Method base_list

sql/sql_list.cc:38–69

base_list::base_list(const base_list &rhs, MEM_ROOT *mem_root)
{
  if (rhs.elements)
  {
    /*
      It's okay to allocate an array of nodes at once: we never
      call a destructor for list_node objects anyway.
    */
    first= (list_node*) alloc_root(mem_root,
                                   sizeof(list_node) * rhs.elements);
    if (first)
    {
      elements= rhs.elements;
      list_node *dst= first;
      list_node *src= rhs.first;
      for (; dst < first + elements - 1; dst++, src= src->next)
      {
        dst->info= src->info;
        dst->next= dst + 1;
      }
      /* Copy the last node */
      dst->info= src->info;
      dst->next= &end_of_list;
      /* Setup 'last' member */
      last= &dst->next;
      return;
    }
  }
  elements= 0;
  first= &end_of_list;
  last= &first;
}