Week to date function

<font face="Courier New, Courier, monospace">Hello,<br /><br /> is there any standard function, or a concise solution
basedon set of them, returning a set of dates included in a week of given year and week number? <br /> I ended up with
creatingmy own function as in the example below, but I am curious if I am not opening an open door. <br /><br />
Thanks<br/><br /> Irek.<br /><br /> CREATE OR REPLACE FUNCTION week2date(double precision, double precision) RETURNS
SETOFdate<br /> AS<br /> $_$<br /> SELECT  day<br /> FROM    (<br />     SELECT  to_char(day, 'IYYY')::integer    AS 
iyyy,<br/>             to_char(day, 'IW'  )::integer    AS  iw,<br />             day<br />     FROM    (<br />        
SELECT start + generate_series(0, n)   AS  day<br />         FROM    (<br />             SELECT  start,<br />
                   (stop - start)::integer AS  n<br />             FROM    (<br />                 SELECT 
(to_date($1::text,'YYYY'::text) - interval        '3 days')::date AS   start,<br />                        
(to_date($1::text,'YYYY'::text) + interval '1 year 3 days')::date AS   stop<br />             )       ss<br />        
)      aa<br />     )       bb<br /> )       cc<br /> WHERE   iw = $2 AND iyyy = $1<br /> ORDER<br /> BY      day<br />
$_$<br/> LANGUAGE SQL<br /> IMMUTABLE<br /> ;<br /><br /> SELECT week2date(date_part('year', now()), date_part('week',
now()));<br/>  week2date<br /> ------------<br />  2010-03-22<br />  2010-03-23<br />  2010-03-24<br />  2010-03-25<br
/> 2010-03-26<br />  2010-03-27<br />  2010-03-28<br /> (7 rows)<br /><br /> SELECT week2date(2009, 53);<br />
 week2date<br/> ------------<br />  2009-12-28<br />  2009-12-29<br />  2009-12-30<br />  2009-12-31<br />
 2010-01-01<br/>  2010-01-02<br />  2010-01-03<br /> (7 rows)<br /><br /> SELECT week2date(2010,  1);<br />
 week2date<br/> ------------<br />  2010-01-04<br />  2010-01-05<br />  2010-01-06<br />  2010-01-07<br />
 2010-01-08<br/>  2010-01-09<br />  2010-01-10<br /> (7 rows)<br /><br /></font>