kernel/2.6.29.6-aldebaran-rt/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
  20 extern u16 const crc16_table[256];
  21
  22 extern u16 crc16(u16 crc, const u8 *buffer, size_t len);
  23
  24 static 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