private string Substring(XPathNodeIterator nodeIterator)
{
string str1 = argList[0].Evaluate(nodeIterator).ToString();
double num = XmlConvertEx.XPathRound(XmlConvertEx.ToXPathDouble(argList[1].Evaluate(nodeIterator))) - 1;
if (Double.IsNaN(num) || str1.Length <= num)
{
return(string.Empty);
}
if (argList.Count == 3)
{
double num1 = XmlConvertEx.XPathRound(XmlConvertEx.ToXPathDouble(argList[2].Evaluate(nodeIterator)));
if (Double.IsNaN(num1))
{
return(string.Empty);
}
if (num < 0 || num1 < 0)
{
num1 = num + num1;
// NOTE: condition is true for NaN
if (!(num1 > 0))
{
return(string.Empty);
}
num = 0;
}
double maxlength = str1.Length - num;
if (num1 > maxlength)
{
num1 = maxlength;
}
return(str1.Substring((int)num, (int)num1));
}
if (num < 0)
{
num = 0;
}
return(str1.Substring((int)num));
}
private double Round(XPathNodeIterator nodeIterator)
{
double n = XmlConvertEx.ToXPathDouble(arg.Evaluate(nodeIterator));
return(XmlConvertEx.XPathRound(n));
}