1 /*
2  * Copyright (c) 1993 Martin Birgmeier
3  * All rights reserved.
4  *
5  * You may redistribute unmodified or modified versions of this source
6  * code provided that the above copyright notice and this and the
7  * following conditions are retained.
8  *
9  * This software is provided ``as is'', and comes with no warranties
10  * of any kind. I shall in no event be liable for anything that happens
11  * to anyone/anything when using this software.
12  */
13 
14 #include "rand48.h"
15 
16 double
17 _DEFUN (_erand48_r, (r, xseed),
18        struct _reent *r _AND
19        unsigned short xseed[3])
20 {
21   __dorand48(r, xseed);
22   return ldexp((double) xseed[0], -48) +
23     ldexp((double) xseed[1], -32) +
24     ldexp((double) xseed[2], -16);
25 }
26 
27 #ifndef _REENT_ONLY
28 double
29 _DEFUN (erand48, (xseed),
30        unsigned short xseed[3])
31 {
32   return _erand48_r (_REENT, xseed);
33 }
34 #endif /* !_REENT_ONLY */
35