/// <summary>
///
/// </summary>
/// <param name="Texts"></param>
/// <returns></returns>
private string Expand(string Text, Dictionary<string, string> Locals = null, HashSet<string> Used = null)
{
if (Used == null) Used = new HashSet<string>();
string Output = "";
var Tokens = new CTokenReader(new CTokenizer(Text, TokenizeSpaces: true).Tokenize());
Tokens.MoveNextSpace();
while (Tokens.HasMore)
{
bool Stringify = false;
if (Locals != null && Tokens.Current.Raw == "##")
{
Tokens.MoveNextSpace();
}
if (Tokens.Current.Raw == "#")
{
Tokens.MoveNextSpace();
if (Tokens.Current.Type == CTokenType.Identifier)
{
Stringify = true;
}
else
{
Stringify = false;
Output += "#";
}
}
if (Tokens.Current.Type == CTokenType.Identifier)
{
var CurrentIdentifier = Tokens.Current.Raw;
var UpdatedIdentifier = ReplaceSimpleVariable(CurrentIdentifier);
if (UpdatedIdentifier != CurrentIdentifier)
{
Output += UpdatedIdentifier;
Tokens.MoveNextSpace();
continue;
}
switch (CurrentIdentifier)
{
case "__VA_ARGS__":
CurrentIdentifier = "...";
break;
}
if (Locals != null && Locals.ContainsKey(CurrentIdentifier))
{
CurrentIdentifier = Locals[CurrentIdentifier];
if (Stringify) CurrentIdentifier = CToken.Stringify(CurrentIdentifier);
Output += CurrentIdentifier;
Tokens.MoveNextSpace();
}
else if (!Used.Contains(CurrentIdentifier) && Context.Macros.ContainsKey(CurrentIdentifier))
{
var Macro = Context.Macros[CurrentIdentifier];
// Constant
if (Macro is MacroConstant)
{
Output += Expand(Macro.Replacement, null, new HashSet<string>(Used.Concat(new[] { CurrentIdentifier })));
Tokens.MoveNextSpace();
}
// Function
else
{
Tokens.MoveNextNoSpace();
Tokens.ExpectCurrent("(");
var MacroFunction = Context.Macros[CurrentIdentifier] as MacroFunction;
if (MacroFunction == null)
{
throw (new Exception("Trying to call a non-function macro"));
}
//Console.WriteLine(":: {0} :: ", Text);
var Parameters = ParseParameterList(Tokens, JustIdentifiers: false);
for (int n = 0; n < Parameters.Length; n++)
{
//Console.WriteLine(" {0}", Parameters[n]);
Parameters[n] = Expand(Parameters[n], Locals, Used);
//Console.WriteLine(" -> {0}", Parameters[n]);
}
var Map = MapFunctionParameters(MacroFunction.Parameters, Parameters);
//foreach (var Item in Map) Console.WriteLine("{0} -> {1}", Item.Key, Item.Value);
Output += Expand(MacroFunction.Replacement, Map, new HashSet<string>(new[] { CurrentIdentifier }));
}
}
else
{
Output += CurrentIdentifier;
Tokens.MoveNextSpace();
}
}
else
{
Output += Tokens.Current.Raw;
Tokens.MoveNextSpace();
}
}
return Output;
}
public int EvaluateExpressionUnary(CTokenReader Tokens)
{
switch (Tokens.Current.Type)
{
case CTokenType.Char:
{
var Value = (int)Tokens.Current.GetCharValue();
Tokens.MoveNextNoSpace();
return Value;
}
case CTokenType.Integer:
{
var Value = (int)Tokens.Current.GetLongValue();
Tokens.MoveNextNoSpace();
return Value;
}
case CTokenType.Float:
{
var Value = (float)Tokens.Current.GetDoubleValue();
Tokens.MoveNextNoSpace();
return (int)Value;
}
case CTokenType.Identifier:
{
if (Tokens.Current.Raw == "defined")
{
Tokens.MoveNextNoSpace();
var Result = IsDefinedExpression(Tokens);
//Console.WriteLine(Result);
return Result ? 1 : 0;
}
Macro ValueMacro;
string ValueString = "";
int ValueInt = 0;
if (Macros.TryGetValue(Tokens.Current.Raw, out ValueMacro))
{
ValueString = ValueMacro.Replacement;
}
int.TryParse(ValueString, out ValueInt);
Tokens.MoveNextNoSpace();
return ValueInt;
}
case CTokenType.Operator:
switch (Tokens.Current.Raw)
{
case "(":
{
Tokens.MoveNextNoSpace();
int Result = EvaluateExpression(Tokens);
Tokens.ExpectCurrent(")");
Tokens.MoveNextNoSpace();
return Result;
}
case "-":
case "!":
case "+":
{
var Operator = Tokens.Current.Raw;
Tokens.MoveNextNoSpace();
return UnaryOperation(Operator, EvaluateExpressionUnary(Tokens));
}
default:
Console.Error.WriteLine("Line: {0}", Tokens);
throw (new NotImplementedException(String.Format("Unknown preprocessor unary operator : {0}", Tokens.Current.Raw)));
}
default:
{
ShowLine(Tokens.Current);
throw (new NotImplementedException(String.Format("Can't handle {0}", Tokens.Current)));
}
}
}
public bool IsDefinedExpression(CTokenReader Tokens)
{
if (Tokens.Current.Raw == "(")
{
Tokens.MoveNextNoSpace();
var Result = IsDefinedExpression(Tokens);
Tokens.ExpectCurrent(")");
Tokens.MoveNextNoSpace();
return Result;
}
if (Tokens.Current.Type != CTokenType.Identifier) throw (new InvalidOperationException("Error!"));
var Identifier = Tokens.Current.Raw;
Tokens.MoveNextNoSpace();
//Console.WriteLine("IsDefined: {0}", Identifier);
return Macros.ContainsKey(Identifier);
}
/// <summary>
///
/// </summary>
/// <param name="Context"></param>
/// <returns></returns>
public int EvaluateExpressionTernary(CTokenReader Tokens)
{
// TODO:
var Left = EvaluateExpressionLogicalOr(Tokens);
var Current = Tokens.Current.Raw;
if (Current == "?")
{
Tokens.MoveNextNoSpace();
var TrueCond = EvaluateExpression(Tokens);
Tokens.ExpectCurrent(":");
Tokens.MoveNextNoSpace();
var FalseCond = EvaluateExpressionTernary(Tokens);
Left = TrinaryOperation(Left, TrueCond, FalseCond);
}
return Left;
}
