libstdc++-v3/include/ext/pb_ds/detail/thin_heap_/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 for thin_heap_.
  45  */
  46
  47 PB_DS_CLASS_T_DEC
  48 template<typename Pred>
  49 void
  50 PB_DS_CLASS_C_DEC::
  51 split(Pred pred, PB_DS_CLASS_C_DEC& other)
  52 {
  53   _GLIBCXX_DEBUG_ONLY(assert_valid();)
  54     _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
  55
  56     other.clear();
  57
  58   if (base_type::empty())
  59     {
  60       _GLIBCXX_DEBUG_ONLY(assert_valid();)
  61         _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
  62
  63         return;
  64     }
  65
  66   base_type::to_linked_list();
  67
  68   node_pointer p_out = base_type::prune(pred);
  69
  70   while (p_out != NULL)
  71     {
  72       _GLIBCXX_DEBUG_ASSERT(base_type::m_size > 0);
  73       --base_type::m_size;
  74
  75       ++other.m_size;
  76
  77       node_pointer p_next = p_out->m_p_next_sibling;
  78
  79       other.make_root_and_link(p_out);
  80
  81       p_out = p_next;
  82     }
  83
  84   _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
  85
  86     node_pointer p_cur = base_type::m_p_root;
  87
  88   m_p_max = NULL;
  89
  90   base_type::m_p_root = NULL;
  91
  92   while (p_cur != NULL)
  93     {
  94       node_pointer p_next = p_cur->m_p_next_sibling;
  95
  96       make_root_and_link(p_cur);
  97
  98       p_cur = p_next;
  99     }
 100
 101   _GLIBCXX_DEBUG_ONLY(assert_valid();)
 102     _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
 103     }
 104
 105 PB_DS_CLASS_T_DEC
 106 inline void
 107 PB_DS_CLASS_C_DEC::
 108 join(PB_DS_CLASS_C_DEC& other)
 109 {
 110   _GLIBCXX_DEBUG_ONLY(assert_valid();)
 111     _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
 112
 113     node_pointer p_other = other.m_p_root;
 114
 115   while (p_other != NULL)
 116     {
 117       node_pointer p_next = p_other->m_p_next_sibling;
 118
 119       make_root_and_link(p_other);
 120
 121       p_other = p_next;
 122     }
 123
 124   base_type::m_size += other.m_size;
 125
 126   other.m_p_root = NULL;
 127   other.m_size = 0;
 128   other.m_p_max = NULL;
 129
 130   _GLIBCXX_DEBUG_ONLY(assert_valid();)
 131     _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
 132     }