commit 509e36f5d11c36bf47107c83646dfad3f4393efc
author Mike Burrows <m3b@google.com> Mon Jun 15 18:16:57 2015 -0700
committer Mike Burrows <m3b@google.com> Mon Jun 15 18:17:00 2015 -0700
tree 040860fcb2a8758766776a3bae27b6b805f914d6
parent 2752a7edc72101fcaa82759e9a072bb1ac86b2f4

v.io/syncbase/x/ref/services/syncbase/localblobstore/crc64window: Introduce means for computing CRCs over sliding windows.

Introduce package crc64window, which computes CRCs over fixed-sized sliding windows of bytes.
The intent is to use this to break blobs into chunks at content-dependent boundaries.

The CRCs generated are the same as those currently generated by Go's
hash/crc64.  Unfortunately, hash/crc64 doesn't actually specify the
representation and conditioning it uses, but I assume it's unlikely to change.

Change-Id: Ia9a541b7b5642db5dddcb943453e94f89ed454f6