git: 9front

ref: 33bdd7e6c2bbfc7e2373b4e8d0371fd89dc31e52
dir: /sys/src/libc/port/nrand.c/

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#include	<u.h>
#include	<libc.h>

#define	MASK	0x7fffffffL

int
nrand(int n)
{
	long slop, v;

	if(n < 0)
		return n;
	if(n == 1)
		return 0;
	/* and if n == 0, you deserve what you get */
	slop = MASK % n;
	do
		v = lrand();
	while(v <= slop);
	return v % n;
}