On Tue, Apr 19, 2016 at 05:24:00PM +0100, Pete Cordell wrote:
> I've tried to reduce the patterns that I reported earlier to a minimal form.
> For the timestamp pattern I've ended up with:
>
> =>ab?c{0,1}
> #fails
> a
> #ok
> ab
> abc
> ac
Ok that's something I need to look at and fix, bugs in the regexp code
aren't the most trivial ones, but gives opportunity to make state graphs
I will try to get this fixed for coming release :-)
thanks,
Daniel
> Interesting the following patterns all pass, even though conceptually they
> are the same pattern. So I guess there is a difference between handling c?
> and c{0,1}. That might give a clue as to how to fix the problem.
>
> =>ab?c?
> a
> ab
> abc
> ac
> =>ab{0,1}c{0,1}
> a
> ab
> abc
> ac
> =>ab{0,1}c?
> a
> ab
> abc
> ac
> =>ab?c{1,2}
> ac
> abc
> abcc
> acc
>
> For the IP address pattern, the simplest I could get it is to:
>
> =>((2{1,2}|24)\.){2}2
> #fails
> 24.24.2
>
> If it would help to have these in the form of a Git patch or some other
> format let me know.
>
> Thanks,
>
> Pete.
> --
> ---------------------------------------------------------------------
> Pete Cordell
> Codalogic Ltd
> Read & write XML in C++: http://www.xml2cpp.com
> ---------------------------------------------------------------------
>
> On 15/04/2016 17:48, Pete Cordell wrote:
> > Hi there,
> >
> > Please can I submit the following regexp test files that should pass,
> > but when I test them they fail. (I'm afraid I'm not smart enough to
> > suggest how to fix the code!)
> >
> > I've attached them and included a git patch so hopefully one of the
> > formats is convenient for you. If not, let me know what would work
> > better. I've included them inline below so you can do a quick scan.
> >
> > test/regexp/fussyipaddress
> > --------------------------
> > =>((1?[0-9]{1,2}|2[0-4][0-9]|25[0-5])\.){3}(1?[0-9]{1,2}|2[0-4][0-9]|25[0-5])
> >
> > 192.168.254.0
> >
> > test/regexp/timestamp
> > ---------------------
> > =>\d{8}T\d{6}\.?\d{0,6}
> > # This gives incorrect result
> > 20160412T112319
> > # These give correct result
> > 20160412T112319.
> > 20160412T112319.43
> > 20160412T112319.432312
> >
> > Thanks,
> >
> > Pete.
> >
> >
> > _______________________________________________
> > xml mailing list, project page http://xmlsoft.org/
> > xml@gnome.org
> > https://mail.gnome.org/mailman/listinfo/xml
> >
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--
Daniel Veillard | Open Source and Standards, Red Hat
veill...@redhat.com | libxml Gnome XML XSLT toolkit http://xmlsoft.org/
http://veillard.com/ | virtualization library http://libvirt.org/
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