mirror of
https://github.com/ecency/ecency-mobile.git
synced 2024-12-23 05:13:04 +03:00
55 lines
1.8 KiB
C++
55 lines
1.8 KiB
C++
//---------------------------------------------------------------------------//
|
|
// Copyright (c) 2014 Roshan <thisisroshansmail@gmail.com>
|
|
//
|
|
// Distributed under the Boost Software License, Version 1.0
|
|
// See accompanying file LICENSE_1_0.txt or copy at
|
|
// http://www.boost.org/LICENSE_1_0.txt
|
|
//
|
|
// See http://boostorg.github.com/compute for more information.
|
|
//---------------------------------------------------------------------------//
|
|
|
|
#ifndef BOOST_COMPUTE_ALGORITHM_ROTATE_HPP
|
|
#define BOOST_COMPUTE_ALGORITHM_ROTATE_HPP
|
|
|
|
#include <boost/compute/system.hpp>
|
|
#include <boost/compute/algorithm/copy.hpp>
|
|
#include <boost/compute/container/vector.hpp>
|
|
|
|
namespace boost {
|
|
namespace compute {
|
|
|
|
/// Performs left rotation such that element at \p n_first comes to the
|
|
/// beginning.
|
|
///
|
|
/// \see rotate_copy()
|
|
template<class InputIterator>
|
|
inline void rotate(InputIterator first,
|
|
InputIterator n_first,
|
|
InputIterator last,
|
|
command_queue &queue = system::default_queue())
|
|
{
|
|
//Handle trivial cases
|
|
if (n_first==first || n_first==last)
|
|
{
|
|
return;
|
|
}
|
|
|
|
//Handle others
|
|
typedef typename std::iterator_traits<InputIterator>::value_type T;
|
|
|
|
size_t count = detail::iterator_range_size(first, n_first);
|
|
size_t count2 = detail::iterator_range_size(first, last);
|
|
|
|
const context &context = queue.get_context();
|
|
vector<T> temp(count2, context);
|
|
::boost::compute::copy(first, last, temp.begin(), queue);
|
|
|
|
::boost::compute::copy(temp.begin()+count, temp.end(), first, queue);
|
|
::boost::compute::copy(temp.begin(), temp.begin()+count, last-count, queue);
|
|
}
|
|
|
|
} //end compute namespace
|
|
} //end boost namespace
|
|
|
|
#endif // BOOST_COMPUTE_ALGORITHM_ROTATE_HPP
|