Subversion Repositories openrisc_2011-10-31

// -*- C++ -*-

// Copyright (C) 2005, 2006, 2007, 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 standard_policies.hpp

 * Contains standard policies for containers.

 */

#ifndef PB_DS_STANDARD_POLICIES_HPP

#define PB_DS_STANDARD_POLICIES_HPP

#include <memory>

#include <ext/pb_ds/hash_policy.hpp>

#include <ext/pb_ds/list_update_policy.hpp>

#include <ext/pb_ds/tree_policy.hpp>

#include <ext/pb_ds/detail/basic_tree_policy/null_node_metadata.hpp>

#include <ext/pb_ds/trie_policy.hpp>

#include <ext/pb_ds/tag_and_trait.hpp>

#include <tr1/functional>

namespace __gnu_pbds

{

  namespace detail

  {

    template<typename Key>

    struct default_hash_fn

    {

      typedef std::tr1::hash<Key> type;

    };

    template<typename Key>

    struct default_eq_fn

    {

      typedef std::equal_to<Key> type;

    };

    enum

      {

        default_store_hash = false

      };

    struct default_comb_hash_fn

    {

      typedef __gnu_pbds::direct_mask_range_hashing<> type;

    };

    template<typename Comb_Hash_Fn>

    struct default_resize_policy

    {

    private:

      typedef typename Comb_Hash_Fn::size_type size_type;

      typedef __gnu_pbds::direct_mask_range_hashing<size_type> default_fn;

      typedef is_same<default_fn, Comb_Hash_Fn> same_type;

      typedef __gnu_pbds::hash_exponential_size_policy<size_type> iftrue;

      typedef __gnu_pbds::hash_prime_size_policy iffalse;

      typedef __conditional_type<same_type::value, iftrue, iffalse> cond_type;

      typedef typename cond_type::__type size_policy_type;

      typedef __gnu_pbds::hash_load_check_resize_trigger<false, size_type> trigger;

    public:

      typedef __gnu_pbds::hash_standard_resize_policy<size_policy_type, trigger, false, size_type> type;

    };

    struct default_update_policy

    {

      typedef __gnu_pbds::move_to_front_lu_policy<> type;

    };

    template<typename Comb_Probe_Fn>

    struct default_probe_fn

    {

    private:

      typedef typename Comb_Probe_Fn::size_type size_type;

      typedef __gnu_pbds::direct_mask_range_hashing<size_type> default_fn;

      typedef is_same<default_fn, Comb_Probe_Fn> same_type;

      typedef __gnu_pbds::linear_probe_fn<size_type> iftrue;

      typedef __gnu_pbds::quadratic_probe_fn<size_type> iffalse;

      typedef __conditional_type<same_type::value, iftrue, iffalse> cond_type;

    public:

      typedef typename cond_type::__type type;

    };

    template<typename Key>

    struct default_trie_e_access_traits;

    template<typename Char, class Char_Traits>

    struct default_trie_e_access_traits<std::basic_string<Char, Char_Traits, std::allocator<char> > >

    {

    private:

      typedef std::basic_string<Char, Char_Traits, std::allocator<char> > string_type;

    public:

      typedef __gnu_pbds::string_trie_e_access_traits<string_type> type;

    };

  } // namespace detail

} // namespace __gnu_pbds

#endif // #ifndef PB_DS_STANDARD_POLICIES_HPP