Function nanocbor_get_uint64

pub unsafe extern "C" fn nanocbor_get_uint64(
    cvalue: *mut nanocbor_value_t,
    value: *mut u64,
) -> c_int

@brief Retrieve a positive integer as uint64_t from the stream

If the value at cvalue is greater than 64 bit, error is returned.

The resulting @p value is undefined if the result is an error condition

@param[in] cvalue CBOR value to decode from @param[out] value returned positive integer

@return number of bytes read @return negative on error