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_PDF417ECMODULUSGF_H_
8 #define _BC_PDF417ECMODULUSGF_H_
9 class CBC_PDF417ECModulusPoly;
10 class CBC_PDF417Common;
11 class CBC_PDF417ECModulusGF {
12  public:
13   CBC_PDF417ECModulusGF(int32_t modulus, int32_t generator, int32_t& e);
14   virtual ~CBC_PDF417ECModulusGF();
15   static void Initialize(int32_t& e);
16   static void Finalize();
17   CBC_PDF417ECModulusPoly* getZero();
18   CBC_PDF417ECModulusPoly* getOne();
19   CBC_PDF417ECModulusPoly* buildMonomial(int32_t degree,
20                                          int32_t coefficient,
21                                          int32_t& e);
22   int32_t add(int32_t a, int32_t b);
23   int32_t subtract(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   int32_t getSize();
29   static CBC_PDF417ECModulusGF* PDF417_GF;
30 
31  private:
32   CFX_Int32Array m_expTable;
33   CFX_Int32Array m_logTable;
34   CBC_PDF417ECModulusPoly* m_zero;
35   CBC_PDF417ECModulusPoly* m_one;
36   int32_t m_modulus;
37 };
38 #endif
39