rb_tree_map_/insert_fn_imps.hpp
Go to the documentation of this file.
// -*- C++ -*-
// Copyright (C) 2005-2013 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library 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; either version 3, or (at your option) any later
// version.
// This library 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.
// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.
// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
// <http://www.gnu.org/licenses/>.
// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
// Permission to use, copy, modify, sell, and distribute this software
// is hereby granted without fee, provided that the above copyright
// notice appears in all copies, and that both that copyright notice
// and this permission notice appear in supporting documentation. None
// of the above authors, nor IBM Haifa Research Laboratories, make any
// representation about the suitability of this software for any
// purpose. It is provided "as is" without express or implied
// warranty.
/**
* @file rb_tree_map_/insert_fn_imps.hpp
* Contains an implementation for rb_tree_.
*/
PB_DS_CLASS_T_DEC
inline std::pair<typename PB_DS_CLASS_C_DEC::point_iterator, bool>
PB_DS_CLASS_C_DEC::
insert(const_reference r_value)
{
PB_DS_ASSERT_VALID((*this))
std::pair<point_iterator, bool> ins_pair = base_type::insert_leaf(r_value);
if (ins_pair.second == true)
{
ins_pair.first.m_p_nd->m_red = true;
PB_DS_STRUCT_ONLY_ASSERT_VALID((*this))
insert_fixup(ins_pair.first.m_p_nd);
}
PB_DS_ASSERT_VALID((*this))
return ins_pair;
}
PB_DS_CLASS_T_DEC
inline void
PB_DS_CLASS_C_DEC::
insert_fixup(node_pointer p_nd)
{
_GLIBCXX_DEBUG_ASSERT(p_nd->m_red == true);
while (p_nd != base_type::m_p_head->m_p_parent && p_nd->m_p_parent->m_red)
{
if (p_nd->m_p_parent == p_nd->m_p_parent->m_p_parent->m_p_left)
{
node_pointer p_y = p_nd->m_p_parent->m_p_parent->m_p_right;
if (p_y != 0 && p_y->m_red)
{
p_nd->m_p_parent->m_red = false;
p_y->m_red = false;
p_nd->m_p_parent->m_p_parent->m_red = true;
p_nd = p_nd->m_p_parent->m_p_parent;
}
else
{
if (p_nd == p_nd->m_p_parent->m_p_right)
{
p_nd = p_nd->m_p_parent;
base_type::rotate_left(p_nd);
}
p_nd->m_p_parent->m_red = false;
p_nd->m_p_parent->m_p_parent->m_red = true;
base_type::rotate_right(p_nd->m_p_parent->m_p_parent);
}
}
else
{
node_pointer p_y = p_nd->m_p_parent->m_p_parent->m_p_left;
if (p_y != 0 && p_y->m_red)
{
p_nd->m_p_parent->m_red = false;
p_y->m_red = false;
p_nd->m_p_parent->m_p_parent->m_red = true;
p_nd = p_nd->m_p_parent->m_p_parent;
}
else
{
if (p_nd == p_nd->m_p_parent->m_p_left)
{
p_nd = p_nd->m_p_parent;
base_type::rotate_right(p_nd);
}
p_nd->m_p_parent->m_red = false;
p_nd->m_p_parent->m_p_parent->m_red = true;
base_type::rotate_left(p_nd->m_p_parent->m_p_parent);
}
}
}
base_type::update_to_top(p_nd, (node_update* )this);
base_type::m_p_head->m_p_parent->m_red = false;
}