Re: Q: av_push

[muppet]

On Sep 17, 2004, at 5:32 AM, Reinhard Pagitsch wrote:
Nick Ing-Simmons wrote:
Reinhard Pagitsch <[EMAIL PROTECTED]> writes:
I not want to pass an arry to my XS, I want to get back an array.
Why? Perl's split is very flexible and well optimized for creating  
perl arrays from strings.

Because I load a binary file and parse its content. The file has  
records which I have to parse for specific informations which I do in  
a XS function. If I could call the split from my XS function maybe I  
could use it.
what you describe still doesn't preclude using perl's split.
   sub get_record_as_ary {
      # an xs function parses the record from the file, converts
      # ebcdic to ascii, and replaces junk with whitespace.
      my $string = _get_record_as_string ();
      # now tokenize on the whitespace and return the pieces.
      return split /\s+/, $string;
   }
you *can* use perl's split from xs, but it's not very fun --- you have  
to basically set up the stack and use eval_pv(), which is a lot harder  
than just returning the string and manipulating it in perl.

the function warn_of_ignored_exception() in  
http://cvs.sourceforge.net/viewcvs.py/gtk2-perl/gtk2-perl-xs/Glib/ 
GClosure.xs?rev=1.30&view=auto (near the bottom)  illustrates the kinds  
of hoops you have to jump through to use perl's native regex  
substitutions from C/XS.

it's a well-accepted practice to put in XS only the stuff you can't do  
in perl (or can't do as easily), and wrap that up with perl  
subroutines.

--
Holy crap, dude, we have kids!
        -- Elysse, six days after giving birth to twins