# File lib/uuid.rb, line 275
275:   def write_state(io)
276:     mac2 =  @mac        & 0xffffffff
277:     mac1 = (@mac >> 32) & 0xffff
278: 
279:     io.write [mac1, mac2, @sequence, @last_clock].pack(STATE_FILE_FORMAT)
280:   end