Re: 64-bit srandom()?
Re: 64-bit srandom()?
- Subject: Re: 64-bit srandom()?
- From: "A.M." <email@hidden>
- Date: Wed, 14 Nov 2007 13:57:41 -0500
On Nov 14, 2007, at 1:37 PM, Nick Zitzmann wrote:
I searched around and didn't see anything relevant...
In our 32-bit projects, we're calling:
srandom(time(NULL));
What's the best way of doing something like the above in a 64-bit
program? srandom() takes a 32-bit integer when compiling for both
32-bit and 64-bit, but time() returns a 64-bit integer when
compiling for 64-bit. I guess I have until 2038 to worry about
this, but I'd rather deal with it now...
srandrom() doesn't really care about the actual time- you should just
make sure you seed with the least-significant 32-bits which you can
do with:
int32_t seed=(int32_t)(time(NULL) & 0xff);
srandom(seed);
(Or something like that- untested code.)
Cheers,
M
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