On Jul 3, 6:15 am, Parth <parth.malwan...@gmail.com> wrote:
> Tom, Chouser, Thanks for your responses.
>
> As of now I am doing the same thing as suggested.
> However, this tends be become painful the moment structures
> start to nest. For e.g. I am using Clojure to decode a bit
> of assembly and below is what I end up doing to see the
> values of interest in hex:
>
> user=> (decode :b32 (nth test-ops 3))
> {:inst {:prefix (), :code (199 69 248 10 0 0 0), :op :movl, :args
> [{:type :Ev-mem, :arg {:reg :ebp, :disp -8}} 10]}, :more ()}
> user=> (def r (decode :b32 (nth test-ops 3)))
> #'user/r
> user=> (map hex (get-in r [:inst :code]))
> ("c7" "45" "f8" "a" "0" "0" "0")
> user=> (hex (second (get-in r [:inst :args])))
> "a"
> user=>
>
> Basically, I need to extract each number seq or value
> individually and print it in hex for every instruction I
> decode and view.
>
> This isn't too much fun to do in the middle of a debug session :)
>
> Having something like *print-base* would be ideal IMHO
> would make scenarios like this really easy as one could
> simply do:
>
> user=> (set! *print-base* 16)
> user=> (decode :b32 (nth test-ops 3))
> {:inst {:prefix (), :code (c7 47 f8 a 0 0 0), :op :movl, :args
> [{:type :Ev-mem, :arg {:reg :ebp, :disp f8}} a]}, :more ()}
>
> In the absence of this I thought of writing a function
> that would take an arbitrary Clojure structure/coll and print
> it out in the manner like above. But then it won't
> be much different from pprint with radix support but without
> the pretty part.
>
> I suppose what I am hoping is that a feature request for
> *print-base* sort of a mechanism get considered
> for Clojure as it makes scenarios like the above very
> easy to deal with. Any chance of this being somewhere
> on the Clojue todo? :)
>
Rich,
If this is something you think would be a good addition
to Clojure I could give a shot at creating a patch for
this (with a CA of course). Please let me know.
I think rather than a generic radix support, if
we have hex, bin and octal supported, most uses
cases should be covered.
Regards,
Parth
> I will probably create a poor mans radix based print
> in the mean time for the this scenario. That should
> be an interesting exercise.
>
> Thanks,
> Parth
>
> On Jul 2, 10:58 pm, Chouser <chou...@gmail.com> wrote:
>
> > On Thu, Jul 2, 2009 at 4:51 AM, Parth
>
> > Malwankar<parth.malwan...@gmail.com> wrote:
>
> > > I frequently deal with hex and binary numbers.
> > > As of now when I need to view a list of numbers
> > > I just map a little hex function to it to translate it
> > > into a list of hex strings at the repl.
>
> > > Having something like *print-base* / *print-radix* [1] may be
> > > valuable in such a scenario
>
> > I don't think Java's built-in formatter is nearly as
> > flexible as those, but getting hex or octal strings is easy
> > enough:
>
> > user=> (format "%d" 255)
> > "255"
> > user=> (format "%o" 255)
> > "377"
> > user=> (format "%x" 255)
> > "ff"
> > user=> (format "%X" 255)
> > "FF"
>
> > --Chouser
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