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//usr/src/linux-headers-5.10.108-0510108/include/linux/crc-itu-t.h
/* SPDX-License-Identifier: GPL-2.0-only */ /* * crc-itu-t.h - CRC ITU-T V.41 routine * * Implements the standard CRC ITU-T V.41: * Width 16 * Poly 0x1021 (x^16 + x^12 + x^15 + 1) * Init 0 */ #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 */