Reviewer needed: 6282196 There should be Math.mod(number, modulo) methods

Roger Riggs Roger.Riggs at oracle.com
Tue Apr 17 14:50:31 UTC 2012


I'm not sure have all the history around the Math vs StrictMath distinction.
There are many cross references between Math and StrictMath for common
functions, for example, ulp, getExponent, copySign, etc.
The distinction is clearer for floating point operations than for 
int/log computations.

Roger


On 04/16/2012 05:27 PM, Alex Lam S.L. wrote:
> Hi there,
>
> Sorry if this has been asked before, but I am curious as to why the
> newer methods in StrictMath (including addExact etc.) are now
> delegating to methods in Math.
>
> Looking at the other static methods, they seem to be going in the
> opposite direction, i.e. Math methods calling equivalent methods in
> StrictMath.
>
>
> Thanks,
> Alex.
>
>
>
> On Mon, Apr 16, 2012 at 10:08 PM, Roger Riggs<Roger.Riggs at oracle.com>  wrote:
>> Hi,
>>
>> I've corrected a number of issues raised with javadoc in java.lang.Math
>> and java.lang.StrictMath.  The updated webrev is:
>>   http://cr.openjdk.java.net/~rriggs/6282196.2/
>>
>> Please review.
>>
>> Thanks, Roger
>>
>>
>>
>> On 03/05/2012 08:38 AM, Roger Riggs wrote:
>>> CR 6282196 There should be Math.mod(number, modulo) methods
>>>   http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6282196
>>>
>>> Requests that floor and modulus methods be provided for primitive types.
>>> Floor division is pretty straight-forward, rounding toward minus infinity.
>>> For modulus of int and long, the sign and range follow  the exiting floor
>>> method
>>> in java.util.Math and satisfy the relation that mod(x, y) = (x -
>>> floorDiv(x, y) * y).
>>>




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