| Ingo Albrecht | 383134b | 2010-07-15 22:43:52 +0200 | [diff] [blame] | 1 | /* |
| 2 | * This was copied from the linux kernel and adjusted for our types. |
| 3 | */ |
| 4 | /* |
| 5 | * crc16.h - CRC-16 routine |
| 6 | * |
| 7 | * Implements the standard CRC-16: |
| 8 | * Width 16 |
| 9 | * Poly 0x8005 (x^16 + x^15 + x^2 + 1) |
| 10 | * Init 0 |
| 11 | * |
| 12 | * Copyright (c) 2005 Ben Gardner <bgardner@wabtec.com> |
| 13 | * |
| 14 | * This source code is licensed under the GNU General Public License, |
| 15 | * Version 2. See the file COPYING for more details. |
| 16 | */ |
| 17 | |
| 18 | #ifndef __CRC16_H |
| 19 | #define __CRC16_H |
| 20 | |
| 21 | #include <stdint.h> |
| 22 | |
| 23 | #include <sys/types.h> |
| 24 | |
| 25 | extern uint16_t const crc16_table[256]; |
| 26 | |
| 27 | extern uint16_t crc16(uint16_t crc, const uint8_t *buffer, size_t len); |
| 28 | |
| 29 | static inline uint16_t crc16_byte(uint16_t crc, const uint8_t data) |
| 30 | { |
| 31 | return (crc >> 8) ^ crc16_table[(crc ^ data) & 0xff]; |
| 32 | } |
| 33 | |
| 34 | #endif /* __CRC16_H */ |