| /* |
| * crc-itu-t.h - CRC ITU-T V.41 routine |
| * |
| * Implements the standard CRC ITU-T V.41: |
| * Width 16 |
| * Poly 0x0x1021 (x^16 + x^12 + x^15 + 1) |
| * Init 0 |
| * |
| * This source code is licensed under the GNU General Public License, |
| * Version 2. See the file COPYING for more details. |
| */ |
| |
| #ifndef CRC_ITU_T_H |
| #define CRC_ITU_T_H |
| |
| #include <linux/types.h> |
| |
| extern u16 const crc_itu_t_table[256]; |
| |
| extern u16 crc_itu_t(u16 crc, const u8 *buffer, size_t len); |
| |
| static inline u16 crc_itu_t_byte(u16 crc, const u8 data) |
| { |
| return (crc << 8) ^ crc_itu_t_table[((crc >> 8) ^ data) & 0xff]; |
| } |
| |
| #endif /* CRC_ITU_T_H */ |
| |