diff options
author | Anders Broman <anders.broman@ericsson.com> | 2012-07-12 14:24:19 +0000 |
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committer | Anders Broman <anders.broman@ericsson.com> | 2012-07-12 14:24:19 +0000 |
commit | 02d23f97b09fdf5a511f7ac0cc136ed4e295bcae (patch) | |
tree | 4653ea8adc2144f2b6c33ecf02641e7100745ebf /wsutil/crc7.h | |
parent | 5a63e1b79a73156c024a93806888df2c0da3ba6d (diff) |
Add crc7 calculation abillity.
svn path=/trunk/; revision=43680
Diffstat (limited to 'wsutil/crc7.h')
-rw-r--r-- | wsutil/crc7.h | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/wsutil/crc7.h b/wsutil/crc7.h new file mode 100644 index 0000000000..e9104b37b0 --- /dev/null +++ b/wsutil/crc7.h @@ -0,0 +1,92 @@ +/* + * crc7.h + * + * $Id$ + * + * Functions and types for CRC checks. + * + * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Generated on Wed Jul 11 17:24:57 2012, + * by pycrc v0.7.10, http://www.tty1.net/pycrc/ + * using the configuration: + * Width = 7 + * Poly = 0x45 + * XorIn = 0x00 + * ReflectIn = False + * XorOut = 0x00 + * ReflectOut = False + * Algorithm = table-driven + **************************************************************************** + */ +#ifndef __CRC7__H__ +#define __CRC7__H__ + +#include <stdlib.h> +#include <stdint.h> + +#ifdef __cplusplus +extern "C" { +#endif + + +/** + * The definition of the used algorithm. + *****************************************************************************/ +#define CRC_ALGO_TABLE_DRIVEN 1 + +/** + * Calculate the initial crc value. + * + * \return The initial crc value. + *****************************************************************************/ +static inline guint8 crc7init(void) +{ + return 0x00 << 1; +} + + +/** + * Update the crc value with new data. + * + * \param crc The current crc value. + * \param data Pointer to a buffer of \a data_len bytes. + * \param data_len Number of bytes in the \a data buffer. + * \return The updated crc value. + *****************************************************************************/ +extern guint8 crc7update(guint8 crc, const unsigned char *data, int data_len); + + +/** + * Calculate the final crc value. + * + * \param crc The current crc value. + * \return The final crc value. + *****************************************************************************/ +static inline guint8 crc7finalize(guint8 crc) +{ + return (crc >> 1) ^ 0x00; +} + + +#ifdef __cplusplus +} /* closing brace for extern "C" */ +#endif + +#endif /* __CRC7__H__ */ |