X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/9bea179a71188589f8e642f615177a108cea8d55..3b33bda694bcd22e2ceb8c9ff052f8fd4b81e3e8:/common/crc16.c diff --git a/common/crc16.c b/common/crc16.c index 1497ecf6..d181bb2a 100644 --- a/common/crc16.c +++ b/common/crc16.c @@ -1,11 +1,22 @@ -WORD update_crc16( WORD crc, BYTE c ) { - WORD i, v, tcrc = 0; - - v = (crc ^ c) & 0xff; - for (i = 0; i < 8; i++) { - tcrc = ( (tcrc ^ v) & 1 ) ? ( tcrc >> 1 ) ^ 0x8408 : tcrc >> 1; - v >>= 1; - } - - return ((crc >> 8) ^ tcrc)&0xffff; -} +//----------------------------------------------------------------------------- +// This code is licensed to you under the terms of the GNU GPL, version 2 or, +// at your option, any later version. See the LICENSE.txt file for the text of +// the license. +//----------------------------------------------------------------------------- +// CRC16 +//----------------------------------------------------------------------------- + +#include "crc16.h" + +unsigned short update_crc16( unsigned short crc, unsigned char c ) +{ + unsigned short i, v, tcrc = 0; + + v = (crc ^ c) & 0xff; + for (i = 0; i < 8; i++) { + tcrc = ( (tcrc ^ v) & 1 ) ? ( tcrc >> 1 ) ^ 0x8408 : tcrc >> 1; + v >>= 1; + } + + return ((crc >> 8) ^ tcrc)&0xffff; +}