using System;
using System.CodeDom.Compiler;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using System.Diagnostics;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Resources;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Text;
using System.Text.RegularExpressions;
using AssetsTools.NET;
using AssetsTools.NET.Extra;
using AssetsTools.NET.Extra.Decompressors.LZ4;
using BepInEx;
using BepInEx.Configuration;
using BepInEx.Logging;
using LZ4ps;
using Microsoft.CodeAnalysis;
using Mono.Cecil;
using SevenZip;
using SevenZip.Compression.LZ;
using SevenZip.Compression.LZMA;
using SevenZip.Compression.RangeCoder;

[assembly: Guid("14898c08-8539-4585-9c6f-56c440f5440e")]
[assembly: ComVisible(false)]
[assembly: AssemblyTrademark("")]
[assembly: AssemblyCopyright("Copyright ©  2023")]
[assembly: AssemblyProduct("Tobey.UnityAudioPatcher")]
[assembly: AssemblyCompany("")]
[assembly: AssemblyConfiguration("")]
[assembly: AssemblyDescription("")]
[assembly: AssemblyTitle("Tobey.UnityAudioPatcher")]
[assembly: Debuggable(DebuggableAttribute.DebuggingModes.IgnoreSymbolStoreSequencePoints)]
[assembly: RuntimeCompatibility(WrapNonExceptionThrows = true)]
[assembly: CompilationRelaxations(8)]
[assembly: AssemblyFileVersion("2.0.3.0")]
[assembly: AssemblyVersion("2.0.3.0")]
[module: RefSafetyRules(11)]
namespace Microsoft.CodeAnalysis
{
	[CompilerGenerated]
	[Microsoft.CodeAnalysis.Embedded]
	internal sealed class EmbeddedAttribute : Attribute
	{
	}
}
namespace System.Runtime.CompilerServices
{
	[CompilerGenerated]
	[Microsoft.CodeAnalysis.Embedded]
	[AttributeUsage(AttributeTargets.Module, AllowMultiple = false, Inherited = false)]
	internal sealed class RefSafetyRulesAttribute : Attribute
	{
		public readonly int Version;

		public RefSafetyRulesAttribute(int P_0)
		{
			Version = P_0;
		}
	}
}
namespace Tobey.UnityAudio
{
	public static class Patcher
	{
		private static readonly Assembly assembly = Assembly.GetExecutingAssembly();

		private static readonly string globalGameManagersPath = Path.Combine(Directory.GetParent(Paths.ManagedPath).FullName, "globalgamemanagers");

		private static readonly ManualLogSource logger = Logger.CreateLogSource("Unity Audio Patcher");

		private static readonly ConfigFile config = new ConfigFile(Path.Combine(Paths.ConfigPath, BepinexConfigData.FileName), true);

		private static readonly ConfigEntry<bool> configPatchEnabled;

		private static readonly ConfigEntry<PatchType> configPatchType;

		private static readonly ConfigEntry<string> configAssemblySearchPaths;

		private static readonly ConfigEntry<string> configExcludedAssemblies;

		private static readonly ConfigEntry<string> configAdditionalTypeNames;

		public static IEnumerable<string> TargetDLLs { get; } = new string[0];


		private static IEnumerable<string> AssemblySearchPaths => new List<string>(configAssemblySearchPaths.Value.Split(new char[1] { ',' }))
		{
			Paths.ManagedPath,
			Paths.PluginPath
		}.Select((string path) => path.Trim()).Distinct();

		private static IEnumerable<string> ExcludedAssemblies => new List<string>(configExcludedAssemblies.Value.Split(new char[1] { ',' })).Select((string assembly) => assembly.Trim()).Distinct();

		private static IEnumerable<string> AdditionalTypeNames => (from name in configAdditionalTypeNames.Value.Split(new char[1] { ',' })
			select name.Trim()).Distinct();

		public static void Patch(AssemblyDefinition _)
		{
		}

		private static bool HasUnityAudioReferences()
		{
			string[] excludedAssemblyPrefixes = new string[2] { "Tobey.UnityAudio", "Unity" };
			return (from typeRef in (from path in AssemblySearchPaths.Where(Directory.Exists).SelectMany((string path) => Directory.GetFiles(path, "*.dll", SearchOption.AllDirectories)).Distinct()
					where excludedAssemblyPrefixes.All((string prefix) => !Path.GetFileNameWithoutExtension(path).StartsWith(prefix))
					where ExcludedAssemblies.All((string assembly) => Path.GetFileNameWithoutExtension(assembly) != Path.GetFileNameWithoutExtension(path))
					select path).SelectMany(delegate(string path)
				{
					try
					{
						return (IEnumerable<ModuleDefinition>)AssemblyDefinition.ReadAssembly(path).Modules;
					}
					catch
					{
						return (IEnumerable<ModuleDefinition>)(object)new ModuleDefinition[0];
					}
				}).SelectMany((ModuleDefinition module) => module.GetTypeReferences())
				select ((MemberReference)typeRef).FullName).Any((string typeRefName) => typeRefName.StartsWith("UnityEngine.Audio") || AdditionalTypeNames.Contains(typeRefName));
		}

		private static bool IntendedDisableAudioSetting()
		{
			//IL_0005: Unknown result type (might be due to invalid IL or missing references)
			//IL_000a: Unknown result type (might be due to invalid IL or missing references)
			//IL_000b: Unknown result type (might be due to invalid IL or missing references)
			//IL_001d: Expected I4, but got Unknown
			PatchType value = configPatchType.Value;
			return (int)value switch
			{
				1 => false, 
				2 => true, 
				0 => !HasUnityAudioReferences(), 
				_ => !HasUnityAudioReferences(), 
			};
		}

		public static void Finish()
		{
			if (configPatchEnabled.Value)
			{
				PatchGame();
			}
			else
			{
				logger.LogInfo((object)"Patcher disabled, skipping patching.");
			}
		}

		private static void PatchGame()
		{
			bool flag = IntendedDisableAudioSetting();
			logger.LogInfo((object)((flag ? "Disabling" : "Enabling") + " Unity Audio..."));
			try
			{
				using Stream stream = assembly.GetManifestResourceStream(assembly.GetManifestResourceNames().Single((string name) => name.ToLowerInvariant().EndsWith("classdata.tpk")));
				AssetsManager assetsManager = new AssetsManager();
				assetsManager.LoadClassPackage(stream);
				AssetsFileInstance assetsFileInstance = assetsManager.LoadAssetsFile(globalGameManagersPath, loadDeps: true);
				assetsManager.LoadClassDatabaseFromPackage(assetsFileInstance.file.Metadata.UnityVersion);
				AssetFileInfo assetInfo = assetsFileInstance.file.GetAssetInfo(4L);
				AssetTypeValueField baseField = assetsManager.GetBaseField(assetsFileInstance, assetInfo);
				AssetTypeValueField assetTypeValueField = baseField["m_DisableAudio"];
				if (assetTypeValueField.AsBool == flag)
				{
					logger.LogInfo((object)("Unity Audio is already " + (flag ? "disabled" : "enabled") + ", skipping patching."));
					return;
				}
				assetTypeValueField.AsBool = flag;
				string text = globalGameManagersPath + ".tmp";
				using (AssetsFileWriter writer = new AssetsFileWriter(text))
				{
					assetsFileInstance.file.Write(writer, 0L, new List<AssetsReplacer>(1)
					{
						new AssetsReplacerFromMemory(assetsFileInstance.file, assetInfo, baseField)
					});
				}
				assetsFileInstance.file.Close();
				assetsManager.UnloadAll();
				File.Delete(globalGameManagersPath);
				File.Move(text, globalGameManagersPath);
				logger.LogMessage((object)("Unity Audio successfully " + (flag ? "disabled" : "enabled") + "."));
			}
			catch (Exception ex)
			{
				logger.LogWarning((object)"An exception was thrown during patching!");
				logger.LogError((object)ex);
			}
		}

		static Patcher()
		{
			//IL_0052: Unknown result type (might be due to invalid IL or missing references)
			//IL_005c: Expected O, but got Unknown
			//IL_0096: Unknown result type (might be due to invalid IL or missing references)
			//IL_00c0: Unknown result type (might be due to invalid IL or missing references)
			//IL_00c6: Expected O, but got Unknown
			//IL_00f0: Unknown result type (might be due to invalid IL or missing references)
			//IL_00f6: Expected O, but got Unknown
			//IL_0120: Unknown result type (might be due to invalid IL or missing references)
			//IL_0126: Expected O, but got Unknown
			ConfigFile obj = config;
			string name = Patching.Name;
			string name2 = Enabled.Name;
			string description = Enabled.Description;
			configPatchEnabled = obj.Bind<bool>(name, name2, Enabled.DefaultValue, description);
			ConfigFile obj2 = config;
			string name3 = Patching.Name;
			string name4 = PatchType.Name;
			description = PatchType.Description;
			configPatchType = obj2.Bind<PatchType>(name3, name4, PatchType.DefaultValue, description);
			ConfigFile obj3 = config;
			string name5 = Patching.Name;
			string name6 = AdditionalAssemblySearchPaths.Name;
			ConfigDescription val = new ConfigDescription(AdditionalAssemblySearchPaths.Description, (AcceptableValueBase)null, AdditionalAssemblySearchPaths.Tags);
			configAssemblySearchPaths = obj3.Bind<string>(name5, name6, AdditionalAssemblySearchPaths.DefaultValue, val);
			ConfigFile obj4 = config;
			string name7 = Patching.Name;
			string name8 = ExcludedAssemblies.Name;
			val = new ConfigDescription(ExcludedAssemblies.Description, (AcceptableValueBase)null, ExcludedAssemblies.Tags);
			configExcludedAssemblies = obj4.Bind<string>(name7, name8, ExcludedAssemblies.DefaultValue, val);
			ConfigFile obj5 = config;
			string name9 = Patching.Name;
			string name10 = AdditionalUnityAudioTypeNames.Name;
			val = new ConfigDescription(AdditionalUnityAudioTypeNames.Description, (AcceptableValueBase)null, AdditionalUnityAudioTypeNames.Tags);
			configAdditionalTypeNames = obj5.Bind<string>(name9, name10, AdditionalUnityAudioTypeNames.DefaultValue, val);
		}
	}
}
namespace Tobey.UnityAudio.Properties
{
	[GeneratedCode("System.Resources.Tools.StronglyTypedResourceBuilder", "17.0.0.0")]
	[CompilerGenerated]
	[DebuggerNonUserCode]
	internal class Resources
	{
		private static ResourceManager resourceMan;

		private static CultureInfo resourceCulture;

		[EditorBrowsable(EditorBrowsableState.Advanced)]
		internal static ResourceManager ResourceManager
		{
			get
			{
				if (resourceMan == null)
				{
					resourceMan = new ResourceManager("Tobey.UnityAudio.Properties.Resources", typeof(Resources).Assembly);
				}
				return resourceMan;
			}
		}

		[EditorBrowsable(EditorBrowsableState.Advanced)]
		internal static CultureInfo Culture
		{
			get
			{
				return resourceCulture;
			}
			set
			{
				resourceCulture = value;
			}
		}

		internal static byte[] classdata => (byte[])ResourceManager.GetObject("classdata", resourceCulture);

		internal Resources()
		{
		}
	}
}
namespace SevenZip
{
	internal class CRC
	{
		public static readonly uint[] Table;

		private uint _value = uint.MaxValue;

		static CRC()
		{
			Table = new uint[256];
			for (uint num = 0u; num < 256; num++)
			{
				uint num2 = num;
				for (int i = 0; i < 8; i++)
				{
					num2 = (((num2 & 1) == 0) ? (num2 >> 1) : ((num2 >> 1) ^ 0xEDB88320u));
				}
				Table[num] = num2;
			}
		}

		public void Init()
		{
			_value = uint.MaxValue;
		}

		public void UpdateByte(byte b)
		{
			_value = Table[(byte)_value ^ b] ^ (_value >> 8);
		}

		public void Update(byte[] data, uint offset, uint size)
		{
			for (uint num = 0u; num < size; num++)
			{
				_value = Table[(byte)_value ^ data[offset + num]] ^ (_value >> 8);
			}
		}

		public uint GetDigest()
		{
			return _value ^ 0xFFFFFFFFu;
		}

		private static uint CalculateDigest(byte[] data, uint offset, uint size)
		{
			CRC cRC = new CRC();
			cRC.Update(data, offset, size);
			return cRC.GetDigest();
		}

		private static bool VerifyDigest(uint digest, byte[] data, uint offset, uint size)
		{
			return CalculateDigest(data, offset, size) == digest;
		}
	}
	internal class DataErrorException : ApplicationException
	{
		public DataErrorException()
			: base("Data Error")
		{
		}
	}
	internal class InvalidParamException : ApplicationException
	{
		public InvalidParamException()
			: base("Invalid Parameter")
		{
		}
	}
	public interface ICodeProgress
	{
		void SetProgress(long inSize, long outSize);
	}
	public interface ICoder
	{
		void Code(Stream inStream, Stream outStream, long inSize, long outSize, ICodeProgress progress);
	}
	public enum CoderPropID
	{
		DefaultProp,
		DictionarySize,
		UsedMemorySize,
		Order,
		BlockSize,
		PosStateBits,
		LitContextBits,
		LitPosBits,
		NumFastBytes,
		MatchFinder,
		MatchFinderCycles,
		NumPasses,
		Algorithm,
		NumThreads,
		EndMarker
	}
	public interface ISetCoderProperties
	{
		void SetCoderProperties(CoderPropID[] propIDs, object[] properties);
	}
	public interface IWriteCoderProperties
	{
		void WriteCoderProperties(Stream outStream);
	}
	public interface ISetDecoderProperties
	{
		void SetDecoderProperties(byte[] properties);
	}
}
namespace SevenZip.Compression.RangeCoder
{
	internal class Encoder
	{
		public const uint kTopValue = 16777216u;

		private Stream Stream;

		public ulong Low;

		public uint Range;

		private uint _cacheSize;

		private byte _cache;

		private long StartPosition;

		public void SetStream(Stream stream)
		{
			Stream = stream;
		}

		public void ReleaseStream()
		{
			Stream = null;
		}

		public void Init()
		{
			StartPosition = Stream.Position;
			Low = 0uL;
			Range = uint.MaxValue;
			_cacheSize = 1u;
			_cache = 0;
		}

		public void FlushData()
		{
			for (int i = 0; i < 5; i++)
			{
				ShiftLow();
			}
		}

		public void FlushStream()
		{
			Stream.Flush();
		}

		public void CloseStream()
		{
			Stream.Close();
		}

		public void Encode(uint start, uint size, uint total)
		{
			Low += start * (Range /= total);
			Range *= size;
			while (Range < 16777216)
			{
				Range <<= 8;
				ShiftLow();
			}
		}

		public void ShiftLow()
		{
			if ((uint)Low < 4278190080u || (int)(Low >> 32) == 1)
			{
				byte b = _cache;
				do
				{
					Stream.WriteByte((byte)(b + (Low >> 32)));
					b = byte.MaxValue;
				}
				while (--_cacheSize != 0);
				_cache = (byte)((uint)Low >> 24);
			}
			_cacheSize++;
			Low = (uint)((int)Low << 8);
		}

		public void EncodeDirectBits(uint v, int numTotalBits)
		{
			for (int num = numTotalBits - 1; num >= 0; num--)
			{
				Range >>= 1;
				if (((v >> num) & 1) == 1)
				{
					Low += Range;
				}
				if (Range < 16777216)
				{
					Range <<= 8;
					ShiftLow();
				}
			}
		}

		public void EncodeBit(uint size0, int numTotalBits, uint symbol)
		{
			uint num = (Range >> numTotalBits) * size0;
			if (symbol == 0)
			{
				Range = num;
			}
			else
			{
				Low += num;
				Range -= num;
			}
			while (Range < 16777216)
			{
				Range <<= 8;
				ShiftLow();
			}
		}

		public long GetProcessedSizeAdd()
		{
			return _cacheSize + Stream.Position - StartPosition + 4;
		}
	}
	internal class Decoder
	{
		public const uint kTopValue = 16777216u;

		public uint Range;

		public uint Code;

		public Stream Stream;

		public void Init(Stream stream)
		{
			Stream = stream;
			Code = 0u;
			Range = uint.MaxValue;
			for (int i = 0; i < 5; i++)
			{
				Code = (Code << 8) | (byte)Stream.ReadByte();
			}
		}

		public void ReleaseStream()
		{
			Stream = null;
		}

		public void CloseStream()
		{
			Stream.Close();
		}

		public void Normalize()
		{
			while (Range < 16777216)
			{
				Code = (Code << 8) | (byte)Stream.ReadByte();
				Range <<= 8;
			}
		}

		public void Normalize2()
		{
			if (Range < 16777216)
			{
				Code = (Code << 8) | (byte)Stream.ReadByte();
				Range <<= 8;
			}
		}

		public uint GetThreshold(uint total)
		{
			return Code / (Range /= total);
		}

		public void Decode(uint start, uint size, uint total)
		{
			Code -= start * Range;
			Range *= size;
			Normalize();
		}

		public uint DecodeDirectBits(int numTotalBits)
		{
			uint num = Range;
			uint num2 = Code;
			uint num3 = 0u;
			for (int num4 = numTotalBits; num4 > 0; num4--)
			{
				num >>= 1;
				uint num5 = num2 - num >> 31;
				num2 -= num & (num5 - 1);
				num3 = (num3 << 1) | (1 - num5);
				if (num < 16777216)
				{
					num2 = (num2 << 8) | (byte)Stream.ReadByte();
					num <<= 8;
				}
			}
			Range = num;
			Code = num2;
			return num3;
		}

		public uint DecodeBit(uint size0, int numTotalBits)
		{
			uint num = (Range >> numTotalBits) * size0;
			uint result;
			if (Code < num)
			{
				result = 0u;
				Range = num;
			}
			else
			{
				result = 1u;
				Code -= num;
				Range -= num;
			}
			Normalize();
			return result;
		}
	}
	internal struct BitEncoder
	{
		public const int kNumBitModelTotalBits = 11;

		public const uint kBitModelTotal = 2048u;

		private const int kNumMoveBits = 5;

		private const int kNumMoveReducingBits = 2;

		public const int kNumBitPriceShiftBits = 6;

		private uint Prob;

		private static uint[] ProbPrices;

		public void Init()
		{
			Prob = 1024u;
		}

		public void UpdateModel(uint symbol)
		{
			if (symbol == 0)
			{
				Prob += 2048 - Prob >> 5;
			}
			else
			{
				Prob -= Prob >> 5;
			}
		}

		public void Encode(Encoder encoder, uint symbol)
		{
			uint num = (encoder.Range >> 11) * Prob;
			if (symbol == 0)
			{
				encoder.Range = num;
				Prob += 2048 - Prob >> 5;
			}
			else
			{
				encoder.Low += num;
				encoder.Range -= num;
				Prob -= Prob >> 5;
			}
			if (encoder.Range < 16777216)
			{
				encoder.Range <<= 8;
				encoder.ShiftLow();
			}
		}

		static BitEncoder()
		{
			ProbPrices = new uint[512];
			for (int num = 8; num >= 0; num--)
			{
				int num2 = 1 << 9 - num - 1;
				uint num3 = (uint)(1 << 9 - num);
				for (uint num4 = (uint)num2; num4 < num3; num4++)
				{
					ProbPrices[num4] = (uint)(num << 6) + (num3 - num4 << 6 >> 9 - num - 1);
				}
			}
		}

		public uint GetPrice(uint symbol)
		{
			return ProbPrices[(((Prob - symbol) ^ (int)(0 - symbol)) & 0x7FF) >> 2];
		}

		public uint GetPrice0()
		{
			return ProbPrices[Prob >> 2];
		}

		public uint GetPrice1()
		{
			return ProbPrices[2048 - Prob >> 2];
		}
	}
	internal struct BitDecoder
	{
		public const int kNumBitModelTotalBits = 11;

		public const uint kBitModelTotal = 2048u;

		private const int kNumMoveBits = 5;

		private uint Prob;

		public void UpdateModel(int numMoveBits, uint symbol)
		{
			if (symbol == 0)
			{
				Prob += 2048 - Prob >> numMoveBits;
			}
			else
			{
				Prob -= Prob >> numMoveBits;
			}
		}

		public void Init()
		{
			Prob = 1024u;
		}

		public uint Decode(Decoder rangeDecoder)
		{
			uint num = (rangeDecoder.Range >> 11) * Prob;
			if (rangeDecoder.Code < num)
			{
				rangeDecoder.Range = num;
				Prob += 2048 - Prob >> 5;
				if (rangeDecoder.Range < 16777216)
				{
					rangeDecoder.Code = (rangeDecoder.Code << 8) | (byte)rangeDecoder.Stream.ReadByte();
					rangeDecoder.Range <<= 8;
				}
				return 0u;
			}
			rangeDecoder.Range -= num;
			rangeDecoder.Code -= num;
			Prob -= Prob >> 5;
			if (rangeDecoder.Range < 16777216)
			{
				rangeDecoder.Code = (rangeDecoder.Code << 8) | (byte)rangeDecoder.Stream.ReadByte();
				rangeDecoder.Range <<= 8;
			}
			return 1u;
		}
	}
	internal struct BitTreeEncoder
	{
		private BitEncoder[] Models;

		private int NumBitLevels;

		public BitTreeEncoder(int numBitLevels)
		{
			NumBitLevels = numBitLevels;
			Models = new BitEncoder[1 << numBitLevels];
		}

		public void Init()
		{
			for (uint num = 1u; num < 1 << NumBitLevels; num++)
			{
				Models[num].Init();
			}
		}

		public void Encode(Encoder rangeEncoder, uint symbol)
		{
			uint num = 1u;
			int num2 = NumBitLevels;
			while (num2 > 0)
			{
				num2--;
				uint num3 = (symbol >> num2) & 1u;
				Models[num].Encode(rangeEncoder, num3);
				num = (num << 1) | num3;
			}
		}

		public void ReverseEncode(Encoder rangeEncoder, uint symbol)
		{
			uint num = 1u;
			for (uint num2 = 0u; num2 < NumBitLevels; num2++)
			{
				uint num3 = symbol & 1u;
				Models[num].Encode(rangeEncoder, num3);
				num = (num << 1) | num3;
				symbol >>= 1;
			}
		}

		public uint GetPrice(uint symbol)
		{
			uint num = 0u;
			uint num2 = 1u;
			int num3 = NumBitLevels;
			while (num3 > 0)
			{
				num3--;
				uint num4 = (symbol >> num3) & 1u;
				num += Models[num2].GetPrice(num4);
				num2 = (num2 << 1) + num4;
			}
			return num;
		}

		public uint ReverseGetPrice(uint symbol)
		{
			uint num = 0u;
			uint num2 = 1u;
			for (int num3 = NumBitLevels; num3 > 0; num3--)
			{
				uint num4 = symbol & 1u;
				symbol >>= 1;
				num += Models[num2].GetPrice(num4);
				num2 = (num2 << 1) | num4;
			}
			return num;
		}

		public static uint ReverseGetPrice(BitEncoder[] Models, uint startIndex, int NumBitLevels, uint symbol)
		{
			uint num = 0u;
			uint num2 = 1u;
			for (int num3 = NumBitLevels; num3 > 0; num3--)
			{
				uint num4 = symbol & 1u;
				symbol >>= 1;
				num += Models[startIndex + num2].GetPrice(num4);
				num2 = (num2 << 1) | num4;
			}
			return num;
		}

		public static void ReverseEncode(BitEncoder[] Models, uint startIndex, Encoder rangeEncoder, int NumBitLevels, uint symbol)
		{
			uint num = 1u;
			for (int i = 0; i < NumBitLevels; i++)
			{
				uint num2 = symbol & 1u;
				Models[startIndex + num].Encode(rangeEncoder, num2);
				num = (num << 1) | num2;
				symbol >>= 1;
			}
		}
	}
	internal struct BitTreeDecoder
	{
		private BitDecoder[] Models;

		private int NumBitLevels;

		public BitTreeDecoder(int numBitLevels)
		{
			NumBitLevels = numBitLevels;
			Models = new BitDecoder[1 << numBitLevels];
		}

		public void Init()
		{
			for (uint num = 1u; num < 1 << NumBitLevels; num++)
			{
				Models[num].Init();
			}
		}

		public uint Decode(Decoder rangeDecoder)
		{
			uint num = 1u;
			for (int num2 = NumBitLevels; num2 > 0; num2--)
			{
				num = (num << 1) + Models[num].Decode(rangeDecoder);
			}
			return num - (uint)(1 << NumBitLevels);
		}

		public uint ReverseDecode(Decoder rangeDecoder)
		{
			uint num = 1u;
			uint num2 = 0u;
			for (int i = 0; i < NumBitLevels; i++)
			{
				uint num3 = Models[num].Decode(rangeDecoder);
				num <<= 1;
				num += num3;
				num2 |= num3 << i;
			}
			return num2;
		}

		public static uint ReverseDecode(BitDecoder[] Models, uint startIndex, Decoder rangeDecoder, int NumBitLevels)
		{
			uint num = 1u;
			uint num2 = 0u;
			for (int i = 0; i < NumBitLevels; i++)
			{
				uint num3 = Models[startIndex + num].Decode(rangeDecoder);
				num <<= 1;
				num += num3;
				num2 |= num3 << i;
			}
			return num2;
		}
	}
}
namespace SevenZip.Compression.LZ
{
	internal interface IInWindowStream
	{
		void SetStream(Stream inStream);

		void Init();

		void ReleaseStream();

		byte GetIndexByte(int index);

		uint GetMatchLen(int index, uint distance, uint limit);

		uint GetNumAvailableBytes();
	}
	internal interface IMatchFinder : IInWindowStream
	{
		void Create(uint historySize, uint keepAddBufferBefore, uint matchMaxLen, uint keepAddBufferAfter);

		uint GetMatches(uint[] distances);

		void Skip(uint num);
	}
	public class BinTree : InWindow, IMatchFinder, IInWindowStream
	{
		private uint _cyclicBufferPos;

		private uint _cyclicBufferSize;

		private uint _matchMaxLen;

		private uint[] _son;

		private uint[] _hash;

		private uint _cutValue = 255u;

		private uint _hashMask;

		private uint _hashSizeSum;

		private bool HASH_ARRAY = true;

		private const uint kHash2Size = 1024u;

		private const uint kHash3Size = 65536u;

		private const uint kBT2HashSize = 65536u;

		private const uint kStartMaxLen = 1u;

		private const uint kHash3Offset = 1024u;

		private const uint kEmptyHashValue = 0u;

		private const uint kMaxValForNormalize = 2147483647u;

		private uint kNumHashDirectBytes;

		private uint kMinMatchCheck = 4u;

		private uint kFixHashSize = 66560u;

		public void SetType(int numHashBytes)
		{
			HASH_ARRAY = numHashBytes > 2;
			if (HASH_ARRAY)
			{
				kNumHashDirectBytes = 0u;
				kMinMatchCheck = 4u;
				kFixHashSize = 66560u;
			}
			else
			{
				kNumHashDirectBytes = 2u;
				kMinMatchCheck = 3u;
				kFixHashSize = 0u;
			}
		}

		public new void SetStream(Stream stream)
		{
			base.SetStream(stream);
		}

		public new void ReleaseStream()
		{
			base.ReleaseStream();
		}

		public new void Init()
		{
			base.Init();
			for (uint num = 0u; num < _hashSizeSum; num++)
			{
				_hash[num] = 0u;
			}
			_cyclicBufferPos = 0u;
			ReduceOffsets(-1);
		}

		public new void MovePos()
		{
			if (++_cyclicBufferPos >= _cyclicBufferSize)
			{
				_cyclicBufferPos = 0u;
			}
			base.MovePos();
			if (_pos == int.MaxValue)
			{
				Normalize();
			}
		}

		public new byte GetIndexByte(int index)
		{
			return base.GetIndexByte(index);
		}

		public new uint GetMatchLen(int index, uint distance, uint limit)
		{
			return base.GetMatchLen(index, distance, limit);
		}

		public new uint GetNumAvailableBytes()
		{
			return base.GetNumAvailableBytes();
		}

		public void Create(uint historySize, uint keepAddBufferBefore, uint matchMaxLen, uint keepAddBufferAfter)
		{
			if (historySize > 2147483391)
			{
				throw new Exception();
			}
			_cutValue = 16 + (matchMaxLen >> 1);
			uint keepSizeReserv = (historySize + keepAddBufferBefore + matchMaxLen + keepAddBufferAfter) / 2 + 256;
			Create(historySize + keepAddBufferBefore, matchMaxLen + keepAddBufferAfter, keepSizeReserv);
			_matchMaxLen = matchMaxLen;
			uint num = historySize + 1;
			if (_cyclicBufferSize != num)
			{
				_son = new uint[(_cyclicBufferSize = num) * 2];
			}
			uint num2 = 65536u;
			if (HASH_ARRAY)
			{
				num2 = historySize - 1;
				num2 |= num2 >> 1;
				num2 |= num2 >> 2;
				num2 |= num2 >> 4;
				num2 |= num2 >> 8;
				num2 >>= 1;
				num2 |= 0xFFFFu;
				if (num2 > 16777216)
				{
					num2 >>= 1;
				}
				_hashMask = num2;
				num2++;
				num2 += kFixHashSize;
			}
			if (num2 != _hashSizeSum)
			{
				_hash = new uint[_hashSizeSum = num2];
			}
		}

		public uint GetMatches(uint[] distances)
		{
			uint num;
			if (_pos + _matchMaxLen <= _streamPos)
			{
				num = _matchMaxLen;
			}
			else
			{
				num = _streamPos - _pos;
				if (num < kMinMatchCheck)
				{
					MovePos();
					return 0u;
				}
			}
			uint num2 = 0u;
			uint num3 = ((_pos > _cyclicBufferSize) ? (_pos - _cyclicBufferSize) : 0u);
			uint num4 = _bufferOffset + _pos;
			uint num5 = 1u;
			uint num6 = 0u;
			uint num7 = 0u;
			uint num10;
			if (HASH_ARRAY)
			{
				uint num8 = CRC.Table[_bufferBase[num4]] ^ _bufferBase[num4 + 1];
				num6 = num8 & 0x3FFu;
				int num9 = (int)num8 ^ (_bufferBase[num4 + 2] << 8);
				num7 = (uint)num9 & 0xFFFFu;
				num10 = ((uint)num9 ^ (CRC.Table[_bufferBase[num4 + 3]] << 5)) & _hashMask;
			}
			else
			{
				num10 = (uint)(_bufferBase[num4] ^ (_bufferBase[num4 + 1] << 8));
			}
			uint num11 = _hash[kFixHashSize + num10];
			if (HASH_ARRAY)
			{
				uint num12 = _hash[num6];
				uint num13 = _hash[1024 + num7];
				_hash[num6] = _pos;
				_hash[1024 + num7] = _pos;
				if (num12 > num3 && _bufferBase[_bufferOffset + num12] == _bufferBase[num4])
				{
					num5 = (distances[num2++] = 2u);
					distances[num2++] = _pos - num12 - 1;
				}
				if (num13 > num3 && _bufferBase[_bufferOffset + num13] == _bufferBase[num4])
				{
					if (num13 == num12)
					{
						num2 -= 2;
					}
					num5 = (distances[num2++] = 3u);
					distances[num2++] = _pos - num13 - 1;
					num12 = num13;
				}
				if (num2 != 0 && num12 == num11)
				{
					num2 -= 2;
					num5 = 1u;
				}
			}
			_hash[kFixHashSize + num10] = _pos;
			uint num14 = (_cyclicBufferPos << 1) + 1;
			uint num15 = _cyclicBufferPos << 1;
			uint val;
			uint val2 = (val = kNumHashDirectBytes);
			if (kNumHashDirectBytes != 0 && num11 > num3 && _bufferBase[_bufferOffset + num11 + kNumHashDirectBytes] != _bufferBase[num4 + kNumHashDirectBytes])
			{
				num5 = (distances[num2++] = kNumHashDirectBytes);
				distances[num2++] = _pos - num11 - 1;
			}
			uint cutValue = _cutValue;
			while (true)
			{
				if (num11 <= num3 || cutValue-- == 0)
				{
					_son[num14] = (_son[num15] = 0u);
					break;
				}
				uint num16 = _pos - num11;
				uint num17 = ((num16 <= _cyclicBufferPos) ? (_cyclicBufferPos - num16) : (_cyclicBufferPos - num16 + _cyclicBufferSize)) << 1;
				uint num18 = _bufferOffset + num11;
				uint num19 = Math.Min(val2, val);
				if (_bufferBase[num18 + num19] == _bufferBase[num4 + num19])
				{
					while (++num19 != num && _bufferBase[num18 + num19] == _bufferBase[num4 + num19])
					{
					}
					if (num5 < num19)
					{
						num5 = (distances[num2++] = num19);
						distances[num2++] = num16 - 1;
						if (num19 == num)
						{
							_son[num15] = _son[num17];
							_son[num14] = _son[num17 + 1];
							break;
						}
					}
				}
				if (_bufferBase[num18 + num19] < _bufferBase[num4 + num19])
				{
					_son[num15] = num11;
					num15 = num17 + 1;
					num11 = _son[num15];
					val = num19;
				}
				else
				{
					_son[num14] = num11;
					num14 = num17;
					num11 = _son[num14];
					val2 = num19;
				}
			}
			MovePos();
			return num2;
		}

		public void Skip(uint num)
		{
			do
			{
				uint num2;
				if (_pos + _matchMaxLen <= _streamPos)
				{
					num2 = _matchMaxLen;
				}
				else
				{
					num2 = _streamPos - _pos;
					if (num2 < kMinMatchCheck)
					{
						MovePos();
						continue;
					}
				}
				uint num3 = ((_pos > _cyclicBufferSize) ? (_pos - _cyclicBufferSize) : 0u);
				uint num4 = _bufferOffset + _pos;
				uint num9;
				if (HASH_ARRAY)
				{
					uint num5 = CRC.Table[_bufferBase[num4]] ^ _bufferBase[num4 + 1];
					uint num6 = num5 & 0x3FFu;
					_hash[num6] = _pos;
					int num7 = (int)num5 ^ (_bufferBase[num4 + 2] << 8);
					uint num8 = (uint)num7 & 0xFFFFu;
					_hash[1024 + num8] = _pos;
					num9 = ((uint)num7 ^ (CRC.Table[_bufferBase[num4 + 3]] << 5)) & _hashMask;
				}
				else
				{
					num9 = (uint)(_bufferBase[num4] ^ (_bufferBase[num4 + 1] << 8));
				}
				uint num10 = _hash[kFixHashSize + num9];
				_hash[kFixHashSize + num9] = _pos;
				uint num11 = (_cyclicBufferPos << 1) + 1;
				uint num12 = _cyclicBufferPos << 1;
				uint val;
				uint val2 = (val = kNumHashDirectBytes);
				uint cutValue = _cutValue;
				while (true)
				{
					if (num10 <= num3 || cutValue-- == 0)
					{
						_son[num11] = (_son[num12] = 0u);
						break;
					}
					uint num13 = _pos - num10;
					uint num14 = ((num13 <= _cyclicBufferPos) ? (_cyclicBufferPos - num13) : (_cyclicBufferPos - num13 + _cyclicBufferSize)) << 1;
					uint num15 = _bufferOffset + num10;
					uint num16 = Math.Min(val2, val);
					if (_bufferBase[num15 + num16] == _bufferBase[num4 + num16])
					{
						while (++num16 != num2 && _bufferBase[num15 + num16] == _bufferBase[num4 + num16])
						{
						}
						if (num16 == num2)
						{
							_son[num12] = _son[num14];
							_son[num11] = _son[num14 + 1];
							break;
						}
					}
					if (_bufferBase[num15 + num16] < _bufferBase[num4 + num16])
					{
						_son[num12] = num10;
						num12 = num14 + 1;
						num10 = _son[num12];
						val = num16;
					}
					else
					{
						_son[num11] = num10;
						num11 = num14;
						num10 = _son[num11];
						val2 = num16;
					}
				}
				MovePos();
			}
			while (--num != 0);
		}

		private void NormalizeLinks(uint[] items, uint numItems, uint subValue)
		{
			for (uint num = 0u; num < numItems; num++)
			{
				uint num2 = items[num];
				num2 = ((num2 > subValue) ? (num2 - subValue) : 0u);
				items[num] = num2;
			}
		}

		private void Normalize()
		{
			uint subValue = _pos - _cyclicBufferSize;
			NormalizeLinks(_son, _cyclicBufferSize * 2, subValue);
			NormalizeLinks(_hash, _hashSizeSum, subValue);
			ReduceOffsets((int)subValue);
		}

		public void SetCutValue(uint cutValue)
		{
			_cutValue = cutValue;
		}
	}
	public class InWindow
	{
		public byte[] _bufferBase;

		private Stream _stream;

		private uint _posLimit;

		private bool _streamEndWasReached;

		private uint _pointerToLastSafePosition;

		public uint _bufferOffset;

		public uint _blockSize;

		public uint _pos;

		private uint _keepSizeBefore;

		private uint _keepSizeAfter;

		public uint _streamPos;

		public void MoveBlock()
		{
			uint num = _bufferOffset + _pos - _keepSizeBefore;
			if (num != 0)
			{
				num--;
			}
			uint num2 = _bufferOffset + _streamPos - num;
			for (uint num3 = 0u; num3 < num2; num3++)
			{
				_bufferBase[num3] = _bufferBase[num + num3];
			}
			_bufferOffset -= num;
		}

		public virtual void ReadBlock()
		{
			if (_streamEndWasReached)
			{
				return;
			}
			while (true)
			{
				int num = (int)(0 - _bufferOffset + _blockSize - _streamPos);
				if (num == 0)
				{
					return;
				}
				int num2 = _stream.Read(_bufferBase, (int)(_bufferOffset + _streamPos), num);
				if (num2 == 0)
				{
					break;
				}
				_streamPos += (uint)num2;
				if (_streamPos >= _pos + _keepSizeAfter)
				{
					_posLimit = _streamPos - _keepSizeAfter;
				}
			}
			_posLimit = _streamPos;
			if (_bufferOffset + _posLimit > _pointerToLastSafePosition)
			{
				_posLimit = _pointerToLastSafePosition - _bufferOffset;
			}
			_streamEndWasReached = true;
		}

		private void Free()
		{
			_bufferBase = null;
		}

		public void Create(uint keepSizeBefore, uint keepSizeAfter, uint keepSizeReserv)
		{
			_keepSizeBefore = keepSizeBefore;
			_keepSizeAfter = keepSizeAfter;
			uint num = keepSizeBefore + keepSizeAfter + keepSizeReserv;
			if (_bufferBase == null || _blockSize != num)
			{
				Free();
				_blockSize = num;
				_bufferBase = new byte[_blockSize];
			}
			_pointerToLastSafePosition = _blockSize - keepSizeAfter;
		}

		public void SetStream(Stream stream)
		{
			_stream = stream;
		}

		public void ReleaseStream()
		{
			_stream = null;
		}

		public void Init()
		{
			_bufferOffset = 0u;
			_pos = 0u;
			_streamPos = 0u;
			_streamEndWasReached = false;
			ReadBlock();
		}

		public void MovePos()
		{
			_pos++;
			if (_pos > _posLimit)
			{
				if (_bufferOffset + _pos > _pointerToLastSafePosition)
				{
					MoveBlock();
				}
				ReadBlock();
			}
		}

		public byte GetIndexByte(int index)
		{
			return _bufferBase[_bufferOffset + _pos + index];
		}

		public uint GetMatchLen(int index, uint distance, uint limit)
		{
			if (_streamEndWasReached && _pos + index + limit > _streamPos)
			{
				limit = _streamPos - (uint)(int)(_pos + index);
			}
			distance++;
			uint num = _bufferOffset + _pos + (uint)index;
			uint num2;
			for (num2 = 0u; num2 < limit && _bufferBase[num + num2] == _bufferBase[num + num2 - distance]; num2++)
			{
			}
			return num2;
		}

		public uint GetNumAvailableBytes()
		{
			return _streamPos - _pos;
		}

		public void ReduceOffsets(int subValue)
		{
			_bufferOffset += (uint)subValue;
			_posLimit -= (uint)subValue;
			_pos -= (uint)subValue;
			_streamPos -= (uint)subValue;
		}
	}
	public class OutWindow
	{
		private byte[] _buffer;

		private uint _pos;

		private uint _windowSize;

		private uint _streamPos;

		private Stream _stream;

		public uint TrainSize;

		public void Create(uint windowSize)
		{
			if (_windowSize != windowSize)
			{
				_buffer = new byte[windowSize];
			}
			_windowSize = windowSize;
			_pos = 0u;
			_streamPos = 0u;
		}

		public void Init(Stream stream, bool solid)
		{
			ReleaseStream();
			_stream = stream;
			if (!solid)
			{
				_streamPos = 0u;
				_pos = 0u;
				TrainSize = 0u;
			}
		}

		public bool Train(Stream stream)
		{
			long length = stream.Length;
			uint num = (TrainSize = (uint)((length < _windowSize) ? length : _windowSize));
			stream.Position = length - num;
			_streamPos = (_pos = 0u);
			while (num != 0)
			{
				uint num2 = _windowSize - _pos;
				if (num < num2)
				{
					num2 = num;
				}
				int num3 = stream.Read(_buffer, (int)_pos, (int)num2);
				if (num3 == 0)
				{
					return false;
				}
				num -= (uint)num3;
				_pos += (uint)num3;
				_streamPos += (uint)num3;
				if (_pos == _windowSize)
				{
					_streamPos = (_pos = 0u);
				}
			}
			return true;
		}

		public void ReleaseStream()
		{
			Flush();
			_stream = null;
		}

		public void Flush()
		{
			uint num = _pos - _streamPos;
			if (num != 0)
			{
				_stream.Write(_buffer, (int)_streamPos, (int)num);
				if (_pos >= _windowSize)
				{
					_pos = 0u;
				}
				_streamPos = _pos;
			}
		}

		public void CopyBlock(uint distance, uint len)
		{
			uint num = _pos - distance - 1;
			if (num >= _windowSize)
			{
				num += _windowSize;
			}
			while (len != 0)
			{
				if (num >= _windowSize)
				{
					num = 0u;
				}
				_buffer[_pos++] = _buffer[num++];
				if (_pos >= _windowSize)
				{
					Flush();
				}
				len--;
			}
		}

		public void PutByte(byte b)
		{
			_buffer[_pos++] = b;
			if (_pos >= _windowSize)
			{
				Flush();
			}
		}

		public byte GetByte(uint distance)
		{
			uint num = _pos - distance - 1;
			if (num >= _windowSize)
			{
				num += _windowSize;
			}
			return _buffer[num];
		}
	}
}
namespace SevenZip.Compression.LZMA
{
	internal abstract class Base
	{
		public struct State
		{
			public uint Index;

			public void Init()
			{
				Index = 0u;
			}

			public void UpdateChar()
			{
				if (Index < 4)
				{
					Index = 0u;
				}
				else if (Index < 10)
				{
					Index -= 3u;
				}
				else
				{
					Index -= 6u;
				}
			}

			public void UpdateMatch()
			{
				Index = ((Index < 7) ? 7u : 10u);
			}

			public void UpdateRep()
			{
				Index = ((Index < 7) ? 8u : 11u);
			}

			public void UpdateShortRep()
			{
				Index = ((Index < 7) ? 9u : 11u);
			}

			public bool IsCharState()
			{
				return Index < 7;
			}
		}

		public const uint kNumRepDistances = 4u;

		public const uint kNumStates = 12u;

		public const int kNumPosSlotBits = 6;

		public const int kDicLogSizeMin = 0;

		public const int kNumLenToPosStatesBits = 2;

		public const uint kNumLenToPosStates = 4u;

		public const uint kMatchMinLen = 2u;

		public const int kNumAlignBits = 4;

		public const uint kAlignTableSize = 16u;

		public const uint kAlignMask = 15u;

		public const uint kStartPosModelIndex = 4u;

		public const uint kEndPosModelIndex = 14u;

		public const uint kNumPosModels = 10u;

		public const uint kNumFullDistances = 128u;

		public const uint kNumLitPosStatesBitsEncodingMax = 4u;

		public const uint kNumLitContextBitsMax = 8u;

		public const int kNumPosStatesBitsMax = 4;

		public const uint kNumPosStatesMax = 16u;

		public const int kNumPosStatesBitsEncodingMax = 4;

		public const uint kNumPosStatesEncodingMax = 16u;

		public const int kNumLowLenBits = 3;

		public const int kNumMidLenBits = 3;

		public const int kNumHighLenBits = 8;

		public const uint kNumLowLenSymbols = 8u;

		public const uint kNumMidLenSymbols = 8u;

		public const uint kNumLenSymbols = 272u;

		public const uint kMatchMaxLen = 273u;

		public static uint GetLenToPosState(uint len)
		{
			len -= 2;
			if (len < 4)
			{
				return len;
			}
			return 3u;
		}
	}
	public class Decoder : ICoder, ISetDecoderProperties
	{
		private class LenDecoder
		{
			private BitDecoder m_Choice;

			private BitDecoder m_Choice2;

			private BitTreeDecoder[] m_LowCoder = new BitTreeDecoder[16];

			private BitTreeDecoder[] m_MidCoder = new BitTreeDecoder[16];

			private BitTreeDecoder m_HighCoder = new BitTreeDecoder(8);

			private uint m_NumPosStates;

			public void Create(uint numPosStates)
			{
				for (uint num = m_NumPosStates; num < numPosStates; num++)
				{
					m_LowCoder[num] = new BitTreeDecoder(3);
					m_MidCoder[num] = new BitTreeDecoder(3);
				}
				m_NumPosStates = numPosStates;
			}

			public void Init()
			{
				m_Choice.Init();
				for (uint num = 0u; num < m_NumPosStates; num++)
				{
					m_LowCoder[num].Init();
					m_MidCoder[num].Init();
				}
				m_Choice2.Init();
				m_HighCoder.Init();
			}

			public uint Decode(SevenZip.Compression.RangeCoder.Decoder rangeDecoder, uint posState)
			{
				if (m_Choice.Decode(rangeDecoder) == 0)
				{
					return m_LowCoder[posState].Decode(rangeDecoder);
				}
				uint num = 8u;
				if (m_Choice2.Decode(rangeDecoder) == 0)
				{
					return num + m_MidCoder[posState].Decode(rangeDecoder);
				}
				num += 8;
				return num + m_HighCoder.Decode(rangeDecoder);
			}
		}

		private class LiteralDecoder
		{
			private struct Decoder2
			{
				private BitDecoder[] m_Decoders;

				public void Create()
				{
					m_Decoders = new BitDecoder[768];
				}

				public void Init()
				{
					for (int i = 0; i < 768; i++)
					{
						m_Decoders[i].Init();
					}
				}

				public byte DecodeNormal(SevenZip.Compression.RangeCoder.Decoder rangeDecoder)
				{
					uint num = 1u;
					do
					{
						num = (num << 1) | m_Decoders[num].Decode(rangeDecoder);
					}
					while (num < 256);
					return (byte)num;
				}

				public byte DecodeWithMatchByte(SevenZip.Compression.RangeCoder.Decoder rangeDecoder, byte matchByte)
				{
					uint num = 1u;
					do
					{
						uint num2 = (uint)(matchByte >> 7) & 1u;
						matchByte <<= 1;
						uint num3 = m_Decoders[(1 + num2 << 8) + num].Decode(rangeDecoder);
						num = (num << 1) | num3;
						if (num2 != num3)
						{
							while (num < 256)
							{
								num = (num << 1) | m_Decoders[num].Decode(rangeDecoder);
							}
							break;
						}
					}
					while (num < 256);
					return (byte)num;
				}
			}

			private Decoder2[] m_Coders;

			private int m_NumPrevBits;

			private int m_NumPosBits;

			private uint m_PosMask;

			public void Create(int numPosBits, int numPrevBits)
			{
				if (m_Coders == null || m_NumPrevBits != numPrevBits || m_NumPosBits != numPosBits)
				{
					m_NumPosBits = numPosBits;
					m_PosMask = (uint)((1 << numPosBits) - 1);
					m_NumPrevBits = numPrevBits;
					uint num = (uint)(1 << m_NumPrevBits + m_NumPosBits);
					m_Coders = new Decoder2[num];
					for (uint num2 = 0u; num2 < num; num2++)
					{
						m_Coders[num2].Create();
					}
				}
			}

			public void Init()
			{
				uint num = (uint)(1 << m_NumPrevBits + m_NumPosBits);
				for (uint num2 = 0u; num2 < num; num2++)
				{
					m_Coders[num2].Init();
				}
			}

			private uint GetState(uint pos, byte prevByte)
			{
				return ((pos & m_PosMask) << m_NumPrevBits) + (uint)(prevByte >> 8 - m_NumPrevBits);
			}

			public byte DecodeNormal(SevenZip.Compression.RangeCoder.Decoder rangeDecoder, uint pos, byte prevByte)
			{
				return m_Coders[GetState(pos, prevByte)].DecodeNormal(rangeDecoder);
			}

			public byte DecodeWithMatchByte(SevenZip.Compression.RangeCoder.Decoder rangeDecoder, uint pos, byte prevByte, byte matchByte)
			{
				return m_Coders[GetState(pos, prevByte)].DecodeWithMatchByte(rangeDecoder, matchByte);
			}
		}

		private OutWindow m_OutWindow = new OutWindow();

		private SevenZip.Compression.RangeCoder.Decoder m_RangeDecoder = new SevenZip.Compression.RangeCoder.Decoder();

		private BitDecoder[] m_IsMatchDecoders = new BitDecoder[192];

		private BitDecoder[] m_IsRepDecoders = new BitDecoder[12];

		private BitDecoder[] m_IsRepG0Decoders = new BitDecoder[12];

		private BitDecoder[] m_IsRepG1Decoders = new BitDecoder[12];

		private BitDecoder[] m_IsRepG2Decoders = new BitDecoder[12];

		private BitDecoder[] m_IsRep0LongDecoders = new BitDecoder[192];

		private BitTreeDecoder[] m_PosSlotDecoder = new BitTreeDecoder[4];

		private BitDecoder[] m_PosDecoders = new BitDecoder[114];

		private BitTreeDecoder m_PosAlignDecoder = new BitTreeDecoder(4);

		private LenDecoder m_LenDecoder = new LenDecoder();

		private LenDecoder m_RepLenDecoder = new LenDecoder();

		private LiteralDecoder m_LiteralDecoder = new LiteralDecoder();

		private uint m_DictionarySize;

		private uint m_DictionarySizeCheck;

		private uint m_PosStateMask;

		private bool _solid;

		public Decoder()
		{
			m_DictionarySize = uint.MaxValue;
			for (int i = 0; (long)i < 4L; i++)
			{
				m_PosSlotDecoder[i] = new BitTreeDecoder(6);
			}
		}

		private void SetDictionarySize(uint dictionarySize)
		{
			if (m_DictionarySize != dictionarySize)
			{
				m_DictionarySize = dictionarySize;
				m_DictionarySizeCheck = Math.Max(m_DictionarySize, 1u);
				uint windowSize = Math.Max(m_DictionarySizeCheck, 4096u);
				m_OutWindow.Create(windowSize);
			}
		}

		private void SetLiteralProperties(int lp, int lc)
		{
			if (lp > 8)
			{
				throw new InvalidParamException();
			}
			if (lc > 8)
			{
				throw new InvalidParamException();
			}
			m_LiteralDecoder.Create(lp, lc);
		}

		private void SetPosBitsProperties(int pb)
		{
			if (pb > 4)
			{
				throw new InvalidParamException();
			}
			uint num = (uint)(1 << pb);
			m_LenDecoder.Create(num);
			m_RepLenDecoder.Create(num);
			m_PosStateMask = num - 1;
		}

		private void Init(Stream inStream, Stream outStream)
		{
			m_RangeDecoder.Init(inStream);
			m_OutWindow.Init(outStream, _solid);
			for (uint num = 0u; num < 12; num++)
			{
				for (uint num2 = 0u; num2 <= m_PosStateMask; num2++)
				{
					uint num3 = (num << 4) + num2;
					m_IsMatchDecoders[num3].Init();
					m_IsRep0LongDecoders[num3].Init();
				}
				m_IsRepDecoders[num].Init();
				m_IsRepG0Decoders[num].Init();
				m_IsRepG1Decoders[num].Init();
				m_IsRepG2Decoders[num].Init();
			}
			m_LiteralDecoder.Init();
			for (uint num = 0u; num < 4; num++)
			{
				m_PosSlotDecoder[num].Init();
			}
			for (uint num = 0u; num < 114; num++)
			{
				m_PosDecoders[num].Init();
			}
			m_LenDecoder.Init();
			m_RepLenDecoder.Init();
			m_PosAlignDecoder.Init();
		}

		public void Code(Stream inStream, Stream outStream, long inSize, long outSize, ICodeProgress progress)
		{
			Init(inStream, outStream);
			Base.State state = default(Base.State);
			state.Init();
			uint num = 0u;
			uint num2 = 0u;
			uint num3 = 0u;
			uint num4 = 0u;
			ulong num5 = 0uL;
			if (num5 < (ulong)outSize)
			{
				if (m_IsMatchDecoders[state.Index << 4].Decode(m_RangeDecoder) != 0)
				{
					throw new DataErrorException();
				}
				state.UpdateChar();
				byte b = m_LiteralDecoder.DecodeNormal(m_RangeDecoder, 0u, 0);
				m_OutWindow.PutByte(b);
				num5++;
			}
			while (num5 < (ulong)outSize)
			{
				uint num6 = (uint)(int)num5 & m_PosStateMask;
				if (m_IsMatchDecoders[(state.Index << 4) + num6].Decode(m_RangeDecoder) == 0)
				{
					byte @byte = m_OutWindow.GetByte(0u);
					byte b2 = (state.IsCharState() ? m_LiteralDecoder.DecodeNormal(m_RangeDecoder, (uint)num5, @byte) : m_LiteralDecoder.DecodeWithMatchByte(m_RangeDecoder, (uint)num5, @byte, m_OutWindow.GetByte(num)));
					m_OutWindow.PutByte(b2);
					state.UpdateChar();
					num5++;
					continue;
				}
				uint num8;
				if (m_IsRepDecoders[state.Index].Decode(m_RangeDecoder) == 1)
				{
					if (m_IsRepG0Decoders[state.Index].Decode(m_RangeDecoder) == 0)
					{
						if (m_IsRep0LongDecoders[(state.Index << 4) + num6].Decode(m_RangeDecoder) == 0)
						{
							state.UpdateShortRep();
							m_OutWindow.PutByte(m_OutWindow.GetByte(num));
							num5++;
							continue;
						}
					}
					else
					{
						uint num7;
						if (m_IsRepG1Decoders[state.Index].Decode(m_RangeDecoder) == 0)
						{
							num7 = num2;
						}
						else
						{
							if (m_IsRepG2Decoders[state.Index].Decode(m_RangeDecoder) == 0)
							{
								num7 = num3;
							}
							else
							{
								num7 = num4;
								num4 = num3;
							}
							num3 = num2;
						}
						num2 = num;
						num = num7;
					}
					num8 = m_RepLenDecoder.Decode(m_RangeDecoder, num6) + 2;
					state.UpdateRep();
				}
				else
				{
					num4 = num3;
					num3 = num2;
					num2 = num;
					num8 = 2 + m_LenDecoder.Decode(m_RangeDecoder, num6);
					state.UpdateMatch();
					uint num9 = m_PosSlotDecoder[Base.GetLenToPosState(num8)].Decode(m_RangeDecoder);
					if (num9 >= 4)
					{
						int num10 = (int)((num9 >> 1) - 1);
						num = (2 | (num9 & 1)) << num10;
						if (num9 < 14)
						{
							num += BitTreeDecoder.ReverseDecode(m_PosDecoders, num - num9 - 1, m_RangeDecoder, num10);
						}
						else
						{
							num += m_RangeDecoder.DecodeDirectBits(num10 - 4) << 4;
							num += m_PosAlignDecoder.ReverseDecode(m_RangeDecoder);
						}
					}
					else
					{
						num = num9;
					}
				}
				if (num >= m_OutWindow.TrainSize + num5 || num >= m_DictionarySizeCheck)
				{
					if (num == uint.MaxValue)
					{
						break;
					}
					throw new DataErrorException();
				}
				m_OutWindow.CopyBlock(num, num8);
				num5 += num8;
			}
			m_OutWindow.Flush();
			m_OutWindow.ReleaseStream();
			m_RangeDecoder.ReleaseStream();
		}

		public void SetDecoderProperties(byte[] properties)
		{
			if (properties.Length < 5)
			{
				throw new InvalidParamException();
			}
			int lc = properties[0] % 9;
			int num = properties[0] / 9;
			int lp = num % 5;
			int num2 = num / 5;
			if (num2 > 4)
			{
				throw new InvalidParamException();
			}
			uint num3 = 0u;
			for (int i = 0; i < 4; i++)
			{
				num3 += (uint)(properties[1 + i] << i * 8);
			}
			SetDictionarySize(num3);
			SetLiteralProperties(lp, lc);
			SetPosBitsProperties(num2);
		}

		public bool Train(Stream stream)
		{
			_solid = true;
			return m_OutWindow.Train(stream);
		}
	}
	public class Encoder : ICoder, ISetCoderProperties, IWriteCoderProperties
	{
		private enum EMatchFinderType
		{
			BT2,
			BT4
		}

		private class LiteralEncoder
		{
			public struct Encoder2
			{
				private BitEncoder[] m_Encoders;

				public void Create()
				{
					m_Encoders = new BitEncoder[768];
				}

				public void Init()
				{
					for (int i = 0; i < 768; i++)
					{
						m_Encoders[i].Init();
					}
				}

				public void Encode(SevenZip.Compression.RangeCoder.Encoder rangeEncoder, byte symbol)
				{
					uint num = 1u;
					for (int num2 = 7; num2 >= 0; num2--)
					{
						uint num3 = (uint)(symbol >> num2) & 1u;
						m_Encoders[num].Encode(rangeEncoder, num3);
						num = (num << 1) | num3;
					}
				}

				public void EncodeMatched(SevenZip.Compression.RangeCoder.Encoder rangeEncoder, byte matchByte, byte symbol)
				{
					uint num = 1u;
					bool flag = true;
					for (int num2 = 7; num2 >= 0; num2--)
					{
						uint num3 = (uint)(symbol >> num2) & 1u;
						uint num4 = num;
						if (flag)
						{
							uint num5 = (uint)(matchByte >> num2) & 1u;
							num4 += 1 + num5 << 8;
							flag = num5 == num3;
						}
						m_Encoders[num4].Encode(rangeEncoder, num3);
						num = (num << 1) | num3;
					}
				}

				public uint GetPrice(bool matchMode, byte matchByte, byte symbol)
				{
					uint num = 0u;
					uint num2 = 1u;
					int num3 = 7;
					if (matchMode)
					{
						while (num3 >= 0)
						{
							uint num4 = (uint)(matchByte >> num3) & 1u;
							uint num5 = (uint)(symbol >> num3) & 1u;
							num += m_Encoders[(1 + num4 << 8) + num2].GetPrice(num5);
							num2 = (num2 << 1) | num5;
							if (num4 != num5)
							{
								num3--;
								break;
							}
							num3--;
						}
					}
					while (num3 >= 0)
					{
						uint num6 = (uint)(symbol >> num3) & 1u;
						num += m_Encoders[num2].GetPrice(num6);
						num2 = (num2 << 1) | num6;
						num3--;
					}
					return num;
				}
			}

			private Encoder2[] m_Coders;

			private int m_NumPrevBits;

			private int m_NumPosBits;

			private uint m_PosMask;

			public void Create(int numPosBits, int numPrevBits)
			{
				if (m_Coders == null || m_NumPrevBits != numPrevBits || m_NumPosBits != numPosBits)
				{
					m_NumPosBits = numPosBits;
					m_PosMask = (uint)((1 << numPosBits) - 1);
					m_NumPrevBits = numPrevBits;
					uint num = (uint)(1 << m_NumPrevBits + m_NumPosBits);
					m_Coders = new Encoder2[num];
					for (uint num2 = 0u; num2 < num; num2++)
					{
						m_Coders[num2].Create();
					}
				}
			}

			public void Init()
			{
				uint num = (uint)(1 << m_NumPrevBits + m_NumPosBits);
				for (uint num2 = 0u; num2 < num; num2++)
				{
					m_Coders[num2].Init();
				}
			}

			public Encoder2 GetSubCoder(uint pos, byte prevByte)
			{
				return m_Coders[(int)((pos & m_PosMask) << m_NumPrevBits) + (prevByte >> 8 - m_NumPrevBits)];
			}
		}

		private class LenEncoder
		{
			private BitEncoder _choice;

			private BitEncoder _choice2;

			private BitTreeEncoder[] _lowCoder = new BitTreeEncoder[16];

			private BitTreeEncoder[] _midCoder = new BitTreeEncoder[16];

			private BitTreeEncoder _highCoder = new BitTreeEncoder(8);

			public LenEncoder()
			{
				for (uint num = 0u; num < 16; num++)
				{
					_lowCoder[num] = new BitTreeEncoder(3);
					_midCoder[num] = new BitTreeEncoder(3);
				}
			}

			public void Init(uint numPosStates)
			{
				_choice.Init();
				_choice2.Init();
				for (uint num = 0u; num < numPosStates; num++)
				{
					_lowCoder[num].Init();
					_midCoder[num].Init();
				}
				_highCoder.Init();
			}

			public void Encode(SevenZip.Compression.RangeCoder.Encoder rangeEncoder, uint symbol, uint posState)
			{
				if (symbol < 8)
				{
					_choice.Encode(rangeEncoder, 0u);
					_lowCoder[posState].Encode(rangeEncoder, symbol);
					return;
				}
				symbol -= 8;
				_choice.Encode(rangeEncoder, 1u);
				if (symbol < 8)
				{
					_choice2.Encode(rangeEncoder, 0u);
					_midCoder[posState].Encode(rangeEncoder, symbol);
				}
				else
				{
					_choice2.Encode(rangeEncoder, 1u);
					_highCoder.Encode(rangeEncoder, symbol - 8);
				}
			}

			public void SetPrices(uint posState, uint numSymbols, uint[] prices, uint st)
			{
				uint price = _choice.GetPrice0();
				uint price2 = _choice.GetPrice1();
				uint num = price2 + _choice2.GetPrice0();
				uint num2 = price2 + _choice2.GetPrice1();
				uint num3 = 0u;
				for (num3 = 0u; num3 < 8; num3++)
				{
					if (num3 >= numSymbols)
					{
						return;
					}
					prices[st + num3] = price + _lowCoder[posState].GetPrice(num3);
				}
				for (; num3 < 16; num3++)
				{
					if (num3 >= numSymbols)
					{
						return;
					}
					prices[st + num3] = num + _midCoder[posState].GetPrice(num3 - 8);
				}
				for (; num3 < numSymbols; num3++)
				{
					prices[st + num3] = num2 + _highCoder.GetPrice(num3 - 8 - 8);
				}
			}
		}

		private class LenPriceTableEncoder : LenEncoder
		{
			private uint[] _prices = new uint[4352];

			private uint _tableSize;

			private uint[] _counters = new uint[16];

			public void SetTableSize(uint tableSize)
			{
				_tableSize = tableSize;
			}

			public uint GetPrice(uint symbol, uint posState)
			{
				return _prices[posState * 272 + symbol];
			}

			private void UpdateTable(uint posState)
			{
				SetPrices(posState, _tableSize, _prices, posState * 272);
				_counters[posState] = _tableSize;
			}

			public void UpdateTables(uint numPosStates)
			{
				for (uint num = 0u; num < numPosStates; num++)
				{
					UpdateTable(num);
				}
			}

			public new void Encode(SevenZip.Compression.RangeCoder.Encoder rangeEncoder, uint symbol, uint posState)
			{
				base.Encode(rangeEncoder, symbol, posState);
				if (--_counters[posState] == 0)
				{
					UpdateTable(posState);
				}
			}
		}

		private class Optimal
		{
			public Base.State State;

			public bool Prev1IsChar;

			public bool Prev2;

			public uint PosPrev2;

			public uint BackPrev2;

			public uint Price;

			public uint PosPrev;

			public uint BackPrev;

			public uint Backs0;

			public uint Backs1;

			public uint Backs2;

			public uint Backs3;

			public void MakeAsChar()
			{
				BackPrev = uint.MaxValue;
				Prev1IsChar = false;
			}

			public void MakeAsShortRep()
			{
				BackPrev = 0u;
				Prev1IsChar = false;
			}

			public bool IsShortRep()
			{
				return BackPrev == 0;
			}
		}

		private const uint kIfinityPrice = 268435455u;

		private static byte[] g_FastPos;

		private Base.State _state;

		private byte _previousByte;

		private uint[] _repDistances = new uint[4];

		private const int kDefaultDictionaryLogSize = 22;

		private const uint kNumFastBytesDefault = 32u;

		private const uint kNumLenSpecSymbols = 16u;

		private const uint kNumOpts = 4096u;

		private Optimal[] _optimum = new Optimal[4096];

		private IMatchFinder _matchFinder;

		private SevenZip.Compression.RangeCoder.Encoder _rangeEncoder = new SevenZip.Compression.RangeCoder.Encoder();

		private BitEncoder[] _isMatch = new BitEncoder[192];

		private BitEncoder[] _isRep = new BitEncoder[12];

		private BitEncoder[] _isRepG0 = new BitEncoder[12];

		private BitEncoder[] _isRepG1 = new BitEncoder[12];

		private BitEncoder[] _isRepG2 = new BitEncoder[12];

		private BitEncoder[] _isRep0Long = new BitEncoder[192];

		private BitTreeEncoder[] _posSlotEncoder = new BitTreeEncoder[4];

		private BitEncoder[] _posEncoders = new BitEncoder[114];

		private BitTreeEncoder _posAlignEncoder = new BitTreeEncoder(4);

		private LenPriceTableEncoder _lenEncoder = new LenPriceTableEncoder();

		private LenPriceTableEncoder _repMatchLenEncoder = new LenPriceTableEncoder();

		private LiteralEncoder _literalEncoder = new LiteralEncoder();

		private uint[] _matchDistances = new uint[548];

		private uint _numFastBytes = 32u;

		private uint _longestMatchLength;

		private uint _numDistancePairs;

		private uint _additionalOffset;

		private uint _optimumEndIndex;

		private uint _optimumCurrentIndex;

		private bool _longestMatchWasFound;

		private uint[] _posSlotPrices = new uint[256];

		private uint[] _distancesPrices = new uint[512];

		private uint[] _alignPrices = new uint[16];

		private uint _alignPriceCount;

		private uint _distTableSize = 44u;

		private int _posStateBits = 2;

		private uint _posStateMask = 3u;

		private int _numLiteralPosStateBits;

		private int _numLiteralContextBits = 3;

		private uint _dictionarySize = 4194304u;

		private uint _dictionarySizePrev = uint.MaxValue;

		private uint _numFastBytesPrev = uint.MaxValue;

		private long nowPos64;

		private bool _finished;

		private Stream _inStream;

		private EMatchFinderType _matchFinderType = EMatchFinderType.BT4;

		private bool _writeEndMark;

		private bool _needReleaseMFStream;

		private uint[] reps = new uint[4];

		private uint[] repLens = new uint[4];

		private const int kPropSize = 5;

		private byte[] properties = new byte[5];

		private uint[] tempPrices = new uint[128];

		private uint _matchPriceCount;

		private static string[] kMatchFinderIDs;

		private uint _trainSize;

		static Encoder()
		{
			g_FastPos = new byte[2048];
			kMatchFinderIDs = new string[2] { "BT2", "BT4" };
			int num = 2;
			g_FastPos[0] = 0;
			g_FastPos[1] = 1;
			for (byte b = 2; b < 22; b++)
			{
				uint num2 = (uint)(1 << (b >> 1) - 1);
				uint num3 = 0u;
				while (num3 < num2)
				{
					g_FastPos[num] = b;
					num3++;
					num++;
				}
			}
		}

		private static uint GetPosSlot(uint pos)
		{
			if (pos < 2048)
			{
				return g_FastPos[pos];
			}
			if (pos < 2097152)
			{
				return (uint)(g_FastPos[pos >> 10] + 20);
			}
			return (uint)(g_FastPos[pos >> 20] + 40);
		}

		private static uint GetPosSlot2(uint pos)
		{
			if (pos < 131072)
			{
				return (uint)(g_FastPos[pos >> 6] + 12);
			}
			if (pos < 134217728)
			{
				return (uint)(g_FastPos[pos >> 16] + 32);
			}
			return (uint)(g_FastPos[pos >> 26] + 52);
		}

		private void BaseInit()
		{
			_state.Init();
			_previousByte = 0;
			for (uint num = 0u; num < 4; num++)
			{
				_repDistances[num] = 0u;
			}
		}

		private void Create()
		{
			if (_matchFinder == null)
			{
				BinTree binTree = new BinTree();
				int type = 4;
				if (_matchFinderType == EMatchFinderType.BT2)
				{
					type = 2;
				}
				binTree.SetType(type);
				_matchFinder = binTree;
			}
			_literalEncoder.Create(_numLiteralPosStateBits, _numLiteralContextBits);
			if (_dictionarySize != _dictionarySizePrev || _numFastBytesPrev != _numFastBytes)
			{
				_matchFinder.Create(_dictionarySize, 4096u, _numFastBytes, 274u);
				_dictionarySizePrev = _dictionarySize;
				_numFastBytesPrev = _numFastBytes;
			}
		}

		public Encoder()
		{
			for (int i = 0; (long)i < 4096L; i++)
			{
				_optimum[i] = new Optimal();
			}
			for (int j = 0; (long)j < 4L; j++)
			{
				_posSlotEncoder[j] = new BitTreeEncoder(6);
			}
		}

		private void SetWriteEndMarkerMode(bool writeEndMarker)
		{
			_writeEndMark = writeEndMarker;
		}

		private void Init()
		{
			BaseInit();
			_rangeEncoder.Init();
			for (uint num = 0u; num < 12; num++)
			{
				for (uint num2 = 0u; num2 <= _posStateMask; num2++)
				{
					uint num3 = (num << 4) + num2;
					_isMatch[num3].Init();
					_isRep0Long[num3].Init();
				}
				_isRep[num].Init();
				_isRepG0[num].Init();
				_isRepG1[num].Init();
				_isRepG2[num].Init();
			}
			_literalEncoder.Init();
			for (uint num = 0u; num < 4; num++)
			{
				_posSlotEncoder[num].Init();
			}
			for (uint num = 0u; num < 114; num++)
			{
				_posEncoders[num].Init();
			}
			_lenEncoder.Init((uint)(1 << _posStateBits));
			_repMatchLenEncoder.Init((uint)(1 << _posStateBits));
			_posAlignEncoder.Init();
			_longestMatchWasFound = false;
			_optimumEndIndex = 0u;
			_optimumCurrentIndex = 0u;
			_additionalOffset = 0u;
		}

		private void ReadMatchDistances(out uint lenRes, out uint numDistancePairs)
		{
			lenRes = 0u;
			numDistancePairs = _matchFinder.GetMatches(_matchDistances);
			if (numDistancePairs != 0)
			{
				lenRes = _matchDistances[numDistancePairs - 2];
				if (lenRes == _numFastBytes)
				{
					lenRes += _matchFinder.GetMatchLen((int)(lenRes - 1), _matchDistances[numDistancePairs - 1], 273 - lenRes);
				}
			}
			_additionalOffset++;
		}

		private void MovePos(uint num)
		{
			if (num != 0)
			{
				_matchFinder.Skip(num);
				_additionalOffset += num;
			}
		}

		private uint GetRepLen1Price(Base.State state, uint posState)
		{
			return _isRepG0[state.Index].GetPrice0() + _isRep0Long[(state.Index << 4) + posState].GetPrice0();
		}

		private uint GetPureRepPrice(uint repIndex, Base.State state, uint posState)
		{
			uint price;
			if (repIndex == 0)
			{
				price = _isRepG0[state.Index].GetPrice0();
				return price + _isRep0Long[(state.Index << 4) + posState].GetPrice1();
			}
			price = _isRepG0[state.Index].GetPrice1();
			if (repIndex == 1)
			{
				return price + _isRepG1[state.Index].GetPrice0();
			}
			price += _isRepG1[state.Index].GetPrice1();
			return price + _isRepG2[state.Index].GetPrice(repIndex - 2);
		}

		private uint GetRepPrice(uint repIndex, uint len, Base.State state, uint posState)
		{
			return _repMatchLenEncoder.GetPrice(len - 2, posState) + GetPureRepPrice(repIndex, state, posState);
		}

		private uint GetPosLenPrice(uint pos, uint len, uint posState)
		{
			uint lenToPosState = Base.GetLenToPosState(len);
			uint num = ((pos >= 128) ? (_posSlotPrices[(lenToPosState << 6) + GetPosSlot2(pos)] + _alignPrices[pos & 0xF]) : _distancesPrices[lenToPosState * 128 + pos]);
			return num + _lenEncoder.GetPrice(len - 2, posState);
		}

		private uint Backward(out uint backRes, uint cur)
		{
			_optimumEndIndex = cur;
			uint posPrev = _optimum[cur].PosPrev;
			uint backPrev = _optimum[cur].BackPrev;
			do
			{
				if (_optimum[cur].Prev1IsChar)
				{
					_optimum[posPrev].MakeAsChar();
					_optimum[posPrev].PosPrev = posPrev - 1;
					if (_optimum[cur].Prev2)
					{
						_optimum[posPrev - 1].Prev1IsChar = false;
						_optimum[posPrev - 1].PosPrev = _optimum[cur].PosPrev2;
						_optimum[posPrev - 1].BackPrev = _optimum[cur].BackPrev2;
					}
				}
				uint num = posPrev;
				uint backPrev2 = backPrev;
				backPrev = _optimum[num].BackPrev;
				posPrev = _optimum[num].PosPrev;
				_optimum[num].BackPrev = backPrev2;
				_optimum[num].PosPrev = cur;
				cur = num;
			}
			while (cur != 0);
			backRes = _optimum[0].BackPrev;
			_optimumCurrentIndex = _optimum[0].PosPrev;
			return _optimumCurrentIndex;
		}

		private uint GetOptimum(uint position, out uint backRes)
		{
			if (_optimumEndIndex != _optimumCurrentIndex)
			{
				uint result = _optimum[_optimumCurrentIndex].PosPrev - _optimumCurrentIndex;
				backRes = _optimum[_optimumCurrentIndex].BackPrev;
				_optimumCurrentIndex = _optimum[_optimumCurrentIndex].PosPrev;
				return result;
			}
			_optimumCurrentIndex = (_optimumEndIndex = 0u);
			uint lenRes;
			uint numDistancePairs;
			if (!_longestMatchWasFound)
			{
				ReadMatchDistances(out lenRes, out numDistancePairs);
			}
			else
			{
				lenRes = _longestMatchLength;
				numDistancePairs = _numDistancePairs;
				_longestMatchWasFound = false;
			}
			uint num = _matchFinder.GetNumAvailableBytes() + 1;
			if (num < 2)
			{
				backRes = uint.MaxValue;
				return 1u;
			}
			if (num > 273)
			{
				num = 273u;
			}
			uint num2 = 0u;
			for (uint num3 = 0u; num3 < 4; num3++)
			{
				reps[num3] = _repDistances[num3];
				repLens[num3] = _matchFinder.GetMatchLen(-1, reps[num3], 273u);
				if (repLens[num3] > repLens[num2])
				{
					num2 = num3;
				}
			}
			if (repLens[num2] >= _numFastBytes)
			{
				backRes = num2;
				uint num4 = repLens[num2];
				MovePos(num4 - 1);
				return num4;
			}
			if (lenRes >= _numFastBytes)
			{
				backRes = _matchDistances[numDistancePairs - 1] + 4;
				MovePos(lenRes - 1);
				return lenRes;
			}
			byte indexByte = _matchFinder.GetIndexByte(-1);
			byte indexByte2 = _matchFinder.GetIndexByte((int)(0 - _repDistances[0] - 1 - 1));
			if (lenRes < 2 && indexByte != indexByte2 && repLens[num2] < 2)
			{
				backRes = uint.MaxValue;
				return 1u;
			}
			_optimum[0].State = _state;
			uint num5 = position & _posStateMask;
			_optimum[1].Price = _isMatch[(_state.Index << 4) + num5].GetPrice0() + _literalEncoder.GetSubCoder(position, _previousByte).GetPrice(!_state.IsCharState(), indexByte2, indexByte);
			_optimum[1].MakeAsChar();
			uint price = _isMatch[(_state.Index << 4) + num5].GetPrice1();
			uint num6 = price + _isRep[_state.Index].GetPrice1();
			if (indexByte2 == indexByte)
			{
				uint num7 = num6 + GetRepLen1Price(_state, num5);
				if (num7 < _optimum[1].Price)
				{
					_optimum[1].Price = num7;
					_optimum[1].MakeAsShortRep();
				}
			}
			uint num8 = ((lenRes >= repLens[num2]) ? lenRes : repLens[num2]);
			if (num8 < 2)
			{
				backRes = _optimum[1].BackPrev;
				return 1u;
			}
			_optimum[1].PosPrev = 0u;
			_optimum[0].Backs0 = reps[0];
			_optimum[0].Backs1 = reps[1];
			_optimum[0].Backs2 = reps[2];
			_optimum[0].Backs3 = reps[3];
			uint num9 = num8;
			do
			{
				_optimum[num9--].Price = 268435455u;
			}
			while (num9 >= 2);
			for (uint num3 = 0u; num3 < 4; num3++)
			{
				uint num10 = repLens[num3];
				if (num10 < 2)
				{
					continue;
				}
				uint num11 = num6 + GetPureRepPrice(num3, _state, num5);
				do
				{
					uint num12 = num11 + _repMatchLenEncoder.GetPrice(num10 - 2, num5);
					Optimal optimal = _optimum[num10];
					if (num12 < optimal.Price)
					{
						optimal.Price = num12;
						optimal.PosPrev = 0u;
						optimal.BackPrev = num3;
						optimal.Prev1IsChar = false;
					}
				}
				while (--num10 >= 2);
			}
			uint num13 = price + _isRep[_state.Index].GetPrice0();
			num9 = ((repLens[0] >= 2) ? (repLens[0] + 1) : 2u);
			if (num9 <= lenRes)
			{
				uint num14;
				for (num14 = 0u; num9 > _matchDistances[num14]; num14 += 2)
				{
				}
				while (true)
				{
					uint num15 = _matchDistances[num14 + 1];
					uint num16 = num13 + GetPosLenPrice(num15, num9, num5);
					Optimal optimal2 = _optimum[num9];
					if (num16 < optimal2.Price)
					{
						optimal2.Price = num16;
						optimal2.PosPrev = 0u;
						optimal2.BackPrev = num15 + 4;
						optimal2.Prev1IsChar = false;
					}
					if (num9 == _matchDistances[num14])
					{
						num14 += 2;
						if (num14 == numDistancePairs)
						{
							break;
						}
					}
					num9++;
				}
			}
			uint num17 = 0u;
			uint lenRes2;
			while (true)
			{
				num17++;
				if (num17 == num8)
				{
					return Backward(out backRes, num17);
				}
				ReadMatchDistances(out lenRes2, out numDistancePairs);
				if (lenRes2 >= _numFastBytes)
				{
					break;
				}
				position++;
				uint num18 = _optimum[num17].PosPrev;
				Base.State state;
				if (_optimum[num17].Prev1IsChar)
				{
					num18--;
					if (_optimum[num17].Prev2)
					{
						state = _optimum[_optimum[num17].PosPrev2].State;
						if (_optimum[num17].BackPrev2 < 4)
						{
							state.UpdateRep();
						}
						else
						{
							state.UpdateMatch();
						}
					}
					else
					{
						state = _optimum[num18].State;
					}
					state.UpdateChar();
				}
				else
				{
					state = _optimum[num18].State;
				}
				if (num18 == num17 - 1)
				{
					if (_optimum[num17].IsShortRep())
					{
						state.UpdateShortRep();
					}
					else
					{
						state.UpdateChar();
					}
				}
				else
				{
					uint num19;
					if (_optimum[num17].Prev1IsChar && _optimum[num17].Prev2)
					{
						num18 = _optimum[num17].PosPrev2;
						num19 = _optimum[num17].BackPrev2;
						state.UpdateRep();
					}
					else
					{
						num19 = _optimum[num17].BackPrev;
						if (num19 < 4)
						{
							state.UpdateRep();
						}
						else
						{
							state.UpdateMatch();
						}
					}
					Optimal optimal3 = _optimum[num18];
					switch (num19)
					{
					case 0u:
						reps[0] = optimal3.Backs0;
						reps[1] = optimal3.Backs1;
						reps[2] = optimal3.Backs2;
						reps[3] = optimal3.Backs3;
						break;
					case 1u:
						reps[0] = optimal3.Backs1;
						reps[1] = optimal3.Backs0;
						reps[2] = optimal3.Backs2;
						reps[3] = optimal3.Backs3;
						break;
					case 2u:
						reps[0] = optimal3.Backs2;
						reps[1] = optimal3.Backs0;
						reps[2] = optimal3.Backs1;
						reps[3] = optimal3.Backs3;
						break;
					case 3u:
						reps[0] = optimal3.Backs3;
						reps[1] = optimal3.Backs0;
						reps[2] = optimal3.Backs1;
						reps[3] = optimal3.Backs2;
						break;
					default:
						reps[0] = num19 - 4;
						reps[1] = optimal3.Backs0;
						reps[2] = optimal3.Backs1;
						reps[3] = optimal3.Backs2;
						break;
					}
				}
				_optimum[num17].State = state;
				_optimum[num17].Backs0 = reps[0];
				_optimum[num17].Backs1 = reps[1];
				_optimum[num17].Backs2 = reps[2];
				_optimum[num17].Backs3 = reps[3];
				uint price2 = _optimum[num17].Price;
				indexByte = _matchFinder.GetIndexByte(-1);
				indexByte2 = _matchFinder.GetIndexByte((int)(0 - reps[0] - 1 - 1));
				num5 = position & _posStateMask;
				uint num20 = price2 + _isMatch[(state.Index << 4) + num5].GetPrice0() + _literalEncoder.GetSubCoder(position, _matchFinder.GetIndexByte(-2)).GetPrice(!state.IsCharState(), indexByte2, indexByte);
				Optimal optimal4 = _optimum[num17 + 1];
				bool flag = false;
				if (num20 < optimal4.Price)
				{
					optimal4.Price = num20;
					optimal4.PosPrev = num17;
					optimal4.MakeAsChar();
					flag = true;
				}
				price = price2 + _isMatch[(state.Index << 4) + num5].GetPrice1();
				num6 = price + _isRep[state.Index].GetPrice1();
				if (indexByte2 == indexByte && (optimal4.PosPrev >= num17 || optimal4.BackPrev != 0))
				{
					uint num21 = num6 + GetRepLen1Price(state, num5);
					if (num21 <= optimal4.Price)
					{
						optimal4.Price = num21;
						optimal4.PosPrev = num17;
						optimal4.MakeAsShortRep();
						flag = true;
					}
				}
				uint val = _matchFinder.GetNumAvailableBytes() + 1;
				val = Math.Min(4095 - num17, val);
				num = val;
				if (num < 2)
				{
					continue;
				}
				if (num > _numFastBytes)
				{
					num = _numFastBytes;
				}
				if (!flag && indexByte2 != indexByte)
				{
					uint limit = Math.Min(val - 1, _numFastBytes);
					uint matchLen = _matchFinder.GetMatchLen(0, reps[0], limit);
					if (matchLen >= 2)
					{
						Base.State state2 = state;
						state2.UpdateChar();
						uint num22 = (position + 1) & _posStateMask;
						uint num23 = num20 + _isMatch[(state2.Index << 4) + num22].GetPrice1() + _isRep[state2.Index].GetPrice1();
						uint num24 = num17 + 1 + matchLen;
						while (num8 < num24)
						{
							_optimum[++num8].Price = 268435455u;
						}
						uint num25 = num23 + GetRepPrice(0u, matchLen, state2, num22);
						Optimal optimal5 = _optimum[num24];
						if (num25 < optimal5.Price)
						{
							optimal5.Price = num25;
							optimal5.PosPrev = num17 + 1;
							optimal5.BackPrev = 0u;
							optimal5.Prev1IsChar = true;
							optimal5.Prev2 = false;
						}
					}
				}
				uint num26 = 2u;
				for (uint num27 = 0u; num27 < 4; num27++)
				{
					uint num28 = _matchFinder.GetMatchLen(-1, reps[num27], num);
					if (num28 < 2)
					{
						continue;
					}
					uint num29 = num28;
					while (true)
					{
						if (num8 < num17 + num28)
						{
							_optimum[++num8].Price = 268435455u;
							continue;
						}
						uint num30 = num6 + GetRepPrice(num27, num28, state, num5);
						Optimal optimal6 = _optimum[num17 + num28];
						if (num30 < optimal6.Price)
						{
							optimal6.Price = num30;
							optimal6.PosPrev = num17;
							optimal6.BackPrev = num27;
							optimal6.Prev1IsChar = false;
						}
						if (--num28 < 2)
						{
							break;
						}
					}
					num28 = num29;
					if (num27 == 0)
					{
						num26 = num28 + 1;
					}
					if (num28 >= val)
					{
						continue;
					}
					uint limit2 = Math.Min(val - 1 - num28, _numFastBytes);
					uint matchLen2 = _matchFinder.GetMatchLen((int)num28, reps[num27], limit2);
					if (matchLen2 >= 2)
					{
						Base.State state3 = state;
						state3.UpdateRep();
						uint num31 = (position + num28) & _posStateMask;
						uint num32 = num6 + GetRepPrice(num27, num28, state, num5) + _isMatch[(state3.Index << 4) + num31].GetPrice0() + _literalEncoder.GetSubCoder(position + num28, _matchFinder.GetIndexByte((int)(num28 - 1 - 1))).GetPrice(matchMode: true, _matchFinder.GetIndexByte((int)(num28 - 1 - (reps[num27] + 1))), _matchFinder.GetIndexByte((int)(num28 - 1)));
						state3.UpdateChar();
						num31 = (position + num28 + 1) & _posStateMask;
						uint num33 = num32 + _isMatch[(state3.Index << 4) + num31].GetPrice1() + _isRep[state3.Index].GetPrice1();
						uint num34 = num28 + 1 + matchLen2;
						while (num8 < num17 + num34)
						{
							_optimum[++num8].Price = 268435455u;
						}
						uint num35 = num33 + GetRepPrice(0u, matchLen2, state3, num31);
						Optimal optimal7 = _optimum[num17 + num34];
						if (num35 < optimal7.Price)
						{
							optimal7.Price = num35;
							optimal7.PosPrev = num17 + num28 + 1;
							optimal7.BackPrev = 0u;
							optimal7.Prev1IsChar = true;
							optimal7.Prev2 = true;
							optimal7.PosPrev2 = num17;
							optimal7.BackPrev2 = num27;
						}
					}
				}
				if (lenRes2 > num)
				{
					lenRes2 = num;
					for (numDistancePairs = 0u; lenRes2 > _matchDistances[numDistancePairs]; numDistancePairs += 2)
					{
					}
					_matchDistances[numDistancePairs] = lenRes2;
					numDistancePairs += 2;
				}
				if (lenRes2 < num26)
				{
					continue;
				}
				num13 = price + _isRep[state.Index].GetPrice0();
				while (num8 < num17 + lenRes2)
				{
					_optimum[++num8].Price = 268435455u;
				}
				uint num36;
				for (num36 = 0u; num26 > _matchDistances[num36]; num36 += 2)
				{
				}
				uint num37 = num26;
				while (true)
				{
					uint num38 = _matchDistances[num36 + 1];
					uint num39 = num13 + GetPosLenPrice(num38, num37, num5);
					Optimal optimal8 = _optimum[num17 + num37];
					if (num39 < optimal8.Price)
					{
						optimal8.Price = num39;
						optimal8.PosPrev = num17;
						optimal8.BackPrev = num38 + 4;
						optimal8.Prev1IsChar = false;
					}
					if (num37 == _matchDistances[num36])
					{
						if (num37 < val)
						{
							uint limit3 = Math.Min(val - 1 - num37, _numFastBytes);
							uint matchLen3 = _matchFinder.GetMatchLen((int)num37, num38, limit3);
							if (matchLen3 >= 2)
							{
								Base.State state4 = state;
								state4.UpdateMatch();
								uint num40 = (position + num37) & _posStateMask;
								uint num41 = num39 + _isMatch[(state4.Index << 4) + num40].GetPrice0() + _literalEncoder.GetSubCoder(position + num37, _matchFinder.GetIndexByte((int)(num37 - 1 - 1))).GetPrice(matchMode: true, _matchFinder.GetIndexByte((int)(num37 - (num38 + 1) - 1)), _matchFinder.GetIndexByte((int)(num37 - 1)));
								state4.UpdateChar();
								num40 = (position + num37 + 1) & _posStateMask;
								uint num42 = num41 + _isMatch[(state4.Index << 4) + num40].GetPrice1() + _isRep[state4.Index].GetPrice1();
								uint num43 = num37 + 1 + matchLen3;
								while (num8 < num17 + num43)
								{
									_optimum[++num8].Price = 268435455u;
								}
								num39 = num42 + GetRepPrice(0u, matchLen3, state4, num40);
								optimal8 = _optimum[num17 + num43];
								if (num39 < optimal8.Price)
								{
									optimal8.Price = num39;
									optimal8.PosPrev = num17 + num37 + 1;
									optimal8.BackPrev = 0u;
									optimal8.Prev1IsChar = true;
									optimal8.Prev2 = true;
									optimal8.PosPrev2 = num17;
									optimal8.BackPrev2 = num38 + 4;
								}
							}
						}
						num36 += 2;
						if (num36 == numDistancePairs)
						{
							break;
						}
					}
					num37++;
				}
			}
			_numDistancePairs = numDistancePairs;
			_longestMatchLength = lenRes2;
			_longestMatchWasFound = true;
			return Backward(out backRes, num17);
		}

		private bool ChangePair(uint smallDist, uint bigDist)
		{
			if (smallDist < 33554432)
			{
				return bigDist >= smallDist << 7;
			}
			return false;
		}

		private void WriteEndMarker(uint posState)
		{
			if (_writeEndMark)
			{
				_isMatch[(_state.Index << 4) + posState].Encode(_rangeEncoder, 1u);
				_isRep[_state.Index].Encode(_rangeEncoder, 0u);
				_state.UpdateMatch();
				uint num = 2u;
				_lenEncoder.Encode(_rangeEncoder, num - 2, posState);
				uint symbol = 63u;
				uint lenToPosState = Base.GetLenToPosState(num);
				_posSlotEncoder[lenToPosState].Encode(_rangeEncoder, symbol);
				int num2 = 30;
				uint num3 = (uint)((1 << num2) - 1);
				_rangeEncoder.EncodeDirectBits(num3 >> 4, num2 - 4);
				_posAlignEncoder.ReverseEncode(_rangeEncoder, num3 & 0xFu);
			}
		}

		private void Flush(uint nowPos)
		{
			ReleaseMFStream();
			WriteEndMarker(nowPos & _posStateMask);
			_rangeEncoder.FlushData();
			_rangeEncoder.FlushStream();
		}

		public void CodeOneBlock(out long inSize, out long outSize, out bool finished)
		{
			inSize = 0L;
			outSize = 0L;
			finished = true;
			if (_inStream != null)
			{
				_matchFinder.SetStream(_inStream);
				_matchFinder.Init();
				_needReleaseMFStream = true;
				_inStream = null;
				if (_trainSize != 0)
				{
					_matchFinder.Skip(_trainSize);
				}
			}
			if (_finished)
			{
				return;
			}
			_finished = true;
			long num = nowPos64;
			if (nowPos64 == 0L)
			{
				if (_matchFinder.GetNumAvailableBytes() == 0)
				{
					Flush((uint)nowPos64);
					return;
				}
				ReadMatchDistances(out var _, out var _);
				uint num2 = (uint)(int)nowPos64 & _posStateMask;
				_isMatch[(_state.Index << 4) + num2].Encode(_rangeEncoder, 0u);
				_state.UpdateChar();
				byte indexByte = _matchFinder.GetIndexByte((int)(0 - _additionalOffset));
				_literalEncoder.GetSubCoder((uint)nowPos64, _previousByte).Encode(_rangeEncoder, indexByte);
				_previousByte = indexByte;
				_additionalOffset--;
				nowPos64++;
			}
			if (_matchFinder.GetNumAvailableBytes() == 0)
			{
				Flush((uint)nowPos64);
				return;
			}
			while (true)
			{
				uint backRes;
				uint optimum = GetOptimum((uint)nowPos64, out backRes);
				uint num3 = (uint)(int)nowPos64 & _posStateMask;
				uint num4 = (_state.Index << 4) + num3;
				if (optimum == 1 && backRes == uint.MaxValue)
				{
					_isMatch[num4].Encode(_rangeEncoder, 0u);
					byte indexByte2 = _matchFinder.GetIndexByte((int)(0 - _additionalOffset));
					LiteralEncoder.Encoder2 subCoder = _literalEncoder.GetSubCoder((uint)nowPos64, _previousByte);
					if (!_state.IsCharState())
					{
						byte indexByte3 = _matchFinder.GetIndexByte((int)(0 - _repDistances[0] - 1 - _additionalOffset));
						subCoder.EncodeMatched(_rangeEncoder, indexByte3, indexByte2);
					}
					else
					{
						subCoder.Encode(_rangeEncoder, indexByte2);
					}
					_previousByte = indexByte2;
					_state.UpdateChar();
				}
				else
				{
					_isMatch[num4].Encode(_rangeEncoder, 1u);
					if (backRes < 4)
					{
						_isRep[_state.Index].Encode(_rangeEncoder, 1u);
						if (backRes == 0)
						{
							_isRepG0[_state.Index].Encode(_rangeEncoder, 0u);
							if (optimum == 1)
							{
								_isRep0Long[num4].Encode(_rangeEncoder, 0u);
							}
							else
							{
								_isRep0Long[num4].Encode(_rangeEncoder, 1u);
							}
						}
						else
						{
							_isRepG0[_state.Index].Encode(_rangeEncoder, 1u);
							if (backRes == 1)
							{
								_isRepG1[_state.Index].Encode(_rangeEncoder, 0u);
							}
							else
							{
								_isRepG1[_state.Index].Encode(_rangeEncoder, 1u);
								_isRepG2[_state.Index].Encode(_rangeEncoder, backRes - 2);
							}
						}
						if (optimum == 1)
						{
							_state.UpdateShortRep();
						}
						else
						{
							_repMatchLenEncoder.Encode(_rangeEncoder, optimum - 2, num3);
							_state.UpdateRep();
						}
						uint num5 = _repDistances[backRes];
						if (backRes != 0)
						{
							for (uint num6 = backRes; num6 >= 1; num6--)
							{
								_repDistances[num6] = _repDistances[num6 - 1];
							}
							_repDistances[0] = num5;
						}
					}
					else
					{
						_isRep[_state.Index].Encode(_rangeEncoder, 0u);
						_state.UpdateMatch();
						_lenEncoder.Encode(_rangeEncoder, optimum - 2, num3);
						backRes -= 4;
						uint posSlot = GetPosSlot(backRes);
						uint lenToPosState = Base.GetLenToPosState(optimum);
						_posSlotEncoder[lenToPosState].Encode(_rangeEncoder, posSlot);
						if (posSlot >= 4)
						{
							int num7 = (int)((posSlot >> 1) - 1);
							uint num8 = (2 | (posSlot & 1)) << num7;
							uint num9 = backRes - num8;
							if (posSlot < 14)
							{
								BitTreeEncoder.ReverseEncode(_posEncoders, num8 - posSlot - 1, _rangeEncoder, num7, num9);
							}
							else
							{
								_rangeEncoder.EncodeDirectBits(num9 >> 4, num7 - 4);
								_posAlignEncoder.ReverseEncode(_rangeEncoder, num9 & 0xFu);
								_alignPriceCount++;
							}
						}
						uint num10 = backRes;
						for (uint num11 = 3u; num11 >= 1; num11--)
						{
							_repDistances[num11] = _repDistances[num11 - 1];
						}
						_repDistances[0] = num10;
						_matchPriceCount++;
					}
					_previousByte = _matchFinder.GetIndexByte((int)(optimum - 1 - _additionalOffset));
				}
				_additionalOffset -= optimum;
				nowPos64 += optimum;
				if (_additionalOffset == 0)
				{
					if (_matchPriceCount >= 128)
					{
						FillDistancesPrices();
					}
					if (_alignPriceCount >= 16)
					{
						FillAlignPrices();
					}
					inSize = nowPos64;
					outSize = _rangeEncoder.GetProcessedSizeAdd();
					if (_matchFinder.GetNumAvailableBytes() == 0)
					{
						Flush((uint)nowPos64);
						return;
					}
					if (nowPos64 - num >= 4096)
					{
						break;
					}
				}
			}
			_finished = false;
			finished = false;
		}

		private void ReleaseMFStream()
		{
			if (_matchFinder != null && _needReleaseMFStream)
			{
				_matchFinder.ReleaseStream();
				_needReleaseMFStream = false;
			}
		}

		private void SetOutStream(Stream outStream)
		{
			_rangeEncoder.SetStream(outStream);
		}

		private void ReleaseOutStream()
		{
			_rangeEncoder.ReleaseStream();
		}

		private void ReleaseStreams()
		{
			ReleaseMFStream();
			ReleaseOutStream();
		}

		private void SetStreams(Stream inStream, Stream outStream, long inSize, long outSize)
		{
			_inStream = inStream;
			_finished = false;
			Create();
			SetOutStream(outStream);
			Init();
			FillDistancesPrices();
			FillAlignPrices();
			_lenEncoder.SetTableSize(_numFastBytes + 1 - 2);
			_lenEncoder.UpdateTables((uint)(1 << _posStateBits));
			_repMatchLenEncoder.SetTableSize(_numFastBytes + 1 - 2);
			_repMatchLenEncoder.UpdateTables((uint)(1 << _posStateBits));
			nowPos64 = 0L;
		}

		public void Code(Stream inStream, Stream outStream, long inSize, long outSize, ICodeProgress progress)
		{
			_needReleaseMFStream = false;
			try
			{
				SetStreams(inStream, outStream, inSize, outSize);
				while (true)
				{
					CodeOneBlock(out var inSize2, out var outSize2, out var finished);
					if (finished)
					{
						break;
					}
					progress?.SetProgress(inSize2, outSize2);
				}
			}
			finally
			{
				ReleaseStreams();
			}
		}

		public void WriteCoderProperties(Stream outStream)
		{
			properties[0] = (byte)((_posStateBits * 5 + _numLiteralPosStateBits) * 9 + _numLiteralContextBits);
			for (int i = 0; i < 4; i++)
			{
				properties[1 + i] = (byte)((_dictionarySize >> 8 * i) & 0xFFu);
			}
			outStream.Write(properties, 0, 5);
		}

		private void FillDistancesPrices()
		{
			for (uint num = 4u; num < 128; num++)
			{
				uint posSlot = GetPosSlot(num);
				int num2 = (int)((posSlot >> 1) - 1);
				uint num3 = (2 | (posSlot & 1)) << num2;
				tempPrices[num] = BitTreeEncoder.ReverseGetPrice(_posEncoders, num3 - posSlot - 1, num2, num - num3);
			}
			for (uint num4 = 0u; num4 < 4; num4++)
			{
				BitTreeEncoder bitTreeEncoder = _posSlotEncoder[num4];
				uint num5 = num4 << 6;
				for (uint num6 = 0u; num6 < _distTableSize; num6++)
				{
					_posSlotPrices[num5 + num6] = bitTreeEncoder.GetPrice(num6);
				}
				for (uint num6 = 14u; num6 < _distTableSize; num6++)
				{
					_posSlotPrices[num5 + num6] += (num6 >> 1) - 1 - 4 << 6;
				}
				uint num7 = num4 * 128;
				uint num8;
				for (num8 = 0u; num8 < 4; num8++)
				{
					_distancesPrices[num7 + num8] = _posSlotPrices[num5 + num8];
				}
				for (; num8 < 128; num8++)
				{
					_distancesPrices[num7 + num8] = _posSlotPrices[num5 + GetPosSlot(num8)] + tempPrices[num8];
				}
			}
			_matchPriceCount = 0u;
		}

		private void FillAlignPrices()
		{
			for (uint num = 0u; num < 16; num++)
			{
				_alignPrices[num] = _posAlignEncoder.ReverseGetPrice(num);
			}
			_alignPriceCount = 0u;
		}

		private static int FindMatchFinder(string s)
		{
			for (int i = 0; i < kMatchFinderIDs.Length; i++)
			{
				if (s == kMatchFinderIDs[i])
				{
					return i;
				}
			}
			return -1;
		}

		public void SetCoderProperties(CoderPropID[] propIDs, object[] properties)
		{
			for (uint num = 0u; num < properties.Length; num++)
			{
				object obj = properties[num];
				switch (propIDs[num])
				{
				case CoderPropID.NumFastBytes:
					if (!(obj is int num2))
					{
						throw new InvalidParamException();
					}
					if (num2 < 5 || (long)num2 > 273L)
					{
						throw new InvalidParamException();
					}
					_numFastBytes = (uint)num2;
					break;
				case CoderPropID.MatchFinder:
				{
					if (!(obj is string))
					{
						throw new InvalidParamException();
					}
					EMatchFinderType matchFinderType = _matchFinderType;
					int num6 = FindMatchFinder(((string)obj).ToUpper());
					if (num6 < 0)
					{
						throw new InvalidParamException();
					}
					_matchFinderType = (EMatchFinderType)num6;
					if (_matchFinder != null && matchFinderType != _matchFinderType)
					{
						_dictionarySizePrev = uint.MaxValue;
						_matchFinder = null;
					}
					break;
				}
				case CoderPropID.DictionarySize:
				{
					if (!(obj is int num7))
					{
						throw new InvalidParamException();
					}
					if ((long)num7 < 1L || (long)num7 > 1073741824L)
					{
						throw new InvalidParamException();
					}
					_dictionarySize = (uint)num7;
					int i;
					for (i = 0; (long)i < 30L && num7 > (uint)(1 << i); i++)
					{
					}
					_distTableSize = (uint)(i * 2);
					break;
				}
				case CoderPropID.PosStateBits:
					if (!(obj is int num3))
					{
						throw new InvalidParamException();
					}
					if (num3 < 0 || (long)num3 > 4L)
					{
						throw new InvalidParamException();
					}
					_posStateBits = num3;
					_posStateMask = (uint)((1 << _posStateBits) - 1);
					break;
				case CoderPropID.LitPosBits:
					if (!(obj is int num5))
					{
						throw new InvalidParamException();
					}
					if (num5 < 0 || (long)num5 > 4L)
					{
						throw new InvalidParamException();
					}
					_numLiteralPosStateBits = num5;
					break;
				case CoderPropID.LitContextBits:
					if (!(obj is int num4))
					{
						throw new InvalidParamException();
					}
					if (num4 < 0 || (long)num4 > 8L)
					{
						throw new InvalidParamException();
					}
					_numLiteralContextBits = num4;
					break;
				case CoderPropID.EndMarker:
					if (!(obj is bool))
					{
						throw new InvalidParamException();
					}
					SetWriteEndMarkerMode((bool)obj);
					break;
				default:
					throw new InvalidParamException();
				case CoderPropID.Algorithm:
					break;
				}
			}
		}

		public void SetTrainSize(uint trainSize)
		{
			_trainSize = trainSize;
		}
	}
	public static class SevenZipHelper
	{
		private static CoderPropID[] propIDs = new CoderPropID[8]
		{
			CoderPropID.DictionarySize,
			CoderPropID.PosStateBits,
			CoderPropID.LitContextBits,
			CoderPropID.LitPosBits,
			CoderPropID.Algorithm,
			CoderPropID.NumFastBytes,
			CoderPropID.MatchFinder,
			CoderPropID.EndMarker
		};

		private static object[] properties = new object[8] { 2097152, 2, 3, 0, 2, 32, "bt4", false };

		public static byte[] Compress(byte[] inputBytes, ICodeProgress progress = null)
		{
			MemoryStream inStream = new MemoryStream(inputBytes);
			MemoryStream memoryStream = new MemoryStream();
			Compress(inStream, memoryStream, progress);
			return memoryStream.ToArray();
		}

		public static void Compress(Stream inStream, Stream outStream, ICodeProgress progress = null)
		{
			Encoder encoder = new Encoder();
			encoder.SetCoderProperties(propIDs, properties);
			encoder.WriteCoderProperties(outStream);
			encoder.Code(inStream, outStream, -1L, -1L, progress);
		}

		public static byte[] Decompress(byte[] inputBytes)
		{
			MemoryStream memoryStream = new MemoryStream(inputBytes);
			Decoder decoder = new Decoder();
			memoryStream.Seek(0L, SeekOrigin.Begin);
			MemoryStream memoryStream2 = new MemoryStream();
			byte[] array = new byte[5];
			if (memoryStream.Read(array, 0, 5) != 5)
			{
				throw new Exception("input .lzma is too short");
			}
			long num = 0L;
			for (int i = 0; i < 8; i++)
			{
				int num2 = memoryStream.ReadByte();
				if (num2 < 0)
				{
					throw new Exception("Can't Read 1");
				}
				num |= (long)((ulong)(byte)num2 << 8 * i);
			}
			decoder.SetDecoderProperties(array);
			long inSize = memoryStream.Length - memoryStream.Position;
			decoder.Code(memoryStream, memoryStream2, inSize, num, null);
			return memoryStream2.ToArray();
		}

		public static MemoryStream StreamDecompress(MemoryStream newInStream)
		{
			Decoder decoder = new Decoder();
			newInStream.Seek(0L, SeekOrigin.Begin);
			MemoryStream memoryStream = new MemoryStream();
			byte[] array = new byte[5];
			if (newInStream.Read(array, 0, 5) != 5)
			{
				throw new Exception("input .lzma is too short");
			}
			long num = 0L;
			for (int i = 0; i < 8; i++)
			{
				int num2 = newInStream.ReadByte();
				if (num2 < 0)
				{
					throw new Exception("Can't Read 1");
				}
				num |= (long)((ulong)(byte)num2 << 8 * i);
			}
			decoder.SetDecoderProperties(array);
			long inSize = newInStream.Length - newInStream.Position;
			decoder.Code(newInStream, memoryStream, inSize, num, null);
			memoryStream.Position = 0L;
			return memoryStream;
		}

		public static MemoryStream StreamDecompress(MemoryStream newInStream, long outSize)
		{
			Decoder decoder = new Decoder();
			newInStream.Seek(0L, SeekOrigin.Begin);
			MemoryStream memoryStream = new MemoryStream();
			byte[] array = new byte[5];
			if (newInStream.Read(array, 0, 5) != 5)
			{
				throw new Exception("input .lzma is too short");
			}
			decoder.SetDecoderProperties(array);
			long inSize = newInStream.Length - newInStream.Position;
			decoder.Code(newInStream, memoryStream, inSize, outSize, null);
			memoryStream.Position = 0L;
			return memoryStream;
		}

		public static void StreamDecompress(Stream compressedStream, Stream decompressedStream, long compressedSize, long decompressedSize)
		{
			long position = compressedStream.Position;
			Decoder decoder = new Decoder();
			byte[] array = new byte[5];
			if (compressedStream.Read(array, 0, 5) != 5)
			{
				throw new Exception("input .lzma is too short");
			}
			decoder.SetDecoderProperties(array);
			decoder.Code(compressedStream, decompressedStream, compressedSize - 5, decompressedSize, null);
			compressedStream.Position = position + compressedSize;
		}
	}
}
namespace SevenZip.Buffer
{
	public class InBuffer
	{
		private byte[] m_Buffer;

		private uint m_Pos;

		private uint m_Limit;

		private uint m_BufferSize;

		private Stream m_Stream;

		private bool m_StreamWasExhausted;

		private ulong m_ProcessedSize;

		public InBuffer(uint bufferSize)
		{
			m_Buffer = new byte[bufferSize];
			m_BufferSize = bufferSize;
		}

		public void Init(Stream stream)
		{
			m_Stream = stream;
			m_ProcessedSize = 0uL;
			m_Limit = 0u;
			m_Pos = 0u;
			m_StreamWasExhausted = false;
		}

		public bool ReadBlock()
		{
			if (m_StreamWasExhausted)
			{
				return false;
			}
			m_ProcessedSize += m_Pos;
			int num = m_Stream.Read(m_Buffer, 0, (int)m_BufferSize);
			m_Pos = 0u;
			m_Limit = (uint)num;
			m_StreamWasExhausted = num == 0;
			return !m_StreamWasExhausted;
		}

		public void ReleaseStream()
		{
			m_Stream = null;
		}

		public bool ReadByte(byte b)
		{
			if (m_Pos >= m_Limit && !ReadBlock())
			{
				return false;
			}
			b = m_Buffer[m_Pos++];
			return true;
		}

		public byte ReadByte()
		{
			if (m_Pos >= m_Limit && !ReadBlock())
			{
				return byte.MaxValue;
			}
			return m_Buffer[m_Pos++];
		}

		public ulong GetProcessedSize()
		{
			return m_ProcessedSize + m_Pos;
		}
	}
	public class OutBuffer
	{
		private byte[] m_Buffer;

		private uint m_Pos;

		private uint m_BufferSize;

		private Stream m_Stream;

		private ulong m_ProcessedSize;

		public OutBuffer(uint bufferSize)
		{
			m_Buffer = new byte[bufferSize];
			m_BufferSize = bufferSize;
		}

		public void SetStream(Stream stream)
		{
			m_Stream = stream;
		}

		public void FlushStream()
		{
			m_Stream.Flush();
		}

		public void CloseStream()
		{
			m_Stream.Close();
		}

		public void ReleaseStream()
		{
			m_Stream = null;
		}

		public void Init()
		{
			m_ProcessedSize = 0uL;
			m_Pos = 0u;
		}

		public void WriteByte(byte b)
		{
			m_Buffer[m_Pos++] = b;
			if (m_Pos >= m_BufferSize)
			{
				FlushData();
			}
		}

		public void FlushData()
		{
			if (m_Pos != 0)
			{
				m_Stream.Write(m_Buffer, 0, (int)m_Pos);
				m_Pos = 0u;
			}
		}

		public ulong GetProcessedSize()
		{
			return m_ProcessedSize + m_Pos;
		}
	}
}
namespace SevenZip.CommandLineParser
{
	public enum SwitchType
	{
		Simple,
		PostMinus,
		LimitedPostString,
		UnLimitedPostString,
		PostChar
	}
	public class SwitchForm
	{
		public string IDString;

		public SwitchType Type;

		public bool Multi;

		public int MinLen;

		public int MaxLen;

		public string PostCharSet;

		public SwitchForm(string idString, SwitchType type, bool multi, int minLen, int maxLen, string postCharSet)
		{
			IDString = idString;
			Type = type;
			Multi = multi;
			MinLen = minLen;
			MaxLen = maxLen;
			PostCharSet = postCharSet;
		}

		public SwitchForm(string idString, SwitchType type, bool multi, int minLen)
			: this(idString, type, multi, minLen, 0, "")
		{
		}

		public SwitchForm(string idString, SwitchType type, bool multi)
			: this(idString, type, multi, 0)
		{
		}
	}
	public class SwitchResult
	{
		public bool ThereIs;

		public bool WithMinus;

		public ArrayList PostStrings = new ArrayList();

		public int PostCharIndex;

		public SwitchResult()
		{
			ThereIs = false;
		}
	}
	public class Parser
	{
		public ArrayList NonSwitchStrings = new ArrayList();

		private SwitchResult[] _switches;

		private const char kSwitchID1 = '-';

		private const char kSwitchID2 = '/';

		private const char kSwitchMinus = '-';

		private const string kStopSwitchParsing = "--";

		public SwitchResult this[int index] => _switches[index];

		public Parser(int numSwitches)
		{
			_switches = new SwitchResult[numSwitches];
			for (int i = 0; i < numSwitches; i++)
			{
				_switches[i] = new SwitchResult();
			}
		}

		private bool ParseString(string srcString, SwitchForm[] switchForms)
		{
			int length = srcString.Length;
			if (length == 0)
			{
				return false;
			}
			int num = 0;
			if (!IsItSwitchChar(srcString[num]))
			{
				return false;
			}
			while (num < length)
			{
				if (IsItSwitchChar(srcString[num]))
				{
					num++;
				}
				int num2 = 0;
				int num3 = -1;
				for (int i = 0; i < _switches.Length; i++)
				{
					int length2 = switchForms[i].IDString.Length;
					if (length2 > num3 && num + length2 <= length && string.Compare(switchForms[i].IDString, 0, srcString, num, length2, ignoreCase: true) == 0)
					{
						num2 = i;
						num3 = length2;
					}
				}
				if (num3 == -1)
				{
					throw new Exception("maxLen == kNoLen");
				}
				SwitchResult switchResult = _switches[num2];
				SwitchForm switchForm = switchForms[num2];
				if (!switchForm.Multi && switchResult.ThereIs)
				{
					throw new Exception("switch must be single");
				}
				switchResult.ThereIs = true;
				num += num3;
				int num4 = length - num;
				SwitchType type = switchForm.Type;
				switch (type)
				{
				case SwitchType.PostMinus:
					if (num4 == 0)
					{
						switchResult.WithMinus = false;
						break;
					}
					switchResult.WithMinus = srcString[num] == '-';
					if (switchResult.WithMinus)
					{
						num++;
					}
					break;
				case SwitchType.PostChar:
				{
					if (num4 < switchForm.MinLen)
					{
						throw new Exception("switch is not full");
					}
					string postCharSet = switchForm.PostCharSet;
					if (num4 == 0)
					{
						switchResult.PostCharIndex = -1;
						break;
					}
					int num6 = postCharSet.IndexOf(srcString[num]);
					if (num6 < 0)
					{
						switchResult.PostCharIndex = -1;
						break;
					}
					switchResult.PostCharIndex = num6;
					num++;
					break;
				}
				case SwitchType.LimitedPostString:
				case SwitchType.UnLimitedPostString:
				{
					int minLen = switchForm.MinLen;
					if (num4 < minLen)
					{
						throw new Exception("switch is not full");
					}
					if (type == SwitchType.UnLimitedPostString)
					{
						switchResult.PostStrings.Add(srcString.Substring(num));
						return true;
					}
					string text = srcString.Substring(num, minLen);
					num += minLen;
					int num5 = minLen;
					while (num5 < switchForm.MaxLen && num < length)
					{
						char c = srcString[num];
						if (IsItSwitchChar(c))
						{
							break;
						}
						text += c;
						num5++;
						num++;
					}
					switchResult.PostStrings.Add(text);
					break;
				}
				}
			}
			return true;
		}

		public void ParseStrings(SwitchForm[] switchForms, string[] commandStrings)
		{
			int num = commandStrings.Length;
			bool flag = false;
			for (int i = 0; i < num; i++)
			{
				string text = commandStrings[i];
				if (flag)
				{
					NonSwitchStrings.Add(text);
				}
				else if (text == "--")
				{
					flag = true;
				}
				else if (!ParseString(text, switchForms))
				{
					NonSwitchStrings.Add(text);
				}
			}
		}

		public static int ParseCommand(CommandForm[] commandForms, string commandString, out string postString)
		{
			for (int i = 0; i < commandForms.Length; i++)
			{
				string iDString = commandForms[i].IDString;
				if (commandForms[i].PostStringMode)
				{
					if (commandString.IndexOf(iDString) == 0)
					{
						postString = commandString.Substring(iDString.Length);
						return i;
					}
				}
				else if (commandString == iDString)
				{
					postString = "";
					return i;
				}
			}
			postString = "";
			return -1;
		}

		private static bool ParseSubCharsCommand(int numForms, CommandSubCharsSet[] forms, string commandString, ArrayList indices)
		{
			indices.Clear();
			int num = 0;
			for (int i = 0; i < numForms; i++)
			{
				CommandSubCharsSet commandSubCharsSet = forms[i];
				int num2 = -1;
				int length = commandSubCharsSet.Chars.Length;
				for (int j = 0; j < length; j++)
				{
					char value = commandSubCharsSet.Chars[j];
					int num3 = commandString.IndexOf(value);
					if (num3 >= 0)
					{
						if (num2 >= 0)
						{
							return false;
						}
						if (commandString.IndexOf(value, num3 + 1) >= 0)
						{
							return false;
						}
						num2 = j;
						num++;
					}
				}
				if (num2 == -1 && !commandSubCharsSet.EmptyAllowed)
				{
					return false;
				}
				indices.Add(num2);
			}
			return num == commandString.Length;
		}

		private static bool IsItSwitchChar(char c)
		{
			if (c != '-')
			{
				return c == '/';
			}
			return true;
		}
	}
	public class CommandForm
	{
		public string IDString = "";

		public bool PostStringMode;

		public CommandForm(string idString, bool postStringMode)
		{
			IDString = idString;
			PostStringMode = postStringMode;
		}
	}
	internal class CommandSubCharsSet
	{
		public string Chars = "";

		public bool EmptyAllowed;
	}
}
namespace LZ4ps
{
	public static class LZ4Codec
	{
		private class LZ4HC_Data_Structure
		{
			public byte[] src;

			public int src_base;

			public int src_end;

			public int src_LASTLITERALS;

			public byte[] dst;

			public int dst_base;

			public int dst_len;

			public int dst_end;

			public int[] hashTable;

			public ushort[] chainTable;

			public int nextToUpdate;
		}

		private const int MEMORY_USAGE = 14;

		private const int NOTCOMPRESSIBLE_DETECTIONLEVEL = 6;

		private const int BLOCK_COPY_LIMIT = 16;

		private const int MINMATCH = 4;

		private const int SKIPSTRENGTH = 6;

		private const int COPYLENGTH = 8;

		private const int LASTLITERALS = 5;

		private const int MFLIMIT = 12;

		private const int MINLENGTH = 13;

		private const int MAXD_LOG = 16;

		private const int MAXD = 65536;

		private const int MAXD_MASK = 65535;

		private const int MAX_DISTANCE = 65535;

		private const int ML_BITS = 4;

		private const int ML_MASK = 15;

		private const int RUN_BITS = 4;

		private const int RUN_MASK = 15;

		private const int STEPSIZE_64 = 8;

		private const int STEPSIZE_32 = 4;

		private const int LZ4_64KLIMIT = 65547;

		private const int HASH_LOG = 12;

		private const int HASH_TABLESIZE = 4096;

		private const int HASH_ADJUST = 20;

		private const int HASH64K_LOG = 13;

		private const int HASH64K_TABLESIZE = 8192;

		private const int HASH64K_ADJUST = 19;

		private const int HASHHC_LOG = 15;

		private const int HASHHC_TABLESIZE = 32768;

		private const int HASHHC_ADJUST = 17;

		private static readonly int[] DECODER_TABLE_32 = new int[8] { 0, 3, 2, 3, 0, 0, 0, 0 };

		private static readonly int[] DECODER_TABLE_64 = new int[8] { 0, 0, 0, -1, 0, 1, 2, 3 };

		private static readonly int[] DEBRUIJN_TABLE_32 = new int[32]
		{
			0, 0, 3, 0, 3, 1, 3, 0, 3, 2,
			2, 1, 3, 2, 0, 1, 3, 3, 1, 2,
			2, 2, 2, 0, 3, 1, 2, 0, 1, 0,
			1, 1
		};

		private static readonly int[] DEBRUIJN_TABLE_64 = new int[64]
		{
			0, 0, 0, 0, 0, 1, 1, 2, 0, 3,
			1, 3, 1, 4, 2, 7, 0, 2, 3, 6,
			1, 5, 3, 5, 1, 3, 4, 4, 2, 5,
			6, 7, 7, 0, 1, 2, 3, 3, 4, 6,
			2, 6, 5, 5, 3, 4, 5, 6, 7, 1,
			2, 4, 6, 4, 4, 5, 7, 2, 6, 5,
			7, 6, 7, 7
		};

		private const int MAX_NB_ATTEMPTS = 256;

		private const int