001 /*
002 * Copyright 2004 Sun Microsystems, Inc. All Rights Reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation. Sun designates this
008 * particular file as subject to the "Classpath" exception as provided
009 * by Sun in the LICENSE file that accompanied this code.
010 *
011 * This code is distributed in the hope that it will be useful, but WITHOUT
012 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
013 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
014 * version 2 for more details (a copy is included in the LICENSE file that
015 * accompanied this code).
016 *
017 * You should have received a copy of the GNU General Public License version
018 * 2 along with this work; if not, write to the Free Software Foundation,
019 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
020 *
021 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
022 * CA 95054 USA or visit www.sun.com if you need additional information or
023 * have any questions.
024 */
025
026 package com.sun.tools.apt.main;
027
028 import java.io.IOException;
029 import java.io.Reader;
030 import java.io.FileReader;
031 import java.io.BufferedReader;
032 import java.io.StreamTokenizer;
033 import com.sun.tools.javac.util.ListBuffer;
034
035 /**
036 * Various utility methods for processing Java tool command line arguments.
037 *
038 * <p><b>This is NOT part of any API supported by Sun Microsystems. If
039 * you write code that depends on this, you do so at your own risk.
040 * This code and its internal interfaces are subject to change or
041 * deletion without notice.</b>
042 */
043 public class CommandLine {
044 /**
045 * Process Win32-style command files for the specified command line
046 * arguments and return the resulting arguments. A command file argument
047 * is of the form '@file' where 'file' is the name of the file whose
048 * contents are to be parsed for additional arguments. The contents of
049 * the command file are parsed using StreamTokenizer and the original
050 * '@file' argument replaced with the resulting tokens. Recursive command
051 * files are not supported. The '@' character itself can be quoted with
052 * the sequence '@@'.
053 */
054 public static String[] parse(String[] args)
055 throws IOException
056 {
057 ListBuffer<String> newArgs = new ListBuffer<String>();
058 for (int i = 0; i < args.length; i++) {
059 String arg = args[i];
060 if (arg.length() > 1 && arg.charAt(0) == '@') {
061 arg = arg.substring(1);
062 if (arg.charAt(0) == '@') {
063 newArgs.append(arg);
064 } else {
065 loadCmdFile(arg, newArgs);
066 }
067 } else {
068 newArgs.append(arg);
069 }
070 }
071 return newArgs.toList().toArray(new String[newArgs.length()]);
072 }
073
074 private static void loadCmdFile(String name, ListBuffer<String> args)
075 throws IOException
076 {
077 Reader r = new BufferedReader(new FileReader(name));
078 StreamTokenizer st = new StreamTokenizer(r);
079 st.resetSyntax();
080 st.wordChars(' ', 255);
081 st.whitespaceChars(0, ' ');
082 st.commentChar('#');
083 st.quoteChar('"');
084 st.quoteChar('\'');
085 while (st.nextToken() != st.TT_EOF) {
086 args.append(st.sval);
087 }
088 r.close();
089 }
090 }