Merge branch 'cfq-2.6.33' into for-2.6.33
[linux-2.6/next.git] / include / linux / crc-itu-t.h
blob84920f3cc83e0d843885117f145c7dcb301f1489
1 /*
2 * crc-itu-t.h - CRC ITU-T V.41 routine
4 * Implements the standard CRC ITU-T V.41:
5 * Width 16
6 * Poly 0x0x1021 (x^16 + x^12 + x^15 + 1)
7 * Init 0
9 * This source code is licensed under the GNU General Public License,
10 * Version 2. See the file COPYING for more details.
13 #ifndef CRC_ITU_T_H
14 #define CRC_ITU_T_H
16 #include <linux/types.h>
18 extern u16 const crc_itu_t_table[256];
20 extern u16 crc_itu_t(u16 crc, const u8 *buffer, size_t len);
22 static inline u16 crc_itu_t_byte(u16 crc, const u8 data)
24 return (crc << 8) ^ crc_itu_t_table[((crc >> 8) ^ data) & 0xff];
27 #endif /* CRC_ITU_T_H */