Re: [PATCH] hash: Remove useless init_hash()

[Jeff King <peff@peff.net>]

On Tue, Jul 27, 2010 at 10:36:09AM +0000, Ævar Arnfjörð Bjarmason wrote:

> >> -static inline void init_hash(struct hash_table *table)
> >> -{
> >> -     table->size = 0;
> >> -     table->nr = 0;
> >> -     table->array = NULL;
> >> -}
> >
> > *This* could be replaced by memset.
> 
> No it couldn't? The second argument to memset is just an int, so
> setting the memory area to 0 isn't portable to systems where the
> representation of NULL isn't "0".
> 
> (It's early so I may be misremembering my C..)

You're remembering your C correctly. It isn't portable, but it is so
unlikely on modern machines that we simply don't care (and you will see
memsets zero-ing pointers like this all through the git code, so this is
certainly not introducing anything new).

That being said, I agree with the comments that removing init_hash
actually makes the code _less_ readable. You could just replace these
three lines with a memset, but why? It's just code churn.

-Peff