1 // Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies).

     2 // All rights reserved.

     3 // This component and the accompanying materials are made available

     4 // under the terms of "Eclipse Public License v1.0"

     5 // which accompanies this distribution, and is available

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

     7 //

     8 // Initial Contributors:

     9 // Nokia Corporation - initial contribution.

    10 //

    11 // Contributors:

    12 //

    13 // Description:

    14 //

    15 

    16 #include "VersitAdditionalStorage.h"

    17 #ifdef SYMBIAN_ENABLE_SPLIT_HEADERS

    18 #include "versit_internal.h"

    19 #endif

    20 

    21 // User includes

    22 #include <versit.h>

    23 

    24 // Constants

    25 const TInt KVersitAdditionalStorageArrayGranularity = 2;

    26 

    27 class TVersitAdditionalStorageItem

    28 /** 

    29 @internalComponent

    30 @released

    31 */

    32     {

    33 public:

    34     inline TVersitAdditionalStorageItem(const TAny* aKey, CBase* aValue)

    35     :   iKey(aKey), iValue(aValue)

    36         {

    37         }

    38 

    39 public:

    40     const TAny* iKey;

    41     CBase* iValue;

    42     };

    43 

    44 

    45 

    46 

    47 CVersitAdditionalStorage::CVersitAdditionalStorage()

    48 :   iStorage(KVersitAdditionalStorageArrayGranularity)

    49     {

    50     }

    51 

    52 

    53 CVersitAdditionalStorage::~CVersitAdditionalStorage()

    54     {

    55     const TInt count = iStorage.Count();

    56     for(TInt i=0; i<count; i++)

    57         {

    58         TVersitAdditionalStorageItem& item = iStorage[i];

    59         delete item.iValue;

    60         }

    61     iStorage.Close();

    62     }

    63 

    64 

    65 CVersitAdditionalStorage* CVersitAdditionalStorage::NewL()

    66     {

    67     return new(ELeave) CVersitAdditionalStorage();

    68     }

    69 

    70 

    71 void CVersitAdditionalStorage::AddToStorageL(const TAny* aKey, CBase* aValue)

    72     {

    73     __ASSERT_ALWAYS(aValue != NULL, Panic(EVersitPanicNullValueAssignedToAdditionalStorageSlot));

    74 

    75     // Check if an additional value has already been stored for this item

    76     CBase* value = FromStorage(aKey);

    77     __ASSERT_ALWAYS(value == NULL, Panic(EVersitPanicAdditionalStorageSlotAlreadyInUse));

    78 

    79     // Create new item

    80     TVersitAdditionalStorageItem newItem(aKey, aValue);

    81     User::LeaveIfError(iStorage.Append(newItem));

    82     }

    83 

    84 

    85 CBase* CVersitAdditionalStorage::FromStorage(const TAny* aKey)

    86     {

    87     CBase* value = NULL;

    88     TInt index = KErrNotFound;

    89     TVersitAdditionalStorageItem* item = ItemByKey(aKey, index);

    90     if  (item)

    91         {

    92         value = item->iValue;

    93         }

    94     return value;

    95     }

    96 

    97 void CVersitAdditionalStorage::FreeStorage(const TAny* aKey)

    98     {

    99     TInt index = KErrNotFound;

   100     TVersitAdditionalStorageItem* item = ItemByKey(aKey, index);

   101     if  (item)

   102         {

   103         delete item->iValue;

   104         iStorage.Remove(index);

   105         }

   106     }

   107 

   108 TVersitAdditionalStorageItem* CVersitAdditionalStorage::ItemByKey(const TAny* aKey, TInt& aIndex)

   109     {

   110     TVersitAdditionalStorageItem* foundItem = NULL;

   111     TVersitAdditionalStorageItem searchFor(aKey, NULL);

   112     TIdentityRelation<TVersitAdditionalStorageItem> relation(ItemsMatch);

   113     //

   114     aIndex = iStorage.Find(searchFor, relation);

   115     if  (aIndex >= 0)

   116         {

   117         foundItem = &iStorage[aIndex];

   118         }

   119     //

   120     return foundItem;

   121     }

   122 

   123 TBool CVersitAdditionalStorage::ItemsMatch(const TVersitAdditionalStorageItem& aLeft, const TVersitAdditionalStorageItem& aRight)

   124     {

   125     return aLeft.iKey == aRight.iKey;

   126     }