box2d_to_lwgeom box3d_to_lwgeom gserialized_3Ddistance gserialized_3Dintersects gserialized_array_union gserialized_azimuth gserialized_boundary gserialized_distance gserialized_dwithin gserialized_dwithin3d gserialized_geog_distance gserialized_geog_dwithin gserialized_geog_from_geom gserialized_geog_in gserialized_geog_length gserialized_geog_out gserialized_geom_from_geog gserialized_inter_contains gserialized_intersection gserialized_line_interpolate_point gserialized_line_locate_point gserialized_line_substring gserialized_numpoints_linestring gserialized_pointn_linestring gserialized_relate_pattern gserialized_reverse gserialized_shortestline2d gserialized_shortestline3d gserialized_touches lwgeom_line_interpolate_point

gserialized_numpoints_linestring() int gserialized_numpoints_linestring ( const GSERIALIZED *  geom ) numpoints(LINESTRING) – return the number of points in the linestring, or NULL if it is not a linestring