TYPEMAP
Header                  O_OBJECT
rpmSpec                 O_OBJECT
rpmts                   O_OBJECT
rpmds                   O_OBJECT
rpmfi                   O_OBJECT
rpmte                   O_OBJECT
rpmps                   O_OBJECT

INPUT
O_OBJECT
    if (sv_isobject($arg) && (SvTYPE(SvRV($arg)) == SVt_PVMG))
        $var = ($type)SvIV((SV*)SvRV( $arg ));
    else {
        warn( \"${Package}::$func_name() -- $var is not a blessed SV reference\" );
        XSRETURN_UNDEF;
    }

OUTPUT
O_OBJECT
        sv_setref_pv( $arg, (char *)CLASS, (void*)$var );