libosmocore  0.9.6-10.20170220git32ee5af8.fc31
Osmocom core library
crc8gen.h
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1 /*
2  * crc8gen.h
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  * You should have received a copy of the GNU General Public License along
19  * with this program; if not, write to the Free Software Foundation, Inc.,
20  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
21  */
22 
23 #pragma once
24 
34 #include <stdint.h>
35 #include <osmocom/core/bits.h>
36 
37 
40  int bits;
41  uint8_t poly;
42  uint8_t init;
43  uint8_t remainder;
44 };
45 
46 uint8_t osmo_crc8gen_compute_bits(const struct osmo_crc8gen_code *code,
47  const ubit_t *in, int len);
48 int osmo_crc8gen_check_bits(const struct osmo_crc8gen_code *code,
49  const ubit_t *in, int len, const ubit_t *crc_bits);
50 void osmo_crc8gen_set_bits(const struct osmo_crc8gen_code *code,
51  const ubit_t *in, int len, ubit_t *crc_bits);
52 
53 
56 /* vim: set syntax=c: */
int bits
Actual number of bits of the CRC.
Definition: crc8gen.h:40
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:81
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:46
uint8_t init
Initialization value of the CRC state.
Definition: crc8gen.h:42
uint8_t remainder
Remainder of the CRC (final XOR)
Definition: crc8gen.h:43
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:106
Osmocom bit level support code.
structure describing a given CRC code of max 8 bits
Definition: crc8gen.h:39
uint8_t ubit_t
unpacked bit (0 or 1)
Definition: bits.h:23
uint8_t poly
Polynom (normal representation, MSB omitted.
Definition: crc8gen.h:41