/*

* Copyright (c) 2002-2006 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:   Implementation of the ScanList class.

*

*/

#include "hssscanlist.h"

#include "hssscanoffsets.h"

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

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

// 

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

//

HssScanList::HssScanList():count_m( 0 ), size_m( 0 )

{

}

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

// 

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

//

TUint32 HssScanList::Append( TUint32 size, const HssScanFrame* data_pointer )

{

    if( AddPadding( size  ) >= ( HSS_SCAN_LIST_DATA_SIZE - size_m ) )

    {

        return HSS_APPEND_FAILED_NO_MEMORY;

    }

    TUint8* dst = data_m + size_m;

    const TUint8* src = data_pointer;

    const TUint8* end = data_pointer + size;

    for ( ; src < end; ++dst, ++src )

    {

        *dst = *src;

    }

    // The checking has to been done after copying it to the buffer

    // due it relies the buffers limits.

    if ( CheckData( data_m + size_m ) )

    { // Add data only if it is valid.

        size_m += AddPadding( size );

        ++count_m;

    }

    return size_m;

}

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

// 

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

//

TUint32 HssScanList::Append( TUint32 size )

{

    if ( CheckData( data_m + size_m ) )

    { // Add data only if it is valid.

        size_m += AddPadding( size );

        ++count_m;

    }

    return size_m;

}

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

// 

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

//

TBool HssScanList::CheckData( HssScanFrame* data ) const

{

    // Check that the data is at the range.

    if ( data < data_m || 

         data > data_m + size_m || 

         size_m + sizeof( TUint16 ) > HSS_SCAN_LIST_DATA_SIZE )

    {

        return false;

    }

    // Calculate the length of the data.

    TUint16 size = static_cast<TUint16>( *( reinterpret_cast<const TUint32*>( data + LENGTH_OFFSET ) ) + CNTRL_HEADER_LEN);

    // Check that the whole data fits to the buffer.

    if ( data + size > data_m + HSS_SCAN_LIST_DATA_SIZE )

    {

        return false;

    }

    const TUint8* currentIE;

    // Search mandatory IEs.

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

    {

        // Go through all IEs.

        for ( currentIE = data + BODY_OFFSET;

              ; // No condition here -- it is in the loop.

              currentIE += *( currentIE + 1 ) + 2 )

        {

            if ( currentIE < data + size )

            { // Still searching...

                if ( *currentIE == HSS_MANDATORY_IE_LIST[i] )

                { // We have a match! Lets find out the next one.

                    break;

                }

            }

            else

            { // The IE was not found.

                return false;

            }

        }

    }

    // Data is ok.

    return true;

}