[PATCH v2 23/43] refs.c: move refname_is_safe to the common code

[David Turner <dturner@twopensource.com>]

This function does not contain any backend specific code so we
move it to the common code.

Signed-off-by: Ronnie Sahlberg <sahlberg@google.com>
Signed-off-by: David Turner <dturner@twopensource.com>
---
 refs-be-files.c | 33 ---------------------------------
 refs.c          | 23 +++++++++++++++++++++++
 refs.h          |  2 ++
 3 files changed, 25 insertions(+), 33 deletions(-)

diff --git a/refs-be-files.c b/refs-be-files.c
index dc89289..bb5a3ad 100644
--- a/refs-be-files.c
+++ b/refs-be-files.c
@@ -231,39 +231,6 @@ static struct ref_dir *get_ref_dir(struct ref_entry *entry)
 	return dir;
 }
 
-/*
- * Check if a refname is safe.
- * For refs that start with "refs/" we consider it safe as long they do
- * not try to resolve to outside of refs/.
- *
- * For all other refs we only consider them safe iff they only contain
- * upper case characters and '_' (like "HEAD" AND "MERGE_HEAD", and not like
- * "config").
- */
-static int refname_is_safe(const char *refname)
-{
-	if (starts_with(refname, "refs/")) {
-		char *buf;
-		int result;
-
-		buf = xmalloc(strlen(refname) + 1);
-		/*
-		 * Does the refname try to escape refs/?
-		 * For example: refs/foo/../bar is safe but refs/foo/../../bar
-		 * is not.
-		 */
-		result = !normalize_path_copy(buf, refname + strlen("refs/"));
-		free(buf);
-		return result;
-	}
-	while (*refname) {
-		if (!isupper(*refname) && *refname != '_')
-			return 0;
-		refname++;
-	}
-	return 1;
-}
-
 static struct ref_entry *create_ref_entry(const char *refname,
 					  const unsigned char *sha1, int flag,
 					  int check_name)
diff --git a/refs.c b/refs.c
index c6112ac..aa49db5 100644
--- a/refs.c
+++ b/refs.c
@@ -901,6 +901,29 @@ int head_ref_namespaced(each_ref_fn fn, void *cb_data)
 	return ret;
 }
 
+int refname_is_safe(const char *refname)
+{
+	if (starts_with(refname, "refs/")) {
+		char *buf;
+		int result;
+
+		buf = xmalloc(strlen(refname) + 1);
+		/*
+		 * Does the refname try to escape refs/?
+		 * For example: refs/foo/../bar is safe but refs/foo/../../bar
+		 * is not.
+		 */
+		result = !normalize_path_copy(buf, refname + strlen("refs/"));
+		free(buf);
+		return result;
+	}
+	while (*refname) {
+		if (!isupper(*refname) && *refname != '_')
+			return 0;
+		refname++;
+	}
+	return 1;
+}
 
 /* backend functions */
 struct ref_transaction *ref_transaction_begin(struct strbuf *err)
diff --git a/refs.h b/refs.h
index 09d140d..2bafa55 100644
--- a/refs.h
+++ b/refs.h
@@ -326,6 +326,8 @@ extern int for_each_reflog(each_ref_fn, void *);
  */
 extern int check_refname_format(const char *refname, int flags);
 
+extern int refname_is_safe(const char *refname);
+
 extern const char *prettify_refname(const char *refname);
 
 extern char *shorten_unambiguous_ref(const char *refname, int strict);
-- 
2.4.2.644.g97b850b-twtrsrc