL(3, "test%3u : default compression level : ", testNb++);
+    {   int const defaultCLevel = ZSTD_defaultCLevel();
+        if (defaultCLevel != ZSTD_CLEVEL_DEFAULT) goto _output_error;
+        DISPLAYLEVEL(3, "%i (OK) \n", defaultCLevel);
+    }
+
     DISPLAYLEVEL(3, "test%3u : ZSTD_versionNumber : ", testNb++);
     {   unsigned const vn = ZSTD_versionNumber();
         DISPLAYLEVEL(3, "%u (OK) \n", vn);