# HG changeset patch
# User kizune
# Date 1392131150 -14400
# Node ID 66245d9d84dbf6669deaf15ad7ffe0fa0fdcc2f5
# Parent  79dc4b992c0a385c1364592801781b747b85c6ca
8033581: Incorrect comment aligment
8033798: javap output has unnecessary trailing whitespace
8033726: StackMapTable does not unindent properly
Reviewed-by: ksrini

diff -r 79dc4b992c0a -r 66245d9d84db src/share/classes/com/sun/tools/javap/AttributeWriter.java
--- a/src/share/classes/com/sun/tools/javap/AttributeWriter.java	Thu Feb 06 21:11:27 2014 +0000
+++ b/src/share/classes/com/sun/tools/javap/AttributeWriter.java	Tue Feb 11 19:05:50 2014 +0400
@@ -619,6 +619,7 @@
             indent(+1);
             println("offset_delta = " + frame.offset_delta);
             printMap("locals", frame.locals);
+            indent(-1);
             return null;
         }
 
diff -r 79dc4b992c0a -r 66245d9d84db src/share/classes/com/sun/tools/javap/BasicWriter.java
--- a/src/share/classes/com/sun/tools/javap/BasicWriter.java	Thu Feb 06 21:11:27 2014 +0000
+++ b/src/share/classes/com/sun/tools/javap/BasicWriter.java	Tue Feb 11 19:05:50 2014 +0400
@@ -151,12 +151,22 @@
             for (int i = 0; i < s.length(); i++) {
                 char c = s.charAt(i);
                 switch (c) {
+                    case ' ':
+                        pendingSpaces++;
+                        break;
+
                     case '\n':
                         println();
                         break;
+
                     default:
                         if (buffer.length() == 0)
                             indent();
+                        if (pendingSpaces > 0) {
+                            for (int sp = 0; sp < pendingSpaces; sp++)
+                                buffer.append(' ');
+                            pendingSpaces = 0;
+                        }
                         buffer.append(c);
                 }
             }
@@ -164,6 +174,8 @@
         }
 
         protected void println() {
+            // ignore/discard pending spaces
+            pendingSpaces = 0;
             out.println(buffer);
             buffer.setLength(0);
         }
@@ -173,26 +185,21 @@
         }
 
         protected void tab() {
-            if (buffer.length() == 0)
-                indent();
-            space(indentCount * indentWidth + tabColumn - buffer.length());
+            int col = indentCount * indentWidth + tabColumn;
+            pendingSpaces += (col <= buffer.length() ? 1 : col - buffer.length());
         }
 
         private void indent() {
-            space(indentCount * indentWidth);
+            pendingSpaces += (indentCount * indentWidth);
         }
 
-        private void space(int n) {
-            for (int i = 0; i < n; i++)
-                buffer.append(' ');
-        }
-
-        private PrintWriter out;
-        private StringBuilder buffer;
+        private final PrintWriter out;
+        private final StringBuilder buffer;
         private int indentCount;
-        private int indentWidth;
-        private int tabColumn;
+        private final int indentWidth;
+        private final int tabColumn;
         private boolean pendingNewline;
+        private int pendingSpaces;
     }
 }
 
diff -r 79dc4b992c0a -r 66245d9d84db test/tools/javap/WhitespaceTest.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/tools/javap/WhitespaceTest.java	Tue Feb 11 19:05:50 2014 +0400
@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2014, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8033581 8033798 8033726
+ * @summary Check whitespace in generated output
+ */
+
+import java.io.*;
+import java.util.*;
+
+public class WhitespaceTest {
+    public static void main(String... args) throws Exception {
+        new WhitespaceTest().run();
+    }
+
+    void run() throws Exception {
+        test("-v", "java.lang.String");
+        test("-XDtab:1", "-v", "java.lang.String");
+
+        String testClasses = System.getProperty("test.classes");
+        for (int i = 10; i < 40; i++)
+            test("-XDtab:" + i, "-v", "-classpath", testClasses, "WhitespaceTest$HelloWorld");
+
+        if (errors > 0)
+            throw new Exception(errors + " errors found");
+    }
+
+    void test(String... args) throws Exception {
+        // need to avoid "//" appearing as a constant in the constant pool
+        String slash = "/";
+        String doubleSlash = slash + slash;
+        System.out.println("test: " + Arrays.asList(args));
+        String out = javap(args);
+        for (String line: out.split("[\r\n]+")) {
+            if (line.endsWith(" "))
+                error("line has trailing whitespace: " + line);
+            int comment = line.indexOf(doubleSlash);
+            if (comment > 0 && line.charAt(comment - 1) != ' ')
+                error("no space before comment: " + line);
+            if (line.matches(" +}"))
+                error("bad indentation: " + line);
+        }
+    }
+
+    String javap(String... args) throws Exception {
+        StringWriter sw = new StringWriter();
+        PrintWriter out = new PrintWriter(sw);
+        int rc = com.sun.tools.javap.Main.run(args, out);
+        out.close();
+        System.out.println(sw.toString());
+        if (rc < 0)
+            throw new Exception("javap exited, rc=" + rc);
+        return sw.toString();
+    }
+
+    void error(String msg) {
+        System.out.println("Error: " + msg);
+        errors++;
+    }
+
+    int errors;
+
+    // small class to test repeatedly with different tab values
+    static class HelloWorld {
+        public static void main(String... args) {
+            System.out.println("Hello World!");
+        }
+    }
+}