ARRAY2LWGEOM()

LWGEOM** ARRAY2LWGEOM	(	ArrayType *	array,
		uint32_t	nelems,
		int *	is3d,
		int *	srid
	)

Definition at line 2694 of file postgis/lwgeom_geos.c.

{
    ArrayIterator iterator;
    Datum value;
    bool isnull;
    bool gotsrid = false;
    uint32_t i = 0;
 
        LWGEOM** lw_geoms = palloc(nelems * sizeof(LWGEOM*));
 
#if POSTGIS_PGSQL_VERSION >= 95
    iterator = array_create_iterator(array, 0, NULL);
#else
    iterator = array_create_iterator(array, 0);
#endif
 
        while(array_iterate(iterator, &value, &isnull))
        {
                GSERIALIZED *geom = (GSERIALIZED*) DatumGetPointer(value);
 
        if (isnull)
        {
            continue;
        }
 
                *is3d = *is3d || gserialized_has_z(geom);
 
                lw_geoms[i] = lwgeom_from_gserialized(geom);
                if (!lw_geoms[i]) /* error in creation */
                {
                        lwpgerror("Geometry deserializing geometry");
                        return NULL;
                }
                if (!gotsrid)
                {
            gotsrid = true;
                        *srid = gserialized_get_srid(geom);
                }
                else if (*srid != gserialized_get_srid(geom))
                {
            error_if_srid_mismatch(*srid, gserialized_get_srid(geom));
                        return NULL;
                }
 
                i++;
        }
 
        return lw_geoms;
}

References error_if_srid_mismatch(), gserialized_get_srid(), gserialized_has_z(), lwgeom_from_gserialized(), and genraster::value.

Referenced by cluster_within_distance_garray().

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