--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/skins/AknSkins/srvsrc/AknsSrvFileBuffer.cpp	Thu Dec 17 09:14:12 2009 +0200
@@ -0,0 +1,181 @@
+/*
+* Copyright (c) 2003-2008 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:  Skin serv's file buffer.
+*
+*/
+
+
+// INCLUDE FILES
+
+#include "AknsSrvFileBuffer.h"
+
+// CONSTANTS
+
+static const int KAknsSrvFileBufSize = 10*1024;
+
+// ============================ MEMBER FUNCTIONS ===============================
+
+// -----------------------------------------------------------------------------
+// C++ Constructor
+// -----------------------------------------------------------------------------
+//
+CAknsSrvFileBuffer::CAknsSrvFileBuffer()
+    // CBase initializes: iBuffer(0), iPosition(0), iLength(0)
+    {
+    }
+
+// -----------------------------------------------------------------------------
+// Destructor
+// -----------------------------------------------------------------------------
+//
+CAknsSrvFileBuffer::~CAknsSrvFileBuffer()
+    {
+    delete iData;
+    delete iContent;
+    delete iBuffer;
+    }
+
+// -----------------------------------------------------------------------------
+// Two-phased constructor
+// -----------------------------------------------------------------------------
+//
+void CAknsSrvFileBuffer::ConstructL(RFile& aFilehandle)
+    {
+    iBuffer = HBufC8::NewL( KAknsSrvFileBufSize );
+    iContent = ContentAccess::CContent::NewL(aFilehandle);
+    iData = iContent->OpenContentL(ContentAccess::EView, ContentAccess::EContentShareReadOnly);
+    FillBufferL();
+    }
+
+// -----------------------------------------------------------------------------
+// CAknsSrvFileBuffer::NewL
+// -----------------------------------------------------------------------------
+//
+CAknsSrvFileBuffer* CAknsSrvFileBuffer::NewL( RFile& aFilehandle )
+    {
+    CAknsSrvFileBuffer* self = new (ELeave) CAknsSrvFileBuffer( );
+    CleanupStack::PushL( self );
+    self->ConstructL(aFilehandle);
+    CleanupStack::Pop( self );
+    return self;
+    }
+
+
+// -----------------------------------------------------------------------------
+// CAknsSrvFileBuffer::GetInt32L
+// -----------------------------------------------------------------------------
+//
+TInt32 CAknsSrvFileBuffer::GetInt32L( const TUint aOffset )
+    {
+    ReadToBufferL( aOffset, 4 );
+    TInt32 value;
+    Mem::Copy( &value, PtrToBuffer(aOffset), 4 );
+    return value;
+    }
+
+// -----------------------------------------------------------------------------
+// CAknsSrvFileBuffer::GetUint16L
+// -----------------------------------------------------------------------------
+//
+TUint16 CAknsSrvFileBuffer::GetUint16L( const TUint aOffset )
+    {
+    ReadToBufferL( aOffset, 2 );
+    TUint16 value;
+    Mem::Copy( &value, PtrToBuffer(aOffset), 2 );
+    return value;
+    }
+
+// -----------------------------------------------------------------------------
+// CAknsSrvFileBuffer::GetInt16L
+// -----------------------------------------------------------------------------
+//
+TInt16 CAknsSrvFileBuffer::GetInt16L( const TUint aOffset )
+    {
+    ReadToBufferL( aOffset, 2 );
+    TInt16 value;
+    Mem::Copy( &value, PtrToBuffer(aOffset), 2 );
+    return value;
+    }
+
+// -----------------------------------------------------------------------------
+// CAknsSrvFileBuffer::GetUint8L
+// -----------------------------------------------------------------------------
+//
+TUint8 CAknsSrvFileBuffer::GetUint8L( const TUint aOffset )
+    {
+    ReadToBufferL( aOffset, 1 );
+    TUint8 value;
+    Mem::Copy( &value, PtrToBuffer(aOffset), 1 );
+    return value;
+    }
+
+// -----------------------------------------------------------------------------
+// CAknsSrvFileBuffer::PtrToBuffer
+// -----------------------------------------------------------------------------
+//
+const TAny* CAknsSrvFileBuffer::PtrToBuffer( const TUint aOffset ) const
+    {
+    return (iBuffer->Ptr()) + aOffset - iPosition;
+    }
+
+// -----------------------------------------------------------------------------
+// CAknsSrvFileBuffer::ReadToBufferL
+// -----------------------------------------------------------------------------
+//
+void CAknsSrvFileBuffer::ReadToBufferL( const TUint aOffset, const TUint aSize )
+    {
+    if( IsWithin( aOffset, aSize ) )
+        {
+        return;
+        }
+
+    iPosition = static_cast<TInt>(aOffset);
+    FillBufferL();
+
+    if( !IsWithin( aOffset, aSize ) )
+        {
+        User::Leave( KErrEof );
+        }
+    }
+
+// -----------------------------------------------------------------------------
+// CAknsSrvFileBuffer::FillBufferL
+// -----------------------------------------------------------------------------
+//
+void CAknsSrvFileBuffer::FillBufferL()
+    {
+    TPtr8 ptr( iBuffer->Des() );
+
+    iLength = 0;
+
+    User::LeaveIfError( iData->Seek(ESeekStart, iPosition) );
+    User::LeaveIfError( iData->Read(ptr, KAknsSrvFileBufSize));
+    iLength = ptr.Length();
+    }
+
+// -----------------------------------------------------------------------------
+// CAknsSrvFileBuffer::IsWithin
+// -----------------------------------------------------------------------------
+//
+TBool CAknsSrvFileBuffer::IsWithin( const TUint aOffset, const TUint aSize ) const
+    {
+    if( (static_cast<TInt>(aOffset) >= iPosition) &&
+        (static_cast<TInt>(aOffset+aSize) <= (iPosition+iLength)) )
+        {
+        return ETrue;
+        }
+    return EFalse;
+    }
+
+//  End of File