Source Code Cross Referenced for Log.java in  » 6.0-JDK-Modules-sun » javac-compiler » com » sun » tools » javac » util » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » 6.0 JDK Modules sun » javac compiler » com.sun.tools.javac.util 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright 1999-2006 Sun Microsystems, Inc.  All Rights Reserved.
003:         * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004:         *
005:         * This code is free software; you can redistribute it and/or modify it
006:         * under the terms of the GNU General Public License version 2 only, as
007:         * published by the Free Software Foundation.  Sun designates this
008:         * particular file as subject to the "Classpath" exception as provided
009:         * by Sun in the LICENSE file that accompanied this code.
010:         *
011:         * This code is distributed in the hope that it will be useful, but WITHOUT
012:         * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
013:         * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
014:         * version 2 for more details (a copy is included in the LICENSE file that
015:         * accompanied this code).
016:         *
017:         * You should have received a copy of the GNU General Public License version
018:         * 2 along with this work; if not, write to the Free Software Foundation,
019:         * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
020:         *
021:         * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
022:         * CA 95054 USA or visit www.sun.com if you need additional information or
023:         * have any questions.
024:         */
025:
026:        package com.sun.tools.javac.util;
027:
028:        import java.io.*;
029:        import java.nio.CharBuffer;
030:        import java.util.HashMap;
031:        import java.util.HashSet;
032:        import java.util.Map;
033:        import java.util.Set;
034:        import javax.tools.DiagnosticListener;
035:        import javax.tools.JavaFileObject;
036:        import com.sun.tools.javac.code.Source;
037:        import com.sun.tools.javac.tree.JCTree;
038:        import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition;
039:        import com.sun.tools.javac.util.JCDiagnostic.DiagnosticType;
040:        import com.sun.tools.javac.util.JCDiagnostic.SimpleDiagnosticPosition;
041:        import static com.sun.tools.javac.util.LayoutCharacters.*;
042:
043:        /** A class for error logs. Reports errors and warnings, and
044:         *  keeps track of error numbers and positions.
045:         *
046:         *  <p><b>This is NOT part of any API supported by Sun Microsystems.  If
047:         *  you write code that depends on this, you do so at your own risk.
048:         *  This code and its internal interfaces are subject to change or
049:         *  deletion without notice.</b>
050:         */
051:        @Version("@(#)Log.java	1.72 07/05/05")
052:        public class Log {
053:            /** The context key for the log. */
054:            public static final Context.Key<Log> logKey = new Context.Key<Log>();
055:
056:            /** The context key for the output PrintWriter. */
057:            public static final Context.Key<PrintWriter> outKey = new Context.Key<PrintWriter>();
058:
059:            //@Deprecated
060:            public final PrintWriter errWriter;
061:
062:            //@Deprecated
063:            public final PrintWriter warnWriter;
064:
065:            //@Deprecated
066:            public final PrintWriter noticeWriter;
067:
068:            /** The maximum number of errors/warnings that are reported.
069:             */
070:            public final int MaxErrors;
071:            public final int MaxWarnings;
072:
073:            /** Whether or not to display the line of source containing a diagnostic.
074:             */
075:            private final boolean showSourceLine;
076:
077:            /** Switch: prompt user on each error.
078:             */
079:            public boolean promptOnError;
080:
081:            /** Switch: emit warning messages.
082:             */
083:            public boolean emitWarnings;
084:
085:            /** Enforce mandatory warnings.
086:             */
087:            private boolean enforceMandatoryWarnings;
088:
089:            /** Print stack trace on errors?
090:             */
091:            public boolean dumpOnError;
092:
093:            /** Print multiple errors for same source locations.
094:             */
095:            public boolean multipleErrors;
096:
097:            /**
098:             * Diagnostic listener, if provided through programmatic
099:             * interface to javac (JSR 199).
100:             */
101:            protected DiagnosticListener<? super  JavaFileObject> diagListener;
102:            /**
103:             * Formatter for diagnostics
104:             */
105:            private DiagnosticFormatter diagFormatter;
106:
107:            /**
108:             * Factory for diagnostics
109:             */
110:            private JCDiagnostic.Factory diags;
111:
112:            /** Construct a log with given I/O redirections.
113:             */
114:            @Deprecated
115:            protected Log(Context context, PrintWriter errWriter,
116:                    PrintWriter warnWriter, PrintWriter noticeWriter) {
117:                context.put(logKey, this );
118:                this .errWriter = errWriter;
119:                this .warnWriter = warnWriter;
120:                this .noticeWriter = noticeWriter;
121:
122:                this .diags = JCDiagnostic.Factory.instance(context);
123:
124:                Options options = Options.instance(context);
125:                this .dumpOnError = options.get("-doe") != null;
126:                this .promptOnError = options.get("-prompt") != null;
127:                this .emitWarnings = options.get("-Xlint:none") == null;
128:                this .MaxErrors = getIntOption(options, "-Xmaxerrs", 100);
129:                this .MaxWarnings = getIntOption(options, "-Xmaxwarns", 100);
130:                this .showSourceLine = options.get("rawDiagnostics") == null;
131:
132:                this .diagFormatter = DiagnosticFormatter.instance(context);
133:                @SuppressWarnings("unchecked")
134:                // FIXME
135:                DiagnosticListener<? super  JavaFileObject> diagListener = context
136:                        .get(DiagnosticListener.class);
137:                this .diagListener = diagListener;
138:
139:                Source source = Source.instance(context);
140:                this .enforceMandatoryWarnings = source
141:                        .enforceMandatoryWarnings();
142:            }
143:
144:            // where
145:            private int getIntOption(Options options, String optionName,
146:                    int defaultValue) {
147:                String s = options.get(optionName);
148:                try {
149:                    if (s != null)
150:                        return Integer.parseInt(s);
151:                } catch (NumberFormatException e) {
152:                    // silently ignore ill-formed numbers
153:                }
154:                return defaultValue;
155:            }
156:
157:            /** The default writer for diagnostics
158:             */
159:            static final PrintWriter defaultWriter(Context context) {
160:                PrintWriter result = context.get(outKey);
161:                if (result == null)
162:                    context.put(outKey, result = new PrintWriter(System.err));
163:                return result;
164:            }
165:
166:            /** Construct a log with default settings.
167:             */
168:            protected Log(Context context) {
169:                this (context, defaultWriter(context));
170:            }
171:
172:            /** Construct a log with all output redirected.
173:             */
174:            protected Log(Context context, PrintWriter defaultWriter) {
175:                this (context, defaultWriter, defaultWriter, defaultWriter);
176:            }
177:
178:            /** Get the Log instance for this context. */
179:            public static Log instance(Context context) {
180:                Log instance = context.get(logKey);
181:                if (instance == null)
182:                    instance = new Log(context);
183:                return instance;
184:            }
185:
186:            /** The file that's currently translated.
187:             */
188:            protected JCDiagnostic.DiagnosticSource source;
189:
190:            /** The number of errors encountered so far.
191:             */
192:            public int nerrors = 0;
193:
194:            /** The number of warnings encountered so far.
195:             */
196:            public int nwarnings = 0;
197:
198:            /** A set of all errors generated so far. This is used to avoid printing an
199:             *  error message more than once. For each error, a pair consisting of the
200:             *  source file name and source code position of the error is added to the set.
201:             */
202:            private Set<Pair<JavaFileObject, Integer>> recorded = new HashSet<Pair<JavaFileObject, Integer>>();
203:
204:            private Map<JavaFileObject, Map<JCTree, Integer>> endPosTables;
205:
206:            /** The buffer containing the file that's currently translated.
207:             */
208:            private char[] buf = null;
209:
210:            /** The position in the buffer at which last error was reported
211:             */
212:            private int bp;
213:
214:            /** number of the current source line; first line is 1
215:             */
216:            private int line;
217:
218:            /**  buffer index of the first character of the current source line
219:             */
220:            private int lineStart;
221:
222:            public boolean hasDiagnosticListener() {
223:                return diagListener != null;
224:            }
225:
226:            public void setEndPosTable(JavaFileObject name,
227:                    Map<JCTree, Integer> table) {
228:                if (endPosTables == null)
229:                    endPosTables = new HashMap<JavaFileObject, Map<JCTree, Integer>>();
230:                endPosTables.put(name, table);
231:            }
232:
233:            /** Re-assign source, returning previous setting.
234:             */
235:            public JavaFileObject useSource(final JavaFileObject name) {
236:                JavaFileObject prev = currentSource();
237:                if (name != prev) {
238:                    source = new JCDiagnostic.DiagnosticSource() {
239:                        public JavaFileObject getFile() {
240:                            return name;
241:                        }
242:
243:                        public CharSequence getName() {
244:                            return JavacFileManager
245:                                    .getJavacBaseFileName(getFile());
246:                        }
247:
248:                        public int getLineNumber(int pos) {
249:                            return Log.this .getLineNumber(pos);
250:                        }
251:
252:                        public int getColumnNumber(int pos) {
253:                            return Log.this .getColumnNumber(pos);
254:                        }
255:
256:                        public Map<JCTree, Integer> getEndPosTable() {
257:                            return (endPosTables == null ? null : endPosTables
258:                                    .get(name));
259:                        }
260:                    };
261:                    buf = null;
262:                }
263:                return prev;
264:            }
265:
266:            /** Re-assign source buffer for existing source name.
267:             */
268:            protected void setBuf(char[] newBuf) {
269:                buf = newBuf;
270:                bp = 0;
271:                lineStart = 0;
272:                line = 1;
273:            }
274:
275:            protected char[] getBuf() {
276:                return buf;
277:            }
278:
279:            /** Return current source name.
280:             */
281:            public JavaFileObject currentSource() {
282:                return source == null ? null : source.getFile();
283:            }
284:
285:            /** Flush the logs
286:             */
287:            public void flush() {
288:                errWriter.flush();
289:                warnWriter.flush();
290:                noticeWriter.flush();
291:            }
292:
293:            /** Returns true if an error needs to be reported for a given
294:             * source name and pos.
295:             */
296:            protected boolean shouldReport(JavaFileObject file, int pos) {
297:                if (multipleErrors || file == null)
298:                    return true;
299:
300:                Pair<JavaFileObject, Integer> coords = new Pair<JavaFileObject, Integer>(
301:                        file, pos);
302:                boolean shouldReport = !recorded.contains(coords);
303:                if (shouldReport)
304:                    recorded.add(coords);
305:                return shouldReport;
306:            }
307:
308:            /** Prompt user after an error.
309:             */
310:            public void prompt() {
311:                if (promptOnError) {
312:                    System.err.println(getLocalizedString("resume.abort"));
313:                    char ch;
314:                    try {
315:                        while (true) {
316:                            switch (System.in.read()) {
317:                            case 'a':
318:                            case 'A':
319:                                System.exit(-1);
320:                                return;
321:                            case 'r':
322:                            case 'R':
323:                                return;
324:                            case 'x':
325:                            case 'X':
326:                                throw new AssertionError("user abort");
327:                            default:
328:                            }
329:                        }
330:                    } catch (IOException e) {
331:                    }
332:                }
333:            }
334:
335:            /** Print the faulty source code line and point to the error.
336:             *  @param pos   Buffer index of the error position, must be on current line
337:             */
338:            private void printErrLine(int pos, PrintWriter writer) {
339:                if (!findLine(pos))
340:                    return;
341:
342:                int lineEnd = lineStart;
343:                while (lineEnd < buf.length && buf[lineEnd] != CR
344:                        && buf[lineEnd] != LF)
345:                    lineEnd++;
346:                if (lineEnd - lineStart == 0)
347:                    return;
348:                printLines(writer, new String(buf, lineStart, lineEnd
349:                        - lineStart));
350:                for (bp = lineStart; bp < pos; bp++) {
351:                    writer.print((buf[bp] == '\t') ? "\t" : " ");
352:                }
353:                writer.println("^");
354:                writer.flush();
355:            }
356:
357:            protected static char[] getCharContent(JavaFileObject fileObject)
358:                    throws IOException {
359:                CharSequence cs = fileObject.getCharContent(true);
360:                if (cs instanceof  CharBuffer) {
361:                    return JavacFileManager.toArray((CharBuffer) cs);
362:                } else {
363:                    return cs.toString().toCharArray();
364:                }
365:            }
366:
367:            /** Find the line in the buffer that contains the current position
368:             * @param pos      Character offset into the buffer
369:             */
370:            private boolean findLine(int pos) {
371:                if (pos == Position.NOPOS || currentSource() == null)
372:                    return false;
373:                try {
374:                    if (buf == null) {
375:                        buf = getCharContent(currentSource());
376:                        lineStart = 0;
377:                        line = 1;
378:                    } else if (lineStart > pos) { // messages don't come in order
379:                        lineStart = 0;
380:                        line = 1;
381:                    }
382:                    bp = lineStart;
383:                    while (bp < buf.length && bp < pos) {
384:                        switch (buf[bp++]) {
385:                        case CR:
386:                            if (bp < buf.length && buf[bp] == LF)
387:                                bp++;
388:                            line++;
389:                            lineStart = bp;
390:                            break;
391:                        case LF:
392:                            line++;
393:                            lineStart = bp;
394:                            break;
395:                        }
396:                    }
397:                    return bp <= buf.length;
398:                } catch (IOException e) {
399:                    //e.printStackTrace();
400:                    // FIXME: include e.getLocalizedMessage() in error message
401:                    printLines(errWriter,
402:                            getLocalizedString("source.unavailable"));
403:                    errWriter.flush();
404:                    buf = new char[0];
405:                }
406:                return false;
407:            }
408:
409:            /** Print the text of a message, translating newlines appropriately
410:             *  for the platform.
411:             */
412:            public static void printLines(PrintWriter writer, String msg) {
413:                int nl;
414:                while ((nl = msg.indexOf('\n')) != -1) {
415:                    writer.println(msg.substring(0, nl));
416:                    msg = msg.substring(nl + 1);
417:                }
418:                if (msg.length() != 0)
419:                    writer.println(msg);
420:            }
421:
422:            /** Report an error, unless another error was already reported at same
423:             *  source position.
424:             *  @param key    The key for the localized error message.
425:             *  @param args   Fields of the error message.
426:             */
427:            public void error(String key, Object... args) {
428:                report(diags.error(source, null, key, args));
429:            }
430:
431:            /** Report an error, unless another error was already reported at same
432:             *  source position.
433:             *  @param pos    The source position at which to report the error.
434:             *  @param key    The key for the localized error message.
435:             *  @param args   Fields of the error message.
436:             */
437:            public void error(DiagnosticPosition pos, String key,
438:                    Object... args) {
439:                report(diags.error(source, pos, key, args));
440:            }
441:
442:            /** Report an error, unless another error was already reported at same
443:             *  source position.
444:             *  @param pos    The source position at which to report the error.
445:             *  @param key    The key for the localized error message.
446:             *  @param args   Fields of the error message.
447:             */
448:            public void error(int pos, String key, Object... args) {
449:                report(diags.error(source, wrap(pos), key, args));
450:            }
451:
452:            /** Report a warning, unless suppressed by the  -nowarn option or the
453:             *  maximum number of warnings has been reached.
454:             *  @param pos    The source position at which to report the warning.
455:             *  @param key    The key for the localized warning message.
456:             *  @param args   Fields of the warning message.
457:             */
458:            public void warning(String key, Object... args) {
459:                report(diags.warning(source, null, key, args));
460:            }
461:
462:            /** Report a warning, unless suppressed by the  -nowarn option or the
463:             *  maximum number of warnings has been reached.
464:             *  @param pos    The source position at which to report the warning.
465:             *  @param key    The key for the localized warning message.
466:             *  @param args   Fields of the warning message.
467:             */
468:            public void warning(DiagnosticPosition pos, String key,
469:                    Object... args) {
470:                report(diags.warning(source, pos, key, args));
471:            }
472:
473:            /** Report a warning, unless suppressed by the  -nowarn option or the
474:             *  maximum number of warnings has been reached.
475:             *  @param pos    The source position at which to report the warning.
476:             *  @param key    The key for the localized warning message.
477:             *  @param args   Fields of the warning message.
478:             */
479:            public void warning(int pos, String key, Object... args) {
480:                report(diags.warning(source, wrap(pos), key, args));
481:            }
482:
483:            /** Report a warning.
484:             *  @param pos    The source position at which to report the warning.
485:             *  @param key    The key for the localized warning message.
486:             *  @param args   Fields of the warning message.
487:             */
488:            public void mandatoryWarning(DiagnosticPosition pos, String key,
489:                    Object... args) {
490:                if (enforceMandatoryWarnings)
491:                    report(diags.mandatoryWarning(source, pos, key, args));
492:                else
493:                    report(diags.warning(source, pos, key, args));
494:            }
495:
496:            /** Report a warning that cannot be suppressed.
497:             *  @param pos    The source position at which to report the warning.
498:             *  @param key    The key for the localized warning message.
499:             *  @param args   Fields of the warning message.
500:             */
501:            public void strictWarning(DiagnosticPosition pos, String key,
502:                    Object... args) {
503:                writeDiagnostic(diags.warning(source, pos, key, args));
504:                nwarnings++;
505:            }
506:
507:            /** Provide a non-fatal notification, unless suppressed by the -nowarn option.
508:             *  @param key    The key for the localized notification message.
509:             *  @param args   Fields of the notification message.
510:             */
511:            public void note(String key, Object... args) {
512:                report(diags.note(source, null, key, args));
513:            }
514:
515:            /** Provide a non-fatal notification, unless suppressed by the -nowarn option.
516:             *  @param key    The key for the localized notification message.
517:             *  @param args   Fields of the notification message.
518:             */
519:            public void note(DiagnosticPosition pos, String key, Object... args) {
520:                report(diags.note(source, pos, key, args));
521:            }
522:
523:            /** Provide a non-fatal notification, unless suppressed by the -nowarn option.
524:             *  @param key    The key for the localized notification message.
525:             *  @param args   Fields of the notification message.
526:             */
527:            public void note(int pos, String key, Object... args) {
528:                report(diags.note(source, wrap(pos), key, args));
529:            }
530:
531:            /** Provide a non-fatal notification, unless suppressed by the -nowarn option.
532:             *  @param key    The key for the localized notification message.
533:             *  @param args   Fields of the notification message.
534:             */
535:            public void mandatoryNote(final JavaFileObject file, String key,
536:                    Object... args) {
537:                JCDiagnostic.DiagnosticSource wrapper = null;
538:                if (file != null) {
539:                    wrapper = new JCDiagnostic.DiagnosticSource() {
540:                        public JavaFileObject getFile() {
541:                            return file;
542:                        }
543:
544:                        public CharSequence getName() {
545:                            return JavacFileManager
546:                                    .getJavacBaseFileName(getFile());
547:                        }
548:
549:                        public int getLineNumber(int pos) {
550:                            return Log.this .getLineNumber(pos);
551:                        }
552:
553:                        public int getColumnNumber(int pos) {
554:                            return Log.this .getColumnNumber(pos);
555:                        }
556:
557:                        public Map<JCTree, Integer> getEndPosTable() {
558:                            return (endPosTables == null ? null : endPosTables
559:                                    .get(file));
560:                        }
561:                    };
562:                }
563:                if (enforceMandatoryWarnings)
564:                    report(diags.mandatoryNote(wrapper, key, args));
565:                else
566:                    report(diags.note(wrapper, null, key, args));
567:            }
568:
569:            private DiagnosticPosition wrap(int pos) {
570:                return (pos == Position.NOPOS ? null
571:                        : new SimpleDiagnosticPosition(pos));
572:            }
573:
574:            /**
575:             * Common diagnostic handling.
576:             * The diagnostic is counted, and depending on the options and how many diagnostics have been
577:             * reported so far, the diagnostic may be handed off to writeDiagnostic.
578:             */
579:            public void report(JCDiagnostic diagnostic) {
580:                switch (diagnostic.getType()) {
581:                case FRAGMENT:
582:                    throw new IllegalArgumentException();
583:
584:                case NOTE:
585:                    // Print out notes only when we are permitted to report warnings
586:                    // Notes are only generated at the end of a compilation, so should be small
587:                    // in number.
588:                    if (emitWarnings || diagnostic.isMandatory()) {
589:                        writeDiagnostic(diagnostic);
590:                    }
591:                    break;
592:
593:                case WARNING:
594:                    if (emitWarnings || diagnostic.isMandatory()) {
595:                        if (nwarnings < MaxWarnings) {
596:                            writeDiagnostic(diagnostic);
597:                            nwarnings++;
598:                        }
599:                    }
600:                    break;
601:
602:                case ERROR:
603:                    if (nerrors < MaxErrors
604:                            && shouldReport(diagnostic.getSource(), diagnostic
605:                                    .getIntPosition())) {
606:                        writeDiagnostic(diagnostic);
607:                        nerrors++;
608:                    }
609:                    break;
610:                }
611:            }
612:
613:            /**
614:             * Write out a diagnostic.
615:             */
616:            protected void writeDiagnostic(JCDiagnostic diag) {
617:                if (diagListener != null) {
618:                    try {
619:                        diagListener.report(diag);
620:                        return;
621:                    } catch (Throwable t) {
622:                        throw new ClientCodeException(t);
623:                    }
624:                }
625:
626:                PrintWriter writer = getWriterForDiagnosticType(diag.getType());
627:
628:                printLines(writer, diagFormatter.format(diag));
629:                if (showSourceLine) {
630:                    int pos = diag.getIntPosition();
631:                    if (pos != Position.NOPOS) {
632:                        JavaFileObject prev = useSource(diag.getSource());
633:                        printErrLine(pos, writer);
634:                        useSource(prev);
635:                    }
636:                }
637:
638:                if (promptOnError) {
639:                    switch (diag.getType()) {
640:                    case ERROR:
641:                    case WARNING:
642:                        prompt();
643:                    }
644:                }
645:
646:                if (dumpOnError)
647:                    new RuntimeException().printStackTrace(writer);
648:
649:                writer.flush();
650:            }
651:
652:            @Deprecated
653:            protected PrintWriter getWriterForDiagnosticType(DiagnosticType dt) {
654:                switch (dt) {
655:                case FRAGMENT:
656:                    throw new IllegalArgumentException();
657:
658:                case NOTE:
659:                    return noticeWriter;
660:
661:                case WARNING:
662:                    return warnWriter;
663:
664:                case ERROR:
665:                    return errWriter;
666:
667:                default:
668:                    throw new Error();
669:                }
670:            }
671:
672:            /** Find a localized string in the resource bundle.
673:             *  @param key    The key for the localized string.
674:             *  @param args   Fields to substitute into the string.
675:             */
676:            public static String getLocalizedString(String key, Object... args) {
677:                return Messages.getDefaultLocalizedString("compiler.misc."
678:                        + key, args);
679:            }
680:
681:            /***************************************************************************
682:             * raw error messages without internationalization; used for experimentation
683:             * and quick prototyping
684:             ***************************************************************************/
685:
686:            /** print an error or warning message:
687:             */
688:            private void printRawError(int pos, String msg) {
689:                if (!findLine(pos)) {
690:                    printLines(errWriter, "error: " + msg);
691:                } else {
692:                    JavaFileObject file = currentSource();
693:                    if (file != null)
694:                        printLines(errWriter, JavacFileManager
695:                                .getJavacFileName(file)
696:                                + ":" + line + ": " + msg);
697:                    printErrLine(pos, errWriter);
698:                }
699:                errWriter.flush();
700:            }
701:
702:            /** report an error:
703:             */
704:            public void rawError(int pos, String msg) {
705:                if (nerrors < MaxErrors && shouldReport(currentSource(), pos)) {
706:                    printRawError(pos, msg);
707:                    prompt();
708:                    nerrors++;
709:                }
710:                errWriter.flush();
711:            }
712:
713:            /** report a warning:
714:             */
715:            public void rawWarning(int pos, String msg) {
716:                if (nwarnings < MaxWarnings && emitWarnings) {
717:                    printRawError(pos, "warning: " + msg);
718:                }
719:                prompt();
720:                nwarnings++;
721:                errWriter.flush();
722:            }
723:
724:            /** Return the one-based line number associated with a given pos 
725:             * for the current source file.  Zero is returned if no line exists 
726:             * for the given position.
727:             */
728:            protected int getLineNumber(int pos) {
729:                if (findLine(pos))
730:                    return line;
731:                return 0;
732:            }
733:
734:            /** Return the one-based column number associated with a given pos 
735:             * for the current source file.  Zero is returned if no column exists 
736:             * for the given position.
737:             */
738:            protected int getColumnNumber(int pos) {
739:                if (findLine(pos)) {
740:                    int column = 0;
741:                    for (bp = lineStart; bp < pos; bp++) {
742:                        if (bp >= buf.length)
743:                            return 0;
744:                        if (buf[bp] == '\t')
745:                            column = (column / TabInc * TabInc) + TabInc;
746:                        else
747:                            column++;
748:                    }
749:                    return column + 1; // positions are one-based
750:                }
751:                return 0;
752:            }
753:
754:            public static String format(String fmt, Object... args) {
755:                return String.format((java.util.Locale) null, fmt, args);
756:            }
757:
758:        }
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