Hi Pablo, On Wed, Oct 23, 2019 at 01:23:11PM +0200, Pablo Neira Ayuso wrote: > On Wed, Oct 23, 2019 at 01:20:24PM +0200, Pablo Neira Ayuso wrote: > > On Fri, Oct 18, 2019 at 05:51:14PM +0200, Phil Sutter wrote: > > > Variable 'table' is an array of type struct table_struct, so this is a > > > classical use-case for ARRAY_SIZE() macro. > > > > > > Signed-off-by: Phil Sutter <phil@xxxxxx> > > > > Acked-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx> > > BTW, probably good to add the array check? > > https://sourceforge.net/p/libhx/libhx/ci/master/tree/include/libHX/defs.h#l152 Copying from kernel sources, do you think that's fine? | # ifndef ARRAY_SIZE | -# define ARRAY_SIZE(x) (sizeof(x) / sizeof(*(x))) | +# define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:(-!!(e)); })) | +# define __same_type(a, b) \ | + __builtin_types_compatible_p(typeof(a), typeof(b)) | +/* &a[0] degrades to a pointer: a different type from an array */ | +# define __must_be_array(a) \ | + BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0])) | +# define ARRAY_SIZE(x) (sizeof(x) / sizeof(*(x))) + __must_be_array(x) | # endif Cheers, Phil
