[openssh-commits] [openssh] 01/03: compat for timespecsub() and friends

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djm pushed a commit to branch master
in repository openssh.

commit 76292787a1e93e668f10e36b4bf59ce0ae28e156
Author: Damien Miller <djm at mindrot.org>
Date:   Thu Nov 18 09:26:20 2021 +1100

    compat for timespecsub() and friends
---
 defines.h | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/defines.h b/defines.h
index 857abb8b..36c06edd 100644
--- a/defines.h
+++ b/defines.h
@@ -532,6 +532,39 @@ struct winsize {
 	    ((tsp)->tv_sec cmp (usp)->tv_sec))
 #endif
 
+/* Operations on timespecs. */
+#ifndef timespecclear
+#define	timespecclear(tsp)		(tsp)->tv_sec = (tsp)->tv_nsec = 0
+#endif
+#ifndef timespeccmp
+#define	timespeccmp(tsp, usp, cmp)					\
+	(((tsp)->tv_sec == (usp)->tv_sec) ?				\
+	    ((tsp)->tv_nsec cmp (usp)->tv_nsec) :			\
+	    ((tsp)->tv_sec cmp (usp)->tv_sec))
+#endif
+#ifndef timespecadd
+#define	timespecadd(tsp, usp, vsp)					\
+	do {								\
+		(vsp)->tv_sec = (tsp)->tv_sec + (usp)->tv_sec;		\
+		(vsp)->tv_nsec = (tsp)->tv_nsec + (usp)->tv_nsec;	\
+		if ((vsp)->tv_nsec >= 1000000000L) {			\
+			(vsp)->tv_sec++;				\
+			(vsp)->tv_nsec -= 1000000000L;			\
+		}							\
+	} while (0)
+#endif
+#ifndef timespecsub
+#define	timespecsub(tsp, usp, vsp)					\
+	do {								\
+		(vsp)->tv_sec = (tsp)->tv_sec - (usp)->tv_sec;		\
+		(vsp)->tv_nsec = (tsp)->tv_nsec - (usp)->tv_nsec;	\
+		if ((vsp)->tv_nsec < 0) {				\
+			(vsp)->tv_sec--;				\
+			(vsp)->tv_nsec += 1000000000L;			\
+		}							\
+	} while (0)
+#endif
+
 #ifndef __P
 # define __P(x) x
 #endif

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