/** * @(#)CommandLine.java	1.10 03/01/23 * * Copyright 2003 Sun Microsystems, Inc. All rights reserved. * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. */package com.sun.tools.javac.v8;import java.io.IOException;import java.io.Reader;import java.io.FileReader;import java.io.BufferedReader;import java.io.StreamTokenizer;import com.sun.tools.javac.v8.util.ListBuffer;/** * Various utility methods for processing Java tool command line arguments. */public class CommandLine {    public CommandLine() {        super();    }    /**      * Process Win32-style command files for the specified command line      * arguments and return the resulting arguments. A command file argument      * is of the form '@file' where 'file' is the name of the file whose      * contents are to be parsed for additional arguments. The contents of      * the command file are parsed using StreamTokenizer and the original      * '@file' argument replaced with the resulting tokens. Recursive command      * files are not supported. The '@' character itself can be quoted with      * the sequence '@@'.      */    public static String[] parse(String[] args) throws IOException {        ListBuffer newArgs = new ListBuffer();        for (int i = 0; i < args.length; i++) {            String arg = args[i];            if (arg.length() > 1 && arg.charAt(0) == '@') {                arg = arg.substring(1);                if (arg.charAt(0) == '@') {                    newArgs.append(arg);                } else {                    loadCmdFile(arg, newArgs);                }            } else {                newArgs.append(arg);            }        }        return (String[]) newArgs.toList().toArray(new String[newArgs.length()]);    }    private static void loadCmdFile(String name, ListBuffer args) throws IOException {        Reader r = new BufferedReader(new FileReader(name));        StreamTokenizer st = new StreamTokenizer(r);        st.resetSyntax();        st.wordChars(' ', 255);        st.whitespaceChars(0, ' ');        st.commentChar('#');        st.quoteChar('\"');        st.quoteChar('\'');        while (st.nextToken() != st.TT_EOF) {            args.append(st.sval);        }        r.close();    }}