Sint64 SDL_RWseek(SDL_RWops* context,
                  Sint64     offset,
                  int        whence)

SDL_RWops *rw = SDL_RWFromFile("myfile.bin", "rb");
if (rw != NULL)
{
    /* Przesuń się o 0 bajtów względem końca pliku */
    Sint64 length = SDL_RWseek(rw, 0, RW_SEEK_END);
    SDL_RWclose(rw);
    if (length < 0)
    {
        printf("Could not seek inside myfile.bin\n");
    }
    else
    {
        printf("myfile.bin is %d bytes long\n", length);
    }
}