Util.h

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#if !defined(__Util_hdr__)
#define __Util_hdr__
 
#include <cassert>
#include <cstring>
#include <limits>
 
class CUtil
{
public:
    template<typename T>
    static T float2int (float fInput)
    {
        if (fInput >= 0.F)
            return static_cast<T>(fInput + .5F);
        else
            return static_cast<T>(fInput - .5F);
    }
    template<typename T>
    static T double2int (double fInput)
    {
        if (fInput >= 0)
            return static_cast<T>(fInput + .5);
        else
            return static_cast<T>(fInput - .5);
    }
 
    static bool isPowOf2 (int n) 
    {
        return !(n & (n-1));
    }
 
    static int nextPowOf2(int n)
    {
        int iOrder = 0;
 
        if (n == 0)
            return 0;
 
        while (n>>iOrder)
            iOrder++;
 
        if (!(n%(1<<(iOrder-1))))
            iOrder--;
 
        return (1<<(iOrder));
    }
 
    template<typename T>
    static void swap (T &tValue1, T &tValue2)
    {
        T tTmp = tValue1;
 
        tValue1 = tValue2;
        tValue2 = tTmp;
    }
};
#endif // __Util_hdr__