[Openmcl-devel] Re: ipaddr-to-dotted

Gary Byers gb at clozure.com
Thu Nov 21 22:28:39 UTC 2002


I don't believe that the second comment (about giving the wrong
result) applies anymore; it was true a few versions ago (because of
confusion about whether small structures - like a "struct ipaddr" -
should be passed by value or by reference.)

I don't know whether Portable Aserve still passes NIL here; John DeSoi
might know.

The CERROR that occurs when a built-in function is redefined can
be suppressed by binding CCL:*WARN-IF-REDEFINE-KERNEL* to NIL at
the point where the definition's made, as in:

(let* ((ccl:*warn-if-redefine-kernel* nil))
  (defun ipaddr-to-dotted (...)
    ...))



On Thu, 21 Nov 2002, Kevin Rosenberg wrote:

> Hi Gary,
>
> I'm working on Portable Aserve for OpenMCL. Currently, openmcl 0.13.1
> does not allow this ccl function to be overridden without a warning. I
> assume that there is some way to disable the warning. But, even
> better, would you consider the below comments and the redefinition and
> let me know if you think that the redefinition is still needed?
>
> Thanks!
>
> --
>        Kevin Rosenberg        |  .''`.  ** Debian GNU/Linux **
>   http://b9.com/debian.html   | : :' :      The  universal
>   GPG signed and encrypted    | `. `'      Operating System
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>
>
> ; OpenMCL has a built-in ipaddr-to-dotted. But it appears that sometimes
> ; the log function is being called after the connection is closed and
> ; it causes nil to be passed to ipaddr-to-dotted. So until we have a fix,
> ; we just provide this to deal with nil values. The aserve log-request
> ; method should really check to see that it has a good value.
> ;
> ; Second reason for this: ccl:ipaddr-to-dotted gives the wrong result
> .
> #+ignore
> (defun ccl:ipaddr-to-dotted (ipaddr &key values)
>   (if (null ipaddr)
>     (if values (values 0 0 0 0) "0.0.0.0")
>     (let ((a (logand #xff (ash ipaddr -24)))
>           (b (logand #xff (ash ipaddr -16)))
>           (c (logand #xff (ash ipaddr -8)))
>           (d (logand #xff ipaddr)))
>       (if values
>         (values a b c d)
>         (format nil "~d.~d.~d.~d" a b c d)))))
>
>


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