90 lines
2.5 KiB
C
90 lines
2.5 KiB
C
/*
|
|
* crc7.h
|
|
*
|
|
* 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 "ws_symbol_export.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.
|
|
*****************************************************************************/
|
|
WS_DLL_PUBLIC 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__ */
|