[原创]解析mbr得到盘

可能以后编程的日子少了！这个代码是过年家里无网的日子写的！本打算整个工具！但是后面的NTFS解析是参照别人的代码！所以只给我写的得到盘已经盘得大小的代码发一下吧

#include <Windows.h>

#pragma pack(1)

struct DPT

{

	char chs[4];

	byte type;

	char chs1[3];

	DWORD dwSpp; //sectors preceding partition

	DWORD dwSip; //sectors in partition

};

struct MBR

{

	char code[446];

	DPT dpt[4];

	char sign[2];

};

#pragma pop(1)

class CGetHardDisk

{

public:

	BOOL GetDisk();

private:

BOOL TraverDisk(HANDLE hFile,LONGLONG topPosion,LONGLONG uDwSpp);

};

#include "GetHardDisk.h"

BOOL CGetHardDisk::GetDisk()

{

	BOOL bResult=FALSE;

	HANDLE hFile=INVALID_HANDLE_VALUE;

	hFile = CreateFile(TEXT("\\\\.\\PhysicalDrive0"),  // drive 

		GENERIC_READ|GENERIC_WRITE,                // no access to the drive

		FILE_SHARE_READ | // share mode

		FILE_SHARE_WRITE, 

		NULL,             // default security attributes

		OPEN_EXISTING,    // disposition

		0,                // file attributes

		NULL);            // do not copy file attributes

	if (hFile == INVALID_HANDLE_VALUE) // cannot open the drive

	{

		goto Finally;

	}

	DWORD num;

	LONGLONG topExt=0;

	MBR mbr={0};

	DWORD dwError;

	double dG=0;

	// Read the first sector (boot sector)

	if (!ReadFile(hFile, &mbr, 512, &num, NULL) || num!=512)

	{

		dwError=GetLastError();

		goto Finally;

	}

	LONGLONG lOffset=0;

	LONGLONG utest=0;

	int i=0;

	LARGE_INTEGER addr;

	LONGLONG test=512;

	DWORD len;

	for (i=0;i<4;i++)

	{

		if (mbr.dpt[i].type==0xf||mbr.dpt[i].type==5)

		{

			TraverDisk(hFile,mbr.dpt[1].dwSpp,0);

		}

		else if (mbr.dpt[i].type==0)

		{

			continue;

		}

		else

		{

			//当前硬盘的大小 以及偏移

			utest=mbr.dpt[i].dwSip;

			dG=(double)((utest*512)/(1.0*1024*1024*1024));

			lOffset=mbr.dpt[i].dwSpp;

		}

	}

	bResult=TRUE;

Finally:

	if (hFile!=INVALID_HANDLE_VALUE)

	{

		CloseHandle(hFile);

	}

	return bResult;

}

BOOL CGetHardDisk::TraverDisk(HANDLE hFile,LONGLONG topPosion,LONGLONG uDwSpp)

{

	BOOL bResult=FALSE;

	int i=0;

	DWORD num;

	LONGLONG lOffset=0;

	LONGLONG utest=0;

	MBR mbr={0};

	double dG=0;

	LARGE_INTEGER addr;

	DWORD len=0;

	addr.QuadPart=(uDwSpp+topPosion)*512;

	len = SetFilePointer(hFile,addr.LowPart, &addr.HighPart, FILE_BEGIN);

	if (len == (DWORD)-1 && GetLastError() != NO_ERROR)

	{

		goto Finally;

	}

	if (!ReadFile(hFile,&mbr,512, &len, NULL))

	{

		goto Finally;

	}

	for (i=0;i<4;i++)

	{

		if (mbr.dpt[i].type==0xf||mbr.dpt[i].type==5)

		{

			TraverDisk(hFile,topPosion,mbr.dpt[i].dwSpp);

		}

		else if (mbr.dpt[i].type==0)

		{

			continue;

		}

		else

		{

			//当前硬盘的大小 以及偏移

			utest=mbr.dpt[i].dwSip;

			dG=(double)((utest*512)/(1.0*1024*1024*1024));

			lOffset=uDwSpp+topPosion+mbr.dpt[i].dwSpp;

		}

	}

	bResult=TRUE;

Finally:

	return bResult;

}

#include <windows.h>

#include "GetHardDisk.h"

void main()

{

CGetHardDisk getDisk;

getDisk.GetDisk();

}