Re: isnanl, printf, and non-IEEE values

[John Spencer]

onSun, 17 Jun 2012 16:00:13 -0700 Paul Eggert wrote

> On 06/17/2012 03:41 PM, Rich Felker wrote:
> >  No program I know of reads long double directly from binary files.

> 'od -tfL' does.

it was already discussed that "GNU od" does, but it can be easily fixed there.

its not the job of the libc to make broken code happy.

i dont think its a good idea to make thousands of correct programs slower, just 
that GNU guys dont have to fix one program.


>  I'm sure there are others.  It's pretty
> common to save binary data into files and restore it later.

there's no problem in saving a correct float into a file and restore it.
floats generated in a correct program will have a correct float representation, 
and thus not invoke UB when restoring the value.

--JS