tools: Add min_t, max_t, clamp and clamp_t macros

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

1 files changed, 39 insertions, 2 deletions

diff --git a/isp/tools.h b/isp/tools.h
index b60cc2e..af29dd9 100644
--- a/isp/tools.h
+++ b/isp/tools.h
@@ -25,8 +25,45 @@
 
 #define ARRAY_SIZE(array)	(sizeof(array) / sizeof((array)[0]))
 
-#define min(a, b)		((a) < (b) ? (a) : (b))
-#define max(a, b)		((a) > (b) ? (a) : (b))
+#define min(a, b) ({				\
+	typeof(a) __a = (a);			\
+	typeof(b) __b = (b);			\
+	__a < __b ? __a : __b;			\
+})
+
+#define min_t(type, a, b) ({			\
+	type __a = (a);				\
+	type __b = (b);				\
+	__a < __b ? __a : __b;			\
+})
+
+#define max(a, b) ({				\
+	typeof(a) __a = (a);			\
+	typeof(b) __b = (b);			\
+	__a > __b ? __a : __b;			\
+})
+
+#define max_t(type, a, b) ({			\
+	type __a = (a);				\
+	type __b = (b);				\
+	__a > __b ? __a : __b;			\
+})
+
+#define clamp(val, min, max) ({			\
+	typeof(val) __val = (val);		\
+	typeof(min) __min = (min);		\
+	typeof(max) __max = (max);		\
+	__val = __val < __min ? __min : __val;	\
+	__val > __max ? __max : __val;		\
+})
+
+#define clamp_t(type, val, min, max) ({		\
+	type __val = (val);			\
+	type __min = (min);			\
+	type __max = (max);			\
+	__val = __val < __min ? __min : __val;	\
+	__val > __max ? __max : __val;		\
+})
 
 #define container_of(ptr, type, member) \
 	(type *)((char *)(ptr) - offsetof(type, member))