From 64ea8829af8719c0dc1eb7c0d2c9933a7b3d6e04 Mon Sep 17 00:00:00 2001
From: Nicholas Marriott <nicholas.marriott@gmail.com>
Date: Thu, 28 Mar 2013 00:00:13 +0000
Subject: Add define for timersub to compat.h.

---
 compat.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'compat.h')

diff --git a/compat.h b/compat.h
index b9ee7ba1..622006e1 100644
--- a/compat.h
+++ b/compat.h
@@ -152,6 +152,18 @@ typedef uint64_t u_int64_t;
 	} while (0)
 #endif
 
+#ifndef timersub
+#define timersub(tvp, uvp, vvp)                                         \
+	do {                                                            \
+		(vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec;          \
+		(vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec;       \
+		if ((vvp)->tv_usec < 0) {                               \
+			(vvp)->tv_sec--;                                \
+			(vvp)->tv_usec += 1000000;                      \
+		}                                                       \
+	} while (0)
+#endif
+
 #ifndef TTY_NAME_MAX
 #define TTY_NAME_MAX 32
 #endif
-- 
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