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Add ZSTD_defaultCLevel() function to public API

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Sen Huang 2021-03-24 10:43:48 -07:00
parent 413b3198b0
commit e398744a35
4 changed files with 16 additions and 0 deletions
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5
doc/zstd_manual.html
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@ -1441,6 +1441,11 @@ size_t ZSTD_freeCCtxParams(ZSTD_CCtx_params* params);
which have troubles handling structures containing memory pointers.
</p></pre><BR>
<pre><b>int ZSTD_defaultCLevel();
</b><p> Returns the default compression level, specified by ZSTD_CLEVEL_DEFAULT
</p></pre><BR>
<a name="Chapter18"></a><h2>Advanced decompression functions</h2><pre></pre>

1
lib/compress/zstd_compress.c
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@ -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 */

4
lib/zstd.h
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@ -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

6
tests/fuzzer.c
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@ -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);