class IO::Stream::Generic

def read(size = nil)
	return String.new(encoding: Encoding::BINARY) if size == 0
	
	if size
		until @eof or @read_buffer.bytesize >= size
			# Compute the amount of data we need to read from the underlying stream:
			read_size = size - @read_buffer.bytesize
			
			# Don't read less than @block_size to avoid lots of small reads:
			fill_read_buffer(read_size > @block_size ? read_size : @block_size)
		end
	else
		until @eof
			fill_read_buffer
		end
	end
	
	return consume_read_buffer(size)
end