private void ProcessValue(LinkedList <LexemeContainer> list, Func <Lexeme, double, double, double> processFunc, params Lexeme[] lexemes)
{
var current = list.First;
while (true)
{
var value = current.Value;
if (!lexemes.Contains(value.Lexeme))
{
current = current.Next;
if (current == null)
{
break;
}
continue;
}
var rvalue = GetOperandValue(current.Previous.Value);
var lvalue = GetOperandValue(current.Next.Value);
var result = processFunc(value.Lexeme, rvalue, lvalue);
var newValue = new LexemeContainer(Lexeme.DOUBLE, result.ToString());
var prev = current.Previous.Previous;
var next = current.Next.Next;
var linkedList = current.List;
linkedList.Remove(current.Next);
linkedList.Remove(current.Previous);
linkedList.Remove(current);
if (prev != null)
{
linkedList.AddAfter(prev, newValue);
}
else
{
linkedList.AddFirst(newValue);
}
current = next;
if (current == null)
{
break;
}
}
}
private double GetOperandValue(LexemeContainer lexeme)
{
if (lexeme.Lexeme == Lexeme.VAR)
{
if (_variables.TryGetValue(lexeme.Value, out var value))
{
return(value);
}
return(0);
}
if (lexeme.Lexeme == Lexeme.INT)
{
return(Convert.ToInt32(lexeme.Value, 8));
}
if (lexeme.Lexeme == Lexeme.DOUBLE)
{
return(double.Parse(lexeme.Value));
}
if (lexeme.Lexeme == Lexeme.SIN)
{
var contentValue = GetOperandValue(lexeme.FuncContent);
return(Math.Sin(contentValue));
}
if (lexeme.Lexeme == Lexeme.COS)
{
var contentValue = GetOperandValue(lexeme.FuncContent);
return(Math.Cos(contentValue));
}
if (lexeme.Lexeme == Lexeme.ABS)
{
var contentValue = GetOperandValue(lexeme.FuncContent);
return(Math.Abs(contentValue));
}
throw new Exception("Can't get operand value for lexeme " + lexeme.Lexeme);
}