geometry_to_point()

Datum geometry_to_point

(

PG_FUNCTION_ARGS

)

Definition at line 72 of file geometry_inout.c.

References geometry_to_path(), gserialized_get_type(), lwgeom_as_lwpoint(), lwgeom_from_gserialized(), lwgeom_is_empty(), lwpoint_free(), lwpoint_get_x(), lwpoint_get_y(), PG_FUNCTION_INFO_V1(), POINTTYPE, struct_point::x, and struct_point::y.

Referenced by point_to_geometry().

{
        Point *point;
        LWGEOM *lwgeom;
        LWPOINT *lwpoint;
        GSERIALIZED *geom;

        POSTGIS_DEBUG(2, "geometry_to_point called");

        if ( PG_ARGISNULL(0) )
                PG_RETURN_NULL();

        geom = PG_GETARG_GSERIALIZED_P(0);

        if ( gserialized_get_type(geom) != POINTTYPE )
                elog(ERROR, "geometry_to_point only accepts Points");

        lwgeom = lwgeom_from_gserialized(geom);

        if ( lwgeom_is_empty(lwgeom) )
                PG_RETURN_NULL();

        lwpoint = lwgeom_as_lwpoint(lwgeom);

        point = (Point*)palloc(sizeof(Point));
        point->x = lwpoint_get_x(lwpoint);
        point->y = lwpoint_get_y(lwpoint);

        lwpoint_free(lwpoint);
        PG_FREE_IF_COPY(geom,0);

        PG_RETURN_POINT_P(point);
}

Here is the call graph for this function:

Here is the caller graph for this function: