libosmocore 1.13.1.1-afb4 Osmocom core library

crc8gen.h
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1
3/*
4 * Copyright (C) 2011 Sylvain Munaut <tnt@246tNt.com>
5 *
6 * All Rights Reserved
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 */
18
19#pragma once
20
25#include <stdint.h>
26#include <osmocom/core/bits.h>
27
28
30 struct osmo_crc8gen_code {
31 int bits;
32 uint8_t poly;
33 uint8_t init;
34 uint8_t remainder;
35};
36
37uint8_t osmo_crc8gen_compute_bits(const struct osmo_crc8gen_code *code,
38 const ubit_t *in, int len);
39 int osmo_crc8gen_check_bits(const struct osmo_crc8gen_code *code,
40 const ubit_t *in, int len, const ubit_t *crc_bits);
41 void osmo_crc8gen_set_bits(const struct osmo_crc8gen_code *code,
42 const ubit_t *in, int len, ubit_t *crc_bits);
43
44
47/* vim: set syntax=c: */
bits.h
Osmocom bit level support code.
ubit_t
uint8_t ubit_t
unpacked bit (0 or 1): 1 bit per byte
Definition: bits.h:24
len
static size_t len(const char *str)
osmo_crc8gen_compute_bits
uint8_t osmo_crc8gen_compute_bits(const struct osmo_crc8gen_code *code, const ubit_t *in, int len)
Compute the CRC value of a given array of hard-bits.
Definition: crc8gen.c:40
osmo_crc8gen_check_bits
int osmo_crc8gen_check_bits(const struct osmo_crc8gen_code *code, const ubit_t *in, int len, const ubit_t *crc_bits)
Checks the CRC value of a given array of hard-bits.
Definition: crc8gen.c:75
osmo_crc8gen_set_bits
void osmo_crc8gen_set_bits(const struct osmo_crc8gen_code *code, const ubit_t *in, int len, ubit_t *crc_bits)
Computes and writes the CRC value of a given array of bits.
Definition: crc8gen.c:100
osmo_crc8gen_code
structure describing a given CRC code of max 8 bits
Definition: crc8gen.h:30
osmo_crc8gen_code::poly
uint8_t poly
Polynom (normal representation, MSB omitted.
Definition: crc8gen.h:32
osmo_crc8gen_code::bits
int bits
Actual number of bits of the CRC.
Definition: crc8gen.h:31
osmo_crc8gen_code::init
uint8_t init
Initialization value of the CRC state.
Definition: crc8gen.h:33
osmo_crc8gen_code::remainder
uint8_t remainder
Remainder of the CRC (final XOR)
Definition: crc8gen.h:34