ov_tree_map_/erase_fn_imps.hpp
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// -*- C++ -*-
// Copyright (C) 2005-2013 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 ov_tree_map_/erase_fn_imps.hpp
* Contains an implementation class for ov_tree_.
*/
PB_DS_CLASS_T_DEC
void
PB_DS_CLASS_C_DEC::
clear()
{
PB_DS_ASSERT_VALID((*this))
if (m_size == 0)
{
return;
}
else
{
reallocate_metadata((node_update* )this, 0);
cond_dtor<size_type> cd(m_a_values, m_end_it, m_size);
}
_GLIBCXX_DEBUG_ONLY(debug_base::clear();)
m_a_values = 0;
m_size = 0;
m_end_it = m_a_values;
PB_DS_ASSERT_VALID((*this))
}
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)
{
PB_DS_ASSERT_VALID((*this))
#ifdef PB_DS_REGRESSION
typename _Alloc::group_adjustor adjust(m_size);
#endif
size_type new_size = 0;
size_type num_val_ersd = 0;
for (iterator source_it = begin(); source_it != m_end_it; ++source_it)
if (!pred(*source_it))
++new_size;
else
++num_val_ersd;
if (new_size == 0)
{
clear();
return num_val_ersd;
}
value_vector a_new_values = s_value_alloc.allocate(new_size);
iterator target_it = a_new_values;
cond_dtor<size_type> cd(a_new_values, target_it, new_size);
_GLIBCXX_DEBUG_ONLY(debug_base::clear());
for (iterator source_it = begin(); source_it != m_end_it; ++source_it)
{
if (!pred(*source_it))
{
new (const_cast<void*>(static_cast<const void*>(target_it)))
value_type(*source_it);
_GLIBCXX_DEBUG_ONLY(debug_base::insert_new(PB_DS_V2F(*source_it)));
++target_it;
}
}
reallocate_metadata((node_update*)this, new_size);
cd.set_no_action();
{
cond_dtor<size_type> cd1(m_a_values, m_end_it, m_size);
}
m_a_values = a_new_values;
m_size = new_size;
m_end_it = target_it;
update(node_begin(), (node_update*)this);
PB_DS_ASSERT_VALID((*this))
return num_val_ersd;
}
PB_DS_CLASS_T_DEC
template<typename It>
It
PB_DS_CLASS_C_DEC::
erase_imp(It it)
{
PB_DS_ASSERT_VALID((*this))
if (it == end())
return end();
PB_DS_CHECK_KEY_EXISTS(PB_DS_V2F(*it))
#ifdef PB_DS_REGRESSION
typename _Alloc::group_adjustor adjust(m_size);
#endif
_GLIBCXX_DEBUG_ASSERT(m_size > 0);
value_vector a_values = s_value_alloc.allocate(m_size - 1);
iterator source_it = begin();
iterator source_end_it = end();
iterator target_it = a_values;
iterator ret_it = end();
cond_dtor<size_type> cd(a_values, target_it, m_size - 1);
_GLIBCXX_DEBUG_ONLY(size_type cnt = 0;)
while (source_it != source_end_it)
{
if (source_it != it)
{
_GLIBCXX_DEBUG_ONLY(++cnt;)
_GLIBCXX_DEBUG_ASSERT(cnt != m_size);
new (const_cast<void*>(static_cast<const void*>(target_it)))
value_type(*source_it);
++target_it;
}
else
ret_it = target_it;
++source_it;
}
_GLIBCXX_DEBUG_ASSERT(m_size > 0);
reallocate_metadata((node_update*)this, m_size - 1);
cd.set_no_action();
_GLIBCXX_DEBUG_ONLY(debug_base::erase_existing(PB_DS_V2F(*it));)
{
cond_dtor<size_type> cd1(m_a_values, m_end_it, m_size);
}
m_a_values = a_values;
--m_size;
m_end_it = m_a_values + m_size;
update(node_begin(), (node_update*)this);
PB_DS_ASSERT_VALID((*this))
return It(ret_it);
}
PB_DS_CLASS_T_DEC
bool
PB_DS_CLASS_C_DEC::
erase(key_const_reference r_key)
{
point_iterator it = find(r_key);
if (it == end())
return false;
erase(it);
return true;
}