private void string(String value) throws IOException {
    String[] replacements = htmlSafe ? HTML_SAFE_REPLACEMENT_CHARS : REPLACEMENT_CHARS;
    out.write("\"");
    int last = 0;
    int length = value.length();
    for (int i = 0; i < length; i++) {
      char c = value.charAt(i);
      String replacement;
      if (c < 128) {
        replacement = replacements[c];
        if (replacement == null) {
          continue;
        }
      } else if (c == '\u2028') {
        replacement = "\\u2028";
      } else if (c == '\u2029') {
        replacement = "\\u2029";
      } else {
        continue;
      }
      if (last < i) {
        out.write(value, last, i - last);
      }
      out.write(replacement);
      last = i + 1;
    }
    if (last < length) {
      out.write(value, last, length - last);
    }
    out.write("\"");
  }