bool CCalculator::SetFunction(const std::string & fnId, const std::string & varId)
{
if (IsVarExist(fnId) || IsFunctionExist(fnId) || !IsVarExist(varId) || !IsNameCorrect(fnId))
{
return false;
}
SFunctionData fnInfo;
fnInfo.firstOperand = varId;
m_functions.insert(make_pair(fnId, fnInfo));
CalculateFunctionValue(fnId);
return true;
}
bool CCalculator::SetVar(const std::string & var)
{
if (!IsNameCorrect(var) || IsFunctionExist(var) || IsVarExist(var))
{
return false;
}
m_variables.insert({ var, std::numeric_limits<double>::quiet_NaN() });
return true;
}
void ParseEngine::RegisterVar(IParseVar * parseVar)
{
if(IsVarExist(parseVar->GetVarName()))
{
ErrorOutput("%s已存在, ParseEngine变量注册失败!", parseVar->GetVarName());
return;
}
m_ParseVars.Add(parseVar);
}
double CCalculator::GetValue(const std::string & var) const
{
if (IsFunctionExist(var))
{
return m_functions.at(var).value;;
}
if (IsVarExist(var))
{
return m_variables.at(var);
}
return std::numeric_limits<double>::quiet_NaN();
}
bool CCalculator::LetVarValue(const std::string & firstVar, const std::string & secondValue)
{
if (secondValue.empty())
{
return false;
}
if (!IsVarExist(firstVar))
{
if (!SetVar(firstVar))
{
return false;
}
}
m_variables[firstVar] = GetValue(secondValue);
if (m_variables[firstVar] != m_variables[firstVar])
{
char *end = nullptr;
auto value = strtod(secondValue.c_str(), &end);
if (*end == '\0')
{
m_variables[firstVar] = std::atof(secondValue.c_str());
}
else
{
return false;
}
}
for (auto func : m_functions)
{
if (func.second.firstOperand == firstVar || func.second.secondOperand == firstVar)
{
CalculateFunctionValue(func.first);
}
}
return true;
}
bool CCalculator::SetFunction(const std::string & fnId, const std::string & firstOperand,
Operator fnOperator, const std::string & secondOperand)
{
if (IsVarExist(fnId)
|| IsFunctionExist(fnId)
|| !IsNameCorrect(fnId)
|| (!IsNameCorrect(firstOperand))
|| (fnOperator == Operator::None)
|| (!IsNameCorrect(secondOperand)))
{
return false;
}
SFunctionData fnInfo;
fnInfo.firstOperand = firstOperand;
fnInfo.secondOperand = secondOperand;
fnInfo.operatorType = fnOperator;
m_functions.insert({ fnId, fnInfo });
CalculateFunctionValue(fnId);
return true;
}