--- a/src/share/classes/com/sun/tools/javac/api/DiagnosticFormatter.java	Thu Aug 14 22:17:02 2008 -0700
+++ b/src/share/classes/com/sun/tools/javac/api/DiagnosticFormatter.java	Fri Aug 22 11:46:29 2008 +0100
@@ -73,9 +73,10 @@
      *
      * @param diag diagnostic to be formatted
      * @param l locale object to be used for i18n
+     * @param fullname whether the source fullname should be printed
      * @return string representation of the diagnostic source
      */
-    public String formatSource(D diag, Locale l);
+    public String formatSource(D diag, boolean fullname, Locale l);
 
     /**
      * Controls the way in which a diagnostic position is displayed.

--- a/src/share/classes/com/sun/tools/javac/util/AbstractDiagnosticFormatter.java	Thu Aug 14 22:17:02 2008 -0700
+++ b/src/share/classes/com/sun/tools/javac/util/AbstractDiagnosticFormatter.java	Fri Aug 22 11:46:29 2008 +0100
@@ -94,9 +94,9 @@
         }
     }
 
-    public String formatSource(JCDiagnostic d,Locale l) {
+    public String formatSource(JCDiagnostic d, boolean fullname, Locale l) {
         assert (d.getSource() != null);
-        return d.getSource().getName();
+        return fullname ? d.getSourceName() : d.getSource().getName();
     }
 
     /**

--- a/src/share/classes/com/sun/tools/javac/util/BasicDiagnosticFormatter.java	Thu Aug 14 22:17:02 2008 -0700
+++ b/src/share/classes/com/sun/tools/javac/util/BasicDiagnosticFormatter.java	Fri Aug 22 11:46:29 2008 +0100
@@ -108,11 +108,11 @@
     protected String formatMeta(char c, JCDiagnostic d, Locale l) {
         switch (c) {
             case 'b':
-                return formatSource(d, l);
+                return formatSource(d, false, l);
             case 'e':
                 return formatPosition(d, END, l);
             case 'f':
-                return formatSource(d, l);
+                return formatSource(d, true, l);
             case 'l':
                 return formatPosition(d, LINE, l);
             case 'c':

--- a/src/share/classes/com/sun/tools/javac/util/DiagnosticSource.java	Thu Aug 14 22:17:02 2008 -0700
+++ b/src/share/classes/com/sun/tools/javac/util/DiagnosticSource.java	Fri Aug 22 11:46:29 2008 +0100
@@ -81,7 +81,7 @@
      * for the current source file.  Zero is returned if no column exists
      * for the given position.
      */
-    public int getColumnNumber(int pos) {
+    public int getColumnNumber(int pos, boolean expandTabs) {
         try {
             if (findLine(pos)) {
                 int column = 0;
@@ -89,7 +89,7 @@
                     if (bp >= bufLen) {
                         return 0;
                     }
-                    if (buf[bp] == '\t') {
+                    if (buf[bp] == '\t' && expandTabs) {
                         column = (column / TabInc * TabInc) + TabInc;
                     } else {
                         column++;

--- a/src/share/classes/com/sun/tools/javac/util/JCDiagnostic.java	Thu Aug 14 22:17:02 2008 -0700
+++ b/src/share/classes/com/sun/tools/javac/util/JCDiagnostic.java	Fri Aug 22 11:46:29 2008 +0100
@@ -296,7 +296,7 @@
             line = column = -1;
         else {
             line = source.getLineNumber(n);
-            column = source.getColumnNumber(n);
+            column = source.getColumnNumber(n, true);
         }
     }
 

--- a/src/share/classes/com/sun/tools/javac/util/Log.java	Thu Aug 14 22:17:02 2008 -0700
+++ b/src/share/classes/com/sun/tools/javac/util/Log.java	Fri Aug 22 11:46:29 2008 +0100
@@ -244,7 +244,7 @@
         String line = (source == null ? null : source.getLine(pos));
         if (line == null)
             return;
-        int col = source.getColumnNumber(pos);
+        int col = source.getColumnNumber(pos, false);
 
         printLines(writer, line);
         for (int i = 0; i < col - 1; i++) {

--- a/src/share/classes/com/sun/tools/javac/util/RawDiagnosticFormatter.java	Thu Aug 14 22:17:02 2008 -0700
+++ b/src/share/classes/com/sun/tools/javac/util/RawDiagnosticFormatter.java	Fri Aug 22 11:46:29 2008 +0100
@@ -50,7 +50,7 @@
         try {
             StringBuffer buf = new StringBuffer();
             if (d.getPosition() != Position.NOPOS) {
-                buf.append(formatSource(d, null));
+                buf.append(formatSource(d, false, null));
                 buf.append(':');
                 buf.append(formatPosition(d, LINE, null));
                 buf.append(':');
@@ -70,12 +70,6 @@
     }
 
     @Override
-    public String formatSource(JCDiagnostic d,Locale l) {
-        assert(d.getSource() != null);
-        return d.getSource().getName();
-    }
-
-    @Override
     protected String formatArgument(JCDiagnostic diag, Object arg, Locale l) {
         String s;
         if (arg instanceof Formattable)

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/tools/javac/api/6733837/T6733837.java	Fri Aug 22 11:46:29 2008 +0100
@@ -0,0 +1,72 @@
+/*
+ * Copyright 2008 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/*
+ * @test
+ * @bug     6733837
+ * @summary Compiler API ignores locale settings
+ * @author  Maurizio Cimadamore
+ * @library ../lib
+ */
+
+import java.io.StringWriter;
+import java.io.PrintWriter;
+import java.net.URI;
+import java.util.Arrays;
+import java.util.List;
+import javax.tools.JavaFileObject;
+import javax.tools.SimpleJavaFileObject;
+import static javax.tools.JavaFileObject.Kind;
+import com.sun.source.util.JavacTask;
+
+public class T6733837 extends ToolTester {
+
+    public static void main(String... args) {
+        new T6733837().exec();
+    }
+
+    public void exec() {
+        JavaFileObject sfo = new SimpleJavaFileObject(URI.create(""),Kind.SOURCE) {
+            public CharSequence getCharContent(boolean ignoreEncodingErrors) {
+                return "\tclass ErroneousWithTab";
+            }
+            @Override
+            public String getName() {
+                return "RELATIVEPATH";
+            }
+        };
+        StringWriter sw = new StringWriter();
+        PrintWriter out = new PrintWriter(sw);
+        List<? extends JavaFileObject> files = Arrays.asList(sfo);
+        task = tool.getTask(sw, fm, null, null, null, files);
+        try {
+            ((JavacTask)task).analyze();
+        }
+        catch (Throwable t) {
+            throw new Error("Compiler threw an exception");
+        }
+        System.err.println(sw.toString());
+        if (sw.toString().contains("RELATIVEPATH"))
+            throw new Error("Bad source name in diagnostic");
+    }
+}