diff -r 453dfc402455 -r 0aa8cc770c8a mtpdataproviders/mtppictbridgedp/pictbridgeengine/src/dpsstate.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mtpdataproviders/mtppictbridgedp/pictbridgeengine/src/dpsstate.cpp	Tue Aug 31 16:03:15 2010 +0300
@@ -0,0 +1,235 @@
+/*
+* Copyright (c) 2006, 2007 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:  These classes implement dps states. 
+*
+*/
+
+#include <e32debug.h>
+#include "dpsstate.h"
+#include "dpsstatemachine.h"
+#include "dpstransaction.h"
+#include "dpsscriptreceiver.h"
+#include <pictbridge.h>
+ 
+#ifdef _DEBUG
+#	define IF_DEBUG(t) {RDebug::t;}
+#else
+#	define IF_DEBUG(t)
+#endif
+  
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+TDpsIdleState::TDpsIdleState(CDpsStateMachine* aStateMachine) :
+    iStateMachine(aStateMachine) {}
+    
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+void TDpsIdleState::ScriptSentNotifyL(TBool /*aReply*/)
+    {
+    IF_DEBUG(Print(_L("TDpsIdleState::ScriptSentNotify")));
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+void TDpsIdleState::ScriptReceivedNotifyL(TBool aReply)
+    {
+    if (!aReply)
+        {
+        IF_DEBUG(Print(_L("TDpsIdleState::ScriptReceived request got")));            
+        iStateMachine->Trader()->ParseScriptL(aReply);    
+        iStateMachine->SetState(iStateMachine->SendingRepState());
+        }
+    else
+        {
+        IF_DEBUG(Print(_L(
+            "TDpsIdleState::ScriptReceived should not get reply!!!")));    
+        }
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+void TDpsIdleState::Error(TInt aErr)
+    {
+    IF_DEBUG(Print(_L("TDpsIdleState::Error %d"), aErr));
+    if ((aErr != KErrCancel) && (aErr != KErrNotReady))
+        {
+        iStateMachine->Trader()->HandleHostRequestError(aErr);
+        iStateMachine->SetState(iStateMachine->SendingRepState());    
+        }
+    
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+TDpsSendingReqState::TDpsSendingReqState(CDpsStateMachine* aStateMachine) :
+    iStateMachine(aStateMachine) {}
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+void TDpsSendingReqState::ScriptSentNotifyL(TBool aReply)
+    {
+    if (!aReply)
+        {
+        IF_DEBUG(Print(_L("TDpsSendingReqState::ScriptSent request")));
+        iStateMachine->SetState(iStateMachine->WaitingRepState());
+        }
+    else
+        {
+        IF_DEBUG(Print(_L(
+            "TDpsSendingReqState::ScriptSent should not get reply!!")));
+        }
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+void TDpsSendingReqState::ScriptReceivedNotifyL(TBool /*aReply*/)
+    {
+    IF_DEBUG(Print(_L("TDpsSendingReqState::ScriptReceived")));
+    IF_DEBUG(Print(_L("**should not reply to the request/reply from host")));
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+void TDpsSendingReqState::Error(TInt aErr)
+    {
+    User::RequestComplete(iStateMachine->DpsEngine()->OperationRequest(), 
+                          aErr);
+    iStateMachine->Initialize();                          
+    return;
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+TDpsWaitingRepState::TDpsWaitingRepState(CDpsStateMachine* aStateMachine) :
+    iStateMachine(aStateMachine) {}
+
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+void TDpsWaitingRepState::ScriptSentNotifyL(TBool /*aReply*/)
+    {    
+    IF_DEBUG(Print(_L("TDpsWaitingRepState::ScriptSent")));
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+void TDpsWaitingRepState::ScriptReceivedNotifyL(TBool aReply)
+    {
+    if (aReply)
+        {
+        IF_DEBUG(Print(_L("WaitingRepState reply")))
+        
+        iStateMachine->Trader()->ParseScriptL(aReply);      
+        User::RequestComplete(
+            iStateMachine->DpsEngine()->OperationRequest(), KErrNone);        
+        iStateMachine->Initialize();        
+        }
+    else
+        {
+        IF_DEBUG(Print(_L("WaitingRepState should not get request")));
+        // collision happened, we do nothing because the host will
+        // eventually handle this by sending the correct response. but we need
+        // to subscribe for the event again.
+        iStateMachine->ScriptReceiver()->WaitForReceive();
+        }
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+void TDpsWaitingRepState::Error(TInt aErr)
+    {
+    // this is not tested
+    User::RequestComplete(iStateMachine->DpsEngine()->OperationRequest(), 
+                          aErr);
+    iStateMachine->Initialize();                          
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+TDpsSendingRepState::TDpsSendingRepState(CDpsStateMachine* aStateMachine) :
+    iStateMachine(aStateMachine) {}
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+void TDpsSendingRepState::ScriptSentNotifyL(TBool aReply)
+    {
+    if (aReply)
+        {
+        IF_DEBUG(Print(_L("TDpsSendingRepState::ScriptSent reply")));
+        if (KErrNone == iStateMachine->CurError())
+            {
+            // this is the normal situation, inform the client
+            User::RequestComplete(iStateMachine->DpsEngine()->EventRequest(), 
+                              KErrNone);    
+            }
+        else
+            {
+            // this is the error situation, do not inform the client. and
+            // we need to subscribe for the new event.
+            iStateMachine->ScriptReceiver()->WaitForReceive();
+            }
+        iStateMachine->Initialize();
+        }
+    else
+        {
+        IF_DEBUG(Print(_L(
+            "TDpsSendingRepState::ScriptSent shoul not get request!!!")));
+        }
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+void TDpsSendingRepState::ScriptReceivedNotifyL(TBool /*aReply*/)
+    {
+    IF_DEBUG(Print(_L("TDpsSendingRepState::ScriptReceived")));
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+void TDpsSendingRepState::Error(TInt /*aErr*/)
+    {
+    return;
+    }