[idle] Re: Fwd: SourceForge.net Project Approved

On Monday 08 September 2003 19:28, you wrote:
>Backup manager
>Document Manager

Nqkakva ideq tezi kakvo sa, zashtoto ne sym gi sreshtal iz docs na SFN.

>Inache wseki mozhe da pochwa da pishe kod. Hubawo e wseki modul da si e w
>otdelna direktorijka,kxdeto da ima failowe kato ChangeLog, README,
>Makefile, Bugs, TODO.

Dotuk dobre.

>W glawnata direktoriq shte postawim LICENSE

Mislq che standarta e file-a da se kazva COPYING. Tova iziskvat i GNU
autotools, koito po-princip osven vsichko drugo se grizhat da spazvash i
GNU coding standarts (pone dokolkoto mogat).

>i doc poddirektoriqta, kato w tazi poslednata, shte pishem kakwi tochno
>moduli ima i kak se izpolzwat(abe dokumentaciqta e tam).

Ne mislq che e razumno. Dokumentaciqta za vseki modul mislq che trqbva da
si e v negovata poddirektoriq. Taka ako iskam da si rabotq samo po moq kod,
nqma nuzhda za CVS up-vam i dokumentaciqta na drugite primerno. Kato mi
potrqbva modul na nqkoj drug shte si drypna samo nego s cqlata mu dokumentaciq
bez da me e enq che ima oshte 2000 modula s nova dokumentaciq koito obache ne
polzvam.
V obshta doc/ direktoriq naj mnogo da slozim obshti prikazki za IDLe, tutorial
i HGI (hackers'/hitch-hikers' guide to IDLe).

>No predi wsichko towa trqbwa da izbereme stil napisane.

See attachment.

>I oshte neshto - trqbwa da reshim dali shte polzwame mailing list/discussion
>forum. No ako shte gi polzwame trqbwa da pishem tam *samo* na anglijski.

Az sym za tova da gi polzvame. Anglijski - ami hubavo.

>I nakraq, kojto ne si e sxzdal account wxw SF da si sxzdade i da se wkljuchi
>kxm proekta.

Sydejki po malkiq mi opit sys SFN, mislq che admin-a trqbva da me slozhi kym
daden proekt. Taka che schitaj tova za pismo do admin-a s request da me
zapishe. Account-a mi se kazva 'rangel' (bez kavichkite ;-)

-- 
Rangel Dokov





Tova e orqzana versiq na /usr/src/linux/Documentation/CodingStyle.
Postarah se da ostavq samo chastite, koito sa syshtestveni. Obshto vzeto
napylno podkrepqm vsichko kazano v tozi dokument.

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

                Chapter 1: Indentation

Tabs are 8 characters, and thus indentations are also 8 characters. 

Rationale: The whole idea behind indentation is to clearly define where
a block of control starts and ends.  Especially when you've been looking
at your screen for 20 straight hours, you'll find it a lot easier to see
how the indentation works if you have large indentations. 

Now, some people will claim that having 8-character indentations makes
the code move too far to the right, and makes it hard to read on a
80-character terminal screen.  The answer to that is that if you need
more than 3 levels of indentation, you're screwed anyway, and should fix
your program. 

In short, 8-char indents make things easier to read, and have the added
benefit of warning you when you're nesting your functions too deep. 
Heed that warning. 


                Chapter 2: Placing Braces

The other issue that always comes up in C styling is the placement of
braces.  Unlike the indent size, there are few technical reasons to
choose one placement strategy over the other, but the preferred way, as
shown to us by the prophets Kernighan and Ritchie, is to put the opening
brace last on the line, and put the closing brace first, thusly:

        if (x is true) {
                we do y
        }

However, there is one special case, namely functions: they have the
opening brace at the beginning of the next line, thus:

        int function(int x)
        {
                body of function
        }

Heretic people all over the world have claimed that this inconsistency
is ...  well ...  inconsistent, but all right-thinking people know that
(a) K&R are _right_ and (b) K&R are right.  Besides, functions are
special anyway (you can't nest them in C). 

Note that the closing brace is empty on a line of its own, _except_ in
the cases where it is followed by a continuation of the same statement,
ie a "while" in a do-statement or an "else" in an if-statement, like
this:

        do {
                body of do-loop
        } while (condition);

and

        if (x == y) {
                ..
        } else if (x > y) {
                ...
        } else {
                ....
        }
                        
Rationale: K&R. 

Also, note that this brace-placement also minimizes the number of empty
(or almost empty) lines, without any loss of readability.  Thus, as the
supply of new-lines on your screen is not a renewable resource (think
25-line terminal screens here), you have more empty lines to put
comments on. 


                Chapter 3: Naming

C is a Spartan language, and so should your naming be.  Unlike Modula-2
and Pascal programmers, C programmers do not use cute names like
ThisVariableIsATemporaryCounter.  A C programmer would call that
variable "tmp", which is much easier to write, and not the least more
difficult to understand. 

HOWEVER, while mixed-case names are frowned upon, descriptive names for
global variables are a must.  To call a global function "foo" is a
shooting offense. 

GLOBAL variables (to be used only if you _really_ need them) need to
have descriptive names, as do global functions.  If you have a function
that counts the number of active users, you should call that
"count_active_users()" or similar, you should _not_ call it "cntusr()". 

LOCAL variable names should be short, and to the point.  If you have
some random integer loop counter, it should probably be called "i". 
Calling it "loop_counter" is non-productive, if there is no chance of it
being mis-understood.  Similarly, "tmp" can be just about any type of
variable that is used to hold a temporary value. 


                Chapter 4: Functions

Functions should be short and sweet, and do just one thing.  They should
fit on one or two screenfuls of text (the ISO/ANSI screen size is 80x24,
as we all know), and do one thing and do that well. 

The maximum length of a function is inversely proportional to the
complexity and indentation level of that function.  So, if you have a
conceptually simple function that is just one long (but simple)
case-statement, where you have to do lots of small things for a lot of
different cases, it's OK to have a longer function. 

However, if you have a complex function, and you suspect that a
less-than-gifted first-year high-school student might not even
understand what the function is all about, you should adhere to the
maximum limits all the more closely.  Use helper functions with
descriptive names (you can ask the compiler to in-line them if you think
it's performance-critical, and it will probably do a better job of it
that you would have done). 

Another measure of the function is the number of local variables.  They
shouldn't exceed 5-10, or you're doing something wrong.  Re-think the
function, and split it into smaller pieces.  A human brain can
generally easily keep track of about 7 different things, anything more
and it gets confused.  You know you're brilliant, but maybe you'd like
to understand what you did 2 weeks from now. 


                Chapter 5: Commenting

Comments are good, but there is also a danger of over-commenting.  NEVER
try to explain HOW your code works in a comment: it's much better to
write the code so that the _working_ is obvious, and it's a waste of
time to explain badly written code. 

Generally, you want your comments to tell WHAT your code does, not HOW. 
Also, try to avoid putting comments inside a function body: if the
function is so complex that you need to separately comment parts of it,
you should probably go back to chapter 4 for a while.  You can make
small comments to note or warn about something particularly clever (or
ugly), but try to avoid excess.  Instead, put the comments at the head
of the function, telling people what it does, and possibly WHY it does
it. 

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

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