1 files changed, 108 insertions, 0 deletions
diff --git a/lib/ccan/time/time.c b/lib/ccan/time/time.c
new file mode 100644
index 0000000000..5e36bf7b48
--- /dev/null
+++ b/lib/ccan/time/time.c
@@ -0,0 +1,108 @@
+/* Licensed under BSD-MIT - see LICENSE file for details */
+#include <ccan/time/time.h>
+#include <stdlib.h>
+#include <assert.h>
+
+struct timeval time_now(void)
+{
+	struct timeval now;
+	gettimeofday(&now, NULL);
+	return now;
+}
+
+bool time_greater(struct timeval a, struct timeval b)
+{
+	if (a.tv_sec > b.tv_sec)
+		return true;
+	else if (a.tv_sec < b.tv_sec)
+		 return false;
+
+	return a.tv_usec > b.tv_usec;
+}
+
+bool time_less(struct timeval a, struct timeval b)
+{
+	if (a.tv_sec < b.tv_sec)
+		return true;
+	else if (a.tv_sec > b.tv_sec)
+		 return false;
+
+	return a.tv_usec < b.tv_usec;
+}
+
+bool time_eq(struct timeval a, struct timeval b)
+{
+	return a.tv_sec == b.tv_sec && a.tv_usec == b.tv_usec;
+}
+
+struct timeval time_sub(struct timeval recent, struct timeval old)
+{
+	struct timeval diff;
+
+	diff.tv_sec = recent.tv_sec - old.tv_sec;
+	if (old.tv_usec > recent.tv_usec) {
+		diff.tv_sec--;
+		diff.tv_usec = 1000000 + recent.tv_usec - old.tv_usec;
+	} else
+		diff.tv_usec = recent.tv_usec - old.tv_usec;
+
+	assert(diff.tv_sec >= 0);
+	return diff;
+}
+
+struct timeval time_add(struct timeval a, struct timeval b)
+{
+	struct timeval sum;
+
+	sum.tv_sec = a.tv_sec + b.tv_sec;
+	sum.tv_usec = a.tv_usec + b.tv_usec;
+	if (sum.tv_usec > 1000000) {
+		sum.tv_sec++;
+		sum.tv_usec -= 1000000;
+	}
+	return sum;
+}
+
+struct timeval time_divide(struct timeval t, unsigned long div)
+{
+	return time_from_usec(time_to_usec(t) / div);
+}
+
+struct timeval time_multiply(struct timeval t, unsigned long mult)
+{
+	return time_from_usec(time_to_usec(t) * mult);
+}
+
+uint64_t time_to_msec(struct timeval t)
+{
+	uint64_t msec;
+
+	msec = t.tv_usec / 1000 + (uint64_t)t.tv_sec * 1000;
+	return msec;
+}
+
+uint64_t time_to_usec(struct timeval t)
+{
+	uint64_t usec;
+
+	usec = t.tv_usec + (uint64_t)t.tv_sec * 1000000;
+	return usec;
+}
+
+struct timeval time_from_msec(uint64_t msec)
+{
+	struct timeval t;
+
+	t.tv_usec = (msec % 1000) * 1000;
+	t.tv_sec = msec / 1000;
+	return t;
+}
+
+struct timeval time_from_usec(uint64_t usec)
+{
+	struct timeval t;
+
+	t.tv_usec = usec % 1000000;
+	t.tv_sec = usec / 1000000;
+	return t;
+}