1 /*
   2  * Copyright (c) 1998, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /* @test
  25    @bug 4106810 4027740 4078997 4097738
  26    @summary Make sure StreamTokenizer will correctly
  27             parse different types of comments in input.
  28    */
  29 
  30 
  31 import java.io.*;
  32 
  33 public class Comment {
  34 
  35     public static void main(String[] args) throws Exception {
  36 
  37         File f = new File(System.getProperty("test.src", "."), "input.txt");
  38 
  39         int slashIsCommentStart = 1;
  40         int slashSlashComment = 2;
  41         int slashStarComment = 4;
  42 
  43         for (int i = 0; i < 8 ; i++) {
  44             FileReader reader = new FileReader(f);
  45             try {
  46                 StreamTokenizer st = new StreamTokenizer(reader);
  47 
  48                 /* decide the state of this run */
  49                 boolean slashCommentFlag = ((i & slashIsCommentStart) != 0);
  50                 boolean slashSlashCommentFlag = ((i & slashSlashComment) != 0);
  51                 boolean slashStarCommentFlag = ((i & slashStarComment) != 0);
  52 
  53                 /* set the initial state of the tokenizer */
  54                 if (!slashCommentFlag) {
  55                     st.ordinaryChar('/');
  56                 }
  57                 st.slashSlashComments(slashSlashCommentFlag);
  58                 st.slashStarComments(slashStarCommentFlag);
  59 
  60                 /* now go throgh the input file */
  61                 while(st.nextToken() != StreamTokenizer.TT_EOF)
  62                 {
  63                     String token = st.sval;
  64                     if (token == null) {
  65                         continue;
  66                     } else {
  67                         if ((token.compareTo("Error1") == 0) && slashStarCommentFlag) {
  68                             throw new Exception("Failed to pass one line C comments!");
  69                         }
  70                         if ((token.compareTo("Error2") == 0) && slashStarCommentFlag) {
  71                             throw new Exception("Failed to pass multi line C comments!");
  72                         }
  73                         if ((token.compareTo("Error3") == 0) && slashSlashCommentFlag) {
  74                             throw new Exception("Failed to pass C++ comments!");
  75                         }
  76                         if ((token.compareTo("Error4") == 0) && slashCommentFlag) {
  77                             throw new Exception("Failed to pass / comments!");
  78                         }
  79                     }
  80                 }
  81             } finally {
  82                 reader.close();
  83             }
  84         }
  85     }
  86 }