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-rw-r--r--contrib/cube/cubedata.h69
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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);