git: 9front

ref: d98e19b458596ff5f2d10d9d42e23d313cb6a9f3
dir: /sys/src/cmd/unix/drawterm/libc/lnrand.c/

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#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;
}