namespace LSServerService
{
    using LSUtils;
    using System;
    using System.ComponentModel;
    using System.Net;
    using System.Net.Sockets;
    using System.Reflection;
    using System.Runtime.InteropServices;
    using System.Text;

    public class PubUtils
    {
        public static readonly PubUtils Instance = new PubUtils();

        private PubUtils()
        {
        }

        public static byte[] BytesAddStruct(byte[] bytesHead, object structObj)
        {
            byte[] src = StructToBytes(structObj);
            if ((bytesHead == null) || (bytesHead.Length <= 0))
            {
                return src;
            }
            int num = bytesHead.Length + src.Length;
            byte[] dst = new byte[num];
            Buffer.BlockCopy(bytesHead, 0, dst, 0, bytesHead.Length);
            Buffer.BlockCopy(src, 0, dst, bytesHead.Length, src.Length);
            return dst;
        }

        public static byte[] BytesAddStruct(object structObj, byte[] bytesTail)
        {
            byte[] src = StructToBytes(structObj);
            if ((bytesTail == null) || (bytesTail.Length <= 0))
            {
                return src;
            }
            int num = src.Length + bytesTail.Length;
            byte[] dst = new byte[num];
            Buffer.BlockCopy(src, 0, dst, 0, src.Length);
            Buffer.BlockCopy(bytesTail, 0, dst, src.Length, bytesTail.Length);
            return dst;
        }

        public static byte[] BytesIntercept(byte[] SrcBytes, uint FixedLen)
        {
            byte[] dst = new byte[FixedLen];
            int count = (SrcBytes.Length > FixedLen) ? ((int) FixedLen) : SrcBytes.Length;
            Buffer.BlockCopy(SrcBytes, 0, dst, 0, count);
            return dst;
        }

        public static string BytesToStr(byte[] SrcBytes)
        {
            return Encoding.Default.GetString(SrcBytes).Replace("\0", "");
        }

        public static string BytesToStr(byte[] SrcBytes, int index, int count)
        {
            return Encoding.Default.GetString(SrcBytes, index, count).Replace("\0", "");
        }

        public static object BytesToStruct(byte[] bytes, Type structType)
        {
            return BytesToStruct(bytes, structType, 0, 0);
        }

        public static object BytesToStruct(byte[] bytes, Type structType, int startIndex)
        {
            return BytesToStruct(bytes, structType, startIndex, 0);
        }

        public static object BytesToStruct(byte[] bytes, Type structType, string ExceptField)
        {
            return BytesToStruct(bytes, structType, 0, 0, new string[] { ExceptField });
        }

        public static object BytesToStruct(byte[] bytes, Type structType, string[] ExceptFields)
        {
            return BytesToStruct(bytes, structType, 0, 0, ExceptFields);
        }

        public static object BytesToStruct(byte[] bytes, Type structType, int startIndex, int decCount)
        {
            object obj2 = null;
            int num = 1;
            int num2 = 0;
            int num3 = 0;
            while (num > 0)
            {
                int cb = Marshal.SizeOf(structType);
                IntPtr destination = Marshal.AllocHGlobal(cb);
                try
                {
                    num3 = 0;
                    Marshal.Copy(bytes, startIndex, destination, cb - decCount);
                    num3 = 1;
                    obj2 = Marshal.PtrToStructure(destination, structType);
                    num3 = 2;
                }
                catch (Exception exception)
                {
                    WriteLog("PubUtils.BytesToStruct error is {0},size={1},startIndex={2},decCount={3},bError={4},LinePos={5},bytes is:\n{6}", new object[] { exception.Message.ToString(), cb, startIndex, decCount, num2, num3, bytes });
                    num++;
                    if (num2 > 2)
                    {
                        throw new Exception(exception.Message.ToString());
                    }
                    num2++;
                }
                finally
                {
                    Marshal.FreeHGlobal(destination);
                }
                num--;
            }
            return obj2;
        }

        public static object BytesToStruct(byte[] bytes, Type structType, int startIndex, string ExceptField)
        {
            return BytesToStruct(bytes, structType, startIndex, 0, new string[] { ExceptField });
        }

        public static object BytesToStruct(byte[] bytes, Type structType, int startIndex, string[] ExceptFields)
        {
            return BytesToStruct(bytes, structType, startIndex, 0, ExceptFields);
        }

        public static object BytesToStruct(byte[] bytes, Type structType, int startIndex, int decCount, string ExceptField)
        {
            return BytesToStruct(bytes, structType, startIndex, decCount, new string[] { ExceptField });
        }

        public static object BytesToStruct(byte[] bytes, Type structType, int startIndex, int decCount, string[] ExceptFields)
        {
            object obj3;
            try
            {
                string str = "|";
                for (int i = 0; i < ExceptFields.Length; i++)
                {
                    str = str + ExceptFields[i] + "|";
                }
                int dstOffset = 0;
                int num3 = Marshal.SizeOf(structType) - decCount;
                byte[] buffer = new byte[num3];
                object obj2 = BytesToStruct(buffer, structType);
                FieldInfo[] fields = structType.GetFields();
                foreach (FieldInfo info in fields)
                {
                    int count = 0;
                    if (info.FieldType.IsArray)
                    {
                        Array array = (Array) info.GetValue(obj2);
                        count = array.Length;
                    }
                    else
                    {
                        count = Marshal.SizeOf(info.FieldType);
                    }
                    string str2 = "|" + info.Name + "|";
                    if (!str.Contains(str2))
                    {
                        Buffer.BlockCopy(bytes, startIndex, buffer, dstOffset, count);
                        startIndex += count;
                    }
                    dstOffset += count;
                }
                obj3 = BytesToStruct(buffer, structType);
            }
            catch (Exception exception)
            {
                WriteLog("PubUtils.BytesToStruct error: {0},bytes is :\n{1} \n,ExceptFields is \n{2}", new object[] { exception.Message.ToString(), bytes, ExceptFields });
                throw new Exception(exception.Message.ToString());
            }
            return obj3;
        }

        public static byte[] ComposeTwoBytes(byte[] bytesHead, byte[] bytesTail)
        {
            int num = bytesHead.Length + bytesTail.Length;
            byte[] dst = new byte[num];
            Buffer.BlockCopy(bytesHead, 0, dst, 0, bytesHead.Length);
            Buffer.BlockCopy(bytesTail, 0, dst, bytesHead.Length, bytesTail.Length);
            return dst;
        }

        public static byte[] CopyArrayData(byte[] source, int startIndex, int length)
        {
            byte[] buffer = new byte[length];
            for (int i = 0; i < length; i++)
            {
                buffer[i] = source[startIndex + i];
            }
            return buffer;
        }

        public static void CopyStructToBytes(object structObj, byte[] destBytes, int dstOffset)
        {
            int cb = Marshal.SizeOf(structObj);
            IntPtr ptr = Marshal.AllocHGlobal(cb);
            try
            {
                Marshal.StructureToPtr(structObj, ptr, false);
                Marshal.Copy(ptr, destBytes, dstOffset, cb);
            }
            finally
            {
                Marshal.FreeHGlobal(ptr);
            }
        }

        public static IPAddress GetServerIP()
        {
            IPHostEntry hostEntry = Dns.GetHostEntry(Dns.GetHostName());
            foreach (IPAddress address in hostEntry.AddressList)
            {
                if (address.AddressFamily == AddressFamily.InterNetwork)
                {
                    return address;
                }
            }
            return null;
        }

        public static uint IPToLong(string strIP)
        {
            return (uint) IPAddress.Parse(strIP).Address;
        }

        public static string LongToIP(uint dwIP)
        {
            return new IPAddress((long) dwIP).ToString();
        }

        public static string ReadXmlStr(string SrcStr)
        {
            return SrcStr.Replace("&lt;", "<").Replace("&gt;", ">").Replace("&amp;", "&").Replace("&apos;", "'").Replace("&quot;", "\"");
        }

        public static byte[] StrToBytes(string SrcString)
        {
            return Encoding.Default.GetBytes(SrcString);
        }

        public static byte[] StrToBytes(string SrcString, uint FixedLen)
        {
            return StrToBytes(SrcString.ToCharArray(), FixedLen);
        }

        public static byte[] StrToBytes(char[] SrcChar, uint FixedLen)
        {
            return BytesIntercept(Encoding.Default.GetBytes(SrcChar), FixedLen);
        }

        public static byte[] StructToBytes(object structObj)
        {
            byte[] buffer2;
            int cb = Marshal.SizeOf(structObj);
            IntPtr ptr = Marshal.AllocHGlobal(cb);
            try
            {
                Marshal.StructureToPtr(structObj, ptr, false);
                byte[] destination = new byte[cb];
                Marshal.Copy(ptr, destination, 0, cb);
                buffer2 = destination;
            }
            finally
            {
                Marshal.FreeHGlobal(ptr);
            }
            return buffer2;
        }

        public static byte[] StructToBytes(object structObj, int decCount)
        {
            byte[] buffer2;
            int cb = Marshal.SizeOf(structObj);
            IntPtr ptr = Marshal.AllocHGlobal(cb);
            try
            {
                Marshal.StructureToPtr(structObj, ptr, false);
                byte[] destination = new byte[cb - decCount];
                Marshal.Copy(ptr, destination, 0, cb - decCount);
                buffer2 = destination;
            }
            finally
            {
                Marshal.FreeHGlobal(ptr);
            }
            return buffer2;
        }

        public static void WriteLog(string ErrMsg, params object[] args)
        {
            LSWriteLog.WriteLog("sysError.log", ErrMsg, args);
            Win32Exception exception = new Win32Exception();
            LSWriteLog.WriteLog("sysError.log", "Win32Exception= {0}", new object[] { exception });
            exception = null;
        }

        public static string WriteXmlStr(string SrcStr)
        {
            return SrcStr.Replace("<", "&lt;").Replace(">", "&gt;").Replace("&", "&amp;").Replace("'", "&apos;").Replace("\"", "&quot;");
        }

        public static IPAddress LocalFirstIPAddr
        {
            get
            {
                return Dns.Resolve(LocalMachineName).AddressList[0];
            }
        }

        public static uint LocalFirstIPLong
        {
            get
            {
                return (uint) LocalFirstIPAddr.Address;
            }
        }

        public static string LocalFirstIPStr
        {
            get
            {
                return LocalFirstIPAddr.Address.ToString();
            }
        }

        public static string LocalMachineName
        {
            get
            {
                return Environment.MachineName;
            }
        }
    }
}