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