PostGIS  2.1.10dev-r@@SVN_REVISION@@
int gserialized_get_gbox_p ( const GSERIALIZED g,
GBOX box 
)

Pull a GBOX from the header of a GSERIALIZED, if one is available.

If it is not, calculate it from the geometry. If that doesn't work (null or empty) return LW_FAILURE.

Pull a GBOX from the header of a GSERIALIZED, if one is available.

Definition at line 373 of file g_serialized.c.

References gbox_float_round(), gserialized_peek_gbox_p(), gserialized_read_gbox_p(), LW_SUCCESS, lwgeom_calculate_gbox(), lwgeom_free(), and lwgeom_from_gserialized().

Referenced by BOX2D_combine(), CircTreePIP(), compute_gserialized_stats_mode(), contains(), containsproperly(), convexhull(), coveredby(), covers(), crosses(), disjoint(), geography_bestsrid(), geography_point_outside(), geos_intersects(), isvalid(), isvalidreason(), lwgeom_cmp(), lwgeom_eq(), lwgeom_ge(), lwgeom_gt(), lwgeom_le(), lwgeom_lt(), optimistic_overlap(), overlaps(), ST_Equals(), and touches().

374 {
375  /* Try to just read the serialized box. */
376  if ( gserialized_read_gbox_p(g, box) == LW_SUCCESS )
377  {
378  return LW_SUCCESS;
379  }
380  /* No box? Try to peek into simpler geometries and */
381  /* derive a box without creating an lwgeom */
382  else if ( gserialized_peek_gbox_p(g, box) == LW_SUCCESS )
383  {
384  return LW_SUCCESS;
385  }
386  /* Damn! Nothing for it but to create an lwgeom... */
387  /* See http://trac.osgeo.org/postgis/ticket/1023 */
388  else
389  {
390  LWGEOM *lwgeom = lwgeom_from_gserialized(g);
391  int ret = lwgeom_calculate_gbox(lwgeom, box);
392  gbox_float_round(box);
393  lwgeom_free(lwgeom);
394  return ret;
395  }
396 }
int gserialized_read_gbox_p(const GSERIALIZED *g, GBOX *gbox)
Pull a GBOX from the header of a GSERIALIZED, if one is available.
Definition: g_serialized.c:159
LWGEOM * lwgeom_from_gserialized(const GSERIALIZED *g)
Allocate a new LWGEOM from a GSERIALIZED.
static int gserialized_peek_gbox_p(const GSERIALIZED *g, GBOX *gbox)
Definition: g_serialized.c:206
void lwgeom_free(LWGEOM *geom)
Definition: lwgeom.c:1006
#define LW_SUCCESS
Definition: liblwgeom.h:55
int lwgeom_calculate_gbox(const LWGEOM *lwgeom, GBOX *gbox)
Calculate bounding box of a geometry, automatically taking into account whether it is cartesian or ge...
Definition: lwgeom.c:608
void gbox_float_round(GBOX *gbox)
Round given GBOX to float boundaries.
Definition: g_box.c:641

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