Data Profiler enhancement to implement hashing

[hdalsania]

Data Editor Enhancement: Data Hashing

Implement functionality to add data hashing within the Data Editor. The hashable data targets are the segments listed below for both unapplied data changes and on-disk data content.

• Whole file
• Selected viewport data
• Current unapplied viewport data changes.

[stricklandrbls]

@JeremyYao @hdalsania @scholarsmate - Given that the Omega Edit server can essentially create and serve viewports for files of infinite size, are we sure that we want to obtain a hash for entire file contents?

I have a current implementation which obtains data segments of the target file in block sizes of 65535 bytes. Obtaining a hash for even a relatively small file takes about 15 seconds when hashing a 135MB file.

This, of course, isn't ideal for obtaining whole file hashes every time data has been changed from the Data Editor. Whether it be local in-memory changes or on disk.

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I'd think the better option would be to provide local & on-disk hashes for related viewports obtained from Omega Edit instead.

Thoughts?