[proxmark3-svn] / common / crc16.c

unsigned short update_crc16( unsigned short crc, unsigned char c ) {\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
a99c6a19	1	unsigned short update_crc16( unsigned short crc, unsigned char c ) {\r
a99c6a19	2	unsigned short i, v, tcrc = 0;\r
0c2ed92d	3	\r
	4	v = (crc ^ c) & 0xff;\r
	5	for (i = 0; i < 8; i++) {\r
	6	tcrc = ( (tcrc ^ v) & 1 ) ? ( tcrc >> 1 ) ^ 0x8408 : tcrc >> 1;\r
	7	v >>= 1;\r
	8	}\r
	9	\r
9bea179a	10	return ((crc >> 8) ^ tcrc)&0xffff;\r
0c2ed92d	11	}\r