1 // Copyright 2014 PDFium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4 
5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
6 
7 #ifndef _BC_REEDSOLOMONGF256_H_
8 #define _BC_REEDSOLOMONGF256_H_
9 class CBC_ReedSolomonGF256Poly;
10 class CBC_ReedSolomonGF256 {
11  public:
12   static void Initialize();
13   static void Finalize();
14   static CBC_ReedSolomonGF256* QRCodeFild;
15   static CBC_ReedSolomonGF256* DataMatrixField;
16   CBC_ReedSolomonGF256(int32_t primitive);
17   virtual ~CBC_ReedSolomonGF256();
18   CBC_ReedSolomonGF256Poly* GetZero();
19   CBC_ReedSolomonGF256Poly* GetOne();
20   CBC_ReedSolomonGF256Poly* BuildMonomial(int32_t degree,
21                                           int32_t coefficient,
22                                           int32_t& e);
23   static int32_t AddOrSubtract(int32_t a, int32_t b);
24   int32_t Exp(int32_t a);
25   int32_t Log(int32_t a, int32_t& e);
26   int32_t Inverse(int32_t a, int32_t& e);
27   int32_t Multiply(int32_t a, int32_t b);
28   virtual void Init();
29 
30  private:
31   int32_t m_expTable[256];
32   int32_t m_logTable[256];
33   CBC_ReedSolomonGF256Poly* m_zero;
34   CBC_ReedSolomonGF256Poly* m_one;
35 };
36 #endif
37