1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/epoc32/include/stdapis/boost/pending/lowest_bit.hpp	Tue Mar 16 16:12:26 2010 +0000
     1.3 @@ -0,0 +1,39 @@
     1.4 +// -------------------------------------
     1.5 +// lowest_bit.hpp
     1.6 +//
     1.7 +//           Position of the lowest bit 'on'
     1.8 +//
     1.9 +//       (C) Copyright Gennaro Prota 2003 - 2004.
    1.10 +//
    1.11 +// Distributed under the Boost Software License, Version 1.0.
    1.12 +//    (See accompanying file LICENSE_1_0.txt or copy at
    1.13 +//          http://www.boost.org/LICENSE_1_0.txt)
    1.14 +//
    1.15 +// ------------------------------------------------------
    1.16 +
    1.17 +#ifndef BOOST_LOWEST_BIT_HPP_GP_20030301
    1.18 +#define BOOST_LOWEST_BIT_HPP_GP_20030301
    1.19 +
    1.20 +#include <cassert>
    1.21 +#include "boost/pending/integer_log2.hpp"
    1.22 +
    1.23 +
    1.24 +namespace boost {
    1.25 +
    1.26 +    template <typename T>
    1.27 +    int lowest_bit(T x) {
    1.28 +
    1.29 +        assert(x >= 1); // PRE
    1.30 +
    1.31 +        // clear all bits on except the rightmost one,
    1.32 +        // then calculate the logarithm base 2
    1.33 +        //
    1.34 +        return boost::integer_log2<T>( x - ( x & (x-1) ) );
    1.35 +
    1.36 +    }
    1.37 +
    1.38 +
    1.39 +}
    1.40 +
    1.41 +
    1.42 +#endif // include guard