built_in: Add min_t() and max_t() macros and use them

Introduce non-typechecking versions of min_t() and max_t() and use them
where a cast would be needed.

The macros were taken from the Linux Kernel, release under GPL v2.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>

1 files changed, 18 insertions, 0 deletions

diff --git a/built_in.h b/built_in.h
index 9f70561..6f6625e 100644
--- a/built_in.h
+++ b/built_in.h
@@ -109,6 +109,15 @@ typedef uint8_t		u8;
 	})
 #endif /* max */
 
+#ifndef max_t
+# define max_t(type, a, b)						\
+	({								\
+		type ___max1 = (a);					\
+		type ___max2 = (b);					\
+		___max1 > ___max2 ? ___max1 : ___max2;			\
+	})
+#endif /* max_t */
+
 #ifndef min
 # define min(a, b)							\
 	({								\
@@ -118,6 +127,15 @@ typedef uint8_t		u8;
 	})
 #endif /* min */
 
+#ifndef min_t
+# define min_t(type, a, b)						\
+	({								\
+		type ___min1 = (a);					\
+		type ___min2 = (b);					\
+		___min1 < ___min2 ? ___min1 : ___min2;			\
+	})
+#endif /* min_t */
+
 #ifndef ispow2
 # define ispow2(x)		({ !!((x) && !((x) & ((x) - 1))); })
 #endif