get_packed_ref(): return a ref_entry

Instead of copying the reference's SHA1 into a caller-supplied
variable, just return the ref_entry itself (or NULL if there is no
such entry).  This change will allow the function to be used from
elsewhere.

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/refs.c b/refs.c
index ea209e4907be728b4c4f1a3e4a9d7499092a50b0..fbcc044eecb163d44f445b2d48b9752a2b6140d7 100644 (file)
--- a/refs.c
+++ b/refs.c
@@ -1101,18 +1101,12 @@ int resolve_gitlink_ref(const char *path, const char *refname, unsigned char *sh
 }
 
 /*
- * Try to read ref from the packed references.  On success, set sha1
- * and return 0; otherwise, return -1.
+ * Return the ref_entry for the given refname from the packed
+ * references.  If it does not exist, return NULL.
  */
-static int get_packed_ref(const char *refname, unsigned char *sha1)
+static struct ref_entry *get_packed_ref(const char *refname)
 {
-       struct ref_dir *packed = get_packed_refs(get_ref_cache(NULL));
-       struct ref_entry *entry = find_ref(packed, refname);
-       if (entry) {
-               hashcpy(sha1, entry->u.value.sha1);
-               return 0;
-       }
-       return -1;
+       return find_ref(get_packed_refs(get_ref_cache(NULL)), refname);
 }
 
 const char *resolve_ref_unsafe(const char *refname, unsigned char *sha1, int reading, int *flag)
@@ -1140,13 +1134,17 @@ const char *resolve_ref_unsafe(const char *refname, unsigned char *sha1, int rea
                git_snpath(path, sizeof(path), "%s", refname);
 
                if (lstat(path, &st) < 0) {
+                       struct ref_entry *entry;
+
                        if (errno != ENOENT)
                                return NULL;
                        /*
                         * The loose reference file does not exist;
                         * check for a packed reference.
                         */
-                       if (!get_packed_ref(refname, sha1)) {
+                       entry = get_packed_ref(refname);
+                       if (entry) {
+                               hashcpy(sha1, entry->u.value.sha1);
                                if (flag)
                                        *flag |= REF_ISPACKED;
                                return refname;