Add ZstdCompressionAlgorithm.

* kernel lib is decompress only (like zlib).
* expand compression_test for zstd.

headers/build/private/support/ZstdCompressionAlgorithm.h

@@ -0,0 +1 @@
+#include <../private/support/ZstdCompressionAlgorithm.h>

headers/private/support/ZstdCompressionAlgorithm.h

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+/*
+ * Copyright 2017, Jérôme Duval.
+ * Copyright 2014, Ingo Weinhold, [email protected].
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef _ZSTD_COMPRESSION_ALGORITHM_H_
+#define _ZSTD_COMPRESSION_ALGORITHM_H_
+
+
+#include <CompressionAlgorithm.h>
+
+
+// compression level
+enum {
+	B_ZSTD_COMPRESSION_NONE		= 0,
+	B_ZSTD_COMPRESSION_FASTEST	= 1,
+	B_ZSTD_COMPRESSION_BEST		= 19,
+	B_ZSTD_COMPRESSION_DEFAULT	= 2,
+};
+
+
+class BZstdCompressionParameters : public BCompressionParameters {
+public:
+								BZstdCompressionParameters(
+									int compressionLevel
+										= B_ZSTD_COMPRESSION_DEFAULT);
+	virtual						~BZstdCompressionParameters();
+
+			int32				CompressionLevel() const;
+			void				SetCompressionLevel(int32 level);
+
+			size_t				BufferSize() const;
+			void				SetBufferSize(size_t size);
+
+private:
+			int32				fCompressionLevel;
+			size_t				fBufferSize;
+};
+
+
+class BZstdDecompressionParameters : public BDecompressionParameters {
+public:
+								BZstdDecompressionParameters();
+	virtual						~BZstdDecompressionParameters();
+
+			size_t				BufferSize() const;
+			void				SetBufferSize(size_t size);
+
+private:
+			size_t				fBufferSize;
+};
+
+
+class BZstdCompressionAlgorithm : public BCompressionAlgorithm {
+public:
+								BZstdCompressionAlgorithm();
+	virtual						~BZstdCompressionAlgorithm();
+
+	virtual	status_t			CreateCompressingInputStream(BDataIO* input,
+									const BCompressionParameters* parameters,
+									BDataIO*& _stream);
+	virtual	status_t			CreateCompressingOutputStream(BDataIO* output,
+									const BCompressionParameters* parameters,
+									BDataIO*& _stream);
+	virtual	status_t			CreateDecompressingInputStream(BDataIO* input,
+									const BDecompressionParameters* parameters,
+									BDataIO*& _stream);
+	virtual	status_t			CreateDecompressingOutputStream(BDataIO* output,
+									const BDecompressionParameters* parameters,
+									BDataIO*& _stream);
+
+	virtual	status_t			CompressBuffer(const void* input,
+									size_t inputSize, void* output,
+									size_t outputSize, size_t& _compressedSize,
+									const BCompressionParameters* parameters
+										= NULL);
+	virtual	status_t			DecompressBuffer(const void* input,
+									size_t inputSize, void* output,
+									size_t outputSize,
+									size_t& _uncompressedSize,
+									const BDecompressionParameters* parameters
+										= NULL);
+
+private:
+			struct CompressionStrategy;
+			struct DecompressionStrategy;
+
+			template<typename BaseClass, typename Strategy, typename StreamType> struct Stream;
+			template<typename BaseClass, typename Strategy, typename StreamType>
+				friend struct Stream;
+
+private:
+	static	status_t			_TranslateZstdError(size_t error);
+};
+
+
+#endif	// _ZSTD_COMPRESSION_ALGORITHM_H_