convergedcallengine/csplugin/src/tcspskypeidparser.cpp
branchRCL_3
changeset 20 987c9837762f
parent 0 ff3b6d0fd310
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/convergedcallengine/csplugin/src/tcspskypeidparser.cpp	Wed Sep 01 12:15:03 2010 +0100
@@ -0,0 +1,105 @@
+/*
+* Copyright (c) 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:  Parses Skype id from UUI message.
+*
+*/
+
+
+#include "tcspskypeidparser.h"
+
+const TInt KMinSkypeIdUUILength = 3;
+const TInt KMaxSkypeIdUUILength = 33;
+const TInt KMaxSkypeIdLength = 32;
+const TInt KStartOf31To32EncodingByte = 26;
+const TInt KUUIMTDicriminator = 0x44;
+
+// ======== MEMBER FUNCTIONS ========
+
+// ---------------------------------------------------------------------------
+// Constructor
+// ---------------------------------------------------------------------------
+//
+TCSPSkypeIdParser::TCSPSkypeIdParser() 
+    {
+    }
+
+// ---------------------------------------------------------------------------
+// Creates buffer to be used by client with parse method.
+// ---------------------------------------------------------------------------
+//  
+HBufC* TCSPSkypeIdParser::CreateSkypeIdBufferL()
+    {
+    return HBufC::NewL( KMaxSkypeIdLength );
+    }
+    
+// ---------------------------------------------------------------------------
+// Parses skype id.
+// SkypeID format:
+// byte 0: Protocol discriminator: Always 0x00
+// byte 1: User-User Information Discriminator.
+//         For MT call this has to be 0x44
+// Byte 2: First skype id character a.k.a payload. MSB bit is zero.
+// Byte 26-33 May have MSB bit set, which are bits of the last character.
+// The 26 byte's MSB is the last characters MSB bit.
+// ---------------------------------------------------------------------------
+//
+TInt TCSPSkypeIdParser::Parse( 
+    const TDesC& aUUIMessage, 
+    TDes& aSkypeId )
+    {
+    const TInt messageLength( aUUIMessage.Length() );
+    TInt error = KErrNone;
+    
+    const TBool messageSizeOk = (messageLength >= KMinSkypeIdUUILength &&
+    							 messageLength <= KMaxSkypeIdUUILength);
+    							 
+    if( messageSizeOk &&
+       ( aUUIMessage[1] ) == KUUIMTDicriminator ) // address type
+        {
+        
+        TUint lastChar = 0;
+        
+        // skypeId payload starts from the second byte.
+        TInt i = 2;
+        for( ; i < messageLength; i++ )
+            {
+            TUint byte = aUUIMessage[i];
+            if( i >= KStartOf31To32EncodingByte )
+                {
+                // 31 to 32 encoding: last character is build from
+                // 7 last bytes.
+                lastChar = lastChar << 1;
+                lastChar |= (byte>>7)&0x01;
+                }
+            // MSB bit is not part of the character.
+            aSkypeId.Append( byte & 0x7F ); 
+                
+            
+            }
+            
+        // Append the last char only if the aUUIMessage size was the maximum and there
+        // is content in the last char.
+        if( messageLength == KMaxSkypeIdUUILength && lastChar != 0 )
+            {
+            aSkypeId.Append(lastChar);
+            }
+
+        }
+    else
+        {
+        error = KErrNotSupported;
+        }
+        
+    return error;
+    }