TYPEMAP
Graphics_SANE_Handle	T_PTROBJ_HANDLE

INPUT
T_PTROBJ_HANDLE
    if (sv_derived_from($arg, \"${(my $ntt=$ntype)=~s/_/::/g;\$ntt}\")) {
	 IV tmp = SvIV((SV*)SvRV($arg));
	 $var = INT2PTR($type, tmp);
    }
    else
         croak(\"$var is not of type ${(my $ntt=$ntype)=~s/_/::/g;\$ntt}\")

OUTPUT
T_PTROBJ_HANDLE
    if ($arg == NULL)
	$var = &PL_sv_undef;
    else
        sv_setref_pv($arg, \"${(my $ntt=$ntype)=~s/_/::/g;\$ntt}\", (void*)$var);

