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/* Implementation for Objective-C BinaryTreeNode object
Copyright (C) 1993,1994, 1995 Free Software Foundation, Inc.
Written by: R. Andrew McCallum <mccallum@gnu.ai.mit.edu>
Date: May 1993
This file is part of the GNU Objective C Class Library.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <objects/BinaryTreeNode.h>
@implementation BinaryTreeNode
+ (void) initialize
{
if (self == [BinaryTreeNode class])
[self setVersion:0]; /* beta release */
}
- init
{
[super init];
_left = _right = _parent = nil;
return self;
}
- (void) encodeWithCoder: aCoder
{
[super encodeWithCoder:(id)aCoder];
[aCoder encodeObjectReference:_right withName:"Right BinaryTree Node"];
[aCoder encodeObjectReference:_left withName:"Left BinaryTree Node"];
[aCoder encodeObjectReference:_parent withName:"Parent BinaryTree Node"];
}
- initWithCoder: aCoder
{
[super initWithCoder:aCoder];
[aCoder decodeObjectAt:&_right withName:NULL];
[aCoder decodeObjectAt:&_left withName:NULL];
[aCoder decodeObjectAt:&_parent withName:NULL];
return self;
}
- leftNode
{
return _left;
}
- rightNode
{
return _right;
}
- parentNode
{
return _parent;
}
- setLeftNode: aNode
{
_left = aNode;
return self;
}
- setRightNode: aNode
{
_right = aNode;
return self;
}
- setParentNode: aNode
{
_parent = aNode;
return self;
}
@end
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