void IOperation.Exec(DataStack stack, IDataAccess extdata)
{
var b = (double)stack.Pop();
var a = (double)stack.Pop();
stack.Push(a - b);
}
void IOperation.Exec(DataStack stack, IDataAccess extdata)
{
object ob = stack.Pop();
object oa = stack.Pop();
bool isTrue = OperationHelpers.EvaluateAsLogicalTrue(oa);
stack.Push(isTrue ? ob : oa);
}
/// <summary>
/// Execute the compiled script
/// </summary>
/// <param name="xdata"></param>
/// <returns></returns>
public RunResult Execute(IDataAccess xdata)
{
var cstream = this.CodeStream;
var stack = new DataStack();
while (++stack.InstructionIndex < cstream.InstructList.Count)
{
cstream.InstructList[stack.InstructionIndex].Exec(stack, xdata);
}
var result = new RunResult();
switch (stack.DataIndex)
{
case -1:
break;
case 0:
result.Result = stack.Pop();
result.HasResult = true;
break;
default:
result.Error = new RuntimeException(
$"The data stack still contains {stack.DataIndex + 1} items."
);
break;
}
return(result);
}
void IOperation.Exec(DataStack stack, IDataAccess extdata)
{
object oa = stack.Pop();
bool isTrue = OperationHelpers.EvaluateAsLogicalTrue(oa);
if (isTrue)
{
stack.InstructionIndex = this.Position - 1;
}
}
void IOperation.Exec(DataStack stack, IDataAccess xdata)
{
xdata.SetData(this.VarName1, stack.Pop());
}
void IOperation.Exec(DataStack stack, IDataAccess xdata)
{
stack.Registers[this.RegName1] = stack.Pop();
}