# File resolv.rb, line 1156
        def initialize
          @data = ''
          @names = {}
          yield self
        end

# File resolv.rb, line 1166
        def put_bytes(d)
          @data << d
        end

# File resolv.rb, line 1212
        def put_label(d)
          self.put_string(d.string)
        end

# File resolv.rb, line 1198
        def put_labels(d)
          d.each_index {|i|
            domain = d[i..-1]
            if idx = @names[domain]
              self.put_pack("n", 0xc000 | idx)
              return
            else
              @names[domain] = @data.length
              self.put_label(d[i])
            end
          }
          @data << "\0"
        end

# File resolv.rb, line 1174
        def put_length16
          length_index = @data.length
          @data << "\0\0"
          data_start = @data.length
          yield
          data_end = @data.length
          @data[length_index, 2] = [data_end - data_start].pack("n")
        end

# File resolv.rb, line 1194
        def put_name(d)
          put_labels(d.to_a)
        end

# File resolv.rb, line 1170
        def put_pack(template, *d)
          @data << d.pack(template)
        end

# File resolv.rb, line 1183
        def put_string(d)
          self.put_pack("C", d.length)
          @data << d
        end

# File resolv.rb, line 1188
        def put_string_list(ds)
          ds.each {|d|
            self.put_string(d)
          }
        end

# File resolv.rb, line 1162
        def to_s
          return @data
        end