checkNotNull(a);
    checkNotNull(b);

    int maxPrefixLength = min(a.length(), b.length());
    int p = 0;
    while (p < maxPrefixLength && a.charAt(p) == b.charAt(p)) {
      p++;
    }
    if (validSurrogatePairAt(a, p - 1) || validSurrogatePairAt(b, p - 1)) {
      p--;
    }
    return a.subSequence(0, p).toString();
  }

  /**

    }

    private String parseServerAndShare(final String pathInfo) {
        final char[] out = new char[256];
        char ch;
        int len, p, i;

        if (pathInfo == null) {
            return null;
        }
        len = pathInfo.length();

        p = i = 0;
        while (p < len && pathInfo.charAt(p) == '/') {
            p++;
        }
        if (p == len) {
            return null;

            char charA = (i < a.length) ? a[i] : '\0';
            char charB = (i < b.length) ? b[i] : '\0';
            result &= (charA == charB) ? 1 : 0;
        }

        return result == 1;
    }

    /** The authentication type */
    private AuthenticationType type;
    /** The authentication domain */
    private String domain;
    /** The username for authentication */

        if (!Character.isDigit(host.charAt(0))) {
            return doNameQuery(name, svr);
        }

        int IP = 0x00;
        int hitDots = 0;
        final char[] data = host.toCharArray();

        for (int i = 0; i < data.length; i++) {
            char c = data[i];
            if (c < 48 || c > 57) {
                return doNameQuery(name, svr);

     */
    @Override
    public void setPath(String path) {
        if (path.length() > 0 && path.charAt(0) == '\\') {
            path = path.substring(1);
        }
        // win8.1 returns ACCESS_DENIED if the trailing backslash is included
        if (path.length() > 1 && path.charAt(path.length() - 1) == '\\') {
            path = path.substring(0, path.length() - 1);
        }
        this.name = path;

            return username;
        }

        // Show first and last character only
        if (username.length() <= 2) {
            return "***";
        }

        return username.charAt(0) + "***" + username.charAt(username.length() - 1);
    }

    private String maskIpAddress(String ip) {
        if (!maskSensitiveData || ip == null) {
            return ip;
        }

            throw new SmbException(fieldName + " contains null bytes");
        }

        // Check for control characters
        for (int i = 0; i < str.length(); i++) {
            char c = str.charAt(i);
            if (c < 0x20 && c != '\t' && c != '\r' && c != '\n') {
                failedValidations.incrementAndGet();
                log.warn("{} contains control characters", fieldName);

                String server = authorityServerName;
                final int dot = server.indexOf('.');
                if (dot > 0 && !Character.isDigit(server.charAt(0))) {
                    server = server.substring(0, dot);
                }
                try (LsaPolicyHandle policyHandle = new LsaPolicyHandle(handle, "\\\\" + server, 0x00000800)) {

        String text = "Test123 ABC-456";
        String field = "content";
        String lang = "en";

        List<AnalyzeToken> tokens = analyzer.analyzeAndReading(text, field, lang);

        assertNotNull(tokens);
        assertEquals(2, tokens.size()); // "Test123" and "ABC-456" (hyphen is not a split char in our tokenizer)

            int rn) throws CIFSException {
        if (log.isDebugEnabled()) {
            log.debug("Resolving DFS path " + path);
        }

        if (path.length() >= 2 && path.charAt(0) == '\\' && path.charAt(1) == '\\') {
            throw new SmbException("Path must not start with double slash: " + path);
        }

        try (SmbSessionImpl sess = getSmbSession(ctx, targetHost, targetDomain);