oleaut32/tests: added tests for negative fractional variant dates.
jjmckenzie51 at earthlink.net
Sat Oct 2 21:34:19 CDT 2010
On 10/2/10 7:00 PM, Jeremy Drake wrote:
> On Sat, 2 Oct 2010, James McKenzie wrote:
>> Looks like you got 'bit' by the way that a finite storage method mangles
>> floating information. There was a lengthy discussion on how to 'overcome'
>> this on the Wine-Development list a short while ago.
> No, those tests aleady account for that.
> /* When comparing floating point values we cannot expect an exact match
> * because the rounding errors depend on the exact algorithm.
> #define EQ_DOUBLE(a,b) (fabs((a)-(b)) / (1.0+fabs(a)+fabs(b))< 1e-14)
> #define EQ_FLOAT(a,b) (fabs((a)-(b)) / (1.0+fabs(a)+fabs(b))< 1e-7)
> ok_(__FILE__,line)(r == res&& (FAILED(r) || EQ_DOUBLE(out, dt)),
> "expected %x, %.16g, got %x, %.16g\n", r, dt, res,
> My understanding is that that algorithm should work to account for
> floating-point inaccuracies (though technically should be using
> DBL_EPSILON and FLT_EPSILON instead of 1e-X constants, but they're
> probably not portable enough for this project),
> I was simply bit by my own stupidity, not running my last changes against
> a Windows OS before sending my patch. This has been corrected in my try2.
Ok. I seen that. However, will this work in Wine as well might come up
as it has before.
I don't want to raise the 'noise' level and I did not see [try 2] before
making my comment, but this might be something you want to keep in mind
for the future.
Also, please be aware that my comment is based on a previous thread,
which you still might want to visit, in this mailing list/forum. It may
save you time and give you something to think about in regards to this
patch and future patches.
Note: My comment is not based on actual programming experience using
the Epsilon features and code, but rather on previous comments. I'm
just a simple programmer who tests Wine on the Mac platform.
Since I tend to remove messages as they no longer apply to my personal
habits, however I did find a pointer to the following document written
by Bruce Dawson:
This came from
It looks like you read through it, based on a review of the proposed
patch. I don't know if this can be applied to the ok() checks though.
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