Hi,
I was trying to run all checks on commons-number and found findbug is
failing in Precision.java[544] FE_FLOATING_POINT_EQUALITY
{code}
case BigDecimal.ROUND_HALF_EVEN : {
double fraction = unscaled - Math.floor(unscaled);
if (fraction > 0.5) {
unscaled = Math.ceil(unscaled);
} else if (fraction < 0.5) {
unscaled = Math.floor(unscaled);
} else {
// The following equality test is intentional and needed
for rounding purposes
if (Math.floor(unscaled) / 2.0 ==
Math.floor(Math.floor(unscaled) / 2.0)) { // even // failing here.
//
unscaled = Math.floor(unscaled);
} else { // odd
unscaled = Math.ceil(unscaled);
}
}
break;
}
{code}
Error is :
Test for floating point equality in
org.apache.commons.numbers.core.Precision.roundUnscaled(double, double,
int) [Of Concern(15), High confidence]
Fix:
Replace equality check with below:
if (Math.abs((Math.floor(unscaled) / 2.0) -
(Math.floor(Math.floor(unscaled) / 2.0))) < .0000001)
we have couple of similar issues in code.
Let me know if we have better alternative, else will submit code.
Regards,
Amey
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