# Read a null terminated string
	#
	# To be used with `Writer::write_string`.
	#
	# Returns a truncated string when an error is pending (`last_error != null`).
	fun read_string: String
	do
		var buf = new Bytes.empty
		loop
			var byte = read_byte
			if byte <= 0 then
				return buf.to_s
			end
			buf.add byte
		end
	end