private Memezo.Value BinaryOperation(Memezo.Value first, Memezo.Value second, Memezo.TokenType tokenType)
{
DateTime firstDateTime = DateTime.MinValue;
DateTime secondDateTime = DateTime.MinValue;
TimeSpan firstTimeSpan = TimeSpan.MinValue;
TimeSpan secondTimeSpan = TimeSpan.MinValue;
var firstType =
(first.DataType == Memezo.DataType.Number) ? ContentType.Number :
DateTimeUtility.TryParseDateTime(first.String, out firstDateTime) ? ContentType.DateTime :
DateTimeUtility.TryParseTimeSpan(first.String, out firstTimeSpan) ? ContentType.TimeSpan :
ContentType.String;
var secondType =
(second.DataType == Memezo.DataType.Number) ? ContentType.Number :
DateTimeUtility.TryParseDateTime(second.String, out secondDateTime) ? ContentType.DateTime :
DateTimeUtility.TryParseTimeSpan(second.String, out secondTimeSpan) ? ContentType.TimeSpan :
ContentType.String;
if (firstType == ContentType.DateTime && secondType == ContentType.DateTime)
{
if (tokenType == Memezo.TokenType.Minus)
{
var span = firstDateTime - secondDateTime;
return(new Memezo.Value(DateTimeUtility.TimeSpanToString(span)));
}
}
else if (firstType == ContentType.DateTime && secondType == ContentType.TimeSpan)
{
if (tokenType == Memezo.TokenType.Plus || tokenType == Memezo.TokenType.Minus)
{
var date = (tokenType == Memezo.TokenType.Plus) ?
(firstDateTime + secondTimeSpan) :
(firstDateTime - secondTimeSpan);
return(new Memezo.Value(DateTimeUtility.DateTimeToString(date)));
}
}
else if (firstType == ContentType.TimeSpan && secondType == ContentType.TimeSpan)
{
if (tokenType == Memezo.TokenType.Plus || tokenType == Memezo.TokenType.Minus)
{
var span = (tokenType == Memezo.TokenType.Plus) ?
(firstTimeSpan + secondTimeSpan) :
(firstTimeSpan - secondTimeSpan);
return(new Memezo.Value(DateTimeUtility.TimeSpanToString(span)));
}
}
else if (firstType == ContentType.TimeSpan && secondType == ContentType.Number)
{
if (tokenType == Memezo.TokenType.Multiply || tokenType == Memezo.TokenType.Division)
{
var ticks = (tokenType == Memezo.TokenType.Multiply) ?
(firstTimeSpan.Ticks * second.Number) :
(firstTimeSpan.Ticks / second.Number);
if (ticks < long.MinValue || long.MaxValue < ticks)
{
throw new OverflowException();
}
return(new Memezo.Value(DateTimeUtility.TimeSpanToString(new TimeSpan((long)ticks))));
}
}
else
{
;
}
return(null);
}
private void SetResult(Memezo.Value value)
{
this.Result =
DateTimeUtility.TryParseDateTime(value.String, out var dateTime) ? $"'{DateTimeUtility.DateTimeToString(dateTime)}'" :
DateTimeUtility.TryParseTimeSpan(value.String, out var timeSpan) ? $"'{DateTimeUtility.TimeSpanToString(timeSpan)}'" :
value.ToString();
}