ST_GeneratePoints()

Datum ST_GeneratePoints

(

PG_FUNCTION_ARGS

)

Definition at line 1047 of file postgis/lwgeom_geos.c.

References gserialized_from_lwgeom(), lwgeom_free(), lwgeom_from_gserialized(), lwgeom_to_points(), PG_FUNCTION_INFO_V1(), and ST_OffsetCurve().

Referenced by buffer().

{
        GSERIALIZED     *gser_input;
        GSERIALIZED *gser_result;
        LWGEOM *lwgeom_input;
        LWGEOM *lwgeom_result;
        int32 npoints;

        gser_input = PG_GETARG_GSERIALIZED_P(0);
        npoints = DatumGetInt32(DirectFunctionCall1(numeric_int4, PG_GETARG_DATUM(1)));

        /* Smartasses get nothing back */
        if (npoints < 0)
                PG_RETURN_NULL();

        /* Types get checked in the code, we'll keep things small out there */
        lwgeom_input = lwgeom_from_gserialized(gser_input);
        lwgeom_result = (LWGEOM*)lwgeom_to_points(lwgeom_input, npoints);
        lwgeom_free(lwgeom_input);
        PG_FREE_IF_COPY(gser_input, 0);

        /* Return null as null */
        if (!lwgeom_result)
                PG_RETURN_NULL();

        /* Serialize and return */
        gser_result = gserialized_from_lwgeom(lwgeom_result, 0);
        lwgeom_free(lwgeom_result);
        PG_RETURN_POINTER(gser_result);
}

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