summaryrefslogtreecommitdiffstats
path: root/src/include/cpp-btree/btree_map.h
blob: b83489f07ceb9b8fb2677a9c52722a4d82d57f00 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
// Copyright 2013 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// A btree_map<> implements the STL unique sorted associative container
// interface and the pair associative container interface (a.k.a map<>) using a
// btree. A btree_multimap<> implements the STL multiple sorted associative
// container interface and the pair associtive container interface (a.k.a
// multimap<>) using a btree. See btree.h for details of the btree
// implementation and caveats.

#ifndef UTIL_BTREE_BTREE_MAP_H__
#define UTIL_BTREE_BTREE_MAP_H__

#include <algorithm>
#include <functional>
#include <memory>
#include <string>
#include <utility>

#include "btree.h"
#include "btree_container.h"

namespace btree {

// The btree_map class is needed mainly for its constructors.
template <typename Key, typename Value,
          typename Compare = std::less<Key>,
          typename Alloc = std::allocator<std::pair<const Key, Value> >,
          int TargetNodeSize = 256>
class btree_map : public btree_map_container<
  btree<btree_map_params<Key, Value, Compare, Alloc, TargetNodeSize> > > {

  typedef btree_map<Key, Value, Compare, Alloc, TargetNodeSize> self_type;
  typedef btree_map_params<
    Key, Value, Compare, Alloc, TargetNodeSize> params_type;
  typedef btree<params_type> btree_type;
  typedef btree_map_container<btree_type> super_type;

 public:
  typedef typename btree_type::key_compare key_compare;
  typedef typename btree_type::allocator_type allocator_type;

 public:
  // Default constructor.
  btree_map(const key_compare &comp = key_compare(),
            const allocator_type &alloc = allocator_type())
      : super_type(comp, alloc) {
  }

  // Copy constructor.
  btree_map(const self_type &x)
      : super_type(x) {
  }

  // Range constructor.
  template <class InputIterator>
  btree_map(InputIterator b, InputIterator e,
            const key_compare &comp = key_compare(),
            const allocator_type &alloc = allocator_type())
      : super_type(b, e, comp, alloc) {
  }
};

template <typename K, typename V, typename C, typename A, int N>
inline void swap(btree_map<K, V, C, A, N> &x,
                 btree_map<K, V, C, A, N> &y) {
  x.swap(y);
}

// The btree_multimap class is needed mainly for its constructors.
template <typename Key, typename Value,
          typename Compare = std::less<Key>,
          typename Alloc = std::allocator<std::pair<const Key, Value> >,
          int TargetNodeSize = 256>
class btree_multimap : public btree_multi_container<
  btree<btree_map_params<Key, Value, Compare, Alloc, TargetNodeSize> > > {

  typedef btree_multimap<Key, Value, Compare, Alloc, TargetNodeSize> self_type;
  typedef btree_map_params<
    Key, Value, Compare, Alloc, TargetNodeSize> params_type;
  typedef btree<params_type> btree_type;
  typedef btree_multi_container<btree_type> super_type;

 public:
  typedef typename btree_type::key_compare key_compare;
  typedef typename btree_type::allocator_type allocator_type;
  typedef typename btree_type::data_type data_type;
  typedef typename btree_type::mapped_type mapped_type;

 public:
  // Default constructor.
  btree_multimap(const key_compare &comp = key_compare(),
                 const allocator_type &alloc = allocator_type())
      : super_type(comp, alloc) {
  }

  // Copy constructor.
  btree_multimap(const self_type &x)
      : super_type(x) {
  }

  // Range constructor.
  template <class InputIterator>
  btree_multimap(InputIterator b, InputIterator e,
                 const key_compare &comp = key_compare(),
                 const allocator_type &alloc = allocator_type())
      : super_type(b, e, comp, alloc) {
  }
};

template <typename K, typename V, typename C, typename A, int N>
inline void swap(btree_multimap<K, V, C, A, N> &x,
                 btree_multimap<K, V, C, A, N> &y) {
  x.swap(y);
}

} // namespace btree

#endif  // UTIL_BTREE_BTREE_MAP_H__