Function lo_tell64

src/interfaces/libpq/fe-lobj.c:554–589

* lo_tell64 * returns the current seek location of the large object */

 *	  returns the current seek location of the large object
 */
pg_int64
lo_tell64(PGconn *conn, int fd)
{
	pg_int64	retval;
	PQArgBlock	argv[1];
	PGresult   *res;
	int			result_len;

	if (lo_initialize(conn) < 0)
		return -1;

	if (conn->lobjfuncs->fn_lo_tell64 == 0)
	{
		appendPQExpBuffer(&conn->errorMessage,
						  libpq_gettext("cannot determine OID of function %s\n"),
						  "lo_tell64");
		return -1;
	}

	argv[0].isint = 1;
	argv[0].len = 4;
	argv[0].u.integer = fd;

	res = PQfn(conn, conn->lobjfuncs->fn_lo_tell64,
			   (void *) &retval, &result_len, 0, argv, 1);
	if (PQresultStatus(res) == PGRES_COMMAND_OK && result_len == 8)
	{
		PQclear(res);
		return lo_ntoh64(retval);
	}
	else
	{
		PQclear(res);
		return -1;
	}
}

/*
 * lo_unlink