Re: *printf and zero size

[Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>]

Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> Tom, did you implement this functionality in *printf?
> 	The size may be given as zero to find out how many characters are
> 	needed; in this case, the str argument is ignored. Sprintf() and
> 	vsprintf() effectively assume an infinite size.

Where do you read that?  The SUS says the opposite:

	If the value of n is zero on a call to snprintf(), an unspecified
	value less than 1 is returned. 

and that's what our code implements.

			regards, tom lane