binary_heap_/split_join_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 binary_heap_/split_join_fn_imps.hpp
* Contains an implementation class for a binary_heap.
*/
PB_DS_CLASS_T_DEC
template<typename Pred>
void
PB_DS_CLASS_C_DEC::
split(Pred pred, PB_DS_CLASS_C_DEC& other)
{
PB_DS_ASSERT_VALID((*this))
typedef
typename entry_pred<value_type, Pred, _Alloc, simple_value>::type
pred_t;
const size_type left = partition(pred_t(pred));
_GLIBCXX_DEBUG_ASSERT(m_size >= left);
const size_type ersd = m_size - left;
_GLIBCXX_DEBUG_ASSERT(m_size >= ersd);
const size_type new_size = resize_policy::get_new_size_for_arbitrary(left);
const size_type other_actual_size = other.get_new_size_for_arbitrary(ersd);
entry_pointer a_entries = 0;
entry_pointer a_other_entries = 0;
__try
{
a_entries = s_entry_allocator.allocate(new_size);
a_other_entries = s_entry_allocator.allocate(other_actual_size);
}
__catch(...)
{
if (a_entries != 0)
s_entry_allocator.deallocate(a_entries, new_size);
if (a_other_entries != 0)
s_entry_allocator.deallocate(a_other_entries, other_actual_size);
__throw_exception_again;
};
for (size_type i = 0; i < other.m_size; ++i)
erase_at(other.m_a_entries, i, s_no_throw_copies_ind);
_GLIBCXX_DEBUG_ASSERT(new_size >= left);
std::copy(m_a_entries, m_a_entries + left, a_entries);
std::copy(m_a_entries + left, m_a_entries + m_size, a_other_entries);
s_entry_allocator.deallocate(m_a_entries, m_actual_size);
s_entry_allocator.deallocate(other.m_a_entries, other.m_actual_size);
m_actual_size = new_size;
other.m_actual_size = other_actual_size;
m_size = left;
other.m_size = ersd;
m_a_entries = a_entries;
other.m_a_entries = a_other_entries;
make_heap();
other.make_heap();
resize_policy::notify_arbitrary(m_actual_size);
other.notify_arbitrary(other.m_actual_size);
PB_DS_ASSERT_VALID((*this))
PB_DS_ASSERT_VALID(other)
}
PB_DS_CLASS_T_DEC
inline void
PB_DS_CLASS_C_DEC::
join(PB_DS_CLASS_C_DEC& other)
{
PB_DS_ASSERT_VALID((*this))
PB_DS_ASSERT_VALID(other)
const size_type len = m_size + other.m_size;
const size_type new_size = resize_policy::get_new_size_for_arbitrary(len);
entry_pointer a_entries = 0;
entry_pointer a_other_entries = 0;
__try
{
a_entries = s_entry_allocator.allocate(new_size);
a_other_entries = s_entry_allocator.allocate(resize_policy::min_size);
}
__catch(...)
{
if (a_entries != 0)
s_entry_allocator.deallocate(a_entries, new_size);
if (a_other_entries != 0)
s_entry_allocator.deallocate(a_other_entries, resize_policy::min_size);
__throw_exception_again;
}
std::copy(m_a_entries, m_a_entries + m_size, a_entries);
std::copy(other.m_a_entries, other.m_a_entries + other.m_size,
a_entries + m_size);
s_entry_allocator.deallocate(m_a_entries, m_actual_size);
m_a_entries = a_entries;
m_size = len;
m_actual_size = new_size;
resize_policy::notify_arbitrary(new_size);
make_heap();
s_entry_allocator.deallocate(other.m_a_entries, other.m_actual_size);
other.m_a_entries = a_other_entries;
other.m_size = 0;
other.m_actual_size = resize_policy::min_size;
other.notify_arbitrary(resize_policy::min_size);
other.make_heap();
PB_DS_ASSERT_VALID((*this))
PB_DS_ASSERT_VALID(other)
}