private string EventNodeStateVariable(Cdn.EventLogicalNode node,
EventNodeState.StateType type,
Context context)
{
var st = d_program.StateTable[EventNodeState.Key(node, type)];
return(String.Format("{0}[{1}]", context.This(d_program.StateTable), st.AliasOrIndex));
}
private string EventConditionHolds(Cdn.Event ev,
Cdn.EventLogicalNode node,
EventNodeState.StateType type,
Context context)
{
var st = EventNodeStateVariable(node, type, context);
switch (node.CompareType)
{
case Cdn.MathFunctionType.Less:
case Cdn.MathFunctionType.Greater:
return(String.Format("{0} > 0",
st));
case Cdn.MathFunctionType.LessOrEqual:
case Cdn.MathFunctionType.GreaterOrEqual:
case Cdn.MathFunctionType.And:
case Cdn.MathFunctionType.Or:
return(String.Format("{0} >= 0",
st));
case Cdn.MathFunctionType.Equal:
if (ev.Approximation != Double.MaxValue)
{
var approx = context.TranslateNumber(ev.Approximation);
return(String.Format("{0}({1}) <= {2}",
context.MathFunction(MathFunctionType.Abs, 1),
st,
approx));
}
else
{
return("1");
}
default:
return("0");
}
}
public static string Key(Cdn.EventLogicalNode node, StateType type)
{
return(String.Format("{0}@{1}", node.Handle, type));
}
public EventNodeState(Cdn.Event ev, Cdn.EventLogicalNode node, StateType type) : base(node, (Cdn.Expression)(type == StateType.Current ? node.Expression : null), State.Flags.EventNode)
{
d_type = type;
d_node = node;
d_event = ev;
}
