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[/] [openrisc/] [tags/] [gnu-src/] [gcc-4.5.1/] [gcc-4.5.1-or32-1.0rc3/] [libstdc++-v3/] [include/] [ext/] [pb_ds/] [detail/] [eq_fn/] [hash_eq_fn.hpp] - Rev 516
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// -*- 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 hash_eq_fn.hpp * Contains 2 eqivalence functions, one employing a hash value, * and one ignoring it. */ #ifndef PB_DS_HASH_EQ_FN_HPP #define PB_DS_HASH_EQ_FN_HPP #include <utility> #include <debug/debug.h> namespace __gnu_pbds { namespace detail { template<typename Key, class Eq_Fn, class Allocator, bool Store_Hash> struct hash_eq_fn; #define PB_DS_CLASS_T_DEC \ template<typename Key, class Eq_Fn, class Allocator> #define PB_DS_CLASS_C_DEC \ hash_eq_fn<Key, Eq_Fn, Allocator, false> /** * Specialization 1- The client requests that hash values not be stored. **/ template<typename Key, class Eq_Fn, class Allocator> struct hash_eq_fn<Key, Eq_Fn, Allocator, false> : public Eq_Fn { typedef Eq_Fn eq_fn_base; typedef typename Allocator::template rebind<Key>::other key_allocator; typedef typename key_allocator::const_reference const_key_reference; hash_eq_fn(); hash_eq_fn(const Eq_Fn& r_eq_fn); inline bool operator()(const_key_reference r_lhs_key, const_key_reference r_rhs_key) const; inline void swap(const PB_DS_CLASS_C_DEC& other); }; PB_DS_CLASS_T_DEC PB_DS_CLASS_C_DEC:: hash_eq_fn() { } PB_DS_CLASS_T_DEC inline void PB_DS_CLASS_C_DEC:: swap(const PB_DS_CLASS_C_DEC& other) { std::swap((Eq_Fn& )(*this), (Eq_Fn& )other); } PB_DS_CLASS_T_DEC PB_DS_CLASS_C_DEC:: hash_eq_fn(const Eq_Fn& r_eq_fn) : Eq_Fn(r_eq_fn) { } PB_DS_CLASS_T_DEC inline bool PB_DS_CLASS_C_DEC:: operator()(const_key_reference r_lhs_key, const_key_reference r_rhs_key) const { return (eq_fn_base::operator()(r_lhs_key, r_rhs_key)); } #undef PB_DS_CLASS_T_DEC #undef PB_DS_CLASS_C_DEC #define PB_DS_CLASS_T_DEC \ template<typename Key, class Eq_Fn, class Allocator> #define PB_DS_CLASS_C_DEC \ hash_eq_fn<Key, Eq_Fn, Allocator, true> /** * Specialization 2- The client requests that hash values be stored. **/ template<typename Key, class Eq_Fn, class Allocator> struct hash_eq_fn<Key, Eq_Fn, Allocator, true> : public Eq_Fn { typedef typename Allocator::size_type size_type; typedef Eq_Fn eq_fn_base; typedef typename Allocator::template rebind<Key>::other key_allocator; typedef typename key_allocator::const_reference const_key_reference; hash_eq_fn(); hash_eq_fn(const Eq_Fn& r_eq_fn); inline bool operator()(const_key_reference r_lhs_key, size_type lhs_hash, const_key_reference r_rhs_key, size_type rhs_hash) const; inline void swap(const PB_DS_CLASS_C_DEC& other); }; PB_DS_CLASS_T_DEC PB_DS_CLASS_C_DEC:: hash_eq_fn() { } PB_DS_CLASS_T_DEC PB_DS_CLASS_C_DEC:: hash_eq_fn(const Eq_Fn& r_eq_fn) : Eq_Fn(r_eq_fn) { } PB_DS_CLASS_T_DEC inline bool PB_DS_CLASS_C_DEC:: operator()(const_key_reference r_lhs_key, size_type lhs_hash, const_key_reference r_rhs_key, size_type rhs_hash) const { _GLIBCXX_DEBUG_ASSERT(!eq_fn_base::operator()(r_lhs_key, r_rhs_key) || lhs_hash == rhs_hash); return (lhs_hash == rhs_hash && eq_fn_base::operator()(r_lhs_key, r_rhs_key)); } PB_DS_CLASS_T_DEC inline void PB_DS_CLASS_C_DEC:: swap(const PB_DS_CLASS_C_DEC& other) { std::swap((Eq_Fn& )(*this), (Eq_Fn& )(other)); } #undef PB_DS_CLASS_T_DEC #undef PB_DS_CLASS_C_DEC } // namespace detail } // namespace __gnu_pbds #endif