clamp.hpp

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#ifndef MLPACK_CORE_MATH_CLAMP_HPP
#define MLPACK_CORE_MATH_CLAMP_HPP
 
#include <stdlib.h>
#include <math.h>
#include <float.h>
 
namespace mlpack {
namespace math  {
 
inline double ClampNonNegative(const double d)
{
  return (d + fabs(d)) / 2;
}
 
inline double ClampNonPositive(const double d)
{
  return (d - fabs(d)) / 2;
}
 
inline double ClampRange(double value,
                         const double rangeMin,
                         const double rangeMax)
{
  value -= rangeMax;
  value = ClampNonPositive(value) + rangeMax;
  value -= rangeMin;
  value = ClampNonNegative(value) + rangeMin;
  return value;
}
 
} // namespace math
} // namespace mlpack
 
#endif // MLPACK_CORE_MATH_CLAMP_HPP