top, fixed buffer length in utils.c

[Paul Koch]

On Sun, 1 Feb 2015 17:51:59 +0800
Erich Dollansky <erichsfreebsdlist at alogt.com> wrote:

> Hi,
> 
> I came across this here in utils.c which is part of top:
> 
> 
> /*
>  * How do we know that 16 will suffice?
>  * Because the biggest number that we
>   will
>  * ever convert will be 2^32-1, which
>  is 10
>  * digits.
> */
> 
> char *itoa(val)
> 
> register int val;
> 
> int can be 64 bits on a amd64 machine. Why is the author of this code
> so sure that we will never cross the 32 bit boundary?
> 
> Erich

I thought an 'int' was a 32bit number on amd64 arch.


#include <stdio.h>
#include <stdlib.h>

int
main (void)
{
   printf ("%zd\n", sizeof (int));
   exit (0);
}


	Paul.
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