/src/lib/storage/set/abstract_avl_set.e

  1-- This file is part of a Liberty Eiffel library.
  2-- See the full copyright at the end.
  3--
  4deferred class ABSTRACT_AVL_SET[E_]
  5
  6inherit
  7   SET[E_]
  8      redefine new_iterator
  9      end
 10
 11insert
 12   AVL_TREE[E_]
 13      rename
 14         set_value_and_key as set_item
 15      export
 16         {ITERATOR_ON_AVL_SET} root
 17      end
 18
 19feature {ANY}
 20   new_iterator: ITERATOR[E_]
 21      do
 22         create {ITERATOR_ON_AVL_SET[E_]} Result.make(Current)
 23      end
 24
 25   add (e: like item)
 26      do
 27         item_memory := e
 28         root := do_insert(root)
 29         next_generation
 30      end
 31
 32   fast_add (e: like item)
 33      do
 34         item_memory := e
 35         root := fast_do_insert(root)
 36         next_generation
 37      end
 38
 39   clear_count, clear_count_and_capacity
 40      do
 41         if not is_empty then
 42            clear_nodes(root)
 43            root := Void
 44            count := 0
 45            map_dirty := True
 46         end
 47         next_generation
 48      end
 49
 50   reference_at (e: like item): like item
 51      local
 52         n: ABSTRACT_AVL_SET_NODE[E_]
 53      do
 54         if root /= Void then
 55            n := root.at(e)
 56            if n /= Void then
 57               Result := n.item
 58            end
 59         end
 60      end
 61
 62   item (index: INTEGER): E_
 63      do
 64         if map_dirty then
 65            build_map
 66         end
 67         Result := map.item(index - 1).item
 68      end
 69
 70feature {}
 71   set_item (n: like a_new_node)
 72      do
 73         n.set(item_memory)
 74      end
 75
 76   set_value (n: like a_new_node)
 77      do
 78      end
 79
 80   a_new_node: ABSTRACT_AVL_SET_NODE[E_]
 81      deferred
 82      end
 83
 84   exchange_and_discard (n1, n2: like a_new_node)
 85      do
 86         map_dirty := True
 87         n1.set_item(n2.item)
 88         rebalance := True
 89         count := count - 1
 90         discard_node(n2)
 91      end
 92
 93feature {}
 94   make
 95      do
 96         create map.make(0)
 97         next_generation
 98      end
 99
100end -- class ABSTRACT_AVL_SET
101--
102-- Copyright (C) 2009-2017: by all the people cited in the AUTHORS file.
103--
104-- Permission is hereby granted, free of charge, to any person obtaining a copy
105-- of this software and associated documentation files (the "Software"), to deal
106-- in the Software without restriction, including without limitation the rights
107-- to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
108-- copies of the Software, and to permit persons to whom the Software is
109-- furnished to do so, subject to the following conditions:
110--
111-- The above copyright notice and this permission notice shall be included in
112-- all copies or substantial portions of the Software.
113--
114-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
115-- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
116-- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
117-- AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
118-- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
119-- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
120-- THE SOFTWARE.