if (rem == 0) {
            return 0;
        }
        return 8 - rem;
    }

    @Override
    public int decode(final byte[] buffer, final int bufferIndex) throws SMBProtocolDecodingException {
        return decode(buffer, bufferIndex, false);
    }

    /**
     * Decodes the SMB2 message from the buffer.
     *
     * @param buffer the buffer containing the message

 */
package jcifs.internal.dfs;

import java.util.Arrays;

import jcifs.Decodable;
import jcifs.internal.util.SMBUtil;

/**
 * DFS (Distributed File System) referral response buffer parser.
 * Decodes server responses to DFS referral requests, extracting information about
 * available DFS targets, path consumption details, and referral flags.
 *
 * @author mbechler
 */

            Arrays.fill(buffer2, (byte) 0x22);

            // First decode
            response.decode(buffer1, 0, 50);
            byte[] data1 = response.getData();

            // Second decode should overwrite
            response.decode(buffer2, 10, 60);
            byte[] data2 = response.getData();

            // Verify second decode overwrote first
            assertEquals(60, data2.length);

    }

    @ParameterizedTest(name = "decode({1}) -> {2}")
    @MethodSource("decodeProvider")
    void testDecode(String encoded, byte[] expected) {
        // Act
        byte[] actual = Base64.decode(encoded);
        // Assert
        assertArrayEquals(expected, actual, "Base64.decode should return original bytes");
    }

    @Test

            byte[] buffer = new byte[bufferSize];
            FileFsSizeInformation info = new FileFsSizeInformation();

            int decoded = info.decode(buffer, 0, Math.min(bufferSize, 24));

            assertEquals(24, decoded);
        }
    }

    class IntegrationTests {

        @Test
        @DisplayName("Should maintain state after multiple decodes")
        void testMultipleDecodes() throws SMBProtocolDecodingException {
            // First decode
            byte[] buffer1 = createValidCopyChunkResponse(1, 1024, 1024);
            response.decode(buffer1, 0, buffer1.length);
            assertEquals(1, response.getChunksWritten());

     */
    public abstract void encode(NdrBuffer dst) throws NdrException;

    /**
     * Decodes this NDR object from the specified buffer
     * @param src the source buffer for decoding
     * @throws NdrException if decoding fails
     */
    public abstract void decode(NdrBuffer src) throws NdrException;

     */
    public abstract void encode(NdrBuffer dst) throws NdrException;

    /**
     * Decodes this NDR object from the specified buffer
     * @param src the source buffer for decoding
     * @throws NdrException if decoding fails
     */
    public abstract void decode(NdrBuffer src) throws NdrException;

    }

    @ParameterizedTest
    @MethodSource("int32Provider")
    @DisplayName("readParameterWordsWireFormat correctly decodes 32-bit offset")
    void testReadParameterWords(int expectedInt, byte[] bytes) {
        // The implementation reads via SMBUtil.readInt4 which returns an int
        // When assigned to a long field, it gets sign-extended

     * Extracts and parses parameters from the request query string.
     * Applies the specified character encoding to decode parameter values.
     *
     * @param request the HTTP request containing the query string
     * @param enc the character encoding to use for decoding
     * @return a map of parameter names to their decoded values
     * @throws IOException if an error occurs during parameter parsing
     */