[asterisk-dev] Re: [asterisk-commits] kpfleming: trunk r49008 - in /trunk: ./ main/

[Steve Edwards]

On Wed, 27 Dec 2006, Kevin P. Fleming wrote:

> Luigi Rizzo wrote:
>> boy, you really liked that! :)
>
> Yes, and it reduced the size of main/asterisk on my dev workstation by
> over 300 bytes! Yipppeeee!

I must have missed something here.

 	#include	<stdio.h>

 	static int a1;
 	static int a2;
 		...
 	static int a1023;
 	static int a1024;

 	int					main
 		(
 		  int				argc
 		, char				**argv
 		)
 		{
 		a1 = 0;
 		a2 = 0;
 		...
 		a1023 = 0;
 		a1024 = 0;
 		return(0);
 		}

produces the exact same size executable (using gcc 3.4.6) as:

 	#include	<stdio.h>

 	static int a1 = 0;
 	static int a2 = 0;
 		...
 	static int a1023 = 0;
 	static int a1024 = 0;

 	int					main
 		(
 		  int				argc
 		, char				**argv
 		)
 		{
 		a1 = 0;
 		a2 = 0;
 		...
 		a1023 = 0;
 		a1024 = 0;
 		return(0);
 		}

Further, I would think explicit initialization would be preferred because 
it is then obvious to the next programmer (who may not know all of the 
dark corners of the C standard) that you didn't "forget" to initialize or 
you don't care about the variable's initial value, you really did want the 
variable initialized with the "default" initialization value.

Thanks in advance,
------------------------------------------------------------------------
Steve Edwards      sedwards at sedwards.com      Voice: +1-760-468-3867 PST
Newline                                             Fax: +1-760-731-3000