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Source code standards for libmaple.
Do it like this unless there's a really good reason why not. You
being a lazy bastard doesn't count as a good reason.
The file .dir-locals.el in the libmaple root directory already ensures
that many of these standards are followed by default, if you use emacs
(and not Windows, where it would need to be named _dir_locals.el, and
no way, man). There's also some elisp scattered about this file which
will provide you additional help.
Vim customizations to do the same thing would be nice!
License
-------
- Put an MIT license at the beginning of the file (look at any of our
source files for an example). Copyright should go to either your or
LeafLabs LLC.
Emacs: if you don't like seeing the license, you should use
elide-head (which will hide it for you). Here is some elisp you can
modify to make this pleasant:
(require 'elide-head)
(setq programming-mode-hooks '(c-mode-hook c++-mode-hook))
(add-to-list 'elide-head-headers-to-hide
'("The MIT License" . "DEALINGS IN\n [*] THE SOFTWARE"))
(add-to-list 'elide-head-headers-to-hide
'("The MIT License" . "DEALINGS IN THE\n...SOFTWARE"))
(dolist (hook mbolivar-programming-mode-hooks)
(add-hook hook (lambda () (elide-head))))
Whitespace
----------
- 4 space indents. [Set in .dir-locals.el]
- Unix newlines.
- No tab characters. [Set in .dir-locals.el]
- No trailing whitespace. For help getting this (and no tab
characters) done automatically in Emacs, you can use this:
http://github.com/mbolivar/code-fascism
I hear tell you can get something similar in vim; ask Perry, I
guess.
- Files end in exactly one newline. [The presence of a newline at EOF
is already done by `c-require-final-newline' in recent versions of
emacs.]
- Exactly two newlines separate source paragraphs.
- The first line in a function is non-blank.
Comments
--------
- Multi-line comments look like this:
/* text starts here
* continued lines have a '*' before them
* the comment can end after the last line
*/
or this:
/* comment starts here
* the comment can end on the same line */
- Doxygen comments are newline comments that begin with /** instead.
- Single-line comments on the same line are // in c or c++.
- Single-line comments on their own source line are /* */ in c, but
can also be // in c++. If you think that typing out /* */ is too
slow in emacs, use M-; (comment-dwim) when you're on an empty line,
and it'll ... well...
You should be using the (super awesome) comment-dwim; it pretty
much does exactly what you want to the comment on the current
line, including "create one and put it in the right place".
Braces
------
- 1TBS. Nothing more need be said.
http://en.wikipedia.org/wiki/Indent_style#Variant:_1TBS
Naming conventions
------------------
So there's always a fight about upper and lower case vs. underscores.
We'll handle this as follows. First, Dammit_Dont_Mix_Like_This,
because It_Looks_Really_Ugly, ok?
- Variables: Use underscores to separate words in C identifiers:
int some_example_name;
It is strongly advised to do it this way in C++ too, but it's not
[yet] mandatory.
- Classes: Pascal case. So ThisIsAClassName, but thisIsNot,
this_is_not, and like I said, Dont_You_DareTryANYTHING_STUPID.
- Functions: C functions are all lowercase, and words are separated by
underscores. C++ method names are camel cased.
- Structs: pick a style from "Variables" or "Classes" depending on how
you mean it (since it might be either a simple record type, in which
case do like c variables, or you might be faking an object in c, in
which case do like classes). If it's in a typedef, should also
probably put _t at the end, but maybe you won't, and I don't really
feel too strongly about it.
- Acronyms: The case of letters in an acronym is determined by the
case of the first letter in the acronym. Examples:
void usb_func() { ... }
class SomethingUSB {
void usbInit();
void initUSB();
};
NEVER DO THIS:
class BadUsb { ... }; // say "GoodUSB" instead
- Macros and constants: all caps, separated by underscores.
- foo.h gets ifdef'ed to _FOO_H_.
Documentation
-------------
- Document your code, bitches!
- At least put a doxygen comment with a nonempty @brief for every
source file you add. See the existing ones for examples.
General Formatting
------------------
- Keep it 80-column clean. That means Emacs says the largest column
number=79. If you haven't already, you should turn on column
numbers to help you out:
(column-number-mode 1)
You can get more help from lineker-mode. Download it here:
http://www.helsinki.fi/~sjpaavol/programs/lineker.el
Then put the file somewhere in your load-path, and
(require 'lineker)
(dolist (hook programming-mode-hooks)
(add-hook hook (lambda () (lineker-mode 1))))
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