Subversion Repositories altor32

// -*- 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.

// 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 hash_exponential_size_policy_imp.hpp

 * Contains a resize size policy implementation.

 */

PB_DS_CLASS_T_DEC

PB_DS_CLASS_C_DEC::

hash_exponential_size_policy(size_type start_size, size_type grow_factor) :

  m_start_size(start_size),

  m_grow_factor(grow_factor)

{ }

PB_DS_CLASS_T_DEC

void

PB_DS_CLASS_C_DEC::

swap(PB_DS_CLASS_C_DEC& other)

{

  std::swap(m_start_size, other.m_start_size);

  std::swap(m_grow_factor, other.m_grow_factor);

}

PB_DS_CLASS_T_DEC

typename PB_DS_CLASS_C_DEC::size_type

PB_DS_CLASS_C_DEC::

get_nearest_larger_size(size_type size) const

{

  size_type ret = m_start_size;

  while (ret <= size)

    {

      const size_type next_ret = ret*  m_grow_factor;

      if (next_ret < ret)

        __throw_insert_error();

      ret = next_ret;

    }

  return ret;

}

PB_DS_CLASS_T_DEC

typename PB_DS_CLASS_C_DEC::size_type

PB_DS_CLASS_C_DEC::

get_nearest_smaller_size(size_type size) const

{

  size_type ret = m_start_size;

  while (true)

    {

      const size_type next_ret = ret*  m_grow_factor;

      if (next_ret < ret)

        __throw_resize_error();

      if (next_ret >= size)

        return (ret);

      ret = next_ret;

    }

  return ret;

}