| // -*- C++ -*- |
| |
| // Copyright (C) 2005-2015 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 hash_exponential_size_policy_imp.hpp |
| * Contains a resize size policy implementation. |
| */ |
| |
| PB_DS_CLASS_T_DEC |
| PB_DS_CLASS_C_DEC:: |
| hash_exponential_size_policy(size_type start_size, size_type grow_factor) : |
| m_start_size(start_size), |
| m_grow_factor(grow_factor) |
| { } |
| |
| PB_DS_CLASS_T_DEC |
| void |
| PB_DS_CLASS_C_DEC:: |
| swap(PB_DS_CLASS_C_DEC& other) |
| { |
| std::swap(m_start_size, other.m_start_size); |
| std::swap(m_grow_factor, other.m_grow_factor); |
| } |
| |
| PB_DS_CLASS_T_DEC |
| typename PB_DS_CLASS_C_DEC::size_type |
| PB_DS_CLASS_C_DEC:: |
| get_nearest_larger_size(size_type size) const |
| { |
| size_type ret = m_start_size; |
| while (ret <= size) |
| { |
| const size_type next_ret = ret* m_grow_factor; |
| if (next_ret < ret) |
| __throw_insert_error(); |
| ret = next_ret; |
| } |
| return ret; |
| } |
| |
| PB_DS_CLASS_T_DEC |
| typename PB_DS_CLASS_C_DEC::size_type |
| PB_DS_CLASS_C_DEC:: |
| get_nearest_smaller_size(size_type size) const |
| { |
| size_type ret = m_start_size; |
| while (true) |
| { |
| const size_type next_ret = ret* m_grow_factor; |
| if (next_ret < ret) |
| __throw_resize_error(); |
| if (next_ret >= size) |
| return (ret); |
| ret = next_ret; |
| } |
| return ret; |
| } |
| |