Examples of Adler32

com.sleepycat.je.utilint.Adler32
Adler32 checksum implementation. This class is used rather than the native java.util.zip.Adler32 class because we have seen a JIT problem when calling the Adler32 class using the Server JVM on Linux and Solaris. Specifically, we suspect this may be Bug Parade number 4965907. See SR [#9376]. We also believe that this bug is fixed in Java 5 and therefore only use this class conditionally if we find that we're in a 1.4 JVM. [#13354]. The Adler32 checksum is discussed in RFC1950. The sample implementation from this RFC is shown below:
```
 #define BASE 65521  largest prime smaller than 65536 unsigned long update_adler32(unsigned long adler, unsigned char *buf, int len) { unsigned long s1 = adler & 0xffff; unsigned long s2 = (adler >> 16) & 0xffff; int n; for (n = 0; n < len; n++) { s1 = (s1 + buf[n]) % BASE; s2 = (s2 + s1)     % BASE; } return (s2 << 16) + s1; } unsigned long adler32(unsigned char *buf, int len) { return update_adler32(1L, buf, len); } 
```
The NMAX optimization is so that we don't have to do modulo calculations on every iteration. NMAX is the max number of additions to make before you have to perform the modulo calculation.
java.util.zip.Adler32
A class that can be used to compute the Adler-32 checksum of a data stream. An Adler-32 checksum is almost as reliable as a CRC-32 but can be computed much faster. @see Checksum @version 1.29, 11/17/05 @author David Connelly

Examples of com.sleepycat.je.utilint.Adler32

     * of the bytes representing the concatenation of the key/value pair.
     * 
     * @return the checksum
     */
    public static int getXi(byte[] keyValue) {
        Adler32 adler32 = new Adler32();
        adler32.update(keyValue, 0, keyValue.length);
        return (int) adler32.getValue();
    }

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Examples of com.sleepycat.je.utilint.Adler32


        /* DatabaseEntry represents the key and data of each record. */
        DatabaseEntry key = new DatabaseEntry();
        DatabaseEntry data = new DatabaseEntry();
        /* Adler32 to compute the rolling checksum of key/data pair. */
        Adler32 adler32 = new Adler32();
        int i = 0;
        int a = 0, b = 0;
        md.reset();
        Block block = new Block(blockId);


        /* Please pay attention to the check order in while loop. */
        while ((i < numKeys) &&
               (cursor.getNext(key, data, LockMode.DEFAULT) ==
                OperationStatus.SUCCESS)) {
            /* Indicates having a new block. */
            if (i == 0) {
                block.setBeginKey(key.getData());
                block.setBeginData(data.getData());
            }


            /* Calculate rollingChksum on "key|data" bytes. */
            adler32.reset();
            adler32.update(key.getData(), 0, key.getData().length);
            adler32.update(data.getData(), 0, data.getData().length);
            final int xi = (int) adler32.getValue();
            a += xi;
            b += a;
            /* Update MessageDigest with "key|data" bytes. */
            md.update(key.getData());
            md.update(data.getData());

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Examples of com.sleepycat.je.utilint.Adler32

     * algorithm to logically use 32 bit bytes.
     */
    private void setChecksum() {


        /* Adler32 to compute the rolling checksum of key/data pair. */
        Adler32 adler32 = new Adler32();


        int a = 0, b = 0;
        for (int i = 0; i < size(); i++) {
            byte[] element = window.get(i);
            adler32.reset();
            adler32.update(element, 0, element.length);
            final int xi = (int) adler32.getValue(); /* It's really 32 bits */
            a += xi;
            b += (xi * (size() - i));
        }
        chksum = (a & LDiffUtil.MASK_32BIT) | ((long) b << 32);
    }

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Examples of java.util.zip.Adler32

      prop.put("filewatcher.lockExtention", "*.lck");
      doPublish(prop, deliverDat, deliverGif, absSubPath);
   }
   
   long getChecksum(InputStream is) throws IOException {
      CheckedInputStream cis = new CheckedInputStream(is, new Adler32());
      byte[] tempBuf = new byte[128];
      while (cis.read(tempBuf) >= 0) {
      }
      return cis.getChecksum().getValue();
   }

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Examples of java.util.zip.Adler32

         throw new IOException(Messages.getString("ApplicationLauncher.tunnelRequiredButNoEventHandler")); //$NON-NLS-1$
    }


    private long generateChecksum(File f) throws IOException {


        Adler32 alder = new Adler32();
        CheckedInputStream in = new CheckedInputStream(new FileInputStream(f), alder);
        try {
            byte[] buf = new byte[4096];
            int read = 0;
            while ((read = in.read(buf)) > -1)
                ;


            alder = (Adler32) in.getChecksum();


            return alder.getValue();
        } finally {
            in.close();
        }
    }

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Examples of java.util.zip.Adler32

     * @param f
     * @return long
     * @throws IOException
     */
    public static long generateChecksum(File f) throws IOException {
        Adler32 alder = new Adler32();
        FileInputStream fin = new FileInputStream(f);
        CheckedInputStream in = new CheckedInputStream(fin, alder);
        byte[] buf = new byte[32768];
        Util.readFullyIntoBuffer(in, buf);
        alder = (Adler32) in.getChecksum();
        try {
            in.close();
        } catch (IOException ex) {
        }
        try {
            fin.close();
        } catch (IOException ex1) {
        }
        return alder.getValue();
    }

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Examples of java.util.zip.Adler32

    {
      inStream = new FileInputStream(file);
      long size = file.length();
      CRC32 crc32 = null;
      MessageDigest md = null;
      Adler32 adler32 = null;
      if (algo.equalsIgnoreCase("CRC32"))
        crc32 = new CRC32();
      else if (algo.equalsIgnoreCase("Adler32"))
        adler32 = new Adler32();
      else md = MessageDigest.getInstance(algo);
      byte [] buf = new byte[BUF_SIZE];
      int readed = -1;
      if (listener != null) listener.notify(new ProgNotify(ProgNotify.START, 0, new Long(size).toString()));
      long total = size;
      boolean bAbort = false;
      while(size != 0)
      {
        if ((readed = inStream.read(buf)) >= 0)
        {
          if (crc32 != null) crc32.update(buf, 0, readed);
          else if (adler32 != null)  adler32.update(buf, 0, readed);
          else md.update(buf, 0, readed);
          
          assert size <= readed;
          size -= readed;
          if (listener != null)
          {
            if (bAbort = listener.notify(new ProgNotify(ProgNotify.RUN, (int)(1000L - (size*1000L)/total), null)))
              break;
          }
        }
        else break;
      }
      if (bAbort)
      {
        if (listener != null) listener.notify(new ProgNotify(ProgNotify.ABORT, 0, null));
      }
      else
      {
        if (crc32 != null) m_byteArray = longToByteArray4(crc32.getValue());
        else if (adler32 != null) m_byteArray = longToByteArray4(adler32.getValue());
        else m_byteArray = md.digest();
      
        int index = 0;
        StringBuilder str = new StringBuilder();
        String temp = null;

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Examples of java.util.zip.Adler32

     * @param adler the number to use as starting point for the Adler-32 algorithm
     */
    public Adler32Ext(final int adler) {
        super();
        this.adler=adler;
        this.intern = new Adler32();
        setAdlerRef(this.adler);
    }

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Examples of java.util.zip.Adler32

        ? LZ4Factory.fastestInstance().fastCompressor()
        : LZ4Factory.fastestInstance().highCompressor();
    final Checksum checksum;
    switch (randomInt(2)) {
    case 0:
      checksum = new Adler32();
      break;
    case 1:
      checksum = new CRC32();
      break;
    default:

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Examples of java.util.zip.Adler32

          System.out.println("EOF reached after " + count + " txns.");
        }


        return;
      }
      Checksum crc = new Adler32();
      crc.update(bytes, 0, bytes.length);
      if (crcValue != crc.getValue())
      {
        throw new IOException("CRC doesn't match " + crcValue + " vs "
            + crc.getValue());
      }
      InputArchive iab = BinaryInputArchive
          .getArchive(new ByteArrayInputStream(bytes));
      TxnHeader hdr = new TxnHeader();
      Record txn = SerializeUtils.deserializeTxn(iab, hdr);

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