// -*- C++ -*-

// Copyright (C) 2005, 2006 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, 59 Temple Place - Suite 330, Boston,
// MA 02111-1307, 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 erase_fn_imps.hpp
 * Contains implementations of gp_ht_map_'s erase related functions.
 */

PB_DS_CLASS_T_DEC
inline void
PB_DS_CLASS_C_DEC::
erase_entry(entry_pointer p_e)
{
  _GLIBCXX_DEBUG_ASSERT(p_e->m_stat = valid_entry_status);
  _GLIBCXX_DEBUG_ONLY(map_debug_base::erase_existing(PB_DS_V2F(p_e->m_value));)
  p_e->m_value.~value_type();
  p_e->m_stat = erased_entry_status;
  _GLIBCXX_DEBUG_ASSERT(m_num_used_e > 0);
  resize_base::notify_erased(--m_num_used_e);
}

PB_DS_CLASS_T_DEC
void
PB_DS_CLASS_C_DEC::
clear()
{
  for (size_type pos = 0; pos < m_num_e; ++pos)
    {
      entry_pointer p_e = &m_entries[pos];
      if (p_e->m_stat == valid_entry_status)
	erase_entry(p_e);
    }
  do_resize_if_needed_no_throw();
  resize_base::notify_cleared();
}

PB_DS_CLASS_T_DEC
template<typename Pred>
inline typename PB_DS_CLASS_C_DEC::size_type
PB_DS_CLASS_C_DEC::
erase_if(Pred pred)
{
  _GLIBCXX_DEBUG_ONLY(PB_DS_CLASS_C_DEC::assert_valid();)
  size_type num_ersd = 0;
  for (size_type pos = 0; pos < m_num_e; ++pos)
    {
      entry_pointer p_e = &m_entries[pos];
      if (p_e->m_stat == valid_entry_status)
	if (pred(p_e->m_value))
	  {
	    ++num_ersd;
	    erase_entry(p_e);
	  }
    }

  do_resize_if_needed_no_throw();
  _GLIBCXX_DEBUG_ONLY(PB_DS_CLASS_C_DEC::assert_valid();)
  return num_ersd;
}

PB_DS_CLASS_T_DEC
inline bool
PB_DS_CLASS_C_DEC::
erase(const_key_reference r_key)
{ return erase_imp(r_key, traits_base::m_store_extra_indicator); }

#include <ext/pb_ds/detail/gp_hash_table_map_/erase_no_store_hash_fn_imps.hpp>
#include <ext/pb_ds/detail/gp_hash_table_map_/erase_store_hash_fn_imps.hpp>