On Tue, Feb 18, 2003 at 06:22:37PM -0800, Paul Herman wrote:
>On Tue, 18 Feb 2003, Anthony Schneider wrote:
>
>> an issue of arc4random return u_int32_t and rand*
>> returning int (ie unsigned vs signed)?
>
>Nope, casting arc4random() to int or casting random() to unsigned
>int won't solve the problem. The problem still is that
>arc4random()'s range is twice that of it's friends'.
I see this as a major advantage of arc4random() - if I want 32-bit
random numbers I don't have to call random() twice and merge the
results. I've never understood why random() was specified to return
a '0' in the MSB.
If you insist on a 31-bit random int, try
(int)(arc4random() & 0x7fffffff)
Peter
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