| // [The "BSD licence"] |
| // Copyright (c) 2006-2007 Kay Roepke 2010 Alan Condit |
| // All rights reserved. |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions |
| // are met: |
| // 1. Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // 2. Redistributions in binary form must reproduce the above copyright |
| // notice, this list of conditions and the following disclaimer in the |
| // documentation and/or other materials provided with the distribution. |
| // 3. The name of the author may not be used to endorse or promote products |
| // derived from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| // IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| // OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| // IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| // INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| // NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| // THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #import "ANTLRParser.h" |
| |
| |
| @implementation ANTLRParser |
| |
| + (ANTLRParser *)newANTLRParser:(id<ANTLRTokenStream>)anInput |
| { |
| return [[ANTLRParser alloc] initWithTokenStream:anInput]; |
| } |
| |
| + (ANTLRParser *)newANTLRParser:(id<ANTLRTokenStream>)anInput State:(ANTLRRecognizerSharedState *)aState |
| { |
| return [[ANTLRParser alloc] initWithTokenStream:anInput State:aState]; |
| } |
| |
| - (id) initWithTokenStream:(id<ANTLRTokenStream>)theStream |
| { |
| if ((self = [super init]) != nil) { |
| input = theStream; |
| } |
| return self; |
| } |
| |
| - (id) initWithTokenStream:(id<ANTLRTokenStream>)theStream State:(ANTLRRecognizerSharedState *)aState |
| { |
| if ((self = [super initWithState:aState]) != nil) { |
| input = theStream; |
| } |
| return self; |
| } |
| |
| - (void) reset |
| { |
| [super reset]; // reset all recognizer state variables |
| if ( input!=nil ) { |
| [input seek:0]; // rewind the input |
| } |
| } |
| |
| - (void) dealloc |
| { |
| #ifdef DEBUG_DEALLOC |
| NSLog( @"called dealloc in ANTLRParser" ); |
| #endif |
| [self setInput:nil]; |
| [super dealloc]; |
| } |
| |
| //---------------------------------------------------------- |
| // input |
| //---------------------------------------------------------- |
| - (id<ANTLRTokenStream>) input |
| { |
| return input; |
| } |
| |
| - (void) setInput: (id<ANTLRTokenStream>) anInput |
| { |
| if (input != anInput) { |
| if ( input ) [input release]; |
| [anInput retain]; |
| } |
| input = anInput; |
| } |
| |
| - (id) getCurrentInputSymbol:(id<ANTLRTokenStream>)anInput |
| { |
| state.token = [input LT:1]; |
| return state.token; |
| } |
| |
| - (ANTLRCommonToken *)getMissingSymbol:(id<ANTLRTokenStream>)anInput |
| Exception:(ANTLRRecognitionException *)e |
| TType:(NSInteger)expectedTokenType |
| BitSet:(ANTLRBitSet *)follow |
| { |
| NSString *tokenText = nil; |
| if ( expectedTokenType == ANTLRTokenTypeEOF ) |
| tokenText = @"<missing EOF>"; |
| else |
| tokenText = [NSString stringWithFormat:@"<missing %@>\n",[[ANTLRBaseRecognizer getTokenNames] objectAtIndex:expectedTokenType]]; |
| ANTLRCommonToken *t = [[ANTLRCommonToken newToken:expectedTokenType Text:tokenText] retain]; |
| ANTLRCommonToken *current = [anInput LT:1]; |
| if ( current.type == ANTLRTokenTypeEOF ) { |
| current = [anInput LT:-1]; |
| } |
| t.line = current.line; |
| t.charPositionInLine = current.charPositionInLine; |
| t.channel = ANTLRTokenChannelDefault; |
| return t; |
| } |
| |
| /** Set the token stream and reset the parser */ |
| - (void) setTokenStream:(id<ANTLRTokenStream>)anInput |
| { |
| input = nil; |
| [self reset]; |
| input = anInput; |
| } |
| |
| - (id<ANTLRTokenStream>)getTokenStream |
| { |
| return input; |
| } |
| |
| - (NSString *)getSourceName |
| { |
| return [input getSourceName]; |
| } |
| |
| - (void) traceIn:(NSString *)ruleName Index:(int)ruleIndex |
| { |
| [super traceIn:ruleName Index:ruleIndex Object:[input LT:1]]; |
| } |
| |
| - (void) traceOut:(NSString *)ruleName Index:(NSInteger) ruleIndex |
| { |
| [super traceOut:ruleName Index:ruleIndex Object:[input LT:1]]; |
| } |
| |
| @end |