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 }