/*

 * $Id$

 *

 * Copyright (C) 2003-2009 JNode.org

 *

 * This library is free software; you can redistribute it and/or modify it

 * under the terms of the GNU Lesser General Public License as published

 * by the Free Software Foundation; either version 2.1 of the License, or

 * (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful, but 

 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY

 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 

 * License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public License

 * along with this library; If not, write to the Free Software Foundation, Inc., 

 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

 */

package org.jnode.vm;

import java.util.StringTokenizer;

public abstract class VmSystemObject implements BootableObject {

    /**

     * Mangle an identifier into a ASCII C name

     *

     * @param s

     * @return String

     */

    public static String mangle(String s) {

        final char[] src = s.toCharArray();

        final int cnt = s.length();

        final StringBuilder res = new StringBuilder(cnt);

        for (int i = 0; i < cnt; i++) {

            final char ch = src[i];

            if (((ch >= 'a') && (ch <= 'z'))

                || ((ch >= 'A') && (ch <= 'Z'))

                || ((ch >= '0') && (ch <= '9'))) {

                res.append(ch);

            } else {

                res.append(Integer.toHexString(ch));

            }

        }

        return InternString.internString(res.toString());

    }

    /**

     * Mangle a classname into a ASCII C name

     *

     * @param s

     * @return String

     */

    public static String mangleClassName(String s) {

        s = s.replace('/', '.');

        final StringTokenizer tok = new StringTokenizer(s, ".");

        final StringBuilder res = new StringBuilder(32);

        int q = tok.countTokens();

        res.append('Q');

        res.append(q);

        while (tok.hasMoreTokens()) {

            String v = tok.nextToken();

            res.append(v.length());

            res.append(v);

        }

        return InternString.internString(res.toString());

    }

    /**

     * Verify this object, just before it is written to the boot image during

     * the build process.

     */

    public void verifyBeforeEmit() {

    }

    /**

     * This method is called in the build process to get extra information

     * on this object. This extra information is added to the listing file.

     *

     * @return String

     */

    public String getExtraInfo() {

        return null;

    }

}