1 // 2 // ANTLRLinkBase.m 3 // ANTLR 4 // 5 // Created by Alan Condit on 6/14/10. 6 // [The "BSD licence"] 7 // Copyright (c) 2010 Alan Condit 8 // All rights reserved. 9 // 10 // Redistribution and use in source and binary forms, with or without 11 // modification, are permitted provided that the following conditions 12 // are met: 13 // 1. Redistributions of source code must retain the above copyright 14 // notice, this list of conditions and the following disclaimer. 15 // 2. Redistributions in binary form must reproduce the above copyright 16 // notice, this list of conditions and the following disclaimer in the 17 // documentation and/or other materials provided with the distribution. 18 // 3. The name of the author may not be used to endorse or promote products 19 // derived from this software without specific prior written permission. 20 // 21 // THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 // IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 // OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 // IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 // INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 // NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 // THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 32 #import "ANTLRLinkBase.h" 33 34 @implementation ANTLRLinkBase 35 36 @synthesize fPrev; 37 @synthesize fNext; 38 39 +(id<ANTLRLinkList>)newANTLRLinkBase 40 { 41 return [[ANTLRLinkBase alloc] init]; 42 } 43 44 +(id<ANTLRLinkList>)newANTLRLinkBase:(id<ANTLRLinkList>)np Prev:(id<ANTLRLinkList>)pp 45 { 46 return [[ANTLRLinkBase alloc] initWithPtr:np Prev:pp]; 47 } 48 49 -(id<ANTLRLinkList>)init 50 { 51 if ((self = [super init]) != nil) { 52 fNext = nil; 53 fPrev = nil; 54 } 55 return(self); 56 } 57 58 -(id<ANTLRLinkList>)initWithPtr:(id<ANTLRLinkList>)np Prev:(id<ANTLRLinkList>)pp 59 { 60 if ((self = [super init]) != nil) { 61 fNext = np; 62 fPrev = pp; 63 } 64 return(self); 65 } 66 67 -(void)dealloc 68 { 69 #ifdef DEBUG_DEALLOC 70 NSLog( @"called dealloc in ANTLRLinkBase" ); 71 #endif 72 if (fNext) [fNext dealloc]; 73 if (fPrev) [fPrev dealloc]; 74 [super dealloc]; 75 } 76 77 - (id) copyWithZone:(NSZone *)aZone 78 { 79 ANTLRLinkBase *copy; 80 81 copy = [[self class] allocWithZone:aZone]; 82 copy.fPrev = fPrev; 83 copy.fNext = fNext; 84 return( copy ); 85 } 86 87 -(id<ANTLRLinkList>)append:(id<ANTLRLinkList>)node 88 { 89 node.fPrev = (id<ANTLRLinkList>)self; 90 node.fNext = (id<ANTLRLinkList>)self.fNext; 91 if (node.fNext != nil) 92 node.fNext.fPrev = node; 93 self.fNext = node; 94 return( node ); 95 } 96 97 -(id<ANTLRLinkList>)insert:(id<ANTLRLinkList>)node 98 { 99 node.fNext = self; 100 node.fPrev = self.fPrev; 101 if (node.fPrev != nil) 102 node.fPrev.fNext = node; 103 self.fPrev = node; 104 return( node ); 105 } 106 107 -(id<ANTLRLinkList>)getfNext 108 { 109 return(fNext); 110 } 111 112 -(void)setfNext:(id<ANTLRLinkList>)np 113 { 114 fNext = np; 115 } 116 117 -(id<ANTLRLinkList>)getfPrev 118 { 119 return(fPrev); 120 } 121 122 -(void)setfPrev:(id<ANTLRLinkList>)pp 123 { 124 fPrev = pp; 125 } 126 127 @end 128
