[LTP] [PATCH 5/9] metadata: data_storage: Add two array functions

[Cyril Hrubis]

- data_node_array_last() returns last element in an array or NULL if empty

- data_node_array_last_rem() removes and frees last element from an array

Signed-off-by: Cyril Hrubis <chrubis@suse.cz>
---
 metadata/data_storage.h | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/metadata/data_storage.h b/metadata/data_storage.h
index e72be6187..6427ea1ed 100644
--- a/metadata/data_storage.h
+++ b/metadata/data_storage.h
@@ -251,6 +251,34 @@ static inline unsigned int data_node_array_len(struct data_node *self)
 	return self->array.array_used;
 }
 
+
+static inline struct data_node *data_node_array_last(struct data_node *self)
+{
+	if (self->type != DATA_ARRAY)
+		return NULL;
+
+	unsigned int array_used = self->array.array_used;
+	if (!array_used)
+		return NULL;
+
+	return self->array.array[array_used-1];
+}
+
+static inline void data_node_array_last_rem(struct data_node *self)
+{
+	if (self->type != DATA_ARRAY)
+		return;
+
+	unsigned int array_used = self->array.array_used;
+	if (!array_used)
+		return;
+
+	data_node_free(self->array.array[array_used-1]);
+
+	self->array.array[array_used-1] = NULL;
+	self->array.array_used--;
+}
+
 static inline void data_print_padd(unsigned int i)
 {
 	while (i-- > 0)
-- 
2.45.2