From 8c6b2f399b79315317013e8d0b2ba2efac435fd3 Mon Sep 17 00:00:00 2001
From: Pim van Pelt <pim@ipng.nl>
Date: Sun, 4 Nov 2018 19:55:54 +0100
Subject: [PATCH] add timespec_empty()

---
 include/timespec.h | 1 +
 src/timespec.c     | 8 ++++++++
 2 files changed, 9 insertions(+)

diff --git a/include/timespec.h b/include/timespec.h
index 97330cf..e58fe6a 100644
--- a/include/timespec.h
+++ b/include/timespec.h
@@ -43,6 +43,7 @@ struct mgos_timespec;
 
 struct mgos_timespec *timespec_create();
 bool timespec_destroy(struct mgos_timespec **ts);
+bool timespec_empty(struct mgos_timespec *ts);
 bool timespec_add_spec(struct mgos_timespec *ts, const char *spec);
 bool timespec_clear_spec(struct mgos_timespec *ts);
 bool timespec_get_spec(struct mgos_timespec *ts, char *ret, int retlen);
diff --git a/src/timespec.c b/src/timespec.c
index 9cbb7b2..481f037 100644
--- a/src/timespec.c
+++ b/src/timespec.c
@@ -216,6 +216,14 @@ bool timespec_clear_spec(struct mgos_timespec *ts) {
   return true;
 }
 
+// Return true if the timespec is empty
+bool timespec_empty(struct mgos_timespec *ts) {
+  if (!ts) {
+    return true;
+  }
+  return SLIST_EMPTY(&ts->specs);
+}
+
 // Return a null terminated string in 'ret' of max retlen-1 which is a
 // comma separated set of timespec elements from the linked list.
 // Returns true on success, false otherwise.