/usr/include/MYGUI/MyGUI_Bitwise.h is in libmygui-dev 3.2.0-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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@file
@author Albert Semenov
@date 06/2009
*/
/*
This file is part of MyGUI.
MyGUI is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
MyGUI is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with MyGUI. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __MYGUI_BITWISE_H__
#define __MYGUI_BITWISE_H__
#include "MyGUI_Prerequest.h"
namespace MyGUI
{
class Bitwise
{
public:
/** Returns the closest power-of-two number greater or equal to value.
*/
template<typename Type>
static MYGUI_FORCEINLINE Type firstPO2From(Type _value)
{
--_value;
_value |= _value >> 16;
_value |= _value >> 8;
_value |= _value >> 4;
_value |= _value >> 2;
_value |= _value >> 1;
++_value;
return _value;
}
/** Determines whether the number is power-of-two or not. */
template<typename Type>
static MYGUI_FORCEINLINE bool isPO2(Type _value)
{
return (_value & (_value - 1)) == 0;
}
/** Returns the number of bits a pattern must be shifted right by to
remove right-hand zeros.
*/
template<typename Type>
static MYGUI_FORCEINLINE size_t getBitShift(Type _mask)
{
if (_mask == 0)
return 0;
size_t result = 0;
while ((_mask & 1) == 0)
{
++result;
_mask >>= 1;
}
return result;
}
};
} // namespace MyGUI
#endif // __MYGUI_BITWISE_H__
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