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// -*- C++ -*-

// Copyright (C) 2005 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 2, 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 COPYING.  If not, write to the Free

// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,

// USA.

// As a special exception, you may use this file as part of a free software

// library without restriction.  Specifically, if other files instantiate

// templates or use macros or inline functions from this file, or you compile

// this file and link it with other files to produce an executable, this

// file does not by itself cause the resulting executable to be covered by

// the GNU General Public License.  This exception does not however

// invalidate any other reasons why the executable file might be covered by

// the GNU General Public License.

// 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 STANDARD_POLICIES_HPP

#define STANDARD_POLICIES_HPP

#include <memory>

#include <ext/pb_assoc/hash_policy.hpp>

#include <ext/pb_assoc/lu_policy.hpp>

#include <ext/pb_assoc/tree_policy.hpp>

#if defined(__GNUC__)

#include <ext/hash_map>

#elif defined(_MSC_VER)

#include <hash_map>

#else

#error "Unable to determine the namespaces for your compiler. Please" \

        "Contact pbassoc@gmail.com"

#endif // #if defined(__GNUC__)

namespace pb_assoc

{

  namespace detail

  {

#ifdef __GNUC__

#define PB_ASSOC_HASH_NAMESPACE \

        __gnu_cxx

    template<typename Key>

    struct def_hash_fn

    {

      typedef PB_ASSOC_HASH_NAMESPACE::hash<Key> type;

    };

    template<typename Key>

    struct def_eq_fn

    {

      typedef PB_ASSOC_HASH_NAMESPACE::equal_to<Key> type;

    };

#elif defined(_MSC_VER)

    template<typename Key>

    struct hash_value_class_adapter

    {

      inline size_t

      operator()(const Key& r_key) const

      {

        return (stdext::hash_value(r_key));

      }

    };

    template<typename Key>

    struct def_hash_fn

    {

      typedef hash_value_class_adapter<Key> type;

    };

    template<typename Key>

    struct def_eq_fn

    {

      typedef std::equal_to<Key> type;

    };

#else // #elif defined(_MSC_VER)

#error Sorry, cannot determine headers, namespaces, etc. for your compiler.

#error If you encounter this error, pls write to pbassoc@gmail.com

#endif // #elif defined(_MSC_VER)

    enum

      {

        def_store_hash = false

      };

    struct def_comb_hash_fn

    {

      typedef pb_assoc::direct_mask_range_hashing<> type;

    };

    template<class Comb_Hash_Fn>

    struct def_resize_policy

    {

    private:

      typedef typename Comb_Hash_Fn::size_type size_type;

      typedef

      typename pb_assoc::detail::cond_type<

        pb_assoc::detail::is_same_type<

        pb_assoc::direct_mask_range_hashing<size_type>,

        Comb_Hash_Fn>::value,

        pb_assoc::hash_exponential_size_policy<

        size_type>,

        pb_assoc::hash_prime_size_policy>::type

      size_policy_type;

    public:

      typedef

      pb_assoc::hash_standard_resize_policy<

        size_policy_type,

        pb_assoc::hash_load_check_resize_trigger<

        false,

        size_type>,

        false,

        size_type>

      type;

    };

    struct def_update_policy

    {

      typedef pb_assoc::move_to_front_lu_policy<> type;

    };

#ifdef __GNUC__

#undef PB_ASSOC_HASH_NAMESPACE

#endif // #ifdef __GNUC__

    template<class Comb_Probe_Fn>

    struct def_probe_fn

    {

    private:

      typedef typename Comb_Probe_Fn::size_type size_type;

    public:

      typedef

      typename pb_assoc::detail::cond_type<

        pb_assoc::detail::is_same_type<

        pb_assoc::direct_mask_range_hashing<size_t>,

        Comb_Probe_Fn>::value,

        pb_assoc::linear_probe_fn<

        size_type>,

        pb_assoc::quadratic_probe_fn<

        size_type> >::type

      type;

    };

    typedef pb_assoc::null_node_updator def_node_updator;

  } // namespace detail

} // namespace pb_assoc

#endif // #ifndef STANDARD_POLICIES_HPP