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40 lines
1.2 KiB
40 lines
1.2 KiB
// Copyright 2014 PDFium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
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#ifndef FXBARCODE_COMMON_REEDSOLOMON_BC_REEDSOLOMONGF256_H_
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#define FXBARCODE_COMMON_REEDSOLOMON_BC_REEDSOLOMONGF256_H_
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#include <memory>
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#include "third_party/base/optional.h"
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class CBC_ReedSolomonGF256Poly;
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class CBC_ReedSolomonGF256 {
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public:
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explicit CBC_ReedSolomonGF256(int32_t primitive);
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~CBC_ReedSolomonGF256();
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CBC_ReedSolomonGF256Poly* GetZero() const { return m_zero.get(); }
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CBC_ReedSolomonGF256Poly* GetOne() const { return m_one.get(); }
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std::unique_ptr<CBC_ReedSolomonGF256Poly> BuildMonomial(int32_t degree,
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int32_t coefficient);
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static int32_t AddOrSubtract(int32_t a, int32_t b);
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int32_t Exp(int32_t a);
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Optional<int32_t> Inverse(int32_t a);
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int32_t Multiply(int32_t a, int32_t b);
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void Init();
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private:
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std::unique_ptr<CBC_ReedSolomonGF256Poly> m_zero;
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std::unique_ptr<CBC_ReedSolomonGF256Poly> m_one;
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int32_t m_expTable[256];
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int32_t m_logTable[256];
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};
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#endif // FXBARCODE_COMMON_REEDSOLOMON_BC_REEDSOLOMONGF256_H_
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