# File lib/uuid.rb, line 209
209:   def pseudo_mac_address
210:     sha1 = ::Digest::SHA1.new
211:     256.times do
212:       r = [rand(0x100000000)].pack "N"
213:       sha1.update r
214:     end
215:     str = sha1.digest
216:     r = rand 14 # 20-6
217:     node = str[r, 6] || str
218:     if RUBY_VERSION >= "1.9.0"
219:       nnode = node.bytes.to_a
220:       nnode[0] |= 0x01
221:       node = ''
222:       nnode.each { |s| node << s.chr }
223:     else
224:       node[0] |= 0x01 # multicast bit
225:     end
226:     node.bytes.collect{|b|b.to_s(16)}.join.hex & 0x7FFFFFFFFFFF
227:   end