1 // [The "BSD licence"] 2 // Copyright (c) 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 <Foundation/Foundation.h> 28 #import "Token.h" 29 #import "ANTLRBitSet.h" 30 #import "RuleStack.h" 31 #import "AMutableArray.h" 32 33 @interface RecognizerSharedState : NSObject { 34 __strong AMutableArray *following; // a stack of FOLLOW bitsets used for context sensitive prediction and recovery 35 NSInteger _fsp; // Follow stack pointer 36 BOOL errorRecovery; // are we recovering? 37 NSInteger lastErrorIndex; 38 BOOL failed; // indicate that some match failed 39 NSInteger syntaxErrors; 40 NSInteger backtracking; // the level of backtracking 41 __strong RuleStack *ruleMemo; // store previous results of matching rules so we don't have to do it again. Hook in incremental stuff here, too. 42 43 __strong id<Token> token; 44 NSInteger tokenStartCharIndex; 45 NSUInteger tokenStartLine; 46 NSUInteger tokenStartCharPositionInLine; 47 NSUInteger channel; 48 NSUInteger type; 49 NSString *text; 50 } 51 52 @property (retain, getter=getFollowing, setter=setFollowing:) AMutableArray *following; 53 @property (assign) NSInteger _fsp; 54 @property (assign) BOOL errorRecovery; 55 @property (assign) NSInteger lastErrorIndex; 56 @property (assign, getter=getFailed, setter=setFailed:) BOOL failed; 57 @property (assign) NSInteger syntaxErrors; 58 @property (assign, getter=getBacktracking, setter=setBacktracking:) NSInteger backtracking; 59 @property (retain, getter=getRuleMemo, setter=setRuleMemo:) RuleStack *ruleMemo; 60 @property (copy, getter=getToken, setter=setToken:) id<Token> token; 61 @property (getter=type,setter=setType:) NSUInteger type; 62 @property (getter=channel,setter=setChannel:) NSUInteger channel; 63 @property (getter=getTokenStartLine,setter=setTokenStartLine:) NSUInteger tokenStartLine; 64 @property (getter=charPositionInLine,setter=setCharPositionInLine:) NSUInteger tokenStartCharPositionInLine; 65 @property (getter=getTokenStartCharIndex,setter=setTokenStartCharIndex:) NSInteger tokenStartCharIndex; 66 @property (retain, getter=text, setter=setText:) NSString *text; 67 68 + (RecognizerSharedState *) newRecognizerSharedState; 69 + (RecognizerSharedState *) newRecognizerSharedStateWithRuleLen:(NSInteger)aLen; 70 + (RecognizerSharedState *) newRecognizerSharedState:(RecognizerSharedState *)aState; 71 72 - (id) init; 73 - (id) initWithRuleLen:(NSInteger)aLen; 74 - (id) initWithState:(RecognizerSharedState *)state; 75 76 - (id<Token>) getToken; 77 - (void) setToken:(id<Token>) theToken; 78 79 - (NSUInteger)type; 80 - (void) setType:(NSUInteger) theTokenType; 81 82 - (NSUInteger)channel; 83 - (void) setChannel:(NSUInteger) theChannel; 84 85 - (NSUInteger) getTokenStartLine; 86 - (void) setTokenStartLine:(NSUInteger) theTokenStartLine; 87 88 - (NSUInteger) charPositionInLine; 89 - (void) setCharPositionInLine:(NSUInteger) theCharPosition; 90 91 - (NSInteger) getTokenStartCharIndex; 92 - (void) setTokenStartCharIndex:(NSInteger) theTokenStartCharIndex; 93 94 - (NSString *)text; 95 - (void) setText:(NSString *) theText; 96 97 98 - (AMutableArray *) getFollowing; 99 - (void)setFollowing:(AMutableArray *)aFollow; 100 - (RuleStack *) getRuleMemo; 101 - (void)setRuleMemo:(RuleStack *)aRuleMemo; 102 - (BOOL) isErrorRecovery; 103 - (void) setIsErrorRecovery: (BOOL) flag; 104 105 - (BOOL) getFailed; 106 - (void) setFailed: (BOOL) flag; 107 108 - (NSInteger) getBacktracking; 109 - (void) setBacktracking:(NSInteger) value; 110 - (void) increaseBacktracking; 111 - (void) decreaseBacktracking; 112 - (BOOL) isBacktracking; 113 114 - (NSInteger) lastErrorIndex; 115 - (void) setLastErrorIndex:(NSInteger) value; 116 117 @end 118