mathutil.h

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#ifndef CPPAPE_MATHUTIL_H
#define CPPAPE_MATHUTIL_H
 
#include <cmath>
#include <algorithm>
 
namespace ape
{
    inline std::size_t clamp_available(std::size_t position, std::size_t size, std::size_t available)
    {
        return std::min(available, size - position);
    }
 
    inline size_t nextpow2(size_t current)
    {
        size_t p = 1;
        while (p < current)
            p <<= 1;
        return p;
    }
 
    inline size_t nextpow2above(size_t current)
    {
        size_t p = 1;
        while (p <= current)
            p <<= 1;
        return p;
    }
 
    template<typename UIntType>
    inline typename std::enable_if<std::is_unsigned<UIntType>::value, bool>::type ispow2(UIntType t)
    {
        return (t & (t - 1)) == 0;
    }
}
 
#endif