private TExpression ReadFactor(ref TExpression last)
{
TExpression exp0 = ReadFact(ref last);
TExpression lastAux = last;
while (UL == TypeSymbol.U_Pow)
{
TExpression expNew = new TExpression();
expNew.UL = UL;
UL = LexicalUnit();
TExpression last1 = null;
TExpression exp1 = ReadFact(ref last1);
expNew.Next = lastAux.Next;
if (lastAux.Next != null)
{
lastAux.Next.Prev = expNew;
}
else
{
last = expNew;
}
lastAux.Next = exp1;
exp1.Prev = lastAux;
last1.Next = expNew;
expNew.Prev = last1;
lastAux = last1;
}
return(exp0);
}
private static void Assign(TVar v, int index, TExpression exp)
{
if (index != 0)
{
int i = 0;
TItem itemAux = v.items;
TItem lastItem = null;
while (i < index)
{
if (itemAux == null)
{
TItem newItem = new TItem {
UL = TypeSymbol.U_UnKown
};
if (lastItem == null)
{
v.items = newItem;
}
else
{
lastItem.Next = newItem;
}
lastItem = newItem;
}
else
{
lastItem = itemAux;
itemAux = itemAux.Next;
}
i++;
}
lastItem.UL = exp.UL;
lastItem.ValNB = exp.ValNB;
lastItem.ValStr = exp.ValStr;
// check if we free it outside the method
Free(ref exp);
}
else
{
FreeItems(v);
v.items = new TItem {
UL = exp.UL, ValNB = exp.ValNB, ValStr = exp.ValStr
};
//v.items.UL = exp.UL;
//v.items.ValNB = exp.ValNB;
//v.items.ValStr = exp.ValStr;
Free(ref exp);
}
}
private TExpression EvaluateInteger(TExpression exp)
{
TExpression exp0 = EvaluateExpression(exp);
if (exp0.UL != TypeSymbol.U_Cst_Int)
{
GetRuntimeError(RuntimeMessagesError.NotValid, "Integer");
}
return(exp0);
}
private bool EvaluateCondition(TExpression exp)
{
TExpression exp0 = EvaluateExpression(exp);
if (exp0.UL != TypeSymbol.U_True && exp0.UL != TypeSymbol.U_False)
{
GetRuntimeError(RuntimeMessagesError.NotValid, "Condition");
}
bool result = (exp0.UL == TypeSymbol.U_True);
Free(ref exp0);
return(result);
}
private TExpression ReadExpression(ref TExpression last)
{
TExpression exp0 = ReadTerm(ref last);
while (UL == TypeSymbol.U_Pluse || UL == TypeSymbol.U_Minus)
{
TExpression expNew = new TExpression();
expNew.UL = UL;
UL = LexicalUnit();
TExpression last1 = null;
TExpression exp1 = ReadTerm(ref last1);
last.Next = exp1;
exp1.Prev = last;
last1.Next = expNew;
expNew.Prev = last1;
expNew.Next = null; // by default
last = expNew;
}
return(exp0);
}
private TExpression ReadCTerm(ref TExpression last)
{
TExpression exp0 = ReadCFactor(ref last);
while (UL == TypeSymbol.U_And)
{
TExpression expNew = new TExpression();
expNew.UL = UL;
UL = LexicalUnit();
TExpression last1 = null;
TExpression exp1 = ReadCFactor(ref last1);
last.Next = exp1;
exp1.Prev = last;
last1.Next = expNew;
expNew.Prev = last1;
expNew.Next = null;
last = expNew;
}
return(exp0);
}
private TExpression ReadTerm(ref TExpression last)
{
TExpression exp0 = ReadFactor(ref last);
while (UL == TypeSymbol.U_IntDiv || UL == TypeSymbol.U_Multiply ||
UL == TypeSymbol.U_Division || UL == TypeSymbol.U_Mod)
{
TExpression expNew = new TExpression();
expNew.UL = UL;
UL = LexicalUnit();
TExpression last1 = null;
TExpression exp1 = ReadFactor(ref last1);
last.Next = exp1;
exp1.Prev = last;
last1.Next = expNew;
expNew.Prev = last1;
expNew.Next = null;
last = expNew;
}
return(exp0);
}
private TExpression ReadCFactor(ref TExpression last)
{
TExpression exp0 = ReadExpression(ref last);
while (UL == TypeSymbol.U_LessEqual || UL == TypeSymbol.U_LessThan ||
UL == TypeSymbol.U_GreaterEqual || UL == TypeSymbol.U_GreaterThan ||
UL == TypeSymbol.U_Equal || UL == TypeSymbol.U_NotEqual)
{
TExpression expNew = new TExpression();
expNew.UL = UL;
UL = LexicalUnit();
TExpression last1 = null;
TExpression exp1 = ReadExpression(ref last1);
last.Next = exp1;
exp1.Prev = last;
last1.Next = expNew;
expNew.Prev = last1;
expNew.Next = null;
last = expNew;
}
return(exp0);
}
private TypeSymbol ExecuteListOfInstructions(BaseInstruction linst)
{
while (linst != null)
{
if (linst.Ins is CallInstruction)
{
CallInstruction callaux = linst.Ins as CallInstruction;
UL = ExecuteCall(callaux);
if (UL == TypeSymbol.U_Return)
{
// warning but I condiered it as error;
GetRuntimeError(RuntimeMessagesError.ReturnInProcedure);
}
if (UL == TypeSymbol.U_Halt)
{
return(UL);
}
}
else if (linst.Ins is IfInstruction)
{
IfInstruction ifaux = linst.Ins as IfInstruction;
UL = ExecuteListOfInstructions((EvaluateCondition(ifaux.Cond)) ? ifaux.Ins : ifaux.InsElse);
if (UL == TypeSymbol.U_Halt || UL == TypeSymbol.U_Break ||
UL == TypeSymbol.U_Return || UL == TypeSymbol.U_Exit)
{
return(UL);
}
}
else if (linst.Ins is WhileInstruction)
{
WhileInstruction whileaux = linst.Ins as WhileInstruction;
while (EvaluateCondition(whileaux.Cond))
{
UL = ExecuteListOfInstructions(whileaux.Ins);
if (UL == TypeSymbol.U_Halt || UL == TypeSymbol.U_Return ||
UL == TypeSymbol.U_Exit)
{
return(UL);
}
if (UL == TypeSymbol.U_Break)
{
break;
}
}
}
else if (linst.Ins is ForInstruction)
{
ForInstruction foraux = linst.Ins as ForInstruction;
TExpression expB = EvaluateInteger(foraux.ExpBegin);
TExpression expE = EvaluateInteger(foraux.ExpEnd);
TExpression step = EvaluateInteger(foraux.ExpStep);
if (!foraux.IsDown)
{
Assign(foraux.V, 0, expB);
while (expB.ValNB <= expE.ValNB)
{
UL = ExecuteListOfInstructions(foraux.Ins);
if (UL == TypeSymbol.U_Halt || UL == TypeSymbol.U_Return ||
UL == TypeSymbol.U_Exit)
{
return(UL);
}
if (UL == TypeSymbol.U_Break)
{
break;
}
// expB.ValNB = expB.ValNB + 1;
expB.ValNB = expB.ValNB + step.ValNB;
Assign(foraux.V, 0, expB);
}
}
else
{
Assign(foraux.V, 0, expB);
while (expB.ValNB >= expE.ValNB)
{
UL = ExecuteListOfInstructions(foraux.Ins);
if (UL == TypeSymbol.U_Halt || UL == TypeSymbol.U_Return ||
UL == TypeSymbol.U_Exit)
{
return(UL);
}
if (UL == TypeSymbol.U_Break)
{
break;
}
// expB.ValNB = expB.ValNB + 1;
expB.ValNB = expB.ValNB - step.ValNB;
Assign(foraux.V, 0, expB);
}
}
Free(ref expB);
Free(ref expE);
Free(ref step);
}
else if (linst.Ins is DoWhileInstruction)
{
#if doc
DoWhileInstruction doaux = linst.Ins as DoWhileInstruction;
do
{
UL = ExecuteListOfInstructions(doaux.Ins);
if (UL == TypeSymbol.U_Halt || UL == TypeSymbol.U_Return ||
UL == TypeSymbol.U_Exit)
{
return(UL);
}
if (UL == TypeSymbol.U_Break)
{
break;
}
} while (EvaluateCondition(doaux.Cond));
#else
//ExecuteOneTimeLoopAtLeast(linst.Ins as TConditionBase, true);
#endif
}
else if (linst.Ins is RepeatUntilInstruction)
{
#if doc
RepeatUntilInstruction repeataux = linst.Ins as RepeatUntilInstruction;
do
{
UL = ExecuteListOfInstructions(repeataux.Ins);
if (UL == TypeSymbol.U_Halt || UL == TypeSymbol.U_Return ||
UL == TypeSymbol.U_Exit)
{
return(UL);
}
if (UL == TypeSymbol.U_Break)
{
break;
}
} while (!EvaluateCondition(repeataux.Cond));
#else
ExecuteOneTimeLoopAtLeast(linst.Ins as TConditionBase, false)
#endif
}
else if (linst.Ins is BreakInstruction)
{
return((linst.Ins as BreakInstruction).UL);
}
else if (linst.Ins is ReturnInstruction)
{
ReturnInstruction returnaux = linst.Ins as ReturnInstruction;
GReturn = returnaux;
return(TypeSymbol.U_Return);
}
else if (linst.Ins is AssignInstruction)
{
AssignInstruction assignaux = linst.Ins as AssignInstruction;
Func <TExpression, TExpression, TExpression> a = (expValue, op) =>
{
expValue.Next = op;
op.Prev = expValue;
TExpression varExpression = new TExpression {
UL = TypeSymbol.U_Var
};
varExpression.ValVar = assignaux.Var;
varExpression.Index = TExpression.CopyExpression(assignaux.index);
varExpression.Next = expValue;
expValue.Prev = varExpression;
return(EvaluateExpression(varExpression));
};
TExpression exp0;
TExpression expOperator;
if (assignaux.Exp != null) // = , += , -= , *= , /=, ^= , %=
{
exp0 = EvaluateExpression(assignaux.Exp);
if (assignaux.UL != TypeSymbol.U_Assignment) // += , -= , *= , /=, ^= , %=
{
TypeSymbol ulAux;
if (assignaux.UL == TypeSymbol.U_PluseAssigment)
{
ulAux = TypeSymbol.U_Pluse;
}
else if (assignaux.UL == TypeSymbol.U_MinusAssigment)
{
ulAux = TypeSymbol.U_Minus;
}
else if (assignaux.UL == TypeSymbol.U_MultiplyAssigment)
{
ulAux = TypeSymbol.U_Multiply;
}
else if (assignaux.UL == TypeSymbol.U_DivisionAssigment)
{
ulAux = TypeSymbol.U_Division;
}
else if (assignaux.UL == TypeSymbol.U_PowAssigment)
{
ulAux = TypeSymbol.U_Pow;
}
else //if (assignaux.UL == TypeSymbol.U_ModAssigment)
{
ulAux = TypeSymbol.U_Mod;
}
expOperator = new TExpression {
UL = ulAux
};
exp0 = EvaluateExpression(assignaux.Exp);
if ((exp0.Next != null) || (exp0.Prev != null))
{
throw new ArgumentException("This is notification for me hakam");
}
expOperator = new TExpression {
UL = ulAux
};
exp0 = EvaluateExpression(assignaux.Exp);
if ((exp0.Next != null) || (exp0.Prev != null))
{
throw new ArgumentException("This is notification for me hakam");
}
exp0 = a(exp0, expOperator);
}
}
else // ++ , --
{
exp0 = new TExpression {
UL = TypeSymbol.U_Cst_Int, ValNB = 1
};
if (assignaux.UL == TypeSymbol.U_PlusePluse)
{
expOperator = new TExpression {
UL = TypeSymbol.U_Pluse
};
}
else
{
expOperator = new TExpression {
UL = TypeSymbol.U_Minus
};
}
exp0 = a(exp0, expOperator);
}
if (assignaux.index == null)
{
Assign(assignaux.Var, 0, exp0);
}
else
{
TExpression iexp = EvaluateInteger(assignaux.index);
Assign(assignaux.Var, GiveIntWithRuntimeError(Math.Truncate(iexp.ValNB)), exp0);
Free(ref iexp);
}
Free(ref exp0);
}
else if (linst.Ins is TWrite)
{
TWrite writeAux = linst.Ins as TWrite;
TExpression exp = EvaluateExpression(writeAux.exp);
string output = "";
while (exp != null)
{
if (exp.UL == TypeSymbol.U_True)
{
output += true.ToString();
}
else if (exp.UL == TypeSymbol.U_False)
{
output += false.ToString();
}
else if (exp.UL == TypeSymbol.U_Cst_Str)
{
output += exp.ValStr;
}
else if (exp.UL == TypeSymbol.U_Cst_Real || exp.UL == TypeSymbol.U_Cst_Int)
{
output += exp.ValNB.ToString();
}
exp = exp.Next;
}
WriteEvent?.Invoke(this, new WriteEventArgs(writeAux.isLn, output, false));
Free(ref exp);
}
else if (linst.Ins is ReadInstruction)
{
ReadInstruction readAux = linst.Ins as ReadInstruction;
InputForm inputRead = new InputForm();
inputRead.ShowDialog();
string result = inputRead.Input;
TExpression expAux = new TExpression {
UL = TypeSymbol.U_Cst_Str, ValStr = result
};
try
{
expAux.ValNB = Convert.ToDouble(result);
expAux.UL = IsIntMethod(expAux.ValNB);
expAux.ValStr = "";
}
catch (FormatException)
{
}
try
{
expAux.UL = (Convert.ToBoolean(result) ? TypeSymbol.U_True : TypeSymbol.U_False);
expAux.ValStr = "";
}
catch (FormatException)
{
}
int index = 0;
if (readAux.index != null)
{
TExpression temp = EvaluateInteger(readAux.index);
index = GiveIntWithRuntimeError(Math.Truncate(temp.ValNB));
Free(ref temp);
}
Assign(readAux.V, index, expAux);
}
else
{
GetRuntimeError(RuntimeMessagesError.UnknownInstruction);
}
linst = linst.Next;
}
return(TypeSymbol.U_EOF);
}
private TExpression EvaluateExpression(TExpression exp)
{
TExpression exp0 = TExpression.CopyExpression(exp);
TExpression currexp = exp0;
while (currexp != null)
{
TypeSymbol currExpUL = currexp.UL;
if (currExpUL == TypeSymbol.U_Cst_Str || currExpUL == TypeSymbol.U_Cst_Int || currExpUL == TypeSymbol.U_Cst_Real ||
currExpUL == TypeSymbol.U_True || currExpUL == TypeSymbol.U_False)
{
currexp = currexp.Next;
}
else if (currexp.UL == TypeSymbol.U_VarProcedure)
{
CallInstruction callaux = currexp.ValCall;
UL = ExecuteCall(callaux);
if (UL != TypeSymbol.U_Return)
{
GetRuntimeError(RuntimeMessagesError.NoReturnInFunction);
}
TExpression expAux = EvaluateExpression(GReturn.Exp);
currexp.UL = expAux.UL;
currexp.ValNB = expAux.ValNB;
currexp.ValStr = expAux.ValStr;
Free(ref expAux);
}
else if (currExpUL == TypeSymbol.U_Var)
{
// if the variables has index.
int i = 1;
if (currexp.Index != null)
{
TExpression expAux = EvaluateInteger(currexp.Index);
i = GiveIntWithRuntimeError(Math.Truncate(expAux.ValNB));
Free(ref expAux);
}
TItem itemAux = currexp.ValVar.items;
while ((itemAux != null) && (i > 1))
{
i--;
itemAux = itemAux.Next;
}
if (itemAux == null)
{
currexp.UL = TypeSymbol.U_UnKown;
}
else
{
currexp.UL = itemAux.UL;
currexp.ValNB = itemAux.ValNB;
currexp.ValStr = itemAux.ValStr;
}
}
// the functions that take one parameter.
else if (currExpUL == TypeSymbol.U_Not || currExpUL == TypeSymbol.U_UnaryPluse || currExpUL == TypeSymbol.U_UnaryMinuse ||
currExpUL == TypeSymbol.U_Sin || currExpUL == TypeSymbol.U_Cos || currExpUL == TypeSymbol.U_Tg || currExpUL == TypeSymbol.U_Ln ||
currExpUL == TypeSymbol.U_Log || currExpUL == TypeSymbol.U_Exp || currExpUL == TypeSymbol.U_Sqr || currExpUL == TypeSymbol.U_Sqrt ||
currExpUL == TypeSymbol.U_Length || currExpUL == TypeSymbol.U_IntToStr || currExpUL == TypeSymbol.U_StrToInt ||
currExpUL == TypeSymbol.U_IntToHex)
{
TypeSymbol ulAux = currexp.Prev.UL;
TExpression prevExp = currexp.Prev;
Action IsInt = () =>
{
prevExp.UL = IsIntMethod(prevExp.ValNB);
};
// validation
if ((currExpUL == TypeSymbol.U_UnaryMinuse || currExpUL == TypeSymbol.U_UnaryMinuse ||
currExpUL == TypeSymbol.U_Sin || currExpUL == TypeSymbol.U_Cos || currExpUL == TypeSymbol.U_Tg ||
currExpUL == TypeSymbol.U_Ln || currExpUL == TypeSymbol.U_Log || currExpUL == TypeSymbol.U_Exp ||
currExpUL == TypeSymbol.U_Sqr || currExpUL == TypeSymbol.U_Sqrt || currExpUL == TypeSymbol.U_IntToStr) &&
(ulAux != TypeSymbol.U_Cst_Int && ulAux != TypeSymbol.U_Cst_Real))
{
GetRuntimeError(RuntimeMessagesError.InvalideType, ulAux.ToString(), currExpUL.ToString());
}
if ((currExpUL == TypeSymbol.U_Not) && (ulAux != TypeSymbol.U_True && ulAux != TypeSymbol.U_False))
{
GetRuntimeError(RuntimeMessagesError.InvalideType, ulAux.ToString(), currExpUL.ToString());
}
if ((currExpUL == TypeSymbol.U_StrToInt || currExpUL == TypeSymbol.U_Length) && ulAux != TypeSymbol.U_Cst_Str)
{
GetRuntimeError(RuntimeMessagesError.InvalideType, ulAux.ToString(), currExpUL.ToString());
}
if (currExpUL == TypeSymbol.U_IntToHex && (ulAux != TypeSymbol.U_Cst_Int))
{
GetRuntimeError(RuntimeMessagesError.InvalideType, ulAux.ToString(), currExpUL.ToString());
}
if (currExpUL == TypeSymbol.U_UnaryPluse)
{
// nothing will change
}
else if (currExpUL == TypeSymbol.U_UnaryMinuse)
{
prevExp.ValNB = -prevExp.ValNB;
}
else if (currExpUL == TypeSymbol.U_IntToHex)
{
string result = "";
int number = Convert.ToInt32(prevExp.ValNB);
if (number == 0)
{
result = "0x0";
}
else
{
string mod = "";
while (number != 0)
{
int modInt = (number % 16);
if (modInt <= 9)
{
mod = modInt.ToString();
}
else
{
mod = LexicalAnalyst.invValues[modInt].ToString();
}
result = mod + result;
number = number / 16;
}
result = "0x" + result;
}
prevExp.ValStr = result;
prevExp.ValNB = 0;
prevExp.UL = TypeSymbol.U_Cst_Str;
}
else if (currExpUL == TypeSymbol.U_Sin)
{
prevExp.ValNB = Math.Sin(prevExp.ValNB);
IsInt();
}
else if (currExpUL == TypeSymbol.U_Cos)
{
prevExp.ValNB = Math.Cos(prevExp.ValNB);
IsInt();
}
else if (currExpUL == TypeSymbol.U_Tg)
{
prevExp.ValNB = Math.Tan(prevExp.ValNB);
IsInt();
}
else if (currExpUL == TypeSymbol.U_Ln)
{
prevExp.ValNB = Math.Log(prevExp.ValNB);
IsInt();
}
else if (currExpUL == TypeSymbol.U_Log)
{
prevExp.ValNB = Math.Log10(prevExp.ValNB);
IsInt();
}
else if (currExpUL == TypeSymbol.U_Exp)
{
prevExp.ValNB = Math.Exp(prevExp.ValNB);
IsInt();
}
else if (currExpUL == TypeSymbol.U_Sqr)
{
prevExp.ValNB = Math.Pow(prevExp.ValNB, 2);
IsInt();
}
else if (currExpUL == TypeSymbol.U_Sqrt)
{
prevExp.ValNB = Math.Sqrt(prevExp.ValNB);
IsInt();
}
else if (currExpUL == TypeSymbol.U_Not)
{
prevExp.UL = (prevExp.UL == TypeSymbol.U_True) ? TypeSymbol.U_False : TypeSymbol.U_True;
}
else if (currExpUL == TypeSymbol.U_IntToStr)
{
prevExp.ValStr = prevExp.ValNB.ToString();
prevExp.UL = TypeSymbol.U_Cst_Str;
}
else if (currExpUL == TypeSymbol.U_StrToInt)
{
prevExp.ValNB = Convert.ToDouble(prevExp.ValStr);
IsInt();
}
else if (currExpUL == TypeSymbol.U_Length)
{
prevExp.ValNB = prevExp.ValStr.Length;
prevExp.UL = TypeSymbol.U_Cst_Int;
}
// Free the expressions that used
if (currexp.Next != null)
{
currexp.Next.Prev = prevExp;
}
prevExp.Next = currexp.Next;
TExpression expAux = currexp.Next;
Free(ref currexp);
currexp = expAux;
// the following statment is instead of
//currexp = currexp.Next;
}
else if (currExpUL == TypeSymbol.U_And || currExpUL == TypeSymbol.U_Or || currExpUL == TypeSymbol.U_Pluse ||
currExpUL == TypeSymbol.U_Minus || currExpUL == TypeSymbol.U_Multiply || currExpUL == TypeSymbol.U_IntDiv ||
currExpUL == TypeSymbol.U_Division || currExpUL == TypeSymbol.U_Pow || currExpUL == TypeSymbol.U_Mod ||
currExpUL == TypeSymbol.U_Equal || currExpUL == TypeSymbol.U_NotEqual || currExpUL == TypeSymbol.U_LessEqual ||
currExpUL == TypeSymbol.U_LessThan || currExpUL == TypeSymbol.U_GreaterEqual || currExpUL == TypeSymbol.U_GreaterThan)
{
TExpression prevExp = currexp.Prev;
TExpression prevPrevExp = prevExp.Prev;
Action setReal = () =>
{
if (prevPrevExp.UL != prevExp.UL)
{
prevPrevExp.UL = TypeSymbol.U_Cst_Real;
}
};
// validation 1
if ((currExpUL == TypeSymbol.U_And || currExpUL == TypeSymbol.U_Or) &&
((prevExp.UL != TypeSymbol.U_True && prevExp.UL != TypeSymbol.U_False) ||
(prevPrevExp.UL != TypeSymbol.U_True && prevPrevExp.UL != TypeSymbol.U_False)))
{
GetRuntimeError(RuntimeMessagesError.ValidType, "boolean", "And, Or");
}
if ((currExpUL == TypeSymbol.U_LessEqual || currExpUL == TypeSymbol.U_LessThan ||
currExpUL == TypeSymbol.U_GreaterEqual || currExpUL == TypeSymbol.U_GreaterThan ||
currExpUL == TypeSymbol.U_Multiply || currExpUL == TypeSymbol.U_Division ||
currExpUL == TypeSymbol.U_Mod || currExpUL == TypeSymbol.U_Pow ||
currExpUL == TypeSymbol.U_Minus) &&
((prevExp.UL != TypeSymbol.U_Cst_Int && prevExp.UL != TypeSymbol.U_Cst_Real) ||
(prevPrevExp.UL != TypeSymbol.U_Cst_Int && prevPrevExp.UL != TypeSymbol.U_Cst_Real)))
{
GetRuntimeError(RuntimeMessagesError.ValidType, "int , double", "<, <=, >=, >, *, /, -, %, ^");
}
if (currExpUL == TypeSymbol.U_IntDiv && ((prevExp.UL != TypeSymbol.U_Cst_Int) || (prevPrevExp.UL != TypeSymbol.U_Cst_Int)))
{
GetRuntimeError(RuntimeMessagesError.ValidType, "int", "div");
}
if ((currExpUL == TypeSymbol.U_Pluse) &&
((prevExp.UL != TypeSymbol.U_Cst_Int && prevExp.UL != TypeSymbol.U_Cst_Real && prevExp.UL != TypeSymbol.U_Cst_Str) ||
(prevPrevExp.UL != TypeSymbol.U_Cst_Int && prevPrevExp.UL != TypeSymbol.U_Cst_Real && prevPrevExp.UL != TypeSymbol.U_Cst_Str)))
{
GetRuntimeError(RuntimeMessagesError.ValidType, "int, double ,string", "+");
}
if (currExpUL == TypeSymbol.U_And)
{
prevPrevExp.UL = (prevPrevExp.UL == TypeSymbol.U_True && prevExp.UL == TypeSymbol.U_True) ? TypeSymbol.U_True : TypeSymbol.U_False;
}
else if (currExpUL == TypeSymbol.U_Or)
{
prevPrevExp.UL = (prevPrevExp.UL == TypeSymbol.U_True || prevExp.UL == TypeSymbol.U_True) ? TypeSymbol.U_True : TypeSymbol.U_False;
}
else if (currExpUL == TypeSymbol.U_Equal)
{
if (IsBoolean(prevExp.UL) && IsBoolean(prevPrevExp.UL))
{
prevPrevExp.UL = (prevPrevExp.UL == prevExp.UL) ? TypeSymbol.U_True : TypeSymbol.U_False;
}
else if (IsNumber(prevExp.UL) && IsNumber(prevPrevExp.UL))
{
prevPrevExp.UL = (prevPrevExp.ValNB == prevExp.ValNB) ? TypeSymbol.U_True : TypeSymbol.U_False;
}
else if (prevExp.UL == TypeSymbol.U_Cst_Str && prevPrevExp.UL == TypeSymbol.U_Cst_Str)
{
prevPrevExp.UL = (prevPrevExp.ValStr == prevExp.ValStr) ? TypeSymbol.U_True : TypeSymbol.U_False;
}
else
{
GetRuntimeError(RuntimeMessagesError.Uncompiable, "=");
}
}
else if (currExpUL == TypeSymbol.U_NotEqual)
{
if (IsBoolean(prevExp.UL) && IsBoolean(prevPrevExp.UL))
{
prevPrevExp.UL = (prevPrevExp.UL != prevExp.UL) ? TypeSymbol.U_True : TypeSymbol.U_False;
}
else if (IsNumber(prevExp.UL) && IsNumber(prevPrevExp.UL))
{
prevPrevExp.UL = (prevPrevExp.ValNB != prevExp.ValNB) ? TypeSymbol.U_True : TypeSymbol.U_False;
}
else if (prevExp.UL == TypeSymbol.U_Cst_Str && prevPrevExp.UL == TypeSymbol.U_Cst_Str)
{
prevPrevExp.UL = (prevPrevExp.ValStr != prevExp.ValStr) ? TypeSymbol.U_True : TypeSymbol.U_False;
}
else
{
GetRuntimeError(RuntimeMessagesError.Uncompiable, "=");
}
}
else if (currExpUL == TypeSymbol.U_LessEqual)
{
prevPrevExp.UL = (prevPrevExp.ValNB <= prevExp.ValNB) ? TypeSymbol.U_True : TypeSymbol.U_False;
}
else if (currExpUL == TypeSymbol.U_LessThan)
{
prevPrevExp.UL = (prevPrevExp.ValNB < prevExp.ValNB) ? TypeSymbol.U_True : TypeSymbol.U_False;
}
else if (currExpUL == TypeSymbol.U_GreaterEqual)
{
prevPrevExp.UL = (prevPrevExp.ValNB >= prevExp.ValNB) ? TypeSymbol.U_True : TypeSymbol.U_False;
}
else if (currExpUL == TypeSymbol.U_GreaterThan)
{
prevPrevExp.UL = (prevPrevExp.ValNB > prevExp.ValNB) ? TypeSymbol.U_True : TypeSymbol.U_False;
}
else if (currExpUL == TypeSymbol.U_Pluse)
{
if (prevExp.UL == TypeSymbol.U_Cst_Str && prevPrevExp.UL == TypeSymbol.U_Cst_Str)
{
prevPrevExp.ValStr += prevExp.ValStr;
}
else if (IsNumber(prevExp.UL) && IsNumber(prevPrevExp.UL))
{
prevPrevExp.ValNB += prevExp.ValNB;
setReal();
}
else
{
GetRuntimeError(RuntimeMessagesError.intStringPluse);
}
}
else if (currExpUL == TypeSymbol.U_Minus)
{
prevPrevExp.ValNB = prevPrevExp.ValNB - prevExp.ValNB;
setReal();
}
else if (currExpUL == TypeSymbol.U_Multiply)
{
prevPrevExp.ValNB = prevPrevExp.ValNB * prevExp.ValNB;
setReal();
}
else if (currExpUL == TypeSymbol.U_Division)
{
try
{
prevPrevExp.ValNB = (double)prevPrevExp.ValNB / prevExp.ValNB;
setReal();
}
catch (DivideByZeroException)
{
GetRuntimeError(RuntimeMessagesError.DivByZero);
}
}
else if (currExpUL == TypeSymbol.U_Mod)
{
try
{
prevPrevExp.ValNB %= prevExp.ValNB;
setReal();
}
catch (DivideByZeroException)
{
GetRuntimeError(RuntimeMessagesError.DivByZero);
}
}
else if (currExpUL == TypeSymbol.U_Pow)
{
prevPrevExp.ValNB = Math.Pow(prevPrevExp.ValNB, prevExp.ValNB);
setReal();
}
else if (currExpUL == TypeSymbol.U_IntDiv)
{
try
{
prevPrevExp.ValNB = GiveIntWithRuntimeError(prevPrevExp.ValNB) / GiveIntWithRuntimeError(prevExp.ValNB);
prevPrevExp.UL = TypeSymbol.U_Cst_Int;
}
catch (DivideByZeroException)
{
GetRuntimeError(RuntimeMessagesError.DivByZero);
}
}
// free the expression that used.
TExpression expAux = prevPrevExp;
if (currexp.Next != null)
{
currexp.Next.Prev = expAux;
}
expAux.Next = currexp.Next;
currexp.Prev = null; // free the currexp.Prev
Free(ref currexp);
currexp = expAux.Next;
}
else if (currExpUL == TypeSymbol.U_UnKown)
{
GetRuntimeError(RuntimeMessagesError.UnassigedVariable);
}
} // end while
return(exp0);
}
private TypeSymbol ExecuteCall(CallInstruction callaux)
{
// 1 . handle the input variables
TExpression exp0 = EvaluateExpression(callaux.Pin);
TVar varaux;
if (exp0 != null)
{
while (exp0.Next != null)
{
exp0 = exp0.Next;
}
varaux = callaux.P.PIN;
TExpression expaux;
while (varaux != null && exp0 != null)
{
expaux = exp0.Prev;
if (expaux != null) // this condition I added because of expcetion.
{
expaux.Next = null;
}
//expaux.Prev = null;
exp0.Prev = null;
Assign(varaux, 0, exp0);
Free(ref exp0);
exp0 = expaux;
varaux = (TVar)varaux.Next;
}
// error the variables in method is different from variables in call.
if (varaux != null || exp0 != null)
{
GetRuntimeError(RuntimeMessagesError.VarsDifferents, "inupt");
}
}
// 2 . Handle the output variables.
TListVar lv = callaux.Pout;
varaux = callaux.P.POut;
if (!(lv == null && varaux == null))
{
if (varaux == null)
{
GetRuntimeError(RuntimeMessagesError.VarsDifferents, "output");
}
while (lv != null && varaux != callaux.P.PIN)
{
AssignVar(varaux, lv.V);
varaux = (TVar)varaux.Next;
lv = lv.Next;
}
// error the output variables in method is different from output variables in call
if (lv != null || varaux != callaux.P.PIN)
{
GetRuntimeError(RuntimeMessagesError.VarsDifferents, "output");
}
}
// 3 . Execute the Instructions of method.
UL = ExecuteListOfInstructions(callaux.P.Linst);
// 4 . return the output vaiables from the call to the orgianl variables in the methods.
lv = callaux.Pout;
varaux = callaux.P.POut;
if (varaux == null)
{
varaux = callaux.P.PIN;
}
// 5 . return the input variables from the call to the orginal vaiables in the methods.
while (lv != null) // here there is another condition
{
AssignVar(lv.V, varaux);
varaux = (TVar)varaux.Next;
lv = lv.Next;
}
return(UL);
}
private static void Free(ref TExpression exp0)
{
exp0 = null;
}
private TExpression ReadFact(ref TExpression last)
{
if (UL == TypeSymbol.U_Cst_Int || UL == TypeSymbol.U_Cst_Real || UL == TypeSymbol.U_Cst_Str ||
UL == TypeSymbol.U_True || UL == TypeSymbol.U_False)
{
TExpression expNew = new TExpression();
expNew.UL = UL;
if (UL == TypeSymbol.U_Cst_Str)
{
expNew.ValStr = G_curr_Str;
}
else if (UL == TypeSymbol.U_Cst_Int || UL == TypeSymbol.U_Cst_Real) // the if statment i added after notce the true false.
{
expNew.ValNB = G_curr_Num;
}
// by default
expNew.Next = null;
expNew.Prev = null;
last = expNew;
UL = LexicalUnit();
return(expNew);
}
else if (UL == TypeSymbol.U_OpenParanthese)
{
UL = LexicalUnit();
TExpression expNew = ReadCondition(ref last);
if (UL != TypeSymbol.U_ClosedParanthese)
{
GetSyntaxError(WordMessagesError.NotFound, ")");
}
UL = LexicalUnit();
return(expNew);
}
else if (UL == TypeSymbol.U_Var || UL == TypeSymbol.U_VarDefine ||
UL == TypeSymbol.U_VarProcedure || UL == TypeSymbol.U_UnKown)
{
TExpression expNew = new TExpression();
// By Default
expNew.Next = null;
expNew.Prev = null;
TVar varAux = null;
ProcedureInstruction procAux = null;
TypeSymbol ulAux;
if (UL == TypeSymbol.U_VarDefine) // if the variable define
{
DefineInstruction defAux = (DefineInstruction)G_curr_ID;
expNew.UL = defAux.UL;
expNew.ValNB = defAux.ValNB;
expNew.ValStr = defAux.ValStr;
ulAux = defAux.UL;
UL = LexicalUnit();
}
else if (UL == TypeSymbol.U_UnKown) // if the variblae unknown procedure , unknown variable
{
string buffer = G_curr_Str;
UL = LexicalUnit();
if (UL == TypeSymbol.U_OpenParanthese) // if the variblae unknown procedure
{
IdentifierInstruction.AddIdentifier(buffer, ref Locals.gproc);
procAux = gProc;
gProc.IsFunc = true;
//gProc.IsDefined = false;
//gProc.PIN = null;
//gProc.POut = null;
//gproc.LVar = null;
//gProc.Linst = null;
ulAux = TypeSymbol.U_VarProcedure;
}
else // if the variblae unknown procedure , unknownvariable
{
IdentifierInstruction.AddIdentifier(buffer, ref Locals.gvar);
varAux = gVar;
ulAux = TypeSymbol.U_Var;
}
}
else // if the variable known
{
// this statment i am not sure about it
ulAux = UL;
if (ulAux == TypeSymbol.U_Var) // if the vairable known var
{
varAux = (TVar)G_curr_ID;
}
else // if the variable known procedure
{
procAux = (ProcedureInstruction)G_curr_ID;
}
UL = LexicalUnit();
}
expNew.UL = ulAux;
last = expNew;
if (ulAux == TypeSymbol.U_VarProcedure)
{
expNew.ValCall = ReadCall(procAux);
}
else if (ulAux == TypeSymbol.U_Var)
{
expNew.ValVar = varAux;
if (UL == TypeSymbol.U_OpenBracket)
{
UL = LexicalUnit();
expNew.Index = ReadExpression();
if (UL != TypeSymbol.U_ClosedBracket)
{
GetSyntaxError(WordMessagesError.NotFound, "]");
}
UL = LexicalUnit();
}
else
{
expNew.Index = null;
}
}
return(expNew);
}
else if (new TypeSymbol[] { TypeSymbol.U_Sin, TypeSymbol.U_Cos, TypeSymbol.U_Tg,
TypeSymbol.U_Ln, TypeSymbol.U_Log, TypeSymbol.U_Exp, TypeSymbol.U_Sqr, TypeSymbol.U_Sqrt,
TypeSymbol.U_Length, TypeSymbol.U_IntToStr, TypeSymbol.U_StrToInt, TypeSymbol.U_IntToHex, }.Contains(UL))
{
TExpression expNew = new TExpression();
expNew.UL = UL;
UL = LexicalUnit();
if (UL != TypeSymbol.U_OpenParanthese)
{
GetSyntaxError(WordMessagesError.NotFound, "(");
}
UL = LexicalUnit();
TExpression exp0 = ReadExpression(ref last);
last.Next = expNew;
expNew.Prev = last;
last = expNew;
if (UL != TypeSymbol.U_ClosedParanthese)
{
GetSyntaxError(WordMessagesError.NotFound, ")");
}
UL = LexicalUnit();
return(exp0);
}
else if (UL == TypeSymbol.U_Pluse || UL == TypeSymbol.U_Minus || UL == TypeSymbol.U_Not || UL == TypeSymbol.U_Complement)
{
TExpression expNew = new TExpression();
if (UL == TypeSymbol.U_Pluse)
{
expNew.UL = TypeSymbol.U_UnaryPluse;
}
else if (UL == TypeSymbol.U_Minus)
{
expNew.UL = TypeSymbol.U_UnaryMinuse;
}
else if (UL == TypeSymbol.U_Not)
{
expNew.UL = TypeSymbol.U_Not;
}
else
{
expNew.UL = TypeSymbol.U_Complement;
}
UL = LexicalUnit();
TExpression exp0 = ReadFact(ref last);
last.Next = expNew;
expNew.Prev = last;
last = expNew; // this statment i added to solve the problem that unary pluse and unary minus.
return(exp0);
}
else
{
GetSyntaxError(SyntaxMessagesError.InvalidToken, UL.ToString());
}
// this statment will never execute
// just for elminate compile time error.
return(null);
}
private TExpression ReadExpression()
{
TExpression last = null;
return(ReadExpression(ref last));
}
private CallInstruction ReadCall(ProcedureInstruction procAux)
{
CallInstruction callAux = new CallInstruction {
P = procAux
};
// Code before Modify
//callAux.P = (TProcedure)lexer.CurrID;
//if (LexicalUnit() != TypeSymbol.U_OpenParanthese)
//{
// GetSyntaxError(WordMessagesError.NotFound, "(");
//}
// Code after Modify
// callAux.P = procAux;
if (UL != TypeSymbol.U_OpenParanthese)
{
GetSyntaxError(WordMessagesError.NotFound, "(");
}
UL = LexicalUnit();
// By Default
callAux.Pin = null;
callAux.Pout = null;
if (UL == TypeSymbol.U_Input)
{
UL = LexicalUnit();
TExpression last = null;
while (true)
{
TExpression last1 = null;
TExpression exp1 = ReadExpression(ref last1);
if (callAux.Pin == null)
{
callAux.Pin = exp1;
}
else
{
last.Next = exp1;
exp1.Prev = last;
}
last = last1;
if (UL == TypeSymbol.U_ClosedParanthese || UL == TypeSymbol.U_Output)
{
break;
}
if (UL != TypeSymbol.U_Comma)
{
GetSyntaxError(WordMessagesError.NotFound, "\",\"");
}
UL = LexicalUnit();
} // end while
}
if (UL == TypeSymbol.U_Output) // this section must be Repated again ( it is not finished )
{
UL = LexicalUnit();
while (true)
{
if (UL == TypeSymbol.U_UnKown)
{
IdentifierInstruction.AddIdentifier(G_curr_Str, ref Locals.gvar);
G_curr_ID = gVar;
}
else if (UL != TypeSymbol.U_Var)
{
GetSyntaxError(WordMessagesError.NotFound, "Variable");
}
TListVar newlvar = new TListVar();
newlvar.V = (TVar)G_curr_ID;
newlvar.Next = callAux.Pout;
callAux.Pout = newlvar;
UL = LexicalUnit();
if (UL == TypeSymbol.U_ClosedParanthese)
{
break;
}
if (UL != TypeSymbol.U_Comma)
{
GetSyntaxError(WordMessagesError.NotFound, "\",\"");
}
UL = LexicalUnit();
}
}
if (UL != TypeSymbol.U_ClosedParanthese)
{
GetSyntaxError(WordMessagesError.NotFound, ")");
}
UL = LexicalUnit();
return(callAux);
}
private object HandleWrite()
{
TWrite writeAux = new TWrite();
writeAux.isLn = (UL == TypeSymbol.U_WriteLn);
if (LexicalUnit() != TypeSymbol.U_OpenParanthese)
{
GetSyntaxError(WordMessagesError.NotFound, "(");
}
UL = LexicalUnit();
// by default
writeAux.exp = null;
TExpression last = null;
while (UL != TypeSymbol.U_ClosedParanthese)
{
TExpression last0 = null;
TExpression exp0 = ReadExpression(ref last0);
if (writeAux.exp == null)
{
writeAux.exp = exp0;
}
else
{
last.Next = exp0;
exp0.Prev = last;
}
last = last0;
if (UL != TypeSymbol.U_ClosedParanthese && UL != TypeSymbol.U_Comma)
{
GetSyntaxError(WordMessagesError.NotFound, ", or )");
}
if (UL == TypeSymbol.U_Comma)
{
UL = LexicalUnit();
if (UL == TypeSymbol.U_ClosedParanthese)
{
GetSyntaxError(SyntaxMessagesError.ExpMiss, "\",\"", "\")\"");
}
}
} // end while
if (!writeAux.isLn && writeAux.exp == null)
{
warnning.Add(new WarningException(SyntaxMessagesError.NoOperation, CI, lineNumber, Locals.CurrFile.Name));
}
UL = LexicalUnit();
if (UL != TypeSymbol.U_SemiColon)
{
GetSyntaxError(SyntaxMessagesError.SemiColon);
}
UL = LexicalUnit();
return(writeAux);
}