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Date:      Wed, 19 Feb 2003 10:43:08 +0100
From:      Dag-Erling Smorgrav <des@ofug.org>
To:        phk@phk.freebsd.dk
Cc:        Paul Herman <pherman@frenchfries.net>, Peter Jeremy <peterjeremy@optushome.com.au>, FreeBSD Hackers <hackers@FreeBSD.ORG>
Subject:   Re: arc4random() range
Message-ID:  <xzpsmukwqqb.fsf@flood.ping.uio.no>
In-Reply-To: <86890.1045646060@critter.freebsd.dk> (phk@phk.freebsd.dk's message of "Wed, 19 Feb 2003 10:14:20 %2B0100")
References:  <86890.1045646060@critter.freebsd.dk>

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phk@phk.freebsd.dk writes:
> Well, I'm right in principle but wrong in current practice, at
> the very least make it:
>
> #define arc4random31()   (arc4random() & RAND_MAX)

or rather

#define arc4random31()   (arc4random() % (RAND_MAX + 1))

to avoid relying on RAND_MAX being one less than a power of two.

DES
-- 
Dag-Erling Smorgrav - des@ofug.org

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