docs: static protected int getPadBits(
          int bitString)
      {
          int val = 0;
          for (int i = 3; i >= 0; i--)
          {
              //
              // this may look a little odd, but if it isn't done like this pre jdk1.2
              // JVM's break!
              //
              if (i != 0)
              {
                  if ((bitString >> (i * 8)) != 0)
                  {
                      val = (bitString >> (i * 8)) & 0xFF;
                      break;
                  }
              }
              else
              {
                  if (bitString != 0)
                  {
                      val = bitString & 0xFF;
                      break;
                  }
              }
          }
  
          if (val == 0)
          {
              return 7;
          }
  
  
          int bits = 1;
  
          while (((val <<= 1) & 0xFF) != 0)
          {
              bits++;
          }
  
          return 8 - bits;
      }