对象字节流转换
Posted yyjackma
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数据表示时间 长度（字节） 数据类型 描述及要求
平台登入时间 6 BYTE[6] （每个字节分别代表：年、月、日、时、分、秒）
登入流水号 2 WORD 每登入一次，登入流水号自动加1
平台用户名 12 STRING 平台登入用户名
平台密码 20 STRING 平台登入密码
加密规则 1 BYTE 0x01:数据不加密；0x02:RSA加密；0x03:AES128加密...
//平台登入类 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; } } //时间类型 public class EvDateTime { private const int ConstBytesSize = 6; //6个字节表示时间 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类 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; } } } //网络序和本机序 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("错误字符" + str[i]); } } return start + size; } }
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