Examples with Checksum java.util.zip.Checksum used on opensource projects

Example 76 with Checksum

use of java.util.zip.Checksum in project kafka by apache.

the class Crc32C method compute.

/**
 * Compute the CRC32C (Castagnoli) of the segment of the byte array given by the specified size and offset
 *
 * @param bytes The bytes to checksum
 * @param offset the offset at which to begin the checksum computation
 * @param size the number of bytes to checksum
 * @return The CRC32C
 */
public static long compute(byte[] bytes, int offset, int size) {
    Checksum crc = create();
    crc.update(bytes, offset, size);
    return crc.getValue();
}

Example 77 with Checksum

use of java.util.zip.Checksum in project kafka by apache.

the class ChecksumsTest method doTestUpdateByteBuffer.

private void doTestUpdateByteBuffer(byte[] bytes, ByteBuffer buffer) {
    buffer.put(bytes);
    buffer.flip();
    Checksum bufferCrc = Crc32C.create();
    Checksums.update(bufferCrc, buffer, buffer.remaining());
    assertEquals(Crc32C.compute(bytes, 0, bytes.length), bufferCrc.getValue());
    assertEquals(0, buffer.position());
}

Example 78 with Checksum

use of java.util.zip.Checksum in project kafka by apache.

the class ChecksumsTest method testUpdateInt.

@Test
public void testUpdateInt() {
    final int value = 1000;
    final ByteBuffer buffer = ByteBuffer.allocate(4);
    buffer.putInt(value);
    Checksum crc1 = Crc32C.create();
    Checksum crc2 = Crc32C.create();
    Checksums.updateInt(crc1, value);
    crc2.update(buffer.array(), buffer.arrayOffset(), 4);
    assertEquals(crc1.getValue(), crc2.getValue(), "Crc values should be the same");
}

Example 79 with Checksum

use of java.util.zip.Checksum in project kafka by apache.

the class Crc32CTest method testUpdate.

@Test
public void testUpdate() {
    final byte[] bytes = "Any String you want".getBytes();
    final int len = bytes.length;
    Checksum crc1 = Crc32C.create();
    Checksum crc2 = Crc32C.create();
    Checksum crc3 = Crc32C.create();
    crc1.update(bytes, 0, len);
    for (int i = 0; i < len; i++) crc2.update(bytes[i]);
    crc3.update(bytes, 0, len / 2);
    crc3.update(bytes, len / 2, len - len / 2);
    assertEquals(crc1.getValue(), crc2.getValue(), "Crc values should be the same");
    assertEquals(crc1.getValue(), crc3.getValue(), "Crc values should be the same");
}

Example 80 with Checksum

use of java.util.zip.Checksum in project iris by chicc999.

the class Message method getBodyCRC.

public long getBodyCRC() {
    if (bodyCRC == 0) {
        if (body != null && body.length > 0) {
            Checksum checksum = new Adler32();
            checksum.update(body, 0, body.length);
            bodyCRC = checksum.getValue();
        }
    }
    return bodyCRC;
}