1 #include <u.h> 2 #include <libc.h> 3 4 #define MASK 0x7fffffffL 5 6 int nrand(int n)7 nrand(int n) 8 { 9 long slop, v; 10 11 if(n < 0) 12 return n; 13 slop = MASK % n; 14 do 15 v = lrand(); 16 while(v <= slop); 17 return v % n; 18 } 19