Function gnunet_sys::GNUNET_BIO_write_spec_double

pub unsafe extern "C" fn GNUNET_BIO_write_spec_double(
    what: *const c_char, 
    f: *mut f64
) -> GNUNET_BIO_WriteSpec

Create the specification to write an double.

@param what describes what is being written (for error message creation) @param f pointer to a double @return the write spec