git: 9front

ref: 897bb6acb7e7b0b5bee3b7029da18c46e5b278ae
dir: /sys/src/cmd/unix/drawterm/libc/lnrand.c/

View raw version 
#include	<u.h>
#include	<libc.h>

#define	MASK	0x7fffffffL

long
lnrand(long n)
{
	long slop, v;

	if(n < 0)
		return n;
	slop = MASK % n;
	do
		v = lrand();
	while(v <= slop);
	return v % n;
}