| // -*- C++ -*- |
| |
| // Copyright (C) 2005, 2006, 2009 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 rc.hpp |
| * Contains a redundant (binary counter). |
| */ |
| |
| #ifndef PB_DS_RC_HPP |
| #define PB_DS_RC_HPP |
| |
| namespace __gnu_pbds |
| { |
| namespace detail |
| { |
| |
| #define PB_DS_CLASS_T_DEC \ |
| template<typename Node, class Allocator> |
| |
| #define PB_DS_CLASS_C_DEC \ |
| rc<Node, Allocator> |
| |
| template<typename Node, class Allocator> |
| class rc |
| { |
| private: |
| typedef Allocator allocator_type; |
| |
| typedef typename allocator_type::size_type size_type; |
| |
| typedef Node node; |
| |
| typedef |
| typename allocator_type::template rebind< |
| node>::other::pointer |
| node_pointer; |
| |
| typedef |
| typename allocator_type::template rebind< |
| node_pointer>::other::pointer |
| entry_pointer; |
| |
| typedef |
| typename allocator_type::template rebind< |
| node_pointer>::other::const_pointer |
| const_entry_pointer; |
| |
| enum |
| { |
| max_entries = sizeof(size_type) << 3 |
| }; |
| |
| public: |
| typedef node_pointer entry; |
| |
| typedef const_entry_pointer const_iterator; |
| |
| public: |
| rc(); |
| |
| rc(const PB_DS_CLASS_C_DEC& other); |
| |
| inline void |
| swap(PB_DS_CLASS_C_DEC& other); |
| |
| inline void |
| push(entry p_nd); |
| |
| inline node_pointer |
| top() const; |
| |
| inline void |
| pop(); |
| |
| inline bool |
| empty() const; |
| |
| inline size_type |
| size() const; |
| |
| void |
| clear(); |
| |
| const const_iterator |
| begin() const; |
| |
| const const_iterator |
| end() const; |
| |
| #ifdef _GLIBCXX_DEBUG |
| void |
| assert_valid() const; |
| #endif |
| |
| #ifdef PB_DS_RC_BINOMIAL_HEAP_TRACE_ |
| void |
| trace() const; |
| #endif |
| |
| private: |
| node_pointer m_a_entries[max_entries]; |
| |
| size_type m_over_top; |
| }; |
| |
| PB_DS_CLASS_T_DEC |
| PB_DS_CLASS_C_DEC:: |
| rc() : m_over_top(0) |
| { _GLIBCXX_DEBUG_ONLY(assert_valid();) } |
| |
| PB_DS_CLASS_T_DEC |
| PB_DS_CLASS_C_DEC:: |
| rc(const PB_DS_CLASS_C_DEC& other) : m_over_top(0) |
| { _GLIBCXX_DEBUG_ONLY(assert_valid();) } |
| |
| PB_DS_CLASS_T_DEC |
| inline void |
| PB_DS_CLASS_C_DEC:: |
| swap(PB_DS_CLASS_C_DEC& other) |
| { |
| _GLIBCXX_DEBUG_ONLY(assert_valid();) |
| _GLIBCXX_DEBUG_ONLY(other.assert_valid();) |
| |
| const size_type over_top = std::max(m_over_top, other.m_over_top); |
| |
| for (size_type i = 0; i < over_top; ++i) |
| std::swap(m_a_entries[i], other.m_a_entries[i]); |
| |
| std::swap(m_over_top, other.m_over_top); |
| _GLIBCXX_DEBUG_ONLY(assert_valid();) |
| _GLIBCXX_DEBUG_ONLY(other.assert_valid();) |
| } |
| |
| PB_DS_CLASS_T_DEC |
| inline void |
| PB_DS_CLASS_C_DEC:: |
| push(entry p_nd) |
| { |
| _GLIBCXX_DEBUG_ONLY(assert_valid();) |
| _GLIBCXX_DEBUG_ASSERT(m_over_top < max_entries); |
| m_a_entries[m_over_top++] = p_nd; |
| _GLIBCXX_DEBUG_ONLY(assert_valid();) |
| } |
| |
| PB_DS_CLASS_T_DEC |
| inline void |
| PB_DS_CLASS_C_DEC:: |
| pop() |
| { |
| _GLIBCXX_DEBUG_ONLY(assert_valid();) |
| _GLIBCXX_DEBUG_ASSERT(!empty()); |
| --m_over_top; |
| _GLIBCXX_DEBUG_ONLY(assert_valid();) |
| } |
| |
| PB_DS_CLASS_T_DEC |
| inline typename PB_DS_CLASS_C_DEC::node_pointer |
| PB_DS_CLASS_C_DEC:: |
| top() const |
| { |
| _GLIBCXX_DEBUG_ONLY(assert_valid();) |
| _GLIBCXX_DEBUG_ASSERT(!empty()); |
| return *(m_a_entries + m_over_top - 1); |
| } |
| |
| PB_DS_CLASS_T_DEC |
| inline bool |
| PB_DS_CLASS_C_DEC:: |
| empty() const |
| { |
| _GLIBCXX_DEBUG_ONLY(assert_valid();) |
| return m_over_top == 0; |
| } |
| |
| PB_DS_CLASS_T_DEC |
| inline typename PB_DS_CLASS_C_DEC::size_type |
| PB_DS_CLASS_C_DEC:: |
| size() const |
| { return m_over_top; } |
| |
| PB_DS_CLASS_T_DEC |
| void |
| PB_DS_CLASS_C_DEC:: |
| clear() |
| { |
| _GLIBCXX_DEBUG_ONLY(assert_valid();) |
| m_over_top = 0; |
| _GLIBCXX_DEBUG_ONLY(assert_valid();) |
| } |
| |
| PB_DS_CLASS_T_DEC |
| const typename PB_DS_CLASS_C_DEC::const_iterator |
| PB_DS_CLASS_C_DEC:: |
| begin() const |
| { return& m_a_entries[0]; } |
| |
| PB_DS_CLASS_T_DEC |
| const typename PB_DS_CLASS_C_DEC::const_iterator |
| PB_DS_CLASS_C_DEC:: |
| end() const |
| { return& m_a_entries[m_over_top]; } |
| |
| #ifdef _GLIBCXX_DEBUG |
| PB_DS_CLASS_T_DEC |
| void |
| PB_DS_CLASS_C_DEC:: |
| assert_valid() const |
| { _GLIBCXX_DEBUG_ASSERT(m_over_top < max_entries); } |
| #endif |
| |
| #ifdef PB_DS_RC_BINOMIAL_HEAP_TRACE_ |
| PB_DS_CLASS_T_DEC |
| void |
| PB_DS_CLASS_C_DEC:: |
| trace() const |
| { |
| std::cout << "rc" << std::endl; |
| for (size_type i = 0; i < m_over_top; ++i) |
| std::cerr << m_a_entries[i] << std::endl; |
| std::cout << std::endl; |
| } |
| #endif |
| |
| #undef PB_DS_CLASS_T_DEC |
| #undef PB_DS_CLASS_C_DEC |
| |
| } // namespace detail |
| } // namespace __gnu_pbds |
| |
| #endif |
