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Coding Style
The programming language used is ***POSIX C99*** and all code must be written
in ***POSIX C99***, no extensions are used.
The coding style is as follows:
General
-------
*The code shall be as simple to understand as possible, add comments if
necessary*
*For indentation, the code shall use tab characters*
*The code shall avoid using GNU-specific functions (as that would make
the program less portable)*
*Each line shall not exceed 79 characters*
*Utilities shall only implement POSIX-compliant options, if the utility
supports options, and the specified option is invalid, the utility shall
print a help text (this applies only to coreutils)*
*Utilities shall only use the *standard C library and POSIX libraries**
*For comments, instead of using `//` (as in `// Comment`), the code shall
use `/*` and `*/` (as in `/* Comment */`)*
*For commenting code, use `//` (as in `// printf("broken code")`)*
*Variable names shall describe the variable's purpose*
*The `main()` function shall be placed at the top, after function
prototypes, to increase code readability*
Blocks
------
*In a block, do not use `{` and `}` if there's only one instruction inside*
for (int i; i != 3; i++)
printf("%d\n", i);
*When using `{` and `}`, `{` shall not be on it's own line*
if (i) {
printf("%d", i);
i = 3;
}
*The block shall only use 1 line if there's only one instruction ran and
that shall not exceed 79 characters*
if (foo[1] == 'a') foo[1] = 'b';
Functions
---------
*The function type shall be on the same line as the function name and `{`*
int main() {
printf("Hello World.\n");
}
*Function names shall describe the function's intended purpose*
*When exiting, the function shall use `return` instead of `exit()`*
int calculate(int i) {
int result;
if (i != 0)
result = 30 / 1;
return 0;
else
return 1;
}
*Variable declarations shall be at the top of the function*
int main() {
int i, result;
char foo;
bool bar;
...
}
for (int i; i != 3; i++)
printf(“%d\n”, i);
Switch
------
*In `switch (foo)`, `case` shall be indented*
switch (foo) {
case 'b':
break;
case 'a':
printf("bar\n");
default:
return 0;
}
Preprocessor statements
-----------------------
*The `#define` preprocessor statement shall only be used for setting
constant values*
#define FOO 80
*Preprocessor statements shall not be indented*
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