* element content or {@link #xmlAttributeEscaper} in attribute values.
   *
   * <p>This escaper substitutes {@code 0xFFFD} for non-whitespace control characters and the
   * character values {@code 0xFFFE} and {@code 0xFFFF} which are not permitted in XML. For more
   * detail see section <a href="http://www.w3.org/TR/2008/REC-xml-20081126/#charsets">2.2</a> of
   * the XML specification.
   *

     * - Tab (0x9)
     * - Line feed (0xA)
     * - Carriage return (0xD)
     * - Any character between 0x20 and 0xD7FF
     * - Any character between 0xE000 and 0xFFFD
     * - Any character between 0x10000 and 0x10FFFF
     *
     * @param in the input string to be processed
     * @return a new string with invalid XML characters removed, or the original

	repl string
	out  string
}{
	{"", "\uFFFD", ""},
	{"abc", "\uFFFD", "abc"},
	{"\uFDDD", "\uFFFD", "\uFDDD"},
	{"a\xffb", "\uFFFD", "a\uFFFDb"},
	{"a\xffb\uFFFD", "X", "aXb\uFFFD"},
	{"a☺\xffb☺\xC0\xAFc☺\xff", "", "a☺b☺c☺"},
	{"a☺\xffb☺\xC0\xAFc☺\xff", "日本語", "a☺日本語b☺日本語c☺日本語"},
	{"\xC0\xAF", "\uFFFD", "\uFFFD"},
	{"\xE0\x80\xAF", "\uFFFD", "\uFFFD"},
	{"\xed\xa0\x80", "abc", "abc"},

    void testNegativeFidValue() {
        int fid = -1; // Will be treated as 0xFFFF in unsigned 16-bit
        notifyChange = new NtTransNotifyChange(mockConfig, fid, FILE_NOTIFY_CHANGE_FILE_NAME, false);
        byte[] dst = new byte[10];

        notifyChange.writeSetupWireFormat(dst, 0);

        // Should write as 0xFFFF (65535 in unsigned)
        assertEquals(0xFFFF, SMBUtil.readInt2(dst, 4));
    }

    @Test

        int fid = -1; // Will be treated as 0xFFFF in unsigned 16-bit
        querySecurityDesc = new NtTransQuerySecurityDesc(mockConfig, fid, OWNER_SECURITY_INFORMATION);
        byte[] dst = new byte[10];

        querySecurityDesc.writeParametersWireFormat(dst, 0);

        // Should write as 0xFFFF (65535 in unsigned)
        assertEquals(0xFFFF, SMBUtil.readInt2(dst, 0));
    }

    @Test

            }

            // there seems to be a bug with some servers that causes corruption if using signatures + CAP_LARGE_WRITE
            if (th.hasCapability(SmbConstants.CAP_LARGE_WRITEX) && !th.areSignaturesActive()) {
                this.writeSize = Math.min(th.getConfig().getSendBufferSize() - 70, 0xFFFF - 70);
            }

            this.fp = 0L;

        }

        @Test
        @DisplayName("Should handle ciphers with maximum value")
        void testMaximumCipherValues() throws SMBProtocolDecodingException {
            int[] ciphers = { 0xFFFF, 0x0000, 0x7FFF };
            EncryptionNegotiateContext originalContext = new EncryptionNegotiateContext(mockConfig, ciphers);

            int encoded = originalContext.encode(buffer, 0);

        assertEquals((byte) ((value >> 8) & 0xFF), dst[0]);
        assertEquals((byte) (value & 0xFF), dst[1]);
    }

    @Test
    @DisplayName("writeInt2 with offset should write at correct position")
    void testWriteInt2WithOffset() {
        byte[] dst = new byte[10];
        dst[2] = (byte) 0xFF; // Mark position
        dst[3] = (byte) 0xFF;

        SessionServicePacket.writeInt2(0xABCD, dst, 4);

        buffer.putShort(0, (short) 0xFFFF);
        assertEquals(0xFFFF, NtlmMessage.readUShort(data, 0), "Should read max UShort correctly.");

        // Test with a negative short (should be interpreted as unsigned positive)
        buffer.putShort(0, (short) -1); // -1 is 0xFFFF
        assertEquals(0xFFFF, NtlmMessage.readUShort(data, 0), "Should interpret -1 as unsigned max UShort.");
    }

    @Override
    public final int readUnsignedShort() throws SmbException {
        if (read(tmp, 0, 2) < 0) {
            throw new SmbException("EOF");
        }
        return Encdec.dec_uint16be(tmp, 0) & 0xFFFF;
    }

    @Override
    public final char readChar() throws SmbException {
        if (read(tmp, 0, 2) < 0) {
            throw new SmbException("EOF");
        }