std::pair ResLevelDB::GetValueWithVersion()

in chain/storage/leveldb.cpp [219:244]

• 26 lines of code
• 7 McCabe index (conditional complexity)

std::pair<std::string, int> ResLevelDB::GetValueWithVersion(
    const std::string& key, int version) {
  std::string value_str = GetValue(key);
  ValueHistory history;
  if (!history.ParseFromString(value_str)) {
    LOG(ERROR) << "old_value parse fail";
    return std::make_pair("", 0);
  }
  if (history.value_size() == 0) {
    return std::make_pair("", 0);
  }
  if (version > 0) {
    for (int i = history.value_size() - 1; i >= 0; --i) {
      if (history.value(i).version() == version) {
        return std::make_pair(history.value(i).value(),
                              history.value(i).version());
      }
      if (history.value(i).version() < version) {
        break;
      }
    }
  }
  int last_idx = history.value_size() - 1;
  return std::make_pair(history.value(last_idx).value(),
                        history.value(last_idx).version());
}