libosmocore
0.9.3
Osmocom core library
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00001 /* 00002 * This was copied from the linux kernel and adjusted for our types. 00003 */ 00004 /* 00005 * crc16.h - CRC-16 routine 00006 * 00007 * Implements the standard CRC-16: 00008 * Width 16 00009 * Poly 0x8005 (x^16 + x^15 + x^2 + 1) 00010 * Init 0 00011 * 00012 * Copyright (c) 2005 Ben Gardner <bgardner@wabtec.com> 00013 * 00014 * This source code is licensed under the GNU General Public License, 00015 * Version 2. See the file COPYING for more details. 00016 */ 00017 00018 #pragma once 00019 00020 #include <stdint.h> 00021 00022 #include <sys/types.h> 00023 00024 extern uint16_t const osmo_crc16_table[256]; 00025 00026 extern uint16_t osmo_crc16(uint16_t crc, const uint8_t *buffer, size_t len); 00027 00028 static inline uint16_t osmo_crc16_byte(uint16_t crc, const uint8_t data) 00029 { 00030 return (crc >> 8) ^ osmo_crc16_table[(crc ^ data) & 0xff]; 00031 }