if len(s) < 2 {
			return Properties{}, 0
		}
		i := bidiIndex[c0]
		c1 := s[1]
		if c1 < 0x80 || 0xC0 <= c1 {
			return Properties{}, 1
		}
		return Properties{entry: trie.lookupValue(uint32(i), c1)}, 2
	case c0 < 0xF0: // 3-byte UTF-8
		if len(s) < 3 {
			return Properties{}, 0
		}
		i := bidiIndex[c0]
		c1 := s[1]
		if c1 < 0x80 || 0xC0 <= c1 {
			return Properties{}, 1
		}

	c0 := s[0]
	if c0 < 0x80 { // is ASCII
		return bidiValues[c0]
	}
	i := bidiIndex[c0]
	if c0 < 0xE0 { // 2-byte UTF-8
		return t.lookupValue(uint32(i), s[1])
	}
	i = bidiIndex[uint32(i)<<6+uint32(s[1])]
	if c0 < 0xF0 { // 3-byte UTF-8
		return t.lookupValue(uint32(i), s[2])
	}
	i = bidiIndex[uint32(i)<<6+uint32(s[2])]
	if c0 < 0xF8 { // 4-byte UTF-8
		return t.lookupValue(uint32(i), s[3])
	}

	c0 := s[0]
	if c0 < 0x80 { // is ASCII
		return bidiValues[c0]
	}
	i := bidiIndex[c0]
	if c0 < 0xE0 { // 2-byte UTF-8
		return t.lookupValue(uint32(i), s[1])
	}
	i = bidiIndex[uint32(i)<<6+uint32(s[1])]
	if c0 < 0xF0 { // 3-byte UTF-8
		return t.lookupValue(uint32(i), s[2])
	}
	i = bidiIndex[uint32(i)<<6+uint32(s[2])]
	if c0 < 0xF8 { // 4-byte UTF-8
		return t.lookupValue(uint32(i), s[3])
	}

	c0 := s[0]
	if c0 < 0x80 { // is ASCII
		return bidiValues[c0]
	}
	i := bidiIndex[c0]
	if c0 < 0xE0 { // 2-byte UTF-8
		return t.lookupValue(uint32(i), s[1])
	}
	i = bidiIndex[uint32(i)<<6+uint32(s[1])]
	if c0 < 0xF0 { // 3-byte UTF-8
		return t.lookupValue(uint32(i), s[2])
	}
	i = bidiIndex[uint32(i)<<6+uint32(s[2])]
	if c0 < 0xF8 { // 4-byte UTF-8
		return t.lookupValue(uint32(i), s[3])
	}

	c0 := s[0]
	if c0 < 0x80 { // is ASCII
		return bidiValues[c0]
	}
	i := bidiIndex[c0]
	if c0 < 0xE0 { // 2-byte UTF-8
		return t.lookupValue(uint32(i), s[1])
	}
	i = bidiIndex[uint32(i)<<6+uint32(s[1])]
	if c0 < 0xF0 { // 3-byte UTF-8
		return t.lookupValue(uint32(i), s[2])
	}
	i = bidiIndex[uint32(i)<<6+uint32(s[2])]
	if c0 < 0xF8 { // 4-byte UTF-8
		return t.lookupValue(uint32(i), s[3])
	}

	c0 := s[0]
	if c0 < 0x80 { // is ASCII
		return bidiValues[c0]
	}
	i := bidiIndex[c0]
	if c0 < 0xE0 { // 2-byte UTF-8
		return t.lookupValue(uint32(i), s[1])
	}
	i = bidiIndex[uint32(i)<<6+uint32(s[1])]
	if c0 < 0xF0 { // 3-byte UTF-8
		return t.lookupValue(uint32(i), s[2])
	}
	i = bidiIndex[uint32(i)<<6+uint32(s[2])]
	if c0 < 0xF8 { // 4-byte UTF-8
		return t.lookupValue(uint32(i), s[3])
	}

	c0 := s[0]
	if c0 < 0x80 { // is ASCII
		return bidiValues[c0]
	}
	i := bidiIndex[c0]
	if c0 < 0xE0 { // 2-byte UTF-8
		return t.lookupValue(uint32(i), s[1])
	}
	i = bidiIndex[uint32(i)<<6+uint32(s[1])]
	if c0 < 0xF0 { // 3-byte UTF-8
		return t.lookupValue(uint32(i), s[2])
	}
	i = bidiIndex[uint32(i)<<6+uint32(s[2])]
	if c0 < 0xF8 { // 4-byte UTF-8
		return t.lookupValue(uint32(i), s[3])
	}

    }

    /** Returns true if the bit changed value. */
    boolean set(long bitIndex) {
      if (get(bitIndex)) {
        return false;
      }

      int longIndex = (int) (bitIndex >>> LONG_ADDRESSABLE_BITS);
      long mask = 1L << bitIndex; // only cares about low 6 bits of bitIndex

      long oldValue;
      long newValue;
      do {
        oldValue = data.get(longIndex);

    }

    /** Returns true if the bit changed value. */
    boolean set(long bitIndex) {
      if (get(bitIndex)) {
        return false;
      }

      int longIndex = (int) (bitIndex >>> LONG_ADDRESSABLE_BITS);
      long mask = 1L << bitIndex; // only cares about low 6 bits of bitIndex

      long oldValue;
      long newValue;
      do {
        oldValue = data.get(longIndex);

	Hungarian            Tag = Tag{language: huIndex, locale: huIndex}
	Armenian             Tag = Tag{language: hyIndex, locale: hyIndex}
	Indonesian           Tag = Tag{language: idIndex, locale: idIndex}
	Icelandic            Tag = Tag{language: isIndex, locale: isIndex}
	Italian              Tag = Tag{language: itIndex, locale: itIndex}
	Japanese             Tag = Tag{language: jaIndex, locale: jaIndex}