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/usr/include/c++/11/ext/pb_ds/detail/pat_trie_/rotate_fn_imps.hpp


$ cat -n /usr/include/c++/11/ext/pb_ds/detail/pat_trie_/rotate_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 pat_trie_/rotate_fn_imps.hpp
    38	 * Contains imps for rotating nodes.
    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	rotate_left(node_pointer p_x)
    47	{
    48	  node_pointer p_y = p_x->m_p_right;
    49	  p_x->m_p_right = p_y->m_p_left;
    50	
    51	  if (p_y->m_p_left != 0)
    52	    p_y->m_p_left->m_p_parent = p_x;
    53	
    54	  p_y->m_p_parent = p_x->m_p_parent;
    55	  if (p_x == m_p_head->m_p_parent)
    56	    m_p_head->m_p_parent = p_y;
    57	  else if (p_x == p_x->m_p_parent->m_p_left)
    58	    p_x->m_p_parent->m_p_left = p_y;
    59	  else
    60	    p_x->m_p_parent->m_p_right = p_y;
    61	
    62	  p_y->m_p_left = p_x;
    63	  p_x->m_p_parent = p_y;
    64	
    65	  _GLIBCXX_DEBUG_ONLY(assert_node_consistent(p_x);)
    66	  _GLIBCXX_DEBUG_ONLY(assert_node_consistent(p_y);)
    67	
    68	  apply_update(p_x, (Node_Update*)this);
    69	  apply_update(p_x->m_p_parent, (Node_Update*)this);
    70	}
    71	
    72	PB_DS_CLASS_T_DEC
    73	inline void
    74	PB_DS_CLASS_C_DEC::
    75	rotate_right(node_pointer p_x)
    76	{
    77	  node_pointer p_y = p_x->m_p_left;
    78	  p_x->m_p_left = p_y->m_p_right;
    79	
    80	  if (p_y->m_p_right != 0)
    81	    p_y->m_p_right->m_p_parent = p_x;
    82	
    83	  p_y->m_p_parent = p_x->m_p_parent;
    84	  if (p_x == m_p_head->m_p_parent)
    85	    m_p_head->m_p_parent = p_y;
    86	  else if (p_x == p_x->m_p_parent->m_p_right)
    87	    p_x->m_p_parent->m_p_right = p_y;
    88	  else
    89	    p_x->m_p_parent->m_p_left = p_y;
    90	
    91	  p_y->m_p_right = p_x;
    92	  p_x->m_p_parent = p_y;
    93	
    94	  _GLIBCXX_DEBUG_ONLY(assert_node_consistent(p_x);)
    95	  _GLIBCXX_DEBUG_ONLY(assert_node_consistent(p_y);)
    96	
    97	  apply_update(p_x, (Node_Update*)this);
    98	  apply_update(p_x->m_p_parent, (Node_Update*)this);
    99	}
   100	
   101	PB_DS_CLASS_T_DEC
   102	inline void
   103	PB_DS_CLASS_C_DEC::
   104	rotate_parent(node_pointer p_nd)
   105	{
   106	  node_pointer p_parent = p_nd->m_p_parent;
   107	  if (p_nd == p_parent->m_p_left)
   108	    rotate_right(p_parent);
   109	  else
   110	    rotate_left(p_parent);
   111	  _GLIBCXX_DEBUG_ASSERT(p_parent->m_p_parent = p_nd);
   112	  _GLIBCXX_DEBUG_ASSERT(p_nd->m_p_left == p_parent || p_nd->m_p_right == p_parent);
   113	}
   114	
   115	PB_DS_CLASS_T_DEC
   116	inline void
   117	PB_DS_CLASS_C_DEC::
   118	apply_update(node_pointer /*p_nd*/, __gnu_pbds::null_node_update*  /*p_update*/)
   119	{ }
   120	
   121	PB_DS_CLASS_T_DEC
   122	template<typename Node_Update_>
   123	inline void
   124	PB_DS_CLASS_C_DEC::
   125	apply_update(node_pointer p_nd, Node_Update_* p_update)
   126	{
   127	  p_update->operator()(& PB_DS_V2F(p_nd->m_value),(p_nd->m_p_left == 0) ?
   128				0 :
   129				& PB_DS_V2F(p_nd->m_p_left->m_value),(p_nd->m_p_right == 0) ?
   130				0 :
   131				& PB_DS_V2F(p_nd->m_p_right->m_value));
   132	}
   133	
   134	PB_DS_CLASS_T_DEC
   135	template<typename Node_Update_>
   136	inline void
   137	PB_DS_CLASS_C_DEC::
   138	update_to_top(node_pointer p_nd, Node_Update_* p_update)
   139	{
   140	  while (p_nd != m_p_head)
   141	    {
   142	      apply_update(p_nd, p_update);
   143	      p_nd = p_nd->m_p_parent;
   144	    }
   145	}
   146	
   147	PB_DS_CLASS_T_DEC
   148	inline void
   149	PB_DS_CLASS_C_DEC::
   150	update_to_top(node_pointer /*p_nd*/, __gnu_pbds::null_node_update*  /*p_update*/)
   151	{ }
   152	
   153	#endif