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// -*- C++ -*-

// Copyright (C) 2005, 2006, 2009 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.

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

// along with this library; see the file COPYING3.  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 text_populate.hpp

 * Contains a function for populating a vector with text words from

 *    a file.

 */

#ifndef PB_DS_TEXT_POPULATE_HPP

#define PB_DS_TEXT_POPULATE_HPP

#include <io/illegal_input_error.hpp>

#include <set>

#include <fstream>

#include <string>

#include <iostream>

namespace __gnu_pbds

{

  namespace test

  {

    template<typename Vec>

    void

    text_populate(const std::string& r_f_name, Vec& r_a_txt)

    {

      const size_t size = r_a_txt.size();

      try

        {

          std::ifstream f(r_f_name.c_str());

          if (!f.good())

            {

              std::cerr << "Cannot open file " << r_f_name.c_str() <<

                std::endl;

              throw __gnu_pbds::test::illegal_input_error();

            }

          size_t i = 0;

          while (f.good()&&  i < size)

            {

              f >> r_a_txt[i].first;

              r_a_txt[i].second = 0;

              ++i;

            }

          if (i < size)

            {

              std::cerr << "Read only " << static_cast<unsigned long>(i) <<

                " words" << std::endl;

              throw __gnu_pbds::test::illegal_input_error();

            }

        }

      catch(...)

        {

          std::cerr << "Error reading from file" << std::endl;

          throw;

        }

    }

    template<typename Vec>

    void

    distinct_text_populate(const std::string& r_f_name, Vec& r_a_txt)

    {

      const size_t size = r_a_txt.size();

      try

        {

          std::ifstream f(r_f_name.c_str());

          if (!f.good())

            {

              std::cerr << "Cannot open file " << r_f_name.c_str() <<

                std::endl;

              throw __gnu_pbds::test::illegal_input_error();

            }

          typedef std::set< typename Vec::value_type::first_type> set_t;

          set_t s;

          while (f.good()&&  s.size() < size)

            {

              typename Vec::value_type::first_type v;

              f >> v;

              if (s.find(v) == s.end())

                {

                  r_a_txt[s.size()] = std::make_pair(v, 0);

                  s.insert(v);

                }

            }

          if (s.size() < size)

            {

              std::cerr << "Read only " << static_cast<unsigned long>(s.size()) <<

                " words" << std::endl;

              throw __gnu_pbds::test::illegal_input_error();

            }

        }

      catch(...)

        {

          std::cerr << "Error reading from file" << std::endl;

          throw;

        }

    }

  } // namespace test

} // namespace __gnu_pbds

#endif // #ifndef PB_DS_TEXT_POPULATE_HPP