}

	// Fast path 2: Correct UTF-8 decode without error.
	_, width := utf8.DecodeRune(data)
	if width > 1 {
		// It's a valid encoding. Width cannot be one for a correctly encoded
		// non-ASCII rune.
		return width, data[0:width], nil
	}

	// We know it's an error: we have width==1 and implicitly r==utf8.RuneError.
	// Is the error because there wasn't a full rune to be decoded?

    public void setInterfaces(List<NetworkInterfaceInfo> interfaces) {
        this.interfaces = interfaces;
    }

    /**
     * {@inheritDoc}
     *
     * @see jcifs.Decodable#decode(byte[], int, int)
     */
    @Override
    public int decode(byte[] buffer, int bufferIndex, int len) {
        int start = bufferIndex;
        int end = start + len;
        interfaces.clear();

                _src = _src.deferred;
                root_directory.decode(_src);

            }
            if (_object_namep != 0) {
                if (object_name == null) { /* YOYOYO */
                    object_name = new rpc.unicode_string();
                }
                _src = _src.deferred;
                object_name.decode(_src);

            }
            if (_security_quality_of_servicep != 0) {

        SMBUtil.writeInt2(20, buffer, 42); // byteCount

        int length = testBlock.decode(buffer, 0);

        assertTrue(length > 0);
        assertEquals(4, testBlock.wordCount);
        assertNull(testBlock.getAndx());
    }

    @Test
    @DisplayName("Test decode with retain payload")
    void testDecodeWithRetainPayload() throws SMBProtocolDecodingException {

        // Call the decode method
        ndrLong.decode(mockNdrBuffer);

        // Verify that dec_ndr_long was called exactly once
        verify(mockNdrBuffer, times(1)).dec_ndr_long();
        // Verify that the value field was updated correctly
        assertEquals(decodedValue, ndrLong.value, "Decode should correctly assign the value returned by dec_ndr_long.");

        return stream(getRoles()).get(stream -> stream.map(this::decode).toArray(n -> new String[n]));
    }

    @Override
    public String[] getGroupNames() {
        return stream(getGroups()).get(stream -> stream.map(this::decode).toArray(n -> new String[n]));
    }

    private String decode(final String value) {
        return new String(Base64.getDecoder().decode(value), Constants.CHARSET_UTF_8);
    }

    @Override

        int bytesEncoded = originalInfo.encode(buffer, 0);

        // When - Decode
        FileBasicInfo decodedInfo = new FileBasicInfo();
        int bytesDecoded = decodedInfo.decode(buffer, 0, bytesEncoded);

        // Then
        assertEquals(40, bytesEncoded);
        assertEquals(36, bytesDecoded); // decode returns 36, encode returns 40

import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;

/**
 * JUnit 5 tests for AndXServerMessageBlock in legacy smb1 package.
 *
 * The tests use small stub subclasses to drive encode/decode paths and
 * validate batching, chaining, signing, and NT_CREATE_ANDX extended handling.
 */
class AndXServerMessageBlockTest {

    /**
     * Test stub for AndXServerMessageBlock to control read/write logic.
     */

    /**
     * Convert the input string to a code point. Accepts regular decimal numerals, hex strings, and
     * some symbolic names meaningful to humans.
     */
    private static int decode(String userFriendly) {
      try {
        return Integer.decode(userFriendly);
      } catch (NumberFormatException ignored) {
        if (userFriendly.matches("(?i)(?:American|English|ASCII)")) {
          // 1-byte UTF-8 sequences - "American" ASCII text

 */
package jcifs.internal;

import jcifs.CIFSException;

/**
 * Exception thrown when errors occur during SMB protocol message decoding.
 * Indicates that an SMB message could not be properly parsed or decoded due to
 * malformed data, protocol violations, or unsupported message formats.
 *
 * @author mbechler
 */
public class SMBProtocolDecodingException extends CIFSException {

    /**
     *
     */