mirror of
https://git.notmuchmail.org/git/notmuch
synced 2024-12-22 09:24:54 +01:00
118 lines
4 KiB
Text
118 lines
4 KiB
Text
C/C++ coding style
|
|
==================
|
|
|
|
Tools
|
|
-----
|
|
|
|
There is a file uncrustify.cfg in this directory that can be used to
|
|
approximate the prevailing code style. You can run it with e.g.
|
|
|
|
uncrustify --replace -c devel/uncrustify.cfg foo.c
|
|
|
|
You still have to use your judgement about accepting or rejecting the
|
|
changes uncrustify makes. With a nice git frontend, you can add the
|
|
lines you agree with and reject the rest.
|
|
|
|
For Emacs users, the file .dir-locals.el in the top level source
|
|
directory will configure c-mode to automatically meet most of the
|
|
basic layout rules. I
|
|
|
|
Indentation, Whitespace, and Layout
|
|
-----------------------------------
|
|
|
|
The following nonsense code demonstrates many aspects of the style:
|
|
|
|
static some_type
|
|
function (param_type param, param_type param)
|
|
{
|
|
for (int i = 0; i < 10; i++) {
|
|
int j;
|
|
|
|
j = i + 10;
|
|
|
|
some_other_func (j, i);
|
|
}
|
|
}
|
|
|
|
* Indent is 4 spaces with mixed tab/spaces and a tab width of 8.
|
|
(Specifically, a line should begin with zero or more tabs followed
|
|
by fewer than eight spaces.)
|
|
|
|
* Use copious whitespace. In particular
|
|
- there is a space between the function name and the open paren in a call.
|
|
- likewise, there is a space following keywords such as if and while
|
|
- every binary operator should have space on either side.
|
|
|
|
* No trailing whitespace. Please enable the standard pre-commit hook in git
|
|
(or an equivalent hook). The standard pre-commit hook is enabled by simply
|
|
renaming file '.git/hooks/pre-commit.sample' to '.git/hooks/pre-commit' .
|
|
|
|
* The name in a function prototype should start at the beginning of a line.
|
|
|
|
* Opening braces "cuddle" (they are on the same line as the
|
|
if/for/while test) and are preceded by a space. The opening brace of
|
|
functions is the exception, and starts on a new line.
|
|
|
|
* Opening parens also cuddle, even if the first argument does not fit
|
|
on the same line.
|
|
|
|
* Ternary operators that span a line should be parenthesized like as
|
|
"a ? (\n b ) : c". This is mainly to keep the indentation tools
|
|
happy.
|
|
|
|
* Comments are always C-style /* */ block comments, with a leading *
|
|
each line. They should start with a capital letter and generally be
|
|
written in complete sentences. Public library functions are
|
|
documented immediately before their prototype in lib/notmuch.h.
|
|
Internal functions are typically documented immediately before their
|
|
definition.
|
|
|
|
* Code lines should be less than 80 columns and comments should be
|
|
wrapped at 70 columns.
|
|
|
|
* Variable declarations should be at the top of a block; C99 style
|
|
control variable declarations in for loops are also OK.
|
|
|
|
Naming
|
|
------
|
|
|
|
* Use lowercase_with_underscores for function, variable, and type
|
|
names.
|
|
|
|
* Except for variables with extremely small scope, and perhaps loop
|
|
indices, when naming variables and functions, err on the side of
|
|
verbosity.
|
|
|
|
* All structs should be typedef'd to a name ending with _t. If the
|
|
struct has a tag, it should be the same as the typedef name, minus
|
|
the trailing _t.
|
|
|
|
CLI conventions
|
|
---------------
|
|
|
|
* Any changes to the JSON output format of search or show need an
|
|
accompanying change to devel/schemata.
|
|
|
|
libnotmuch conventions
|
|
----------------------------------
|
|
|
|
* Functions starting with notmuch_ in lib/notmuch.h are public and are
|
|
automatically exported from the shared library. Private library
|
|
functions should generally either be static or, if they are shared
|
|
between compilation units, start with _notmuch.
|
|
|
|
* Functions in libnotmuch must not access user configuration files
|
|
(i.e. .notmuch-config)
|
|
|
|
* Code which needs to be accessed from both the CLI and from
|
|
libnotmuch should be factored out into libutil (under util/).
|
|
|
|
* Deprecated functions should be marked with the NOTMUCH_DEPRECATED
|
|
macro which generates run time warnings with gcc and clang. In order
|
|
not to confuse doxygen this should go at the beginning of the
|
|
declaration like:
|
|
|
|
NOTMUCH_DEPRECATED(major,minor) notmuch_status_t notmuch_dwim(void *arg);
|
|
|
|
The @deprecated doxygen command can be used to generate markup in
|
|
the API docs.
|