PostGIS  2.2.7dev-r@@SVN_REVISION@@
Datum LWGEOM_maxdistance2d_linestring ( PG_FUNCTION_ARGS  )

Definition at line 778 of file lwgeom_functions_basic.c.

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

779 {
780  double maxdist;
781  GSERIALIZED *geom1 = PG_GETARG_GSERIALIZED_P(0);
782  GSERIALIZED *geom2 = PG_GETARG_GSERIALIZED_P(1);
783  LWGEOM *lwgeom1 = lwgeom_from_gserialized(geom1);
784  LWGEOM *lwgeom2 = lwgeom_from_gserialized(geom2);
785 
786  error_if_srid_mismatch(lwgeom1->srid, lwgeom2->srid);
787 
788  maxdist = lwgeom_maxdistance2d(lwgeom1, lwgeom2);
789 
790  PG_FREE_IF_COPY(geom1, 0);
791  PG_FREE_IF_COPY(geom2, 1);
792 
793  /*if called with empty geometries the ingoing mindistance is untouched, and makes us return NULL*/
794  if (maxdist>-1)
795  PG_RETURN_FLOAT8(maxdist);
796 
797  PG_RETURN_NULL();
798 }
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:341
int32_t srid
Definition: liblwgeom.h:383
double lwgeom_maxdistance2d(const LWGEOM *lw1, const LWGEOM *lw2)
Function initialazing max distance calculation.
Definition: measures.c:155

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