VirtualBox

source: vbox/trunk/src/VBox/Runtime/generic/RTUuidCreate-generic.cpp@ 11413

Last change on this file since 11413 was 11413, checked in by vboxsync, 16 years ago

Runtime: small fix to the UUID code, splitting the ClockSeq field and put the UUID variant in the right place. Rest is cleanup and documenting that the IPRT UUIDs are little endian.

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 2.1 KB
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1/* $Id: RTUuidCreate-generic.cpp 11413 2008-08-14 08:03:03Z vboxsync $ */
2/** @file
3 * IPRT - UUID, Generic RTUuidCreate implementation.
4 */
5
6/*
7 * Copyright (C) 2006-2007 Sun Microsystems, Inc.
8 *
9 * This file is part of VirtualBox Open Source Edition (OSE), as
10 * available from http://www.virtualbox.org. This file is free software;
11 * you can redistribute it and/or modify it under the terms of the GNU
12 * General Public License (GPL) as published by the Free Software
13 * Foundation, in version 2 as it comes in the "COPYING" file of the
14 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16 *
17 * The contents of this file may alternatively be used under the terms
18 * of the Common Development and Distribution License Version 1.0
19 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
20 * VirtualBox OSE distribution, in which case the provisions of the
21 * CDDL are applicable instead of those of the GPL.
22 *
23 * You may elect to license modified versions of this file under the
24 * terms and conditions of either the GPL or the CDDL or both.
25 *
26 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
27 * Clara, CA 95054 USA or visit http://www.sun.com if you need
28 * additional information or have any questions.
29 */
30
31
32/*******************************************************************************
33* Header Files *
34*******************************************************************************/
35#include <iprt/uuid.h>
36#include <iprt/assert.h>
37#include <iprt/err.h>
38#include <iprt/rand.h>
39
40
41/* WARNING: This implementation ASSUMES little endian. Does not work on big endian! */
42
43/* Remember, the time fields in the UUID must be little endian. */
44
45
46RTDECL(int) RTUuidCreate(PRTUUID pUuid)
47{
48 /* validate input. */
49 AssertPtrReturn(pUuid, VERR_INVALID_PARAMETER);
50
51 RTRandBytes(pUuid, sizeof(*pUuid));
52 pUuid->Gen.u8ClockSeqHiAndReserved = (pUuid->Gen.u8ClockSeqHiAndReserved & 0x3f) | 0x80;
53 pUuid->Gen.u16TimeHiAndVersion = (pUuid->Gen.u16TimeHiAndVersion & 0x0fff) | 0x4000;
54
55 return VINF_SUCCESS;
56}
57
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