PostGIS  2.3.8dev-r@@SVN_REVISION@@

◆ LWGEOM_closestpoint()

Datum LWGEOM_closestpoint ( PG_FUNCTION_ARGS  )

Definition at line 608 of file lwgeom_functions_basic.c.

References error_if_srid_mismatch(), geometry_serialize(), lwgeom_closest_point(), lwgeom_free(), lwgeom_from_gserialized(), lwgeom_is_empty(), LWGEOM_shortestline2d(), PG_FUNCTION_INFO_V1(), and LWGEOM::srid.

Referenced by LWGEOM_force_sfs().

609 {
610  GSERIALIZED *result;
611  GSERIALIZED *geom1 = PG_GETARG_GSERIALIZED_P(0);
612  GSERIALIZED *geom2 = PG_GETARG_GSERIALIZED_P(1);
613  LWGEOM *point;
614  LWGEOM *lwgeom1 = lwgeom_from_gserialized(geom1);
615  LWGEOM *lwgeom2 = lwgeom_from_gserialized(geom2);
616 
617  error_if_srid_mismatch(lwgeom1->srid, lwgeom2->srid);
618 
619  point = lwgeom_closest_point(lwgeom1, lwgeom2);
620 
621  if (lwgeom_is_empty(point))
622  PG_RETURN_NULL();
623 
624  result = geometry_serialize(point);
625  lwgeom_free(point);
626  lwgeom_free(lwgeom1);
627  lwgeom_free(lwgeom2);
628 
629  PG_FREE_IF_COPY(geom1, 0);
630  PG_FREE_IF_COPY(geom2, 1);
631  PG_RETURN_POINTER(result);
632 }
LWGEOM * lwgeom_closest_point(const LWGEOM *lw1, const LWGEOM *lw2)
Definition: measures.c:54
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
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
Here is the call graph for this function:
Here is the caller graph for this function: