// Copyright (c) 2008-2009 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:
// Simple UUID generation and formatting support
// 
//

/**
 @file
 @internalComponent
*/

#ifndef __UPNPUUID_H__
#define __UPNPUUID_H__

const TInt KNodeMacOctets = 6;
const TInt KUuidStringLen = 36;

typedef TBuf<KUuidStringLen> TUuidString;
typedef TBuf8<KUuidStringLen> TUuidString8;

// Example UUID string: f81d4fae-7dec-11d0-a765-00a0c91e6bf6
_LIT(KUuidFormatString,   "%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x");
_LIT8(KUuidFormatString8, "%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x");

/**
 * Generally known UUID versions.
 * NOTE. This implementation supports
 * only version 4 (ERandomBased)
 */
enum TUuidVersion
    {
    ETimeBased      = (1 << 0), //< v1, time-based version
    EDceSecurity    = (1 << 1), //< v2, DCE Security version
    ENameBasedMd5   = (1 << 2), //< v3, name-based version with MD5 hashing
    ERandomBased    = (1 << 3), //< v4, randomly or pseudo-randomly generated version
    ENameBasedSha1  = (1 << 4)  //< v5, name-based version with SHA-1 hashing
    };

class TUpnpUuid
/**
 * A value type class that represents a UUID
 */
    {
public:    
    TUint32 iTimeLow;               /* bits  0-31 of time field */
    TUint16 iTimeMid;               /* bits 32-47 of time field */
    TUint16 iTimeHiAndVersion;      /* bits 48-59 of time field plus 4 bit version */
    TUint8  iClockSeqHiAndReserved; /* bits  8-13 of clock sequence field plus 2 bit variant */
    TUint8  iClockSeqLow;           /* bits  0-7  of clock sequence field */
    TUint8  iNode[KNodeMacOctets];  /* bits  0-47 of node MAC address */
    };

class UpnpUuid
/**
 * A class for creating UUIDs and formatting them as strings
 */
    {
public:    
    static TInt MakeUuid(TUpnpUuid& aUuid, TUuidVersion aVersion = ERandomBased);
    static void UuidToString(const TUpnpUuid& aUuid, TUuidString8& aUuidString);
    static void GenerateUuidL(RBuf8& aUuid);
    
private:
    static void RandomizeL(TUpnpUuid& aUuid);
    static void Brand(TUpnpUuid& aUuid, TUuidVersion aVersion);
    };

#endif // __UPNPUUID_H__