Re: linux/macros.h(new) and linux/list.h(mod) ...

Daniel Phillips
2001-07-05T22:30:39Z

On Thursday 05 July 2001 23:45, Davide Libenzi wrote:
> On 05-Jul-2001 David Woodhouse wrote:
> > davidel@xmailserver.org said:
> >> This patch add a new linux/macros.h that is supposed to host utility
> >> macros that otherwise developers are forced to define in their files.
> >> This version contain only min(), max() and abs().
> >
> > Consider min(x++,y++). Try:
> >
> >#define min(x,y) ({ typeof((x)) _x = (x); typeof((y)) _y = (y);
> > (_x>_y)?_y:_x; #})
> >#define max(x,y) ({ typeof((x)) _x = (x); typeof((y)) _y = (y);
> > (_x>_y)?_x:_y; #})
>
> Yep, it's better.

This program prints garbage:

#define min(x,y) ({ typeof((x)) _x = (x); typeof((y)) _y = (y); (_x>_y)?_y:_x; })

int main (void) {
int _x = 3, _y = 4;
printf("%i\n", min(_x, _y));
return 0;
}

--
Daniel