code: boolean isCodeInCCLength(int encLength, int code) {
          boolean found;
  
          if (encLength > 1 || code >= BitSet.SINGLE_BYTE_SIZE) {
              if (mbuf == null) {
                  found = false;
              } else {
                  found = CodeRange.isInCodeRange(mbuf.getCodeRange(), code);
              }
          } else {
              found = bs.at(code);
          }
  
          if (isNot()) {
              return !found;
          } else {
              return found;
          }
      }
docs: onig_is_code_in_cc_len