Array to rowset function

I have a function to convert a single dimension array to a row set

CREATE OR REPLACE FUNCTION arraytotable(anyarray)
  RETURNS SETOF anyelement AS
'
DECLARE

theData ALIAS FOR $1;
count integer;
start integer;

BEGIN
      start :=array_lower(theData,1);
      count :=array_upper(theData,1);
      IF start is not null THEN
      FOR i IN start..count LOOP
            RETURN NEXT theData[i];
      END LOOP;
      END IF;

RETURN;
END
'
  LANGUAGE 'plpgsql' IMMUTABLE STRICT;

Is there a more efficient way I can do this and are there any user defined
C functions available for this sort of array manipulation?

Thanks for any help
Laurie


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