readString method

String readString({ int? size, bool utf8 = true, })

Read a null-terminated string, or if size is provided, that number of bytes returned as a string.

Implementation

String readString({int? size, bool utf8 = true}) {
  String codesToString(List<int> codes) {
    try {
      final str = utf8
          ? const Utf8Decoder().convert(codes)
          : String.fromCharCodes(codes);
      return str;
    } catch (err) {
      // If the string is not a valid UTF8 string, decode it as character
      // codes.
      return String.fromCharCodes(codes);
    }
  }

  if (size == null) {
    final codes = <int>[];
    if (isEOS) {
      return '';
    }
    while (!isEOS) {
      final c = readByte();
      if (c == 0) {
        return codesToString(codes);
      }
      codes.add(c);
    }
    return codesToString(codes);
  }

  final s = readBytes(size);
  final codes = s.toUint8List();
  return codesToString(codes);
}