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// Copyright 2014 The PDFium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
#ifndef FXBARCODE_PDF417_BC_PDF417HIGHLEVELENCODER_H_
#define FXBARCODE_PDF417_BC_PDF417HIGHLEVELENCODER_H_
#include "core/fxcrt/widestring.h"
#include "fxbarcode/pdf417/BC_PDF417.h"
#include "third_party/abseil-cpp/absl/types/optional.h"
#include "third_party/base/span.h"
class CBC_PDF417HighLevelEncoder {
public:
CBC_PDF417HighLevelEncoder() = delete;
~CBC_PDF417HighLevelEncoder() = delete;
static absl::optional<WideString> EncodeHighLevel(WideStringView msg);
private:
enum class EncodingMode { kUnknown = 0, kText, kByte, kNumeric };
enum class SubMode { kAlpha = 0, kLower, kMixed, kPunctuation };
static SubMode EncodeText(const WideString& msg,
size_t startpos,
size_t count,
SubMode initialSubmode,
WideString* sb);
static void EncodeBinary(pdfium::span<const uint8_t> bytes,
size_t startpos,
size_t count,
EncodingMode startmode,
WideString* sb);
static void EncodeNumeric(const WideString& msg,
size_t startpos,
size_t count,
WideString* sb);
static size_t DetermineConsecutiveDigitCount(WideString msg, size_t startpos);
static size_t DetermineConsecutiveTextCount(WideString msg, size_t startpos);
static absl::optional<size_t> DetermineConsecutiveBinaryCount(
WideString msg,
pdfium::span<const uint8_t> bytes,
size_t startpos);
friend class PDF417HighLevelEncoderTest_ConsecutiveBinaryCount_Test;
friend class PDF417HighLevelEncoderTest_ConsecutiveDigitCount_Test;
friend class PDF417HighLevelEncoderTest_ConsecutiveTextCount_Test;
friend class PDF417HighLevelEncoderTest_EncodeBinary_Test;
friend class PDF417HighLevelEncoderTest_EncodeHighLevel_Test;
friend class PDF417HighLevelEncoderTest_EncodeNumeric_Test;
friend class PDF417HighLevelEncoderTest_EncodeText_Test;
};
#endif // FXBARCODE_PDF417_BC_PDF417HIGHLEVELENCODER_H_
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