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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 12:19:15 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 12:19:15 +0000 |
commit | 6eb9c5a5657d1fe77b55cc261450f3538d35a94d (patch) | |
tree | 657d8194422a5daccecfd42d654b8a245ef7b4c8 /contrib/cube/cubedata.h | |
parent | Initial commit. (diff) | |
download | postgresql-13-6eb9c5a5657d1fe77b55cc261450f3538d35a94d.tar.xz postgresql-13-6eb9c5a5657d1fe77b55cc261450f3538d35a94d.zip |
Adding upstream version 13.4.upstream/13.4upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'contrib/cube/cubedata.h')
-rw-r--r-- | contrib/cube/cubedata.h | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/contrib/cube/cubedata.h b/contrib/cube/cubedata.h new file mode 100644 index 0000000..dbe7d4f --- /dev/null +++ b/contrib/cube/cubedata.h @@ -0,0 +1,69 @@ +/* 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); |