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

Definition at line 2643 of file postgis/lwgeom_geos.c.

References error_if_srid_mismatch(), errorIfGeometryCollection(), gbox_same_2d_float(), gserialized_get_gbox_p(), gserialized_get_srid(), gserialized_is_empty(), HANDLE_GEOS_ERROR, LW_FALSE, lwgeom_geos_error(), and POSTGIS2GEOS().

2644 {
2645  GSERIALIZED *geom1;
2646  GSERIALIZED *geom2;
2647  GEOSGeometry *g1, *g2;
2648  bool result;
2649  GBOX box1, box2;
2650 
2651  geom1 = PG_GETARG_GSERIALIZED_P(0);
2652  geom2 = PG_GETARG_GSERIALIZED_P(1);
2653 
2654  errorIfGeometryCollection(geom1,geom2);
2656 
2657  /* Empty == Empty */
2658  if ( gserialized_is_empty(geom1) && gserialized_is_empty(geom2) )
2659  PG_RETURN_BOOL(true);
2660 
2661  /*
2662  * short-circuit: If geom1 and geom2 do not have the same bounding box
2663  * we can return FALSE.
2664  */
2665  if ( gserialized_get_gbox_p(geom1, &box1) &&
2666  gserialized_get_gbox_p(geom2, &box2) )
2667  {
2668  if ( gbox_same_2d_float(&box1, &box2) == LW_FALSE )
2669  {
2670  PG_RETURN_BOOL(false);
2671  }
2672  }
2673 
2674  /*
2675  * short-circuit: if geom1 and geom2 are binary-equivalent, we can return
2676  * TRUE. This is much faster than doing the comparison using GEOS.
2677  */
2678  if (VARSIZE(geom1) == VARSIZE(geom2) && !memcmp(geom1, geom2, VARSIZE(geom1))) {
2679  PG_RETURN_BOOL(true);
2680  }
2681 
2682  initGEOS(lwpgnotice, lwgeom_geos_error);
2683 
2684  g1 = (GEOSGeometry *)POSTGIS2GEOS(geom1);
2685 
2686  if (!g1)
2687  HANDLE_GEOS_ERROR("First argument geometry could not be converted to GEOS");
2688 
2689  g2 = (GEOSGeometry *)POSTGIS2GEOS(geom2);
2690 
2691  if (!g2)
2692  {
2693  GEOSGeom_destroy(g1);
2695  "Second argument geometry could not be converted to GEOS");
2696  }
2697 
2698  result = GEOSEquals(g1,g2);
2699 
2700  GEOSGeom_destroy(g1);
2701  GEOSGeom_destroy(g2);
2702 
2703  if (result == 2) HANDLE_GEOS_ERROR("GEOSEquals");
2704 
2705  PG_FREE_IF_COPY(geom1, 0);
2706  PG_FREE_IF_COPY(geom2, 1);
2707 
2708  PG_RETURN_BOOL(result);
2709 }
int gserialized_get_gbox_p(const GSERIALIZED *g, GBOX *box)
Read the bounding box off a serialization and calculate one if it is not already there.
Definition: g_serialized.c:639
void error_if_srid_mismatch(int srid1, int srid2)
Definition: lwutil.c:338
int gserialized_is_empty(const GSERIALIZED *g)
Check if a GSERIALIZED is empty without deserializing first.
Definition: g_serialized.c:178
void lwgeom_geos_error(const char *fmt,...)
#define LW_FALSE
Definition: liblwgeom.h:76
GEOSGeometry * POSTGIS2GEOS(GSERIALIZED *pglwgeom)
#define HANDLE_GEOS_ERROR(label)
int gbox_same_2d_float(const GBOX *g1, const GBOX *g2)
Check if two given GBOX are the same in x and y, or would round to the same GBOX in x and if serializ...
Definition: g_box.c:194
int32_t gserialized_get_srid(const GSERIALIZED *s)
Extract the SRID from the serialized form (it is packed into three bytes so this is a handy function)...
Definition: g_serialized.c:99
void errorIfGeometryCollection(GSERIALIZED *g1, GSERIALIZED *g2)
Throws an ereport ERROR if either geometry is a COLLECTIONTYPE.

Here is the call graph for this function: