ARRAY2GEOS()

GEOSGeometry** ARRAY2GEOS	(	ArrayType *	array,
		uint32_t	nelems,
		int *	is3d,
		int *	srid
	)

Definition at line 3048 of file postgis/lwgeom_geos.c.

References error_if_srid_mismatch(), dumpnode::geom, GEOSnoop(), gserialized_get_srid(), gserialized_has_z(), PG_FUNCTION_INFO_V1(), POSTGIS2GEOS(), and genraster::value.

Referenced by clusterintersecting_garray(), and polygonize_garray().

{
    ArrayIterator iterator;
    Datum value;
    bool isnull;
    bool gotsrid = false;
    uint32_t i = 0;

        GEOSGeometry** geos_geoms = palloc(nelems * sizeof(GEOSGeometry*));

#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);

                geos_geoms[i] = (GEOSGeometry*) POSTGIS2GEOS(geom);
                if (!geos_geoms[i])   /* exception thrown at construction */
                {
            uint32_t j;
            lwpgerror("Geometry could not be converted to GEOS");

                        for (j = 0; j < i; j++) {
                                GEOSGeom_destroy(geos_geoms[j]);
                        }
                        return NULL;
                }

                if (!gotsrid)
                {
                        *srid = gserialized_get_srid(geom);
            gotsrid = true;
                }
                else if (*srid != gserialized_get_srid(geom))
                {
            uint32_t j;
            error_if_srid_mismatch(*srid, gserialized_get_srid(geom));

            for (j = 0; j <= i; j++) {
                                GEOSGeom_destroy(geos_geoms[j]);
                        }
                        return NULL;
                }

        i++;
        }

    array_free_iterator(iterator);
        return geos_geoms;
}

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