Re: [vox-tech] ROT13 in vi?

[Peter Jay Salzman <p@belial.MAPSucdavis.edu>]

mark, it's exactly the same as you'd do with the progrm:

        vmap <F1> !tr 'a-zA-Z' 'n-za-mN-ZA-M'<CR>

why did i mention the program in the first place?  i'm not sure how to rotN
when N is an arbitrary number between 1 and 26.  the easiest thing to do
would be to write a C program to do that and reference that program in your
vim macro.

pete


On Thu, 16 Nov 2000, Mark Kim wrote:

> 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
> > 
> > naq ovatb.   gurer'f n pbhcyr bs jnlf gb fxva guvf cnegvphyne png.
> > lbh pbhyq, sbe rknzcyr, jevgr n znpeb gb qb guvf.  guvf jbhyq or gur
> > cersrerq jnl gb qb guvf.
> > 
> > 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?' :)