#include "os.h"#include <libsec.h>#define Maxrand ((1UL<<31)-1)ulongnfastrand(ulong n){ ulong m, r; /* * set m to the maximum multiple of n <= 2^31-1 * so we want a random number < m. */ if(n > Maxrand) sysfatal("nfastrand: n too large"); m = Maxrand - Maxrand % n; while((r = fastrand()) >= m) ; return r%n;}
#include "os.h"
#include <libsec.h>
#define Maxrand ((1UL<<31)-1)
ulong
nfastrand(ulong n)
{
ulong m, r;
/*
* set m to the maximum multiple of n <= 2^31-1
* so we want a random number < m.
*/
if(n > Maxrand)
sysfatal("nfastrand: n too large");
m = Maxrand - Maxrand % n;
while((r = fastrand()) >= m)
;
return r%n;
}