BigReal rPow(const BigReal &x, const BigReal &y, size_t digits) { // x^y
DEFINEMETHODNAME;
DigitPool *pool = x.getDigitPool();
if(y.isZero()) {
return _1;
}
if(y == BIGREAL_1) {
return x;
}
if(x.isZero()) {
if(y.isNegative()) {
throwBigRealInvalidArgumentException(method, _T("x = 0 and y < 0"));
}
return pool->get0();
}
if(x.isPositive()) {
return rExp(rProd(y,rLn(x,digits+8),digits+8,pool),digits+8);
}
if(even(y)) {
return rPow(-x,y,digits);
}
if(odd(y)) {
return -rPow(-x,y,digits);
}
throwBigRealInvalidArgumentException(method, _T("x < 0 and y not integer"));
return BIGREAL_0;
}
bool VarPattern::checkPattern(const QString &pattern, const QString& dataType)
{
const int maxLength = 7;
if(pattern.isEmpty()) return false;
if(pattern.contains(" ")) return false;
QRegExp rExp("^[\\-+]?\\d+[\\.,]?\\d*$");
if(rExp.indexIn(pattern,0)!=-1) {
QString edPattern = pattern;
edPattern.replace(',','.');
bool dConvRes = false;
edPattern.toDouble(&dConvRes);
edPattern.remove(QRegExp("[\\.+]"));
if(edPattern.length()>maxLength) return false;
bool lConvRes = false;
qlonglong lValue = edPattern.toLongLong(&lConvRes);
if(dataType==VarItem::ucharType) {
if(!lConvRes) return false;
if((lValue>=-128)&&(lValue<=255)) return true;
}else if(dataType==VarItem::charType) {
if(!lConvRes) return false;
if((lValue>=-128)&&(lValue<=127)) return true;
}else if(dataType==VarItem::ushortType) {
if(!lConvRes) return false;
if((lValue>=-32768)&&(lValue<=65535)) return true;
}else if(dataType==VarItem::shortType) {
if(!lConvRes) return false;
if((lValue>=-32768)&&(lValue<=32767)) return true;
}else if(dataType==VarItem::uintType) {
if(!lConvRes) return false;
if((lValue>=-2147483648l)&&(lValue<=4294967295ul)) return true;
}else if(dataType==VarItem::intType) {
if(!lConvRes) return false;
if((lValue>=-2147483648l)&&(lValue<=2147483647l)) return true;
}else if(dataType==VarItem::ulongType) {
if(!lConvRes) return false;
if((lValue>=-2147483648l)&&(lValue<=4294967295ul)) return true;
}else if(dataType==VarItem::longType) {
if(!lConvRes) return false;
if((lValue>=-2147483648l)&&(lValue<=2147483647l)) return true;
}else if(dataType==VarItem::longLongType) {
if(!lConvRes) return false;
return true;
}else if(dataType==VarItem::floatType) {
if(dConvRes) return true;
}else if(dataType==VarItem::doubleType) {
if(dConvRes) return true;
}
}
return false;
}
