/* $Id: RTUuidCreate-generic.cpp 76553 2019-01-01 01:45:53Z vboxsync $ */
/** @file
 * IPRT - UUID, Generic RTUuidCreate implementation.
 */

/*
 * Copyright (C) 2006-2019 Oracle Corporation
 *
 * This file is part of VirtualBox Open Source Edition (OSE), as
 * available from http://www.virtualbox.org. This file is free software;
 * you can redistribute it and/or modify it under the terms of the GNU
 * General Public License (GPL) as published by the Free Software
 * Foundation, in version 2 as it comes in the "COPYING" file of the
 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
 *
 * The contents of this file may alternatively be used under the terms
 * of the Common Development and Distribution License Version 1.0
 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
 * VirtualBox OSE distribution, in which case the provisions of the
 * CDDL are applicable instead of those of the GPL.
 *
 * You may elect to license modified versions of this file under the
 * terms and conditions of either the GPL or the CDDL or both.
 */


/*********************************************************************************************************************************
*   Header Files                                                                                                                 *
*********************************************************************************************************************************/
#include <iprt/uuid.h>
#include "internal/iprt.h"

#include <iprt/assert.h>
#include <iprt/errcore.h>
#include <iprt/rand.h>


/* WARNING: This implementation ASSUMES little endian. Does not work on big endian! */

/* Remember, the time fields in the UUID must be little endian. */


RTDECL(int)  RTUuidCreate(PRTUUID pUuid)
{
    /* validate input. */
    AssertPtrReturn(pUuid, VERR_INVALID_PARAMETER);

    RTRandBytes(pUuid, sizeof(*pUuid));
    pUuid->Gen.u8ClockSeqHiAndReserved = (pUuid->Gen.u8ClockSeqHiAndReserved & 0x3f) | 0x80;
    pUuid->Gen.u16TimeHiAndVersion = (pUuid->Gen.u16TimeHiAndVersion & 0x0fff) | 0x4000;

    return VINF_SUCCESS;
}
RT_EXPORT_SYMBOL(RTUuidCreate);