root/include/linux/crc-ccitt.h

INCLUDED FROM

DEFINITIONS

1. crc_ccitt_byte
2. crc_ccitt_false_byte

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _LINUX_CRC_CCITT_H
   3 #define _LINUX_CRC_CCITT_H
   4 
   5 #include <linux/types.h>
   6 
   7 extern u16 const crc_ccitt_table[256];
   8 extern u16 const crc_ccitt_false_table[256];
   9 
  10 extern u16 crc_ccitt(u16 crc, const u8 *buffer, size_t len);
  11 extern u16 crc_ccitt_false(u16 crc, const u8 *buffer, size_t len);
  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 
  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 
  23 #endif /* _LINUX_CRC_CCITT_H */