mingw/lib/gcc/mingw32/4.3.3/include/c++/ext/pb_ds/detail/pairing_heap_/insert_fn_imps.hpp

   1 // -*- C++ -*-
   2
   3 // Copyright (C) 2005, 2006 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 2, 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 // You should have received a copy of the GNU General Public License
  17 // along with this library; see the file COPYING.  If not, write to
  18 // the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
  19 // MA 02111-1307, USA.
  20
  21 // As a special exception, you may use this file as part of a free
  22 // software library without restriction.  Specifically, if other files
  23 // instantiate templates or use macros or inline functions from this
  24 // file, or you compile this file and link it with other files to
  25 // produce an executable, this file does not by itself cause the
  26 // resulting executable to be covered by the GNU General Public
  27 // License.  This exception does not however invalidate any other
  28 // reasons why the executable file might be covered by the GNU General
  29 // Public License.
  30
  31 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
  32
  33 // Permission to use, copy, modify, sell, and distribute this software
  34 // is hereby granted without fee, provided that the above copyright
  35 // notice appears in all copies, and that both that copyright notice
  36 // and this permission notice appear in supporting documentation. None
  37 // of the above authors, nor IBM Haifa Research Laboratories, make any
  38 // representation about the suitability of this software for any
  39 // purpose. It is provided "as is" without express or implied
  40 // warranty.
  41
  42 /**
  43  * @file insert_fn_imps.hpp
  44  * Contains an implementation class for a pairing heap.
  45  */
  46
  47 PB_DS_CLASS_T_DEC
  48 inline typename PB_DS_CLASS_C_DEC::point_iterator
  49 PB_DS_CLASS_C_DEC::
  50 push(const_reference r_val)
  51 {
  52   _GLIBCXX_DEBUG_ONLY(assert_valid();)
  53
  54     node_pointer p_new_nd = base_type::get_new_node_for_insert(r_val);
  55
  56   push_imp(p_new_nd);
  57
  58   _GLIBCXX_DEBUG_ONLY(assert_valid();)
  59
  60     return point_iterator(p_new_nd);
  61 }
  62
  63 PB_DS_CLASS_T_DEC
  64 inline void
  65 PB_DS_CLASS_C_DEC::
  66 push_imp(node_pointer p_nd)
  67 {
  68   p_nd->m_p_l_child = NULL;
  69
  70   if (base_type::m_p_root == NULL)
  71     {
  72       p_nd->m_p_next_sibling = p_nd->m_p_prev_or_parent = NULL;
  73
  74       base_type::m_p_root = p_nd;
  75     }
  76   else if (Cmp_Fn::operator()(base_type::m_p_root->m_value, p_nd->m_value))
  77     {
  78       p_nd->m_p_next_sibling = p_nd->m_p_prev_or_parent = NULL;
  79
  80       base_type::make_child_of(base_type::m_p_root, p_nd);
  81       _GLIBCXX_DEBUG_ONLY(base_type::assert_node_consistent(p_nd, false));
  82
  83       base_type::m_p_root = p_nd;
  84     }
  85   else
  86     {
  87       base_type::make_child_of(p_nd, base_type::m_p_root);
  88       _GLIBCXX_DEBUG_ONLY(base_type::assert_node_consistent(base_type::m_p_root, false));
  89     }
  90 }
  91
  92 PB_DS_CLASS_T_DEC
  93 void
  94 PB_DS_CLASS_C_DEC::
  95 modify(point_iterator it, const_reference r_new_val)
  96 {
  97   _GLIBCXX_DEBUG_ONLY(assert_valid();)
  98
  99     remove_node(it.m_p_nd);
 100
 101   it.m_p_nd->m_value = r_new_val;
 102
 103   push_imp(it.m_p_nd);
 104
 105   _GLIBCXX_DEBUG_ONLY(assert_valid();)
 106     }
 107