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doc: Update the introduction to the coding style information

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Marcel Holtmann 2014-08-08 18:28:23 -07:00
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doc/coding-style.txt
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Every project has its coding style, and oFono is not an exception. This
document describes the preferred coding style for oFono code, in order to keep
some level of consistency among developers so that code can be easily
understood and maintained, and also to help your code survive under
maintainer's fastidious eyes so that you can get a passport for your patch
ASAP.
Background
==========
First of all, oFono coding style must follow every rule for Linux kernel
(http://www.kernel.org/doc/Documentation/CodingStyle). There also exists a tool
named checkpatch.pl to help you check the compliance with it. Just type
"checkpatch.pl --no-tree patch_name" to check your patch. In theory, you need
to clean up all the warnings and errors except this one: "ERROR: Missing
Signed-off-by: line(s)". oFono does not used Signed-Off lines, so including
them is actually an error. In certain circumstances one can ignore the 80
character per line limit. This is generally only allowed if the alternative
would make the code even less readable.
Every project has its coding style, and the Wireless daemon is not an
exception. This document describes the preferred coding style for the
Wireless daemon code, in order to keep some level of consistency among
developers so that code can be easily understood and maintained, and also
to help your code survive under maintainer's fastidious eyes so that you
can get a passport for your patch ASAP.
Besides the kernel coding style above, oFono has special flavors for its own.
Some of them are mandatory (marked as 'M'), while some others are optional
(marked as 'O'), but generally preferred.
First of all, the Wireless daemon coding style must follow every rule for
Linux kernel (http://www.kernel.org/doc/Documentation/CodingStyle). There
also exists a tool named checkpatch.pl to help you check the compliance
with it. Just type "checkpatch.pl --no-tree patch_name" to check your patch.
In theory, you need to clean up all the warnings and errors except this
one: "ERROR: Missing Signed-off-by: line(s)". The Wirless daemon does not
used Signed-Off lines, so including them is actually an error. In certain
circumstances one can ignore the 80 character per line limit. This is
generally only allowed if the alternative would make the code even less
readable.
Besides the kernel coding style above, the Wireless daemon has special
flavors for its own. Some of them are mandatory (marked as 'M'), while
some others are optional (marked as 'O'), but generally preferred.
M1: Blank line before and after an if/while/do/for statement