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/usr/include/c++/11/ext/pb_ds/detail/tree_trace_base.hpp


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     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 detail/tree_trace_base.hpp
    38	 * Contains tree-related policies.
    39	 */
    40	
    41	#ifndef PB_DS_TREE_TRACE_BASE_HPP
    42	#define PB_DS_TREE_TRACE_BASE_HPP
    43	
    44	#ifdef PB_DS_TREE_TRACE
    45	
    46	#include <ext/pb_ds/detail/branch_policy/branch_policy.hpp>
    47	#include <ext/pb_ds/detail/branch_policy/null_node_metadata.hpp>
    48	
    49	namespace __gnu_pbds
    50	{
    51	  namespace detail
    52	  {
    53	#ifdef PB_DS_TREE_TRACE
    54	
    55	#define PB_DS_CLASS_T_DEC						\
    56	    template<typename Node_CItr, typename Node_Itr,	\
    57		     typename Cmp_Fn, bool Node_Based, typename _Alloc>
    58	
    59	#define PB_DS_CLASS_C_DEC						\
    60	    tree_trace_base<Node_CItr, Node_Itr, Cmp_Fn,         \
    61			    Node_Based, _Alloc>
    62	
    63	#define PB_DS_TRACE_BASE \
    64	    branch_policy<Node_CItr, Node_Itr, _Alloc>
    65	
    66	    /// Tracing base class.
    67	    template<typename Node_CItr, typename Node_Itr,
    68		     typename Cmp_Fn, bool Node_Based, typename _Alloc>
    69	    class tree_trace_base : private PB_DS_TRACE_BASE
    70	    {
    71	    public:
    72	      void
    73	      trace() const;
    74	
    75	    private:
    76	      typedef PB_DS_TRACE_BASE 			base_type;
    77	      typedef Node_CItr 		node_const_iterator;
    78	      typedef typename _Alloc::size_type 	size_type;
    79	
    80	      void
    81	      trace_node(node_const_iterator, size_type) const;
    82	
    83	      _GLIBCXX_NODISCARD virtual bool
    84	      empty() const = 0;
    85	
    86	      virtual node_const_iterator
    87	      node_begin() const = 0;
    88	
    89	      virtual node_const_iterator
    90	      node_end() const = 0;
    91	
    92	      static void
    93	      print_node_pointer(Node_CItr, integral_constant<int,true>);
    94	
    95	      static void
    96	      print_node_pointer(Node_CItr, integral_constant<int,false>);
    97	
    98	      template<typename Metadata_>
    99	      static void
   100	      trace_it_metadata(Node_CItr, type_to_type<Metadata_>);
   101	
   102	      static void
   103	      trace_it_metadata(Node_CItr, type_to_type<null_type>);
   104	    };
   105	
   106	    PB_DS_CLASS_T_DEC
   107	    void
   108	    PB_DS_CLASS_C_DEC::
   109	    trace() const
   110	    {
   111	      if (empty())
   112		return;
   113	      trace_node(node_begin(), 0);
   114	    }
   115	
   116	    PB_DS_CLASS_T_DEC
   117	    void
   118	    PB_DS_CLASS_C_DEC::
   119	    trace_node(node_const_iterator nd_it, size_type level) const
   120	    {
   121	      if (nd_it.get_r_child() != node_end())
   122		trace_node(nd_it.get_r_child(), level + 1);
   123	
   124	      for (size_type i = 0; i < level; ++i)
   125		std::cerr << ' ';
   126	
   127	      print_node_pointer(nd_it, integral_constant<int,Node_Based>());
   128	      std::cerr << base_type::extract_key(*(*nd_it));
   129	
   130	      typedef type_to_type<typename node_const_iterator::metadata_type>
   131		m_type_ind_t;
   132	
   133	      trace_it_metadata(nd_it, m_type_ind_t());
   134	
   135	      std::cerr << std::endl;
   136	
   137	      if (nd_it.get_l_child() != node_end())
   138		trace_node(nd_it.get_l_child(), level + 1);
   139	    }
   140	
   141	    PB_DS_CLASS_T_DEC
   142	    template<typename Metadata_>
   143	    void
   144	    PB_DS_CLASS_C_DEC::
   145	    trace_it_metadata(Node_CItr nd_it, type_to_type<Metadata_>)
   146	    {
   147	      const unsigned long ul = static_cast<unsigned long>(nd_it.get_metadata());
   148	      std::cerr << " (" << ul << ") ";
   149	    }
   150	
   151	    PB_DS_CLASS_T_DEC
   152	    void
   153	    PB_DS_CLASS_C_DEC::
   154	    trace_it_metadata(Node_CItr, type_to_type<null_type>)
   155	    { }
   156	
   157	    PB_DS_CLASS_T_DEC
   158	    void
   159	    PB_DS_CLASS_C_DEC::
   160	    print_node_pointer(Node_CItr nd_it, integral_constant<int,true>)
   161	    { std::cerr << nd_it.m_p_nd << " "; }
   162	
   163	    PB_DS_CLASS_T_DEC
   164	    void
   165	    PB_DS_CLASS_C_DEC::
   166	    print_node_pointer(Node_CItr nd_it, integral_constant<int,false>)
   167	    { std::cerr << *nd_it << " "; }
   168	
   169	#undef PB_DS_CLASS_T_DEC
   170	#undef PB_DS_CLASS_C_DEC
   171	#undef PB_DS_TRACE_BASE
   172	#endif // #ifdef    PB_DS_TREE_TRACE
   173	
   174	  } // namespace detail
   175	} // namespace __gnu_pbds
   176	
   177	#endif // #ifdef PB_DS_TREE_TRACE
   178	
   179	#endif // #ifndef PB_DS_TREE_TRACE_BASE_HPP