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382092a0cd
Fix for 1f0de66ea2: We need to prevent redeclaration of typedef
yyscan_t. (This will work with C11 but not currently with C99.) The
generated scanner files provide their own typedef, but we also need to
provide one for the interfaces that we expose. So we need to add some
preprocessor guards to avoid a redefinition. (This is how the
generated scanner files do it internally as well.) This way
everything now works independent of the order in which things are
included.
Discussion: https://www.postgresql.org/message-id/flat/eb6faeac-2a8a-4b69-9189-c33c520e5b7b@eisentraut.org
83 lines
2.6 KiB
C
83 lines
2.6 KiB
C
/* contrib/cube/cubedata.h */
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/*
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* This limit is pretty arbitrary, but don't make it so large that you
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* risk overflow in sizing calculations.
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*/
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#define CUBE_MAX_DIM (100)
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typedef struct NDBOX
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{
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/* varlena header (do not touch directly!) */
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int32 vl_len_;
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/*----------
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* Header contains info about NDBOX. For binary compatibility with old
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* versions, it is defined as "unsigned int".
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*
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* Following information is stored:
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*
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* bits 0-7 : number of cube dimensions;
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* bits 8-30 : unused, initialize to zero;
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* bit 31 : point flag. If set, the upper right coordinates are not
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* stored, and are implicitly the same as the lower left
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* coordinates.
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*----------
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*/
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unsigned int header;
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/*
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* The lower left coordinates for each dimension come first, followed by
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* upper right coordinates unless the point flag is set.
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*/
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double x[FLEXIBLE_ARRAY_MEMBER];
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} NDBOX;
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/* NDBOX access macros */
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#define POINT_BIT 0x80000000
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#define DIM_MASK 0x7fffffff
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#define IS_POINT(cube) ( ((cube)->header & POINT_BIT) != 0 )
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#define SET_POINT_BIT(cube) ( (cube)->header |= POINT_BIT )
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#define DIM(cube) ( (cube)->header & DIM_MASK )
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#define SET_DIM(cube, _dim) ( (cube)->header = ((cube)->header & ~DIM_MASK) | (_dim) )
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#define LL_COORD(cube, i) ( (cube)->x[i] )
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#define UR_COORD(cube, i) ( IS_POINT(cube) ? (cube)->x[i] : (cube)->x[(i) + DIM(cube)] )
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#define POINT_SIZE(_dim) (offsetof(NDBOX, x) + sizeof(double)*(_dim))
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#define CUBE_SIZE(_dim) (offsetof(NDBOX, x) + sizeof(double)*(_dim)*2)
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/* fmgr interface macros */
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#define DatumGetNDBOXP(x) ((NDBOX *) PG_DETOAST_DATUM(x))
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#define PG_GETARG_NDBOX_P(x) DatumGetNDBOXP(PG_GETARG_DATUM(x))
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#define PG_RETURN_NDBOX_P(x) PG_RETURN_POINTER(x)
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/* GiST operator strategy numbers */
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#define CubeKNNDistanceCoord 15 /* ~> */
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#define CubeKNNDistanceTaxicab 16 /* <#> */
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#define CubeKNNDistanceEuclid 17 /* <-> */
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#define CubeKNNDistanceChebyshev 18 /* <=> */
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/* for cubescan.l and cubeparse.y */
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/* All grammar constructs return strings */
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#define YYSTYPE char *
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#ifndef YY_TYPEDEF_YY_SCANNER_T
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#define YY_TYPEDEF_YY_SCANNER_T
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typedef void *yyscan_t;
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#endif
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/* in cubescan.l */
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extern int cube_yylex(YYSTYPE *yylval_param, yyscan_t yyscanner);
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extern void cube_yyerror(NDBOX **result, Size scanbuflen,
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struct Node *escontext,
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yyscan_t yyscanner,
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const char *message);
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extern void cube_scanner_init(const char *str, Size *scanbuflen, yyscan_t *yyscannerp);
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extern void cube_scanner_finish(yyscan_t yyscanner);
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/* in cubeparse.y */
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extern int cube_yyparse(NDBOX **result, Size scanbuflen,
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struct Node *escontext,
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yyscan_t yyscanner);
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