msvcrt: Make _ecvt and _fcvt work (again)

Jesse Allen the3dfxdude at
Mon Oct 16 00:09:24 CDT 2006

On 10/15/06, Stephen Moehle <smoehle at> wrote:
> Please ignore my previous patch for this. _ecvt and _fcvt needed a lot
> more work than I first realized. The existing code had at least the
> following problems: added a decimal point to the output, used scientific
> notation in the output, did not remove the leading '-' for negative
> numbers, and got the decimal point offset wrong for numbers like 0.0003.
> This patch fixes all that and very closely matches the behavior of ecvt
> an fcvt in glibc and _ecvt and _fcvt in Visual Studio 2005. I have
> dropped the changes to _gcvt. I will deal with that later.
> I have another patch that I will submit shortly that simply implements
> _ecvt and _fcvt in terms of ecvt_r and fcvt_r. I actually like that
> patch better since it is much simpler and leverages glibc better. I am
> submitting both patches because I am not sure why ecvt_r and fcvt_r were
> not used in the first place. Maybe they are not portable enough or
> something like that.

I'm not sure that this will be accepted. Portability is really
important. I think our float implementation might be wrong from what I
remember. You ought to add test cases.

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