public void getTermFromString(string input, ref TermStack TStack, ref int startPositionPointer)
{
//Console.Write("start term {0}, ", input[startPositionPointer]);
TermTypes tt;
TermAbsClass term = null;
bool isOK_Flag = false;
int tmp = startPositionPointer;
//string txt=TakePieceFromText(input,startPosition,input.Length-startPosition-1);
if (startPositionPointer < input.Length && OperatorSymbols.Contains(input[startPositionPointer]) && !isOK_Flag) //if is operator
{
//Console.WriteLine("operator {0}", input[startPositionPointer]);
tt = TermTypes.OPR;
startPositionPointer++;
if (startPositionPointer < input.Length && OperatorSymbols.Contains(input[startPositionPointer]))
{
startPositionPointer++;
}
string txt = TakePieceFromText(input, tmp, startPositionPointer - tmp);
term = OPRTerm.GetOperatorTerm(txt);
//Console.Write("{0} is done from string ({1}),",OPRTerm.GetOperatorTerm(txt).GetOperatorType, txt);
isOK_Flag = true;
}
if (startPositionPointer < input.Length && char.IsDigit(input[startPositionPointer]) && !isOK_Flag) //if a number
{
int len = 0;
bool isFloat = false;
while (startPositionPointer + len < input.Length && char.IsDigit(input[startPositionPointer + len]))
{
len++;
}
if (startPositionPointer + len < input.Length && len > 0 && input[startPositionPointer + len] == '.')
{
isFloat = true; len++;
while (startPositionPointer + len < input.Length && char.IsDigit(input[startPositionPointer + len]))
{
len++;
}
}
if (isFloat)
{
NumberFormatInfo provider = new NumberFormatInfo();
provider.CurrencyDecimalSeparator = ".";
double x = Convert.ToDouble(TakePieceFromText(input, startPositionPointer, len), provider);
term = new FLTTerm(x);
//Console.Write("FLOAT {0}, ", x);
}
else
{
long x = Convert.ToInt64(TakePieceFromText(input, startPositionPointer, len));
term = new INTTerm(x);
//Console.Write("INTEGER {0}, ", x);
}
isOK_Flag = true;
startPositionPointer += len;
}
if (startPositionPointer < input.Length && char.IsLetter(input[startPositionPointer]) && !isOK_Flag) //FNC and VAR starts with letter
{
int len = 1;
while (startPositionPointer + len < input.Length && char.IsLetter(input[startPositionPointer + len]))
{
len++;
}
if (startPositionPointer + len < input.Length && input[startPositionPointer + len] == '(') //if name is interupted with bracket - it's func
{
term = new FNCTerm(FNCType.ERROR); //todo catch function
}
else
{
uint[] debugPush = new uint[1];
//string txt=TakePieceFromText(input,startPosition,input.Length-startPosition-1);
term = new VARTerm(VARType.ERR, debugPush); //todo catch variable
}
startPositionPointer += len;
isOK_Flag = true;
}
if (startPositionPointer < input.Length && Markup.Contains(input[startPositionPointer]) && !isOK_Flag)
{
//Console.WriteLine("Markup!!");
term = new MRKTerm(Convert.ToString(input[startPositionPointer++]));
isOK_Flag = true;
}
if (!isOK_Flag)
{
throw new ParsingException(input[startPositionPointer]);
}
TStack.Push(term);
}
