processing URLs in post?

[sensovision]

Hi! can anyone point me to the file(or even place) where URLs in the post are processed I mean where they get "a href" tag?
Thanks in advance!

[sensovision]

I've manage to find this part of code myself.
In case if someone would look for same info it's in subs.php
Just search for this code:

if (!isset($disabled['url']) && (strpos($data, '://') !== false || strpos($data, 'www.') !== false))