[PATCH 1 of 3 v4] store: implement fncache path mangling code in C

[Bryan O'Sullivan]

On Fri, Sep 7, 2012 at 12:07 PM, Adrian Buehlmann <adrian at cadifra.com>wrote:

> Bryan, can I ask you what "slop" means?
>

In this context, it means "leftovers". It serves the same purpose as this
code in store.py:
http://selenic.com/repo/hg/file/3ee5d3c372fa/mercurial/store.py#l218

If I would have had to write such kind of code, I would be almost 100%
> sure *I* would have (unintentionally) inserted at least 5 bugs in it.
>

Me too, since I fixed about that many while writing it, mainly due to all
the extra test cases you added to test-hybridencode.py.

I'm not certain there are no remaining bugs, but the current code is quite
a lot closer to correct.

I'll be writing a fuzz tester to exercise this code further.
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