I made 'Radoslaw' into 'Ron', for which I apologize. --jg
On 8/28/12, John Gilmore <[email protected]> wrote: > Attempting to distinguish empty files from nul strings and the like > Ron Skorupka writes: > > <begin extract> > Zero-space dataset is real object, consuming real resources (VTOC, > maybe catalog) with no real (as intended) use. > <end extract/> > > but nul strings also consume resources in just this way. The PL/I > varying character string nada of > > declare nada character varying(0) ; > > is comprised of a halfword prefix having the value 0. Or again, its C > analogue is comprised of a single eos-delimiter byte, x'00'. > > --jg > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
