public override ValueEval Evaluate(int srcRowIndex, int srcColumnIndex, ValueEval arg0,
ValueEval arg1)
{
string arg;
int index;
try
{
arg = TextFunction.EvaluateStringArg(arg0, srcRowIndex, srcColumnIndex);
index = TextFunction.EvaluateIntArg(arg1, srcRowIndex, srcColumnIndex);
}
catch (EvaluationException e)
{
return(e.GetErrorEval());
}
if (index < 0)
{
return(ErrorEval.VALUE_INVALID);
}
string result;
if (_isLeft)
{
result = arg.Substring(0, Math.Min(arg.Length, index));
}
else
{
result = arg.Substring(Math.Max(0, arg.Length - index));
}
return(new StringEval(result));
}
public override ValueEval Evaluate(int srcRowIndex, int srcColumnIndex, ValueEval arg0, ValueEval arg1)
{
try
{
string needle = TextFunction.EvaluateStringArg(arg0, srcRowIndex, srcColumnIndex);
string haystack = TextFunction.EvaluateStringArg(arg1, srcRowIndex, srcColumnIndex);
return(Eval(haystack, needle, 0));
}
catch (EvaluationException e)
{
return(e.GetErrorEval());
}
}
public override ValueEval Evaluate(string arg)
{
StringBuilder result = new StringBuilder();
for (int i = 0; i < arg.Length; i++)
{
char c = arg[i];
if (TextFunction.IsPrintable(c))
{
result.Append(c);
}
}
return(new StringEval(result.ToString()));
}
public override ValueEval Evaluate(int srcRowIndex, int srcColumnIndex, ValueEval arg0)
{
int arg;
try
{
arg = TextFunction.EvaluateIntArg(arg0, srcRowIndex, srcColumnIndex);
if (arg < 0 || arg >= 256)
{
throw new EvaluationException(ErrorEval.VALUE_INVALID);
}
}
catch (EvaluationException e)
{
return(e.GetErrorEval());
}
return(new StringEval(Convert.ToString((char)arg, CultureInfo.CurrentCulture)));
}
public override ValueEval Evaluate(int srcRowIndex, int srcColumnIndex, ValueEval arg0, ValueEval arg1,
ValueEval arg2)
{
try
{
string needle = TextFunction.EvaluateStringArg(arg0, srcRowIndex, srcColumnIndex);
string haystack = TextFunction.EvaluateStringArg(arg1, srcRowIndex, srcColumnIndex);
// evaluate third arg and convert from 1-based to 0-based index
int startpos = TextFunction.EvaluateIntArg(arg2, srcRowIndex, srcColumnIndex) - 1;
if (startpos < 0)
{
return(ErrorEval.VALUE_INVALID);
}
return(Eval(haystack, needle, startpos));
}
catch (EvaluationException e)
{
return(e.GetErrorEval());
}
}
public override ValueEval Evaluate(int srcRowIndex, int srcColumnIndex, ValueEval arg0, ValueEval arg1)
{
double s0;
string s1;
try
{
s0 = TextFunction.EvaluateDoubleArg(arg0, srcRowIndex, srcColumnIndex);
s1 = TextFunction.EvaluateStringArg(arg1, srcRowIndex, srcColumnIndex);
}
catch (EvaluationException e)
{
return(e.GetErrorEval());
}
try
{
// Ask DataFormatter to handle the String for us
string formattedStr = Formatter.FormatRawCellContents(s0, -1, s1);
return(new StringEval(formattedStr));
}
catch (Exception)
{
return(ErrorEval.VALUE_INVALID);
}
//if (Regex.Match(s1, "[y|m|M|d|s|h]+").Success)
//{
// //may be datetime string
// ValueEval result = TryParseDateTime(s0, s1);
// if (result != ErrorEval.VALUE_INVALID)
// return result;
//}
////The regular expression needs ^ and $.
//if (Regex.Match(s1, @"^[\d,\#,\.,\$,\,]+$").Success)
//{
// //TODO: simulate DecimalFormat class in java.
// FormatBase formatter = new DecimalFormat(s1);
// return new StringEval(formatter.Format(s0, CultureInfo.CurrentCulture));
//}
//else if (s1.IndexOf("/", StringComparison.Ordinal) == s1.LastIndexOf("/", StringComparison.Ordinal) && s1.IndexOf("/", StringComparison.Ordinal) >= 0 && !s1.Contains("-"))
//{
// double wholePart = Math.Floor(s0);
// double decPart = s0 - wholePart;
// if (wholePart * decPart == 0)
// {
// return new StringEval("0");
// }
// String[] parts = s1.Split(' ');
// String[] fractParts;
// if (parts.Length == 2)
// {
// fractParts = parts[1].Split('/');
// }
// else
// {
// fractParts = s1.Split('/');
// }
// if (fractParts.Length == 2)
// {
// double minVal = 1.0;
// double currDenom = Math.Pow(10, fractParts[1].Length) - 1d;
// double currNeum = 0;
// for (int i = (int)(Math.Pow(10, fractParts[1].Length) - 1d); i > 0; i--)
// {
// for (int i2 = (int)(Math.Pow(10, fractParts[1].Length) - 1d); i2 > 0; i2--)
// {
// if (minVal >= Math.Abs((double)i2 / (double)i - decPart))
// {
// currDenom = i;
// currNeum = i2;
// minVal = Math.Abs((double)i2 / (double)i - decPart);
// }
// }
// }
// FormatBase neumFormatter = new DecimalFormat(fractParts[0]);
// FormatBase denomFormatter = new DecimalFormat(fractParts[1]);
// if (parts.Length == 2)
// {
// FormatBase wholeFormatter = new DecimalFormat(parts[0]);
// String result = wholeFormatter.Format(wholePart, CultureInfo.CurrentCulture) + " " + neumFormatter.Format(currNeum, CultureInfo.CurrentCulture) + "/" + denomFormatter.Format(currDenom, CultureInfo.CurrentCulture);
// return new StringEval(result);
// }
// else
// {
// String result = neumFormatter.Format(currNeum + (currDenom * wholePart), CultureInfo.CurrentCulture) + "/" + denomFormatter.Format(currDenom, CultureInfo.CurrentCulture);
// return new StringEval(result);
// }
// }
// else
// {
// return ErrorEval.VALUE_INVALID;
// }
//}
//else
//{
// return TryParseDateTime(s0, s1);
//}
}