java.util.zip.Adler32源码实例Demo

类java.util.zip.Adler32源码实例Demo

下面列出了java.util.zip.Adler32 类实例代码,或者点击链接到github查看源代码,也可以在右侧发表评论。

源代码1 项目: ZjDroid   文件: DexWriter.java
private void updateChecksum(@Nonnull DexDataStore dataStore) throws IOException {
    Adler32 a32 = new Adler32();

    byte[] buffer = new byte[4 * 1024];
    InputStream input = dataStore.readAt(HeaderItem.CHECKSUM_DATA_START_OFFSET);
    int bytesRead = input.read(buffer);
    while (bytesRead >= 0) {
        a32.update(buffer, 0, bytesRead);
        bytesRead = input.read(buffer);
    }

    // write checksum, utilizing logic in DexWriter to write the integer value properly
    OutputStream output = dataStore.outputAt(HeaderItem.CHECKSUM_OFFSET);
    DexDataWriter.writeInt(output, (int)a32.getValue());
    output.close();
}
 
源代码2 项目: ZjDroid   文件: DexWriter.java
private void updateChecksum(@Nonnull DexDataStore dataStore) throws IOException {
    Adler32 a32 = new Adler32();

    byte[] buffer = new byte[4 * 1024];
    InputStream input = dataStore.readAt(HeaderItem.CHECKSUM_DATA_START_OFFSET);
    int bytesRead = input.read(buffer);
    while (bytesRead >= 0) {
        a32.update(buffer, 0, bytesRead);
        bytesRead = input.read(buffer);
    }

    // write checksum, utilizing logic in DexWriter to write the integer value properly
    OutputStream output = dataStore.outputAt(HeaderItem.CHECKSUM_OFFSET);
    DexDataWriter.writeInt(output, (int)a32.getValue());
    output.close();
}
 
源代码3 项目: deeplearning4j   文件: MnistDataFetcher.java
private void validateFiles(String[] files, long[] checksums){
    //Validate files:
    try {
        for (int i = 0; i < files.length; i++) {
            File f = new File(files[i]);
            Checksum adler = new Adler32();
            long checksum = f.exists() ? FileUtils.checksum(f, adler).getValue() : -1;
            if (!f.exists() || checksum != checksums[i]) {
                throw new IllegalStateException("Failed checksum: expected " + checksums[i] +
                        ", got " + checksum + " for file: " + f);
            }
        }
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}
 
源代码4 项目: incubator-pinot   文件: CrcUtils.java
public long computeCrc()
    throws IOException {
  byte[] buffer = new byte[BUFFER_SIZE];
  Checksum checksum = new Adler32();

  for (File file : _files) {
    try (InputStream input = new FileInputStream(file)) {
      int len;
      while ((len = input.read(buffer)) > 0) {
        checksum.update(buffer, 0, len);
      }
    }
  }
  long crc = checksum.getValue();
  LOGGER.info("Computed crc = {}, based on files {}", crc, _files);
  return crc;
}
 
源代码5 项目: letv   文件: m.java
private static int a(String str, int i) {
    if (TextUtils.isEmpty(str)) {
        z.b();
        return 0;
    }
    try {
        return Integer.valueOf(str).intValue();
    } catch (Exception e) {
        z.d();
        Adler32 adler32 = new Adler32();
        adler32.update(str.getBytes());
        int value = (int) adler32.getValue();
        if (value < 0) {
            value = Math.abs(value);
        }
        value += 13889152 * i;
        return value < 0 ? Math.abs(value) : value;
    }
}
 
源代码6 项目: reladomo   文件: LZ4BlockOutputStream.java
/**
 * Create a new {@link java.io.OutputStream} with configurable block size. Large
 * blocks require more memory at compression and decompression time but
 * should improve the compression ratio.
 *
 * @param out        the {@link java.io.OutputStream} to feed
 * @param blockSize  the maximum number of bytes to try to compress at once,
 *                   must be >= 64 and <= 32 M
 * @param syncFlush  true if pending data should also be flushed on {@link #flush()}
 */
public LZ4BlockOutputStream(OutputStream out, int blockSize, boolean syncFlush)
{
    super(out);
    this.blockSize = blockSize;
    this.compressor = new LZ4HCJavaSafeCompressor();
    this.checksum = new Adler32();
    this.compressionLevel = compressionLevel(blockSize);
    this.buffer = new byte[blockSize];
    final int compressedBlockSize = HEADER_LENGTH + compressor.maxCompressedLength(blockSize);
    this.compressedBuffer = new byte[compressedBlockSize];
    this.syncFlush = syncFlush;
    o = 0;
    finished = false;
    System.arraycopy(MAGIC, 0, compressedBuffer, 0, MAGIC_LENGTH);
}
 
源代码7 项目: lucene-solr   文件: ReplicationHandler.java
public DirectoryFileStream(SolrParams solrParams) {
  params = solrParams;
  delPolicy = core.getDeletionPolicy();

  fileName = validateFilenameOrError(params.get(FILE));
  cfileName = validateFilenameOrError(params.get(CONF_FILE_SHORT));
  tlogFileName = validateFilenameOrError(params.get(TLOG_FILE));
  
  sOffset = params.get(OFFSET);
  sLen = params.get(LEN);
  compress = params.get(COMPRESSION);
  useChecksum = params.getBool(CHECKSUM, false);
  indexGen = params.getLong(GENERATION);
  if (useChecksum) {
    checksum = new Adler32();
  }
  //No throttle if MAX_WRITE_PER_SECOND is not specified
  double maxWriteMBPerSec = params.getDouble(MAX_WRITE_PER_SECOND, Double.MAX_VALUE);
  rateLimiter = new RateLimiter.SimpleRateLimiter(maxWriteMBPerSec);
}
 
源代码8 项目: dexdiff   文件: DexFileWriter.java
public static void updateChecksum(ByteBuffer buffer, int size) {
    byte[] data = buffer.array();
    MessageDigest digest;
    try {
        digest = MessageDigest.getInstance("SHA-1");
    } catch (NoSuchAlgorithmException e) {
        throw new AssertionError();
    }

    digest.update(data, 32, size - 32);
    byte[] sha1 = digest.digest();
    System.arraycopy(sha1, 0, data, 12, sha1.length);

    Adler32 adler32 = new Adler32();
    adler32.update(data, 12, size - 12);
    int v = (int) adler32.getValue();
    buffer.position(8);
    buffer.putInt(v);
}
 
源代码9 项目: nullpomino   文件: NetDummyMode.java
/**
 * NET: Send replay data<br>
 * Game modes should implement this. However, some basic codes are already implemented in NetDummyMode.
 * @param engine GameEngine
 */
protected void netSendReplay(GameEngine engine) {
	if(netIsNetRankingSendOK(engine)) {
		NetSPRecord record = new NetSPRecord();
		record.setReplayProp(owner.replayProp);
		record.stats = new Statistics(engine.statistics);
		record.gameType = netGetGoalType();

		String strData = NetUtil.compressString(record.exportString());

		Adler32 checksumObj = new Adler32();
		checksumObj.update(NetUtil.stringToBytes(strData));
		long sChecksum = checksumObj.getValue();

		netLobby.netPlayerClient.send("spsend\t" + sChecksum + "\t" + strData + "\n");
	} else {
		netReplaySendStatus = 2;
	}
}
 
源代码10 项目: j2objc   文件: Adler32Test.java
/**
 * java.util.zip.Adler32#update(byte[])
 */
public void test_update$B() {
    // test method of java.util.zip.update(byte[])
    byte byteArray[] = { 1, 2 };
    Adler32 adl = new Adler32();
    adl.update(byteArray);
    // System.out.print("value of adl"+adl.getValue());
    // The value of the adl should be 393220
    assertEquals("update(byte[]) failed to update the checksum to the correct value ",
            393220, adl.getValue());

    adl.reset();
    byte byteEmpty[] = new byte[10000];
    adl.update(byteEmpty);
    // System.out.print("value of adl"+adl.getValue());
    // The value of the adl should be 655360001
    assertEquals("update(byte[]) failed to update the checksum to the correct value ",
            655360001L, adl.getValue());

}
 
源代码11 项目: PE-HFT-Java   文件: ArrayUtil.java
public static byte[] decompressBytes(byte[] bytesArray) throws ClientException  { 
	
	byte[] checkSumBuf = new byte[8];
	checkSumBuf[0] = bytesArray[bytesArray.length-8];
	checkSumBuf[1] = bytesArray[bytesArray.length-7];
	checkSumBuf[2] = bytesArray[bytesArray.length-6];
	checkSumBuf[3] = bytesArray[bytesArray.length-5];
	checkSumBuf[4] = bytesArray[bytesArray.length-4];
	checkSumBuf[5] = bytesArray[bytesArray.length-3];
	checkSumBuf[6] = bytesArray[bytesArray.length-2];
	checkSumBuf[7] = bytesArray[bytesArray.length-1];
	
	
	ByteBuffer buffer = ByteBuffer.allocate(Long.SIZE / Byte.SIZE);
    buffer.put(checkSumBuf);
    buffer.flip();//need flip 
    long checkSum = buffer.getLong();
    
    Adler32 adler32 = new Adler32();
	adler32.update(bytesArray, 0, bytesArray.length-8);
	if(checkSum !=adler32.getValue())
		throw new ClientException("Data corruption detected - checksum failure. Please, try again.");
    
	return Snappy.uncompress(bytesArray, 0, bytesArray.length -8 );
}
 
源代码12 项目: HeyGirl   文件: DexWriter.java
private void updateChecksum(@Nonnull DexDataStore dataStore) throws IOException {
    Adler32 a32 = new Adler32();

    byte[] buffer = new byte[4 * 1024];
    InputStream input = dataStore.readAt(HeaderItem.CHECKSUM_DATA_START_OFFSET);
    int bytesRead = input.read(buffer);
    while (bytesRead >= 0) {
        a32.update(buffer, 0, bytesRead);
        bytesRead = input.read(buffer);
    }

    // write checksum, utilizing logic in DexWriter to write the integer value properly
    OutputStream output = dataStore.outputAt(HeaderItem.CHECKSUM_OFFSET);
    DexDataWriter.writeInt(output, (int)a32.getValue());
    output.close();
}
 
源代码13 项目: j2objc   文件: Adler32Test.java
/**
 * java.util.zip.Adler32#update(ByteBuffer)
 */
public void test_update$ByteBuffer() {
    // test methods of java.util.zip.update(ByteBuffer)
    // Heap ByteBuffer
    ByteBuffer byteBuffer = ByteBuffer.wrap(new byte[] {1,2,3,4});
    byteBuffer.position(2);
    assertChecksumFromByteBuffer(0xc0008, byteBuffer);

    // Direct ByteBuffer
    byteBuffer.flip();
    byteBuffer = ByteBuffer.allocateDirect(4).put(byteBuffer);
    byteBuffer.flip();
    byteBuffer.position(2);
    assertChecksumFromByteBuffer(0xc0008, byteBuffer);

    Adler32 checksum = new Adler32();
    try {            
        checksum.update((ByteBuffer)null);
        fail();
    } catch (NullPointerException expected) {}
}
 
源代码14 项目: database   文件: TestChecksumUtility.java
/**
 * Verify that the computed checksum is the same whether the buffer is
 * backed by an array or not.
 */
public void test_checksum04() {
    
    byte[] data = new byte[100];
    r.nextBytes(data);

    Adler32 adler32 = new Adler32();
    adler32.update(data);
    final int expectedChecksum = (int) adler32.getValue();

    assertEquals(expectedChecksum, chk.checksum(ByteBuffer.wrap(data), 0,
            data.length));
    
    ByteBuffer direct = ByteBuffer.allocate(data.length);
    direct.put(data);
    assertEquals(expectedChecksum, chk.checksum(direct, 0,
            data.length));
    
}
 
源代码15 项目: j2objc   文件: Adler32Test.java
/**
 * java.util.zip.Adler32#update(int)
 */
public void test_updateI() {
    // test methods of java.util.zip.update(int)
    Adler32 adl = new Adler32();
    adl.update(1);
    // The value of the adl should be 131074
    assertEquals("update(int) failed to update the checksum to the correct value ",
            131074, adl.getValue());

    adl.reset();
    adl.update(Integer.MAX_VALUE);
    // System.out.print("value of adl " + adl.getValue());
    // The value of the adl should be 16777472
    assertEquals("update(max) failed to update the checksum to the correct value ",
            16777472L, adl.getValue());

    adl.reset();
    adl.update(Integer.MIN_VALUE);
    // System.out.print("value of adl " + adl.getValue());
    // The value of the adl should be 65537
    assertEquals("update(min) failed to update the checksum to the correct value ",
            65537L, adl.getValue());

}
 
源代码16 项目: database   文件: TestChecksumUtility.java
/**
 * Verify that the computed checksum is the same whether the buffer is
 * backed by an array or not when the checksum is computed for only a region
 * of the buffer (java heap buffer version).
 */
public void test_checksum05() {

    byte[] data = new byte[100];
    r.nextBytes(data);

    Adler32 adler32 = new Adler32();
    adler32.update(data, 20, 100 - 10 - 20);
    final int expectedChecksum = (int) adler32.getValue();

    assertEquals(expectedChecksum, chk.checksum(ByteBuffer.wrap(data), 20,
            data.length - 10));

    ByteBuffer direct = ByteBuffer.allocate(data.length);
    direct.put(data);
    assertEquals(expectedChecksum, chk.checksum(direct, 20,
            data.length - 10));

}
 
源代码17 项目: tchannel-java   文件: Checksums.java
public static long calculateChecksum(CallFrame msg, long digestSeed) {

        // TODO: this is bad
        ByteBuf payloadCopy = msg.getPayload().slice();
        byte[] payloadBytes = new byte[msg.getPayloadSize()];
        payloadCopy.readBytes(payloadBytes);

        switch (msg.getChecksumType()) {

            case Adler32:
                Adler32 f = new Adler32();
                f.update((int) digestSeed);
                f.update(payloadBytes);
                return f.getValue();
            case FarmhashFingerPrint32:
            case NoChecksum:
            case CRC32C:
            default:
                return 0;
        }

    }
 
源代码18 项目: j2objc   文件: InflaterTest.java
/**
 * java.util.zip.Inflater#getAdler()
 */
public void test_getAdler() {
    // test method of java.util.zip.inflater.getAdler()
    byte dictionaryArray[] = { 'e', 'r', 't', 'a', 'b', 2, 3 };

    Inflater inflateDiction = new Inflater();
    inflateDiction.setInput(outPutDiction);
    if (inflateDiction.needsDictionary() == true) {
        // getting the checkSum value through the Adler32 class
        Adler32 adl = new Adler32();
        adl.update(dictionaryArray);
        long checkSumR = adl.getValue();
        assertEquals(
                "the checksum value returned by getAdler() is not the same as the checksum returned by creating the adler32 instance",
                inflateDiction.getAdler(), checkSumR);
    }
    inflateDiction.end();
}
 
源代码19 项目: c5-replicator   文件: EntryEncodingUtil.java
/**
 * Decode a message from the passed input stream, and compute and verify its CRC. This method reads
 * data written by the method {@link EntryEncodingUtil#encodeWithLengthAndCrc}.
 *
 * @param inputStream Input stream, opened for reading and positioned just before the length-prepended header
 * @return The deserialized, constructed, validated message
 * @throws IOException                if a problem is encountered while reading or parsing
 * @throws EntryEncodingUtil.CrcError if the recorded CRC of the message does not match its computed CRC.
 */
public static <T> T decodeAndCheckCrc(InputStream inputStream, Schema<T> schema)
    throws IOException, CrcError {
  // TODO this should check the length first and compare it with a passed-in maximum length
  final T message = schema.newMessage();
  final CrcInputStream crcStream = new CrcInputStream(inputStream, new Adler32());
  ProtobufIOUtil.mergeDelimitedFrom(crcStream, message, schema);

  final long computedCrc = crcStream.getValue();
  final long diskCrc = readCrc(inputStream);
  if (diskCrc != computedCrc) {
    throw new CrcError("CRC mismatch on deserialized message " + message.toString());
  }

  return message;
}
 
源代码20 项目: j2objc   文件: Adler32Test.java
/**
 * java.util.zip.Adler32#getValue()
 */
public void test_getValue() {
    // test methods of java.util.zip.getValue()
    Adler32 adl = new Adler32();
    assertEquals("GetValue should return a zero as a result of construction an object of Adler32",
            1, adl.getValue());

    adl.reset();
    adl.update(1);
    // System.out.print("value of adl"+adl.getValue());
    // The value of the adl should be 131074
    assertEquals("update(int) failed to update the checksum to the correct value ",
            131074, adl.getValue());
    adl.reset();
    assertEquals("reset failed to reset the checksum value to zero", 1, adl
            .getValue());

    adl.reset();
    adl.update(Integer.MIN_VALUE);
    // System.out.print("value of adl " + adl.getValue());
    // The value of the adl should be 65537
    assertEquals("update(min) failed to update the checksum to the correct value ",
            65537L, adl.getValue());
}
 
源代码21 项目: Box   文件: Dex.java
/**
 * Returns the checksum of all but the first 12 bytes of {@code dex}.
 */
public int computeChecksum() throws IOException {
    Adler32 adler32 = new Adler32();
    byte[] buffer = new byte[8192];
    ByteBuffer data = this.data.duplicate(); // positioned ByteBuffers aren't thread safe
    data.limit(data.capacity());
    data.position(CHECKSUM_OFFSET + CHECKSUM_SIZE);
    while (data.hasRemaining()) {
        int count = Math.min(buffer.length, data.remaining());
        data.get(buffer, 0, count);
        adler32.update(buffer, 0, count);
    }
    return (int) adler32.getValue();
}
 
源代码22 项目: j2objc   文件: OldAndroidChecksumTest.java
private void wrongChecksumWithAdler32Test() {
    byte[] bytes = {1, 0, 5, 0, 15, 0, 1, 11, 0, 1};
    Adler32 adler = new Adler32();
    adler.update(bytes);
    long arrayChecksum = adler.getValue();
    adler.reset();
    for (int i = 0; i < bytes.length; i++) {
        adler.update(bytes[i]);
    }
    assertEquals("Checksums not equal: expected: " + arrayChecksum +
            " actual: " + adler.getValue(), arrayChecksum, adler.getValue());
}
 
源代码23 项目: hop   文件: CheckSum.java
private Long calculCheckSum( Object[] r ) throws Exception {
  Long retval;
  byte[] byteArray;

  ByteArrayOutputStream baos = new ByteArrayOutputStream();

  // Loop through fields
  for ( int i = 0; i < data.fieldnr; i++ ) {
    if ( getInputRowMeta().getValueMeta( data.fieldnrs[ i ] ).isBinary() ) {
       baos.write( getInputRowMeta().getBinary( r, data.fieldnrs[ i ] ) );
    } else {
       baos.write( getInputRowMeta().getValueMeta( data.fieldnrs[ i ] ).getNativeDataType( r[ data.fieldnrs[ i ] ] )
          .toString().getBytes() );
    }
  }
  byteArray = baos.toByteArray();
  
  if ( meta.getCheckSumType().equals( CheckSumMeta.TYPE_CRC32 ) ) {
    CRC32 crc32 = new CRC32();
    crc32.update( byteArray );
    retval = new Long( crc32.getValue() );
  } else {
    Adler32 adler32 = new Adler32();
    adler32.update( byteArray );
    retval = new Long( adler32.getValue() );
  }

  return retval;
}
 
源代码24 项目: ghidra   文件: Adler32ChecksumAlgorithm.java
/**
 * Computes the checksum with the given options.
 * 
 * @param memory The memory to generate the checksum from.
 * @param addrSet The addresses over which to generate the checksum.
 * @param monitor Cancelable task monitor to cancel the computation.
 * @param onesComp True if the checksum should be complemented with a ones complement.
 * @param twosComp True if the checksum should be complemented with a twos complement.
 * @throws MemoryAccessException If there was a problem accessing the specified memory.
 * @throws CancelledException If checksum generation was cancelled.
 */
public void updateChecksum(Memory memory, AddressSetView addrSet, TaskMonitor monitor,
		boolean onesComp, boolean twosComp) throws MemoryAccessException, CancelledException {

	byte[] bytes = new byte[1024];
	long sum;
	try (CheckedInputStream cis =
		new CheckedInputStream(new MemoryInputStream(memory, addrSet), new Adler32())) {
		while (cis.read(bytes) > 0) {
			if (monitor.isCancelled()) {
				throw new CancelledException();
			}
		}
		sum = cis.getChecksum().getValue();
	}
	catch (IOException e) {
		throw new MemoryAccessException(e.getMessage());
	}

	if (onesComp) {
		sum = ~sum;
	}
	else if (twosComp) {
		sum = -sum;
	}
	checksum = toArray(sum, 4);
}
 
源代码25 项目: iaf   文件: ChecksumPipe.java
protected ChecksumGenerator createChecksumGenerator() throws NoSuchAlgorithmException {
	if (CHECKSUM_MD5.equals(getType())) {
		return new MessageDigestChecksumGenerator(getType());
	} else if (CHECKSUM_CRC32.equals(getType())) {
		return new ZipChecksumGenerator(new CRC32());
	} else if (CHECKSUM_ADLER32.equals(getType())) {
		return new ZipChecksumGenerator(new Adler32());
	} else if (CHECKSUM_SHA.equals(getType())) {
		return new MessageDigestChecksumGenerator(getType());
	} else {
		throw new NoSuchAlgorithmException("unsupported algorithm ["+getType()+"]");
	}
}
 
源代码26 项目: netty-4.1.22   文件: ByteBufChecksum.java
static ByteBufChecksum wrapChecksum(Checksum checksum) {
    ObjectUtil.checkNotNull(checksum, "checksum");
    if (checksum instanceof Adler32 && ADLER32_UPDATE_METHOD != null) {
        return new ReflectiveByteBufChecksum(checksum, ADLER32_UPDATE_METHOD);
    }
    if (checksum instanceof CRC32 && CRC32_UPDATE_METHOD != null) {
        return new ReflectiveByteBufChecksum(checksum, CRC32_UPDATE_METHOD);
    }
    return new SlowByteBufChecksum(checksum);
}
 
源代码27 项目: j2objc   文件: OldAndroidChecksumTest.java
private void adler32Test(byte[] values, long expected) {
    Adler32 adler = new Adler32();

    // try it all at once
    adler.update(values);
    assertEquals(adler.getValue(), expected);

    // try resetting and computing one byte at a time
    adler.reset();
    for (int i = 0; i < values.length; i++) {
        adler.update(values[i]);
    }
    assertEquals(adler.getValue(), expected);
}
 
源代码28 项目: octo-rpc   文件: ChecksumUtil.java
public static byte[] genAdler32ChecksumBytes(byte[] bytes) {
    Adler32 a32 = new Adler32();
    a32.update(bytes, 0, bytes.length);
    int sum = (int) a32.getValue();
    byte[] checksum = new byte[4];
    checksum[0] = (byte) (sum >> 24);
    checksum[1] = (byte) (sum >> 16);
    checksum[2] = (byte) (sum >> 8);
    checksum[3] = (byte) (sum);
    return checksum;
}
 
源代码29 项目: cassandra-backup   文件: SSTableUtils.java
public static String calculateChecksum(final Path filePath) throws IOException {
    try (final FileChannel fileChannel = FileChannel.open(filePath)) {

        int bytesStart;
        int bytesPerChecksum = 10 * 1024 * 1024;

        // Get last 10 megabytes of file to use for checksum
        if (fileChannel.size() >= bytesPerChecksum) {
            bytesStart = toIntExact(fileChannel.size()) - bytesPerChecksum;
        } else {
            bytesStart = 0;
            bytesPerChecksum = (int) fileChannel.size();
        }

        fileChannel.position(bytesStart);
        final ByteBuffer bytesToChecksum = ByteBuffer.allocate(bytesPerChecksum);
        int bytesRead = fileChannel.read(bytesToChecksum, bytesStart);

        assert (bytesRead == bytesPerChecksum);

        // Adler32 because it's faster than SHA / MD5 and Cassandra uses it - https://issues.apache.org/jira/browse/CASSANDRA-5862
        final Adler32 adler32 = new Adler32();
        adler32.update(bytesToChecksum.array());

        return String.valueOf(adler32.getValue());
    }
}
 
源代码30 项目: java-n-IDE-for-Android   文件: Dex.java
/**
 * Returns the checksum of all but the first 12 bytes of {@code dex}.
 */
public int computeChecksum() throws IOException {
    Adler32 adler32 = new Adler32();
    byte[] buffer = new byte[8192];
    ByteBuffer data = this.data.duplicate(); // positioned ByteBuffers aren't thread safe
    data.limit(data.capacity());
    data.position(CHECKSUM_OFFSET + CHECKSUM_SIZE);
    while (data.hasRemaining()) {
        int count = Math.min(buffer.length, data.remaining());
        data.get(buffer, 0, count);
        adler32.update(buffer, 0, count);
    }
    return (int) adler32.getValue();
}
 
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