for-each-ref: introduce 'ref_array_clear()'

Introduce and implement 'ref_array_clear()' which will free
all allocated memory for 'ref_array'.

Mentored-by: Christian Couder <christian.couder@gmail.com>
Mentored-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
Signed-off-by: Karthik Nayak <karthik.188@gmail.com>
Reviewed-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin/for-each-ref.c b/builtin/for-each-ref.c
index 822838a91198d71c2a08e29ce9ef8e04579c1f95..bb83f7a952331d8a44089966ed630a77fd535c07 100644 (file)
--- a/builtin/for-each-ref.c
+++ b/builtin/for-each-ref.c
@@ -927,6 +927,26 @@ static int grab_single_ref(const char *refname, const struct object_id *oid,
        return 0;
 }
 
+/*  Free memory allocated for a ref_array_item */
+static void free_array_item(struct ref_array_item *item)
+{
+       free((char *)item->symref);
+       free(item->refname);
+       free(item);
+}
+
+/* Free all memory allocated for ref_array */
+void ref_array_clear(struct ref_array *array)
+{
+       int i;
+
+       for (i = 0; i < array->nr; i++)
+               free_array_item(array->items[i]);
+       free(array->items);
+       array->items = NULL;
+       array->nr = array->alloc = 0;
+}
+
 static int cmp_ref_sort(struct ref_sort *s, struct ref_array_item *a, struct ref_array_item *b)
 {
        struct atom_value *va, *vb;
@@ -1157,5 +1177,6 @@ int cmd_for_each_ref(int argc, const char **argv, const char *prefix)
                maxcount = ref_cbdata.array.nr;
        for (i = 0; i < maxcount; i++)
                show_ref(ref_cbdata.array.items[i], format, quote_style);
+       ref_array_clear(&ref_cbdata.array);
        return 0;
 }