# File lib/Dnsruby/resource/NSAP.rb, line 72
      def str2bcd(s, bytes)
        retval = "";
        
        digits = bytes * 2;
        string = sprintf("%#{digits}s", s);
        string.tr!(" ","0");
        
        i=0;
        bytes.times do
          bcd = string[i*2, 2];
          retval += [bcd.to_i(16)].pack("C");
          i+=1
        end
        
        return retval;
      end