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Syping 2020-10-25 02:56:19 +02:00
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libcrc-2.0/include/checksum.h Normal file
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/*
* Library: libcrc
* File: include/checksum.h
* Author: Lammert Bies
*
* This file is licensed under the MIT License as stated below
*
* Copyright (c) 1999-2016 Lammert Bies
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Description
* -----------
* The headerfile include/checksum.h contains the definitions and prototypes
* for routines that can be used to calculate several kinds of checksums.
*/
#ifndef DEF_LIBCRC_CHECKSUM_H
#define DEF_LIBCRC_CHECKSUM_H
#include <stdint.h>
#include <stdio.h>
/*
* #define CRC_POLY_xxxx
*
* The constants of the form CRC_POLY_xxxx define the polynomials for some well
* known CRC calculations.
*/
#define CRC_POLY_16 0xA001
#define CRC_POLY_32 0xEDB88320L
#define CRC_POLY_CCITT 0x1021
#define CRC_POLY_DNP 0xA6BC
#define CRC_POLY_KERMIT 0x8408
#define CRC_POLY_SICK 0x8005
/*
* #define CRC_START_xxxx
*
* The constants of the form CRC_START_xxxx define the values that are used for
* initialization of a CRC value for common used calculation methods.
*/
#define CRC_START_8 0x00
#define CRC_START_16 0x0000
#define CRC_START_MODBUS 0xFFFF
#define CRC_START_XMODEM 0x0000
#define CRC_START_CCITT_1D0F 0x1D0F
#define CRC_START_CCITT_FFFF 0xFFFF
#define CRC_START_KERMIT 0x0000
#define CRC_START_SICK 0x0000
#define CRC_START_DNP 0x0000
#define CRC_START_32 0xFFFFFFFFL
/*
* Prototype list of global functions
*/
unsigned char * checksum_NMEA( const unsigned char *input_str, unsigned char *result );
uint8_t crc_8( const unsigned char *input_str, size_t num_bytes );
uint16_t crc_16( const unsigned char *input_str, size_t num_bytes );
uint32_t crc_32( const unsigned char *input_str, size_t num_bytes );
uint16_t crc_ccitt_1d0f( const unsigned char *input_str, size_t num_bytes );
uint16_t crc_ccitt_ffff( const unsigned char *input_str, size_t num_bytes );
uint16_t crc_dnp( const unsigned char *input_str, size_t num_bytes );
uint16_t crc_kermit( const unsigned char *input_str, size_t num_bytes );
uint16_t crc_modbus( const unsigned char *input_str, size_t num_bytes );
uint16_t crc_sick( const unsigned char *input_str, size_t num_bytes );
uint16_t crc_xmodem( const unsigned char *input_str, size_t num_bytes );
uint8_t update_crc_8( uint8_t crc, unsigned char c );
uint16_t update_crc_16( uint16_t crc, unsigned char c );
uint32_t update_crc_32( uint32_t crc, unsigned char c );
uint16_t update_crc_ccitt( uint16_t crc, unsigned char c );
uint16_t update_crc_dnp( uint16_t crc, unsigned char c );
uint16_t update_crc_kermit( uint16_t crc, unsigned char c );
uint16_t update_crc_sick( uint16_t crc, unsigned char c, unsigned char prev_byte );
#endif // DEF_LIBCRC_CHECKSUM_H