//
public ulong SeekU(ulong offset, SeekOrigin origin)
{
ulong n = 0;
if (!DeviceIO.SetFilePointerEx(this.fileHandle, offset, out n, (uint)origin))
{
Marshal.ThrowExceptionForHR(Marshal.GetHRForLastWin32Error());
}
return(n);
}
/// <summary>
/// Function to Write Data Pattern that is in buffer to disk sectors
/// </summary>
/// <param name="writeBuffer">The buffer that has the pattern of data to write</param>
/// <param name="writeOffset">The byte offset in writeBuffer from which to begin copying bytes to the stream</param>
/// <param name="writeCount">The maximum number of bytes to write</param>
/// <returns></returns>
public unsafe void Write(byte[] writeBuffer, uint writeOffset, uint writeCount)
{
uint BytesWritten = 0;
UInt64 newFilePtr = 0;
long sectorStart = -1;
long sectorEnd = -1;
while (true)
{
Console.WriteLine("Enter start sector to overwrite from : ");
Wipe.sectorStart = Convert.ToUInt64(Console.ReadLine());
Console.WriteLine("\nEnter end sector to write till : ");
Wipe.sectorEnd = Convert.ToUInt64(Console.ReadLine());
if (sectorStart < sectorEnd)
{
break;
}
else
{
Console.WriteLine("\nStart sector cannot be greater than end Sector.....Try again!!!\n");
}
}
long sectorDiff = sectorEnd - sectorStart;
int size = Wipe.sectorWriteSize;// ((sectorDiff > 32) ? ((sectorDiff > 1024) ? (512 * 2 * 64) : (512 * 2 * 4)) : 512); //512 * 2 * 1024;
ulong distanceToMove = (ulong)(sectorStart * size);
Console.WriteLine("\nWriting entered pattern to disk\n");
try
{
fixed(byte *writeBufferPointer = writeBuffer)
{
DeviceIO.SetFilePointerEx(this.fileHandle, distanceToMove, out newFilePtr, DeviceIO.FILE_BEGIN);
for (long i = sectorStart; i <= sectorEnd; i += (size / 512))
{
if (!DeviceIO.WriteFile(this.fileHandle, writeBufferPointer + writeOffset, (uint)size, &BytesWritten, IntPtr.Zero))
{
Marshal.ThrowExceptionForHR(Marshal.GetHRForLastWin32Error());
}
//sectorStart += (size / 512);
if (i % 100 == 0)
{
drawTextProgressBar((int)i, (int)sectorEnd);
}
}
Console.WriteLine("After WriteFile");
}
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
}
/// <summary>
/// Function to Read Data into the Buffer from disk
/// </summary>
/// <param name="readBuffer">bytes read from the current disk.</param>
/// <param name="readOffset"> byte offset in readBuffer at which to begin storing the data read from the current stream.</param>
/// <param name="readCount">The maximum number of bytes to be read from the current stream.</param>
/// <returns>
/// Number of bytes read into the buffer.
/// </returns>
public unsafe uint Read(byte[] readBuffer, uint readOffset, uint readCount)
{
uint BytesRead = 0;
UInt64 newFilePtr = 0;
uint size = 512;// ((sectorDiff > 32) ? ((sectorDiff > 1024) ? (512 * 2 * 64 ) : (512 * 2 * 4)) : 512);
ulong distanceToMove = (ulong)(Wipe.sectorStart * size);
Console.WriteLine("\nVerifying Write Pattern....\n");
fixed(byte *readBufferPointer = readBuffer)
{
DeviceIO.SetFilePointerEx(this.fileHandle, distanceToMove, out newFilePtr, DeviceIO.FILE_BEGIN);
for (ulong i = Wipe.sectorStart; i <= Wipe.sectorEnd; i += ((ulong)size / 512))
{
if (!DeviceIO.ReadFile(this.fileHandle, readBufferPointer + readOffset, size, &BytesRead, IntPtr.Zero))
{
Marshal.ThrowExceptionForHR(Marshal.GetHRForLastWin32Error());
}
if (!readBuffer.SequenceEqual(toWrite))
{
Wipe.sectorErrorCount++;
}
/*else
* {
* Console.WriteLine("Could not verify");
* }*/
//Wipe.sectorStart += ((ulong)size / 512);
}
Console.WriteLine("Verification Complete.....");
return(BytesRead);
}
}
