com.google.appengine.api.files
Class Crc32c

java.lang.Object
  com.google.appengine.api.files.Crc32c

All Implemented Interfaces:

java.util.zip.Checksum

public final class Crc32c
extends java.lang.Object
implements java.util.zip.Checksum

This class generates a CRC32C checksum, defined by rfc3720 section B.4.

Constructor Summary

Crc32c()

Method Summary

long	getValue() Returns the value of the checksum.
void	reset() Resets the crc.
void	update(byte[] bArray, int off, int len) Updates the checksum with an array of bytes.
void	update(int b) Updates the checksum with a new byte.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Crc32c

public Crc32c()

Method Detail

update

public void update(int b)

Updates the checksum with a new byte.

Specified by:

update in interface java.util.zip.Checksum

Parameters:

b - the new byte.

update

public void update(byte[] bArray,
                   int off,
                   int len)

Updates the checksum with an array of bytes.

Specified by:

update in interface java.util.zip.Checksum

Parameters:

bArray - the array of bytes.

off - the offset into the array where the update should begin.

len - the length of data to examine.

getValue

public long getValue()

Returns the value of the checksum.

Specified by:

getValue in interface java.util.zip.Checksum

Returns:

the value of the checksum.

reset

public void reset()

Resets the crc.

Specified by:

reset in interface java.util.zip.Checksum