return Map(c.ToTitle, s)
}

// ToValidUTF8 treats s as UTF-8-encoded bytes and returns a copy with each run of bytes
// representing invalid UTF-8 replaced with the bytes in replacement, which may be empty.
func ToValidUTF8(s, replacement []byte) []byte {
	b := make([]byte, 0, len(s)+len(replacement))
	invalid := false // previous byte was from an invalid UTF-8 sequence
	for i := 0; i < len(s); {

        }
        int byte2 = bytes[index++];
        if (byte2 > (byte) 0xBF
            // Overlong? 5 most significant bits must not all be zero.
            || (byte1 == (byte) 0xE0 && byte2 < (byte) 0xA0)
            // Check for illegal surrogate codepoints.
            || (byte1 == (byte) 0xED && byte2 >= (byte) 0xA0)
            // Third byte trailing-byte test.
            || bytes[index++] > (byte) 0xBF) {
          return false;

    void testReadWithDifferentReservedValues(int byte2, int byte3) throws SMBProtocolDecodingException {
        // Given
        byte[] buffer = new byte[256];

        // Write structure size (4)
        SMBUtil.writeInt2(4, buffer, 0);
        // Write reserved field (any value is acceptable)
        buffer[2] = (byte) byte2;
        buffer[3] = (byte) byte3;

        // When

    // loop we keep 56 bytes of state: v, w, x, y, and z.
    long x = load64(bytes, offset);
    long y = load64(bytes, offset + length - 16) ^ K1;
    long z = load64(bytes, offset + length - 56) ^ K0;
    long[] v = new long[2];
    long[] w = new long[2];
    weakHashLength32WithSeeds(bytes, offset + length - 64, length, y, v);

                new byte[] {(byte) 2, (byte) 3, (byte) 4}))
        .isEqualTo(2);
    assertThat(
            Bytes.indexOf(
                new byte[] {(byte) 2, (byte) 2, (byte) 3, (byte) 4, (byte) 2, (byte) 3, (byte) 4},
                new byte[] {(byte) 2, (byte) 3, (byte) 4}))
        .isEqualTo(1);
    assertThat(
            Bytes.indexOf(
                new byte[] {(byte) 4, (byte) 3, (byte) 2},

    // loop we keep 56 bytes of state: v, w, x, y, and z.
    long x = load64(bytes, offset);
    long y = load64(bytes, offset + length - 16) ^ K1;
    long z = load64(bytes, offset + length - 56) ^ K0;
    long[] v = new long[2];
    long[] w = new long[2];
    weakHashLength32WithSeeds(bytes, offset + length - 64, length, y, v);

        byte[] buffer = new byte[28];
        Arrays.fill(buffer, 0, 24, (byte) 0xAA);

        // Decode with len = 24 (minimum valid)
        int bytesConsumed = response.decode(buffer, 0, 24);

        // Verify - should consume 28 bytes even though len is 24
        assertEquals(28, bytesConsumed, "Should consume 28 bytes");

        byte[] resumeKey = response.getResumeKey();

    }

    @ParameterizedTest
    @DisplayName("Test reserved bytes are properly skipped")
    @ValueSource(bytes = { 0x00, 0x01, (byte) 0xFF, 0x7F, (byte) 0x80 })
    void testReservedBytesSkipped(byte reservedValue) throws Exception {
        byte[] buffer = new byte[100];
        int bufferIndex = 0;

        // Set reserved bytes to non-zero values (should be ignored)
        buffer[bufferIndex] = reservedValue;

  public Hasher putByte(byte b) {
    update(b);
    return this;
  }

  @Override
  @CanIgnoreReturnValue
  public Hasher putBytes(byte[] bytes) {
    checkNotNull(bytes);
    update(bytes);
    return this;
  }

  @Override
  @CanIgnoreReturnValue
  public Hasher putBytes(byte[] bytes, int off, int len) {
    checkPositionIndexes(off, off + len, bytes.length);
    update(bytes, off, len);
    return this;

    }

    /**
     * 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