From 7c608bc1d5c126df839c699c5ae531828a00caa3 Mon Sep 17 00:00:00 2001
From: Vincent Peyruqueou
Date: Mon, 27 Mar 2023 11:12:55 +0200
Subject: Microsoft Visual Studio (2022) solution for src (lib IVY)

---
 src/timer.h | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'src/timer.h')

diff --git a/src/timer.h b/src/timer.h
index accad5b..627bdb2 100644
--- a/src/timer.h
+++ b/src/timer.h
@@ -44,6 +44,21 @@ struct timezone
   int  tz_dsttime;     /* type of dst correction */
 };
 int gettimeofday(struct timeval *tv, struct timezone *tz);
+
+/**
+ * timersub(3) from <sys/time.h>
+ */
+static inline void timersub(struct timeval* a, struct timeval* b,
+	struct timeval* res)
+{
+	res->tv_sec = a->tv_sec - b->tv_sec;
+	res->tv_usec = a->tv_usec - b->tv_usec;
+	if (res->tv_usec < 0)
+	{
+		res->tv_usec += 1000000;
+		res->tv_sec--;
+	}
+}
 #endif
 
 /* Interface avec select */
-- 
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