reference implementation bug Chongkai Zhu (12 Mar 2007 18:59 UTC)
Re: reference implementation bug Will Fitzgerald (12 Mar 2007 19:11 UTC)

Re: reference implementation bug Will Fitzgerald 12 Mar 2007 19:04 UTC

Hello,

SRFI-19 is currently unsupported, and will likely remain so.

If anyone would like to 'take over support,' please contact me.

Will Fitzgerald will dot fitzgerald at pobox dot com.

On 3/12/07, Chongkai Zhu <xxxxxx@cs.utah.edu> wrote:
> Hi,
>
> According to
> http://list.cs.brown.edu/pipermail/plt-scheme/2007-March/016761.html and
> http://list.cs.brown.edu/pipermail/plt-scheme/2007-March/016763.html, we
> found a new bug in the SRFI 19 reference implementation (that is, the PLT
> implementation).
>
> According to PLT MzScheme: Language Manual:
>
> (current-milliseconds) returns the current ``time'' in fixnum milliseconds
> (***possibly negative***). This time is based on a platform-specific
> starting date or on the machine's startup time. Since the result is a
> fixnum, the value increases only over a limited (though reasonably long)
> time.
>
> If current-milliseconds is negative, this will definitely break.
>
> Now I'm putting the following into PLT SVN:
>
> (define (tm:get-time-of-day)
>    (let* ([total-msecs (current-inexact-milliseconds)]
>           [secs (floor (/ total-msecs 1000))]
>           [msecs (floor (- total-msecs (* secs 1000)))])
>      (values (inexact->exact secs) (inexact->exact msecs))))
>
> Would SRFI-19 author please check this and provide a better accompanying
> implementation that works well with PLT v360?
>
> Chongkai
>
>

--
Will Fitzgerald
weblog: <http://www.entish.org/willwhim>