對象、字節流轉換

數據表示時間 　　長度（字節）　　 數據類型 　　描述及要求
平臺登入時間 　 ??6　　　　　 　 ? BYTE[6] ? ? ?（每個字節分別代表：年、月、日、時、分、秒）
登入流水號 ? ? ? ? ? 2 　　　　　　 ? WORD 　　 ?每登入一次，登入流水號自動加1
平臺用戶名　　 ?? 12 　　　　 ? ? ? STRING 　 ??平臺登入用戶名
平臺密碼　　　　 20 ? ? ? ? ? ? ? ? ? ? STRING　　?平臺登入密碼
加密規則 ? ? ? ? ? ? 1　　　　　　 ?? BYTE ? ? ? ? ?0x01:數據不加密；0x02:RSA加密；0x03:AES128加密...

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//平臺登入類
public class EvPlatformLoginMsg
{public DateTime LoginTime{get;set;}public ushort SerialNumver{get;set;}public string Account{get;set}public string Password{get;set;}public EvEncryptionMode EncryptMode{get;set;}public EvPlatformLoginMsg(byte[] bytes, int offset){EvDateTime evDateTime = new EvDateTime(bytes, offset);LoginTime = evDateTime.DateTime;offset += evDateTime.BytesSize;NetBytesUtil.EnsureNetOrder(bytes, index, 2);SerialNumver = BitConverter.ToUint16(bytes, index);offset += 2;Account = Encoding.ASCII.GetString(bytes, index, 12).TrimEnd('\0');offset += 12;Password = Encoding.ASCII.GetString(bytes, index, 20);offset += 20;EncryptMode = (EvEncryptionMode)bytes[index];}public byte[] ToBytes(){byte[] bytes = new byte[41];int offset = 0;offset += new EvDateTime(LoginTime).WriteToBytes(bytes, offset);BitExtend.WriteUint16ToBytes(bytes, offset, SerialNumver);NetBytesUtil.EnsureNetOrder(bytes, index, 2);index += 2;byte[] accountBytes = Encoding.ASCII.GetBytes(Account);Buffer.BlockCopy(accountBytes, 0, bytes, index, accountBytes.Length > 12 ? 12 : accountBytes.Length);index += 12;byte[] passwordBytes = Encoding.ASCII.GetBytes(Password);Buffer.BlockCopy(passwordBytes, 0, bytes, index, passwordBytes.Length > 20 ? 20 : passwordBytes.Length);index += 20；bytes[index] = (byte)EncryptMode;return bytes;}
}//時間類型
public class EvDateTime
{private const int ConstBytesSize = 6;    //6個字節表示時間public DateTime DateTime {get;set;}public EvDateTime(DateTime dateTime){DateTime = dateTime;}public int BytesSize{get{return ConstBytesSize;}set{;}}public EvDateTime(byte[] bytes, int offset){int year = byte[offset] + 2000;int month = byte[offset + 1];int day = byte[offset + 2];int hour = byte[offset + 3];int miniute = byte[offset + 4];int second = byte[offset + 5];DateTime = new DateTime(year, month, day, hour, miniute, second);}public int WriteToBytes(byte[] bytes, int offset){bytes[offset] = (byte)(DateTime.Year - 2000);bytes[offset + 1] = (byte)DateTime.Month;bytes[offset + 2] = (byte)DateTime.Day;bytes[offset + 3] = (byte)DateTime.Hour;bytes[offset + 4] = (byte)DateTime.Minute;bytes[offset + 5] = (byte)DateTime.Second;return ConstBytesSize;}
}//BitExtend類
public class BitExtend
{public static unsafe void WriteCharToBytes(byte[] bytes, int start, char value){WriteInt16ToBytes(bytes, start, (short)val);}public static unsafe void WriteSingleToBytes(byte[] bytes, int start, float value){WriteInt32ToBytes(bytes, start, *((int*)&value));}public static unsafe void WriteDoubleToBytes(byte[] bytes, int start, double value){WriteInt64ToBytes(bytes, start, *((long*)&value));}public static unsafe void WriteBooleanToBytes(byte[] bytes, int start, boolean value){bytes[start] = value ? (byte)1 : (byte)0;}public static unsafe void WriteUint16ToBytes(byte[] bytes, int start, ushort value){WriteInt16ToBytes(bytes, start, (short)value);}public static unsafe void WriteUint32ToBytes(byte[] bytes, int start, uint value){WriteInt32ToBytes(bytes, start, (short)value);}public static unsafe void WriteUint64ToBytes(byte[] bytes, int start, ulong value){WriteInt64ToBytes(bytes, start, (long)value);}public static unsafe void WriteInt32ToBytes(byte[] bytes, int start, int value){fixed(byte* numRef = bytes){*((int*)(numRef = start)) = value;}}public static unsafe void WriteInt16ToBytes(byte[] bytes, int start, short value){fixed (byte* numRef = bytes){*((short*)(numRef + start)) = value;}}public static unsafe void WriteInt32ToBytes(byte[] bytes, int start, int value){fixed(byte* numRef = bytes){*((int*)(numRef + start)) = value;}}public static unsafe void WriteInt64ToBytes(byte[] bytes, int start, long value){fixed(long* numRef = bytes) {*((long*)(numRef + start)) = value;}}
}//網絡序和本機序
public static class NetBytesUtil
{public static int[] Byte2Bits(byte b){int[] bitArray = new int[8];bitArray[0] = b & 1;bitArray[1] = b & 2;bitArray[2] = b & 4;bitArray[3] = b & 8;bitArray[4] = b & 16;bitArray[5] = b & 32;bitArray[6] = b & 64;bitArray[7] = b & 128;return bitArray;}public static bool TestBit(long src, byte bitIndex){if (src == 0){return false;}else{return ((ulong)src & (ulong)Math.Pow(2, bitIndex)) == (ulong)Math.Pow(2, bitIndex);}}public static long SetBit(long src, byte bitIndex){return src | (long)Math.Pow(2, bitIndex);}public static void EnsureNetOrder(byte[] bytes, int start, int size){if (BitConverter.IsLittleEndian){if (bytes == null){throw new Exception("bytes is null");}if (start < 0){throw new Exception("start less than 0");}if (size < 0){throw new Exception("size less than 0");}if (bytes.Length < start + size){throw new Exception("bytes length less then that start plus size");}if (size > 1){byte tmp;for (int i = 0; i < size / 2; i++){tmp = bytes[start + i];bytes[start + i] = bytes[start + size - 1 - i];bytes[start + size - 1 - i] = tmp;}}}}public static void EnsureHostOrder(byte[] bytes, int start, int size){if (!BitConverter.IsLittleEndian){if (bytes == null){throw new Exception("bytes is null");}if (start < 0){throw new Exception("start less than 0");}if (size < 0){throw new Exception("size less than 0");}if (bytes.Length < start + size){throw new Exception("bytes length less then that start plus size");}if (size > 1){byte tmp;for (int i = 0; i < size / 2; i++){tmp = bytes[start + i];bytes[start + i] = bytes[start + size - 1 - i];bytes[start + size - 1 - i] = tmp;}}}}public static void WriteIp(byte[] bytes, int start, string ip){if (bytes == null){throw new Exception("bytes is null");}if (start < 0){throw new Exception("start less than 0");}if (bytes.Length < start + 4){throw new Exception("bytes length less then that start plus size");}if (string.IsNullOrEmpty(ip)){throw new Exception("ip is null or empty");}string[] array = ip.Split(new char[] { '.' }, StringSplitOptions.RemoveEmptyEntries);if (array.Length != 4){throw new Exception("ip format is error");}bytes[start] = byte.Parse(array[0]);bytes[start + 1] = byte.Parse(array[1]);bytes[start + 2] = byte.Parse(array[2]);bytes[start + 3] = byte.Parse(array[3]);}public static string ReadIp(byte[] bytes, int start){if (bytes == null){throw new Exception("bytes is null");}if (start < 0){throw new Exception("start less than 0");}if (bytes.Length < start + 4){throw new Exception("bytes length less then that start plus size");}return string.Format("{0}.{1}.{2}.{3}", bytes[start], bytes[start + 1], bytes[start + 2], bytes[start + 3]);}[Obsolete]public static void WriteInt16ToBytes(byte[] bytes, int start, short val){if (bytes == null){throw new Exception("bytes is null");}if (start < 0){throw new Exception("start less than 0");}int size = 2;if (bytes.Length < start + size){throw new Exception("bytes length less then that start plus size");}bytes[start] = (byte)(val & 0xff);bytes[start + 1] = (byte)(val >> 8 & 0xff);}[Obsolete]public static void WriteInt32ToBytes(byte[] bytes, int start, int val){if (bytes == null){throw new Exception("bytes is null");}if (start < 0){throw new Exception("start less than 0");}int size = 4;if (bytes.Length < start + size){throw new Exception("bytes length less then that start plus size");}bytes[start] = (byte)(val & 0xff);bytes[start + 1] = (byte)(val >> 8 & 0xff);bytes[start + 2] = (byte)(val >> 16 & 0xff);bytes[start + 3] = (byte)(val >> 24 & 0xff);}[Obsolete]public static void WriteInt64ToBytes(byte[] bytes, int start, long val){if (bytes == null){throw new Exception("bytes is null");}if (start < 0){throw new Exception("start less than 0");}int size = 8;if (bytes.Length < start + size){throw new Exception("bytes length less then that start plus size");}bytes[start] = (byte)(val & 0xff);bytes[start + 1] = (byte)(val >> 8 & 0xff);bytes[start + 2] = (byte)(val >> 16 & 0xff);bytes[start + 3] = (byte)(val >> 24 & 0xff);bytes[start + 4] = (byte)(val >> 32 & 0xff);bytes[start + 5] = (byte)(val >> 40 & 0xff);bytes[start + 6] = (byte)(val >> 48 & 0xff);bytes[start + 7] = (byte)(val >> 56 & 0xff);}[Obsolete]public static void WriteInt64To5Bytes(byte[] bytes, int start, long val){if (bytes == null){throw new Exception("bytes is null");}if (start < 0){throw new Exception("start less than 0");}int size = 5;if (bytes.Length < start + size){throw new Exception("bytes length less then that start plus size");}bytes[start] = (byte)(val & 0xff);bytes[start + 1] = (byte)(val >> 8 & 0xff);bytes[start + 2] = (byte)(val >> 16 & 0xff);bytes[start + 3] = (byte)(val >> 24 & 0xff);bytes[start + 4] = (byte)(val >> 32 & 0xff);//bytes[start + 5] = (byte)(val >> 40 & 0xff);//bytes[start + 6] = (byte)(val >> 48 & 0xff);//bytes[start + 7] = (byte)(val >> 56 & 0xff);
    }[Obsolete]public static void WriteUInt16ToBytes(byte[] bytes, int start, ushort val){if (bytes == null){throw new Exception("bytes is null");}if (start < 0){throw new Exception("start less than 0");}int size = 2;if (bytes.Length < start + size){throw new Exception("bytes length less then that start plus size");}//bytes[start] = (byte)(val & 0x11);//bytes[start + 1] = (byte)((val & 0x1100) >> 8);
bytes[start] = (byte)(0xff & val);bytes[start + 1] = (byte)((0xff00 & val) >> 8);}[Obsolete]public static void WriteUInt32ToBytes(byte[] bytes, int start, uint val){if (bytes == null){throw new Exception("bytes is null");}if (start < 0){throw new Exception("start less than 0");}int size = 4;if (bytes.Length < start + size){throw new Exception("bytes length less then that start plus size");}bytes[start] = (byte)(val & 0xff);bytes[start + 1] = (byte)(val >> 8 & 0xff);bytes[start + 2] = (byte)(val >> 16 & 0xff);bytes[start + 3] = (byte)(val >> 24 & 0xff);}[Obsolete]public static void WriteUInt64ToBytes(byte[] bytes, int start, ulong val){if (bytes == null){throw new Exception("bytes is null");}if (start < 0){throw new Exception("start less than 0");}int size = 8;if (bytes.Length < start + size){throw new Exception("bytes length less then that start plus size");}bytes[start] = (byte)(val & 0xff);bytes[start + 1] = (byte)(val >> 8 & 0xff);bytes[start + 2] = (byte)(val >> 16 & 0xff);bytes[start + 3] = (byte)(val >> 24 & 0xff);bytes[start + 4] = (byte)(val >> 32 & 0xff);bytes[start + 5] = (byte)(val >> 40 & 0xff);bytes[start + 6] = (byte)(val >> 48 & 0xff);bytes[start + 7] = (byte)(val >> 56 & 0xff);}public static int WriteAsc2Bytes(byte[] bytes, int start, string str){if (bytes == null){throw new Exception("bytes is null");}if (start < 0){throw new Exception("start less than 0");}int size = str.Length;if (bytes.Length < start + size){throw new Exception("bytes length less then that start plus size");}for (int i = 0; i < str.Length; i++){try{bytes[start + i] = Convert.ToByte(str[i]);}catch (Exception ex){ExceptionUtil.WriteLog(ex);DebugUtil.WriteLog("錯誤字符" + str[i]);}}return start + size;}
}

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轉載于:https://www.cnblogs.com/mahuanpeng/p/6380101.html

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