"Rolling Hash computation" or "Content Defined Chunking"

[notna via Digitalmars-d-learn]

Hi Dlander's.

Found some interesting reads ([1] [2] [3]) about the $SUBJECT and 
wonder if there is anything available in the Dland?!

If yes, pls. share.
If not, how could it be done (D'ish)

[1] - 
https://moinakg.wordpress.com/2013/06/22/high-performance-content-defined-chunking/
     - 
https://github.com/moinakg/pcompress/blob/master/rabin/rabin_dedup.c

[2] - 
https://restic.github.io/blog/2015-09-12/restic-foundation1-cdc

[3] - http://www.infoarena.ro/blog/rolling-hash

Thanks & regards