writeInt2(fid, dst, dstIndex);
        dstIndex += 2;
        writeInt4(offset, dst, dstIndex);
        dstIndex += 4;
        for (int i = 0; i < 4; i++) {
            dst[dstIndex++] = (byte) 0xFF;
        }
        writeInt2(writeMode, dst, dstIndex);
        dstIndex += 2;
        writeInt2(remaining, dst, dstIndex);
        dstIndex += 2;
        dst[dstIndex] = (byte) 0x00;
        dstIndex++;

	MOVW	$0xff, R9            // MOVW $255, R9             // ff90a0e3
	MOVW	$0xff000000, R9      // MOVW $4278190080, R9      // ff94a0e3
	MOVW	$0xff(R0), R1        // MOVW $255(R0), R1         // ff1080e2
	MOVW.S	$0xff(R0), R1        // MOVW.S $255(R0), R1       // ff1090e2
	MOVW	$-0xff(R0), R1       // MOVW $-255(R0), R1        // ff1040e2
	MOVW.S	$-0xff(R0), R1       // MOVW.S $-255(R0), R1      // ff1050e2

        void testSignZeroesSignatureField() {
            // Fill signature field with non-zero values
            for (int i = 0; i < SIGNATURE_LENGTH; i++) {
                data[SIGNATURE_OFFSET + i] = (byte) 0xFF;
            }

            digest.sign(data, 0, data.length, request, response);

            // Verify signature field contains actual signature (not all zeros)

        byte[] h = new byte[4];
        h[0] = (byte) SessionServicePacket.SESSION_MESSAGE;
        h[1] = (byte) ((length >> 16) & 0x01);
        h[2] = (byte) ((length >> 8) & 0xFF);
        h[3] = (byte) (length & 0xFF);
        return h;
    }

    /**
     * Creates a NetBIOS keep-alive header.
     * Keep-alive packets have type 0x85 and zero length.
     */
    private static byte[] keepAliveHeader() {

      } else {
        encodedCharBuffer.writeString(input, i, i + Character.charCount(codePoint), charset)
      }

      while (!encodedCharBuffer.exhausted()) {
        val b = encodedCharBuffer.readByte().toInt() and 0xff
        writeByte('%'.code)
        writeByte(HEX_DIGITS[b shr 4 and 0xf].code)
        writeByte(HEX_DIGITS[b and 0xf].code)
      }
    } else {
      // This character doesn't need encoding. Just copy it over.

            // Manually verify the encoded bytes
            assertEquals(buffer.size(), bytesEncoded);

            // Check referral level (little-endian)
            assertEquals(4, dst[0] & 0xFF);
            assertEquals(0, dst[1] & 0xFF);

            // Check path starts at byte 2
            byte[] expectedPathBytes = path.getBytes(StandardCharsets.UTF_16LE);
            byte[] actualPathBytes = new byte[expectedPathBytes.length];

        byte[] buffer = new byte[512];
        // Fill buffer with non-zero values to ensure padding writes zeros
        for (int i = 0; i < buffer.length; i++) {
            buffer[i] = (byte) 0xFF;
        }

        int written = trans2SetFileInfo.writeDataWireFormat(buffer, 0);

        // Should report 26 bytes written (20 from encode + 6 increment)
        assertEquals(26, written);

		header: []byte{0x2a, 0x4d, 0x18},
		f:      formatZstd,
	},
	{
		// LZ4
		header: []byte{0x4, 0x22, 0x4d, 0x18},
		f:      formatLZ4,
	},
	{
		// Snappy/S2 stream
		header: []byte{0xff, 0x06, 0x00, 0x00},
		f:      formatS2,
	},
	{
		header: []byte{0x42, 0x5a, 'h'},
		f:      formatBZ2,
	},
}

type untarOptions struct {
	ignoreDirs bool
	ignoreErrs bool
	prefixAll  string

       * propagate the never indexed flag of a header.
       */
      @Throws(IOException::class)
      fun readHeaders() {
        while (!source.exhausted()) {
          val b = source.readByte() and 0xff
          when {
            b == 0x80 -> {
              // 10000000
              throw IOException("index == 0")
            }

            b and 0x80 == 0x80 -> {
              // 1NNNNNNN

        // Test with data length exactly matching outputBuffer size
        byte[] testData = new byte[outputBuffer.length];
        Arrays.fill(testData, (byte) 0xFF);
        byte[] buffer = new byte[outputBuffer.length + 100];
        System.arraycopy(testData, 0, buffer, 0, outputBuffer.length);

        int result = response.readDataWireFormat(buffer, 0, outputBuffer.length);