Le 12/01/2014 14:57, Thomas Neidhart a écrit : > Hi, > > in MATH-1070 we have discovered that calling Precision.round(x, y) > behaves differently for float and double values when the value to be > rounded is negative zero: > > Precision.round(-0.0d, 0) = 0.0 > Precision.round(-0.0f, 0) = -0.0 > > The reason being that in the double case, the value is converted to a > BigDecimal, which loses the sign in this case, see > http://docs.oracle.com/javase/7/docs/api/java/math/BigDecimal.html#BigDecimal%28java.lang.String%29. > > I could not find anything related to the IEEE standard for rounding > numbers for this case. Looking at octave and python, there the sign is > kept and this would also be a reasonable behavior imho. > > Thus I would propose to add a special case for this to the > Precision.round method.
This sounds reasonable to me. Luc > > Thomas > > --------------------------------------------------------------------- > To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org > For additional commands, e-mail: dev-h...@commons.apache.org > > > --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org For additional commands, e-mail: dev-h...@commons.apache.org
