dst[dstIndex + OPCODE_OFFSET] = (byte)(( isResponse ? 0x80 : 0x00 ) +
                        (( opCode << 3 ) & 0x78 ) +
                        ( isAuthAnswer ? 0x04 : 0x00 ) +
                        ( isTruncated ? 0x02 : 0x00 ) +
                        ( isRecurDesired ? 0x01 : 0x00 ));
        dst[dstIndex + OPCODE_OFFSET + 1] = (byte)(( isRecurAvailable ? 0x80 : 0x00 ) +
                        ( isBroadcast ? 0x10 : 0x00 ) +

            else if ( ( ch & 0xE0 ) == 0xC0 ) {
                if ( ( slim - si ) < 2 ) {
                    break;
                }
                uni[ ui ] = (char) ( ( ch & 0x1F ) << 6 );
                ch = src[ si++ ] & 0xFF;
                uni[ ui ] |= ch & 0x3F;
                if ( ( ch & 0xC0 ) != 0x80 || uni[ ui ] < 0x80 ) {
                    throw new IOException("Invalid UTF-8 sequence");
                }
            }

          char c3 = input.charAt(i + 3);
          if (c0 < 0x80 && c1 < 0x80 && c2 < 0x80 && c3 < 0x80) {
            update(4, c0 | (c1 << 8) | (c2 << 16) | (c3 << 24));
            i += 4;
          } else {
            break;
          }
        }

        for (; i < utf16Length; i++) {
          char c = input.charAt(i);
          if (c < 0x80) {
            update(1, c);
          } else if (c < 0x800) {

          when {
            b == 0x80 -> {
              // 10000000
              throw IOException("index == 0")
            }
            b and 0x80 == 0x80 -> {
              // 1NNNNNNN
              val index = readInt(b, PREFIX_7_BITS)
              readIndexedHeader(index - 1)
            }
            b == 0x40 -> {
              // 01000000

        dst[ dstIndex + OPCODE_OFFSET ] = (byte) ( ( this.isResponse ? 0x80 : 0x00 ) + ( ( this.opCode << 3 ) & 0x78 )
                + ( this.isAuthAnswer ? 0x04 : 0x00 ) + ( this.isTruncated ? 0x02 : 0x00 ) + ( this.isRecurDesired ? 0x01 : 0x00 ) );
        dst[ dstIndex + OPCODE_OFFSET
                + 1 ] = (byte) ( ( this.isRecurAvailable ? 0x80 : 0x00 ) + ( this.isBroadcast ? 0x10 : 0x00 ) + ( this.resultCode & 0x0F ) );

            if( ch < 0x80 ) {
                uni[ui] = (char)ch;
            } else if((ch & 0xE0) == 0xC0 ) {
                if((slim - si) < 2 ) {
                    break;
                }
                uni[ui] = (char)((ch & 0x1F) << 6);
                ch = src[si++] & 0xFF;
                uni[ui] |= ch & 0x3F;
                if ((ch & 0xC0) != 0x80 || uni[ui] < 0x80 ) {

		0x4f, 0xce, 0xb3, 0xc2, 0xed, 0x51, 0x2b, 0xb6, 0x8f, 0x14, 0x5c, 0x6e, 0x84,
		0x34, 0x75, 0x2f, 0xab, 0x52, 0xa1, 0xcf, 0xc1, 0x24, 0x40, 0x8f, 0x79, 0xb5,
		0x8a, 0x45, 0x78, 0xc1, 0x64, 0x28, 0x85, 0x57, 0x89, 0xf7, 0xa2, 0x49, 0xe3,
		0x84, 0xcb, 0x2d, 0x9f, 0xae, 0x2d, 0x67, 0xfd, 0x96, 0xfb, 0x92, 0x6c, 0x19,
		0x8e, 0x7, 0x73, 0x99, 0xfd, 0xc8, 0x15, 0xc0, 0xaf, 0x9, 0x7d, 0xde, 0x5a,

  private UnsignedBytes() {}

  /**
   * The largest power of two that can be represented as an unsigned {@code byte}.
   *
   * @since 10.0
   */
  public static final byte MAX_POWER_OF_TWO = (byte) 0x80;

  /**
   * The largest value that fits into an unsigned byte.
   *
   * @since 13.0
   */
  public static final byte MAX_VALUE = (byte) 0xFF;

  private static final int UNSIGNED_MASK = 0xFF;

  /**

	data := []byte{0x58, 0x4c, 0x32, 0x20, 0x1, 0x0, 0x3, 0x0, 0xc6, 0x0, 0x0, 0x3, 0xe8, 0x2, 0x1, 0x3, 0xc4, 0x24, 0x95, 0xc4, 0x10, 0x6a, 0x33, 0x51, 0xe3, 0x48, 0x0, 0x4e, 0xed, 0xab, 0x9, 0x21, 0xeb, 0x83, 0x5a, 0xc6, 0x45, 0xd3, 0x17, 0x21, 0xe7, 0xa1, 0x98, 0x52, 0x88, 0xc, 0xc4, 0x4, 0xfe, 0x54, 0xbc, 0x2f, 0x2, 0x0, 0xc4, 0xd5, 0x83, 0xa4, 0x54, 0x79, 0x70, 0x65, 0x2, 0xa6, 0x44, 0x65, 0x6c, 0x4f, 0x62, 0x6a, 0x83, 0xa2, 0x49, 0x44, 0xc4, 0x10, 0x6a, 0x33, 0x51, 0xe3, 0x48,...

  public void testIsWellFormed_4BytesSamples() {
    // Valid 4 byte.
    assertWellFormed(0xF0, 0xA4, 0xAD, 0xA2);
    // Bad trailing bytes
    assertNotWellFormed(0xF0, 0xA4, 0xAD, 0x7F);
    assertNotWellFormed(0xF0, 0xA4, 0xAD, 0xC0);
    // Special cases for byte2
    assertNotWellFormed(0xF0, 0x8F, 0xAD, 0xA2);
    assertNotWellFormed(0xF4, 0x90, 0xAD, 0xA2);
  }

  /** Tests some hard-coded test cases. */