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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 dna_str_limit.hpp

 * Contains a function for finding the numer of characters

 *    to access in a DNA string.

 */

#ifndef PB_DS_DNA_STR_LIMIT_HPP

#define PB_DS_DNA_STR_LIMIT_HPP

#include <string>

namespace __gnu_pbds

{

  namespace test

  {

    size_t

    dna_str_limit(size_t size)

    {

      size_t ret = 1;

      size_t calc_size = 4;

      while (calc_size < size)

        {

          ++ret;

          calc_size = calc_size << 2;

        }

      return ret;

    }

  } // namespace test

} // namespace __gnu_pbds

#endif // #ifndef PB_DS_DNA_STR_LIMIT_HPP