[proxmark3-svn] / common / crc16.c

#include "crc16.h"\r
\r
unsigned short update_crc16( unsigned short crc, unsigned char c )\r
{\r
  unsigned short i, v, tcrc = 0;\r
\r
  v = (crc ^ c) & 0xff;\r
  for (i = 0; i < 8; i++) {\r
      tcrc = ( (tcrc ^ v) & 1 ) ? ( tcrc >> 1 ) ^ 0x8408 : tcrc >> 1;\r
      v >>= 1;\r
  }\r
\r
  return ((crc >> 8) ^ tcrc)&0xffff;\r
}\r
Commit	Line	Data
7fe9b0b7	1	#include "crc16.h"\r
0c2ed92d	2	\r
7fe9b0b7	3	unsigned short update_crc16( unsigned short crc, unsigned char c )\r
	4	{\r
	5	unsigned short i, v, tcrc = 0;\r
	6	\r
	7	v = (crc ^ c) & 0xff;\r
0c2ed92d	8	for (i = 0; i < 8; i++) {\r
	9	tcrc = ( (tcrc ^ v) & 1 ) ? ( tcrc >> 1 ) ^ 0x8408 : tcrc >> 1;\r
	10	v >>= 1;\r
	11	}\r
	12	\r
9bea179a	13	return ((crc >> 8) ^ tcrc)&0xffff;\r
0c2ed92d	14	}\r