sl@0: // Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: // All rights reserved.
sl@0: // This component and the accompanying materials are made available
sl@0: // under the terms of the License "Eclipse Public License v1.0"
sl@0: // which accompanies this distribution, and is available
sl@0: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: //
sl@0: // Initial Contributors:
sl@0: // Nokia Corporation - initial contribution.
sl@0: //
sl@0: // Contributors:
sl@0: //
sl@0: // Description:
sl@0: // f32test\plugins\hex\t_hexhook.cpp
sl@0: // 
sl@0: //
sl@0: 
sl@0: #include "t_hexhook.h"
sl@0: #include <f32pluginutils.h>
sl@0: #include "hex.h"
sl@0: 
sl@0: _LIT(KHexPluginName, "This is a test plugin which converts binary data to hex");
sl@0: 
sl@0: 
sl@0: /**
sl@0: Leaving New function for the plugin
sl@0: @internalComponent
sl@0: */
sl@0: CTestHexHook* CTestHexHook::NewL()
sl@0: 	{
sl@0: 	return new(ELeave) CTestHexHook;
sl@0: 	}
sl@0: 
sl@0: 
sl@0: /**
sl@0: Constructor for the plugin
sl@0: @internalComponent
sl@0: */
sl@0: CTestHexHook::CTestHexHook()
sl@0: 	{
sl@0: 	}
sl@0: 
sl@0: 
sl@0: /**
sl@0: The destructor for the test hex plugin hook. 
sl@0: @internalComponent
sl@0: */
sl@0: CTestHexHook::~CTestHexHook()
sl@0: 	{
sl@0: 	iFs.Close();
sl@0: 	}
sl@0: 
sl@0: /**
sl@0: Initialise the hex plugin.
sl@0: @internalComponent
sl@0: */
sl@0: void CTestHexHook::InitialiseL()
sl@0: 	{
sl@0: 	User::LeaveIfError(RegisterIntercept(EFsFileOpen,			EPreIntercept));
sl@0: 	User::LeaveIfError(RegisterIntercept(EFsFileRead,			EPrePostIntercept));
sl@0: //	User::LeaveIfError(RegisterIntercept(EFsFileWrite,			EPreIntercept));
sl@0: 
sl@0: 	User::LeaveIfError(iFs.Connect());
sl@0: 	}
sl@0: 
sl@0: /**
sl@0: @internalComponent
sl@0: */
sl@0: TInt CTestHexHook::DoRequestL(TFsPluginRequest& aRequest)
sl@0: 	{
sl@0: 	TInt err = KErrNotSupported;
sl@0: 
sl@0: 	TInt function = aRequest.Function();
sl@0: 	
sl@0: 	iDrvNumber = aRequest.DriveNumber();
sl@0: 
sl@0: 	switch(function)
sl@0: 		{
sl@0: 		case EFsFileOpen:
sl@0: 			err = HexFileOpen(aRequest);
sl@0: 			break;
sl@0: 
sl@0: 		case EFsFileRead:
sl@0: 			// Post intercept does nothing except prove that it is possible and that no deadlock occurs.
sl@0: 			// plugin always calls FileRead() when receiving a EFsFileRead, and so the mesage gets completed
sl@0: 			// by the plugin and has to be post intercepted by the plugin (if registered to post-intercept the request) 
sl@0: 			// and any plugins above it.
sl@0: 
sl@0: 			if (!(aRequest.IsPostOperation()))
sl@0: 				err = HexFileRead(aRequest);
sl@0: 			break;
sl@0: 
sl@0: 		default:
sl@0: 			break;
sl@0: 		}
sl@0: 
sl@0: 	return err;
sl@0: 	}
sl@0: 
sl@0: 
sl@0: /**
sl@0: @internalComponent
sl@0: */
sl@0: TInt CTestHexHook::HexFileOpen(TFsPluginRequest& aRequest)
sl@0: 	{
sl@0: 	TFileName fileName;
sl@0: 
sl@0: 	
sl@0: 	
sl@0: //	TInt driveNumber = aRequest.DriveNumber();
sl@0: 	
sl@0: 	TInt err = GetName(&aRequest, fileName);
sl@0: 	if(err != KErrNone)
sl@0: 		return(err);
sl@0: 	
sl@0: //	err = ScanFile(fileName);
sl@0: 
sl@0: 	return err;
sl@0: 	}
sl@0: 
sl@0: 
sl@0: /**
sl@0: @internalComponent
sl@0: */
sl@0: TInt CTestHexHook::HexFileRead(TFsPluginRequest& aRequest)
sl@0: 	{
sl@0: 	TFileName fileName;
sl@0: 	
sl@0: //	TInt driveNumber = aRequest.DriveNumber();
sl@0: 	
sl@0: 	TInt r = GetName(&aRequest, fileName);
sl@0: 	if(r != KErrNone)
sl@0: 		return(r);
sl@0: 
sl@0: 	TInt len, pos;
sl@0: 	r = GetFileAccessInfo(&aRequest, len, pos);
sl@0: 	if (r != KErrNone)
sl@0: 		return r;
sl@0: 
sl@0: 	// if length is ODD, then it can't be hex
sl@0: 	if (len & 0x01)
sl@0: 		return KErrCorrupt;
sl@0: 
sl@0: 	TInt offset = 0;
sl@0: 	while(len > 0)
sl@0: 		{
sl@0: 		TInt readLen = Min(len<<1, iHexBuf.MaxLength());
sl@0: 
sl@0: 		// read from file
sl@0: 		TPtr8 ptrHex((TUint8*) iHexBuf.Ptr(), readLen, readLen);
sl@0: 		r = FileRead(aRequest, ptrHex, pos<<1);
sl@0: 		if (r != KErrNone)
sl@0: 			return r;
sl@0: 		readLen = ptrHex.Length();
sl@0: 		if (readLen == 0)
sl@0: 			return KErrCompletion;
sl@0: 
sl@0: 		TInt binLen = readLen>>1;
sl@0: 		TPtr8 ptrBin((TUint8*) iBinBuf.Ptr(), binLen, binLen);
sl@0: 		DeHex(ptrHex, ptrBin);
sl@0: 
sl@0: 		// write back to client (may be an app or another plugin)
sl@0: 		r = ClientWrite(aRequest, ptrBin, offset);
sl@0: 		offset+= binLen;
sl@0: 		len-= binLen;
sl@0: 		pos+= readLen;
sl@0: 		}
sl@0: 	
sl@0: 	return KErrCompletion;
sl@0: 	}
sl@0: 
sl@0: 
sl@0: 
sl@0: /**
sl@0: @internalComponent
sl@0: */
sl@0: TInt CTestHexHook::HexPluginName(TDes& aName)
sl@0: 	{
sl@0: 	aName = KHexPluginName;
sl@0: 	return KErrNone;
sl@0: 	}
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: //factory functions
sl@0: 
sl@0: class CHexHookFactory : public CFsPluginFactory
sl@0: 	{
sl@0: public:
sl@0: 	CHexHookFactory();
sl@0: 	virtual TInt Install();			
sl@0: 	virtual CFsPlugin* NewPluginL();
sl@0: 	virtual CFsPlugin* NewPluginConnL();
sl@0: 	virtual TInt UniquePosition();
sl@0: 	};
sl@0: 
sl@0: /**
sl@0: Constructor for the plugin factory
sl@0: @internalComponent
sl@0: */
sl@0: CHexHookFactory::CHexHookFactory()
sl@0: 	{
sl@0: 	}
sl@0: 
sl@0: /**
sl@0: Install function for the plugin factory
sl@0: @internalComponent
sl@0: */
sl@0: TInt CHexHookFactory::Install()
sl@0: 	{
sl@0: 	iSupportedDrives = KPluginAutoAttach;
sl@0: 
sl@0: 	_LIT(KHexHookName,"HexHook");
sl@0: 	return(SetName(&KHexHookName));
sl@0: 	}
sl@0: 
sl@0: /**
sl@0: @internalComponent
sl@0: */
sl@0: TInt CHexHookFactory::UniquePosition()
sl@0: 	{
sl@0: 	return(0x4EC);
sl@0: 	}
sl@0: 
sl@0: /**
sl@0: Plugin factory function
sl@0: @internalComponent
sl@0: */
sl@0: CFsPlugin* CHexHookFactory::NewPluginL()
sl@0: 
sl@0: 	{
sl@0: 	return CTestHexHook::NewL();
sl@0: 	}
sl@0: 
sl@0: /**
sl@0: Plugin factory function
sl@0: @internalComponent
sl@0: */
sl@0: CFsPlugin* CHexHookFactory::NewPluginConnL()
sl@0: 
sl@0: 	{
sl@0: 	return CTestHexHook::NewL();
sl@0: 	}
sl@0: 
sl@0: /**
sl@0: Create a new Plugin
sl@0: @internalComponent
sl@0: */
sl@0: extern "C" {
sl@0: 
sl@0: EXPORT_C CFsPluginFactory* CreateFileSystem()
sl@0: 	{
sl@0: 	return(new CHexHookFactory());
sl@0: 	}
sl@0: }
sl@0: