lwpobjstrm.hxx

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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"
 
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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