String _getWritableChar()

in lib/src/header_parser/sub_parsers/macro_parser.dart [274:316]

• 34 lines of code
• 14 McCabe index (conditional complexity)

String _getWritableChar(int char, {bool utf8 = true}) {
  /// Handle control characters.
  if (char >= 0 && char < 32 || char == 127) {
    /// Handle these - `\b \t \n \v \f \r` as special cases.
    switch (char) {
      case 8: // \b
        return r'\b';
      case 9: // \t
        return r'\t';
      case 10: // \n
        return r'\n';
      case 11: // \v
        return r'\v';
      case 12: // \f
        return r'\f';
      case 13: // \r
        return r'\r';
      default:
        final h = char.toRadixString(16).toUpperCase().padLeft(2, '0');
        return '\\x$h';
    }
  }

  /// Handle characters - `$ ' \` these need to be escaped when writing to file.
  switch (char) {
    case 36: // $
      return r'\$';
    case 39: // '
      return r"\'";
    case 92: // \
      return r'\\';
  }

  /// In case encoding is not Utf8, we know all characters will fall in [0..255]
  /// Print range [128..255] as `\xHH`.
  if (!utf8) {
    final h = char.toRadixString(16).toUpperCase().padLeft(2, '0');
    return '\\x$h';
  }

  /// In all other cases, simply convert to string.
  return String.fromCharCode(char);
}