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Diffstat (limited to 'gcc-4.4.3/libstdc++-v3/include/ext/pb_ds/hash_policy.hpp')
| -rw-r--r-- | gcc-4.4.3/libstdc++-v3/include/ext/pb_ds/hash_policy.hpp | 604 |
1 files changed, 0 insertions, 604 deletions
diff --git a/gcc-4.4.3/libstdc++-v3/include/ext/pb_ds/hash_policy.hpp b/gcc-4.4.3/libstdc++-v3/include/ext/pb_ds/hash_policy.hpp deleted file mode 100644 index 24c0c4562..000000000 --- a/gcc-4.4.3/libstdc++-v3/include/ext/pb_ds/hash_policy.hpp +++ /dev/null @@ -1,604 +0,0 @@ -// -*- 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_policy.hpp - * Contains hash-related policies. - */ - -#ifndef PB_DS_HASH_POLICY_HPP -#define PB_DS_HASH_POLICY_HPP - -#include <algorithm> -#include <vector> -#include <cmath> -#include <ext/pb_ds/exception.hpp> -#include <ext/pb_ds/detail/type_utils.hpp> -#include <ext/pb_ds/detail/hash_fn/mask_based_range_hashing.hpp> -#include <ext/pb_ds/detail/hash_fn/mod_based_range_hashing.hpp> -#include <ext/pb_ds/detail/resize_policy/hash_load_check_resize_trigger_size_base.hpp> - -namespace __gnu_pbds -{ - // A null hash function, indicating that the combining hash function - // is actually a ranged hash function. - struct null_hash_fn - { }; - - // A null probe function, indicating that the combining probe - // function is actually a ranged probe function. - struct null_probe_fn - { }; - -#define PB_DS_CLASS_T_DEC template<typename Size_Type> -#define PB_DS_CLASS_C_DEC linear_probe_fn<Size_Type> - - // A probe sequence policy using fixed increments. - template<typename Size_Type = size_t> - class linear_probe_fn - { - public: - typedef Size_Type size_type; - - void - swap(PB_DS_CLASS_C_DEC& other); - - protected: - // Returns the i-th offset from the hash value. - inline size_type - operator()(size_type i) const; - }; - -#include <ext/pb_ds/detail/hash_fn/linear_probe_fn_imp.hpp> - -#undef PB_DS_CLASS_T_DEC -#undef PB_DS_CLASS_C_DEC - -#define PB_DS_CLASS_T_DEC template<typename Size_Type> -#define PB_DS_CLASS_C_DEC quadratic_probe_fn<Size_Type> - - // A probe sequence policy using square increments. - template<typename Size_Type = size_t> - class quadratic_probe_fn - { - public: - typedef Size_Type size_type; - - void - swap(PB_DS_CLASS_C_DEC& other); - - protected: - // Returns the i-th offset from the hash value. - inline size_type - operator()(size_type i) const; - }; - -#include <ext/pb_ds/detail/hash_fn/quadratic_probe_fn_imp.hpp> - -#undef PB_DS_CLASS_T_DEC -#undef PB_DS_CLASS_C_DEC - -#define PB_DS_CLASS_T_DEC template<typename Size_Type> -#define PB_DS_CLASS_C_DEC direct_mask_range_hashing<Size_Type> - - // A mask range-hashing class (uses a bit-mask). - template<typename Size_Type = size_t> - class direct_mask_range_hashing - : public detail::mask_based_range_hashing<Size_Type> - { - private: - typedef detail::mask_based_range_hashing<Size_Type> mask_based_base; - - public: - typedef Size_Type size_type; - - void - swap(PB_DS_CLASS_C_DEC& other); - - protected: - void - notify_resized(size_type size); - - // Transforms the __hash value hash into a ranged-hash value - // (using a bit-mask). - inline size_type - operator()(size_type hash) const; - }; - -#include <ext/pb_ds/detail/hash_fn/direct_mask_range_hashing_imp.hpp> - -#undef PB_DS_CLASS_T_DEC -#undef PB_DS_CLASS_C_DEC - -#define PB_DS_CLASS_T_DEC template<typename Size_Type> -#define PB_DS_CLASS_C_DEC direct_mod_range_hashing<Size_Type> - - // A mod range-hashing class (uses the modulo function). - template<typename Size_Type = size_t> - class direct_mod_range_hashing - : public detail::mod_based_range_hashing<Size_Type> - { - public: - typedef Size_Type size_type; - - void - swap(PB_DS_CLASS_C_DEC& other); - - protected: - void - notify_resized(size_type size); - - // Transforms the __hash value hash into a ranged-hash value - // (using a modulo operation). - inline size_type - operator()(size_type hash) const; - - private: - typedef detail::mod_based_range_hashing<size_type> mod_based_base; - }; - -#include <ext/pb_ds/detail/hash_fn/direct_mod_range_hashing_imp.hpp> - -#undef PB_DS_CLASS_T_DEC -#undef PB_DS_CLASS_C_DEC - -#define PB_DS_CLASS_T_DEC template<bool External_Load_Access, typename Size_Type> -#define PB_DS_CLASS_C_DEC hash_load_check_resize_trigger<External_Load_Access, Size_Type> -#define PB_DS_SIZE_BASE_C_DEC detail::hash_load_check_resize_trigger_size_base<Size_Type, External_Load_Access> - - // A resize trigger policy based on a load check. It keeps the - // load factor between some load factors load_min and load_max. - template<bool External_Load_Access = false, typename Size_Type = size_t> - class hash_load_check_resize_trigger : private PB_DS_SIZE_BASE_C_DEC - { - public: - typedef Size_Type size_type; - - enum - { - external_load_access = External_Load_Access - }; - - // Default constructor, or constructor taking load_min and - // load_max load factors between which this policy will keep the - // actual load. - hash_load_check_resize_trigger(float load_min = 0.125, - float load_max = 0.5); - - void - swap(hash_load_check_resize_trigger& other); - - virtual - ~hash_load_check_resize_trigger(); - - // Returns a pair of the minimal and maximal loads, respectively. - inline std::pair<float, float> - get_loads() const; - - // Sets the loads through a pair of the minimal and maximal - // loads, respectively. - void - set_loads(std::pair<float, float> load_pair); - - protected: - inline void - notify_insert_search_start(); - - inline void - notify_insert_search_collision(); - - inline void - notify_insert_search_end(); - - inline void - notify_find_search_start(); - - inline void - notify_find_search_collision(); - - inline void - notify_find_search_end(); - - inline void - notify_erase_search_start(); - - inline void - notify_erase_search_collision(); - - inline void - notify_erase_search_end(); - - // Notifies an element was inserted. The total number of entries - // in the table is num_entries. - inline void - notify_inserted(size_type num_entries); - - inline void - notify_erased(size_type num_entries); - - // Notifies the table was cleared. - void - notify_cleared(); - - // Notifies the table was resized as a result of this object's - // signifying that a resize is needed. - void - notify_resized(size_type new_size); - - void - notify_externally_resized(size_type new_size); - - inline bool - is_resize_needed() const; - - inline bool - is_grow_needed(size_type size, size_type num_entries) const; - - private: - virtual void - do_resize(size_type new_size); - - typedef PB_DS_SIZE_BASE_C_DEC size_base; - -#ifdef _GLIBCXX_DEBUG - void - assert_valid() const; -#endif - - float m_load_min; - float m_load_max; - size_type m_next_shrink_size; - size_type m_next_grow_size; - bool m_resize_needed; - }; - -#include <ext/pb_ds/detail/resize_policy/hash_load_check_resize_trigger_imp.hpp> - -#undef PB_DS_CLASS_T_DEC -#undef PB_DS_CLASS_C_DEC -#undef PB_DS_SIZE_BASE_C_DEC - -#define PB_DS_CLASS_T_DEC template<bool External_Load_Access, typename Size_Type> -#define PB_DS_CLASS_C_DEC cc_hash_max_collision_check_resize_trigger<External_Load_Access, Size_Type> - - // A resize trigger policy based on collision checks. It keeps the - // simulated load factor lower than some given load factor. - template<bool External_Load_Access = false, typename Size_Type = size_t> - class cc_hash_max_collision_check_resize_trigger - { - public: - typedef Size_Type size_type; - - enum - { - external_load_access = External_Load_Access - }; - - // Default constructor, or constructor taking load, a __load - // factor which it will attempt to maintain. - cc_hash_max_collision_check_resize_trigger(float load = 0.5); - - void - swap(PB_DS_CLASS_C_DEC& other); - - // Returns the current load. - inline float - get_load() const; - - // Sets the load; does not resize the container. - void - set_load(float load); - - protected: - inline void - notify_insert_search_start(); - - inline void - notify_insert_search_collision(); - - inline void - notify_insert_search_end(); - - inline void - notify_find_search_start(); - - inline void - notify_find_search_collision(); - - inline void - notify_find_search_end(); - - inline void - notify_erase_search_start(); - - inline void - notify_erase_search_collision(); - - inline void - notify_erase_search_end(); - - inline void - notify_inserted(size_type num_entries); - - inline void - notify_erased(size_type num_entries); - - void - notify_cleared(); - - // Notifies the table was resized as a result of this object's - // signifying that a resize is needed. - void - notify_resized(size_type new_size); - - void - notify_externally_resized(size_type new_size); - - inline bool - is_resize_needed() const; - - inline bool - is_grow_needed(size_type size, size_type num_entries) const; - - private: - void - calc_max_num_coll(); - - inline void - calc_resize_needed(); - - float m_load; - size_type m_size; - size_type m_num_col; - size_type m_max_col; - bool m_resize_needed; - }; - -#include <ext/pb_ds/detail/resize_policy/cc_hash_max_collision_check_resize_trigger_imp.hpp> - -#undef PB_DS_CLASS_T_DEC -#undef PB_DS_CLASS_C_DEC - -#define PB_DS_CLASS_T_DEC template<typename Size_Type> -#define PB_DS_CLASS_C_DEC hash_exponential_size_policy<Size_Type> - - // A size policy whose sequence of sizes form an exponential - // sequence (typically powers of 2. - template<typename Size_Type = size_t> - class hash_exponential_size_policy - { - public: - typedef Size_Type size_type; - - // Default constructor, or onstructor taking a start_size, or - // constructor taking a start size and grow_factor. The policy - // will use the sequence of sizes start_size, start_size* - // grow_factor, start_size* grow_factor^2, ... - hash_exponential_size_policy(size_type start_size = 8, - size_type grow_factor = 2); - - void - swap(PB_DS_CLASS_C_DEC& other); - - protected: - size_type - get_nearest_larger_size(size_type size) const; - - size_type - get_nearest_smaller_size(size_type size) const; - - private: - size_type m_start_size; - size_type m_grow_factor; - }; - -#include <ext/pb_ds/detail/resize_policy/hash_exponential_size_policy_imp.hpp> - -#undef PB_DS_CLASS_T_DEC -#undef PB_DS_CLASS_C_DEC - -#define PB_DS_CLASS_T_DEC -#define PB_DS_CLASS_C_DEC hash_prime_size_policy - - // A size policy whose sequence of sizes form a nearly-exponential - // sequence of primes. - class hash_prime_size_policy - { - public: - // Size type. - typedef size_t size_type; - - // Default constructor, or onstructor taking a start_size The - // policy will use the sequence of sizes approximately - // start_size, start_size* 2, start_size* 2^2, ... - hash_prime_size_policy(size_type start_size = 8); - - inline void - swap(PB_DS_CLASS_C_DEC& other); - - protected: - size_type - get_nearest_larger_size(size_type size) const; - - size_type - get_nearest_smaller_size(size_type size) const; - - private: - size_type m_start_size; - }; - -#include <ext/pb_ds/detail/resize_policy/hash_prime_size_policy_imp.hpp> - -#undef PB_DS_CLASS_T_DEC -#undef PB_DS_CLASS_C_DEC - -#define PB_DS_CLASS_T_DEC template<typename Size_Policy, typename Trigger_Policy, bool External_Size_Access, typename Size_Type> - -#define PB_DS_CLASS_C_DEC hash_standard_resize_policy<Size_Policy, Trigger_Policy, External_Size_Access, Size_Type> - - // A resize policy which delegates operations to size and trigger policies. - template<typename Size_Policy = hash_exponential_size_policy<>, - typename Trigger_Policy = hash_load_check_resize_trigger<>, - bool External_Size_Access = false, - typename Size_Type = size_t> - class hash_standard_resize_policy - : public Size_Policy, public Trigger_Policy - { - public: - typedef Size_Type size_type; - typedef Trigger_Policy trigger_policy; - typedef Size_Policy size_policy; - - enum - { - external_size_access = External_Size_Access - }; - - // Default constructor. - hash_standard_resize_policy(); - - // constructor taking some policies r_size_policy will be copied - // by the Size_Policy object of this object. - hash_standard_resize_policy(const Size_Policy& r_size_policy); - - // constructor taking some policies. r_size_policy will be - // copied by the Size_Policy object of this - // object. r_trigger_policy will be copied by the Trigger_Policy - // object of this object. - hash_standard_resize_policy(const Size_Policy& r_size_policy, - const Trigger_Policy& r_trigger_policy); - - virtual - ~hash_standard_resize_policy(); - - inline void - swap(PB_DS_CLASS_C_DEC& other); - - // Access to the Size_Policy object used. - Size_Policy& - get_size_policy(); - - // Const access to the Size_Policy object used. - const Size_Policy& - get_size_policy() const; - - // Access to the Trigger_Policy object used. - Trigger_Policy& - get_trigger_policy(); - - // Access to the Trigger_Policy object used. - const Trigger_Policy& - get_trigger_policy() const; - - // Returns the actual size of the container. - inline size_type - get_actual_size() const; - - // Resizes the container to suggested_new_size, a suggested size - // (the actual size will be determined by the Size_Policy - // object). - void - resize(size_type suggested_new_size); - - protected: - inline void - notify_insert_search_start(); - - inline void - notify_insert_search_collision(); - - inline void - notify_insert_search_end(); - - inline void - notify_find_search_start(); - - inline void - notify_find_search_collision(); - - inline void - notify_find_search_end(); - - inline void - notify_erase_search_start(); - - inline void - notify_erase_search_collision(); - - inline void - notify_erase_search_end(); - - inline void - notify_inserted(size_type num_e); - - inline void - notify_erased(size_type num_e); - - void - notify_cleared(); - - void - notify_resized(size_type new_size); - - inline bool - is_resize_needed() const; - - // Queries what the new size should be, when the container is - // resized naturally. The current __size of the container is - // size, and the number of used entries within the container is - // num_used_e. - size_type - get_new_size(size_type size, size_type num_used_e) const; - - private: - // Resizes to new_size. - virtual void - do_resize(size_type new_size); - - typedef Trigger_Policy trigger_policy_base; - - typedef Size_Policy size_policy_base; - - size_type m_size; - }; - -#include <ext/pb_ds/detail/resize_policy/hash_standard_resize_policy_imp.hpp> - -#undef PB_DS_CLASS_T_DEC -#undef PB_DS_CLASS_C_DEC - -} // namespace __gnu_pbds - -#endif |