rsys

commit 50852b9b06ec83a17ec6f8c14b1934dd646c3100
parent ce6c48c98608319cecd4c49a0453279196d162c7
Author: vaplv <vaplv@free.fr>
Date:   Sun,  8 Jun 2014 15:54:54 +0200

Add and test the CLAMP macro

Diffstat:
M
cmake/CMakeLists.txt
 | 
1
+
M
src/math.h
 | 
1
+
M
src/test_math.c
 | 
8
++++++++

3 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/cmake/CMakeLists.txt b/cmake/CMakeLists.txt
@@ -62,6 +62,7 @@ set(RSYS_FILES_INC_COMMON
   clock_time.h
   dynamic_array.h
   dynamic_array_char.h
+  dynamic_array_uchar.h
   dynamic_array_u64.h
   free_list.h
   hash.h
diff --git a/src/math.h b/src/math.h
@@ -5,6 +5,7 @@
 
 #define MMAX(A, B) ((A) > (B) ? (A) : (B))
 #define MMIN(A, B) ((A) < (B) ? (A) : (B))
+#define CLAMP(A, Min, Max) MMIN(MMAX(Min, A), Max)
 #define IS_POW2(A) (((A) & ((A)-1)) == 0 && (A) > 0)
 #define INF (1.0/0.0)
 #define IS_INF(X) ((X==INF) || (X==-INF))
diff --git a/src/test_math.c b/src/test_math.c
@@ -16,6 +16,14 @@ main(int argc, char** argv)
   CHECK(MMIN(-10, 0), -10);
   CHECK(MMIN(10, 0), 0);
 
+  CHECK(CLAMP(0.1f, 0.f, 1.f), 0.1f);
+  CHECK(CLAMP(-0.1f, 0.f, 1.f), 0.f);
+  CHECK(CLAMP(1.2f, 0.f, 1.f), 1.f);
+  CHECK(CLAMP(1.f, 0.f, 1.f), 1.f);
+  CHECK(CLAMP(0, -127, 127), 0);
+  CHECK(CLAMP(255, -127, 127), 127);
+  CHECK(CLAMP(-255, -127, 127), -127);
+
   NCHECK(eq_eps((float)PI, 3.14159265358979323846f, 1.e-6f), 0);
   NCHECK(eq_eps((float)RCP_PI, 1.f / (float)PI, 1.e-6f), 0);