/// <summary>
/// Read bytes from stream, reading and joining chunks as needed.
/// </summary>
public override int Read(byte[] buffer, int offset, int count)
{
if (count > _buffer.Available() && !_complete)
{
var more = ReadNextChunk();
_buffer.UnRead(more, 0, more.Length);
}
return(_buffer.Read(buffer, offset, count));
}
/// <summary>
/// Push data back onto the buffer, changing the Position
/// and allowing the data to be read again.
///
/// If the underlying stream supports seeking, a seek-back will
/// be used instead.
/// </summary>
/// <param name="buffer">buffer used for matching 'Read' call</param>
/// <param name="offset">offset used for matching 'Read' call</param>
/// <param name="length">length *returned* by matching 'Read' call</param>
public void UnRead(byte[] buffer, int offset, int length)
{
if (_baseStream.CanSeek)
{
_position = _baseStream.Seek(-length, SeekOrigin.Current);
}
else
{
_pushbackBuffer.UnRead(buffer, offset, length);
_position -= length;
}
}