testBinTree.C

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/* Aleph-w
 
     / \  | | ___ _ __ | |__      __      __
    / _ \ | |/ _ \ '_ \| '_ \ ____\ \ /\ / / Data structures & Algorithms
   / ___ \| |  __/ |_) | | | |_____\ V  V /  version 1.9c
  /_/   \_\_|\___| .__/|_| |_|      \_/\_/   https://github.com/lrleon/Aleph-w
                 |_|         
 
  This file is part of Aleph-w library
 
  Copyright (c) 2002-2018 Leandro Rabindranath Leon 
 
  Permission is hereby granted, free of charge, to any person obtaining a copy
  of this software and associated documentation files (the "Software"), to deal
  in the Software without restriction, including without limitation the rights
  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  copies of the Software, and to permit persons to whom the Software is
  furnished to do so, subject to the following conditions:
 
  The above copyright notice and this permission notice shall be included in all
  copies or substantial portions of the Software.
 
  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  SOFTWARE.
*/
# include <ctime>
# include <cstdlib>
# include <cassert>
# include <iostream>
# include <vector>
# include <algorithm>
# include <random>
# include <memory>
 
# include <aleph.H>
# include <tpl_binTree.H>
# include <tpl_tree_node.H>
# include <generate_tree.H>
 
# include <gsl/gsl_rng.h>
 
using namespace std;
using namespace Aleph;
 
struct GslRngDeleter
{
  void operator()(gsl_rng * r) const { gsl_rng_free(r); }
};
 
using GslRngHandle = std::unique_ptr<gsl_rng, GslRngDeleter>;
 
static void printNode(BinTree<int>::Node* node, int, int)
{
  cout << node->get_key() << " ";
}
 
 
struct Write
{
  string operator () (Tree_Node<int> * p)
  {
    return to_string(p->get_key());
  }
};
 
void print_forest_par(Tree_Node<int> * p)
{
  cout << "(" << p->get_key();
  p->for_each_child([](auto c) { print_forest_par(c); });
  cout << ")";
}
 
void print_forest_deway(Tree_Node<int> * p, const string & idx)
{
  cout << "(" << idx << ":" << p->get_key() << ")";
  size_t counter = 1;
  p->for_each_child([&idx, &counter](auto c) {
      stringstream s;
      s << idx << '.' << counter++;
      print_forest_deway(c, s.str());
    });
}
 
int main(int argc, char *argv[])
{
  int n = argc > 1 ? stoi(argv[1]) : 1000;
 
  unsigned int t = std::time(0);
 
  if (argc > 2)
    t = stoi(argv[2]);
 
  GslRngHandle rng(gsl_rng_alloc(gsl_rng_mt19937));
  gsl_rng_set(rng.get(), t);
 
  cout << argv[0] << " " << n << " " << t << endl;
 
  BinTree<int>  tree;
 
  int ins_count = 0;
 
  // Validate input to prevent infinite loops
  if (n > 1000)
    {
      cerr << "Error: n must be <= 1000 to avoid infinite loops with current RNG range." << endl;
      return 1;
    }
 
  cout << "Inserting " << n << " random values in tree ...\n";
 
  for (int i = 0; i < n; i++)
    {
      int value;
      BinTree<int>::Node *node;
      do 
  {
    value = gsl_rng_uniform_int(rng.get(), 1000);
    node = tree.search(value);
  }
      while (node not_eq nullptr);
      
      node = new BinTree<int>::Node (value);
      tree.insert(node);
      ins_count++;
 
      cout << value << " ";
    }
  cout << endl << endl;
 
  Tree_Node<int> * ttree = 
    bin_to_forest<Tree_Node<int>, BinTree<int>::Node>(tree.getRoot());
 
  // Check if forest conversion succeeded before proceeding
  if (ttree == nullptr)
    {
      cout << "Warning: Empty tree, no forest to process." << endl;
      return 0;
    }
 
  generate_forest<Tree_Node<int>, Write> (ttree, std::cout);
 
  cout << endl << "Secuencia paréntesis: ";  
  print_forest_par(ttree);
  auto rc = ttree->get_right_sibling();
  while (rc != nullptr)
    {
      print_forest_par(rc);
      rc = rc->get_right_sibling();
    }
  cout << endl << endl;
 
  cout << "Secuencia en notación Deway: ";
  print_forest_deway(ttree, "1");
  rc = ttree->get_right_sibling();
  size_t counter = 2;
  while (rc != nullptr)
    {
      stringstream s;
      s << counter++;
      print_forest_deway(rc, s.str());
      rc = rc->get_right_sibling();
    }
  cout << endl;
 
  destroy_forest(ttree);
 
  assert(tree.verifyBin());
  cout << endl << ins_count << " insertions" << endl
       << "prefijo: " << endl;
  preOrderRec(tree.getRoot(), printNode);
  cout << endl << endl;
 
  cout << "sufijo: " << endl;
  postOrderRec(tree.getRoot(), printNode);
  cout << endl << endl;
 
  cout << "infijo: " << endl;
  inOrderRec(tree.getRoot(), printNode);
  cout << endl << endl;
 
  cout << "Code = " << code(tree.getRoot()) << endl;
 
  int ipl = internal_path_length(tree.getRoot());
  
  cout << "IPL = " << ipl << endl
       << "EPL = " << ipl + 2*n << endl;
 
  BinTree<int>::Node * t1 = nullptr, * t2 = nullptr;
 
  BinTree<int>::Node * aux;
  aux = copyRec(tree.getRoot());
 
  split_key(aux, 487, t1, t2);
  cout << "t1: ";
  preOrderRec(t1, printNode); cout << endl << endl;
  cout << "t2: ";
  preOrderRec(t2, printNode); cout << endl << endl;
 
  int del_count = 0;
 
  cout << "Removing " << n/4 << " keys" << endl;
 
  std::vector<int> keys;
  Aleph::for_each_in_order<BinTree<int>::Node>(tree.getRoot(), [&keys](auto node) {
      keys.push_back(node->get_key());
  });
  std::shuffle(keys.begin(), keys.end(), std::mt19937(t));
 
  for (size_t i = 0; i < (size_t)(n/4) && i < keys.size(); i++)
    {
      int value = keys[i];
      BinTree<int>::Node * node = tree.remove(value);
      if (node != nullptr)
  {
    del_count++;
    cout << node->get_key() << " ";
    delete node;
  }
    }
  
  cout << endl << del_count << " deletions" << endl
       << "prefijo: ";
  preOrderRec(tree.getRoot(), printNode);
  cout << endl;
  cout << endl;
 
  assert(tree.verifyBin());
 
  destroyRec(tree.getRoot());
  destroyRec(t1);
  destroyRec(t2);
 
  cout << argv[0] << " " << n << " " << t << endl;
  }