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78 lines
2.8 KiB
78 lines
2.8 KiB
//
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// LookaheadStream.h
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// ANTLR
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//
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// Created by Ian Michell on 26/04/2010.
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// [The "BSD licence"]
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// Copyright (c) 2010 Ian Michell 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 "FastQueue.h"
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#define UNITIALIZED_EOF_ELEMENT_INDEX NSIntegerMax
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@interface LookaheadStream : FastQueue
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{
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NSInteger index;
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NSInteger eofElementIndex;
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NSInteger lastMarker;
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NSInteger markDepth;
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id prevElement;
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id eof;
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}
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@property (readwrite, retain, getter=getEof, setter=setEof:) id eof;
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@property (assign) NSInteger index;
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@property (assign, getter=getEofElementIndex, setter=setEofElementIndex:) NSInteger eofElementIndex;
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@property (assign, getter=getLastMarker, setter=setLastMarker:) NSInteger lastMarker;
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@property (assign, getter=getMarkDepth, setter=setMarkDepth:) NSInteger markDepth;
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@property (retain) id prevElement;
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- (id) initWithEOF:(id) obj;
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- (id) nextElement;
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- (id) remove;
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- (void) consume;
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- (void) sync:(NSInteger) need;
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- (void) fill:(NSInteger) n;
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- (id) LT:(NSInteger) i;
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- (id) LB:(NSInteger) i;
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- (id) getCurrentSymbol;
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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) seek:(NSInteger) i;
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- (id) getEof;
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- (void) setEof:(id) anID;
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- (NSInteger) getEofElementIndex;
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- (void) setEofElementIndex:(NSInteger) anInt;
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- (NSInteger) getLastMarker;
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- (void) setLastMarker:(NSInteger) anInt;
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- (NSInteger) getMarkDepth;
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- (void) setMarkDepth:(NSInteger) anInt;
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@end
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