58 lines
1.5 KiB
C++
58 lines
1.5 KiB
C++
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/*
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* Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
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* Copyright (C) 2017 Furrtek
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*
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* This file is part of PortaPack.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#include <string>
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#ifndef __DE_BRUIJN_H__
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#define __DE_BRUIJN_H__
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// n from 3 to 16
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const uint32_t de_bruijn_polys[14] {
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0b0000000000000101,
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0b0000000000001001,
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0b0000000000011011,
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0b0000000000110011,
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0b0000000001010011,
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0b0000000010001101,
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0b0000000100100001,
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0b0000001000100001,
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0b0000010001100001,
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0b0000110101000011,
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0b0001001001100101,
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0b0010101100000011,
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0b0101000000001001,
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0b1010000101000101
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};
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struct de_bruijn {
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public:
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size_t init(const uint32_t n);
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uint32_t compute(const uint32_t steps);
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private:
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uint32_t length { };
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uint32_t poly { };
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uint32_t shift_register { };
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};
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#endif/*__DE_BRUIJN_H__*/
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