LXR linux/include/linux/crc16.h

   1/*
   2 *      crc16.h - CRC-16 routine
   3 *
   4 * Implements the standard CRC-16:
   5 *   Width 16
   6 *   Poly  0x8005 (x^16 + x^15 + x^2 + 1)
   7 *   Init  0
   8 *
   9 * Copyright (c) 2005 Ben Gardner <bgardner@wabtec.com>
  10 *
  11 * This source code is licensed under the GNU General Public License,
  12 * Version 2. See the file COPYING for more details.
  13 */
  14
  15#ifndef __CRC16_H
  16#define __CRC16_H
  17
  18#include <linux/types.h>
  19
  20extern u16 const crc16_table[256];
  21
  22extern u16 crc16(u16 crc, const u8 *buffer, size_t len);
  23
  24static inline u16 crc16_byte(u16 crc, const u8 data)
  25{
  26        return (crc >> 8) ^ crc16_table[(crc ^ data) & 0xff];
  27}
  28
  29#endif /* __CRC16_H */
  30
  31