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783 lines
31 KiB
783 lines
31 KiB
3 months ago
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//------------------------------------------------------------------------------
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// 此代码版权（除特别声明或在XREF结尾的命名空间的代码）归作者本人若汝棋茗所有
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// 源代码使用协议遵循本仓库的开源协议及附加协议，若本仓库没有设置，则按MIT开源协议授权
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// CSDN博客：https://blog.csdn.net/qq_40374647
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// 哔哩哔哩视频：https://space.bilibili.com/94253567
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// Gitee源代码仓库：https://gitee.com/RRQM_Home
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// Github源代码仓库：https://github.com/RRQM
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// API首页：https://www.yuque.com/rrqm/touchsocket/index
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// 交流QQ群：234762506
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// 感谢您的下载和使用
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//------------------------------------------------------------------------------
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//------------------------------------------------------------------------------
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using System;
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namespace TouchSocket.Core
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{
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/// <summary>
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/// Crc相关。
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/// <para>该代码来源于网络</para>
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/// </summary>
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public static class Crc
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{
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/// **********************************************************************
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/// Name: CRC-4/ITU x4+x+1
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/// Poly: 0x03
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/// Init: 0x00
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/// Refin: true
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/// Refout: true
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/// Xorout: 0x00
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///*************************************************************************
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public static byte[] Crc1(byte[] buffer, int start = 0, int len = 0)
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{
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if (buffer == null || buffer.Length == 0) return null;
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if (start < 0) return null;
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if (len == 0) len = buffer.Length - start;
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int length = start + len;
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if (length > buffer.Length) return null;
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byte crc = 0;// Initial value
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for (int i = start; i < length; i++)
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{
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crc ^= buffer[i];
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for (int j = 0; j < 8; j++)
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{
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if ((crc & 1) > 0)
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crc = (byte)((crc >> 1) ^ 0x0C);//0x0C = (reverse 0x03)>>(8-4)
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else
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crc = (byte)(crc >> 1);
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}
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}
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return new byte[] { crc };
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}
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/// **********************************************************************
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/// Name: CRC-5/EPC x5+x3+1
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/// Poly: 0x09
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/// Init: 0x09
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/// Refin: false
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/// Refout: false
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/// Xorout: 0x00
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///*************************************************************************
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public static byte[] Crc2(byte[] buffer, int start = 0, int len = 0)
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{
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if (buffer == null || buffer.Length == 0) return null;
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if (start < 0) return null;
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if (len == 0) len = buffer.Length - start;
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int length = start + len;
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if (length > buffer.Length) return null;
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byte crc = 0x48;// Initial value: 0x48 = 0x09<<(8-5)
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for (int i = start; i < length; i++)
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{
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crc ^= buffer[i];
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for (int j = 0; j < 8; j++)
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{
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if ((crc & 0x80) > 0)
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crc = (byte)((crc << 1) ^ 0x48);// 0x48 = 0x09<<(8-5)
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else
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crc = (byte)(crc << 1);
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}
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}
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return new byte[] { (byte)(crc >> 3) };
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}
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/// **********************************************************************
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/// Name: CRC-5/ITU x5+x4+x2+1
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/// Poly: 0x15
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/// Init: 0x00
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/// Refin: true
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/// Refout: true
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/// Xorout: 0x00
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///*************************************************************************
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public static byte[] Crc3(byte[] buffer, int start = 0, int len = 0)
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{
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if (buffer == null || buffer.Length == 0) return null;
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if (start < 0) return null;
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if (len == 0) len = buffer.Length - start;
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int length = start + len;
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if (length > buffer.Length) return null;
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byte crc = 0;// Initial value
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for (int i = start; i < length; i++)
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{
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crc ^= buffer[i];
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for (int j = 0; j < 8; j++)
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{
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if ((crc & 1) > 0)
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crc = (byte)((crc >> 1) ^ 0x15);// 0x15 = (reverse 0x15)>>(8-5)
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else
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crc = (byte)(crc >> 1);
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}
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}
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return new byte[] { crc };
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}
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/// **********************************************************************
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/// Name: CRC-5/USB x5+x2+1
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/// Poly: 0x05
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/// Init: 0x1F
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/// Refin: true
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/// Refout: true
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/// Xorout: 0x1F
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///*************************************************************************
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public static byte[] Crc4(byte[] buffer, int start = 0, int len = 0)
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{
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if (buffer == null || buffer.Length == 0) return null;
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if (start < 0) return null;
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if (len == 0) len = buffer.Length - start;
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int length = start + len;
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if (length > buffer.Length) return null;
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byte crc = 0x1F;// Initial value
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for (int i = start; i < length; i++)
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{
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crc ^= buffer[i];
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for (int j = 0; j < 8; j++)
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{
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if ((crc & 1) > 0)
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crc = (byte)((crc >> 1) ^ 0x14);// 0x14 = (reverse 0x05)>>(8-5)
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else
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crc = (byte)(crc >> 1);
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}
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}
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return new byte[] { (byte)(crc ^ 0x1F) };
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}
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/// **********************************************************************
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/// Name: CRC-6/ITU x6+x+1
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/// Poly: 0x03
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/// Init: 0x00
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/// Refin: true
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/// Refout: true
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/// Xorout: 0x00
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///*************************************************************************
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public static byte[] Crc5(byte[] buffer, int start = 0, int len = 0)
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{
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if (buffer == null || buffer.Length == 0) return null;
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if (start < 0) return null;
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if (len == 0) len = buffer.Length - start;
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int length = start + len;
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if (length > buffer.Length) return null;
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byte crc = 0;// Initial value
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for (int i = start; i < length; i++)
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{
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crc ^= buffer[i];
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for (int j = 0; j < 8; j++)
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{
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if ((crc & 1) > 0)
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crc = (byte)((crc >> 1) ^ 0x30);// 0x30 = (reverse 0x03)>>(8-6)
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else
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crc = (byte)(crc >> 1);
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}
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}
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return new byte[] { crc };
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}
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/// **********************************************************************
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/// Name: CRC-7/MMC x7+x3+1
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/// Poly: 0x09
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/// Init: 0x00
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/// Refin: false
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/// Refout: false
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/// Xorout: 0x00
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///*************************************************************************
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public static byte[] Crc6(byte[] buffer, int start = 0, int len = 0)
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{
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if (buffer == null || buffer.Length == 0) return null;
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if (start < 0) return null;
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if (len == 0) len = buffer.Length - start;
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int length = start + len;
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if (length > buffer.Length) return null;
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byte crc = 0;// Initial value
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for (int i = start; i < length; i++)
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{
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crc ^= buffer[i];
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for (int j = 0; j < 8; j++)
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{
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if ((crc & 0x80) > 0)
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crc = (byte)((crc << 1) ^ 0x12);// 0x12 = 0x09<<(8-7)
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else
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crc = (byte)(crc << 1);
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}
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}
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return new byte[] { (byte)(crc >> 1) };
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}
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/// **********************************************************************
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/// Name: CRC8 x8+x2+x+1
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/// Poly: 0x07
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/// Init: 0x00
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/// Refin: false
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/// Refout: false
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/// Xorout: 0x00
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///*************************************************************************
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public static byte[] Crc7(byte[] buffer, int start = 0, int len = 0)
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{
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if (buffer == null || buffer.Length == 0) return null;
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if (start < 0) return null;
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if (len == 0) len = buffer.Length - start;
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int length = start + len;
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if (length > buffer.Length) return null;
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byte crc = 0;// Initial value
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for (int i = start; i < length; i++)
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{
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crc ^= buffer[i];
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for (int j = 0; j < 8; j++)
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{
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if ((crc & 0x80) > 0)
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crc = (byte)((crc << 1) ^ 0x07);
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else
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crc = (byte)(crc << 1);
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}
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}
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return new byte[] { crc };
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}
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/// **********************************************************************
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/// Name: CRC-8/ITU x8+x2+x+1
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/// Poly: 0x07
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/// Init: 0x00
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/// Refin: false
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/// Refout: false
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/// Xorout: 0x55
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///*************************************************************************
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public static byte[] Crc8(byte[] buffer, int start = 0, int len = 0)
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{
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if (buffer == null || buffer.Length == 0) return null;
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if (start < 0) return null;
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if (len == 0) len = buffer.Length - start;
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int length = start + len;
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if (length > buffer.Length) return null;
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byte crc = 0;// Initial value
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for (int i = start; i < length; i++)
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{
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crc ^= buffer[i];
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for (int j = 0; j < 8; j++)
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{
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if ((crc & 0x80) > 0)
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crc = (byte)((crc << 1) ^ 0x07);
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else
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crc = (byte)(crc << 1);
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}
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}
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return new byte[] { (byte)(crc ^ 0x55) };
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}
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/// **********************************************************************
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/// Name: CRC-8/MAXIM x8+x5+x4+1
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/// Poly: 0x31
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/// Init: 0x00
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/// Refin: true
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/// Refout: true
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/// Xorout: 0x00
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///*************************************************************************
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public static byte[] Crc9(byte[] buffer, int start = 0, int len = 0)
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{
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if (buffer == null || buffer.Length == 0) return null;
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if (start < 0) return null;
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if (len == 0) len = buffer.Length - start;
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int length = start + len;
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if (length > buffer.Length) return null;
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byte crc = 0;// Initial value
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for (int i = start; i < length; i++)
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{
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crc ^= buffer[i];
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for (int j = 0; j < 8; j++)
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{
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if ((crc & 1) > 0)
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crc = (byte)((crc >> 1) ^ 0x8C);// 0x8C = reverse 0x31
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else
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crc = (byte)(crc >> 1);
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}
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}
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return new byte[] { crc };
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}
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/// **********************************************************************
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/// Name: CRC-8/ROHC x8+x2+x+1
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/// Poly: 0x07
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/// Init: 0xFF
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/// Refin: true
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/// Refout: true
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/// Xorout: 0x00
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///*************************************************************************
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public static byte[] Crc10(byte[] buffer, int start = 0, int len = 0)
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{
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if (buffer == null || buffer.Length == 0) return null;
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if (start < 0) return null;
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if (len == 0) len = buffer.Length - start;
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int length = start + len;
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if (length > buffer.Length) return null;
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byte crc = 0xFF;// Initial value
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for (int i = start; i < length; i++)
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{
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crc ^= buffer[i];
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for (int j = 0; j < 8; j++)
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{
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if ((crc & 1) > 0)
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crc = (byte)((crc >> 1) ^ 0xE0);// 0xE0 = reverse 0x07
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else
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crc = (byte)(crc >> 1);
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}
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}
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return new byte[] { crc };
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}
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/// Z1协议校验码计算
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private static readonly byte[] table = { 0x00, 0x1C, 0x38, 0x24, 0x70, 0x6C, 0x48, 0x54, 0xE0, 0xFC,
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0xD8, 0xC4, 0x90, 0x8C, 0xA8, 0xB4, 0xDC, 0xC0, 0xE4, 0xF8,
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0xAC, 0xB0, 0x94, 0x88, 0x3C, 0x20, 0x04, 0x18, 0x4C, 0x50,
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0x74, 0x68, 0xA4, 0xB8, 0x9C, 0x80, 0xD4, 0xC8, 0xEC, 0xF0,
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0x44, 0x58, 0x7C, 0x60, 0x34, 0x28, 0x0C, 0x10, 0x78, 0x64,
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0x40, 0x5C, 0x08, 0x14, 0x30, 0x2C, 0x98, 0x84, 0xA0, 0xBC,
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0xE8, 0xF4, 0xD0, 0xCC, 0x54, 0x48, 0x6C, 0x70, 0x24, 0x38,
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0x1C, 0x00, 0xB4, 0xA8, 0x8C, 0x90, 0xC4, 0xD8, 0xFC, 0xE0,
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0x88, 0x94, 0xB0, 0xAC, 0xF8, 0xE4, 0xC0, 0xDC, 0x68, 0x74,
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0x50, 0x4C, 0x18, 0x04, 0x20, 0x3C, 0xF0, 0xEC, 0xC8, 0xD4,
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0x80, 0x9C, 0xB8, 0xA4, 0x10, 0x0C, 0x28, 0x34, 0x60, 0x7C,
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0x58, 0x44, 0x2C, 0x30, 0x14, 0x08, 0x5C, 0x40, 0x64, 0x78,
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0xCC, 0xD0, 0xF4, 0xE8, 0xBC, 0xA0, 0x84, 0x98, 0xA8, 0xB4,
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0x90, 0x8C, 0xD8, 0xC4, 0xE0, 0xFC, 0x48, 0x54, 0x70, 0x6C,
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0x38, 0x24, 0x00, 0x1C, 0x74, 0x68, 0x4C, 0x50, 0x04, 0x18,
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||
|
|
0x3C, 0x20, 0x94, 0x88, 0xAC, 0xB0, 0xE4, 0xF8, 0xDC, 0xC0,
|
||
|
|
0x0C, 0x10, 0x34, 0x28, 0x7C, 0x60, 0x44, 0x58, 0xEC, 0xF0,
|
||
|
|
0xD4, 0xC8, 0x9C, 0x80, 0xA4, 0xB8, 0xD0, 0xCC, 0xE8, 0xF4,
|
||
|
|
0xA0, 0xBC, 0x98, 0x84, 0x30, 0x2C, 0x08, 0x14, 0x40, 0x5C,
|
||
|
|
0x78, 0x64, 0xFC, 0xE0, 0xC4, 0xD8, 0x8C, 0x90, 0xB4, 0xA8,
|
||
|
|
0x1C, 0x00, 0x24, 0x38, 0x6C, 0x70, 0x54, 0x48, 0x20, 0x3C,
|
||
|
|
0x18, 0x04, 0x50, 0x4C, 0x68, 0x74, 0xC0, 0xDC, 0xF8, 0xE4,
|
||
|
|
0xB0, 0xAC, 0x88, 0x94, 0x58, 0x44, 0x60, 0x7C, 0x28, 0x34,
|
||
|
|
0x10, 0x0C, 0xB8, 0xA4, 0x80, 0x9C, 0xC8, 0xD4, 0xF0, 0xEC,
|
||
|
|
0x84, 0x98, 0xBC, 0xA0, 0xF4, 0xE8, 0xCC, 0xD0, 0x64, 0x78,
|
||
|
|
0x5C, 0x40, 0x14, 0x08, 0x2C, 0x30
|
||
|
|
};
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Crc11
|
||
|
|
/// </summary>
|
||
|
|
/// <param name="buffer"></param>
|
||
|
|
/// <param name="start"></param>
|
||
|
|
/// <param name="len"></param>
|
||
|
|
/// <returns></returns>
|
||
|
|
public static byte[] Crc11(byte[] buffer, int start = 0, int len = 0)
|
||
|
|
{
|
||
|
|
if (buffer == null || buffer.Length == 0) return null;
|
||
|
|
if (start < 0) return null;
|
||
|
|
if (len == 0) len = buffer.Length - start;
|
||
|
|
int length = start + len;
|
||
|
|
if (length > buffer.Length) return null;
|
||
|
|
int i;
|
||
|
|
byte crc = 0x00;
|
||
|
|
int tableIndex;
|
||
|
|
for (i = start; i < length; i++)
|
||
|
|
{
|
||
|
|
tableIndex = crc ^ (buffer[i] & 0xFF);
|
||
|
|
crc = table[tableIndex];
|
||
|
|
}
|
||
|
|
return new byte[] { crc };
|
||
|
|
}
|
||
|
|
|
||
|
|
/// **********************************************************************
|
||
|
|
/// Name: CRC-12 x16+x12+x5+1
|
||
|
|
/// Poly: 0x80
|
||
|
|
/// Init: 0x0000
|
||
|
|
/// Refin: true
|
||
|
|
/// Refout: true
|
||
|
|
/// Xorout: 0x0000
|
||
|
|
///*************************************************************************
|
||
|
|
public static byte[] Crc12(byte[] buffer, int start = 0, int len = 0)
|
||
|
|
{
|
||
|
|
if (buffer == null || buffer.Length == 0) return null;
|
||
|
|
if (start < 0) return null;
|
||
|
|
if (len == 0) len = buffer.Length - start;
|
||
|
|
int length = start + len;
|
||
|
|
if (length > buffer.Length) return null;
|
||
|
|
ushort crc = 0;// Initial value
|
||
|
|
short iQ = 0, iR = 0;
|
||
|
|
for (int i = start; i < length; i++)
|
||
|
|
{
|
||
|
|
// 多项式除法
|
||
|
|
// 如果该位为1
|
||
|
|
if ((buffer[i] & (0x80 >> iR)) > 0)
|
||
|
|
{
|
||
|
|
// 则在余数尾部添1否则添0
|
||
|
|
crc |= 0x01;
|
||
|
|
}
|
||
|
|
// 如果12位除数中的最高位为1，则够除
|
||
|
|
if (crc >= 0x1000)
|
||
|
|
{
|
||
|
|
crc ^= 0x180D;
|
||
|
|
}
|
||
|
|
crc <<= 1;
|
||
|
|
iR++;
|
||
|
|
if (8 == iR)
|
||
|
|
{
|
||
|
|
iR = 0;
|
||
|
|
iQ++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
// 对后面添加的12个0做处理
|
||
|
|
for (int i = 0; i < 12; i++)
|
||
|
|
{
|
||
|
|
if (crc >= 0x1000)
|
||
|
|
{
|
||
|
|
crc ^= 0x180D;
|
||
|
|
}
|
||
|
|
crc <<= 1;
|
||
|
|
}
|
||
|
|
crc >>= 1;
|
||
|
|
byte[] ret = BitConverter.GetBytes(crc);
|
||
|
|
Array.Reverse(ret);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
/// **********************************************************************
|
||
|
|
/// Name: CRC-16/CCITT x16+x12+x5+1
|
||
|
|
/// Poly: 0x1021
|
||
|
|
/// Init: 0x0000
|
||
|
|
/// Refin: true
|
||
|
|
/// Refout: true
|
||
|
|
/// Xorout: 0x0000
|
||
|
|
///*************************************************************************
|
||
|
|
public static byte[] Crc13(byte[] buffer, int start = 0, int len = 0)
|
||
|
|
{
|
||
|
|
if (buffer == null || buffer.Length == 0) return null;
|
||
|
|
if (start < 0) return null;
|
||
|
|
if (len == 0) len = buffer.Length - start;
|
||
|
|
int length = start + len;
|
||
|
|
if (length > buffer.Length) return null;
|
||
|
|
ushort crc = 0;// Initial value
|
||
|
|
for (int i = start; i < length; i++)
|
||
|
|
{
|
||
|
|
crc ^= buffer[i];
|
||
|
|
for (int j = 0; j < 8; j++)
|
||
|
|
{
|
||
|
|
if ((crc & 1) > 0)
|
||
|
|
crc = (ushort)((crc >> 1) ^ 0x8408);// 0x8408 = reverse 0x1021
|
||
|
|
else
|
||
|
|
crc = (ushort)(crc >> 1);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
byte[] ret = BitConverter.GetBytes(crc);
|
||
|
|
Array.Reverse(ret);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
/// **********************************************************************
|
||
|
|
/// Name: CRC-16/CCITT FALSE x16+x12+x5+1
|
||
|
|
/// Poly: 0x1021
|
||
|
|
/// Init: 0xFFFF
|
||
|
|
/// Refin: false
|
||
|
|
/// Refout: false
|
||
|
|
/// Xorout: 0x0000
|
||
|
|
///*************************************************************************
|
||
|
|
public static byte[] Crc14(byte[] buffer, int start = 0, int len = 0)
|
||
|
|
{
|
||
|
|
if (buffer == null || buffer.Length == 0) return null;
|
||
|
|
if (start < 0) return null;
|
||
|
|
if (len == 0) len = buffer.Length - start;
|
||
|
|
int length = start + len;
|
||
|
|
if (length > buffer.Length) return null;
|
||
|
|
ushort crc = 0xFFFF;// Initial value
|
||
|
|
for (int i = start; i < length; i++)
|
||
|
|
{
|
||
|
|
crc ^= (ushort)(buffer[i] << 8);
|
||
|
|
for (int j = 0; j < 8; j++)
|
||
|
|
{
|
||
|
|
if ((crc & 0x8000) > 0)
|
||
|
|
crc = (ushort)((crc << 1) ^ 0x1021);
|
||
|
|
else
|
||
|
|
crc = (ushort)(crc << 1);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
byte[] ret = BitConverter.GetBytes(crc);
|
||
|
|
Array.Reverse(ret);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
/// **********************************************************************
|
||
|
|
/// Name: CRC-16/DNP x16+x13+x12+x11+x10+x8+x6+x5+x2+1
|
||
|
|
/// Poly: 0x3D65
|
||
|
|
/// Init: 0x0000
|
||
|
|
/// Refin: true
|
||
|
|
/// Refout: true
|
||
|
|
/// Xorout: 0xFFFF
|
||
|
|
///*************************************************************************
|
||
|
|
public static byte[] Crc15(byte[] buffer, int start = 0, int len = 0)
|
||
|
|
{
|
||
|
|
if (buffer == null || buffer.Length == 0) return null;
|
||
|
|
if (start < 0) return null;
|
||
|
|
if (len == 0) len = buffer.Length - start;
|
||
|
|
int length = start + len;
|
||
|
|
if (length > buffer.Length) return null;
|
||
|
|
ushort crc = 0;// Initial value
|
||
|
|
for (int i = start; i < length; i++)
|
||
|
|
{
|
||
|
|
crc ^= buffer[i];
|
||
|
|
for (int j = 0; j < 8; j++)
|
||
|
|
{
|
||
|
|
if ((crc & 1) > 0)
|
||
|
|
crc = (ushort)((crc >> 1) ^ 0xA6BC);// 0xA6BC = reverse 0x3D65
|
||
|
|
else
|
||
|
|
crc = (ushort)(crc >> 1);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
byte[] ret = BitConverter.GetBytes((ushort)~crc);
|
||
|
|
Array.Reverse(ret);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
/// **********************************************************************
|
||
|
|
/// Name: CRC-16/IBM x16+x15+x2+1
|
||
|
|
/// Poly: 0x8005
|
||
|
|
/// Init: 0x0000
|
||
|
|
/// Refin: true
|
||
|
|
/// Refout: true
|
||
|
|
/// Xorout: 0x0000
|
||
|
|
///*************************************************************************
|
||
|
|
public static byte[] Crc16(byte[] buffer, int start = 0, int len = 0)
|
||
|
|
{
|
||
|
|
if (buffer == null || buffer.Length == 0) return null;
|
||
|
|
if (start < 0) return null;
|
||
|
|
if (len == 0) len = buffer.Length - start;
|
||
|
|
int length = start + len;
|
||
|
|
if (length > buffer.Length) return null;
|
||
|
|
ushort crc = 0;// Initial value
|
||
|
|
for (int i = start; i < length; i++)
|
||
|
|
{
|
||
|
|
crc ^= buffer[i];
|
||
|
|
for (int j = 0; j < 8; j++)
|
||
|
|
{
|
||
|
|
if ((crc & 1) > 0)
|
||
|
|
crc = (ushort)((crc >> 1) ^ 0xA001);// 0xA001 = reverse 0x8005
|
||
|
|
else
|
||
|
|
crc = (ushort)(crc >> 1);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
byte[] ret = BitConverter.GetBytes(crc);
|
||
|
|
Array.Reverse(ret);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
/// **********************************************************************
|
||
|
|
/// Name: CRC-16/MAXIM x16+x15+x2+1
|
||
|
|
/// Poly: 0x8005
|
||
|
|
/// Init: 0x0000
|
||
|
|
/// Refin: true
|
||
|
|
/// Refout: true
|
||
|
|
/// Xorout: 0xFFFF
|
||
|
|
///*************************************************************************
|
||
|
|
public static byte[] Crc17(byte[] buffer, int start = 0, int len = 0)
|
||
|
|
{
|
||
|
|
if (buffer == null || buffer.Length == 0) return null;
|
||
|
|
if (start < 0) return null;
|
||
|
|
if (len == 0) len = buffer.Length - start;
|
||
|
|
int length = start + len;
|
||
|
|
if (length > buffer.Length) return null;
|
||
|
|
ushort crc = 0;// Initial value
|
||
|
|
for (int i = start; i < length; i++)
|
||
|
|
{
|
||
|
|
crc ^= buffer[i];
|
||
|
|
for (int j = 0; j < 8; j++)
|
||
|
|
{
|
||
|
|
if ((crc & 1) > 0)
|
||
|
|
crc = (ushort)((crc >> 1) ^ 0xA001);// 0xA001 = reverse 0x8005
|
||
|
|
else
|
||
|
|
crc = (ushort)(crc >> 1);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
byte[] ret = BitConverter.GetBytes((ushort)~crc);
|
||
|
|
Array.Reverse(ret);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
/// **********************************************************************
|
||
|
|
/// Name: CRC-16/MODBUS x16+x15+x2+1
|
||
|
|
/// Poly: 0x8005
|
||
|
|
/// Init: 0xFFFF
|
||
|
|
/// Refin: true
|
||
|
|
/// Refout: true
|
||
|
|
/// Xorout: 0x0000
|
||
|
|
///*************************************************************************
|
||
|
|
public static byte[] Crc18(byte[] buffer, int start = 0, int len = 0)
|
||
|
|
{
|
||
|
|
if (buffer == null || buffer.Length == 0) return null;
|
||
|
|
if (start < 0) return null;
|
||
|
|
if (len == 0) len = buffer.Length - start;
|
||
|
|
int length = start + len;
|
||
|
|
if (length > buffer.Length) return null;
|
||
|
|
ushort crc = 0xFFFF;// Initial value
|
||
|
|
for (int i = start; i < length; i++)
|
||
|
|
{
|
||
|
|
crc ^= buffer[i];
|
||
|
|
for (int j = 0; j < 8; j++)
|
||
|
|
{
|
||
|
|
if ((crc & 1) > 0)
|
||
|
|
crc = (ushort)((crc >> 1) ^ 0xA001);// 0xA001 = reverse 0x8005
|
||
|
|
else
|
||
|
|
crc = (ushort)(crc >> 1);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
byte[] ret = BitConverter.GetBytes(crc);
|
||
|
|
Array.Reverse(ret);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
/// **********************************************************************
|
||
|
|
/// Name: CRC-16/USB x16+x15+x2+1
|
||
|
|
/// Poly: 0x8005
|
||
|
|
/// Init: 0xFFFF
|
||
|
|
/// Refin: true
|
||
|
|
/// Refout: true
|
||
|
|
/// Xorout: 0xFFFF
|
||
|
|
///*************************************************************************
|
||
|
|
public static byte[] Crc19(byte[] buffer, int start = 0, int len = 0)
|
||
|
|
{
|
||
|
|
if (buffer == null || buffer.Length == 0) return null;
|
||
|
|
if (start < 0) return null;
|
||
|
|
if (len == 0) len = buffer.Length - start;
|
||
|
|
int length = start + len;
|
||
|
|
if (length > buffer.Length) return null;
|
||
|
|
ushort crc = 0xFFFF;// Initial value
|
||
|
|
for (int i = start; i < length; i++)
|
||
|
|
{
|
||
|
|
crc ^= buffer[i];
|
||
|
|
for (int j = 0; j < 8; j++)
|
||
|
|
{
|
||
|
|
if ((crc & 1) > 0)
|
||
|
|
crc = (ushort)((crc >> 1) ^ 0xA001);// 0xA001 = reverse 0x8005
|
||
|
|
else
|
||
|
|
crc = (ushort)(crc >> 1);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
byte[] ret = BitConverter.GetBytes((ushort)~crc);
|
||
|
|
Array.Reverse(ret);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
/// **********************************************************************
|
||
|
|
/// Name: CRC-16/X25 x16+x12+x5+1
|
||
|
|
/// Poly: 0x1021
|
||
|
|
/// Init: 0xFFFF
|
||
|
|
/// Refin: true
|
||
|
|
/// Refout: true
|
||
|
|
/// Xorout: 0xFFFF
|
||
|
|
///*************************************************************************
|
||
|
|
public static byte[] Crc20(byte[] buffer, int start = 0, int len = 0)
|
||
|
|
{
|
||
|
|
if (buffer == null || buffer.Length == 0) return null;
|
||
|
|
if (start < 0) return null;
|
||
|
|
if (len == 0) len = buffer.Length - start;
|
||
|
|
int length = start + len;
|
||
|
|
if (length > buffer.Length) return null;
|
||
|
|
ushort crc = 0xFFFF;// Initial value
|
||
|
|
for (int i = start; i < length; i++)
|
||
|
|
{
|
||
|
|
crc ^= buffer[i];
|
||
|
|
for (int j = 0; j < 8; j++)
|
||
|
|
{
|
||
|
|
if ((crc & 1) > 0)
|
||
|
|
crc = (ushort)((crc >> 1) ^ 0x8408);// 0x8408 = reverse 0x1021
|
||
|
|
else
|
||
|
|
crc = (ushort)(crc >> 1);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
byte[] ret = BitConverter.GetBytes((ushort)~crc);
|
||
|
|
Array.Reverse(ret);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
/// **********************************************************************
|
||
|
|
/// Name: CRC-16/XMODEM x16+x12+x5+1
|
||
|
|
/// Poly: 0x1021
|
||
|
|
/// Init: 0x0000
|
||
|
|
/// Refin: false
|
||
|
|
/// Refout: false
|
||
|
|
/// Xorout: 0x0000
|
||
|
|
///*************************************************************************
|
||
|
|
public static byte[] Crc21(byte[] buffer, int start = 0, int len = 0)
|
||
|
|
{
|
||
|
|
if (buffer == null || buffer.Length == 0) return null;
|
||
|
|
if (start < 0) return null;
|
||
|
|
if (len == 0) len = buffer.Length - start;
|
||
|
|
int length = start + len;
|
||
|
|
if (length > buffer.Length) return null;
|
||
|
|
ushort crc = 0;// Initial value
|
||
|
|
for (int i = start; i < length; i++)
|
||
|
|
{
|
||
|
|
crc ^= (ushort)(buffer[i] << 8);
|
||
|
|
for (int j = 0; j < 8; j++)
|
||
|
|
{
|
||
|
|
if ((crc & 0x8000) > 0)
|
||
|
|
crc = (ushort)((crc << 1) ^ 0x1021);
|
||
|
|
else
|
||
|
|
crc = (ushort)(crc << 1);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
byte[] ret = BitConverter.GetBytes(crc);
|
||
|
|
Array.Reverse(ret);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
/// **********************************************************************
|
||
|
|
/// Name: CRC32 x32+x26+x23+x22+x16+x12+x11+x10+x8+x7+x5+x4+x2+x+1
|
||
|
|
/// Poly: 0x04C11DB7
|
||
|
|
/// Init: 0xFFFFFFFF
|
||
|
|
/// Refin: true
|
||
|
|
/// Refout: true
|
||
|
|
/// Xorout: 0xFFFFFFFF
|
||
|
|
///*************************************************************************
|
||
|
|
public static byte[] Crc22(byte[] buffer, int start = 0, int len = 0)
|
||
|
|
{
|
||
|
|
if (buffer == null || buffer.Length == 0) return null;
|
||
|
|
if (start < 0) return null;
|
||
|
|
if (len == 0) len = buffer.Length - start;
|
||
|
|
int length = start + len;
|
||
|
|
if (length > buffer.Length) return null;
|
||
|
|
uint crc = 0xFFFFFFFF;// Initial value
|
||
|
|
for (int i = start; i < length; i++)
|
||
|
|
{
|
||
|
|
crc ^= buffer[i];
|
||
|
|
for (int j = 0; j < 8; j++)
|
||
|
|
{
|
||
|
|
if ((crc & 1) > 0)
|
||
|
|
crc = (crc >> 1) ^ 0xEDB88320;// 0xEDB88320= reverse 0x04C11DB7
|
||
|
|
else
|
||
|
|
crc = crc >> 1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
byte[] ret = BitConverter.GetBytes(~crc);
|
||
|
|
Array.Reverse(ret);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
/// **********************************************************************
|
||
|
|
/// Name: CRC32/MPEG-2 x32+x26+x23+x22+x16+x12+x11+x10+x8+x7+x5+x4+x2+x+1
|
||
|
|
/// Poly: 0x04C11DB7
|
||
|
|
/// Init: 0xFFFFFFFF
|
||
|
|
/// Refin: false
|
||
|
|
/// Refout: false
|
||
|
|
/// Xorout: 0x00000000
|
||
|
|
///*************************************************************************
|
||
|
|
public static byte[] Crc23(byte[] buffer, int start = 0, int len = 0)
|
||
|
|
{
|
||
|
|
if (buffer == null || buffer.Length == 0) return null;
|
||
|
|
if (start < 0) return null;
|
||
|
|
if (len == 0) len = buffer.Length - start;
|
||
|
|
int length = start + len;
|
||
|
|
if (length > buffer.Length) return null;
|
||
|
|
uint crc = 0xFFFFFFFF;// Initial value
|
||
|
|
for (int i = start; i < length; i++)
|
||
|
|
{
|
||
|
|
crc ^= (uint)(buffer[i] << 24);
|
||
|
|
for (int j = 0; j < 8; j++)
|
||
|
|
{
|
||
|
|
if ((crc & 0x80000000) > 0)
|
||
|
|
crc = (crc << 1) ^ 0x04C11DB7;
|
||
|
|
else
|
||
|
|
crc = crc << 1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
byte[] ret = BitConverter.GetBytes(crc);
|
||
|
|
Array.Reverse(ret);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|