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