/*

* Copyright (c) 2006-2008 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:  A package class for TConnMonId objects.

*

*/

#include <e32std.h>

#include <rconnmon.h>

#include "log.h"

// ======== MEMBER FUNCTIONS ========

// ---------------------------------------------------------------------------

// Construction

// data is packed to the following format

// |all_data_amount|amount_of_transferring_data_(n)|item0|....|item(n-1)

// each item is packed in following format

// |size_of_item|item's_data

// item's data can be unpacked by MDesSerializer::FromPtr(), implemented by an item's class

// ---------------------------------------------------------------------------

//

ConnMonIdsArrayPckg::ConnMonIdsArrayPckg( const RArray<TConnMonId>& aRef, TUint aBufLen )

    {

    LOGENTRFN("ConnMonIdsArrayPckg::ConnMonIdsArrayPckg()")

    const TUint KItemLengthFieldSize = 1;

    // First 2 elements in buffer will contain the total number of objects and the number of transfered objects

    TUint currentPosition( 2 );

    TInt totalItemCount = aRef.Count();

    LOGIT2("ConnMonIdsArrayPckg: buffer size %d, item count %d", aBufLen, totalItemCount)

    // Create a temporary pointer array table for buffer objects

    RPointerArray<HBufC> items;

    // Add items until all added or buffer full

    for ( TUint i = 0; i < totalItemCount; ++i )

        {

        const HBufC* item( aRef[i].ToBuf() );

        if ( item )

            {

            // Check if there is room in buffer for the next item

            if ( ( currentPosition + KItemLengthFieldSize + item->Length() ) > aBufLen )

                {

                LOGIT4("Buffer full, current position %d, item length %d, buffer size %d, i %d",

                        currentPosition, item->Length(), aBufLen, i)

                delete item;

                item = NULL;

                break;

                }

            currentPosition += KItemLengthFieldSize + item->Length();

            items.Append( item );

            }

        }

    // Check that given buffer length (aBufLen) is not smaller than one

    // item (CConnMonWlanNetwork) + aRef count + items count + item length

    if ( items.Count() == 0 && totalItemCount > 0 )

        {

        aBufLen = 2; // aRef.Count(), items.Count()

        }

    // Allocate memory for buffer

    iBuf = HBufC::New( aBufLen );

    if ( !iBuf )

        {

        LOGIT("ConnMonIdsArrayPckg: out of memory error")

        }

    else

        {

        // Add total and transferred counts to buffer

        iBuf->Des().Append( totalItemCount ); // Total amount of objects

        iBuf->Des().Append( items.Count() ); // Amount of objects in buffer

        // Add item length and item data to buffer

        for ( TUint i = 0; i < items.Count(); ++i )

            {

            iBuf->Des().Append( items[i]->Length() );

            iBuf->Des().Append( *items[i] );

            }

        LOGIT1("Used buffer %d", iBuf->Length())

        }

    items.ResetAndDestroy();

    LOGEXITFN("ConnMonIdsArrayPckg::ConnMonIdsArrayPckg()")

    }

// ---------------------------------------------------------------------------

// Construction

// ---------------------------------------------------------------------------

//

EXPORT_C ConnMonIdsArrayPckg::ConnMonIdsArrayPckg( TUint aBufSize )

    {

    iBuf = HBufC::New( aBufSize );

    }

// ---------------------------------------------------------------------------

// Destruction

// ---------------------------------------------------------------------------

//

EXPORT_C ConnMonIdsArrayPckg::~ConnMonIdsArrayPckg()

    {

    delete iBuf;

    }

// ---------------------------------------------------------------------------

// Unpacking

// ---------------------------------------------------------------------------

//

EXPORT_C void ConnMonIdsArrayPckg::UnpackToL( RArray<TConnMonId>& aRef ) const

    {

    if ( !iBuf || iBuf->Length() < 2 )

        {

        User::Leave( KErrBadDescriptor );

        }

    TUint index( 0 );

    TUint total( (*iBuf)[index++] ); // Amount of data totally to be transferred

    TUint count( (*iBuf)[index++] ); // Amount of packed data

    for ( TUint i = 0; i < count; ++i )

        {

        TUint len( (*iBuf)[index++] );

        TPtrC ptr( iBuf->Mid( index, len ) );

        User::LeaveIfError( aRef.Append( TConnMonId::FromPtrC( ptr ) ) );

        index += len;

        }

    }

// ---------------------------------------------------------------------------

// Getter

// ---------------------------------------------------------------------------

//

EXPORT_C HBufC* ConnMonIdsArrayPckg::Buf() const

    {

    return iBuf;

    }

// End-of-file