Method seek

src/fl/stl/fstream.h:191–194

    fl::size_t pos() const { return mHandle ? mHandle->pos() : 0; }
    fl::size_t bytesLeft() const { return bytes_left(); }
    bool seek(fl::size_t p) {
        seekg(p, ios::seekdir::beg);
        return good();
    }
    bool seek(fl::size_t p, seek_dir dir) {
        ios::seekdir d = (dir == seek_dir::beg) ? ios::seekdir::beg :
                         (dir == seek_dir::cur) ? ios::seekdir::cur : ios::seekdir::end;