Re: [xml] Getting crazy with float parsing

[Aleksey Sanin <aleksey aleksey com>]

This is the link that describes it

http://www.math.grin.edu/~stone/courses/fundamentals/IEEE-reals.html

Aleksey.


Aleksey Sanin wrote:

> Daniel,
>
> You are not turning crazy :) It is a known problem with float numbers
> that has origin in the way float numbers are stored in memory. For 
> example,
> the following program
>        float a = 0.000;
>
>        if(a == 0.00000) {
>            printf("Hello!\n");
>        }
> will probably never print "Hello!"
>
>
> Aleksey.
>
>
>
>
>
> Daniel Veillard wrote:
>
> >  Hi Bjorn,
> >
> > I have spent 2 hours on bug 80798
> >   http://bugzilla.gnome.org/show_bug.cgi?id=80798
> >
> > and I'm starting to wonder if I'm simply turning crazy.
> > I cannot get xmlXPatythStringEvalNumber to read "39413.80" as such
> > and not as 39413.800000000003 or some similary biased value, whatever
> > trick I play. Any idea ? Would trio handle this correctly (assuming 
> > the string has
> > been first checked to be of the right format) ?
> >
> > this really drive me nuts,
> >
> > Daniel
>
>
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