Ditto; uses the current wall clock time.
Generates a HTTP compliant date/time string (asctime) from t.
Generates a HTTP compliant date/time string from t and stores it in dst. dst.length must be ResultLength.
Ditto; uses the current wall clock time.
Callback function to obtain the wall clock time. By default (null) the system time is queried using time() of the C stdlib. An application may set its own time function, if desired.
Date/time string length constant