forked from osmocom/wireshark
122 lines
3.5 KiB
C
122 lines
3.5 KiB
C
/** @file
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* http://www.tty1.net/pycrc/faq_en.html#code-ownership
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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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/**
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* \file crc16-plain.h
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* Functions and types for CRC checks.
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*
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* Generated on Wed Mar 18 14:12:15 2009,
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* by pycrc v0.7, http://www.tty1.net/pycrc/
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* using the configuration:
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* Width = 16
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* Poly = 0x8005
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* XorIn = 0x0000
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* ReflectIn = True
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* XorOut = 0x0000
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* ReflectOut = True
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* Algorithm = table-driven
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* Direct = True
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*
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* Modified 2009-03-16 not to include <stdint.h> as our Win32 environment
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* appears not to have it; we're using GLib types, instead.
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*****************************************************************************/
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#ifndef __CRC____PLAIN_H__
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#define __CRC____PLAIN_H__
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#include "ws_symbol_export.h"
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#include <glib.h>
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#include <stdlib.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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* The type of the CRC values.
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*
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* This type must be big enough to contain at least 16 bits.
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*****************************************************************************/
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typedef guint16 crc16_plain_t;
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/**
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* Reflect all bits of a \a data word of \a data_len bytes.
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*
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* \param data The data word to be reflected.
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* \param data_len The width of \a data expressed in number of bits.
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* \return The reflected data.
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*****************************************************************************/
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long crc16_plain_reflect(long data, size_t data_len);
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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 crc16_plain_t crc16_plain_init(void)
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{
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return 0x0000;
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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
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crc16_plain_t crc16_plain_update(crc16_plain_t crc, const unsigned char *data, size_t 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 crc16_plain_t crc16_plain_finalize(crc16_plain_t crc)
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{
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return crc ^ 0x0000;
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}
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/* Generated on Tue Jul 24 09:08:46 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 = 16
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* Poly = 0x8005
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* XorIn = 0x0000
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* ReflectIn = False
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* XorOut = 0x0000
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* ReflectOut = False
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* Algorithm = table-driven
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*
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* Calculate the crc-16 (x^16 + x^15 + x^2 + 1) value for data. Note that this
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* CRC is not equal to crc16_plain.
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*
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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 crc value.
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*****************************************************************************/
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WS_DLL_PUBLIC
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guint16 crc16_8005_noreflect_noxor(const guint8 *data, guint64 data_len);
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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 /* __CRC____PLAIN_H__ */
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