1 files changed, 3 insertions, 1 deletions
diff --git a/tools.h b/tools.h
index 52bf8a7f..49981414 100644
--- a/tools.h
+++ b/tools.h
@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: tools.h 2.15 2012/02/18 15:29:50 kls Exp $
+ * $Id: tools.h 2.16 2012/02/29 10:41:00 kls Exp $
  */
 
 #ifndef __TOOLS_H
@@ -57,6 +57,8 @@ template<class T> inline int sgn(T a) { return a < 0 ? -1 : a > 0 ? 1 : 0; }
 template<class T> inline void swap(T &a, T &b) { T t = a; a = b; b = t; }
 #endif
 
+template<class T> inline T constrain(T v, T l, T h) { return v < l ? l : v > h ? h : v; }
+
 void syslog_with_tid(int priority, const char *format, ...) __attribute__ ((format (printf, 2, 3)));
 
 #define BCDCHARTOINT(x) (10 * ((x & 0xF0) >> 4) + (x & 0xF))