Bit Operations.

Example: More...

Functions
template<class T >
int32_t	lunchbox::getIndexOfLastBit (T value)
template<class T >
void	lunchbox::byteswap (T &value)
	Swap the byte order of the given value. More...

Detailed Description

Example:

/* Copyright (c) 2011-2012, Stefan Eilemann <eile@eyescale.ch>
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License version 2.1 as published
 * by the Free Software Foundation.
 *
 * This library 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 this library; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include <lunchbox/test.h>
#include <lunchbox/bitOperation.h>

int main( int, char** )
{
    TESTINFO( lunchbox::getIndexOfLastBit( 0u ) == -1,
              lunchbox::getIndexOfLastBit( 0u ));
    TESTINFO( lunchbox::getIndexOfLastBit( 42u ) == 5,
              lunchbox::getIndexOfLastBit( 42u ));
    TESTINFO( lunchbox::getIndexOfLastBit( LB_BIT12 ) == 11,
              lunchbox::getIndexOfLastBit( LB_BIT12 ));
    TESTINFO( lunchbox::getIndexOfLastBit( LB_BIT48 ) == 47,
              lunchbox::getIndexOfLastBit( LB_BIT48 ));

    uint16_t twoByte = 1;
    lunchbox::byteswap( twoByte );
    TESTINFO( twoByte == LB_BIT9, twoByte );

    uint32_t fourByte = 1;
    lunchbox::byteswap( fourByte );
    TESTINFO( fourByte == LB_BIT25, fourByte );

    uint64_t eightByte = 1;
    lunchbox::byteswap( eightByte );
    TESTINFO( eightByte == LB_BIT57, eightByte );

    return EXIT_SUCCESS;
}

Function Documentation

template<class T >

void lunchbox::byteswap

(

T &

value

)

Swap the byte order of the given value.

Version

1.5.1

template<class T >

int32_t lunchbox::getIndexOfLastBit

(

T

value

)

Returns

the position of the last (most significant) set bit, or -1.

Version

1.8

Referenced by lunchbox::LFVector< T, nSlots >::getWriteLock(), lunchbox::LFVector< T, nSlots >::LFVector(), and lunchbox::LFVector< T, nSlots >::operator[]().

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