Is not string manipulation is not applicable in your case?

A very simplistic way:
1. Check if the URL starts with "http://" or by the given base URL
2. If not, copy the base URL and then the relative URL with a '/' separator

But things can be much more complicated than this... Relative URL can
contain leading slashes to indicate to starting from the wwwroot, or "../"
or something like that to relative from the current directory etc. You may
also need to handle these too but I do not think if there is anything which
cannot be handled by normal string manipulation.

You may can also try to port a regex engine and then adopting the Perl
examples you found, however, it may need much more resources than would
easily fit into your chip -- I have never tried this one so someone else may
have a better thoughts on it.

Tamas


On Wed, May 27, 2009 at 11:43 PM, Harold Hallikainen <harold@hallikainen.org
> wrote:

> After the recent discussion of regular expressions, I, of course, today
> ran in to an application for them, but I have to do this in C30 for a
> PIC24. I need to change a relative URL (given the base URL) to an absolute
> URL. Everything I'm finding is pretty much using regular expressions in
> perl or PHP. Anyone have any other ideas?
>
> I'll search on...
>
> Thanks!
>
> Harold
>
>
>
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