From: Jeremy Kerr <jk@ozlabs.org>
Date: Mon, 21 Oct 2013 04:15:20 +0000 (+0800)
Subject: lib/util: Implement min & max macros
X-Git-Tag: v1.0.0~361
X-Git-Url: https://git.ozlabs.org/?p=petitboot;a=commitdiff_plain;h=e160c3eba138d22b25b95df46fdc0e7b9865d902

lib/util: Implement min & max macros

Standard type-safe min & max implementations.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
---

diff --git a/lib/util/util.h b/lib/util/util.h
index 30b472d..8c08dc5 100644
--- a/lib/util/util.h
+++ b/lib/util/util.h
@@ -30,5 +30,19 @@
 
 #define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0]))
 
+#define min(a,b) ({					\
+		typeof(a) _min_a = (a);			\
+		typeof(b) _min_b = (b);			\
+		(void)(&_min_a == &_min_b);		\
+		_min_a < _min_b ? _min_a : _min_b;	\
+		})
+
+#define max(a,b) ({					\
+		typeof(a) _max_a = (a);			\
+		typeof(b) _max_b = (b);			\
+		(void)(&_max_a == &_max_b);		\
+		_max_a > _max_b ? _max_a : _max_b;	\
+		})
+
 #endif /* UTIL_H */