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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 insert_store_hash_fn_imps.hpp

 * Contains implementations of gp_ht_map_'s find related functions, when the hash

 *      value is stored.

 */

PB_ASSOC_CLASS_T_DEC

inline typename PB_ASSOC_CLASS_C_DEC::comp_hash

PB_ASSOC_CLASS_C_DEC::

find_ins_pos(const_key_reference r_key, int_to_type<true>)

{

  PB_ASSOC_DBG_ONLY(PB_ASSOC_CLASS_C_DEC::assert_valid();)

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

  size_type i;

  /* The insertion position is initted to a non-legal value to indicate

   *    that it has not been initted yet.

   */

  size_type ins_pos = m_num_e;

  my_resize_base::notify_insert_search_start();

  for (i = 0; i < m_num_e; ++i)

    {

      const size_type pos =

        my_ranged_probe_fn_base::operator()(r_key, pos_hash_pair.second, i);

      entry* const p_e = m_a_entries + pos;

      switch(p_e->m_stat)

        {

        case EMPTY_ENTRY_STATUS:

          {

            my_resize_base::notify_insert_search_end();

            PB_ASSOC_DBG_ONLY(

                              my_map_debug_base::check_key_does_not_exist(r_key);)

              return ((ins_pos == m_num_e)?

                      std::make_pair(pos, pos_hash_pair.second) :

                      std::make_pair(ins_pos, pos_hash_pair.second));

          }

          break;

        case ERASED_ENTRY_STATUS:

          if (ins_pos == m_num_e)

            ins_pos = pos;

          break;

        case VALID_ENTRY_STATUS:

          if (my_hash_eq_fn_base::operator()(

                                             PB_ASSOC_V2F(p_e->m_value),

                                             p_e->m_hash,

                                             r_key,

                                             pos_hash_pair.second))

            {

              my_resize_base::notify_insert_search_end();

              PB_ASSOC_DBG_ONLY(my_map_debug_base::check_key_exists(r_key);)

                return (std::make_pair(pos, pos_hash_pair.second));

            }

          break;

        default:

          PB_ASSOC_DBG_ASSERT(0);

        };

      my_resize_base::notify_insert_search_collision();

    }

  my_resize_base::notify_insert_search_end();

  if (ins_pos == m_num_e)

    throw cannot_insert();

  return (std::make_pair(ins_pos, pos_hash_pair.second));

}

PB_ASSOC_CLASS_T_DEC

inline typename PB_ASSOC_CLASS_C_DEC::data_reference

PB_ASSOC_CLASS_C_DEC::

subscript_imp(const_key_reference r_key, int_to_type<true>)

{

  PB_ASSOC_DBG_ONLY(assert_valid();)

    comp_hash pos_hash_pair =

    find_ins_pos(r_key, my_hash_traits_base::s_store_hash_indicator);

  if (m_a_entries[pos_hash_pair.first].m_stat != VALID_ENTRY_STATUS)

    return (insert_new_imp(

                           value_type(r_key, Data()), pos_hash_pair)->second);

  PB_ASSOC_DBG_ONLY(my_map_debug_base::check_key_exists(r_key));

  return ((m_a_entries + pos_hash_pair.first)->m_value.second);

}

PB_ASSOC_CLASS_T_DEC

inline std::pair<typename PB_ASSOC_CLASS_C_DEC::find_iterator, bool>

PB_ASSOC_CLASS_C_DEC::

insert_imp(const_reference r_val, int_to_type<true>)

{

  const_key_reference r_key = PB_ASSOC_V2F(r_val);

  comp_hash pos_hash_pair =

    find_ins_pos(r_key, my_hash_traits_base::s_store_hash_indicator);

  entry_pointer p_e =& m_a_entries[pos_hash_pair.first];

  if (p_e->m_stat == VALID_ENTRY_STATUS)

    {

      PB_ASSOC_DBG_ONLY(my_map_debug_base::check_key_exists(r_key));

      return (std::make_pair(&p_e->m_value, false));

    }

  PB_ASSOC_DBG_ONLY(my_map_debug_base::check_key_does_not_exist(r_key));

  return (std::make_pair(

                         insert_new_imp(r_val, pos_hash_pair),

                         true));

}

PB_ASSOC_CLASS_T_DEC

inline typename PB_ASSOC_CLASS_C_DEC::pointer

PB_ASSOC_CLASS_C_DEC::

insert_new_imp(const_reference r_val, comp_hash& r_pos_hash_pair)

{

  PB_ASSOC_DBG_ASSERT(m_a_entries[r_pos_hash_pair.first].m_stat !=

                      VALID_ENTRY_STATUS);

  if (do_resize_if_needed())

    r_pos_hash_pair = find_ins_pos(

                                   PB_ASSOC_V2F(r_val),

                                   my_hash_traits_base::s_store_hash_indicator);

  PB_ASSOC_DBG_ASSERT(m_a_entries[r_pos_hash_pair.first].m_stat !=

                      VALID_ENTRY_STATUS);

  entry* const p_e = m_a_entries + r_pos_hash_pair.first;

  new (&p_e->m_value) value_type(r_val);

  p_e->m_hash = r_pos_hash_pair.second;

  p_e->m_stat = VALID_ENTRY_STATUS;

  my_resize_base::notify_inserted(++m_num_used_e);

  PB_ASSOC_DBG_ONLY(my_map_debug_base::insert_new(p_e->m_value.first);)

    PB_ASSOC_DBG_ONLY(assert_valid();)

    return (static_cast<pointer>(&p_e->m_value));

}