#include?“StdAfx.h“

#include?“filecrc.h“


#define?MAX_VIEW_SIZE	0x00A00000		//10M



//bool?CFileCrc::CheckSum（CMemMapFile?&file?DWORD?&crcContent）
//{
//	LPVOID?lpData?=?file.Open（）;
//	DWORD?size?=?file.GetLength（）;
//	bool?ret?=?false;
//?	if?（lpData）
//?	{
//?		ret?=?CheckSum（lpData?size?crcContent）;
//?	}
//?	else
//?	{
//?		ret?=?false;
//?	}
//?	file.Close（）;
//?
//?	return?ret;
//}


bool?CFileCrc::CheckSum（LPSTR?pszFileDWORD?&crcContent）
{
	bool?ret?=?false;

	struct?ACCUMULATE_CRC
	{
		bool?bFirstCrc;
		DWORD?crc;
	}?acCrc?=?{?true?0};;
	BYTE*?pByte?=?NULL;
	void*?dwMemAddress?=?NULL;
	DWORD?dwFileSize?=?0?dwViewSize?=?0;
	DWORD?dwFileOffset?=?0;



	HANDLE?hFile??=?CreateFile（pszFile
		GENERIC_READ
		FILE_SHARE_READ
		NULL
		OPEN_EXISTING
		FILE_ATTRIBUTE_NORMAL
		NULL）;
????if（hFile?==?INVALID_HANDLE_VALUE）{	goto?END;}

	HANDLE?hFilemap?=?CreateFileMappingA（hFile
		NULL
		PAGE_READONLY
		0
		0
		NULL）;
	if（hFilemap?==?NULL）{	goto?END;}


	dwFileSize?=?GetFileSize（hFile?NULL）;
	if（dwFileSize?==?0）?{	goto?END;	}

	//?Loop?while?we?map?a?section?of?the?file?and?CRC?it
	while（dwFileSize?>?0）
	{
		if（dwFileSize?		else	{dwViewSize?=?MAX_VIEW_SIZE;	}

		dwMemAddress?=?MapViewOfFile（hFilemap
			FILE_MAP_READ
			0
			dwFileOffset
			dwViewSize）;

		pByte?=?（BYTE*）dwMemAddress;
		if（pByte?==?NULL）	{	goto?END;	}

		if（acCrc.bFirstCrc）
		{
			acCrc.crc?=?crc32::checksum（pByte?dwViewSize）;
			acCrc.bFirstCrc?=?false;
		}
		else
		{
			acCrc.crc?=?crc32::accumulatesum（pByte?dwViewSize?acCrc.crc）;
		}

		if（!UnmapViewOfFile（（void*）dwMemAddress））	{	goto?END;	}

		dwFileOffset?+=?dwViewSize;
		dwFileSize?-=?dwViewSize;
	}

	crcContent?=?acCrc.crc;
	ret?=?true;

END:

	if（hFile?!=?NULL）?CloseHandle（hFile）;
	if（hFilemap?!=?NULL）?CloseHandle（hFilemap）;

	return?ret;
}



bool?CFileCrc::CheckSum（const?void?*pBuffer?
							?DWORD?len
							?DWORD?&dwResult）
{
	assert（pBuffer?&&?len?>=?4）;
	dwResult?=?crc32::checksum（pBuffer?len）;
	return?true;
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件????????991??2006-12-22?11:36??mapfilecrc\.svn\text-base\mapfilecrc.sln.svn-base

?????目錄??????????0??2006-12-22?11:36??mapfilecrc\.svn\text-base

?????目錄??????????0??2006-12-22?11:36??mapfilecrc\.svn\prop-base

?????目錄??????????0??2006-12-22?11:36??mapfilecrc\.svn\props

?????目錄??????????0??2006-12-22?11:36??mapfilecrc\.svn\tmp\text-base

?????目錄??????????0??2006-12-22?11:36??mapfilecrc\.svn\tmp\prop-base

?????目錄??????????0??2006-12-22?11:36??mapfilecrc\.svn\tmp\props

?????目錄??????????0??2006-12-22?11:36??mapfilecrc\.svn\tmp

?????文件??????????2??2006-12-22?11:36??mapfilecrc\.svn\format

?????文件????????244??2006-12-22?13:19??mapfilecrc\.svn\all-wcprops

?????文件????????400??2006-12-28?09:13??mapfilecrc\.svn\entries

????...D.H.?????????0??2006-12-22?11:36??mapfilecrc\.svn

?????文件????????394??2006-12-22?11:36??mapfilecrc\mapfilecrc\.svn\text-base\stdafx.h.svn-base

?????文件???????8454??2006-12-22?11:36??mapfilecrc\mapfilecrc\.svn\text-base\crc32.h.svn-base

?????文件???????3881??2006-12-22?11:36??mapfilecrc\mapfilecrc\.svn\text-base\mapfilecrc.vcproj.svn-base

?????文件???????2170??2006-12-22?11:36??mapfilecrc\mapfilecrc\.svn\text-base\filecrc.cpp.svn-base

?????文件????????297??2006-12-22?11:36??mapfilecrc\mapfilecrc\.svn\text-base\stdafx.cpp.svn-base

?????文件?????????68??2006-12-22?11:36??mapfilecrc\mapfilecrc\.svn\text-base\mapfilecrc.h.svn-base

?????文件????????254??2006-12-22?11:38??mapfilecrc\mapfilecrc\.svn\text-base\mapfilecrc.cpp.svn-base

?????文件????????305??2006-12-22?11:48??mapfilecrc\mapfilecrc\.svn\text-base\filecrc.h.svn-base

?????目錄??????????0??2006-12-22?11:36??mapfilecrc\mapfilecrc\.svn\text-base

?????目錄??????????0??2006-12-22?11:36??mapfilecrc\mapfilecrc\.svn\prop-base

?????目錄??????????0??2006-12-22?11:36??mapfilecrc\mapfilecrc\.svn\props

?????目錄??????????0??2006-12-22?11:36??mapfilecrc\mapfilecrc\.svn\tmp\text-base

?????目錄??????????0??2006-12-22?11:36??mapfilecrc\mapfilecrc\.svn\tmp\prop-base

?????目錄??????????0??2006-12-22?11:36??mapfilecrc\mapfilecrc\.svn\tmp\props

?????目錄??????????0??2006-12-22?11:36??mapfilecrc\mapfilecrc\.svn\tmp

?????文件??????????2??2006-12-22?11:36??mapfilecrc\mapfilecrc\.svn\format

?????文件???????1254??2006-12-22?13:19??mapfilecrc\mapfilecrc\.svn\all-wcprops

?????文件???????1245??2006-12-28?09:13??mapfilecrc\mapfilecrc\.svn\entries

............此處省略23個文件信息