The number is the address[1] of the SV[2], so it's just a question of casting the number into a pointer. To work with it from Perl, you'd need a reference (since it's not necessarily a scalar), so you'd pass the pointer to newRV_inc. 
use Test::More tests => 2;

use Inline C => <<'__EOC__';

   SV* addr_to_ref(IV addr) {
      return newRV_inc((SV*)addr);
   }

__EOC__

{
   my @a = qw( a b c );
   my $ref = \@a;
   my $stringified_ref = "$ref";
   my $addr = $stringified_ref =~ /0x([0-9a-f]+)/ ? hex($1) : die;
   my $ref2 = addr_to_ref($addr);

   is(0+$ref, 0+$ref2);
   is("@$ref", "@$ref2");
}

[download]

That's assuming the SV is still allocated, of course.

  1. Numerical representation of a pointer.
  2. Or AV, HV, etc. For the purposes of this post, I consider these to be subtypes of SV.

In reply to Re: Printing an object when you only have the refaddr string for it by ikegami
in thread [SOLVED] Printing an object when you only have the refaddr string for it by delias_

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