PostGIS  2.5.0dev-r@@SVN_REVISION@@
Datum LWGEOM_maxdistance2d_linestring ( PG_FUNCTION_ARGS  )

Definition at line 794 of file lwgeom_functions_basic.c.

References error_if_srid_mismatch(), lwgeom_from_gserialized(), lwgeom_maxdistance2d(), and LWGEOM::srid.

795 {
796  double maxdist;
797  GSERIALIZED *geom1 = PG_GETARG_GSERIALIZED_P(0);
798  GSERIALIZED *geom2 = PG_GETARG_GSERIALIZED_P(1);
799  LWGEOM *lwgeom1 = lwgeom_from_gserialized(geom1);
800  LWGEOM *lwgeom2 = lwgeom_from_gserialized(geom2);
801 
802  error_if_srid_mismatch(lwgeom1->srid, lwgeom2->srid);
803 
804  maxdist = lwgeom_maxdistance2d(lwgeom1, lwgeom2);
805 
806  PG_FREE_IF_COPY(geom1, 0);
807  PG_FREE_IF_COPY(geom2, 1);
808 
809  /*if called with empty geometries the ingoing mindistance is untouched, and makes us return NULL*/
810  if (maxdist>-1)
811  PG_RETURN_FLOAT8(maxdist);
812 
813  PG_RETURN_NULL();
814 }
LWGEOM * lwgeom_from_gserialized(const GSERIALIZED *g)
Allocate a new LWGEOM from a GSERIALIZED.
void error_if_srid_mismatch(int srid1, int srid2)
Definition: lwutil.c:338
int32_t srid
Definition: liblwgeom.h:398
double lwgeom_maxdistance2d(const LWGEOM *lw1, const LWGEOM *lw2)
Function initialazing max distance calculation.
Definition: measures.c:169

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