sqwarmed/sdk_src/public/bittools.h

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2024-08-29 19:18:30 -04:00
//===== Copyright <20> 1996-2009, Valve Corporation, All rights reserved. ======//
//
// Purpose:
//
// $NoKeywords: $
//===========================================================================//
#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 //BITTOOLS_H