--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/userlibandfileserver/fileserver/scomp/sc_comp.cpp	Mon Oct 19 15:55:17 2009 +0100
@@ -0,0 +1,971 @@
+// Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of the License "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 "sc_std.h"
+
+
+const TInt KMajorVersionNumber=1;
+const TInt KMinorVersionNumber=1;
+
+_LIT(KRofsName,"Rofs");
+
+#ifdef __WINS__
+_LIT(KRomName,"Win32");
+#else
+_LIT(KRomName,"Rom");
+#endif
+
+_LIT(KCompositeName,"Composite");
+
+
+static void Fault(TCompFault aFault)
+//
+// Report a fault in the composite file system.
+//
+	{
+	User::Panic(_L("COMPFILESYS"),aFault);
+	}
+
+
+CCompFileSystem::CCompFileSystem()
+	{
+	__PRINT1(_L("CCompFileSystem()[0x%x]"), this);
+	}
+
+
+CCompFileSystem::~CCompFileSystem()
+	{
+	__PRINT1(_L("~CCompFileSystem()[0x%x]"),this);
+	if (iMount)
+		{
+		iMount->NullCompFileSystem();
+		}
+	}
+
+
+TInt CCompFileSystem::Install()
+//
+// Install the file system
+//
+	{
+	__PRINT1(_L("CCompFileSystem::Install()[0x%x]"), this);
+	iVersion=TVersion(KMajorVersionNumber,KMinorVersionNumber,KF32BuildVersionNumber);
+	return(SetName(&KCompositeName));
+	}
+
+
+CMountCB* CCompFileSystem::NewMountL() const
+//
+// Create a new mount control block
+//
+	{
+	__PRINT1(_L("CCompFileSystem::NewMountL()[0x%x]"), this);
+	
+ 	// Composite FS is a singleton, and can only have one mount.
+ 	// If it already exists, just return the existin one.
+ 	if (iMount == NULL)
+ 		{
+ 		((CCompFileSystem*)this)->iMount = new(ELeave) CCompMountCB((CCompFileSystem *)this);
+		TRAPD(err,iMount->NewRomMountL());
+		if(err!=KErrNone)
+			{
+			iMount->Close();
+			User::Leave(err);
+			}
+ 		}
+
+	__PRINT1(_L("  created CCompMountCB:0x%x"),iMount);
+
+	return (iMount);
+	}
+
+
+CFileCB* CCompFileSystem::NewFileL() const
+//
+// Create a new file
+//
+	{
+	__PRINT(_L("CCompFileSystem::NewFileL()"));
+	CFileCB* pFile=new(ELeave) CCompFileCB;
+	__PRINT1(_L("file at 0x%x"),pFile);
+	return(pFile);
+	}
+
+
+CDirCB* CCompFileSystem::NewDirL() const
+//
+// create a new directory lister
+//
+	{
+	__PRINT(_L("CCompFileSystem::NewDirL()"));
+	
+	CCompDirCB* pDir=new (ELeave) CCompDirCB;
+	
+	CleanupStack::PushL(pDir);
+	
+	TInt count = iMount->iMounts.Count();
+    TInt  r=KErrNone;
+    
+	for(TInt idx=0; idx<count; idx++)
+		{
+	    TRAPD(err, r=pDir->iDirs.Append(iMount->iMounts[idx].iFs->NewDirL()));
+		if(err!= KErrNone || r != KErrNone)
+			{
+			pDir->Close();
+			User::Leave(err == KErrNone ? r : err);
+			}
+        }
+
+	CleanupStack::Pop(pDir);
+  
+    __PRINT1(_L("dir at 0x%x"),pDir);
+	return(pDir);		
+	}
+
+
+CFormatCB* CCompFileSystem::NewFormatL() const
+//
+// Create a new media formatter
+//
+	{
+	User::Leave(KErrAccessDenied);
+	return(NULL);
+	}
+
+
+void CCompFileSystem::DriveInfo(TDriveInfo& anInfo,TInt /*aDriveNumber*/) const
+//
+// Return drive info
+//
+	{
+	__PRINT(_L("CCompFileSystem::DriveInfo()"));
+	anInfo.iMediaAtt=KMediaAttWriteProtected;
+	anInfo.iDriveAtt=KDriveAttRom|KDriveAttInternal;
+	anInfo.iType=EMediaRom;
+	}
+
+
+TInt CCompFileSystem::DefaultPath(TDes& /*aPath*/) const
+//
+// Return the initial default path.
+//
+	{
+	Fault(ECompFsDefaultPath);
+	return(KErrNone);
+	}
+
+
+CFileSystem* CCompFileSystem::NewL()
+//
+//
+//
+	{
+	__PRINT(_L("CCompFileSystem::NewL()"));
+	CCompFileSystem* pFs = new(ELeave) CCompFileSystem;
+
+	__PRINT1(_L("CompFs=0x%x"),pFs);
+	return (pFs);
+	}
+
+CCompMountCB::~CCompMountCB()
+//
+//
+//
+	{
+  	__PRINT1(_L("~CCompMountCB() this=0x%x"),this);
+  
+	
+	for(TInt mount=iMounts.Count(); mount--;)
+		iMounts[mount].iMount->Close();
+		
+	iMounts.Close();
+
+	if (iFileSystem)
+		{
+		iFileSystem->NullMount();
+		}
+	}
+
+void CCompMountCB::NewRomMountL()
+//
+// Creates a new ROM mount, and adds it to the list.
+//
+{
+	CFileSystem* romFs= GetFileSystem(KRomName);
+	if(!romFs)
+		{
+		User::Leave(KErrNotFound);
+		}
+
+	CMountCB* romMount = romFs->NewMountL();	    	
+    User::LeaveIfError(iMounts.Append(TCompMount(romFs,romMount)));
+}
+	
+
+
+void CCompMountCB::MountL(TBool aForceMount)
+//
+// Mount a media. Only allowed to leave with KErrNoMemory,KErrNotReady,KErrCorrupt,KErrUnknown.
+//
+//
+	{
+	__PRINT(_L("CCompMountCB::MountL()"));
+	// First mount rom
+	RomMount()->SetDrive(&Drive());
+	RomMount()->MountL(aForceMount);
+
+	// Mounts count starts at 1, as ROMFS starts in slot one.
+	// If its still 1 on mount, then no mounts have been added.
+	// To maintain compatibility with the previous version of this API,
+	// (where you couldn't specifically add mounts) in this case we mount
+	// ROFS by default.  
+	// (There would be little point mounting it with only one FS)
+	
+	if (iMounts.Count()==1) 
+		{
+		CFileSystem* rofsFs = GetFileSystem(KRofsName);
+		if(!rofsFs)
+			User::Leave(KErrUnknown);
+		
+		AddFsToCompositeMount(rofsFs);
+		}
+
+	SetVolumeName(_L("RomDrive").AllocL());
+	
+	// combine sizes
+	for(TInt mount=iMounts.Count(); mount--;)
+		iSize+= iMounts[mount].iMount->Size();
+		
+	// no need to update iUniqueID since 0 in both rom and rofs
+	}
+
+
+ TInt CCompMountCB::GetInterface(TInt aInterfaceId,TAny*& aInterface,TAny* aInput) 
+	{
+	// aInterfaceId	: If EAddFsToCompositeMount, method mounts a media and adds to CompFS.
+	//				: Local drive mapping for this mount's drive (CompFS's) 
+	//				  should be alterd to indicate the local drive to be added.
+	// aIntput    	: CFileSystem* for the mount to be added.
+	// aInterFace	: Unused.
+	switch(aInterfaceId)
+		{
+		case CMountCB::EFileAccessor:
+			((CMountCB::MFileAccessor*&) aInterface) = this;
+			return KErrNone;
+
+		case EAddFsToCompositeMount:
+			return(AddFsToCompositeMount((CFileSystem*) aInput));
+
+		case CMountCB::ELocalBufferSupport:
+			{
+			CCompFileCB* file = (CCompFileCB*) aInput;
+			return file?file->TrueFile()->Mount().LocalBufferSupport():KErrNone;
+			}
+
+		default:
+			return (CMountCB::GetInterface(aInterfaceId,aInterface,aInput));
+		}
+	}
+
+/**
+    Mounts a media with the provided filesystem and adds to the composite mount.  
+    Local drive mapping for this mount's drive (CompFS's) should be altered to indicate the local drive to be added.
+*/
+TInt CCompMountCB::AddFsToCompositeMount(CFileSystem* aFileSystem)
+ 	{
+ 	__PRINT1(_L("CCompMountCB::AddFsToCompositeMount(0x%x)"), aFileSystem);
+    
+    CMountCB* newMount=NULL;
+	TRAPD(err,newMount = aFileSystem->NewMountL());
+	if (err==KErrNone)
+		{
+        newMount->InitL(Drive(), aFileSystem);
+        TRAP(err,newMount->MountL(EFalse));
+		if (err==KErrNone)
+			{
+		    err = iMounts.Append(TCompMount(aFileSystem,newMount));
+            if (err!=KErrNone) 
+            return err;	
+
+			TInt r = newMount->AddToCompositeMount(iMounts.Count()-1);
+
+			if(r == KErrNotSupported)
+				r = KErrNone;
+             
+            return r;	
+			}
+	
+		}
+	
+    return err;
+ 	}
+
+TInt CCompMountCB::ReMount()
+//
+// Try and remount this media.
+//
+	{
+	return(0);
+	}
+
+
+void CCompMountCB::Dismounted()
+//
+// Dummy implementation of pure virtual function
+//
+	{}
+
+	
+void CCompMountCB::VolumeL(TVolumeInfo& aVolume) const
+//
+//
+// Return the volume info.
+//
+	{
+	__PRINT(_L("CCompMountCB::VolumeL()"));
+	aVolume.iFree=0;
+	}
+
+
+void CCompMountCB::SetVolumeL(TDes& /*aName*/)
+//
+//
+// Set the volume label.
+//
+	{
+	User::Leave(KErrAccessDenied);
+	}
+
+void CCompMountCB::MkDirL(const TDesC& /*aName*/)
+//
+// Make a directory.
+//
+	{
+	User::Leave(KErrAccessDenied);
+	}
+
+void CCompMountCB::RmDirL(const TDesC& /*aName*/)
+//
+// Remove a directory.
+//
+	{
+	User::Leave(KErrAccessDenied);
+	}
+
+void CCompMountCB::DeleteL(const TDesC& /*aName*/)
+//
+// Delete a file.
+//
+	{
+	User::Leave(KErrAccessDenied);
+	}
+
+void CCompMountCB::RenameL(const TDesC& /*anOldName*/,const TDesC& /*anNewName*/)
+//
+// Rename a file or directory.
+//
+	{
+	User::Leave(KErrAccessDenied);
+	}
+
+void CCompMountCB::ReplaceL(const TDesC& /*anOldName*/,const TDesC& /*anNewName*/)
+//
+// Atomic replace.
+//
+	{
+	User::Leave(KErrAccessDenied);
+	}
+
+
+void CCompMountCB::EntryL(const TDesC& aName,TEntry& anEntry) const
+//
+// Get entry details.
+//
+	{
+	__PRINT(_L("CCompMountCB::EntryL()"));
+	TInt lesserErr = KErrNone;
+	TInt err = KErrPathNotFound;
+	TInt idx = iMounts.Count();
+	
+	// Look for entry on each mount, until it finds one, starting at the top.
+	while(idx--)
+		{
+		TRAP(err, iMounts[idx].iMount->EntryL(aName,anEntry));
+		
+		// There will often be more then one error encountered when trying
+		// to find an entry.  If the entry is not found on any mount, but it
+		// did find its path, it should not return a path error.
+		// To ensure this, the last non-path related error must be remembered.
+		if ((err != KErrPathNotFound) && (err != KErrPathHidden))
+			lesserErr=err;
+		
+		// It can stop looking for the entry when it either finds it
+		// or discovers its hidden. (ie An error other then NotFound)
+		if((err != KErrNotFound) && (err != KErrPathNotFound))
+			break;
+		}
+		
+	if (err!=KErrNone)
+		User::Leave(lesserErr?lesserErr:err);
+	}
+
+
+void CCompMountCB::SetEntryL(const TDesC& /*aName*/,const TTime& /*aTime*/,TUint /*aSetAttMask*/,TUint /*aClearAttMask*/)
+//
+// Set entry details.
+//
+	{
+	User::Leave(KErrAccessDenied);
+	}
+
+
+static TInt InitFile(CFileCB* aCompFile, CFileCB* aTrueFile,CMountCB* aRealMount,TUint8 aQueOffset)
+//
+// Initialise the true file object with values set in the composite file object
+// by TDrive
+//
+	{
+    TRAPD(r,aTrueFile->InitL(&aCompFile->Drive(),&aCompFile->Drive(),aCompFile->FileName().Des().AllocL() ) );
+	if(r!=KErrNone)
+		return(r);
+	
+	aTrueFile->SetMount(aRealMount);
+	aTrueFile->SetShare(aCompFile->Share());
+	r=aTrueFile->Mount().Open();
+	if(r==KErrNone)
+		{
+		// destructor for CFileCB only calls close on the mount if iMountLink set
+		TDblQue<CFileCB>* pQue=(TDblQue<CFileCB>*)((TUint8*)aRealMount+aQueOffset);
+		pQue->AddLast(*aTrueFile);
+		}
+	return(r);
+	}
+
+
+void CCompMountCB::FileOpenL(const TDesC& aName,TUint aMode,TFileOpen anOpen,CFileCB* aFile)
+//
+// Open a file on the current mount.
+//
+	{
+	__PRINT1(_L("CCompMountCB::FileOpenL() %S"), &aName);
+
+
+	TInt err = KErrPathNotFound;
+	TInt lesserErr = KErrNone;
+	CFileCB* pTrueFile = NULL;
+	TInt idx = iMounts.Count();
+	
+	// Look for file on each mount, until it finds one, starting at the top.
+	while(idx--)
+		{
+		CMountCB* mount = iMounts[idx].iMount;
+		pTrueFile = iMounts[idx].iFs->NewFileL();
+		TUint8 offset=(TUint8)(((TUint8*)&iMountQ-(TUint8*)this));
+		err = InitFile(aFile,pTrueFile,mount,offset);
+
+		if(err == KErrNone)
+			TRAP(err, mount->FileOpenL(aName,aMode,anOpen,pTrueFile));
+
+		__PRINT2(_L("opening file on mount %d [err=%d]"),idx,err);
+
+		// If success, stop looking.
+		if (err == KErrNone)
+			break;
+
+		// Not opened, so use Close() to cause file object to be deleted
+		pTrueFile->Close();
+		
+		// If the file is not found on any mount, but it did find its path,
+		// it should not return a path error.
+		// To ensure this, the last non-path related error must be remembered.
+		if ((err != KErrPathNotFound) && (err != KErrPathHidden))
+			lesserErr=err;
+		
+		// Stop search if error other than file cannot be found.
+		// A common error for this will be one of the hidden errors.
+		// Note that for these, the lesser error calculation above
+		// is still needed for these. 
+		if(err != KErrNotFound && err != KErrPathNotFound)
+			break;
+		}
+
+	if (err!=KErrNone)
+		User::Leave(lesserErr?lesserErr:err);
+
+	aFile->SetSize(pTrueFile->Size());
+	aFile->SetAtt(pTrueFile->Att());
+	aFile->SetModified(pTrueFile->Modified());
+	((CCompFileCB*)aFile)->SetTrueFile(pTrueFile);
+	}
+
+
+TInt CCompMountCB::GetFileUniqueId(const TDesC& /* aName */, TInt64& aUniqueId)
+	{
+	// Get unique identifier for the file - for Composite File System will just return zero
+	aUniqueId = MAKE_TINT64(0,0);
+	return KErrNone;
+	}
+
+TInt CCompMountCB::Spare3(TInt /*aVal*/, TAny* /*aPtr1*/, TAny* /*aPtr2*/)
+	{
+	return KErrNotSupported;
+	}
+
+TInt CCompMountCB::Spare2(TInt /*aVal*/, TAny* /*aPtr1*/, TAny* /*aPtr2*/)
+	{
+	return KErrNotSupported;
+	}
+
+TInt CCompMountCB::Spare1(TInt /*aVal*/, TAny* /*aPtr1*/, TAny* /*aPtr2*/)
+	{
+	return KErrNotSupported;
+	}
+
+
+
+static void SetAtt(CDirCB* aDir,TUint8 aOffset,TUint aValue)
+//
+//
+//
+	{	
+	TUint8* pA=(TUint8*)aDir+aOffset;
+	*(TUint*)pA=aValue;	
+	}
+
+	
+static void SetUid(CDirCB* aDir,TUint8 aOffset,TUidType aValue)
+//
+//
+//
+	{
+	TUint8* pU=(TUint8*)aDir+aOffset;
+	*(TUidType*)pU=aValue;
+	}
+
+
+TInt CCompDirCB::InitDir(CDirCB* aTrg,CMountCB* aMount)
+//
+//
+//
+	{
+	TRAPD(r,aTrg->InitL(&Drive()));
+	if(r!=KErrNone)
+		return(r);
+	aTrg->SetMount(aMount);
+	r=aTrg->Mount().Open();
+	if(r!=KErrNone)
+		{
+		aTrg->SetMount(NULL);
+		return(r);
+		}
+	SetAtt(aTrg,(TUint8)((TUint8*)&iAtt-(TUint8*)this),iAtt);
+	SetUid(aTrg,(TUint8)((TUint8*)&iUidType-(TUint8*)this),iUidType);
+	aTrg->Mount().DecLock();
+	return(KErrNone);
+	}
+
+
+void CCompMountCB::DirOpenL(const TDesC& aName,CDirCB* aDir)
+//
+// Open a directory on the current mount.
+//
+	{
+	__PRINT(_L("CCompMountCB::DirOpenL()"));
+	CCompDirCB* pD=(CCompDirCB*)aDir;
+	pD->iMatch=aName.AllocL();
+
+	TInt err = KErrPathNotFound;
+	TInt idx = iMounts.Count();
+	TBool anyFound = EFalse;
+	pD->iCurrentDir = -1;
+
+	while(idx) // Open dir on every mount it exists.
+		{
+		idx--;
+		CDirCB* theDir = pD->iDirs[idx];
+		CMountCB* theMount = iMounts[idx].iMount;
+		err = pD->InitDir(theDir, theMount);
+		if(err == KErrNone)
+			TRAP(err, theMount->DirOpenL(aName,theDir));
+
+		if(err == KErrNone)
+			{
+			if(!anyFound)
+				{
+				anyFound = ETrue;
+				pD->iCurrentDir = idx;
+				}
+			continue;
+			}
+			
+		pD->iDirs[idx]->Close(); // deletes object
+		pD->iDirs[idx] = NULL;
+
+		if (err == KErrPathHidden)
+			{
+			// Dont look for anythng below this hidden dir.
+			break;
+			}
+		else if (err != KErrPathNotFound)
+			{
+			// An unexpected error - make it report this to caller!
+			anyFound = EFalse;
+			break;
+			}
+		}
+
+	// If we broke before bottom, close the remaining
+	while (idx--)
+		{
+		pD->iDirs[idx]->Close();
+		pD->iDirs[idx] = NULL;
+		}
+	
+	// If we didnt find anythng at all, or some other error, leave.
+	if(!anyFound) 
+		User::Leave(err);
+
+	}
+
+	
+void CCompMountCB::RawReadL(TInt64 /*aPos*/,TInt /*aLength*/,const TAny* /*aTrg*/,TInt /*anOffset*/,const RMessagePtr2& /*aMessage*/) const
+//
+// Read up to aLength data directly
+//
+	{
+	User::Leave(KErrAccessDenied);
+	}
+
+
+void CCompMountCB::RawWriteL(TInt64 /*aPos*/,TInt /*aLength*/,const TAny* /*aSrc*/,TInt /*anOffset*/,const RMessagePtr2& /*aMessage*/)
+//
+// Write aLength data
+//
+	{
+	User::Leave(KErrAccessDenied);
+	}
+	
+	
+void CCompMountCB::GetShortNameL(const TDesC& /*aLongName*/,TDes& /*aShortName*/)
+//
+// Return the short name associated with aLongName
+// Assumes all rom names are 8.3
+//
+	{
+	User::Leave(KErrNotSupported);
+	}
+
+
+void CCompMountCB::GetLongNameL(const TDesC& /*aShortName*/,TDes& /*aLongName*/)
+//
+// Return the short name associated with aLongName
+// Assumes all rom names are 8.3
+//
+	{
+	User::Leave(KErrNotSupported);
+	}	
+
+
+void CCompMountCB::IsFileInRom(const TDesC& aFileName,TUint8*& aFileStart)
+//
+// Return the address of the file if it is in rom
+//
+	{
+	__PRINT(_L("CCompMountCB::IsFileInRom()"));
+	TEntry entry;
+	aFileStart=NULL;
+	TInt idx = iMounts.Count();
+
+	while(idx--)
+		{
+		TRAPD(r,iMounts[idx].iMount->EntryL(aFileName,entry));
+		if(r==KErrNone)
+			{
+			// File exists on mount, check whether it is rom-based
+			iMounts[idx].iMount->IsFileInRom(aFileName,aFileStart);
+			break;
+			}
+		else if(r != KErrNotFound && r != KErrPathNotFound)
+			{
+			break;
+			}	
+		}
+	}
+
+
+void CCompMountCB::ReadSectionL(const TDesC& aName,TInt aPos,TAny* aTrg,TInt aLength,const RMessagePtr2& aMessage)
+//
+//	Starting from aPos, read aLength bytes of a file into a Trg, 
+//	regardless of lock state
+//
+	{
+	__PRINT(_L("CCompMountCB::ReadSectionL()"));
+	TInt lesserErr = KErrNone;
+	TInt err = KErrPathNotFound;
+	TInt idx = iMounts.Count();
+	
+	 // Look for file on each mount, until it finds one, starting at the top.
+	while(idx--)
+		{
+		TRAP(err, iMounts[idx].iMount->ReadSectionL(aName,aPos,aTrg,aLength,aMessage));
+		
+		// If the file is not found on any mount, but it did find its path,
+		// it should not return a path error.
+		// To ensure this, the last non-path related error must be remembered.
+		if ((err != KErrPathNotFound) && (err != KErrPathHidden))
+			lesserErr=err;
+			
+		// Break if file was found, it was hidden, or some unexpected error
+		// (ie break if file or pathe not found)
+		// Note: If hidden, lesserErr calulation above still needed.
+		if ((err != KErrNotFound) && (err != KErrPathNotFound))
+			break;
+		}
+		
+	if (err!=KErrNone)
+		User::Leave(lesserErr?lesserErr:err);
+	}
+
+
+CCompFileCB::CCompFileCB()
+	{}
+
+
+CCompFileCB::~CCompFileCB()
+	{
+	__PRINT1(_L("~CCompFileCB()[0x%x]"),this);
+	if(TrueFile())
+		TrueFile()->Close();
+	}
+
+
+void CCompFileCB::RenameL(const TDesC& /*aNewName*/)
+//
+// Rename the file.
+//
+	{
+	User::Leave(KErrAccessDenied);
+	}
+
+
+void CCompFileCB::ReadL(TInt aPos,TInt& aLength,const TAny* aDes,const RMessagePtr2& aMessage)
+//
+// Read from the file.
+//
+	{
+	__PRINT(_L("CCompFileCB::ReadL()"));
+	TrueFile()->ReadL(aPos,aLength,aDes,aMessage);
+	}
+
+
+void CCompFileCB::WriteL(TInt /*aPos*/,TInt& /*aLength*/,const TAny* /*aDes*/,const RMessagePtr2& /*aMessage*/)
+//
+// Write to the file.
+//
+	{
+	User::Leave(KErrAccessDenied);
+	}
+
+
+TInt CCompFileCB::Address(TInt& aPos) const
+//
+// Return address of the file at aPos
+//
+	{
+	__PRINT(_L("CCompFileCB::Address()"));
+	return(TrueFile()->Address(aPos));
+	}
+
+
+void CCompFileCB::SetSizeL(TInt /*aSize*/)
+//
+// Set the file size.
+//
+	{
+	User::Leave(KErrAccessDenied);
+	}
+
+
+void CCompFileCB::SetEntryL(const TTime& /*aTime*/,TUint /*aSetAttMask*/,TUint /*aClearAttMask*/)
+//
+// Set the entry's attributes and modified time.
+//
+	{
+	User::Leave(KErrAccessDenied);
+	}
+
+
+void CCompFileCB::FlushDataL()
+//
+// Commit any buffered date to the media.
+//
+	{
+	User::Leave(KErrAccessDenied);
+	}
+
+
+void CCompFileCB::FlushAllL()
+//
+// Commit any buffered date to the media.
+//
+	{
+	User::Leave(KErrAccessDenied);
+	}
+
+
+TInt CCompFileCB::GetInterface(TInt aInterfaceId,TAny*& aInterface,TAny* aInput)
+	{
+	if (TrueFile())
+	return TrueFile()->GetInterface(aInterfaceId, aInterface, aInput);
+	else
+		return KErrNotSupported;
+	}
+
+
+CCompDirCB::CCompDirCB()
+//
+//
+//
+	{}
+
+
+CCompDirCB::~CCompDirCB()
+//
+//
+//
+	{
+	__PRINT1(_L("~CCompDirCB() [0x%x]"),this);
+	for(TInt dir=iDirs.Count(); dir--;)
+		{
+		if (iDirs[dir])
+			iDirs[dir]->Close();
+		}
+	iDirs.Close();
+	delete iMatch;
+	}
+
+
+void CCompDirCB::ReadL(TEntry& anEntry)
+//
+// Reads the next directory entry.
+//
+	{
+	__PRINT(_L("CCompDirCB::ReadL()"));
+
+	if(Pending())
+		{
+		CDirCB* pDir = iDirs[iCurrentDir];
+		pDir->SetPending(ETrue);
+		TRAPD(r,pDir->ReadL(anEntry));
+		__ASSERT_ALWAYS(r!=KErrEof,Fault(ECompDirReadPending));
+		SetPending(pDir->Pending());
+		User::LeaveIfError(r);
+		return;
+		}
+	
+	if(iCurrentDir < 0)
+		User::Leave(KErrEof);
+
+	TFileName match(*iMatch);
+	TInt namePos=match.LocateReverse(KPathDelimiter)+1; // There is always a path delimiter
+	TPtrC dirName=match.Left(namePos);
+	TFileName filename;
+	TInt err;
+
+	do
+		{
+		CDirCB* theDir = iDirs[iCurrentDir];
+		if(theDir)
+			{
+			FOREVER // loop until we can read no more (EOF or other err)
+					// If non-duplicate entry found, it returns.
+				{
+				TRAP(err, theDir->ReadL(anEntry));
+
+				if(err != KErrNone)
+					break;
+				
+				__PRINT2(_L("CCompDirCB:: ReadL got = '%S' from dir %d"),&anEntry.iName, iCurrentDir);
+
+				filename=dirName;
+				filename+=anEntry.iName;
+				
+				if (!IsDuplicate(filename))
+					return;
+				}
+				
+			// We have either reached EOF for CurrentDir or encounted an error.
+			
+			__PRINT1(_L("CCompDirCB:: ReadL err = %d"),err);
+			
+			if(err != KErrEof)
+				{
+				User::Leave(err);
+				}
+			}
+		}
+
+	while (iCurrentDir--);
+		
+	User::Leave(KErrEof);
+	}
+
+
+TBool CCompDirCB::IsDuplicate(TFileName& aFilename)
+//
+// Is used by ReadL to determine if a file name read is a duplicate of
+// a filename already read bit it.
+//
+	{	
+	RArray<TCompMount>	&mounts = ((CCompMountCB*)&Mount())->iMounts;	
+	TInt count = mounts.Count();
+	TEntry tmpEntry;
+	__PRINT1(_L("theMount->iMounts.Count() = %d"),count);
+	
+	for (TInt idx = iCurrentDir+1; idx < count; idx++)
+		{
+		TRAPD(r, mounts[idx].iMount->EntryL(aFilename,tmpEntry));
+		
+		if ((r == KErrNone) || (r == KErrHidden) || (r == KErrPathHidden))
+			{
+			__PRINT1(_L("CCompDirCB:: Duplicate (r=%d)"),r);
+			return (ETrue);
+			}
+		}		
+	return (EFalse);
+	}
+
+
+void CCompDirCB::StoreLongEntryNameL(const TDesC& aName)
+//
+// Stores the Long Entry Name
+//
+	{
+	__ASSERT_ALWAYS(iCurrentDir >= 0 && iDirs[iCurrentDir] != NULL, Fault(ECompDirStoreLongEntryNameL));
+	iDirs[iCurrentDir]->StoreLongEntryNameL(aName);
+	}
+
+
+extern "C" {
+
+EXPORT_C CFileSystem* CreateFileSystem()
+//
+// Create a new file system
+//
+	{
+	return(CCompFileSystem::NewL());
+	}
+}
+