Function gmp_mpfr_sys::gmp::mpf_get_str

pub unsafe extern "C" fn mpf_get_str(
    str: *mut c_char,
    expptr: *mut exp_t,
    base: c_int,
    n_digits: usize,
    op: *const mpf_t
) -> *mut c_char

See: mpf_get_str