libosmocore  1.10.0.2-2e788.202408152026
Osmocom core library
crc16.h
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1 
7 /*
8  * crc16.h - CRC-16 routine
9  *
10  * Implements the standard CRC-16:
11  * - Width 16
12  * - Poly 0x8005 (x^16 + x^15 + x^2 + 1)
13  * - Init 0
14  *
15  * Copyright (c) 2005 Ben Gardner <bgardner@wabtec.com>
16  *
17  * This source code is licensed under the GNU General Public License,
18  * Version 2. See the file COPYING for more details.
19  */
20 
21 #pragma once
22 
23 #include <stdint.h>
24 
25 #include <sys/types.h>
26 
27 extern uint16_t const osmo_crc16_table[256];
28 
29 extern uint16_t osmo_crc16(uint16_t crc, const uint8_t *buffer, size_t len);
30 
32 static inline uint16_t osmo_crc16_byte(uint16_t crc, const uint8_t data)
33 {
34  return (crc >> 8) ^ osmo_crc16_table[(crc ^ data) & 0xff];
35 }
36 
37 
38 
39 extern uint16_t const osmo_crc16_ccitt_table[256];
40 
41 extern uint16_t osmo_crc16_ccitt(uint16_t crc, const uint8_t *buffer, size_t len);
42 
44 static inline uint16_t osmo_crc16_ccitt_byte(uint16_t crc, const uint8_t data)
45 {
46  return (crc >> 8) ^ osmo_crc16_ccitt_table[(crc ^ data) & 0xff];
47 }
48 
static size_t len(const char *str)
static uint16_t osmo_crc16_byte(uint16_t crc, const uint8_t data)
CRC-16 polynome 0x8005 (x^16 + x^15 + x^2 + 1)
Definition: crc16.h:32
uint16_t const osmo_crc16_table[256]
CRC table for the CRC-16.
Definition: crc16.c:18
uint16_t osmo_crc16(uint16_t crc, const uint8_t *buffer, size_t len)
Compute 16bit CCITT polynome 0x8408 (x^0 + x^5 + x^12) over given buffer.
Definition: crc16.c:59
uint16_t osmo_crc16_ccitt(uint16_t crc, const uint8_t *buffer, size_t len)
Compute 16bit CCITT polynome 0x8408 (x^0 + x^5 + x^12) over given buffer.
Definition: crc16.c:108
uint16_t const osmo_crc16_ccitt_table[256]
CRC table for the CCITT CRC-6.
Definition: crc16.c:67
static uint16_t osmo_crc16_ccitt_byte(uint16_t crc, const uint8_t data)
CCITT polynome 0x8408 (x^0 + x^5 + x^12)
Definition: crc16.h:44
uint8_t data[0]