Move ZlibDecompressor to libshared

* This will be used to implement compressed http streams
* Remove the custom BDataOutput class, and use BDataIO instead, for
easier integration with existing code.

headers/private/shared/ZlibCompressionBase.h

@@ -0,0 +1,23 @@
+/*
+ * Copyright 2009, Ingo Weinhold, [email protected].
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef _PRIVATE__ZLIB_COMPRESSION_BASE_H_
+#define _PRIVATE__ZLIB_COMPRESSION_BASE_H_
+
+
+#include <SupportDefs.h>
+
+
+namespace BPrivate {
+
+
+class ZlibCompressionBase {
+public:
+	static	status_t			TranslateZlibError(int error);
+};
+
+
+}	// namespace BPrivate
+
+#endif	// _PRIVATE__ZLIB_COMPRESSION_BASE_H_

headers/private/shared/ZlibDecompressor.h

@@ -0,0 +1,45 @@
+/*
+ * Copyright 2009, Ingo Weinhold, [email protected].
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef _PRIVATE__ZLIB_DECOMPRESSOR_H_
+#define _PRIVATE__ZLIB_DECOMPRESSOR_H_
+
+
+#include <zlib.h>
+
+#include <ZlibCompressionBase.h>
+
+
+class BDataIO;
+
+
+namespace BPrivate {
+
+
+class ZlibDecompressor : public ZlibCompressionBase {
+public:
+								ZlibDecompressor(BDataIO* output);
+								~ZlibDecompressor();
+
+			status_t			Init();
+			status_t			DecompressNext(const void* input,
+									size_t inputSize);
+			status_t			Finish();
+
+	static	status_t			DecompressSingleBuffer(const void* input,
+									size_t inputSize, void* output,
+									size_t outputSize,
+									size_t& _uncompressedSize);
+
+private:
+			z_stream			fStream;
+			BDataIO*			fOutput;
+			bool				fStreamInitialized;
+			bool				fFinished;
+};
+
+
+}	// namespace BPrivate
+
+#endif	// _PACKAGE__HPKG__PRIVATE__ZLIB_DECOMPRESSOR_H_