libstdc++
splay_tree_/insert_fn_imps.hpp
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00001 // -*- C++ -*-
00002 
00003 // Copyright (C) 2005, 2006, 2009, 2010i, 2011 Free Software Foundation, Inc.
00004 //
00005 // This file is part of the GNU ISO C++ Library.  This library is free
00006 // software; you can redistribute it and/or modify it under the terms
00007 // of the GNU General Public License as published by the Free Software
00008 // Foundation; either version 3, or (at your option) any later
00009 // version.
00010 
00011 // This library is distributed in the hope that it will be useful, but
00012 // WITHOUT ANY WARRANTY; without even the implied warranty of
00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014 // General Public License for more details.
00015 
00016 // Under Section 7 of GPL version 3, you are granted additional
00017 // permissions described in the GCC Runtime Library Exception, version
00018 // 3.1, as published by the Free Software Foundation.
00019 
00020 // You should have received a copy of the GNU General Public License and
00021 // a copy of the GCC Runtime Library Exception along with this program;
00022 // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
00023 // <http://www.gnu.org/licenses/>.
00024 
00025 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
00026 
00027 // Permission to use, copy, modify, sell, and distribute this software
00028 // is hereby granted without fee, provided that the above copyright
00029 // notice appears in all copies, and that both that copyright notice
00030 // and this permission notice appear in supporting documentation. None
00031 // of the above authors, nor IBM Haifa Research Laboratories, make any
00032 // representation about the suitability of this software for any
00033 // purpose. It is provided "as is" without express or implied
00034 // warranty.
00035 
00036 /**
00037  * @file splay_tree_/insert_fn_imps.hpp
00038  * Contains an implementation class for splay_tree_.
00039  */
00040 
00041 PB_DS_CLASS_T_DEC
00042 inline std::pair<typename PB_DS_CLASS_C_DEC::point_iterator, bool>
00043 PB_DS_CLASS_C_DEC::
00044 insert(const_reference r_value)
00045 {
00046   PB_DS_ASSERT_VALID((*this))
00047   std::pair<point_iterator, bool> ins_pair = insert_leaf_imp(r_value);
00048   ins_pair.first.m_p_nd->m_special = false;
00049   PB_DS_ASSERT_VALID((*this))
00050   splay(ins_pair.first.m_p_nd);
00051   PB_DS_ASSERT_VALID((*this))
00052   return ins_pair;
00053 }
00054 
00055 PB_DS_CLASS_T_DEC
00056 inline std::pair<typename PB_DS_CLASS_C_DEC::point_iterator, bool>
00057 PB_DS_CLASS_C_DEC::
00058 insert_leaf_imp(const_reference r_value)
00059 {
00060   _GLIBCXX_DEBUG_ONLY(base_type::structure_only_assert_valid(__FILE__,
00061                                  __LINE__);)
00062   if (base_type::m_size == 0)
00063     return std::make_pair(base_type::insert_imp_empty(r_value), true);
00064 
00065   node_pointer p_nd = base_type::m_p_head->m_p_parent;
00066   node_pointer p_pot = base_type::m_p_head;
00067 
00068   while (p_nd != 0)
00069     if (!Cmp_Fn::operator()(PB_DS_V2F(p_nd->m_value), PB_DS_V2F(r_value)))
00070       {
00071     if (!Cmp_Fn::operator()(PB_DS_V2F(r_value), PB_DS_V2F(p_nd->m_value)))
00072       {
00073         return std::make_pair(point_iterator(p_nd), false);
00074       }
00075     p_pot = p_nd;
00076     p_nd = p_nd->m_p_left;
00077       }
00078     else
00079       p_nd = p_nd->m_p_right;
00080 
00081   if (p_pot == base_type::m_p_head)
00082     return std::make_pair(base_type::insert_leaf_new(r_value, base_type::m_p_head->m_p_right, false), true);
00083 
00084   PB_DS_CHECK_KEY_DOES_NOT_EXIST(PB_DS_V2F(r_value))
00085 
00086   p_nd = p_pot->m_p_left;
00087   if (p_nd == 0)
00088     return (std::make_pair(base_type::insert_leaf_new(r_value, p_pot, true), true));
00089 
00090   while (p_nd->m_p_right != 0)
00091     p_nd = p_nd->m_p_right;
00092 
00093   return std::make_pair(this->insert_leaf_new(r_value, p_nd, false), true);
00094 }