Method bits_set

sql/sql_bitmap.h:273–280

    return buffer[0];
  }
  uint bits_set() const
  {
    uint res= 0;
    for (size_t i= 0; i < ARRAY_ELEMENTS; i++)
      if (buffer[i])
        res+= my_count_bits(buffer[i]);
    return res;
  }
  uint find_first_bit() const
  {
    for (size_t i= 0; i < ARRAY_ELEMENTS; i++)