mingw/lib/gcc/mingw32/4.4.0/include/c++/ext/pb_ds/detail/binary_heap_/find_fn_imps.hpp

   1 // -*- C++ -*-
   2
   3 // Copyright (C) 2005, 2006, 2009 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 find_fn_imps.hpp
  38  * Contains an implementation class for a binary_heap.
  39  */
  40
  41 PB_DS_CLASS_T_DEC
  42 inline typename PB_DS_CLASS_C_DEC::const_reference
  43 PB_DS_CLASS_C_DEC::
  44 top() const
  45 {
  46   _GLIBCXX_DEBUG_ONLY(assert_valid();)
  47     _GLIBCXX_DEBUG_ASSERT(!empty());
  48
  49   return top_imp(s_no_throw_copies_ind);
  50 }
  51
  52 PB_DS_CLASS_T_DEC
  53 inline typename PB_DS_CLASS_C_DEC::const_reference
  54 PB_DS_CLASS_C_DEC::
  55 top_imp(true_type) const
  56 {
  57   return* m_a_entries;
  58 }
  59
  60 PB_DS_CLASS_T_DEC
  61 inline typename PB_DS_CLASS_C_DEC::const_reference
  62 PB_DS_CLASS_C_DEC::
  63 top_imp(false_type) const
  64 {
  65   return** m_a_entries;
  66 }
  67
  68 PB_DS_CLASS_T_DEC
  69 inline typename PB_DS_CLASS_C_DEC::size_type
  70 PB_DS_CLASS_C_DEC::
  71 left_child(size_type i)
  72 {
  73   return i*  2 + 1;
  74 }
  75
  76 PB_DS_CLASS_T_DEC
  77 inline typename PB_DS_CLASS_C_DEC::size_type
  78 PB_DS_CLASS_C_DEC::
  79 right_child(size_type i)
  80 {
  81   return i*  2 + 2;
  82 }
  83
  84 PB_DS_CLASS_T_DEC
  85 inline typename PB_DS_CLASS_C_DEC::size_type
  86 PB_DS_CLASS_C_DEC::
  87 parent(size_type i)
  88 {
  89   return (i - 1) / 2;
  90 }
  91