crc.h
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- /*********************************************************************
- *
- * Filename: crc.h
- * Version:
- * Description: CRC routines
- * Status: Experimental.
- * Author: Dag Brattli <dagb@cs.uit.no>
- * Created at: Mon Aug 4 20:40:53 1997
- * Modified at: Sun May 2 20:25:23 1999
- * Modified by: Dag Brattli <dagb@cs.uit.no>
- *
- ********************************************************************/
- #ifndef IRDA_CRC_H
- #define IRDA_CRC_H
- #include <linux/types.h>
- #define INIT_FCS 0xffff /* Initial FCS value */
- #define GOOD_FCS 0xf0b8 /* Good final FCS value */
- extern __u16 const irda_crc16_table[];
- /* Recompute the FCS with one more character appended. */
- static inline __u16 irda_fcs(__u16 fcs, __u8 c)
- {
- return (((fcs) >> 8) ^ irda_crc16_table[((fcs) ^ (c)) & 0xff]);
- }
- /* Recompute the FCS with len bytes appended. */
- unsigned short crc_calc( __u16 fcs, __u8 const *buf, size_t len);
- #endif