Thanks tye, that's great!

I was trying similar things, but did not realize pack was required. This is far easier and less error-prone as you said (as well it saves me from having to wrap one C function with another as this way, I can pass the data directly to the original function), but I am thankful that I was able to learn how to pass in perl variables into a C function, even though I'm going to revert to using this method instead:


use warnings;
use strict;
use feature 'say';

use Inline 'C';

my @b = (1..3, 253..255);
my $x = pack "V0C*", @b;

check($x, length($x));

__END__
__C__

#include <stdio.h>
#include <stdint.h>

void check(unsigned char* n, int len){

    int i;
    
    for(i=0; i<len; i++){
       printf("%d\n", n[i]);
    }
}

[download]

Output:

1
2
3
253
254
255

[download]

Of course, in the real code, I perform error checking.

In reply to Re^2: Is this a sane/safe way to pass an aref into a C function? (XS<Perl) by stevieb
in thread Is this a sane/safe way to pass an aref into a C function? by stevieb

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