Re: [PATCH] string-list.h: Add STRING_LIST_INIT macro and make use of it.

[Alex Riesen <raa.lkml@gmail.com>]

On Tue, Jun 29, 2010 at 07:43, Junio C Hamano <gitster@pobox.com> wrote:
>>>
>>>    #define STRING_LIST_INIT(pleasedup) { NULL, 0, 0, (pleasedup) }
>>
>> This begs for using strdup(string-to-dup) in the macro argument, which
>> will not compile with ancient compilers which don't allow code in an
>> initializer.
>
> Err, one of us must be confused.
>
> I was suggesting to rewrite things like these, found in builtin/remote.c
> (add and rm):
>
>        struct string_list track = { NULL, 0, 0, 0 };
>        struct string_list branches = { NULL, 0, 0, 1 };
>

That must be me, again. Didn't bother to check the string_list definition
and naively assumed the pleasedup was for an initialization string. I
thought that depending on usage the caller may wish to either copy it
or leave the string_list referncing the original. Which cannot be the case
with string_list, indeed.

BTW, now that I took a look at it... The iteration over string_list
items looks a little overengineered. At least from the point of
view of the existing users of the feature. Wouldn't a simple loop
be just as simple to use (if not simplier) and faster (no uninlineable
function calls and argument preparation and passing needed)?

#define string_list_foreach(item,list) \
	for (item = (list)->items; item < (list)->items + (list)->nr; ++item)