EFAT.cpp

#include "EFAT.h"
#include <iostream>
#include "windows.h"
#include "stdio.h"
using namespace std;

bool EFAT::ReadClusterSize()
{
    BYTE sector[512];
    DWORD bytesRead;
    DWORD bytesToRead = sizeof(sector);

    LARGE_INTEGER sectorSizeOffset;
    sectorSizeOffset.QuadPart = 0;

    if (!SetFilePointerEx(fileHandler, sectorSizeOffset, NULL, FILE_BEGIN)) {
        throw std::invalid_argument("Set FilePointer error");
        CloseHandle(fileHandler);
        return false;
    }
    if (!ReadFile(fileHandler, sector, bytesToRead, &bytesRead, NULL))
    {
        throw std::invalid_argument("ReadFile error");
        CloseHandle(fileHandler);
        return false;
    }
    unsigned int sectorSize = pow (2, sector[108]); //ðàçìåð ñåêòîðà
    unsigned int classCoeff = pow (2, sector[109]); //êëàñòåðíûé ìíîæèòåëü
    clusterSize = sectorSize * classCoeff;
    return true;
}