viostream.h

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/*
Copyright c1997-2014 Trygve Isaacson. All rights reserved.
This file is part of the Code Vault version 4.1
http://www.bombaydigital.com/
License: MIT. See LICENSE.md in the Vault top level directory.
*/

#ifndef viostream_h
#define viostream_h

#include "vtypes.h"

class VStream;

class VIOStream {
    public:

        VIOStream(VStream& rawStream);
        virtual ~VIOStream() {}

        void readGuaranteed(Vu8* targetBuffer, Vs64 numBytesToRead);
        Vu8 readGuaranteedByte();
        Vs64 read(Vu8* targetBuffer, Vs64 numBytesToRead);

        Vs64 write(const Vu8* buffer, Vs64 numBytesToWrite);
        void flush();

        bool skip(Vs64 numBytesToSkip);
        bool seek(Vs64 offset, int whence);
        bool seek0();
        Vs64 getIOOffset() const;
        Vs64 available() const;

        VStream& getRawStream();


        static Vs16 streamCompare(VIOStream& streamA, VIOStream& streamB, Vs64 numBytesToCompare);

    protected:

        VStream& mRawStream;    

    private:

        // Prevent copy construction and assignment since there is no provision for sharing a raw stream.
        VIOStream(const VIOStream& other);
        VIOStream& operator=(const VIOStream& other);
};

#endif /* viostream_h */