mingw/lib/gcc/mingw32/4.3.3/include/c++/ext/pb_ds/detail/binomial_heap_base_/find_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 find_fn_imps.hpp
  44  * Contains an implementation class for a base of binomial heaps.
  45  */
  46
  47 PB_DS_CLASS_T_DEC
  48 inline typename PB_DS_CLASS_C_DEC::const_reference
  49 PB_DS_CLASS_C_DEC::
  50 top() const
  51 {
  52   _GLIBCXX_DEBUG_ONLY(assert_valid(false);)
  53     _GLIBCXX_DEBUG_ASSERT(!base_type::empty());
  54
  55   if (m_p_max == NULL)
  56     const_cast<PB_DS_CLASS_C_DEC* >(this)->find_max();
  57
  58   _GLIBCXX_DEBUG_ASSERT(m_p_max != NULL);
  59   return m_p_max->m_value;
  60 }
  61
  62 PB_DS_CLASS_T_DEC
  63 void
  64 PB_DS_CLASS_C_DEC::
  65 find_max()
  66 {
  67   node_pointer p_cur = base_type::m_p_root;
  68
  69   m_p_max = p_cur;
  70
  71   while (p_cur != NULL)
  72     {
  73       if (Cmp_Fn::operator()(m_p_max->m_value, p_cur->m_value))
  74         m_p_max = p_cur;
  75
  76       p_cur = p_cur->m_p_next_sibling;
  77     }
  78 }
  79