Stefan Beller <sbel...@google.com> writes: > Signed-off-by: Stefan Beller <sbel...@google.com> > --- > cache.h | 19 +++++++++++++++++++ > 1 file changed, 19 insertions(+) > > diff --git a/cache.h b/cache.h > index 1b67f078dd..1469ddeafe 100644 > --- a/cache.h > +++ b/cache.h > @@ -575,7 +575,26 @@ 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.
So if the return value is -3, you negate it to get 3 and then subtract 1 to get 2. The function is telling you that "e" will sit at active_cache[2] in the following example. Which is correct. > + * Example: The current index consists of these files and its stages: > + * > + * b#0, d#0, f#1, f#3 > + * > + * index_name_pos(&index, "a", 1) -> -1 > + * index_name_pos(&index, "b", 1) -> 0 > + * index_name_pos(&index, "c", 1) -> -2 > + * index_name_pos(&index, "d", 1) -> 1 > + * index_name_pos(&index, "e", 1) -> -3 > + * index_name_pos(&index, "f", 1) -> -3 > + * index_name_pos(&index, "g", 1) -> -5 > + */ This time the counting seems correct. Thanks.
