Coding Style

总体来说就是C/C++采用相同的coding style，但是如果是编写Linux内核模块，编写完之后，用Lindent来进行标准的Linux内核代码风格的缩进。如果是java代码，则进行标准java代码的缩进。

命名风格是C代码用Linux下的命名风格，xxx_xxx_xxx；C++代码和Java代码用微软的命名方法，variable用小写字母开头，method用大写字母开头。

最后，编程时不要偷懒，要在编程之初就进行防御性编程！因为用户和程序员（包括自己）都会犯错误，所以要在自己程序中尽早的进行防御性编程，以免程序挂的时候莫名其妙。

========================================================================
coding-style-C/C++

1. Indentation
follow emacs' default indentation for source files

2. Placing Braces
if (x is true)
{
 we do y
}

int function (int x)
{
 body of function
}

3. Naming
c language: xxx_xxx_xxx, refer to examples in fs/*c
c++, java: follow MS style, mXXXXX, strXXXXX, objXXXX, PutXXX(), SolveXXX()

4. Functions
Functions should only do onething, and do it well.
refer to examples in fs/*c

5. Comments
Good comments explain what the file or function does, and why it does it.
/**
 * my_function - does my stuff
 * @my_arg: my argument
 *
 * Does my stuff explained.
 **/
void my_function (int my_arg)
{
 ...
}

/**
 * my_struct - short description
 * @a : first member
 * @b: second member
 *
 * Longer Description
 **/
struct my_struct
{
 int a;
 int b;
};

6. Data structure requirements
If another thread can find your data structure, and you don't have a
reference counter on it, you almost certainly have a bug.

7. others
no typedef except for declaring function prototypes
no magic numbers
no ifdef in .c code
labled elements in initializers

 

==========================================================================
Tools
indent

Lindent
#!/bin/sh
PARAM="-npro -kr -i8 -ts8 -sob -l80 -ss -ncs -cp1"
RES=`indent --version`
V1=`echo $RES | cut -d' ' -f3 | cut -d'.' -f1`
V2=`echo $RES | cut -d' ' -f3 | cut -d'.' -f2`
V3=`echo $RES | cut -d' ' -f3 | cut -d'.' -f3`
if [ $V1 -gt 2 ]; then
  PARAM="$PARAM -il0"
elif [ $V1 -eq 2 ]; then
  if [ $V2 -gt 2 ]; then
    PARAM="$PARAM -il0";
  elif [ $V2 -eq 2 ]; then
    if [ $V3 -ge 10 ]; then
      PARAM="$PARAM -il0"
    fi
  fi
fi
indent $PARAM "$@"

================================================================================
format c language files
apt-get install indent
write a script Lindent, make it executable, and copy it to bin
Lindent xxx.c
Lindent *.c

 

==============================================================

coding-style-java

class XXX {

}

if () {

} else if () {

} else {

}

try {

} catch () {

}

我本来不是很喜欢这种编码风格，后来接触python后，发现python的强制缩进和这种风格很像。

def fun(...) :

    //编写次函数模块

//由于自动缩进，最后你在编写完后press backspace，就像给这段代码加了个}