FilterCodecUtils.java

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/*
 * Gridarta MMORPG map editor for Crossfire, Daimonin and similar games.
 * Copyright (C) 2000-2023 The Gridarta Developers.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
 
package net.sf.gridarta.model.filter;
 
import org.jetbrains.annotations.NotNull;
 
public class FilterCodecUtils {
 
    private FilterCodecUtils() {
    }
 
    public static void encodeString(@NotNull final StringBuilder sb, @NotNull final String string) {
        for (final char ch : string.toCharArray()) {
            if (ch == '%' || ch == ',' || ch == ')' || ch == '=' || Character.isISOControl(ch)) {
                sb.append(String.format("%%%04X", (int) ch));
            } else {
                sb.append(ch);
            }
        }
    }
 
    @NotNull
    public static String decodeString(@NotNull final StringBuilder sb) {
        final StringBuilder result = new StringBuilder();
        while (sb.length() > 0) {
            final char ch = sb.charAt(0);
            if (ch == ',' || ch == ')' || ch == '=') {
                break;
            }
            if (ch == '%') {
                result.append((char) Integer.parseInt(sb.substring(1, 5), 16));
                sb.delete(0, 5);
            } else {
                result.append(ch);
                sb.delete(0, 1);
            }
        }
        return result.toString();
    }
 
}