crc.h

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/*
 * Copyright (c) 2018 Workaround GmbH.
 * Copyright (c) 2017 Intel Corporation.
 * Copyright (c) 2017 Nordic Semiconductor ASA
 * Copyright (c) 2015 Runtime Inc
 * Copyright (c) 2018 Google LLC.
 *
 * SPDX-License-Identifier: Apache-2.0
 */
#ifndef ZEPHYR_INCLUDE_SYS_CRC_H_
#define ZEPHYR_INCLUDE_SYS_CRC_H_
 
#include <zephyr/types.h>
#include <stdbool.h>
#include <stddef.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
/* Initial value expected to be used at the beginning of the crc8_ccitt
 * computation.
 */
#define CRC8_CCITT_INITIAL_VALUE 0xFF
 
uint16_t crc16(const uint8_t *src, size_t len, uint16_t polynomial,
            uint16_t initial_value, bool pad);
 
uint8_t crc8(const uint8_t *src, size_t len, uint8_t polynomial, uint8_t initial_value,
          bool reversed);
 
uint16_t crc16_ccitt(uint16_t seed, const uint8_t *src, size_t len);
 
uint16_t crc16_itu_t(uint16_t seed, const uint8_t *src, size_t len);
 
static inline uint16_t crc16_ansi(const uint8_t *src, size_t len)
{
        return crc16(src, len, 0x8005, 0xffff, true);
}
 
uint32_t crc32_ieee(const uint8_t *data, size_t len);
 
uint32_t crc32_ieee_update(uint32_t crc, const uint8_t *data, size_t len);
 
uint32_t crc32_c(uint32_t crc, const uint8_t *data,
                 size_t len, bool first_pkt, bool last_pkt);
 
uint8_t crc8_ccitt(uint8_t initial_value, const void *buf, size_t len);
 
uint8_t crc7_be(uint8_t seed, const uint8_t *src, size_t len);
 
#ifdef __cplusplus
}
#endif
 
#endif