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/*************************************************************************

 * @file

 *  object stream header file

 *  stream for one LwpObject body data

 ************************************************************************/

#ifndef INCLUDED_LOTUSWORDPRO_INC_LWPOBJSTRM_HXX

#define INCLUDED_LOTUSWORDPRO_INC_LWPOBJSTRM_HXX

#include <config_lgpl.h>

#include <rtl/ustring.hxx>

#include <vector>

#include "lwpsvstream.hxx"

/**

 * @brief   stream class for LwpObject body data

 *          provide stream like interface to read object data

*/

class LwpObjectStream

{

public:

    LwpObjectStream(LwpSvStream* pStrm, bool isCompressed, sal_uInt16 size);

    ~LwpObjectStream();

private:

    sal_uInt8* m_pContentBuf; //The content buffer of the object

    sal_uInt8 m_SmallBuffer[100]; //To avoid frequent new

    std::vector<sal_uInt8> m_BigBuffer; //otherwise use this

    enum

    {

        IO_BUFFERSIZE = 0xFF00 //Refer to LWP, not sure if it is enough

    };

    sal_uInt16 m_nBufSize; //The total size of m_pContentBuf

    sal_uInt16 m_nReadPos; //The position of the quick read

    LwpSvStream* m_pStrm;

    bool m_bCompressed;

public:

    sal_uInt16 remainingSize() const;

    sal_uInt16 QuickRead(void* buf, sal_uInt16 len);

    sal_uInt16 GetPos() const { return m_nReadPos; }

    void SeekRel(sal_uInt16 pos);

    void Seek(sal_uInt16 pos);

    void SkipExtra();

    sal_uInt16 CheckExtra();

    bool QuickReadBool();

    sal_uInt32 QuickReaduInt32(bool* pFailure = nullptr);

    sal_uInt16 QuickReaduInt16(bool* pFailure = nullptr);

    sal_uInt8 QuickReaduInt8(bool* pFailure = nullptr);

    sal_Int32 QuickReadInt32();

    sal_Int16 QuickReadInt16();

    double QuickReadDouble();

    OUString QuickReadStringPtr();

    void ReadComplete();

    LwpSvStream* GetStream();

private:

    void Read2Buffer();

    sal_uInt8* AllocBuffer(sal_uInt16 size);

    static sal_uInt16 DecompressBuffer(sal_uInt8* pDst, sal_uInt8* pSrc, sal_uInt16 Size);

    void ReleaseBuffer();

};

inline LwpSvStream* LwpObjectStream::GetStream() { return m_pStrm; }

#endif

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