PostGIS  2.5.0dev-r@@SVN_REVISION@@
Datum LWGEOM_dwithin ( PG_FUNCTION_ARGS  )

Definition at line 729 of file lwgeom_functions_basic.c.

References error_if_srid_mismatch(), lwgeom_from_gserialized(), lwgeom_mindistance2d_tolerance(), and LWGEOM::srid.

730 {
731  double mindist;
732  GSERIALIZED *geom1 = PG_GETARG_GSERIALIZED_P(0);
733  GSERIALIZED *geom2 = PG_GETARG_GSERIALIZED_P(1);
734  double tolerance = PG_GETARG_FLOAT8(2);
735  LWGEOM *lwgeom1 = lwgeom_from_gserialized(geom1);
736  LWGEOM *lwgeom2 = lwgeom_from_gserialized(geom2);
737 
738  if ( tolerance < 0 )
739  {
740  elog(ERROR,"Tolerance cannot be less than zero\n");
741  PG_RETURN_NULL();
742  }
743 
744  error_if_srid_mismatch(lwgeom1->srid, lwgeom2->srid);
745 
746  mindist = lwgeom_mindistance2d_tolerance(lwgeom1,lwgeom2,tolerance);
747 
748  PG_FREE_IF_COPY(geom1, 0);
749  PG_FREE_IF_COPY(geom2, 1);
750  /*empty geometries cases should be right handled since return from underlying
751  functions should be FLT_MAX which causes false as answer*/
752  PG_RETURN_BOOL(tolerance >= mindist);
753 }
LWGEOM * lwgeom_from_gserialized(const GSERIALIZED *g)
Allocate a new LWGEOM from a GSERIALIZED.
double lwgeom_mindistance2d_tolerance(const LWGEOM *lw1, const LWGEOM *lw2, double tolerance)
Function handling min distance calculations and dwithin calculations.
Definition: measures.c:213
void error_if_srid_mismatch(int srid1, int srid2)
Definition: lwutil.c:338
int32_t srid
Definition: liblwgeom.h:398

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