testLinHash.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
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  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  SOFTWARE.
*/
 
# include <iostream>
# include <string>
# include <ctime>
# include <cstdlib>
# include <aleph.H>
# include <tpl_linHash.H>
 
/* TODO:
   1-. Test del() del iterador
 
*/
 
# include <cassert>
using namespace std;
 
# include <cassert>
using namespace Aleph;
 
struct Entry : public LinearHashTableVtl<unsigned long>::Bucket
{
  unsigned long val;
 
  Entry(unsigned long k, unsigned long v) 
    : LinearHashTableVtl<unsigned long>::Bucket(k), val( v )
    {
      /* EMPTY */
    }
};
 
void print_stats( LinearHashTableVtl<unsigned long> & table)
{
  cout << "Capacity  = " << table.capacity() << endl
       << "size       = " << table.size() << endl
       << "busy slots = " << table.busy_slots() << endl
       << "expansions = " << table.expansions() << endl
       << "alpha      = " << 1.0*table.size()/table.capacity() << endl;
}
 
int main(int argc, char *argv[])
{ 
  const unsigned long numNodes = 10000;
 
  unsigned long  i, n = numNodes;
 
  unsigned long  value;
 
  unsigned int t = std::time(NULL);
 
  try 
    {
      if (argc > 1)
  n = std::stoul(argv[1]);
 
      if (argc > 2)
  t = std::stoul(argv[2]);
    }
  catch (...)
    {
      // ignore
    }
 
  if (n <= 0)
    {
      cout << "n must be positive" << endl;
      return 1;
    }
 
  DynArray<unsigned int> keys(n);
 
  cout << "testDynamicHash " << n << " " << t << endl;
 
  srand(t);
 
  LinearHashTableVtl<unsigned long> table;
  Entry* bucket;
 
  print_stats(table);
 
  cout << "Inserting..." << endl;
 
  for (i = 0; i < n; i++)
    {
      do
  {
    value = keys[i] = (unsigned long)  (10*n*(rand() /(RAND_MAX + 1.0)));
  }
      while (table.search(value) != NULL);    
 
      cout << value << " ";
 
      bucket = new Entry (keys[i], i);
      table.insert(bucket);
    }
 
  cout << endl;
 
  table.print();
  
  print_stats(table);
 
  cout << endl << "Searching..." << endl;
 
  for (i = 0; i < n; i++)
    {
      value = keys[i];
      bucket = static_cast<Entry*>(table.search(value));
      if (bucket == NULL)
  {
    cout << endl << "Error key " << keys[i] << " not found" <<  endl;
    abort();
  }
    }
 
  cout << "Testing iterator" << endl;
 
  {
    long count = 0;
    for (LinearHashTableVtl<unsigned long>::Iterator it(table); it.has_curr();
   it.next(), ++count)
      cout << it.get_curr()->get_key() << " ";
    if (count != table.size())
      AH_ERROR("Test not passed count = %ld != %ld", count, table.size());
  }
  
  cout << endl << "testing deleting ..." << endl;
 
  try
    {
      for (i = 0; i < n; i++)
  {
    value = keys[i];
    bucket = static_cast<Entry*>(table.search(value));
    if (bucket != NULL)
      {
        table.remove(bucket);
        delete bucket;
      }
    else
      AH_ERROR("%u th key %u not found\n", (int) i, (int) keys[i]);
  }
      print_stats(table);
    }
  catch (exception& exc)
    {
      cout << exc.what() << " exception has been thrown" << endl;       
    }
  catch (...)
    {
      cout << " unknown exception has been thrown" << endl; 
    }
 
  assert(table.size() == 0);  
}