[thirdparty/gcc.git] / libstdc++-v3 / include / ext / pb_ds / detail / ov_tree_map_ / node_iterators.hpp

// -*- C++ -*-

// Copyright (C) 2005-2016 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 ov_tree_map_/node_iterators.hpp
 * Contains an implementation class for ov_tree_.
 */

#ifndef PB_DS_OV_TREE_NODE_ITERATORS_HPP
#define PB_DS_OV_TREE_NODE_ITERATORS_HPP

#include <ext/pb_ds/tag_and_trait.hpp>
#include <ext/pb_ds/detail/type_utils.hpp>
#include <debug/debug.h>

namespace __gnu_pbds
{
  namespace detail
  {
#define PB_DS_OV_TREE_CONST_NODE_ITERATOR_C_DEC	\
    ov_tree_node_const_it_<Value_Type, Metadata_Type, _Alloc>

    /// Const node reference.
    template<typename Value_Type, typename Metadata_Type, typename _Alloc>
    class ov_tree_node_const_it_
    {

    protected:
      typedef
      typename _Alloc::template rebind<
      Value_Type>::other::pointer
      pointer;

      typedef
      typename _Alloc::template rebind<
	Value_Type>::other::const_pointer
      const_pointer;

      typedef
      typename _Alloc::template rebind<
	Metadata_Type>::other::const_pointer
      const_metadata_pointer;

      typedef PB_DS_OV_TREE_CONST_NODE_ITERATOR_C_DEC this_type;

    protected:

      template<typename Ptr>
      inline static Ptr
      mid_pointer(Ptr p_begin, Ptr p_end)
      {
	_GLIBCXX_DEBUG_ASSERT(p_end >= p_begin);
	return (p_begin + (p_end - p_begin) / 2);
      }

    public:

      typedef trivial_iterator_tag iterator_category;

      typedef trivial_iterator_difference_type difference_type;

      typedef
      typename _Alloc::template rebind<
	Value_Type>::other::const_pointer
      value_type;

      typedef
      typename _Alloc::template rebind<
	typename remove_const<
	Value_Type>::type>::other::const_pointer
      reference;

      typedef
      typename _Alloc::template rebind<
	typename remove_const<
	Value_Type>::type>::other::const_pointer
      const_reference;

      typedef Metadata_Type metadata_type;

      typedef
      typename _Alloc::template rebind<
	metadata_type>::other::const_reference
      metadata_const_reference;

    public:
      inline
      ov_tree_node_const_it_(const_pointer p_nd = 0,  const_pointer p_begin_nd = 0,  const_pointer p_end_nd = 0,  const_metadata_pointer p_metadata = 0) : m_p_value(const_cast<pointer>(p_nd)), m_p_begin_value(const_cast<pointer>(p_begin_nd)), m_p_end_value(const_cast<pointer>(p_end_nd)), m_p_metadata(p_metadata)
      { }

      inline const_reference
      operator*() const
      { return m_p_value; }

      inline metadata_const_reference
      get_metadata() const
      {
	enum
	  {
	    has_metadata = !is_same<Metadata_Type, null_type>::value
	  };

	PB_DS_STATIC_ASSERT(should_have_metadata, has_metadata);
	_GLIBCXX_DEBUG_ASSERT(m_p_metadata != 0);
	return *m_p_metadata;
      }

      /// Returns the node iterator associated with the left node.
      inline this_type
      get_l_child() const
      {
	if (m_p_begin_value == m_p_value)
	  return (this_type(m_p_begin_value, m_p_begin_value, m_p_begin_value));

	const_metadata_pointer p_begin_metadata =
	  m_p_metadata - (m_p_value - m_p_begin_value);

	return (this_type(mid_pointer(m_p_begin_value, m_p_value),
			  m_p_begin_value,
			  m_p_value,
			  mid_pointer(p_begin_metadata, m_p_metadata)));
      }

      /// Returns the node iterator associated with the right node.
      inline this_type
      get_r_child() const
      {
	if (m_p_value == m_p_end_value)
	  return (this_type(m_p_end_value, m_p_end_value, m_p_end_value));

	const_metadata_pointer p_end_metadata =
	  m_p_metadata + (m_p_end_value - m_p_value);

	return (this_type(mid_pointer(m_p_value + 1, m_p_end_value),
			  m_p_value + 1,
			  m_p_end_value,(m_p_metadata == 0) ?
			  0 : mid_pointer(m_p_metadata + 1, p_end_metadata)));
      }

      inline bool
      operator==(const this_type& other) const
      {
	const bool is_end = m_p_begin_value == m_p_end_value;
	const bool is_other_end = other.m_p_begin_value == other.m_p_end_value;

	if (is_end)
	  return (is_other_end);

	if (is_other_end)
	  return (is_end);

	return m_p_value == other.m_p_value;
      }

      inline bool
      operator!=(const this_type& other) const
      { return !operator==(other); }

    public:
      pointer m_p_value;
      pointer m_p_begin_value;
      pointer m_p_end_value;

      const_metadata_pointer m_p_metadata;
    };

#define PB_DS_OV_TREE_NODE_ITERATOR_C_DEC \
    ov_tree_node_it_<Value_Type, Metadata_Type, _Alloc>

    /// Node reference.
    template<typename Value_Type, typename Metadata_Type, typename _Alloc>
    class ov_tree_node_it_ : public PB_DS_OV_TREE_CONST_NODE_ITERATOR_C_DEC
    {
    private:
      typedef PB_DS_OV_TREE_NODE_ITERATOR_C_DEC this_type;

      typedef PB_DS_OV_TREE_CONST_NODE_ITERATOR_C_DEC base_type;

      typedef typename base_type::pointer pointer;

      typedef typename base_type::const_pointer const_pointer;

      typedef
      typename base_type::const_metadata_pointer
      const_metadata_pointer;

    public:
      typedef trivial_iterator_tag iterator_category;

      typedef trivial_iterator_difference_type difference_type;

      typedef
      typename _Alloc::template rebind<
	Value_Type>::other::pointer
      value_type;

      typedef
      typename _Alloc::template rebind<
	typename remove_const<
	Value_Type>::type>::other::pointer
      reference;

      typedef
      typename _Alloc::template rebind<
	typename remove_const<
	Value_Type>::type>::other::pointer
      const_reference;

      inline
      ov_tree_node_it_(const_pointer p_nd = 0,  const_pointer p_begin_nd = 0,  const_pointer p_end_nd = 0,  const_metadata_pointer p_metadata = 0) : base_type(p_nd,  p_begin_nd,  p_end_nd,  p_metadata)
      { }

      /// Access.
      inline reference
      operator*() const
      { return reference(base_type::m_p_value); }

      /// Returns the node reference associated with the left node.
      inline ov_tree_node_it_
      get_l_child() const
      {
	if (base_type::m_p_begin_value == base_type::m_p_value)
	  return (this_type(base_type::m_p_begin_value,  base_type::m_p_begin_value,  base_type::m_p_begin_value));

	const_metadata_pointer p_begin_metadata =
	  base_type::m_p_metadata - (base_type::m_p_value - base_type::m_p_begin_value);

	return (this_type(base_type::mid_pointer(base_type::m_p_begin_value, base_type::m_p_value),
			  base_type::m_p_begin_value,
			  base_type::m_p_value,
			  base_type::mid_pointer(p_begin_metadata, base_type::m_p_metadata)));
      }

      /// Returns the node reference associated with the right node.
      inline ov_tree_node_it_
      get_r_child() const
      {
	if (base_type::m_p_value == base_type::m_p_end_value)
	  return this_type(base_type::m_p_end_value, base_type::m_p_end_value,  
			   base_type::m_p_end_value);

	const_metadata_pointer p_end_metadata =
	  base_type::m_p_metadata + (base_type::m_p_end_value - base_type::m_p_value);

	return (this_type(base_type::mid_pointer(base_type::m_p_value + 1, base_type::m_p_end_value),
			  base_type::m_p_value + 1,
			  base_type::m_p_end_value,(base_type::m_p_metadata == 0)?
			  0 : base_type::mid_pointer(base_type::m_p_metadata + 1, p_end_metadata)));
      }

    };

#undef PB_DS_OV_TREE_NODE_ITERATOR_C_DEC
#undef PB_DS_OV_TREE_CONST_NODE_ITERATOR_C_DEC

} // namespace detail
} // namespace __gnu_pbds

#endif
Commit	Line	Data
4569a895 AT	1	// -- C++ --
4569a895 AT	2
818ab71a	3	// Copyright (C) 2005-2016 Free Software Foundation, Inc.
4569a895 AT	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 terms
	7	// of the GNU General Public License as published by the Free Software
748086b7	8	// Foundation; either version 3, or (at your option) any later
4569a895 AT	9	// version.
	10
	11	// This library is distributed in the hope that it will be useful, but
	12	// WITHOUT ANY WARRANTY; without even the implied warranty of
	13	// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	// General Public License for more details.
	15
748086b7 JJ	16	// Under Section 7 of GPL version 3, you are granted additional
	17	// permissions described in the GCC Runtime Library Exception, version
	18	// 3.1, as published by the Free Software Foundation.
4569a895	19
748086b7 JJ	20	// You should have received a copy of the GNU General Public License and
	21	// a copy of the GCC Runtime Library Exception along with this program;
	22	// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
	23	// <http://www.gnu.org/licenses/>.
4569a895 AT	24
	25	// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
	26
	27	// Permission to use, copy, modify, sell, and distribute this software
	28	// is hereby granted without fee, provided that the above copyright
	29	// notice appears in all copies, and that both that copyright notice
	30	// and this permission notice appear in supporting documentation. None
	31	// of the above authors, nor IBM Haifa Research Laboratories, make any
	32	// representation about the suitability of this software for any
	33	// purpose. It is provided "as is" without express or implied
	34	// warranty.
	35
	36	/**
a345e45d	37	* @file ov_tree_map_/node_iterators.hpp
4569a895 AT	38	* Contains an implementation class for ov_tree_.
	39	*/
	40
	41	#ifndef PB_DS_OV_TREE_NODE_ITERATORS_HPP
	42	#define PB_DS_OV_TREE_NODE_ITERATORS_HPP
	43
4569a895 AT	44	#include <ext/pb_ds/tag_and_trait.hpp>
4569a895 AT	45	#include <ext/pb_ds/detail/type_utils.hpp>
47bea7b8	46	#include <debug/debug.h>
4569a895	47
5e11f978	48	namespace __gnu_pbds
4569a895 AT	49	{
	50	namespace detail
	51	{
e894edef	52	#define PB_DS_OV_TREE_CONST_NODE_ITERATOR_C_DEC \
a345e45d	53	ov_tree_node_const_it_<Value_Type, Metadata_Type, _Alloc>
4569a895	54
a345e45d BK	55	/// Const node reference.
a345e45d BK	56	template<typename Value_Type, typename Metadata_Type, typename _Alloc>
4569a895 AT	57	class ov_tree_node_const_it_
	58	{
	59
	60	protected:
	61	typedef
a345e45d	62	typename _Alloc::template rebind<
4569a895 AT	63	Value_Type>::other::pointer
	64	pointer;
	65
	66	typedef
a345e45d	67	typename _Alloc::template rebind<
4569a895 AT	68	Value_Type>::other::const_pointer
	69	const_pointer;
	70
	71	typedef
a345e45d	72	typename _Alloc::template rebind<
4569a895 AT	73	Metadata_Type>::other::const_pointer
	74	const_metadata_pointer;
	75
	76	typedef PB_DS_OV_TREE_CONST_NODE_ITERATOR_C_DEC this_type;
	77
	78	protected:
	79
	80	template<typename Ptr>
	81	inline static Ptr
	82	mid_pointer(Ptr p_begin, Ptr p_end)
	83	{
47bea7b8	84	_GLIBCXX_DEBUG_ASSERT(p_end >= p_begin);
4569a895 AT	85	return (p_begin + (p_end - p_begin) / 2);
	86	}
	87
	88	public:
	89
	90	typedef trivial_iterator_tag iterator_category;
	91
	92	typedef trivial_iterator_difference_type difference_type;
	93
	94	typedef
a345e45d	95	typename _Alloc::template rebind<
4569a895 AT	96	Value_Type>::other::const_pointer
	97	value_type;
	98
	99	typedef
a345e45d	100	typename _Alloc::template rebind<
4569a895 AT	101	typename remove_const<
	102	Value_Type>::type>::other::const_pointer
	103	reference;
	104
	105	typedef
a345e45d	106	typename _Alloc::template rebind<
4569a895 AT	107	typename remove_const<
	108	Value_Type>::type>::other::const_pointer
	109	const_reference;
	110
	111	typedef Metadata_Type metadata_type;
	112
	113	typedef
a345e45d	114	typename _Alloc::template rebind<
4569a895	115	metadata_type>::other::const_reference
a345e45d	116	metadata_const_reference;
4569a895 AT	117
	118	public:
	119	inline
8fc81078	120	ov_tree_node_const_it_(const_pointer p_nd = 0, const_pointer p_begin_nd = 0, const_pointer p_end_nd = 0, const_metadata_pointer p_metadata = 0) : m_p_value(const_cast<pointer>(p_nd)), m_p_begin_value(const_cast<pointer>(p_begin_nd)), m_p_end_value(const_cast<pointer>(p_end_nd)), m_p_metadata(p_metadata)
4569a895 AT	121	{ }
	122
	123	inline const_reference
	124	operator*() const
47bea7b8	125	{ return m_p_value; }
4569a895	126
a345e45d	127	inline metadata_const_reference
4569a895 AT	128	get_metadata() const
	129	{
	130	enum
	131	{
a345e45d	132	has_metadata = !is_same<Metadata_Type, null_type>::value
4569a895 AT	133	};
	134
	135	PB_DS_STATIC_ASSERT(should_have_metadata, has_metadata);
8fc81078	136	_GLIBCXX_DEBUG_ASSERT(m_p_metadata != 0);
47bea7b8	137	return *m_p_metadata;
4569a895 AT	138	}
4569a895 AT	139
30a96b3b	140	/// Returns the node iterator associated with the left node.
4569a895 AT	141	inline this_type
	142	get_l_child() const
	143	{
	144	if (m_p_begin_value == m_p_value)
47bea7b8	145	return (this_type(m_p_begin_value, m_p_begin_value, m_p_begin_value));
4569a895 AT	146
	147	const_metadata_pointer p_begin_metadata =
	148	m_p_metadata - (m_p_value - m_p_begin_value);
	149
47bea7b8	150	return (this_type(mid_pointer(m_p_begin_value, m_p_value),
4569a895 AT	151	m_p_begin_value,
	152	m_p_value,
	153	mid_pointer(p_begin_metadata, m_p_metadata)));
	154	}
	155
30a96b3b	156	/// Returns the node iterator associated with the right node.
4569a895 AT	157	inline this_type
	158	get_r_child() const
	159	{
	160	if (m_p_value == m_p_end_value)
30a96b3b	161	return (this_type(m_p_end_value, m_p_end_value, m_p_end_value));
4569a895 AT	162
	163	const_metadata_pointer p_end_metadata =
	164	m_p_metadata + (m_p_end_value - m_p_value);
	165
47bea7b8	166	return (this_type(mid_pointer(m_p_value + 1, m_p_end_value),
4569a895	167	m_p_value + 1,
8fc81078 PC	168	m_p_end_value,(m_p_metadata == 0) ?
8fc81078 PC	169	0 : mid_pointer(m_p_metadata + 1, p_end_metadata)));
4569a895 AT	170	}
	171
	172	inline bool
	173	operator==(const this_type& other) const
	174	{
	175	const bool is_end = m_p_begin_value == m_p_end_value;
	176	const bool is_other_end = other.m_p_begin_value == other.m_p_end_value;
	177
	178	if (is_end)
	179	return (is_other_end);
	180
	181	if (is_other_end)
	182	return (is_end);
	183
47bea7b8	184	return m_p_value == other.m_p_value;
4569a895 AT	185	}
	186
	187	inline bool
	188	operator!=(const this_type& other) const
47bea7b8	189	{ return !operator==(other); }
4569a895 AT	190
	191	public:
	192	pointer m_p_value;
	193	pointer m_p_begin_value;
	194	pointer m_p_end_value;
	195
	196	const_metadata_pointer m_p_metadata;
	197	};
	198
e894edef	199	#define PB_DS_OV_TREE_NODE_ITERATOR_C_DEC \
a345e45d	200	ov_tree_node_it_<Value_Type, Metadata_Type, _Alloc>
4569a895	201
a345e45d BK	202	/// Node reference.
a345e45d BK	203	template<typename Value_Type, typename Metadata_Type, typename _Alloc>
4569a895 AT	204	class ov_tree_node_it_ : public PB_DS_OV_TREE_CONST_NODE_ITERATOR_C_DEC
4569a895 AT	205	{
4569a895 AT	206	private:
	207	typedef PB_DS_OV_TREE_NODE_ITERATOR_C_DEC this_type;
	208
	209	typedef PB_DS_OV_TREE_CONST_NODE_ITERATOR_C_DEC base_type;
	210
	211	typedef typename base_type::pointer pointer;
	212
	213	typedef typename base_type::const_pointer const_pointer;
	214
	215	typedef
	216	typename base_type::const_metadata_pointer
	217	const_metadata_pointer;
	218
	219	public:
4569a895 AT	220	typedef trivial_iterator_tag iterator_category;
	221
	222	typedef trivial_iterator_difference_type difference_type;
	223
	224	typedef
a345e45d	225	typename _Alloc::template rebind<
4569a895 AT	226	Value_Type>::other::pointer
	227	value_type;
	228
	229	typedef
a345e45d	230	typename _Alloc::template rebind<
4569a895 AT	231	typename remove_const<
	232	Value_Type>::type>::other::pointer
	233	reference;
	234
	235	typedef
a345e45d	236	typename _Alloc::template rebind<
4569a895 AT	237	typename remove_const<
	238	Value_Type>::type>::other::pointer
	239	const_reference;
	240
4569a895	241	inline
8fc81078	242	ov_tree_node_it_(const_pointer p_nd = 0, const_pointer p_begin_nd = 0, const_pointer p_end_nd = 0, const_metadata_pointer p_metadata = 0) : base_type(p_nd, p_begin_nd, p_end_nd, p_metadata)
4569a895 AT	243	{ }
4569a895 AT	244
30a96b3b	245	/// Access.
4569a895 AT	246	inline reference
4569a895 AT	247	operator*() const
47bea7b8	248	{ return reference(base_type::m_p_value); }
4569a895	249
30a96b3b	250	/// Returns the node reference associated with the left node.
4569a895 AT	251	inline ov_tree_node_it_
	252	get_l_child() const
	253	{
	254	if (base_type::m_p_begin_value == base_type::m_p_value)
47bea7b8	255	return (this_type(base_type::m_p_begin_value, base_type::m_p_begin_value, base_type::m_p_begin_value));
4569a895 AT	256
	257	const_metadata_pointer p_begin_metadata =
	258	base_type::m_p_metadata - (base_type::m_p_value - base_type::m_p_begin_value);
	259
47bea7b8	260	return (this_type(base_type::mid_pointer(base_type::m_p_begin_value, base_type::m_p_value),
4569a895 AT	261	base_type::m_p_begin_value,
	262	base_type::m_p_value,
	263	base_type::mid_pointer(p_begin_metadata, base_type::m_p_metadata)));
	264	}
	265
30a96b3b	266	/// Returns the node reference associated with the right node.
4569a895 AT	267	inline ov_tree_node_it_
	268	get_r_child() const
	269	{
	270	if (base_type::m_p_value == base_type::m_p_end_value)
30a96b3b	271	return this_type(base_type::m_p_end_value, base_type::m_p_end_value,
a345e45d	272	base_type::m_p_end_value);
4569a895 AT	273
	274	const_metadata_pointer p_end_metadata =
	275	base_type::m_p_metadata + (base_type::m_p_end_value - base_type::m_p_value);
	276
47bea7b8	277	return (this_type(base_type::mid_pointer(base_type::m_p_value + 1, base_type::m_p_end_value),
4569a895	278	base_type::m_p_value + 1,
8fc81078 PC	279	base_type::m_p_end_value,(base_type::m_p_metadata == 0)?
8fc81078 PC	280	0 : base_type::mid_pointer(base_type::m_p_metadata + 1, p_end_metadata)));
4569a895 AT	281	}
	282
	283	};
	284
	285	#undef PB_DS_OV_TREE_NODE_ITERATOR_C_DEC
4569a895	286	#undef PB_DS_OV_TREE_CONST_NODE_ITERATOR_C_DEC
4569a895	287
47bea7b8	288	} // namespace detail
5e11f978	289	} // namespace __gnu_pbds
4569a895	290
47bea7b8	291	#endif