mingw/lib/gcc/mingw32/4.3.3/include/c++/ext/pb_ds/detail/ov_tree_map_/split_join_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 split_join_fn_imps.hpp
  44  * Contains an implementation class for ov_tree_.
  45  */
  46
  47 PB_DS_CLASS_T_DEC
  48 void
  49 PB_DS_CLASS_C_DEC::
  50 split(const_key_reference r_key, PB_DS_CLASS_C_DEC& other)
  51 {
  52   _GLIBCXX_DEBUG_ONLY(assert_valid();)
  53   _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
  54
  55   if (m_size == 0)
  56     {
  57       other.clear();
  58       _GLIBCXX_DEBUG_ONLY(assert_valid();)
  59       _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
  60       return;
  61     }
  62
  63   if (Cmp_Fn::operator()(r_key, PB_DS_V2F(*begin())))
  64     {
  65       value_swap(other);
  66       _GLIBCXX_DEBUG_ONLY(assert_valid();)
  67       _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
  68       return;
  69     }
  70
  71   if (!Cmp_Fn::operator()(r_key, PB_DS_V2F(*(end() - 1))))
  72     {
  73       _GLIBCXX_DEBUG_ONLY(assert_valid();)
  74       _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
  75       return;
  76     }
  77
  78   if (m_size == 1)
  79     {
  80       value_swap(other);
  81       _GLIBCXX_DEBUG_ONLY(assert_valid();)
  82       _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
  83       return;
  84     }
  85
  86   _GLIBCXX_DEBUG_ONLY(debug_base::join(other);)
  87   iterator it = upper_bound(r_key);
  88   PB_DS_CLASS_C_DEC new_other(other, other);
  89   new_other.copy_from_ordered_range(it, end());
  90   PB_DS_CLASS_C_DEC new_this(*this, * this);
  91   new_this.copy_from_ordered_range(begin(), it);
  92
  93   // No exceptions from this point.
  94   _GLIBCXX_DEBUG_ONLY(debug_base::split(r_key,(Cmp_Fn& )(*this), other);)
  95   other.update(other.node_begin(), (node_update* )(&other));
  96   update(node_begin(), (node_update* )this);
  97   other.value_swap(new_other);
  98   value_swap(new_this);
  99   _GLIBCXX_DEBUG_ONLY(assert_valid();)
 100   _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
 101 }
 102
 103 PB_DS_CLASS_T_DEC
 104 void
 105 PB_DS_CLASS_C_DEC::
 106 join(PB_DS_CLASS_C_DEC& other)
 107 {
 108   _GLIBCXX_DEBUG_ONLY(assert_valid();)
 109   _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
 110   if (other.m_size == 0)
 111     return;
 112
 113   if (m_size == 0)
 114     {
 115       value_swap(other);
 116       return;
 117     }
 118
 119   const bool greater = Cmp_Fn::operator()(PB_DS_V2F(*(end() - 1)),
 120                                           PB_DS_V2F(*other.begin()));
 121
 122   const bool lesser = Cmp_Fn::operator()(PB_DS_V2F(*(other.end() - 1)),
 123                                          PB_DS_V2F(*begin()));
 124
 125   if (!greater && !lesser)
 126     __throw_join_error();
 127
 128   PB_DS_CLASS_C_DEC new_this(*this, *this);
 129
 130   if (greater)
 131     new_this.copy_from_ordered_range(begin(), end(),
 132                                      other.begin(), other.end());
 133   else
 134     new_this.copy_from_ordered_range(other.begin(), other.end(),
 135                                      begin(), end());
 136
 137   // No exceptions from this point.
 138   _GLIBCXX_DEBUG_ONLY(debug_base::join(other);)
 139   value_swap(new_this);
 140   other.clear();
 141   _GLIBCXX_DEBUG_ONLY(assert_valid();)
 142   _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
 143 }