Function ion_c_sys::ion_timestamp_to_string

pub unsafe extern "C" fn ion_timestamp_to_string(
    ptime: *mut ION_TIMESTAMP, 
    buffer: *mut c_char, 
    buf_length: SIZE, 
    output_length: *mut SIZE, 
    pcontext: *mut decContext
) -> iERR

Get the string format of timestamp.