The typemap handles it. 

#!/usr/bin/perl

use Inline C => <<'EOC';

void show(int index) {
    PerlIO_printf(PerlIO_stdout(), "%d\n", index);
}

EOC

show(123456);

[download]
123456

[download]

In reply to Re^2: simple XS by ikegami
in thread simple XS by spx2

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