Surrounding statements with conditionals in C mode.

Surrounding statements with conditionals in C mode.

[Saurabh Kapoor]

I've got several statements in my c code that i wish to surround by 
#ifdefs and #endif.

Eg. The following code :

	printf("This is debugging info: %d\n",i);
	printf("This is some more debugging info: \n");

should become

#ifdef MACRO_NAME
	printf("This is debugging info: %d\n",i);
	printf("This is some more debugging info: \n");
#endif

So, all that i have to do is to write the macro name.
Is there a way to do this. 

Thanks,
Saurabh Kapoor

III Semester,
Department of Computer Science,
University of Pune.
India.


-- 
"...BACKWARDS understood be only can but,
    forwards lived be must Life"
			      -- Kierkegaard Soren

Re: Surrounding statements with conditionals in C mode.

[Joakim Hove]

Saurabh Kapoor <u02137@cs.unipune.ernet.in> writes:


> So, all that i have to do is to write the macro name.
> Is there a way to do this. 

There might be proper included functionality for this already, but the
following solution seems to work reasonably well:


(defun ifdef-region (p1 p2)
  (interactive "r")
  (let* ((macro (read-from-minibuffer "Macro: "))
	 (ifdef (concat "#ifdef " macro "\n")))
    (goto-char p1)
    (beginning-of-line)
    
    (insert ifdef)
    (goto-char (+ p2 (length ifdef)))
    (end-of-line)
    (newline 1)
    (insert "#endif"))) 


Joakim 


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Re: Surrounding statements with conditionals in C mode.

[Sandip Chitale]

Look into <youremacsdir>/lisp/tempo.el file for how to set up such a template.

"Saurabh Kapoor" <u02137@cs.unipune.ernet.in> wrote in message news:mailman.206.1062751223.18171.help-gnu-emacs@gnu.org...
> I've got several statements in my c code that i wish to surround by
> #ifdefs and #endif.
>
> Eg. The following code :
>
> printf("This is debugging info: %d\n",i);
> printf("This is some more debugging info: \n");
>
> should become
>
> #ifdef MACRO_NAME
> printf("This is debugging info: %d\n",i);
> printf("This is some more debugging info: \n");
> #endif
>
> So, all that i have to do is to write the macro name.
> Is there a way to do this.
>
> Thanks,
> Saurabh Kapoor
>
> III Semester,
> Department of Computer Science,
> University of Pune.
> India.
>
>
> --
> "...BACKWARDS understood be only can but,
>     forwards lived be must Life"
>       -- Kierkegaard Soren
>
>
>

Re: Surrounding statements with conditionals in C mode.

[Stefan Monnier]

> Eg. The following code :

> 	printf("This is debugging info: %d\n",i);
> 	printf("This is some more debugging info: \n");

> should become

> #ifdef MACRO_NAME
> 	printf("This is debugging info: %d\n",i);
> 	printf("This is some more debugging info: \n");
> #endif

(define-skeleton my-c-conditionalize
  "Conditionalize a piece of code with cpp stuff."
  "CPP var to use: "
  \n "#ifdef " str
  \n _
  \n "#endif /* " str " */" \n)

And then (using transient-mark-mode) select the region of code you want
to conditionalize and do M-x my-c-conditionalize RET MACRO_NAME RET


        Stefan