std::string EXParser::evaluate(std::string _expression)
{
steps.clear(); //clear previous solve steps
findAndReplaceVariables(_expression, this->variables);
try{
prepareExpression(_expression);
priorityLoop(_expression); //main calculation loop
}
catch(EXError &error){
steps.push_back(EXSolveStep(error.first, "stopped_evaluation"));
return error.first;
}
return _expression;
}
std::string EXParser::evaluate(std::string _expression)
{
steps.clear(); //clear previous solve steps
findAndReplaceVariables(_expression, this->variables);
prepareExpression(_expression);
if(!priorityLoop(_expression)) //main calculation loop
return mErrorStr;
return _expression;
}
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);
}
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;
}
