public override ValueEval Evaluate(int srcCellRow, int srcCellCol, ValueEval arg0)
{
double d;
try
{
ValueEval ve = OperandResolver.GetSingleValue(arg0, srcCellRow, srcCellCol);
if (ve is BlankEval)
{
return(NumberEval.ZERO);
}
if (ve is StringEval)
{
// Note - asymmetric with UnaryMinus
// -"hello" Evaluates to #VALUE!
// but +"hello" Evaluates to "hello"
return(ve);
}
d = OperandResolver.CoerceValueToDouble(ve);
}
catch (EvaluationException e)
{
return(e.GetErrorEval());
}
return(new NumberEval(+d));
}
/**
* uses the relevant flags to decode the StringEval
* @param eval
*/
private ValueEval XlateRefStringEval(StringEval sve)
{
if ((flags & REF_STRING_IS_PARSED) > 0)
{
String s = sve.StringValue;
double d = OperandResolver.ParseDouble(s);
if (double.IsNaN(d))
{
return(ErrorEval.VALUE_INVALID);
}
return(new NumberEval(d));
}
// strings are blanks
return(BlankEval.instance);
}
public override ValueEval Evaluate(int srcRowIndex, int srcColumnIndex, ValueEval arg0)
{
double d;
try
{
ValueEval ve = OperandResolver.GetSingleValue(arg0, srcRowIndex, srcColumnIndex);
d = OperandResolver.CoerceValueToDouble(ve);
}
catch (EvaluationException e)
{
return(e.GetErrorEval());
}
if (d == 0.0)
{ // this '==' matches +0.0 and -0.0
return(NumberEval.ZERO);
}
return(new NumberEval(-d));
}
public override ValueEval Evaluate(int srcRowIndex, int srcColumnIndex, ValueEval arg0, ValueEval arg1)
{
ValueEval vA;
ValueEval vB;
try
{
vA = OperandResolver.GetSingleValue(arg0, srcRowIndex, srcColumnIndex);
vB = OperandResolver.GetSingleValue(arg1, srcRowIndex, srcColumnIndex);
}
catch (EvaluationException e)
{
return(e.GetErrorEval());
}
int cmpResult = DoCompare(vA, vB);
bool result = ConvertComparisonResult(cmpResult);
return(BoolEval.ValueOf(result));
}
public override ValueEval Evaluate(int srcRowIndex, int srcColumnIndex, ValueEval arg0, ValueEval arg1)
{
ValueEval ve0;
ValueEval ve1;
try
{
ve0 = OperandResolver.GetSingleValue(arg0, srcRowIndex, srcColumnIndex);
ve1 = OperandResolver.GetSingleValue(arg1, srcRowIndex, srcColumnIndex);
}
catch (EvaluationException e)
{
return(e.GetErrorEval());
}
StringBuilder sb = new StringBuilder();
sb.Append(GetText(ve0));
sb.Append(GetText(ve1));
return(new StringEval(sb.ToString()));
}
/**
* uses the relevant flags to decode the StringEval
* @param eval
*/
private ValueEval XlateStringEval(StringEval eval)
{
if ((flags & STRING_IS_PARSED) > 0)
{
String s = eval.StringValue;
double d = OperandResolver.ParseDouble(s);
if (double.IsNaN(d))
{
return(ErrorEval.VALUE_INVALID);
}
return(new NumberEval(d));
}
// strings are errors?
if ((flags & STRING_IS_INVALID_VALUE) > 0)
{
return(ErrorEval.VALUE_INVALID);
}
// ignore strings
return(XlateBlankEval(BLANK_IS_PARSED));
}
//public int Type
//{
// get
// {
// // TODO - remove
// throw new Exception("obsolete code should not be called");
// }
//}
protected double SingleOperandEvaluate(ValueEval arg, int srcCellRow, int srcCellCol)
{
ValueEval ve = OperandResolver.GetSingleValue(arg, srcCellRow, srcCellCol);
return(OperandResolver.CoerceValueToDouble(ve));
}