libstdc++
splay_tree_/find_fn_imps.hpp
Go to the documentation of this file.
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 splay_tree_/find_fn_imps.hpp
00038  * Contains an implementation class for splay_tree_.
00039  */
00040 
00041 PB_DS_CLASS_T_DEC
00042 inline typename PB_DS_CLASS_C_DEC::point_iterator
00043 PB_DS_CLASS_C_DEC::
00044 find(key_const_reference r_key)
00045 {
00046   node_pointer p_found = find_imp(r_key);
00047   if (p_found != base_type::m_p_head)
00048     splay(p_found);
00049   return point_iterator(p_found);
00050 }
00051 
00052 PB_DS_CLASS_T_DEC
00053 inline typename PB_DS_CLASS_C_DEC::point_const_iterator
00054 PB_DS_CLASS_C_DEC::
00055 find(key_const_reference r_key) const
00056 {
00057   const node_pointer p_found = find_imp(r_key);
00058   if (p_found != base_type::m_p_head)
00059     const_cast<PB_DS_CLASS_C_DEC* >(this)->splay(p_found);
00060   return point_iterator(p_found);
00061 }
00062 
00063 PB_DS_CLASS_T_DEC
00064 inline typename PB_DS_CLASS_C_DEC::node_pointer
00065 PB_DS_CLASS_C_DEC::
00066 find_imp(key_const_reference r_key)
00067 {
00068   _GLIBCXX_DEBUG_ONLY(base_type::structure_only_assert_valid(__FILE__,
00069                                  __LINE__);)
00070   node_pointer p_nd = base_type::m_p_head->m_p_parent;
00071   while (p_nd != 0)
00072     if (!Cmp_Fn::operator()(PB_DS_V2F(p_nd->m_value), r_key))
00073       {
00074     if (!Cmp_Fn::operator()(r_key, PB_DS_V2F(p_nd->m_value)))
00075       return p_nd;
00076     p_nd = p_nd->m_p_left;
00077       }
00078     else
00079       p_nd = p_nd->m_p_right;
00080   return base_type::m_p_head;
00081 }
00082 
00083 PB_DS_CLASS_T_DEC
00084 inline const typename PB_DS_CLASS_C_DEC::node_pointer
00085 PB_DS_CLASS_C_DEC::
00086 find_imp(key_const_reference r_key) const
00087 {
00088   PB_DS_ASSERT_VALID((*this))
00089   node_pointer p_nd = base_type::m_p_head->m_p_parent;
00090   while (p_nd != 0)
00091     if (!Cmp_Fn::operator()(PB_DS_V2F(p_nd->m_value), r_key))
00092       {
00093     if (!Cmp_Fn::operator()(r_key, PB_DS_V2F(p_nd->m_value)))
00094       return p_nd;
00095     p_nd = p_nd->m_p_left;
00096       }
00097     else
00098       p_nd = p_nd->m_p_right;
00099   return base_type::m_p_head;
00100 }