LWGEOM_numinteriorrings_polygon()

Datum LWGEOM_numinteriorrings_polygon

(

PG_FUNCTION_ARGS

)

Definition at line 411 of file lwgeom_ogc.c.

References CURVEPOLYTYPE, gserialized_get_type(), lwgeom_free(), lwgeom_from_gserialized(), LWGEOM_interiorringn_polygon(), lwgeom_is_empty(), LWPOLY::nrings, PG_FUNCTION_INFO_V1(), POLYGONTYPE, TRIANGLETYPE, and ovdump::type.

Referenced by LWGEOM_exteriorring_polygon().

{
        GSERIALIZED *geom = PG_GETARG_GSERIALIZED_P(0);
        int type = gserialized_get_type(geom);
        LWGEOM *lwgeom;
        int result = -1;

        if ( (type != POLYGONTYPE) &&
             (type != CURVEPOLYTYPE) &&
             (type != TRIANGLETYPE))
        {
                PG_RETURN_NULL();
        }

        lwgeom = lwgeom_from_gserialized(geom);
        if ( lwgeom_is_empty(lwgeom) )
        {
                result = 0;
        }
        else
        {
                const LWPOLY *poly = (LWPOLY*)lwgeom;
                result = poly->nrings - 1;
        }

        lwgeom_free(lwgeom);
        PG_FREE_IF_COPY(geom, 0);

        if ( result < 0 )
                PG_RETURN_NULL();

        PG_RETURN_INT32(result);
}

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