struct ref_update: store refname as a FLEX_ARRAY

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 b6778aaa12c4d79cf97c31fab84ae5949371dfbb..2ff195f4711aafe99a63f4ac42dba6af4d631c33 100644 (file)
--- a/refs.c
+++ b/refs.c
@@ -3274,11 +3274,11 @@ static int update_ref_write(const char *action, const char *refname,
  * value or to zero to ensure the ref does not exist before update.
  */
 struct ref_update {
-       const char *refname;
        unsigned char new_sha1[20];
        unsigned char old_sha1[20];
        int flags; /* REF_NODEREF? */
        int have_old; /* 1 if old_sha1 is valid, 0 otherwise */
+       const char refname[FLEX_ARRAY];
 };
 
 /*
@@ -3301,12 +3301,8 @@ static void ref_transaction_free(struct ref_transaction *transaction)
 {
        int i;
 
-       for (i = 0; i < transaction->nr; i++) {
-               struct ref_update *update = transaction->updates[i];
-
-               free((char *)update->refname);
-               free(update);
-       }
+       for (i = 0; i < transaction->nr; i++)
+               free(transaction->updates[i]);
 
        free(transaction->updates);
        free(transaction);
@@ -3320,9 +3316,10 @@ void ref_transaction_rollback(struct ref_transaction *transaction)
 static struct ref_update *add_update(struct ref_transaction *transaction,
                                     const char *refname)
 {
-       struct ref_update *update = xcalloc(1, sizeof(*update));
+       size_t len = strlen(refname);
+       struct ref_update *update = xcalloc(1, sizeof(*update) + len + 1);
 
-       update->refname = xstrdup(refname);
+       strcpy((char *)update->refname, refname);
        ALLOC_GROW(transaction->updates, transaction->nr + 1, transaction->alloc);
        transaction->updates[transaction->nr++] = update;
        return update;