43 lines
1 KiB
C
43 lines
1 KiB
C
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/* $NetBSD: erand48.c,v 1.9 2006/03/22 20:52:16 drochner Exp $ */
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/*
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* Copyright (c) 1993 Martin Birgmeier
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* All rights reserved.
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*
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* You may redistribute unmodified or modified versions of this source
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* code provided that the above copyright notice and this and the
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* following conditions are retained.
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*
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* This software is provided ``as is'', and comes with no warranties
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* of any kind. I shall in no event be liable for anything that happens
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* to anyone/anything when using this software.
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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__RCSID("$NetBSD: erand48.c,v 1.9 2006/03/22 20:52:16 drochner Exp $");
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#endif /* LIBC_SCCS and not lint */
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#include "namespace.h"
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#include <assert.h>
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#include <math.h>
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#include "rand48.h"
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#ifdef __weak_alias
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__weak_alias(erand48,_erand48)
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#endif
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double
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erand48(unsigned short xseed[3])
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{
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_DIAGASSERT(xseed != NULL);
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__dorand48(xseed);
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return ldexp((double) xseed[0], -48) +
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ldexp((double) xseed[1], -32) +
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ldexp((double) xseed[2], -16);
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}
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