Function cube_a_f8

contrib/cube/cube.c:204–239

** Allows the construction of a zero-volume cube from a float[] */

** Allows the construction of a zero-volume cube from a float[]
*/
Datum
cube_a_f8(PG_FUNCTION_ARGS)
{
	ArrayType  *ur = PG_GETARG_ARRAYTYPE_P(0);
	NDBOX	   *result;
	int			i;
	int			dim;
	int			size;
	double	   *dur;

	if (array_contains_nulls(ur))
		ereport(ERROR,
				(errcode(ERRCODE_ARRAY_ELEMENT_ERROR),
				 errmsg("cannot work with arrays containing NULLs")));

	dim = ARRNELEMS(ur);
	if (dim > CUBE_MAX_DIM)
		ereport(ERROR,
				(errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
				 errmsg("array is too long"),
				 errdetail("A cube cannot have more than %d dimensions.",
						   CUBE_MAX_DIM)));

	dur = ARRPTR(ur);

	size = POINT_SIZE(dim);
	result = (NDBOX *) palloc0(size);
	SET_VARSIZE(result, size);
	SET_DIM(result, dim);
	SET_POINT_BIT(result);

	for (i = 0; i < dim; i++)
		result->x[i] = dur[i];

	PG_RETURN_NDBOX_P(result);
}

Datum
cube_subset(PG_FUNCTION_ARGS)