/// <summary>
/// Convert a <see cref="uint"/> back to a <see cref="DateTime"/> value. Zero input is returned as a NULL value.
/// </summary>
/// <param name="value">The value from the <see cref="ToUInt(DateTime, DateTime?)"/> conversion.</param>
/// <param name="offset">The base starting point for the conversion. If NULL, the <see cref="CURRENT_EPOCH"/> constant is used.</param>
/// <returns>The original DateTime value</returns>
public static DateTime?FromUInt(this uint value, DateTime?offset = null)
{
if (value == 0)
{
return(null);
}
if (offset == null)
{
offset = CURRENT_EPOCH;
}
byte[] vs = BitConverter.GetBytes(value);
Array.Reverse(vs);
byte[] dArr = new byte[2];
byte[] mArr = new byte[2];
Array.Copy(vs, dArr, 2);
Array.Reverse(dArr);
Array.Copy(vs, 2, mArr, 0, 2);
TwoNybbles nybbles = new TwoNybbles(mArr[1]);
mArr[1] = nybbles.High;
ushort day = BitConverter.ToUInt16(dArr, 0);
ushort min = BitConverter.ToUInt16(mArr, 0);
return(offset.Value.AddDays(day).AddMinutes(min).AddSeconds(nybbles.Low * 4));
}
public virtual void SetSchedule(SchedulePage schedulePage, Schedule schedule)
{
var commandData = schedule.ToBytes();
commandData[0] = new TwoNybbles((byte)schedulePage, commandData[0]).Value;
Set(SicpCommands.SchedulingSet, commandData);
}
/// <summary>
/// Convert a <see cref="DateTime?"/> value to a <see cref="uint"/> (null values become zero)
/// </summary>
/// <param name="dt">The DateTime value to convert</param>
/// <param name="offset">The base starting point for the conversion. If NULL, the <see cref="CURRENT_EPOCH"/> constant is used.</param>
/// <returns>The input represented by a uint</returns>
public static uint ToUInt(this DateTime dt, DateTime?offset = null)
{
if (offset == null)
{
offset = CURRENT_EPOCH;
}
TimeSpan ts = dt - offset.Value;
ushort days = (ushort)ts.TotalDays;
ushort min = (ushort)(ts.Hours * 60 + ts.Minutes);
byte sec = (byte)(ts.Seconds / 4);
byte[] vs = new byte[4];
byte[] dArr = BitConverter.GetBytes(days);
Array.Reverse(dArr);
byte[] mArr = BitConverter.GetBytes(min);
Array.Copy(dArr, vs, 2);
TwoNybbles nybbles = new TwoNybbles(mArr[1], sec);
mArr[1] = nybbles.Full;
Array.Copy(mArr, 0, vs, 2, 2);
Array.Reverse(vs);
return(BitConverter.ToUInt32(vs, 0));
}
