PostGIS  2.5.0dev-r@@SVN_REVISION@@
Datum LWGEOM_shortestline2d ( PG_FUNCTION_ARGS  )

Definition at line 639 of file lwgeom_functions_basic.c.

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

640 {
641  GSERIALIZED *result;
642  GSERIALIZED *geom1 = PG_GETARG_GSERIALIZED_P(0);
643  GSERIALIZED *geom2 = PG_GETARG_GSERIALIZED_P(1);
644  LWGEOM *theline;
645  LWGEOM *lwgeom1 = lwgeom_from_gserialized(geom1);
646  LWGEOM *lwgeom2 = lwgeom_from_gserialized(geom2);
647 
648  error_if_srid_mismatch(lwgeom1->srid, lwgeom2->srid);
649 
650  theline = lwgeom_closest_line(lwgeom1, lwgeom2);
651 
652  if (lwgeom_is_empty(theline))
653  PG_RETURN_NULL();
654 
655  result = geometry_serialize(theline);
656  lwgeom_free(theline);
657  lwgeom_free(lwgeom1);
658  lwgeom_free(lwgeom2);
659 
660  PG_FREE_IF_COPY(geom1, 0);
661  PG_FREE_IF_COPY(geom2, 1);
662  PG_RETURN_POINTER(result);
663 }
LWGEOM * lwgeom_from_gserialized(const GSERIALIZED *g)
Allocate a new LWGEOM from a GSERIALIZED.
void lwgeom_free(LWGEOM *geom)
Definition: lwgeom.c:1137
void error_if_srid_mismatch(int srid1, int srid2)
Definition: lwutil.c:338
int32_t srid
Definition: liblwgeom.h:398
GSERIALIZED * geometry_serialize(LWGEOM *lwgeom)
LWGEOM * lwgeom_closest_line(const LWGEOM *lw1, const LWGEOM *lw2)
Definition: measures.c:42
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:1386

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