forked from osmocom/wireshark
77 lines
1.9 KiB
C
77 lines
1.9 KiB
C
/** @file
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*
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* Functions and types for CRC checks.
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*
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* Generated on Wed Jul 11 17:24:57 2012,
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* by pycrc v0.7.10, http://www.tty1.net/pycrc/
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* using the configuration:
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* Width = 7
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* Poly = 0x45
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* XorIn = 0x00
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* ReflectIn = False
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* XorOut = 0x00
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* ReflectOut = False
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* Algorithm = table-driven
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****************************************************************************
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*/
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#ifndef __CRC7__H__
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#define __CRC7__H__
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#include "ws_symbol_export.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* The definition of the used algorithm.
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*****************************************************************************/
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#define CRC_ALGO_TABLE_DRIVEN 1
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/**
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* Calculate the initial crc value.
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*
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* \return The initial crc value.
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*****************************************************************************/
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static inline guint8 crc7init(void)
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{
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return 0x00 << 1;
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}
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/**
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* Update the crc value with new data.
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*
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* \param crc The current crc value.
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* \param data Pointer to a buffer of \a data_len bytes.
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* \param data_len Number of bytes in the \a data buffer.
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* \return The updated crc value.
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*****************************************************************************/
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WS_DLL_PUBLIC guint8 crc7update(guint8 crc, const unsigned char *data, int data_len);
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/**
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* Calculate the final crc value.
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*
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* \param crc The current crc value.
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* \return The final crc value.
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*****************************************************************************/
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static inline guint8 crc7finalize(guint8 crc)
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{
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return (crc >> 1) ^ 0x00;
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}
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#ifdef __cplusplus
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} /* closing brace for extern "C" */
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#endif
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#endif /* __CRC7__H__ */
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