/* must follow StdRdOptions conventions */
typedef struct BtOptions
{
	int32	vl_len_;
	int		fillfactor;
	char	teststring[1];
} BtOptions;


Datum
btoptions(PG_FUNCTION_ARGS)
{
	Datum		reloptions = PG_GETARG_DATUM(0);
	bool		validate = PG_GETARG_BOOL(1);
	bytea	   *result;
	relopt_value *options;
	int			numoptions;
	int			i;
	static	bool initialized = false;

	if (!initialized)
	{
		add_string_reloption(RELOPT_KIND_BTREE, "teststring", NULL,
							 "helluva string here and there!");
		initialized = true;
	}

	options = parseRelOptions(reloptions, validate, RELOPT_KIND_BTREE, &numoptions);

	/* if none set, we're done */
	if (numoptions == 0)
		result = NULL;
	else
	{
		BtOptions *rdopts;
		int		tstrlen;

		for (i = 0; i < numoptions; i++)
		{
			if (HAVE_RELOPTION("teststring", options[i]))
			{
				tstrlen = options[i].isset ?
					strlen(options[i].values.string_val) :
					((relopt_string *) options[i].gen)->default_len;
				break;
			}
		}

		rdopts = palloc0(sizeof(BtOptions) + tstrlen + 1);

		for (i = 0; i < numoptions; i++)
		{
			HANDLE_INT_RELOPTION("fillfactor", rdopts->fillfactor, options[i]);
			HANDLE_STRING_RELOPTION("teststring", rdopts->teststring, options[i]);
		}

		pfree(options);
		SET_VARSIZE(rdopts, sizeof(BtOptions) + tstrlen + 1);
		result = (bytea *) rdopts;
	}

	if (result)
		PG_RETURN_BYTEA_P(result);
	PG_RETURN_NULL();
}