lib/libc/stdlib/nrand48.c

   1 /*      $NetBSD: nrand48.c,v 1.9 2005/06/12 05:21:28 lukem Exp $        */
   2
   3 /*
   4  * Copyright (c) 1993 Martin Birgmeier
   5  * All rights reserved.
   6  *
   7  * You may redistribute unmodified or modified versions of this source
   8  * code provided that the above copyright notice and this and the
   9  * following conditions are retained.
  10  *
  11  * This software is provided ``as is'', and comes with no warranties
  12  * of any kind. I shall in no event be liable for anything that happens
  13  * to anyone/anything when using this software.
  14  */
  15
  16 #include <sys/cdefs.h>
  17 #if defined(LIBC_SCCS) && !defined(lint)
  18 __RCSID("$NetBSD: nrand48.c,v 1.9 2005/06/12 05:21:28 lukem Exp $");
  19 #endif /* LIBC_SCCS and not lint */
  20
  21 #include "namespace.h"
  22
  23 #include <assert.h>
  24
  25 #include "rand48.h"
  26
  27 #ifdef __weak_alias
  28 __weak_alias(nrand48,_nrand48)
  29 #endif
  30
  31 long
  32 nrand48(unsigned short xseed[3])
  33 {
  34         _DIAGASSERT(xseed != NULL);
  35
  36         __dorand48(xseed);
  37         return (long)((unsigned long) xseed[2] << 15) +
  38             ((unsigned long) xseed[1] >> 1);
  39 }