genesis-3d_engine/Engine/foundation/util/round.h

#pragma once
/****************************************************************************
Copyright (c) 2009, Radon Labs GmbH
Copyright (c) 2011-2013,WebJet Business Division,CYOU
 
http://www.genesis-3d.com.cn

Permission is hereby granted, free of charge, to any person obtaining a copy
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The above copyright notice and this permission notice shall be included in
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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****************************************************************************/

#include "core/types.h"

//------------------------------------------------------------------------------
namespace Util
{
class Round
{
public:
    /// round up to nearest 2 bytes boundary
    static uint RoundUp2(uint val);
    /// round up to nearest 4 bytes boundary
    static uint RoundUp4(uint val);
    /// round up to nearest 8 bytes boundary
    static uint RoundUp8(uint val);
    /// round up to nearest 16 bytes boundary
    static uint RoundUp16(uint val);
    /// round up to nearest 32 bytes boundary
    static uint RoundUp32(uint val);    
    /// generic roundup
    static uint RoundUp(uint val, uint boundary);
};

//------------------------------------------------------------------------------
/**
*/
__forceinline uint
Round::RoundUp2(uint val)
{
    return ((uint)val + (2 - 1)) & ~(2 - 1);
}

//------------------------------------------------------------------------------
/**
*/
__forceinline uint
Round::RoundUp4(uint val)
{
    return ((uint)val + (4 - 1)) & ~(4 - 1);
}

//------------------------------------------------------------------------------
/**
*/
__forceinline uint
Round::RoundUp8(uint val)
{
    return ((uint)val + (8 - 1)) & ~(8 - 1);
}

//------------------------------------------------------------------------------
/**
*/
__forceinline uint
Round::RoundUp16(uint val)
{
    return ((uint)val + (16 - 1)) & ~(16 - 1);
}

//------------------------------------------------------------------------------
/**
*/
__forceinline uint
Round::RoundUp32(uint val)
{
    return ((uint)val + (32 - 1)) & ~(32 - 1);
}

//------------------------------------------------------------------------------
/**
*/
__forceinline uint
Round::RoundUp(uint val, uint boundary)
{
    n_assert(0 != boundary);
    return (((val - 1) / boundary) + 1) * boundary;
}

} // namespace Util
//------------------------------------------------------------------------------