/*

* 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 System.Reflection;

using SymbianStructuresLib.Arm.Registers;

namespace CrashDebuggerLib.Structures.UserContextTable

{

    internal class UserContextTable : IEnumerable<UserContextTableEntry>

    {

        #region Enumerations

        public enum TArmRegisterIndex

        {

            EArmR0 = 0,

            EArmR1 = 1,

            EArmR2 = 2,

            EArmR3 = 3,

            EArmR4 = 4,

            EArmR5 = 5,

            EArmR6 = 6,

            EArmR7 = 7,

            EArmR8 = 8,

            EArmR9 = 9,

            EArmR10 = 10,

            EArmR11 = 11,

            EArmR12 = 12,

            EArmSp = 13,

            EArmLr = 14,

            EArmPc = 15,

            EArmFlags = 16,

            EArmDacr = 17

        }

        #endregion

        #region Constructors

        public UserContextTable( TUserContextType aType )

        {

            iType = aType;

            //

            List<UserContextTableEntry> entries = new List<UserContextTableEntry>();

            int count = EntryCount;

            for ( int i = 0; i < count; i++ )

            {

                UserContextTableEntry entry = new UserContextTableEntry();

                entries.Add( entry );

            }

            //

            iEntries = entries.ToArray();

        }

        #endregion

        #region API

        public static bool IsSupported( TArmRegisterType aType )

        {

            bool ret = false;

            //

            switch ( aType )

            {

            case TArmRegisterType.EArmReg_00:

            case TArmRegisterType.EArmReg_01:

            case TArmRegisterType.EArmReg_02:

            case TArmRegisterType.EArmReg_03:

            case TArmRegisterType.EArmReg_04:

            case TArmRegisterType.EArmReg_05:

            case TArmRegisterType.EArmReg_06:

            case TArmRegisterType.EArmReg_07:

            case TArmRegisterType.EArmReg_08:

            case TArmRegisterType.EArmReg_09:

            case TArmRegisterType.EArmReg_10:

            case TArmRegisterType.EArmReg_11:

            case TArmRegisterType.EArmReg_12:

            case TArmRegisterType.EArmReg_SP:

            case TArmRegisterType.EArmReg_LR:

            case TArmRegisterType.EArmReg_PC:

            case TArmRegisterType.EArmReg_CPSR:

            case TArmRegisterType.EArmReg_DACR:

                ret = true;

                break;

            default:

                break;

            }

            //

            return ret;

        }

        #endregion

        #region Properties

        public UserContextTableEntry this[ TArmRegisterIndex aIndex ]

        {

            get

            {

                int index = (int) aIndex;

                UserContextTableEntry ret = iEntries[ index ];

                return ret;

            }

        }

        public UserContextTableEntry this[ TArmRegisterType aReg ]

        {

            get

            {

                // Have to map to our internal type

                TArmRegisterIndex reg = Map( aReg );

                return this[ reg ];

            }

        }

        public static int EntryCount

        {

            get

            {

                Array vals = Enum.GetValues( typeof( TArmRegisterIndex ) );

                int count = vals.Length;

                return count;

            }

        }

        public TUserContextType Type

        {

            get { return iType; }

        }

        #endregion

        #region From System.Object

        public override string ToString()

        {

            StringBuilder ret = new StringBuilder();

            //

            foreach ( UserContextTableEntry entry in iEntries )

            {

                ret.AppendFormat( "[{0:x2}, {1:x2}]", (int) entry.Type, (int) entry.Offset );

            }

            //

            return ret.ToString();

        }

        #endregion

        #region Internal methods

        private static TArmRegisterIndex Map( TArmRegisterType aReg )

        {

            TArmRegisterIndex ret = TArmRegisterIndex.EArmR0;

            //

            switch ( aReg )

            {

            case TArmRegisterType.EArmReg_00:

                ret = TArmRegisterIndex.EArmR0;

                break;

            case TArmRegisterType.EArmReg_01:

                ret = TArmRegisterIndex.EArmR1;

                break;

            case TArmRegisterType.EArmReg_02:

                ret = TArmRegisterIndex.EArmR2;

                break;

            case TArmRegisterType.EArmReg_03:

                ret = TArmRegisterIndex.EArmR3;

                break;

            case TArmRegisterType.EArmReg_04:

                ret = TArmRegisterIndex.EArmR4;

                break;

            case TArmRegisterType.EArmReg_05:

                ret = TArmRegisterIndex.EArmR5;

                break;

            case TArmRegisterType.EArmReg_06:

                ret = TArmRegisterIndex.EArmR6;

                break;

            case TArmRegisterType.EArmReg_07:

                ret = TArmRegisterIndex.EArmR7;

                break;

            case TArmRegisterType.EArmReg_08:

                ret = TArmRegisterIndex.EArmR8;

                break;

            case TArmRegisterType.EArmReg_09:

                ret = TArmRegisterIndex.EArmR9;

                break;

            case TArmRegisterType.EArmReg_10:

                ret = TArmRegisterIndex.EArmR10;

                break;

            case TArmRegisterType.EArmReg_11:

                ret = TArmRegisterIndex.EArmR11;

                break;

            case TArmRegisterType.EArmReg_12:

                ret = TArmRegisterIndex.EArmR12;

                break;

            case TArmRegisterType.EArmReg_SP:

                ret = TArmRegisterIndex.EArmSp;

                break;

            case TArmRegisterType.EArmReg_LR:

                ret = TArmRegisterIndex.EArmLr;

                break;

            case TArmRegisterType.EArmReg_PC:

                ret = TArmRegisterIndex.EArmPc;

                break;

            case TArmRegisterType.EArmReg_CPSR:

                ret = TArmRegisterIndex.EArmFlags;

                break;

            case TArmRegisterType.EArmReg_DACR:

                ret = TArmRegisterIndex.EArmDacr;

                break;

            default:

                throw new NotSupportedException();

            }

            //

            return ret;

        }

        #endregion

        #region From IEnumerable<UserContextTableEntry>

        public IEnumerator<UserContextTableEntry> GetEnumerator()

        {

            foreach ( UserContextTableEntry entry in iEntries )

            {

                yield return entry;

            }

        }

        System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator()

        {

            foreach ( UserContextTableEntry entry in iEntries )

            {

                yield return entry;

            }

        }

        #endregion

        #region Data members

        private readonly TUserContextType iType;

        private readonly UserContextTableEntry[] iEntries;

        #endregion

    }

}