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783 lines
31 KiB
783 lines
31 KiB
//------------------------------------------------------------------------------ |
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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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|
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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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/// ********************************************************************** |
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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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/// ********************************************************************** |
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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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/// ********************************************************************** |
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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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/// ********************************************************************** |
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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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/// ********************************************************************** |
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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, |
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0x0C, 0x10, 0x34, 0x28, 0x7C, 0x60, 0x44, 0x58, 0xEC, 0xF0, |
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0xD4, 0xC8, 0x9C, 0x80, 0xA4, 0xB8, 0xD0, 0xCC, 0xE8, 0xF4, |
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0xA0, 0xBC, 0x98, 0x84, 0x30, 0x2C, 0x08, 0x14, 0x40, 0x5C, |
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0x78, 0x64, 0xFC, 0xE0, 0xC4, 0xD8, 0x8C, 0x90, 0xB4, 0xA8, |
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0x1C, 0x00, 0x24, 0x38, 0x6C, 0x70, 0x54, 0x48, 0x20, 0x3C, |
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0x18, 0x04, 0x50, 0x4C, 0x68, 0x74, 0xC0, 0xDC, 0xF8, 0xE4, |
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0xB0, 0xAC, 0x88, 0x94, 0x58, 0x44, 0x60, 0x7C, 0x28, 0x34, |
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0x10, 0x0C, 0xB8, 0xA4, 0x80, 0x9C, 0xC8, 0xD4, 0xF0, 0xEC, |
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0x84, 0x98, 0xBC, 0xA0, 0xF4, 0xE8, 0xCC, 0xD0, 0x64, 0x78, |
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0x5C, 0x40, 0x14, 0x08, 0x2C, 0x30 |
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}; |
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/// <summary> |
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/// Crc11 |
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/// </summary> |
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/// <param name="buffer"></param> |
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/// <param name="start"></param> |
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/// <param name="len"></param> |
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/// <returns></returns> |
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public static byte[] Crc11(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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int i; |
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byte crc = 0x00; |
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int tableIndex; |
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for (i = start; i < length; i++) |
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{ |
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tableIndex = crc ^ (buffer[i] & 0xFF); |
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crc = table[tableIndex]; |
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} |
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return new byte[] { crc }; |
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} |
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|
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/// ********************************************************************** |
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/// Name: CRC-12 x16+x12+x5+1 |
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/// Poly: 0x80 |
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/// Init: 0x0000 |
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/// Refin: true |
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/// Refout: true |
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/// Xorout: 0x0000 |
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///************************************************************************* |
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public static byte[] Crc12(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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ushort crc = 0;// Initial value |
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short iQ = 0, iR = 0; |
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for (int i = start; i < length; i++) |
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{ |
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// 多项式除法 |
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// 如果该位为1 |
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if ((buffer[i] & (0x80 >> iR)) > 0) |
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{ |
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// 则在余数尾部添1否则添0 |
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crc |= 0x01; |
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} |
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// 如果12位除数中的最高位为1，则够除 |
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if (crc >= 0x1000) |
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{ |
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crc ^= 0x180D; |
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} |
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crc <<= 1; |
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iR++; |
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if (8 == iR) |
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{ |
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iR = 0; |
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iQ++; |
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} |
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} |
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// 对后面添加的12个0做处理 |
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for (int i = 0; i < 12; i++) |
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{ |
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if (crc >= 0x1000) |
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{ |
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crc ^= 0x180D; |
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} |
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crc <<= 1; |
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} |
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crc >>= 1; |
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byte[] ret = BitConverter.GetBytes(crc); |
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Array.Reverse(ret); |
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return ret; |
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} |
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|
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/// ********************************************************************** |
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/// Name: CRC-16/CCITT x16+x12+x5+1 |
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/// Poly: 0x1021 |
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/// Init: 0x0000 |
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/// Refin: true |
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/// Refout: true |
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/// Xorout: 0x0000 |
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///************************************************************************* |
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public static byte[] Crc13(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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ushort 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 = (ushort)((crc >> 1) ^ 0x8408);// 0x8408 = reverse 0x1021 |
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else |
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crc = (ushort)(crc >> 1); |
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} |
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} |
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byte[] ret = BitConverter.GetBytes(crc); |
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Array.Reverse(ret); |
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return ret; |
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} |
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|
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/// ********************************************************************** |
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/// Name: CRC-16/CCITT FALSE x16+x12+x5+1 |
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/// Poly: 0x1021 |
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/// Init: 0xFFFF |
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/// Refin: false |
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/// Refout: false |
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/// Xorout: 0x0000 |
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///************************************************************************* |
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public static byte[] Crc14(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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ushort crc = 0xFFFF;// Initial value |
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for (int i = start; i < length; i++) |
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{ |
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crc ^= (ushort)(buffer[i] << 8); |
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for (int j = 0; j < 8; j++) |
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{ |
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if ((crc & 0x8000) > 0) |
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crc = (ushort)((crc << 1) ^ 0x1021); |
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else |
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crc = (ushort)(crc << 1); |
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} |
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} |
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byte[] ret = BitConverter.GetBytes(crc); |
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Array.Reverse(ret); |
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return ret; |
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} |
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|
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/// ********************************************************************** |
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/// Name: CRC-16/DNP x16+x13+x12+x11+x10+x8+x6+x5+x2+1 |
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/// Poly: 0x3D65 |
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/// Init: 0x0000 |
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/// Refin: true |
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/// Refout: true |
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/// Xorout: 0xFFFF |
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///************************************************************************* |
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public static byte[] Crc15(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; |
|
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; |
|
} |
|
} |
|
} |