From c7be3dcd5bbf1bab69c5be60d28049934e7ea75d Mon Sep 17 00:00:00 2001
From: Bananymous <oskari.alaranta@bananymous.com>
Date: Tue, 27 May 2025 07:10:30 +0300
Subject: [PATCH] LibC: Add timer{add,sub,clear,isset,cmp}

These are not POSIX but used by used by some ports
---
 userspace/libraries/LibC/include/sys/time.h | 30 +++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/userspace/libraries/LibC/include/sys/time.h b/userspace/libraries/LibC/include/sys/time.h
index 8deb916e..458bde62 100644
--- a/userspace/libraries/LibC/include/sys/time.h
+++ b/userspace/libraries/LibC/include/sys/time.h
@@ -33,6 +33,36 @@ int gettimeofday(struct timeval* __restrict tp, void* __restrict tzp);
 int setitimer(int which, const struct itimerval* __restrict value, struct itimerval* __restrict ovalue);
 int utimes(const char* path, const struct timeval times[2]);
 
+#define timeradd(a, b, res) \
+	do { \
+		(res)->tv_sec  = (a)->tv_sec  + (b)->tv_sec; \
+		(res)->tv_usec = (a)->tv_usec + (b)->tv_usec; \
+		(res)->tv_sec += (res)->tv_usec / 1000000; \
+		(res)->tv_usec %= 1000000; \
+	} while (0)
+
+#define timersub(a, b, res) \
+	do { \
+		(res)->tv_sec  = (a)->tv_sec  - (b)->tv_sec; \
+		(res)->tv_usec = (a)->tv_usec - (b)->tv_usec; \
+		(res)->tv_sec += (res)->tv_usec / 1000000; \
+		(res)->tv_usec %= 1000000; \
+	} while (0)
+
+#define timerclear(tvp) \
+	do { \
+		(tvp)->tv_sec = 0; \
+		(tvp)->tv_usec = 0; \
+	} while (0)
+
+#define timerisset(tvp) \
+	((tvp)->tv_sec || (tvp)->tv_usec)
+
+#define timercmp(a, b, CMP) \
+	(((a)->tv_sec == (b)->tv_sec) \
+		? ((a)->tv_usec CMP (b)->tv_usec) \
+		: ((a)->tv_sec  CMP (b)->tv_sec))
+
 __END_DECLS
 
 #endif