libstdc++
binary_heap_/find_fn_imps.hpp
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00001 // -*- C++ -*-
00002 
00003 // Copyright (C) 2005, 2006, 2009, 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 binary_heap_/find_fn_imps.hpp
00038  * Contains an implementation class for a binary_heap.
00039  */
00040 
00041 PB_DS_CLASS_T_DEC
00042 inline typename PB_DS_CLASS_C_DEC::const_reference
00043 PB_DS_CLASS_C_DEC::
00044 top() const
00045 {
00046   PB_DS_ASSERT_VALID((*this))
00047   _GLIBCXX_DEBUG_ASSERT(!empty());
00048   return top_imp(s_no_throw_copies_ind);
00049 }
00050 
00051 PB_DS_CLASS_T_DEC
00052 inline typename PB_DS_CLASS_C_DEC::const_reference
00053 PB_DS_CLASS_C_DEC::
00054 top_imp(true_type) const
00055 { return *m_a_entries; }
00056 
00057 PB_DS_CLASS_T_DEC
00058 inline typename PB_DS_CLASS_C_DEC::const_reference
00059 PB_DS_CLASS_C_DEC::
00060 top_imp(false_type) const
00061 { return **m_a_entries; }
00062 
00063 PB_DS_CLASS_T_DEC
00064 inline typename PB_DS_CLASS_C_DEC::size_type
00065 PB_DS_CLASS_C_DEC::
00066 left_child(size_type i)
00067 { return i * 2 + 1; }
00068 
00069 PB_DS_CLASS_T_DEC
00070 inline typename PB_DS_CLASS_C_DEC::size_type
00071 PB_DS_CLASS_C_DEC::
00072 right_child(size_type i)
00073 { return i * 2 + 2; }
00074 
00075 PB_DS_CLASS_T_DEC
00076 inline typename PB_DS_CLASS_C_DEC::size_type
00077 PB_DS_CLASS_C_DEC::
00078 parent(size_type i)
00079 { return (i - 1) / 2; }