dir.[ch]: replace dir_init() with DIR_INIT

Remove the dir_init() function and replace it with a DIR_INIT
macro. In many cases in the codebase we need to initialize things with
a function for good reasons, e.g. needing to call another function on
initialization. The "dir_init()" function was not one such case, and
could trivially be replaced with a more idiomatic macro initialization
pattern.

The only place where we made use of its use of memset() was in
dir_clear() itself, which resets the contents of an an existing struct
pointer. Let's use the new "memcpy() a 'blank' struct on the stack"
idiom to do that reset.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/dir.h b/dir.h
index e3db9b9ec6..8d0ddd8f18 100644
--- a/dir.h
+++ b/dir.h
@@ -342,6 +342,8 @@ struct dir_struct {
 	unsigned visited_directories;
 };
 
+#define DIR_INIT { 0 }
+
 struct dirent *readdir_skip_dot_and_dotdot(DIR *dirp);
 
 /*Count the number of slashes for string s*/
@@ -367,8 +369,6 @@ int match_pathspec(struct index_state *istate,
 int report_path_error(const char *ps_matched, const struct pathspec *pathspec);
 int within_depth(const char *name, int namelen, int depth, int max_depth);
 
-void dir_init(struct dir_struct *dir);
-
 int fill_directory(struct dir_struct *dir,
 		   struct index_state *istate,
 		   const struct pathspec *pathspec);