@Override
final long divide(DecimalArithmetic arithmetic, long uDecimalDividend, long uDecimalDivisor) {
throw new ArithmeticException(
"Division by zero: "
+ arithmetic.toString(uDecimalDividend)
+ " / "
+ arithmetic.toString(uDecimalDivisor));
}
/**
* Returns the special division case if it is one and null otherwise.
*
* @param arithmetic the arithmetic object
* @param uDecimalDividend the dividend
* @param uDecimalDivisor the divisor
* @return the special case if it is one and null otherwise
*/
static final SpecialDivisionResult getFor(
DecimalArithmetic arithmetic, long uDecimalDividend, long uDecimalDivisor) {
// NOTE: this must be the first case because 0/0 must also throw an
// exception!
if (uDecimalDivisor == 0) {
return DIVISOR_IS_ZERO;
}
if (uDecimalDividend == 0) {
return DIVIDEND_IS_ZERO;
}
final long one = arithmetic.one();
if (uDecimalDivisor == one) {
return DIVISOR_IS_ONE;
}
if (uDecimalDivisor == -one) {
return DIVISOR_IS_MINUS_ONE;
}
if (uDecimalDividend == uDecimalDivisor) {
return DIVISOR_EQUALS_DIVIDEND;
}
if (uDecimalDividend == -uDecimalDivisor) {
return DIVISOR_EQUALS_MINUS_DIVIDEND;
}
return null;
}
@Override
final long divide(DecimalArithmetic arithmetic, long uDecimalDividend, long uDecimalDivisor) {
return -arithmetic.one();
}
@Override
final long divide(DecimalArithmetic arithmetic, long uDecimalDividend, long uDecimalDivisor) {
return arithmetic.negate(uDecimalDividend); // we must go through
// arithmetic because
// overflow is possible
}