Re: Why is Babel-C trimming its output?

[ian martins <ianxm@jhu.edu>]

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That's up to the maintainers.

If you just want to fix it on your end you could advise/replace
`org-babel-C-execute` but unfortunately there's a lot there.

On Fri, Jul 17, 2020, 1:31 PM Michaël Cadilhac <michael@cadilhac.name>
wrote:

> Thanks for the investigation Ian.  So, since the tests run just fine
> without it, and it offers an inconsistent and at times detrimental
> feature, can we consider removing it, and/or adding some options for
> that?
>
> I'd be fine having to flag my src-block with a ":verbatim t" option to
> make sure that the output is not mangled.
>
> Thoughts?
>
> On Fri, Jul 17, 2020 at 7:30 AM ian martins <ianxm@jhu.edu> wrote:
> >
> > Fortunately the author wrote tests, so we can tie the behavior of the
> code to use cases. Unfortunately all the tests pass with the call to
> org-trim removed. Also the call is there from the first commit of the file
> in git, so there's no commit message to explain.
> >
> > My guess is that it was added to clean up cases that resulted in extra
> trailing whitespace, but I dunno.
> >
> >
> > On Wed, Jul 15, 2020 at 7:12 PM Michaël Cadilhac <michael@cadilhac.name>
> wrote:
> >>
> >> Hello,
> >>
> >> Quick question here: in ob-C.el, before returning the output of a C
> >> file, there's this line:
> >>
> >> (setq results (org-trim (org-remove-indentation results)))
> >>
> >> That seems quite arbitrary; is it on purpose?  I have a C file that
> >> outputs some sort of list of formatted numbers, e.g.:
> >>
> >>   0  -17.8
> >>  40    4.4
> >>  80   26.7
> >> 120   48.9
> >>
> >> and only the first line gets trimmed, leading to a faulty output.
> >>
> >> This does not seem to be a universal thing in Babel; for instance:
> >>
> >> #+begin_src emacs-lisp :exports both :results value raw
> >>   " 0\n 1\n2\n"
> >> #+end_src
> >>
> >> …results in:
> >>
> >> #+RESULTS:
> >>  0
> >>  1
> >> 2
> >>
> >> But the same thing in C:
> >>
> >> #+begin_src C :exports both :results output raw
> >>   printf (" 0\n 1\n2\n");
> >> #+end_src
> >>
> >> …results in:
> >> #+RESULTS:
> >> 0
> >>  1
> >> 2
> >>
> >> Cheers,
> >> M.
> >>
>

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