数据格式转换帮助类

  1     /// <summary>
  2     /// 字节数组转换类，主要实现的均是代码中可能要用到的，未用到的暂时不提供。此类涉及电脑大小端的判断。
  3     /// </summary>
  4     public static class BitConvertHelper
  5     {
  6         public static string ConvertEndpointToIpStr(EndPoint endPoint)
  7         {
  8             var remote = endPoint as IPEndPoint;
  9             if (remote != null)
 10             {
 11                 return remote.Address.ToString();
 12             }
 13             return null;
 14         }
 15 
 16         public static byte[] UInt16ToNetworkBytes(ushort data)
 17         {
 18             return BitConverter.GetBytes(IPAddress.HostToNetworkOrder((short)data));
 19         }
 20 
 21         /// <summary>
 22         /// 将当前的制板时间转换为字节数组，配置模式中有用
 23         /// </summary>
 24         /// <returns></returns>
 25         public static byte[] ConvertDataTimeToBytes(DateTime? dataTime)
 26         {
 27             if (dataTime == null)
 28                 throw new ArgumentNullException("dataTime");
 29 
 30             int year = dataTime.Value.Year - 2000;
 31 
 32             if (year < 0 || year > 125)
 33             {
 34                 return new byte[3];
 35             }
 36 
 37             return new byte[3] { (byte)year, (byte)dataTime.Value.Month, (byte)dataTime.Value.Day };
 38         }
 39 
 40         public static DateTime ConvertBytesToDateTime(byte[] bytes, int start)
 41         {
 42             int year = bytes[start] + 2000;
 43             int month = bytes[start + 1];
 44             int day = bytes[start + 2];
 45             return new DateTime(year, month, day);
 46         }
 47         /// <summary>
 48         /// 将字符串形式的地址转成字节数组
 49         /// </summary>
 50         /// <param name="addr"></param>
 51         /// <param name="seperator"></param>
 52         /// <returns></returns>
 53         public static byte[] ConvertAddrStrToBytes(string addr, char seperator)
 54         {
 55             if (addr == null)
 56                 throw new ArgumentNullException("addr");
 57             var items = addr.Split(seperator);
 58             return items.Select(item => Convert.ToByte(item)).ToArray();
 59         }
 60 
 61         /// <summary>
 62         /// 
 63         /// </summary>
 64         /// <param name="addr"></param>
 65         /// <param name="seperator"></param>
 66         /// <returns></returns>
 67         public static string ConvertToString(IEnumerable<byte> addr, char seperator)
 68         {
 69             var sb = new StringBuilder();
 70             foreach (var a in addr)
 71             {
 72                 sb.Append(a.ToString("X2")).Append(seperator);
 73             }
 74             var str = sb.ToString();
 75             return str.TrimEnd(seperator);
 76         }
 77 
 78         public static string ConvertBytesToStr(byte[] scr, int start, int end, char seperator)
 79         {
 80             var sb = new StringBuilder();
 81             for (int i = start; i < end; i++)
 82             {
 83                 sb.Append(scr[i].ToString("X2")).Append(seperator);
 84             }
 85             var str = sb.ToString();
 86             return str.TrimEnd(seperator);
 87         }
 88 
 89         /// <summary>
 90         ///     Converts a hex string to a byte array.
 91         /// </summary>
 92         /// <param name="hex">The hex string</param>
 93         /// <returns>Array of bytes</returns>
 94         public static byte[] HexToBytes(string hex)
 95         {
 96             if (hex == null)
 97                 throw new ArgumentNullException("hex");
 98 
 99             if (hex.Length % 2 != 0)
100                 throw new FormatException("Hex character count is not even!");
101 
102             var bytes = new byte[hex.Length / 2];
103 
104             for (int i = 0; i < bytes.Length; i++)
105                 bytes[i] = Convert.ToByte(hex.Substring(i * 2, 2), 16);
106 
107             return bytes;
108         }
109 
110         public static byte GetByte(byte[] dataBytes,int offset)
111         {
112             return dataBytes[offset];
113         }
114 
115         public static byte[] GetBytes(byte[] dataBytes, int offset, int length)
116         {
117             var data = new byte[length];
118             Buffer.BlockCopy(dataBytes, offset, data, 0, length);
119             return data;
120 
121             //return dataBytes.Slice(offset, length);   //此方案效率较低
122         }
123 
124         //public static ushort ConvertToUshort(byte[] dataBytes, int offset)
125         //{
126         //    var bytes = TryReverseBytes(GetBytes(dataBytes,offset,2));
127         //    return BitConverter.ToUInt16(bytes, 0);
128         //}
129 
130         public static ushort ConvertToUshort(byte[] dataBytes, int startIndex)
131         {
132             return (ushort)IPAddress.NetworkToHostOrder(BitConverter.ToInt16(dataBytes, startIndex));
133         }
134 
135         public static uint ConvertToUint(byte[] dataBytes, int offset)
136         {
137             var bytes = TryReverseBytes(GetBytes(dataBytes, offset, 4));
138             return BitConverter.ToUInt32(bytes, 0);
139         }
140 
141         /// <summary>
142         /// 某些情况下有效位数可能不是4个字节，但需要转换为uint类型
143         /// </summary>
144         /// <param name="dataBytes"></param>
145         /// <param name="offset"></param>
146         /// <param name="length">要转换为uint的字节个数</param>
147         /// <returns></returns>
148         public static uint ConvertToUint(byte[] dataBytes, int offset, int length)
149         {
150             if (length > 4 || length <= 0)
151             {
152                 throw new ArgumentOutOfRangeException("length");
153             }
154             var bytes = new byte[4];
155             var bytesUsage = GetBytes(dataBytes, offset, length);
156             Buffer.BlockCopy(bytesUsage, 0, bytes, 4 - length, length);
157             bytes = TryReverseBytes(bytes);
158             return BitConverter.ToUInt32(bytes, 0);
159         }
160 
161         public static uint[] NetworkBytesToHostUint32(byte[] networkBytes)
162         {
163             if (networkBytes == null)
164                 throw new ArgumentNullException("networkBytes");
165 
166             if (networkBytes.Length%2 != 0)
167                 throw new FormatException("NetworkBytesNotEven");
168 
169             uint[] result = new uint[networkBytes.Length >> 2];
170 
171             for (int i = 0; i < result.Length; i++)
172                 result[i] = (uint) IPAddress.NetworkToHostOrder(BitConverter.ToInt32(networkBytes, i*4));
173 
174             return result;
175         }
176 
177         /// <summary>
178         /// 将数组中byte数据转换为uint.自己注意start和end的范围，
179         /// </summary>
180         /// <param name="networkBytes"></param>
181         /// <param name="start">包含start，0开始</param>
182         /// <param name="end">不包含end</param>
183         /// <returns></returns>
184         public static uint[] NetworkBytesToHostUint32(byte[] networkBytes, int start, int end)
185         {
186             if (networkBytes == null)
187                 throw new ArgumentNullException("networkBytes");
188 
189             var length = end - start;
190 
191             if (length % 2 != 0)
192                 throw new FormatException("NetworkBytesNotEven");
193 
194             var result = new uint[length >> 2];
195 
196             for (int i = 0; i < result.Length; i++)
197                 result[i] = (uint) IPAddress.NetworkToHostOrder(BitConverter.ToInt32(networkBytes, start + i << 2));
198 
199             return result;
200         }
201 
202         /// <summary>
203         /// 直接将数据写入传入的数组，不再重新申请空间,todo:此函数不是通用函数，是为了数据采集部分方便而编写
204         /// </summary>
205         /// <param name="srcNetworkBytes"></param>
206         /// <param name="srcStart"></param>
207         /// <param name="srcEnd"></param>
208         /// <param name="dstUints"></param>
209         /// <param name="dstStarti"></param>
210         /// <param name="dstStartj"></param>
211         public static void NetworkBytesToUint32Array(byte[] srcNetworkBytes, int srcStart, int srcEnd, uint[,] dstUints,
212             int dstStarti,int dstStartj)
213         {
214             if (srcNetworkBytes == null)
215                 throw new ArgumentNullException("srcNetworkBytes");
216             if (dstUints == null)
217                 throw new ArgumentNullException("dstUints");
218 
219             var length = srcEnd - srcStart;
220 
221             if (length % 2 != 0)
222                 throw new FormatException("NetworkBytesNotEven");
223 
224             for (int i = 0; i < length >> 2; i++)
225                 dstUints[dstStarti,dstStartj + i] =
226                     (uint) IPAddress.NetworkToHostOrder(BitConverter.ToInt32(srcNetworkBytes, srcStart + (i << 2)));
227         }
228 
229 
230         public static int ConvertToInt(byte[] dataBytes, int offset)
231         {
232             var bytes = TryReverseBytes(GetBytes(dataBytes, offset, 4));
233             return BitConverter.ToInt32(bytes, 0);
234         }
235 
236         //public static int ConvertToInt(byte[] dataBytes, int offset, int length)
237         //{
238         //    if (length > 4 || length <= 0)
239         //    {
240         //        throw new ArgumentOutOfRangeException("length");
241         //    }
242         //    var bytes = new byte[4];
243         //    var bytesUsage = GetBytes(dataBytes, offset, length);
244         //    Buffer.BlockCopy(bytesUsage, 0, bytes, 4 - length, length);
245         //    bytes = TryReverseBytes(bytes);
246         //    return BitConverter.ToInt32(bytes, 0);
247         //}
248 
249         public static int ConvertToInt(byte[] dataBytes, int startIndex, int length)
250         {
251             if (length > 4 || length <= 0)
252             {
253                 throw new ArgumentOutOfRangeException("length");
254             }
255             var bytes = new byte[4];
256             Buffer.BlockCopy(GetBytes(dataBytes, startIndex, length), 0, bytes, 4 - length, length);
257             return IPAddress.NetworkToHostOrder(BitConverter.ToInt32(bytes, 0));
258         }
259 
260         public static void BigEndianBlockCopy(uint[,] src, int srcOffset, byte[] dst, int dstOffset, int byteCounts)
261         {
262             //获取要拷贝的uint的个数
263             int uintCount = byteCounts/sizeof (uint);
264             int uintSrcOffset = srcOffset/sizeof (uint);
265             int endSrcOffset = uintCount + uintSrcOffset;
266             var uintBytes = new byte[sizeof(uint)];
267             int uintIndex = 0;
268             int byteIndex = 0;
269 
270             foreach (var u in src)
271             {
272                 if (uintIndex >= uintSrcOffset)
273                 {
274                     CopyBytes(u, 4, uintBytes, 0);
275                     Buffer.BlockCopy(uintBytes, 0, dst, dstOffset + byteIndex, 4);
276                     byteIndex += 4;
277                 }
278                 uintIndex++;
279                 if (uintIndex >= endSrcOffset)
280                 {
281                     break;
282                 }
283             }
284         }
285 
286         public static void CopyBytes(uint value, int bytes, byte[] buffer, int index)
287         {
288             int endOffset = index + bytes - 1;
289             for (int i = 0; i < bytes; i++)
290             {
291                 buffer[endOffset - i] = unchecked((byte) (value & 0xff));
292                 value = value >> 8;
293             }
294         }
295 
296 
297         public static bool IsLittleEndian()
298         {
299             return BitConverter.IsLittleEndian;
300         }
301 
302         /// <summary>
303         /// Attention：将自己翻转
304         /// </summary>
305         /// <param name="bytes"></param>
306         /// <returns></returns>
307         private static byte[] TryReverseBytes(byte[] bytes)
308         {
309             if (IsLittleEndian())
310             {
311                 bytes = ReverseBytes(bytes);
312             }
313             return bytes;
314         }
315 
316         /// <summary>
317         /// 翻转字节数组，数据以大端形式传输，不同的电脑直接顺序不同，可能是小端，因此需要翻转字节数组
318         /// </summary>
319         /// <param name="inArray"></param>
320         /// <returns></returns>
321         public static byte[] ReverseBytes(byte[] inArray)
322         {
323             byte temp;
324             int highCtr = inArray.Length - 1;
325 
326             for (int ctr = 0; ctr < inArray.Length/2; ctr++)
327             {
328                 temp = inArray[ctr];
329                 inArray[ctr] = inArray[highCtr];
330                 inArray[highCtr] = temp;
331                 highCtr -= 1;
332             }
333             return inArray;
334         }
335 
336         public static IEnumerable<T> Slice<T>(this IEnumerable<T> source, int startIndex, int size)
337         {
338             if (source == null)
339                 throw new ArgumentNullException("source");
340             var enumerable = source as T[] ?? source.ToArray();
341             int num = enumerable.Count();
342             if (startIndex < 0 || num < startIndex)
343                 throw new ArgumentOutOfRangeException("startIndex");
344             if (size < 0 || startIndex + size > num)
345                 throw new ArgumentOutOfRangeException("size");
346 
347             return enumerable.Skip(startIndex).Take(size);
348         }
349 
350         public static T[] Slice<T>(this T[] source, int startIndex, int size)
351         {
352             if (source == null)
353                 throw new ArgumentNullException("source");
354             int num = source.Count();
355             if (startIndex < 0 || num < startIndex)
356                 throw new ArgumentOutOfRangeException("startIndex");
357             if (size < 0 || startIndex + size > num)
358                 throw new ArgumentOutOfRangeException("size");
359 
360             return source.Skip(startIndex).Take(size).ToArray();
361         }
362     }