add clamp function

thestinger · Oct 11, 2012 · f028ce5 · f028ce5
1 parent d8e91b8
commit f028ce5
Showing 1 changed file with 16 additions and 0 deletions.
diff --git a/clamp.hh b/clamp.hh
@@ -0,0 +1,16 @@
+#ifndef CLAMP_HH
+#define CLAMP_HH
+
+#include <functional>
+
+template<typename T, typename Pred>
+T const &clamp(T const &val, T const &lo, T const &hi, Pred p) {
+  return p(val, lo) ? lo : p(hi, val) ? hi : val;
+}
+
+template<typename T>
+T const &clamp(const T &val, T const &lo, T const &hi) {
+  return clamp(val, lo, hi, std::less<T>());
+}
+
+#endif