PPMD_Encoder_Perl * T_OBJECT
PPMD_Decoder_Perl * T_OBJECT

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

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