diff options
Diffstat (limited to 'epan/crcdrm.c')
| -rw-r--r-- | epan/crcdrm.c | 50 |
1 files changed, 0 insertions, 50 deletions
diff --git a/epan/crcdrm.c b/epan/crcdrm.c deleted file mode 100644 index 345a232bb9..0000000000 --- a/epan/crcdrm.c +++ /dev/null @@ -1,50 +0,0 @@ -/* crcdrm.c - * another CRC 16 - * Copyright 2006, British Broadcasting Corporation - * - * $Id$ - * - * Wireshark - Network traffic analyzer - * By Gerald Combs <gerald@wireshark.org> - * Copyright 1998 Gerald Combs - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version 2 - * of the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. - */ - - -#include "crcdrm.h" - -unsigned long crc_drm(const char *data, size_t bytesize, - unsigned short num_crc_bits, unsigned long crc_gen, int invert) -{ - unsigned long crc_holder, ones, i, msb, databit; - signed short j; - - ones = (1 << num_crc_bits) - 1; - crc_holder = ones; - for (i=0; i<bytesize; i++) - for (j=7; j>=0; j--) - { - crc_holder <<= 1; - msb = crc_holder >> num_crc_bits; - databit = (data[i] >> j) & 1; - if ((msb ^ databit) != 0) - crc_holder = crc_holder ^ crc_gen; - crc_holder = crc_holder & ones; - } - if (invert) - crc_holder = crc_holder ^ ones; /* invert checksum */ - return crc_holder; -} |