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Diffstat (limited to 'libstdc++-v3/include/ext/pb_ds/detail/binary_heap_/split_join_fn_imps.hpp')
| -rw-r--r-- | libstdc++-v3/include/ext/pb_ds/detail/binary_heap_/split_join_fn_imps.hpp | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/libstdc++-v3/include/ext/pb_ds/detail/binary_heap_/split_join_fn_imps.hpp b/libstdc++-v3/include/ext/pb_ds/detail/binary_heap_/split_join_fn_imps.hpp new file mode 100644 index 00000000000..20913c47d59 --- /dev/null +++ b/libstdc++-v3/include/ext/pb_ds/detail/binary_heap_/split_join_fn_imps.hpp @@ -0,0 +1,179 @@ +// -*- 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 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_DBG_ONLY(assert_valid();) + + typedef + typename entry_pred< + value_type, + Pred, + simple_value, + Allocator>::type + pred_t; + + const size_type left = partition(pred_t(pred)); + + PB_DS_DBG_ASSERT(m_size >= left); + + const size_type ersd = m_size - left; + + PB_DS_DBG_ASSERT(m_size >= ersd); + + const size_type actual_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 = NULL; + entry_pointer a_other_entries = NULL; + + try + { + a_entries = s_entry_allocator.allocate(actual_size); + + a_other_entries = s_entry_allocator.allocate(other_actual_size); + } + catch(...) + { + if (a_entries != NULL) + s_entry_allocator.deallocate(a_entries, actual_size); + + if (a_other_entries != NULL) + s_entry_allocator.deallocate(a_other_entries, other_actual_size); + + throw; + }; + + for (size_type i = 0; i < other.m_size; ++i) + erase_at(other.m_a_entries, i, s_no_throw_copies_ind); + + PB_DS_DBG_ASSERT(actual_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 = actual_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; + + std::make_heap(m_a_entries, m_a_entries + m_size, static_cast<entry_cmp& >(*this)); + std::make_heap(other.m_a_entries, other.m_a_entries + other.m_size, static_cast<entry_cmp& >(other)); + + resize_policy::notify_arbitrary(m_actual_size); + other.notify_arbitrary(other.m_actual_size); + + PB_DS_DBG_ONLY(assert_valid();) + PB_DS_DBG_ONLY(other.assert_valid();) + } + +PB_DS_CLASS_T_DEC +inline void +PB_DS_CLASS_C_DEC:: +join(PB_DS_CLASS_C_DEC& other) +{ + PB_DS_DBG_ONLY(assert_valid();) + PB_DS_DBG_ONLY(other.assert_valid();) + + const size_type size = m_size + other.m_size; + const size_type actual_size = resize_policy::get_new_size_for_arbitrary(size); + + entry_pointer a_entries = NULL; + entry_pointer a_other_entries = NULL; + + try + { + a_entries = s_entry_allocator.allocate(actual_size); + + a_other_entries = s_entry_allocator.allocate(resize_policy::min_size); + } + catch(...) + { + if (a_entries != NULL) + s_entry_allocator.deallocate(a_entries, actual_size); + + if (a_other_entries != NULL) + s_entry_allocator.deallocate(a_other_entries, resize_policy::min_size); + + throw; + } + + 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 = size; + m_actual_size = actual_size; + + resize_policy::notify_arbitrary(actual_size); + + std::make_heap(m_a_entries, m_a_entries + m_size, static_cast<entry_cmp& >(*this)); + + 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); + + PB_DS_DBG_ONLY(assert_valid();) + PB_DS_DBG_ONLY(other.assert_valid();) + } + |