1 #include <lib9.h>
2 
3 #define	MASK	0x7fffffffL
4 
5 int
6 nrand(int n)
7 {
8 	long slop, v;
9 
10 	if(n < 0)
11 		return n;
12 	slop = MASK % n;
13 	do
14 		v = lrand();
15 	while(v <= slop);
16 	return v % n;
17 }