[PD] Binary - integer conversion

[Kyle Klipowicz]

Here is that c code. Maybe it's useful, maybe not.

~Kyle

On 3/16/07, David Powers <cyborgk at gmail.com> wrote:
> No way, I'm stealing it and filing for a software patent... ;-)  That
> way nobody else will ever be able to convert to and from binary...
> *insert evil laugh*
>
> ~David
>
> On 3/16/07, Kyle Klipowicz <kyleklip at gmail.com> wrote:
> > I'll try to dig up my c code and give it to you, in exchange for GPL.
> >
> > ~Kyle
> >
> > On 3/17/07, padawan12 <padawan12 at obiwannabe.co.uk> wrote:
> > > On Fri, 16 Mar 2007 13:18:12 -0600
> > > "David Powers" <cyborgk at gmail.com> wrote:
> > >
> > > > Wow I thought for sure this would be built in ... or at least a common
> > > > external.
> > >
> > > It possibly is. I'm just showing you how to do it from scratch in a way
> > > that directly follows the algorithm Kyle pointed you at.
> > >
> > > You could use << and >> to rotate your numbers, and other ways to do it
> > > differently. Making it extensible/flexible so that you can work on
> > > 8, 16, 32 or bigger rythmns is an important consideration, and you
> > > usualy end up using lists to do that or adopt a fixed width approach.
> > >
> > > > I guess speed is the issue here for me, rather than the ability to
> > > > convert per se.
> > >
> > > The binary representation of beats has come up before, several times and
> > > although it is seductive as an apparently efficient data structure it
> > > has a bunch of its own pitfalls and weaknesses that I'm sure you will have
> > > fun discovering :) As for speed, I don't think the conversion stage is
> > > where you will gain much opimisation anyway if your premise is to save
> > > cycles by doing bitwise transformations on integers.
> > >
> > > > This would be a good reason to write my first external
> > > > I guess.
> > >
> > > Yes it would be a good task to do. It's quite trivial
> > > in C. You could make a simple and general [bit n]
> > > that returns the nth bit of a decimal int on its
> > > left inlet. To do it properly and make it maintainable
> > > perhaps some arguments for byte/word size and endiness
> > > would help.
> > >
> > > >
> > > > ~David
> > > >
> > > > On 3/16/07, Kyle Klipowicz <kyleklip at gmail.com> wrote:
> > > > > You must implement the algorithm shown in this link:
> > > > >
> > > > > http://en.wikipedia.org/wiki/Binary_numeral_system#Decimal
> > > > >
> > > > > I did that in C during that earlier mentioned summer of my K&R C
> > > > > binge. I'm not sure how tricky it would be to do in Pd.
> > > > >
> > > > > ~Kyle
> > > > >
> > > > > On 3/16/07, David Powers <cyborgk at gmail.com> wrote:
> > > > > > Hi, sorry I do know that, but it's not my question.
> > > > > >
> > > > > > In order to use the bitwise operators, I think I need to convert an
> > > > > > arbitrary string of 0's and 1's, say "00010101", into an integer, in
> > > > > > this case I think 21. Is that more clear?
> > > > > >
> > > > > > Thanks,
> > > > > > David
> > > > > >
> > > > > > On 3/16/07, Steffen <stffn at dibidut.dk> wrote:
> > > > > > >
> > > > > > > On 16/03/2007, at 18.44, David Powers wrote:
> > > > > > >
> > > > > > > > Hello,
> > > > > > > >
> > > > > > > > Is it possible to somehow convert back and forth between integer and
> > > > > > > > binary in PD?
> > > > > > > >
> > > > > > > > My idea, is to represent simple drum machine style rhythms as binary
> > > > > > > > numbers. [101010001011]. Ok, so if this were a float, it would be
> > > > > > > > trivial to do a common task and shift the rhythm left or right. I
> > > > > > > > think, that other rhythmic variations would also be quite fast to
> > > > > > > > implement using this system, you can do binary math instead of list
> > > > > > > > operations which should be much faster, I assume.
> > > > > > >
> > > > > > >
> > > > > > > I think you want to have a look at the bitwice operators &,&&,|,||,<<
> > > > > > > and >>. See also http://en.wikipedia.org/wiki/Bitwise_operation
> > > > > > >
> > > > > > > Hope this helps.
> > > > > > >
> > > > > >
> > > > > > _______________________________________________
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> > > > > >
> > > > >
> > > > >
> > > > > --
> > > > >
> > > > > http://theradioproject.com
> > > > > http://perhapsidid.blogspot.com
> > > > >
> > > > > (((())))(()()((((((((()())))()(((((((())()()())())))
> > > > > (())))))(()))))))))))))(((((((((((()()))))))))((())))
> > > > > ))(((((((((((())))())))))))))))))))__________
> > > > > _____())))))(((((((((((((()))))))))))_______
> > > > > ((((((())))))))))))((((((((000)))oOOOOOO
> > > > >
> > > >
> > > > _______________________________________________
> > > > PD-list at iem.at mailing list
> > > > UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
> > >
> > > _______________________________________________
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> > >
> >
> >
> > --
> >
> > http://theradioproject.com
> > http://perhapsidid.blogspot.com
> >
> > (((())))(()()((((((((()())))()(((((((())()()())())))
> > (())))))(()))))))))))))(((((((((((()()))))))))((())))
> > ))(((((((((((())))())))))))))))))))__________
> > _____())))))(((((((((((((()))))))))))_______
> > ((((((())))))))))))((((((((000)))oOOOOOO
> >
>


-- 

http://theradioproject.com
http://perhapsidid.blogspot.com

(((())))(()()((((((((()())))()(((((((())()()())())))
(())))))(()))))))))))))(((((((((((()()))))))))((())))
))(((((((((((())))())))))))))))))))__________
_____())))))(((((((((((((()))))))))))_______
((((((())))))))))))((((((((000)))oOOOOOO
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