Examples of PCRE library in C

Centinul · 08-29-2006, 04:21 PM

Anyone have any links or examples of PCRE library usage in C? I've been hunting the net for them and all I can find is documentation on the API itself. It would be helpful to have an example or two. Thanks!

xhi · 08-30-2006, 09:25 AM

man pcresample

(well that should have been obvious

)

and

Centinul · 08-30-2006, 03:06 PM

lol didn't even think of that. Thanks for the link. I've been reading that thing up and down trying to wrap my head around how to use it. I'm just about there. Only one issue left

Thanks!

Unfortunately I don't know where the sample file they reference is

xhi · 08-30-2006, 03:15 PM

hmm. i dont know where it would be. a quick search showed that i have it in several places. it looks like the demo comes with php, apache, and also subversion.

if you have the source for any of those it should be in there. otherwise you could just download the pcre source..

Centinul · 08-30-2006, 04:59 PM

Ya that's what I figured. Maybe I'll do that. Have you ever used this library?

xhi · 08-30-2006, 05:08 PM

only briefly. i was going to use it for some config file parsing, but passed on it. regex was just more than i needed for name value pairs that i had in the config file.

Centinul · 08-30-2006, 07:09 PM

It's good to know that someone else has played with it, if I have any questions

fakie_flip · 09-26-2010, 01:07 PM

Quote:

Originally Posted by Centinul

lol didn't even think of that. Thanks for the link. I've been reading that thing up and down trying to wrap my head around how to use it. I'm just about there. Only one issue left

Thanks!

Unfortunately I don't know where the sample file they reference is

after you do the man pcresample, as he told you to, you see that an example source code file name. Then:

locate pcredemo.c
find / -name pcredemo.c

for me, /usr/share/doc
I like that folder so much I added it to my gnome favorites/bookmarks in nautilus.

Sergei Steshenko · 09-26-2010, 03:19 PM

Quote:

Originally Posted by Centinul

Anyone have any links or examples of PCRE library usage in C? I've been hunting the net for them and all I can find is documentation on the API itself. It would be helpful to have an example or two. Thanks!

The library comes with 'pcregrep' - that is, of course, an obvious source of examples.

bigearsbilly · 09-26-2010, 05:16 PM

I've used the C++ interface.
When I installed the package (on FreeBSD) it came with loads of HTML
documentation. I found it easy to grasp what I needed from it.

see fakie_flip's post eh?

have you checked if you have docs
maybe /usr/share/doc/pcre ?

BTW amazingly it's still not as fast as perl.
I've tried boost::regex, regex and pcre.

Sergei Steshenko · 09-26-2010, 05:55 PM

Quote:

Originally Posted by bigearsbilly

...
BTW amazingly it's still not as fast as perl.
...

Just read comments in Perl proper RE engine - they tried to optimize everything.

bigearsbilly · 09-27-2010, 05:13 AM

Perl isn't just faster, It actually mashes C++ on regexes.
amazing really. I've done quite a bit of experimenting recently,
started with Boost, then std C libregex then PCRE.

always perl is significantly faster.

mainly using perl splitting into a list compared to C++ splitting into a vector of strings.
(the sort of stuff one needs in the real world)
even cheating in C++ and just printing results without assigning to data structures didn't
beat perl.
it's quite impressive.