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      1 //
      2 //  ANTLRRuleMemo.m
      3 //  ANTLR
      4 //
      5 //  Created by Alan Condit on 6/16/10.
      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 "ANTLRRuleMemo.h"
     33 
     34 
     35 @implementation ANTLRRuleMemo
     36 
     37 @synthesize startIndex;
     38 @synthesize stopIndex;
     39 
     40 + (ANTLRRuleMemo *)newANTLRRuleMemo
     41 {
     42     return [[ANTLRRuleMemo alloc] init];
     43 }
     44 
     45 + (ANTLRRuleMemo *)newANTLRRuleMemoWithStartIndex:(NSNumber *)anIndex StopIndex:(NSNumber *)aStopIndex
     46 {
     47     return [[ANTLRRuleMemo alloc] initWithStartIndex:anIndex StopIndex:aStopIndex];
     48 }
     49 
     50 - (id) init
     51 {
     52     if ((self = [super init]) != nil ) {
     53         startIndex = nil;
     54         stopIndex = nil;
     55     }
     56     return (self);
     57 }
     58 
     59 - (id) initWithStartIndex:(NSNumber *)aStartIndex StopIndex:(NSNumber *)aStopIndex
     60 {
     61     if ((self = [super init]) != nil ) {
     62         [aStartIndex retain];
     63         startIndex = aStartIndex;
     64         [aStopIndex retain];
     65         stopIndex = aStopIndex;
     66     }
     67     return (self);
     68 }
     69 
     70 - (id) copyWithZone:(NSZone *)aZone
     71 {
     72     ANTLRRuleMemo *copy;
     73     
     74     copy = [super copyWithZone:aZone];
     75     copy.startIndex = startIndex;
     76     copy.stopIndex = stopIndex;
     77     return( copy );
     78 }
     79 
     80 - (NSInteger)count
     81 {
     82     NSInteger aCnt = 0;
     83     
     84     if (startIndex != nil) aCnt++;
     85     if (stopIndex != nil) aCnt++;
     86     return aCnt;
     87 }
     88 
     89 - (NSInteger) size
     90 {
     91     return (2 * sizeof(id));
     92 }
     93 
     94 - (ANTLRRuleMemo *)getRuleWithStartIndex:(NSInteger)aStartIndex
     95 {
     96     ANTLRRuleMemo *aMatchMemo = self;
     97     do {
     98         if (aStartIndex == [aMatchMemo.startIndex integerValue] ) {
     99             return aMatchMemo;
    100         }
    101         aMatchMemo = aMatchMemo.fNext;
    102     } while ( aMatchMemo != nil );
    103     return nil;
    104 }
    105 
    106 - (NSNumber *)getStartIndex:(NSInteger)aStartIndex
    107 {
    108     ANTLRRuleMemo *aMatchMemo = self;
    109     do {
    110         if (aStartIndex == [aMatchMemo.startIndex integerValue] ) {
    111             return aMatchMemo.stopIndex;
    112         }
    113         aMatchMemo = aMatchMemo.fNext;
    114     } while ( aMatchMemo != nil );
    115     return nil;
    116 }
    117 
    118 - (NSNumber *)getStopIndex:(NSInteger)aStartIndex
    119 {
    120     ANTLRRuleMemo *aMatchMemo = self;
    121     do {
    122         if (aStartIndex == [aMatchMemo.startIndex integerValue] ) {
    123             return aMatchMemo.stopIndex;
    124         }
    125         aMatchMemo = aMatchMemo.fNext;
    126     } while ( aMatchMemo != nil );
    127     return nil;
    128 }
    129 
    130 - (NSNumber *)getStartIndex;
    131 {
    132     return startIndex;
    133 }
    134 
    135 - (void)setStartIndex:(NSNumber *)aStartIndex
    136 {
    137     if ( aStartIndex != startIndex ) {
    138         if ( startIndex ) [startIndex release];
    139         [aStartIndex retain];
    140     }
    141     startIndex = aStartIndex;
    142 }
    143 
    144 - (NSNumber *)getStopIndex;
    145 {
    146     return stopIndex;
    147 }
    148 
    149 - (void)setStopIndex:(NSNumber *)aStopIndex
    150 {
    151     if ( aStopIndex != stopIndex ) {
    152         if ( stopIndex ) [stopIndex release];
    153         [aStopIndex retain];
    154     }
    155     stopIndex = aStopIndex;
    156 }
    157 
    158 @end
    159