| Greg Kroah-Hartman | b244131 | 2017-11-01 15:07:57 +0100 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | #ifndef _LINUX_CRC_CCITT_H |
| 3 | #define _LINUX_CRC_CCITT_H |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | |
| 5 | #include <linux/types.h> |
| 6 | |
| 7 | extern u16 const crc_ccitt_table[256]; |
| Andrew Morton | 0d85adb | 2018-01-03 15:39:58 -0800 | [diff] [blame] | 8 | extern u16 const crc_ccitt_false_table[256]; |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | |
| 10 | extern u16 crc_ccitt(u16 crc, const u8 *buffer, size_t len); |
| Andrew Morton | 0d85adb | 2018-01-03 15:39:58 -0800 | [diff] [blame] | 11 | extern u16 crc_ccitt_false(u16 crc, const u8 *buffer, size_t len); |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | |
| 13 | static inline u16 crc_ccitt_byte(u16 crc, const u8 c) |
| 14 | { |
| 15 | return (crc >> 8) ^ crc_ccitt_table[(crc ^ c) & 0xff]; |
| 16 | } |
| 17 | |
| Andrew Morton | 0d85adb | 2018-01-03 15:39:58 -0800 | [diff] [blame] | 18 | static inline u16 crc_ccitt_false_byte(u16 crc, const u8 c) |
| 19 | { |
| 20 | return (crc << 8) ^ crc_ccitt_false_table[(crc >> 8) ^ c]; |
| 21 | } |
| 22 | |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | #endif /* _LINUX_CRC_CCITT_H */ |