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/*
* Provides routines for encoding and decoding the extended Golay
* (24,12,8) code.
*
* This implementation will detect up to 4 errors in a codeword (without
* being able to correct them); it will correct up to 3 errors.
*
* We use guint32s to hold the 24-bit codewords, with the data part in
* the bottom 12 bits and the parity in bits 12-23.
*
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#ifndef __GOLAY_H__
#define __GOLAY_H__
#include "ws_symbol_export.h"
/* encodes a 12-bit word to a 24-bit codeword
*/
WS_DLL_PUBLIC
guint32 golay_encode(guint w);
/* return a mask showing the bits which are in error in a received
* 24-bit codeword, or -1 if 4 errors were detected.
*/
WS_DLL_PUBLIC
gint32 golay_errors(guint32 codeword);
/* decode a received codeword. Up to 3 errors are corrected for; 4
errors are detected as uncorrectable (return -1); 5 or more errors
cause an incorrect correction.
*/
WS_DLL_PUBLIC
gint golay_decode(guint32 w);
#endif
/*
* Editor modelines
*
* Local Variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* ex: set shiftwidth=4 tabstop=8 expandtab:
* :indentSize=4:tabSize=8:noTabs=true:
*/
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