[PATCH v6 05/11] for-each-ref: introduce 'ref_array_clear()'

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

Mentored-by: Christian Couder <christian.couder@xxxxxxxxx>
Mentored-by: Matthieu Moy <matthieu.moy@xxxxxxxxxxxxxxx>
Signed-off-by: Karthik Nayak <karthik.188@xxxxxxxxx>
---
 builtin/for-each-ref.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/builtin/for-each-ref.c b/builtin/for-each-ref.c
index 42a89cd..a65a4db 100644
--- a/builtin/for-each-ref.c
+++ b/builtin/for-each-ref.c
@@ -926,6 +926,26 @@ 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(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;
@@ -1156,5 +1176,6 @@ 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;
 }
-- 
2.4.2

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