ref: 354d513a481471aed9458886ec942aa9c8bd1dc9
dir: /libc/nrand.c/
#include <u.h>
#include <libc.h>
#define MASK 0x7fffffffL
int
nrand(int n)
{
long slop, v;
if(n < 0)
return n;
slop = MASK % n;
do
v = lrand();
while(v <= slop);
return v % n;
}