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      1 //
      2 //  ANTLRSymbolStack.m
      3 //  ANTLR
      4 //
      5 //  Created by Alan Condit on 6/9/10.
      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 #define SUCCESS (0)
     33 #define FAILURE (-1)
     34 
     35 #import "ANTLRSymbolStack.h"
     36 #import "ANTLRTree.h"
     37 
     38 
     39 @implementation ANTLRSymbolsScope
     40 
     41 + (ANTLRSymbolsScope *)newANTLRSymbolsScope
     42 {
     43     return( [[ANTLRSymbolsScope alloc] init] );
     44 }
     45 
     46 - (id)init
     47 {
     48     if ((self = [super init]) != nil) {
     49     }
     50     return (self);
     51 }
     52 
     53 @end
     54 
     55 /*
     56  * Start of ANTLRSymbolStack
     57  */
     58 @implementation ANTLRSymbolStack
     59 
     60 +(ANTLRSymbolStack *)newANTLRSymbolStack
     61 {
     62     return [[ANTLRSymbolStack alloc] init];
     63 }
     64 
     65 +(ANTLRSymbolStack *)newANTLRSymbolStackWithLen:(NSInteger)cnt
     66 {
     67     return [[ANTLRSymbolStack alloc] initWithLen:cnt];
     68 }
     69 
     70 -(id)init
     71 {
     72 	if ((self = [super init]) != nil) {
     73 	}
     74     return( self );
     75 }
     76 
     77 -(id)initWithLen:(NSInteger)cnt
     78 {
     79 	if ((self = [super initWithLen:cnt]) != nil) {
     80 	}
     81     return( self );
     82 }
     83 
     84 -(void)dealloc
     85 {
     86 	[super dealloc];
     87 }
     88 
     89 - (id) copyWithZone:(NSZone *)aZone
     90 {
     91     return [super copyWithZone:aZone];
     92 }
     93 
     94 -(ANTLRSymbolsScope *)getHashMapEntry:(NSInteger)idx
     95 {
     96 	return( (ANTLRSymbolsScope *)[super objectAtIndex:idx] );
     97 }
     98 
     99 -(ANTLRSymbolsScope **)getHashMap
    100 {
    101 	return( (ANTLRSymbolsScope **)ptrBuffer );
    102 }
    103 
    104 -(ANTLRSymbolsScope *) pop
    105 {
    106     return (ANTLRSymbolsScope *)[super pop];
    107 }
    108 
    109 - (void) insertObject:(ANTLRSymbolsScope *)aRule atIndex:(NSInteger)idx
    110 {
    111     if (aRule != ptrBuffer[idx]) {
    112         if (ptrBuffer[idx] != nil) [ptrBuffer[idx] release];
    113         [aRule retain];
    114     }
    115     ptrBuffer[idx] = aRule;
    116 }
    117 
    118 - (ANTLRSymbolsScope *)objectAtIndex:(NSInteger)idx
    119 {
    120     return (ANTLRSymbolsScope *)[super objectAtIndex:idx];
    121 }
    122 
    123 @end
    124