From 262311a02c4bcf001d1b2a4ce496a5a83ec4f9e1 Mon Sep 17 00:00:00 2001
From: dzwdz
Date: Tue, 21 Sep 2021 18:11:10 +0200
Subject: implement (safe) min/max macros

---
 src/kernel/util.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'src/kernel/util.h')

diff --git a/src/kernel/util.h b/src/kernel/util.h
index b50810d..839aa49 100644
--- a/src/kernel/util.h
+++ b/src/kernel/util.h
@@ -8,3 +8,13 @@ void *memcpy(void *dest, const void *src, size_t n);
 void *memset(void *s, int c, size_t n);
 
 int memcmp(const void *s1, const void *s2, size_t n);
+
+// see https://gcc.gnu.org/onlinedocs/gcc/Typeof.html
+#define min(a,b) ({ \
+		typeof (a) _a = (a); \
+		typeof (b) _b = (b); \
+		_a < _b ? _a : _b; })
+#define max(a,b) ({ \
+		typeof (a) _a = (a); \
+		typeof (b) _b = (b); \
+		_a > _b ? _a : _b; })
-- 
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