PostGIS  2.1.10dev-r@@SVN_REVISION@@
Datum LWGEOM_force_2d ( PG_FUNCTION_ARGS  )

Definition at line 339 of file lwgeom_functions_basic.c.

References geometry_serialize(), gserialized_ndims(), lwgeom_force_2d(), lwgeom_free(), and lwgeom_from_gserialized().

340 {
341  GSERIALIZED *pg_geom_in = (GSERIALIZED *)PG_DETOAST_DATUM(PG_GETARG_DATUM(0));
342  GSERIALIZED *pg_geom_out;
343  LWGEOM *lwg_in, *lwg_out;
344 
345  /* already 2d */
346  if ( gserialized_ndims(pg_geom_in) == 2 ) PG_RETURN_POINTER(pg_geom_in);
347 
348  lwg_in = lwgeom_from_gserialized(pg_geom_in);
349  lwg_out = lwgeom_force_2d(lwg_in);
350  pg_geom_out = geometry_serialize(lwg_out);
351  lwgeom_free(lwg_out);
352  lwgeom_free(lwg_in);
353 
354  PG_FREE_IF_COPY(pg_geom_in, 0);
355  PG_RETURN_POINTER(pg_geom_out);
356 }
LWGEOM * lwgeom_from_gserialized(const GSERIALIZED *g)
Allocate a new LWGEOM from a GSERIALIZED.
void lwgeom_free(LWGEOM *geom)
Definition: lwgeom.c:1006
int gserialized_ndims(const GSERIALIZED *gser)
Return the number of dimensions (2, 3, 4) in a geometry.
Definition: g_serialized.c:40
LWGEOM * lwgeom_force_2d(const LWGEOM *geom)
Strip out the Z/M components of an LWGEOM.
Definition: lwgeom.c:646
GSERIALIZED * geometry_serialize(LWGEOM *lwgeom)

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