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