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 #import <Cocoa/Cocoa.h> 28 #import "ANTLRTokenStream.h" 29 #import "ANTLRTokenSource.h" 30 #import "ANTLRBitSet.h" 31 32 @interface ANTLRBufferedTokenStream : NSObject <ANTLRTokenStream> 33 { 34 id<ANTLRTokenSource> tokenSource; 35 36 /** Record every single token pulled from the source so we can reproduce 37 * chunks of it later. The buffer in LookaheadStream overlaps sometimes 38 * as its moving window moves through the input. This list captures 39 * everything so we can access complete input text. 40 */ 41 NSMutableArray *tokens; 42 43 /** Track the last mark() call result value for use in rewind(). */ 44 NSInteger lastMarker; 45 46 /** The index into the tokens list of the current token (next token 47 * to consume). tokens[p] should be LT(1). p=-1 indicates need 48 * to initialize with first token. The ctor doesn't get a token. 49 * First call to LT(1) or whatever gets the first token and sets p=0; 50 */ 51 NSInteger p; 52 53 NSInteger range; // how deep have we gone? 54 55 } 56 @property (retain, getter=getTokenSource,setter=setTokenSource) id<ANTLRTokenSource> tokenSource; 57 @property (retain, getter=getTokens,setter=setTokens) NSMutableArray *tokens; 58 @property (assign, getter=getLastMarker,setter=setLastMarker) NSInteger lastMarker; 59 @property (assign, getter=getIndex,setter=setIndex) NSInteger p; 60 @property (assign, getter=getRange,setter=setRange) NSInteger range; 61 62 + (ANTLRBufferedTokenStream *) newANTLRBufferedTokenStream; 63 + (ANTLRBufferedTokenStream *) newANTLRBufferedTokenStreamWith:(id<ANTLRTokenSource>)aSource; 64 - (id) initWithSource:(id<ANTLRTokenSource>)aSource; 65 - (id) copyWithZone:(NSZone *)aZone; 66 - (NSInteger) getIndex; 67 - (void) setIndex:(NSInteger)index; 68 - (NSInteger) getRange; 69 - (void) setRange:(NSInteger)anInt; 70 - (NSInteger) mark; 71 - (void) release:(NSInteger) marker; 72 - (void) rewind:(NSInteger) marker; 73 - (void) rewind; 74 - (void) reset; 75 - (void) seek:(NSInteger) index; 76 - (NSInteger) size; 77 - (void) consume; 78 - (void) sync:(NSInteger) i; 79 - (void) fetch:(NSInteger) n; 80 - (id<ANTLRToken>) getToken:(NSInteger) i; 81 - (NSMutableArray *)getFrom:(NSInteger)startIndex To:(NSInteger) stopIndex; 82 - (NSInteger) LA:(NSInteger)k; 83 - (id<ANTLRToken>) LT:(NSInteger) k; 84 - (id<ANTLRToken>) LB:(NSInteger) k; 85 - (void) setup; 86 - (id<ANTLRTokenSource>) getTokenSource; 87 - (void) setTokenSource:(id<ANTLRTokenSource>) aTokenSource; 88 - (NSMutableArray *)getTokens; 89 - (NSString *) getSourceName; 90 - (NSMutableArray *)getTokensFrom:(NSInteger)startIndex To:(NSInteger)stopIndex; 91 - (NSMutableArray *)getTokensFrom:(NSInteger)startIndex To:(NSInteger)stopIndex With:(ANTLRBitSet *)types; 92 - (NSMutableArray *)getTokensFrom:(NSInteger)startIndex To:(NSInteger)stopIndex WithList:(NSMutableArray *)types; 93 - (NSMutableArray *)getTokensFrom:(NSInteger)startIndex To:(NSInteger)stopIndex WithType:(NSInteger)ttype; 94 - (NSString *) toStringFromStart:(NSInteger)startIndex ToEnd:(NSInteger)stopIndex; 95 - (NSString *) toStringFromToken:(id<ANTLRToken>)startIndex ToToken:(id<ANTLRToken>)stopIndex; 96 - (void) fill; 97 98 @end 99