LWGEOM_startpoint_linestring()

Datum LWGEOM_startpoint_linestring

(

PG_FUNCTION_ARGS

)

Definition at line 826 of file lwgeom_ogc.c.

{
        GSERIALIZED *geom = PG_GETARG_GSERIALIZED_P(0);
        GSERIALIZED *ret;
        LWGEOM *lwgeom = lwgeom_from_gserialized(geom);
        LWGEOM *lwpoint = NULL;
        POINT4D pt;
 
        if (lwgeom_startpoint(lwgeom, &pt) == LW_FAILURE)
        {
                PG_RETURN_NULL();
        }
 
        lwpoint = (LWGEOM *)lwpoint_make(lwgeom->srid, lwgeom_has_z(lwgeom), lwgeom_has_m(lwgeom), &pt);
        ret = geometry_serialize(lwpoint);
 
        lwgeom_free(lwgeom);
        lwgeom_free(lwpoint);
 
        PG_FREE_IF_COPY(geom, 0);
        PG_RETURN_POINTER(ret);
}

References LW_FAILURE, lwgeom_free(), lwgeom_from_gserialized(), lwgeom_has_m(), lwgeom_has_z(), lwgeom_startpoint(), lwpoint_make(), and LWGEOM::srid.

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