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/usr/include/c++/11/ext/pb_ds/detail/splay_tree_/split_join_fn_imps.hpp


$ cat -n /usr/include/c++/11/ext/pb_ds/detail/splay_tree_/split_join_fn_imps.hpp

     1	// -*- C++ -*-
     2	
     3	// Copyright (C) 2005-2021 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 splay_tree_/split_join_fn_imps.hpp
    38	 * Contains an implementation class for splay_tree_.
    39	 */
    40	
    41	#ifdef PB_DS_CLASS_C_DEC
    42	
    43	PB_DS_CLASS_T_DEC
    44	inline void
    45	PB_DS_CLASS_C_DEC::
    46	join(PB_DS_CLASS_C_DEC& other)
    47	{
    48	  PB_DS_ASSERT_VALID((*this))
    49	  PB_DS_ASSERT_VALID(other)
    50	  if (base_type::join_prep(other) == false)
    51	    {
    52	      PB_DS_ASSERT_VALID((*this))
    53	      PB_DS_ASSERT_VALID(other)
    54	      return;
    55	    }
    56	
    57	  node_pointer p_target_r = other.leftmost(other.m_p_head);
    58	  _GLIBCXX_DEBUG_ASSERT(p_target_r != 0);
    59	  other.splay(p_target_r);
    60	
    61	  _GLIBCXX_DEBUG_ASSERT(p_target_r == other.m_p_head->m_p_parent);
    62	  _GLIBCXX_DEBUG_ASSERT(p_target_r->m_p_left == 0);
    63	
    64	  p_target_r->m_p_left = base_type::m_p_head->m_p_parent;
    65	
    66	  _GLIBCXX_DEBUG_ASSERT(p_target_r->m_p_left != 0);
    67	  p_target_r->m_p_left->m_p_parent = p_target_r;
    68	
    69	  base_type::m_p_head->m_p_parent = p_target_r;
    70	  p_target_r->m_p_parent = base_type::m_p_head;
    71	
    72	  this->apply_update(p_target_r, (node_update*)this);
    73	  base_type::join_finish(other);
    74	
    75	  PB_DS_ASSERT_VALID((*this))
    76	  PB_DS_ASSERT_VALID(other)
    77	}
    78	
    79	PB_DS_CLASS_T_DEC
    80	void
    81	PB_DS_CLASS_C_DEC::
    82	split(key_const_reference r_key, PB_DS_CLASS_C_DEC& other)
    83	{
    84	  PB_DS_ASSERT_VALID((*this))
    85	  PB_DS_ASSERT_VALID(other)
    86	
    87	  if (base_type::split_prep(r_key, other) == false)
    88	    {
    89	      PB_DS_ASSERT_VALID((*this))
    90	      PB_DS_ASSERT_VALID(other)
    91	      return;
    92	    }
    93	
    94	  node_pointer p_upper_bound = this->upper_bound(r_key).m_p_nd;
    95	  _GLIBCXX_DEBUG_ASSERT(p_upper_bound != 0);
    96	
    97	  splay(p_upper_bound);
    98	  _GLIBCXX_DEBUG_ASSERT(p_upper_bound->m_p_parent == this->m_p_head);
    99	
   100	  node_pointer p_new_root = p_upper_bound->m_p_left;
   101	  _GLIBCXX_DEBUG_ASSERT(p_new_root != 0);
   102	
   103	  base_type::m_p_head->m_p_parent = p_new_root;
   104	  p_new_root->m_p_parent = base_type::m_p_head;
   105	  other.m_p_head->m_p_parent = p_upper_bound;
   106	  p_upper_bound->m_p_parent = other.m_p_head;
   107	  p_upper_bound->m_p_left = 0;
   108	  this->apply_update(p_upper_bound, (node_update*)this);
   109	  base_type::split_finish(other);
   110	
   111	  PB_DS_ASSERT_VALID((*this))
   112	  PB_DS_ASSERT_VALID(other)
   113	}
   114	
   115	#endif