using System;
/*
 * $Id: StringTokenizer.cs 106 2009-12-07 12:23:50Z psoares33 $
 *
 * This file is part of the iText project.
 * Copyright (c) 1998-2012 1T3XT BVBA
 * Authors: Bruno Lowagie, Paulo Soares, et al.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License version 3
 * as published by the Free Software Foundation with the addition of the
 * following permission added to Section 15 as permitted in Section 7(a):
 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY 1T3XT,
 * 1T3XT DISCLAIMS THE WARRANTY OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
 *
 * 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 Affero General Public License for more details.
 * You should have received a copy of the GNU Affero General Public License
 * along with this program; if not, see http://www.gnu.org/licenses or write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA, 02110-1301 USA, or download the license from the following URL:
 * http://itextpdf.com/terms-of-use/
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public License,
 * you must retain the producer line in every PDF that is created or manipulated
 * using iText.
 *
 * You can be released from the requirements of the license by purchasing
 * a commercial license. Buying such a license is mandatory as soon as you
 * develop commercial activities involving the iText software without
 * disclosing the source code of your own applications.
 * These activities include: offering paid services to customers as an ASP,
 * serving PDFs on the fly in a web application, shipping iText with a closed
 * source product.
 *
 * For more information, please contact iText Software Corp. at this
 * address: sales@itextpdf.com
 */

namespace System.util {

    // a replacement for the StringTokenizer java class
    public class StringTokenizer {
        private int pos;
        private String str;
        private int len;
        private String delim;
        private bool retDelims;

        public StringTokenizer(String str) : this(str, " \t\n\r\f", false) {
        }

        public StringTokenizer(String str, String delim) : this(str, delim, false) {
        }

        public StringTokenizer(String str, String delim, bool retDelims) {
            len = str.Length;
            this.str = str;
            this.delim = delim;
            this.retDelims = retDelims;
            this.pos = 0;
        }

        public bool HasMoreTokens() {
            if (! retDelims) {
                while (pos < len && delim.IndexOf(str[pos]) >= 0)
                    pos++;
            }
            return pos < len;
        }

        public String NextToken(String delim) {
            this.delim = delim;
            return NextToken();
        }

        public String NextToken() {
            if (pos < len && delim.IndexOf(str[pos]) >= 0) {
                if (retDelims)
                    return str.Substring(pos++, 1);
                while (++pos < len && delim.IndexOf(str[pos]) >= 0);
            }
            if (pos < len) {
                int start = pos;
                while (++pos < len && delim.IndexOf(str[pos]) < 0);

                return str.Substring(start, pos - start);
            }
            throw new IndexOutOfRangeException();
        }

        public int CountTokens() {
            int count = 0;
            int delimiterCount = 0;
            bool tokenFound = false;
            int tmpPos = pos;

            while (tmpPos < len) {
                if (delim.IndexOf(str[tmpPos++]) >= 0) {
                    if (tokenFound) {
                        count++;
                        tokenFound = false;
                    }
                    delimiterCount++;
                }
                else {
                    tokenFound = true;
                    while (tmpPos < len
                        && delim.IndexOf(str[tmpPos]) < 0)
                        ++tmpPos;
                }
            }
            if (tokenFound)
                count++;
            return retDelims ? count + delimiterCount : count;
        }
    }
}
