gserialized_get_gbox_p()

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 642 of file g_serialized.c.

References gbox_float_round(), gserialized_from_any_size(), 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(), gserialized_cmp(), gserialized_datum_get_box2df_p(), LWGEOM_to_BOX2DF(), optimistic_overlap(), overlaps(), ST_Equals(), ST_Voronoi(), and touches().

{
        /* Try to just read the serialized box. */
        if ( gserialized_read_gbox_p(g, box) == LW_SUCCESS )
        {
                return LW_SUCCESS;
        }
        /* No box? Try to peek into simpler geometries and */
        /* derive a box without creating an lwgeom */
        else if ( gserialized_peek_gbox_p(g, box) == LW_SUCCESS )
        {
                return LW_SUCCESS;
        }
        /* Damn! Nothing for it but to create an lwgeom... */
        /* See http://trac.osgeo.org/postgis/ticket/1023 */
        else
        {
                LWGEOM *lwgeom = lwgeom_from_gserialized(g);
                int ret = lwgeom_calculate_gbox(lwgeom, box);
                gbox_float_round(box);
                lwgeom_free(lwgeom);
                return ret;
        }
}

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