Re: [GENERAL] random() function produces wrong range - Mailing list pgsql-hackers

From Stephan Szabo
Subject Re: [GENERAL] random() function produces wrong range
Date
Msg-id Pine.BSF.4.10.10008011248400.25036-100000@megazone23.bigpanda.com
Whole thread Raw
In response to Re: [GENERAL] random() function produces wrong range  (Tom Lane <tgl@sss.pgh.pa.us>)
List pgsql-hackers
On Tue, 1 Aug 2000, Tom Lane wrote:

> Stephan Szabo <sszabo@megazone23.bigpanda.com> writes:
> > Actually, on my machines, both man pages for rand() and random() say
> > they return values between 0 and RAND_MAX (whether that's true or not
> > is another matter).  In my case RAND_MAX==INT_MAX so the change wouldn't
> > be a problem, but it might be problematic on some of the 64 bit machines.
>
> Oh, that's interesting.  What platform do you use?  If RAND_MAX applies
> to random() on some machines that'd probably explain why the code is
> written like it is.  But on my box (HPUX) the rand() function is old
> and crufty and considerably different from random().

That's from a pair of linux boxes, although checking on a FreeBSD box a
friend has, his boxes man pages show the range as explicitly 0 to 2^31-1
as your box does.



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