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Java > Open Source Codes > jbet > cmd > help


1 /*
2  * JBET - Java Binary Enhancement Tool
3  * Copyright (c) 2003 Networks Associates Technology, Inc.
4  *
5  * This software was developed under DARPA/SPAWAR contract
6  * N66001-00-C-8602 "SPMA" as part of the
7  * DARPA OASIS research program.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  * 1. Redistributions of source code must retain the above copyright
13  * notice, this list of conditions and the following disclaimer.
14  * 2. Redistributions in binary form must reproduce the above copyright
15  * notice, this list of conditions and the following disclaimer in the
16  * documentation and/or other materials provided with the distribution.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28  * SUCH DAMAGE.
29  */
30
31 /*
32    Command object called by Jbet.doCommands().
33    run() parses the input using the supplied lexer.
34 */
35
36 package jbet.cmd;
37 import jbet.*;
38
39 public class help implements Command
40 {
41     public int helplevel() { return 5; }
42     public String JavaDoc shorthelp() { return "help on commands or syntax"; }
43     public String JavaDoc longhelp() {
44     return
45         "jbet help : display a list of commands\n" +
46         "jbet help <command> : display help on <command>\n"; }
47
48     /* if there is a name, print the long help for that command; otherwise
49        print the list of commands */
50     public void run (Lexer lexer) throws Exception JavaDoc
51     {
52     lexer.match (Token.END_OF_OPTS);
53     Token tok = lexer.peek ();
54
55     if (tok.type == Token.NAME) {
56         lexer.match (Token.NAME);
57
58         Main.usage (tok.text);
59     }
60     else if (tok.type == Token.INT) {
61         lexer.match (Token.INT);
62         Main.usage ((int)tok.l);
63     }
64     else
65         Main.usage();
66     }
67 }
68
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