    # File lib/gettext/runtime/mofile.rb, line 190
        def hash_string(str)
          hval = 0
          i = 0
          str.each_byte do |b|
            break if b == '\0'
            hval <<= 4
            hval += b.to_i
            g = hval & (0xf << (HASHWORDBITS - 4))
            if (g != 0)
              hval ^= g >> (HASHWORDBITS - 8)
              hval ^= g
            end
          end
          hval
        end