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103 lines
4.4 KiB
103 lines
4.4 KiB
// [The "BSD licence"]
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// Copyright (c) 2006-2007 Kay Roepke 2010 Alan Condit
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions
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// are met:
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// 1. Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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// 3. The name of the author may not be used to endorse or promote products
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// derived from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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// OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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// IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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// NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#import <Foundation/Foundation.h>
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#import "TokenStream.h"
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#import "TokenSource.h"
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#import "ANTLRBitSet.h"
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#import "CommonToken.h"
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#import "AMutableArray.h"
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@interface BufferedTokenStream : NSObject <TokenStream>
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{
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__strong id<TokenSource> tokenSource;
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/** Record every single token pulled from the source so we can reproduce
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* chunks of it later. The buffer in LookaheadStream overlaps sometimes
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* as its moving window moves through the input. This list captures
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* everything so we can access complete input text.
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*/
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__strong AMutableArray *tokens;
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/** Track the last mark() call result value for use in rewind(). */
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NSInteger lastMarker;
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/** The index into the tokens list of the current token (next token
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* to consume). tokens[index] should be LT(1). index=-1 indicates need
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* to initialize with first token. The ctor doesn't get a token.
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* First call to LT(1) or whatever gets the first token and sets index=0;
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*/
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NSInteger index;
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NSInteger range; // how deep have we gone?
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}
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@property (retain, getter=getTokenSource,setter=setTokenSource:) id<TokenSource> tokenSource;
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@property (retain, getter=getTokens,setter=setTokens:) AMutableArray *tokens;
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@property (assign, getter=getLastMarker,setter=setLastMarker:) NSInteger lastMarker;
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@property (assign) NSInteger index;
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@property (assign, getter=getRange,setter=setRange:) NSInteger range;
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+ (BufferedTokenStream *) newBufferedTokenStream;
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+ (BufferedTokenStream *) newBufferedTokenStreamWith:(id<TokenSource>)aSource;
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- (id) initWithTokenSource:(id<TokenSource>)aSource;
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- (void)dealloc;
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- (id) copyWithZone:(NSZone *)aZone;
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- (NSUInteger)charPositionInLine;
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- (NSUInteger)line;
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- (NSInteger) getRange;
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- (void) setRange:(NSInteger)anInt;
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- (NSInteger) mark;
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- (void) release:(NSInteger) marker;
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- (void) rewind:(NSInteger) marker;
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- (void) rewind;
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- (void) reset;
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- (void) seek:(NSInteger) anIndex;
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- (NSInteger) size;
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- (void) consume;
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- (void) sync:(NSInteger) i;
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- (void) fetch:(NSInteger) n;
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- (id<Token>) getToken:(NSInteger) i;
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- (AMutableArray *)getFrom:(NSInteger)startIndex To:(NSInteger) stopIndex;
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- (NSInteger) LA:(NSInteger)i;
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- (id<Token>) LB:(NSInteger) k;
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- (id<Token>) LT:(NSInteger) k;
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- (void) setup;
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- (id<TokenSource>) getTokenSource;
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- (void) setTokenSource:(id<TokenSource>) aTokenSource;
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- (AMutableArray *)getTokens;
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- (NSString *) getSourceName;
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- (AMutableArray *)getTokensFrom:(NSInteger)startIndex To:(NSInteger)stopIndex;
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- (AMutableArray *)getTokensFrom:(NSInteger)startIndex To:(NSInteger)stopIndex With:(ANTLRBitSet *)types;
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- (AMutableArray *)getTokensFrom:(NSInteger)startIndex To:(NSInteger)stopIndex WithList:(AMutableArray *)types;
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- (AMutableArray *)getTokensFrom:(NSInteger)startIndex To:(NSInteger)stopIndex WithType:(NSInteger)ttype;
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- (NSString *) toString;
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- (NSString *) toStringFromStart:(NSInteger)startIndex ToEnd:(NSInteger)stopIndex;
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- (NSString *) toStringFromToken:(id<Token>)startIndex ToToken:(id<Token>)stopIndex;
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- (void) fill;
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@end
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