From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Mon, 21 Apr 2014 23:15:50 +0000 (+0100)
Subject: util.h: Provide MIN and MAX macros
X-Git-Tag: debian/0.3.1_beta1~7
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=secnet.git;a=commitdiff_plain;h=ceb05e5ddbc5f140b1320c29a8b5841e61bc8250;hp=a0b107b8722e92aa3f29945239ce6793bf5ea877

util.h: Provide MIN and MAX macros

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
---

diff --git a/util.h b/util.h
index 816c056..1f43c5e 100644
--- a/util.h
+++ b/util.h
@@ -51,4 +51,12 @@ extern void send_nak(const struct comm_addr *dest, uint32_t our_index,
 
 extern int consttime_memeq(const void *s1, const void *s2, size_t n);
 
+#define MINMAX(ae,be,op) ({			\
+	typeof((ae)) a=(ae);			\
+	typeof((be)) b=(be);			\
+	a op b ? a : b;				\
+    })
+#define MAX(a,b) MINMAX((a),(b),>)
+#define MIN(a,b) MINMAX((a),(b),<)
+
 #endif /* util_h */