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415 lines
15 KiB
C
415 lines
15 KiB
C
/*-------------------------------------------------------------------------
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*
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* geo_decls.h - Declarations for various 2D constructs.
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*
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*
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* Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $PostgreSQL: pgsql/src/include/utils/geo_decls.h,v 1.43 2003/11/29 22:41:15 pgsql Exp $
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*
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* NOTE
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* These routines do *not* use the float types from adt/.
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*
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* XXX These routines were not written by a numerical analyst.
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*
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* XXX I have made some attempt to flesh out the operators
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* and data types. There are still some more to do. - tgl 97/04/19
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef GEO_DECLS_H
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#define GEO_DECLS_H
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#include "fmgr.h"
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/*--------------------------------------------------------------------
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* Useful floating point utilities and constants.
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*-------------------------------------------------------------------*/
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#define EPSILON 1.0E-06
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#ifdef EPSILON
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#define FPzero(A) (fabs(A) <= EPSILON)
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#define FPeq(A,B) (fabs((A) - (B)) <= EPSILON)
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#define FPne(A,B) (fabs((A) - (B)) > EPSILON)
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#define FPlt(A,B) ((B) - (A) > EPSILON)
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#define FPle(A,B) ((A) - (B) <= EPSILON)
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#define FPgt(A,B) ((A) - (B) > EPSILON)
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#define FPge(A,B) ((B) - (A) <= EPSILON)
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#else
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#define FPzero(A) ((A) == 0)
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#define FPeq(A,B) ((A) == (B))
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#define FPne(A,B) ((A) != (B))
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#define FPlt(A,B) ((A) < (B))
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#define FPle(A,B) ((A) <= (B))
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#define FPgt(A,B) ((A) > (B))
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#define FPge(A,B) ((A) >= (B))
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#endif
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#define HYPOT(A, B) sqrt((A) * (A) + (B) * (B))
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/*---------------------------------------------------------------------
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* Point - (x,y)
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*-------------------------------------------------------------------*/
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typedef struct
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{
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double x,
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y;
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} Point;
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/*---------------------------------------------------------------------
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* LSEG - A straight line, specified by endpoints.
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*-------------------------------------------------------------------*/
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typedef struct
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{
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Point p[2];
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double m; /* precomputed to save time, not in tuple */
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} LSEG;
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/*---------------------------------------------------------------------
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* PATH - Specified by vertex points.
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*-------------------------------------------------------------------*/
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typedef struct
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{
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int32 size; /* XXX varlena */
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int32 npts;
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int32 closed; /* is this a closed polygon? */
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int32 dummy; /* padding to make it double align */
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Point p[1]; /* variable length array of POINTs */
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} PATH;
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/*---------------------------------------------------------------------
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* LINE - Specified by its general equation (Ax+By+C=0).
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* If there is a y-intercept, it is C, which
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* incidentally gives a freebie point on the line
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* (if B=0, then C is the x-intercept).
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* Slope m is precalculated to save time; if
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* the line is not vertical, m == A.
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*-------------------------------------------------------------------*/
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typedef struct
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{
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double A,
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B,
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C;
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double m;
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} LINE;
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/*---------------------------------------------------------------------
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* BOX - Specified by two corner points, which are
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* sorted to save calculation time later.
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*-------------------------------------------------------------------*/
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typedef struct
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{
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Point high,
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low; /* corner POINTs */
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} BOX;
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/*---------------------------------------------------------------------
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* POLYGON - Specified by an array of doubles defining the points,
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* keeping the number of points and the bounding box for
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* speed purposes.
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*-------------------------------------------------------------------*/
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typedef struct
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{
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int32 size; /* XXX varlena */
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int32 npts;
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BOX boundbox;
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Point p[1]; /* variable length array of POINTs */
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} POLYGON;
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/*---------------------------------------------------------------------
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* CIRCLE - Specified by a center point and radius.
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*-------------------------------------------------------------------*/
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typedef struct
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{
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Point center;
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double radius;
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} CIRCLE;
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/*
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* fmgr interface macros
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*
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* Path and Polygon are toastable varlena types, the others are just
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* fixed-size pass-by-reference types.
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*/
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#define DatumGetPointP(X) ((Point *) DatumGetPointer(X))
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#define PointPGetDatum(X) PointerGetDatum(X)
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#define PG_GETARG_POINT_P(n) DatumGetPointP(PG_GETARG_DATUM(n))
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#define PG_RETURN_POINT_P(x) return PointPGetDatum(x)
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#define DatumGetLsegP(X) ((LSEG *) DatumGetPointer(X))
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#define LsegPGetDatum(X) PointerGetDatum(X)
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#define PG_GETARG_LSEG_P(n) DatumGetLsegP(PG_GETARG_DATUM(n))
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#define PG_RETURN_LSEG_P(x) return LsegPGetDatum(x)
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#define DatumGetPathP(X) ((PATH *) PG_DETOAST_DATUM(X))
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#define DatumGetPathPCopy(X) ((PATH *) PG_DETOAST_DATUM_COPY(X))
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#define PathPGetDatum(X) PointerGetDatum(X)
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#define PG_GETARG_PATH_P(n) DatumGetPathP(PG_GETARG_DATUM(n))
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#define PG_GETARG_PATH_P_COPY(n) DatumGetPathPCopy(PG_GETARG_DATUM(n))
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#define PG_RETURN_PATH_P(x) return PathPGetDatum(x)
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#define DatumGetLineP(X) ((LINE *) DatumGetPointer(X))
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#define LinePGetDatum(X) PointerGetDatum(X)
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#define PG_GETARG_LINE_P(n) DatumGetLineP(PG_GETARG_DATUM(n))
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#define PG_RETURN_LINE_P(x) return LinePGetDatum(x)
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#define DatumGetBoxP(X) ((BOX *) DatumGetPointer(X))
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#define BoxPGetDatum(X) PointerGetDatum(X)
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#define PG_GETARG_BOX_P(n) DatumGetBoxP(PG_GETARG_DATUM(n))
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#define PG_RETURN_BOX_P(x) return BoxPGetDatum(x)
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#define DatumGetPolygonP(X) ((POLYGON *) PG_DETOAST_DATUM(X))
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#define DatumGetPolygonPCopy(X) ((POLYGON *) PG_DETOAST_DATUM_COPY(X))
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#define PolygonPGetDatum(X) PointerGetDatum(X)
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#define PG_GETARG_POLYGON_P(n) DatumGetPolygonP(PG_GETARG_DATUM(n))
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#define PG_GETARG_POLYGON_P_COPY(n) DatumGetPolygonPCopy(PG_GETARG_DATUM(n))
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#define PG_RETURN_POLYGON_P(x) return PolygonPGetDatum(x)
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#define DatumGetCircleP(X) ((CIRCLE *) DatumGetPointer(X))
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#define CirclePGetDatum(X) PointerGetDatum(X)
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#define PG_GETARG_CIRCLE_P(n) DatumGetCircleP(PG_GETARG_DATUM(n))
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#define PG_RETURN_CIRCLE_P(x) return CirclePGetDatum(x)
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/*
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* in geo_ops.h
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*/
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/* public point routines */
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extern Datum point_in(PG_FUNCTION_ARGS);
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extern Datum point_out(PG_FUNCTION_ARGS);
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extern Datum point_recv(PG_FUNCTION_ARGS);
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extern Datum point_send(PG_FUNCTION_ARGS);
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extern Datum construct_point(PG_FUNCTION_ARGS);
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extern Datum point_left(PG_FUNCTION_ARGS);
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extern Datum point_right(PG_FUNCTION_ARGS);
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extern Datum point_above(PG_FUNCTION_ARGS);
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extern Datum point_below(PG_FUNCTION_ARGS);
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extern Datum point_vert(PG_FUNCTION_ARGS);
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extern Datum point_horiz(PG_FUNCTION_ARGS);
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extern Datum point_eq(PG_FUNCTION_ARGS);
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extern Datum point_ne(PG_FUNCTION_ARGS);
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extern Datum point_distance(PG_FUNCTION_ARGS);
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extern Datum point_slope(PG_FUNCTION_ARGS);
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extern Datum point_add(PG_FUNCTION_ARGS);
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extern Datum point_sub(PG_FUNCTION_ARGS);
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extern Datum point_mul(PG_FUNCTION_ARGS);
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extern Datum point_div(PG_FUNCTION_ARGS);
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/* private routines */
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extern double point_dt(Point *pt1, Point *pt2);
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extern double point_sl(Point *pt1, Point *pt2);
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/* public lseg routines */
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extern Datum lseg_in(PG_FUNCTION_ARGS);
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extern Datum lseg_out(PG_FUNCTION_ARGS);
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extern Datum lseg_recv(PG_FUNCTION_ARGS);
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extern Datum lseg_send(PG_FUNCTION_ARGS);
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extern Datum lseg_intersect(PG_FUNCTION_ARGS);
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extern Datum lseg_parallel(PG_FUNCTION_ARGS);
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extern Datum lseg_perp(PG_FUNCTION_ARGS);
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extern Datum lseg_vertical(PG_FUNCTION_ARGS);
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extern Datum lseg_horizontal(PG_FUNCTION_ARGS);
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extern Datum lseg_eq(PG_FUNCTION_ARGS);
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extern Datum lseg_ne(PG_FUNCTION_ARGS);
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extern Datum lseg_lt(PG_FUNCTION_ARGS);
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extern Datum lseg_le(PG_FUNCTION_ARGS);
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extern Datum lseg_gt(PG_FUNCTION_ARGS);
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extern Datum lseg_ge(PG_FUNCTION_ARGS);
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extern Datum lseg_construct(PG_FUNCTION_ARGS);
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extern Datum lseg_length(PG_FUNCTION_ARGS);
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extern Datum lseg_distance(PG_FUNCTION_ARGS);
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extern Datum lseg_center(PG_FUNCTION_ARGS);
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extern Datum lseg_interpt(PG_FUNCTION_ARGS);
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extern Datum dist_pl(PG_FUNCTION_ARGS);
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extern Datum dist_ps(PG_FUNCTION_ARGS);
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extern Datum dist_ppath(PG_FUNCTION_ARGS);
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extern Datum dist_pb(PG_FUNCTION_ARGS);
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extern Datum dist_sl(PG_FUNCTION_ARGS);
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extern Datum dist_sb(PG_FUNCTION_ARGS);
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extern Datum dist_lb(PG_FUNCTION_ARGS);
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extern Datum close_lseg(PG_FUNCTION_ARGS);
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extern Datum close_pl(PG_FUNCTION_ARGS);
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extern Datum close_ps(PG_FUNCTION_ARGS);
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extern Datum close_pb(PG_FUNCTION_ARGS);
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extern Datum close_sl(PG_FUNCTION_ARGS);
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extern Datum close_sb(PG_FUNCTION_ARGS);
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extern Datum close_ls(PG_FUNCTION_ARGS);
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extern Datum close_lb(PG_FUNCTION_ARGS);
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extern Datum on_pl(PG_FUNCTION_ARGS);
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extern Datum on_ps(PG_FUNCTION_ARGS);
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extern Datum on_pb(PG_FUNCTION_ARGS);
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extern Datum on_ppath(PG_FUNCTION_ARGS);
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extern Datum on_sl(PG_FUNCTION_ARGS);
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extern Datum on_sb(PG_FUNCTION_ARGS);
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extern Datum inter_sl(PG_FUNCTION_ARGS);
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extern Datum inter_sb(PG_FUNCTION_ARGS);
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extern Datum inter_lb(PG_FUNCTION_ARGS);
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/* public line routines */
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extern Datum line_in(PG_FUNCTION_ARGS);
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extern Datum line_out(PG_FUNCTION_ARGS);
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extern Datum line_recv(PG_FUNCTION_ARGS);
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extern Datum line_send(PG_FUNCTION_ARGS);
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extern Datum line_interpt(PG_FUNCTION_ARGS);
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extern Datum line_distance(PG_FUNCTION_ARGS);
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extern Datum line_construct_pp(PG_FUNCTION_ARGS);
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extern Datum line_intersect(PG_FUNCTION_ARGS);
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extern Datum line_parallel(PG_FUNCTION_ARGS);
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extern Datum line_perp(PG_FUNCTION_ARGS);
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extern Datum line_vertical(PG_FUNCTION_ARGS);
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extern Datum line_horizontal(PG_FUNCTION_ARGS);
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extern Datum line_eq(PG_FUNCTION_ARGS);
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/* public box routines */
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extern Datum box_in(PG_FUNCTION_ARGS);
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extern Datum box_out(PG_FUNCTION_ARGS);
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extern Datum box_recv(PG_FUNCTION_ARGS);
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extern Datum box_send(PG_FUNCTION_ARGS);
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extern Datum box_same(PG_FUNCTION_ARGS);
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extern Datum box_overlap(PG_FUNCTION_ARGS);
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extern Datum box_overleft(PG_FUNCTION_ARGS);
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extern Datum box_left(PG_FUNCTION_ARGS);
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extern Datum box_right(PG_FUNCTION_ARGS);
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extern Datum box_overright(PG_FUNCTION_ARGS);
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extern Datum box_contained(PG_FUNCTION_ARGS);
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extern Datum box_contain(PG_FUNCTION_ARGS);
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extern Datum box_below(PG_FUNCTION_ARGS);
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extern Datum box_above(PG_FUNCTION_ARGS);
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extern Datum box_lt(PG_FUNCTION_ARGS);
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extern Datum box_gt(PG_FUNCTION_ARGS);
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extern Datum box_eq(PG_FUNCTION_ARGS);
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extern Datum box_le(PG_FUNCTION_ARGS);
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extern Datum box_ge(PG_FUNCTION_ARGS);
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extern Datum box_area(PG_FUNCTION_ARGS);
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extern Datum box_width(PG_FUNCTION_ARGS);
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extern Datum box_height(PG_FUNCTION_ARGS);
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extern Datum box_distance(PG_FUNCTION_ARGS);
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extern Datum box_center(PG_FUNCTION_ARGS);
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extern Datum box_intersect(PG_FUNCTION_ARGS);
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extern Datum box_diagonal(PG_FUNCTION_ARGS);
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extern Datum points_box(PG_FUNCTION_ARGS);
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extern Datum box_add(PG_FUNCTION_ARGS);
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extern Datum box_sub(PG_FUNCTION_ARGS);
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extern Datum box_mul(PG_FUNCTION_ARGS);
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extern Datum box_div(PG_FUNCTION_ARGS);
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/* public path routines */
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extern Datum path_in(PG_FUNCTION_ARGS);
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extern Datum path_out(PG_FUNCTION_ARGS);
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extern Datum path_recv(PG_FUNCTION_ARGS);
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extern Datum path_send(PG_FUNCTION_ARGS);
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extern Datum path_n_lt(PG_FUNCTION_ARGS);
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extern Datum path_n_gt(PG_FUNCTION_ARGS);
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extern Datum path_n_eq(PG_FUNCTION_ARGS);
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extern Datum path_n_le(PG_FUNCTION_ARGS);
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extern Datum path_n_ge(PG_FUNCTION_ARGS);
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extern Datum path_inter(PG_FUNCTION_ARGS);
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extern Datum path_distance(PG_FUNCTION_ARGS);
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extern Datum path_length(PG_FUNCTION_ARGS);
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extern Datum path_isclosed(PG_FUNCTION_ARGS);
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extern Datum path_isopen(PG_FUNCTION_ARGS);
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extern Datum path_npoints(PG_FUNCTION_ARGS);
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extern Datum path_close(PG_FUNCTION_ARGS);
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extern Datum path_open(PG_FUNCTION_ARGS);
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extern Datum path_add(PG_FUNCTION_ARGS);
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extern Datum path_add_pt(PG_FUNCTION_ARGS);
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extern Datum path_sub_pt(PG_FUNCTION_ARGS);
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extern Datum path_mul_pt(PG_FUNCTION_ARGS);
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extern Datum path_div_pt(PG_FUNCTION_ARGS);
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extern Datum path_center(PG_FUNCTION_ARGS);
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extern Datum path_poly(PG_FUNCTION_ARGS);
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/* public polygon routines */
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extern Datum poly_in(PG_FUNCTION_ARGS);
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extern Datum poly_out(PG_FUNCTION_ARGS);
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extern Datum poly_recv(PG_FUNCTION_ARGS);
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extern Datum poly_send(PG_FUNCTION_ARGS);
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extern Datum poly_left(PG_FUNCTION_ARGS);
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extern Datum poly_overleft(PG_FUNCTION_ARGS);
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extern Datum poly_right(PG_FUNCTION_ARGS);
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extern Datum poly_overright(PG_FUNCTION_ARGS);
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extern Datum poly_same(PG_FUNCTION_ARGS);
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extern Datum poly_overlap(PG_FUNCTION_ARGS);
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extern Datum poly_contain(PG_FUNCTION_ARGS);
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extern Datum poly_contained(PG_FUNCTION_ARGS);
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extern Datum poly_contain_pt(PG_FUNCTION_ARGS);
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extern Datum pt_contained_poly(PG_FUNCTION_ARGS);
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extern Datum poly_distance(PG_FUNCTION_ARGS);
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extern Datum poly_npoints(PG_FUNCTION_ARGS);
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extern Datum poly_center(PG_FUNCTION_ARGS);
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extern Datum poly_box(PG_FUNCTION_ARGS);
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extern Datum poly_path(PG_FUNCTION_ARGS);
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extern Datum box_poly(PG_FUNCTION_ARGS);
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/* public circle routines */
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extern Datum circle_in(PG_FUNCTION_ARGS);
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extern Datum circle_out(PG_FUNCTION_ARGS);
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extern Datum circle_recv(PG_FUNCTION_ARGS);
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extern Datum circle_send(PG_FUNCTION_ARGS);
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extern Datum circle_same(PG_FUNCTION_ARGS);
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extern Datum circle_overlap(PG_FUNCTION_ARGS);
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extern Datum circle_overleft(PG_FUNCTION_ARGS);
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extern Datum circle_left(PG_FUNCTION_ARGS);
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extern Datum circle_right(PG_FUNCTION_ARGS);
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extern Datum circle_overright(PG_FUNCTION_ARGS);
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extern Datum circle_contained(PG_FUNCTION_ARGS);
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extern Datum circle_contain(PG_FUNCTION_ARGS);
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extern Datum circle_below(PG_FUNCTION_ARGS);
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extern Datum circle_above(PG_FUNCTION_ARGS);
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extern Datum circle_eq(PG_FUNCTION_ARGS);
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extern Datum circle_ne(PG_FUNCTION_ARGS);
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extern Datum circle_lt(PG_FUNCTION_ARGS);
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extern Datum circle_gt(PG_FUNCTION_ARGS);
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extern Datum circle_le(PG_FUNCTION_ARGS);
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extern Datum circle_ge(PG_FUNCTION_ARGS);
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extern Datum circle_contain_pt(PG_FUNCTION_ARGS);
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extern Datum pt_contained_circle(PG_FUNCTION_ARGS);
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extern Datum circle_add_pt(PG_FUNCTION_ARGS);
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extern Datum circle_sub_pt(PG_FUNCTION_ARGS);
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extern Datum circle_mul_pt(PG_FUNCTION_ARGS);
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extern Datum circle_div_pt(PG_FUNCTION_ARGS);
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extern Datum circle_diameter(PG_FUNCTION_ARGS);
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extern Datum circle_radius(PG_FUNCTION_ARGS);
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extern Datum circle_distance(PG_FUNCTION_ARGS);
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extern Datum dist_pc(PG_FUNCTION_ARGS);
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extern Datum dist_cpoly(PG_FUNCTION_ARGS);
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extern Datum circle_center(PG_FUNCTION_ARGS);
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extern Datum cr_circle(PG_FUNCTION_ARGS);
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extern Datum box_circle(PG_FUNCTION_ARGS);
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extern Datum circle_box(PG_FUNCTION_ARGS);
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extern Datum poly_circle(PG_FUNCTION_ARGS);
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extern Datum circle_poly(PG_FUNCTION_ARGS);
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extern Datum circle_area(PG_FUNCTION_ARGS);
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/* support routines for the rtree access method (rtproc.c) */
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extern Datum rt_box_union(PG_FUNCTION_ARGS);
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extern Datum rt_box_inter(PG_FUNCTION_ARGS);
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extern Datum rt_box_size(PG_FUNCTION_ARGS);
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extern Datum rt_poly_size(PG_FUNCTION_ARGS);
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extern Datum rt_poly_union(PG_FUNCTION_ARGS);
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extern Datum rt_poly_inter(PG_FUNCTION_ARGS);
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/* geo_selfuncs.c */
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extern Datum areasel(PG_FUNCTION_ARGS);
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extern Datum areajoinsel(PG_FUNCTION_ARGS);
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extern Datum positionsel(PG_FUNCTION_ARGS);
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extern Datum positionjoinsel(PG_FUNCTION_ARGS);
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extern Datum contsel(PG_FUNCTION_ARGS);
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extern Datum contjoinsel(PG_FUNCTION_ARGS);
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#endif /* GEO_DECLS_H */
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