Math utils: Add clamping functions

source/blender/blenlib/BLI_math_base.h

@@ -132,6 +132,10 @@ MINLINE int max_iiii(int a, int b, int c, int d);
 MINLINE size_t min_zz(size_t a, size_t b);
 MINLINE size_t max_zz(size_t a, size_t b);
 
+MINLINE int clamp_i(int value, int min, int max);
+MINLINE float clamp_f(float value, float min, float max);
+MINLINE size_t clamp_z(size_t value, size_t min, size_t max);
+
 MINLINE int compare_ff(float a, float b, const float max_diff);
 MINLINE int compare_ff_relative(float a, float b, const float max_diff, const int max_ulps);
 

source/blender/blenlib/intern/math_base_inline.c

@@ -324,6 +324,26 @@ MINLINE size_t max_zz(size_t a, size_t b)
 	return (b < a) ? a : b;
 }
 
+MINLINE int clamp_i(int value, int min, int max)
+{
+	return min_ii(max_ii(value, min), max);
+}
+
+MINLINE float clamp_f(float value, float min, float max)
+{
+	if (value > max) {
+		return max;
+	} else if (value < min) {
+		return min;
+	}
+	return value;
+}
+
+MINLINE size_t clamp_z(size_t value, size_t min, size_t max)
+{
+	return min_zz(max_zz(value, min), max);
+}
+
 /**
  * Almost-equal for IEEE floats, using absolute difference method.
  *