Function pomp_encoder_write 

pub unsafe extern "C" fn pomp_encoder_write(
    enc: *mut pomp_encoder,
    fmt: *const c_char,
    ...
) -> c_int

Encode arguments according to given format string. @param enc : encoder. @param fmt : format string. Can be NULL if no arguments given. @param … : arguments. @return 0 in case of success, negative errno value in case of error.