nescparser.g

plugin for eclipse

header {
package isis.anp.nesc;}

{
import isis.anp.common.CToken;
import isis.anp.common.CodeLocation;
import isis.anp.common.ParserMessage;
import isis.anp.common.TNode;
import isis.anp.nesc.common.NesCParserContext;

import java.util.ArrayList;

import antlr.ASTFactory;
import antlr.ASTPair;
import antlr.MismatchedTokenException;
import antlr.NoViableAltException;
import antlr.ParserSharedInputState;
import antlr.RecognitionException;
import antlr.SemanticException;
import antlr.Token;
import antlr.TokenBuffer;
import antlr.TokenStream;
import antlr.TokenStreamException;
import antlr.collections.AST;
import antlr.collections.impl.ASTArray;
import antlr.collections.impl.BitSet;
}
           
class NesCParser extends GnuCParser;

options
        {
        k = 2;
        exportVocab = NesC;
        buildAST = true;
        ASTLabelType = "TNode";

        // Copied following options from java grammar.
        codeGenMakeSwitchThreshold = 2;
        codeGenBitsetTestThreshold = 3;
        }


{
	// factor out parser state (symbol table, lists of parsed files, etc).
	private NesCParserContext parserContext = null;

	public NesCParser(TokenStream lexer, NesCParserContext ctx) {
		this(lexer,2);
		this.setParserContext(ctx);		
	}

	public void setParserContext(NesCParserContext ctx) {
		parserContext = ctx;
	}

	public NesCParserContext getParserContext() {
		return parserContext;
	}

	public String getFilename() {
		try {
			return LT(1).getFilename();
		} catch (TokenStreamException e) {
		}
		return null;
	}
  
    public boolean isTypedefName(String name) {
      boolean returnValue = false;
      TNode node = getParserContext().getSymbolTable().lookupNameInCurrentScope(name);
      for (; node != null; node = (TNode) node.getNextSibling() ) {
        if(node.getType() == LITERAL_typedef) {
            returnValue = true;
            break;
        }
      }
      return returnValue;
    }

    public String getAScopeName() {
      int cnt = getParserContext().getUnnamedScopeCounter();
      getParserContext().setUnnamedScopeCounter(cnt+1);
      return Integer.toString(cnt);
    }

    public void pushScope(String scopeName) {
      getParserContext().getSymbolTable().pushScope(scopeName);
    }

    public void popScope() {
      getParserContext().getSymbolTable().popScope();
    }
	
    int traceDepth = 0;
    public void reportError(RecognitionException ex) {
          if ( ex != null)   {
          		parserContext.addMsg(new ParserMessage(ParserMessage.ERROR, ex.getMessage(), new CodeLocation(ex.getFilename(), ex.getLine(), ex.getColumn()), ex));
          }
//      try {
//          System.err.println("ANTLR Parsing Error: "+ex + " token name:" + tokenNames[LA(1)]);
//          ex.printStackTrace(System.err);
//      }
//	  catch (TokenStreamException e) {
//          System.err.println("ANTLR Parsing Error: "+ex);
//          ex.printStackTrace(System.err);              
//      }
    }
    
    public void reportError(String s) {
       //System.err.println("ANTLR Parsing Error from String: " + s);
       parserContext.addMsg(new ParserMessage(ParserMessage.ERROR, s, null, null));
    }

    public void reportWarning(String s) {
       //System.err.println("ANTLR Parsing Warning from String: " + s);
       parserContext.addMsg(new ParserMessage(ParserMessage.WARNING, s, null, null));
    }

    public void match(int t) throws MismatchedTokenException {
      boolean debugging = false;
          
          if ( debugging ) {
           for (int x=0; x<traceDepth; x++) System.out.print(" ");
           try {
            System.out.println("Match("+tokenNames[t]+") with LA(1)="+
                tokenNames[LA(1)] + ((inputState.guessing>0)?" [inputState.guessing "+ inputState.guessing + "]":""));
           }
           catch (TokenStreamException e) {
            System.out.println("Match("+tokenNames[t]+") " + ((inputState.guessing>0)?" [inputState.guessing "+ inputState.guessing + "]":""));

           }
    
          }
          try {
            if ( LA(1)!=t ) {
                if ( debugging ){
                    for (int x=0; x<traceDepth; x++) System.out.print(" ");
                    System.out.println("token mismatch: "+tokenNames[LA(1)]
                                + "!="+tokenNames[t]);
                }
	        throw new MismatchedTokenException(tokenNames, LT(1), t, false, getFilename());

            } else {
                // mark token as consumed -- fetch next token deferred until LA/LT
                consume();
            }
          }
          catch (TokenStreamException e) {
          }
    
        }

    public void traceIn(String rname) {
          traceDepth += 1;
          for (int x=0; x<traceDepth; x++) System.out.print(" ");
          try {
            System.out.println("> "+rname+"; LA(1)==("+ tokenNames[LT(1).getType()] 
                + ") " + LT(1).getText() + " [inputState.guessing "+ inputState.guessing + "]");
          }
          catch (TokenStreamException e) {
          }
    }

    public void traceOut(String rname) {
          for (int x=0; x<traceDepth; x++) System.out.print(" ");
          try {
            System.out.println("< "+rname+"; LA(1)==("+ tokenNames[LT(1).getType()] 
                + ") "+LT(1).getText() + " [inputState.guessing "+ inputState.guessing + "]");
          }
          catch (TokenStreamException e) {
          }
          traceDepth -= 1;
    }

/*
	public AST parseIncludeFile(String fileName) throws FileNotFoundException, RecognitionException, TokenStreamException {
		AST ast = ast = (AST) getParserContext().getProcessedAST(fileName);
	
        if(ast == null) {
			// create parser
        	NesCParser parser = NesCParserFactory.create(fileName, getParserContext());
      	
        	// start parsing
        	parser.includeFile();
        	ast = parser.getAST();
        	
	        // add to hashmap containing processed include file names
	        getParserContext().addProcessedAST(fileName, ast);
        }
        return ast;        
	}

	public AST parseInterfaceFile(String fileName) throws FileNotFoundException, RecognitionException, TokenStreamException {
		AST ast = ast = (AST) getParserContext().getProcessedAST(fileName);
	
        if(ast == null) {
			// create parser
        	NesCParser parser = NesCParserFactory.create(fileName, getParserContext());
      	
        	// start parsing
        	parser.interfaceFile();
        	ast = parser.getAST();
        	
	        // add to hashmap containing processed include file names
	        getParserContext().addProcessedAST(fileName, ast);
        }
        return ast;        
	}
*/

	ArrayList currentFileASTStack = new ArrayList();
	public void pushCurrentFileAST(TNode root) {
		currentFileASTStack.add(0,root);
	}

	public TNode popCurrentFileAST() {
		return (TNode)currentFileASTStack.remove(0);
	}

	public TNode getCurrentFileAST() {
		return (TNode)currentFileASTStack.get(0);
	}

    
}
//******
// the translation unit is a NesC file
translationUnit
    :
    
    (
		    includeFile
		| 	
			( (includes)* "module") =>
			moduleFile
		| 
			( (includes)* "interface") =>	
			interfaceFile
		|
			( (includes)* "configuration") =>
			configurationFile
	)
	;

//******
// Include file
includeFile
    :
    (externalList)?
												{ ## = #( #[NIncludeFile], ## ); }
    ;


//******
// Interface file
interfaceFile
	:
    											{ 
													// create the NInterfaceFile node now, so that the ASTs
													// of the include files can be attached to it an attribute
													TNode newRoot = #[NInterfaceFile];
													ArrayList includeFileASTs = new ArrayList();
													newRoot.setAttribute("includeFileASTs", includeFileASTs);
													pushCurrentFileAST(newRoot);
/*
													// parse tos.h if it hasn't been parsed beforee
													String inputFileName = "tos.h";			
													if(!getParserContext().getProcessedIncludes().containsKey(inputFileName)) {
														try {
															// parse include file
															AST includeFileAST = parseIncludeFile(inputFileName);
												
															// add its AST to the includeFileASTs attribute of the nesC file from where 
															// this include was included
															includeFileASTs.add(includeFileAST);
															
														} catch (java.io.FileNotFoundException e) {
															// print File not found
															System.err.println("Include file not found: " + inputFileName);
												            e.printStackTrace(System.err);			
														}
													}														
*/													
											    }

   	(includes)*
   	
    interfaceDeclaration
    											{    												
													## = #( popCurrentFileAST(), ## );    												
//    												## = #( #[NInterfaceFile], ## ); 
												}
	;

includes
	: "includes"^
	includeFileNameList
	(SEMI!)+
                                                { ##.setType(NIncludes); }
	;

includeFileNameList
    :
    includeFileName
    ( COMMA! includeFileName )*
    ;

// catch file name of include file and parse it
includeFileName
    :
    i:ID
    {
		String inputFileName = i.getText()+".h";			
//		try {
			// parse include file
//			AST includeFileAST = parseIncludeFile(inputFileName);
			AST includeFileAST = null;

			ParserMessage container = new ParserMessage(ParserMessage.INFO, "Include file: "+inputFileName, new CodeLocation((CToken)i), null);
			getParserContext().addMsg(container);
			getParserContext().pushMessages(container);
			try {
				includeFileAST = getParserContext().getAST(inputFileName);
				// add its AST as an attribute to the file name ID node
				##.setAttribute("includeFileAST", includeFileAST);
	
				// add its AST to the includeFileASTs attribute of the nesC file from where 
				// this include was included
				TNode currentFileAST = getCurrentFileAST();
				ArrayList includeFileASTs = (ArrayList)currentFileAST.getAttribute("includeFileASTs");
				includeFileASTs.add(includeFileAST);				
			} catch(ParserMessage m) {
				getParserContext().addMsg(m);	
			} finally {
				getParserContext().popMessages();				
			}

			
			// ##.addSibling(parseIncludeFile(inputFileName));
//		} catch (java.io.FileNotFoundException e) {
			// print File not found
//			System.err.println("Include file not found: " + inputFileName);
//            e.printStackTrace(System.err);			
//		}
			
    }
                                                { ## = #( #[NIncludeFileName], ## ); }
    ;


interfaceDeclaration
	:
	"interface" i:ID 
	LCURLY^ declarationList RCURLY
												{ ##.setType(NInterface); }
	;

//******
// Configuration file
configurationFile
	:
												{
													// create the NConfigurationFile node now, so that the ASTs
													// of the include files can be attached to it an attribute
													TNode newRoot = #[NConfigurationFile];
													ArrayList includeFileASTs = new ArrayList();
													newRoot.setAttribute("includeFileASTs", includeFileASTs);
													pushCurrentFileAST(newRoot);
												}
	(includes)*