Re: [vox-tech] ROT13 in vi?

[Mark Kim <mkkim@ucdavis.MAPSedu>]

That's cool, but how would you do this without creating a new program --
like, how would you pipe the text to a program (tr) then grab its
output back into vi?

-Mark

On Thu, 16 Nov 2000, Peter Jay Salzman wrote:

> On Thu, 16 Nov 2000, Mark Kim wrote:
> 
> > Actually, I wanted to know the way to do ROT-N, where N is any arbitrary
> > number, including 13.  Mike's way of doing it was using :tr but I can't
> > figure it out.  It was something like:
> > 
> >    :%tr/[A-Za-z]/[N-ZA-Mn-za-m]/g
> > 
> > but that doesn't work so obviously that wasn't it.  But it was something
> > similar.
>  
> ahhh... ok, sorry about that.   hopefully, this is payment on your answering
> my opengl questions!   :-)     rot13 is easy; it rotates by 13, so the
> following line should do it:
> 
> tr 'a-zA-Z' 'n-za-mN-ZA-M'
> 
> at this point, there are a few avenues of attack.   if you wanted to make a
> shell script out of it, (let's call it "rot13" and put it in
> /usr/local/bin).
> 
> #!/bin/sh
> tr 'a-zA-Z' 'n-za-mN-ZA-M'
> 
> GNU tr is "smart" enough to know what you mean here.  i'm pretty sure this
> wouldn't work on HPUX or some really braindead unix like ultrix.  offhand,
> i'm not sure what would happen if the leftside didn't "fit" into the
> rightside.  i'll try that after i'm done with this email.
> 
> now, when you're editing something in vi (like your mail), simply
> 
>    1. select some text using the shift/alt/ctl v mechanism.
>    2. press !
>    3. type rot13
> 
> and bingo.   there's a couple of ways to skin this particular cat.
> you could, for example, write a macro to do this.  this would be the
> prefered way to do this.
> 
> place the following line in your .vimrc:
> 
>       vmap <F1> !rot13<CR>
> 
> from now on, when you select text and press F1, the selected text will be
> rot13'd.  i never liked the vim help anyhow.  it has 2 strikes against it:
>    1. it's hard to understand
>    2. it's confusing
> so, IMHO, F1 is an ok key to remap.   :-)
> 
> 
> now, if we wanted to do rotN ... well, now we're talking about a little
> programming.  it should be easy enough to do this in C making use of the
> nice property that ASCII alpha characters increment linearly.   and then
> all the stuff i wrote above this paragraph should apply just as well to the
> rot13 case.
> 
> off the top of my head, i'm having trouble figuring out how to do it in shell 
> scripting without having 26 cases.
> 
> let me think about it.
> 
> pete
> 
> > On Wed, 15 Nov 2000, Peter Jay Salzman wrote:
> > 
> > > sorry, i couldn't resist.
> > > 
> > > the way i do it is to use the shift/alt/control V mechanism to highlight a
> > > selection of text, then use g?  (g followed by a question mark) and that
> > > converts the selected text to rot13.
> > > 
> > > ubcr gung urycf!    :)
> > > 
> > > pete
> > > 
> > > ps- :) is rot13 for :).   :)
> > > 
> > > ----------------------------------------------------------------   linux
> > > To err is human, to forgive is divine.      p@belial.ucdavis.edu     _
> > > To oink is porcine, to meow is feline.    http://www.dirac.org/p    ._.
> > > To neigh is equine to howl is lupine,                               /v\
> > > To moo is bovine to bleat is ovine.                                // \\
> > > ----------------------------------------------------------------   ^^ ^^
> > >   The best way to accelerate a win95 system is at 9.81 m/s^2       rules
> > > 
> > > On Wed, 15 Nov 2000, Mark Kim wrote:
> > > 
> > > > I asked this question before and I think Mike answered it I lost the
> > > > posting.  How do you do ROT13 in vi (actually, ROT anything)?
> > > > 
> > > > -Mark
> > > > 
> > > > PS: Yes, I know about 'g?g?' :)
> 

---
Mark K. Kim
http://www.cbreak.org/mark/
PGP key available upon request.