Function db_num_fields

Exercises/Modules/Chapter 18/Soln18_04/DB.cpp:84–95

}

int db_num_fields(DB_QUERY_RESULT* result)
{
  auto* theResult{ reinterpret_cast<QueryResult*>(result) };
  if (!theResult || theResult->data.empty())
  {
    return -1;
  }
  else
  {
    return static_cast<int>(theResult->data.front().size());
  }
}

DB_ROW db_fetch_row(DB_QUERY_RESULT* result)
{