public override long Seek(long offset, SeekOrigin origin)
{
// Find the correct part
long offsetFromStart = 0;
switch (origin)
{
case SeekOrigin.Begin:
offsetFromStart = offset;
break;
case SeekOrigin.Current:
offsetFromStart = Position + offset;
break;
case SeekOrigin.End:
offsetFromStart = length + offset;
break;
}
// Use this to calculate the correct file
PartialFile part = FindPartAt(offsetFromStart);
Debug.WriteLine("Seeking to {0} from {1}, found in part {2}, currentpart {3}", offset, origin, part.Number,
currentPart.Number);
if (!currentPart.Equals(part))
{
if (!OpenPart(part))
{
positionInPart = currentPart.Length;
internalStream.Seek(0, SeekOrigin.End);
_position = currentPart.StartPosition + currentPart.Length;
return(_position);
}
}
positionInPart = offsetFromStart - currentPart.StartPosition;
internalStream.Seek(positionInPart, SeekOrigin.Begin);
_position = offsetFromStart;
return(_position);
}
public override long Seek(long offset, SeekOrigin origin)
{
long offsetFromStart = 0;
switch (origin)
{
case SeekOrigin.Begin:
offsetFromStart = offset;
break;
case SeekOrigin.Current:
offsetFromStart = Position + offset;
break;
case SeekOrigin.End:
offsetFromStart = length + offset;
break;
}
// Use this to calculate the correct file
PartialFile part = FindPartAt(offsetFromStart);
if (!_currentPart.Equals(part))
{
if (!OpenPart(part))
{
positionInPart = _currentPart.Length;
_current.Seek(0, SeekOrigin.End);
_position = _currentPart.StartPosition + _currentPart.Length;
return(_position);
}
}
positionInPart = offsetFromStart - _currentPart.StartPosition;
_current.Seek(positionInPart, SeekOrigin.Begin);
_position = offsetFromStart;
return(_position);
}