public static bool TryParse(string value, out ConstFunction func)
{
long outL;
if (long.TryParse(value, out outL))
{
func = new ConstFunction(outL, FunctionType.Long);
return(true);
}
double outD;
value = value.Replace('.', CultureInfo.CurrentCulture.NumberFormat.NumberDecimalSeparator[0]);
value = value.Replace(',', CultureInfo.CurrentCulture.NumberFormat.NumberDecimalSeparator[0]);
if (double.TryParse(value, out outD))
{
func = new ConstFunction(outD, FunctionType.Double);
return(true);
}
func = null;
return(false);
}
public static IFunction GenerateFunction(string src, IDictionary <string, IFunction> knownVars, out ErrorSyntax error)
{
error = ErrorSyntax.None;
#region ClearSrc
if (EmptySrc(src, out error))
{
return(null);
}
src = new string((from ch in src where (Operators.Contains(ch) || Numbers.Contains(ch) || Letters.Contains(ch)) select ch).ToArray());
if (EmptySrc(src, out error))
{
return(null);
}
#endregion
#region SeparateSrcInArgs
ArrayList args = new ArrayList();
int startArgIndex = 0;
for (int i = 0; i < src.Length; i++)
{
int operatorIndex = Operators.IndexOf(src[i]);
if (operatorIndex > -1)
{
if (startArgIndex != i)
{
if (args.Count > 0 && args [args.Count - 1].Equals(Operation.CloseBracket))
{
args.Add(Operation.Multiply);
}
args.Add(src.Substring(startArgIndex, i - startArgIndex));
if ((Operation)operatorIndex == Operation.OpenBracket)
{
args.Add(Operation.Multiply);
}
}
else
{
if ((Operation)operatorIndex == Operation.OpenBracket && args.Count > 0 && args [args.Count - 1].Equals(Operation.CloseBracket))
{
args.Add(Operation.Multiply);
}
}
args.Add((Operation)operatorIndex);
startArgIndex = i + 1;
continue;
}
if (i == src.Length - 1)
{
i++;
if (args.Count > 0 && args[args.Count - 1].Equals(Operation.CloseBracket))
{
args.Add(Operation.Multiply);
}
args.Add(src.Substring(startArgIndex, i - startArgIndex));
break;
}
}
#endregion
#region FindSimpleFunctions
for (int i = args.Count - 1; i > -1; i--)
{
if (args[i] is string)
{
var name = (string)args [i];
ConstFunction cFunc;
if (ConstFunction.TryParse(name, out cFunc))
{
args[i] = cFunc;
continue;
}
IFunction func;
var knownFunc = knownVars.TryGetValue(name, out func);
if (knownFunc)
{
if (func is ArgumentableFunctionsBase)
{
int closeIndex = FindCloseBracket(args, i + 2);
CollapseArgumentFunctions(args, i + 2, ref closeIndex, out error);
if (error != ErrorSyntax.None)
{
return(null);
}
var Range = args.GetRange(i + 3, closeIndex - i - 3).ToArray();
var no = new ArgumentableFunctionsRuntime((ArgumentableFunctionsBase)func, (from x in Range select(IFunction) x).ToArray());
args.RemoveRange(i, closeIndex + 1 - i);
args.Insert(i, no);
}
if (func is NonargumentableFunction)
{
args [i] = func;
}
}
}
}
#endregion
#region SetFuncsArgs
if (args.Count > 2 && args[0] is string && args[1].Equals(Operation.Multiply) && args[2].Equals(Operation.OpenBracket))
{
int closeBracketInd = FindCloseBracket(args, 2);
if (closeBracketInd < 0)
{
error = ErrorSyntax.NotFoundCloseBracket;
return(null);
}
string[] funcArgsNames = new string[(closeBracketInd - 2) >> 1];
if (funcArgsNames.Length < 1)
{
error = ErrorSyntax.EmptyArgsForFunction;
return(null);
}
int counter = 0;
for (int i = 3; i < closeBracketInd; i += 2)
{
if (!(args[i] is string || args[i] is IFunction))
{
error = ErrorSyntax.InvalidArgsStruct;
return(null);
}
funcArgsNames[counter] = /*(string)*/ (args[i] is string?(string)args[i] : ((IFunction)args[i]).Name);
counter++;
}
var argumentableFunc = new ArgumentableFunctionsBase((string)args[0], null, funcArgsNames);
foreach (var argName in funcArgsNames)
{
var argFunc = new ArgumentFunction(argName, argumentableFunc);
for (int i = 0; i < args.Count; i++)
{
if (args[i].Equals(argName) || (args[i] is IFunction && ((IFunction)args[i]).Name == argName))
{
args[i] = argFunc;
}
}
}
args.RemoveRange(0, closeBracketInd + 1);
args.Insert(0, argumentableFunc);
}
#endregion
#region CollapseAllInOneFunction
var count = args.Count - 1;
CollapseArray(args, 0, ref count, out error);
if (error != ErrorSyntax.None)
{
return(null);
}
#endregion
#region SetNameForFinalFunction
IFunction finalFunction = null;
if (args[0] is ArgumentableFunctionsBase)
{
((ArgumentableFunctionsBase)args[0]).CalcFunction = (IFunction)args[2];
finalFunction = (IFunction)args[0];
}
else
if (args.Count == 3)
{
if (args[1].Equals(Operation.Equal))
{
((IFunction)args[2]).Rename((args[0] is string) ? (string)args[0] : ((IFunction)args[0]).Name);
finalFunction = new NonargumentableFunction((IFunction)args[2]);
finalFunction.Rename(((IFunction)args[2]).Name);
}
}
else
{
if (args.Count == 1)
{
((IFunction)args[0]).Rename(null);
finalFunction = (IFunction)args[0];
}
}
#endregion
if (finalFunction == null)
{
error = ErrorSyntax.FunctionIsNotCollapsed;
}
return(finalFunction);
}
