shithub: riscv

ref: 5a059477f8066f25ece1ba2b8c49ab8ea24d19de
dir: /sys/src/libc/port/lnrand.c/

#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;
}