src/stream/ZStreamRPos_StreamR.h

/*  @(#) $Id: ZStreamRPos_StreamR.h,v 1.4 2006/04/27 03:19:32 agreen Exp $ */

/* ------------------------------------------------------------
Copyright (c) 2001 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 __ZStreamRPos_StreamR__
#define __ZStreamRPos_StreamR__ 1
#include "zconfig.h"

#include "ZStream.h"

// =================================================================================================
#pragma mark -
#pragma mark * ZStreamRPos_StreamR

class ZStreamRPos_StreamR : public ZStreamRPos
        {
public:
        ZStreamRPos_StreamR(const ZStreamR& iSource, const ZStreamRWPos& iBuffer);
        ~ZStreamRPos_StreamR();

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

// From ZStreamRPos
        virtual size_t Imp_CountReadable();
        virtual uint64 Imp_GetPosition();
        virtual void Imp_SetPosition(uint64 iPosition);
        virtual uint64 Imp_GetSize();

// Our protocol
        const ZStreamR& Committed();

protected:
        const ZStreamR& fSource;
        const ZStreamRWPos& fBuffer;
        bool fCommitted;
        };

#endif // __ZStreamRPos_StreamR__

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