--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/emailservices/emailstore/message_store/server/src/messagestoreutils.cpp	Thu Dec 17 08:39:21 2009 +0200
@@ -0,0 +1,137 @@
+/*
+* Copyright (c) 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:
+*
+*/
+
+#include "messagestoreutils.h"
+#include "ContainerStoreUtils.h"
+
+
+//internal file copying buffer; the mass drives perform optimally with sizes of
+//128KBs and 256KBs.
+const TInt KInternalCopyBufferSize = 128*1024;
+
+
+/**
+ * 
+ */
+/*public static*/
+void MessageStoreUtils::PrependBufferAndCopyFileL(
+    RFs& aRfs,
+    CContainerStoreUtils& aUtils,
+    const TDesC& aSource,
+    const TDesC& aTarget,
+    const TDesC8& aPrepend )
+    {
+    RFile source;
+    User::LeaveIfError( source.Open(
+        aRfs, aSource, EFileRead | EFileShareAny ) );
+    CleanupClosePushL( source );
+
+    PrependBufferAndCopyFileInternalL(
+        aRfs, aUtils, source, aTarget, aPrepend );
+    
+    CleanupStack::PopAndDestroy( &source );
+    }
+
+/**
+ *
+ */
+/*public static*/
+void MessageStoreUtils::PrependBufferAndMoveFileL(
+    RFs& aRfs,
+    CContainerStoreUtils& aUtils,
+    const TDesC& aSource,
+    const TDesC& aTarget,
+    const TDesC8& aPrepend )
+    {
+    //open the source file.
+    RFile source;
+    User::LeaveIfError( source.Open(
+        aRfs, aSource, EFileRead | EFileShareAny ) );
+    CleanupClosePushL( source );
+
+    PrependBufferAndCopyFileInternalL(
+        aRfs, aUtils, source, aTarget, aPrepend );
+    
+    CleanupStack::PopAndDestroy( &source );
+    
+    User::LeaveIfError( aRfs.Delete( aSource ) );
+    User::LeaveIfError( aRfs.Rename( aTarget, aSource ) );
+    }
+
+/**
+ *
+ */
+/*public static*/
+void MessageStoreUtils::ReplaceFileWithFileL(
+    RFs& aRfs,
+    CContainerStoreUtils& aUtils,
+    RFile& aSource,
+    const TDesC& aTarget )
+    {
+    PrependBufferAndCopyFileInternalL(
+        aRfs, aUtils, aSource, aTarget, KNullDesC8 );
+    }
+
+/**
+ *
+ */
+/*private static*/
+void MessageStoreUtils::PrependBufferAndCopyFileInternalL(
+    RFs& aRfs,
+    CContainerStoreUtils& aUtils,
+    RFile& aSource,
+    const TDesC& aTarget,
+    const TDesC8& aPrepend )
+    {
+    //disk space check.
+        {
+        TInt fileSize;
+        User::LeaveIfError( aSource.Size( fileSize ) );
+        aUtils.LeaveIfLowDiskSpaceL( fileSize + aPrepend.Length() );
+        }
+
+    //prepare the target file. 
+    RFile target;
+    User::LeaveIfError( target.Replace(
+        aRfs, aTarget, EFileRead | EFileWrite ) );
+    CleanupClosePushL( target );
+
+    if ( aPrepend.Size() )
+        {
+        User::LeaveIfError( target.Write( aPrepend ) );
+        }
+    
+    //source-to-target file copying loop.
+        {
+        HBufC8* buf = HBufC8::NewLC( KInternalCopyBufferSize );
+        TPtr8 des = buf->Des();
+    
+        TInt pos = 0;
+        aSource.Seek( ESeekStart, pos );
+        
+        User::LeaveIfError( aSource.Read( des ) );
+        while ( des.Size() )
+            {
+            User::LeaveIfError( target.Write( des ) );
+            User::LeaveIfError( aSource.Read( des ) );
+            }
+
+        CleanupStack::PopAndDestroy( buf );
+        }
+    
+    CleanupStack::PopAndDestroy( &target );
+    }