| // 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 "third_party/base/optional.h" |
| |
| class CBC_ReedSolomonGF256Poly; |
| |
| class CBC_ReedSolomonGF256 { |
| public: |
| explicit CBC_ReedSolomonGF256(int32_t primitive); |
| ~CBC_ReedSolomonGF256(); |
| |
| CBC_ReedSolomonGF256Poly* GetZero() const { return m_zero.get(); } |
| CBC_ReedSolomonGF256Poly* GetOne() const { return m_one.get(); } |
| |
| std::unique_ptr<CBC_ReedSolomonGF256Poly> BuildMonomial(int32_t degree, |
| int32_t coefficient); |
| static int32_t AddOrSubtract(int32_t a, int32_t b); |
| int32_t Exp(int32_t a); |
| Optional<int32_t> Inverse(int32_t a); |
| int32_t Multiply(int32_t a, int32_t b); |
| void Init(); |
| |
| private: |
| std::unique_ptr<CBC_ReedSolomonGF256Poly> m_zero; |
| std::unique_ptr<CBC_ReedSolomonGF256Poly> m_one; |
| int32_t m_expTable[256]; |
| int32_t m_logTable[256]; |
| }; |
| |
| #endif // FXBARCODE_COMMON_REEDSOLOMON_BC_REEDSOLOMONGF256_H_ |