src/stream/ZStream_Memory.h

/*  @(#) $Id: ZStream_Memory.h,v 1.7 2006/04/27 03:19:32 agreen Exp $ */

/* ------------------------------------------------------------
Copyright (c) 2004 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_Memory__
#define __ZStream_Memory__ 1

#include "zconfig.h"

#include "ZStreamer.h"

// =================================================================================================
#pragma mark -
#pragma mark * ZStreamR_Memory


class ZStreamR_Memory : public ZStreamR
        {
public:
        ZStreamR_Memory(const void* iAddress);

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

        virtual void Imp_CopyToDispatch(const ZStreamW& iStreamW, uint64 iCount,
                uint64* oCountRead, uint64* oCountWritten);

        virtual void Imp_CopyTo(const ZStreamW& iStreamW, uint64 iCount,
                uint64* oCountRead, uint64* oCountWritten);

        virtual void Imp_Skip(uint64 iCount, uint64* oCountSkipped);

// Our protocol
        const void* GetCurrentAddress();

protected:
        void pCopyTo(const ZStreamW& iStreamW, uint64 iCount,
                uint64* oCountRead, uint64* oCountWritten);

        const char* fAddress;
        };

typedef ZStreamerR_T<ZStreamR_Memory> ZStreamerR_Memory;

// =================================================================================================
#pragma mark -
#pragma mark * ZStreamRPos_Memory


class ZStreamRPos_Memory : public ZStreamRPos
        {
public:
        ZStreamRPos_Memory(const void* iAddress, size_t iSize);
        ZStreamRPos_Memory(const std::pair<const void*, size_t>& iParam);

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

        virtual void Imp_CopyToDispatch(const ZStreamW& iStreamW, uint64 iCount,
                uint64* oCountRead, uint64* oCountWritten);

        virtual void Imp_CopyTo(const ZStreamW& iStreamW, uint64 iCount,
                uint64* oCountRead, uint64* oCountWritten);

        virtual void Imp_Skip(uint64 iCount, uint64* oCountSkipped);

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

        virtual uint64 Imp_GetSize();

// Our protocol
        const void* GetCurrentAddress();

protected:
        void pCopyTo(const ZStreamW& iStreamW, uint64 iCount,
                uint64* oCountRead, uint64* oCountWritten);

        const char* fAddress;
        uint64 fPosition;
        size_t fSize;
        };

// =================================================================================================
#pragma mark -
#pragma mark * ZStreamerRPos_Memory


class ZStreamerRPos_Memory : public ZStreamerRPos
        {
public:
        ZStreamerRPos_Memory(const void* iAddress, size_t iSize);
        virtual ~ZStreamerRPos_Memory();

// From ZStreamerRPos
        virtual const ZStreamRPos& GetStreamRPos();

// Our protocol
        const void* GetCurrentAddress();

protected:
        ZStreamRPos_Memory fStream;
        };

// Alternate template-based definition:
// typedef ZStreamerRPos_T<ZStreamRPos_Memory> ZStreamerRPos_Memory;

// =================================================================================================
#pragma mark -
#pragma mark * ZStreamW_Memory


class ZStreamW_Memory : public ZStreamW
        {
public:
        ZStreamW_Memory(void* iAddress);

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

        virtual void Imp_CopyFromDispatch(const ZStreamR& iStreamR, uint64 iCount,
                uint64* oCountRead, uint64* oCountWritten);

        virtual void Imp_CopyFrom(const ZStreamR& iStreamR, uint64 iCount,
                uint64* oCountRead, uint64* oCountWritten);

// Our protocol
        void* GetCurrentAddress();

protected:
        void pCopyFrom(const ZStreamR& iStreamR, uint64 iCount,
                uint64* oCountRead, uint64* oCountWritten);

        char* fAddress;
        };

typedef ZStreamerW_T<ZStreamW_Memory> ZStreamerW_Memory;

// =================================================================================================
#pragma mark -
#pragma mark * ZStreamWPos_Memory


class ZStreamWPos_Memory : public ZStreamWPos
        {
public:
        ZStreamWPos_Memory(void* iAddress, size_t iSize);
        ZStreamWPos_Memory(void* iAddress, size_t iSize, size_t iCapacity);

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

        virtual void Imp_CopyFromDispatch(const ZStreamR& iStreamR, uint64 iCount,
                uint64* oCountRead, uint64* oCountWritten);

        virtual void Imp_CopyFrom(const ZStreamR& iStreamR, uint64 iCount,
                uint64* oCountRead, uint64* oCountWritten);

// From ZStreamWPos
        virtual uint64 Imp_GetPosition();
        virtual void Imp_SetPosition(uint64 iPosition);

        virtual uint64 Imp_GetSize();
        virtual void Imp_SetSize(uint64 iSize);

// Our protocol
        void* GetCurrentAddress();

protected:
        void pCopyFrom(const ZStreamR& iStreamR, uint64 iCount,
                uint64* oCountRead, uint64* oCountWritten);

        char* fAddress;
        uint64 fPosition;
        size_t fSize;
        size_t fCapacity;
        };

// =================================================================================================
#pragma mark -
#pragma mark * ZStreamerWPos_Memory


class ZStreamerWPos_Memory : public ZStreamerWPos
        {
public:
        ZStreamerWPos_Memory(void* iAddress, size_t iSize);
        ZStreamerWPos_Memory(void* iAddress, size_t iSize, size_t iCapacity);
        virtual ~ZStreamerWPos_Memory();

// From ZStreamerWPos
        virtual const ZStreamWPos& GetStreamWPos();

// Our protocol
        void* GetCurrentAddress();

protected:
        ZStreamWPos_Memory fStream;
        };

// Alternate template-based definition:
// typedef ZStreamerW_T<ZStreamWPos_Memory> ZStreamerWPos_Memory;

#endif // __ZStream_Memory__

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