| // [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 "Foundation/NSObjCRuntime.h" |
| #import "RecognitionException.h" |
| #import "TokenStream.h" |
| #import "TreeNodeStream.h" |
| #import "BufferedTokenStream.h" |
| |
| @implementation RecognitionException |
| |
| @synthesize input; |
| @synthesize index; |
| @synthesize token; |
| @synthesize node; |
| @synthesize c; |
| @synthesize line; |
| @synthesize charPositionInLine; |
| @synthesize approximateLineInfo; |
| |
| + (id) newException |
| { |
| return [[RecognitionException alloc] init]; |
| } |
| |
| + (id) newException:(id<IntStream>) anInputStream |
| { |
| return [[RecognitionException alloc] initWithStream:anInputStream]; |
| } |
| |
| + (id) newException:(id<IntStream>) anInputStream reason:(NSString *)aReason |
| { |
| return [[RecognitionException alloc] initWithStream:anInputStream reason:aReason]; |
| } |
| |
| - (id) init |
| { |
| self = [super initWithName:@"Recognition Exception" reason:@"Recognition Exception" userInfo:nil]; |
| if ( self != nil ) { |
| } |
| return self; |
| } |
| |
| - (id) initWithStream:(id<IntStream>)anInputStream reason:(NSString *)aReason |
| { |
| self = [super initWithName:NSStringFromClass([self class]) reason:aReason userInfo:nil]; |
| if ( self != nil ) { |
| [self setStream:anInputStream]; |
| index = input.index; |
| |
| Class inputClass = [input class]; |
| if ([inputClass conformsToProtocol:@protocol(TokenStream)]) { |
| [self setToken:[(id<TokenStream>)input LT:1]]; |
| line = token.line; |
| charPositionInLine = token.charPositionInLine; |
| } else if ([inputClass conformsToProtocol:@protocol(CharStream)]) { |
| c = (unichar)[input LA:1]; |
| line = ((id<CharStream>)input).getLine; |
| charPositionInLine = ((id<CharStream>)input).getCharPositionInLine; |
| } else if ([inputClass conformsToProtocol:@protocol(TreeNodeStream)]) { |
| [self setNode:[(id<TreeNodeStream>)input LT:1]]; |
| line = [node line]; |
| charPositionInLine = [node charPositionInLine]; |
| } else { |
| c = (unichar)[input LA:1]; |
| } |
| } |
| return self; |
| } |
| |
| - (id) initWithStream:(id<IntStream>)anInputStream |
| { |
| self = [super initWithName:NSStringFromClass([self class]) reason:@"Runtime Exception" userInfo:nil]; |
| if ( self != nil ) { |
| self.input = anInputStream; |
| self.index = input.index; |
| if ( [anInputStream isKindOfClass:[BufferedTokenStream class]] ) { |
| self.token = [(id<TokenStream>)anInputStream LT:1]; |
| self.line = [token line]; |
| self.charPositionInLine = [token charPositionInLine]; |
| if ( [input conformsToProtocol:objc_getProtocol("TreeNodeStream")] ) { |
| [self extractInformationFromTreeNodeStream:anInputStream]; |
| } |
| else if ( [[anInputStream class] instancesRespondToSelector:@selector(LA1:)] ) { |
| c = [anInputStream LA:1]; |
| if ( [[anInputStream class] instancesRespondToSelector:@selector(getLine)] ) |
| line = [anInputStream getLine]; |
| if ( [[anInputStream class] instancesRespondToSelector:@selector(getCharPositionInLine)] ) |
| charPositionInLine = [anInputStream getCharPositionInLine]; |
| } |
| else { |
| c = [anInputStream LA:1]; |
| } |
| } |
| } |
| return self; |
| } |
| |
| - (id) initWithName:(NSString *)aName reason:(NSString *)aReason userInfo:(NSDictionary *)aUserInfo |
| { |
| self = [super initWithName:aName reason:aReason userInfo:aUserInfo]; |
| if ( self != nil ) { |
| } |
| return self; |
| } |
| |
| - (void) dealloc |
| { |
| #ifdef DEBUG_DEALLOC |
| NSLog( @"called dealloc in RecognitionException" ); |
| #endif |
| if ( input ) [input release]; |
| if ( token ) [token release]; |
| if ( node ) [node release]; |
| [super dealloc]; |
| } |
| |
| - (void) extractInformationFromTreeNodeStream:(id<TreeNodeStream>)anInput |
| { |
| id<TreeNodeStream> nodes = anInput; |
| node = [nodes LT:1]; |
| id<TreeAdaptor> adaptor = [nodes getTreeAdaptor]; |
| id<Token> payload = [adaptor getToken:node]; |
| if ( payload != nil ) { |
| token = payload; |
| if ( payload.line <= 0 ) { |
| // imaginary node; no line/pos info; scan backwards |
| int i = -1; |
| id priorNode = [nodes LT:i]; |
| while ( priorNode != nil ) { |
| id<Token> priorPayload = [adaptor getToken:priorNode]; |
| if ( priorPayload!=nil && priorPayload.line > 0 ) { |
| // we found the most recent real line / pos info |
| line = priorPayload.line; |
| charPositionInLine = priorPayload.charPositionInLine; |
| approximateLineInfo = YES; |
| break; |
| } |
| --i; |
| priorNode = [nodes LT:i]; |
| } |
| } |
| else { // node created from real token |
| line = payload.line; |
| charPositionInLine = payload.charPositionInLine; |
| } |
| } |
| else if ( [self.node isKindOfClass:[CommonTree class]] ) { |
| line = ((id<Tree>)node).line; |
| charPositionInLine = ((id<Tree>)node).charPositionInLine; |
| if ( [node isMemberOfClass:[CommonTree class]]) { |
| token = ((CommonTree *)node).token; |
| } |
| } |
| else { |
| NSInteger type = [adaptor getType:node]; |
| NSString *text = [adaptor getText:node]; |
| self.token = [CommonToken newToken:type Text:text]; |
| } |
| } |
| |
| - (NSInteger) unexpectedType |
| { |
| if (token) { |
| return token.type; |
| } else if (node) { |
| return [node type]; |
| } else { |
| return c; |
| } |
| } |
| |
| - (id<Token>)getUnexpectedToken |
| { |
| return token; |
| } |
| |
| - (NSString *) description |
| { |
| //NSMutableString *desc = [[NSMutableString alloc] initWithString:NSStringFromClass([self class])]; |
| NSMutableString *desc = [NSMutableString stringWithString:[self className]]; |
| if (token) { |
| [desc appendFormat:@" token:%@", token]; |
| } else if (node) { |
| [desc appendFormat:@" node:%@", node]; |
| } else { |
| [desc appendFormat:@" char:%c", c]; |
| } |
| [desc appendFormat:@" line:%d position:%d", line, charPositionInLine]; |
| return desc; |
| } |
| |
| //---------------------------------------------------------- |
| // input |
| //---------------------------------------------------------- |
| - (id<IntStream>) getStream |
| { |
| return input; |
| } |
| |
| - (void) setStream: (id<IntStream>) aStream |
| { |
| if ( input != aStream ) { |
| if ( input ) [input release]; |
| if ( aStream ) [aStream retain]; |
| input = aStream; |
| } |
| } |
| |
| //---------------------------------------------------------- |
| // token |
| //---------------------------------------------------------- |
| - (id<Token>) getToken |
| { |
| return token; |
| } |
| |
| - (void) setToken: (id<Token>) aToken |
| { |
| if (token != aToken) { |
| if ( token ) [token release]; |
| if ( aToken ) [aToken retain]; |
| token = aToken; |
| } |
| } |
| |
| //---------------------------------------------------------- |
| // node |
| //---------------------------------------------------------- |
| - (id<BaseTree>) getNode |
| { |
| return node; |
| } |
| |
| - (void) setNode: (id<BaseTree>) aNode |
| { |
| if (node != aNode) { |
| if ( node ) [node release]; |
| if ( aNode ) [aNode retain]; |
| node = aNode; |
| } |
| } |
| |
| - (NSString *)getMessage |
| { |
| return @"Fix getMessage in RecognitionException"; |
| } |
| |
| - (NSUInteger)charPositionInLine |
| { |
| return charPositionInLine; |
| } |
| |
| - (void)setCharPositionInLine:(NSUInteger)aPos |
| { |
| charPositionInLine = aPos; |
| } |
| |
| @end |