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- // This may look like C code, but it is really -*- C++ -*-
- /*
- Copyright (C) 1988 Free Software Foundation
- written by Doug Lea (dl@rocky.oswego.edu)
-
- This file is part of GNU CC.
-
- GNU CC is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY. No author or distributor
- accepts responsibility to anyone for the consequences of using it
- or for whether it serves any particular purpose or works at all,
- unless he says so in writing. Refer to the GNU CC General Public
- License for full details.
-
- Everyone is granted permission to copy, modify and redistribute
- GNU CC, but only under the conditions described in the
- GNU CC General Public License. A copy of this license is
- supposed to have been given to you along with GNU CC so you
- can know your rights and responsibilities. It should be in a
- file named COPYING. Among other things, the copyright notice
- and this notice must be preserved on all copies.
- */
-
-
- #ifndef _<T>BSTSet_h
- #pragma once
- #define _<T>BSTSet_h 1
-
- #include "<T>.Set.h"
-
- #ifndef _<T>BSTNode
- #define _<T>BSTNode 1
-
- struct <T>BSTNode
- {
- <T>BSTNode* lt;
- <T>BSTNode* rt;
- <T>BSTNode* par;
- <T> item;
- <T>BSTNode(<T&> h, <T>BSTNode* l=0, <T>BSTNode* r=0,
- <T>BSTNode* p = 0);
- ~<T>BSTNode();
- };
-
-
- inline <T>BSTNode::<T>BSTNode(<T&> h, <T>BSTNode* l=0, <T>BSTNode* r=0,
- <T>BSTNode* p = 0)
- {
- item = h;
- lt = l;
- rt = r;
- par = p;
- }
-
- inline <T>BSTNode::~<T>BSTNode() {}
-
- typedef <T>BSTNode* <T>BSTNodePtr;
-
- #endif
-
- class <T>BSTSet : public <T>Set
- {
- protected:
- <T>BSTNode* root;
-
- <T>BSTNode* leftmost();
- <T>BSTNode* rightmost();
- <T>BSTNode* pred(<T>BSTNode* t);
- <T>BSTNode* succ(<T>BSTNode* t);
- void _kill(<T>BSTNode* t);
- <T>BSTNode* _copy(<T>BSTNode* t);
-
- public:
- <T>BSTSet();
- <T>BSTSet(<T>BSTSet& a);
- ~<T>BSTSet();
-
- Pix add(<T&> item);
- void del(<T&> item);
- int contains(<T&> item);
-
- void clear();
-
- Pix first();
- void next(Pix& i);
- <T>& operator () (Pix i);
- Pix seek(<T&> item);
-
- Pix last();
- void prev(Pix& i);
-
- int operator == (<T>BSTSet& b);
- int operator != (<T>BSTSet& b);
- int operator <= (<T>BSTSet& b);
-
- void balance();
- int OK();
- };
-
- inline <T>BSTSet::~<T>BSTSet()
- {
- _kill(root);
- }
-
- inline <T>BSTSet::<T>BSTSet()
- {
- root = 0;
- count = 0;
- }
-
-
- inline <T>BSTSet::<T>BSTSet(<T>BSTSet& a)
- {
- count = a.count;
- root = _copy(a.root);
- }
-
- inline int <T>BSTSet::operator != (<T>BSTSet& b)
- {
- return ! (*this == b);
- }
-
- inline Pix <T>BSTSet::first()
- {
- return Pix(leftmost());
- }
-
- inline Pix <T>BSTSet::last()
- {
- return Pix(rightmost());
- }
-
- inline void <T>BSTSet::next(Pix& i)
- {
- if (i != 0) i = Pix(succ((<T>BSTNode*)i));
- }
-
- inline void <T>BSTSet::prev(Pix& i)
- {
- if (i != 0) i = Pix(pred((<T>BSTNode*)i));
- }
-
- inline <T>& <T>BSTSet::operator () (Pix i)
- {
- if (i == 0) error("null Pix");
- return ((<T>BSTNode*)i)->item;
- }
-
- inline void <T>BSTSet::clear()
- {
- _kill(root);
- count = 0;
- root = 0;
- }
-
- inline int <T>BSTSet::contains(<T&> key)
- {
- return seek(key) != 0;
- }
-
-
- #endif
-