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97 lines
3.7 KiB
97 lines
3.7 KiB
/**
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* Digital Voice Modem - Host Software
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* GPLv2 Open Source. Use is subject to license terms.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* @package DVM / Host Software
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*
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*/
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//
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// Based on code from the MMDVMHost project. (https://github.com/g4klx/MMDVMHost)
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// Licensed under the GPLv2 License (https://opensource.org/licenses/GPL-2.0)
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//
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/*
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* Copyright (C) 2015,2016 by Jonathan Naylor G4KLX
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* Copyright (C) 2018 by Bryan Biedenkapp N2PLL
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#if !defined(__CRC_H__)
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#define __CRC_H__
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#include "Defines.h"
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namespace edac
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{
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// ---------------------------------------------------------------------------
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// Class Declaration
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// Implements various Cyclic Redundancy Check routines.
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// ---------------------------------------------------------------------------
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class HOST_SW_API CRC {
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public:
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/// <summary>Check 5-bit CRC.</summary>
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static bool checkFiveBit(bool* in, uint32_t tcrc);
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/// <summary>Encode 5-bit CRC.</summary>
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static void encodeFiveBit(const bool* in, uint32_t& tcrc);
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/// <summary>Check 16-bit CRC-CCITT.</summary>
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static bool checkCCITT162(const uint8_t* in, uint32_t length);
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/// <summary>Encode 16-bit CRC-CCITT.</summary>
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static void addCCITT162(uint8_t* in, uint32_t length);
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/// <summary>Check 16-bit CRC-CCITT.</summary>
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static bool checkCCITT161(const uint8_t* in, uint32_t length);
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/// <summary>Encode 16-bit CRC-CCITT.</summary>
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static void addCCITT161(uint8_t* in, uint32_t length);
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/// <summary>Check 32-bit CRC.</summary>
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static bool checkCRC32(const uint8_t* in, uint32_t length);
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/// <summary>Encode 32-bit CRC.</summary>
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static void addCRC32(uint8_t* in, uint32_t length);
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/// <summary>Generate 8-bit CRC.</summary>
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static uint8_t crc8(const uint8_t* in, uint32_t length);
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/// <summary>Generate 9-bit CRC.</summary>
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static uint16_t crc9(const uint8_t* in, uint32_t bitLength);
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/// <summary>Check 6-bit CRC.</summary>
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static bool checkCRC6(const uint8_t* in, uint32_t length);
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/// <summary>Encode 6-bit CRC.</summary>
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static void addCRC6(uint8_t* in, uint32_t length);
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/// <summary>Check 12-bit CRC.</summary>
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static bool checkCRC12(const uint8_t* in, uint32_t length);
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/// <summary>Encode 12-bit CRC.</summary>
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static void addCRC12(uint8_t* in, uint32_t length);
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/// <summary>Check 15-bit CRC.</summary>
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static bool checkCRC15(const uint8_t* in, uint32_t length);
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/// <summary>Encode 15-bit CRC.</summary>
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static void addCRC15(uint8_t* in, uint32_t length);
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private:
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/// <summary></summary>
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static uint8_t createCRC6(const uint8_t* in, uint32_t length);
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/// <summary></summary>
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static uint16_t createCRC12(const uint8_t* in, uint32_t length);
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/// <summary></summary>
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static uint16_t createCRC15(const uint8_t* in, uint32_t length);
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};
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} // namespace edac
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#endif // __CRC_H__
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