/// <summary>
/// Refreshes the logical device.
/// </summary>
public void Refresh()
{
bootSector = null;
data = new UInt16[0];
// Jump to FAT partition
DeviceStream.Seek(partition.RelativeSector * PhysicalDevice.SectorSize, SeekOrigin.Begin);
if (!partition.IsFAT)
{
return;
}
// Boot sector
bootSector = (BootSector)StreamActivator.CreateInstance(typeof(BootSector), DeviceStream);
DeviceStream.Seek(448, SeekOrigin.Current);
// Failsafe .. be sure FAT partition table is valid
if ((DeviceStream.ReadByte() != 0x55) || (DeviceStream.ReadByte() != 0xAA))
{
bootSector = null;
return;
}
// Get FAT sector
BinaryReader br = new BinaryReader(DeviceStream);
data = new UInt16[bootSector.NumberOfFATs * ((bootSector.SectorsPerFAT * PhysicalDevice.SectorSize) / 2)];
for (int i = 0; i < data.Length; i++)
{
data[i] = br.ReadUInt16();
}
}
/// <summary>
/// Refreshes the device.
/// </summary>
public void Refresh()
{
if (deviceStream == null)
{
return;
}
logicalDevices = null;
ArrayList logicalDeviceList = new ArrayList();
deviceStream.Seek(0, SeekOrigin.Begin);
BinaryReader br = new BinaryReader(deviceStream);
// Read the MBR
byte[] sector = br.ReadBytes(SectorSize);
// Failsafe .. be sure MBR is vaild
if ((sector[0x01FE] != 0x55) || (sector[0x01FF] != 0xAA))
{
Console.WriteLine("Corrupt MBR; exiting");
return;
}
// Partition table
int p = 0x01BE; // Beginning of partition table
for (int i = 0; i < 4; i++, p += 16)
{
PartitionTable partition = (PartitionTable)StreamActivator.CreateInstance(typeof(PartitionTable), sector, p);
if (partition.SysId == 0)
{
continue;
}
logicalDeviceList.Add(new LogicalDevice(this, partition));
}
logicalDevices = (LogicalDevice[])logicalDeviceList.ToArray(typeof(LogicalDevice));
}
/// <summary>
/// Enumerates the file entries contained in the current directory.
/// </summary>
private FileEntry[] EnumerateFileEntries(uint clusterNumber, bool includeFiles, bool includeDirectories, bool deleted, bool currentOnly, bool parentOnly)
{
ArrayList files = new ArrayList();
uint sector = (uint)(device.RootDirectorySector + ((((clusterNumber == 0) ? (0) : (clusterNumber + 2))) * device.BootSector.SectorsPerCluster));
// Jump to next directory sector
DeviceStream.Seek((device.Partition.RelativeSector + sector) * device.BootSector.BytesPerSector, SeekOrigin.Begin);
while (true)
{
FileEntry file = (FileEntry)StreamActivator.CreateInstance(typeof(FileEntry), DeviceStream);
if (file.FileAttributes == FileAttributes.LongFileName)
{
continue;
}
if (file.Name[0] == 0x00)
{
break; // No more entries
}
if (currentOnly)
{
if ((clusterNumber == 0) && ((file.FileAttributes & FileAttributes.VolumeId) != 0))
{
files.Add(file);
}
else if (file.Name == ". ")
{
files.Add(file);
}
continue;
}
if (parentOnly)
{
if (file.Name == ".. ")
{
files.Add(file);
}
continue;
}
// Skip the volume id
if ((file.FileAttributes & FileAttributes.VolumeId) != 0)
{
continue;
}
// Skip deleted/non-deleted entries
if ((file.Name[0] == '?') != deleted)
{
continue;
}
// Show info
bool isDirectory = ((file.FileAttributes & FileAttributes.Directory) != 0);
if ((isDirectory) && (!includeDirectories))
{
continue;
}
if ((!isDirectory) && (!includeFiles))
{
continue;
}
files.Add(file);
}
return((FileEntry[])files.ToArray(typeof(FileEntry)));
}
