writeread.cpp

一个可对磁盘扇道直接进行读写操作的程序

// WriteRead.cpp: implementation of the CWriteRead class.
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "WriteRead.h"

#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

CWriteRead::CWriteRead()
{

}

CWriteRead::~CWriteRead()
{

}

BOOL CWriteRead::WriteSectors(BYTE bDrive,DWORD dwStart,WORD wSectors,LPCVOID lpBuff)
{ 
	if(bDrive==0)
		return 0;
	char devName[]="\\\\.\\A:";
	devName[4]='A'+bDrive-1;
	HANDLE hDev=CreateFile(devName,GENERIC_WRITE,FILE_SHARE_WRITE,NULL,OPEN_EXISTING,0,NULL);
	if(hDev==INVALID_HANDLE_VALUE)
		return 0;
	SetFilePointer(hDev,512*dwStart,0,FILE_BEGIN);
	DWORD dwNum;
	BOOL bRet=WriteFile(hDev,lpBuff,512*wSectors,&dwNum,NULL);
	CloseHandle(hDev);
	return(bRet);
}

BOOL CWriteRead::ReadSectors(BYTE bDrive, DWORD dwStart, WORD wSectors, LPVOID lpBuff)
{  
	if(bDrive==0)
    return 0;
	char devName[]="\\\\.\\A:";
	devName[4]='A'+bDrive-1;
	HANDLE hDev=CreateFile(devName,GENERIC_READ,FILE_SHARE_WRITE,NULL,OPEN_EXISTING,0,NULL);
	if(hDev==INVALID_HANDLE_VALUE)
		return 0;
	SetFilePointer(hDev,512*dwStart,0,FILE_BEGIN);
	DWORD dwNum;
    BOOL bRet=ReadFile(hDev,lpBuff,512*wSectors,&dwNum,NULL);
    CloseHandle(hDev);
	return(bRet);
}