1 // 2 // TreePatternLexer.h 3 // ANTLR 4 // 5 // Created by Alan Condit on 6/18/10. 6 // [The "BSD licence"] 7 // Copyright (c) 2010 Alan Condit 8 // All rights reserved. 9 // 10 // Redistribution and use in source and binary forms, with or without 11 // modification, are permitted provided that the following conditions 12 // are met: 13 // 1. Redistributions of source code must retain the above copyright 14 // notice, this list of conditions and the following disclaimer. 15 // 2. Redistributions in binary form must reproduce the above copyright 16 // notice, this list of conditions and the following disclaimer in the 17 // documentation and/or other materials provided with the distribution. 18 // 3. The name of the author may not be used to endorse or promote products 19 // derived from this software without specific prior written permission. 20 // 21 // THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 // IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 // OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 // IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 // INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 // NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 // THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 32 #import <Foundation/Foundation.h> 33 34 typedef enum { 35 LexerTokenTypeEOF = -1, 36 LexerTokenTypeInvalid, 37 LexerTokenTypeBEGIN, 38 LexerTokenTypeEND, 39 LexerTokenTypeID, 40 LexerTokenTypeARG, 41 LexerTokenTypePERCENT, 42 LexerTokenTypeCOLON, 43 LexerTokenTypeDOT, 44 } LexerTokenType; 45 46 47 @interface TreePatternLexer : NSObject { 48 49 /** The tree pattern to lex like "(A B C)" */ 50 NSString *pattern; 51 52 /** Index into input string */ 53 NSInteger p; 54 55 /** Current char */ 56 NSInteger c; 57 58 /** How long is the pattern in char? */ 59 NSInteger n; 60 61 /** Set when token type is ID or ARG (name mimics Java's StreamTokenizer) */ 62 NSMutableData *sval; 63 __strong char *data; 64 65 BOOL error; 66 67 } 68 69 @property (retain) NSString *pattern; 70 @property (assign) NSInteger p; 71 @property (assign) NSInteger c; 72 @property (assign) NSInteger n; 73 @property (retain, getter=getSval, setter=setSval:) NSMutableData *sval; 74 @property (assign) char *data; 75 @property (assign) BOOL error; 76 77 + (TreePatternLexer *)newTreePatternLexer:(NSString *)aPattern; 78 - (id) init; 79 - (id) initWithPattern:(NSString *)aPattern; 80 81 - (void) dealloc; 82 - (NSInteger) nextToken; 83 - (void) consume; 84 - (NSString *)toString; 85 86 - (NSMutableData *)getSval; 87 - (void) setSval:(NSMutableData *)aSval; 88 89 @end 90