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- /* contrib/cube/cubedata.h */
-
- /*
- * This limit is pretty arbitrary, but don't make it so large that you
- * risk overflow in sizing calculations.
- */
- #define CUBE_MAX_DIM (100)
-
- typedef struct NDBOX
- {
- /* varlena header (do not touch directly!) */
- int32 vl_len_;
-
- /*----------
- * Header contains info about NDBOX. For binary compatibility with old
- * versions, it is defined as "unsigned int".
- *
- * Following information is stored:
- *
- * bits 0-7 : number of cube dimensions;
- * bits 8-30 : unused, initialize to zero;
- * bit 31 : point flag. If set, the upper right coordinates are not
- * stored, and are implicitly the same as the lower left
- * coordinates.
- *----------
- */
- unsigned int header;
-
- /*
- * The lower left coordinates for each dimension come first, followed by
- * upper right coordinates unless the point flag is set.
- */
- double x[FLEXIBLE_ARRAY_MEMBER];
- } NDBOX;
-
- /* NDBOX access macros */
- #define POINT_BIT 0x80000000
- #define DIM_MASK 0x7fffffff
-
- #define IS_POINT(cube) ( ((cube)->header & POINT_BIT) != 0 )
- #define SET_POINT_BIT(cube) ( (cube)->header |= POINT_BIT )
- #define DIM(cube) ( (cube)->header & DIM_MASK )
- #define SET_DIM(cube, _dim) ( (cube)->header = ((cube)->header & ~DIM_MASK) | (_dim) )
-
- #define LL_COORD(cube, i) ( (cube)->x[i] )
- #define UR_COORD(cube, i) ( IS_POINT(cube) ? (cube)->x[i] : (cube)->x[(i) + DIM(cube)] )
-
- #define POINT_SIZE(_dim) (offsetof(NDBOX, x) + sizeof(double)*(_dim))
- #define CUBE_SIZE(_dim) (offsetof(NDBOX, x) + sizeof(double)*(_dim)*2)
-
- /* fmgr interface macros */
- #define DatumGetNDBOXP(x) ((NDBOX *) PG_DETOAST_DATUM(x))
- #define PG_GETARG_NDBOX_P(x) DatumGetNDBOXP(PG_GETARG_DATUM(x))
- #define PG_RETURN_NDBOX_P(x) PG_RETURN_POINTER(x)
-
- /* GiST operator strategy numbers */
- #define CubeKNNDistanceCoord 15 /* ~> */
- #define CubeKNNDistanceTaxicab 16 /* <#> */
- #define CubeKNNDistanceEuclid 17 /* <-> */
- #define CubeKNNDistanceChebyshev 18 /* <=> */
-
- /* in cubescan.l */
- extern int cube_yylex(void);
- extern void cube_yyerror(NDBOX **result, const char *message) pg_attribute_noreturn();
- extern void cube_scanner_init(const char *str);
- extern void cube_scanner_finish(void);
-
- /* in cubeparse.y */
- extern int cube_yyparse(NDBOX **result);
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