Where can I read the ANSI terminal standard? - terminal

I'd thinking about creating my own Terminal Emulation library, and I'd like to start by trying to get the latest standard for ANSI terminals. I know there are a lot resources out there, but I'd like to read the actual standard if I can.
If the standard costs "a lot of money" (for me, more than $25) to acquire, what's the next best (most complete) description I can find?

I think I found what I'm looking for.
According to WikiPedia's ANSI escape code, the standard adopted was ECMA-48, the document is available at www.ecma-international.org Ecma-048.pdf

Related

Ctags - Find where a function is used in a project

Is there any good way to find where is a function being called in our codebase ?
There is a gem called Starscope (disclaimer: I am the author) which can list function calls in ruby code, among other things. It isn't perfect, since it can't handle crazy meta-programming, but it will find all the normal calls to a given function.
gem: https://rubygems.org/gems/starscope
github: https://github.com/eapache/starscope
user guide: https://github.com/eapache/starscope/blob/master/doc/USER_GUIDE.md
edit: Luc's answer is entirely accurate as far as it goes; I wrote Starscope specifically to be "Cscope for Ruby".
With ctags, no. It references functions declarations and definitions, not their uses.
Then it depends on the language.
cscope can help with C, but not with C++. With C++, you should have a look at clang based solutions : there is clang_indexer (and its many forks) (see vim-clang to integrate it in vim), but I did found a few quirks ; it seems YouCompleteMe does a few things related to code indexation (as it provides GotoImplementation/Declaration commands).
For other languages, you may have dedicated plugins. But for sure, there is always grep (and many plugins that integrates it)

customize vim with ruby scripts

Vimscript is difficult. Ruby is not quite so diffiuclt. Customizing Vim with Ruby scripts can be done, and I am trying to learn how. This is a useful presentation about it which covers the basics, but meaningful examples are scarce (and these are rather complicated), so I'm wondering if anyone with experience in this area can offer some smaller examples of Vim mappings and shortcuts written in Ruby.
As a specific example of the kind of scale I'm looking for, let's suppose I want to create section headers for my documentation or something, as in
----------------------------------------------
------------------- SECTION ------------------
----------------------------------------------
where the section name is centered in the set of hyphens, and to achieve this I visually select the word
SECTION
on it's own line, and hit leader <arbitrary keystroke>.
Counterargument: Vimscript isn't difficult, maybe a bit different; after all, much of it is modeled after Python.
I do agree that for certain, complex tasks (especially anything that requires interaction with the "outside world", be it file systems, web service calls, etc.), or stuff that benefits from library functions, a different programming language (and fortunately one can choose among powerhorses like Perl, Python, and Ruby) has undeniable benefits.
But the example task you're giving is just a simple sequence of yanking, simple string manipulation, followed by paste. There's little meat, and the interaction with the Vim buffer isn't that different when done in an integration language. That's my main point: You still have to integrate with Vim, and for that, some knowledge of Vim's structure (and that means Vimscript) is necessary.

syntax-check a VimL script

I have a sizable vim script (a .vim file, in viml syntax). I'd like to check (but not execute!) the file for simple syntax errors.
How do I accomplish this?
I just want a very rough syntax check. Something along the lines of perl -c or pyflakes.
Here is a syntax checker for VimL.
https://github.com/syngan/vim-vimlint/
I don't think (I'm relatively sure, as much as one can be) one exists. VimL is an internal language of Vim (and only Vim), and there aren't many tools developed for it.
I tried searching on vim.org and several other places, with no luck. Not suprising, because I've never heard of one either.
So you're either stuck with running the script, or switching to an outside language like Python, Perl or Ruby.
https://github.com/osyo-manga/vim-watchdogs
vim-watchdogs, apparently, is a syntax checker for vim, it says that it supports many languages, including vimL
if you use vundle, you can just drop this into your vimrc:
Plugin 'git://github.com/osyo-manga/vim-watchdogs.git'
..and then run:
:PluginInstall
..to set it up (vundle is a very nifty plugin manager) If you have syntastic, you might want to be careful and disable it first, and then see if it is an adequate replacement (since it says it supports all those languages anyway).
It is a safe bet that when you have multiple syntax checkers going, you will need to put your "dogs on a leash", so to speak; by configuring one to check languages that the other one does not, and vice-versa. If you do not, there will be at best collisions, duplications, or misdirections. At worst, you will have all of the above and more.
Make sure that you always backup your ~/.vim directory (or your VIMRUNTIME directory if you install things on a global level), you will be glad you did. Hope that helped you or someone else out, good luck! Sorry you had to wait 7.5 months for a response, heh :)
There's now a second option: vim-lint (as opposed to vimlint)

SWeave with non-R code chunks?

I often use Sweave to produce LaTeX documents where certain chunks are produced dynamically by executing R code. This works well - but is it also possible to have code chunks that are executed in different ways, e.g. by executing the code in the shell, or by running Perl, and so on? It would be helpful to be able to mix things up, so I could do things like run some shell commands to fetch some data, run some perl commands to pre-process it, and then run R commands to analyze it.
Of course I could use all R chunks and use system() as a poor-man's substitute, but that doesn't make for very pleasant reading in the document.
The new new thing (for multi-language, multi-format) docs may be dexy.it which for example these guys at opengamma.org use as the backend.
Ana, who is behind dexy, is also giving a lot of talks about it so also look at the dexy blog.
It's not directly related to Sweave, but org-babel, which is part of Emacs org-mode, allows to mix code chunks of different languages in one file, pass data from one chunk to another, execute them, and generate LaTeX or HTML export from the output.
You can find more informations about org-mode here :
http://www.orgmode.org/
And to see how org-babel works :
http://orgmode.org/worg/org-contrib/babel/
There is certainly no easy way to do this other than through either foreign language interfaces from R (maybe through inline if it's supported), or system(). For what it's worth, I would just use system(); that should be easy enough.
You can see this previous question about having a Sweave equivalent for Python, where one of the respondents actually creates a separate interface. This can give you a sense what what it would take to embed other languages which may not already be supported. At a minimum, you have to do major hacking on the Sweave driver.
Do you know emacs" org-mode and, more specifically, Babel? If you already know Emacs or are willing to switch to Emacs, then org-mode and Babel are the answer to your question(s).
For instance, I am currently working on a document which contains some shell-scripts, does computations with R and creates flow charts with dot (graphviz). Org-mode can export a variety of formats, e.g. LaTeX (that's what I use).
There is the StatWeave project which uses java rather than R to do the weaving, but will run multiple programs instead of just R. I don't know how hard it would be to get it to do Perl or other programs like that, but the homepage indicates that it already works with R, SAS, Stata, and others:
http://www.cs.uiowa.edu/~rlenth/StatWeave/

Bison (and flex) coding conventions

What are coding conventions and guidelines you suggest for writing Bison (.y) and flex (.lex) files?
Please address the length of the code sections and their style.
Thanks,
Asaf
P.S.,
There's an old thread about it here, but I'm looking for a more detailed answer (and to have it on SO!).
For questions like this in general I would typically see what other people have done. Good resources for this are Google Code Search and Koders. Both support searching by a specific programming language; however it appears that only Google has lex as a listed language.
Other than that, I generally try to keep to either 79 or 96 columns in source code, to make sure I can view at least 2 windows-worth of code side by side.

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