fdword.h

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// FDword.h: interface for the CFDword class.
//
//////////////////////////////////////////////////////////////////////

#if !defined(AFX_FDWORD_H__FF01F7F6_C985_4B2D_BD75_C9AB9DF11CC6__INCLUDED_)
#define AFX_FDWORD_H__FF01F7F6_C985_4B2D_BD75_C9AB9DF11CC6__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

#include "BaseFunc.h"

class CFDword  
{
public:
	CFDword();
	virtual ~CFDword();
private:
	int		m_nOrder;	// 正序，逆序，偶数在前，奇数在前
	DWORD	m_dwSize;	// the size od block	
	DWORD*	m_pData;	// brock ptr
public:
	BOOL			Create(int nOrder, DWORD dwSize);
	static CFDword*	CreateNew(int nOrder, DWORD dwSize);// size is by dword
	void		SetValue(DWORD dwValue, int nIndex);
	DWORD	GetValue(int nIndex);

private:
	inline DWORD		Index2Order	(int nIndex);
	inline void			CheckOrder	(int nOrder);
	inline void			Encrypt		(DWORD& dwData, int nOrder);
	inline void			DecryptFile	(DWORD& dwData, int nOrder);
};

#endif // !defined(AFX_FDWORD_H__FF01F7F6_C985_4B2D_BD75_C9AB9DF11CC6__INCLUDED_)