PostGIS  2.5.1dev-r@@SVN_REVISION@@

◆ geos_difference()

Datum geos_difference ( PG_FUNCTION_ARGS  )

Definition at line 1220 of file postgis/lwgeom_geos.c.

References geometry_serialize(), lwgeom_difference(), lwgeom_free(), lwgeom_from_gserialized(), PG_FUNCTION_INFO_V1(), and pointonsurface().

Referenced by geos_intersection().

1221 {
1222  GSERIALIZED *geom1;
1223  GSERIALIZED *geom2;
1224  GSERIALIZED *result;
1225  LWGEOM *lwgeom1, *lwgeom2, *lwresult ;
1226 
1227  geom1 = PG_GETARG_GSERIALIZED_P(0);
1228  geom2 = PG_GETARG_GSERIALIZED_P(1);
1229 
1230  lwgeom1 = lwgeom_from_gserialized(geom1) ;
1231  lwgeom2 = lwgeom_from_gserialized(geom2) ;
1232 
1233  lwresult = lwgeom_difference(lwgeom1, lwgeom2) ;
1234  result = geometry_serialize(lwresult) ;
1235 
1236  lwgeom_free(lwgeom1) ;
1237  lwgeom_free(lwgeom2) ;
1238  lwgeom_free(lwresult) ;
1239 
1240  PG_FREE_IF_COPY(geom1, 0);
1241  PG_FREE_IF_COPY(geom2, 1);
1242 
1243  PG_RETURN_POINTER(result);
1244 }
LWGEOM * lwgeom_from_gserialized(const GSERIALIZED *g)
Allocate a new LWGEOM from a GSERIALIZED.
void lwgeom_free(LWGEOM *geom)
Definition: lwgeom.c:1144
LWGEOM * lwgeom_difference(const LWGEOM *geom1, const LWGEOM *geom2)
GSERIALIZED * geometry_serialize(LWGEOM *lwgeom)
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