public static List <Token> ConvertToTokensExpression(string inputString)
{
inputString = inputString.Replace(" ", "").ToLower(); // remove spaces
List <Token> tokenExpression = new List <Token>();
int i = 0;
while (i < inputString.Length)
{
string tmp = "";
Token newToken = new Token();
if ((inputString[i] == '-' || inputString[i] == '+') &&
(i == 0 || inputString[i - 1] == '(' || OperationsManager.IsOperation(inputString[i - 1].ToString())))
{
newToken.Type = TOKEN_TYPE.UNARY_OPERATION;
}
if (inputString[i] == '(')
{
newToken.Type = TOKEN_TYPE.OPENING_BRACKET;
tmp = inputString[i++].ToString();
}
else if (inputString[i] == ')')
{
newToken.Type = TOKEN_TYPE.CLOSING_BRACKET;
tmp = inputString[i++].ToString();
}
else if (char.IsDigit(inputString[i]))
{
newToken.Type = TOKEN_TYPE.VARIABLE;
while (i != inputString.Length &&
(char.IsDigit(inputString[i]) || inputString[i] == '.' || inputString[i] == ','))
{
if (inputString[i] == '.')
{
tmp += ','; // for parsing to double in future
i++;
}
else
{
tmp += inputString[i++];
}
}
}
else if (char.IsLetter(inputString[i]))
{
while (char.IsLetter(inputString[i]))
{
tmp += inputString[i++];
if (i == inputString.Length)
{
break;
}
}
if (OperationsManager.IsOperation(tmp))
{
newToken.Type = TOKEN_TYPE.BINARY_OPERATION;
try
{
if (OperationsManager.IsUnaryOperation(tmp))
{
newToken.Type = TOKEN_TYPE.UNARY_OPERATION;
}
}
catch (Exception)
{
throw;
}
}
else if (ConstManager.IsConst(tmp))
{
newToken.Type = TOKEN_TYPE.CONST;
}
else
{
throw new Exception("Undefined operation or constant \"" + tmp + "\"");
}
}
else
{
tmp = inputString[i++].ToString();
string checkOp = tmp;
if (i != inputString.Length)
{
checkOp += inputString[i];
}
if (OperationsManager.IsBitOperation(checkOp) ||
OperationsManager.IsLogicOperation(checkOp) ||
OperationsManager.IsCompareOperation(checkOp))
{
tmp = checkOp;
i++;
}
if (OperationsManager.IsUnaryOperation(tmp))
{
newToken.Type = TOKEN_TYPE.UNARY_OPERATION;
}
}
newToken.Value = tmp;
tokenExpression.Add(newToken);
}
return(tokenExpression);
}