/// <summary>
/// 返回一个新的时段对象，其值为指定的时段对象与此实例的值之差。
/// </summary>
/// <param name="span">时段</param>
/// <returns>新的时段</returns>
public GnssTimeSpan Subtract(TimeSpan span)
{
GnssTime time = _end;
time.AddSeconds(-span.TotalSeconds);
return(new GnssTimeSpan(_start, time));
}
/// <summary>
/// 返回一个新的时段对象，其值为指定的时段对象与此实例的值之和。
/// </summary>
/// <param name="span">时段</param>
/// <returns>新的时段</returns>
public GnssTimeSpan Add(GnssTimeSpan span)
{
GnssTime time = _end;
time.AddSeconds(span.TotalSeconds);
return(new GnssTimeSpan(_start, time));
}
/// <summary>
/// 时段中是否包含某个时刻
/// </summary>
/// <param name="time">时刻</param>
/// <returns>是否在其中</returns>
public bool Contains(GnssTime time)
{
return((time.CompareTo(_end) <= 0) && (time.CompareTo(_start) >= 0));
}
public GnssTimeSpan(GnssTime start, GnssTime end)
{
_start = start;
_end = end;
_span = _end.Moment - _start.Moment;
}