mariadb/sql/sql_list.cc

/* Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; version 2 of the License.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */


#ifdef USE_PRAGMA_IMPLEMENTATION
#pragma implementation				// gcc: Class implementation
#endif

#include "sql_list.h"

list_node end_of_list;

void free_list(I_List <i_string_pair> *list)
{
  i_string_pair *tmp;
  while ((tmp= list->get()))
    delete tmp;
}


void free_list(I_List <i_string> *list)
{
  i_string *tmp;
  while ((tmp= list->get()))
    delete tmp;
}


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;
}