mirror of
https://github.com/zephyrproject-rtos/zephyr
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cc334c7273
Convert code to use u{8,16,32,64}_t and s{8,16,32,64}_t instead of C99
integer types. This handles the remaining includes and kernel, plus
touching up various points that we skipped because of include
dependancies. We also convert the PRI printf formatters in the arch
code over to normal formatters.
Jira: ZEP-2051
Change-Id: Iecbb12601a3ee4ea936fd7ddea37788a645b08b0
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
67 lines
1.5 KiB
C
67 lines
1.5 KiB
C
/*
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* Copyright (c) 2017 Intel Corporation.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/** @file
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* @brief CRC 16 computation function
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*/
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#ifndef __CRC16_H
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#define __CRC16_H
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#include <zephyr/types.h>
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#include <stddef.h>
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/**
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* @brief Generic function for computing CRC 16
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*
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* Compute CRC 16 by passing in the address of the input, the input length
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* and polynomial used in addition to the initial value.
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*
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* @param src Input bytes for the computation
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* @param len Length of the input in bytes
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* @param polynomial The polynomial to use omitting the leading x^16
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* coefficient
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* @param initial_value Initial value for the CRC computation
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*
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* @return The computed CRC16 value
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*/
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u16_t crc16(const u8_t *src, size_t len, u16_t polynomial,
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u16_t initial_value);
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/**
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* @brief Compute CCITT variant of CRC 16
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*
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* CCITT variant of CRC 16 is using 0x1021 as its polynomial with the initial
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* value set to 0xffff.
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*
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* @param src Input bytes for the computation
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* @param len Length of the input in bytes
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*
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* @return The computed CRC16 value
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*/
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static inline u16_t crc16_ccitt(const u8_t *src, size_t len)
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{
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return crc16(src, len, 0x1021, 0xffff);
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}
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/**
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* @brief Compute ANSI variant of CRC 16
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*
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* ANSI variant of CRC 16 is using 0x8005 as its polynomial with the initial
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* value set to 0xffff.
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*
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* @param src Input bytes for the computation
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* @param len Length of the input in bytes
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*
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* @return The computed CRC16 value
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*/
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static inline u16_t crc16_ansi(const u8_t *src, size_t len)
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{
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return crc16(src, len, 0x8005, 0xffff);
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}
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#endif
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