mirror of
https://github.com/ton-blockchain/ton
synced 2025-03-09 15:40:10 +00:00
73 lines
1.8 KiB
C++
73 lines
1.8 KiB
C++
/*
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This file is part of TON Blockchain Library.
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TON Blockchain Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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TON Blockchain Library 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 Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with TON Blockchain Library. If not, see <http://www.gnu.org/licenses/>.
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Copyright 2017-2020 Telegram Systems LLP
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*/
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#pragma once
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#include "td/utils/common.h"
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#include "td/fec/algebra/SparseMatrixGF2.h"
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namespace td {
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struct InactivationDecodingResult {
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uint32 size;
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vector<uint32> p_rows;
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vector<uint32> p_cols;
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};
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class InactivationDecoding {
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public:
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InactivationDecoding(const SparseMatrixGF2 &L, uint32 PI) : L_(L), PI_(PI) {
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}
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InactivationDecodingResult run();
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private:
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const SparseMatrixGF2 &L_;
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uint32 PI_;
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const SparseMatrixGF2 L_rows_{L_.transpose()};
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const uint32 cols_ = L_.cols() - PI_;
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const uint32 rows_ = L_.rows();
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vector<bool> was_row_;
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vector<bool> was_col_;
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vector<uint32> col_cnt_;
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vector<uint32> row_cnt_;
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vector<uint32> row_xor_;
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vector<uint32> sorted_rows_;
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vector<uint32> row_cnt_offset_;
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vector<uint32> row_pos_;
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vector<uint32> p_rows_;
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vector<uint32> p_cols_;
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vector<uint32> inactive_cols_;
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void init();
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void loop();
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void check_sorted();
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uint32 choose_col(uint32 row);
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void inactivate_col(uint32 col);
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void sort_rows();
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void check(uint32 side);
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};
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} // namespace td
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