Re: Cocoa-dev Digest, Vol 1, Issue 330

FROM : Joe Chan
DATE : Fri Nov 26 22:16:28 2004

Um, if I understand your question correctly, you're asking how to use C
functions? You do something like this:

regex_t    myRegex;
int err = regcomp(&myRegex, myExpr, REG_EXTENDED);


On Nov 26, 2004, at 3:29 PM, <email_removed> wrote:

> Date: Fri, 26 Nov 2004 18:44:57 +0000
> From: Oliver Cameron <<email_removed>>
> Subject: Using regex.h
> To: <email_removed>
> Message-ID: <<email_removed>>
> Content-Type: text/plain; charset=US-ASCII; format=flowed
>
> Hi guys,
>
> Not sure if my other mail got through to the list, so I'll try again.
>
> I've been told I can use regex.h for powering the regular expression
> searches in my app. I'm never actually touched pure C code (is regex.h
> C?), so I've really got no idea how to implement it in a Cocoa based
> application.
>
> I did a 'man regex' in the Terminal and gave it a read. Seems I have to
> do:
>
> #include <regex.h>
>
> I also realised there are 4 functions, but I only need to use 2. I seem
> to need to provide regcomp with a regular expression string, it will
> then transform that into a internally structured correct one. I then
> need to pass that and the string I want to parse into regexec.
>
> I understand all the theory work, but I'm still at a lost as to how to
> use these functions, for example, in Obj-C, I would do something like:
>
> NSString *hello = [regex parseString:@"hello"
> withExpression:expression];
>
> Any sort of C method example could help a lot.
>
> I guess I could use NSTask, but I think that could cause major
> slowdowns. I also know about the OmniFrameworks and others (MOKit
> etc.), but I'd rather cook up my own engine if possible. Any help is
> appreciated.
>
> Thanks,
> Oliver
>