Add macros MAX() and MIN().

diff --git a/include/common.h b/include/common.h
new file mode 100644 (file)
index 0000000..23b656c
--- /dev/null
+++ b/include/common.h
@@ -0,0 +1,7 @@
+#if !defined( COMMON_H )
+#define COMMON_H
+
+#define MAX(a, b) ({ typeof(a) _a = a; typeof(b) _b = b; _a > _b? _a : _b; })
+#define MIN(a, b) ({ typeof(a) _a = a; typeof(b) _b = b; _a < _b? _a : _b; })
+
+#endif // !defined( COMMON_H )