Function pomp_encoder_write_buf 

pub unsafe extern "C" fn pomp_encoder_write_buf(
    enc: *mut pomp_encoder,
    v: *const c_void,
    n: u32,
) -> c_int

Encode a buffer. @param enc : encoder. @param v : buffer to encode. @param n : buffer size. @return 0 in case of success, negative errno value in case of error.