in reply to double array in XS

Here's my actual working XSUB btw: 
void
something(input, ...)
        CODE:

        double *input = (double *) alloca((sizeof(double)) * (items-1)
+);

        for(int i=0; i<(items-1); i++)
            input[i] = (double) SvNV(ST(i+1));

        THIS->something(input);

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(tye)Re2: double array in XS
by tye (Sage) on Nov 02, 2000 at 21:43 UTC

    Note that alloca() is not as portable as one might hope. I find it very useful in XS code, but avoid it (now) because it would make my modules less portable. ):

    I try to replace it with creating SVs with PV buffers of the proper size and letting Perl's garbage collection free the buffers for me.

            - tye (but my friends call me "Tye")
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