2.11BSD/src/lib/libc/compat-4.1/rand.c

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/*
 * Copyright (c) 1980 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 */

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)rand.c	5.2 (Berkeley) 3/9/86";
#endif LIBC_SCCS and not lint

static	long	randx = 1;

srand(x)
unsigned x;
{
	randx = x;
}

rand()
{
#ifdef pdp11
	return(((randx = randx * 1103515245 + 12345)>>16) & 0x7fff);
#else
	return((randx = randx * 1103515245 + 12345) & 0x7fffffff);
#endif
}