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// -*- 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 cc_ht_map_.hpp

 * Contains an implementation class for cc_ht_map_.

 */

#include <utility>

#include <iterator>

#include <ext/pb_ds/detail/cond_dealtor.hpp>

#include <ext/pb_ds/tag_and_trait.hpp>

#include <ext/pb_ds/detail/hash_fn/ranged_hash_fn.hpp>

#include <ext/pb_ds/detail/types_traits.hpp>

#include <ext/pb_ds/exception.hpp>

#include <ext/pb_ds/detail/eq_fn/hash_eq_fn.hpp>

#ifdef _GLIBCXX_DEBUG

#include <ext/pb_ds/detail/debug_map_base.hpp>

#endif 

#ifdef PB_DS_HT_MAP_TRACE_

#include <iostream>

#endif 

#include <debug/debug.h>

namespace __gnu_pbds

{

  namespace detail

  {

#define PB_DS_CLASS_T_DEC \

    template<typename Key, typename Mapped, typename Hash_Fn, \

             typename Eq_Fn, typename Allocator, bool Store_Hash, \

             typename Comb_Hash_Fn, typename Resize_Policy>

#ifdef PB_DS_DATA_TRUE_INDICATOR

#define PB_DS_CLASS_NAME cc_ht_map_data_

#endif 

#ifdef PB_DS_DATA_FALSE_INDICATOR

#define PB_DS_CLASS_NAME cc_ht_map_no_data_

#endif 

#define PB_DS_CLASS_C_DEC \

    PB_DS_CLASS_NAME<Key, Mapped, Hash_Fn, Eq_Fn, Allocator,    \

                     Store_Hash, Comb_Hash_Fn, Resize_Policy>

#define PB_DS_HASH_EQ_FN_C_DEC \

    hash_eq_fn<Key, Eq_Fn, Allocator, Store_Hash>

#define PB_DS_RANGED_HASH_FN_C_DEC \

    ranged_hash_fn<Key, Hash_Fn, Allocator, Comb_Hash_Fn, Store_Hash>

#define PB_DS_TYPES_TRAITS_C_DEC \

    types_traits<Key, Mapped, Allocator, Store_Hash>

#ifdef _GLIBCXX_DEBUG

#define PB_DS_DEBUG_MAP_BASE_C_DEC \

    debug_map_base<Key, Eq_Fn, typename Allocator::template rebind<Key>::other::const_reference>

#endif 

#ifdef PB_DS_DATA_TRUE_INDICATOR

#define PB_DS_V2F(X) (X).first

#define PB_DS_V2S(X) (X).second

#endif 

#ifdef PB_DS_DATA_FALSE_INDICATOR

#define PB_DS_V2F(X) (X)

#define PB_DS_V2S(X) Mapped_Data()

#endif 

    // <011i$i0|\|-<|-|4i|\|i|\|g |-|4$|-| 74813.

    template<typename Key,

             typename Mapped,

             typename Hash_Fn,

             typename Eq_Fn,

             typename Allocator,

             bool Store_Hash,

             typename Comb_Hash_Fn,

             typename Resize_Policy >

    class PB_DS_CLASS_NAME:

#ifdef _GLIBCXX_DEBUG

      protected PB_DS_DEBUG_MAP_BASE_C_DEC,

#endif 

      public PB_DS_HASH_EQ_FN_C_DEC,

      public Resize_Policy,

      public PB_DS_RANGED_HASH_FN_C_DEC,

      public PB_DS_TYPES_TRAITS_C_DEC

    {

    private:

      typedef PB_DS_TYPES_TRAITS_C_DEC traits_base;

      typedef typename traits_base::comp_hash comp_hash;

      typedef typename traits_base::value_type value_type_;

      typedef typename traits_base::pointer pointer_;

      typedef typename traits_base::const_pointer const_pointer_;

      typedef typename traits_base::reference reference_;

      typedef typename traits_base::const_reference const_reference_;

      struct entry : public traits_base::stored_value_type

      {

        typename Allocator::template rebind<entry>::other::pointer m_p_next;

      };

      typedef cond_dealtor<entry, Allocator> cond_dealtor_t;

      typedef typename Allocator::template rebind<entry>::other entry_allocator;

      typedef typename entry_allocator::pointer entry_pointer;

      typedef typename entry_allocator::const_pointer const_entry_pointer;

      typedef typename entry_allocator::reference entry_reference;

      typedef typename entry_allocator::const_reference const_entry_reference;

      typedef typename Allocator::template rebind<entry_pointer>::other entry_pointer_allocator;

      typedef typename entry_pointer_allocator::pointer entry_pointer_array;

      typedef PB_DS_RANGED_HASH_FN_C_DEC ranged_hash_fn_base;

      typedef PB_DS_HASH_EQ_FN_C_DEC hash_eq_fn_base;

      typedef Resize_Policy resize_base;

#ifdef _GLIBCXX_DEBUG

      typedef PB_DS_DEBUG_MAP_BASE_C_DEC debug_base;

#endif 

#define PB_DS_GEN_POS std::pair<entry_pointer, typename Allocator::size_type>

#include <ext/pb_ds/detail/unordered_iterator/const_point_iterator.hpp>

#include <ext/pb_ds/detail/unordered_iterator/point_iterator.hpp>

#include <ext/pb_ds/detail/unordered_iterator/const_iterator.hpp>

#include <ext/pb_ds/detail/unordered_iterator/iterator.hpp>

#undef PB_DS_GEN_POS

    public:

      typedef Allocator allocator_type;

      typedef typename Allocator::size_type size_type;

      typedef typename Allocator::difference_type difference_type;

      typedef Hash_Fn hash_fn;

      typedef Eq_Fn eq_fn;

      typedef Comb_Hash_Fn comb_hash_fn;

      typedef Resize_Policy resize_policy;

      enum

        {

          store_hash = Store_Hash

        };

      typedef typename traits_base::key_type key_type;

      typedef typename traits_base::key_pointer key_pointer;

      typedef typename traits_base::const_key_pointer const_key_pointer;

      typedef typename traits_base::key_reference key_reference;

      typedef typename traits_base::const_key_reference const_key_reference;

      typedef typename traits_base::mapped_type mapped_type;

      typedef typename traits_base::mapped_pointer mapped_pointer;

      typedef typename traits_base::const_mapped_pointer const_mapped_pointer;

      typedef typename traits_base::mapped_reference mapped_reference;

      typedef typename traits_base::const_mapped_reference const_mapped_reference;

      typedef typename traits_base::value_type value_type;

      typedef typename traits_base::pointer pointer;

      typedef typename traits_base::const_pointer const_pointer;

      typedef typename traits_base::reference reference;

      typedef typename traits_base::const_reference const_reference;

#ifdef PB_DS_DATA_TRUE_INDICATOR

      typedef point_iterator_ point_iterator;

#endif 

#ifdef PB_DS_DATA_FALSE_INDICATOR

      typedef const_point_iterator_ point_iterator;

#endif 

      typedef const_point_iterator_ const_point_iterator;

#ifdef PB_DS_DATA_TRUE_INDICATOR

      typedef iterator_ iterator;

#endif 

#ifdef PB_DS_DATA_FALSE_INDICATOR

      typedef const_iterator_ iterator;

#endif 

      typedef const_iterator_ const_iterator;

      PB_DS_CLASS_NAME();

      PB_DS_CLASS_NAME(const Hash_Fn&);

      PB_DS_CLASS_NAME(const Hash_Fn&, const Eq_Fn&);

      PB_DS_CLASS_NAME(const Hash_Fn&, const Eq_Fn&, const Comb_Hash_Fn&);

      PB_DS_CLASS_NAME(const Hash_Fn&, const Eq_Fn&, const Comb_Hash_Fn&,

                       const Resize_Policy&);

      PB_DS_CLASS_NAME(const PB_DS_CLASS_C_DEC&);

      virtual

      ~PB_DS_CLASS_NAME();

      void

      swap(PB_DS_CLASS_C_DEC&);

      template<typename It>

      void

      copy_from_range(It, It);

      void

      initialize();

      inline size_type

      size() const;

      inline size_type

      max_size() const;

      inline bool

      empty() const;

      Hash_Fn&

      get_hash_fn();

      const Hash_Fn&

      get_hash_fn() const;

      Eq_Fn&

      get_eq_fn();

      const Eq_Fn&

      get_eq_fn() const;

      Comb_Hash_Fn&

      get_comb_hash_fn();

      const Comb_Hash_Fn&

      get_comb_hash_fn() const;

      Resize_Policy&

      get_resize_policy();

      const Resize_Policy&

      get_resize_policy() const;

      inline std::pair<point_iterator, bool>

      insert(const_reference r_val)

      { return insert_imp(r_val, traits_base::m_store_extra_indicator); }

      inline mapped_reference

      operator[](const_key_reference r_key)

      {

#ifdef PB_DS_DATA_TRUE_INDICATOR

        return (subscript_imp(r_key, traits_base::m_store_extra_indicator));

#else 

        insert(r_key);

        return traits_base::s_null_mapped;

#endif 

      }

      inline point_iterator

      find(const_key_reference);

      inline const_point_iterator

      find(const_key_reference) const;

      inline point_iterator

      find_end();

      inline const_point_iterator

      find_end() const;

      inline bool

      erase(const_key_reference);

      template<typename Pred>

      inline size_type

      erase_if(Pred);

      void

      clear();

      inline iterator

      begin();

      inline const_iterator

      begin() const;

      inline iterator

      end();

      inline const_iterator

      end() const;

#ifdef _GLIBCXX_DEBUG

      void

      assert_valid() const;

#endif 

#ifdef PB_DS_HT_MAP_TRACE_

      void

      trace() const;

#endif 

    private:

      void

      deallocate_all();

      inline bool

      do_resize_if_needed();

      inline void

      do_resize_if_needed_no_throw();

      void

      resize_imp(size_type new_size);

      void

      do_resize(size_type new_size);

      void

      resize_imp_no_exceptions(size_type, entry_pointer_array, size_type);

      inline entry_pointer

      resize_imp_no_exceptions_reassign_pointer(entry_pointer, entry_pointer_array, false_type);

      inline entry_pointer

      resize_imp_no_exceptions_reassign_pointer(entry_pointer, entry_pointer_array, true_type);

      void

      deallocate_links_in_list(entry_pointer);

      inline entry_pointer

      get_entry(const_reference, false_type);

      inline entry_pointer

      get_entry(const_reference, true_type);

      inline void

      rels_entry(entry_pointer);

#ifdef PB_DS_DATA_TRUE_INDICATOR

      inline mapped_reference

      subscript_imp(const_key_reference r_key, false_type)

      {

        _GLIBCXX_DEBUG_ONLY(assert_valid();)

        const size_type pos = ranged_hash_fn_base::operator()(r_key);

        entry_pointer p_e = m_entries[pos];

        resize_base::notify_insert_search_start();

        while (p_e != NULL

               && !hash_eq_fn_base::operator()(p_e->m_value.first, r_key))

          {

            resize_base::notify_insert_search_collision();

            p_e = p_e->m_p_next;

          }

        resize_base::notify_insert_search_end();

        if (p_e != NULL)

          {

            _GLIBCXX_DEBUG_ONLY(debug_base::check_key_exists(r_key);)

            return (p_e->m_value.second);

          }

        _GLIBCXX_DEBUG_ONLY(debug_base::check_key_does_not_exist(r_key);)

        return insert_new_imp(value_type(r_key, mapped_type()), pos)->second;

      }

      inline mapped_reference

      subscript_imp(const_key_reference r_key, true_type)

      {

        _GLIBCXX_DEBUG_ONLY(assert_valid();)

        comp_hash pos_hash_pair = ranged_hash_fn_base::operator()(r_key);

        entry_pointer p_e = m_entries[pos_hash_pair.first];

        resize_base::notify_insert_search_start();

        while (p_e != NULL &&

               !hash_eq_fn_base::operator()(p_e->m_value.first, p_e->m_hash, r_key, pos_hash_pair.second))

          {

            resize_base::notify_insert_search_collision();

            p_e = p_e->m_p_next;

          }

        resize_base::notify_insert_search_end();

        if (p_e != NULL)

          {

            _GLIBCXX_DEBUG_ONLY(debug_base::check_key_exists(r_key);)

            return p_e->m_value.second;

          }

        _GLIBCXX_DEBUG_ONLY(debug_base::check_key_does_not_exist(r_key);)

        return insert_new_imp(value_type(r_key, mapped_type()),

                              pos_hash_pair)->second;

      }

#endif 

      inline std::pair<point_iterator, bool>

      insert_imp(const_reference, false_type);

      inline std::pair<point_iterator, bool>

      insert_imp(const_reference, true_type);

      inline pointer

      insert_new_imp(const_reference r_val, size_type pos)

      {

        if (do_resize_if_needed())

          pos = ranged_hash_fn_base::operator()(PB_DS_V2F(r_val));

        // Following lines might throw an exception.

        entry_pointer p_e = get_entry(r_val, traits_base::m_no_throw_copies_indicator);

        // At this point no exceptions can be thrown.

        p_e->m_p_next = m_entries[pos];

        m_entries[pos] = p_e;

        resize_base::notify_inserted(++m_num_used_e);

        _GLIBCXX_DEBUG_ONLY(debug_base::insert_new(PB_DS_V2F(r_val));)

        _GLIBCXX_DEBUG_ONLY(assert_valid();)

        return &p_e->m_value;

      }

      inline pointer

      insert_new_imp(const_reference r_val, comp_hash& r_pos_hash_pair)

      {

        // Following lines might throw an exception.

        if (do_resize_if_needed())

          r_pos_hash_pair = ranged_hash_fn_base::operator()(PB_DS_V2F(r_val));

        entry_pointer p_e = get_entry(r_val, traits_base::m_no_throw_copies_indicator);

        // At this point no exceptions can be thrown.

        p_e->m_hash = r_pos_hash_pair.second;

        p_e->m_p_next = m_entries[r_pos_hash_pair.first];

        m_entries[r_pos_hash_pair.first] = p_e;

        resize_base::notify_inserted(++m_num_used_e);

        _GLIBCXX_DEBUG_ONLY(debug_base::insert_new(PB_DS_V2F(r_val));)

        _GLIBCXX_DEBUG_ONLY(assert_valid();)

        return &p_e->m_value;

      }

      inline pointer

      find_key_pointer(const_key_reference r_key, false_type)

      {

        entry_pointer p_e = m_entries[ranged_hash_fn_base::operator()(r_key)];

        resize_base::notify_find_search_start();

        while (p_e != NULL &&

               !hash_eq_fn_base::operator()(PB_DS_V2F(p_e->m_value), r_key))

          {

            resize_base::notify_find_search_collision();

            p_e = p_e->m_p_next;

          }

        resize_base::notify_find_search_end();

#ifdef _GLIBCXX_DEBUG

        if (p_e == NULL)

          debug_base::check_key_does_not_exist(r_key);

        else

          debug_base::check_key_exists(r_key);

#endif 

        return &p_e->m_value;

      }

      inline pointer

      find_key_pointer(const_key_reference r_key, true_type)

      {

        comp_hash pos_hash_pair = ranged_hash_fn_base::operator()(r_key);

        entry_pointer p_e = m_entries[pos_hash_pair.first];

        resize_base::notify_find_search_start();

        while (p_e != NULL &&

               !hash_eq_fn_base::operator()(PB_DS_V2F(p_e->m_value),

                                            p_e->m_hash,

                                            r_key, pos_hash_pair.second))

          {

            resize_base::notify_find_search_collision();

            p_e = p_e->m_p_next;

          }

        resize_base::notify_find_search_end();

#ifdef _GLIBCXX_DEBUG

        if (p_e == NULL)

          debug_base::check_key_does_not_exist(r_key);

        else

          debug_base::check_key_exists(r_key);

#endif 

        return &p_e->m_value;

      }

      inline bool

      erase_in_pos_imp(const_key_reference, size_type);

      inline bool

      erase_in_pos_imp(const_key_reference, const comp_hash&);

      inline void

      erase_entry_pointer(entry_pointer&);

#ifdef PB_DS_DATA_TRUE_INDICATOR

      void

      inc_it_state(pointer& r_p_value,

                   std::pair<entry_pointer, size_type>& r_pos) const

      {

        inc_it_state((const_mapped_pointer& )r_p_value, r_pos);

      }

#endif 

      void

      inc_it_state(const_pointer& r_p_value,

                   std::pair<entry_pointer, size_type>& r_pos) const

      {

        _GLIBCXX_DEBUG_ASSERT(r_p_value != NULL);

        r_pos.first = r_pos.first->m_p_next;

        if (r_pos.first != NULL)

          {

            r_p_value = &r_pos.first->m_value;

            return;

          }

        for (++r_pos.second; r_pos.second < m_num_e; ++r_pos.second)

          if (m_entries[r_pos.second] != NULL)

            {

              r_pos.first = m_entries[r_pos.second];

              r_p_value = &r_pos.first->m_value;

              return;

            }

        r_p_value = NULL;

      }

      void

      get_start_it_state(pointer& r_p_value,

                         std::pair<entry_pointer, size_type>& r_pos) const

      {

        for (r_pos.second = 0; r_pos.second < m_num_e; ++r_pos.second)

          if (m_entries[r_pos.second] != NULL)

            {

              r_pos.first = m_entries[r_pos.second];

              r_p_value = &r_pos.first->m_value;

              return;

            }

        r_p_value = NULL;

      }

#ifdef _GLIBCXX_DEBUG

      void

      assert_entry_pointer_array_valid(const entry_pointer_array) const;

      void

      assert_entry_pointer_valid(const entry_pointer, true_type) const;

      void

      assert_entry_pointer_valid(const entry_pointer, false_type) const;

#endif 

#ifdef PB_DS_HT_MAP_TRACE_

      void

      trace_list(const_entry_pointer) const;

#endif 

    private:

#ifdef PB_DS_DATA_TRUE_INDICATOR

      friend class iterator_;

#endif 

      friend class const_iterator_;

      static entry_allocator            s_entry_allocator;

      static entry_pointer_allocator    s_entry_pointer_allocator;

      static iterator                   s_end_it;

      static const_iterator             s_const_end_it;

      static point_iterator             s_find_end_it;

      static const_point_iterator       s_const_find_end_it;

      size_type                         m_num_e;

      size_type                         m_num_used_e;

      entry_pointer_array               m_entries;

      enum

        {

          store_hash_ok = !Store_Hash

                          || !is_same<Hash_Fn, __gnu_pbds::null_hash_fn>::value

        };

      PB_DS_STATIC_ASSERT(sth, store_hash_ok);

    };

#include <ext/pb_ds/detail/cc_hash_table_map_/constructor_destructor_fn_imps.hpp>

#include <ext/pb_ds/detail/cc_hash_table_map_/entry_list_fn_imps.hpp>

#include <ext/pb_ds/detail/cc_hash_table_map_/find_fn_imps.hpp>

#include <ext/pb_ds/detail/cc_hash_table_map_/resize_fn_imps.hpp>

#include <ext/pb_ds/detail/cc_hash_table_map_/debug_fn_imps.hpp>

#include <ext/pb_ds/detail/cc_hash_table_map_/size_fn_imps.hpp>

#include <ext/pb_ds/detail/cc_hash_table_map_/policy_access_fn_imps.hpp>

#include <ext/pb_ds/detail/cc_hash_table_map_/erase_fn_imps.hpp>

#include <ext/pb_ds/detail/cc_hash_table_map_/iterators_fn_imps.hpp>

#include <ext/pb_ds/detail/cc_hash_table_map_/insert_fn_imps.hpp>

#include <ext/pb_ds/detail/cc_hash_table_map_/trace_fn_imps.hpp>

#undef PB_DS_CLASS_T_DEC

#undef PB_DS_CLASS_C_DEC

#undef PB_DS_HASH_EQ_FN_C_DEC

#undef PB_DS_RANGED_HASH_FN_C_DEC

#undef PB_DS_TYPES_TRAITS_C_DEC

#undef PB_DS_DEBUG_MAP_BASE_C_DEC

#undef PB_DS_CLASS_NAME

#undef PB_DS_V2F

#undef PB_DS_V2S

  } // namespace detail

} // namespace __gnu_pbds