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git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blob - include/linux/crc-itu-t.h
1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * crc-itu-t.h - CRC ITU-T V.41 routine
5 * Implements the standard CRC ITU-T V.41:
7 * Poly 0x1021 (x^16 + x^12 + x^15 + 1)
14 #include <linux/types.h>
16 extern u16
const crc_itu_t_table
[256];
18 extern u16
crc_itu_t(u16 crc
, const u8
*buffer
, size_t len
);
20 static inline u16
crc_itu_t_byte(u16 crc
, const u8 data
)
22 return (crc
<< 8) ^ crc_itu_t_table
[((crc
>> 8) ^ data
) & 0xff];
25 #endif /* CRC_ITU_T_H */