src/stream/ZStream_ZLib.h

/*  @(#) $Id: ZStream_ZLib.h,v 1.10 2006/04/10 20:44:21 agreen Exp $ */

/* ------------------------------------------------------------
Copyright (c) 2002 Andrew Green and Learning in Motion, Inc.
http://www.zoolib.org

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
COPYRIGHT HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
------------------------------------------------------------ */

#ifndef __ZStream_ZLib__
#define __ZStream_ZLib__ 1
#include "zconfig.h"
#include "ZCONFIG_API.h"
#include "ZCONFIG_SPI.h"

#ifndef ZCONFIG_API_Avail__Stream_ZLib
#       define ZCONFIG_API_Avail__Stream_ZLib ZCONFIG_SPI_Enabled(zlib)
#endif

#ifndef ZCONFIG_API_Desired__Stream_ZLib
#       define ZCONFIG_API_Desired__Stream_ZLib 1
#endif

#include "ZStreamer.h"

#if ZCONFIG_API_Enabled(Stream_ZLib)

#include <zlib.h>

// =================================================================================================
#pragma mark -
#pragma mark * ZStreamR_ZLibDecode


class ZStreamR_ZLibDecode : public ZStreamR
        {
public:
        ZStreamR_ZLibDecode(const ZStreamR& iStreamSource);
        ZStreamR_ZLibDecode(size_t iBufferSize, const ZStreamR& iStreamSource);
        ~ZStreamR_ZLibDecode();

// From ZStreamR
        virtual void Imp_Read(void* iDest, size_t iCount, size_t* oCountRead);
        virtual size_t Imp_CountReadable();

protected:
        void Internal_Init(size_t iBufferSize);

        const ZStreamR& fStreamSource;
        z_stream fState;
        Bytef* fBuffer;
        size_t fBufferSize;
        };

typedef ZStreamerR_FT<ZStreamR_ZLibDecode> ZStreamerR_ZLibDecode;

// =================================================================================================
#pragma mark -
#pragma mark * ZStreamW_ZLibEncode


class ZStreamW_ZLibEncode : public ZStreamW
        {
public:
        ZStreamW_ZLibEncode(int iCompressionLevel, const ZStreamW& iStreamSink);
        ZStreamW_ZLibEncode(int iCompressionLevel, size_t iBufferSize, const ZStreamW& iStreamSink);
        ~ZStreamW_ZLibEncode();

// From ZStreamW
        virtual void Imp_Write(const void* iSource, size_t iCount, size_t* oCountWritten);
        virtual void Imp_Flush();

protected:
        void Internal_Init(int iCompressionLevel, size_t iBufferSize);
        void Internal_Flush();

        const ZStreamW& fStreamSink;
        z_stream fState;
        Bytef* fBuffer;
        size_t fBufferSize;
        };

// =================================================================================================
#pragma mark -
#pragma mark * ZStreamerW_ZLibEncode


class ZStreamerW_ZLibEncode : public ZStreamerW
        {
public:
        ZStreamerW_ZLibEncode(int iCompressionLevel, ZRef<ZStreamerW> iStreamer);
        ZStreamerW_ZLibEncode(int iCompressionLevel, size_t iBufferSize, ZRef<ZStreamerW> iStreamer);

        virtual ~ZStreamerW_ZLibEncode();

// From ZStreamerW
        virtual const ZStreamW& GetStreamW();

protected:
        ZRef<ZStreamerW> fStreamer;
        ZStreamW_ZLibEncode fStream;
        };

// =================================================================================================

#endif // ZCONFIG_API_Enabled(Stream_ZLib)

#endif // __ZStream_ZLib__

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