ident the code

ident the code

[filebat Mark]

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Hi, all
I have some C++ source codes. I want make sure there is just a space on both
sides of "=".
That means script1 will  be changed to script2, as following.
Script1:
int a= 2;
a  =a+3;

Script2:
int a = 2;
a = a+3;

-------------------
I think maybe an elisp function can do this job. I am wondering how to find
this elisp code, cause I don't want to reinvent the wheel.

Thanks for your attention.



-- 
Thanks & Regards

Denny Zhang

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Re: ident the code

[Peter Dyballa]

Am 25.08.2008 um 15:59 schrieb filebat Mark:

> I have some C++ source codes. I want make sure there is just a  
> space on both
> sides of "=".


Do you think you could achieve your aim with regular expressions?

	(replace-regexp " *= *" " = ")

Replace all occurrences of zero or more spaces followed by "=" and  
followed by zero or more spaces with exactly " = ". This would also  
change initialisation of loops ... but the regular expression could  
be made more complicated to handle parentheses on the line, to avoid  
replacements when they exist on that line.

--
Greetings

   Pete

There is no national science just as there is no national  
multiplication table; what is national is no longer science.
				– Anton Checov

Re: ident the code

[David Hansen]

On Mon, 25 Aug 2008 21:59:01 +0800 filebat Mark wrote:

> I think maybe an elisp function can do this job. I am wondering how to find
> this elisp code, cause I don't want to reinvent the wheel.

Tried this?  It has tons of options.

INDENT(1)

NAME
       indent  - changes the appearance of a C program by inserting or
       deleting whitespace.

David

Re: ident the code

[filebat Mark]

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to Peter:
I think our replace-regex doesn't work well.
1) Supposing a code line is "if(s!=0)", it will be changed into "if(s! =
0)". That's definitely not the thing we want. The same problem occurs for
"if (s==0)".
2) A line of "strcpy(str, "a=2")", will be changed into "strcpy(str, "a =
2").

So we should spend more effort to solve those problems.
-----------------------------------------------------------------------------------------------------------------------
To David:
Indent is quite a useful utility. Thanks very much for your suggestion!
There are still something that doesn't look good for me.
Such as, script1 will be changed to srcipt2.
script1

void test(char* str)
{
 int i;
i=    2;

strcpy(str,        "hello");
}

script2
void
test( char* str )
{
 int i;
 i = 2;

 strcpy(str, "hello");
}


But what I want is script3.
script3:
void test( char* str )
{
 int i;
 i = 2;
 strcpy(str, "hello");
}

-----------------------------------------------------------------------------------------------------------------------
I'am sorry to bother you guys. I just curious how skilled programmers indent
their codes, to make them look nice. They may have written tons of codes,
not only C/C++, but also java, python, whatever.


2008/8/26 David Hansen <david.hansen@gmx.net>

> On Mon, 25 Aug 2008 21:59:01 +0800 filebat Mark wrote:
>
> > I think maybe an elisp function can do this job. I am wondering how to
> find
> > this elisp code, cause I don't want to reinvent the wheel.
>
> Tried this?  It has tons of options.
>
> INDENT(1)
>
> NAME
>       indent  - changes the appearance of a C program by inserting or
>       deleting whitespace.
>
> David
>
>
>
>


-- 
Thanks & Regards

Denny Zhang

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Re: ident the code

[filebat Mark]

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I have wrote the following elisp function. I think it works from my side.
Hopes it's useful for someone else.


(global-set-key [M-f12] 'my_indent_code);;indent code
(defun my_indent_code()
  (interactive)
  ;;remove blank lines
  (goto-char 0)
  (flush-lines "^$")
  (save-buffer)
  (setq current_filename (buffer-name (current-buffer)))
  ;;indent the code, add or remove some space
  (setq commandline "indent ")
  (setq commandline (concat commandline current_filename))
  (shell-command-to-string commandline)
  ;;convert the line endings of text files from DOS style to unix style
  (setq commandline "dos2unix ")
  (setq commandline (concat commandline current_filename))
  (shell-command-to-string commandline)
  ;;reload
  (revert-buffer t t)
)



2008/8/26 filebat Mark <filebat.mark@gmail.com>

> to Peter:
> I think our replace-regex doesn't work well.
> 1) Supposing a code line is "if(s!=0)", it will be changed into "if(s! =
> 0)". That's definitely not the thing we want. The same problem occurs for
> "if (s==0)".
> 2) A line of "strcpy(str, "a=2")", will be changed into "strcpy(str, "a =
> 2").
>
> So we should spend more effort to solve those problems.
>
> -----------------------------------------------------------------------------------------------------------------------
> To David:
> Indent is quite a useful utility. Thanks very much for your suggestion!
> There are still something that doesn't look good for me.
> Such as, script1 will be changed to srcipt2.
> script1
>
> void test(char* str)
> {
>  int i;
> i=    2;
>
> strcpy(str,        "hello");
> }
>
> script2
> void
> test( char* str )
> {
>  int i;
>  i = 2;
>
>  strcpy(str, "hello");
> }
>
>
> But what I want is script3.
> script3:
> void test( char* str )
> {
>  int i;
>  i = 2;
>  strcpy(str, "hello");
> }
>
>
> -----------------------------------------------------------------------------------------------------------------------
> I'am sorry to bother you guys. I just curious how skilled programmers
> indent their codes, to make them look nice. They may have written tons of
> codes, not only C/C++, but also java, python, whatever.
>
>
> 2008/8/26 David Hansen <david.hansen@gmx.net>
>
> On Mon, 25 Aug 2008 21:59:01 +0800 filebat Mark wrote:
>>
>> > I think maybe an elisp function can do this job. I am wondering how to
>> find
>> > this elisp code, cause I don't want to reinvent the wheel.
>>
>> Tried this?  It has tons of options.
>>
>> INDENT(1)
>>
>> NAME
>>       indent  - changes the appearance of a C program by inserting or
>>       deleting whitespace.
>>
>> David
>>
>>
>>
>>
>
>
> --
> Thanks & Regards
>
> Denny Zhang
>
>


-- 
Thanks & Regards

Denny Zhang

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Re: ident the code

[Andreas Politz]

filebat Mark wrote:
> I have wrote the following elisp function. I think it works from my side.
> Hopes it's useful for someone else.
> 
> 
> (global-set-key [M-f12] 'my_indent_code);;indent code
> (defun my_indent_code()
>   (interactive)
>   ;;remove blank lines
>   (goto-char 0)
>   (flush-lines "^$")
>   (save-buffer)
>   (setq current_filename (buffer-name (current-buffer)))
>   ;;indent the code, add or remove some space
>   (setq commandline "indent ")
>   (setq commandline (concat commandline current_filename))
>   (shell-command-to-string commandline)
>   ;;convert the line endings of text files from DOS style to unix style
>   (setq commandline "dos2unix ")
>   (setq commandline (concat commandline current_filename))
>   (shell-command-to-string commandline)
>   ;;reload
>   (revert-buffer t t)
> )
> 
> 
> 
> 2008/8/26 filebat Mark <filebat.mark@gmail.com>
> 
>> to Peter:
>> I think our replace-regex doesn't work well.
>> 1) Supposing a code line is "if(s!=0)", it will be changed into "if(s! =
>> 0)". That's definitely not the thing we want. The same problem occurs for
>> "if (s==0)".
>> 2) A line of "strcpy(str, "a=2")", will be changed into "strcpy(str, "a =
>> 2").
>>
>> So we should spend more effort to solve those problems.
>>
>> -----------------------------------------------------------------------------------------------------------------------
>> To David:
>> Indent is quite a useful utility. Thanks very much for your suggestion!
>> There are still something that doesn't look good for me.
>> Such as, script1 will be changed to srcipt2.
>> script1
>>
>> void test(char* str)
>> {
>>  int i;
>> i=    2;
>>
>> strcpy(str,        "hello");
>> }
>>
>> script2
>> void
>> test( char* str )
>> {
>>  int i;
>>  i = 2;
>>
>>  strcpy(str, "hello");
>> }
>>
>>
>> But what I want is script3.
>> script3:
>> void test( char* str )
>> {
>>  int i;
>>  i = 2;
>>  strcpy(str, "hello");
>> }
>>
>>
>> -----------------------------------------------------------------------------------------------------------------------
>> I'am sorry to bother you guys. I just curious how skilled programmers
>> indent their codes, to make them look nice. They may have written tons of
>> codes, not only C/C++, but also java, python, whatever.
>>
>>
>> 2008/8/26 David Hansen <david.hansen@gmx.net>
>>
>> On Mon, 25 Aug 2008 21:59:01 +0800 filebat Mark wrote:
>>>> I think maybe an elisp function can do this job. I am wondering how to
>>> find
>>>> this elisp code, cause I don't want to reinvent the wheel.
>>> Tried this?  It has tons of options.
>>>
>>> INDENT(1)
>>>
>>> NAME
>>>       indent  - changes the appearance of a C program by inserting or
>>>       deleting whitespace.
>>>
>>> David
>>>
>>>
>>>
>>>
>>
>> --
>> Thanks & Regards
>>
>> Denny Zhang
>>
>>
> 
> 


Here is how I would do it, with my current knowledge
of emacs-fu.

(defun pretty-operator (start end)
   (interactive "r")
   (save-excursion
     (goto-char start)
     (while (search-forward-regexp "\\(\\b\\|\\s-*\\)=\\(\\b\\|\\s-*\\)" (1+ end) t)
       (when (not (or (nth 4 (syntax-ppss)) ;not string
		     (nth 3 (syntax-ppss)))) ;not comment
	(replace-match " = ")))))


-ap