[Bug-gnulib] MIN, MAX and ABS

[Oskar Liljeblad]

minmax.h defines MIN and MAX macros like this:

#ifndef MAX
# if __STDC__ && defined __GNUC__ && __GNUC__ >= 2
#  define MAX(a,b) (__extension__                                           \
                     ({__typeof__ (a) _a = (a);                             \
                       __typeof__ (b) _b = (b);                             \
                       _a > _b ? _a : _b;                                   \
                      }))
# else
#  define MAX(a,b) ((a) > (b) ? (a) : (b))
# endif
#endif

While the gcc solution is nice, don't most people assume that
MAX/MIN behaves like the second case? I know this has been
discussed before (see
http://mail.gnu.org/archive/html/bug-gnulib/2003-01/msg00077.html),
but I'd like to reopen the case...

A solution would be to use lower case min and max to be like it
is defined above.

Also, an ABS macro here would be useful as well:

#undef ABS
#define ABS(a) (((a) < 0) ? -(a) : (a))

#ifndef abs
# if __STDC__ && defined __GNUC__ && __GNUC__ >= 2
#  define abs(a) (__extension__                                           \
                   ({__typeof__ (a) _a = (a);                             \
                     _a < 0 ? -_a : _a;                                   \
                    }))
# else
#  define abs(a,b) (((a) < 0) ? -(a) : (a))
# endif
#endif

Regards,

Oskar Liljeblad (address@hidden)