[PATCH v1] dir: create function count_slashes

[PATCH v1] dir: create function count_slashes

[Prathamesh Chavan]

Similar functions exist in apply.c and builtin/show-branch.c for
counting the number of slashes in a string. Also in the later
patches, we introduce a third caller for the same. Hence, we unify
it now by cleaning the existing functions and declaring a common
function count_slashes in dir.h and implementing it in dir.c to
remove this code duplication.

Mentored-by: Christian Couder <christian.couder@gmail.com>
Mentored-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Prathamesh Chavan <pc44800@gmail.com>
---
In future, I intend to use this function in builtin/submodule--helper.c
as well, hence this change was introduced now.

The patch passes all the tests.
Complete build report of this patch is available at:
https://travis-ci.org/pratham-pc/git/builds
Branch: count_slashes
Build #97

 apply.c               | 11 -----------
 builtin/show-branch.c | 13 +++----------
 dir.c                 |  9 +++++++++
 dir.h                 |  3 +++
 4 files changed, 15 insertions(+), 21 deletions(-)

diff --git a/apply.c b/apply.c
index c49cef063..121e53406 100644
--- a/apply.c
+++ b/apply.c
@@ -762,17 +762,6 @@ static char *find_name_traditional(struct apply_state *state,
 	return find_name_common(state, line, def, p_value, line + len, 0);
 }
 
-static int count_slashes(const char *cp)
-{
-	int cnt = 0;
-	char ch;
-
-	while ((ch = *cp++))
-		if (ch == '/')
-			cnt++;
-	return cnt;
-}
-
 /*
  * Given the string after "--- " or "+++ ", guess the appropriate
  * p_value for the given patch.
diff --git a/builtin/show-branch.c b/builtin/show-branch.c
index 4a6cc6f49..3636a0559 100644
--- a/builtin/show-branch.c
+++ b/builtin/show-branch.c
@@ -5,6 +5,7 @@
 #include "color.h"
 #include "argv-array.h"
 #include "parse-options.h"
+#include "dir.h"
 
 static const char* show_branch_usage[] = {
     N_("git show-branch [-a | --all] [-r | --remotes] [--topo-order | --date-order]\n"
@@ -421,14 +422,6 @@ static int append_tag_ref(const char *refname, const struct object_id *oid,
 
 static const char *match_ref_pattern = NULL;
 static int match_ref_slash = 0;
-static int count_slash(const char *s)
-{
-	int cnt = 0;
-	while (*s)
-		if (*s++ == '/')
-			cnt++;
-	return cnt;
-}
 
 static int append_matching_ref(const char *refname, const struct object_id *oid,
 			       int flag, void *cb_data)
@@ -438,7 +431,7 @@ static int append_matching_ref(const char *refname, const struct object_id *oid,
 	 * refs/tags/v0.99.9a and friends.
 	 */
 	const char *tail;
-	int slash = count_slash(refname);
+	int slash = count_slashes(refname);
 	for (tail = refname; *tail && match_ref_slash < slash; )
 		if (*tail++ == '/')
 			slash--;
@@ -529,7 +522,7 @@ static void append_one_rev(const char *av)
 		int saved_matches = ref_name_cnt;
 
 		match_ref_pattern = av;
-		match_ref_slash = count_slash(av);
+		match_ref_slash = count_slashes(av);
 		for_each_ref(append_matching_ref, NULL);
 		if (saved_matches == ref_name_cnt &&
 		    ref_name_cnt < MAX_REVS)
diff --git a/dir.c b/dir.c
index 9efcf1eab..4a953c16a 100644
--- a/dir.c
+++ b/dir.c
@@ -52,6 +52,15 @@ static enum path_treatment read_directory_recursive(struct dir_struct *dir,
 static int get_dtype(struct dirent *de, struct index_state *istate,
 		     const char *path, int len);
 
+int count_slashes(const char *s)
+{
+	int cnt = 0;
+	while (*s)
+		if (*s++ == '/')
+			cnt++;
+	return cnt;
+}
+
 int fspathcmp(const char *a, const char *b)
 {
 	return ignore_case ? strcasecmp(a, b) : strcmp(a, b);
diff --git a/dir.h b/dir.h
index a89c13e27..e3717055d 100644
--- a/dir.h
+++ b/dir.h
@@ -197,6 +197,9 @@ struct dir_struct {
 	unsigned unmanaged_exclude_files;
 };
 
+/*Count the number of slashes for string s*/
+extern int count_slashes(const char *s);
+
 /*
  * The ordering of these constants is significant, with
  * higher-numbered match types signifying "closer" (i.e. more
-- 
2.13.0

Re: [PATCH v1] dir: create function count_slashes

[Stefan Beller]

On Thu, Jun 8, 2017 at 11:08 AM, Prathamesh Chavan <pc44800@gmail.com> wrote:
> Similar functions exist in apply.c and builtin/show-branch.c for
> counting the number of slashes in a string. Also in the later
> patches, we introduce a third caller for the same. Hence, we unify
> it now by cleaning the existing functions and declaring a common
> function count_slashes in dir.h and implementing it in dir.c to
> remove this code duplication.
>
> Mentored-by: Christian Couder <christian.couder@gmail.com>
> Mentored-by: Stefan Beller <sbeller@google.com>
> Signed-off-by: Junio C Hamano <gitster@pobox.com>
> Signed-off-by: Prathamesh Chavan <pc44800@gmail.com>
> ---
> In future, I intend to use this function in builtin/submodule--helper.c
> as well, hence this change was introduced now.
>

Thanks for upstreaming this early!

I think this is a good change even
without the submodule work thrown into the soup as well,
but with the given promise to have it used a third time this
is a no-brainer later on.