/// <summary>
/// Scans the number.
/// </summary>
/// <returns>Token containing number.</returns>
public StiToken ScanNumber()
{
int posStart = positionInText;
bool isFloat = false;
while (positionInText != Text.Length && Char.IsDigit(Text[positionInText]))
{
positionInText++;
}
if (positionInText != Text.Length && Text[positionInText] == '.' &&
positionInText + 1 != Text.Length && Char.IsDigit(Text[positionInText + 1]))
{
positionInText++;
while (positionInText != Text.Length && Char.IsDigit(Text[positionInText]))
{
positionInText++;
}
isFloat = true;
}
string nm = BaseText.Substring(posStart, positionInText - posStart);
if (isFloat)
{
var nfi = new NumberFormatInfo
{
CurrencyDecimalSeparator = "."
};
return(new StiToken(StiTokenType.Value, posStart, positionInText - posStart,
double.Parse(nm, nfi)));
}
else
{
string valueStr = nm;
try
{
ulong value = ulong.Parse(valueStr);
return(new StiToken(StiTokenType.Value, posStart, positionInText - posStart,
value));
}
catch (Exception e)
{
if (e is OverflowException || e is FormatException)
{
return(new StiToken(StiTokenType.Value, posStart, positionInText - posStart, valueStr));
}
else
{
throw;
}
}
}
}
