コード例 #1
0
 public Partition(string name)
 {
     this.name       = name;
     bootSector      = SectorReader.BSreader(name); //BS maker
     firstDataSector = bootSector.FATsize * bootSector.FATcount + bootSector.reserved;
 }
コード例 #2
0
ファイル: Sector Reader.cs プロジェクト: mirsaeedi/FAT-Gopher
        public static unsafe BootSector BSreader(string volName)
        {
            SafeFileHandle handle = WindowsAPI.CreateFile
                                    (
                @"\\.\" + volName,
                WindowsAPI.GENERIC_READ,
                WindowsAPI.FILE_SHARE_WRITE | WindowsAPI.FILE_SHARE_READ,
                0,
                WindowsAPI.OPEN_EXISTING,
                0,
                0);

            UInt32 error = WindowsAPI.GetLastError();

            byte[] buffer = new byte[512];
            int    n      = 0;
            byte   read   = 0;

            BootSector myBS = new BootSector();

            if (!handle.IsInvalid)
            {
                WindowsAPI.OverLapped over = new WindowsAPI.OverLapped();
                over.handle            = IntPtr.Zero;
                over.offset.offset     = 0;
                over.offset.offsetHigh = 0;

                fixed(byte *p = buffer)
                {
                    read  = WindowsAPI.ReadFile(handle, p, 512, &n, 0);
                    error = WindowsAPI.GetLastError();

                    for (int i = 3; i < 11; i++)
                    {
                        myBS.OEMname += (char)buffer[i];
                    }

                    uint pow = 1;
                    uint sum = 0;

                    for (int i = 11; i <= 12; i++)
                    {
                        sum += pow * buffer[i];
                        pow *= 256;
                    }

                    myBS.BPS = sum;

                    pow = 1;
                    sum = 0;
                    for (int i = 13; i <= 13; i++)
                    {
                        sum += pow * buffer[i];
                        pow *= 256;
                    }

                    myBS.SPC = sum;

                    pow = 1;
                    sum = 0;
                    for (int i = 14; i <= 15; i++)
                    {
                        sum += pow * buffer[i];
                        pow *= 256;
                    }

                    myBS.reserved = sum;

                    pow = 1;
                    sum = 0;
                    for (int i = 16; i <= 16; i++)
                    {
                        sum += pow * buffer[i];
                        pow *= 256;
                    }

                    myBS.FATcount = sum;

                    pow = 1;
                    sum = 0;
                    for (int i = 21; i <= 21; i++)
                    {
                        sum += pow * buffer[i];
                        pow *= 256;
                    }

                    myBS.media = sum;

                    pow = 1;
                    sum = 0;
                    for (int i = 24; i <= 25; i++)
                    {
                        sum += pow * buffer[i];
                        pow *= 256;
                    }

                    myBS.SPT = sum;

                    pow = 1;
                    sum = 0;
                    for (int i = 32; i <= 35; i++)
                    {
                        sum += pow * buffer[i];
                        pow *= 256;
                    }

                    myBS.Totalsector = sum;

                    pow = 1;
                    sum = 0;
                    for (int i = 28; i <= 31; i++)
                    {
                        sum += pow * buffer[i];
                        pow *= 256;
                    }

                    myBS.hiddenSector = sum;

                    pow = 1;
                    sum = 0;
                    for (int i = 36; i <= 39; i++)
                    {
                        sum += pow * buffer[i];
                        pow *= 256;
                    }

                    myBS.FATsize = sum;

                    pow = 1;
                    sum = 0;
                    for (int i = 44; i < 47; i++)
                    {
                        sum += pow * buffer[i];
                        pow *= 256;
                    }

                    myBS.RootClus = sum;

                    pow = 1;
                    sum = 0;
                    for (int i = 64; i <= 64; i++)
                    {
                        sum += pow * buffer[i];
                        pow *= 256;
                    }

                    myBS.driveNum = sum;

                    pow = 1;
                    sum = 0;
                    for (int i = 67; i <= 70; i++)
                    {
                        sum += pow * buffer[i];
                        pow *= 256;
                    }

                    myBS.volumeID = sum;

                    pow = 1;
                    sum = 0;
                    for (int i = 71; i < 82; i++)
                    {
                        myBS.volLabel += (char)buffer[i];
                    }
                }
            }

            return(myBS);
        }