patch-2.1.132 linux/include/net/irda/crc.h

• Lines: 31
• Date: Thu Dec 17 09:01:03 1998
• Orig file: v2.1.131/linux/include/net/irda/crc.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.131/linux/include/net/irda/crc.h linux/include/net/irda/crc.h
@@ -0,0 +1,30 @@
+/*********************************************************************
+ *                
+ * 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:   Sat Dec 12 23:09:29 1998
+ * Modified by:   Dag Brattli <dagb@cs.uit.no>
+ * 
+ ********************************************************************/
+
+#ifndef IR_CRC_H
+#define IR_CRC_H
+
+#include <linux/types.h>
+
+#define INIT_FCS  0xffff   /* Initial FCS value */
+#define GOOD_FCS  0xf0b8   /* Good final FCS value */
+
+/* Recompute the FCS with one more character appended. */
+#define IR_FCS(fcs, byte) (((fcs)>>8)^irda_crc16_table[((fcs)^(byte)) & 0xff])
+
+/* Recompute the FCS with len bytes appended. */
+unsigned short crc_calc( __u16 fcs, __u8 const *buf, size_t len);
+
+extern __u16 const irda_crc16_table[];
+
+#endif