Re: [PATCH v4 5/6] convert: add 'working-tree-encoding' attribute

On Mon, Jan 22, 2018 at 07:54:01PM -0500, Jeff King wrote:

But anyway, that was a bit of a tangent. Certainly the smaller change is
just standardizing on sizeof(*foo), which I think most people agree on
at this point. It might be worth putting in CodingGuidelines.

Personally I prefer sizeof(*foo) which is a well non-idiom, used
in many projects and IMHO easy to read and understand.

I've played a little with coccinelle and the following spatch
seems to catch many occurrences of sizeof(struct ..) (the first
hunk seems to expand multiple times causing conflicts in the
generated patch). Cases like a->b = xcalloc() are not matched, I
don't know enough coccinelle for that. If there's interest I
could prepare patches, but it will create quite some code churn.

Regards
Simon

@@
type T;
identifier x;
@@
- T *x = xmalloc(sizeof(T));
+ T *x = xmalloc(sizeof(*x));

@@
type T;
T *x;
@@
- x = xmalloc(sizeof(T));
+ x = xmalloc(sizeof(*x));


@@
type T;
identifier x;
expression n;
@@
- T *x = xcalloc(n, sizeof(T));
+ T *x = xcalloc(n, sizeof(*x));

@@
type T;
T *x;
expression n;
@@
- x = xcalloc(n, sizeof(T));
+ x = xcalloc(n, sizeof(*x));


@@
type T;
T x;
@@
- memset(&x, 0, sizeof(T));
+ memset(&x, 0, sizeof(x));

@@
type T;
T *x;
@@
- memset(x, 0, sizeof(T));
+ memset(x, 0, sizeof(*x));

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