Re: zero delta changes

On 08/03/07, Donovan Baarda <[email protected]> wrote:
]> > I need to know how I can detect a zero change delta ( ie a delta that
> > signifies that no change is required)
> >
> > I am attaching some "zero change" deltas.
>
> A zero change delta consists of a "single copy" command. This command
> includes a length, so you will get different "zero delta" files for
> different length files. You also get a "single copy" command for a file
> that has been truncated, so it's not that trivial to check if the single
> copy command is really a "zero delta" or a truncation.

If I recall correctly you can ask for statistics which will tell you
there are no literal insertions, but this does not quite tell you that
there are no deletions or rearrangements.  Maybe you can get the
whole-file hash from the header?

-- 
Martin

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