RFR JDK-6321472: Add CRC-32C API

Staffan Friberg staffan.friberg at oracle.com
Fri Oct 17 01:42:02 UTC 2014


This RFE adds a CRC-32C class. It implements Checksum so it will have 
the same API CRC-32, but use a different polynomial when calculating the 
CRC checksum.

CRC-32C implementation uses slicing-by-8 to achieve high performance 
when calculating the CRC value.

A part from adding the new class, java.util.zip.CRC32C, I have also 
added two default methods to Checksum. These are methods that were added 
to Adler32 and CRC32 in JDK 8 but before default methods were added, 
which was why they were only added to the implementors and not the 

Bug: https://bugs.openjdk.java.net/browse/JDK-6321472
Webrev: http://cr.openjdk.java.net/~sfriberg/JDK-6321472/webrev.00

I have started a CCC request for the changes, but was asked to get 
feedback from the core libs group before finalizing the request in case 
there are any API or Javadoc changes suggested.


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