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