From 1d75ab0ada8164955ec343834b09960332b9befa Mon Sep 17 00:00:00 2001
From: Sebastian Harl <sh@tokkee.org>
Date: Thu, 2 Jan 2014 00:39:20 +0100
Subject: [PATCH] utils llist: Added sdb_llist_len().

---
 src/include/utils/llist.h | 7 +++++++
 src/utils/llist.c         | 8 ++++++++
 t/utils/llist_test.c      | 8 ++++++++
 3 files changed, 23 insertions(+)

diff --git a/src/include/utils/llist.h b/src/include/utils/llist.h
index 2742139..f33958a 100644
--- a/src/include/utils/llist.h
+++ b/src/include/utils/llist.h
@@ -203,6 +203,13 @@ sdb_llist_iter_get_next(sdb_llist_iter_t *iter);
 int
 sdb_llist_iter_remove_current(sdb_llist_iter_t *iter);
 
+/*
+ * sdb_llist_len:
+ * Return the length (number of elements) of the list.
+ */
+size_t
+sdb_llist_len(sdb_llist_t *list);
+
 #ifdef __cplusplus
 } /* extern "C" */
 #endif
diff --git a/src/utils/llist.c b/src/utils/llist.c
index 0a4665d..64f7d0c 100644
--- a/src/utils/llist.c
+++ b/src/utils/llist.c
@@ -458,5 +458,13 @@ sdb_llist_iter_remove_current(sdb_llist_iter_t *iter)
 	return 0;
 } /* sdb_llist_iter_remove */
 
+size_t
+sdb_llist_len(sdb_llist_t *list)
+{
+	if (! list)
+		return 0;
+	return list->length;
+} /* sdb_llist_len */
+
 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */
 
diff --git a/t/utils/llist_test.c b/t/utils/llist_test.c
index ede8200..ae9655a 100644
--- a/t/utils/llist_test.c
+++ b/t/utils/llist_test.c
@@ -118,6 +118,11 @@ END_TEST
 START_TEST(test_sdb_llist_append)
 {
 	size_t i;
+
+	fail_unless(sdb_llist_len(list) == 0,
+			"sdb_llist_len(<empty list>) = %zu; expected: 0",
+			sdb_llist_len(list));
+
 	for (i = 0; i < SDB_STATIC_ARRAY_LEN(golden_data); ++i) {
 		int check = sdb_llist_append(list, &golden_data[i]);
 		fail_unless(check == 0,
@@ -126,6 +131,9 @@ START_TEST(test_sdb_llist_append)
 		fail_unless(golden_data[i].ref_cnt == 2,
 				"sdb_llist_append(%s) did not take ownership",
 				golden_data[i].name);
+		fail_unless(sdb_llist_len(list) == i + 1,
+				"sdb_llist_len(<empty list>) = %zu; expected: zu",
+				sdb_llist_len(list), i + 1);
 	}
 }
 END_TEST
-- 
2.30.2