1 // [The "BSD licence"] 2 // Copyright (c) 2006-2007 Kay Roepke 2010 Alan Condit 3 // All rights reserved. 4 // 5 // Redistribution and use in source and binary forms, with or without 6 // modification, are permitted provided that the following conditions 7 // are met: 8 // 1. Redistributions of source code must retain the above copyright 9 // notice, this list of conditions and the following disclaimer. 10 // 2. Redistributions in binary form must reproduce the above copyright 11 // notice, this list of conditions and the following disclaimer in the 12 // documentation and/or other materials provided with the distribution. 13 // 3. The name of the author may not be used to endorse or promote products 14 // derived from this software without specific prior written permission. 15 // 16 // THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 // IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 // OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 // IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 // INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 // NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 // THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 27 28 #import <Cocoa/Cocoa.h> 29 #import "ANTLRTreeNodeStream.h" 30 #import "ANTLRCommonTokenStream.h" 31 #import "ANTLRCommonTree.h" 32 #import "ANTLRCommonTreeAdaptor.h" 33 34 @interface ANTLRUnbufferedCommonTreeNodeStream : NSObject < ANTLRTreeNodeStream > { 35 36 BOOL shouldUseUniqueNavigationNodes; 37 38 ANTLRCommonTree *root; 39 ANTLRCommonTree *currentNode; 40 ANTLRCommonTree *previousNode; 41 42 id<ANTLRTreeAdaptor> treeAdaptor; 43 44 id<ANTLRTokenStream> tokenStream; 45 46 NSMutableArray *nodeStack; 47 NSMutableArray *indexStack; 48 ANTLRPtrBuffer *markers; 49 NSInteger lastMarker; 50 51 NSInteger currentChildIndex; 52 NSInteger absoluteNodeIndex; 53 54 NSMutableArray *lookahead; 55 NSUInteger head; 56 NSUInteger tail; 57 } 58 59 @property (retain, getter=getRoot, setter=setRoot:) ANTLRCommonTree *root; 60 @property (retain, getter=getCurrentNode, setter=setCurrentNode:) ANTLRCommonTree *currentNode; 61 @property (retain, getter=getPreviousNode, setter=setPreviousNode:) ANTLRCommonTree *previousNode; 62 @property (retain, getter=getTreeAdaptor, setter=setTreeAdaptor:) id<ANTLRTreeAdaptor> treeAdaptor; 63 @property (retain, getter=getTokenStream, setter=setTokenStream:) id<ANTLRTokenStream> tokenStream; 64 @property (retain, getter=getNodeStack, setter=setNodeStack:) NSMutableArray *nodeStack; 65 @property (retain, getter=getIndexStack, setter=setIndexStackStack:) NSMutableArray *indexStack; 66 @property (retain, getter=getMarkers, setter=setMarkers:) ANTLRPtrBuffer *markers; 67 @property (assign, getter=getLastMarker, setter=setLastMarker:) NSInteger lastMarker; 68 @property (assign, getter=getCurrentChildIndex, setter=setCurrentChildIndex:) NSInteger currentChildIndex; 69 @property (assign, getter=getAbsoluteNodeIndex, setter=setAbsoluteNodeIndex:) NSInteger absoluteNodeIndex; 70 @property (retain, getter=getLookahead, setter=setLookahead:) NSMutableArray *lookahead; 71 @property (assign, getter=getHead, setter=setHead:) NSUInteger head; 72 @property (assign, getter=getTail, setter=setTail:) NSUInteger tail; 73 74 - (id) initWithTree:(ANTLRCommonTree *)theTree; 75 - (id) initWithTree:(ANTLRCommonTree *)theTree treeAdaptor:(ANTLRCommonTreeAdaptor *)theAdaptor; 76 77 - (void) reset; 78 79 #pragma mark ANTLRTreeNodeStream conformance 80 81 - (id) LT:(NSInteger)k; 82 - (id) treeSource; 83 - (id<ANTLRTreeAdaptor>) getTreeAdaptor; 84 - (void)setTreeAdaptor:(id<ANTLRTreeAdaptor>)aTreeAdaptor; 85 - (id<ANTLRTokenStream>) getTokenStream; 86 - (void) setTokenStream:(id<ANTLRTokenStream>)aTokenStream; ///< Added by subclass, not in protocol 87 - (void) setUsesUniqueNavigationNodes:(BOOL)flag; 88 89 - (id) nodeAtIndex:(NSUInteger) idx; 90 91 - (NSString *) toString; 92 - (NSString *) toStringWithRange:(NSRange) aRange; 93 - (NSString *) toStringFromNode:(id)startNode toNode:(id)stopNode; 94 95 #pragma mark ANTLRIntStream conformance 96 - (void) consume; 97 - (NSInteger) LA:(NSUInteger) i; 98 - (NSUInteger) mark; 99 - (NSUInteger) getIndex; 100 - (void) rewind:(NSUInteger) marker; 101 - (void) rewind; 102 - (void) release:(NSUInteger) marker; 103 - (void) seek:(NSUInteger) index; 104 - (NSUInteger) size; 105 106 #pragma mark Lookahead Handling 107 - (void) addLookahead:(id<ANTLRBaseTree>)aNode; 108 - (NSUInteger) lookaheadSize; 109 - (void) fillBufferWithLookahead:(NSInteger)k; 110 - (id) nextObject; 111 112 #pragma mark Node visiting 113 - (ANTLRCommonTree *) handleRootNode; 114 - (ANTLRCommonTree *) visitChild:(NSInteger)childNumber; 115 - (void) walkBackToMostRecentNodeWithUnvisitedChildren; 116 - (void) addNavigationNodeWithType:(NSInteger)tokenType; 117 118 #pragma mark Accessors 119 - (ANTLRCommonTree *) root; 120 - (void) setRoot: (ANTLRCommonTree *) aRoot; 121 122 @end 123