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+//---------------------------------------------------------------------------//
+// 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_STABLE_PARTITION_HPP
+#define BOOST_COMPUTE_ALGORITHM_STABLE_PARTITION_HPP
+
+#include <boost/compute/system.hpp>
+#include <boost/compute/context.hpp>
+#include <boost/compute/functional.hpp>
+#include <boost/compute/command_queue.hpp>
+#include <boost/compute/algorithm/copy_if.hpp>
+#include <boost/compute/container/vector.hpp>
+
+namespace boost {
+namespace compute {
+
+///
+/// \brief Partitioning algorithm
+///
+/// Partitions the elements in the range [\p first, \p last) according to
+/// \p predicate. The order of the elements is preserved.
+/// \return Iterator pointing to end of true values
+///
+/// \param first Iterator pointing to start of range
+/// \param last Iterator pointing to end of range
+/// \param predicate Unary predicate to be applied on each element
+/// \param queue Queue on which to execute
+///
+/// \see is_partitioned() and partition()
+///
+template<class Iterator, class UnaryPredicate>
+inline Iterator stable_partition(Iterator first,
+ Iterator last,
+ UnaryPredicate predicate,
+ command_queue &queue = system::default_queue())
+{
+ typedef typename std::iterator_traits<Iterator>::value_type value_type;
+
+ // make temporary copy of the input
+ ::boost::compute::vector<value_type> tmp(first, last, queue);
+
+ // copy true values
+ Iterator last_true =
+ ::boost::compute::copy_if(tmp.begin(),
+ tmp.end(),
+ first,
+ predicate,
+ queue);
+
+ // copy false values
+ Iterator last_false =
+ ::boost::compute::copy_if(tmp.begin(),
+ tmp.end(),
+ last_true,
+ not1(predicate),
+ queue);
+
+ // return iterator pointing to the last true value
+ return last_true;
+}
+
+} // end compute namespace
+} // end boost namespace
+
+#endif // BOOST_COMPUTE_ALGORITHM_STABLE_PARTITION_HPP