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/*
* crc16-plain.h
* http://www.tty1.net/pycrc/faq_en.html#code-ownership
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
/**
* \file crc16-plain.h
* Functions and types for CRC checks.
*
* Generated on Wed Mar 18 14:12:15 2009,
* by pycrc v0.7, http://www.tty1.net/pycrc/
* using the configuration:
* Width = 16
* Poly = 0x8005
* XorIn = 0x0000
* ReflectIn = True
* XorOut = 0x0000
* ReflectOut = True
* Algorithm = table-driven
* Direct = True
*
* Modified 2009-03-16 not to include <stdint.h> as our Win32 environment
* appears not to have it; we're using GLib types, instead.
*****************************************************************************/
#ifndef __CRC____PLAIN_H__
#define __CRC____PLAIN_H__
#include "ws_symbol_export.h"
#include <glib.h>
#include <stdlib.h>
#ifdef __cplusplus
extern "C" {
#endif
/**
* The definition of the used algorithm.
*****************************************************************************/
#define CRC_ALGO_TABLE_DRIVEN 1
/**
* The type of the CRC values.
*
* This type must be big enough to contain at least 16 bits.
*****************************************************************************/
typedef guint16 crc16_plain_t;
/**
* Reflect all bits of a \a data word of \a data_len bytes.
*
* \param data The data word to be reflected.
* \param data_len The width of \a data expressed in number of bits.
* \return The reflected data.
*****************************************************************************/
long crc16_plain_reflect(long data, size_t data_len);
/**
* Calculate the initial crc value.
*
* \return The initial crc value.
*****************************************************************************/
static inline crc16_plain_t crc16_plain_init(void)
{
return 0x0000;
}
/**
* 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
crc16_plain_t crc16_plain_update(crc16_plain_t crc, const unsigned char *data, size_t data_len);
/**
* Calculate the final crc value.
*
* \param crc The current crc value.
* \return The final crc value.
*****************************************************************************/
static inline crc16_plain_t crc16_plain_finalize(crc16_plain_t crc)
{
return crc ^ 0x0000;
}
/* Generated on Tue Jul 24 09:08:46 2012,
* by pycrc v0.7.10, http://www.tty1.net/pycrc/
* using the configuration:
* Width = 16
* Poly = 0x8005
* XorIn = 0x0000
* ReflectIn = False
* XorOut = 0x0000
* ReflectOut = False
* Algorithm = table-driven
*
* Calculate the crc-16 (x^16 + x^15 + x^2 + 1) value for data. Note that this
* CRC is not equal to crc16_plain.
*
* \param data Pointer to a buffer of \a data_len bytes.
* \param data_len Number of bytes in the \a data buffer.
* \return The crc value.
*****************************************************************************/
WS_DLL_PUBLIC
guint16 crc16_8005_noreflect_noxor(const guint8 *data, guint64 data_len);
#ifdef __cplusplus
} /* closing brace for extern "C" */
#endif
#endif /* __CRC____PLAIN_H__ */
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