Method getPageForAnchor

lib/Epub/Epub/Section.cpp:370–398

}

std::optional<uint16_t> Section::getPageForAnchor(const std::string& anchor) const {
  HalFile f;
  if (!Storage.openFileForRead("SCT", filePath, f)) {
    return std::nullopt;
  }

  const uint32_t fileSize = f.size();
  f.seek(HEADER_SIZE - sizeof(uint32_t) * 3);
  uint32_t anchorMapOffset;
  serialization::readPod(f, anchorMapOffset);
  if (anchorMapOffset == 0 || anchorMapOffset >= fileSize) {
    return std::nullopt;
  }

  f.seek(anchorMapOffset);
  uint16_t count;
  serialization::readPod(f, count);
  for (uint16_t i = 0; i < count; i++) {
    std::string key;
    uint16_t page;
    serialization::readString(f, key);
    serialization::readPod(f, page);
    if (key == anchor) {
      return page;
    }
  }

  return std::nullopt;
}

std::optional<uint16_t> Section::getPageForParagraphIndex(const uint16_t pIndex) const {
  HalFile f;