extract_resources

# File lib/resolv.rb, line 570
    def extract_resources(msg, name, typeclass) # :nodoc:
      if typeclass < Resource::ANY
        n0 = Name.create(name)
        msg.each_resource {|n, ttl, data|
          yield data if n0 == n
        }
      end
      yielded = false
      n0 = Name.create(name)
      msg.each_resource {|n, ttl, data|
        if n0 == n
          case data
          when typeclass
            yield data
            yielded = true
          when Resource::CNAME
            n0 = data.name
          end
        end
      }
      return if yielded
      msg.each_resource {|n, ttl, data|
        if n0 == n
          case data
          when typeclass
            yield data
          end
        end
      }
    end