/// <summary>
/// a+b -> a+b
/// a*b -> ?? cas particulier
/// a+b*c -> a+(b*c)
/// a*b+c*d -> (a*b)+(c*d)
/// </summary>
/// <param name="execResult"></param>
/// <param name="exprCalculation"></param>
/// <param name="listExprExecBase"></param>
/// <param name="listCalcAdd"></param>
/// <returns></returns>
private bool BuildCalculationExpressionWithPriority(ExecResult execResult, ExprCalculation exprCalculation, List <ExpressionExecBase> listExprExecBase, out ExprExecCalcAdd mainCalcAdd)
{
// init the main additions/sub
mainCalcAdd = new ExprExecCalcAdd();
//bool currOperatorIsAdd = true;
CalcOperatorTypeWF calcOperatorTypeWF = CalcOperatorTypeWF.Nothing;
ExprExecCalcMul exprExecCalcMul = null;
int pos = 0;
// scan operators
while (true)
{
// no more operator or operand
if (pos >= exprCalculation.ListOperator.Count)
{
// the current calc operation is an add?
if (calcOperatorTypeWF == CalcOperatorTypeWF.Plus)
{
// the current calc operation is an add/sub; add the last operand
mainCalcAdd.AddOperandNumber(listExprExecBase[pos]);
return(true);
}
else
{
// the current calc operation is an mul/div
exprExecCalcMul.AddOperandNumber(listExprExecBase[pos]);
return(true);
}
}
// todo: sur?? il y a un operande de plus que les opérateurs
if (pos >= listExprExecBase.Count)
{
break;
}
// analyze the current operator: its an add/sous or a mul/div
CalcOperatorTypeWF calcOperatorTypeWFOut;
ExprExecCalcMul exprExecCalcMulOut;
if (!BuildCalcExprProcessOperator(execResult, exprCalculation, listExprExecBase, mainCalcAdd, pos, calcOperatorTypeWF, exprExecCalcMul, out calcOperatorTypeWFOut, out exprExecCalcMulOut))
{
return(false);
}
// the workflow is updated by the function
calcOperatorTypeWF = calcOperatorTypeWFOut;
exprExecCalcMul = exprExecCalcMulOut;
// goto next operator/operand
pos++;
}
return(true);
}
/// <summary>
/// analyze the current operator: its an add/sous or a mul/div.
///
/// </summary>
/// <param name="execResult"></param>
/// <param name="exprCalculation"></param>
/// <returns></returns>
private bool BuildCalcExprProcessOperator(ExecResult execResult, ExprCalculation exprCalculation, List <ExpressionExecBase> listExprExecBase, ExprExecCalcAdd mainCalcAdd, int pos, CalcOperatorTypeWF calcOperatorTypeWFIn, ExprExecCalcMul exprExecCalcMulIn, out CalcOperatorTypeWF calcOperatorTypeWFOut, out ExprExecCalcMul exprExecCalcMulOut)
{
exprExecCalcMulOut = null;
if (exprCalculation.ListOperator[pos].Operator == OperatorCalculationCode.Plus ||
exprCalculation.ListOperator[pos].Operator == OperatorCalculationCode.Minus)
{
// manage the previous case, exp: 2*3+4 -> (2*3)+4 finish the 2*3 mul expr and continue the addition
if (calcOperatorTypeWFIn == CalcOperatorTypeWF.Mul)
{
// add the last operand to the mul expr
exprExecCalcMulIn.AddOperandNumber(listExprExecBase[pos]);
exprExecCalcMulOut = exprExecCalcMulIn;
// now its an addition expression
calcOperatorTypeWFOut = CalcOperatorTypeWF.Plus;
//mainCalcAdd.AddOperandNumber(listExprExecBase[pos]);
mainCalcAdd.ListOperator.Add(exprCalculation.ListOperator[pos]);
return(true);
}
// the operator is a + (addition)
calcOperatorTypeWFOut = CalcOperatorTypeWF.Plus;
// save the current operand value and the current operator
mainCalcAdd.AddOperandNumber(listExprExecBase[pos]);
mainCalcAdd.ListOperator.Add(exprCalculation.ListOperator[pos]);
return(true);
}
// its the first operator of the expression or the previous operator was: +/plus
if (calcOperatorTypeWFIn == CalcOperatorTypeWF.Nothing ||
calcOperatorTypeWFIn == CalcOperatorTypeWF.Plus)
{
// start a new calc expression
exprExecCalcMulOut = new ExprExecCalcMul();
exprExecCalcMulOut.AddOperandNumber(listExprExecBase[pos]);
exprExecCalcMulOut.ListOperator.Add(exprCalculation.ListOperator[pos]);
calcOperatorTypeWFOut = CalcOperatorTypeWF.Mul;
// save it in the main addition expression
mainCalcAdd.ListExprExecCalc.Add(exprExecCalcMulOut);
return(true);
}
// the previous operator is a mul
exprExecCalcMulIn.AddOperandNumber(listExprExecBase[pos]);
exprExecCalcMulIn.ListOperator.Add(exprCalculation.ListOperator[pos]);
calcOperatorTypeWFOut = CalcOperatorTypeWF.Mul;
exprExecCalcMulOut = exprExecCalcMulIn;
return(true);
}
