Initial Commit

2018-02-08 21:28:33 -05:00
commit 678c1d3966
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+//---------------------------------------------------------------------------//
+// Copyright (c) 2013 Kyle Lutz <kyle.r.lutz@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_TRANSFORM_HPP
+#define BOOST_COMPUTE_ALGORITHM_TRANSFORM_HPP
+
+#include <boost/compute/system.hpp>
+#include <boost/compute/command_queue.hpp>
+#include <boost/compute/algorithm/copy.hpp>
+#include <boost/compute/iterator/transform_iterator.hpp>
+#include <boost/compute/iterator/zip_iterator.hpp>
+#include <boost/compute/functional/detail/unpack.hpp>
+
+namespace boost {
+namespace compute {
+
+/// Transforms the elements in the range [\p first, \p last) using
+/// operator \p op and stores the results in the range beginning at
+/// \p result.
+///
+/// For example, to calculate the absolute value for each element in a vector:
+///
+/// \snippet test/test_transform.cpp transform_abs
+///
+/// \see copy()
+template<class InputIterator, class OutputIterator, class UnaryOperator>
+inline OutputIterator transform(InputIterator first,
+                                InputIterator last,
+                                OutputIterator result,
+                                UnaryOperator op,
+                                command_queue &queue = system::default_queue())
+{
+    return copy(
+               ::boost::compute::make_transform_iterator(first, op),
+               ::boost::compute::make_transform_iterator(last, op),
+               result,
+               queue
+           );
+}
+
+/// \overload
+template<class InputIterator1,
+         class InputIterator2,
+         class OutputIterator,
+         class BinaryOperator>
+inline OutputIterator transform(InputIterator1 first1,
+                                InputIterator1 last1,
+                                InputIterator2 first2,
+                                OutputIterator result,
+                                BinaryOperator op,
+                                command_queue &queue = system::default_queue())
+{
+    typedef typename std::iterator_traits<InputIterator1>::difference_type difference_type;
+
+    difference_type n = std::distance(first1, last1);
+
+    return transform(
+               make_zip_iterator(boost::make_tuple(first1, first2)),
+               make_zip_iterator(boost::make_tuple(last1, first2 + n)),
+               result,
+               detail::unpack(op),
+               queue
+           );
+}
+
+} // end compute namespace
+} // end boost namespace
+
+#endif // BOOST_COMPUTE_ALGORITHM_TRANSFORM_HPP