/**
     * Splits a string in several parts (tokens) that are separated by delimiter
     * characters. Delimiter may contains any number of character and it is
     * always surrounded by two strings.
     *
     * @param src    source to examine
     * @param d      string with delimiter characters
     *
     * @return array of tokens
     */
    public static String[] splitc(final String src, final String d) {
        if ((d.length() == 0) || (src.length() == 0)) {
            return new String[] {src};
        }
        return splitc(src, d.toCharArray());
    }
    /**
     * Splits a string in several parts (tokens) that are separated by delimiter
     * characters. Delimiter may contains any number of character and it is
     * always surrounded by two strings.
     *
     * @param src           source to examine
     * @param delimiters    char array with delimiter characters
     *
     * @return array of tokens
     */
    public static String[] splitc(final String src, final char[] delimiters) {
        if ((delimiters.length == 0) || (src.length() == 0) ) {
            return new String[] {src};
        }
        char[] srcc = src.toCharArray();

        int maxparts = srcc.length + 1;
        int[] start = new int[maxparts];
        int[] end = new int[maxparts];

        int count = 0;

        start[0] = 0;
        int s = 0, e;
        if (CharUtil.equalsOne(srcc[0], delimiters)) {  // string starts with delimiter
            end[0] = 0;
            count++;
            s = CharUtil.findFirstDiff(srcc, 1, delimiters);
            if (s == -1) {                          // nothing after delimiters
                return new String[] {EMPTY, EMPTY};
            }
            start[1] = s;                           // new start
        }
        while (true) {
            // find new end
            e = CharUtil.findFirstEqual(srcc, s, delimiters);
            if (e == -1) {
                end[count] = srcc.length;
                break;
            }
            end[count] = e;

            // find new start
            count++;
            s = CharUtil.findFirstDiff(srcc, e, delimiters);
            if (s == -1) {
                start[count] = end[count] = srcc.length;
                break;
            }
            start[count] = s;
        }
        count++;
        String[] result = new String[count];
        for (int i = 0; i < count; i++) {
            result[i] = src.substring(start[i], end[i]);
        }
        return result;
    }

    /**
     * Splits a string in several parts (tokens) that are separated by single delimiter
     * characters. Delimiter is always surrounded by two strings.
     *
     * @param src           source to examine
     * @param delimiter     delimiter character
     *
     * @return array of tokens
     */
    public static String[] splitc(final String src, final char delimiter) {
        if (src.length() == 0) {
            return new String[] {EMPTY};
        }
        char[] srcc = src.toCharArray();

        int maxparts = srcc.length + 1;
        int[] start = new int[maxparts];
        int[] end = new int[maxparts];

        int count = 0;

        start[0] = 0;
        int s = 0, e;
        if (srcc[0] == delimiter) { // string starts with delimiter
            end[0] = 0;
            count++;
            s = CharUtil.findFirstDiff(srcc, 1, delimiter);
            if (s == -1) {                          // nothing after delimiters
                return new String[] {EMPTY, EMPTY};
            }
            start[1] = s;                           // new start
        }
        while (true) {
            // find new end
            e = CharUtil.findFirstEqual(srcc, s, delimiter);
            if (e == -1) {
                end[count] = srcc.length;
                break;
            }
            end[count] = e;

            // find new start
            count++;
            s = CharUtil.findFirstDiff(srcc, e, delimiter);
            if (s == -1) {
                start[count] = end[count] = srcc.length;
                break;
            }
            start[count] = s;
        }
        count++;
        String[] result = new String[count];
        for (int i = 0; i < count; i++) {
            result[i] = src.substring(start[i], end[i]);
        }
        return result;
    }