[thirdparty/gcc.git] / libstdc++-v3 / include / ext / pb_assoc / detail / eq_fn / hash_eq_fn.hpp

// -*- C++ -*-

// Copyright (C) 2005 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 2, 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.

// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING.  If not, write to the Free
// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
// USA.

// As a special exception, you may use this file as part of a free software
// library without restriction.  Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the GNU General Public License.  This exception does not however
// invalidate any other reasons why the executable file might be covered by
// the GNU General Public License.

// 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 HASH_EQ_FN_HPP
#define HASH_EQ_FN_HPP

#include <utility>

namespace pb_assoc
{

  namespace detail
  {

#ifdef PB_ASSOC_HASH_EQ_FN_DEBUG
#define PB_ASSOC_DBG_ASSERT(X) assert(X)
#define PB_ASSOC_DBG_VERIFY(X) assert(X)
#define PB_ASSOC_DBG_ONLY(X) X
#else // #ifdef PB_ASSOC_HASH_EQ_FN_DEBUG
#define PB_ASSOC_DBG_ASSERT(X)
#define PB_ASSOC_DBG_VERIFY(X) {if((X)==0);}
#define PB_ASSOC_DBG_ONLY(X) ;
#endif // #ifdef PB_ASSOC_HASH_EQ_FN_DEBUG

    template<typename Key, class Eq_Fn, class Allocator, bool Store_Hash>
    struct hash_eq_fn;

#define PB_ASSOC_CLASS_T_DEC \
	template<typename Key, class Eq_Fn, class Allocator>

#define PB_ASSOC_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 my_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_ASSOC_CLASS_C_DEC& r_other);
    };

    PB_ASSOC_CLASS_T_DEC
    PB_ASSOC_CLASS_C_DEC::
    hash_eq_fn()
    { }

    PB_ASSOC_CLASS_T_DEC
    inline void
    PB_ASSOC_CLASS_C_DEC::
    swap(const PB_ASSOC_CLASS_C_DEC& r_other)
    {
      std::swap((Eq_Fn& )(*this), (Eq_Fn& )r_other);
    }

    PB_ASSOC_CLASS_T_DEC
    PB_ASSOC_CLASS_C_DEC::
    hash_eq_fn(const Eq_Fn& r_eq_fn) :
      Eq_Fn(r_eq_fn)
    { }

    PB_ASSOC_CLASS_T_DEC
    inline bool
    PB_ASSOC_CLASS_C_DEC::
    operator()(const_key_reference r_lhs_key, const_key_reference r_rhs_key) const
    {
      return (my_eq_fn_base::operator()(r_lhs_key, r_rhs_key));
    }

#undef PB_ASSOC_CLASS_T_DEC
#undef PB_ASSOC_CLASS_C_DEC

#define PB_ASSOC_CLASS_T_DEC \
	template<typename Key, class Eq_Fn, class Allocator>

#define PB_ASSOC_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 my_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_ASSOC_CLASS_C_DEC& r_other);
    };

    PB_ASSOC_CLASS_T_DEC
    PB_ASSOC_CLASS_C_DEC::
    hash_eq_fn()
    { }

    PB_ASSOC_CLASS_T_DEC
    PB_ASSOC_CLASS_C_DEC::
    hash_eq_fn(const Eq_Fn& r_eq_fn) :
      Eq_Fn(r_eq_fn)
    { }

    PB_ASSOC_CLASS_T_DEC
    inline bool
    PB_ASSOC_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
    {
      PB_ASSOC_DBG_ASSERT(!my_eq_fn_base::operator()(r_lhs_key, r_rhs_key) ||
			  lhs_hash == rhs_hash);

      return (lhs_hash == rhs_hash&& 
	      my_eq_fn_base::operator()(r_lhs_key, r_rhs_key));
    }

    PB_ASSOC_CLASS_T_DEC
    inline void
    PB_ASSOC_CLASS_C_DEC::
    swap(const PB_ASSOC_CLASS_C_DEC& r_other)
    {
      std::swap((Eq_Fn& )(*this), (Eq_Fn& )(r_other));
    }

#undef PB_ASSOC_CLASS_T_DEC
#undef PB_ASSOC_CLASS_C_DEC

#undef PB_ASSOC_DBG_ASSERT
#undef PB_ASSOC_DBG_VERIFY
#undef PB_ASSOC_DBG_ONLY

  } // namespace detail

} // namespace pb_assoc

#endif // #ifndef HASH_EQ_FN_HPP
Commit	Line	Data
fd1e1726 BK	1	// -- C++ --
	2
	3	// Copyright (C) 2005 Free Software Foundation, Inc.
	4	//
	5	// This file is part of the GNU ISO C++ Library. This library is free
	6	// software; you can redistribute it and/or modify it under the
	7	// terms of the GNU General Public License as published by the
	8	// Free Software Foundation; either version 2, or (at your option)
	9	// any later version.
	10
	11	// This library is distributed in the hope that it will be useful,
	12	// but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	// GNU General Public License for more details.
	15
	16	// You should have received a copy of the GNU General Public License along
	17	// with this library; see the file COPYING. If not, write to the Free
83f51799	18	// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
fd1e1726 BK	19	// USA.
	20
	21	// As a special exception, you may use this file as part of a free software
	22	// library without restriction. Specifically, if other files instantiate
	23	// templates or use macros or inline functions from this file, or you compile
	24	// this file and link it with other files to produce an executable, this
	25	// file does not by itself cause the resulting executable to be covered by
	26	// the GNU General Public License. This exception does not however
	27	// invalidate any other reasons why the executable file might be covered by
	28	// the GNU General Public License.
	29
	30	// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
	31
	32	// Permission to use, copy, modify, sell, and distribute this software
	33	// is hereby granted without fee, provided that the above copyright
	34	// notice appears in all copies, and that both that copyright notice and
	35	// this permission notice appear in supporting documentation. None of
	36	// the above authors, nor IBM Haifa Research Laboratories, make any
	37	// representation about the suitability of this software for any
	38	// purpose. It is provided "as is" without express or implied warranty.
	39
	40	/**
	41	* @file hash_eq_fn.hpp
	42	* Contains 2 eqivalence functions, one employing a hash value,
	43	* and one ignoring it.
	44	*/
	45
	46	#ifndef HASH_EQ_FN_HPP
	47	#define HASH_EQ_FN_HPP
	48
	49	#include <utility>
	50
	51	namespace pb_assoc
	52	{
	53
	54	namespace detail
	55	{
	56
	57	#ifdef PB_ASSOC_HASH_EQ_FN_DEBUG
	58	#define PB_ASSOC_DBG_ASSERT(X) assert(X)
	59	#define PB_ASSOC_DBG_VERIFY(X) assert(X)
	60	#define PB_ASSOC_DBG_ONLY(X) X
	61	#else // #ifdef PB_ASSOC_HASH_EQ_FN_DEBUG
	62	#define PB_ASSOC_DBG_ASSERT(X)
	63	#define PB_ASSOC_DBG_VERIFY(X) {if((X)==0);}
	64	#define PB_ASSOC_DBG_ONLY(X) ;
	65	#endif // #ifdef PB_ASSOC_HASH_EQ_FN_DEBUG
	66
	67	template<typename Key, class Eq_Fn, class Allocator, bool Store_Hash>
	68	struct hash_eq_fn;
	69
	70	#define PB_ASSOC_CLASS_T_DEC \
	71	template<typename Key, class Eq_Fn, class Allocator>
	72
	73	#define PB_ASSOC_CLASS_C_DEC \
	74	hash_eq_fn< \
	75	Key, \
	76	Eq_Fn, \
	77	Allocator, \
	78	false>
	79
	80	/**
	81	* Specialization 1- The client requests that hash values not be stored.
	82	**/
83	template<typename Key, class Eq_Fn, class Allocator>
84	struct hash_eq_fn<Key, Eq_Fn, Allocator, false> : public Eq_Fn
85	{
86	typedef Eq_Fn my_eq_fn_base;
87
88	typedef typename Allocator::template rebind<Key>::other key_allocator;
89
90	typedef typename key_allocator::const_reference const_key_reference;
91
92	hash_eq_fn();
93
94	hash_eq_fn(const Eq_Fn& r_eq_fn);
95
96	inline bool
97	operator()(const_key_reference r_lhs_key, const_key_reference r_rhs_key) const;
98
99	inline void
100	swap(const PB_ASSOC_CLASS_C_DEC& r_other);
101	};
102
103	PB_ASSOC_CLASS_T_DEC
104	PB_ASSOC_CLASS_C_DEC::
105	hash_eq_fn()
106	{ }
107
108	PB_ASSOC_CLASS_T_DEC
109	inline void
110	PB_ASSOC_CLASS_C_DEC::
111	swap(const PB_ASSOC_CLASS_C_DEC& r_other)
112	{
113	std::swap((Eq_Fn& )(*this), (Eq_Fn& )r_other);
114	}
115
116	PB_ASSOC_CLASS_T_DEC
117	PB_ASSOC_CLASS_C_DEC::
118	hash_eq_fn(const Eq_Fn& r_eq_fn) :
119	Eq_Fn(r_eq_fn)
120	{ }
121
122	PB_ASSOC_CLASS_T_DEC
123	inline bool
124	PB_ASSOC_CLASS_C_DEC::
125	operator()(const_key_reference r_lhs_key, const_key_reference r_rhs_key) const
126	{
127	return (my_eq_fn_base::operator()(r_lhs_key, r_rhs_key));
128	}
129
130	#undef PB_ASSOC_CLASS_T_DEC
131	#undef PB_ASSOC_CLASS_C_DEC
132
133	#define PB_ASSOC_CLASS_T_DEC \
134	template<typename Key, class Eq_Fn, class Allocator>
135
136	#define PB_ASSOC_CLASS_C_DEC \
137	hash_eq_fn< \
138	Key, \
139	Eq_Fn, \
140	Allocator, \
141	true>
142
143	/**
144	* Specialization 2- The client requests that hash values be stored.
145	**/
146	template<typename Key, class Eq_Fn, class Allocator>
147	struct hash_eq_fn<Key, Eq_Fn, Allocator, true> :
148	public Eq_Fn
149	{
150	typedef typename Allocator::size_type size_type;
151
152	typedef Eq_Fn my_eq_fn_base;
153
154	typedef typename Allocator::template rebind<Key>::other key_allocator;
155
156	typedef typename key_allocator::const_reference const_key_reference;
157
158	hash_eq_fn();
159
160	hash_eq_fn(const Eq_Fn& r_eq_fn);
161
162	inline bool
163	operator()(const_key_reference r_lhs_key, size_type lhs_hash, const_key_reference r_rhs_key, size_type rhs_hash) const;
164
165	inline void
166	swap(const PB_ASSOC_CLASS_C_DEC& r_other);
167	};
168
169	PB_ASSOC_CLASS_T_DEC
170	PB_ASSOC_CLASS_C_DEC::
171	hash_eq_fn()
172	{ }
173
174	PB_ASSOC_CLASS_T_DEC
175	PB_ASSOC_CLASS_C_DEC::
176	hash_eq_fn(const Eq_Fn& r_eq_fn) :
177	Eq_Fn(r_eq_fn)
178	{ }
179
180	PB_ASSOC_CLASS_T_DEC
181	inline bool
182	PB_ASSOC_CLASS_C_DEC::
183	operator()(const_key_reference r_lhs_key, size_type lhs_hash, const_key_reference r_rhs_key, size_type rhs_hash) const
184	{
185	PB_ASSOC_DBG_ASSERT(!my_eq_fn_base::operator()(r_lhs_key, r_rhs_key) \|\|
186	lhs_hash == rhs_hash);
187
188	return (lhs_hash == rhs_hash&&
189	my_eq_fn_base::operator()(r_lhs_key, r_rhs_key));
190	}
191
192	PB_ASSOC_CLASS_T_DEC
193	inline void
194	PB_ASSOC_CLASS_C_DEC::
195	swap(const PB_ASSOC_CLASS_C_DEC& r_other)
196	{
197	std::swap((Eq_Fn& )(*this), (Eq_Fn& )(r_other));
198	}
199
200	#undef PB_ASSOC_CLASS_T_DEC
201	#undef PB_ASSOC_CLASS_C_DEC
202
203	#undef PB_ASSOC_DBG_ASSERT
204	#undef PB_ASSOC_DBG_VERIFY
205	#undef PB_ASSOC_DBG_ONLY
206
207	} // namespace detail
208
209	} // namespace pb_assoc
210
211	#endif // #ifndef HASH_EQ_FN_HPP