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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libstdc++-v3/include/ext/pb_ds/detail/pairing_heap_/split_join_fn_imps.hpp | |
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Diffstat (limited to 'libstdc++-v3/include/ext/pb_ds/detail/pairing_heap_/split_join_fn_imps.hpp')
-rw-r--r-- | libstdc++-v3/include/ext/pb_ds/detail/pairing_heap_/split_join_fn_imps.hpp | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/libstdc++-v3/include/ext/pb_ds/detail/pairing_heap_/split_join_fn_imps.hpp b/libstdc++-v3/include/ext/pb_ds/detail/pairing_heap_/split_join_fn_imps.hpp new file mode 100644 index 000000000..1e6138c38 --- /dev/null +++ b/libstdc++-v3/include/ext/pb_ds/detail/pairing_heap_/split_join_fn_imps.hpp @@ -0,0 +1,140 @@ +// -*- C++ -*- + +// Copyright (C) 2005, 2006, 2009, 2010 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 split_join_fn_imps.hpp + * Contains an implementation class for a pairing heap. + */ + +PB_DS_CLASS_T_DEC +template<typename Pred> +void +PB_DS_CLASS_C_DEC:: +split(Pred pred, PB_DS_CLASS_C_DEC& other) +{ + _GLIBCXX_DEBUG_ONLY(assert_valid();) + _GLIBCXX_DEBUG_ONLY(other.assert_valid();) + + other.clear(); + + if (base_type::empty()) + { + _GLIBCXX_DEBUG_ONLY(assert_valid();) + _GLIBCXX_DEBUG_ONLY(other.assert_valid();) + + return; + } + + base_type::to_linked_list(); + + node_pointer p_out = base_type::prune(pred); + + while (p_out != 0) + { + _GLIBCXX_DEBUG_ASSERT(base_type::m_size > 0); + --base_type::m_size; + + ++other.m_size; + + node_pointer p_next = p_out->m_p_next_sibling; + + p_out->m_p_l_child = p_out->m_p_next_sibling = p_out->m_p_prev_or_parent = 0; + + other.push_imp(p_out); + + p_out = p_next; + } + + _GLIBCXX_DEBUG_ONLY(other.assert_valid();) + + node_pointer p_cur = base_type::m_p_root; + + base_type::m_p_root = 0; + + while (p_cur != 0) + { + node_pointer p_next = p_cur->m_p_next_sibling; + + p_cur->m_p_l_child = p_cur->m_p_next_sibling = p_cur->m_p_prev_or_parent = 0; + + push_imp(p_cur); + + p_cur = p_next; + } + + _GLIBCXX_DEBUG_ONLY(assert_valid();) + _GLIBCXX_DEBUG_ONLY(other.assert_valid();) + } + +PB_DS_CLASS_T_DEC +inline void +PB_DS_CLASS_C_DEC:: +join(PB_DS_CLASS_C_DEC& other) +{ + _GLIBCXX_DEBUG_ONLY(assert_valid();) + _GLIBCXX_DEBUG_ONLY(other.assert_valid();) + + if (other.m_p_root == 0) + { + _GLIBCXX_DEBUG_ONLY(assert_valid();) + _GLIBCXX_DEBUG_ONLY(other.assert_valid();) + + return; + } + + if (base_type::m_p_root == 0) + base_type::m_p_root = other.m_p_root; + else if (Cmp_Fn::operator()(base_type::m_p_root->m_value, other.m_p_root->m_value)) + { + base_type::make_child_of(base_type::m_p_root, other.m_p_root); + _GLIBCXX_DEBUG_ONLY(base_type::assert_node_consistent(other.m_p_root, false)); + + base_type::m_p_root = other.m_p_root; + } + else + { + base_type::make_child_of(other.m_p_root, base_type::m_p_root); + _GLIBCXX_DEBUG_ONLY(base_type::assert_node_consistent(base_type::m_p_root, false)); + } + + base_type::m_size += other.m_size; + + other.m_p_root = 0; + other.m_size = 0; + + _GLIBCXX_DEBUG_ONLY(assert_valid();) + _GLIBCXX_DEBUG_ONLY(other.assert_valid();) + } + |