/*

* Copyright (c) 2005 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description: Create a new UID for the policy.

*

*/

#include <random.h>

#include "uuid.h"

void Uuid::MakeUuidL(TUuid& aUuid, TUuidVersion aVersion)

/**

 * Generate a UUID of the specified version.

 * NOTE. As of this writing, only version 4

 * (ERandomBased) is supported

 **/

    {

    // We currently support only version 4

    if (aVersion != ERandomBased)

        {

        User::Leave(KErrNotSupported);

        }

    /* Fill UUID with random data */

    RandomizeL(aUuid);

    /* Brand UUID with version and variant */

    Brand(aUuid, aVersion);

    }

void Uuid::RandomizeL(TUuid& aUuid)

/**

 * Fill the UUID with pseudo-random data

 */

    {

    // Delegate the task to the Symbian Random Number Generator

    // (we trust that it is the best alternative available)

    TPckg<TUuid> pckgUuid(aUuid);

    TRandom::RandomL(pckgUuid);

    }

void Uuid::Brand(TUuid& aUuid, TUuidVersion aVersion)

/**

 * Set variant and version information to the UUID

 */

    {

    // We currently support only UUID version 4

    if (aVersion != ERandomBased)

        {

        return;

        }

    // First set the variant information to value:

    //     Msb0     Msb1    Msb2

    //     1        0       x

    // as specified in draft-mealling-uuid-urn-05.txt

    // (a variable number of the most significant bits

    // of the eight octet of the UUID, i.e. the

    // clock_seq_hi_and_reserved octet)

    aUuid.iClockSeqHiAndReserved &= 0x3F;     // Set Msb0 and Msb1 to 0, take the rest "as-is"

    aUuid.iClockSeqHiAndReserved |= (1 << 7); // Set Msb0 to 1

    // Then set the version number to indicate version 4

    //     Msb0     Msb1    Msb2    Msb3

    //     0        1       0       0

    // as specified in draft-mealling-uuid-urn-05.txt

    // (in the most significant four bits of the time

    // stamp)

    aUuid.iTimeHiAndVersion &= 0x0FFF;    // Set Msb0-Msb3 to 0, take the rest "as-is"

    aUuid.iTimeHiAndVersion |= (1 << 14); // Set Msb1 to 1

    }

void Uuid::UuidToString(const TUuid& aUuid, TUuidString& aUuidString)

/**

 * Create and return a string representation of the given UUID.

 * E.g. f81d4fae-7dec-11d0-a765-00a0c91e6bf6

 */

    {

    aUuidString.Format(KUuidFormatString,

                       static_cast<TUint>(aUuid.iTimeLow),

                       static_cast<TUint>(aUuid.iTimeMid),

                       static_cast<TUint>(aUuid.iTimeHiAndVersion),

                       static_cast<TUint>(aUuid.iClockSeqHiAndReserved),

                       static_cast<TUint>(aUuid.iClockSeqLow),

                       static_cast<TUint>(aUuid.iNode[0]),

                       static_cast<TUint>(aUuid.iNode[1]),

                       static_cast<TUint>(aUuid.iNode[2]),

                       static_cast<TUint>(aUuid.iNode[3]),

                       static_cast<TUint>(aUuid.iNode[4]),

                       static_cast<TUint>(aUuid.iNode[5]));

    }

void Uuid::UuidToString(const TUuid& aUuid, TUuidString8& aUuidString)

/**

 * Create and return a string representation of the given UUID.

 * E.g. f81d4fae-7dec-11d0-a765-00a0c91e6bf6

 */

    {

    aUuidString.Format(KUuidFormatString8,

                       static_cast<TUint>(aUuid.iTimeLow),

                       static_cast<TUint>(aUuid.iTimeMid),

                       static_cast<TUint>(aUuid.iTimeHiAndVersion),

                       static_cast<TUint>(aUuid.iClockSeqHiAndReserved),

                       static_cast<TUint>(aUuid.iClockSeqLow),

                       static_cast<TUint>(aUuid.iNode[0]),

                       static_cast<TUint>(aUuid.iNode[1]),

                       static_cast<TUint>(aUuid.iNode[2]),

                       static_cast<TUint>(aUuid.iNode[3]),

                       static_cast<TUint>(aUuid.iNode[4]),

                       static_cast<TUint>(aUuid.iNode[5]));

    }