/// <inheritdoc/>
public override long Seek(long offset, SeekOrigin origin)
{
switch (origin)
{
case SeekOrigin.Begin:
InternalStream.Seek(startPosition + offset, SeekOrigin.Begin);
break;
case SeekOrigin.Current:
InternalStream.Seek(offset, SeekOrigin.Current);
break;
case SeekOrigin.End:
// Maybe we don't know the actual file size (full file)
if (endPosition == -1)
{
InternalStream.Seek(offset, SeekOrigin.End);
}
else
{
InternalStream.Seek(endPosition - startPosition + offset, SeekOrigin.Begin);
}
break;
}
var newPosition = InternalStream.Position;
if (newPosition < startPosition || (endPosition != -1 && newPosition > endPosition))
{
InternalStream.Position = startPosition;
throw new InvalidOperationException("Seek position is out of bound.");
}
return(newPosition);
}
public override long Seek(long offset, SeekOrigin origin)
{
switch (origin)
{
case SeekOrigin.Begin: return(InternalStream.Seek(offset + DataOffset, SeekOrigin.Begin));
case SeekOrigin.Current: return(InternalStream.Seek(offset, SeekOrigin.Current));
case SeekOrigin.End: return(InternalStream.Seek(DataOffset + DataLength - offset, SeekOrigin.Begin));
default: throw new InvalidOperationException();
}
}
public override long Seek(long offset, SeekOrigin origin)
{
return(InternalStream.Seek(offset, origin));
}
