100% (was: [PATCH] diffcore-rename: favour identical basenames)

From: David Kastrup <dak@gnu.org>
Date: Jun 22, 2007, 10:52 UTC
Message-ID: <86ps3oi7ma.fsf_-_@lola.quinscape.zz>
In-Reply-To: <Pine.LNX.4.64.0706221122200.4059@racer.site>

Show 12 quoted lines

> Footnote:
>
> *1* Actually, it is not _that_ bad. The score is not a value between 0 and 
>     100, IOW it is _not_ what you see in the output of "diff -M". It is an 
>     unsigned short between 0 and MAX_SCORE, which is defined in 
>     diffcore.h as 60000.0.
>
>     The Levenshtein distance between two filenames cannot be larger than 
>     the sum of their lengths, so it should be relatively safe. That is, if 
>     you don't have such insanely long paths as e.g. egit. But even there, 
>     the paths share most of their directories, and therefore the distances 
>     should be much, much smaller in real life.

As a note aside: would it be possible to always round downwards when computing similarities or converting between them?

I very much would like to see the 100% figure reserved for identity. This is particularly relevant when interpreting the output of git-diff --name-status with regard to R100, C100 and similar flags.

-- 
David Kastrup