base_maths.h

#ifndef BASIC_MATHS_HEADER_INCLUDED
#define BASIC_MATHS_HEADER_INCLUDED

#include <limits>
#include <cmath>

namespace Geometry
{
	inline float Sqrt( float f )
	{
		return sqrtf( f );
	}

	inline double Sqrt( double f )
	{
		return sqrt( f );
	}
    
    inline float Fabs( float f )
    {
        return fabsf( f );
    }
    
    inline double Fabs( double f )
    {
        return fabs( f );
    }
    
	// http://www.codecodex.com/wiki/index.php?title=Calculate_an_integer_square_root
	inline int Sqrt( int x )
	{
		unsigned long op, res, one;
		op = x;
	    res = 0;
		
		one = 1 << 30;
		while (one > op) one >>= 2;
	    while (one != 0) {
		    if (op >= res + one) {
			    op = op - (res + one);
				res = res +  2 * one;
			}
			res >>= 1;
			one >>= 2;
		}
		return int(res);
	}

    inline float Sin( float f )
    {
        return sinf(f);
    }
 
    inline float Cos( float f )
    {
        return cosf(f);
    }

    inline double Sin( double d )
    {
        return sin(d);
    }

    inline double Cos( double d )
    {
        return cos(d);
    }

    inline int Abs( int i )
    {
        return abs(i);
    }

    inline float Abs( float f )
    {
        return fabs(f);
    }

    inline double Abs( double d )
    {
        return fabs(d);
    }

    inline double Pow( double b, double e )
    {
        return pow(b,e);
    }

    inline float Pow( float b, float e )
    {
        return pow(b,e);
    }

    inline int iPow( int b, int e )
    {
        int result = 1;
        while (e)
        {
            if (e & 1)
                result *= b;
            e >>= 1;
            b *= b;
        }
        return result;
    }

    inline int Pow( int b, int e )
    {
        return iPow(b,e);
    }

}

#endif //BASIC_MATHS_HEADER_INCLUDED