ver_33.py 文件源码

def retrieve_vfp_datetime(bytes, fielddef, *ignore):
    """
    returns the date/time stored in bytes; dates <= 01/01/1981 00:00:00
    may not be accurate;  BC dates are nulled.
    """
    # two four-byte integers store the date and time.
    # millesecords are discarded from time
    if bytes == array('B', [0] * 8):
        cls = fielddef[EMPTY]
        if cls is NoneType:
            return None
        return cls()
    cls = fielddef[CLASS]
    time = unpack_long_int(bytes[4:])
    microseconds = (time % 1000) * 1000
    time = time // 1000                      # int(round(time, -3)) // 1000 discard milliseconds
    hours = time // 3600
    mins = time % 3600 // 60
    secs = time % 3600 % 60
    time = datetime.time(hours, mins, secs, microseconds)
    possible = unpack_long_int(bytes[:4])
    possible -= VFPTIME
    possible = max(0, possible)
    date = datetime.date.fromordinal(possible)
    return cls(date.year, date.month, date.day, time.hour, time.minute, time.second, time.microsecond)