------- Additional Comments From pcarlini at suse dot de 2005-07-18 09:46
-------
> Ok, I'll reformulate it and I've even simplified the input. 4.5 is exactly
> representable in double precision, regardless of the active rounding
> precision.
> It should always be 4.5. What I would like to do is to have that double
> precision input rounded to the number of digits given by .precision (1 in the
> example) using stringstreams, taking into account the rounding mode.
Certainly, the C++ standard doesn't mandate anything about the behavior in the
presence of those settings (among other things, it's C99 material): the behavior
is specified in terms of parameters to an underlying sprintf call. I seem to
understand that you want sprintf itself to take into account the rounding mode
when carrying out its own rounding. I'm not at all sure that the C standard
mandates that (i.e., I'm not at all sure that among the floating point
operations affected there is also the rounding internal to sprintf), but in
case this is a pure libc issue.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution| |INVALID
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22542
