Seaside/SpyCustom/sdk/bittools.h

#ifndef BITTOOLS_H
#define BITTOOLS_H
#ifdef _WIN32
#pragma once
#endif

namespace bittools
{
    template<int N, int C = 0>
    struct RecurseBit
    {
        enum { result = RecurseBit<N / 2, C + 1>::result };
    };

    template<int C>
    struct RecurseBit<0, C>
    {
        enum { result = C };
    };

    template<int N, int C = 1>
    struct RecursePow2
    {
        enum { result = RecursePow2<N / 2, C * 2>::result };
    };

    template<int C>
    struct RecursePow2<0, C>
    {
        enum { result = C };
    };

}

#define ROUND_TO_POWER_OF_2( n ) ( bittools::RecursePow2< (n) - 1 >::result )
#define MINIMUM_BITS_NEEDED( n ) ( bittools::RecurseBit< (n) - 1 >::result )

#endif