1 /*
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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  *
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17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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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 
main(String[] args)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 }
87