1 files changed, 23 insertions, 0 deletions
diff --git a/timespec2timeval.c b/timespec2timeval.c
new file mode 100644
index 0000000..c4069ff
--- /dev/null
+++ b/timespec2timeval.c
@@ -0,0 +1,23 @@
+/* See LICENSE file for copyright and license details. */
+#include "libsimple.h"
+
+
+int
+libsimple_timespec2timeval(struct timeval *restrict tv, const struct timespec *restrict ts)
+{
+        tv->tv_sec = ts->tv_sec;
+        tv->tv_usec = ts->tv_nsec / 1000L;
+        if ((ts->tv_nsec % 1000L) >= 500L) {
+                if (++(tv->tv_usec) == 1000000L) {
+                        tv->tv_usec = 0;
+                        if (tv->tv_sec == TIME_MAX) {
+                                tv->tv_usec = 999999L;
+                                errno = EOVERFLOW;
+                                return -1;
+                        } else {
+                                tv->tv_sec += 1;
+                        }
+                }
+        }
+        return 0;
+}