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Posted 17 Dec 2001

CRC32: Generating a checksum for a file

, 17 Dec 2001
How to generate a CRC32 based on a file
#ifndef _CRC32DYNAMIC_H_
#define _CRC32DYNAMIC_H_

#include "Common.h"

class CCrc32Dynamic
	virtual ~CCrc32Dynamic();

	void Init(void);
	void Free(void);

	DWORD StringCrc32(LPCTSTR szString, DWORD &dwCrc32) const;
	DWORD FileCrc32Streams(LPCTSTR szFilename, DWORD &dwCrc32) const;
	DWORD FileCrc32Win32(LPCTSTR szFilename, DWORD &dwCrc32) const;
	DWORD FileCrc32Filemap(LPCTSTR szFilename, DWORD &dwCrc32) const;
	DWORD FileCrc32Assembly(LPCTSTR szFilename, DWORD &dwCrc32) const;

	static bool GetFileSizeQW(const HANDLE hFile, QWORD &qwSize);
	inline void CalcCrc32(const BYTE byte, DWORD &dwCrc32) const;

	DWORD *m_pdwCrc32Table;


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About the Author

Brian Friesen
Web Developer
United States United States
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