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_ONEDUPCEANREADER_H_
8#define _BC_ONEDUPCEANREADER_H_
9class CBC_OneDReader;
10class CBC_CommonBitArray;
11class CBC_OneDimReader;
12class CBC_OneDimReader : public CBC_OneDReader {
13 private:
14  const static int32_t MAX_AVG_VARIANCE;
15  const static int32_t MAX_INDIVIDUAL_VARIANCE;
16
17  FX_BOOL CheckStandardUPCEANChecksum(CFX_ByteString& s, int32_t& e);
18
19 public:
20  const static int32_t START_END_PATTERN[3];
21  const static int32_t MIDDLE_PATTERN[5];
22  const static int32_t L_PATTERNS[10][4];
23  const static int32_t L_AND_G_PATTERNS[20][4];
24  CBC_OneDimReader();
25  virtual ~CBC_OneDimReader();
26  CFX_ByteString DecodeRow(int32_t rowNumber,
27                           CBC_CommonBitArray* row,
28                           int32_t hints,
29                           int32_t& e);
30  CFX_ByteString DecodeRow(int32_t rowNumber,
31                           CBC_CommonBitArray* row,
32                           CFX_Int32Array* startGuardRange,
33                           int32_t hints,
34                           int32_t& e);
35
36 protected:
37  CFX_Int32Array* FindStartGuardPattern(CBC_CommonBitArray* row, int32_t& e);
38  virtual FX_BOOL CheckChecksum(CFX_ByteString& s, int32_t& e);
39  CFX_Int32Array* FindGuardPattern(CBC_CommonBitArray* row,
40                                   int32_t rowOffset,
41                                   FX_BOOL whiteFirst,
42                                   CFX_Int32Array* pattern,
43                                   int32_t& e);
44  int32_t DecodeDigit(CBC_CommonBitArray* row,
45                      CFX_Int32Array* counters,
46                      int32_t rowOffset,
47                      const int32_t* patterns,
48                      int32_t patternLength,
49                      int32_t& e);
50  virtual int32_t DecodeMiddle(CBC_CommonBitArray* row,
51                               CFX_Int32Array* startRange,
52                               CFX_ByteString& resultResult,
53                               int32_t& e) {
54    return 0;
55  }
56  virtual CFX_Int32Array* DecodeEnd(CBC_CommonBitArray* row,
57                                    int32_t endStart,
58                                    int32_t& e);
59};
60#endif
61