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128 lines
3.0 KiB
128 lines
3.0 KiB
4 months ago
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//
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// LinkBase.m
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// ANTLR
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//
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// Created by Alan Condit on 6/14/10.
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// [The "BSD licence"]
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// Copyright (c) 2010 Alan Condit
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions
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// are met:
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// 1. Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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// 3. The name of the author may not be used to endorse or promote products
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// derived from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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// OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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// IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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// NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#import "LinkBase.h"
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@implementation LinkBase
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@synthesize fPrev;
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@synthesize fNext;
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+(id<LinkList>)newLinkBase
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{
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return [[LinkBase alloc] init];
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}
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+(id<LinkList>)newLinkBase:(id<LinkList>)np Prev:(id<LinkList>)pp
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{
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return [[LinkBase alloc] initWithPtr:np Prev:pp];
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}
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-(id<LinkList>)init
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{
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if ((self = [super init]) != nil) {
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fNext = nil;
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fPrev = nil;
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}
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return(self);
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}
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-(id<LinkList>)initWithPtr:(id<LinkList>)np Prev:(id<LinkList>)pp
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{
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if ((self = [super init]) != nil) {
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fNext = np;
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fPrev = pp;
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}
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return(self);
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}
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-(void)dealloc
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{
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#ifdef DEBUG_DEALLOC
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NSLog( @"called dealloc in LinkBase" );
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#endif
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if (fNext) [fNext release];
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if (fPrev) [fPrev release];
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[super dealloc];
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}
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- (id) copyWithZone:(NSZone *)aZone
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{
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LinkBase *copy;
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copy = [[self class] allocWithZone:aZone];
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copy.fPrev = fPrev;
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copy.fNext = fNext;
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return( copy );
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}
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-(id<LinkList>)append:(id<LinkList>)node
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{
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node.fPrev = (id<LinkList>)self;
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node.fNext = (id<LinkList>)self.fNext;
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if (node.fNext != nil)
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node.fNext.fPrev = node;
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self.fNext = node;
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return( node );
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}
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-(id<LinkList>)insert:(id<LinkList>)node
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{
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node.fNext = self;
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node.fPrev = self.fPrev;
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if (node.fPrev != nil)
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node.fPrev.fNext = node;
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self.fPrev = node;
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return( node );
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}
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-(id<LinkList>)getfNext
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{
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return(fNext);
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}
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-(void)setfNext:(id<LinkList>)np
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{
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fNext = np;
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}
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-(id<LinkList>)getfPrev
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{
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return(fPrev);
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}
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-(void)setfPrev:(id<LinkList>)pp
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{
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fPrev = pp;
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}
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@end
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