TYPEMAP
const char *        T_PV
xmlDocPtr           PROXY_OBJECT
xsltStylesheetPtr   O_OBJECT
ProxyObject *       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;
    }

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

OUTPUT

# The Perl object is blessed into 'CLASS', which should be a
# char* having the name of the package for the blessing.
O_OBJECT
        sv_setref_pv( $arg, (char *)CLASS, (void*)$var );

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