xref: /aosp_15_r20/external/pdfium/fxbarcode/pdf417/BC_PDF417HighLevelEncoder.h (revision 3ac0a46f773bac49fa9476ec2b1cf3f8da5ec3a4)
1 // Copyright 2014 The PDFium Authors
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 "core/fxcrt/widestring.h"
11 #include "fxbarcode/pdf417/BC_PDF417.h"
12 #include "third_party/abseil-cpp/absl/types/optional.h"
13 #include "third_party/base/containers/span.h"
14 
15 class CBC_PDF417HighLevelEncoder {
16  public:
17   CBC_PDF417HighLevelEncoder() = delete;
18   ~CBC_PDF417HighLevelEncoder() = delete;
19 
20   static absl::optional<WideString> EncodeHighLevel(WideStringView msg);
21 
22  private:
23   enum class EncodingMode { kUnknown = 0, kText, kByte, kNumeric };
24 
25   enum class SubMode { kAlpha = 0, kLower, kMixed, kPunctuation };
26 
27   static SubMode EncodeText(const WideString& msg,
28                             size_t startpos,
29                             size_t count,
30                             SubMode initialSubmode,
31                             WideString* sb);
32   static void EncodeBinary(pdfium::span<const uint8_t> bytes,
33                            size_t startpos,
34                            size_t count,
35                            EncodingMode startmode,
36                            WideString* sb);
37   static void EncodeNumeric(const WideString& msg,
38                             size_t startpos,
39                             size_t count,
40                             WideString* sb);
41   static size_t DetermineConsecutiveDigitCount(WideString msg, size_t startpos);
42   static size_t DetermineConsecutiveTextCount(WideString msg, size_t startpos);
43   static absl::optional<size_t> DetermineConsecutiveBinaryCount(
44       WideString msg,
45       pdfium::span<const uint8_t> bytes,
46       size_t startpos);
47 
48   friend class PDF417HighLevelEncoderTest_ConsecutiveBinaryCount_Test;
49   friend class PDF417HighLevelEncoderTest_ConsecutiveDigitCount_Test;
50   friend class PDF417HighLevelEncoderTest_ConsecutiveTextCount_Test;
51   friend class PDF417HighLevelEncoderTest_EncodeBinary_Test;
52   friend class PDF417HighLevelEncoderTest_EncodeHighLevel_Test;
53   friend class PDF417HighLevelEncoderTest_EncodeNumeric_Test;
54   friend class PDF417HighLevelEncoderTest_EncodeText_Test;
55 };
56 
57 #endif  // FXBARCODE_PDF417_BC_PDF417HIGHLEVELENCODER_H_
58