MESSAGE
| DATE | 2012-02-25 |
| FROM | Ruben Safir
|
| SUBJECT | Re: [NYLXS - HANGOUT] Re: c++ question about decimals
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On Fri, Feb 24, 2012 at 09:33:14AM -0500, Paul Robert Marino wrote:
> actually after looking into this further what i really need to do is
> grab just the remainder of the result of dividing 2 numbers I think
> fmod is the answer im looking for
>
What you have to remember is that the conversion from ints to floats is
OK but floats to a smaller digit has this long list of possible
behaviors and some are underfined.
if you want the remainder, the mod opertator is extremely useful and I
use it for psuedorandom generation, but you need to make sure everything
is a float of appropriate size.
Ruben
>
> On Fri, Feb 24, 2012 at 12:48 AM, Paul Robert Marino
> wrote:
> > my C programmings a little rusty and i could use some help
> > im working on a patch for keepalived i have to modify a portion of the
> > code that type casts several variables as a unsigned long however I
> > need to change it to an equivalent the will store it with a decimal
> > with 2 points of precision, and if possible wont change how other
> > parts of the code use the same functions with whole numbers does any
> > one have any suggestions.
> >
> > by the way in case any one is wondering im working on implementing
> > centisecond (hundredth) of a second intervals for VRRP per the RFC for
> > VRRPv3 http://tools.ietf.org/html/rfc5798
> > so far its going well but there are a few points in the code that are
> > doing crazy things like setting a sleep timer to 0 seconds which is
> > what I'm trying to fix now. that being said the rest of the patch
> > works great i was able to cut my interface failover times in nearly
> > down from 8 to less than 3 seconds total.
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