binomial_heap_base_/find_fn_imps.hpp

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// -*- C++ -*-
 
// Copyright (C) 2005-2021 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 binomial_heap_base_/find_fn_imps.hpp
 * Contains an implementation class for a base of binomial heaps.
 */
 
#ifdef PB_DS_CLASS_C_DEC
 
PB_DS_CLASS_T_DEC
inline typename PB_DS_CLASS_C_DEC::const_reference
PB_DS_CLASS_C_DEC::
top() const
{
  PB_DS_ASSERT_VALID_COND((*this),false)
  _GLIBCXX_DEBUG_ASSERT(!base_type::empty());
 
  if (m_p_max == 0)
    const_cast<PB_DS_CLASS_C_DEC* >(this)->find_max();
 
  _GLIBCXX_DEBUG_ASSERT(m_p_max != 0);
  return m_p_max->m_value;
}
 
PB_DS_CLASS_T_DEC
void
PB_DS_CLASS_C_DEC::
find_max()
{
  node_pointer p_cur = base_type::m_p_root;
  m_p_max = p_cur;
  while (p_cur != 0)
    {
      if (Cmp_Fn::operator()(m_p_max->m_value, p_cur->m_value))
        m_p_max = p_cur;
      p_cur = p_cur->m_p_next_sibling;
    }
}
 
#endif