[Fontconfig-bugs] [Bug 101889] Make fontconfig cache relocatable

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101889

--- Comment #14 from Behdad Esfahbod <freedesktop at behdad.org> ---
(In reply to Alexander Larsson from comment #11)
> You probably want to change how filenames are stored in the cache (not that
> i know how it works now), so that filename values are indexes into an array
> of offsets. 
> Then when you're rewriting filenames you can use the index with an in-memory
> array of (rewritten) strings instead.
> 
> That would make it simple to do the rewrites too. You don't have to scan the
> entire cache, just rewrite everything in that table.

I was under the impression that FcPattern is public struct.  I'm truly relieved
to learn that I was wrong.  It's FcValue that is public, but not FcPattern. 
So, yes, we can do all sort of things.  I know what we need to do... I'll write
here in a bit.

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