--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/crashanalysercmd/Libraries/Engine/CrashDebuggerLib/Structures/UserContextTable/UserContextTableEntry.cs	Thu Feb 11 15:50:58 2010 +0200
@@ -0,0 +1,147 @@
+/*
+* Copyright (c) 2004-2008 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: 
+*
+*/
+
+using System;
+using System.Collections.Generic;
+using System.Text;
+using SymbianStructuresLib.Arm.Registers;
+using SymbianUtils.DataBuffer;
+using SymbianUtils.DataBuffer.Entry;
+
+namespace CrashDebuggerLib.Structures.UserContextTable
+{
+    internal class UserContextTableEntry
+    {
+        #region Enumerations
+        public enum TType
+		{
+		    EUndefined,				/**< register is not available */
+		    EOffsetFromSp,			/**< iOffset is offset from stack pointer */
+		    EOffsetFromStackTop,	/**< iOffset is offset from stack top */
+		    ESpPlusOffset,			/**< value = SP + offset */
+        }
+        #endregion
+
+        #region Constructors
+        public UserContextTableEntry()
+        {
+        }
+        #endregion
+
+        #region API
+        public bool IsAvailable( bool aIsCurrentThread )
+        {
+            bool ret = false;
+            //
+            switch ( Type )
+            {
+            case TType.EOffsetFromSp:
+                // Not allowed when it's the current thread
+                ret = ( !aIsCurrentThread );
+                break;
+            case TType.EOffsetFromStackTop:
+                // Always allowed
+                ret = true;
+                break;
+            case TType.ESpPlusOffset:
+                // Not allowed when it's the current thread
+                ret = ( !aIsCurrentThread );
+                break;
+            default:
+            case TType.EUndefined:
+                break;
+            }
+            //
+            return ret;
+        }
+
+        public uint Process( ArmRegister aSp, DataBuffer aStackData )
+        {
+            uint ret = 0;
+            //
+            switch ( Type )
+            {
+            case TType.EUndefined:
+                throw new NotSupportedException();
+            case TType.EOffsetFromSp:
+                ret = UpdateUsingOffsetFromSp( aSp, aStackData );
+                break;
+            case TType.EOffsetFromStackTop:
+                ret = UpdateUsingOffsetFromStackTop( aSp, aStackData );
+                break;
+            case TType.ESpPlusOffset:
+                ret = UpdateUsingSpPlusOffset( aSp, aStackData );
+                break;
+            }
+            //
+            return ret;
+        }
+        #endregion
+
+        #region Properties
+        public TType Type
+        {
+            get { return iType; }
+            set { iType = value; }
+        }
+
+        public byte Offset
+        {
+            get { return iOffset; }
+            set { iOffset = value; }
+        }
+
+        public uint OffsetAsDWord
+        {
+            get { return (uint) Offset * 4; }
+        }
+        #endregion
+
+        #region Internal methods
+        private uint UpdateUsingOffsetFromSp( ArmRegister aSp, DataBuffer aStackData )
+        {
+            uint sp = aSp;
+            uint offset = OffsetAsDWord;
+            uint fetchAddr = offset + sp;
+            DataBufferUint val = aStackData[ fetchAddr ];
+            return val;
+        }
+
+        private uint UpdateUsingOffsetFromStackTop( ArmRegister aSp, DataBuffer aStackData )
+        {
+            uint stackTop = aStackData.Last.Address + 1;
+            uint offset = OffsetAsDWord;
+            uint fetchAddr = stackTop - offset;
+            DataBufferUint val = aStackData[ fetchAddr ];
+            return val;
+        }
+
+        private uint UpdateUsingSpPlusOffset( ArmRegister aSp, DataBuffer aStackData )
+        {
+            uint sp = aSp;
+            uint offset = OffsetAsDWord;
+            uint val = offset + sp;
+            return val;
+        }
+        #endregion
+
+        #region Data members
+        private TType iType = TType.EUndefined;
+        private byte iOffset = 0;
+        #endregion
+    }
+}