inline void validatePowerResult(double x, double result, Executer &executer)
{
if (std::isnan(result)) {
throw RunError {"domain error (non-integer exponent)", executer.currentOffset()};
} else if (result == HUGE_VAL) {
if (x == 0) {
throw RunError {"divide by zero", executer.currentOffset()};
} else {
throw RunError {"overflow", executer.currentOffset()};
}
}
}
void executeSqr(Executer &executer)
{
auto argument = executer.topDbl();
if (argument < 0) {
throw RunError {"square root of negative number", executer.currentOffset()};
}
executer.setTop(std::sqrt(argument));
}
void executeRndInt(Executer &executer)
{
auto argument = executer.topInt();
if (argument <= 0) {
throw RunError {"random function on zero or negative number", executer.currentOffset()};
}
executer.setTop(executer.getRandomNumber(argument));
}
void executeLog(Executer &executer)
{
auto argument = executer.topDbl();
if (argument <= 0) {
throw RunError {"logarithm of non-positive number", executer.currentOffset()};
}
executer.setTop(std::log(argument));
}
void checkDivideByZero(Executer &executer, T rhs)
{
if (rhs == 0) {
throw RunError {"divide by zero", executer.currentOffset()};
}
}