D:/Zythum/DinoKod/Common/Lzw.h

//---------------------------------------------------------------------------------------------
//      This file is a part of "DinoKod".
//      Copyright © 2003 Dino Productions. All Rights Reserved.
//      
//      File                    : Lzw.h
//      Author                  : Sebastien LEIX        sebastien.leix@wanadoo.fr
//      Date                    : 01/01/2003
//      Modification    :
//
//---------------------------------------------------------------------------------------------
#ifndef __LZW_H__
#define __LZW_H__

#include "Common/CommonDll.h"
#include "Common/Types.h"

#define LZW_DICTIONNARY_SIZE    2048
#define LZW_NBITS                               9
#define LZW_MAX_VALUE                   ((1 << LZW_NBITS) - 1)
#define LZW_MAX_CODE                    (LZW_MAX_VALUE - 1)

//--------------------------------------------------------------------------------------------------------------------------
class COMMON_API KLZW
{
protected:
        u8              m_pDictionnary[LZW_DICTIONNARY_SIZE];
        s32             m_nDictionnary;
        u32             m_Bit;
        s32             m_nBit;

        void    Flush();
        void    Output( u8* pBufferOut, s32& OutSize, s32 MaxSize, s32 Code );
        s32             Input( u8* pBufferIn, s32 Size, s32 &Pos );
        void    AddBufferToDictionnary( u8* pBuffer, s32 Size );
        bool    IsStringIsInDictionnary( u8* pBuffer, s32 Size );
        s32             GetCode( u8* pBuffer, s32 Size );
        s32             GetBuffer( s32 Code, u8* pBuffer );

public:
        KLZW();
        ~KLZW();

        void    Compress( u8* pBuffer, s32 Size, u8* pOutBuffer, s32* pOutSize );
        void    Expand( u8* pBuffer, s32 Size, u8* pOutBuffer, s32* pOutSize );

};

extern COMMON_API KLZW  g_Lzw;

#endif  __LZW_H__

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