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// -*- C++ -*-

// Copyright (C) 2005, 2006, 2009, 2011 Free Software Foundation, Inc.

//

// This file is part of the GNU ISO C++ Library.  This library is free

// software; you can redistribute it and/or modify it under the terms

// of the GNU General Public License as published by the Free Software

// Foundation; either version 3, or (at your option) any later

// version.

// This library is distributed in the hope that it will be useful, but

// WITHOUT ANY WARRANTY; without even the implied warranty of

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

// General Public License for more details.

// Under Section 7 of GPL version 3, you are granted additional

// permissions described in the GCC Runtime Library Exception, version

// 3.1, as published by the Free Software Foundation.

// You should have received a copy of the GNU General Public License and

// a copy of the GCC Runtime Library Exception along with this program;

// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see

// <http://www.gnu.org/licenses/>.

// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.

// Permission to use, copy, modify, sell, and distribute this software

// is hereby granted without fee, provided that the above copyright

// notice appears in all copies, and that both that copyright notice

// and this permission notice appear in supporting documentation. None

// of the above authors, nor IBM Haifa Research Laboratories, make any

// representation about the suitability of this software for any

// purpose. It is provided "as is" without express or implied

// warranty.

/**

 * @file detail/tree_trace_base.hpp

 * Contains tree-related policies.

 */

#ifndef PB_DS_TREE_TRACE_BASE_HPP

#define PB_DS_TREE_TRACE_BASE_HPP

#ifdef PB_DS_TREE_TRACE

#include <ext/pb_ds/detail/branch_policy/branch_policy.hpp>

#include <ext/pb_ds/detail/branch_policy/null_node_metadata.hpp>

namespace __gnu_pbds

{

  namespace detail

  {

#ifdef PB_DS_TREE_TRACE

#define PB_DS_CLASS_T_DEC                                               \

    template<typename Node_CItr, typename Node_Itr,     \

             typename Cmp_Fn, bool Node_Based, typename _Alloc>

#define PB_DS_CLASS_C_DEC                                               \

    tree_trace_base<Node_CItr, Node_Itr, Cmp_Fn,         \

                    Node_Based, _Alloc>

#define PB_DS_TRACE_BASE \

    branch_policy<Node_CItr, Node_Itr, _Alloc>

    /// Tracing base class.

    template<typename Node_CItr, typename Node_Itr,

             typename Cmp_Fn, bool Node_Based, typename _Alloc>

    class tree_trace_base : private PB_DS_TRACE_BASE

    {

    public:

      void

      trace() const;

    private:

      typedef PB_DS_TRACE_BASE                  base_type;

      typedef Node_CItr                 node_const_iterator;

      typedef typename _Alloc::size_type        size_type;

      void

      trace_node(node_const_iterator, size_type) const;

      virtual bool

      empty() const = 0;

      virtual node_const_iterator

      node_begin() const = 0;

      virtual node_const_iterator

      node_end() const = 0;

      static void

      print_node_pointer(Node_CItr, integral_constant<int,true>);

      static void

      print_node_pointer(Node_CItr, integral_constant<int,false>);

      template<typename Metadata_>

      static void

      trace_it_metadata(Node_CItr, type_to_type<Metadata_>);

      static void

      trace_it_metadata(Node_CItr, type_to_type<null_type>);

    };

    PB_DS_CLASS_T_DEC

    void

    PB_DS_CLASS_C_DEC::

    trace() const

    {

      if (empty())

        return;

      trace_node(node_begin(), 0);

    }

    PB_DS_CLASS_T_DEC

    void

    PB_DS_CLASS_C_DEC::

    trace_node(node_const_iterator nd_it, size_type level) const

    {

      if (nd_it.get_r_child() != node_end())

        trace_node(nd_it.get_r_child(), level + 1);

      for (size_type i = 0; i < level; ++i)

        std::cerr << ' ';

      print_node_pointer(nd_it, integral_constant<int,Node_Based>());

      std::cerr << base_type::extract_key(*(*nd_it));

      typedef type_to_type<typename node_const_iterator::metadata_type>

        m_type_ind_t;

      trace_it_metadata(nd_it, m_type_ind_t());

      std::cerr << std::endl;

      if (nd_it.get_l_child() != node_end())

        trace_node(nd_it.get_l_child(), level + 1);

    }

    PB_DS_CLASS_T_DEC

    template<typename Metadata_>

    void

    PB_DS_CLASS_C_DEC::

    trace_it_metadata(Node_CItr nd_it, type_to_type<Metadata_>)

    {

      const unsigned long ul = static_cast<unsigned long>(nd_it.get_metadata());

      std::cerr << " (" << ul << ") ";

    }

    PB_DS_CLASS_T_DEC

    void

    PB_DS_CLASS_C_DEC::

    trace_it_metadata(Node_CItr, type_to_type<null_type>)

    { }

    PB_DS_CLASS_T_DEC

    void

    PB_DS_CLASS_C_DEC::

    print_node_pointer(Node_CItr nd_it, integral_constant<int,true>)

    { std::cerr << nd_it.m_p_nd << " "; }

    PB_DS_CLASS_T_DEC

    void

    PB_DS_CLASS_C_DEC::

    print_node_pointer(Node_CItr nd_it, integral_constant<int,false>)

    { std::cerr << *nd_it << " "; }

#undef PB_DS_CLASS_T_DEC

#undef PB_DS_CLASS_C_DEC

#undef PB_DS_TRACE_BASE

#endif // #ifdef    PB_DS_TREE_TRACE

  } // namespace detail

} // namespace __gnu_pbds

#endif // #ifdef PB_DS_TREE_TRACE

#endif // #ifndef PB_DS_TREE_TRACE_BASE_HPP