From e956c20c3acdcd71229bf43edeb2de50fd730340 Mon Sep 17 00:00:00 2001
From: Jan Kadlec <jan.kadlec@nic.cz>
Date: Mon, 15 Jul 2013 13:21:29 +0200
Subject: [PATCH] Added list_is_empty function to BIRD lists.
---
src/common/lists.c | 17 +++++++++++++++++
src/common/lists.h | 1 +
2 files changed, 18 insertions(+)
diff --git a/src/common/lists.c b/src/common/lists.c
index e629e9dcc2..47503f4cec 100644
--- a/src/common/lists.c
+++ b/src/common/lists.c
@@ -177,3 +177,20 @@ size_t list_size(const list *l)
return count;
}
+
+/**
+ * list_is_empty - Checks whether the list is empty
+ * @l: list
+ *
+ * This function returns 1 if list is empty, 0 otherwise.
+ */
+int list_is_empty(const list *l)
+{
+ node *n = 0;
+ WALK_LIST(n, *l) {
+ return 0;
+ }
+
+ return 1;
+}
+
diff --git a/src/common/lists.h b/src/common/lists.h
index 392f75dd73..82c5b4dd44 100644
--- a/src/common/lists.h
+++ b/src/common/lists.h
@@ -82,6 +82,7 @@ void init_list(list *);
void insert_node(node *, node *);
void list_dup(list *dst, list *src, size_t itemsz);
size_t list_size(const list *);
+int list_is_empty(const list *l);
/*!
* \brief List item for string lists.
--
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