internal static bool Evaluate(RPNContext context)
{
if (OPERATORS.Contains(context.Current))
{
switch (context.Current)
{
case "date":
{
var len = context.Stack.Pop();
var parts = new List<int>();
for (var i = 0; i < len; i++)
parts.Add(Convert.ToInt32(context.Stack.Pop()));
parts.Reverse();
DateTime date = new DateTime();
date = date.AddYears(parts.Count > 0 ? parts[0] - 1 : 0);
date = date.AddMonths(parts.Count > 1 ? parts[1] - 1 : 0);
date = date.AddDays(parts.Count > 2 ? parts[2] - 1 : 0);
date = date.AddHours(parts.Count > 3 ? parts[3] : 0);
date = date.AddMinutes(parts.Count > 4 ? parts[4] : 0);
date = date.AddSeconds(parts.Count > 5 ? parts[5] : 0);
date = date.AddMilliseconds(parts.Count > 6 ? parts[6] : 0);
context.Stack.Push(date);
break;
}
case "days":
case "day":
{
var x = Convert.ToInt32(context.Stack.Pop());
var ts = new TimeSpan(x, 0, 0, 0);
context.Stack.Push(ts);
break;
}
case "hours":
case "hour":
{
var x = Convert.ToInt32(context.Stack.Pop());
var ts = new TimeSpan(0, x, 0, 0);
context.Stack.Push(ts);
break;
}
case "minutes":
case "minute":
{
var x = Convert.ToInt32(context.Stack.Pop());
var ts = new TimeSpan(0, 0, x, 0);
context.Stack.Push(ts);
break;
}
case "seconds":
case "second":
{
var x = Convert.ToInt32(context.Stack.Pop());
var ts = new TimeSpan(0, 0, 0, x);
context.Stack.Push(ts);
break;
}
case "month":
case "months":
{
var x = Convert.ToInt32(context.Stack.Pop());
var ts = new ExtendedTimeSpan(0, x);
context.Stack.Push(ts);
break;
}
case "year":
case "years":
{
var x = Convert.ToInt32(context.Stack.Pop());
var ts = new ExtendedTimeSpan(x, 0);
context.Stack.Push(ts);
break;
}
case "ts":
{
var s = Convert.ToInt32(context.Stack.Pop());
var m = Convert.ToInt32(context.Stack.Pop());
var h = Convert.ToInt32(context.Stack.Pop());
var d = Convert.ToInt32(context.Stack.Pop());
var ts = new TimeSpan(d, h, m, s);
context.Stack.Push(ts);
break;
}
case "+":
{
if (context.Stack.First() is TimeSpan)
{
return SumTimeSpan(context);
}
if (context.Stack.First() is ExtendedTimeSpan)
{
return SumExtendedTimeSpan(context);
}
return false;
}
case "-":
{
if (context.Stack.First() is TimeSpan)
{
return SubtractTimeSpan(context);
}
if (context.Stack.First() is ExtendedTimeSpan)
{
context.Stack.First().Invert();
return SumExtendedTimeSpan(context);
}
return false;
}
}
return true;
}
return false;
}
public int ToUnitCount(ExtendedTimeSpan timeSpan)
{
switch (TimeRulerUnit)
{
case TimeRulerUnit.Day:
return (int)Math.Floor(timeSpan.TotalDays);
case TimeRulerUnit.Hour:
return (int)Math.Floor(timeSpan.TotalHours);
case TimeRulerUnit.Minute:
return (int)Math.Floor(timeSpan.TotalMinutes);
case TimeRulerUnit.Second:
return (int)Math.Floor(timeSpan.TotalSeconds);
default:
return default(int);
}
}
