The easiest way to access arrays and hashes when you are using Inline C or XS is to pass by reference and use the access macros to get at the values. Here is a trivial example to get you started. 

use Inline 'C';

print multiply( [ 1,2,3,4 ] );

__END__
__C__

double
multiply( SV * terms )
{
    I32 numterms = 0;
    int i;
    double result;

    /* Make sure we have an array ref with values */
    if ((!SvROK(terms))
        || (SvTYPE(SvRV(terms)) != SVt_PVAV)
        || ((numterms = av_len((AV *)SvRV(terms))) < 0))
    {
        return 0;
    }

    /* Set result to first value in array */
    result = SvNV(* av_fetch((AV *)SvRV(terms), 0, 0));

    for (i = 1; i <= numterms; i++) {
        result *= SvNV(* av_fetch((AV *)SvRV(terms), i, 0));
    }
    return result;
}

[download]

cheers

tachyon

In reply to Re: Using c executable in Perl Script by tachyon
in thread Using c executable in Perl Script by sgc

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