HuffModule.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Core / CSharp / MS / Internal / Ink / InkSerializedFormat / HuffModule.cs / 1305600 / HuffModule.cs
                        

                        
                            using MS.Utility; 
using System;
using System.Runtime.InteropServices;
using System.Security;
using System.Globalization; 
using System.Windows;
using System.Windows.Input; 
using System.Windows.Ink; 
using MS.Internal.Ink.InkSerializedFormat;
using System.Collections.Generic; 


using SR = MS.Internal.PresentationCore.SR;
using SRID = MS.Internal.PresentationCore.SRID; 

namespace MS.Internal.Ink.InkSerializedFormat 
{ 
    /// 
    /// HuffModule 
    /// 
    internal class HuffModule
    {
        ///  
        /// Ctor
        ///  
        internal HuffModule() 
        {
        } 

        /// 
        /// GetDefCodec
        ///  
        internal HuffCodec GetDefCodec(uint index)
        { 
            HuffCodec huffCodec = null; 
            if (AlgoModule.DefaultBAACount > index)
            { 
                huffCodec = _defaultHuffCodecs[index];
                if (huffCodec == null)
                {
                    huffCodec = new HuffCodec(index); 
                    _defaultHuffCodecs[index] = huffCodec;
                } 
            } 
            else
            { 
                throw new ArgumentOutOfRangeException("index");
            }
            return huffCodec;
        } 

        ///  
        /// FindCodec 
        /// 
        ///  
        internal HuffCodec FindCodec(byte algoData)
        {
            byte codec = (byte)(algoData & 0x1f);
            //unused 
            //if ((0x20 & algoData) != 0)
            //{ 
            //    int iLookup = (algoData & 0x1f); 
            //    if ((iLookup > 0) && (iLookup <= _lookupList.Count))
            //    { 
            //        codec = _lookupList[iLookup - 1].Byte;
            //    }
            //}
 
            if (codec < AlgoModule.DefaultBAACount)
            { 
                return GetDefCodec((uint)codec); 
            }
 
            if ((int)codec >= _huffCodecs.Count + AlgoModule.DefaultBAACount)
            {
                throw new ArgumentException(StrokeCollectionSerializer.ISFDebugMessage("invalid codec computed"));
            } 
            return _huffCodecs[(int)(codec - AlgoModule.DefaultBAACount)];
        } 
 
        /// 
        /// FindDtXf 
        /// 
        /// 
        internal DataXform FindDtXf(byte algoData)
        { 
            //unused
            //if ((0x20 & algoData) != 0) 
            //{ 
            //    int lookupIndex = (int)(algoData & 0x1f);
            //    if ((lookupIndex > 0) && (lookupIndex < _lookupList.Count)) 
            //    {
            //        return _lookupList[lookupIndex].DeltaDelta;
            //    }
            //} 
            return this.DefaultDeltaDelta;
        } 
 
        /// 
        /// Private lazy init'd 
        /// 
        private DeltaDelta DefaultDeltaDelta
        {
            get 
            {
                if (_defaultDtxf == null) 
                { 
                    _defaultDtxf = new DeltaDelta();
                } 
                return _defaultDtxf;
            }
        }
 
        /// 
        /// Privates 
        ///  
        private DeltaDelta          _defaultDtxf;
        //unused 
        //private List    _lookupList = new List();
        private List     _huffCodecs = new List();
        private HuffCodec[]         _defaultHuffCodecs = new HuffCodec[AlgoModule.DefaultBAACount];
 
        //unused
        /////  
        ///// Simple helper class 
        ///// 
        //private class CodeLookup 
        //{
        //    internal CodeLookup(DeltaDelta dd, byte b)
        //    {
        //        if (dd == null) { throw new ArgumentNullException(); } 
        //        DeltaDelta = dd;
        //        Byte = b; 
        //    } 
        //    internal DeltaDelta DeltaDelta;
        //    internal Byte Byte; 
        //}
    }
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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