[pcre-dev] [Bug 632] pcre_compile has no way to give length …

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Szerző: Sean Middleditch
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Címzett: pcre-dev
Tárgy: [pcre-dev] [Bug 632] pcre_compile has no way to give length of source
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http://bugs.exim.org/show_bug.cgi?id=632




--- Comment #6 from Sean Middleditch <elanthis@???> 2007-11-20 19:31:58 ---
(In reply to comment #5)
> I wonder if and/or how much these changes will affect performance? Hard
> to say until one has tried it, I suppose.


I don't think it'll be much of a hit. Granted, avoiding the one extra copy in
my target use case probably isn't going to make a huge impact, either.

To be honest, I'm more worried about code complexity. If all these extra
pointer checks make the code significanly uglier, I don't think it'll be worth
merging a patch to add them. The one extra copy is something I'd like to
avoid, but not if it'll make your maintenance work a lot harder.

> > Most of the functions just need to take a copy of the end pointer.
>
> The *internal* functions should not need this if they have the "cd"
> (compile data) variable passed to them, because cd->pattern_end has the
> required value.


Ah, alright. I only managed to get to a couple of functions so far - still
getting used to the codebase.


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