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 *  Sun Industry Standards Source License Version 1.1
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/*************************************************************************
 * @file
 *  object stream header file
 *  stream for one LwpObject body data
 ************************************************************************/
/*************************************************************************
 * Change History
 Jan 2005           Created
 ************************************************************************/

#ifndef _LWPOBJECTSTREAM_HXX
#define _LWPOBJECTSTREAM_HXX

#include "lwpheader.hxx"
#include "lwpsvstream.hxx"
/**
 * @brief   stream class for LwpObject body data
 *          provide stream like interface to read object data
*/
class LwpObjectStream
{
public:
    LwpObjectStream(LwpSvStream *pStrm, sal_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
    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;
    sal_Bool m_bCompressed;
public:
    sal_uInt16 QuickRead(void* buf, sal_uInt16 len);
    sal_uInt16 GetPos() { return m_nReadPos; }
    void SeekRel(sal_uInt16 pos);
    sal_Bool Seek( sal_uInt16 pos);
    void SkipExtra();
    sal_uInt16 CheckExtra();

    sal_Bool QuickReadBool(bool *pFailure=NULL);
    sal_uInt32 QuickReaduInt32(bool *pFailure=NULL);
    sal_uInt16 QuickReaduInt16(bool *pFailure=NULL);
    sal_uInt8 QuickReaduInt8(bool *pFailure=NULL);
    sal_Int32 QuickReadInt32(bool *pFailure=NULL);
    sal_Int16 QuickReadInt16(bool *pFailure=NULL);
    double QuickReadDouble(bool *pFailure=NULL);

    OUString QuickReadStringPtr();
    void QuickReadStringWithMax(unsigned char * pString, sal_uInt16 MaxLen);

public:
    void ReadComplete();
    LwpSvStream *GetStream();
private:
    void ReadStream();
    void Read2Buffer();
    sal_uInt8* AllocBuffer(sal_uInt16 size);
    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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