chromium/third_party/pdfium/fxbarcode/qrcode/BC_QRCoderEncoder.cpp

// 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
// Original code is licensed as follows:
/*
 * Copyright 2008 ZXing authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "fxbarcode/qrcode/BC_QRCoderEncoder.h"

#include <stdint.h>

#include <algorithm>
#include <memory>
#include <optional>
#include <utility>
#include <vector>

#include "core/fxcrt/check.h"
#include "core/fxcrt/check_op.h"
#include "core/fxcrt/data_vector.h"
#include "core/fxcrt/fx_string.h"
#include "core/fxcrt/stl_util.h"
#include "fxbarcode/common/BC_CommonByteMatrix.h"
#include "fxbarcode/common/reedsolomon/BC_ReedSolomon.h"
#include "fxbarcode/common/reedsolomon/BC_ReedSolomonGF256.h"
#include "fxbarcode/qrcode/BC_QRCoder.h"
#include "fxbarcode/qrcode/BC_QRCoderBitVector.h"
#include "fxbarcode/qrcode/BC_QRCoderECBlockData.h"
#include "fxbarcode/qrcode/BC_QRCoderMaskUtil.h"
#include "fxbarcode/qrcode/BC_QRCoderMatrixUtil.h"
#include "fxbarcode/qrcode/BC_QRCoderMode.h"
#include "fxbarcode/qrcode/BC_QRCoderVersion.h"

ModeStringPair;

namespace {

CBC_ReedSolomonGF256* g_QRCodeField = …;

struct QRCoderBlockPair { … };

// This is a mapping for an ASCII table, starting at an index of 32.
const auto kAlphaNumericTable = …;

int32_t GetAlphaNumericCode(int32_t code) { … }

bool AppendNumericBytes(const ByteString& content, CBC_QRCoderBitVector* bits) { … }

bool AppendAlphaNumericBytes(const ByteString& content,
                             CBC_QRCoderBitVector* bits) { … }

bool Append8BitBytes(const ByteString& content, CBC_QRCoderBitVector* bits) { … }

void AppendModeInfo(CBC_QRCoderMode* mode, CBC_QRCoderBitVector* bits) { … }

bool AppendLengthInfo(int32_t numLetters,
                      int32_t version,
                      CBC_QRCoderMode* mode,
                      CBC_QRCoderBitVector* bits) { … }

bool AppendBytes(const ByteString& content,
                 CBC_QRCoderMode* mode,
                 CBC_QRCoderBitVector* bits) { … }

bool InitQRCode(int32_t numInputBytes,
                const CBC_QRCoderErrorCorrectionLevel* ecLevel,
                CBC_QRCoder* qrCode) { … }

DataVector<uint8_t> GenerateECBytes(pdfium::span<const uint8_t> dataBytes,
                                    size_t numEcBytesInBlock) { … }

int32_t CalculateMaskPenalty(CBC_CommonByteMatrix* matrix) { … }

std::optional<int32_t> ChooseMaskPattern(
    CBC_QRCoderBitVector* bits,
    const CBC_QRCoderErrorCorrectionLevel* ecLevel,
    int32_t version,
    CBC_CommonByteMatrix* matrix) { … }

void GetNumDataBytesAndNumECBytesForBlockID(int32_t numTotalBytes,
                                            int32_t numDataBytes,
                                            int32_t numRSBlocks,
                                            int32_t blockID,
                                            int32_t* numDataBytesInBlock,
                                            int32_t* numECBytesInBlock) { … }

bool TerminateBits(int32_t numDataBytes, CBC_QRCoderBitVector* bits) { … }

CBC_QRCoderMode* ChooseMode(const ByteString& content) { … }

bool InterleaveWithECBytes(CBC_QRCoderBitVector* bits,
                           int32_t numTotalBytes,
                           int32_t numDataBytes,
                           int32_t numRSBlocks,
                           CBC_QRCoderBitVector* result) { … }

}  // namespace

// static
void CBC_QRCoderEncoder::Initialize() { … }

// static
void CBC_QRCoderEncoder::Finalize() { … }

// static
bool CBC_QRCoderEncoder::Encode(WideStringView content,
                                const CBC_QRCoderErrorCorrectionLevel* ecLevel,
                                CBC_QRCoder* qrCode) { … }