57 lines
1.8 KiB
C
57 lines
1.8 KiB
C
/*
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* crc8gen.h
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*
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* Copyright (C) 2011 Sylvain Munaut <tnt@246tNt.com>
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*
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* All Rights Reserved
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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 along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#pragma once
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/*! \addtogroup crcgen
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* @{
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*/
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/*! \file crc8gen.h
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* Osmocom generic CRC routines (for max 8 bits poly) header
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*/
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#include <stdint.h>
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#include <osmocom/core/bits.h>
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/*! \brief structure describing a given CRC code of max 8 bits */
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struct osmo_crc8gen_code {
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int bits; /*!< \brief Actual number of bits of the CRC */
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uint8_t poly; /*!< \brief Polynom (normal representation, MSB omitted */
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uint8_t init; /*!< \brief Initialization value of the CRC state */
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uint8_t remainder; /*!< \brief Remainder of the CRC (final XOR) */
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};
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uint8_t osmo_crc8gen_compute_bits(const struct osmo_crc8gen_code *code,
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const ubit_t *in, int len);
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int osmo_crc8gen_check_bits(const struct osmo_crc8gen_code *code,
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const ubit_t *in, int len, const ubit_t *crc_bits);
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void osmo_crc8gen_set_bits(const struct osmo_crc8gen_code *code,
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const ubit_t *in, int len, ubit_t *crc_bits);
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/*! @} */
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/* vim: set syntax=c: */
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