bool EXParser::evaluateFunction(std::string &_expression, const int index, EXFunctionSet::iterator fiter)
{
std::string paramExpression = isolateParenthesisExpression(_expression, index);
size_t expressionLen = paramExpression.length();
if(expressionLen == 0){
mErrorStr = "function parameter error";
return false;
}
if(!priorityLoop(paramExpression))
return false;
double value = fiter->second((double)atof(paramExpression.c_str()));
if(isInf(value)){
mErrorStr = "infinity error";
return false;
}
if(isNan(value)){
mErrorStr = "not a number error";
return false;
}
steps.push_back(EXSolveStep(fiter->first+"("+paramExpression+") -> "+dblToStr(value), ""));
_expression.replace(index-fiter->first.length(), fiter->first.length()+expressionLen+2, dblToStr(value));
return true;
}
void EXParser::evaluateParenthesis(std::string & _expression, const int index)
{
std::string tempExpression = isolateParenthesisExpression(_expression, index);
size_t expressionLen = tempExpression.length();
priorityOperatorLoop(tempExpression);
_expression.replace(index, expressionLen+2, tempExpression);
}
bool EXParser::evaluateParenthesis(std::string & _expression, const int index)
{
std::string tempExpression = isolateParenthesisExpression(_expression, index);
size_t expressionLen = tempExpression.length();
if(!priorityOperatorLoop(tempExpression))
return false;
_expression.replace(index, expressionLen+2, tempExpression);
return true;
}
void EXParser::evaluateFormula(std::string &_expression, const int index, EXFormulaSet::iterator foiter)
{
EXVariableSet formulaVariables;
std::vector<std::string> formulaVariableNames, formulaVariableValues;
std::string formulaParameters = isolateParenthesisExpression(_expression, index),
formulaExpression = foiter->second, token;
int formulaParamLen = formulaParameters.length();
priorityLoop(formulaParameters);
splitString(formulaVariableNames, foiter->third);
splitString(formulaVariableValues, formulaParameters);
if(formulaVariableNames.size()!=formulaVariableValues.size()){
throw EXError("formula_parameter_error", ErrorIndex::FORMULA_PARAMETER_ERROR);
}
for(int i=0; i<formulaVariableNames.size(); i++){
formulaVariables.push_back(EXVariable(formulaVariableNames.at(i), atof(formulaVariableValues.at(i).c_str())));
}
findAndReplaceVariables(formulaExpression, formulaVariables);
_expression.replace(index-foiter->first.length(), foiter->first.length()+formulaParamLen+2, formulaExpression);
}
void EXParser::evaluateFunction(std::string &_expression, const int index, EXFunctionSet::iterator fiter)
{
std::string paramExpression = isolateParenthesisExpression(_expression, index);
size_t expressionLen = paramExpression.length();
if(expressionLen == 0){
throw EXError("function_parameter_error", ErrorIndex::FUNCTION_PARAMETER_ERROR);
}
priorityLoop(paramExpression);
double value = fiter->second((double)atof(paramExpression.c_str()));
if(isInf(value)){
throw EXError("infinity_error", ErrorIndex::INFINITY_ERROR);
}
if(isNan(value)){
throw EXError("not_a_number", ErrorIndex::NAN_ERROR);
}
steps.push_back(EXSolveStep(fiter->first+"("+paramExpression+") -> "+dblToStr(value), ""));
_expression.replace(index-fiter->first.length(), fiter->first.length()+expressionLen+2, dblToStr(value));
}
bool EXParser::evaluateFormula(std::string &_expression, const int index, EXFormulaSet::iterator foiter)
{
EXVariableSet formulaVariables;
std::vector<std::string> formulaVariableNames, formulaVariableValues;
std::string formulaParameters = isolateParenthesisExpression(_expression, index),
formulaExpression = foiter->second, token;
int formulaParamLen = formulaParameters.length();
priorityLoop(formulaParameters);
splitString(formulaVariableNames, foiter->third);
splitString(formulaVariableValues, formulaParameters);
if(formulaVariableNames.size()!=formulaVariableValues.size()){
mErrorStr = "formula parameter error";
return false;
}
for(unsigned int i=0; i<formulaVariableNames.size(); i++){
formulaVariables.push_back(EXVariable(formulaVariableNames.at(i), atof(formulaVariableValues.at(i).c_str())));
}
findAndReplaceVariables(formulaExpression, formulaVariables);
_expression.replace(index-foiter->first.length(), foiter->first.length()+formulaParamLen+2, formulaExpression);
return true;
}
