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/*************************************************************************
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 *  Sun Microsystems Inc., October, 2000
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 *  GNU Lesser General Public License Version 2.1
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 *  Sun Industry Standards Source License Version 1.1
 *  =================================================
 *  The contents of this file are subject to the Sun Industry Standards
 *  Source License Version 1.1 (the "License"); You may not use this file
 *  except in compliance with the License. You may obtain a copy of the
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 ************************************************************************/
/*************************************************************************
 * @file
 *  For LWP filter architecture prototype
 ************************************************************************/
/*************************************************************************
 * Change History
 Jan 2005			Created
 ************************************************************************/


#ifndef _LWPOBJECTHEADER_HXX
#define _LWPOBJECTHEADER_HXX

#include "lwpobjid.hxx"
#include "lwpobjtags.hxx"
/**
 * @brief	Base class of all Lwp VO objects
*/
class LwpObjectHeader
{
public:
    LwpObjectHeader();
private:
    sal_uInt32 m_nTag;
    LwpObjectID m_ID;
    sal_uInt32 m_nSize;		//Data size
    sal_Bool m_bCompressed;

    //localize the following memebers to save memory
    //sal_uInt8 m_nFlagBits;
    //sal_uInt32 m_nVersionID;
    //sal_uInt32 m_nRefCount;
    //sal_uInt32 m_nNextVersionOffset;
    //sal_uInt32 m_nNextVersionID;
    //sal_uInt32 m_nHeaderSize;

    enum
    {
        VERSION_BITS			= 0x03,
        DEFAULT_VERSION			= 0x00,
        ONE_BYTE_VERSION		= 0x01,
        TWO_BYTE_VERSION		= 0x02,
        FOUR_BYTE_VERSION		= 0x03,

        REFCOUNT_BITS			= 0x0C,
        ONE_BYTE_REFCOUNT		= 0x04,
        TWO_BYTE_REFCOUNT		= 0x08,
        FOUR_BYTE_REFCOUNT		= 0x0C,

        SIZE_BITS				= 0x30,
        ONE_BYTE_SIZE			= 0x10,
        TWO_BYTE_SIZE			= 0x20,
        FOUR_BYTE_SIZE			= 0x30,

        HAS_PREVOFFSET			= 0x40,
        DATA_COMPRESSED		= 0x80
    };

public:
    void Read(LwpSvStream &pStrm);
    inline sal_uInt32 GetTag();
    inline sal_uInt32 GetSize();
    inline LwpObjectID* GetID();
    inline sal_Bool IsCompressed();
};

inline sal_uInt32 LwpObjectHeader::GetTag()
{
    return m_nTag;
}
inline sal_uInt32 LwpObjectHeader::GetSize()
{
    return m_nSize;
}
inline LwpObjectID* LwpObjectHeader::GetID()
{
    return &m_ID;
}
inline sal_Bool LwpObjectHeader::IsCompressed()
{
    return m_bCompressed;
}
#endif

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