[yunqa.de] Re: Access violation calling DIPerlRegEx.Match
- From: Delphi Inspiration <delphi@xxxxxxxx>
- To: yunqa@xxxxxxxxxxxxx
- Date: Thu, 27 May 2010 22:09:03 +0200
At 02:22 27.05.2010, Jim Bretti wrote:
>I'm getting an access violation from DIPerlRegEx.Match when using the
>following subject / match pattern:
I could reduce this to the following:
Subject: für
Pattern: \p{Zs}*\R
The problem shows for the Umlaut letter 'ü' (but not 'ä') and requires both
'/p{Zs}*' and '\R'. At a quick glance this looks like a PCRE problem. I will
investigate further tomorrow.
Not just as a workaround but as the recommended way of handling Umlauts with
DIRegEx, you should set the coUtf8 compile time option and pass both subject
and pattern as UTF-8 encoded strings.
Doing gets rid of the problem. But even more important, it guarntees that your
Umlaut characters are handled correctly, especially that non-ASCII Unicode
character properties can be properly determined.
Thanks for the well done demo project. I will keep you posted on any progress
concerning this bug.
Ralf
>Subject:
>Das malerische Bild der Stadt ist durch sanfte Hügel geprägt. Sehr bekannt für
>Oxford sind auch seine Rudermannschaften, die
>jedes Jahr gegen die von Cambridge auf der Themse ins Rennen gehen.
>
>Match Pattern:
>(?<=[\pL\pN\pP])\p{Zs}*\R\p{Zs}*(?=[\pL\pN\pP])
>
>So the following code fails when memo1 and memo2 are loaded with the above
>subject and match pattern:
>
> RE := TDIPerlRegEx.Create(Self);
> RE.SetSubjectStr(Memo1.Text);
> RE.CompileMatchPattern(Trim(Memo2.Text));
> If RE.Match > 0 then
>
>Seems like it might have something to do with umlauts in the subject (ü, ä)
>together with the Zs property code in the match pattern. Do I need to set any
>compile / match options for these characters in the subject string?
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