//-------------- Rotinas
public DVDRomReader(Char drive)
{
context = IOManager.CreateIOContext("DVD-ROM " + drive, @"\\.\" + drive + ':', FileAccess.Read, FileShare.Read, 0,
FileMode.Open, EFileAttributes.NoBuffering);
context.Lock();
DISK_GEOMETRY dg = context.GetDiskGeometry();
sectorSize = (int)dg.BytesPerSector;
PARTITION_INFORMATION pi = context.GetPartitionInformation();
size = pi.PartitionLength;
context.Unlock();
}
//--------------- Lê a Geometria do disco
public DISK_GEOMETRY GetDiskGeometry()
{
DISK_GEOMETRY dg = new DISK_GEOMETRY();
int bytes = 0;
if (!lockedByMe)
{
result = (int)IORet.RET_IO_UNLOCKED;
Log.SendMessage(name, (int)IORet.RET_IO_UNLOCKED, null, LogMessageType.Error);
return(dg);
}
//--------- Determina a geometria do disco
if (DeviceIoControl(handle.handle, IOManager.IOCTL_DISK_GET_DRIVE_GEOMETRY, IntPtr.Zero, 0, ref dg,
Marshal.SizeOf(dg), ref bytes, 0) == 0)
{
//Loga erro
result = Marshal.GetLastWin32Error();
Log.SendMessage(name, (int)IORet.RET_IO_NATIVEERROR, result, LogMessageType.Error);
}
return(dg);
}
private static extern int DeviceIoControl(int hDevice, uint dwIoControlCode, IntPtr InBuffer, int nInBufferSize,
ref DISK_GEOMETRY OutBuffer, int nOutBufferSize, ref int pBytesReturned, int lpOverlapped);
