Re: bootconfig

[Eric Delaunay <delaunay@lix.polytechnique.fr>]

Karl M. Hegbloom wrote:
> >>>>> "Eric" == Eric Delaunay <delaunay@lix.polytechnique.fr> writes:
> 
>     Eric> Karl M. Hegbloom wrote:
>     >> >>>>> "Mark" == Mark van Walraven <markv@wave.co.nz> writes:
>     >> 
>     Mark> On Thu, Feb 17, 2000 at 01:39:06PM -0800, Karl M. Hegbloom wrote:
>     >> >> Ok; I looked; using `sizeof' on a char * "string" isn't right, is it?
>     >> >> I think you have to use strlen then, or you'll get the size of a char
>     >> >> *, not the length of the string.  I've changed it to strlen in the
>     >> >> branch already.
>     >> 
>     Mark> Where have I done this?  Note that a string literal is not the same size as
>     Mark> char *.  Try compiling and running:
>     >> 
>     Mark> main() { exit(sizeof "hello"); }
>     >> 
>     Mark> ... the exit code should be 6.
>     >> 
>     >> Oh.  I just checked, and you're right.  I thought it would return the
>     >> size of a char *, which is probably 4.
> 
>     Eric> It's because "hello" is considered an array of char by the compiler (char[6]),
>     Eric> not a pointer, so sizeof returns the size of the array.
> 
>  Well, yes, that's obvious.  Do you know if that behaviour is part of
>  the ANSI standard?

I guess, but I don't have ANSI C book on my own, only one for C++.
Anyway my book is telling so.  And also the K&R C compiler SUN delivered in
the past along with SunOS-4.

Regards.

-- 
 Eric Delaunay                 | S'il n'y a pas de solution, c'est qu'il n'y
 delaunay@lix.polytechnique.fr | a pas de problème.   Devise Shadok.