int len = sequence.length();
    for (int i = 0; i < len; i++) {
      char c = sequence.charAt(i);
      if (matches(c)) {
        if (c == replacement && (i == len - 1 || !matches(sequence.charAt(i + 1)))) {
          // a no-op replacement
          i++;
        } else {
          StringBuilder builder = new StringBuilder(len).append(sequence, 0, i).append(replacement);

        try {
            final byte[] buf = new byte[DEFAULT_BUF_SIZE];
            int len;
            int amount = 0;
            while ((len = in.read(buf)) != -1) {
                out.write(buf, 0, len);
                amount += len;
            }
            out.flush();
            return amount;
        } catch (final IOException e) {

    int len = sequence.length();
    for (int i = 0; i < len; i++) {
      char c = sequence.charAt(i);
      if (matches(c)) {
        if (c == replacement && (i == len - 1 || !matches(sequence.charAt(i + 1)))) {
          // a no-op replacement
          i++;
        } else {
          StringBuilder builder = new StringBuilder(len).append(sequence, 0, i).append(replacement);

            cur.setReadSize(rl);
            int len = cur.decode(buffer, 0);

            if ( len > rl ) {
                throw new IOException(String.format("WHAT? ( read %d decoded %d ): %s", rl, len, cur));
            }
            else if ( nextCommand != 0 && len > nextCommand ) {
                throw new IOException("Overlapping commands");
            }

            }

            for ( int off = 0; off < sids.length; off += 64 ) {
                int len = sids.length - off;
                if ( len > 64 )
                    len = 64;

                getContext().getSIDResolver().resolveSids(getContext(), server, sids, off, len);
            }
        }
        else {
            for ( ai = 0; ai < aces.length; ai++ ) {