added some comments and formatting

app/util.h

@@ -25,34 +25,53 @@ namespace UTILITY_FUNCTIONS {
 // if so - x will be returned
 // if not - lo will be returned if x is smaller than lo
 //        - hi will be returned if x is greater than hi
-inline double limit(double x, double lo, double hi) {
+inline double limit(double x, double lo, double hi)
+{
     return (x < lo) ? lo : (x > hi) ? hi : x;
 }
 
-inline double max3(double a, double b, double c) {
+
+// determine the maximum of the 3 parameters
+inline double max3(double a, double b, double c)
+{
     return std::max(a, std::max(b, c));
 }
-inline double min3(double a, double b, double c) {
+
+
+// determine the minimum of the 3 parameters
+inline double min3(double a, double b, double c)
+{
     return std::min(a, std::min(b, c));
 }
 
 
-inline bool is_valid(double x) { return std::isfinite(x); }
+inline bool is_valid(double x)
+{
+    return std::isfinite(x);
+}
 
 // ST: REAL_TO_INT(x) i.d.R. trunc Richtung 0. Bei Siemens oft ROUND? Du nutzt
 // häufig +0.5.
-inline int real_to_int(double x) { return static_cast<int>(x); }
+inline int real_to_int(double x)
+{
+    return static_cast<int>(x);
+}
 
 // Platzhalter für GET_VALUE_* (kommt vermutlich aus Parameter-/Recipe-System)
-inline std::int32_t GET_VALUE_DINT(int /*a*/, int /*b*/, int /*c*/, int /*d*/) {
+inline int32_t GET_VALUE_DINT(int /*a*/, int /*b*/, int /*c*/, int /*d*/)
+{
     // TODO: an dein Parameter-System anbinden
     return 0;
 }
-inline double GET_VALUE_REAL(int /*a*/, int /*b*/, int /*c*/, int /*d*/) {
+
+inline double GET_VALUE_REAL(int /*a*/, int /*b*/, int /*c*/, int /*d*/)
+{
     // TODO: an dein Parameter-System anbinden
     return 0.0;
 }
 
+
+// UJ: not yet needed, maybe future use - leave it for now
 class Util{
 public: