int ci;

        if (username != null) {
            ci = username.indexOf('@');
            if (ci > 0) {
                domain = username.substring(ci + 1);
                username = username.substring(0, ci);
            } else {
                ci = username.indexOf('\\');
                if (ci > 0) {
                    domain = username.substring(0, ci);

        int i;
        int si = 0;
        int ci = 0;

        do {
            toHexChars( si, c, ci, 5 );
            ci += 5;
            c[ci++] = ':';
            do {
                if( si == length ) {
                    int n = 16 - s;
                    System.arraycopy( SPACE_CHARS, 0, c, ci, n * 3 );
                    ci += n * 3;
                    System.arraycopy( SPACE_CHARS, 0, d, s, n );

        if ( username != null ) {
            int ci = username.indexOf('@');
            if ( ci > 0 ) {
                domain = username.substring(ci + 1);
                username = username.substring(0, ci);
            }
            else {
                ci = username.indexOf('\\');
                if ( ci > 0 ) {
                    domain = username.substring(0, ci);
                    username = username.substring(ci + 1);