#ifndef GLTB_MATHFUNCTIONS_H
#define GLTB_MATHFUNCTIONS_H

#include <float.h>

namespace gltb {
	template<typename T>
	extern inline T sgn(T a)
	{
		if(a<0) {
			return -1;
		} else if(a==0) {
			return 0;
		} else {
			return 1;
		}
	}

	template<typename T>
	extern inline T saturate(T a)
	{
	  if(a<0) {
		return 0;
	  } else if(a>1) {
		return 1;
	  }
	  return a;
	}
}

// ugly workarounds for some WIN32 specific insanity:
#ifdef WIN32
// Visual C++ may define min as a macro (bleagh!)
#ifdef min
#undef min
#endif

// Visual C++ may define max as a macro (bleagh!)
#ifdef max
#undef max
#endif

// no isnan and isinf in Visual C++
#define isnan _isnan
#define isinf(x) (!_finite(x) && !isnan(x))
#endif // WIN32

#endif /*GLTB_MATHFUNCTIONS_H_*/