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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 FXBARCODE_PDF417_BC_PDF417HIGHLEVELENCODER_H_
8 #define FXBARCODE_PDF417_BC_PDF417HIGHLEVELENCODER_H_
9 
10 #include <vector>
11 
12 #include "core/fxcrt/fx_string.h"
13 #include "fxbarcode/pdf417/BC_PDF417.h"
14 #include "third_party/base/optional.h"
15 #include "third_party/base/span.h"
16 
17 class CBC_PDF417HighLevelEncoder {
18  public:
19   CBC_PDF417HighLevelEncoder() = delete;
20   ~CBC_PDF417HighLevelEncoder() = delete;
21 
22   static Optional<WideString> EncodeHighLevel(WideStringView msg);
23 
24  private:
25   enum class EncodingMode { kUnknown = 0, kText, kByte, kNumeric };
26 
27   enum class SubMode { kAlpha = 0, kLower, kMixed, kPunctuation };
28 
29   static SubMode EncodeText(const WideString& msg,
30                             size_t startpos,
31                             size_t count,
32                             SubMode initialSubmode,
33                             WideString* sb);
34   static void EncodeBinary(pdfium::span<const uint8_t> bytes,
35                            size_t startpos,
36                            size_t count,
37                            EncodingMode startmode,
38                            WideString* sb);
39   static void EncodeNumeric(const WideString& msg,
40                             size_t startpos,
41                             size_t count,
42                             WideString* sb);
43   static size_t DetermineConsecutiveDigitCount(WideString msg, size_t startpos);
44   static size_t DetermineConsecutiveTextCount(WideString msg, size_t startpos);
45   static Optional<size_t> DetermineConsecutiveBinaryCount(
46       WideString msg,
47       std::vector<uint8_t>* bytes,
48       size_t startpos);
49 
50   friend class PDF417HighLevelEncoderTest_ConsecutiveBinaryCount_Test;
51   friend class PDF417HighLevelEncoderTest_ConsecutiveDigitCount_Test;
52   friend class PDF417HighLevelEncoderTest_ConsecutiveTextCount_Test;
53   friend class PDF417HighLevelEncoderTest_EncodeBinary_Test;
54   friend class PDF417HighLevelEncoderTest_EncodeHighLevel_Test;
55   friend class PDF417HighLevelEncoderTest_EncodeNumeric_Test;
56   friend class PDF417HighLevelEncoderTest_EncodeText_Test;
57 };
58 
59 #endif  // FXBARCODE_PDF417_BC_PDF417HIGHLEVELENCODER_H_
60