diff options
Diffstat (limited to 'contrib/cube/cubedata.h')
| -rw-r--r-- | contrib/cube/cubedata.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/contrib/cube/cubedata.h b/contrib/cube/cubedata.h index 7eaac39640..af02464178 100644 --- a/contrib/cube/cubedata.h +++ b/contrib/cube/cubedata.h @@ -1,5 +1,9 @@ /* 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 @@ -29,6 +33,7 @@ typedef struct NDBOX double x[FLEXIBLE_ARRAY_MEMBER]; } NDBOX; +/* NDBOX access macros */ #define POINT_BIT 0x80000000 #define DIM_MASK 0x7fffffff @@ -43,10 +48,12 @@ typedef struct NDBOX #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 DatumGetNDBOX(x) ((NDBOX *) PG_DETOAST_DATUM(x)) #define PG_GETARG_NDBOX(x) DatumGetNDBOX(PG_GETARG_DATUM(x)) #define PG_RETURN_NDBOX(x) PG_RETURN_POINTER(x) +/* GiST operator strategy numbers */ #define CubeKNNDistanceCoord 15 /* ~> */ #define CubeKNNDistanceTaxicab 16 /* <#> */ #define CubeKNNDistanceEuclid 17 /* <-> */ |