@Override
    public Hasher putByte(byte b) {
      update(1, b & 0xFF);
      return this;
    }

    @CanIgnoreReturnValue
    @Override
    public Hasher putBytes(byte[] bytes, int off, int len) {
      checkPositionIndexes(off, off + len, bytes.length);
      int i;
      for (i = 0; i + 4 <= len; i += 4) {
        update(4, getIntLittleEndian(bytes, off + i));
      }
      for (; i < len; i++) {

    @Override
    public int bits() {
      return bytes.length * 8;
    }

    @Override
    public byte[] asBytes() {
      return bytes.clone();
    }

    @Override
    public int asInt() {
      checkState(
          bytes.length >= 4,
          "HashCode#asInt() requires >= 4 bytes (it only has %s bytes).",
          bytes.length);
      return (bytes[0] & 0xFF)
          | ((bytes[1] & 0xFF) << 8)

        assertNotEquals(guid1, guid2);
        assertEquals(16, guid1.toBytes().length);
        assertEquals(16, guid2.toBytes().length);
    }

    @Test
    public void testHandleGuidRoundTrip() {
        HandleGuid original = new HandleGuid();
        byte[] bytes = original.toBytes();
        HandleGuid reconstructed = new HandleGuid(bytes);

        assertEquals(original, reconstructed);

        // Padding to align data to 8-byte boundary
        dstIndex += 4;

        // Write durable handle V2 request data (32 bytes total)
        // MS-SMB2 2.2.13.2.4 structure:
        SMBUtil.writeInt4((int) getTimeoutFor100Ns(), dst, dstIndex); // Timeout (4 bytes in 100-ns intervals)
        dstIndex += 4;

        SMBUtil.writeInt4(flags, dst, dstIndex); // Flags (4 bytes)
        dstIndex += 4;

            (byte) 49, (byte) 41, (byte) 33, (byte) 25, (byte) 17, (byte) 9, (byte) 1, (byte) 58, (byte) 50, (byte) 42, (byte) 34,
            (byte) 26, (byte) 18, (byte) 10, (byte) 2, (byte) 59, (byte) 51, (byte) 43, (byte) 35, (byte) 62, (byte) 54, (byte) 46,
            (byte) 38, (byte) 30, (byte) 22, (byte) 14, (byte) 6, (byte) 61, (byte) 53, (byte) 45, (byte) 37, (byte) 29, (byte) 21,

    return new String(chars);
  }

  private static byte[] toByteArray(int... bytes) {
    byte[] realBytes = new byte[bytes.length];
    for (int i = 0; i < bytes.length; i++) {
      realBytes[i] = (byte) bytes[i];
    }
    return realBytes;
  }

  private static void assertWellFormed(int... bytes) {
    assertTrue(Utf8.isWellFormed(toByteArray(bytes)));
  }

    }

    /**
     * Create a handle GUID from existing bytes
     * @param bytes the 16-byte GUID data in little-endian format (SMB wire format)
     */
    public HandleGuid(byte[] bytes) {
        if (bytes.length != 16) {
            throw new IllegalArgumentException("GUID must be 16 bytes");
        }

        // MS-SMB2 specifies little-endian byte ordering for GUID components

    // TODO(jwilson): detect overflow.
    var result = 0L
    while (true) {
      val byteN = source.readByte().toLong() and 0xff
      if ((byteN and 0b1000_0000L) == 0b1000_0000L) {
        result = (result + (byteN and 0b0111_1111)) shl 7
      } else {
        return result + byteN
      }
    }
  }

  /** Read a value as bytes without interpretation of its contents. */

    }
    
    public HandleGuid(byte[] bytes) {
        if (bytes.length != 16) {
            throw new IllegalArgumentException("GUID must be 16 bytes");
        }
        ByteBuffer bb = ByteBuffer.wrap(bytes);
        long mostSig = bb.getLong();
        long leastSig = bb.getLong();
        this.guid = new UUID(mostSig, leastSig);
    }
    
    public byte[] toBytes() {
        ByteBuffer bb = ByteBuffer.allocate(16);

  public void testBytes() {
    Sink sink = new Sink(4); // byte order insignificant here
    byte[] expected = {1, 2, 3, 4, 5, 6, 7, 8};
    sink.putByte((byte) 1);
    sink.putBytes(new byte[] {2, 3, 4, 5, 6});
    sink.putByte((byte) 7);
    sink.putBytes(new byte[] {});
    sink.putBytes(new byte[] {8});
    HashCode unused = sink.hash();
    sink.assertInvariants(8);
    sink.assertBytes(expected);