Re: [PATCH] document index_name_pos

[Junio C Hamano <gitster@pobox.com>]

Stefan Beller <sbeller@google.com> writes:

> Signed-off-by: Stefan Beller <sbeller@google.com>
> ---
>
>> These placeholders are meant to encourage those people who dove into
>> the code to update it, so from that point of view, I think removing
>> it is backwards.
>
> Yes, I am currently understanding and writing up documentation for
> index_name_pos. If I recall the latest discussion where we want to have
> documentation, I think a quorum favored documentation in the header itself,
> c.f. strbuf.h, string-list.h for the most desired state. (Although we do have
> Documentation/technical/api-string-list.txt as well ...)
>
> So maybe starting like this?

That is very good.  Let's drop that file from Documentation/technical
and do it like this (meaning, take both patches from you).

Thanks.


>
> Thanks,
> Stefan
>
>  cache.h | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
>
> diff --git a/cache.h b/cache.h
> index 1b67f078dd..e168e4e073 100644
> --- a/cache.h
> +++ b/cache.h
> @@ -575,7 +575,20 @@ extern int verify_path(const char *path);
>  extern int index_dir_exists(struct index_state *istate, const char *name, int namelen);
>  extern void adjust_dirname_case(struct index_state *istate, char *name);
>  extern struct cache_entry *index_file_exists(struct index_state *istate, const char *name, int namelen, int igncase);
> +
> +/*
> + * Searches for an entry defined by name and namelen in the given index.
> + * If the return value is positive (including 0) it is the position of an
> + * exact match. If the return value is negative, the negated value minus 1 is the
> + * position where the entry would be inserted.
> + * Example: In the current index we have the files a,c,d:
> + * index_name_pos(&index, "a", 1) ->  0
> + * index_name_pos(&index, "b", 1) -> -1
> + * index_name_pos(&index, "c", 1) ->  1
> + * index_name_pos(&index, "d", 1) ->  2
> + */
>  extern int index_name_pos(const struct index_state *, const char *name, int namelen);
> +
>  #define ADD_CACHE_OK_TO_ADD 1		/* Ok to add */
>  #define ADD_CACHE_OK_TO_REPLACE 2	/* Ok to replace file/directory */
>  #define ADD_CACHE_SKIP_DFCHECK 4	/* Ok to skip DF conflict checks */