PostGIS  2.3.7dev-r@@SVN_REVISION@@
Datum LWGEOM_longestline2d ( PG_FUNCTION_ARGS  )

Definition at line 668 of file lwgeom_functions_basic.c.

References error_if_srid_mismatch(), geometry_serialize(), lwgeom_free(), lwgeom_from_gserialized(), lwgeom_furthest_line(), lwgeom_is_empty(), and LWGEOM::srid.

669 {
670  GSERIALIZED *result;
671  GSERIALIZED *geom1 = PG_GETARG_GSERIALIZED_P(0);
672  GSERIALIZED *geom2 = PG_GETARG_GSERIALIZED_P(1);
673  LWGEOM *theline;
674  LWGEOM *lwgeom1 = lwgeom_from_gserialized(geom1);
675  LWGEOM *lwgeom2 = lwgeom_from_gserialized(geom2);
676 
677  error_if_srid_mismatch(lwgeom1->srid, lwgeom2->srid);
678 
679  theline = lwgeom_furthest_line(lwgeom1, lwgeom2);
680 
681  if (lwgeom_is_empty(theline))
682  PG_RETURN_NULL();
683 
684  result = geometry_serialize(theline);
685  lwgeom_free(theline);
686  lwgeom_free(lwgeom1);
687  lwgeom_free(lwgeom2);
688 
689  PG_FREE_IF_COPY(geom1, 0);
690  PG_FREE_IF_COPY(geom2, 1);
691  PG_RETURN_POINTER(result);
692 }
LWGEOM * lwgeom_from_gserialized(const GSERIALIZED *g)
Allocate a new LWGEOM from a GSERIALIZED.
void lwgeom_free(LWGEOM *geom)
Definition: lwgeom.c:1063
void error_if_srid_mismatch(int srid1, int srid2)
Definition: lwutil.c:369
int32_t srid
Definition: liblwgeom.h:398
LWGEOM * lwgeom_furthest_line(const LWGEOM *lw1, const LWGEOM *lw2)
Definition: measures.c:48
GSERIALIZED * geometry_serialize(LWGEOM *lwgeom)
int lwgeom_is_empty(const LWGEOM *geom)
Return true or false depending on whether a geometry is an "empty" geometry (no vertices members) ...
Definition: lwgeom.c:1310

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