## programação
            if (((write_ptr_ - (uint8_t*) file_header_) % a_size) != 0) {
                padding = a_size - ((write_ptr_ - (uint8_t*) file_header_) % a_size);
                MakeRoomFor(padding);
                while (padding--) {
                    *(write_ptr_++) = 0xAA; // @todo put zeros
                }
            }

## mais programação

            padding += (a_size - (write_ptr_ - (uint8_t*)file_header_) % a_size) % a_size;
            if (padding > 0) {
                MakeRoomFor(padding);
                while (padding--) {
                    *(write_ptr_++) = 0x00;
                }
            }