Package com.sleepycat.je.utilint

Examples of com.sleepycat.je.utilint.Adler32.update()

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

    public static Block readBlock(int blockId, Cursor cursor, int numKeys)
        throws DatabaseException {
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                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. */
 
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            }

            /* 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());
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        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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        /* Add the prev pointer */
        destBuffer.position(HEADER_PREV_OFFSET);
        LogUtils.writeUnsignedInt(destBuffer, lastOffset);

        /* Now calculate the checksum and write it into the buffer. */
        checksum.update(destBuffer.array(), CHECKSUM_BYTES,
                        (entrySize - CHECKSUM_BYTES));
        destBuffer.position(0);
        LogUtils.putUnsignedInt(destBuffer, checksum.getValue());

        /* Leave this buffer ready for copying into another buffer. */
 
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