Examples with PreprocessorDirective org.eclipse.titan.designer.parsers.preprocess.PreprocessorDirective used on opensource projects

Example 1 with PreprocessorDirective

use of org.eclipse.titan.designer.parsers.preprocess.PreprocessorDirective in project titan.EclipsePlug-ins by eclipse.

the class PreprocessedTokenStream method fetch.

@Override
public int fetch(int n) {
    if (fetchedEOF) {
        return 0;
    }
    int i = 0;
    do {
        Token t;
        if (tokenStreamStack.isEmpty()) {
            t = getTokenSource().nextToken();
        } else {
            t = tokenStreamStack.peek().getTokenSource().nextToken();
        }
        if (t == null) {
            return 0;
        }
        int tokenType = t.getType();
        if (tokenType == Ttcn3Lexer.PREPROCESSOR_DIRECTIVE) {
            lastPPDirectiveLocation = new Location(actualFile, t.getLine(), t.getStartIndex(), t.getStopIndex() + 1);
            // 1. the first # shall be discarded
            // 2. "\\\n" strings are removed, so multiline tokens, which are split by backslash are extracted to one line
            final String text = t.getText().substring(1).replace("\\\n", "");
            Reader reader = new StringReader(text);
            CharStream charStream = new UnbufferedCharStream(reader);
            PreprocessorDirectiveLexer lexer = new PreprocessorDirectiveLexer(charStream);
            lexer.setTokenFactory(new PPDirectiveTokenFactory(true, t));
            lexerListener = new PPListener();
            lexer.removeErrorListeners();
            lexer.addErrorListener(lexerListener);
            lexer.setLine(t.getLine());
            lexer.setCharPositionInLine(t.getCharPositionInLine());
            // 1. Previously it was UnbufferedTokenStream(lexer), but it was changed to BufferedTokenStream, because UnbufferedTokenStream seems to be unusable. It is an ANTLR 4 bug.
            // Read this: https://groups.google.com/forum/#!topic/antlr-discussion/gsAu-6d3pKU
            // pr_PatternChunk[StringBuilder builder, boolean[] uni]:
            // $builder.append($v.text); <-- exception is thrown here: java.lang.UnsupportedOperationException: interval 85..85 not in token buffer window: 86..341
            // 2. Changed from BufferedTokenStream to CommonTokenStream, otherwise tokens with "-> channel(HIDDEN)" are not filtered out in lexer.
            final CommonTokenStream tokenStream = new CommonTokenStream(lexer);
            PreprocessorDirectiveParser localParser = new PreprocessorDirectiveParser(tokenStream);
            localParser.setBuildParseTree(false);
            parserListener = new PPListener(localParser);
            localParser.removeErrorListeners();
            localParser.addErrorListener(parserListener);
            localParser.setIsActiveCode(condStateStack.isPassing());
            localParser.setMacros(macros);
            localParser.setLine(t.getLine());
            PreprocessorDirective ppDirective = null;
            ppDirective = localParser.pr_Directive().ppDirective;
            errorsStored.addAll(localParser.getErrorStorage());
            warnings.addAll(localParser.getWarnings());
            unsupportedConstructs.addAll(localParser.getUnsupportedConstructs());
            if (ppDirective != null) {
                ppDirective.line = t.getLine();
                if (ppDirective.isConditional()) {
                    boolean preIsPassing = condStateStack.isPassing();
                    condStateStack.processDirective(ppDirective);
                    boolean postIsPassing = condStateStack.isPassing();
                    if (preIsPassing != postIsPassing && tokenStreamStack.isEmpty() && getTokenSource() instanceof Ttcn3Lexer) {
                        // included files are ignored because of ambiguity
                        Location ppLocation = lastPPDirectiveLocation;
                        if (ppLocation != null) {
                            if (preIsPassing) {
                                // switched to inactive: begin a new inactive location
                                Location loc = new Location(actualFile, ppLocation.getLine(), ppLocation.getEndOffset(), ppLocation.getEndOffset());
                                inactiveCodeLocations.add(loc);
                            } else {
                                // switched to active: end the current inactive location
                                int iclSize = inactiveCodeLocations.size();
                                if (iclSize > 0) {
                                    Location lastLocation = inactiveCodeLocations.get(iclSize - 1);
                                    lastLocation.setEndOffset(ppLocation.getOffset());
                                }
                            }
                        }
                    }
                } else {
                    // other directive types
                    if (condStateStack.isPassing()) {
                        // directive
                        switch(ppDirective.type) {
                            case INCLUDE:
                                {
                                    if (tokenStreamStack.size() > RECURSION_LIMIT) {
                                        // dumb but safe defense against infinite recursion, default value from gcc
                                        TITANMarker marker = new TITANMarker("Maximum #include recursion depth reached", ppDirective.line, -1, -1, IMarker.SEVERITY_ERROR, IMarker.PRIORITY_NORMAL);
                                        unsupportedConstructs.add(marker);
                                    } else {
                                        // TODO: Makes the Eclipse slow down
                                        processIncludeDirective(ppDirective);
                                    }
                                }
                                break;
                            case ERROR:
                                {
                                    String errorMessage = ppDirective.str == null ? "" : ppDirective.str;
                                    TITANMarker marker = new TITANMarker(errorMessage, ppDirective.line, -1, -1, IMarker.SEVERITY_ERROR, IMarker.PRIORITY_NORMAL);
                                    unsupportedConstructs.add(marker);
                                }
                                break;
                            case WARNING:
                                {
                                    String warningMessage = ppDirective.str == null ? "" : ppDirective.str;
                                    TITANMarker marker = new TITANMarker(warningMessage, ppDirective.line, -1, -1, IMarker.SEVERITY_WARNING, IMarker.PRIORITY_NORMAL);
                                    warnings.add(marker);
                                }
                                break;
                            case LINECONTROL:
                            case LINEMARKER:
                            case PRAGMA:
                            case NULL:
                                {
                                    String reportPreference = Platform.getPreferencesService().getString(ProductConstants.PRODUCT_ID_DESIGNER, PreferenceConstants.REPORT_IGNORED_PREPROCESSOR_DIRECTIVES, GeneralConstants.WARNING, null);
                                    if (!GeneralConstants.IGNORE.equals(reportPreference)) {
                                        boolean isError = GeneralConstants.ERROR.equals(reportPreference);
                                        TITANMarker marker = new TITANMarker(MessageFormat.format("Preprocessor directive {0} is ignored", ppDirective.type.getName()), ppDirective.line, -1, -1, isError ? IMarker.SEVERITY_ERROR : IMarker.SEVERITY_WARNING, IMarker.PRIORITY_NORMAL);
                                        if (isError) {
                                            unsupportedConstructs.add(marker);
                                        } else {
                                            warnings.add(marker);
                                        }
                                    }
                                }
                                break;
                            default:
                        }
                    }
                }
            }
        } else if (tokenType == Token.EOF) {
            if (!tokenStreamStack.isEmpty()) {
                // the included file ended, drop lexer
                // from the stack and ignore EOF token
                TokenStreamData tsd = tokenStreamStack.pop();
                if (parser != null) {
                    if (tokenStreamStack.isEmpty()) {
                        parser.setActualFile(actualFile);
                    } else {
                        parser.setActualFile(tokenStreamStack.peek().file);
                    }
                }
                if (tsd.reader != null) {
                    try {
                        tsd.reader.close();
                    } catch (IOException e) {
                    }
                }
            } else {
                fetchedEOF = true;
                condStateStack.eofCheck();
                tokens.add(t);
                ((CommonToken) t).setTokenIndex(tokens.size() - 1);
                --n;
                ++i;
                if (n == 0) {
                    return i;
                }
            }
        } else {
            if (condStateStack.isPassing()) {
                tokens.add(t);
                ((CommonToken) t).setTokenIndex(tokens.size() - 1);
                --n;
                ++i;
                if (n == 0) {
                    return i;
                }
            }
        }
    } while (true);
}