| // -*- C++ -*- |
| |
| // Copyright (C) 2005-2014 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 ranged_hash_fn.hpp |
| * Contains a unified ranged hash functor, allowing the hash tables |
| * to deal with a single class for ranged hashing. |
| */ |
| |
| #ifndef PB_DS_RANGED_HASH_FN_HPP |
| #define PB_DS_RANGED_HASH_FN_HPP |
| |
| #include <utility> |
| #include <debug/debug.h> |
| |
| namespace __gnu_pbds |
| { |
| namespace detail |
| { |
| /// Primary template. |
| template<typename Key, typename Hash_Fn, typename _Alloc, |
| typename Comb_Hash_Fn, bool Store_Hash> |
| class ranged_hash_fn; |
| |
| #define PB_DS_CLASS_T_DEC \ |
| template<typename Key, typename Hash_Fn, typename _Alloc, \ |
| typename Comb_Hash_Fn> |
| |
| #define PB_DS_CLASS_C_DEC \ |
| ranged_hash_fn<Key, Hash_Fn, _Alloc, Comb_Hash_Fn, false> |
| |
| /** |
| * Specialization 1 |
| * The client supplies a hash function and a ranged hash function, |
| * and requests that hash values not be stored. |
| **/ |
| template<typename Key, typename Hash_Fn, typename _Alloc, |
| typename Comb_Hash_Fn> |
| class ranged_hash_fn< Key, Hash_Fn, _Alloc, Comb_Hash_Fn, false> |
| : public Hash_Fn, public Comb_Hash_Fn |
| { |
| protected: |
| typedef typename _Alloc::size_type size_type; |
| typedef Hash_Fn hash_fn_base; |
| typedef Comb_Hash_Fn comb_hash_fn_base; |
| typedef typename _Alloc::template rebind< Key>::other key_allocator; |
| typedef typename key_allocator::const_reference key_const_reference; |
| |
| ranged_hash_fn(size_type); |
| |
| ranged_hash_fn(size_type, const Hash_Fn&); |
| |
| ranged_hash_fn(size_type, const Hash_Fn&, const Comb_Hash_Fn&); |
| |
| void |
| swap(PB_DS_CLASS_C_DEC&); |
| |
| void |
| notify_resized(size_type); |
| |
| inline size_type |
| operator()(key_const_reference) const; |
| }; |
| |
| PB_DS_CLASS_T_DEC |
| PB_DS_CLASS_C_DEC:: |
| ranged_hash_fn(size_type size) |
| { Comb_Hash_Fn::notify_resized(size); } |
| |
| PB_DS_CLASS_T_DEC |
| PB_DS_CLASS_C_DEC:: |
| ranged_hash_fn(size_type size, const Hash_Fn& r_hash_fn) |
| : Hash_Fn(r_hash_fn) |
| { Comb_Hash_Fn::notify_resized(size); } |
| |
| PB_DS_CLASS_T_DEC |
| PB_DS_CLASS_C_DEC:: |
| ranged_hash_fn(size_type size, const Hash_Fn& r_hash_fn, |
| const Comb_Hash_Fn& r_comb_hash_fn) |
| : Hash_Fn(r_hash_fn), Comb_Hash_Fn(r_comb_hash_fn) |
| { comb_hash_fn_base::notify_resized(size); } |
| |
| PB_DS_CLASS_T_DEC |
| void |
| PB_DS_CLASS_C_DEC:: |
| swap(PB_DS_CLASS_C_DEC& other) |
| { |
| comb_hash_fn_base::swap(other); |
| std::swap((Hash_Fn& )(*this), (Hash_Fn& )other); |
| } |
| |
| PB_DS_CLASS_T_DEC |
| void |
| PB_DS_CLASS_C_DEC:: |
| notify_resized(size_type size) |
| { comb_hash_fn_base::notify_resized(size); } |
| |
| PB_DS_CLASS_T_DEC |
| inline typename PB_DS_CLASS_C_DEC::size_type |
| PB_DS_CLASS_C_DEC:: |
| operator()(key_const_reference r_key) const |
| { return (comb_hash_fn_base::operator()(hash_fn_base::operator()(r_key)));} |
| |
| #undef PB_DS_CLASS_T_DEC |
| #undef PB_DS_CLASS_C_DEC |
| |
| #define PB_DS_CLASS_T_DEC \ |
| template<typename Key, typename Hash_Fn, typename _Alloc, \ |
| typename Comb_Hash_Fn> |
| |
| #define PB_DS_CLASS_C_DEC \ |
| ranged_hash_fn<Key,Hash_Fn, _Alloc, Comb_Hash_Fn, true> |
| |
| /** |
| * Specialization 2 |
| * The client supplies a hash function and a ranged hash function, |
| * and requests that hash values be stored. |
| **/ |
| template<typename Key, typename Hash_Fn, typename _Alloc, |
| typename Comb_Hash_Fn> |
| class ranged_hash_fn<Key, Hash_Fn, _Alloc, Comb_Hash_Fn, true> |
| : public Hash_Fn, public Comb_Hash_Fn |
| { |
| protected: |
| typedef typename _Alloc::size_type size_type; |
| typedef std::pair<size_type, size_type> comp_hash; |
| typedef Hash_Fn hash_fn_base; |
| typedef Comb_Hash_Fn comb_hash_fn_base; |
| typedef typename _Alloc::template rebind<Key>::other key_allocator; |
| typedef typename key_allocator::const_reference key_const_reference; |
| |
| ranged_hash_fn(size_type); |
| |
| ranged_hash_fn(size_type, const Hash_Fn&); |
| |
| ranged_hash_fn(size_type, const Hash_Fn&, const Comb_Hash_Fn&); |
| |
| void |
| swap(PB_DS_CLASS_C_DEC&); |
| |
| void |
| notify_resized(size_type); |
| |
| inline comp_hash |
| operator()(key_const_reference) const; |
| |
| inline comp_hash |
| operator()(key_const_reference, size_type) const; |
| }; |
| |
| PB_DS_CLASS_T_DEC |
| PB_DS_CLASS_C_DEC:: |
| ranged_hash_fn(size_type size) |
| { Comb_Hash_Fn::notify_resized(size); } |
| |
| PB_DS_CLASS_T_DEC |
| PB_DS_CLASS_C_DEC:: |
| ranged_hash_fn(size_type size, const Hash_Fn& r_hash_fn) : |
| Hash_Fn(r_hash_fn) |
| { Comb_Hash_Fn::notify_resized(size); } |
| |
| PB_DS_CLASS_T_DEC |
| PB_DS_CLASS_C_DEC:: |
| ranged_hash_fn(size_type size, const Hash_Fn& r_hash_fn, |
| const Comb_Hash_Fn& r_comb_hash_fn) |
| : Hash_Fn(r_hash_fn), Comb_Hash_Fn(r_comb_hash_fn) |
| { comb_hash_fn_base::notify_resized(size); } |
| |
| PB_DS_CLASS_T_DEC |
| void |
| PB_DS_CLASS_C_DEC:: |
| swap(PB_DS_CLASS_C_DEC& other) |
| { |
| comb_hash_fn_base::swap(other); |
| std::swap((Hash_Fn& )(*this), (Hash_Fn& )other); |
| } |
| |
| PB_DS_CLASS_T_DEC |
| void |
| PB_DS_CLASS_C_DEC:: |
| notify_resized(size_type size) |
| { comb_hash_fn_base::notify_resized(size); } |
| |
| PB_DS_CLASS_T_DEC |
| inline typename PB_DS_CLASS_C_DEC::comp_hash |
| PB_DS_CLASS_C_DEC:: |
| operator()(key_const_reference r_key) const |
| { |
| const size_type hash = hash_fn_base::operator()(r_key); |
| return std::make_pair(comb_hash_fn_base::operator()(hash), hash); |
| } |
| |
| PB_DS_CLASS_T_DEC |
| inline typename PB_DS_CLASS_C_DEC::comp_hash |
| PB_DS_CLASS_C_DEC:: |
| operator() |
| #ifdef _GLIBCXX_DEBUG |
| (key_const_reference r_key, size_type hash) const |
| #else |
| (key_const_reference /*r_key*/, size_type hash) const |
| #endif |
| { |
| _GLIBCXX_DEBUG_ASSERT(hash == hash_fn_base::operator()(r_key)); |
| return std::make_pair(comb_hash_fn_base::operator()(hash), hash); |
| } |
| |
| #undef PB_DS_CLASS_T_DEC |
| #undef PB_DS_CLASS_C_DEC |
| |
| #define PB_DS_CLASS_T_DEC \ |
| template<typename Key, typename _Alloc, typename Comb_Hash_Fn> |
| |
| #define PB_DS_CLASS_C_DEC \ |
| ranged_hash_fn<Key, null_type, _Alloc, Comb_Hash_Fn, false> |
| |
| /** |
| * Specialization 3 |
| * The client does not supply a hash function (by specifying |
| * null_type as the Hash_Fn parameter), and requests that hash |
| * values not be stored. |
| **/ |
| template<typename Key, typename _Alloc, typename Comb_Hash_Fn> |
| class ranged_hash_fn<Key, null_type, _Alloc, Comb_Hash_Fn, false> |
| : public Comb_Hash_Fn |
| { |
| protected: |
| typedef typename _Alloc::size_type size_type; |
| typedef Comb_Hash_Fn comb_hash_fn_base; |
| |
| ranged_hash_fn(size_type); |
| |
| ranged_hash_fn(size_type, const Comb_Hash_Fn&); |
| |
| ranged_hash_fn(size_type, const null_type&, const Comb_Hash_Fn&); |
| |
| void |
| swap(PB_DS_CLASS_C_DEC&); |
| }; |
| |
| PB_DS_CLASS_T_DEC |
| PB_DS_CLASS_C_DEC:: |
| ranged_hash_fn(size_type size) |
| { Comb_Hash_Fn::notify_resized(size); } |
| |
| PB_DS_CLASS_T_DEC |
| PB_DS_CLASS_C_DEC:: |
| ranged_hash_fn(size_type size, const Comb_Hash_Fn& r_comb_hash_fn) : |
| Comb_Hash_Fn(r_comb_hash_fn) |
| { } |
| |
| PB_DS_CLASS_T_DEC |
| PB_DS_CLASS_C_DEC:: |
| ranged_hash_fn(size_type size, const null_type& r_null_type, |
| const Comb_Hash_Fn& r_comb_hash_fn) |
| : Comb_Hash_Fn(r_comb_hash_fn) |
| { } |
| |
| PB_DS_CLASS_T_DEC |
| void |
| PB_DS_CLASS_C_DEC:: |
| swap(PB_DS_CLASS_C_DEC& other) |
| { comb_hash_fn_base::swap(other); } |
| |
| #undef PB_DS_CLASS_T_DEC |
| #undef PB_DS_CLASS_C_DEC |
| |
| #define PB_DS_CLASS_T_DEC \ |
| template<typename Key, typename _Alloc, typename Comb_Hash_Fn> |
| |
| #define PB_DS_CLASS_C_DEC \ |
| ranged_hash_fn<Key, null_type, _Alloc, Comb_Hash_Fn, true> |
| |
| /** |
| * Specialization 4 |
| * The client does not supply a hash function (by specifying |
| * null_type as the Hash_Fn parameter), and requests that hash |
| * values be stored. |
| **/ |
| template<typename Key, typename _Alloc, typename Comb_Hash_Fn> |
| class ranged_hash_fn<Key, null_type, _Alloc, Comb_Hash_Fn, true> |
| : public Comb_Hash_Fn |
| { |
| protected: |
| typedef typename _Alloc::size_type size_type; |
| typedef Comb_Hash_Fn comb_hash_fn_base; |
| |
| ranged_hash_fn(size_type); |
| |
| ranged_hash_fn(size_type, const Comb_Hash_Fn&); |
| |
| ranged_hash_fn(size_type, const null_type&, const Comb_Hash_Fn&); |
| |
| void |
| swap(PB_DS_CLASS_C_DEC&); |
| }; |
| |
| PB_DS_CLASS_T_DEC |
| PB_DS_CLASS_C_DEC:: |
| ranged_hash_fn(size_type size) |
| { Comb_Hash_Fn::notify_resized(size); } |
| |
| PB_DS_CLASS_T_DEC |
| PB_DS_CLASS_C_DEC:: |
| ranged_hash_fn(size_type size, const Comb_Hash_Fn& r_comb_hash_fn) |
| : Comb_Hash_Fn(r_comb_hash_fn) |
| { } |
| |
| PB_DS_CLASS_T_DEC |
| PB_DS_CLASS_C_DEC:: |
| ranged_hash_fn(size_type size, const null_type& r_null_type, |
| const Comb_Hash_Fn& r_comb_hash_fn) |
| : Comb_Hash_Fn(r_comb_hash_fn) |
| { } |
| |
| PB_DS_CLASS_T_DEC |
| void |
| PB_DS_CLASS_C_DEC:: |
| swap(PB_DS_CLASS_C_DEC& other) |
| { comb_hash_fn_base::swap(other); } |
| |
| #undef PB_DS_CLASS_T_DEC |
| #undef PB_DS_CLASS_C_DEC |
| |
| } // namespace detail |
| } // namespace __gnu_pbds |
| |
| #endif |
