diff options
Diffstat (limited to 'contrib/cube/cubedata.h')
| -rw-r--r-- | contrib/cube/cubedata.h | 39 |
1 files changed, 37 insertions, 2 deletions
diff --git a/contrib/cube/cubedata.h b/contrib/cube/cubedata.h index fd0c26a3816..6c825b98ea7 100644 --- a/contrib/cube/cubedata.h +++ b/contrib/cube/cubedata.h @@ -4,11 +4,46 @@ typedef struct NDBOX { - int32 vl_len_; /* varlena header (do not touch directly!) */ - unsigned int dim; + /* 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; + + /* + * Variable length array. The lower left coordinates for each dimension + * come first, followed by upper right coordinates unless the point flag + * is set. + */ double x[1]; } NDBOX; +#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[0]) + sizeof(double)*(_dim)) +#define CUBE_SIZE(_dim) (offsetof(NDBOX, x[0]) + sizeof(double)*(_dim)*2) + #define DatumGetNDBOX(x) ((NDBOX*)DatumGetPointer(x)) #define PG_GETARG_NDBOX(x) DatumGetNDBOX( PG_DETOAST_DATUM(PG_GETARG_DATUM(x)) ) #define PG_RETURN_NDBOX(x) PG_RETURN_POINTER(x) |