Re: Generating pseudo-random integers

[Melikamp T. Medley]

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Thanks!

I think I want to write a utility that prints pseudo-random
integers (I have in CL, but I like it fast, so this time in C),
and link it with coreutils. I looked at Paul Eggert's work,
and I won't be able to do any better than that if I spend
years on it :) I want to print uniformly distributed integers
fast, formatted, in bulk if needed. And I want to call it roll.
Let me know if you have a word of advice.

On 02/04/2011 11:35 PM, Eric Blake wrote:
> Using just coreutils, though, I'm afraid your options are slim.  You
> could use 'seq 0 9 | sort -R | head -n1' (or use shuf instead of sort
> -R) to generate one random number at a time, but that gets expensive.
> Or, if you don't mind limiting yourself to 62**6 values (instead of the
> more traditional 2**32), you could do 'mkdir tmp; mktemp -u -p tmp
> XXXXXX'.  But that's the extent of coreutils' randomness exposed to the
> user.
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