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