libstdc++-v3/include/ext/pb_ds/detail/splay_tree_/find_fn_imps.hpp

   1 // -*- C++ -*-
   2
   3 // Copyright (C) 2005-2019 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the terms
   7 // of the GNU General Public License as published by the Free Software
   8 // Foundation; either version 3, or (at your option) any later
   9 // version.
  10
  11 // This library is distributed in the hope that it will be useful, but
  12 // WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 // General Public License for more details.
  15
  16 // Under Section 7 of GPL version 3, you are granted additional
  17 // permissions described in the GCC Runtime Library Exception, version
  18 // 3.1, as published by the Free Software Foundation.
  19
  20 // You should have received a copy of the GNU General Public License and
  21 // a copy of the GCC Runtime Library Exception along with this program;
  22 // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  23 // <http://www.gnu.org/licenses/>.
  24
  25 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
  26
  27 // Permission to use, copy, modify, sell, and distribute this software
  28 // is hereby granted without fee, provided that the above copyright
  29 // notice appears in all copies, and that both that copyright notice
  30 // and this permission notice appear in supporting documentation. None
  31 // of the above authors, nor IBM Haifa Research Laboratories, make any
  32 // representation about the suitability of this software for any
  33 // purpose. It is provided "as is" without express or implied
  34 // warranty.
  35
  36 /**
  37  * @file splay_tree_/find_fn_imps.hpp
  38  * Contains an implementation class for splay_tree_.
  39  */
  40
  41 #ifdef PB_DS_CLASS_C_DEC
  42
  43 PB_DS_CLASS_T_DEC
  44 inline typename PB_DS_CLASS_C_DEC::point_iterator
  45 PB_DS_CLASS_C_DEC::
  46 find(key_const_reference r_key)
  47 {
  48   node_pointer p_found = find_imp(r_key);
  49   if (p_found != base_type::m_p_head)
  50     splay(p_found);
  51   return point_iterator(p_found);
  52 }
  53
  54 PB_DS_CLASS_T_DEC
  55 inline typename PB_DS_CLASS_C_DEC::point_const_iterator
  56 PB_DS_CLASS_C_DEC::
  57 find(key_const_reference r_key) const
  58 {
  59   const node_pointer p_found = find_imp(r_key);
  60   if (p_found != base_type::m_p_head)
  61     const_cast<PB_DS_CLASS_C_DEC* >(this)->splay(p_found);
  62   return point_iterator(p_found);
  63 }
  64
  65 PB_DS_CLASS_T_DEC
  66 inline typename PB_DS_CLASS_C_DEC::node_pointer
  67 PB_DS_CLASS_C_DEC::
  68 find_imp(key_const_reference r_key)
  69 {
  70   _GLIBCXX_DEBUG_ONLY(base_type::structure_only_assert_valid(__FILE__,
  71                                                              __LINE__);)
  72   node_pointer p_nd = base_type::m_p_head->m_p_parent;
  73   while (p_nd != 0)
  74     if (!Cmp_Fn::operator()(PB_DS_V2F(p_nd->m_value), r_key))
  75       {
  76         if (!Cmp_Fn::operator()(r_key, PB_DS_V2F(p_nd->m_value)))
  77           return p_nd;
  78         p_nd = p_nd->m_p_left;
  79       }
  80     else
  81       p_nd = p_nd->m_p_right;
  82   return base_type::m_p_head;
  83 }
  84
  85 PB_DS_CLASS_T_DEC
  86 inline const typename PB_DS_CLASS_C_DEC::node_pointer
  87 PB_DS_CLASS_C_DEC::
  88 find_imp(key_const_reference r_key) const
  89 {
  90   PB_DS_ASSERT_VALID((*this))
  91   node_pointer p_nd = base_type::m_p_head->m_p_parent;
  92   while (p_nd != 0)
  93     if (!Cmp_Fn::operator()(PB_DS_V2F(p_nd->m_value), r_key))
  94       {
  95         if (!Cmp_Fn::operator()(r_key, PB_DS_V2F(p_nd->m_value)))
  96           return p_nd;
  97         p_nd = p_nd->m_p_left;
  98       }
  99     else
 100       p_nd = p_nd->m_p_right;
 101   return base_type::m_p_head;
 102 }
 103 #endif