# File lib/uuid.rb, line 379
379:   def write_state(io)
380:     mac2 =  @mac        & 0xffffffff
381:     mac1 = (@mac >> 32) & 0xffff
382: 
383:     io.write [mac1, mac2, @sequence, @last_clock].pack(STATE_FILE_FORMAT)
384:   end