/***** BEGIN LICENSE BLOCK *****

* Version: EPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Eclipse Public
* License Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.eclipse.org/legal/epl-v20.html
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* Copyright (C) 2011 Koichiro Ohba <koichiro@meadowy.org>
*
* Alternatively, the contents of this file may be used under the terms of
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the LGPL are applicable instead
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***** END LICENSE BLOCK *****/

package org.jruby.ext.nkf;

public class CommandParser {

public Command parse(Options opt, String args) {
    Command cc = new Command();
    String[] tokens = args.split("\\s");
    for (int i = 0; i < tokens.length; i++) {
        // long option
        if (tokens[i].startsWith("--")) {
            String s = stripDash(tokens[i]);
            if (opt.hasLongOption(s)) {
                cc.addOption(opt.matchLongOption(s));
            }
        } else {
            // short option
            String s = stripDash(tokens[i]);
            int max = s.length();
            for (int j = 0; j < max; j++) {
                if (opt.hasShortOption(s)) {
                    Option cmd = opt.matchShortOption(s);
                    if (cmd.getValue() != null) {
                        int op_len = cmd.getValue().length();
                        s = s.substring(op_len);
                        j = j + op_len;
                    }
                    cc.addOption(cmd);
                }
                s = s.substring(1);
            }
        }
    }
    return cc;
}
private String stripDash(String s) {
    if (s.startsWith("--")) {
        return s.substring(2, s.length());
    } else if (s.startsWith("-")) {
        return s.substring(1, s.length());
    } else {
        return s;
    }
}

}