libstdc++
rb_tree_map_/insert_fn_imps.hpp
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00001 // -*- C++ -*-
00002 
00003 // Copyright (C) 2005, 2006, 2009, 2010, 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 rb_tree_map_/insert_fn_imps.hpp
00038  * Contains an implementation for rb_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 = base_type::insert_leaf(r_value);
00048   if (ins_pair.second == true)
00049     {
00050       ins_pair.first.m_p_nd->m_red = true;
00051       PB_DS_STRUCT_ONLY_ASSERT_VALID((*this))
00052       insert_fixup(ins_pair.first.m_p_nd);
00053     }
00054 
00055   PB_DS_ASSERT_VALID((*this))
00056   return ins_pair;
00057 }
00058 
00059 PB_DS_CLASS_T_DEC
00060 inline void
00061 PB_DS_CLASS_C_DEC::
00062 insert_fixup(node_pointer p_nd)
00063 {
00064   _GLIBCXX_DEBUG_ASSERT(p_nd->m_red == true);
00065   while (p_nd != base_type::m_p_head->m_p_parent && p_nd->m_p_parent->m_red)
00066     {
00067       if (p_nd->m_p_parent == p_nd->m_p_parent->m_p_parent->m_p_left)
00068         {
00069       node_pointer p_y = p_nd->m_p_parent->m_p_parent->m_p_right;
00070       if (p_y != 0 && p_y->m_red)
00071             {
00072           p_nd->m_p_parent->m_red = false;
00073           p_y->m_red = false;
00074           p_nd->m_p_parent->m_p_parent->m_red = true;
00075           p_nd = p_nd->m_p_parent->m_p_parent;
00076             }
00077       else
00078             {
00079           if (p_nd == p_nd->m_p_parent->m_p_right)
00080                 {
00081           p_nd = p_nd->m_p_parent;
00082           base_type::rotate_left(p_nd);
00083                 }
00084           p_nd->m_p_parent->m_red = false;
00085           p_nd->m_p_parent->m_p_parent->m_red = true;
00086           base_type::rotate_right(p_nd->m_p_parent->m_p_parent);
00087             }
00088         }
00089       else
00090         {
00091       node_pointer p_y = p_nd->m_p_parent->m_p_parent->m_p_left;
00092       if (p_y != 0 && p_y->m_red)
00093             {
00094           p_nd->m_p_parent->m_red = false;
00095           p_y->m_red = false;
00096           p_nd->m_p_parent->m_p_parent->m_red = true;
00097           p_nd = p_nd->m_p_parent->m_p_parent;
00098             }
00099       else
00100             {
00101           if (p_nd == p_nd->m_p_parent->m_p_left)
00102                 {
00103           p_nd = p_nd->m_p_parent;
00104           base_type::rotate_right(p_nd);
00105                 }
00106           p_nd->m_p_parent->m_red = false;
00107           p_nd->m_p_parent->m_p_parent->m_red = true;
00108           base_type::rotate_left(p_nd->m_p_parent->m_p_parent);
00109             }
00110         }
00111     }
00112 
00113   base_type::update_to_top(p_nd, (node_update* )this);
00114   base_type::m_p_head->m_p_parent->m_red = false;
00115 }